diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/base/internal')
72 files changed, 0 insertions, 9950 deletions
diff --git a/third_party/abseil_cpp/absl/base/internal/atomic_hook.h b/third_party/abseil_cpp/absl/base/internal/atomic_hook.h deleted file mode 100644 index ae21cd7fe5..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/atomic_hook.h +++ /dev/null @@ -1,200 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_ATOMIC_HOOK_H_ -#define ABSL_BASE_INTERNAL_ATOMIC_HOOK_H_ - -#include <atomic> -#include <cassert> -#include <cstdint> -#include <utility> - -#include "absl/base/attributes.h" -#include "absl/base/config.h" - -#if defined(_MSC_VER) && !defined(__clang__) -#define ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT 0 -#else -#define ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT 1 -#endif - -#if defined(_MSC_VER) -#define ABSL_HAVE_WORKING_ATOMIC_POINTER 0 -#else -#define ABSL_HAVE_WORKING_ATOMIC_POINTER 1 -#endif - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -template <typename T> -class AtomicHook; - -// To workaround AtomicHook not being constant-initializable on some platforms, -// prefer to annotate instances with `ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES` -// instead of `ABSL_CONST_INIT`. -#if ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT -#define ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES ABSL_CONST_INIT -#else -#define ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES -#endif - -// `AtomicHook` is a helper class, templatized on a raw function pointer type, -// for implementing Abseil customization hooks. It is a callable object that -// dispatches to the registered hook. Objects of type `AtomicHook` must have -// static or thread storage duration. -// -// A default constructed object performs a no-op (and returns a default -// constructed object) if no hook has been registered. -// -// Hooks can be pre-registered via constant initialization, for example: -// -// ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static AtomicHook<void(*)()> -// my_hook(DefaultAction); -// -// and then changed at runtime via a call to `Store()`. -// -// Reads and writes guarantee memory_order_acquire/memory_order_release -// semantics. -template <typename ReturnType, typename... Args> -class AtomicHook<ReturnType (*)(Args...)> { - public: - using FnPtr = ReturnType (*)(Args...); - - // Constructs an object that by default performs a no-op (and - // returns a default constructed object) when no hook as been registered. - constexpr AtomicHook() : AtomicHook(DummyFunction) {} - - // Constructs an object that by default dispatches to/returns the - // pre-registered default_fn when no hook has been registered at runtime. -#if ABSL_HAVE_WORKING_ATOMIC_POINTER && ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT - explicit constexpr AtomicHook(FnPtr default_fn) - : hook_(default_fn), default_fn_(default_fn) {} -#elif ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT - explicit constexpr AtomicHook(FnPtr default_fn) - : hook_(kUninitialized), default_fn_(default_fn) {} -#else - // As of January 2020, on all known versions of MSVC this constructor runs in - // the global constructor sequence. If `Store()` is called by a dynamic - // initializer, we want to preserve the value, even if this constructor runs - // after the call to `Store()`. If not, `hook_` will be - // zero-initialized by the linker and we have no need to set it. - // https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html - explicit constexpr AtomicHook(FnPtr default_fn) - : /* hook_(deliberately omitted), */ default_fn_(default_fn) { - static_assert(kUninitialized == 0, "here we rely on zero-initialization"); - } -#endif - - // Stores the provided function pointer as the value for this hook. - // - // This is intended to be called once. Multiple calls are legal only if the - // same function pointer is provided for each call. The store is implemented - // as a memory_order_release operation, and read accesses are implemented as - // memory_order_acquire. - void Store(FnPtr fn) { - bool success = DoStore(fn); - static_cast<void>(success); - assert(success); - } - - // Invokes the registered callback. If no callback has yet been registered, a - // default-constructed object of the appropriate type is returned instead. - template <typename... CallArgs> - ReturnType operator()(CallArgs&&... args) const { - return DoLoad()(std::forward<CallArgs>(args)...); - } - - // Returns the registered callback, or nullptr if none has been registered. - // Useful if client code needs to conditionalize behavior based on whether a - // callback was registered. - // - // Note that atomic_hook.Load()() and atomic_hook() have different semantics: - // operator()() will perform a no-op if no callback was registered, while - // Load()() will dereference a null function pointer. Prefer operator()() to - // Load()() unless you must conditionalize behavior on whether a hook was - // registered. - FnPtr Load() const { - FnPtr ptr = DoLoad(); - return (ptr == DummyFunction) ? nullptr : ptr; - } - - private: - static ReturnType DummyFunction(Args...) { - return ReturnType(); - } - - // Current versions of MSVC (as of September 2017) have a broken - // implementation of std::atomic<T*>: Its constructor attempts to do the - // equivalent of a reinterpret_cast in a constexpr context, which is not - // allowed. - // - // This causes an issue when building with LLVM under Windows. To avoid this, - // we use a less-efficient, intptr_t-based implementation on Windows. -#if ABSL_HAVE_WORKING_ATOMIC_POINTER - // Return the stored value, or DummyFunction if no value has been stored. - FnPtr DoLoad() const { return hook_.load(std::memory_order_acquire); } - - // Store the given value. Returns false if a different value was already - // stored to this object. - bool DoStore(FnPtr fn) { - assert(fn); - FnPtr expected = default_fn_; - const bool store_succeeded = hook_.compare_exchange_strong( - expected, fn, std::memory_order_acq_rel, std::memory_order_acquire); - const bool same_value_already_stored = (expected == fn); - return store_succeeded || same_value_already_stored; - } - - std::atomic<FnPtr> hook_; -#else // !ABSL_HAVE_WORKING_ATOMIC_POINTER - // Use a sentinel value unlikely to be the address of an actual function. - static constexpr intptr_t kUninitialized = 0; - - static_assert(sizeof(intptr_t) >= sizeof(FnPtr), - "intptr_t can't contain a function pointer"); - - FnPtr DoLoad() const { - const intptr_t value = hook_.load(std::memory_order_acquire); - if (value == kUninitialized) { - return default_fn_; - } - return reinterpret_cast<FnPtr>(value); - } - - bool DoStore(FnPtr fn) { - assert(fn); - const auto value = reinterpret_cast<intptr_t>(fn); - intptr_t expected = kUninitialized; - const bool store_succeeded = hook_.compare_exchange_strong( - expected, value, std::memory_order_acq_rel, std::memory_order_acquire); - const bool same_value_already_stored = (expected == value); - return store_succeeded || same_value_already_stored; - } - - std::atomic<intptr_t> hook_; -#endif - - const FnPtr default_fn_; -}; - -#undef ABSL_HAVE_WORKING_ATOMIC_POINTER -#undef ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_ATOMIC_HOOK_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/atomic_hook_test.cc b/third_party/abseil_cpp/absl/base/internal/atomic_hook_test.cc deleted file mode 100644 index e577a8fd93..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/atomic_hook_test.cc +++ /dev/null @@ -1,97 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/atomic_hook.h" - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/base/attributes.h" -#include "absl/base/internal/atomic_hook_test_helper.h" - -namespace { - -using ::testing::Eq; - -int value = 0; -void TestHook(int x) { value = x; } - -TEST(AtomicHookTest, NoDefaultFunction) { - ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook< - void (*)(int)> - hook; - value = 0; - - // Test the default DummyFunction. - EXPECT_TRUE(hook.Load() == nullptr); - EXPECT_EQ(value, 0); - hook(1); - EXPECT_EQ(value, 0); - - // Test a stored hook. - hook.Store(TestHook); - EXPECT_TRUE(hook.Load() == TestHook); - EXPECT_EQ(value, 0); - hook(1); - EXPECT_EQ(value, 1); - - // Calling Store() with the same hook should not crash. - hook.Store(TestHook); - EXPECT_TRUE(hook.Load() == TestHook); - EXPECT_EQ(value, 1); - hook(2); - EXPECT_EQ(value, 2); -} - -TEST(AtomicHookTest, WithDefaultFunction) { - // Set the default value to TestHook at compile-time. - ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook< - void (*)(int)> - hook(TestHook); - value = 0; - - // Test the default value is TestHook. - EXPECT_TRUE(hook.Load() == TestHook); - EXPECT_EQ(value, 0); - hook(1); - EXPECT_EQ(value, 1); - - // Calling Store() with the same hook should not crash. - hook.Store(TestHook); - EXPECT_TRUE(hook.Load() == TestHook); - EXPECT_EQ(value, 1); - hook(2); - EXPECT_EQ(value, 2); -} - -ABSL_CONST_INIT int override_func_calls = 0; -void OverrideFunc() { override_func_calls++; } -static struct OverrideInstaller { - OverrideInstaller() { absl::atomic_hook_internal::func.Store(OverrideFunc); } -} override_installer; - -TEST(AtomicHookTest, DynamicInitFromAnotherTU) { - // MSVC 14.2 doesn't do constexpr static init correctly; in particular it - // tends to sequence static init (i.e. defaults) of `AtomicHook` objects - // after their dynamic init (i.e. overrides), overwriting whatever value was - // written during dynamic init. This regression test validates the fix. - // https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html - EXPECT_THAT(absl::atomic_hook_internal::default_func_calls, Eq(0)); - EXPECT_THAT(override_func_calls, Eq(0)); - absl::atomic_hook_internal::func(); - EXPECT_THAT(absl::atomic_hook_internal::default_func_calls, Eq(0)); - EXPECT_THAT(override_func_calls, Eq(1)); - EXPECT_THAT(absl::atomic_hook_internal::func.Load(), Eq(OverrideFunc)); -} - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/atomic_hook_test_helper.cc b/third_party/abseil_cpp/absl/base/internal/atomic_hook_test_helper.cc deleted file mode 100644 index 537d47cd2d..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/atomic_hook_test_helper.cc +++ /dev/null @@ -1,32 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/atomic_hook_test_helper.h" - -#include "absl/base/attributes.h" -#include "absl/base/internal/atomic_hook.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace atomic_hook_internal { - -ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES absl::base_internal::AtomicHook<VoidF> - func(DefaultFunc); -ABSL_CONST_INIT int default_func_calls = 0; -void DefaultFunc() { default_func_calls++; } -void RegisterFunc(VoidF f) { func.Store(f); } - -} // namespace atomic_hook_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/atomic_hook_test_helper.h b/third_party/abseil_cpp/absl/base/internal/atomic_hook_test_helper.h deleted file mode 100644 index 3e72b4977d..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/atomic_hook_test_helper.h +++ /dev/null @@ -1,34 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_ -#define ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_ - -#include "absl/base/internal/atomic_hook.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace atomic_hook_internal { - -using VoidF = void (*)(); -extern absl::base_internal::AtomicHook<VoidF> func; -extern int default_func_calls; -void DefaultFunc(); -void RegisterFunc(VoidF func); - -} // namespace atomic_hook_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/bits.h b/third_party/abseil_cpp/absl/base/internal/bits.h deleted file mode 100644 index 14c51d8b30..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/bits.h +++ /dev/null @@ -1,218 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_BITS_H_ -#define ABSL_BASE_INTERNAL_BITS_H_ - -// This file contains bitwise ops which are implementation details of various -// absl libraries. - -#include <cstdint> - -#include "absl/base/config.h" - -// Clang on Windows has __builtin_clzll; otherwise we need to use the -// windows intrinsic functions. -#if defined(_MSC_VER) && !defined(__clang__) -#include <intrin.h> -#if defined(_M_X64) -#pragma intrinsic(_BitScanReverse64) -#pragma intrinsic(_BitScanForward64) -#endif -#pragma intrinsic(_BitScanReverse) -#pragma intrinsic(_BitScanForward) -#endif - -#include "absl/base/attributes.h" - -#if defined(_MSC_VER) && !defined(__clang__) -// We can achieve something similar to attribute((always_inline)) with MSVC by -// using the __forceinline keyword, however this is not perfect. MSVC is -// much less aggressive about inlining, and even with the __forceinline keyword. -#define ABSL_BASE_INTERNAL_FORCEINLINE __forceinline -#else -// Use default attribute inline. -#define ABSL_BASE_INTERNAL_FORCEINLINE inline ABSL_ATTRIBUTE_ALWAYS_INLINE -#endif - - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -ABSL_BASE_INTERNAL_FORCEINLINE int CountLeadingZeros64Slow(uint64_t n) { - int zeroes = 60; - if (n >> 32) { - zeroes -= 32; - n >>= 32; - } - if (n >> 16) { - zeroes -= 16; - n >>= 16; - } - if (n >> 8) { - zeroes -= 8; - n >>= 8; - } - if (n >> 4) { - zeroes -= 4; - n >>= 4; - } - return "\4\3\2\2\1\1\1\1\0\0\0\0\0\0\0"[n] + zeroes; -} - -ABSL_BASE_INTERNAL_FORCEINLINE int CountLeadingZeros64(uint64_t n) { -#if defined(_MSC_VER) && !defined(__clang__) && defined(_M_X64) - // MSVC does not have __buitin_clzll. Use _BitScanReverse64. - unsigned long result = 0; // NOLINT(runtime/int) - if (_BitScanReverse64(&result, n)) { - return 63 - result; - } - return 64; -#elif defined(_MSC_VER) && !defined(__clang__) - // MSVC does not have __buitin_clzll. Compose two calls to _BitScanReverse - unsigned long result = 0; // NOLINT(runtime/int) - if ((n >> 32) && _BitScanReverse(&result, n >> 32)) { - return 31 - result; - } - if (_BitScanReverse(&result, n)) { - return 63 - result; - } - return 64; -#elif defined(__GNUC__) || defined(__clang__) - // Use __builtin_clzll, which uses the following instructions: - // x86: bsr - // ARM64: clz - // PPC: cntlzd - static_assert(sizeof(unsigned long long) == sizeof(n), // NOLINT(runtime/int) - "__builtin_clzll does not take 64-bit arg"); - - // Handle 0 as a special case because __builtin_clzll(0) is undefined. - if (n == 0) { - return 64; - } - return __builtin_clzll(n); -#else - return CountLeadingZeros64Slow(n); -#endif -} - -ABSL_BASE_INTERNAL_FORCEINLINE int CountLeadingZeros32Slow(uint64_t n) { - int zeroes = 28; - if (n >> 16) { - zeroes -= 16; - n >>= 16; - } - if (n >> 8) { - zeroes -= 8; - n >>= 8; - } - if (n >> 4) { - zeroes -= 4; - n >>= 4; - } - return "\4\3\2\2\1\1\1\1\0\0\0\0\0\0\0"[n] + zeroes; -} - -ABSL_BASE_INTERNAL_FORCEINLINE int CountLeadingZeros32(uint32_t n) { -#if defined(_MSC_VER) && !defined(__clang__) - unsigned long result = 0; // NOLINT(runtime/int) - if (_BitScanReverse(&result, n)) { - return 31 - result; - } - return 32; -#elif defined(__GNUC__) || defined(__clang__) - // Use __builtin_clz, which uses the following instructions: - // x86: bsr - // ARM64: clz - // PPC: cntlzd - static_assert(sizeof(int) == sizeof(n), - "__builtin_clz does not take 32-bit arg"); - - // Handle 0 as a special case because __builtin_clz(0) is undefined. - if (n == 0) { - return 32; - } - return __builtin_clz(n); -#else - return CountLeadingZeros32Slow(n); -#endif -} - -ABSL_BASE_INTERNAL_FORCEINLINE int CountTrailingZerosNonZero64Slow(uint64_t n) { - int c = 63; - n &= ~n + 1; - if (n & 0x00000000FFFFFFFF) c -= 32; - if (n & 0x0000FFFF0000FFFF) c -= 16; - if (n & 0x00FF00FF00FF00FF) c -= 8; - if (n & 0x0F0F0F0F0F0F0F0F) c -= 4; - if (n & 0x3333333333333333) c -= 2; - if (n & 0x5555555555555555) c -= 1; - return c; -} - -ABSL_BASE_INTERNAL_FORCEINLINE int CountTrailingZerosNonZero64(uint64_t n) { -#if defined(_MSC_VER) && !defined(__clang__) && defined(_M_X64) - unsigned long result = 0; // NOLINT(runtime/int) - _BitScanForward64(&result, n); - return result; -#elif defined(_MSC_VER) && !defined(__clang__) - unsigned long result = 0; // NOLINT(runtime/int) - if (static_cast<uint32_t>(n) == 0) { - _BitScanForward(&result, n >> 32); - return result + 32; - } - _BitScanForward(&result, n); - return result; -#elif defined(__GNUC__) || defined(__clang__) - static_assert(sizeof(unsigned long long) == sizeof(n), // NOLINT(runtime/int) - "__builtin_ctzll does not take 64-bit arg"); - return __builtin_ctzll(n); -#else - return CountTrailingZerosNonZero64Slow(n); -#endif -} - -ABSL_BASE_INTERNAL_FORCEINLINE int CountTrailingZerosNonZero32Slow(uint32_t n) { - int c = 31; - n &= ~n + 1; - if (n & 0x0000FFFF) c -= 16; - if (n & 0x00FF00FF) c -= 8; - if (n & 0x0F0F0F0F) c -= 4; - if (n & 0x33333333) c -= 2; - if (n & 0x55555555) c -= 1; - return c; -} - -ABSL_BASE_INTERNAL_FORCEINLINE int CountTrailingZerosNonZero32(uint32_t n) { -#if defined(_MSC_VER) && !defined(__clang__) - unsigned long result = 0; // NOLINT(runtime/int) - _BitScanForward(&result, n); - return result; -#elif defined(__GNUC__) || defined(__clang__) - static_assert(sizeof(int) == sizeof(n), - "__builtin_ctz does not take 32-bit arg"); - return __builtin_ctz(n); -#else - return CountTrailingZerosNonZero32Slow(n); -#endif -} - -#undef ABSL_BASE_INTERNAL_FORCEINLINE - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_BITS_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/bits_test.cc b/third_party/abseil_cpp/absl/base/internal/bits_test.cc deleted file mode 100644 index 7855fa6297..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/bits_test.cc +++ /dev/null @@ -1,97 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/bits.h" - -#include "gtest/gtest.h" - -namespace { - -int CLZ64(uint64_t n) { - int fast = absl::base_internal::CountLeadingZeros64(n); - int slow = absl::base_internal::CountLeadingZeros64Slow(n); - EXPECT_EQ(fast, slow) << n; - return fast; -} - -TEST(BitsTest, CountLeadingZeros64) { - EXPECT_EQ(64, CLZ64(uint64_t{})); - EXPECT_EQ(0, CLZ64(~uint64_t{})); - - for (int index = 0; index < 64; index++) { - uint64_t x = static_cast<uint64_t>(1) << index; - const auto cnt = 63 - index; - ASSERT_EQ(cnt, CLZ64(x)) << index; - ASSERT_EQ(cnt, CLZ64(x + x - 1)) << index; - } -} - -int CLZ32(uint32_t n) { - int fast = absl::base_internal::CountLeadingZeros32(n); - int slow = absl::base_internal::CountLeadingZeros32Slow(n); - EXPECT_EQ(fast, slow) << n; - return fast; -} - -TEST(BitsTest, CountLeadingZeros32) { - EXPECT_EQ(32, CLZ32(uint32_t{})); - EXPECT_EQ(0, CLZ32(~uint32_t{})); - - for (int index = 0; index < 32; index++) { - uint32_t x = static_cast<uint32_t>(1) << index; - const auto cnt = 31 - index; - ASSERT_EQ(cnt, CLZ32(x)) << index; - ASSERT_EQ(cnt, CLZ32(x + x - 1)) << index; - ASSERT_EQ(CLZ64(x), CLZ32(x) + 32); - } -} - -int CTZ64(uint64_t n) { - int fast = absl::base_internal::CountTrailingZerosNonZero64(n); - int slow = absl::base_internal::CountTrailingZerosNonZero64Slow(n); - EXPECT_EQ(fast, slow) << n; - return fast; -} - -TEST(BitsTest, CountTrailingZerosNonZero64) { - EXPECT_EQ(0, CTZ64(~uint64_t{})); - - for (int index = 0; index < 64; index++) { - uint64_t x = static_cast<uint64_t>(1) << index; - const auto cnt = index; - ASSERT_EQ(cnt, CTZ64(x)) << index; - ASSERT_EQ(cnt, CTZ64(~(x - 1))) << index; - } -} - -int CTZ32(uint32_t n) { - int fast = absl::base_internal::CountTrailingZerosNonZero32(n); - int slow = absl::base_internal::CountTrailingZerosNonZero32Slow(n); - EXPECT_EQ(fast, slow) << n; - return fast; -} - -TEST(BitsTest, CountTrailingZerosNonZero32) { - EXPECT_EQ(0, CTZ32(~uint32_t{})); - - for (int index = 0; index < 32; index++) { - uint32_t x = static_cast<uint32_t>(1) << index; - const auto cnt = index; - ASSERT_EQ(cnt, CTZ32(x)) << index; - ASSERT_EQ(cnt, CTZ32(~(x - 1))) << index; - } -} - - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/cmake_thread_test.cc b/third_party/abseil_cpp/absl/base/internal/cmake_thread_test.cc deleted file mode 100644 index f70bb24eb7..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/cmake_thread_test.cc +++ /dev/null @@ -1,22 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include <iostream> -#include "absl/base/internal/thread_identity.h" - -int main() { - auto* tid = absl::base_internal::CurrentThreadIdentityIfPresent(); - // Make sure the above call can't be optimized out - std::cout << (void*)tid << std::endl; -} diff --git a/third_party/abseil_cpp/absl/base/internal/cycleclock.cc b/third_party/abseil_cpp/absl/base/internal/cycleclock.cc deleted file mode 100644 index 0e65005b89..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/cycleclock.cc +++ /dev/null @@ -1,107 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// The implementation of CycleClock::Frequency. -// -// NOTE: only i386 and x86_64 have been well tested. -// PPC, sparc, alpha, and ia64 are based on -// http://peter.kuscsik.com/wordpress/?p=14 -// with modifications by m3b. See also -// https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h - -#include "absl/base/internal/cycleclock.h" - -#include <atomic> -#include <chrono> // NOLINT(build/c++11) - -#include "absl/base/internal/unscaledcycleclock.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -#if ABSL_USE_UNSCALED_CYCLECLOCK - -namespace { - -#ifdef NDEBUG -#ifdef ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY -// Not debug mode and the UnscaledCycleClock frequency is the CPU -// frequency. Scale the CycleClock to prevent overflow if someone -// tries to represent the time as cycles since the Unix epoch. -static constexpr int32_t kShift = 1; -#else -// Not debug mode and the UnscaledCycleClock isn't operating at the -// raw CPU frequency. There is no need to do any scaling, so don't -// needlessly sacrifice precision. -static constexpr int32_t kShift = 0; -#endif -#else -// In debug mode use a different shift to discourage depending on a -// particular shift value. -static constexpr int32_t kShift = 2; -#endif - -static constexpr double kFrequencyScale = 1.0 / (1 << kShift); -static std::atomic<CycleClockSourceFunc> cycle_clock_source; - -CycleClockSourceFunc LoadCycleClockSource() { - // Optimize for the common case (no callback) by first doing a relaxed load; - // this is significantly faster on non-x86 platforms. - if (cycle_clock_source.load(std::memory_order_relaxed) == nullptr) { - return nullptr; - } - // This corresponds to the store(std::memory_order_release) in - // CycleClockSource::Register, and makes sure that any updates made prior to - // registering the callback are visible to this thread before the callback is - // invoked. - return cycle_clock_source.load(std::memory_order_acquire); -} - -} // namespace - -int64_t CycleClock::Now() { - auto fn = LoadCycleClockSource(); - if (fn == nullptr) { - return base_internal::UnscaledCycleClock::Now() >> kShift; - } - return fn() >> kShift; -} - -double CycleClock::Frequency() { - return kFrequencyScale * base_internal::UnscaledCycleClock::Frequency(); -} - -void CycleClockSource::Register(CycleClockSourceFunc source) { - // Corresponds to the load(std::memory_order_acquire) in LoadCycleClockSource. - cycle_clock_source.store(source, std::memory_order_release); -} - -#else - -int64_t CycleClock::Now() { - return std::chrono::duration_cast<std::chrono::nanoseconds>( - std::chrono::steady_clock::now().time_since_epoch()) - .count(); -} - -double CycleClock::Frequency() { - return 1e9; -} - -#endif - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/cycleclock.h b/third_party/abseil_cpp/absl/base/internal/cycleclock.h deleted file mode 100644 index a18b584445..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/cycleclock.h +++ /dev/null @@ -1,94 +0,0 @@ -// -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -// ----------------------------------------------------------------------------- -// File: cycleclock.h -// ----------------------------------------------------------------------------- -// -// This header file defines a `CycleClock`, which yields the value and frequency -// of a cycle counter that increments at a rate that is approximately constant. -// -// NOTE: -// -// The cycle counter frequency is not necessarily related to the core clock -// frequency and should not be treated as such. That is, `CycleClock` cycles are -// not necessarily "CPU cycles" and code should not rely on that behavior, even -// if experimentally observed. -// -// An arbitrary offset may have been added to the counter at power on. -// -// On some platforms, the rate and offset of the counter may differ -// slightly when read from different CPUs of a multiprocessor. Usually, -// we try to ensure that the operating system adjusts values periodically -// so that values agree approximately. If you need stronger guarantees, -// consider using alternate interfaces. -// -// The CPU is not required to maintain the ordering of a cycle counter read -// with respect to surrounding instructions. - -#ifndef ABSL_BASE_INTERNAL_CYCLECLOCK_H_ -#define ABSL_BASE_INTERNAL_CYCLECLOCK_H_ - -#include <cstdint> - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// ----------------------------------------------------------------------------- -// CycleClock -// ----------------------------------------------------------------------------- -class CycleClock { - public: - // CycleClock::Now() - // - // Returns the value of a cycle counter that counts at a rate that is - // approximately constant. - static int64_t Now(); - - // CycleClock::Frequency() - // - // Returns the amount by which `CycleClock::Now()` increases per second. Note - // that this value may not necessarily match the core CPU clock frequency. - static double Frequency(); - - private: - CycleClock() = delete; // no instances - CycleClock(const CycleClock&) = delete; - CycleClock& operator=(const CycleClock&) = delete; -}; - -using CycleClockSourceFunc = int64_t (*)(); - -class CycleClockSource { - private: - // CycleClockSource::Register() - // - // Register a function that provides an alternate source for the unscaled CPU - // cycle count value. The source function must be async signal safe, must not - // call CycleClock::Now(), and must have a frequency that matches that of the - // unscaled clock used by CycleClock. A nullptr value resets CycleClock to use - // the default source. - static void Register(CycleClockSourceFunc source); -}; - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_CYCLECLOCK_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/direct_mmap.h b/third_party/abseil_cpp/absl/base/internal/direct_mmap.h deleted file mode 100644 index 16accf0966..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/direct_mmap.h +++ /dev/null @@ -1,166 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// Functions for directly invoking mmap() via syscall, avoiding the case where -// mmap() has been locally overridden. - -#ifndef ABSL_BASE_INTERNAL_DIRECT_MMAP_H_ -#define ABSL_BASE_INTERNAL_DIRECT_MMAP_H_ - -#include "absl/base/config.h" - -#if ABSL_HAVE_MMAP - -#include <sys/mman.h> - -#ifdef __linux__ - -#include <sys/types.h> -#ifdef __BIONIC__ -#include <sys/syscall.h> -#else -#include <syscall.h> -#endif - -#include <linux/unistd.h> -#include <unistd.h> -#include <cerrno> -#include <cstdarg> -#include <cstdint> - -#ifdef __mips__ -// Include definitions of the ABI currently in use. -#ifdef __BIONIC__ -// Android doesn't have sgidefs.h, but does have asm/sgidefs.h, which has the -// definitions we need. -#include <asm/sgidefs.h> -#else -#include <sgidefs.h> -#endif // __BIONIC__ -#endif // __mips__ - -// SYS_mmap and SYS_munmap are not defined in Android. -#ifdef __BIONIC__ -extern "C" void* __mmap2(void*, size_t, int, int, int, size_t); -#if defined(__NR_mmap) && !defined(SYS_mmap) -#define SYS_mmap __NR_mmap -#endif -#ifndef SYS_munmap -#define SYS_munmap __NR_munmap -#endif -#endif // __BIONIC__ - -#if defined(__NR_mmap2) && !defined(SYS_mmap2) -#define SYS_mmap2 __NR_mmap2 -#endif - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// Platform specific logic extracted from -// https://chromium.googlesource.com/linux-syscall-support/+/master/linux_syscall_support.h -inline void* DirectMmap(void* start, size_t length, int prot, int flags, int fd, - off64_t offset) noexcept { -#if defined(__i386__) || defined(__ARM_ARCH_3__) || defined(__ARM_EABI__) || \ - (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32) || \ - (defined(__PPC__) && !defined(__PPC64__)) || \ - (defined(__riscv) && __riscv_xlen == 32) || \ - (defined(__s390__) && !defined(__s390x__)) - // On these architectures, implement mmap with mmap2. - static int pagesize = 0; - if (pagesize == 0) { -#if defined(__wasm__) || defined(__asmjs__) - pagesize = getpagesize(); -#else - pagesize = sysconf(_SC_PAGESIZE); -#endif - } - if (offset < 0 || offset % pagesize != 0) { - errno = EINVAL; - return MAP_FAILED; - } -#ifdef __BIONIC__ - // SYS_mmap2 has problems on Android API level <= 16. - // Workaround by invoking __mmap2() instead. - return __mmap2(start, length, prot, flags, fd, offset / pagesize); -#else - return reinterpret_cast<void*>( - syscall(SYS_mmap2, start, length, prot, flags, fd, - static_cast<off_t>(offset / pagesize))); -#endif -#elif defined(__s390x__) - // On s390x, mmap() arguments are passed in memory. - unsigned long buf[6] = {reinterpret_cast<unsigned long>(start), // NOLINT - static_cast<unsigned long>(length), // NOLINT - static_cast<unsigned long>(prot), // NOLINT - static_cast<unsigned long>(flags), // NOLINT - static_cast<unsigned long>(fd), // NOLINT - static_cast<unsigned long>(offset)}; // NOLINT - return reinterpret_cast<void*>(syscall(SYS_mmap, buf)); -#elif defined(__x86_64__) -// The x32 ABI has 32 bit longs, but the syscall interface is 64 bit. -// We need to explicitly cast to an unsigned 64 bit type to avoid implicit -// sign extension. We can't cast pointers directly because those are -// 32 bits, and gcc will dump ugly warnings about casting from a pointer -// to an integer of a different size. We also need to make sure __off64_t -// isn't truncated to 32-bits under x32. -#define MMAP_SYSCALL_ARG(x) ((uint64_t)(uintptr_t)(x)) - return reinterpret_cast<void*>( - syscall(SYS_mmap, MMAP_SYSCALL_ARG(start), MMAP_SYSCALL_ARG(length), - MMAP_SYSCALL_ARG(prot), MMAP_SYSCALL_ARG(flags), - MMAP_SYSCALL_ARG(fd), static_cast<uint64_t>(offset))); -#undef MMAP_SYSCALL_ARG -#else // Remaining 64-bit aritectures. - static_assert(sizeof(unsigned long) == 8, "Platform is not 64-bit"); - return reinterpret_cast<void*>( - syscall(SYS_mmap, start, length, prot, flags, fd, offset)); -#endif -} - -inline int DirectMunmap(void* start, size_t length) { - return static_cast<int>(syscall(SYS_munmap, start, length)); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#else // !__linux__ - -// For non-linux platforms where we have mmap, just dispatch directly to the -// actual mmap()/munmap() methods. - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -inline void* DirectMmap(void* start, size_t length, int prot, int flags, int fd, - off_t offset) { - return mmap(start, length, prot, flags, fd, offset); -} - -inline int DirectMunmap(void* start, size_t length) { - return munmap(start, length); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // __linux__ - -#endif // ABSL_HAVE_MMAP - -#endif // ABSL_BASE_INTERNAL_DIRECT_MMAP_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/dynamic_annotations.h b/third_party/abseil_cpp/absl/base/internal/dynamic_annotations.h deleted file mode 100644 index 7d80f41c5d..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/dynamic_annotations.h +++ /dev/null @@ -1,403 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// This file defines dynamic annotations for use with dynamic analysis tool -// such as valgrind, PIN, etc. -// -// Dynamic annotation is a source code annotation that affects the generated -// code (that is, the annotation is not a comment). Each such annotation is -// attached to a particular instruction and/or to a particular object (address) -// in the program. -// -// The annotations that should be used by users are macros in all upper-case -// (e.g., ANNOTATE_THREAD_NAME). -// -// Actual implementation of these macros may differ depending on the dynamic -// analysis tool being used. -// -// This file supports the following configurations: -// - Dynamic Annotations enabled (with static thread-safety warnings disabled). -// In this case, macros expand to functions implemented by Thread Sanitizer, -// when building with TSan. When not provided an external implementation, -// dynamic_annotations.cc provides no-op implementations. -// -// - Static Clang thread-safety warnings enabled. -// When building with a Clang compiler that supports thread-safety warnings, -// a subset of annotations can be statically-checked at compile-time. We -// expand these macros to static-inline functions that can be analyzed for -// thread-safety, but afterwards elided when building the final binary. -// -// - All annotations are disabled. -// If neither Dynamic Annotations nor Clang thread-safety warnings are -// enabled, then all annotation-macros expand to empty. - -#ifndef ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_ -#define ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_ - -#include <stddef.h> - -#include "absl/base/config.h" - -// ------------------------------------------------------------------------- -// Decide which features are enabled - -#ifndef DYNAMIC_ANNOTATIONS_ENABLED -#define DYNAMIC_ANNOTATIONS_ENABLED 0 -#endif - -#if defined(__clang__) && !defined(SWIG) -#define ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED 1 -#else -#define ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED 0 -#endif - -#if DYNAMIC_ANNOTATIONS_ENABLED != 0 - -#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 1 -#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 1 -#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 1 -#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0 -#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED 1 - -#else - -#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 0 -#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 0 -#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 0 - -// Clang provides limited support for static thread-safety analysis through a -// feature called Annotalysis. We configure macro-definitions according to -// whether Annotalysis support is available. When running in opt-mode, GCC -// will issue a warning, if these attributes are compiled. Only include them -// when compiling using Clang. - -// ANNOTALYSIS_ENABLED == 1 when IGNORE_READ_ATTRIBUTE_ENABLED == 1 -#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED \ - ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED -// Read/write annotations are enabled in Annotalysis mode; disabled otherwise. -#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED \ - ABSL_INTERNAL_ANNOTALYSIS_ENABLED -#endif - -// Memory annotations are also made available to LLVM's Memory Sanitizer -#if defined(MEMORY_SANITIZER) && defined(__has_feature) && \ - !defined(__native_client__) -#if __has_feature(memory_sanitizer) -#define ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED 1 -#endif -#endif - -#ifndef ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED -#define ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED 0 -#endif - -#ifdef __cplusplus -#define ABSL_INTERNAL_BEGIN_EXTERN_C extern "C" { -#define ABSL_INTERNAL_END_EXTERN_C } // extern "C" -#define ABSL_INTERNAL_GLOBAL_SCOPED(F) ::F -#define ABSL_INTERNAL_STATIC_INLINE inline -#else -#define ABSL_INTERNAL_BEGIN_EXTERN_C // empty -#define ABSL_INTERNAL_END_EXTERN_C // empty -#define ABSL_INTERNAL_GLOBAL_SCOPED(F) F -#define ABSL_INTERNAL_STATIC_INLINE static inline -#endif - -// ------------------------------------------------------------------------- -// Define race annotations. - -#if ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 1 - -// ------------------------------------------------------------- -// Annotations that suppress errors. It is usually better to express the -// program's synchronization using the other annotations, but these can be used -// when all else fails. - -// Report that we may have a benign race at `pointer`, with size -// "sizeof(*(pointer))". `pointer` must be a non-void* pointer. Insert at the -// point where `pointer` has been allocated, preferably close to the point -// where the race happens. See also ANNOTATE_BENIGN_RACE_STATIC. -#define ANNOTATE_BENIGN_RACE(pointer, description) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized) \ - (__FILE__, __LINE__, pointer, sizeof(*(pointer)), description) - -// Same as ANNOTATE_BENIGN_RACE(`address`, `description`), but applies to -// the memory range [`address`, `address`+`size`). -#define ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized) \ - (__FILE__, __LINE__, address, size, description) - -// Enable (`enable`!