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/*
* Copyright (C) 2012 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 "common_art_test.h"
#include <dirent.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <ftw.h>
#include <libgen.h>
#include <stdlib.h>
#include <unistd.h>
#include <cstdio>
#include <filesystem>
#include "android-base/file.h"
#include "android-base/logging.h"
#include "android-base/process.h"
#include "android-base/stringprintf.h"
#include "android-base/strings.h"
#include "android-base/unique_fd.h"
#include "art_field-inl.h"
#include "base/file_utils.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/mem_map.h"
#include "base/mutex.h"
#include "base/os.h"
#include "base/runtime_debug.h"
#include "base/stl_util.h"
#include "base/string_view_cpp20.h"
#include "base/unix_file/fd_file.h"
#include "dex/art_dex_file_loader.h"
#include "dex/dex_file-inl.h"
#include "dex/dex_file_loader.h"
#include "dex/primitive.h"
#include "gtest/gtest.h"
#include "nativehelper/scoped_local_ref.h"
namespace art {
using android::base::StringPrintf;
ScratchDir::ScratchDir(bool keep_files) : keep_files_(keep_files) {
// ANDROID_DATA needs to be set
CHECK_NE(static_cast<char*>(nullptr), getenv("ANDROID_DATA")) <<
"Are you subclassing RuntimeTest?";
path_ = getenv("ANDROID_DATA");
path_ += "/tmp-XXXXXX";
bool ok = (mkdtemp(&path_[0]) != nullptr);
CHECK(ok) << strerror(errno) << " for " << path_;
path_ += "/";
}
ScratchDir::~ScratchDir() {
if (!keep_files_) {
// Recursively delete the directory and all its content.
nftw(path_.c_str(), [](const char* name, const struct stat*, int type, struct FTW *) {
if (type == FTW_F) {
unlink(name);
} else if (type == FTW_DP) {
rmdir(name);
}
return 0;
}, 256 /* max open file descriptors */, FTW_DEPTH);
}
}
ScratchFile::ScratchFile() {
// ANDROID_DATA needs to be set
CHECK_NE(static_cast<char*>(nullptr), getenv("ANDROID_DATA")) <<
"Are you subclassing RuntimeTest?";
filename_ = getenv("ANDROID_DATA");
filename_ += "/TmpFile-XXXXXX";
int fd = mkstemp(&filename_[0]);
CHECK_NE(-1, fd) << strerror(errno) << " for " << filename_;
file_.reset(new File(fd, GetFilename(), true));
}
ScratchFile::ScratchFile(const ScratchFile& other, const char* suffix)
: ScratchFile(other.GetFilename() + suffix) {}
ScratchFile::ScratchFile(const std::string& filename) : filename_(filename) {
int fd = open(filename_.c_str(), O_RDWR | O_CREAT | O_CLOEXEC, 0666);
CHECK_NE(-1, fd);
file_.reset(new File(fd, GetFilename(), true));
}
ScratchFile::ScratchFile(File* file) {
CHECK(file != nullptr);
filename_ = file->GetPath();
file_.reset(file);
}
ScratchFile::ScratchFile(ScratchFile&& other) noexcept {
*this = std::move(other);
}
ScratchFile& ScratchFile::operator=(ScratchFile&& other) noexcept {
if (GetFile() != other.GetFile()) {
std::swap(filename_, other.filename_);
std::swap(file_, other.file_);
}
return *this;
}
ScratchFile::~ScratchFile() {
Unlink();
}
int ScratchFile::GetFd() const {
return file_->Fd();
}
void ScratchFile::Close() {
if (file_ != nullptr) {
if (file_->FlushCloseOrErase() != 0) {
PLOG(WARNING) << "Error closing scratch file.";
}
file_.reset();
}
}
void ScratchFile::Unlink() {
if (!OS::FileExists(filename_.c_str())) {
return;
}
Close();
int unlink_result = unlink(filename_.c_str());
CHECK_EQ(0, unlink_result);
}
std::string CommonArtTestImpl::GetAndroidBuildTop() {
CHECK(IsHost());
std::string android_build_top;
// Look at how we were invoked to find the expected directory.
std::string argv;
if (android::base::ReadFileToString("/proc/self/cmdline", &argv)) {
// /proc/self/cmdline is the programs 'argv' with elements delimited by '\0'.
std::filesystem::path path(argv.substr(0, argv.find('\0')));
path = std::filesystem::absolute(path);
// Walk up until we find the one of the well-known directories.
for (; path.parent_path() != path; path = path.parent_path()) {
// We are running tests from out/host/linux-x86 on developer machine.
if (path.filename() == std::filesystem::path("linux-x86")) {
android_build_top = path.parent_path().parent_path().parent_path();
break;
}
// We are running tests from testcases (extracted from zip) on tradefed.
