summaryrefslogtreecommitdiff
path: root/absl/debugging/internal
diff options
context:
space:
mode:
authorGravatar Abseil Team <absl-team@google.com>2017-09-24 08:20:48 -0700
committerGravatar Derek Mauro <dmauro@google.com>2017-09-25 10:12:29 -0400
commitcf6ab6bb2b800fae859ccc735f398d22a7336a00 (patch)
treeee16a94d16734d11f9e91518038e2712ca025433 /absl/debugging/internal
parent53c239d1fc161975dad32c654e1f42c0ec42f547 (diff)
Changes imported from Abseil "staging" branch:
- 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
Diffstat (limited to 'absl/debugging/internal')
-rw-r--r--absl/debugging/internal/address_is_readable.cc1
-rw-r--r--absl/debugging/internal/stacktrace_config.h8
-rw-r--r--absl/debugging/internal/stacktrace_libunwind-inl.inc128
3 files changed, 3 insertions, 134 deletions
diff --git a/absl/debugging/internal/address_is_readable.cc b/absl/debugging/internal/address_is_readable.cc
index 037ea54c..30d2e71d 100644
--- a/absl/debugging/internal/address_is_readable.cc
+++ b/absl/debugging/internal/address_is_readable.cc
@@ -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>
diff --git a/absl/debugging/internal/stacktrace_config.h b/absl/debugging/internal/stacktrace_config.h
index c0df5bb0..57f0b0f2 100644
--- a/absl/debugging/internal/stacktrace_config.h
+++ b/absl/debugging/internal/stacktrace_config.h
@@ -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"
diff --git a/absl/debugging/internal/stacktrace_libunwind-inl.inc b/absl/debugging/internal/stacktrace_libunwind-inl.inc
deleted file mode 100644
index e9c2d26a..00000000
--- a/absl/debugging/internal/stacktrace_libunwind-inl.inc
+++ /dev/null
@@ -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_