=0) or disable (`enable`==0) race detection for all threads. -// This annotation could be useful if you want to skip expensive race analysis -// during some period of program execution, e.g. during initialization. -#define ANNOTATE_ENABLE_RACE_DETECTION(enable) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateEnableRaceDetection) \ - (__FILE__, __LINE__, enable) - -// ------------------------------------------------------------- -// Annotations useful for debugging. - -// Report the current thread `name` to a race detector. -#define ANNOTATE_THREAD_NAME(name) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateThreadName)(__FILE__, __LINE__, name) - -// ------------------------------------------------------------- -// Annotations useful when implementing locks. They are not normally needed by -// modules that merely use locks. The `lock` argument is a pointer to the lock -// object. - -// Report that a lock has been created at address `lock`. -#define ANNOTATE_RWLOCK_CREATE(lock) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreate)(__FILE__, __LINE__, lock) - -// Report that a linker initialized lock has been created at address `lock`. -#ifdef THREAD_SANITIZER -#define ANNOTATE_RWLOCK_CREATE_STATIC(lock) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreateStatic) \ - (__FILE__, __LINE__, lock) -#else -#define ANNOTATE_RWLOCK_CREATE_STATIC(lock) ANNOTATE_RWLOCK_CREATE(lock) -#endif - -// Report that the lock at address `lock` is about to be destroyed. -#define ANNOTATE_RWLOCK_DESTROY(lock) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockDestroy)(__FILE__, __LINE__, lock) - -// Report that the lock at address `lock` has been acquired. -// `is_w`=1 for writer lock, `is_w`=0 for reader lock. -#define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockAcquired) \ - (__FILE__, __LINE__, lock, is_w) - -// Report that the lock at address `lock` is about to be released. -// `is_w`=1 for writer lock, `is_w`=0 for reader lock. -#define ANNOTATE_RWLOCK_RELEASED(lock, is_w) \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockReleased) \ - (__FILE__, __LINE__, lock, is_w) - -// Apply ANNOTATE_BENIGN_RACE_SIZED to a static variable `static_var`. -#define ANNOTATE_BENIGN_RACE_STATIC(static_var, description) \ - namespace { \ - class static_var##_annotator { \ - public: \ - static_var##_annotator() { \ - ANNOTATE_BENIGN_RACE_SIZED(&static_var, sizeof(static_var), \ - #static_var ": " description); \ - } \ - }; \ - static static_var##_annotator the##static_var##_annotator; \ - } // namespace - -#else // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 0 - -#define ANNOTATE_RWLOCK_CREATE(lock) // empty -#define ANNOTATE_RWLOCK_CREATE_STATIC(lock) // empty -#define ANNOTATE_RWLOCK_DESTROY(lock) // empty -#define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) // empty -#define ANNOTATE_RWLOCK_RELEASED(lock, is_w) // empty -#define ANNOTATE_BENIGN_RACE(address, description) // empty -#define ANNOTATE_BENIGN_RACE_SIZED(address, size, description) // empty -#define ANNOTATE_THREAD_NAME(name) // empty -#define ANNOTATE_ENABLE_RACE_DETECTION(enable) // empty -#define ANNOTATE_BENIGN_RACE_STATIC(static_var, description) // empty - -#endif // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED - -// ------------------------------------------------------------------------- -// Define memory annotations. - -#if ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED == 1 - -#include <sanitizer/msan_interface.h> - -#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \ - __msan_unpoison(address, size) - -#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \ - __msan_allocated_memory(address, size) - -#else // ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED == 0 - -#if DYNAMIC_ANNOTATIONS_ENABLED == 1 -#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \ - do { \ - (void)(address); \ - (void)(size); \ - } while (0) -#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \ - do { \ - (void)(address); \ - (void)(size); \ - } while (0) -#else -#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size) // empty -#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) // empty -#endif - -#endif // ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED - -// ------------------------------------------------------------------------- -// Define IGNORE_READS_BEGIN/_END attributes. - -#if ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED == 1 - -#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE \ - __attribute((exclusive_lock_function("*"))) -#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE \ - __attribute((unlock_function("*"))) - -#else // ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED == 0 - -#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE // empty -#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE // empty - -#endif // ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED - -// ------------------------------------------------------------------------- -// Define IGNORE_READS_BEGIN/_END annotations. - -#if ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED == 1 - -// Request the analysis tool to ignore all reads in the current thread until -// ANNOTATE_IGNORE_READS_END is called. Useful to ignore intentional racey -// reads, while still checking other reads and all writes. -// See also ANNOTATE_UNPROTECTED_READ. -#define ANNOTATE_IGNORE_READS_BEGIN() \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsBegin)(__FILE__, __LINE__) - -// Stop ignoring reads. -#define ANNOTATE_IGNORE_READS_END() \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsEnd)(__FILE__, __LINE__) - -#elif defined(ABSL_INTERNAL_ANNOTALYSIS_ENABLED) - -// When Annotalysis is enabled without Dynamic Annotations, the use of -// static-inline functions allows the annotations to be read at compile-time, -// while still letting the compiler elide the functions from the final build. -// -// TODO(delesley) -- The exclusive lock here ignores writes as well, but -// allows IGNORE_READS_AND_WRITES to work properly. - -#define ANNOTATE_IGNORE_READS_BEGIN() \ - ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsBegin)() - -#define ANNOTATE_IGNORE_READS_END() \ - ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsEnd)() - -#else - -#define ANNOTATE_IGNORE_READS_BEGIN() // empty -#define ANNOTATE_IGNORE_READS_END() // empty - -#endif - -// ------------------------------------------------------------------------- -// Define IGNORE_WRITES_BEGIN/_END annotations. - -#if ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED == 1 - -// Similar to ANNOTATE_IGNORE_READS_BEGIN, but ignore writes instead. -#define ANNOTATE_IGNORE_WRITES_BEGIN() \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesBegin)(__FILE__, __LINE__) - -// Stop ignoring writes. -#define ANNOTATE_IGNORE_WRITES_END() \ - ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesEnd)(__FILE__, __LINE__) - -#else - -#define ANNOTATE_IGNORE_WRITES_BEGIN() // empty -#define ANNOTATE_IGNORE_WRITES_END() // empty - -#endif - -// ------------------------------------------------------------------------- -// Define the ANNOTATE_IGNORE_READS_AND_WRITES_* annotations using the more -// primitive annotations defined above. -// -// Instead of doing -// ANNOTATE_IGNORE_READS_BEGIN(); -// ... = x; -// ANNOTATE_IGNORE_READS_END(); -// one can use -// ... = ANNOTATE_UNPROTECTED_READ(x); - -#if defined(ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED) - -// Start ignoring all memory accesses (both reads and writes). -#define ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() \ - do { \ - ANNOTATE_IGNORE_READS_BEGIN(); \ - ANNOTATE_IGNORE_WRITES_BEGIN(); \ - } while (0) - -// Stop ignoring both reads and writes. -#define ANNOTATE_IGNORE_READS_AND_WRITES_END() \ - do { \ - ANNOTATE_IGNORE_WRITES_END(); \ - ANNOTATE_IGNORE_READS_END(); \ - } while (0) - -#ifdef __cplusplus -// ANNOTATE_UNPROTECTED_READ is the preferred way to annotate racey reads. -#define ANNOTATE_UNPROTECTED_READ(x) \ - absl::base_internal::AnnotateUnprotectedRead(x) - -#endif - -#else - -#define ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() // empty -#define ANNOTATE_IGNORE_READS_AND_WRITES_END() // empty -#define ANNOTATE_UNPROTECTED_READ(x) (x) - -#endif - -// ------------------------------------------------------------------------- -// Address sanitizer annotations - -#ifdef ADDRESS_SANITIZER -// Describe the current state of a contiguous container such as e.g. -// std::vector or std::string. For more details see -// sanitizer/common_interface_defs.h, which is provided by the compiler. -#include <sanitizer/common_interface_defs.h> - -#define ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) \ - __sanitizer_annotate_contiguous_container(beg, end, old_mid, new_mid) -#define ADDRESS_SANITIZER_REDZONE(name) \ - struct { \ - char x[8] __attribute__((aligned(8))); \ - } name - -#else - -#define ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) -#define ADDRESS_SANITIZER_REDZONE(name) static_assert(true, "") - -#endif // ADDRESS_SANITIZER - -// ------------------------------------------------------------------------- -// Undefine the macros intended only for this file. - -#undef ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED -#undef ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED -#undef ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED -#undef ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED -#undef ABSL_INTERNAL_ANNOTALYSIS_ENABLED -#undef ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED -#undef ABSL_INTERNAL_BEGIN_EXTERN_C -#undef ABSL_INTERNAL_END_EXTERN_C -#undef ABSL_INTERNAL_STATIC_INLINE - -#endif // ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/endian.h b/third_party/abseil_cpp/absl/base/internal/endian.h deleted file mode 100644 index 9677530e8d..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/endian.h +++ /dev/null @@ -1,266 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -#ifndef ABSL_BASE_INTERNAL_ENDIAN_H_ -#define ABSL_BASE_INTERNAL_ENDIAN_H_ - -// The following guarantees declaration of the byte swap functions -#ifdef _MSC_VER -#include <stdlib.h> // NOLINT(build/include) -#elif defined(__FreeBSD__) -#include <sys/endian.h> -#elif defined(__GLIBC__) -#include <byteswap.h> // IWYU pragma: export -#endif - -#include <cstdint> -#include "absl/base/config.h" -#include "absl/base/internal/unaligned_access.h" -#include "absl/base/port.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN - -// Use compiler byte-swapping intrinsics if they are available. 32-bit -// and 64-bit versions are available in Clang and GCC as of GCC 4.3.0. -// The 16-bit version is available in Clang and GCC only as of GCC 4.8.0. -// For simplicity, we enable them all only for GCC 4.8.0 or later. -#if defined(__clang__) || \ - (defined(__GNUC__) && \ - ((__GNUC__ == 4 && __GNUC_MINOR__ >= 8) || __GNUC__ >= 5)) -inline uint64_t gbswap_64(uint64_t host_int) { - return __builtin_bswap64(host_int); -} -inline uint32_t gbswap_32(uint32_t host_int) { - return __builtin_bswap32(host_int); -} -inline uint16_t gbswap_16(uint16_t host_int) { - return __builtin_bswap16(host_int); -} - -#elif defined(_MSC_VER) -inline uint64_t gbswap_64(uint64_t host_int) { - return _byteswap_uint64(host_int); -} -inline uint32_t gbswap_32(uint32_t host_int) { - return _byteswap_ulong(host_int); -} -inline uint16_t gbswap_16(uint16_t host_int) { - return _byteswap_ushort(host_int); -} - -#else -inline uint64_t gbswap_64(uint64_t host_int) { -#if defined(__GNUC__) && defined(__x86_64__) && !defined(__APPLE__) - // Adapted from /usr/include/byteswap.h. Not available on Mac. - if (__builtin_constant_p(host_int)) { - return __bswap_constant_64(host_int); - } else { - uint64_t result; - __asm__("bswap %0" : "=r"(result) : "0"(host_int)); - return result; - } -#elif defined(__GLIBC__) - return bswap_64(host_int); -#else - return (((host_int & uint64_t{0xFF}) << 56) | - ((host_int & uint64_t{0xFF00}) << 40) | - ((host_int & uint64_t{0xFF0000}) << 24) | - ((host_int & uint64_t{0xFF000000}) << 8) | - ((host_int & uint64_t{0xFF00000000}) >> 8) | - ((host_int & uint64_t{0xFF0000000000}) >> 24) | - ((host_int & uint64_t{0xFF000000000000}) >> 40) | - ((host_int & uint64_t{0xFF00000000000000}) >> 56)); -#endif // bswap_64 -} - -inline uint32_t gbswap_32(uint32_t host_int) { -#if defined(__GLIBC__) - return bswap_32(host_int); -#else - return (((host_int & uint32_t{0xFF}) << 24) | - ((host_int & uint32_t{0xFF00}) << 8) | - ((host_int & uint32_t{0xFF0000}) >> 8) | - ((host_int & uint32_t{0xFF000000}) >> 24)); -#endif -} - -inline uint16_t gbswap_16(uint16_t host_int) { -#if defined(__GLIBC__) - return bswap_16(host_int); -#else - return (((host_int & uint16_t{0xFF}) << 8) | - ((host_int & uint16_t{0xFF00}) >> 8)); -#endif -} - -#endif // intrinsics available - -#ifdef ABSL_IS_LITTLE_ENDIAN - -// Definitions for ntohl etc. that don't require us to include -// netinet/in.h. We wrap gbswap_32 and gbswap_16 in functions rather -// than just #defining them because in debug mode, gcc doesn't -// correctly handle the (rather involved) definitions of bswap_32. -// gcc guarantees that inline functions are as fast as macros, so -// this isn't a performance hit. -inline uint16_t ghtons(uint16_t x) { return gbswap_16(x); } -inline uint32_t ghtonl(uint32_t x) { return gbswap_32(x); } -inline uint64_t ghtonll(uint64_t x) { return gbswap_64(x); } - -#elif defined ABSL_IS_BIG_ENDIAN - -// These definitions are simpler on big-endian machines -// These are functions instead of macros to avoid self-assignment warnings -// on calls such as "i = ghtnol(i);". This also provides type checking. -inline uint16_t ghtons(uint16_t x) { return x; } -inline uint32_t ghtonl(uint32_t x) { return x; } -inline uint64_t ghtonll(uint64_t x) { return x; } - -#else -#error \ - "Unsupported byte order: Either ABSL_IS_BIG_ENDIAN or " \ - "ABSL_IS_LITTLE_ENDIAN must be defined" -#endif // byte order - -inline uint16_t gntohs(uint16_t x) { return ghtons(x); } -inline uint32_t gntohl(uint32_t x) { return ghtonl(x); } -inline uint64_t gntohll(uint64_t x) { return ghtonll(x); } - -// Utilities to convert numbers between the current hosts's native byte -// order and little-endian byte order -// -// Load/Store methods are alignment safe -namespace little_endian { -// Conversion functions. -#ifdef ABSL_IS_LITTLE_ENDIAN - -inline uint16_t FromHost16(uint16_t x) { return x; } -inline uint16_t ToHost16(uint16_t x) { return x; } - -inline uint32_t FromHost32(uint32_t x) { return x; } -inline uint32_t ToHost32(uint32_t x) { return x; } - -inline uint64_t FromHost64(uint64_t x) { return x; } -inline uint64_t ToHost64(uint64_t x) { return x; } - -inline constexpr bool IsLittleEndian() { return true; } - -#elif defined ABSL_IS_BIG_ENDIAN - -inline uint16_t FromHost16(uint16_t x) { return gbswap_16(x); } -inline uint16_t ToHost16(uint16_t x) { return gbswap_16(x); } - -inline uint32_t FromHost32(uint32_t x) { return gbswap_32(x); } -inline uint32_t ToHost32(uint32_t x) { return gbswap_32(x); } - -inline uint64_t FromHost64(uint64_t x) { return gbswap_64(x); } -inline uint64_t ToHost64(uint64_t x) { return gbswap_64(x); } - -inline constexpr bool IsLittleEndian() { return false; } - -#endif /* ENDIAN */ - -// Functions to do unaligned loads and stores in little-endian order. -inline uint16_t Load16(const void *p) { - return ToHost16(ABSL_INTERNAL_UNALIGNED_LOAD16(p)); -} - -inline void Store16(void *p, uint16_t v) { - ABSL_INTERNAL_UNALIGNED_STORE16(p, FromHost16(v)); -} - -inline uint32_t Load32(const void *p) { - return ToHost32(ABSL_INTERNAL_UNALIGNED_LOAD32(p)); -} - -inline void Store32(void *p, uint32_t v) { - ABSL_INTERNAL_UNALIGNED_STORE32(p, FromHost32(v)); -} - -inline uint64_t Load64(const void *p) { - return ToHost64(ABSL_INTERNAL_UNALIGNED_LOAD64(p)); -} - -inline void Store64(void *p, uint64_t v) { - ABSL_INTERNAL_UNALIGNED_STORE64(p, FromHost64(v)); -} - -} // namespace little_endian - -// Utilities to convert numbers between the current hosts's native byte -// order and big-endian byte order (same as network byte order) -// -// Load/Store methods are alignment safe -namespace big_endian { -#ifdef ABSL_IS_LITTLE_ENDIAN - -inline uint16_t FromHost16(uint16_t x) { return gbswap_16(x); } -inline uint16_t ToHost16(uint16_t x) { return gbswap_16(x); } - -inline uint32_t FromHost32(uint32_t x) { return gbswap_32(x); } -inline uint32_t ToHost32(uint32_t x) { return gbswap_32(x); } - -inline uint64_t FromHost64(uint64_t x) { return gbswap_64(x); } -inline uint64_t ToHost64(uint64_t x) { return gbswap_64(x); } - -inline constexpr bool IsLittleEndian() { return true; } - -#elif defined ABSL_IS_BIG_ENDIAN - -inline uint16_t FromHost16(uint16_t x) { return x; } -inline uint16_t ToHost16(uint16_t x) { return x; } - -inline uint32_t FromHost32(uint32_t x) { return x; } -inline uint32_t ToHost32(uint32_t x) { return x; } - -inline uint64_t FromHost64(uint64_t x) { return x; } -inline uint64_t ToHost64(uint64_t x) { return x; } - -inline constexpr bool IsLittleEndian() { return false; } - -#endif /* ENDIAN */ - -// Functions to do unaligned loads and stores in big-endian order. -inline uint16_t Load16(const void *p) { - return ToHost16(ABSL_INTERNAL_UNALIGNED_LOAD16(p)); -} - -inline void Store16(void *p, uint16_t v) { - ABSL_INTERNAL_UNALIGNED_STORE16(p, FromHost16(v)); -} - -inline uint32_t Load32(const void *p) { - return ToHost32(ABSL_INTERNAL_UNALIGNED_LOAD32(p)); -} - -inline void Store32(void *p, uint32_t v) { - ABSL_INTERNAL_UNALIGNED_STORE32(p, FromHost32(v)); -} - -inline uint64_t Load64(const void *p) { - return ToHost64(ABSL_INTERNAL_UNALIGNED_LOAD64(p)); -} - -inline void Store64(void *p, uint64_t v) { - ABSL_INTERNAL_UNALIGNED_STORE64(p, FromHost64(v)); -} - -} // namespace big_endian - -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_ENDIAN_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/endian_test.cc b/third_party/abseil_cpp/absl/base/internal/endian_test.cc deleted file mode 100644 index a1691b1f82..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/endian_test.cc +++ /dev/null @@ -1,263 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/endian.h" - -#include <algorithm> -#include <cstdint> -#include <limits> -#include <random> -#include <vector> - -#include "gtest/gtest.h" -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace { - -const uint64_t kInitialNumber{0x0123456789abcdef}; -const uint64_t k64Value{kInitialNumber}; -const uint32_t k32Value{0x01234567}; -const uint16_t k16Value{0x0123}; -const int kNumValuesToTest = 1000000; -const int kRandomSeed = 12345; - -#if defined(ABSL_IS_BIG_ENDIAN) -const uint64_t kInitialInNetworkOrder{kInitialNumber}; -const uint64_t k64ValueLE{0xefcdab8967452301}; -const uint32_t k32ValueLE{0x67452301}; -const uint16_t k16ValueLE{0x2301}; - -const uint64_t k64ValueBE{kInitialNumber}; -const uint32_t k32ValueBE{k32Value}; -const uint16_t k16ValueBE{k16Value}; -#elif defined(ABSL_IS_LITTLE_ENDIAN) -const uint64_t kInitialInNetworkOrder{0xefcdab8967452301}; -const uint64_t k64ValueLE{kInitialNumber}; -const uint32_t k32ValueLE{k32Value}; -const uint16_t k16ValueLE{k16Value}; - -const uint64_t k64ValueBE{0xefcdab8967452301}; -const uint32_t k32ValueBE{0x67452301}; -const uint16_t k16ValueBE{0x2301}; -#endif - -std::vector<uint16_t> GenerateAllUint16Values() { - std::vector<uint16_t> result; - result.reserve(size_t{1} << (sizeof(uint16_t) * 8)); - for (uint32_t i = std::numeric_limits<uint16_t>::min(); - i <= std::numeric_limits<uint16_t>::max(); ++i) { - result.push_back(static_cast<uint16_t>(i)); - } - return result; -} - -template<typename T> -std::vector<T> GenerateRandomIntegers(size_t num_values_to_test) { - std::vector<T> result; - result.reserve(num_values_to_test); - std::mt19937_64 rng(kRandomSeed); - for (size_t i = 0; i < num_values_to_test; ++i) { - result.push_back(rng()); - } - return result; -} - -void ManualByteSwap(char* bytes, int length) { - if (length == 1) - return; - - EXPECT_EQ(0, length % 2); - for (int i = 0; i < length / 2; ++i) { - int j = (length - 1) - i; - using std::swap; - swap(bytes[i], bytes[j]); - } -} - -template<typename T> -inline T UnalignedLoad(const char* p) { - static_assert( - sizeof(T) == 1 || sizeof(T) == 2 || sizeof(T) == 4 || sizeof(T) == 8, - "Unexpected type size"); - - switch (sizeof(T)) { - case 1: return *reinterpret_cast<const T*>(p); - case 2: - return ABSL_INTERNAL_UNALIGNED_LOAD16(p); - case 4: - return ABSL_INTERNAL_UNALIGNED_LOAD32(p); - case 8: - return ABSL_INTERNAL_UNALIGNED_LOAD64(p); - default: - // Suppresses invalid "not all control paths return a value" on MSVC - return {}; - } -} - -template <typename T, typename ByteSwapper> -static void GBSwapHelper(const std::vector<T>& host_values_to_test, - const ByteSwapper& byte_swapper) { - // Test byte_swapper against a manual byte swap. - for (typename std::vector<T>::const_iterator it = host_values_to_test.begin(); - it != host_values_to_test.end(); ++it) { - T host_value = *it; - - char actual_value[sizeof(host_value)]; - memcpy(actual_value, &host_value, sizeof(host_value)); - byte_swapper(actual_value); - - char expected_value[sizeof(host_value)]; - memcpy(expected_value, &host_value, sizeof(host_value)); - ManualByteSwap(expected_value, sizeof(host_value)); - - ASSERT_EQ(0, memcmp(actual_value, expected_value, sizeof(host_value))) - << "Swap output for 0x" << std::hex << host_value << " does not match. " - << "Expected: 0x" << UnalignedLoad<T>(expected_value) << "; " - << "actual: 0x" << UnalignedLoad<T>(actual_value); - } -} - -void Swap16(char* bytes) { - ABSL_INTERNAL_UNALIGNED_STORE16( - bytes, gbswap_16(ABSL_INTERNAL_UNALIGNED_LOAD16(bytes))); -} - -void Swap32(char* bytes) { - ABSL_INTERNAL_UNALIGNED_STORE32( - bytes, gbswap_32(ABSL_INTERNAL_UNALIGNED_LOAD32(bytes))); -} - -void Swap64(char* bytes) { - ABSL_INTERNAL_UNALIGNED_STORE64( - bytes, gbswap_64(ABSL_INTERNAL_UNALIGNED_LOAD64(bytes))); -} - -TEST(EndianessTest, Uint16) { - GBSwapHelper(GenerateAllUint16Values(), &Swap16); -} - -TEST(EndianessTest, Uint32) { - GBSwapHelper(GenerateRandomIntegers<uint32_t>(kNumValuesToTest), &Swap32); -} - -TEST(EndianessTest, Uint64) { - GBSwapHelper(GenerateRandomIntegers<uint64_t>(kNumValuesToTest), &Swap64); -} - -TEST(EndianessTest, ghtonll_gntohll) { - // Test that absl::ghtonl compiles correctly - uint32_t test = 0x01234567; - EXPECT_EQ(absl::gntohl(absl::ghtonl(test)), test); - - uint64_t comp = absl::ghtonll(kInitialNumber); - EXPECT_EQ(comp, kInitialInNetworkOrder); - comp = absl::gntohll(kInitialInNetworkOrder); - EXPECT_EQ(comp, kInitialNumber); - - // Test that htonll and ntohll are each others' inverse functions on a - // somewhat assorted batch of numbers. 37 is chosen to not be anything - // particularly nice base 2. - uint64_t value = 1; - for (int i = 0; i < 100; ++i) { - comp = absl::ghtonll(absl::gntohll(value)); - EXPECT_EQ(value, comp); - comp = absl::gntohll(absl::ghtonll(value)); - EXPECT_EQ(value, comp); - value *= 37; - } -} - -TEST(EndianessTest, little_endian) { - // Check little_endian uint16_t. - uint64_t comp = little_endian::FromHost16(k16Value); - EXPECT_EQ(comp, k16ValueLE); - comp = little_endian::ToHost16(k16ValueLE); - EXPECT_EQ(comp, k16Value); - - // Check little_endian uint32_t. - comp = little_endian::FromHost32(k32Value); - EXPECT_EQ(comp, k32ValueLE); - comp = little_endian::ToHost32(k32ValueLE); - EXPECT_EQ(comp, k32Value); - - // Check little_endian uint64_t. - comp = little_endian::FromHost64(k64Value); - EXPECT_EQ(comp, k64ValueLE); - comp = little_endian::ToHost64(k64ValueLE); - EXPECT_EQ(comp, k64Value); - - // Check little-endian Load and store functions. - uint16_t u16Buf; - uint32_t u32Buf; - uint64_t u64Buf; - - little_endian::Store16(&u16Buf, k16Value); - EXPECT_EQ(u16Buf, k16ValueLE); - comp = little_endian::Load16(&u16Buf); - EXPECT_EQ(comp, k16Value); - - little_endian::Store32(&u32Buf, k32Value); - EXPECT_EQ(u32Buf, k32ValueLE); - comp = little_endian::Load32(&u32Buf); - EXPECT_EQ(comp, k32Value); - - little_endian::Store64(&u64Buf, k64Value); - EXPECT_EQ(u64Buf, k64ValueLE); - comp = little_endian::Load64(&u64Buf); - EXPECT_EQ(comp, k64Value); -} - -TEST(EndianessTest, big_endian) { - // Check big-endian Load and store functions. - uint16_t u16Buf; - uint32_t u32Buf; - uint64_t u64Buf; - - unsigned char buffer[10]; - big_endian::Store16(&u16Buf, k16Value); - EXPECT_EQ(u16Buf, k16ValueBE); - uint64_t comp = big_endian::Load16(&u16Buf); - EXPECT_EQ(comp, k16Value); - - big_endian::Store32(&u32Buf, k32Value); - EXPECT_EQ(u32Buf, k32ValueBE); - comp = big_endian::Load32(&u32Buf); - EXPECT_EQ(comp, k32Value); - - big_endian::Store64(&u64Buf, k64Value); - EXPECT_EQ(u64Buf, k64ValueBE); - comp = big_endian::Load64(&u64Buf); - EXPECT_EQ(comp, k64Value); - - big_endian::Store16(buffer + 1, k16Value); - EXPECT_EQ(u16Buf, k16ValueBE); - comp = big_endian::Load16(buffer + 1); - EXPECT_EQ(comp, k16Value); - - big_endian::Store32(buffer + 1, k32Value); - EXPECT_EQ(u32Buf, k32ValueBE); - comp = big_endian::Load32(buffer + 1); - EXPECT_EQ(comp, k32Value); - - big_endian::Store64(buffer + 1, k64Value); - EXPECT_EQ(u64Buf, k64ValueBE); - comp = big_endian::Load64(buffer + 1); - EXPECT_EQ(comp, k64Value); -} - -} // namespace -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/errno_saver.h b/third_party/abseil_cpp/absl/base/internal/errno_saver.h deleted file mode 100644 index 251de510fc..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/errno_saver.h +++ /dev/null @@ -1,43 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_ERRNO_SAVER_H_ -#define ABSL_BASE_INTERNAL_ERRNO_SAVER_H_ - -#include <cerrno> - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// `ErrnoSaver` captures the value of `errno` upon construction and restores it -// upon deletion. It is used in low-level code and must be super fast. Do not -// add instrumentation, even in debug modes. -class ErrnoSaver { - public: - ErrnoSaver() : saved_errno_(errno) {} - ~ErrnoSaver() { errno = saved_errno_; } - int operator()() const { return saved_errno_; } - - private: - const int saved_errno_; -}; - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_ERRNO_SAVER_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/errno_saver_test.cc b/third_party/abseil_cpp/absl/base/internal/errno_saver_test.cc deleted file mode 100644 index e9b742c588..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/errno_saver_test.cc +++ /dev/null @@ -1,45 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/errno_saver.h" - -#include <cerrno> - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/base/internal/strerror.h" - -namespace { -using ::testing::Eq; - -struct ErrnoPrinter { - int no; -}; -std::ostream &operator<<(std::ostream &os, ErrnoPrinter ep) { - return os << absl::base_internal::StrError(ep.no) << " [" << ep.no << "]"; -} -bool operator==(ErrnoPrinter one, ErrnoPrinter two) { return one.no == two.no; } - -TEST(ErrnoSaverTest, Works) { - errno = EDOM; - { - absl::base_internal::ErrnoSaver errno_saver; - EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{EDOM})); - errno = ERANGE; - EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{ERANGE})); - EXPECT_THAT(ErrnoPrinter{errno_saver()}, Eq(ErrnoPrinter{EDOM})); - } - EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{EDOM})); -} -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/exception_safety_testing.cc b/third_party/abseil_cpp/absl/base/internal/exception_safety_testing.cc deleted file mode 100644 index 6ccac41864..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/exception_safety_testing.cc +++ /dev/null @@ -1,79 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/exception_safety_testing.h" - -#ifdef ABSL_HAVE_EXCEPTIONS - -#include "gtest/gtest.h" -#include "absl/meta/type_traits.h" - -namespace testing { - -exceptions_internal::NoThrowTag nothrow_ctor; - -exceptions_internal::StrongGuaranteeTagType strong_guarantee; - -exceptions_internal::ExceptionSafetyTestBuilder<> MakeExceptionSafetyTester() { - return {}; -} - -namespace exceptions_internal { - -int countdown = -1; - -ConstructorTracker* ConstructorTracker::current_tracker_instance_ = nullptr; - -void MaybeThrow(absl::string_view msg, bool throw_bad_alloc) { - if (countdown-- == 0) { - if (throw_bad_alloc) throw TestBadAllocException(msg); - throw TestException(msg); - } -} - -testing::AssertionResult FailureMessage(const TestException& e, - int countdown) noexcept { - return testing::AssertionFailure() << "Exception thrown from " << e.what(); -} - -std::string GetSpecString(TypeSpec spec) { - std::string out; - absl::string_view sep; - const auto append = [&](absl::string_view s) { - absl::StrAppend(&out, sep, s); - sep = " | "; - }; - if (static_cast<bool>(TypeSpec::kNoThrowCopy & spec)) { - append("kNoThrowCopy"); - } - if (static_cast<bool>(TypeSpec::kNoThrowMove & spec)) { - append("kNoThrowMove"); - } - if (static_cast<bool>(TypeSpec::kNoThrowNew & spec)) { - append("kNoThrowNew"); - } - return out; -} - -std::string GetSpecString(AllocSpec spec) { - return static_cast<bool>(AllocSpec::kNoThrowAllocate & spec) - ? "kNoThrowAllocate" - : ""; -} - -} // namespace exceptions_internal - -} // namespace testing - -#endif // ABSL_HAVE_EXCEPTIONS diff --git a/third_party/abseil_cpp/absl/base/internal/exception_safety_testing.h b/third_party/abseil_cpp/absl/base/internal/exception_safety_testing.h deleted file mode 100644 index 6ba89d05df..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/exception_safety_testing.h +++ /dev/null @@ -1,1101 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Utilities for testing exception-safety - -#ifndef ABSL_BASE_INTERNAL_EXCEPTION_SAFETY_TESTING_H_ -#define ABSL_BASE_INTERNAL_EXCEPTION_SAFETY_TESTING_H_ - -#include "absl/base/config.h" - -#ifdef ABSL_HAVE_EXCEPTIONS - -#include <cstddef> -#include <cstdint> -#include <functional> -#include <initializer_list> -#include <iosfwd> -#include <string> -#include <tuple> -#include <unordered_map> - -#include "gtest/gtest.h" -#include "absl/base/internal/pretty_function.h" -#include "absl/memory/memory.h" -#include "absl/meta/type_traits.h" -#include "absl/strings/string_view.h" -#include "absl/strings/substitute.h" -#include "absl/utility/utility.h" - -namespace testing { - -enum class TypeSpec; -enum class AllocSpec; - -constexpr TypeSpec operator|(TypeSpec a, TypeSpec b) { - using T = absl::underlying_type_t<TypeSpec>; - return static_cast<TypeSpec>(static_cast<T>(a) | static_cast<T>(b)); -} - -constexpr TypeSpec operator&(TypeSpec a, TypeSpec b) { - using T = absl::underlying_type_t<TypeSpec>; - return static_cast<TypeSpec>(static_cast<T>(a) & static_cast<T>(b)); -} - -constexpr AllocSpec operator|(AllocSpec a, AllocSpec b) { - using T = absl::underlying_type_t<AllocSpec>; - return static_cast<AllocSpec>(static_cast<T>(a) | static_cast<T>(b)); -} - -constexpr AllocSpec operator&(AllocSpec a, AllocSpec b) { - using T = absl::underlying_type_t<AllocSpec>; - return static_cast<AllocSpec>(static_cast<T>(a) & static_cast<T>(b)); -} - -namespace exceptions_internal { - -std::string GetSpecString(TypeSpec); -std::string GetSpecString(AllocSpec); - -struct NoThrowTag {}; -struct StrongGuaranteeTagType {}; - -// A simple exception class. We throw this so that test code can catch -// exceptions specifically thrown by ThrowingValue. -class TestException { - public: - explicit TestException(absl::string_view msg) : msg_(msg) {} - virtual ~TestException() {} - virtual const char* what() const noexcept { return msg_.c_str(); } - - private: - std::string msg_; -}; - -// TestBadAllocException exists because allocation functions must throw an -// exception which can be caught by a handler of std::bad_alloc. We use a child -// class of std::bad_alloc so we can customise the error message, and also -// derive from TestException so we don't accidentally end up catching an actual -// bad_alloc exception in TestExceptionSafety. -class TestBadAllocException : public std::bad_alloc, public TestException { - public: - explicit TestBadAllocException(absl::string_view msg) : TestException(msg) {} - using TestException::what; -}; - -extern int countdown; - -// Allows the countdown variable to be set manually (defaulting to the initial -// value of 0) -inline void SetCountdown(int i = 0) { countdown = i; } -// Sets the countdown to the terminal value -1 -inline void UnsetCountdown() { SetCountdown(-1); } - -void MaybeThrow(absl::string_view msg, bool throw_bad_alloc = false); - -testing::AssertionResult FailureMessage(const TestException& e, - int countdown) noexcept; - -struct TrackedAddress { - bool is_alive; - std::string description; -}; - -// Inspects the constructions and destructions of anything inheriting from -// TrackedObject. This allows us to safely "leak" TrackedObjects, as -// ConstructorTracker will destroy everything left over in its destructor. -class ConstructorTracker { - public: - explicit ConstructorTracker(int count) : countdown_(count) { - assert(current_tracker_instance_ == nullptr); - current_tracker_instance_ = this; - } - - ~ConstructorTracker() { - assert(current_tracker_instance_ == this); - current_tracker_instance_ = nullptr; - - for (auto& it : address_map_) { - void* address = it.first; - TrackedAddress& tracked_address = it.second; - if (tracked_address.is_alive) { - ADD_FAILURE() << ErrorMessage(address, tracked_address.description, - countdown_, "Object was not destroyed."); - } - } - } - - static void ObjectConstructed(void* address, std::string description) { - if (!CurrentlyTracking()) return; - - TrackedAddress& tracked_address = - current_tracker_instance_->address_map_[address]; - if (tracked_address.is_alive) { - ADD_FAILURE() << ErrorMessage( - address, tracked_address.description, - current_tracker_instance_->countdown_, - "Object was re-constructed. Current object was constructed by " + - description); - } - tracked_address = {true, std::move(description)}; - } - - static void ObjectDestructed(void* address) { - if (!CurrentlyTracking()) return; - - auto it = current_tracker_instance_->address_map_.find(address); - // Not tracked. Ignore. - if (it == current_tracker_instance_->address_map_.end()) return; - - TrackedAddress& tracked_address = it->second; - if (!tracked_address.is_alive) { - ADD_FAILURE() << ErrorMessage(address, tracked_address.description, - current_tracker_instance_->countdown_, - "Object was re-destroyed."); - } - tracked_address.is_alive = false; - } - - private: - static bool CurrentlyTracking() { - return current_tracker_instance_ != nullptr; - } - - static std::string ErrorMessage(void* address, - const std::string& address_description, - int countdown, - const std::string& error_description) { - return absl::Substitute( - "With coundtown at $0:\n" - " $1\n" - " Object originally constructed by $2\n" - " Object address: $3\n", - countdown, error_description, address_description, address); - } - - std::unordered_map<void*, TrackedAddress> address_map_; - int countdown_; - - static ConstructorTracker* current_tracker_instance_; -}; - -class TrackedObject { - public: - TrackedObject(const TrackedObject&) = delete; - TrackedObject(TrackedObject&&) = delete; - - protected: - explicit TrackedObject(std::string description) { - ConstructorTracker::ObjectConstructed(this, std::move(description)); - } - - ~TrackedObject() noexcept { ConstructorTracker::ObjectDestructed(this); } -}; -} // namespace exceptions_internal - -extern exceptions_internal::NoThrowTag nothrow_ctor; - -extern exceptions_internal::StrongGuaranteeTagType strong_guarantee; - -// A test class which is convertible to bool. The conversion can be -// instrumented to throw at a controlled time. -class ThrowingBool { - public: - ThrowingBool(bool b) noexcept : b_(b) {} // NOLINT(runtime/explicit) - operator bool() const { // NOLINT - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return b_; - } - - private: - bool b_; -}; - -/* - * Configuration enum for the ThrowingValue type that defines behavior for the - * lifetime of the instance. Use testing::nothrow_ctor to prevent the integer - * constructor from throwing. - * - * kEverythingThrows: Every operation can throw an exception - * kNoThrowCopy: Copy construction and copy assignment will not throw - * kNoThrowMove: Move construction and move assignment will not throw - * kNoThrowNew: Overloaded operators new and new[] will not throw - */ -enum class TypeSpec { - kEverythingThrows = 0, - kNoThrowCopy = 1, - kNoThrowMove = 1 << 1, - kNoThrowNew = 1 << 2, -}; - -/* - * A testing class instrumented to throw an exception at a controlled time. - * - * ThrowingValue implements a slightly relaxed version of the Regular concept -- - * that is it's a value type with the expected semantics. It also implements - * arithmetic operations. It doesn't implement member and pointer operators - * like operator-> or operator[]. - * - * ThrowingValue can be instrumented to have certain operations be noexcept by - * using compile-time bitfield template arguments. That is, to make an - * ThrowingValue which has noexcept move construction/assignment and noexcept - * copy construction/assignment, use the following: - * ThrowingValue<testing::kNoThrowMove | testing::kNoThrowCopy> my_thrwr{val}; - */ -template <TypeSpec Spec = TypeSpec::kEverythingThrows> -class ThrowingValue : private exceptions_internal::TrackedObject { - static constexpr bool IsSpecified(TypeSpec spec) { - return static_cast<bool>(Spec & spec); - } - - static constexpr int kDefaultValue = 0; - static constexpr int kBadValue = 938550620; - - public: - ThrowingValue() : TrackedObject(GetInstanceString(kDefaultValue)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ = kDefaultValue; - } - - ThrowingValue(const ThrowingValue& other) noexcept( - IsSpecified(TypeSpec::kNoThrowCopy)) - : TrackedObject(GetInstanceString(other.dummy_)) { - if (!IsSpecified(TypeSpec::kNoThrowCopy)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - } - dummy_ = other.dummy_; - } - - ThrowingValue(ThrowingValue&& other) noexcept( - IsSpecified(TypeSpec::kNoThrowMove)) - : TrackedObject(GetInstanceString(other.dummy_)) { - if (!IsSpecified(TypeSpec::kNoThrowMove)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - } - dummy_ = other.dummy_; - } - - explicit ThrowingValue(int i) : TrackedObject(GetInstanceString(i)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ = i; - } - - ThrowingValue(int i, exceptions_internal::NoThrowTag) noexcept - : TrackedObject(GetInstanceString(i)), dummy_(i) {} - - // absl expects nothrow destructors - ~ThrowingValue() noexcept = default; - - ThrowingValue& operator=(const ThrowingValue& other) noexcept( - IsSpecified(TypeSpec::kNoThrowCopy)) { - dummy_ = kBadValue; - if (!IsSpecified(TypeSpec::kNoThrowCopy)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - } - dummy_ = other.dummy_; - return *this; - } - - ThrowingValue& operator=(ThrowingValue&& other) noexcept( - IsSpecified(TypeSpec::kNoThrowMove)) { - dummy_ = kBadValue; - if (!IsSpecified(TypeSpec::kNoThrowMove)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - } - dummy_ = other.dummy_; - return *this; - } - - // Arithmetic Operators - ThrowingValue operator+(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ + other.dummy_, nothrow_ctor); - } - - ThrowingValue operator+() const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_, nothrow_ctor); - } - - ThrowingValue operator-(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ - other.dummy_, nothrow_ctor); - } - - ThrowingValue operator-() const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(-dummy_, nothrow_ctor); - } - - ThrowingValue& operator++() { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - ++dummy_; - return *this; - } - - ThrowingValue operator++(int) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - auto out = ThrowingValue(dummy_, nothrow_ctor); - ++dummy_; - return out; - } - - ThrowingValue& operator--() { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - --dummy_; - return *this; - } - - ThrowingValue operator--(int) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - auto out = ThrowingValue(dummy_, nothrow_ctor); - --dummy_; - return out; - } - - ThrowingValue operator*(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ * other.dummy_, nothrow_ctor); - } - - ThrowingValue operator/(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ / other.dummy_, nothrow_ctor); - } - - ThrowingValue operator%(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ % other.dummy_, nothrow_ctor); - } - - ThrowingValue operator<<(int shift) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ << shift, nothrow_ctor); - } - - ThrowingValue operator>>(int shift) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ >> shift, nothrow_ctor); - } - - // Comparison Operators - // NOTE: We use `ThrowingBool` instead of `bool` because most STL - // types/containers requires T to be convertible to bool. - friend ThrowingBool operator==(const ThrowingValue& a, - const ThrowingValue& b) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return a.dummy_ == b.dummy_; - } - friend ThrowingBool operator!