chore(3p/abseil_cpp): unvendor abseil_cpp r/3786

we weren't actually using these sources anymore, okay?

Change-Id: If701571d9716de308d3512e1eb22c35db0877a66
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 166 deletions

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 16accf096604..000000000000
--- 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_