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/*
* Copyright (C) 2020 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 <err.h>
#include <malloc.h>
#include <stdint.h>
#include <string>
#include <benchmark/benchmark.h>
#include <unwindstack/Elf.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
#include "Utils.h"
class ElfCreateBenchmark : public benchmark::Fixture {
public:
void RunBenchmark(benchmark::State& state, const std::string& elf_file) {
MemoryTracker mem_tracker;
for (const auto& _ : state) {
state.PauseTiming();
mem_tracker.StartTrackingAllocations();
auto file_memory = unwindstack::Memory::CreateFileMemory(elf_file, 0);
state.ResumeTiming();
unwindstack::Elf elf(file_memory);
if (!elf.Init() || !elf.valid()) {
errx(1, "Internal Error: Cannot open elf: %s", elf_file.c_str());
}
state.PauseTiming();
mem_tracker.StopTrackingAllocations();
state.ResumeTiming();
}
mem_tracker.SetBenchmarkCounters(state);
}
};
BENCHMARK_F(ElfCreateBenchmark, BM_elf_create)(benchmark::State& state) {
RunBenchmark(state, GetElfFile());
}
BENCHMARK_F(ElfCreateBenchmark, BM_elf_create_large_compressed)(benchmark::State& state) {
RunBenchmark(state, GetLargeCompressedFrameElfFile());
}
BENCHMARK_F(ElfCreateBenchmark, BM_elf_create_large_eh_frame)(benchmark::State& state) {
RunBenchmark(state, GetLargeEhFrameElfFile());
}
static void InitializeBuildId(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_elf_get_build_id_from_object(benchmark::State& state) {
unwindstack::LocalMaps maps;
unwindstack::MapInfo* build_id_map_info;
InitializeBuildId(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 (const auto& _ : state) {
state.PauseTiming();
unwindstack::SharedString* id = build_id_map_info->build_id();
if (id != nullptr) {
delete id;
build_id_map_info->set_build_id(nullptr);
}
state.ResumeTiming();
benchmark::DoNotOptimize(build_id_map_info->GetBuildID());
}
}
BENCHMARK(BM_elf_get_build_id_from_object);
static void BM_elf_get_build_id_from_file(benchmark::State& state) {
unwindstack::LocalMaps maps;
unwindstack::MapInfo* build_id_map_info;
InitializeBuildId(state, maps, &build_id_map_info);
for (const auto& _ : state) {
state.PauseTiming();
unwindstack::SharedString* id = build_id_map_info->build_id();
if (id != nullptr) {
delete id;
build_id_map_info->set_build_id(nullptr);
}
state.ResumeTiming();
benchmark::DoNotOptimize(build_id_map_info->GetBuildID());
}
}
BENCHMARK(BM_elf_get_build_id_from_file);
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