=(const ThrowingValue& a, - const ThrowingValue& b) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return a.dummy_ != b.dummy_; - } - friend ThrowingBool operator<(const ThrowingValue& a, - const ThrowingValue& b) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return a.dummy_ < b.dummy_; - } - friend ThrowingBool operator<=(const ThrowingValue& a, - const ThrowingValue& b) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return a.dummy_ <= b.dummy_; - } - friend ThrowingBool operator>(const ThrowingValue& a, - const ThrowingValue& b) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return a.dummy_ > b.dummy_; - } - friend ThrowingBool operator>=(const ThrowingValue& a, - const ThrowingValue& b) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return a.dummy_ >= b.dummy_; - } - - // Logical Operators - ThrowingBool operator!() const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return !dummy_; - } - - ThrowingBool operator&&(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return dummy_ && other.dummy_; - } - - ThrowingBool operator||(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return dummy_ || other.dummy_; - } - - // Bitwise Logical Operators - ThrowingValue operator~() const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(~dummy_, nothrow_ctor); - } - - ThrowingValue operator&(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ & other.dummy_, nothrow_ctor); - } - - ThrowingValue operator|(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ | other.dummy_, nothrow_ctor); - } - - ThrowingValue operator^(const ThrowingValue& other) const { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return ThrowingValue(dummy_ ^ other.dummy_, nothrow_ctor); - } - - // Compound Assignment operators - ThrowingValue& operator+=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ += other.dummy_; - return *this; - } - - ThrowingValue& operator-=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ -= other.dummy_; - return *this; - } - - ThrowingValue& operator*=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ *= other.dummy_; - return *this; - } - - ThrowingValue& operator/=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ /= other.dummy_; - return *this; - } - - ThrowingValue& operator%=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ %= other.dummy_; - return *this; - } - - ThrowingValue& operator&=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ &= other.dummy_; - return *this; - } - - ThrowingValue& operator|=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ |= other.dummy_; - return *this; - } - - ThrowingValue& operator^=(const ThrowingValue& other) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ ^= other.dummy_; - return *this; - } - - ThrowingValue& operator<<=(int shift) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ <<= shift; - return *this; - } - - ThrowingValue& operator>>=(int shift) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ >>= shift; - return *this; - } - - // Pointer operators - void operator&() const = delete; // NOLINT(runtime/operator) - - // Stream operators - friend std::ostream& operator<<(std::ostream& os, const ThrowingValue& tv) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return os << GetInstanceString(tv.dummy_); - } - - friend std::istream& operator>>(std::istream& is, const ThrowingValue&) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - return is; - } - - // Memory management operators - // Args.. allows us to overload regular and placement new in one shot - template <typename... Args> - static void* operator new(size_t s, Args&&... args) noexcept( - IsSpecified(TypeSpec::kNoThrowNew)) { - if (!IsSpecified(TypeSpec::kNoThrowNew)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION, true); - } - return ::operator new(s, std::forward<Args>(args)...); - } - - template <typename... Args> - static void* operator new[](size_t s, Args&&... args) noexcept( - IsSpecified(TypeSpec::kNoThrowNew)) { - if (!IsSpecified(TypeSpec::kNoThrowNew)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION, true); - } - return ::operator new[](s, std::forward<Args>(args)...); - } - - // Abseil doesn't support throwing overloaded operator delete. These are - // provided so a throwing operator-new can clean up after itself. - // - // We provide both regular and templated operator delete because if only the - // templated version is provided as we did with operator new, the compiler has - // no way of knowing which overload of operator delete to call. See - // https://en.cppreference.com/w/cpp/memory/new/operator_delete and - // https://en.cppreference.com/w/cpp/language/delete for the gory details. - void operator delete(void* p) noexcept { ::operator delete(p); } - - template <typename... Args> - void operator delete(void* p, Args&&... args) noexcept { - ::operator delete(p, std::forward<Args>(args)...); - } - - void operator delete[](void* p) noexcept { return ::operator delete[](p); } - - template <typename... Args> - void operator delete[](void* p, Args&&... args) noexcept { - return ::operator delete[](p, std::forward<Args>(args)...); - } - - // Non-standard access to the actual contained value. No need for this to - // throw. - int& Get() noexcept { return dummy_; } - const int& Get() const noexcept { return dummy_; } - - private: - static std::string GetInstanceString(int dummy) { - return absl::StrCat("ThrowingValue<", - exceptions_internal::GetSpecString(Spec), ">(", dummy, - ")"); - } - - int dummy_; -}; -// While not having to do with exceptions, explicitly delete comma operator, to -// make sure we don't use it on user-supplied types. -template <TypeSpec Spec, typename T> -void operator,(const ThrowingValue<Spec>&, T&&) = delete; -template <TypeSpec Spec, typename T> -void operator,(T&&, const ThrowingValue<Spec>&) = delete; - -/* - * Configuration enum for the ThrowingAllocator type that defines behavior for - * the lifetime of the instance. - * - * kEverythingThrows: Calls to the member functions may throw - * kNoThrowAllocate: Calls to the member functions will not throw - */ -enum class AllocSpec { - kEverythingThrows = 0, - kNoThrowAllocate = 1, -}; - -/* - * An allocator type which is instrumented to throw at a controlled time, or not - * to throw, using AllocSpec. The supported settings are the default of every - * function which is allowed to throw in a conforming allocator possibly - * throwing, or nothing throws, in line with the ABSL_ALLOCATOR_THROWS - * configuration macro. - */ -template <typename T, AllocSpec Spec = AllocSpec::kEverythingThrows> -class ThrowingAllocator : private exceptions_internal::TrackedObject { - static constexpr bool IsSpecified(AllocSpec spec) { - return static_cast<bool>(Spec & spec); - } - - public: - using pointer = T*; - using const_pointer = const T*; - using reference = T&; - using const_reference = const T&; - using void_pointer = void*; - using const_void_pointer = const void*; - using value_type = T; - using size_type = size_t; - using difference_type = ptrdiff_t; - - using is_nothrow = - std::integral_constant<bool, Spec == AllocSpec::kNoThrowAllocate>; - using propagate_on_container_copy_assignment = std::true_type; - using propagate_on_container_move_assignment = std::true_type; - using propagate_on_container_swap = std::true_type; - using is_always_equal = std::false_type; - - ThrowingAllocator() : TrackedObject(GetInstanceString(next_id_)) { - exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION); - dummy_ = std::make_shared<const int>(next_id_++); - } - - template <typename U> - ThrowingAllocator(const ThrowingAllocator<U, Spec>& other) noexcept // NOLINT - : TrackedObject(GetInstanceString(*other.State())), - dummy_(other.State()) {} - - // According to C++11 standard [17.6.3.5], Table 28, the move/copy ctors of - // allocator shall not exit via an exception, thus they are marked noexcept. - ThrowingAllocator(const ThrowingAllocator& other) noexcept - : TrackedObject(GetInstanceString(*other.State())), - dummy_(other.State()) {} - - template <typename U> - ThrowingAllocator(ThrowingAllocator<U, Spec>&& other) noexcept // NOLINT - : TrackedObject(GetInstanceString(*other.State())), - dummy_(std::move(other.State())) {} - - ThrowingAllocator(ThrowingAllocator&& other) noexcept - : TrackedObject(GetInstanceString(*other.State())), - dummy_(std::move(other.State())) {} - - ~ThrowingAllocator() noexcept = default; - - ThrowingAllocator& operator=(const ThrowingAllocator& other) noexcept { - dummy_ = other.State(); - return *this; - } - - template <typename U> - ThrowingAllocator& operator=( - const ThrowingAllocator<U, Spec>& other) noexcept { - dummy_ = other.State(); - return *this; - } - - template <typename U> - ThrowingAllocator& operator=(ThrowingAllocator<U, Spec>&& other) noexcept { - dummy_ = std::move(other.State()); - return *this; - } - - template <typename U> - struct rebind { - using other = ThrowingAllocator<U, Spec>; - }; - - pointer allocate(size_type n) noexcept( - IsSpecified(AllocSpec::kNoThrowAllocate)) { - ReadStateAndMaybeThrow(ABSL_PRETTY_FUNCTION); - return static_cast<pointer>(::operator new(n * sizeof(T))); - } - - pointer allocate(size_type n, const_void_pointer) noexcept( - IsSpecified(AllocSpec::kNoThrowAllocate)) { - return allocate(n); - } - - void deallocate(pointer ptr, size_type) noexcept { - ReadState(); - ::operator delete(static_cast<void*>(ptr)); - } - - template <typename U, typename... Args> - void construct(U* ptr, Args&&... args) noexcept( - IsSpecified(AllocSpec::kNoThrowAllocate)) { - ReadStateAndMaybeThrow(ABSL_PRETTY_FUNCTION); - ::new (static_cast<void*>(ptr)) U(std::forward<Args>(args)...); - } - - template <typename U> - void destroy(U* p) noexcept { - ReadState(); - p->~U(); - } - - size_type max_size() const noexcept { - return (std::numeric_limits<difference_type>::max)() / sizeof(value_type); - } - - ThrowingAllocator select_on_container_copy_construction() noexcept( - IsSpecified(AllocSpec::kNoThrowAllocate)) { - auto& out = *this; - ReadStateAndMaybeThrow(ABSL_PRETTY_FUNCTION); - return out; - } - - template <typename U> - bool operator==(const ThrowingAllocator<U, Spec>& other) const noexcept { - return dummy_ == other.dummy_; - } - - template <typename U> - bool operator!=(const ThrowingAllocator<U, Spec>& other) const noexcept { - return dummy_ != other.dummy_; - } - - template <typename, AllocSpec> - friend class ThrowingAllocator; - - private: - static std::string GetInstanceString(int dummy) { - return absl::StrCat("ThrowingAllocator<", - exceptions_internal::GetSpecString(Spec), ">(", dummy, - ")"); - } - - const std::shared_ptr<const int>& State() const { return dummy_; } - std::shared_ptr<const int>& State() { return dummy_; } - - void ReadState() { - // we know that this will never be true, but the compiler doesn't, so this - // should safely force a read of the value. - if (*dummy_ < 0) std::abort(); - } - - void ReadStateAndMaybeThrow(absl::string_view msg) const { - if (!IsSpecified(AllocSpec::kNoThrowAllocate)) { - exceptions_internal::MaybeThrow( - absl::Substitute("Allocator id $0 threw from $1", *dummy_, msg)); - } - } - - static int next_id_; - std::shared_ptr<const int> dummy_; -}; - -template <typename T, AllocSpec Spec> -int ThrowingAllocator<T, Spec>::next_id_ = 0; - -// Tests for resource leaks by attempting to construct a T using args repeatedly -// until successful, using the countdown method. Side effects can then be -// tested for resource leaks. -template <typename T, typename... Args> -void TestThrowingCtor(Args&&... args) { - struct Cleanup { - ~Cleanup() { exceptions_internal::UnsetCountdown(); } - } c; - for (int count = 0;; ++count) { - exceptions_internal::ConstructorTracker ct(count); - exceptions_internal::SetCountdown(count); - try { - T temp(std::forward<Args>(args)...); - static_cast<void>(temp); - break; - } catch (const exceptions_internal::TestException&) { - } - } -} - -// Tests the nothrow guarantee of the provided nullary operation. If the an -// exception is thrown, the result will be AssertionFailure(). Otherwise, it -// will be AssertionSuccess(). -template <typename Operation> -testing::AssertionResult TestNothrowOp(const Operation& operation) { - struct Cleanup { - Cleanup() { exceptions_internal::SetCountdown(); } - ~Cleanup() { exceptions_internal::UnsetCountdown(); } - } c; - try { - operation(); - return testing::AssertionSuccess(); - } catch (const exceptions_internal::TestException&) { - return testing::AssertionFailure() - << "TestException thrown during call to operation() when nothrow " - "guarantee was expected."; - } catch (...) { - return testing::AssertionFailure() - << "Unknown exception thrown during call to operation() when " - "nothrow guarantee was expected."; - } -} - -namespace exceptions_internal { - -// Dummy struct for ExceptionSafetyTestBuilder<> partial state. -struct UninitializedT {}; - -template <typename T> -class DefaultFactory { - public: - explicit DefaultFactory(const T& t) : t_(t) {} - std::unique_ptr<T> operator()() const { return absl::make_unique<T>(t_); } - - private: - T t_; -}; - -template <size_t LazyContractsCount, typename LazyFactory, - typename LazyOperation> -using EnableIfTestable = typename absl::enable_if_t< - LazyContractsCount != 0 && - !std::is_same<LazyFactory, UninitializedT>::value && - !std::is_same<LazyOperation, UninitializedT>::value>; - -template <typename Factory = UninitializedT, - typename Operation = UninitializedT, typename... Contracts> -class ExceptionSafetyTestBuilder; - -} // namespace exceptions_internal - -/* - * Constructs an empty ExceptionSafetyTestBuilder. All - * ExceptionSafetyTestBuilder objects are immutable and all With[thing] mutation - * methods return new instances of ExceptionSafetyTestBuilder. - * - * In order to test a T for exception safety, a factory for that T, a testable - * operation, and at least one contract callback returning an assertion - * result must be applied using the respective methods. - */ -exceptions_internal::ExceptionSafetyTestBuilder<> MakeExceptionSafetyTester(); - -namespace exceptions_internal { -template <typename T> -struct IsUniquePtr : std::false_type {}; - -template <typename T, typename D> -struct IsUniquePtr<std::unique_ptr<T, D>> : std::true_type {}; - -template <typename Factory> -struct FactoryPtrTypeHelper { - using type = decltype(std::declval<const Factory&>()()); - - static_assert(IsUniquePtr<type>::value, "Factories must return a unique_ptr"); -}; - -template <typename Factory> -using FactoryPtrType = typename FactoryPtrTypeHelper<Factory>::type; - -template <typename Factory> -using FactoryElementType = typename FactoryPtrType<Factory>::element_type; - -template <typename T> -class ExceptionSafetyTest { - using Factory = std::function<std::unique_ptr<T>()>; - using Operation = std::function<void(T*)>; - using Contract = std::function<AssertionResult(T*)>; - - public: - template <typename... Contracts> - explicit ExceptionSafetyTest(const Factory& f, const Operation& op, - const Contracts&... contracts) - : factory_(f), operation_(op), contracts_{WrapContract(contracts)...} {} - - AssertionResult Test() const { - for (int count = 0;; ++count) { - exceptions_internal::ConstructorTracker ct(count); - - for (const auto& contract : contracts_) { - auto t_ptr = factory_(); - try { - SetCountdown(count); - operation_(t_ptr.get()); - // Unset for the case that the operation throws no exceptions, which - // would leave the countdown set and break the *next* exception safety - // test after this one. - UnsetCountdown(); - return AssertionSuccess(); - } catch (const exceptions_internal::TestException& e) { - if (!contract(t_ptr.get())) { - return AssertionFailure() << e.what() << " failed contract check"; - } - } - } - } - } - - private: - template <typename ContractFn> - Contract WrapContract(const ContractFn& contract) { - return [contract](T* t_ptr) { return AssertionResult(contract(t_ptr)); }; - } - - Contract WrapContract(StrongGuaranteeTagType) { - return [this](T* t_ptr) { return AssertionResult(*factory_() == *t_ptr); }; - } - - Factory factory_; - Operation operation_; - std::vector<Contract> contracts_; -}; - -/* - * Builds a tester object that tests if performing a operation on a T follows - * exception safety guarantees. Verification is done via contract assertion - * callbacks applied to T instances post-throw. - * - * Template parameters for ExceptionSafetyTestBuilder: - * - * - Factory: The factory object (passed in via tester.WithFactory(...) or - * tester.WithInitialValue(...)) must be invocable with the signature - * `std::unique_ptr<T> operator()() const` where T is the type being tested. - * It is used for reliably creating identical T instances to test on. - * - * - Operation: The operation object (passsed in via tester.WithOperation(...) - * or tester.Test(...)) must be invocable with the signature - * `void operator()(T*) const` where T is the type being tested. It is used - * for performing steps on a T instance that may throw and that need to be - * checked for exception safety. Each call to the operation will receive a - * fresh T instance so it's free to modify and destroy the T instances as it - * pleases. - * - * - Contracts...: The contract assertion callback objects (passed in via - * tester.WithContracts(...)) must be invocable with the signature - * `testing::AssertionResult operator()(T*) const` where T is the type being - * tested. Contract assertion callbacks are provided T instances post-throw. - * They must return testing::AssertionSuccess when the type contracts of the - * provided T instance hold. If the type contracts of the T instance do not - * hold, they must return testing::AssertionFailure. Execution order of - * Contracts... is unspecified. They will each individually get a fresh T - * instance so they are free to modify and destroy the T instances as they - * please. - */ -template <typename Factory, typename Operation, typename... Contracts> -class ExceptionSafetyTestBuilder { - public: - /* - * Returns a new ExceptionSafetyTestBuilder with an included T factory based - * on the provided T instance. The existing factory will not be included in - * the newly created tester instance. The created factory returns a new T - * instance by copy-constructing the provided const T& t. - * - * Preconditions for tester.WithInitialValue(const T& t): - * - * - The const T& t object must be copy-constructible where T is the type - * being tested. For non-copy-constructible objects, use the method - * tester.WithFactory(...). - */ - template <typename T> - ExceptionSafetyTestBuilder<DefaultFactory<T>, Operation, Contracts...> - WithInitialValue(const T& t) const { - return WithFactory(DefaultFactory<T>(t)); - } - - /* - * Returns a new ExceptionSafetyTestBuilder with the provided T factory - * included. The existing factory will not be included in the newly-created - * tester instance. This method is intended for use with types lacking a copy - * constructor. Types that can be copy-constructed should instead use the - * method tester.WithInitialValue(...). - */ - template <typename NewFactory> - ExceptionSafetyTestBuilder<absl::decay_t<NewFactory>, Operation, Contracts...> - WithFactory(const NewFactory& new_factory) const { - return {new_factory, operation_, contracts_}; - } - - /* - * Returns a new ExceptionSafetyTestBuilder with the provided testable - * operation included. The existing operation will not be included in the - * newly created tester. - */ - template <typename NewOperation> - ExceptionSafetyTestBuilder<Factory, absl::decay_t<NewOperation>, Contracts...> - WithOperation(const NewOperation& new_operation) const { - return {factory_, new_operation, contracts_}; - } - - /* - * Returns a new ExceptionSafetyTestBuilder with the provided MoreContracts... - * combined with the Contracts... that were already included in the instance - * on which the method was called. Contracts... cannot be removed or replaced - * once added to an ExceptionSafetyTestBuilder instance. A fresh object must - * be created in order to get an empty Contracts... list. - * - * In addition to passing in custom contract assertion callbacks, this method - * accepts `testing::strong_guarantee` as an argument which checks T instances - * post-throw against freshly created T instances via operator== to verify - * that any state changes made during the execution of the operation were - * properly rolled back. - */ - template <typename... MoreContracts> - ExceptionSafetyTestBuilder<Factory, Operation, Contracts..., - absl::decay_t<MoreContracts>...> - WithContracts(const MoreContracts&... more_contracts) const { - return { - factory_, operation_, - std::tuple_cat(contracts_, std::tuple<absl::decay_t<MoreContracts>...>( - more_contracts...))}; - } - - /* - * Returns a testing::AssertionResult that is the reduced result of the - * exception safety algorithm. The algorithm short circuits and returns - * AssertionFailure after the first contract callback returns an - * AssertionFailure. Otherwise, if all contract callbacks return an - * AssertionSuccess, the reduced result is AssertionSuccess. - * - * The passed-in testable operation will not be saved in a new tester instance - * nor will it modify/replace the existing tester instance. This is useful - * when each operation being tested is unique and does not need to be reused. - * - * Preconditions for tester.Test(const NewOperation& new_operation): - * - * - May only be called after at least one contract assertion callback and a - * factory or initial value have been provided. - */ - template < - typename NewOperation, - typename = EnableIfTestable<sizeof...(Contracts), Factory, NewOperation>> - testing::AssertionResult Test(const NewOperation& new_operation) const { - return TestImpl(new_operation, absl::index_sequence_for<Contracts...>()); - } - - /* - * Returns a testing::AssertionResult that is the reduced result of the - * exception safety algorithm. The algorithm short circuits and returns - * AssertionFailure after the first contract callback returns an - * AssertionFailure. Otherwise, if all contract callbacks return an - * AssertionSuccess, the reduced result is AssertionSuccess. - * - * Preconditions for tester.Test(): - * - * - May only be called after at least one contract assertion callback, a - * factory or initial value and a testable operation have been provided. - */ - template < - typename LazyOperation = Operation, - typename = EnableIfTestable<sizeof...(Contracts), Factory, LazyOperation>> - testing::AssertionResult Test() const { - return Test(operation_); - } - - private: - template <typename, typename, typename...> - friend class ExceptionSafetyTestBuilder; - - friend ExceptionSafetyTestBuilder<> testing::MakeExceptionSafetyTester(); - - ExceptionSafetyTestBuilder() {} - - ExceptionSafetyTestBuilder(const Factory& f, const Operation& o, - const std::tuple<Contracts...>& i) - : factory_(f), operation_(o), contracts_(i) {} - - template <typename SelectedOperation, size_t... Indices> - testing::AssertionResult TestImpl(SelectedOperation selected_operation, - absl::index_sequence<Indices...>) const { - return ExceptionSafetyTest<FactoryElementType<Factory>>( - factory_, selected_operation, std::get<Indices>(contracts_)...) - .Test(); - } - - Factory factory_; - Operation operation_; - std::tuple<Contracts...> contracts_; -}; - -} // namespace exceptions_internal - -} // namespace testing - -#endif // ABSL_HAVE_EXCEPTIONS - -#endif // ABSL_BASE_INTERNAL_EXCEPTION_SAFETY_TESTING_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/exception_testing.h b/third_party/abseil_cpp/absl/base/internal/exception_testing.h deleted file mode 100644 index 01b5465571..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/exception_testing.h +++ /dev/null @@ -1,42 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Testing utilities for ABSL types which throw exceptions. - -#ifndef ABSL_BASE_INTERNAL_EXCEPTION_TESTING_H_ -#define ABSL_BASE_INTERNAL_EXCEPTION_TESTING_H_ - -#include "gtest/gtest.h" -#include "absl/base/config.h" - -// ABSL_BASE_INTERNAL_EXPECT_FAIL tests either for a specified thrown exception -// if exceptions are enabled, or for death with a specified text in the error -// message -#ifdef ABSL_HAVE_EXCEPTIONS - -#define ABSL_BASE_INTERNAL_EXPECT_FAIL(expr, exception_t, text) \ - EXPECT_THROW(expr, exception_t) - -#elif defined(__ANDROID__) -// Android asserts do not log anywhere that gtest can currently inspect. -// So we expect exit, but cannot match the message. -#define ABSL_BASE_INTERNAL_EXPECT_FAIL(expr, exception_t, text) \ - EXPECT_DEATH(expr, ".*") -#else -#define ABSL_BASE_INTERNAL_EXPECT_FAIL(expr, exception_t, text) \ - EXPECT_DEATH_IF_SUPPORTED(expr, text) - -#endif - -#endif // ABSL_BASE_INTERNAL_EXCEPTION_TESTING_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/exponential_biased.cc b/third_party/abseil_cpp/absl/base/internal/exponential_biased.cc deleted file mode 100644 index 1b30c061e3..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/exponential_biased.cc +++ /dev/null @@ -1,93 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/exponential_biased.h" - -#include <stdint.h> - -#include <algorithm> -#include <atomic> -#include <cmath> -#include <limits> - -#include "absl/base/attributes.h" -#include "absl/base/optimization.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// The algorithm generates a random number between 0 and 1 and applies the -// inverse cumulative distribution function for an exponential. Specifically: -// Let m be the inverse of the sample period, then the probability -// distribution function is m*exp(-mx) so the CDF is -// p = 1 - exp(-mx), so -// q = 1 - p = exp(-mx) -// log_e(q) = -mx -// -log_e(q)/m = x -// log_2(q) * (-log_e(2) * 1/m) = x -// In the code, q is actually in the range 1 to 2**26, hence the -26 below -int64_t ExponentialBiased::GetSkipCount(int64_t mean) { - if (ABSL_PREDICT_FALSE(!initialized_)) { - Initialize(); - } - - uint64_t rng = NextRandom(rng_); - rng_ = rng; - - // Take the top 26 bits as the random number - // (This plus the 1<<58 sampling bound give a max possible step of - // 5194297183973780480 bytes.) - // The uint32_t cast is to prevent a (hard-to-reproduce) NAN - // under piii debug for some binaries. - double q = static_cast<uint32_t>(rng >> (kPrngNumBits - 26)) + 1.0; - // Put the computed p-value through the CDF of a geometric. - double interval = bias_ + (std::log2(q) - 26) * (-std::log(2.0) * mean); - // Very large values of interval overflow int64_t. To avoid that, we will - // cheat and clamp any huge values to (int64_t max)/2. This is a potential - // source of bias, but the mean would need to be such a large value that it's - // not likely to come up. For example, with a mean of 1e18, the probability of - // hitting this condition is about 1/1000. For a mean of 1e17, standard - // calculators claim that this event won't happen. - if (interval > static_cast<double>(std::numeric_limits<int64_t>::max() / 2)) { - // Assume huge values are bias neutral, retain bias for next call. - return std::numeric_limits<int64_t>::max() / 2; - } - double value = std::round(interval); - bias_ = interval - value; - return value; -} - -int64_t ExponentialBiased::GetStride(int64_t mean) { - return GetSkipCount(mean - 1) + 1; -} - -void ExponentialBiased::Initialize() { - // We don't get well distributed numbers from `this` so we call NextRandom() a - // bunch to mush the bits around. We use a global_rand to handle the case - // where the same thread (by memory address) gets created and destroyed - // repeatedly. - ABSL_CONST_INIT static std::atomic<uint32_t> global_rand(0); - uint64_t r = reinterpret_cast<uint64_t>(this) + - global_rand.fetch_add(1, std::memory_order_relaxed); - for (int i = 0; i < 20; ++i) { - r = NextRandom(r); - } - rng_ = r; - initialized_ = true; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/exponential_biased.h b/third_party/abseil_cpp/absl/base/internal/exponential_biased.h deleted file mode 100644 index 94f79a3378..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/exponential_biased.h +++ /dev/null @@ -1,130 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_EXPONENTIAL_BIASED_H_ -#define ABSL_BASE_INTERNAL_EXPONENTIAL_BIASED_H_ - -#include <stdint.h> - -#include "absl/base/config.h" -#include "absl/base/macros.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// ExponentialBiased provides a small and fast random number generator for a -// rounded exponential distribution. This generator manages very little state, -// and imposes no synchronization overhead. This makes it useful in specialized -// scenarios requiring minimum overhead, such as stride based periodic sampling. -// -// ExponentialBiased provides two closely related functions, GetSkipCount() and -// GetStride(), both returning a rounded integer defining a number of events -// required before some event with a given mean probability occurs. -// -// The distribution is useful to generate a random wait time or some periodic -// event with a given mean probability. For example, if an action is supposed to -// happen on average once every 'N' events, then we can get a random 'stride' -// counting down how long before the event to happen. For example, if we'd want -// to sample one in every 1000 'Frobber' calls, our code could look like this: -// -// Frobber::Frobber() { -// stride_ = exponential_biased_.GetStride(1000); -// } -// -// void Frobber::Frob(int arg) { -// if (--stride == 0) { -// SampleFrob(arg); -// stride_ = exponential_biased_.GetStride(1000); -// } -// ... -// } -// -// The rounding of the return value creates a bias, especially for smaller means -// where the distribution of the fraction is not evenly distributed. We correct -// this bias by tracking the fraction we rounded up or down on each iteration, -// effectively tracking the distance between the cumulative value, and the -// rounded cumulative value. For example, given a mean of 2: -// -// raw = 1.63076, cumulative = 1.63076, rounded = 2, bias = -0.36923 -// raw = 0.14624, cumulative = 1.77701, rounded = 2, bias = 0.14624 -// raw = 4.93194, cumulative = 6.70895, rounded = 7, bias = -0.06805 -// raw = 0.24206, cumulative = 6.95101, rounded = 7, bias = 0.24206 -// etc... -// -// Adjusting with rounding bias is relatively trivial: -// -// double value = bias_ + exponential_distribution(mean)(); -// double rounded_value = std::round(value); -// bias_ = value - rounded_value; -// return rounded_value; -// -// This class is thread-compatible. -class ExponentialBiased { - public: - // The number of bits set by NextRandom. - static constexpr int kPrngNumBits = 48; - - // `GetSkipCount()` returns the number of events to skip before some chosen - // event happens. For example, randomly tossing a coin, we will on average - // throw heads once before we get tails. We can simulate random coin tosses - // using GetSkipCount() as: - // - // ExponentialBiased eb; - // for (...) { - // int number_of_heads_before_tail = eb.GetSkipCount(1); - // for (int flips = 0; flips < number_of_heads_before_tail; ++flips) { - // printf("head..."); - // } - // printf("tail\n"); - // } - // - int64_t GetSkipCount(int64_t mean); - - // GetStride() returns the number of events required for a specific event to - // happen. See the class comments for a usage example. `GetStride()` is - // equivalent to `GetSkipCount(mean - 1) + 1`. When to use `GetStride()` or - // `GetSkipCount()` depends mostly on what best fits the use case. - int64_t GetStride(int64_t mean); - - // Computes a random number in the range [0, 1<<(kPrngNumBits+1) - 1] - // - // This is public to enable testing. - static uint64_t NextRandom(uint64_t rnd); - - private: - void Initialize(); - - uint64_t rng_{0}; - double bias_{0}; - bool initialized_{false}; -}; - -// Returns the next prng value. -// pRNG is: aX+b mod c with a = 0x5DEECE66D, b = 0xB, c = 1<<48 -// This is the lrand64 generator. -inline uint64_t ExponentialBiased::NextRandom(uint64_t rnd) { - const uint64_t prng_mult = uint64_t{0x5DEECE66D}; - const uint64_t prng_add = 0xB; - const uint64_t prng_mod_power = 48; - const uint64_t prng_mod_mask = - ~((~static_cast<uint64_t>(0)) << prng_mod_power); - return (prng_mult * rnd + prng_add) & prng_mod_mask; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_EXPONENTIAL_BIASED_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/exponential_biased_test.cc b/third_party/abseil_cpp/absl/base/internal/exponential_biased_test.cc deleted file mode 100644 index 90a482d2a9..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/exponential_biased_test.cc +++ /dev/null @@ -1,199 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/exponential_biased.h" - -#include <stddef.h> - -#include <cmath> -#include <cstdint> -#include <vector> - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/strings/str_cat.h" - -using ::testing::Ge; - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -MATCHER_P2(IsBetween, a, b, - absl::StrCat(std::string(negation ? "isn't" : "is"), " between ", a, - " and ", b)) { - return a <= arg && arg <= b; -} - -// Tests of the quality of the random numbers generated -// This uses the Anderson Darling test for uniformity. -// See "Evaluating the Anderson-Darling Distribution" by Marsaglia -// for details. - -// Short cut version of ADinf(z), z>0 (from Marsaglia) -// This returns the p-value for Anderson Darling statistic in -// the limit as n-> infinity. For finite n, apply the error fix below. -double AndersonDarlingInf(double z) { - if (z < 2) { - return exp(-1.2337141 / z) / sqrt(z) * - (2.00012 + - (0.247105 - - (0.0649821 - (0.0347962 - (0.011672 - 0.00168691 * z) * z) * z) * - z) * - z); - } - return exp( - -exp(1.0776 - - (2.30695 - - (0.43424 - (0.082433 - (0.008056 - 0.0003146 * z) * z) * z) * z) * - z)); -} - -// Corrects the approximation error in AndersonDarlingInf for small values of n -// Add this to AndersonDarlingInf to get a better approximation -// (from Marsaglia) -double AndersonDarlingErrFix(int n, double x) { - if (x > 0.8) { - return (-130.2137 + - (745.2337 - - (1705.091 - (1950.646 - (1116.360 - 255.7844 * x) * x) * x) * x) * - x) / - n; - } - double cutoff = 0.01265 + 0.1757 / n; - if (x < cutoff) { - double t = x / cutoff; - t = sqrt(t) * (1 - t) * (49 * t - 102); - return t * (0.0037 / (n * n) + 0.00078 / n + 0.00006) / n; - } else { - double t = (x - cutoff) / (0.8 - cutoff); - t = -0.00022633 + - (6.54034 - (14.6538 - (14.458 - (8.259 - 1.91864 * t) * t) * t) * t) * - t; - return t * (0.04213 + 0.01365 / n) / n; - } -} - -// Returns the AndersonDarling p-value given n and the value of the statistic -double AndersonDarlingPValue(int n, double z) { - double ad = AndersonDarlingInf(z); - double errfix = AndersonDarlingErrFix(n, ad); - return ad + errfix; -} - -double AndersonDarlingStatistic(const std::vector<double>& random_sample) { - int n = random_sample.size(); - double ad_sum = 0; - for (int i = 0; i < n; i++) { - ad_sum += (2 * i + 1) * - std::log(random_sample[i] * (1 - random_sample[n - 1 - i])); - } - double ad_statistic = -n - 1 / static_cast<double>(n) * ad_sum; - return ad_statistic; -} - -// Tests if the array of doubles is uniformly distributed. -// Returns the p-value of the Anderson Darling Statistic -// for the given set of sorted random doubles -// See "Evaluating the Anderson-Darling Distribution" by -// Marsaglia and Marsaglia for details. -double AndersonDarlingTest(const std::vector<double>& random_sample) { - double ad_statistic = AndersonDarlingStatistic(random_sample); - double p = AndersonDarlingPValue(random_sample.size(), ad_statistic); - return p; -} - -TEST(ExponentialBiasedTest, CoinTossDemoWithGetSkipCount) { - ExponentialBiased eb; - for (int runs = 0; runs < 10; ++runs) { - for (int flips = eb.GetSkipCount(1); flips > 0; --flips) { - printf("head..."); - } - printf("tail\n"); - } - int heads = 0; - for (int i = 0; i < 10000000; i += 1 + eb.GetSkipCount(1)) { - ++heads; - } - printf("Heads = %d (%f%%)\n", heads, 100.0 * heads / 10000000); -} - -TEST(ExponentialBiasedTest, SampleDemoWithStride) { - ExponentialBiased eb; - int stride = eb.GetStride(10); - int samples = 0; - for (int i = 0; i < 10000000; ++i) { - if (--stride == 0) { - ++samples; - stride = eb.GetStride(10); - } - } - printf("Samples = %d (%f%%)\n", samples, 100.0 * samples / 10000000); -} - - -// Testing that NextRandom generates uniform random numbers. Applies the -// Anderson-Darling test for uniformity -TEST(ExponentialBiasedTest, TestNextRandom) { - for (auto n : std::vector<int>({ - 10, // Check short-range correlation - 100, 1000, - 10000 // Make sure there's no systemic error - })) { - uint64_t x = 1; - // This assumes that the prng returns 48 bit numbers - uint64_t max_prng_value = static_cast<uint64_t>(1) << 48; - // Initialize. - for (int i = 1; i <= 20; i++) { - x = ExponentialBiased::NextRandom(x); - } - std::vector<uint64_t> int_random_sample(n); - // Collect samples - for (int i = 0; i < n; i++) { - int_random_sample[i] = x; - x = ExponentialBiased::NextRandom(x); - } - // First sort them... - std::sort(int_random_sample.begin(), int_random_sample.end()); - std::vector<double> random_sample(n); - // Convert them to uniform randoms (in the range [0,1]) - for (int i = 0; i < n; i++) { - random_sample[i] = - static_cast<double>(int_random_sample[i]) / max_prng_value; - } - // Now compute the Anderson-Darling statistic - double ad_pvalue = AndersonDarlingTest(random_sample); - EXPECT_GT(std::min(ad_pvalue, 1 - ad_pvalue), 0.0001) - << "prng is not uniform: n = " << n << " p = " << ad_pvalue; - } -} - -// The generator needs to be available as a thread_local and as a static -// variable. -TEST(ExponentialBiasedTest, InitializationModes) { - ABSL_CONST_INIT static ExponentialBiased eb_static; - EXPECT_THAT(eb_static.GetSkipCount(2), Ge(0)); - -#if ABSL_HAVE_THREAD_LOCAL - thread_local ExponentialBiased eb_thread; - EXPECT_THAT(eb_thread.GetSkipCount(2), Ge(0)); -#endif - - ExponentialBiased eb_stack; - EXPECT_THAT(eb_stack.GetSkipCount(2), Ge(0)); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/fast_type_id.h b/third_party/abseil_cpp/absl/base/internal/fast_type_id.h deleted file mode 100644 index 3db59e8374..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/fast_type_id.h +++ /dev/null @@ -1,48 +0,0 @@ -// -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -#ifndef ABSL_BASE_INTERNAL_FAST_TYPE_ID_H_ -#define ABSL_BASE_INTERNAL_FAST_TYPE_ID_H_ - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -template <typename Type> -struct FastTypeTag { - constexpr static char dummy_var = 0; -}; - -template <typename Type> -constexpr char FastTypeTag<Type>::dummy_var; - -// FastTypeId<Type>() evaluates at compile/link-time to a unique pointer for the -// passed-in type. These are meant to be good match for keys into maps or -// straight up comparisons. -using FastTypeIdType = const void*; - -template <typename Type> -constexpr inline FastTypeIdType FastTypeId() { - return &FastTypeTag<Type>::dummy_var; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_FAST_TYPE_ID_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/fast_type_id_test.cc b/third_party/abseil_cpp/absl/base/internal/fast_type_id_test.cc deleted file mode 100644 index 16f3c1458b..