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Changes imported from Abseil "staging" branch:

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- b527a3e4b36b644ac424e3c525b1cd393f6f6c40 Fix some typos in the usage examples by Jorg Brown <jorg@google.com>
  - 82be4a9adf3bb0ddafc0d46274969c99afffe870 Fix typo in optional.h comment. by Abseil Team <absl-team@google.com>
  - d6ee63bf8fc51fba074c23b33cebc28c808d7f07 Remove internal-only identifiers from code. by Daniel Katz <katzdm@google.com>
  - f9c3ad2f0d73f53b21603638af8b4bed636e79f4 Use easier understandable names for absl::StartsWith and ... by Abseil Team <absl-team@google.com>
  - 7c16c14fefee89c927b8789d6043c4691bcffc9b Add -Wno-missing-prototypes back to the LLVM copts. by Derek Mauro <dmauro@google.com>
  - 2f4b7d2e50c7023240242f1e15db60ccd7e8768d IWYU | absl/strings by Juemin Yang <jueminyang@google.com>
  - a99cbcc1daa34a2d6a2bb26de275e05173cc77e9 IWYU | absl/type by Juemin Yang <jueminyang@google.com>
  - 12e1146d0fc76c071d7e0ebaabb62f0a984fae66 Use LLVM_FLAGS and LLVM_TEST_FLAGS when --compiler=llvm. by Derek Mauro <dmauro@google.com>
  - cd6bea616abda558d0bace5bd77455662a233688 IWYU | absl/debugging by Juemin Yang <jueminyang@google.com>
  - d9a7382e59d46a8581b6b7a31cd5a48bb89326e9 IWYU | absl/synchronization by Juemin Yang <jueminyang@google.com>
  - 07ec7d6d5a4a666f4183c5d0ed9c342baa7b24bc IWYU | absl/numeric by Juemin Yang <jueminyang@google.com>
  - 12bfe40051f4270f8707e191af5652f83f2f750c Remove the RoundTrip{Float,Double}ToBuffer routines from ... by Jorg Brown <jorg@google.com>
  - eeb4fd67c9d97f66cb9475c3c5e51ab132f1c810 Adds conversion functions for converting between absl/tim... by Greg Miller <jgm@google.com>
  - 59a2108d05d4ea85dc5cc11e49b2cd2335d4295a Change Substitute to use %.6g formatting rather than 15/1... by Jorg Brown <jorg@google.com>
  - 394becb48e0fcd161642cdaac5120d32567e0ef8 IWYU | absl/meta by Juemin Yang <jueminyang@google.com>
  - 1e5da6e8da336699b2469dcf6dda025b9b0ec4c9 Rewrite atomic_hook.h to not use std::atomic<T*> under Wi... by Greg Falcon <gfalcon@google.com>

GitOrigin-RevId: b527a3e4b36b644ac424e3c525b1cd393f6f6c40
Change-Id: I14e331d91c956ef045ac7927091a9f179716de0c
This commit is contained in:
Abseil Team 2017-09-24 08:20:48 -07:00 • committed by Derek Mauro
parent 53c239d1fc
commit cf6ab6bb2b
68 changed files with 629 additions and 831 deletions
Download patch file Download diff file Expand all files Collapse all files

1
absl/debugging/BUILD.bazel
View file

@ -53,7 +53,6 @@ cc_library(
"internal/stacktrace_arm-inl.inc",
"internal/stacktrace_config.h",
"internal/stacktrace_generic-inl.inc",
"internal/stacktrace_libunwind-inl.inc",
"internal/stacktrace_powerpc-inl.inc",
"internal/stacktrace_unimplemented-inl.inc",
"internal/stacktrace_win32-inl.inc",

1
absl/debugging/internal/address_is_readable.cc
View file

@ -33,7 +33,6 @@ bool AddressIsReadable(const void* /* addr */) { return true; }
#include <fcntl.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <atomic>
#include <cerrno>
#include <cstdint>

8
absl/debugging/internal/stacktrace_config.h
View file

@ -25,15 +25,13 @@
#if ABSL_STACKTRACE_INL_HEADER
#error ABSL_STACKTRACE_INL_HEADER cannot be directly set
#elif defined(__native_client__) || defined(__APPLE__) || \
defined(__ANDROID__) || defined(__myriad2__) || defined(__asmjs__) || \
defined(__Fuchsia__) || defined(__GENCLAVE__) || \
defined(GOOGLE_UNSUPPORTED_OS_HERCULES)
defined(__ANDROID__) || defined(__myriad2__) || defined(asmjs__) || \
defined(__Fuchsia__)
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_unimplemented-inl.inc"
// Next, test for Mips and Windows.
// TODO(marmstrong): http://b/21334018: Mips case, remove the check for
// ABSL_STACKTRACE_INL_HEADER.
// TODO(marmstrong): Mips case, remove the check for ABSL_STACKTRACE_INL_HEADER
#elif defined(__mips__) && !defined(ABSL_STACKTRACE_INL_HEADER)
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_unimplemented-inl.inc"

