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Remove stack trace fixup code from Abseil

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PiperOrigin-RevId: 875236816
Change-Id: I88f7d894cc30d23c77b7d43953fe4d85deb65728
This commit is contained in:
Abseil Team
2026-02-25 10:47:12 -08:00
committed by Copybara-Service
parent 296234cd9f
commit b6808e6f7c
9 changed files with 23 additions and 580 deletions
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76
absl/debugging/stacktrace.cc
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@@ -47,7 +47,6 @@
#include "absl/base/config.h"
#include "absl/base/optimization.h"
#include "absl/base/port.h"
#include "absl/debugging/internal/borrowed_fixup_buffer.h"
#include "absl/debugging/internal/stacktrace_config.h"
#if defined(ABSL_STACKTRACE_INL_HEADER)
@@ -92,19 +91,6 @@ ABSL_ATTRIBUTE_ALWAYS_INLINE inline int Unwind(void** result, uintptr_t* frames,
}
#endif
// Some implementations of FixUpStack may need to be passed frame
// information from Unwind, even if the caller doesn't need that
// information. We allocate the necessary buffers for such implementations
// here.
const internal_stacktrace::BorrowedFixupBuffer fixup_buffer(
unwind_with_fixup ? max_depth : 0);
if (frames == nullptr) {
frames = fixup_buffer.frames();
}
if (sizes == nullptr) {
sizes = fixup_buffer.sizes();
}
Unwinder g = custom.load(std::memory_order_acquire);
size_t size;
// Add 1 to skip count for the unwinder function itself
@@ -117,14 +103,9 @@ ABSL_ATTRIBUTE_ALWAYS_INLINE inline int Unwind(void** result, uintptr_t* frames,
std::fill(frames, frames + size, uintptr_t());
}
} else {
size = static_cast<size_t>(
unwind_with_fixup
? UnwindImpl<true, IS_WITH_CONTEXT>(
result, frames, sizes, static_cast<int>(max_depth),
skip_count, uc, min_dropped_frames)
: UnwindImpl<IS_STACK_FRAMES, IS_WITH_CONTEXT>(
result, frames, sizes, static_cast<int>(max_depth),
skip_count, uc, min_dropped_frames));
size = static_cast<size_t>(UnwindImpl<IS_STACK_FRAMES, IS_WITH_CONTEXT>(
result, frames, sizes, static_cast<int>(max_depth), skip_count, uc,
min_dropped_frames));
}
if (unwind_with_fixup) {
internal_stacktrace::FixUpStack(result, frames, sizes, max_depth, size);
@@ -136,24 +117,13 @@ ABSL_ATTRIBUTE_ALWAYS_INLINE inline int Unwind(void** result, uintptr_t* frames,
} // anonymous namespace
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int
internal_stacktrace::GetStackFrames(void** result, uintptr_t* frames,
int* sizes, int max_depth, int skip_count) {
return Unwind<true, false>(result, frames, sizes,
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int GetStackFrames(
void** result, int* sizes, int max_depth, int skip_count) {
return Unwind<true, false>(result, nullptr, sizes,
static_cast<size_t>(max_depth), skip_count,
nullptr, nullptr);
}
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int
internal_stacktrace::GetStackFramesWithContext(void** result, uintptr_t* frames,
int* sizes, int max_depth,
int skip_count, const void* uc,
int* min_dropped_frames) {
return Unwind<true, true>(result, frames, sizes,
static_cast<size_t>(max_depth), skip_count, uc,
min_dropped_frames);
}
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int
internal_stacktrace::GetStackTraceNoFixup(void** result, int max_depth,
int skip_count) {
@@ -162,6 +132,15 @@ internal_stacktrace::GetStackTraceNoFixup(void** result, int max_depth,
nullptr, nullptr, /*unwind_with_fixup=*/false);
}
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int
GetStackFramesWithContext(void** result, int* sizes, int max_depth,
int skip_count, const void* uc,
int* min_dropped_frames) {
return Unwind<true, true>(result, nullptr, sizes,
static_cast<size_t>(max_depth), skip_count, uc,
min_dropped_frames);
}
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int GetStackTrace(
void** result, int max_depth, int skip_count) {
return Unwind<false, false>(result, nullptr, nullptr,
@@ -181,9 +160,8 @@ void SetStackUnwinder(Unwinder w) {
custom.store(w, std::memory_order_release);
}
ABSL_ATTRIBUTE_ALWAYS_INLINE static inline int DefaultStackUnwinderImpl(
void** pcs, uintptr_t* frames, int* sizes, int depth, int skip,
const void* uc, int* min_dropped_frames) {
int DefaultStackUnwinder(void** pcs, int* sizes, int depth, int skip,
const void* uc, int* min_dropped_frames) {
skip++; // For this function
decltype(&UnwindImpl<false, false>) f;
if (sizes == nullptr) {
@@ -199,25 +177,7 @@ ABSL_ATTRIBUTE_ALWAYS_INLINE static inline int DefaultStackUnwinderImpl(
f = &UnwindImpl<true, true>;
}
}
return (*f)(pcs, frames, sizes, depth, skip, uc, min_dropped_frames);
}
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int
internal_stacktrace::DefaultStackUnwinder(void** pcs, uintptr_t* frames,
int* sizes, int depth, int skip,
const void* uc,
int* min_dropped_frames) {
int n = DefaultStackUnwinderImpl(pcs, frames, sizes, depth, skip, uc,
min_dropped_frames);
ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
return n;
}
ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int DefaultStackUnwinder(
void** pcs, int* sizes, int depth, int skip, const void* uc,
int* min_dropped_frames) {
int n = DefaultStackUnwinderImpl(pcs, nullptr, sizes, depth, skip, uc,
min_dropped_frames);
int n = (*f)(pcs, nullptr, sizes, depth, skip, uc, min_dropped_frames);
ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
return n;
}