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/fast_type_id_test.cc +++ /dev/null @@ -1,123 +0,0 @@ -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/fast_type_id.h" - -#include <cstdint> -#include <map> -#include <vector> - -#include "gtest/gtest.h" - -namespace { -namespace bi = absl::base_internal; - -// NOLINTNEXTLINE -#define PRIM_TYPES(A) \ - A(bool) \ - A(short) \ - A(unsigned short) \ - A(int) \ - A(unsigned int) \ - A(long) \ - A(unsigned long) \ - A(long long) \ - A(unsigned long long) \ - A(float) \ - A(double) \ - A(long double) - -TEST(FastTypeIdTest, PrimitiveTypes) { - bi::FastTypeIdType type_ids[] = { -#define A(T) bi::FastTypeId<T>(), - PRIM_TYPES(A) -#undef A -#define A(T) bi::FastTypeId<const T>(), - PRIM_TYPES(A) -#undef A -#define A(T) bi::FastTypeId<volatile T>(), - PRIM_TYPES(A) -#undef A -#define A(T) bi::FastTypeId<const volatile T>(), - PRIM_TYPES(A) -#undef A - }; - size_t total_type_ids = sizeof(type_ids) / sizeof(bi::FastTypeIdType); - - for (int i = 0; i < total_type_ids; ++i) { - EXPECT_EQ(type_ids[i], type_ids[i]); - for (int j = 0; j < i; ++j) { - EXPECT_NE(type_ids[i], type_ids[j]); - } - } -} - -#define FIXED_WIDTH_TYPES(A) \ - A(int8_t) \ - A(uint8_t) \ - A(int16_t) \ - A(uint16_t) \ - A(int32_t) \ - A(uint32_t) \ - A(int64_t) \ - A(uint64_t) - -TEST(FastTypeIdTest, FixedWidthTypes) { - bi::FastTypeIdType type_ids[] = { -#define A(T) bi::FastTypeId<T>(), - FIXED_WIDTH_TYPES(A) -#undef A -#define A(T) bi::FastTypeId<const T>(), - FIXED_WIDTH_TYPES(A) -#undef A -#define A(T) bi::FastTypeId<volatile T>(), - FIXED_WIDTH_TYPES(A) -#undef A -#define A(T) bi::FastTypeId<const volatile T>(), - FIXED_WIDTH_TYPES(A) -#undef A - }; - size_t total_type_ids = sizeof(type_ids) / sizeof(bi::FastTypeIdType); - - for (int i = 0; i < total_type_ids; ++i) { - EXPECT_EQ(type_ids[i], type_ids[i]); - for (int j = 0; j < i; ++j) { - EXPECT_NE(type_ids[i], type_ids[j]); - } - } -} - -TEST(FastTypeIdTest, AliasTypes) { - using int_alias = int; - EXPECT_EQ(bi::FastTypeId<int_alias>(), bi::FastTypeId<int>()); -} - -TEST(FastTypeIdTest, TemplateSpecializations) { - EXPECT_NE(bi::FastTypeId<std::vector<int>>(), - bi::FastTypeId<std::vector<long>>()); - - EXPECT_NE((bi::FastTypeId<std::map<int, float>>()), - (bi::FastTypeId<std::map<int, double>>())); -} - -struct Base {}; -struct Derived : Base {}; -struct PDerived : private Base {}; - -TEST(FastTypeIdTest, Inheritance) { - EXPECT_NE(bi::FastTypeId<Base>(), bi::FastTypeId<Derived>()); - EXPECT_NE(bi::FastTypeId<Base>(), bi::FastTypeId<PDerived>()); -} - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/hide_ptr.h b/third_party/abseil_cpp/absl/base/internal/hide_ptr.h deleted file mode 100644 index 1dba80909a..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/hide_ptr.h +++ /dev/null @@ -1,51 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_HIDE_PTR_H_ -#define ABSL_BASE_INTERNAL_HIDE_PTR_H_ - -#include <cstdint> - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// Arbitrary value with high bits set. Xor'ing with it is unlikely -// to map one valid pointer to another valid pointer. -constexpr uintptr_t HideMask() { - return (uintptr_t{0xF03A5F7BU} << (sizeof(uintptr_t) - 4) * 8) | 0xF03A5F7BU; -} - -// Hide a pointer from the leak checker. For internal use only. -// Differs from absl::IgnoreLeak(ptr) in that absl::IgnoreLeak(ptr) causes ptr -// and all objects reachable from ptr to be ignored by the leak checker. -template <class T> -inline uintptr_t HidePtr(T* ptr) { - return reinterpret_cast<uintptr_t>(ptr) ^ HideMask(); -} - -// Return a pointer that has been hidden from the leak checker. -// For internal use only. -template <class T> -inline T* UnhidePtr(uintptr_t hidden) { - return reinterpret_cast<T*>(hidden ^ HideMask()); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_HIDE_PTR_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/identity.h b/third_party/abseil_cpp/absl/base/internal/identity.h deleted file mode 100644 index a3154ed7bc..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/identity.h +++ /dev/null @@ -1,37 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -#ifndef ABSL_BASE_INTERNAL_IDENTITY_H_ -#define ABSL_BASE_INTERNAL_IDENTITY_H_ - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace internal { - -template <typename T> -struct identity { - typedef T type; -}; - -template <typename T> -using identity_t = typename identity<T>::type; - -} // namespace internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_IDENTITY_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/inline_variable.h b/third_party/abseil_cpp/absl/base/internal/inline_variable.h deleted file mode 100644 index 130d8c2476..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/inline_variable.h +++ /dev/null @@ -1,107 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_ -#define ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_ - -#include <type_traits> - -#include "absl/base/internal/identity.h" - -// File: -// This file define a macro that allows the creation of or emulation of C++17 -// inline variables based on whether or not the feature is supported. - -//////////////////////////////////////////////////////////////////////////////// -// Macro: ABSL_INTERNAL_INLINE_CONSTEXPR(type, name, init) -// -// Description: -// Expands to the equivalent of an inline constexpr instance of the specified -// `type` and `name`, initialized to the value `init`. If the compiler being -// used is detected as supporting actual inline variables as a language -// feature, then the macro expands to an actual inline variable definition. -// -// Requires: -// `type` is a type that is usable in an extern variable declaration. -// -// Requires: `name` is a valid identifier -// -// Requires: -// `init` is an expression that can be used in the following definition: -// constexpr type name = init; -// -// Usage: -// -// // Equivalent to: `inline constexpr size_t variant_npos = -1;` -// ABSL_INTERNAL_INLINE_CONSTEXPR(size_t, variant_npos, -1); -// -// Differences in implementation: -// For a direct, language-level inline variable, decltype(name) will be the -// type that was specified along with const qualification, whereas for -// emulated inline variables, decltype(name) may be different (in practice -// it will likely be a reference type). -//////////////////////////////////////////////////////////////////////////////// - -#ifdef __cpp_inline_variables - -// Clang's -Wmissing-variable-declarations option erroneously warned that -// inline constexpr objects need to be pre-declared. This has now been fixed, -// but we will need to support this workaround for people building with older -// versions of clang. -// -// Bug: https://bugs.llvm.org/show_bug.cgi?id=35862 -// -// Note: -// identity_t is used here so that the const and name are in the -// appropriate place for pointer types, reference types, function pointer -// types, etc.. -#if defined(__clang__) -#define ABSL_INTERNAL_EXTERN_DECL(type, name) \ - extern const ::absl::internal::identity_t<type> name; -#else // Otherwise, just define the macro to do nothing. -#define ABSL_INTERNAL_EXTERN_DECL(type, name) -#endif // defined(__clang__) - -// See above comment at top of file for details. -#define ABSL_INTERNAL_INLINE_CONSTEXPR(type, name, init) \ - ABSL_INTERNAL_EXTERN_DECL(type, name) \ - inline constexpr ::absl::internal::identity_t<type> name = init - -#else - -// See above comment at top of file for details. -// -// Note: -// identity_t is used here so that the const and name are in the -// appropriate place for pointer types, reference types, function pointer -// types, etc.. -#define ABSL_INTERNAL_INLINE_CONSTEXPR(var_type, name, init) \ - template <class /*AbslInternalDummy*/ = void> \ - struct AbslInternalInlineVariableHolder##name { \ - static constexpr ::absl::internal::identity_t<var_type> kInstance = init; \ - }; \ - \ - template <class AbslInternalDummy> \ - constexpr ::absl::internal::identity_t<var_type> \ - AbslInternalInlineVariableHolder##name<AbslInternalDummy>::kInstance; \ - \ - static constexpr const ::absl::internal::identity_t<var_type>& \ - name = /* NOLINT */ \ - AbslInternalInlineVariableHolder##name<>::kInstance; \ - static_assert(sizeof(void (*)(decltype(name))) != 0, \ - "Silence unused variable warnings.") - -#endif // __cpp_inline_variables - -#endif // ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/inline_variable_testing.h b/third_party/abseil_cpp/absl/base/internal/inline_variable_testing.h deleted file mode 100644 index 3856b9f80f..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/inline_variable_testing.h +++ /dev/null @@ -1,46 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INLINE_VARIABLE_TESTING_H_ -#define ABSL_BASE_INLINE_VARIABLE_TESTING_H_ - -#include "absl/base/internal/inline_variable.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace inline_variable_testing_internal { - -struct Foo { - int value = 5; -}; - -ABSL_INTERNAL_INLINE_CONSTEXPR(Foo, inline_variable_foo, {}); -ABSL_INTERNAL_INLINE_CONSTEXPR(Foo, other_inline_variable_foo, {}); - -ABSL_INTERNAL_INLINE_CONSTEXPR(int, inline_variable_int, 5); -ABSL_INTERNAL_INLINE_CONSTEXPR(int, other_inline_variable_int, 5); - -ABSL_INTERNAL_INLINE_CONSTEXPR(void(*)(), inline_variable_fun_ptr, nullptr); - -const Foo& get_foo_a(); -const Foo& get_foo_b(); - -const int& get_int_a(); -const int& get_int_b(); - -} // namespace inline_variable_testing_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INLINE_VARIABLE_TESTING_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/invoke.h b/third_party/abseil_cpp/absl/base/internal/invoke.h deleted file mode 100644 index c4eceebd7c..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/invoke.h +++ /dev/null @@ -1,187 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// absl::base_internal::Invoke(f, args...) is an implementation of -// INVOKE(f, args...) from section [func.require] of the C++ standard. -// -// [func.require] -// Define INVOKE (f, t1, t2, ..., tN) as follows: -// 1. (t1.*f)(t2, ..., tN) when f is a pointer to a member function of a class T -// and t1 is an object of type T or a reference to an object of type T or a -// reference to an object of a type derived from T; -// 2. ((*t1).*f)(t2, ..., tN) when f is a pointer to a member function of a -// class T and t1 is not one of the types described in the previous item; -// 3. t1.*f when N == 1 and f is a pointer to member data of a class T and t1 is -// an object of type T or a reference to an object of type T or a reference -// to an object of a type derived from T; -// 4. (*t1).*f when N == 1 and f is a pointer to member data of a class T and t1 -// is not one of the types described in the previous item; -// 5. f(t1, t2, ..., tN) in all other cases. -// -// The implementation is SFINAE-friendly: substitution failure within Invoke() -// isn't an error. - -#ifndef ABSL_BASE_INTERNAL_INVOKE_H_ -#define ABSL_BASE_INTERNAL_INVOKE_H_ - -#include <algorithm> -#include <type_traits> -#include <utility> - -#include "absl/meta/type_traits.h" - -// The following code is internal implementation detail. See the comment at the -// top of this file for the API documentation. - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// The five classes below each implement one of the clauses from the definition -// of INVOKE. The inner class template Accept<F, Args...> checks whether the -// clause is applicable; static function template Invoke(f, args...) does the -// invocation. -// -// By separating the clause selection logic from invocation we make sure that -// Invoke() does exactly what the standard says. - -template <typename Derived> -struct StrippedAccept { - template <typename... Args> - struct Accept : Derived::template AcceptImpl<typename std::remove_cv< - typename std::remove_reference<Args>::type>::type...> {}; -}; - -// (t1.*f)(t2, ..., tN) when f is a pointer to a member function of a class T -// and t1 is an object of type T or a reference to an object of type T or a -// reference to an object of a type derived from T. -struct MemFunAndRef : StrippedAccept<MemFunAndRef> { - template <typename... Args> - struct AcceptImpl : std::false_type {}; - - template <typename MemFunType, typename C, typename Obj, typename... Args> - struct AcceptImpl<MemFunType C::*, Obj, Args...> - : std::integral_constant<bool, std::is_base_of<C, Obj>::value && - absl::is_function<MemFunType>::value> { - }; - - template <typename MemFun, typename Obj, typename... Args> - static decltype((std::declval<Obj>().* - std::declval<MemFun>())(std::declval<Args>()...)) - Invoke(MemFun&& mem_fun, Obj&& obj, Args&&... args) { - return (std::forward<Obj>(obj).* - std::forward<MemFun>(mem_fun))(std::forward<Args>(args)...); - } -}; - -// ((*t1).*f)(t2, ..., tN) when f is a pointer to a member function of a -// class T and t1 is not one of the types described in the previous item. -struct MemFunAndPtr : StrippedAccept<MemFunAndPtr> { - template <typename... Args> - struct AcceptImpl : std::false_type {}; - - template <typename MemFunType, typename C, typename Ptr, typename... Args> - struct AcceptImpl<MemFunType C::*, Ptr, Args...> - : std::integral_constant<bool, !std::is_base_of<C, Ptr>::value && - absl::is_function<MemFunType>::value> { - }; - - template <typename MemFun, typename Ptr, typename... Args> - static decltype(((*std::declval<Ptr>()).* - std::declval<MemFun>())(std::declval<Args>()...)) - Invoke(MemFun&& mem_fun, Ptr&& ptr, Args&&... args) { - return ((*std::forward<Ptr>(ptr)).* - std::forward<MemFun>(mem_fun))(std::forward<Args>(args)...); - } -}; - -// t1.*f when N == 1 and f is a pointer to member data of a class T and t1 is -// an object of type T or a reference to an object of type T or a reference -// to an object of a type derived from T. -struct DataMemAndRef : StrippedAccept<DataMemAndRef> { - template <typename... Args> - struct AcceptImpl : std::false_type {}; - - template <typename R, typename C, typename Obj> - struct AcceptImpl<R C::*, Obj> - : std::integral_constant<bool, std::is_base_of<C, Obj>::value && - !absl::is_function<R>::value> {}; - - template <typename DataMem, typename Ref> - static decltype(std::declval<Ref>().*std::declval<DataMem>()) Invoke( - DataMem&& data_mem, Ref&& ref) { - return std::forward<Ref>(ref).*std::forward<DataMem>(data_mem); - } -}; - -// (*t1).*f when N == 1 and f is a pointer to member data of a class T and t1 -// is not one of the types described in the previous item. -struct DataMemAndPtr : StrippedAccept<DataMemAndPtr> { - template <typename... Args> - struct AcceptImpl : std::false_type {}; - - template <typename R, typename C, typename Ptr> - struct AcceptImpl<R C::*, Ptr> - : std::integral_constant<bool, !std::is_base_of<C, Ptr>::value && - !absl::is_function<R>::value> {}; - - template <typename DataMem, typename Ptr> - static decltype((*std::declval<Ptr>()).*std::declval<DataMem>()) Invoke( - DataMem&& data_mem, Ptr&& ptr) { - return (*std::forward<Ptr>(ptr)).*std::forward<DataMem>(data_mem); - } -}; - -// f(t1, t2, ..., tN) in all other cases. -struct Callable { - // Callable doesn't have Accept because it's the last clause that gets picked - // when none of the previous clauses are applicable. - template <typename F, typename... Args> - static decltype(std::declval<F>()(std::declval<Args>()...)) Invoke( - F&& f, Args&&... args) { - return std::forward<F>(f)(std::forward<Args>(args)...); - } -}; - -// Resolves to the first matching clause. -template <typename... Args> -struct Invoker { - typedef typename std::conditional< - MemFunAndRef::Accept<Args...>::value, MemFunAndRef, - typename std::conditional< - MemFunAndPtr::Accept<Args...>::value, MemFunAndPtr, - typename std::conditional< - DataMemAndRef::Accept<Args...>::value, DataMemAndRef, - typename std::conditional<DataMemAndPtr::Accept<Args...>::value, - DataMemAndPtr, Callable>::type>::type>:: - type>::type type; -}; - -// The result type of Invoke<F, Args...>. -template <typename F, typename... Args> -using InvokeT = decltype(Invoker<F, Args...>::type::Invoke( - std::declval<F>(), std::declval<Args>()...)); - -// Invoke(f, args...) is an implementation of INVOKE(f, args...) from section -// [func.require] of the C++ standard. -template <typename F, typename... Args> -InvokeT<F, Args...> Invoke(F&& f, Args&&... args) { - return Invoker<F, Args...>::type::Invoke(std::forward<F>(f), - std::forward<Args>(args)...); -} -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_INVOKE_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/low_level_alloc.cc b/third_party/abseil_cpp/absl/base/internal/low_level_alloc.cc deleted file mode 100644 index 1bf94438d6..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/low_level_alloc.cc +++ /dev/null @@ -1,620 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// A low-level allocator that can be used by other low-level -// modules without introducing dependency cycles. -// This allocator is slow and wasteful of memory; -// it should not be used when performance is key. - -#include "absl/base/internal/low_level_alloc.h" - -#include <type_traits> - -#include "absl/base/call_once.h" -#include "absl/base/config.h" -#include "absl/base/internal/direct_mmap.h" -#include "absl/base/internal/scheduling_mode.h" -#include "absl/base/macros.h" -#include "absl/base/thread_annotations.h" - -// LowLevelAlloc requires that the platform support low-level -// allocation of virtual memory. Platforms lacking this cannot use -// LowLevelAlloc. -#ifndef ABSL_LOW_LEVEL_ALLOC_MISSING - -#ifndef _WIN32 -#include <pthread.h> -#include <signal.h> -#include <sys/mman.h> -#include <unistd.h> -#else -#include <windows.h> -#endif - -#include <string.h> -#include <algorithm> -#include <atomic> -#include <cerrno> -#include <cstddef> -#include <new> // for placement-new - -#include "absl/base/dynamic_annotations.h" -#include "absl/base/internal/raw_logging.h" -#include "absl/base/internal/spinlock.h" - -// MAP_ANONYMOUS -#if defined(__APPLE__) -// For mmap, Linux defines both MAP_ANONYMOUS and MAP_ANON and says MAP_ANON is -// deprecated. In Darwin, MAP_ANON is all there is. -#if !defined MAP_ANONYMOUS -#define MAP_ANONYMOUS MAP_ANON -#endif // !MAP_ANONYMOUS -#endif // __APPLE__ - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// A first-fit allocator with amortized logarithmic free() time. - -// --------------------------------------------------------------------------- -static const int kMaxLevel = 30; - -namespace { -// This struct describes one allocated block, or one free block. -struct AllocList { - struct Header { - // Size of entire region, including this field. Must be - // first. Valid in both allocated and unallocated blocks. - uintptr_t size; - - // kMagicAllocated or kMagicUnallocated xor this. - uintptr_t magic; - - // Pointer to parent arena. - LowLevelAlloc::Arena *arena; - - // Aligns regions to 0 mod 2*sizeof(void*). - void *dummy_for_alignment; - } header; - - // Next two fields: in unallocated blocks: freelist skiplist data - // in allocated blocks: overlaps with client data - - // Levels in skiplist used. - int levels; - - // Actually has levels elements. The AllocList node may not have room - // for all kMaxLevel entries. See max_fit in LLA_SkiplistLevels(). - AllocList *next[kMaxLevel]; -}; -} // namespace - -// --------------------------------------------------------------------------- -// A trivial skiplist implementation. This is used to keep the freelist -// in address order while taking only logarithmic time per insert and delete. - -// An integer approximation of log2(size/base) -// Requires size >= base. -static int IntLog2(size_t size, size_t base) { - int result = 0; - for (size_t i = size; i > base; i >>= 1) { // i == floor(size/2**result) - result++; - } - // floor(size / 2**result) <= base < floor(size / 2**(result-1)) - // => log2(size/(base+1)) <= result < 1+log2(size/base) - // => result ~= log2(size/base) - return result; -} - -// Return a random integer n: p(n)=1/(2**n) if 1 <= n; p(n)=0 if n < 1. -static int Random(uint32_t *state) { - uint32_t r = *state; - int result = 1; - while ((((r = r*1103515245 + 12345) >> 30) & 1) == 0) { - result++; - } - *state = r; - return result; -} - -// Return a number of skiplist levels for a node of size bytes, where -// base is the minimum node size. Compute level=log2(size / base)+n -// where n is 1 if random is false and otherwise a random number generated with -// the standard distribution for a skiplist: See Random() above. -// Bigger nodes tend to have more skiplist levels due to the log2(size / base) -// term, so first-fit searches touch fewer nodes. "level" is clipped so -// level<kMaxLevel and next[level-1] will fit in the node. -// 0 < LLA_SkiplistLevels(x,y,false) <= LLA_SkiplistLevels(x,y,true) < kMaxLevel -static int LLA_SkiplistLevels(size_t size, size_t base, uint32_t *random) { - // max_fit is the maximum number of levels that will fit in a node for the - // given size. We can't return more than max_fit, no matter what the - // random number generator says. - size_t max_fit = (size - offsetof(AllocList, next)) / sizeof(AllocList *); - int level = IntLog2(size, base) + (random != nullptr ? Random(random) : 1); - if (static_cast<size_t>(level) > max_fit) level = static_cast<int>(max_fit); - if (level > kMaxLevel-1) level = kMaxLevel - 1; - ABSL_RAW_CHECK(level >= 1, "block not big enough for even one level"); - return level; -} - -// Return "atleast", the first element of AllocList *head s.t. *atleast >= *e. -// For 0 <= i < head->levels, set prev[i] to "no_greater", where no_greater -// points to the last element at level i in the AllocList less than *e, or is -// head if no such element exists. -static AllocList *LLA_SkiplistSearch(AllocList *head, - AllocList *e, AllocList **prev) { - AllocList *p = head; - for (int level = head->levels - 1; level >= 0; level--) { - for (AllocList *n; (n = p->next[level]) != nullptr && n < e; p = n) { - } - prev[level] = p; - } - return (head->levels == 0) ? nullptr : prev[0]->next[0]; -} - -// Insert element *e into AllocList *head. Set prev[] as LLA_SkiplistSearch. -// Requires that e->levels be previously set by the caller (using -// LLA_SkiplistLevels()) -static void LLA_SkiplistInsert(AllocList *head, AllocList *e, - AllocList **prev) { - LLA_SkiplistSearch(head, e, prev); - for (; head->levels < e->levels; head->levels++) { // extend prev pointers - prev[head->levels] = head; // to all *e's levels - } - for (int i = 0; i != e->levels; i++) { // add element to list - e->next[i] = prev[i]->next[i]; - prev[i]->next[i] = e; - } -} - -// Remove element *e from AllocList *head. Set prev[] as LLA_SkiplistSearch(). -// Requires that e->levels be previous set by the caller (using -// LLA_SkiplistLevels()) -static void LLA_SkiplistDelete(AllocList *head, AllocList *e, - AllocList **prev) { - AllocList *found = LLA_SkiplistSearch(head, e, prev); - ABSL_RAW_CHECK(e == found, "element not in freelist"); - for (int i = 0; i != e->levels && prev[i]->next[i] == e; i++) { - prev[i]->next[i] = e->next[i]; - } - while (head->levels > 0 && head->next[head->levels - 1] == nullptr) { - head->levels--; // reduce head->levels if level unused - } -} - -// --------------------------------------------------------------------------- -// Arena implementation - -// Metadata for an LowLevelAlloc arena instance. -struct LowLevelAlloc::Arena { - // Constructs an arena with the given LowLevelAlloc flags. - explicit Arena(uint32_t flags_value); - - base_internal::SpinLock mu; - // Head of free list, sorted by address - AllocList freelist ABSL_GUARDED_BY(mu); - // Count of allocated blocks - int32_t allocation_count ABSL_GUARDED_BY(mu); - // flags passed to NewArena - const uint32_t flags; - // Result of sysconf(_SC_PAGESIZE) - const size_t pagesize; - // Lowest power of two >= max(16, sizeof(AllocList)) - const size_t round_up; - // Smallest allocation block size - const size_t min_size; - // PRNG state - uint32_t random ABSL_GUARDED_BY(mu); -}; - -namespace { -// Static storage space for the lazily-constructed, default global arena -// instances. We require this space because the whole point of LowLevelAlloc -// is to avoid relying on malloc/new. -alignas(LowLevelAlloc::Arena) unsigned char default_arena_storage[sizeof( - LowLevelAlloc::Arena)]; -alignas(LowLevelAlloc::Arena) unsigned char unhooked_arena_storage[sizeof( - LowLevelAlloc::Arena)]; -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING -alignas( - LowLevelAlloc::Arena) unsigned char unhooked_async_sig_safe_arena_storage - [sizeof(LowLevelAlloc::Arena)]; -#endif - -// We must use LowLevelCallOnce here to construct the global arenas, rather than -// using function-level statics, to avoid recursively invoking the scheduler. -absl::once_flag create_globals_once; - -void CreateGlobalArenas() { - new (&default_arena_storage) - LowLevelAlloc::Arena(LowLevelAlloc::kCallMallocHook); - new (&unhooked_arena_storage) LowLevelAlloc::Arena(0); -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - new (&unhooked_async_sig_safe_arena_storage) - LowLevelAlloc::Arena(LowLevelAlloc::kAsyncSignalSafe); -#endif -} - -// Returns a global arena that does not call into hooks. Used by NewArena() -// when kCallMallocHook is not set. -LowLevelAlloc::Arena* UnhookedArena() { - base_internal::LowLevelCallOnce(&create_globals_once, CreateGlobalArenas); - return reinterpret_cast<LowLevelAlloc::Arena*>(&unhooked_arena_storage); -} - -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING -// Returns a global arena that is async-signal safe. Used by NewArena() when -// kAsyncSignalSafe is set. -LowLevelAlloc::Arena *UnhookedAsyncSigSafeArena() { - base_internal::LowLevelCallOnce(&create_globals_once, CreateGlobalArenas); - return reinterpret_cast<LowLevelAlloc::Arena *>( - &unhooked_async_sig_safe_arena_storage); -} -#endif - -} // namespace - -// Returns the default arena, as used by LowLevelAlloc::Alloc() and friends. -LowLevelAlloc::Arena *LowLevelAlloc::DefaultArena() { - base_internal::LowLevelCallOnce(&create_globals_once, CreateGlobalArenas); - return reinterpret_cast<LowLevelAlloc::Arena*>(&default_arena_storage); -} - -// magic numbers to identify allocated and unallocated blocks -static const uintptr_t kMagicAllocated = 0x4c833e95U; -static const uintptr_t kMagicUnallocated = ~kMagicAllocated; - -namespace { -class ABSL_SCOPED_LOCKABLE ArenaLock { - public: - explicit ArenaLock(LowLevelAlloc::Arena *arena) - ABSL_EXCLUSIVE_LOCK_FUNCTION(arena->mu) - : arena_(arena) { -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - if ((arena->flags & LowLevelAlloc::kAsyncSignalSafe) != 0) { - sigset_t all; - sigfillset(&all); - mask_valid_ = pthread_sigmask(SIG_BLOCK, &all, &mask_) == 0; - } -#endif - arena_->mu.Lock(); - } - ~ArenaLock() { ABSL_RAW_CHECK(left_, "haven't left Arena region"); } - void Leave() ABSL_UNLOCK_FUNCTION() { - arena_->mu.Unlock(); -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - if (mask_valid_) { - const int err = pthread_sigmask(SIG_SETMASK, &mask_, nullptr); - if (err != 0) { - ABSL_RAW_LOG(FATAL, "pthread_sigmask failed: %d", err); - } - } -#endif - left_ = true; - } - - private: - bool left_ = false; // whether left region -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - bool mask_valid_ = false; - sigset_t mask_; // old mask of blocked signals -#endif - LowLevelAlloc::Arena *arena_; - ArenaLock(const ArenaLock &) = delete; - ArenaLock &operator=(const ArenaLock &) = delete; -}; -} // namespace - -// create an appropriate magic number for an object at "ptr" -// "magic" should be kMagicAllocated or kMagicUnallocated -inline static uintptr_t Magic(uintptr_t magic, AllocList::Header *ptr) { - return magic ^ reinterpret_cast<uintptr_t>(ptr); -} - -namespace { -size_t GetPageSize() { -#ifdef _WIN32 - SYSTEM_INFO system_info; - GetSystemInfo(&system_info); - return std::max(system_info.dwPageSize, system_info.dwAllocationGranularity); -#elif defined(__wasm__) || defined(__asmjs__) - return getpagesize(); -#else - return sysconf(_SC_PAGESIZE); -#endif -} - -size_t RoundedUpBlockSize() { - // Round up block sizes to a power of two close to the header size. - size_t round_up = 16; - while (round_up < sizeof(AllocList::Header)) { - round_up += round_up; - } - return round_up; -} - -} // namespace - -LowLevelAlloc::Arena::Arena(uint32_t flags_value) - : mu(base_internal::SCHEDULE_KERNEL_ONLY), - allocation_count(0), - flags(flags_value), - pagesize(GetPageSize()), - round_up(RoundedUpBlockSize()), - min_size(2 * round_up), - random(0) { - freelist.header.size = 0; - freelist.header.magic = - Magic(kMagicUnallocated, &freelist.header); - freelist.header.arena = this; - freelist.levels = 0; - memset(freelist.next, 0, sizeof(freelist.next)); -} - -// L < meta_data_arena->mu -LowLevelAlloc::Arena *LowLevelAlloc::NewArena(int32_t flags) { - Arena *meta_data_arena = DefaultArena(); -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - if ((flags & LowLevelAlloc::kAsyncSignalSafe) != 0) { - meta_data_arena = UnhookedAsyncSigSafeArena(); - } else // NOLINT(readability/braces) -#endif - if ((flags & LowLevelAlloc::kCallMallocHook) == 0) { - meta_data_arena = UnhookedArena(); - } - Arena *result = - new (AllocWithArena(sizeof (*result), meta_data_arena)) Arena(flags); - return result; -} - -// L < arena->mu, L < arena->arena->mu -bool LowLevelAlloc::DeleteArena(Arena *arena) { - ABSL_RAW_CHECK( - arena != nullptr && arena != DefaultArena() && arena != UnhookedArena(), - "may not delete default arena"); - ArenaLock section(arena); - if (arena->allocation_count != 0) { - section.Leave(); - return false; - } - while (arena->freelist.next[0] != nullptr) { - AllocList *region = arena->freelist.next[0]; - size_t size = region->header.size; - arena->freelist.next[0] = region->next[0]; - ABSL_RAW_CHECK( - region->header.magic == Magic(kMagicUnallocated, ®ion->header), - "bad magic number in DeleteArena()"); - ABSL_RAW_CHECK(region->header.arena == arena, - "bad arena pointer in DeleteArena()"); - ABSL_RAW_CHECK(size % arena->pagesize == 0, - "empty arena has non-page-aligned block size"); - ABSL_RAW_CHECK(reinterpret_cast<uintptr_t>(region) % arena->pagesize == 0, - "empty arena has non-page-aligned block"); - int munmap_result; -#ifdef _WIN32 - munmap_result = VirtualFree(region, 0, MEM_RELEASE); - ABSL_RAW_CHECK(munmap_result != 0, - "LowLevelAlloc::DeleteArena: VitualFree failed"); -#else -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - if ((arena->flags & LowLevelAlloc::kAsyncSignalSafe) == 0) { - munmap_result = munmap(region, size); - } else { - munmap_result = base_internal::DirectMunmap(region, size); - } -#else - munmap_result = munmap(region, size); -#endif // ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - if (munmap_result != 0) { - ABSL_RAW_LOG(FATAL, "LowLevelAlloc::DeleteArena: munmap failed: %d", - errno); - } -#endif // _WIN32 - } - section.Leave(); - arena->~Arena(); - Free(arena); - return true; -} - -// --------------------------------------------------------------------------- - -// Addition, checking for overflow. The intent is to die if an external client -// manages to push through a request that would cause arithmetic to fail. -static inline uintptr_t CheckedAdd(uintptr_t a, uintptr_t b) { - uintptr_t sum = a + b; - ABSL_RAW_CHECK(sum >= a, "LowLevelAlloc arithmetic overflow"); - return sum; -} - -// Return value rounded up to next multiple of align. -// align must be a power of two. -static inline uintptr_t RoundUp(uintptr_t addr, uintptr_t align) { - return CheckedAdd(addr, align - 1) & ~(align - 1); -} - -// Equivalent to "return prev->next[i]" but with sanity checking -// that the freelist is in the correct order, that it -// consists of regions marked "unallocated", and that no two regions -// are adjacent in memory (they should have been coalesced). -// L >= arena->mu -static AllocList *Next(int i, AllocList *prev, LowLevelAlloc::Arena *arena) { - ABSL_RAW_CHECK(i < prev->levels, "too few levels in Next()"); - AllocList *next = prev->next[i]; - if (next != nullptr) { - ABSL_RAW_CHECK( - next->header.magic == Magic(kMagicUnallocated, &next->header), - "bad magic number in Next()"); - ABSL_RAW_CHECK(next->header.arena == arena, "bad arena pointer in Next()"); - if (prev != &arena->freelist) { - ABSL_RAW_CHECK(prev < next, "unordered freelist"); - ABSL_RAW_CHECK(reinterpret_cast<char *>(prev) + prev->header.size < - reinterpret_cast<char *>(next), - "malformed freelist"); - } - } - return next; -} - -// Coalesce list item "a" with its successor if they are adjacent. -static void Coalesce(AllocList *a) { - AllocList *n = a->next[0]; - if (n != nullptr && reinterpret_cast<char *>(a) + a->header.size == - reinterpret_cast<char *>(n)) { - LowLevelAlloc::Arena *arena = a->header.arena; - a->header.size += n->header.size; - n->header.magic = 0; - n->header.arena = nullptr; - AllocList *prev[kMaxLevel]; - LLA_SkiplistDelete(&arena->freelist, n, prev); - LLA_SkiplistDelete(&arena->freelist, a, prev); - a->levels = LLA_SkiplistLevels(a->header.size, arena->min_size, - &arena->random); - LLA_SkiplistInsert(&arena->freelist, a, prev); - } -} - -// Adds block at location "v" to the free list -// L >= arena->mu -static void AddToFreelist(void *v, LowLevelAlloc::Arena *arena) { - AllocList *f = reinterpret_cast<AllocList *>( - reinterpret_cast<char *>(v) - sizeof (f->header)); - ABSL_RAW_CHECK(f->header.magic == Magic(kMagicAllocated, &f->header), - "bad magic number in AddToFreelist()"); - ABSL_RAW_CHECK(f->header.arena == arena, - "bad arena pointer in AddToFreelist()"); - f->levels = LLA_SkiplistLevels(f->header.size, arena->min_size, - &arena->random); - AllocList *prev[kMaxLevel]; - LLA_SkiplistInsert(&arena->freelist, f, prev); - f->header.magic = Magic(kMagicUnallocated, &f->header); - Coalesce(f); // maybe coalesce with successor - Coalesce(prev[0]); // maybe coalesce with predecessor -} - -// Frees storage allocated by LowLevelAlloc::Alloc(). -// L < arena->mu -void LowLevelAlloc::Free(void *v) { - if (v != nullptr) { - AllocList *f = reinterpret_cast<AllocList *>( - reinterpret_cast<char *>(v) - sizeof (f->header)); - LowLevelAlloc::Arena *arena = f->header.arena; - ArenaLock section(arena); - AddToFreelist(v, arena); - ABSL_RAW_CHECK(arena->allocation_count > 0, "nothing in arena to free"); - arena->allocation_count--; - section.Leave(); - } -} - -// allocates and returns a block of size bytes, to be freed with Free() -// L < arena->mu -static void *DoAllocWithArena(size_t request, LowLevelAlloc::Arena *arena) { - void *result = nullptr; - if (request != 0) { - AllocList *s; // will point to region that satisfies request - ArenaLock section(arena); - // round up with header - size_t req_rnd = RoundUp(CheckedAdd(request, sizeof (s->header)), - arena->round_up); - for (;;) { // loop until we find a suitable region - // find the minimum levels that a block of this size must have - int i = LLA_SkiplistLevels(req_rnd, arena->min_size, nullptr) - 1; - if (i < arena->freelist.levels) { // potential blocks exist - AllocList *before = &arena->freelist; // predecessor of s - while ((s = Next(i, before, arena)) != nullptr && - s->header.size < req_rnd) { - before = s; - } - if (s != nullptr) { // we found a region - break; - } - } - // we unlock before mmap() both because mmap() may call a callback hook, - // and because it may be slow. - arena->mu.Unlock(); - // mmap generous 64K chunks to decrease - // the chances/impact of fragmentation: - size_t new_pages_size = RoundUp(req_rnd, arena->pagesize * 16); - void *new_pages; -#ifdef _WIN32 - new_pages = VirtualAlloc(0, new_pages_size, - MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); - ABSL_RAW_CHECK(new_pages != nullptr, "VirtualAlloc failed"); -#else -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - if ((arena->flags & LowLevelAlloc::kAsyncSignalSafe) != 0) { - new_pages = base_internal::DirectMmap(nullptr, new_pages_size, - PROT_WRITE|PROT_READ, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); - } else { - new_pages = mmap(nullptr, new_pages_size, PROT_WRITE | PROT_READ, - MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); - } -#else - new_pages = mmap(nullptr, new_pages_size, PROT_WRITE | PROT_READ, - MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); -#endif // ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - if (new_pages == MAP_FAILED) { - ABSL_RAW_LOG(FATAL, "mmap error: %d", errno); - } - -#endif // _WIN32 - arena->mu.Lock(); - s = reinterpret_cast<AllocList *>(new_pages); - s->header.size = new_pages_size; - // Pretend the block is allocated; call AddToFreelist() to free it. - s->header.magic = Magic(kMagicAllocated, &s->header); - s->header.arena = arena; - AddToFreelist(&s->levels, arena); // insert new region into free list - } - AllocList *prev[kMaxLevel]; - LLA_SkiplistDelete(&arena->freelist, s, prev); // remove from free list - // s points to the first free region that's big enough - if (CheckedAdd(req_rnd, arena->min_size) <= s->header.size) { - // big enough to split - AllocList *n = reinterpret_cast<AllocList *> - (req_rnd + reinterpret_cast<char *>(s)); - n->header.size = s->header.size - req_rnd; - n->header.magic = Magic(kMagicAllocated, &n->header); - n->header.arena = arena; - s->header.size = req_rnd; - AddToFreelist(&n->levels, arena); - } - s->header.magic = Magic(kMagicAllocated, &s->header); - ABSL_RAW_CHECK(s->header.arena == arena, ""); - arena->allocation_count++; - section.Leave(); - result = &s->levels; - } - ANNOTATE_MEMORY_IS_UNINITIALIZED(result, request); - return result; -} - -void *LowLevelAlloc::Alloc(size_t request) { - void *result = DoAllocWithArena(request, DefaultArena()); - return result; -} - -void *LowLevelAlloc::AllocWithArena(size_t request, Arena *arena) { - ABSL_RAW_CHECK(arena != nullptr, "must pass a valid arena"); - void *result = DoAllocWithArena(request, arena); - return result; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_LOW_LEVEL_ALLOC_MISSING diff --git a/third_party/abseil_cpp/absl/base/internal/low_level_alloc.h b/third_party/abseil_cpp/absl/base/internal/low_level_alloc.h deleted file mode 100644 index db91951c82..