128
absl/debugging/internal/stacktrace_libunwind-inl.inc
View file

@ -1,128 +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
//
// http://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_DEBUGGING_INTERNAL_STACKTRACE_LIBUNWIND_INL_H_
#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_LIBUNWIND_INL_H_
// We only need local unwinder.
#define UNW_LOCAL_ONLY
extern "C" {
#include "third_party/libunwind/include/libunwind.h"
}
#include "absl/debugging/stacktrace.h"
#include "absl/base/dynamic_annotations.h"
#include "absl/base/internal/raw_logging.h"
// Sometimes, we can try to get a stack trace from within a stack
// trace, because we don't block signals inside libunwind (which would be too
// expensive: the two extra system calls per stack trace do matter here).
// That can cause a self-deadlock (as in http://b/5722312).
// Protect against such reentrant call by failing to get a stack trace.
//
// We use __thread here because the code here is extremely low level -- it is
// called while collecting stack traces from within malloc and mmap, and thus
// can not call anything which might call malloc or mmap itself.
// In particular, using PerThread or STATIC_THREAD_LOCAL_POD
// here will cause infinite recursion for at least dbg/piii builds with
// crosstool-v12.
static __thread int recursive;
template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
const void *, int *min_dropped_frames) {
if (recursive) {
return 0;
}
++recursive;
int n = 0;
if (IS_STACK_FRAMES) {
void *ip;
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t sp = 0, next_sp = 0;
unw_getcontext(&uc);
ABSL_RAW_CHECK(unw_init_local(&cursor, &uc) >= 0, "unw_init_local failed");
skip_count++; // Do not include current frame
while (skip_count--) {
if (unw_step(&cursor) <= 0) {
goto out;
}
if (unw_get_reg(&cursor, UNW_REG_SP, &next_sp)) {
goto out;
}
}
while (n < max_depth) {
if (unw_get_reg(&cursor, UNW_REG_IP, (unw_word_t *) &ip) < 0) {
break;
}
sizes[n] = 0;
result[n++] = ip;
if (unw_step(&cursor) <= 0) {
break;
}
sp = next_sp;
if (unw_get_reg(&cursor, UNW_REG_SP, &next_sp) , 0) {
break;
}
sizes[n - 1] = next_sp - sp;
}
if (min_dropped_frames != nullptr) {
// Implementation detail: we clamp the max of frames we are willing to
// count, so as not to spend too much time in the loop below.
const int kMaxUnwind = 200;
int j = 0;
for (; j < kMaxUnwind; j++) {
if (unw_step(&cursor) < 0) {
break;
}
}
*min_dropped_frames = j;
}
} else {
skip_count++; // Do not include current frame.
void **result_all = reinterpret_cast<void**>(
alloca(sizeof(void*) * (max_depth + skip_count)));
int rc = unw_backtrace(result_all, max_depth + skip_count);
if (rc > 0) {
// Tell MSan that result_all has been initialized. b/34965936.
ANNOTATE_MEMORY_IS_INITIALIZED(result_all, rc * sizeof(void*));
}
if (rc > skip_count) {
memcpy(result, &result_all[skip_count],
sizeof(void*) * (rc - skip_count));
n = rc - skip_count;
} else {
n = 0;
}
if (min_dropped_frames != nullptr) {
// Not implemented.
*min_dropped_frames = 0;
}
}
out:
--recursive;
return n;
}
#endif // ABSL_DEBUGGING_INTERNAL_STACKTRACE_LIBUNWIND_INL_H_

3
absl/debugging/leak_check_test.cc
View file

@ -12,7 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
#include <memory>
#include <string>
#include "gtest/gtest.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/debugging/leak_check.h"

12
absl/debugging/stacktrace.cc
View file

@ -38,6 +38,7 @@
#include <atomic>
#include "absl/base/attributes.h"
#include "absl/base/port.h"
#include "absl/debugging/internal/stacktrace_config.h"
@ -45,14 +46,13 @@
#include ABSL_STACKTRACE_INL_HEADER
#else
# error Cannot calculate stack trace: will need to write for your environment
# include "absl/debugging/internal/stacktrace_x86-inl.inc"
# include "absl/debugging/internal/stacktrace_win32-inl.inc"
# include "absl/debugging/internal/stacktrace_unimplemented-inl.inc"
# include "absl/debugging/internal/stacktrace_libunwind-inl.inc"
# include "absl/debugging/internal/stacktrace_aarch64-inl.inc"
# include "absl/debugging/internal/stacktrace_arm-inl.inc"
# include "absl/debugging/internal/stacktrace_generic-inl.inc"
# include "absl/debugging/internal/stacktrace_powerpc-inl.inc"
# include "absl/debugging/internal/stacktrace_arm-inl.inc"
# include "absl/debugging/internal/stacktrace_aarch64-inl.inc"
# include "absl/debugging/internal/stacktrace_unimplemented-inl.inc"
# include "absl/debugging/internal/stacktrace_win32-inl.inc"
# include "absl/debugging/internal/stacktrace_x86-inl.inc"
#endif
namespace absl {