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/*
* Copyright (C) 2021 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 <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/ptrace.h>
#include <unistd.h>
#include <memory>
#include <benchmark/benchmark.h>
#include <unwindstack/AndroidUnwinder.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
#include <unwindstack/Unwinder.h>
#include "MemoryRemote.h"
#include "PidUtils.h"
#include "tests/TestUtils.h"
static bool WaitForRemote(pid_t pid, volatile bool* ready_ptr) {
return unwindstack::WaitForPidState(pid, [pid, ready_ptr]() {
unwindstack::MemoryRemote memory(pid);
bool ready;
uint64_t ready_addr = reinterpret_cast<uint64_t>(ready_ptr);
if (memory.ReadFully(ready_addr, &ready, sizeof(ready)) && ready) {
return unwindstack::PID_RUN_PASS;
}
return unwindstack::PID_RUN_KEEP_GOING;
});
}
size_t RemoteCall6(volatile bool* ready) {
*ready = true;
while (true)
;
}
size_t RemoteCall5(volatile bool* ready) {
return RemoteCall6(ready);
}
size_t RemoteCall4(volatile bool* ready) {
return RemoteCall5(ready);
}
size_t RemoteCall3(volatile bool* ready) {
return RemoteCall4(ready);
}
size_t RemoteCall2(volatile bool* ready) {
return RemoteCall3(ready);
}
size_t RemoteCall1(volatile bool* ready) {
return RemoteCall2(ready);
}
static pid_t StartRemoteRun() {
static volatile bool ready = false;
pid_t pid;
if ((pid = fork()) == 0) {
RemoteCall1(&ready);
exit(0);
}
if (pid == -1) {
return -1;
}
if (!WaitForRemote(pid, &ready)) {
kill(pid, SIGKILL);
waitpid(pid, nullptr, 0);
return -1;
}
return pid;
}
static void RemoteUnwind(benchmark::State& state, bool cached) {
pid_t pid = StartRemoteRun();
if (pid == -1) {
state.SkipWithError("Failed to start remote process.");
}
unwindstack::TestScopedPidReaper reap(pid);
std::shared_ptr<unwindstack::Memory> process_memory;
if (cached) {
process_memory = unwindstack::Memory::CreateProcessMemoryCached(pid);
} else {
process_memory = unwindstack::Memory::CreateProcessMemory(pid);
}
unwindstack::RemoteMaps maps(pid);
if (!maps.Parse()) {
state.SkipWithError("Failed to parse maps.");
}
for (const auto& _ : state) {
std::unique_ptr<unwindstack::Regs> regs(unwindstack::Regs::RemoteGet(pid));
unwindstack::Unwinder unwinder(32, &maps, regs.get(), process_memory);
unwinder.Unwind();
if (unwinder.NumFrames() < 5) {
state.SkipWithError("Failed to unwind properly.");
}
}
ptrace(PTRACE_DETACH, pid, 0, 0);
}
static void BM_remote_unwind_uncached(benchmark::State& state) {
RemoteUnwind(state, false);
}
BENCHMARK(BM_remote_unwind_uncached);
static void BM_remote_unwind_cached(benchmark::State& state) {
RemoteUnwind(state, true);
}
BENCHMARK(BM_remote_unwind_cached);
static void RemoteAndroidUnwind(benchmark::State& state, bool cached) {
pid_t pid = StartRemoteRun();
if (pid == -1) {
state.SkipWithError("Failed to start remote process.");
}
unwindstack::TestScopedPidReaper reap(pid);
std::shared_ptr<unwindstack::Memory> process_memory;
if (cached) {
process_memory = unwindstack::Memory::CreateProcessMemoryCached(pid);
} else {
process_memory = unwindstack::Memory::CreateProcessMemory(pid);
}
unwindstack::AndroidRemoteUnwinder unwinder(pid, process_memory);
unwindstack::ErrorData error;
if (!unwinder.Initialize(error)) {
state.SkipWithError("Failed to initialize unwinder.");
}
for (const auto& _ : state) {
unwindstack::AndroidUnwinderData data;
if (!unwinder.Unwind(data) || data.frames.size() < 5) {
state.SkipWithError("Failed to unwind properly.");
}
}
ptrace(PTRACE_DETACH, pid, 0, 0);
}
static void BM_remote_android_unwind_uncached(benchmark::State& state) {
RemoteAndroidUnwind(state, true);
}
BENCHMARK(BM_remote_android_unwind_uncached);
static void BM_remote_android_unwind_cached(benchmark::State& state) {
RemoteAndroidUnwind(state, true);
}
BENCHMARK(BM_remote_android_unwind_cached);
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