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/low_level_alloc.h +++ /dev/null @@ -1,126 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -#ifndef ABSL_BASE_INTERNAL_LOW_LEVEL_ALLOC_H_ -#define ABSL_BASE_INTERNAL_LOW_LEVEL_ALLOC_H_ - -// A simple thread-safe memory allocator that does not depend on -// mutexes or thread-specific data. It is intended to be used -// sparingly, and only when malloc() would introduce an unwanted -// dependency, such as inside the heap-checker, or the Mutex -// implementation. - -// IWYU pragma: private, include "base/low_level_alloc.h" - -#include <sys/types.h> - -#include <cstdint> - -#include "absl/base/attributes.h" -#include "absl/base/config.h" - -// LowLevelAlloc requires that the platform support low-level -// allocation of virtual memory. Platforms lacking this cannot use -// LowLevelAlloc. -#ifdef ABSL_LOW_LEVEL_ALLOC_MISSING -#error ABSL_LOW_LEVEL_ALLOC_MISSING cannot be directly set -#elif !defined(ABSL_HAVE_MMAP) && !defined(_WIN32) -#define ABSL_LOW_LEVEL_ALLOC_MISSING 1 -#endif - -// Using LowLevelAlloc with kAsyncSignalSafe isn't supported on Windows or -// asm.js / WebAssembly. -// See https://kripken.github.io/emscripten-site/docs/porting/pthreads.html -// for more information. -#ifdef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING -#error ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING cannot be directly set -#elif defined(_WIN32) || defined(__asmjs__) || defined(__wasm__) -#define ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING 1 -#endif - -#include <cstddef> - -#include "absl/base/port.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -class LowLevelAlloc { - public: - struct Arena; // an arena from which memory may be allocated - - // Returns a pointer to a block of at least "request" bytes - // that have been newly allocated from the specific arena. - // for Alloc() call the DefaultArena() is used. - // Returns 0 if passed request==0. - // Does not return 0 under other circumstances; it crashes if memory - // is not available. - static void *Alloc(size_t request) ABSL_ATTRIBUTE_SECTION(malloc_hook); - static void *AllocWithArena(size_t request, Arena *arena) - ABSL_ATTRIBUTE_SECTION(malloc_hook); - - // Deallocates a region of memory that was previously allocated with - // Alloc(). Does nothing if passed 0. "s" must be either 0, - // or must have been returned from a call to Alloc() and not yet passed to - // Free() since that call to Alloc(). The space is returned to the arena - // from which it was allocated. - static void Free(void *s) ABSL_ATTRIBUTE_SECTION(malloc_hook); - - // ABSL_ATTRIBUTE_SECTION(malloc_hook) for Alloc* and Free - // are to put all callers of MallocHook::Invoke* in this module - // into special section, - // so that MallocHook::GetCallerStackTrace can function accurately. - - // Create a new arena. - // The root metadata for the new arena is allocated in the - // meta_data_arena; the DefaultArena() can be passed for meta_data_arena. - // These values may be ored into flags: - enum { - // Report calls to Alloc() and Free() via the MallocHook interface. - // Set in the DefaultArena. - kCallMallocHook = 0x0001, - -#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING - // Make calls to Alloc(), Free() be async-signal-safe. Not set in - // DefaultArena(). Not supported on all platforms. - kAsyncSignalSafe = 0x0002, -#endif - }; - // Construct a new arena. The allocation of the underlying metadata honors - // the provided flags. For example, the call NewArena(kAsyncSignalSafe) - // is itself async-signal-safe, as well as generatating an arena that provides - // async-signal-safe Alloc/Free. - static Arena *NewArena(int32_t flags); - - // Destroys an arena allocated by NewArena and returns true, - // provided no allocated blocks remain in the arena. - // If allocated blocks remain in the arena, does nothing and - // returns false. - // It is illegal to attempt to destroy the DefaultArena(). - static bool DeleteArena(Arena *arena); - - // The default arena that always exists. - static Arena *DefaultArena(); - - private: - LowLevelAlloc(); // no instances -}; - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_LOW_LEVEL_ALLOC_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/low_level_alloc_test.cc b/third_party/abseil_cpp/absl/base/internal/low_level_alloc_test.cc deleted file mode 100644 index 2f2eaffa03..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/low_level_alloc_test.cc +++ /dev/null @@ -1,162 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/low_level_alloc.h" - -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> -#include <thread> // NOLINT(build/c++11) -#include <unordered_map> -#include <utility> - -#include "absl/container/node_hash_map.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { -namespace { - -// This test doesn't use gtest since it needs to test that everything -// works before main(). -#define TEST_ASSERT(x) \ - if (!(x)) { \ - printf("TEST_ASSERT(%s) FAILED ON LINE %d\n", #x, __LINE__); \ - abort(); \ - } - -// a block of memory obtained from the allocator -struct BlockDesc { - char *ptr; // pointer to memory - int len; // number of bytes - int fill; // filled with data starting with this -}; - -// Check that the pattern placed in the block d -// by RandomizeBlockDesc is still there. -static void CheckBlockDesc(const BlockDesc &d) { - for (int i = 0; i != d.len; i++) { - TEST_ASSERT((d.ptr[i] & 0xff) == ((d.fill + i) & 0xff)); - } -} - -// Fill the block "*d" with a pattern -// starting with a random byte. -static void RandomizeBlockDesc(BlockDesc *d) { - d->fill = rand() & 0xff; - for (int i = 0; i != d->len; i++) { - d->ptr[i] = (d->fill + i) & 0xff; - } -} - -// Use to indicate to the malloc hooks that -// this calls is from LowLevelAlloc. -static bool using_low_level_alloc = false; - -// n times, toss a coin, and based on the outcome -// either allocate a new block or deallocate an old block. -// New blocks are placed in a std::unordered_map with a random key -// and initialized with RandomizeBlockDesc(). -// If keys conflict, the older block is freed. -// Old blocks are always checked with CheckBlockDesc() -// before being freed. At the end of the run, -// all remaining allocated blocks are freed. -// If use_new_arena is true, use a fresh arena, and then delete it. -// If call_malloc_hook is true and user_arena is true, -// allocations and deallocations are reported via the MallocHook -// interface. -static void Test(bool use_new_arena, bool call_malloc_hook, int n) { - typedef absl::node_hash_map<int, BlockDesc> AllocMap; - AllocMap allocated; - AllocMap::iterator it; - BlockDesc block_desc; - int rnd; - LowLevelAlloc::Arena *arena = 0; - if (use_new_arena) { - int32_t flags = call_malloc_hook ? LowLevelAlloc::kCallMallocHook : 0; - arena = LowLevelAlloc::NewArena(flags); - } - for (int i = 0; i != n; i++) { - if (i != 0 && i % 10000 == 0) { - printf("."); - fflush(stdout); - } - - switch (rand() & 1) { // toss a coin - case 0: // coin came up heads: add a block - using_low_level_alloc = true; - block_desc.len = rand() & 0x3fff; - block_desc.ptr = - reinterpret_cast<char *>( - arena == 0 - ? LowLevelAlloc::Alloc(block_desc.len) - : LowLevelAlloc::AllocWithArena(block_desc.len, arena)); - using_low_level_alloc = false; - RandomizeBlockDesc(&block_desc); - rnd = rand(); - it = allocated.find(rnd); - if (it != allocated.end()) { - CheckBlockDesc(it->second); - using_low_level_alloc = true; - LowLevelAlloc::Free(it->second.ptr); - using_low_level_alloc = false; - it->second = block_desc; - } else { - allocated[rnd] = block_desc; - } - break; - case 1: // coin came up tails: remove a block - it = allocated.begin(); - if (it != allocated.end()) { - CheckBlockDesc(it->second); - using_low_level_alloc = true; - LowLevelAlloc::Free(it->second.ptr); - using_low_level_alloc = false; - allocated.erase(it); - } - break; - } - } - // remove all remaining blocks - while ((it = allocated.begin()) != allocated.end()) { - CheckBlockDesc(it->second); - using_low_level_alloc = true; - LowLevelAlloc::Free(it->second.ptr); - using_low_level_alloc = false; - allocated.erase(it); - } - if (use_new_arena) { - TEST_ASSERT(LowLevelAlloc::DeleteArena(arena)); - } -} - -// LowLevelAlloc is designed to be safe to call before main(). -static struct BeforeMain { - BeforeMain() { - Test(false, false, 50000); - Test(true, false, 50000); - Test(true, true, 50000); - } -} before_main; - -} // namespace -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -int main(int argc, char *argv[]) { - // The actual test runs in the global constructor of `before_main`. - printf("PASS\n"); - return 0; -} diff --git a/third_party/abseil_cpp/absl/base/internal/low_level_scheduling.h b/third_party/abseil_cpp/absl/base/internal/low_level_scheduling.h deleted file mode 100644 index 961cc981b8..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/low_level_scheduling.h +++ /dev/null @@ -1,107 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// Core interfaces and definitions used by by low-level interfaces such as -// SpinLock. - -#ifndef ABSL_BASE_INTERNAL_LOW_LEVEL_SCHEDULING_H_ -#define ABSL_BASE_INTERNAL_LOW_LEVEL_SCHEDULING_H_ - -#include "absl/base/internal/scheduling_mode.h" -#include "absl/base/macros.h" - -// The following two declarations exist so SchedulingGuard may friend them with -// the appropriate language linkage. These callbacks allow libc internals, such -// as function level statics, to schedule cooperatively when locking. -extern "C" bool __google_disable_rescheduling(void); -extern "C" void __google_enable_rescheduling(bool disable_result); - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -class SchedulingHelper; // To allow use of SchedulingGuard. -class SpinLock; // To allow use of SchedulingGuard. - -// SchedulingGuard -// Provides guard semantics that may be used to disable cooperative rescheduling -// of the calling thread within specific program blocks. This is used to -// protect resources (e.g. low-level SpinLocks or Domain code) that cooperative -// scheduling depends on. -// -// Domain implementations capable of rescheduling in reaction to involuntary -// kernel thread actions (e.g blocking due to a pagefault or syscall) must -// guarantee that an annotated thread is not allowed to (cooperatively) -// reschedule until the annotated region is complete. -// -// It is an error to attempt to use a cooperatively scheduled resource (e.g. -// Mutex) within a rescheduling-disabled region. -// -// All methods are async-signal safe. -class SchedulingGuard { - public: - // Returns true iff the calling thread may be cooperatively rescheduled. - static bool ReschedulingIsAllowed(); - - private: - // Disable cooperative rescheduling of the calling thread. It may still - // initiate scheduling operations (e.g. wake-ups), however, it may not itself - // reschedule. Nestable. The returned result is opaque, clients should not - // attempt to interpret it. - // REQUIRES: Result must be passed to a pairing EnableScheduling(). - static bool DisableRescheduling(); - - // Marks the end of a rescheduling disabled region, previously started by - // DisableRescheduling(). - // REQUIRES: Pairs with innermost call (and result) of DisableRescheduling(). - static void EnableRescheduling(bool disable_result); - - // A scoped helper for {Disable, Enable}Rescheduling(). - // REQUIRES: destructor must run in same thread as constructor. - struct ScopedDisable { - ScopedDisable() { disabled = SchedulingGuard::DisableRescheduling(); } - ~ScopedDisable() { SchedulingGuard::EnableRescheduling(disabled); } - - bool disabled; - }; - - // Access to SchedulingGuard is explicitly white-listed. - friend class SchedulingHelper; - friend class SpinLock; - - SchedulingGuard(const SchedulingGuard&) = delete; - SchedulingGuard& operator=(const SchedulingGuard&) = delete; -}; - -//------------------------------------------------------------------------------ -// End of public interfaces. -//------------------------------------------------------------------------------ - -inline bool SchedulingGuard::ReschedulingIsAllowed() { - return false; -} - -inline bool SchedulingGuard::DisableRescheduling() { - return false; -} - -inline void SchedulingGuard::EnableRescheduling(bool /* disable_result */) { - return; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_LOW_LEVEL_SCHEDULING_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/per_thread_tls.h b/third_party/abseil_cpp/absl/base/internal/per_thread_tls.h deleted file mode 100644 index cf5e97a047..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/per_thread_tls.h +++ /dev/null @@ -1,52 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_ -#define ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_ - -// This header defines two macros: -// -// If the platform supports thread-local storage: -// -// * ABSL_PER_THREAD_TLS_KEYWORD is the C keyword needed to declare a -// thread-local variable -// * ABSL_PER_THREAD_TLS is 1 -// -// Otherwise: -// -// * ABSL_PER_THREAD_TLS_KEYWORD is empty -// * ABSL_PER_THREAD_TLS is 0 -// -// Microsoft C supports thread-local storage. -// GCC supports it if the appropriate version of glibc is available, -// which the programmer can indicate by defining ABSL_HAVE_TLS - -#include "absl/base/port.h" // For ABSL_HAVE_TLS - -#if defined(ABSL_PER_THREAD_TLS) -#error ABSL_PER_THREAD_TLS cannot be directly set -#elif defined(ABSL_PER_THREAD_TLS_KEYWORD) -#error ABSL_PER_THREAD_TLS_KEYWORD cannot be directly set -#elif defined(ABSL_HAVE_TLS) -#define ABSL_PER_THREAD_TLS_KEYWORD __thread -#define ABSL_PER_THREAD_TLS 1 -#elif defined(_MSC_VER) -#define ABSL_PER_THREAD_TLS_KEYWORD __declspec(thread) -#define ABSL_PER_THREAD_TLS 1 -#else -#define ABSL_PER_THREAD_TLS_KEYWORD -#define ABSL_PER_THREAD_TLS 0 -#endif - -#endif // ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/periodic_sampler.cc b/third_party/abseil_cpp/absl/base/internal/periodic_sampler.cc deleted file mode 100644 index 520dabbaa0..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/periodic_sampler.cc +++ /dev/null @@ -1,53 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/periodic_sampler.h" - -#include <atomic> - -#include "absl/base/internal/exponential_biased.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -int64_t PeriodicSamplerBase::GetExponentialBiased(int period) noexcept { - return rng_.GetStride(period); -} - -bool PeriodicSamplerBase::SubtleConfirmSample() noexcept { - int current_period = period(); - - // Deal with period case 0 (always off) and 1 (always on) - if (ABSL_PREDICT_FALSE(current_period < 2)) { - stride_ = 0; - return current_period == 1; - } - - // Check if this is the first call to Sample() - if (ABSL_PREDICT_FALSE(stride_ == 1)) { - stride_ = static_cast<uint64_t>(-GetExponentialBiased(current_period)); - if (static_cast<int64_t>(stride_) < -1) { - ++stride_; - return false; - } - } - - stride_ = static_cast<uint64_t>(-GetExponentialBiased(current_period)); - return true; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/periodic_sampler.h b/third_party/abseil_cpp/absl/base/internal/periodic_sampler.h deleted file mode 100644 index f8a86796b1..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/periodic_sampler.h +++ /dev/null @@ -1,211 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_PERIODIC_SAMPLER_H_ -#define ABSL_BASE_INTERNAL_PERIODIC_SAMPLER_H_ - -#include <stdint.h> - -#include <atomic> - -#include "absl/base/internal/exponential_biased.h" -#include "absl/base/optimization.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// PeriodicSamplerBase provides the basic period sampler implementation. -// -// This is the base class for the templated PeriodicSampler class, which holds -// a global std::atomic value identified by a user defined tag, such that -// each specific PeriodSampler implementation holds its own global period. -// -// PeriodicSamplerBase is thread-compatible except where stated otherwise. -class PeriodicSamplerBase { - public: - // PeriodicSamplerBase is trivial / copyable / movable / destructible. - PeriodicSamplerBase() = default; - PeriodicSamplerBase(PeriodicSamplerBase&&) = default; - PeriodicSamplerBase(const PeriodicSamplerBase&) = default; - - // Returns true roughly once every `period` calls. This is established by a - // randomly picked `stride` that is counted down on each call to `Sample`. - // This stride is picked such that the probability of `Sample()` returning - // true is 1 in `period`. - inline bool Sample() noexcept; - - // The below methods are intended for optimized use cases where the - // size of the inlined fast path code is highly important. Applications - // should use the `Sample()` method unless they have proof that their - // specific use case requires the optimizations offered by these methods. - // - // An example of such a use case is SwissTable sampling. All sampling checks - // are in inlined SwissTable methods, and the number of call sites is huge. - // In this case, the inlined code size added to each translation unit calling - // SwissTable methods is non-trivial. - // - // The `SubtleMaybeSample()` function spuriously returns true even if the - // function should not be sampled, applications MUST match each call to - // 'SubtleMaybeSample()' returning true with a `SubtleConfirmSample()` call, - // and use the result of the latter as the sampling decision. - // In other words: the code should logically be equivalent to: - // - // if (SubtleMaybeSample() && SubtleConfirmSample()) { - // // Sample this call - // } - // - // In the 'inline-size' optimized case, the `SubtleConfirmSample()` call can - // be placed out of line, for example, the typical use case looks as follows: - // - // // --- frobber.h ----------- - // void FrobberSampled(); - // - // inline void FrobberImpl() { - // // ... - // } - // - // inline void Frobber() { - // if (ABSL_PREDICT_FALSE(sampler.SubtleMaybeSample())) { - // FrobberSampled(); - // } else { - // FrobberImpl(); - // } - // } - // - // // --- frobber.cc ----------- - // void FrobberSampled() { - // if (!sampler.SubtleConfirmSample())) { - // // Spurious false positive - // FrobberImpl(); - // return; - // } - // - // // Sampled execution - // // ... - // } - inline bool SubtleMaybeSample() noexcept; - bool SubtleConfirmSample() noexcept; - - protected: - // We explicitly don't use a virtual destructor as this class is never - // virtually destroyed, and it keeps the class trivial, which avoids TLS - // prologue and epilogue code for our TLS instances. - ~PeriodicSamplerBase() = default; - - // Returns the next stride for our sampler. - // This function is virtual for testing purposes only. - virtual int64_t GetExponentialBiased(int period) noexcept; - - private: - // Returns the current period of this sampler. Thread-safe. - virtual int period() const noexcept = 0; - - // Keep and decrement stride_ as an unsigned integer, but compare the value - // to zero casted as a signed int. clang and msvc do not create optimum code - // if we use signed for the combined decrement and sign comparison. - // - // Below 3 alternative options, all compiles generate the best code - // using the unsigned increment <---> signed int comparison option. - // - // Option 1: - // int64_t stride_; - // if (ABSL_PREDICT_TRUE(++stride_ < 0)) { ... } - // - // GCC x64 (OK) : https://gcc.godbolt.org/z/R5MzzA - // GCC ppc (OK) : https://gcc.godbolt.org/z/z7NZAt - // Clang x64 (BAD): https://gcc.godbolt.org/z/t4gPsd - // ICC x64 (OK) : https://gcc.godbolt.org/z/rE6s8W - // MSVC x64 (OK) : https://gcc.godbolt.org/z/ARMXqS - // - // Option 2: - // int64_t stride_ = 0; - // if (ABSL_PREDICT_TRUE(--stride_ >= 0)) { ... } - // - // GCC x64 (OK) : https://gcc.godbolt.org/z/jSQxYK - // GCC ppc (OK) : https://gcc.godbolt.org/z/VJdYaA - // Clang x64 (BAD): https://gcc.godbolt.org/z/Xm4NjX - // ICC x64 (OK) : https://gcc.godbolt.org/z/4snaFd - // MSVC x64 (BAD): https://gcc.godbolt.org/z/BgnEKE - // - // Option 3: - // uint64_t stride_; - // if (ABSL_PREDICT_TRUE(static_cast<int64_t>(++stride_) < 0)) { ... } - // - // GCC x64 (OK) : https://gcc.godbolt.org/z/bFbfPy - // GCC ppc (OK) : https://gcc.godbolt.org/z/S9KkUE - // Clang x64 (OK) : https://gcc.godbolt.org/z/UYzRb4 - // ICC x64 (OK) : https://gcc.godbolt.org/z/ptTNfD - // MSVC x64 (OK) : https://gcc.godbolt.org/z/76j4-5 - uint64_t stride_ = 0; - ExponentialBiased rng_; -}; - -inline bool PeriodicSamplerBase::SubtleMaybeSample() noexcept { - // See comments on `stride_` for the unsigned increment / signed compare. - if (ABSL_PREDICT_TRUE(static_cast<int64_t>(++stride_) < 0)) { - return false; - } - return true; -} - -inline bool PeriodicSamplerBase::Sample() noexcept { - return ABSL_PREDICT_FALSE(SubtleMaybeSample()) ? SubtleConfirmSample() - : false; -} - -// PeriodicSampler is a concreted periodic sampler implementation. -// The user provided Tag identifies the implementation, and is required to -// isolate the global state of this instance from other instances. -// -// Typical use case: -// -// struct HashTablezTag {}; -// thread_local PeriodicSampler sampler; -// -// void HashTableSamplingLogic(...) { -// if (sampler.Sample()) { -// HashTableSlowSamplePath(...); -// } -// } -// -template <typename Tag, int default_period = 0> -class PeriodicSampler final : public PeriodicSamplerBase { - public: - ~PeriodicSampler() = default; - - int period() const noexcept final { - return period_.load(std::memory_order_relaxed); - } - - // Sets the global period for this sampler. Thread-safe. - // Setting a period of 0 disables the sampler, i.e., every call to Sample() - // will return false. Setting a period of 1 puts the sampler in 'always on' - // mode, i.e., every call to Sample() returns true. - static void SetGlobalPeriod(int period) { - period_.store(period, std::memory_order_relaxed); - } - - private: - static std::atomic<int> period_; -}; - -template <typename Tag, int default_period> -std::atomic<int> PeriodicSampler<Tag, default_period>::period_(default_period); - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_PERIODIC_SAMPLER_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/periodic_sampler_benchmark.cc b/third_party/abseil_cpp/absl/base/internal/periodic_sampler_benchmark.cc deleted file mode 100644 index 5ad469ce79..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/periodic_sampler_benchmark.cc +++ /dev/null @@ -1,79 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "benchmark/benchmark.h" -#include "absl/base/internal/periodic_sampler.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { -namespace { - -template <typename Sampler> -void BM_Sample(Sampler* sampler, benchmark::State& state) { - for (auto _ : state) { - benchmark::DoNotOptimize(sampler); - benchmark::DoNotOptimize(sampler->Sample()); - } -} - -template <typename Sampler> -void BM_SampleMinunumInlined(Sampler* sampler, benchmark::State& state) { - for (auto _ : state) { - benchmark::DoNotOptimize(sampler); - if (ABSL_PREDICT_FALSE(sampler->SubtleMaybeSample())) { - benchmark::DoNotOptimize(sampler->SubtleConfirmSample()); - } - } -} - -void BM_PeriodicSampler_TinySample(benchmark::State& state) { - struct Tag {}; - PeriodicSampler<Tag, 10> sampler; - BM_Sample(&sampler, state); -} -BENCHMARK(BM_PeriodicSampler_TinySample); - -void BM_PeriodicSampler_ShortSample(benchmark::State& state) { - struct Tag {}; - PeriodicSampler<Tag, 1024> sampler; - BM_Sample(&sampler, state); -} -BENCHMARK(BM_PeriodicSampler_ShortSample); - -void BM_PeriodicSampler_LongSample(benchmark::State& state) { - struct Tag {}; - PeriodicSampler<Tag, 1024 * 1024> sampler; - BM_Sample(&sampler, state); -} -BENCHMARK(BM_PeriodicSampler_LongSample); - -void BM_PeriodicSampler_LongSampleMinunumInlined(benchmark::State& state) { - struct Tag {}; - PeriodicSampler<Tag, 1024 * 1024> sampler; - BM_SampleMinunumInlined(&sampler, state); -} -BENCHMARK(BM_PeriodicSampler_LongSampleMinunumInlined); - -void BM_PeriodicSampler_Disabled(benchmark::State& state) { - struct Tag {}; - PeriodicSampler<Tag, 0> sampler; - BM_Sample(&sampler, state); -} -BENCHMARK(BM_PeriodicSampler_Disabled); - -} // namespace -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/periodic_sampler_test.cc b/third_party/abseil_cpp/absl/base/internal/periodic_sampler_test.cc deleted file mode 100644 index 3b301e37ab..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/periodic_sampler_test.cc +++ /dev/null @@ -1,177 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/periodic_sampler.h" - -#include <thread> // NOLINT(build/c++11) - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/base/attributes.h" -#include "absl/base/macros.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { -namespace { - -using testing::Eq; -using testing::Return; -using testing::StrictMock; - -class MockPeriodicSampler : public PeriodicSamplerBase { - public: - virtual ~MockPeriodicSampler() = default; - - MOCK_METHOD(int, period, (), (const, noexcept)); - MOCK_METHOD(int64_t, GetExponentialBiased, (int), (noexcept)); -}; - -TEST(PeriodicSamplerBaseTest, Sample) { - StrictMock<MockPeriodicSampler> sampler; - - EXPECT_CALL(sampler, period()).Times(3).WillRepeatedly(Return(16)); - EXPECT_CALL(sampler, GetExponentialBiased(16)) - .WillOnce(Return(2)) - .WillOnce(Return(3)) - .WillOnce(Return(4)); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_TRUE(sampler.Sample()); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); - EXPECT_TRUE(sampler.Sample()); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); -} - -TEST(PeriodicSamplerBaseTest, ImmediatelySample) { - StrictMock<MockPeriodicSampler> sampler; - - EXPECT_CALL(sampler, period()).Times(2).WillRepeatedly(Return(16)); - EXPECT_CALL(sampler, GetExponentialBiased(16)) - .WillOnce(Return(1)) - .WillOnce(Return(2)) - .WillOnce(Return(3)); - - EXPECT_TRUE(sampler.Sample()); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_TRUE(sampler.Sample()); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); -} - -TEST(PeriodicSamplerBaseTest, Disabled) { - StrictMock<MockPeriodicSampler> sampler; - - EXPECT_CALL(sampler, period()).Times(3).WillRepeatedly(Return(0)); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); -} - -TEST(PeriodicSamplerBaseTest, AlwaysOn) { - StrictMock<MockPeriodicSampler> sampler; - - EXPECT_CALL(sampler, period()).Times(3).WillRepeatedly(Return(1)); - - EXPECT_TRUE(sampler.Sample()); - EXPECT_TRUE(sampler.Sample()); - EXPECT_TRUE(sampler.Sample()); -} - -TEST(PeriodicSamplerBaseTest, Disable) { - StrictMock<MockPeriodicSampler> sampler; - - EXPECT_CALL(sampler, period()).WillOnce(Return(16)); - EXPECT_CALL(sampler, GetExponentialBiased(16)).WillOnce(Return(3)); - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); - - EXPECT_CALL(sampler, period()).Times(2).WillRepeatedly(Return(0)); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); -} - -TEST(PeriodicSamplerBaseTest, Enable) { - StrictMock<MockPeriodicSampler> sampler; - - EXPECT_CALL(sampler, period()).WillOnce(Return(0)); - EXPECT_FALSE(sampler.Sample()); - - EXPECT_CALL(sampler, period()).Times(2).WillRepeatedly(Return(16)); - EXPECT_CALL(sampler, GetExponentialBiased(16)) - .Times(2) - .WillRepeatedly(Return(3)); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); - EXPECT_TRUE(sampler.Sample()); - - EXPECT_FALSE(sampler.Sample()); - EXPECT_FALSE(sampler.Sample()); -} - -TEST(PeriodicSamplerTest, ConstructConstInit) { - struct Tag {}; - ABSL_CONST_INIT static PeriodicSampler<Tag> sampler; - (void)sampler; -} - -TEST(PeriodicSamplerTest, DefaultPeriod0) { - struct Tag {}; - PeriodicSampler<Tag> sampler; - EXPECT_THAT(sampler.period(), Eq(0)); -} - -TEST(PeriodicSamplerTest, DefaultPeriod) { - struct Tag {}; - PeriodicSampler<Tag, 100> sampler; - EXPECT_THAT(sampler.period(), Eq(100)); -} - -TEST(PeriodicSamplerTest, SetGlobalPeriod) { - struct Tag1 {}; - struct Tag2 {}; - PeriodicSampler<Tag1, 25> sampler1; - PeriodicSampler<Tag2, 50> sampler2; - - EXPECT_THAT(sampler1.period(), Eq(25)); - EXPECT_THAT(sampler2.period(), Eq(50)); - - std::thread thread([] { - PeriodicSampler<Tag1, 25> sampler1; - PeriodicSampler<Tag2, 50> sampler2; - EXPECT_THAT(sampler1.period(), Eq(25)); - EXPECT_THAT(sampler2.period(), Eq(50)); - sampler1.SetGlobalPeriod(10); - sampler2.SetGlobalPeriod(20); - }); - thread.join(); - - EXPECT_THAT(sampler1.period(), Eq(10)); - EXPECT_THAT(sampler2.period(), Eq(20)); -} - -} // namespace -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/pretty_function.h b/third_party/abseil_cpp/absl/base/internal/pretty_function.h deleted file mode 100644 index 35d51676dc..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/pretty_function.h +++ /dev/null @@ -1,33 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_ -#define ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_ - -// ABSL_PRETTY_FUNCTION -// -// In C++11, __func__ gives the undecorated name of the current function. That -// is, "main", not "int main()". Various compilers give extra macros to get the -// decorated function name, including return type and arguments, to -// differentiate between overload sets. ABSL_PRETTY_FUNCTION is a portable -// version of these macros which forwards to the correct macro on each compiler. -#if defined(_MSC_VER) -#define ABSL_PRETTY_FUNCTION __FUNCSIG__ -#elif defined(__GNUC__) -#define ABSL_PRETTY_FUNCTION __PRETTY_FUNCTION__ -#else -#error "Unsupported compiler" -#endif - -#endif // ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/raw_logging.cc b/third_party/abseil_cpp/absl/base/internal/raw_logging.cc deleted file mode 100644 index 40cea55061..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/raw_logging.cc +++ /dev/null @@ -1,240 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/raw_logging.h" - -#include <stddef.h> -#include <cstdarg> -#include <cstdio> -#include <cstdlib> -#include <cstring> - -#include "absl/base/attributes.h" -#include "absl/base/config.h" -#include "absl/base/internal/atomic_hook.h" -#include "absl/base/log_severity.h" - -// We know how to perform low-level writes to stderr in POSIX and Windows. For -// these platforms, we define the token ABSL_LOW_LEVEL_WRITE_SUPPORTED. -// Much of raw_logging.cc becomes a no-op when we can't output messages, -// although a FATAL ABSL_RAW_LOG message will still abort the process. - -// ABSL_HAVE_POSIX_WRITE is defined when the platform provides posix write() -// (as from unistd.h) -// -// This preprocessor token is also defined in raw_io.cc. If you need to copy -// this, consider moving both to config.h instead. -#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \ - defined(__Fuchsia__) || defined(__native_client__) || \ - defined(__EMSCRIPTEN__) || defined(__ASYLO__) - -#include <unistd.h> - -#define ABSL_HAVE_POSIX_WRITE 1 -#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1 -#else -#undef ABSL_HAVE_POSIX_WRITE -#endif - -// ABSL_HAVE_SYSCALL_WRITE is defined when the platform provides the syscall -// syscall(SYS_write, /*int*/ fd, /*char* */ buf, /*size_t*/ len); -// for low level operations that want to avoid libc. -#if (defined(__linux__) || defined(__FreeBSD__)) && !defined(__ANDROID__) -#include <sys/syscall.h> -#define ABSL_HAVE_SYSCALL_WRITE 1 -#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1 -#else -#undef ABSL_HAVE_SYSCALL_WRITE -#endif - -#ifdef _WIN32 -#include <io.h> - -#define ABSL_HAVE_RAW_IO 1 -#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1 -#else -#undef ABSL_HAVE_RAW_IO -#endif - -// TODO(gfalcon): We want raw-logging to work on as many platforms as possible. -// Explicitly #error out when not ABSL_LOW_LEVEL_WRITE_SUPPORTED, except for a -// whitelisted set of platforms for which we expect not to be able to raw log. - -ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook< - absl::raw_logging_internal::LogPrefixHook> - log_prefix_hook; -ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook< - absl::raw_logging_internal::AbortHook> - abort_hook; - -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED -static const char kTruncated[] = " ... (message truncated)\n"; - -// sprintf the format to the buffer, adjusting *buf and *size to reflect the -// consumed bytes, and return whether the message fit without truncation. If -// truncation occurred, if possible leave room in the buffer for the message -// kTruncated[]. -inline static bool VADoRawLog(char** buf, int* size, const char* format, - va_list ap) ABSL_PRINTF_ATTRIBUTE(3, 0); -inline static bool VADoRawLog(char** buf, int* size, - const char* format, va_list ap) { - int n = vsnprintf(*buf, *size, format, ap); - bool result = true; - if (n < 0 || n > *size) { - result = false; - if (static_cast<size_t>(*size) > sizeof(kTruncated)) { - n = *size - sizeof(kTruncated); // room for truncation message - } else { - n = 0; // no room for truncation message - } - } - *size -= n; - *buf += n; - return result; -} -#endif // ABSL_LOW_LEVEL_WRITE_SUPPORTED - -static constexpr int kLogBufSize = 3000; - -namespace { - -// CAVEAT: vsnprintf called from *DoRawLog below has some (exotic) code paths -// that invoke malloc() and getenv() that might acquire some locks. - -// Helper for RawLog below. -// *DoRawLog writes to *buf of *size and move them past the written portion. -// It returns true iff there was no overflow or error. -bool DoRawLog(char** buf, int* size, const char* format, ...) - ABSL_PRINTF_ATTRIBUTE(3, 4); -bool DoRawLog(char** buf, int* size, const char* format, ...) { - va_list ap; - va_start(ap, format); - int n = vsnprintf(*buf, *size, format, ap); - va_end(ap); - if (n < 0 || n > *size) return false; - *size -= n; - *buf += n; - return true; -} - -void RawLogVA(absl::LogSeverity severity, const char* file, int line, - const char* format, va_list ap) ABSL_PRINTF_ATTRIBUTE(4, 0); -void RawLogVA(absl::LogSeverity severity, const char* file, int line, - const char* format, va_list ap) { - char buffer[kLogBufSize]; - char* buf = buffer; - int size = sizeof(buffer); -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED - bool enabled = true; -#else - bool enabled = false; -#endif - -#ifdef ABSL_MIN_LOG_LEVEL - if (severity < static_cast<absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) && - severity < absl::LogSeverity::kFatal) { - enabled = false; - } -#endif - - auto log_prefix_hook_ptr = log_prefix_hook.Load(); - if (log_prefix_hook_ptr) { - enabled = log_prefix_hook_ptr(severity, file, line, &buf, &size); - } else { - if (enabled) { - DoRawLog(&buf, &size, "[%s : %d] RAW: ", file, line); - } - } - const char* const prefix_end = buf; - -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED - if (enabled) { - bool no_chop = VADoRawLog(&buf, &size, format, ap); - if (no_chop) { - DoRawLog(&buf, &size, "\n"); - } else { - DoRawLog(&buf, &size, "%s", kTruncated); - } - absl::raw_logging_internal::SafeWriteToStderr(buffer, strlen(buffer)); - } -#else - static_cast<void>(format); - static_cast<void>(ap); -#endif - - // Abort the process after logging a FATAL message, even if the output itself - // was suppressed. - if (severity == absl::LogSeverity::kFatal) { - abort_hook(file, line, buffer, prefix_end, buffer + kLogBufSize); - abort(); - } -} - -} // namespace - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace raw_logging_internal { -void SafeWriteToStderr(const char *s, size_t len) { -#if defined(ABSL_HAVE_SYSCALL_WRITE) - syscall(SYS_write, STDERR_FILENO, s, len); -#elif defined(ABSL_HAVE_POSIX_WRITE) - write(STDERR_FILENO, s, len); -#elif defined(ABSL_HAVE_RAW_IO) - _write(/* stderr */ 2, s, len); -#else - // stderr logging unsupported on this platform - (void) s; - (void) len; -#endif -} - -void RawLog(absl::LogSeverity severity, const char* file, int line, - const char* format, ...) ABSL_PRINTF_ATTRIBUTE(4, 5); -void RawLog(absl::LogSeverity severity, const char* file, int line, - const char* format, ...) { - va_list ap; - va_start(ap, format); - RawLogVA(severity, file, line, format, ap); - va_end(ap); -} - -// Non-formatting version of RawLog(). -// -// TODO(gfalcon): When string_view no longer depends on base, change this -// interface to take its message as a string_view instead. -static void DefaultInternalLog(absl::LogSeverity severity, const char* file, - int line, const std::string& message) { - RawLog(severity, file, line, "%s", message.c_str()); -} - -bool RawLoggingFullySupported() { -#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED - return true; -#else // !ABSL_LOW_LEVEL_WRITE_SUPPORTED - return false; -#endif // !ABSL_LOW_LEVEL_WRITE_SUPPORTED -} - -ABSL_DLL ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES - absl::base_internal::AtomicHook<InternalLogFunction> - internal_log_function(DefaultInternalLog); - -void RegisterInternalLogFunction(InternalLogFunction func) { - internal_log_function.Store(func); -} - -} // namespace raw_logging_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/raw_logging.h b/third_party/abseil_cpp/absl/base/internal/raw_logging.h deleted file mode 100644 index 418d6c856f..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/raw_logging.h +++ /dev/null @@ -1,183 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// Thread-safe logging routines that do not allocate any memory or -// acquire any locks, and can therefore be used by low-level memory -// allocation, synchronization, and signal-handling code. - -#ifndef ABSL_BASE_INTERNAL_RAW_LOGGING_H_ -#define ABSL_BASE_INTERNAL_RAW_LOGGING_H_ - -#include <string> - -#include "absl/base/attributes.h" -#include "absl/base/config.h" -#include "absl/base/internal/atomic_hook.h" -#include "absl/base/log_severity.h" -#include "absl/base/macros.h" -#include "absl/base/optimization.h" -#include "absl/base/port.h" - -// This is similar to LOG(severity) << format..., but -// * it is to be used ONLY by low-level modules that can't use normal LOG() -// * it is designed to be a low-level logger that does not allocate any -// memory and does not need any locks, hence: -// * it logs straight and ONLY to STDERR w/o buffering -// * it uses an explicit printf-format and arguments list -// * it will silently chop off really long message strings -// Usage example: -// ABSL_RAW_LOG(ERROR, "Failed foo with %i: %s", status, error); -// This will print an almost standard log line like this to stderr only: -// E0821 211317 file.cc:123] RAW: Failed foo with 22: bad_file - -#define ABSL_RAW_LOG(severity, ...) \ - do { \ - constexpr const char* absl_raw_logging_internal_basename = \ - ::absl::raw_logging_internal::Basename(__FILE__, \ - sizeof(__FILE__) - 1); \ - ::absl::raw_logging_internal::RawLog(ABSL_RAW_LOGGING_INTERNAL_##severity, \ - absl_raw_logging_internal_basename, \ - __LINE__, __VA_ARGS__); \ - } while (0) - -// Similar to CHECK(condition) << message, but for low-level modules: -// we use only ABSL_RAW_LOG that does not allocate memory. -// We do not want to provide args list here to encourage this usage: -// if (!cond) ABSL_RAW_LOG(FATAL, "foo ...", hard_to_compute_args); -// so that the args are not computed when not needed. -#define ABSL_RAW_CHECK(condition, message) \ - do { \ - if (ABSL_PREDICT_FALSE(!(condition))) { \ - ABSL_RAW_LOG(FATAL, "Check %s failed: %s", #condition, message); \ - } \ - } while (0) - -// ABSL_INTERNAL_LOG and ABSL_INTERNAL_CHECK work like the RAW variants above, -// except that if the richer log library is linked into the binary, we dispatch -// to that instead. This is potentially useful for internal logging and -// assertions, where we are using RAW_LOG neither for its async-signal-safety -// nor for its non-allocating nature, but rather because raw logging has very -// few other dependencies. -// -// The API is a subset of the above: each macro only takes two arguments. Use -// StrCat if you need to build a richer message. -#define ABSL_INTERNAL_LOG(severity, message) \ - do { \ - ::absl::raw_logging_internal::internal_log_function( \ - ABSL_RAW_LOGGING_INTERNAL_##severity, __FILE__, __LINE__, message); \ - } while (0) - -#define ABSL_INTERNAL_CHECK(condition, message) \ - do { \ - if (ABSL_PREDICT_FALSE(!