diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/debugging/internal/examine_stack.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/debugging/internal/examine_stack.cc | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/third_party/abseil_cpp/absl/debugging/internal/examine_stack.cc b/third_party/abseil_cpp/absl/debugging/internal/examine_stack.cc deleted file mode 100644 index 6e5ff1fbd8..0000000000 --- a/third_party/abseil_cpp/absl/debugging/internal/examine_stack.cc +++ /dev/null @@ -1,187 +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/debugging/internal/examine_stack.h" - -#ifndef _WIN32 -#include <unistd.h> -#endif - -#ifdef __APPLE__ -#include <sys/ucontext.h> -#endif - -#include <csignal> -#include <cstdio> - -#include "absl/base/attributes.h" -#include "absl/base/internal/raw_logging.h" -#include "absl/base/macros.h" -#include "absl/debugging/stacktrace.h" -#include "absl/debugging/symbolize.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace debugging_internal { - -// Returns the program counter from signal context, nullptr if -// unknown. vuc is a ucontext_t*. We use void* to avoid the use of -// ucontext_t on non-POSIX systems. -void* GetProgramCounter(void* vuc) { -#ifdef __linux__ - if (vuc != nullptr) { - ucontext_t* context = reinterpret_cast<ucontext_t*>(vuc); -#if defined(__aarch64__) - return reinterpret_cast<void*>(context->uc_mcontext.pc); -#elif defined(__arm__) - return reinterpret_cast<void*>(context->uc_mcontext.arm_pc); -#elif defined(__i386__) - if (14 < ABSL_ARRAYSIZE(context->uc_mcontext.gregs)) - return reinterpret_cast<void*>(context->uc_mcontext.gregs[14]); -#elif defined(__mips__) - return reinterpret_cast<void*>(context->uc_mcontext.pc); -#elif defined(__powerpc64__) - return reinterpret_cast<void*>(context->uc_mcontext.gp_regs[32]); -#elif defined(__powerpc__) - return reinterpret_cast<void*>(context->uc_mcontext.regs->nip); -#elif defined(__riscv) - return reinterpret_cast<void*>(context->uc_mcontext.__gregs[REG_PC]); -#elif defined(__s390__) && !defined(__s390x__) - return reinterpret_cast<void*>(context->uc_mcontext.psw.addr & 0x7fffffff); -#elif defined(__s390__) && defined(__s390x__) - return reinterpret_cast<void*>(context->uc_mcontext.psw.addr); -#elif defined(__x86_64__) - if (16 < ABSL_ARRAYSIZE(context->uc_mcontext.gregs)) - return reinterpret_cast<void*>(context->uc_mcontext.gregs[16]); -#else -#error "Undefined Architecture." -#endif - } -#elif defined(__APPLE__) - if (vuc != nullptr) { - ucontext_t* signal_ucontext = reinterpret_cast<ucontext_t*>(vuc); -#if defined(__aarch64__) - return reinterpret_cast<void*>( - __darwin_arm_thread_state64_get_pc(signal_ucontext->uc_mcontext->__ss)); -#elif defined(__arm__) -#if __DARWIN_UNIX03 - return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->__ss.__pc); -#else - return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->ss.pc); -#endif -#elif defined(__i386__) -#if __DARWIN_UNIX03 - return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->__ss.__eip); -#else - return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->ss.eip); -#endif -#elif defined(__x86_64__) -#if __DARWIN_UNIX03 - return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->__ss.__rip); -#else - return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->ss.rip); -#endif -#endif - } -#elif defined(__akaros__) - auto* ctx = reinterpret_cast<struct user_context*>(vuc); - return reinterpret_cast<void*>(get_user_ctx_pc(ctx)); -#endif - static_cast<void>(vuc); - return nullptr; -} - -// The %p field width for printf() functions is two characters per byte, -// and two extra for the leading "0x". -static constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*); - -// Print a program counter, its stack frame size, and its symbol name. -// Note that there is a separate symbolize_pc argument. Return addresses may be -// at the end of the function, and this allows the caller to back up from pc if -// appropriate. -static void DumpPCAndFrameSizeAndSymbol(void (*writerfn)(const char*, void*), - void* writerfn_arg, void* pc, - void* symbolize_pc, int framesize, - const char* const prefix) { - char tmp[1024]; - const char* symbol = "(unknown)"; - if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) { - symbol = tmp; - } - char buf[1024]; - if (framesize <= 0) { - snprintf(buf, sizeof(buf), "%s@ %*p (unknown) %s\n", prefix, - kPrintfPointerFieldWidth, pc, symbol); - } else { - snprintf(buf, sizeof(buf), "%s@ %*p %9d %s\n", prefix, - kPrintfPointerFieldWidth, pc, framesize, symbol); - } - writerfn(buf, writerfn_arg); -} - -// Print a program counter and the corresponding stack frame size. -static void DumpPCAndFrameSize(void (*writerfn)(const char*, void*), - void* writerfn_arg, void* pc, int framesize, - const char* const prefix) { - char buf[100]; - if (framesize <= 0) { - snprintf(buf, sizeof(buf), "%s@ %*p (unknown)\n", prefix, - kPrintfPointerFieldWidth, pc); - } else { - snprintf(buf, sizeof(buf), "%s@ %*p %9d\n", prefix, - kPrintfPointerFieldWidth, pc, framesize); - } - writerfn(buf, writerfn_arg); -} - -void DumpPCAndFrameSizesAndStackTrace( - void* pc, void* const stack[], int frame_sizes[], int depth, - int min_dropped_frames, bool symbolize_stacktrace, - void (*writerfn)(const char*, void*), void* writerfn_arg) { - if (pc != nullptr) { - // We don't know the stack frame size for PC, use 0. - if (symbolize_stacktrace) { - DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, pc, pc, 0, "PC: "); - } else { - DumpPCAndFrameSize(writerfn, writerfn_arg, pc, 0, "PC: "); - } - } - for (int i = 0; i < depth; i++) { - if (symbolize_stacktrace) { - // Pass the previous address of pc as the symbol address because pc is a - // return address, and an overrun may occur when the function ends with a - // call to a function annotated noreturn (e.g. CHECK). Note that we don't - // do this for pc above, as the adjustment is only correct for return - // addresses. - DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, stack[i], - reinterpret_cast<char*>(stack[i]) - 1, - frame_sizes[i], " "); - } else { - DumpPCAndFrameSize(writerfn, writerfn_arg, stack[i], frame_sizes[i], - " "); - } - } - if (min_dropped_frames > 0) { - char buf[100]; - snprintf(buf, sizeof(buf), " @ ... and at least %d more frames\n", - min_dropped_frames); - writerfn(buf, writerfn_arg); - } -} - -} // namespace debugging_internal -ABSL_NAMESPACE_END -} // namespace absl |