| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <errno.h> |
| #include <spawn.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| |
| #include <android-base/file.h> |
| #include <android-base/stringprintf.h> |
| #include <benchmark/benchmark.h> |
| |
| static std::string test_program(const char* name) { |
| #if defined(__LP64__) |
| return android::base::GetExecutableDirectory() + "/" + name + "64"; |
| #else |
| return android::base::GetExecutableDirectory() + "/" + name + "32"; |
| #endif |
| } |
| |
| extern char** environ; |
| |
| static void BM_spawn_test(benchmark::State& state, const char* const* argv) { |
| for (auto _ : state) { |
| pid_t child = 0; |
| if (int spawn_err = posix_spawn(&child, argv[0], nullptr, nullptr, const_cast<char**>(argv), |
| environ)) { |
| state.SkipWithError(android::base::StringPrintf( |
| "posix_spawn of %s failed: %s", argv[0], strerror(spawn_err)).c_str()); |
| break; |
| } |
| |
| int wstatus = 0; |
| const pid_t wait_result = TEMP_FAILURE_RETRY(waitpid(child, &wstatus, 0)); |
| if (wait_result != child) { |
| state.SkipWithError(android::base::StringPrintf( |
| "waitpid on pid %d for %s failed: %s", |
| static_cast<int>(child), argv[0], strerror(errno)).c_str()); |
| break; |
| } |
| if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 127) { |
| state.SkipWithError(android::base::StringPrintf("could not exec %s", argv[0]).c_str()); |
| break; |
| } |
| } |
| } |
| |
| #define SPAWN_BENCHMARK(name, ...) \ |
| BENCHMARK_CAPTURE(BM_spawn_test, name, (const char*[]) { __VA_ARGS__, nullptr }) \ |
| ->UseRealTime() \ |
| ->Unit(benchmark::kMicrosecond) \ |
| |
| SPAWN_BENCHMARK(noop, test_program("bench_noop").c_str()); |
| SPAWN_BENCHMARK(noop_nostl, test_program("bench_noop_nostl").c_str()); |
| SPAWN_BENCHMARK(noop_static, test_program("bench_noop_static").c_str()); |
| |
| // Android has a /bin -> /system/bin symlink, but use /system/bin explicitly so we can more easily |
| // compare Bionic-vs-glibc on a Linux desktop machine. |
| #if defined(__GLIBC__) |
| |
| SPAWN_BENCHMARK(bin_true, "/bin/true"); |
| SPAWN_BENCHMARK(sh_true, "/bin/sh", "-c", "true"); |
| |
| #elif defined(__ANDROID__) |
| |
| SPAWN_BENCHMARK(system_bin_true, "/system/bin/true"); |
| SPAWN_BENCHMARK(vendor_bin_true, "/vendor/bin/true"); |
| SPAWN_BENCHMARK(system_sh_true, "/system/bin/sh", "-c", "true"); |
| SPAWN_BENCHMARK(vendor_sh_true, "/vendor/bin/sh", "-c", "true"); |
| |
| #endif |
| |
| BENCHMARK_MAIN(); |