(condition))) { \ - std::string death_message = "Check " #condition " failed: "; \ - death_message += std::string(message); \ - ABSL_INTERNAL_LOG(FATAL, death_message); \ - } \ - } while (0) - -#define ABSL_RAW_LOGGING_INTERNAL_INFO ::absl::LogSeverity::kInfo -#define ABSL_RAW_LOGGING_INTERNAL_WARNING ::absl::LogSeverity::kWarning -#define ABSL_RAW_LOGGING_INTERNAL_ERROR ::absl::LogSeverity::kError -#define ABSL_RAW_LOGGING_INTERNAL_FATAL ::absl::LogSeverity::kFatal -#define ABSL_RAW_LOGGING_INTERNAL_LEVEL(severity) \ - ::absl::NormalizeLogSeverity(severity) - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace raw_logging_internal { - -// Helper function to implement ABSL_RAW_LOG -// Logs format... at "severity" level, reporting it -// as called from file:line. -// This does not allocate memory or acquire locks. -void RawLog(absl::LogSeverity severity, const char* file, int line, - const char* format, ...) ABSL_PRINTF_ATTRIBUTE(4, 5); - -// Writes the provided buffer directly to stderr, in a safe, low-level manner. -// -// In POSIX this means calling write(), which is async-signal safe and does -// not malloc. If the platform supports the SYS_write syscall, we invoke that -// directly to side-step any libc interception. -void SafeWriteToStderr(const char *s, size_t len); - -// compile-time function to get the "base" filename, that is, the part of -// a filename after the last "/" or "\" path separator. The search starts at -// the end of the string; the second parameter is the length of the string. -constexpr const char* Basename(const char* fname, int offset) { - return offset == 0 || fname[offset - 1] == '/' || fname[offset - 1] == '\\' - ? fname + offset - : Basename(fname, offset - 1); -} - -// For testing only. -// Returns true if raw logging is fully supported. When it is not -// fully supported, no messages will be emitted, but a log at FATAL -// severity will cause an abort. -// -// TODO(gfalcon): Come up with a better name for this method. -bool RawLoggingFullySupported(); - -// Function type for a raw_logging customization hook for suppressing messages -// by severity, and for writing custom prefixes on non-suppressed messages. -// -// The installed hook is called for every raw log invocation. The message will -// be logged to stderr only if the hook returns true. FATAL errors will cause -// the process to abort, even if writing to stderr is suppressed. The hook is -// also provided with an output buffer, where it can write a custom log message -// prefix. -// -// The raw_logging system does not allocate memory or grab locks. User-provided -// hooks must avoid these operations, and must not throw exceptions. -// -// 'severity' is the severity level of the message being written. -// 'file' and 'line' are the file and line number where the ABSL_RAW_LOG macro -// was located. -// 'buffer' and 'buf_size' are pointers to the buffer and buffer size. If the -// hook writes a prefix, it must increment *buffer and decrement *buf_size -// accordingly. -using LogPrefixHook = bool (*)(absl::LogSeverity severity, const char* file, - int line, char** buffer, int* buf_size); - -// Function type for a raw_logging customization hook called to abort a process -// when a FATAL message is logged. If the provided AbortHook() returns, the -// logging system will call abort(). -// -// 'file' and 'line' are the file and line number where the ABSL_RAW_LOG macro -// was located. -// The NUL-terminated logged message lives in the buffer between 'buf_start' -// and 'buf_end'. 'prefix_end' points to the first non-prefix character of the -// buffer (as written by the LogPrefixHook.) -using AbortHook = void (*)(const char* file, int line, const char* buf_start, - const char* prefix_end, const char* buf_end); - -// Internal logging function for ABSL_INTERNAL_LOG to dispatch to. -// -// TODO(gfalcon): When string_view no longer depends on base, change this -// interface to take its message as a string_view instead. -using InternalLogFunction = void (*)(absl::LogSeverity severity, - const char* file, int line, - const std::string& message); - -ABSL_DLL ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES extern base_internal::AtomicHook< - InternalLogFunction> - internal_log_function; - -void RegisterInternalLogFunction(InternalLogFunction func); - -} // namespace raw_logging_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_RAW_LOGGING_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/scheduling_mode.h b/third_party/abseil_cpp/absl/base/internal/scheduling_mode.h deleted file mode 100644 index 8be5ab6dd3..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/scheduling_mode.h +++ /dev/null @@ -1,58 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// Core interfaces and definitions used by by low-level interfaces such as -// SpinLock. - -#ifndef ABSL_BASE_INTERNAL_SCHEDULING_MODE_H_ -#define ABSL_BASE_INTERNAL_SCHEDULING_MODE_H_ - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// Used to describe how a thread may be scheduled. Typically associated with -// the declaration of a resource supporting synchronized access. -// -// SCHEDULE_COOPERATIVE_AND_KERNEL: -// Specifies that when waiting, a cooperative thread (e.g. a Fiber) may -// reschedule (using base::scheduling semantics); allowing other cooperative -// threads to proceed. -// -// SCHEDULE_KERNEL_ONLY: (Also described as "non-cooperative") -// Specifies that no cooperative scheduling semantics may be used, even if the -// current thread is itself cooperatively scheduled. This means that -// cooperative threads will NOT allow other cooperative threads to execute in -// their place while waiting for a resource of this type. Host operating system -// semantics (e.g. a futex) may still be used. -// -// When optional, clients should strongly prefer SCHEDULE_COOPERATIVE_AND_KERNEL -// by default. SCHEDULE_KERNEL_ONLY should only be used for resources on which -// base::scheduling (e.g. the implementation of a Scheduler) may depend. -// -// NOTE: Cooperative resources may not be nested below non-cooperative ones. -// This means that it is invalid to to acquire a SCHEDULE_COOPERATIVE_AND_KERNEL -// resource if a SCHEDULE_KERNEL_ONLY resource is already held. -enum SchedulingMode { - SCHEDULE_KERNEL_ONLY = 0, // Allow scheduling only the host OS. - SCHEDULE_COOPERATIVE_AND_KERNEL, // Also allow cooperative scheduling. -}; - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_SCHEDULING_MODE_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/scoped_set_env.cc b/third_party/abseil_cpp/absl/base/internal/scoped_set_env.cc deleted file mode 100644 index 8a934cb511..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/scoped_set_env.cc +++ /dev/null @@ -1,81 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/scoped_set_env.h" - -#ifdef _WIN32 -#include <windows.h> -#endif - -#include <cstdlib> - -#include "absl/base/internal/raw_logging.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -namespace { - -#ifdef _WIN32 -const int kMaxEnvVarValueSize = 1024; -#endif - -void SetEnvVar(const char* name, const char* value) { -#ifdef _WIN32 - SetEnvironmentVariableA(name, value); -#else - if (value == nullptr) { - ::unsetenv(name); - } else { - ::setenv(name, value, 1); - } -#endif -} - -} // namespace - -ScopedSetEnv::ScopedSetEnv(const char* var_name, const char* new_value) - : var_name_(var_name), was_unset_(false) { -#ifdef _WIN32 - char buf[kMaxEnvVarValueSize]; - auto get_res = GetEnvironmentVariableA(var_name_.c_str(), buf, sizeof(buf)); - ABSL_INTERNAL_CHECK(get_res < sizeof(buf), "value exceeds buffer size"); - - if (get_res == 0) { - was_unset_ = (GetLastError() == ERROR_ENVVAR_NOT_FOUND); - } else { - old_value_.assign(buf, get_res); - } - - SetEnvironmentVariableA(var_name_.c_str(), new_value); -#else - const char* val = ::getenv(var_name_.c_str()); - if (val == nullptr) { - was_unset_ = true; - } else { - old_value_ = val; - } -#endif - - SetEnvVar(var_name_.c_str(), new_value); -} - -ScopedSetEnv::~ScopedSetEnv() { - SetEnvVar(var_name_.c_str(), was_unset_ ? nullptr : old_value_.c_str()); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/scoped_set_env.h b/third_party/abseil_cpp/absl/base/internal/scoped_set_env.h deleted file mode 100644 index 19ec7b5d8a..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/scoped_set_env.h +++ /dev/null @@ -1,45 +0,0 @@ -// -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -#ifndef ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_ -#define ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_ - -#include <string> - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -class ScopedSetEnv { - public: - ScopedSetEnv(const char* var_name, const char* new_value); - ~ScopedSetEnv(); - - private: - std::string var_name_; - std::string old_value_; - - // True if the environment variable was initially not set. - bool was_unset_; -}; - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/scoped_set_env_test.cc b/third_party/abseil_cpp/absl/base/internal/scoped_set_env_test.cc deleted file mode 100644 index 5cbad246c6..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/scoped_set_env_test.cc +++ /dev/null @@ -1,99 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifdef _WIN32 -#include <windows.h> -#endif - -#include "gtest/gtest.h" -#include "absl/base/internal/scoped_set_env.h" - -namespace { - -using absl::base_internal::ScopedSetEnv; - -std::string GetEnvVar(const char* name) { -#ifdef _WIN32 - char buf[1024]; - auto get_res = GetEnvironmentVariableA(name, buf, sizeof(buf)); - if (get_res >= sizeof(buf)) { - return "TOO_BIG"; - } - - if (get_res == 0) { - return "UNSET"; - } - - return std::string(buf, get_res); -#else - const char* val = ::getenv(name); - if (val == nullptr) { - return "UNSET"; - } - - return val; -#endif -} - -TEST(ScopedSetEnvTest, SetNonExistingVarToString) { - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET"); - - { - ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "value"); - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value"); - } - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET"); -} - -TEST(ScopedSetEnvTest, SetNonExistingVarToNull) { - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET"); - - { - ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", nullptr); - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET"); - } - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET"); -} - -TEST(ScopedSetEnvTest, SetExistingVarToString) { - ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "value"); - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value"); - - { - ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "new_value"); - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "new_value"); - } - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value"); -} - -TEST(ScopedSetEnvTest, SetExistingVarToNull) { - ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "value"); - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value"); - - { - ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", nullptr); - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET"); - } - - EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value"); -} - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock.cc b/third_party/abseil_cpp/absl/base/internal/spinlock.cc deleted file mode 100644 index a7d44f3eb0..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock.cc +++ /dev/null @@ -1,220 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/spinlock.h" - -#include <algorithm> -#include <atomic> -#include <limits> - -#include "absl/base/attributes.h" -#include "absl/base/internal/atomic_hook.h" -#include "absl/base/internal/cycleclock.h" -#include "absl/base/internal/spinlock_wait.h" -#include "absl/base/internal/sysinfo.h" /* For NumCPUs() */ -#include "absl/base/call_once.h" - -// Description of lock-word: -// 31..00: [............................3][2][1][0] -// -// [0]: kSpinLockHeld -// [1]: kSpinLockCooperative -// [2]: kSpinLockDisabledScheduling -// [31..3]: ONLY kSpinLockSleeper OR -// Wait time in cycles >> PROFILE_TIMESTAMP_SHIFT -// -// Detailed descriptions: -// -// Bit [0]: The lock is considered held iff kSpinLockHeld is set. -// -// Bit [1]: Eligible waiters (e.g. Fibers) may co-operatively reschedule when -// contended iff kSpinLockCooperative is set. -// -// Bit [2]: This bit is exclusive from bit [1]. It is used only by a -// non-cooperative lock. When set, indicates that scheduling was -// successfully disabled when the lock was acquired. May be unset, -// even if non-cooperative, if a ThreadIdentity did not yet exist at -// time of acquisition. -// -// Bit [3]: If this is the only upper bit ([31..3]) set then this lock was -// acquired without contention, however, at least one waiter exists. -// -// Otherwise, bits [31..3] represent the time spent by the current lock -// holder to acquire the lock. There may be outstanding waiter(s). - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static base_internal::AtomicHook<void (*)( - const void *lock, int64_t wait_cycles)> - submit_profile_data; - -void RegisterSpinLockProfiler(void (*fn)(const void *contendedlock, - int64_t wait_cycles)) { - submit_profile_data.Store(fn); -} - -// Static member variable definitions. -constexpr uint32_t SpinLock::kSpinLockHeld; -constexpr uint32_t SpinLock::kSpinLockCooperative; -constexpr uint32_t SpinLock::kSpinLockDisabledScheduling; -constexpr uint32_t SpinLock::kSpinLockSleeper; -constexpr uint32_t SpinLock::kWaitTimeMask; - -// Uncommon constructors. -SpinLock::SpinLock(base_internal::SchedulingMode mode) - : lockword_(IsCooperative(mode) ? kSpinLockCooperative : 0) { - ABSL_TSAN_MUTEX_CREATE(this, __tsan_mutex_not_static); -} - -// Monitor the lock to see if its value changes within some time period -// (adaptive_spin_count loop iterations). The last value read from the lock -// is returned from the method. -uint32_t SpinLock::SpinLoop() { - // We are already in the slow path of SpinLock, initialize the - // adaptive_spin_count here. - ABSL_CONST_INIT static absl::once_flag init_adaptive_spin_count; - ABSL_CONST_INIT static int adaptive_spin_count = 0; - base_internal::LowLevelCallOnce(&init_adaptive_spin_count, []() { - adaptive_spin_count = base_internal::NumCPUs() > 1 ? 1000 : 1; - }); - - int c = adaptive_spin_count; - uint32_t lock_value; - do { - lock_value = lockword_.load(std::memory_order_relaxed); - } while ((lock_value & kSpinLockHeld) != 0 && --c > 0); - return lock_value; -} - -void SpinLock::SlowLock() { - uint32_t lock_value = SpinLoop(); - lock_value = TryLockInternal(lock_value, 0); - if ((lock_value & kSpinLockHeld) == 0) { - return; - } - - base_internal::SchedulingMode scheduling_mode; - if ((lock_value & kSpinLockCooperative) != 0) { - scheduling_mode = base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL; - } else { - scheduling_mode = base_internal::SCHEDULE_KERNEL_ONLY; - } - - // The lock was not obtained initially, so this thread needs to wait for - // it. Record the current timestamp in the local variable wait_start_time - // so the total wait time can be stored in the lockword once this thread - // obtains the lock. - int64_t wait_start_time = CycleClock::Now(); - uint32_t wait_cycles = 0; - int lock_wait_call_count = 0; - while ((lock_value & kSpinLockHeld) != 0) { - // If the lock is currently held, but not marked as having a sleeper, mark - // it as having a sleeper. - if ((lock_value & kWaitTimeMask) == 0) { - // Here, just "mark" that the thread is going to sleep. Don't store the - // lock wait time in the lock as that will cause the current lock - // owner to think it experienced contention. - if (lockword_.compare_exchange_strong( - lock_value, lock_value | kSpinLockSleeper, - std::memory_order_relaxed, std::memory_order_relaxed)) { - // Successfully transitioned to kSpinLockSleeper. Pass - // kSpinLockSleeper to the SpinLockWait routine to properly indicate - // the last lock_value observed. - lock_value |= kSpinLockSleeper; - } else if ((lock_value & kSpinLockHeld) == 0) { - // Lock is free again, so try and acquire it before sleeping. The - // new lock state will be the number of cycles this thread waited if - // this thread obtains the lock. - lock_value = TryLockInternal(lock_value, wait_cycles); - continue; // Skip the delay at the end of the loop. - } - } - - // SpinLockDelay() calls into fiber scheduler, we need to see - // synchronization there to avoid false positives. - ABSL_TSAN_MUTEX_PRE_DIVERT(this, 0); - // Wait for an OS specific delay. - base_internal::SpinLockDelay(&lockword_, lock_value, ++lock_wait_call_count, - scheduling_mode); - ABSL_TSAN_MUTEX_POST_DIVERT(this, 0); - // Spin again after returning from the wait routine to give this thread - // some chance of obtaining the lock. - lock_value = SpinLoop(); - wait_cycles = EncodeWaitCycles(wait_start_time, CycleClock::Now()); - lock_value = TryLockInternal(lock_value, wait_cycles); - } -} - -void SpinLock::SlowUnlock(uint32_t lock_value) { - base_internal::SpinLockWake(&lockword_, - false); // wake waiter if necessary - - // If our acquisition was contended, collect contentionz profile info. We - // reserve a unitary wait time to represent that a waiter exists without our - // own acquisition having been contended. - if ((lock_value & kWaitTimeMask) != kSpinLockSleeper) { - const uint64_t wait_cycles = DecodeWaitCycles(lock_value); - ABSL_TSAN_MUTEX_PRE_DIVERT(this, 0); - submit_profile_data(this, wait_cycles); - ABSL_TSAN_MUTEX_POST_DIVERT(this, 0); - } -} - -// We use the upper 29 bits of the lock word to store the time spent waiting to -// acquire this lock. This is reported by contentionz profiling. Since the -// lower bits of the cycle counter wrap very quickly on high-frequency -// processors we divide to reduce the granularity to 2^kProfileTimestampShift -// sized units. On a 4Ghz machine this will lose track of wait times greater -// than (2^29/4 Ghz)*128 =~ 17.2 seconds. Such waits should be extremely rare. -static constexpr int kProfileTimestampShift = 7; - -// We currently reserve the lower 3 bits. -static constexpr int kLockwordReservedShift = 3; - -uint32_t SpinLock::EncodeWaitCycles(int64_t wait_start_time, - int64_t wait_end_time) { - static const int64_t kMaxWaitTime = - std::numeric_limits<uint32_t>::max() >> kLockwordReservedShift; - int64_t scaled_wait_time = - (wait_end_time - wait_start_time) >> kProfileTimestampShift; - - // Return a representation of the time spent waiting that can be stored in - // the lock word's upper bits. - uint32_t clamped = static_cast<uint32_t>( - std::min(scaled_wait_time, kMaxWaitTime) << kLockwordReservedShift); - - if (clamped == 0) { - return kSpinLockSleeper; // Just wake waiters, but don't record contention. - } - // Bump up value if necessary to avoid returning kSpinLockSleeper. - const uint32_t kMinWaitTime = - kSpinLockSleeper + (1 << kLockwordReservedShift); - if (clamped == kSpinLockSleeper) { - return kMinWaitTime; - } - return clamped; -} - -uint64_t SpinLock::DecodeWaitCycles(uint32_t lock_value) { - // Cast to uint32_t first to ensure bits [63:32] are cleared. - const uint64_t scaled_wait_time = - static_cast<uint32_t>(lock_value & kWaitTimeMask); - return scaled_wait_time << (kProfileTimestampShift - kLockwordReservedShift); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock.h b/third_party/abseil_cpp/absl/base/internal/spinlock.h deleted file mode 100644 index 2222398b16..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock.h +++ /dev/null @@ -1,230 +0,0 @@ -// -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -// Most users requiring mutual exclusion should use Mutex. -// SpinLock is provided for use in three situations: -// - for use in code that Mutex itself depends on -// - to get a faster fast-path release under low contention (without an -// atomic read-modify-write) In return, SpinLock has worse behaviour under -// contention, which is why Mutex is preferred in most situations. -// - for async signal safety (see below) - -// SpinLock is async signal safe. If a spinlock is used within a signal -// handler, all code that acquires the lock must ensure that the signal cannot -// arrive while they are holding the lock. Typically, this is done by blocking -// the signal. - -#ifndef ABSL_BASE_INTERNAL_SPINLOCK_H_ -#define ABSL_BASE_INTERNAL_SPINLOCK_H_ - -#include <stdint.h> -#include <sys/types.h> - -#include <atomic> - -#include "absl/base/attributes.h" -#include "absl/base/const_init.h" -#include "absl/base/dynamic_annotations.h" -#include "absl/base/internal/low_level_scheduling.h" -#include "absl/base/internal/raw_logging.h" -#include "absl/base/internal/scheduling_mode.h" -#include "absl/base/internal/tsan_mutex_interface.h" -#include "absl/base/macros.h" -#include "absl/base/port.h" -#include "absl/base/thread_annotations.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -class ABSL_LOCKABLE SpinLock { - public: - SpinLock() : lockword_(kSpinLockCooperative) { - ABSL_TSAN_MUTEX_CREATE(this, __tsan_mutex_not_static); - } - - // Constructors that allow non-cooperative spinlocks to be created for use - // inside thread schedulers. Normal clients should not use these. - explicit SpinLock(base_internal::SchedulingMode mode); - - // Constructor for global SpinLock instances. See absl/base/const_init.h. - constexpr SpinLock(absl::ConstInitType, base_internal::SchedulingMode mode) - : lockword_(IsCooperative(mode) ? kSpinLockCooperative : 0) {} - - ~SpinLock() { ABSL_TSAN_MUTEX_DESTROY(this, __tsan_mutex_not_static); } - - // Acquire this SpinLock. - inline void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION() { - ABSL_TSAN_MUTEX_PRE_LOCK(this, 0); - if (!TryLockImpl()) { - SlowLock(); - } - ABSL_TSAN_MUTEX_POST_LOCK(this, 0, 0); - } - - // Try to acquire this SpinLock without blocking and return true if the - // acquisition was successful. If the lock was not acquired, false is - // returned. If this SpinLock is free at the time of the call, TryLock - // will return true with high probability. - inline bool TryLock() ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(true) { - ABSL_TSAN_MUTEX_PRE_LOCK(this, __tsan_mutex_try_lock); - bool res = TryLockImpl(); - ABSL_TSAN_MUTEX_POST_LOCK( - this, __tsan_mutex_try_lock | (res ? 0 : __tsan_mutex_try_lock_failed), - 0); - return res; - } - - // Release this SpinLock, which must be held by the calling thread. - inline void Unlock() ABSL_UNLOCK_FUNCTION() { - ABSL_TSAN_MUTEX_PRE_UNLOCK(this, 0); - uint32_t lock_value = lockword_.load(std::memory_order_relaxed); - lock_value = lockword_.exchange(lock_value & kSpinLockCooperative, - std::memory_order_release); - - if ((lock_value & kSpinLockDisabledScheduling) != 0) { - base_internal::SchedulingGuard::EnableRescheduling(true); - } - if ((lock_value & kWaitTimeMask) != 0) { - // Collect contentionz profile info, and speed the wakeup of any waiter. - // The wait_cycles value indicates how long this thread spent waiting - // for the lock. - SlowUnlock(lock_value); - } - ABSL_TSAN_MUTEX_POST_UNLOCK(this, 0); - } - - // Determine if the lock is held. When the lock is held by the invoking - // thread, true will always be returned. Intended to be used as - // CHECK(lock.IsHeld()). - inline bool IsHeld() const { - return (lockword_.load(std::memory_order_relaxed) & kSpinLockHeld) != 0; - } - - protected: - // These should not be exported except for testing. - - // Store number of cycles between wait_start_time and wait_end_time in a - // lock value. - static uint32_t EncodeWaitCycles(int64_t wait_start_time, - int64_t wait_end_time); - - // Extract number of wait cycles in a lock value. - static uint64_t DecodeWaitCycles(uint32_t lock_value); - - // Provide access to protected method above. Use for testing only. - friend struct SpinLockTest; - - private: - // lockword_ is used to store the following: - // - // bit[0] encodes whether a lock is being held. - // bit[1] encodes whether a lock uses cooperative scheduling. - // bit[2] encodes whether a lock disables scheduling. - // bit[3:31] encodes time a lock spent on waiting as a 29-bit unsigned int. - static constexpr uint32_t kSpinLockHeld = 1; - static constexpr uint32_t kSpinLockCooperative = 2; - static constexpr uint32_t kSpinLockDisabledScheduling = 4; - static constexpr uint32_t kSpinLockSleeper = 8; - // Includes kSpinLockSleeper. - static constexpr uint32_t kWaitTimeMask = - ~(kSpinLockHeld | kSpinLockCooperative | kSpinLockDisabledScheduling); - - // Returns true if the provided scheduling mode is cooperative. - static constexpr bool IsCooperative( - base_internal::SchedulingMode scheduling_mode) { - return scheduling_mode == base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL; - } - - uint32_t TryLockInternal(uint32_t lock_value, uint32_t wait_cycles); - void SlowLock() ABSL_ATTRIBUTE_COLD; - void SlowUnlock(uint32_t lock_value) ABSL_ATTRIBUTE_COLD; - uint32_t SpinLoop(); - - inline bool TryLockImpl() { - uint32_t lock_value = lockword_.load(std::memory_order_relaxed); - return (TryLockInternal(lock_value, 0) & kSpinLockHeld) == 0; - } - - std::atomic<uint32_t> lockword_; - - SpinLock(const SpinLock&) = delete; - SpinLock& operator=(const SpinLock&) = delete; -}; - -// Corresponding locker object that arranges to acquire a spinlock for -// the duration of a C++ scope. -class ABSL_SCOPED_LOCKABLE SpinLockHolder { - public: - inline explicit SpinLockHolder(SpinLock* l) ABSL_EXCLUSIVE_LOCK_FUNCTION(l) - : lock_(l) { - l->Lock(); - } - inline ~SpinLockHolder() ABSL_UNLOCK_FUNCTION() { lock_->Unlock(); } - - SpinLockHolder(const SpinLockHolder&) = delete; - SpinLockHolder& operator=(const SpinLockHolder&) = delete; - - private: - SpinLock* lock_; -}; - -// Register a hook for profiling support. -// -// The function pointer registered here will be called whenever a spinlock is -// contended. The callback is given an opaque handle to the contended spinlock -// and the number of wait cycles. This is thread-safe, but only a single -// profiler can be registered. It is an error to call this function multiple -// times with different arguments. -void RegisterSpinLockProfiler(void (*fn)(const void* lock, - int64_t wait_cycles)); - -//------------------------------------------------------------------------------ -// Public interface ends here. -//------------------------------------------------------------------------------ - -// If (result & kSpinLockHeld) == 0, then *this was successfully locked. -// Otherwise, returns last observed value for lockword_. -inline uint32_t SpinLock::TryLockInternal(uint32_t lock_value, - uint32_t wait_cycles) { - if ((lock_value & kSpinLockHeld) != 0) { - return lock_value; - } - - uint32_t sched_disabled_bit = 0; - if ((lock_value & kSpinLockCooperative) == 0) { - // For non-cooperative locks we must make sure we mark ourselves as - // non-reschedulable before we attempt to CompareAndSwap. - if (base_internal::SchedulingGuard::DisableRescheduling()) { - sched_disabled_bit = kSpinLockDisabledScheduling; - } - } - - if (!lockword_.compare_exchange_strong( - lock_value, - kSpinLockHeld | lock_value | wait_cycles | sched_disabled_bit, - std::memory_order_acquire, std::memory_order_relaxed)) { - base_internal::SchedulingGuard::EnableRescheduling(sched_disabled_bit != 0); - } - - return lock_value; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_SPINLOCK_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock_akaros.inc b/third_party/abseil_cpp/absl/base/internal/spinlock_akaros.inc deleted file mode 100644 index bc468940fc..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock_akaros.inc +++ /dev/null @@ -1,35 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// This file is an Akaros-specific part of spinlock_wait.cc - -#include <atomic> - -#include "absl/base/internal/scheduling_mode.h" - -extern "C" { - -ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay( - std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */, - int /* loop */, absl::base_internal::SchedulingMode /* mode */) { - // In Akaros, one must take care not to call anything that could cause a - // malloc(), a blocking system call, or a uthread_yield() while holding a - // spinlock. Our callers assume will not call into libraries or other - // arbitrary code. -} - -ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake( - std::atomic<uint32_t>* /* lock_word */, bool /* all */) {} - -} // extern "C" diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock_benchmark.cc b/third_party/abseil_cpp/absl/base/internal/spinlock_benchmark.cc deleted file mode 100644 index 0451c65f95..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock_benchmark.cc +++ /dev/null @@ -1,52 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// See also //absl/synchronization:mutex_benchmark for a comparison of SpinLock -// and Mutex performance under varying levels of contention. - -#include "absl/base/internal/raw_logging.h" -#include "absl/base/internal/scheduling_mode.h" -#include "absl/base/internal/spinlock.h" -#include "absl/synchronization/internal/create_thread_identity.h" -#include "benchmark/benchmark.h" - -namespace { - -template <absl::base_internal::SchedulingMode scheduling_mode> -static void BM_SpinLock(benchmark::State& state) { - // Ensure a ThreadIdentity is installed. - ABSL_INTERNAL_CHECK( - absl::synchronization_internal::GetOrCreateCurrentThreadIdentity() != - nullptr, - "GetOrCreateCurrentThreadIdentity() failed"); - - static auto* spinlock = new absl::base_internal::SpinLock(scheduling_mode); - for (auto _ : state) { - absl::base_internal::SpinLockHolder holder(spinlock); - } -} - -BENCHMARK_TEMPLATE(BM_SpinLock, - absl::base_internal::SCHEDULE_KERNEL_ONLY) - ->UseRealTime() - ->Threads(1) - ->ThreadPerCpu(); - -BENCHMARK_TEMPLATE(BM_SpinLock, - absl::base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL) - ->UseRealTime() - ->Threads(1) - ->ThreadPerCpu(); - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock_linux.inc b/third_party/abseil_cpp/absl/base/internal/spinlock_linux.inc deleted file mode 100644 index e31c6ed477..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock_linux.inc +++ /dev/null @@ -1,74 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// This file is a Linux-specific part of spinlock_wait.cc - -#include <linux/futex.h> -#include <sys/syscall.h> -#include <unistd.h> - -#include <atomic> -#include <climits> -#include <cstdint> -#include <ctime> - -#include "absl/base/attributes.h" -#include "absl/base/internal/errno_saver.h" - -// The SpinLock lockword is `std::atomic<uint32_t>`. Here we assert that -// `std::atomic<uint32_t>` is bitwise equivalent of the `int` expected -// by SYS_futex. We also assume that reads/writes done to the lockword -// by SYS_futex have rational semantics with regard to the -// std::atomic<> API. C++ provides no guarantees of these assumptions, -// but they are believed to hold in practice. -static_assert(sizeof(std::atomic<uint32_t>) == sizeof(int), - "SpinLock lockword has the wrong size for a futex"); - -// Some Android headers are missing these definitions even though they -// support these futex operations. -#ifdef __BIONIC__ -#ifndef SYS_futex -#define SYS_futex __NR_futex -#endif -#ifndef FUTEX_PRIVATE_FLAG -#define FUTEX_PRIVATE_FLAG 128 -#endif -#endif - -#if defined(__NR_futex_time64) && !defined(SYS_futex_time64) -#define SYS_futex_time64 __NR_futex_time64 -#endif - -#if defined(SYS_futex_time64) && !defined(SYS_futex) -#define SYS_futex SYS_futex_time64 -#endif - -extern "C" { - -ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay( - std::atomic<uint32_t> *w, uint32_t value, int loop, - absl::base_internal::SchedulingMode) { - absl::base_internal::ErrnoSaver errno_saver; - struct timespec tm; - tm.tv_sec = 0; - tm.tv_nsec = absl::base_internal::SpinLockSuggestedDelayNS(loop); - syscall(SYS_futex, w, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, value, &tm); -} - -ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake(std::atomic<uint32_t> *w, - bool all) { - syscall(SYS_futex, w, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, all ? INT_MAX : 1, 0); -} - -} // extern "C" diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock_posix.inc b/third_party/abseil_cpp/absl/base/internal/spinlock_posix.inc deleted file mode 100644 index fcd21b151b..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock_posix.inc +++ /dev/null @@ -1,46 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// This file is a Posix-specific part of spinlock_wait.cc - -#include <sched.h> - -#include <atomic> -#include <ctime> - -#include "absl/base/internal/errno_saver.h" -#include "absl/base/internal/scheduling_mode.h" -#include "absl/base/port.h" - -extern "C" { - -ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay( - std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */, int loop, - absl::base_internal::SchedulingMode /* mode */) { - absl::base_internal::ErrnoSaver errno_saver; - if (loop == 0) { - } else if (loop == 1) { - sched_yield(); - } else { - struct timespec tm; - tm.tv_sec = 0; - tm.tv_nsec = absl::base_internal::SpinLockSuggestedDelayNS(loop); - nanosleep(&tm, nullptr); - } -} - -ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake( - std::atomic<uint32_t>* /* lock_word */, bool /* all */) {} - -} // extern "C" diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock_wait.cc b/third_party/abseil_cpp/absl/base/internal/spinlock_wait.cc deleted file mode 100644 index fa824be1c0..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock_wait.cc +++ /dev/null @@ -1,81 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// The OS-specific header included below must provide two calls: -// AbslInternalSpinLockDelay() and AbslInternalSpinLockWake(). -// See spinlock_wait.h for the specs. - -#include <atomic> -#include <cstdint> - -#include "absl/base/internal/spinlock_wait.h" - -#if defined(_WIN32) -#include "absl/base/internal/spinlock_win32.inc" -#elif defined(__linux__) -#include "absl/base/internal/spinlock_linux.inc" -#elif defined(__akaros__) -#include "absl/base/internal/spinlock_akaros.inc" -#else -#include "absl/base/internal/spinlock_posix.inc" -#endif - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// See spinlock_wait.h for spec. -uint32_t SpinLockWait(std::atomic<uint32_t> *w, int n, - const SpinLockWaitTransition trans[], - base_internal::SchedulingMode scheduling_mode) { - int loop = 0; - for (;;) { - uint32_t v = w->load(std::memory_order_acquire); - int i; - for (i = 0; i != n && v != trans[i].from; i++) { - } - if (i == n) { - SpinLockDelay(w, v, ++loop, scheduling_mode); // no matching transition - } else if (trans[i].to == v || // null transition - w->compare_exchange_strong(v, trans[i].to, - std::memory_order_acquire, - std::memory_order_relaxed)) { - if (trans[i].done) return v; - } - } -} - -static std::atomic<uint64_t> delay_rand; - -// Return a suggested delay in nanoseconds for iteration number "loop" -int SpinLockSuggestedDelayNS(int loop) { - // Weak pseudo-random number generator to get some spread between threads - // when many are spinning. - uint64_t r = delay_rand.load(std::memory_order_relaxed); - r = 0x5deece66dLL * r + 0xb; // numbers from nrand48() - delay_rand.store(r, std::memory_order_relaxed); - - if (loop < 0 || loop > 32) { // limit loop to 0..32 - loop = 32; - } - const int kMinDelay = 128 << 10; // 128us - // Double delay every 8 iterations, up to 16x (2ms). - int delay = kMinDelay << (loop / 8); - // Randomize in delay..2*delay range, for resulting 128us..4ms range. - return delay | ((delay - 1) & static_cast<int>(r)); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock_wait.h b/third_party/abseil_cpp/absl/base/internal/spinlock_wait.h deleted file mode 100644 index 169bc749fb..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock_wait.h +++ /dev/null @@ -1,93 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_SPINLOCK_WAIT_H_ -#define ABSL_BASE_INTERNAL_SPINLOCK_WAIT_H_ - -// Operations to make atomic transitions on a word, and to allow -// waiting for those transitions to become possible. - -#include <stdint.h> -#include <atomic> - -#include "absl/base/internal/scheduling_mode.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// SpinLockWait() waits until it can perform one of several transitions from -// "from" to "to". It returns when it performs a transition where done==true. -struct SpinLockWaitTransition { - uint32_t from; - uint32_t to; - bool done; -}; - -// Wait until *w can transition from trans[i].from to trans[i].to for some i -// satisfying 0<=i<n && trans[i].done, atomically make the transition, -// then return the old value of *w. Make any other atomic transitions -// where !trans[i].done, but continue waiting. -uint32_t SpinLockWait(std::atomic<uint32_t> *w, int n, - const SpinLockWaitTransition trans[], - SchedulingMode scheduling_mode); - -// If possible, wake some thread that has called SpinLockDelay(w, ...). If -// "all" is true, wake all such threads. This call is a hint, and on some -// systems it may be a no-op; threads calling SpinLockDelay() will always wake -// eventually even if SpinLockWake() is never called. -void SpinLockWake(std::atomic<uint32_t> *w, bool all); - -// Wait for an appropriate spin delay on iteration "loop" of a -// spin loop on location *w, whose previously observed value was "value". -// SpinLockDelay() may do nothing, may yield the CPU, may sleep a clock tick, -// or may wait for a delay that can be truncated by a call to SpinLockWake(w). -// In all cases, it must return in bounded time even if SpinLockWake() is not -// called. -void SpinLockDelay(std::atomic<uint32_t> *w, uint32_t value, int loop, - base_internal::SchedulingMode scheduling_mode); - -// Helper used by AbslInternalSpinLockDelay. -// Returns a suggested delay in nanoseconds for iteration number "loop". -int SpinLockSuggestedDelayNS(int loop); - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -// In some build configurations we pass --detect-odr-violations to the -// gold linker. This causes it to flag weak symbol overrides as ODR -// violations. Because ODR only applies to C++ and not C, -// --detect-odr-violations ignores symbols not mangled with C++ names. -// By changing our extension points to be extern "C", we dodge this -// check. -extern "C" { -void AbslInternalSpinLockWake(std::atomic<uint32_t> *w, bool all); -void AbslInternalSpinLockDelay( - std::atomic<uint32_t> *w, uint32_t value, int loop, - absl::base_internal::SchedulingMode scheduling_mode); -} - -inline void absl::base_internal::SpinLockWake(std::atomic<uint32_t> *w, - bool all) { - AbslInternalSpinLockWake(w, all); -} - -inline void absl::base_internal::SpinLockDelay( - std::atomic<uint32_t> *w, uint32_t value, int loop, - absl::base_internal::SchedulingMode scheduling_mode) { - AbslInternalSpinLockDelay(w, value, loop, scheduling_mode); -} - -#endif // ABSL_BASE_INTERNAL_SPINLOCK_WAIT_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/spinlock_win32.inc b/third_party/abseil_cpp/absl/base/internal/spinlock_win32.inc deleted file mode 100644 index 78654b5b59..