84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <signal.h>
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#include <stdint.h>
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#include <atomic>
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#include <thread>
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#include <android-base/threads.h>
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#include <benchmark/benchmark.h>
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#include <unwindstack/Memory.h>
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#include <unwindstack/Unwinder.h>
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constexpr size_t kMaxFrames = 32;
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void ThreadCall6(std::atomic_int* tid, std::atomic_bool* done) {
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tid->store(android::base::GetThreadId());
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while (!done->load()) {
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}
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}
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void ThreadCall5(std::atomic_int* tid, std::atomic_bool* done) {
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ThreadCall6(tid, done);
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}
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void ThreadCall4(std::atomic_int* tid, std::atomic_bool* done) {
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ThreadCall5(tid, done);
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}
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void ThreadCall3(std::atomic_int* tid, std::atomic_bool* done) {
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ThreadCall4(tid, done);
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}
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void ThreadCall2(std::atomic_int* tid, std::atomic_bool* done) {
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ThreadCall3(tid, done);
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}
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void ThreadCall1(std::atomic_int* tid, std::atomic_bool* done) {
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ThreadCall2(tid, done);
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}
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static void BM_thread_unwind(benchmark::State& state) {
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std::atomic_int tid(0);
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std::atomic_bool done;
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// Create the thread before the unwinder object so all maps are no
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// longer changing.
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std::thread thread([&tid, &done] { ThreadCall1(&tid, &done); });
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while (tid.load() == 0) {
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}
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unwindstack::ThreadUnwinder unwinder(kMaxFrames);
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if (!unwinder.Init()) {
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state.SkipWithError("Failed to init.");
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}
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for (auto _ : state) {
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unwinder.UnwindWithSignal(SIGRTMIN, tid.load());
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if (unwinder.NumFrames() < 5) {
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state.SkipWithError("Failed to unwind.");
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}
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}
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done.store(true);
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thread.join();
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}
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BENCHMARK(BM_thread_unwind);
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