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/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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.
*/
#include <stdint.h>
#include <memory>
#include <benchmark/benchmark.h>
#include <android-base/strings.h>
#include <unwindstack/Elf.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
#include <unwindstack/RegsGetLocal.h>
#include <unwindstack/Unwinder.h>
size_t Call6(std::shared_ptr<unwindstack::Memory>& process_memory, unwindstack::Maps* maps) {
std::unique_ptr<unwindstack::Regs> regs(unwindstack::Regs::CreateFromLocal());
unwindstack::RegsGetLocal(regs.get());
unwindstack::Unwinder unwinder(32, maps, regs.get(), process_memory);
unwinder.Unwind();
return unwinder.NumFrames();
}
size_t Call5(std::shared_ptr<unwindstack::Memory>& process_memory, unwindstack::Maps* maps) {
return Call6(process_memory, maps);
}
size_t Call4(std::shared_ptr<unwindstack::Memory>& process_memory, unwindstack::Maps* maps) {
return Call5(process_memory, maps);
}
size_t Call3(std::shared_ptr<unwindstack::Memory>& process_memory, unwindstack::Maps* maps) {
return Call4(process_memory, maps);
}
size_t Call2(std::shared_ptr<unwindstack::Memory>& process_memory, unwindstack::Maps* maps) {
return Call3(process_memory, maps);
}
size_t Call1(std::shared_ptr<unwindstack::Memory>& process_memory, unwindstack::Maps* maps) {
return Call2(process_memory, maps);
}
static void BM_uncached_unwind(benchmark::State& state) {
auto process_memory = unwindstack::Memory::CreateProcessMemory(getpid());
unwindstack::LocalMaps maps;
if (!maps.Parse()) {
state.SkipWithError("Failed to parse local maps.");
}
for (auto _ : state) {
benchmark::DoNotOptimize(Call1(process_memory, &maps));
}
}
BENCHMARK(BM_uncached_unwind);
static void BM_cached_unwind(benchmark::State& state) {
auto process_memory = unwindstack::Memory::CreateProcessMemoryCached(getpid());
unwindstack::LocalMaps maps;
if (!maps.Parse()) {
state.SkipWithError("Failed to parse local maps.");
}
for (auto _ : state) {
benchmark::DoNotOptimize(Call1(process_memory, &maps));
}
}
BENCHMARK(BM_cached_unwind);
static void Initialize(benchmark::State& state, unwindstack::Maps& maps,
unwindstack::MapInfo** build_id_map_info) {
if (!maps.Parse()) {
state.SkipWithError("Failed to parse local maps.");
return;
}
// Find the libc.so share library and use that for benchmark purposes.
*build_id_map_info = nullptr;
for (auto& map_info : maps) {
if (map_info->offset == 0 && map_info->GetBuildID() != "") {
*build_id_map_info = map_info.get();
break;
}
}
if (*build_id_map_info == nullptr) {
state.SkipWithError("Failed to find a map with a BuildID.");
}
}
static void BM_get_build_id_from_elf(benchmark::State& state) {
unwindstack::LocalMaps maps;
unwindstack::MapInfo* build_id_map_info;
Initialize(state, maps, &build_id_map_info);
unwindstack::Elf* elf = build_id_map_info->GetElf(std::shared_ptr<unwindstack::Memory>(),
unwindstack::Regs::CurrentArch());
if (!elf->valid()) {
state.SkipWithError("Cannot get valid elf from map.");
}
for (auto _ : state) {
uintptr_t id = build_id_map_info->build_id;
if (id != 0) {
delete reinterpret_cast<std::string*>(id);
build_id_map_info->build_id = 0;
}
benchmark::DoNotOptimize(build_id_map_info->GetBuildID());
}
}
BENCHMARK(BM_get_build_id_from_elf);
static void BM_get_build_id_from_file(benchmark::State& state) {
unwindstack::LocalMaps maps;
unwindstack::MapInfo* build_id_map_info;
Initialize(state, maps, &build_id_map_info);
for (auto _ : state) {
uintptr_t id = build_id_map_info->build_id;
if (id != 0) {
delete reinterpret_cast<std::string*>(id);
build_id_map_info->build_id = 0;
}
benchmark::DoNotOptimize(build_id_map_info->GetBuildID());
}
}
BENCHMARK(BM_get_build_id_from_file);
BENCHMARK_MAIN();
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