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/spinlock_win32.inc +++ /dev/null @@ -1,37 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// This file is a Win32-specific part of spinlock_wait.cc - -#include <windows.h> -#include <atomic> -#include "absl/base/internal/scheduling_mode.h" - -extern "C" { - -void AbslInternalSpinLockDelay(std::atomic<uint32_t>* /* lock_word */, - uint32_t /* value */, int loop, - absl::base_internal::SchedulingMode /* mode */) { - if (loop == 0) { - } else if (loop == 1) { - Sleep(0); - } else { - Sleep(absl::base_internal::SpinLockSuggestedDelayNS(loop) / 1000000); - } -} - -void AbslInternalSpinLockWake(std::atomic<uint32_t>* /* lock_word */, - bool /* all */) {} - -} // extern "C" diff --git a/third_party/abseil_cpp/absl/base/internal/strerror.cc b/third_party/abseil_cpp/absl/base/internal/strerror.cc deleted file mode 100644 index af181513cd..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/strerror.cc +++ /dev/null @@ -1,75 +0,0 @@ -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/strerror.h" - -#include <cerrno> -#include <cstddef> -#include <cstdio> -#include <cstring> -#include <string> -#include <type_traits> - -#include "absl/base/attributes.h" -#include "absl/base/internal/errno_saver.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { -namespace { -const char* StrErrorAdaptor(int errnum, char* buf, size_t buflen) { -#if defined(_WIN32) - int rc = strerror_s(buf, buflen, errnum); - buf[buflen - 1] = '\0'; // guarantee NUL termination - if (rc == 0 && strncmp(buf, "Unknown error", buflen) == 0) *buf = '\0'; - return buf; -#else -#if defined(__GLIBC__) || defined(__APPLE__) - // Use the BSD sys_errlist API provided by GNU glibc and others to - // avoid any need to copy the message into the local buffer first. - if (0 <= errnum && errnum < sys_nerr) { - if (const char* p = sys_errlist[errnum]) { - return p; - } - } -#endif - // The type of `ret` is platform-specific; both of these branches must compile - // either way but only one will execute on any given platform: - auto ret = strerror_r(errnum, buf, buflen); - if (std::is_same<decltype(ret), int>::value) { - // XSI `strerror_r`; `ret` is `int`: - if (ret) *buf = '\0'; - return buf; - } else { - // GNU `strerror_r`; `ret` is `char *`: - return reinterpret_cast<const char*>(ret); - } -#endif -} -} // namespace - -std::string StrError(int errnum) { - absl::base_internal::ErrnoSaver errno_saver; - char buf[100]; - const char* str = StrErrorAdaptor(errnum, buf, sizeof buf); - if (*str == '\0') { - snprintf(buf, sizeof buf, "Unknown error %d", errnum); - str = buf; - } - return str; -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/strerror.h b/third_party/abseil_cpp/absl/base/internal/strerror.h deleted file mode 100644 index 350097366e..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/strerror.h +++ /dev/null @@ -1,39 +0,0 @@ -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef ABSL_BASE_INTERNAL_STRERROR_H_ -#define ABSL_BASE_INTERNAL_STRERROR_H_ - -#include <string> - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// A portable and thread-safe alternative to C89's `strerror`. -// -// The C89 specification of `strerror` is not suitable for use in a -// multi-threaded application as the returned string may be changed by calls to -// `strerror` from another thread. The many non-stdlib alternatives differ -// enough in their names, availability, and semantics to justify this wrapper -// around them. `errno` will not be modified by a call to `absl::StrError`. -std::string StrError(int errnum); - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_STRERROR_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/strerror_benchmark.cc b/third_party/abseil_cpp/absl/base/internal/strerror_benchmark.cc deleted file mode 100644 index d8ca86b95b..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/strerror_benchmark.cc +++ /dev/null @@ -1,38 +0,0 @@ -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include <cerrno> -#include <cstdio> -#include <string> - -#include "absl/base/internal/strerror.h" -#include "benchmark/benchmark.h" - -namespace { -#if defined(__GLIBC__) || defined(__APPLE__) -void BM_SysErrList(benchmark::State& state) { - for (auto _ : state) { - benchmark::DoNotOptimize(std::string(sys_errlist[ERANGE])); - } -} -BENCHMARK(BM_SysErrList); -#endif - -void BM_AbslStrError(benchmark::State& state) { - for (auto _ : state) { - benchmark::DoNotOptimize(absl::base_internal::StrError(ERANGE)); - } -} -BENCHMARK(BM_AbslStrError); -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/strerror_test.cc b/third_party/abseil_cpp/absl/base/internal/strerror_test.cc deleted file mode 100644 index a53da97f92..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/strerror_test.cc +++ /dev/null @@ -1,86 +0,0 @@ -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/strerror.h" - -#include <atomic> -#include <cerrno> -#include <cstdio> -#include <cstring> -#include <string> -#include <thread> // NOLINT(build/c++11) -#include <vector> - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/strings/match.h" - -namespace { -using ::testing::AnyOf; -using ::testing::Eq; - -TEST(StrErrorTest, ValidErrorCode) { - errno = ERANGE; - EXPECT_THAT(absl::base_internal::StrError(EDOM), Eq(strerror(EDOM))); - EXPECT_THAT(errno, Eq(ERANGE)); -} - -TEST(StrErrorTest, InvalidErrorCode) { - errno = ERANGE; - EXPECT_THAT(absl::base_internal::StrError(-1), - AnyOf(Eq("No error information"), Eq("Unknown error -1"))); - EXPECT_THAT(errno, Eq(ERANGE)); -} - -TEST(StrErrorTest, MultipleThreads) { - // In this test, we will start up 2 threads and have each one call - // StrError 1000 times, each time with a different errnum. We - // expect that StrError(errnum) will return a string equal to the - // one returned by strerror(errnum), if the code is known. Since - // strerror is known to be thread-hostile, collect all the expected - // strings up front. - const int kNumCodes = 1000; - std::vector<std::string> expected_strings(kNumCodes); - for (int i = 0; i < kNumCodes; ++i) { - expected_strings[i] = strerror(i); - } - - std::atomic_int counter(0); - auto thread_fun = [&]() { - for (int i = 0; i < kNumCodes; ++i) { - ++counter; - errno = ERANGE; - const std::string value = absl::base_internal::StrError(i); - // Only the GNU implementation is guaranteed to provide the - // string "Unknown error nnn". POSIX doesn't say anything. - if (!absl::StartsWith(value, "Unknown error ")) { - EXPECT_THAT(absl::base_internal::StrError(i), Eq(expected_strings[i])); - } - EXPECT_THAT(errno, Eq(ERANGE)); - } - }; - - const int kNumThreads = 100; - std::vector<std::thread> threads; - for (int i = 0; i < kNumThreads; ++i) { - threads.push_back(std::thread(thread_fun)); - } - for (auto& thread : threads) { - thread.join(); - } - - EXPECT_THAT(counter, Eq(kNumThreads * kNumCodes)); -} - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/sysinfo.cc b/third_party/abseil_cpp/absl/base/internal/sysinfo.cc deleted file mode 100644 index 6c69683faf..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/sysinfo.cc +++ /dev/null @@ -1,425 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/sysinfo.h" - -#include "absl/base/attributes.h" - -#ifdef _WIN32 -#include <windows.h> -#else -#include <fcntl.h> -#include <pthread.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> -#endif - -#ifdef __linux__ -#include <sys/syscall.h> -#endif - -#if defined(__APPLE__) || defined(__FreeBSD__) -#include <sys/sysctl.h> -#endif - -#if defined(__myriad2__) -#include <rtems.h> -#endif - -#include <string.h> -#include <cassert> -#include <cstdint> -#include <cstdio> -#include <cstdlib> -#include <ctime> -#include <limits> -#include <thread> // NOLINT(build/c++11) -#include <utility> -#include <vector> - -#include "absl/base/call_once.h" -#include "absl/base/internal/raw_logging.h" -#include "absl/base/internal/spinlock.h" -#include "absl/base/internal/unscaledcycleclock.h" -#include "absl/base/thread_annotations.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -static int GetNumCPUs() { -#if defined(__myriad2__) - return 1; -#else - // Other possibilities: - // - Read /sys/devices/system/cpu/online and use cpumask_parse() - // - sysconf(_SC_NPROCESSORS_ONLN) - return std::thread::hardware_concurrency(); -#endif -} - -#if defined(_WIN32) - -static double GetNominalCPUFrequency() { -#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && \ - !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) - // UWP apps don't have access to the registry and currently don't provide an - // API informing about CPU nominal frequency. - return 1.0; -#else -#pragma comment(lib, "advapi32.lib") // For Reg* functions. - HKEY key; - // Use the Reg* functions rather than the SH functions because shlwapi.dll - // pulls in gdi32.dll which makes process destruction much more costly. - if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, - "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0", 0, - KEY_READ, &key) == ERROR_SUCCESS) { - DWORD type = 0; - DWORD data = 0; - DWORD data_size = sizeof(data); - auto result = RegQueryValueExA(key, "~MHz", 0, &type, - reinterpret_cast<LPBYTE>(&data), &data_size); - RegCloseKey(key); - if (result == ERROR_SUCCESS && type == REG_DWORD && - data_size == sizeof(data)) { - return data * 1e6; // Value is MHz. - } - } - return 1.0; -#endif // WINAPI_PARTITION_APP && !WINAPI_PARTITION_DESKTOP -} - -#elif defined(CTL_HW) && defined(HW_CPU_FREQ) - -static double GetNominalCPUFrequency() { - unsigned freq; - size_t size = sizeof(freq); - int mib[2] = {CTL_HW, HW_CPU_FREQ}; - if (sysctl(mib, 2, &freq, &size, nullptr, 0) == 0) { - return static_cast<double>(freq); - } - return 1.0; -} - -#else - -// Helper function for reading a long from a file. Returns true if successful -// and the memory location pointed to by value is set to the value read. -static bool ReadLongFromFile(const char *file, long *value) { - bool ret = false; - int fd = open(file, O_RDONLY); - if (fd != -1) { - char line[1024]; - char *err; - memset(line, '\0', sizeof(line)); - int len = read(fd, line, sizeof(line) - 1); - if (len <= 0) { - ret = false; - } else { - const long temp_value = strtol(line, &err, 10); - if (line[0] != '\0' && (*err == '\n' || *err == '\0')) { - *value = temp_value; - ret = true; - } - } - close(fd); - } - return ret; -} - -#if defined(ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY) - -// Reads a monotonic time source and returns a value in -// nanoseconds. The returned value uses an arbitrary epoch, not the -// Unix epoch. -static int64_t ReadMonotonicClockNanos() { - struct timespec t; -#ifdef CLOCK_MONOTONIC_RAW - int rc = clock_gettime(CLOCK_MONOTONIC_RAW, &t); -#else - int rc = clock_gettime(CLOCK_MONOTONIC, &t); -#endif - if (rc != 0) { - perror("clock_gettime() failed"); - abort(); - } - return int64_t{t.tv_sec} * 1000000000 + t.tv_nsec; -} - -class UnscaledCycleClockWrapperForInitializeFrequency { - public: - static int64_t Now() { return base_internal::UnscaledCycleClock::Now(); } -}; - -struct TimeTscPair { - int64_t time; // From ReadMonotonicClockNanos(). - int64_t tsc; // From UnscaledCycleClock::Now(). -}; - -// Returns a pair of values (monotonic kernel time, TSC ticks) that -// approximately correspond to each other. This is accomplished by -// doing several reads and picking the reading with the lowest -// latency. This approach is used to minimize the probability that -// our thread was preempted between clock reads. -static TimeTscPair GetTimeTscPair() { - int64_t best_latency = std::numeric_limits<int64_t>::max(); - TimeTscPair best; - for (int i = 0; i < 10; ++i) { - int64_t t0 = ReadMonotonicClockNanos(); - int64_t tsc = UnscaledCycleClockWrapperForInitializeFrequency::Now(); - int64_t t1 = ReadMonotonicClockNanos(); - int64_t latency = t1 - t0; - if (latency < best_latency) { - best_latency = latency; - best.time = t0; - best.tsc = tsc; - } - } - return best; -} - -// Measures and returns the TSC frequency by taking a pair of -// measurements approximately `sleep_nanoseconds` apart. -static double MeasureTscFrequencyWithSleep(int sleep_nanoseconds) { - auto t0 = GetTimeTscPair(); - struct timespec ts; - ts.tv_sec = 0; - ts.tv_nsec = sleep_nanoseconds; - while (nanosleep(&ts, &ts) != 0 && errno == EINTR) {} - auto t1 = GetTimeTscPair(); - double elapsed_ticks = t1.tsc - t0.tsc; - double elapsed_time = (t1.time - t0.time) * 1e-9; - return elapsed_ticks / elapsed_time; -} - -// Measures and returns the TSC frequency by calling -// MeasureTscFrequencyWithSleep(), doubling the sleep interval until the -// frequency measurement stabilizes. -static double MeasureTscFrequency() { - double last_measurement = -1.0; - int sleep_nanoseconds = 1000000; // 1 millisecond. - for (int i = 0; i < 8; ++i) { - double measurement = MeasureTscFrequencyWithSleep(sleep_nanoseconds); - if (measurement * 0.99 < last_measurement && - last_measurement < measurement * 1.01) { - // Use the current measurement if it is within 1% of the - // previous measurement. - return measurement; - } - last_measurement = measurement; - sleep_nanoseconds *= 2; - } - return last_measurement; -} - -#endif // ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY - -static double GetNominalCPUFrequency() { - long freq = 0; - - // Google's production kernel has a patch to export the TSC - // frequency through sysfs. If the kernel is exporting the TSC - // frequency use that. There are issues where cpuinfo_max_freq - // cannot be relied on because the BIOS may be exporting an invalid - // p-state (on x86) or p-states may be used to put the processor in - // a new mode (turbo mode). Essentially, those frequencies cannot - // always be relied upon. The same reasons apply to /proc/cpuinfo as - // well. - if (ReadLongFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)) { - return freq * 1e3; // Value is kHz. - } - -#if defined(ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY) - // On these platforms, the TSC frequency is the nominal CPU - // frequency. But without having the kernel export it directly - // though /sys/devices/system/cpu/cpu0/tsc_freq_khz, there is no - // other way to reliably get the TSC frequency, so we have to - // measure it ourselves. Some CPUs abuse cpuinfo_max_freq by - // exporting "fake" frequencies for implementing new features. For - // example, Intel's turbo mode is enabled by exposing a p-state - // value with a higher frequency than that of the real TSC - // rate. Because of this, we prefer to measure the TSC rate - // ourselves on i386 and x86-64. - return MeasureTscFrequency(); -#else - - // If CPU scaling is in effect, we want to use the *maximum* - // frequency, not whatever CPU speed some random processor happens - // to be using now. - if (ReadLongFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq", - &freq)) { - return freq * 1e3; // Value is kHz. - } - - return 1.0; -#endif // !ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY -} - -#endif - -ABSL_CONST_INIT static once_flag init_num_cpus_once; -ABSL_CONST_INIT static int num_cpus = 0; - -// NumCPUs() may be called before main() and before malloc is properly -// initialized, therefore this must not allocate memory. -int NumCPUs() { - base_internal::LowLevelCallOnce( - &init_num_cpus_once, []() { num_cpus = GetNumCPUs(); }); - return num_cpus; -} - -// A default frequency of 0.0 might be dangerous if it is used in division. -ABSL_CONST_INIT static once_flag init_nominal_cpu_frequency_once; -ABSL_CONST_INIT static double nominal_cpu_frequency = 1.0; - -// NominalCPUFrequency() may be called before main() and before malloc is -// properly initialized, therefore this must not allocate memory. -double NominalCPUFrequency() { - base_internal::LowLevelCallOnce( - &init_nominal_cpu_frequency_once, - []() { nominal_cpu_frequency = GetNominalCPUFrequency(); }); - return nominal_cpu_frequency; -} - -#if defined(_WIN32) - -pid_t GetTID() { - return pid_t{GetCurrentThreadId()}; -} - -#elif defined(__linux__) - -#ifndef SYS_gettid -#define SYS_gettid __NR_gettid -#endif - -pid_t GetTID() { - return syscall(SYS_gettid); -} - -#elif defined(__akaros__) - -pid_t GetTID() { - // Akaros has a concept of "vcore context", which is the state the program - // is forced into when we need to make a user-level scheduling decision, or - // run a signal handler. This is analogous to the interrupt context that a - // CPU might enter if it encounters some kind of exception. - // - // There is no current thread context in vcore context, but we need to give - // a reasonable answer if asked for a thread ID (e.g., in a signal handler). - // Thread 0 always exists, so if we are in vcore context, we return that. - // - // Otherwise, we know (since we are using pthreads) that the uthread struct - // current_uthread is pointing to is the first element of a - // struct pthread_tcb, so we extract and return the thread ID from that. - // - // TODO(dcross): Akaros anticipates moving the thread ID to the uthread - // structure at some point. We should modify this code to remove the cast - // when that happens. - if (in_vcore_context()) - return 0; - return reinterpret_cast<struct pthread_tcb *>(current_uthread)->id; -} - -#elif defined(__myriad2__) - -pid_t GetTID() { - uint32_t tid; - rtems_task_ident(RTEMS_SELF, 0, &tid); - return tid; -} - -#else - -// Fallback implementation of GetTID using pthread_getspecific. -ABSL_CONST_INIT static once_flag tid_once; -ABSL_CONST_INIT static pthread_key_t tid_key; -ABSL_CONST_INIT static absl::base_internal::SpinLock tid_lock( - absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); - -// We set a bit per thread in this array to indicate that an ID is in -// use. ID 0 is unused because it is the default value returned by -// pthread_getspecific(). -ABSL_CONST_INIT static std::vector<uint32_t> *tid_array - ABSL_GUARDED_BY(tid_lock) = nullptr; -static constexpr int kBitsPerWord = 32; // tid_array is uint32_t. - -// Returns the TID to tid_array. -static void FreeTID(void *v) { - intptr_t tid = reinterpret_cast<intptr_t>(v); - int word = tid / kBitsPerWord; - uint32_t mask = ~(1u << (tid % kBitsPerWord)); - absl::base_internal::SpinLockHolder lock(&tid_lock); - assert(0 <= word && static_cast<size_t>(word) < tid_array->size()); - (*tid_array)[word] &= mask; -} - -static void InitGetTID() { - if (pthread_key_create(&tid_key, FreeTID) != 0) { - // The logging system calls GetTID() so it can't be used here. - perror("pthread_key_create failed"); - abort(); - } - - // Initialize tid_array. - absl::base_internal::SpinLockHolder lock(&tid_lock); - tid_array = new std::vector<uint32_t>(1); - (*tid_array)[0] = 1; // ID 0 is never-allocated. -} - -// Return a per-thread small integer ID from pthread's thread-specific data. -pid_t GetTID() { - absl::call_once(tid_once, InitGetTID); - - intptr_t tid = reinterpret_cast<intptr_t>(pthread_getspecific(tid_key)); - if (tid != 0) { - return tid; - } - - int bit; // tid_array[word] = 1u << bit; - size_t word; - { - // Search for the first unused ID. - absl::base_internal::SpinLockHolder lock(&tid_lock); - // First search for a word in the array that is not all ones. - word = 0; - while (word < tid_array->size() && ~(*tid_array)[word] == 0) { - ++word; - } - if (word == tid_array->size()) { - tid_array->push_back(0); // No space left, add kBitsPerWord more IDs. - } - // Search for a zero bit in the word. - bit = 0; - while (bit < kBitsPerWord && (((*tid_array)[word] >> bit) & 1) != 0) { - ++bit; - } - tid = (word * kBitsPerWord) + bit; - (*tid_array)[word] |= 1u << bit; // Mark the TID as allocated. - } - - if (pthread_setspecific(tid_key, reinterpret_cast<void *>(tid)) != 0) { - perror("pthread_setspecific failed"); - abort(); - } - - return static_cast<pid_t>(tid); -} - -#endif - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/sysinfo.h b/third_party/abseil_cpp/absl/base/internal/sysinfo.h deleted file mode 100644 index 7246d5dd95..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/sysinfo.h +++ /dev/null @@ -1,66 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// This file includes routines to find out characteristics -// of the machine a program is running on. It is undoubtedly -// system-dependent. - -// Functions listed here that accept a pid_t as an argument act on the -// current process if the pid_t argument is 0 -// All functions here are thread-hostile due to file caching unless -// commented otherwise. - -#ifndef ABSL_BASE_INTERNAL_SYSINFO_H_ -#define ABSL_BASE_INTERNAL_SYSINFO_H_ - -#ifndef _WIN32 -#include <sys/types.h> -#endif - -#include <cstdint> - -#include "absl/base/port.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// Nominal core processor cycles per second of each processor. This is _not_ -// necessarily the frequency of the CycleClock counter (see cycleclock.h) -// Thread-safe. -double NominalCPUFrequency(); - -// Number of logical processors (hyperthreads) in system. Thread-safe. -int NumCPUs(); - -// Return the thread id of the current thread, as told by the system. -// No two currently-live threads implemented by the OS shall have the same ID. -// Thread ids of exited threads may be reused. Multiple user-level threads -// may have the same thread ID if multiplexed on the same OS thread. -// -// On Linux, you may send a signal to the resulting ID with kill(). However, -// it is recommended for portability that you use pthread_kill() instead. -#ifdef _WIN32 -// On Windows, process id and thread id are of the same type according to the -// return types of GetProcessId() and GetThreadId() are both DWORD, an unsigned -// 32-bit type. -using pid_t = uint32_t; -#endif -pid_t GetTID(); - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_SYSINFO_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/sysinfo_test.cc b/third_party/abseil_cpp/absl/base/internal/sysinfo_test.cc deleted file mode 100644 index fa8b88b1dc..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/sysinfo_test.cc +++ /dev/null @@ -1,100 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/sysinfo.h" - -#ifndef _WIN32 -#include <sys/types.h> -#include <unistd.h> -#endif - -#include <thread> // NOLINT(build/c++11) -#include <unordered_set> -#include <vector> - -#include "gtest/gtest.h" -#include "absl/synchronization/barrier.h" -#include "absl/synchronization/mutex.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { -namespace { - -TEST(SysinfoTest, NumCPUs) { - EXPECT_NE(NumCPUs(), 0) - << "NumCPUs() should not have the default value of 0"; -} - -TEST(SysinfoTest, NominalCPUFrequency) { -#if !(defined(__aarch64__) && defined(__linux__)) && !defined(__EMSCRIPTEN__) - EXPECT_GE(NominalCPUFrequency(), 1000.0) - << "NominalCPUFrequency() did not return a reasonable value"; -#else - // Aarch64 cannot read the CPU frequency from sysfs, so we get back 1.0. - // Emscripten does not have a sysfs to read from at all. - EXPECT_EQ(NominalCPUFrequency(), 1.0) - << "CPU frequency detection was fixed! Please update unittest."; -#endif -} - -TEST(SysinfoTest, GetTID) { - EXPECT_EQ(GetTID(), GetTID()); // Basic compile and equality test. -#ifdef __native_client__ - // Native Client has a race condition bug that leads to memory - // exaustion when repeatedly creating and joining threads. - // https://bugs.chromium.org/p/nativeclient/issues/detail?id=1027 - return; -#endif - // Test that TIDs are unique to each thread. - // Uses a few loops to exercise implementations that reallocate IDs. - for (int i = 0; i < 10; ++i) { - constexpr int kNumThreads = 10; - Barrier all_threads_done(kNumThreads); - std::vector<std::thread> threads; - - Mutex mutex; - std::unordered_set<pid_t> tids; - - for (int j = 0; j < kNumThreads; ++j) { - threads.push_back(std::thread([&]() { - pid_t id = GetTID(); - { - MutexLock lock(&mutex); - ASSERT_TRUE(tids.find(id) == tids.end()); - tids.insert(id); - } - // We can't simply join the threads here. The threads need to - // be alive otherwise the TID might have been reallocated to - // another live thread. - all_threads_done.Block(); - })); - } - for (auto& thread : threads) { - thread.join(); - } - } -} - -#ifdef __linux__ -TEST(SysinfoTest, LinuxGetTID) { - // On Linux, for the main thread, GetTID()==getpid() is guaranteed by the API. - EXPECT_EQ(GetTID(), getpid()); -} -#endif - -} // namespace -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/thread_annotations.h b/third_party/abseil_cpp/absl/base/internal/thread_annotations.h deleted file mode 100644 index 4dab6a9c15..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/thread_annotations.h +++ /dev/null @@ -1,271 +0,0 @@ -// Copyright 2019 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// ----------------------------------------------------------------------------- -// File: thread_annotations.h -// ----------------------------------------------------------------------------- -// -// WARNING: This is a backwards compatible header and it will be removed after -// the migration to prefixed thread annotations is finished; please include -// "absl/base/thread_annotations.h". -// -// This header file contains macro definitions for thread safety annotations -// that allow developers to document the locking policies of multi-threaded -// code. The annotations can also help program analysis tools to identify -// potential thread safety issues. -// -// These annotations are implemented using compiler attributes. Using the macros -// defined here instead of raw attributes allow for portability and future -// compatibility. -// -// When referring to mutexes in the arguments of the attributes, you should -// use variable names or more complex expressions (e.g. my_object->mutex_) -// that evaluate to a concrete mutex object whenever possible. If the mutex -// you want to refer to is not in scope, you may use a member pointer -// (e.g. &MyClass::mutex_) to refer to a mutex in some (unknown) object. - -#ifndef ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_ -#define ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_ - -#if defined(__clang__) -#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x)) -#else -#define THREAD_ANNOTATION_ATTRIBUTE__(x) // no-op -#endif - -// GUARDED_BY() -// -// Documents if a shared field or global variable needs to be protected by a -// mutex. GUARDED_BY() allows the user to specify a particular mutex that -// should be held when accessing the annotated variable. -// -// Although this annotation (and PT_GUARDED_BY, below) cannot be applied to -// local variables, a local variable and its associated mutex can often be -// combined into a small class or struct, thereby allowing the annotation. -// -// Example: -// -// class Foo { -// Mutex mu_; -// int p1_ GUARDED_BY(mu_); -// ... -// }; -#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x)) - -// PT_GUARDED_BY() -// -// Documents if the memory location pointed to by a pointer should be guarded -// by a mutex when dereferencing the pointer. -// -// Example: -// class Foo { -// Mutex mu_; -// int *p1_ PT_GUARDED_BY(mu_); -// ... -// }; -// -// Note that a pointer variable to a shared memory location could itself be a -// shared variable. -// -// Example: -// -// // `q_`, guarded by `mu1_`, points to a shared memory location that is -// // guarded by `mu2_`: -// int *q_ GUARDED_BY(mu1_) PT_GUARDED_BY(mu2_); -#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x)) - -// ACQUIRED_AFTER() / ACQUIRED_BEFORE() -// -// Documents the acquisition order between locks that can be held -// simultaneously by a thread. For any two locks that need to be annotated -// to establish an acquisition order, only one of them needs the annotation. -// (i.e. You don't have to annotate both locks with both ACQUIRED_AFTER -// and ACQUIRED_BEFORE.) -// -// As with GUARDED_BY, this is only applicable to mutexes that are shared -// fields or global variables. -// -// Example: -// -// Mutex m1_; -// Mutex m2_ ACQUIRED_AFTER(m1_); -#define ACQUIRED_AFTER(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__)) - -#define ACQUIRED_BEFORE(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__)) - -// EXCLUSIVE_LOCKS_REQUIRED() / SHARED_LOCKS_REQUIRED() -// -// Documents a function that expects a mutex to be held prior to entry. -// The mutex is expected to be held both on entry to, and exit from, the -// function. -// -// An exclusive lock allows read-write access to the guarded data member(s), and -// only one thread can acquire a lock exclusively at any one time. A shared lock -// allows read-only access, and any number of threads can acquire a shared lock -// concurrently. -// -// Generally, non-const methods should be annotated with -// EXCLUSIVE_LOCKS_REQUIRED, while const methods should be annotated with -// SHARED_LOCKS_REQUIRED. -// -// Example: -// -// Mutex mu1, mu2; -// int a GUARDED_BY(mu1); -// int b GUARDED_BY(mu2); -// -// void foo() EXCLUSIVE_LOCKS_REQUIRED(mu1, mu2) { ... } -// void bar() const SHARED_LOCKS_REQUIRED(mu1, mu2) { ... } -#define EXCLUSIVE_LOCKS_REQUIRED(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(exclusive_locks_required(__VA_ARGS__)) - -#define SHARED_LOCKS_REQUIRED(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(shared_locks_required(__VA_ARGS__)) - -// LOCKS_EXCLUDED() -// -// Documents the locks acquired in the body of the function. These locks -// cannot be held when calling this function (as Abseil's `Mutex` locks are -// non-reentrant). -#define LOCKS_EXCLUDED(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__)) - -// LOCK_RETURNED() -// -// Documents a function that returns a mutex without acquiring it. For example, -// a public getter method that returns a pointer to a private mutex should -// be annotated with LOCK_RETURNED. -#define LOCK_RETURNED(x) \ - THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x)) - -// LOCKABLE -// -// Documents if a class/type is a lockable type (such as the `Mutex` class). -#define LOCKABLE \ - THREAD_ANNOTATION_ATTRIBUTE__(lockable) - -// SCOPED_LOCKABLE -// -// Documents if a class does RAII locking (such as the `MutexLock` class). -// The constructor should use `LOCK_FUNCTION()` to specify the mutex that is -// acquired, and the destructor should use `UNLOCK_FUNCTION()` with no -// arguments; the analysis will assume that the destructor unlocks whatever the -// constructor locked. -#define SCOPED_LOCKABLE \ - THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable) - -// EXCLUSIVE_LOCK_FUNCTION() -// -// Documents functions that acquire a lock in the body of a function, and do -// not release it. -#define EXCLUSIVE_LOCK_FUNCTION(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(exclusive_lock_function(__VA_ARGS__)) - -// SHARED_LOCK_FUNCTION() -// -// Documents functions that acquire a shared (reader) lock in the body of a -// function, and do not release it. -#define SHARED_LOCK_FUNCTION(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(shared_lock_function(__VA_ARGS__)) - -// UNLOCK_FUNCTION() -// -// Documents functions that expect a lock to be held on entry to the function, -// and release it in the body of the function. -#define UNLOCK_FUNCTION(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(unlock_function(__VA_ARGS__)) - -// EXCLUSIVE_TRYLOCK_FUNCTION() / SHARED_TRYLOCK_FUNCTION() -// -// Documents functions that try to acquire a lock, and return success or failure -// (or a non-boolean value that can be interpreted as a boolean). -// The first argument should be `true` for functions that return `true` on -// success, or `false` for functions that return `false` on success. The second -// argument specifies the mutex that is locked on success. If unspecified, this -// mutex is assumed to be `this`. -#define EXCLUSIVE_TRYLOCK_FUNCTION(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(exclusive_trylock_function(__VA_ARGS__)) - -#define SHARED_TRYLOCK_FUNCTION(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(shared_trylock_function(__VA_ARGS__)) - -// ASSERT_EXCLUSIVE_LOCK() / ASSERT_SHARED_LOCK() -// -// Documents functions that dynamically check to see if a lock is held, and fail -// if it is not held. -#define ASSERT_EXCLUSIVE_LOCK(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(assert_exclusive_lock(__VA_ARGS__)) - -#define ASSERT_SHARED_LOCK(...) \ - THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_lock(__VA_ARGS__)) - -// NO_THREAD_SAFETY_ANALYSIS -// -// Turns off thread safety checking within the body of a particular function. -// This annotation is used to mark functions that are known to be correct, but -// the locking behavior is more complicated than the analyzer can handle. -#define NO_THREAD_SAFETY_ANALYSIS \ - THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis) - -//------------------------------------------------------------------------------ -// Tool-Supplied Annotations -//------------------------------------------------------------------------------ - -// TS_UNCHECKED should be placed around lock expressions that are not valid -// C++ syntax, but which are present for documentation purposes. These -// annotations will be ignored by the analysis. -#define TS_UNCHECKED(x) "" - -// TS_FIXME is used to mark lock expressions that are not valid C++ syntax. -// It is used by automated tools to mark and disable invalid expressions. -// The annotation should either be fixed, or changed to TS_UNCHECKED. -#define TS_FIXME(x) "" - -// Like NO_THREAD_SAFETY_ANALYSIS, this turns off checking within the body of -// a particular function. However, this attribute is used to mark functions -// that are incorrect and need to be fixed. It is used by automated tools to -// avoid breaking the build when the analysis is updated. -// Code owners are expected to eventually fix the routine. -#define NO_THREAD_SAFETY_ANALYSIS_FIXME NO_THREAD_SAFETY_ANALYSIS - -// Similar to NO_THREAD_SAFETY_ANALYSIS_FIXME, this macro marks a GUARDED_BY -// annotation that needs to be fixed, because it is producing thread safety -// warning. It disables the GUARDED_BY. -#define GUARDED_BY_FIXME(x) - -// Disables warnings for a single read operation. This can be used to avoid -// warnings when it is known that the read is not actually involved in a race, -// but the compiler cannot confirm that. -#define TS_UNCHECKED_READ(x) thread_safety_analysis::ts_unchecked_read(x) - - -namespace thread_safety_analysis { - -// Takes a reference to a guarded data member, and returns an unguarded -// reference. -template <typename T> -inline const T& ts_unchecked_read(const T& v) NO_THREAD_SAFETY_ANALYSIS { - return v; -} - -template <typename T> -inline T& ts_unchecked_read(T& v) NO_THREAD_SAFETY_ANALYSIS { - return v; -} - -} // namespace thread_safety_analysis - -#endif // ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/thread_identity.cc b/third_party/abseil_cpp/absl/base/internal/thread_identity.cc deleted file mode 100644 index d63a04ae91..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/thread_identity.cc +++ /dev/null @@ -1,152 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/thread_identity.h" - -#ifndef _WIN32 -#include <pthread.h> -#include <signal.h> -#endif - -#include <atomic> -#include <cassert> -#include <memory> - -#include "absl/base/call_once.h" -#include "absl/base/internal/raw_logging.h" -#include "absl/base/internal/spinlock.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -#if ABSL_THREAD_IDENTITY_MODE != ABSL_THREAD_IDENTITY_MODE_USE_CPP11 -namespace { -// Used to co-ordinate one-time creation of our pthread_key -absl::once_flag init_thread_identity_key_once; -pthread_key_t thread_identity_pthread_key; -std::atomic<bool> pthread_key_initialized(false); - -void AllocateThreadIdentityKey(ThreadIdentityReclaimerFunction reclaimer) { - pthread_key_create(&thread_identity_pthread_key, reclaimer); - pthread_key_initialized.store(true, std::memory_order_release); -} -} // namespace -#endif - -#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \ - ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 -// The actual TLS storage for a thread's currently associated ThreadIdentity. -// This is referenced by inline accessors in the header. -// "protected" visibility ensures that if multiple instances of Abseil code -// exist within a process (via dlopen() or similar), references to -// thread_identity_ptr from each instance of the code will refer to -// *different* instances of this ptr. -#ifdef __GNUC__ -__attribute__((visibility("protected"))) -#endif // __GNUC__ -#if ABSL_PER_THREAD_TLS -// Prefer __thread to thread_local as benchmarks indicate it is a bit faster. -ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity* thread_identity_ptr = nullptr; -#elif defined(ABSL_HAVE_THREAD_LOCAL) -thread_local ThreadIdentity* thread_identity_ptr = nullptr; -#endif // ABSL_PER_THREAD_TLS -#endif // TLS or CPP11 - -void SetCurrentThreadIdentity( - ThreadIdentity* identity, ThreadIdentityReclaimerFunction reclaimer) { - assert(CurrentThreadIdentityIfPresent() == nullptr); - // Associate our destructor. - // NOTE: This call to pthread_setspecific is currently the only immovable - // barrier to CurrentThreadIdentity() always being async signal safe. -#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC - // NOTE: Not async-safe. But can be open-coded. - absl::call_once(init_thread_identity_key_once, AllocateThreadIdentityKey, - reclaimer); - -#if defined(__EMSCRIPTEN__) || defined(__MINGW32__) - // Emscripten and MinGW pthread implementations does not support signals. - // See https://kripken.github.io/emscripten-site/docs/porting/pthreads.html - // for more information. - pthread_setspecific(thread_identity_pthread_key, - reinterpret_cast<void*>(identity)); -#else - // We must mask signals around the call to setspecific as with current glibc, - // a concurrent getspecific (needed for GetCurrentThreadIdentityIfPresent()) - // may zero our value. - // - // While not officially async-signal safe, getspecific within a signal handler - // is otherwise OK. - sigset_t all_signals; - sigset_t curr_signals; - sigfillset(&all_signals); - pthread_sigmask(SIG_SETMASK, &all_signals, &curr_signals); - pthread_setspecific(thread_identity_pthread_key, - reinterpret_cast<void*>(identity)); - pthread_sigmask(SIG_SETMASK, &curr_signals, nullptr); -#endif // !__EMSCRIPTEN__ && !