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Use non-stack storage for stack trace buffers

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Doing this opportunistically allows us to avoid performance overhead in the vast majority of calls (rare, non-reentrant ones) while simultaneously minimizing stack space usage.

PiperOrigin-RevId: 831560881
Change-Id: Idc6ba1dd0dcf1b4aaf3ee7cf468054bcfdcf90af
This commit is contained in:
Abseil Team
2025-11-12 15:22:53 -08:00
committed by Copybara-Service
parent e6a6acdca4
commit 03cc841ff0
8 changed files with 402 additions and 74 deletions
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25
absl/debugging/stacktrace_benchmark.cc
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@@ -12,12 +12,25 @@
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stddef.h>
#include <stdint.h>
#include "absl/base/attributes.h"
#include "absl/base/config.h"
#include "absl/base/optimization.h"
#include "absl/cleanup/cleanup.h"
#include "absl/debugging/stacktrace.h"
#include "benchmark/benchmark.h"
static bool g_enable_fixup = false;
#if ABSL_HAVE_ATTRIBUTE_WEAK
// Override these weak symbols if possible.
bool absl::internal_stacktrace::ShouldFixUpStack() { return g_enable_fixup; }
void absl::internal_stacktrace::FixUpStack(void**, uintptr_t*, int*, size_t,
size_t&) {}
#endif
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace {
@@ -42,14 +55,24 @@ ABSL_ATTRIBUTE_NOINLINE void func(benchmark::State& state, int x, int depth) {
func(state, --x, depth);
}
template <bool EnableFixup>
void BM_GetStackTrace(benchmark::State& state) {
const Cleanup restore_state(
[prev = g_enable_fixup]() { g_enable_fixup = prev; });
g_enable_fixup = EnableFixup;
int depth = state.range(0);
for (auto s : state) {
func(state, depth, depth);
}
}
BENCHMARK(BM_GetStackTrace)->DenseRange(10, kMaxStackDepth, 10);
#if ABSL_HAVE_ATTRIBUTE_WEAK
auto& BM_GetStackTraceWithFixup = BM_GetStackTrace<true>;
BENCHMARK(BM_GetStackTraceWithFixup)->DenseRange(10, kMaxStackDepth, 10);
#endif
auto& BM_GetStackTraceWithoutFixup = BM_GetStackTrace<false>;
BENCHMARK(BM_GetStackTraceWithoutFixup)->DenseRange(10, kMaxStackDepth, 10);
} // namespace
ABSL_NAMESPACE_END
} // namespace absl