__MINGW32__ - -#elif ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS - // NOTE: Not async-safe. But can be open-coded. - absl::call_once(init_thread_identity_key_once, AllocateThreadIdentityKey, - reclaimer); - pthread_setspecific(thread_identity_pthread_key, - reinterpret_cast<void*>(identity)); - thread_identity_ptr = identity; -#elif ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 - thread_local std::unique_ptr<ThreadIdentity, ThreadIdentityReclaimerFunction> - holder(identity, reclaimer); - thread_identity_ptr = identity; -#else -#error Unimplemented ABSL_THREAD_IDENTITY_MODE -#endif -} - -#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \ - ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 - -// Please see the comment on `CurrentThreadIdentityIfPresent` in -// thread_identity.h. Because DLLs cannot expose thread_local variables in -// headers, we opt for the correct-but-slower option of placing the definition -// of this function only in a translation unit inside DLL. -#if defined(ABSL_BUILD_DLL) || defined(ABSL_CONSUME_DLL) -ThreadIdentity* CurrentThreadIdentityIfPresent() { return thread_identity_ptr; } -#endif -#endif - -void ClearCurrentThreadIdentity() { -#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \ - ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 - thread_identity_ptr = nullptr; -#elif ABSL_THREAD_IDENTITY_MODE == \ - ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC - // pthread_setspecific expected to clear value on destruction - assert(CurrentThreadIdentityIfPresent() == nullptr); -#endif -} - -#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC -ThreadIdentity* CurrentThreadIdentityIfPresent() { - bool initialized = pthread_key_initialized.load(std::memory_order_acquire); - if (!initialized) { - return nullptr; - } - return reinterpret_cast<ThreadIdentity*>( - pthread_getspecific(thread_identity_pthread_key)); -} -#endif - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/thread_identity.h b/third_party/abseil_cpp/absl/base/internal/thread_identity.h deleted file mode 100644 index ceb109b41c..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/thread_identity.h +++ /dev/null @@ -1,259 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// Each active thread has an ThreadIdentity that may represent the thread in -// various level interfaces. ThreadIdentity objects are never deallocated. -// When a thread terminates, its ThreadIdentity object may be reused for a -// thread created later. - -#ifndef ABSL_BASE_INTERNAL_THREAD_IDENTITY_H_ -#define ABSL_BASE_INTERNAL_THREAD_IDENTITY_H_ - -#ifndef _WIN32 -#include <pthread.h> -// Defines __GOOGLE_GRTE_VERSION__ (via glibc-specific features.h) when -// supported. -#include <unistd.h> -#endif - -#include <atomic> -#include <cstdint> - -#include "absl/base/config.h" -#include "absl/base/internal/per_thread_tls.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN - -struct SynchLocksHeld; -struct SynchWaitParams; - -namespace base_internal { - -class SpinLock; -struct ThreadIdentity; - -// Used by the implementation of absl::Mutex and absl::CondVar. -struct PerThreadSynch { - // The internal representation of absl::Mutex and absl::CondVar rely - // on the alignment of PerThreadSynch. Both store the address of the - // PerThreadSynch in the high-order bits of their internal state, - // which means the low kLowZeroBits of the address of PerThreadSynch - // must be zero. - static constexpr int kLowZeroBits = 8; - static constexpr int kAlignment = 1 << kLowZeroBits; - - // Returns the associated ThreadIdentity. - // This can be implemented as a cast because we guarantee - // PerThreadSynch is the first element of ThreadIdentity. - ThreadIdentity* thread_identity() { - return reinterpret_cast<ThreadIdentity*>(this); - } - - PerThreadSynch *next; // Circular waiter queue; initialized to 0. - PerThreadSynch *skip; // If non-zero, all entries in Mutex queue - // up to and including "skip" have same - // condition as this, and will be woken later - bool may_skip; // if false while on mutex queue, a mutex unlocker - // is using this PerThreadSynch as a terminator. Its - // skip field must not be filled in because the loop - // might then skip over the terminator. - - // The wait parameters of the current wait. waitp is null if the - // thread is not waiting. Transitions from null to non-null must - // occur before the enqueue commit point (state = kQueued in - // Enqueue() and CondVarEnqueue()). Transitions from non-null to - // null must occur after the wait is finished (state = kAvailable in - // Mutex::Block() and CondVar::WaitCommon()). This field may be - // changed only by the thread that describes this PerThreadSynch. A - // special case is Fer(), which calls Enqueue() on another thread, - // but with an identical SynchWaitParams pointer, thus leaving the - // pointer unchanged. - SynchWaitParams *waitp; - - bool suppress_fatal_errors; // If true, try to proceed even in the face of - // broken invariants. This is used within fatal - // signal handlers to improve the chances of - // debug logging information being output - // successfully. - - intptr_t readers; // Number of readers in mutex. - int priority; // Priority of thread (updated every so often). - - // When priority will next be read (cycles). - int64_t next_priority_read_cycles; - - // State values: - // kAvailable: This PerThreadSynch is available. - // kQueued: This PerThreadSynch is unavailable, it's currently queued on a - // Mutex or CondVar waistlist. - // - // Transitions from kQueued to kAvailable require a release - // barrier. This is needed as a waiter may use "state" to - // independently observe that it's no longer queued. - // - // Transitions from kAvailable to kQueued require no barrier, they - // are externally ordered by the Mutex. - enum State { - kAvailable, - kQueued - }; - std::atomic<State> state; - - bool maybe_unlocking; // Valid at head of Mutex waiter queue; - // true if UnlockSlow could be searching - // for a waiter to wake. Used for an optimization - // in Enqueue(). true is always a valid value. - // Can be reset to false when the unlocker or any - // writer releases the lock, or a reader fully releases - // the lock. It may not be set to false by a reader - // that decrements the count to non-zero. - // protected by mutex spinlock - - bool wake; // This thread is to be woken from a Mutex. - - // If "x" is on a waiter list for a mutex, "x->cond_waiter" is true iff the - // waiter is waiting on the mutex as part of a CV Wait or Mutex Await. - // - // The value of "x->cond_waiter" is meaningless if "x" is not on a - // Mutex waiter list. - bool cond_waiter; - - // Locks held; used during deadlock detection. - // Allocated in Synch_GetAllLocks() and freed in ReclaimThreadIdentity(). - SynchLocksHeld *all_locks; -}; - -struct ThreadIdentity { - // Must be the first member. The Mutex implementation requires that - // the PerThreadSynch object associated with each thread is - // PerThreadSynch::kAlignment aligned. We provide this alignment on - // ThreadIdentity itself. - PerThreadSynch per_thread_synch; - - // Private: Reserved for absl::synchronization_internal::Waiter. - struct WaiterState { - char data[128]; - } waiter_state; - - // Used by PerThreadSem::{Get,Set}ThreadBlockedCounter(). - std::atomic<int>* blocked_count_ptr; - - // The following variables are mostly read/written just by the - // thread itself. The only exception is that these are read by - // a ticker thread as a hint. - std::atomic<int> ticker; // Tick counter, incremented once per second. - std::atomic<int> wait_start; // Ticker value when thread started waiting. - std::atomic<bool> is_idle; // Has thread become idle yet? - - ThreadIdentity* next; -}; - -// Returns the ThreadIdentity object representing the calling thread; guaranteed -// to be unique for its lifetime. The returned object will remain valid for the -// program's lifetime; although it may be re-assigned to a subsequent thread. -// If one does not exist, return nullptr instead. -// -// Does not malloc(*), and is async-signal safe. -// [*] Technically pthread_setspecific() does malloc on first use; however this -// is handled internally within tcmalloc's initialization already. -// -// New ThreadIdentity objects can be constructed and associated with a thread -// by calling GetOrCreateCurrentThreadIdentity() in per-thread-sem.h. -ThreadIdentity* CurrentThreadIdentityIfPresent(); - -using ThreadIdentityReclaimerFunction = void (*)(void*); - -// Sets the current thread identity to the given value. 'reclaimer' is a -// pointer to the global function for cleaning up instances on thread -// destruction. -void SetCurrentThreadIdentity(ThreadIdentity* identity, - ThreadIdentityReclaimerFunction reclaimer); - -// Removes the currently associated ThreadIdentity from the running thread. -// This must be called from inside the ThreadIdentityReclaimerFunction, and only -// from that function. -void ClearCurrentThreadIdentity(); - -// May be chosen at compile time via: -DABSL_FORCE_THREAD_IDENTITY_MODE=<mode -// index> -#ifdef ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC -#error ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC cannot be direcly set -#else -#define ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC 0 -#endif - -#ifdef ABSL_THREAD_IDENTITY_MODE_USE_TLS -#error ABSL_THREAD_IDENTITY_MODE_USE_TLS cannot be direcly set -#else -#define ABSL_THREAD_IDENTITY_MODE_USE_TLS 1 -#endif - -#ifdef ABSL_THREAD_IDENTITY_MODE_USE_CPP11 -#error ABSL_THREAD_IDENTITY_MODE_USE_CPP11 cannot be direcly set -#else -#define ABSL_THREAD_IDENTITY_MODE_USE_CPP11 2 -#endif - -#ifdef ABSL_THREAD_IDENTITY_MODE -#error ABSL_THREAD_IDENTITY_MODE cannot be direcly set -#elif defined(ABSL_FORCE_THREAD_IDENTITY_MODE) -#define ABSL_THREAD_IDENTITY_MODE ABSL_FORCE_THREAD_IDENTITY_MODE -#elif defined(_WIN32) && !defined(__MINGW32__) -#define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_CPP11 -#elif ABSL_PER_THREAD_TLS && defined(__GOOGLE_GRTE_VERSION__) && \ - (__GOOGLE_GRTE_VERSION__ >= 20140228L) -// Support for async-safe TLS was specifically added in GRTEv4. It's not -// present in the upstream eglibc. -// Note: Current default for production systems. -#define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_TLS -#else -#define ABSL_THREAD_IDENTITY_MODE \ - ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC -#endif - -#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \ - ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 - -#if ABSL_PER_THREAD_TLS -ABSL_CONST_INIT extern ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity* - thread_identity_ptr; -#elif defined(ABSL_HAVE_THREAD_LOCAL) -ABSL_CONST_INIT extern thread_local ThreadIdentity* thread_identity_ptr; -#else -#error Thread-local storage not detected on this platform -#endif - -// thread_local variables cannot be in headers exposed by DLLs. However, it is -// important for performance reasons in general that -// `CurrentThreadIdentityIfPresent` be inlined. This is not possible across a -// DLL boundary so, with DLLs, we opt to have the function not be inlined. Note -// that `CurrentThreadIdentityIfPresent` is declared above so we can exclude -// this entire inline definition when compiling as a DLL. -#if !defined(ABSL_BUILD_DLL) && !defined(ABSL_CONSUME_DLL) -inline ThreadIdentity* CurrentThreadIdentityIfPresent() { - return thread_identity_ptr; -} -#endif - -#elif ABSL_THREAD_IDENTITY_MODE != \ - ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC -#error Unknown ABSL_THREAD_IDENTITY_MODE -#endif - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_THREAD_IDENTITY_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/thread_identity_benchmark.cc b/third_party/abseil_cpp/absl/base/internal/thread_identity_benchmark.cc deleted file mode 100644 index 0ae10f2b1e..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/thread_identity_benchmark.cc +++ /dev/null @@ -1,38 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "benchmark/benchmark.h" -#include "absl/base/internal/thread_identity.h" -#include "absl/synchronization/internal/create_thread_identity.h" -#include "absl/synchronization/internal/per_thread_sem.h" - -namespace { - -void BM_SafeCurrentThreadIdentity(benchmark::State& state) { - for (auto _ : state) { - benchmark::DoNotOptimize( - absl::synchronization_internal::GetOrCreateCurrentThreadIdentity()); - } -} -BENCHMARK(BM_SafeCurrentThreadIdentity); - -void BM_UnsafeCurrentThreadIdentity(benchmark::State& state) { - for (auto _ : state) { - benchmark::DoNotOptimize( - absl::base_internal::CurrentThreadIdentityIfPresent()); - } -} -BENCHMARK(BM_UnsafeCurrentThreadIdentity); - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/thread_identity_test.cc b/third_party/abseil_cpp/absl/base/internal/thread_identity_test.cc deleted file mode 100644 index 624d5b96b6..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/thread_identity_test.cc +++ /dev/null @@ -1,129 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/thread_identity.h" - -#include <thread> // NOLINT(build/c++11) -#include <vector> - -#include "gtest/gtest.h" -#include "absl/base/attributes.h" -#include "absl/base/internal/spinlock.h" -#include "absl/base/macros.h" -#include "absl/base/thread_annotations.h" -#include "absl/synchronization/internal/per_thread_sem.h" -#include "absl/synchronization/mutex.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { -namespace { - -ABSL_CONST_INIT static absl::base_internal::SpinLock map_lock( - absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); -ABSL_CONST_INIT static int num_identities_reused ABSL_GUARDED_BY(map_lock); - -static const void* const kCheckNoIdentity = reinterpret_cast<void*>(1); - -static void TestThreadIdentityCurrent(const void* assert_no_identity) { - ThreadIdentity* identity; - - // We have to test this conditionally, because if the test framework relies - // on Abseil, then some previous action may have already allocated an - // identity. - if (assert_no_identity == kCheckNoIdentity) { - identity = CurrentThreadIdentityIfPresent(); - EXPECT_TRUE(identity == nullptr); - } - - identity = synchronization_internal::GetOrCreateCurrentThreadIdentity(); - EXPECT_TRUE(identity != nullptr); - ThreadIdentity* identity_no_init; - identity_no_init = CurrentThreadIdentityIfPresent(); - EXPECT_TRUE(identity == identity_no_init); - - // Check that per_thread_synch is correctly aligned. - EXPECT_EQ(0, reinterpret_cast<intptr_t>(&identity->per_thread_synch) % - PerThreadSynch::kAlignment); - EXPECT_EQ(identity, identity->per_thread_synch.thread_identity()); - - absl::base_internal::SpinLockHolder l(&map_lock); - num_identities_reused++; -} - -TEST(ThreadIdentityTest, BasicIdentityWorks) { - // This tests for the main() thread. - TestThreadIdentityCurrent(nullptr); -} - -TEST(ThreadIdentityTest, BasicIdentityWorksThreaded) { - // Now try the same basic test with multiple threads being created and - // destroyed. This makes sure that: - // - New threads are created without a ThreadIdentity. - // - We re-allocate ThreadIdentity objects from the free-list. - // - If a thread implementation chooses to recycle threads, that - // correct re-initialization occurs. - static const int kNumLoops = 3; - static const int kNumThreads = 400; - for (int iter = 0; iter < kNumLoops; iter++) { - std::vector<std::thread> threads; - for (int i = 0; i < kNumThreads; ++i) { - threads.push_back( - std::thread(TestThreadIdentityCurrent, kCheckNoIdentity)); - } - for (auto& thread : threads) { - thread.join(); - } - } - - // We should have recycled ThreadIdentity objects above; while (external) - // library threads allocating their own identities may preclude some - // reuse, we should have sufficient repetitions to exclude this. - absl::base_internal::SpinLockHolder l(&map_lock); - EXPECT_LT(kNumThreads, num_identities_reused); -} - -TEST(ThreadIdentityTest, ReusedThreadIdentityMutexTest) { - // This test repeatly creates and joins a series of threads, each of - // which acquires and releases shared Mutex locks. This verifies - // Mutex operations work correctly under a reused - // ThreadIdentity. Note that the most likely failure mode of this - // test is a crash or deadlock. - static const int kNumLoops = 10; - static const int kNumThreads = 12; - static const int kNumMutexes = 3; - static const int kNumLockLoops = 5; - - Mutex mutexes[kNumMutexes]; - for (int iter = 0; iter < kNumLoops; ++iter) { - std::vector<std::thread> threads; - for (int thread = 0; thread < kNumThreads; ++thread) { - threads.push_back(std::thread([&]() { - for (int l = 0; l < kNumLockLoops; ++l) { - for (int m = 0; m < kNumMutexes; ++m) { - MutexLock lock(&mutexes[m]); - } - } - })); - } - for (auto& thread : threads) { - thread.join(); - } - } -} - -} // namespace -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/throw_delegate.cc b/third_party/abseil_cpp/absl/base/internal/throw_delegate.cc deleted file mode 100644 index c055f75d9d..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/throw_delegate.cc +++ /dev/null @@ -1,108 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/throw_delegate.h" - -#include <cstdlib> -#include <functional> -#include <new> -#include <stdexcept> -#include "absl/base/config.h" -#include "absl/base/internal/raw_logging.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -namespace { -template <typename T> -[[noreturn]] void Throw(const T& error) { -#ifdef ABSL_HAVE_EXCEPTIONS - throw error; -#else - ABSL_RAW_LOG(FATAL, "%s", error.what()); - std::abort(); -#endif -} -} // namespace - -void ThrowStdLogicError(const std::string& what_arg) { - Throw(std::logic_error(what_arg)); -} -void ThrowStdLogicError(const char* what_arg) { - Throw(std::logic_error(what_arg)); -} -void ThrowStdInvalidArgument(const std::string& what_arg) { - Throw(std::invalid_argument(what_arg)); -} -void ThrowStdInvalidArgument(const char* what_arg) { - Throw(std::invalid_argument(what_arg)); -} - -void ThrowStdDomainError(const std::string& what_arg) { - Throw(std::domain_error(what_arg)); -} -void ThrowStdDomainError(const char* what_arg) { - Throw(std::domain_error(what_arg)); -} - -void ThrowStdLengthError(const std::string& what_arg) { - Throw(std::length_error(what_arg)); -} -void ThrowStdLengthError(const char* what_arg) { - Throw(std::length_error(what_arg)); -} - -void ThrowStdOutOfRange(const std::string& what_arg) { - Throw(std::out_of_range(what_arg)); -} -void ThrowStdOutOfRange(const char* what_arg) { - Throw(std::out_of_range(what_arg)); -} - -void ThrowStdRuntimeError(const std::string& what_arg) { - Throw(std::runtime_error(what_arg)); -} -void ThrowStdRuntimeError(const char* what_arg) { - Throw(std::runtime_error(what_arg)); -} - -void ThrowStdRangeError(const std::string& what_arg) { - Throw(std::range_error(what_arg)); -} -void ThrowStdRangeError(const char* what_arg) { - Throw(std::range_error(what_arg)); -} - -void ThrowStdOverflowError(const std::string& what_arg) { - Throw(std::overflow_error(what_arg)); -} -void ThrowStdOverflowError(const char* what_arg) { - Throw(std::overflow_error(what_arg)); -} - -void ThrowStdUnderflowError(const std::string& what_arg) { - Throw(std::underflow_error(what_arg)); -} -void ThrowStdUnderflowError(const char* what_arg) { - Throw(std::underflow_error(what_arg)); -} - -void ThrowStdBadFunctionCall() { Throw(std::bad_function_call()); } - -void ThrowStdBadAlloc() { Throw(std::bad_alloc()); } - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl diff --git a/third_party/abseil_cpp/absl/base/internal/throw_delegate.h b/third_party/abseil_cpp/absl/base/internal/throw_delegate.h deleted file mode 100644 index 075f527254..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/throw_delegate.h +++ /dev/null @@ -1,75 +0,0 @@ -// -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -#ifndef ABSL_BASE_INTERNAL_THROW_DELEGATE_H_ -#define ABSL_BASE_INTERNAL_THROW_DELEGATE_H_ - -#include <string> - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -// Helper functions that allow throwing exceptions consistently from anywhere. -// The main use case is for header-based libraries (eg templates), as they will -// be built by many different targets with their own compiler options. -// In particular, this will allow a safe way to throw exceptions even if the -// caller is compiled with -fno-exceptions. This is intended for implementing -// things like map<>::at(), which the standard documents as throwing an -// exception on error. -// -// Using other techniques like #if tricks could lead to ODR violations. -// -// You shouldn't use it unless you're writing code that you know will be built -// both with and without exceptions and you need to conform to an interface -// that uses exceptions. - -[[noreturn]] void ThrowStdLogicError(const std::string& what_arg); -[[noreturn]] void ThrowStdLogicError(const char* what_arg); -[[noreturn]] void ThrowStdInvalidArgument(const std::string& what_arg); -[[noreturn]] void ThrowStdInvalidArgument(const char* what_arg); -[[noreturn]] void ThrowStdDomainError(const std::string& what_arg); -[[noreturn]] void ThrowStdDomainError(const char* what_arg); -[[noreturn]] void ThrowStdLengthError(const std::string& what_arg); -[[noreturn]] void ThrowStdLengthError(const char* what_arg); -[[noreturn]] void ThrowStdOutOfRange(const std::string& what_arg); -[[noreturn]] void ThrowStdOutOfRange(const char* what_arg); -[[noreturn]] void ThrowStdRuntimeError(const std::string& what_arg); -[[noreturn]] void ThrowStdRuntimeError(const char* what_arg); -[[noreturn]] void ThrowStdRangeError(const std::string& what_arg); -[[noreturn]] void ThrowStdRangeError(const char* what_arg); -[[noreturn]] void ThrowStdOverflowError(const std::string& what_arg); -[[noreturn]] void ThrowStdOverflowError(const char* what_arg); -[[noreturn]] void ThrowStdUnderflowError(const std::string& what_arg); -[[noreturn]] void ThrowStdUnderflowError(const char* what_arg); - -[[noreturn]] void ThrowStdBadFunctionCall(); -[[noreturn]] void ThrowStdBadAlloc(); - -// ThrowStdBadArrayNewLength() cannot be consistently supported because -// std::bad_array_new_length is missing in libstdc++ until 4.9.0. -// https://gcc.gnu.org/onlinedocs/gcc-4.8.3/libstdc++/api/a01379_source.html -// https://gcc.gnu.org/onlinedocs/gcc-4.9.0/libstdc++/api/a01327_source.html -// libcxx (as of 3.2) and msvc (as of 2015) both have it. -// [[noreturn]] void ThrowStdBadArrayNewLength(); - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_THROW_DELEGATE_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/tsan_mutex_interface.h b/third_party/abseil_cpp/absl/base/internal/tsan_mutex_interface.h deleted file mode 100644 index 2a510603bc..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/tsan_mutex_interface.h +++ /dev/null @@ -1,66 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// This file is intended solely for spinlock.h. -// It provides ThreadSanitizer annotations for custom mutexes. -// See <sanitizer/tsan_interface.h> for meaning of these annotations. - -#ifndef ABSL_BASE_INTERNAL_TSAN_MUTEX_INTERFACE_H_ -#define ABSL_BASE_INTERNAL_TSAN_MUTEX_INTERFACE_H_ - -// ABSL_INTERNAL_HAVE_TSAN_INTERFACE -// Macro intended only for internal use. -// -// Checks whether LLVM Thread Sanitizer interfaces are available. -// First made available in LLVM 5.0 (Sep 2017). -#ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE -#error "ABSL_INTERNAL_HAVE_TSAN_INTERFACE cannot be directly set." -#endif - -#if defined(THREAD_SANITIZER) && defined(__has_include) -#if __has_include(<sanitizer/tsan_interface.h>) -#define ABSL_INTERNAL_HAVE_TSAN_INTERFACE 1 -#endif -#endif - -#ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE -#include <sanitizer/tsan_interface.h> - -#define ABSL_TSAN_MUTEX_CREATE __tsan_mutex_create -#define ABSL_TSAN_MUTEX_DESTROY __tsan_mutex_destroy -#define ABSL_TSAN_MUTEX_PRE_LOCK __tsan_mutex_pre_lock -#define ABSL_TSAN_MUTEX_POST_LOCK __tsan_mutex_post_lock -#define ABSL_TSAN_MUTEX_PRE_UNLOCK __tsan_mutex_pre_unlock -#define ABSL_TSAN_MUTEX_POST_UNLOCK __tsan_mutex_post_unlock -#define ABSL_TSAN_MUTEX_PRE_SIGNAL __tsan_mutex_pre_signal -#define ABSL_TSAN_MUTEX_POST_SIGNAL __tsan_mutex_post_signal -#define ABSL_TSAN_MUTEX_PRE_DIVERT __tsan_mutex_pre_divert -#define ABSL_TSAN_MUTEX_POST_DIVERT __tsan_mutex_post_divert - -#else - -#define ABSL_TSAN_MUTEX_CREATE(...) -#define ABSL_TSAN_MUTEX_DESTROY(...) -#define ABSL_TSAN_MUTEX_PRE_LOCK(...) -#define ABSL_TSAN_MUTEX_POST_LOCK(...) -#define ABSL_TSAN_MUTEX_PRE_UNLOCK(...) -#define ABSL_TSAN_MUTEX_POST_UNLOCK(...) -#define ABSL_TSAN_MUTEX_PRE_SIGNAL(...) -#define ABSL_TSAN_MUTEX_POST_SIGNAL(...) -#define ABSL_TSAN_MUTEX_PRE_DIVERT(...) -#define ABSL_TSAN_MUTEX_POST_DIVERT(...) - -#endif - -#endif // ABSL_BASE_INTERNAL_TSAN_MUTEX_INTERFACE_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/unaligned_access.h b/third_party/abseil_cpp/absl/base/internal/unaligned_access.h deleted file mode 100644 index 6be56c865b..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/unaligned_access.h +++ /dev/null @@ -1,158 +0,0 @@ -// -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// - -#ifndef ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_ -#define ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_ - -#include <string.h> - -#include <cstdint> - -#include "absl/base/attributes.h" -#include "absl/base/config.h" - -// unaligned APIs - -// Portable handling of unaligned loads, stores, and copies. - -// The unaligned API is C++ only. The declarations use C++ features -// (namespaces, inline) which are absent or incompatible in C. -#if defined(__cplusplus) - -#if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) ||\ - defined(MEMORY_SANITIZER) -// Consider we have an unaligned load/store of 4 bytes from address 0x...05. -// AddressSanitizer will treat it as a 3-byte access to the range 05:07 and -// will miss a bug if 08 is the first unaddressable byte. -// ThreadSanitizer will also treat this as a 3-byte access to 05:07 and will -// miss a race between this access and some other accesses to 08. -// MemorySanitizer will correctly propagate the shadow on unaligned stores -// and correctly report bugs on unaligned loads, but it may not properly -// update and report the origin of the uninitialized memory. -// For all three tools, replacing an unaligned access with a tool-specific -// callback solves the problem. - -// Make sure uint16_t/uint32_t/uint64_t are defined. -#include <stdint.h> - -extern "C" { -uint16_t __sanitizer_unaligned_load16(const void *p); -uint32_t __sanitizer_unaligned_load32(const void *p); -uint64_t __sanitizer_unaligned_load64(const void *p); -void __sanitizer_unaligned_store16(void *p, uint16_t v); -void __sanitizer_unaligned_store32(void *p, uint32_t v); -void __sanitizer_unaligned_store64(void *p, uint64_t v); -} // extern "C" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -inline uint16_t UnalignedLoad16(const void *p) { - return __sanitizer_unaligned_load16(p); -} - -inline uint32_t UnalignedLoad32(const void *p) { - return __sanitizer_unaligned_load32(p); -} - -inline uint64_t UnalignedLoad64(const void *p) { - return __sanitizer_unaligned_load64(p); -} - -inline void UnalignedStore16(void *p, uint16_t v) { - __sanitizer_unaligned_store16(p, v); -} - -inline void UnalignedStore32(void *p, uint32_t v) { - __sanitizer_unaligned_store32(p, v); -} - -inline void UnalignedStore64(void *p, uint64_t v) { - __sanitizer_unaligned_store64(p, v); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#define ABSL_INTERNAL_UNALIGNED_LOAD16(_p) \ - (absl::base_internal::UnalignedLoad16(_p)) -#define ABSL_INTERNAL_UNALIGNED_LOAD32(_p) \ - (absl::base_internal::UnalignedLoad32(_p)) -#define ABSL_INTERNAL_UNALIGNED_LOAD64(_p) \ - (absl::base_internal::UnalignedLoad64(_p)) - -#define ABSL_INTERNAL_UNALIGNED_STORE16(_p, _val) \ - (absl::base_internal::UnalignedStore16(_p, _val)) -#define ABSL_INTERNAL_UNALIGNED_STORE32(_p, _val) \ - (absl::base_internal::UnalignedStore32(_p, _val)) -#define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \ - (absl::base_internal::UnalignedStore64(_p, _val)) - -#else - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -inline uint16_t UnalignedLoad16(const void *p) { - uint16_t t; - memcpy(&t, p, sizeof t); - return t; -} - -inline uint32_t UnalignedLoad32(const void *p) { - uint32_t t; - memcpy(&t, p, sizeof t); - return t; -} - -inline uint64_t UnalignedLoad64(const void *p) { - uint64_t t; - memcpy(&t, p, sizeof t); - return t; -} - -inline void UnalignedStore16(void *p, uint16_t v) { memcpy(p, &v, sizeof v); } - -inline void UnalignedStore32(void *p, uint32_t v) { memcpy(p, &v, sizeof v); } - -inline void UnalignedStore64(void *p, uint64_t v) { memcpy(p, &v, sizeof v); } - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#define ABSL_INTERNAL_UNALIGNED_LOAD16(_p) \ - (absl::base_internal::UnalignedLoad16(_p)) -#define ABSL_INTERNAL_UNALIGNED_LOAD32(_p) \ - (absl::base_internal::UnalignedLoad32(_p)) -#define ABSL_INTERNAL_UNALIGNED_LOAD64(_p) \ - (absl::base_internal::UnalignedLoad64(_p)) - -#define ABSL_INTERNAL_UNALIGNED_STORE16(_p, _val) \ - (absl::base_internal::UnalignedStore16(_p, _val)) -#define ABSL_INTERNAL_UNALIGNED_STORE32(_p, _val) \ - (absl::base_internal::UnalignedStore32(_p, _val)) -#define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \ - (absl::base_internal::UnalignedStore64(_p, _val)) - -#endif - -#endif // defined(__cplusplus), end of unaligned API - -#endif // ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_ diff --git a/third_party/abseil_cpp/absl/base/internal/unique_small_name_test.cc b/third_party/abseil_cpp/absl/base/internal/unique_small_name_test.cc deleted file mode 100644 index ff8c2b3fb4..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/unique_small_name_test.cc +++ /dev/null @@ -1,77 +0,0 @@ -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "gtest/gtest.h" -#include "absl/base/optimization.h" -#include "absl/strings/string_view.h" - -// This test by itself does not do anything fancy, but it serves as binary I can -// query in shell test. - -namespace { - -template <class T> -void DoNotOptimize(const T& var) { -#ifdef __GNUC__ - asm volatile("" : "+m"(const_cast<T&>(var))); -#else - std::cout << (void*)&var; -#endif -} - -int very_long_int_variable_name ABSL_INTERNAL_UNIQUE_SMALL_NAME() = 0; -char very_long_str_variable_name[] ABSL_INTERNAL_UNIQUE_SMALL_NAME() = "abc"; - -TEST(UniqueSmallName, NonAutomaticVar) { - EXPECT_EQ(very_long_int_variable_name, 0); - EXPECT_EQ(absl::string_view(very_long_str_variable_name), "abc"); -} - -int VeryLongFreeFunctionName() ABSL_INTERNAL_UNIQUE_SMALL_NAME(); - -TEST(UniqueSmallName, FreeFunction) { - DoNotOptimize(&VeryLongFreeFunctionName); - - EXPECT_EQ(VeryLongFreeFunctionName(), 456); -} - -int VeryLongFreeFunctionName() { return 456; } - -struct VeryLongStructName { - explicit VeryLongStructName(int i); - - int VeryLongMethodName() ABSL_INTERNAL_UNIQUE_SMALL_NAME(); - - static int VeryLongStaticMethodName() ABSL_INTERNAL_UNIQUE_SMALL_NAME(); - - private: - int fld; -}; - -TEST(UniqueSmallName, Struct) { - VeryLongStructName var(10); - - DoNotOptimize(var); - DoNotOptimize(&VeryLongStructName::VeryLongMethodName); - DoNotOptimize(&VeryLongStructName::VeryLongStaticMethodName); - - EXPECT_EQ(var.VeryLongMethodName(), 10); - EXPECT_EQ(VeryLongStructName::VeryLongStaticMethodName(), 123); -} - -VeryLongStructName::VeryLongStructName(int i) : fld(i) {} -int VeryLongStructName::VeryLongMethodName() { return fld; } -int VeryLongStructName::VeryLongStaticMethodName() { return 123; } - -} // namespace diff --git a/third_party/abseil_cpp/absl/base/internal/unscaledcycleclock.cc b/third_party/abseil_cpp/absl/base/internal/unscaledcycleclock.cc deleted file mode 100644 index f1e7bbef84..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/unscaledcycleclock.cc +++ /dev/null @@ -1,140 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/unscaledcycleclock.h" - -#if ABSL_USE_UNSCALED_CYCLECLOCK - -#if defined(_WIN32) -#include <intrin.h> -#endif - -#if defined(__powerpc__) || defined(__ppc__) -#ifdef __GLIBC__ -#include <sys/platform/ppc.h> -#elif defined(__FreeBSD__) -#include <sys/sysctl.h> -#include <sys/types.h> -#endif -#endif - -#include "absl/base/internal/sysinfo.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -#if defined(__i386__) - -int64_t UnscaledCycleClock::Now() { - int64_t ret; - __asm__ volatile("rdtsc" : "=A"(ret)); - return ret; -} - -double UnscaledCycleClock::Frequency() { - return base_internal::NominalCPUFrequency(); -} - -#elif defined(__x86_64__) - -int64_t UnscaledCycleClock::Now() { - uint64_t low, high; - __asm__ volatile("rdtsc" : "=a"(low), "=d"(high)); - return (high << 32) | low; -} - -double UnscaledCycleClock::Frequency() { - return base_internal::NominalCPUFrequency(); -} - -#elif defined(__powerpc__) || defined(__ppc__) - -int64_t UnscaledCycleClock::Now() { -#ifdef __GLIBC__ - return __ppc_get_timebase(); -#else -#ifdef __powerpc64__ - int64_t tbr; - asm volatile("mfspr %0, 268" : "=r"(tbr)); - return tbr; -#else - int32_t tbu, tbl, tmp; - asm volatile( - "0:\n" - "mftbu %[hi32]\n" - "mftb %[lo32]\n" - "mftbu %[tmp]\n" - "cmpw %[tmp],%[hi32]\n" - "bne 0b\n" - : [ hi32 ] "=r"(tbu), [ lo32 ] "=r"(tbl), [ tmp ] "=r"(tmp)); - return (static_cast<int64_t>(tbu) << 32) | tbl; -#endif -#endif -} - -double UnscaledCycleClock::Frequency() { -#ifdef __GLIBC__ - return __ppc_get_timebase_freq(); -#elif defined(__FreeBSD__) - static once_flag init_timebase_frequency_once; - static double timebase_frequency = 0.0; - base_internal::LowLevelCallOnce(&init_timebase_frequency_once, [&]() { - size_t length = sizeof(timebase_frequency); - sysctlbyname("kern.timecounter.tc.timebase.frequency", &timebase_frequency, - &length, nullptr, 0); - }); - return timebase_frequency; -#else -#error Must implement UnscaledCycleClock::Frequency() -#endif -} - -#elif defined(__aarch64__) - -// System timer of ARMv8 runs at a different frequency than the CPU's. -// The frequency is fixed, typically in the range 1-50MHz. It can be -// read at CNTFRQ special register. We assume the OS has set up -// the virtual timer properly. -int64_t UnscaledCycleClock::Now() { - int64_t virtual_timer_value; - asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value)); - return virtual_timer_value; -} - -double UnscaledCycleClock::Frequency() { - uint64_t aarch64_timer_frequency; - asm volatile("mrs %0, cntfrq_el0" : "=r"(aarch64_timer_frequency)); - return aarch64_timer_frequency; -} - -#elif defined(_M_IX86) || defined(_M_X64) - -#pragma intrinsic(__rdtsc) - -int64_t UnscaledCycleClock::Now() { - return __rdtsc(); -} - -double UnscaledCycleClock::Frequency() { - return base_internal::NominalCPUFrequency(); -} - -#endif - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_USE_UNSCALED_CYCLECLOCK diff --git a/third_party/abseil_cpp/absl/base/internal/unscaledcycleclock.h b/third_party/abseil_cpp/absl/base/internal/unscaledcycleclock.h deleted file mode 100644 index cdce9bf8a8..0000000000 --- a/third_party/abseil_cpp/absl/base/internal/unscaledcycleclock.h +++ /dev/null @@ -1,124 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// UnscaledCycleClock -// An UnscaledCycleClock yields the value and frequency of a cycle counter -// that increments at a rate that is approximately constant. -// This class is for internal / whitelisted use only, you should consider -// using CycleClock instead. -// -// Notes: -// The cycle counter frequency is not necessarily the core clock frequency. -// That is, CycleCounter cycles are not necessarily "CPU cycles". -// -// An arbitrary offset may have been added to the counter at power on. -// -// On some platforms, the rate and offset of the counter may differ -// slightly when read from different CPUs of a multiprocessor. Usually, -// we try to ensure that the operating system adjusts values periodically -// so that values agree approximately. If you need stronger guarantees, -// consider using alternate interfaces. -// -// The CPU is not required to maintain the ordering of a cycle counter read -// with respect to surrounding instructions. - -#ifndef ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_H_ -#define ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_H_ - -#include <cstdint> - -#if defined(__APPLE__) -#include <TargetConditionals.h> -#endif - -#include "absl/base/port.h" - -// The following platforms have an implementation of a hardware counter. -#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \ - defined(__powerpc__) || defined(__ppc__) || \ - defined(_M_IX86) || defined(_M_X64) -#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1 -#else -#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 0 -#endif - -// The following platforms often disable access to the hardware -// counter (through a sandbox) even if the underlying hardware has a -// usable counter. The CycleTimer interface also requires a *scaled* -// CycleClock that runs at atleast 1 MHz. We've found some Android -// ARM64 devices where this is not the case, so we disable it by -// default on Android ARM64. -#if defined(__native_client__) || \ - (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) || \ - (defined(__ANDROID__) && defined(__aarch64__)) -#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 0 -#else -#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 1 -#endif - -// UnscaledCycleClock is an optional internal feature. -// Use "#if ABSL_USE_UNSCALED_CYCLECLOCK" to test for its presence. -// Can be overridden at compile-time via -DABSL_USE_UNSCALED_CYCLECLOCK=0|1 -#if !defined(ABSL_USE_UNSCALED_CYCLECLOCK) -#define ABSL_USE_UNSCALED_CYCLECLOCK \ - (ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION && \ - ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT) -#endif - -#if ABSL_USE_UNSCALED_CYCLECLOCK - -// This macro can be used to test if UnscaledCycleClock::Frequency() -// is NominalCPUFrequency() on a particular platform. -#if (defined(__i386__) || defined(__x86_64__) || \ - defined(_M_IX86) || defined(_M_X64)) -#define ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY -#endif - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace time_internal { -class UnscaledCycleClockWrapperForGetCurrentTime; -} // namespace time_internal - -namespace base_internal { -class CycleClock; -class UnscaledCycleClockWrapperForInitializeFrequency; - -class UnscaledCycleClock { - private: - UnscaledCycleClock() = delete; - - // Return the value of a cycle counter that counts at a rate that is - // approximately constant. - static int64_t Now(); - - // Return the how much UnscaledCycleClock::Now() increases per second. - // This is not necessarily the core CPU clock frequency. - // It may be the nominal value report by the kernel, rather than a measured - // value. - static double Frequency(); - - // Whitelisted friends. - friend class base_internal::CycleClock; - friend class time_internal::UnscaledCycleClockWrapperForGetCurrentTime; - friend class base_internal::UnscaledCycleClockWrapperForInitializeFrequency; -}; - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_USE_UNSCALED_CYCLECLOCK - -#endif // ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_H_ |