// The first path is for remote runs and the second path for local runs.
if (path.filename() == std::filesystem::path("testcases") ||
StartsWith(path.filename().string(), "host_testcases")) {
android_build_top = path.append("art_common");
break;
}
}
}
CHECK(!android_build_top.empty());
// Check that the expected directory matches the environment variable.
const char* android_build_top_from_env = getenv("ANDROID_BUILD_TOP");
android_build_top = std::filesystem::path(android_build_top).string();
CHECK(!android_build_top.empty());
if (android_build_top_from_env != nullptr) {
if (std::filesystem::weakly_canonical(android_build_top).string() !=
std::filesystem::weakly_canonical(android_build_top_from_env).string()) {
LOG(WARNING) << "Execution path (" << argv << ") not below ANDROID_BUILD_TOP ("
<< android_build_top_from_env << ")! Using env-var.";
android_build_top = android_build_top_from_env;
}
} else {
setenv("ANDROID_BUILD_TOP", android_build_top.c_str(), /*overwrite=*/0);
}
if (android_build_top.back() != '/') {
android_build_top += '/';
}
return android_build_top;
}
std::string CommonArtTestImpl::GetAndroidHostOut() {
CHECK(IsHost());
// Check that the expected directory matches the environment variable.
// ANDROID_HOST_OUT is set by envsetup or unset and is the full path to host binaries/libs
const char* android_host_out_from_env = getenv("ANDROID_HOST_OUT");
// OUT_DIR is a user-settable ENV_VAR that controls where soong puts build artifacts. It can
// either be relative to ANDROID_BUILD_TOP or a concrete path.
const char* android_out_dir = getenv("OUT_DIR");
// Take account of OUT_DIR setting.
if (android_out_dir == nullptr) {
android_out_dir = "out";
}
std::string android_host_out;
if (android_out_dir[0] == '/') {
android_host_out = (std::filesystem::path(android_out_dir) / "host" / "linux-x86").string();
} else {
android_host_out =
(std::filesystem::path(GetAndroidBuildTop()) / android_out_dir / "host" / "linux-x86")
.string();
}
std::filesystem::path expected(android_host_out);
if (android_host_out_from_env != nullptr) {
std::filesystem::path from_env(std::filesystem::weakly_canonical(android_host_out_from_env));
if (std::filesystem::weakly_canonical(expected).string() != from_env.string()) {
LOG(WARNING) << "Execution path (" << expected << ") not below ANDROID_HOST_OUT ("
<< from_env << ")! Using env-var.";
expected = from_env;
}
} else {
setenv("ANDROID_HOST_OUT", android_host_out.c_str(), /*overwrite=*/0);
}
return expected.string();
}
void CommonArtTestImpl::SetUpAndroidRootEnvVars() {
if (IsHost()) {
std::string android_host_out = GetAndroidHostOut();
// Environment variable ANDROID_ROOT is set on the device, but not
// necessarily on the host.
const char* android_root_from_env = getenv("ANDROID_ROOT");
if (android_root_from_env == nullptr) {
// Use ANDROID_HOST_OUT for ANDROID_ROOT.
setenv("ANDROID_ROOT", android_host_out.c_str(), 1);
android_root_from_env = getenv("ANDROID_ROOT");
}
// Environment variable ANDROID_I18N_ROOT is set on the device, but not
// necessarily on the host. It needs to be set so that various libraries
// like libcore / icu4j / icu4c can find their data files.
const char* android_i18n_root_from_env = getenv("ANDROID_I18N_ROOT");
if (android_i18n_root_from_env == nullptr) {
// Use ${ANDROID_I18N_OUT}/com.android.i18n for ANDROID_I18N_ROOT.
std::string android_i18n_root = android_host_out.c_str();
android_i18n_root += "/com.android.i18n";
setenv("ANDROID_I18N_ROOT", android_i18n_root.c_str(), 1);
}
// Environment variable ANDROID_ART_ROOT is set on the device, but not
// necessarily on the host. It needs to be set so that various libraries
// like libcore / icu4j / icu4c can find their data files.
const char* android_art_root_from_env = getenv("ANDROID_ART_ROOT");
if (android_art_root_from_env == nullptr) {
// Use ${ANDROID_HOST_OUT}/com.android.art for ANDROID_ART_ROOT.
std::string android_art_root = android_host_out.c_str();
android_art_root += "/com.android.art";
setenv("ANDROID_ART_ROOT", android_art_root.c_str(), 1);
}
// Environment variable ANDROID_TZDATA_ROOT is set on the device, but not
// necessarily on the host. It needs to be set so that various libraries
// like libcore / icu4j / icu4c can find their data files.
const char* android_tzdata_root_from_env = getenv("ANDROID_TZDATA_ROOT");
if (android_tzdata_root_from_env == nullptr) {
// Use ${ANDROID_HOST_OUT}/com.android.tzdata for ANDROID_TZDATA_ROOT.
std::string android_tzdata_root = android_host_out.c_str();
android_tzdata_root += "/com.android.tzdata";
setenv("ANDROID_TZDATA_ROOT", android_tzdata_root.c_str(), 1);
}
setenv("LD_LIBRARY_PATH", ":", 0); // Required by java.lang.System.<clinit>.
}
}
void CommonArtTestImpl::SetUpAndroidDataDir(std::string& android_data) {
if (IsHost()) {
const char* tmpdir = getenv("TMPDIR");
if (tmpdir != nullptr && tmpdir[0] != 0) {
android_data = tmpdir;
} else {
android_data = "/tmp";
}
} else {
// On target, we cannot use `/mnt/sdcard` because it is mounted `noexec`,
// nor `/data/dalvik-cache` as it is not accessible on `user` builds.
// Instead, use `/data/local/tmp`, which does not require any special
// permission.
android_data = "/data/local/tmp";
}
android_data += "/art-data-XXXXXX";
if (mkdtemp(&android_data[0]) == nullptr) {
PLOG(FATAL) << "mkdtemp(\"" << &android_data[0] << "\") failed";
}
setenv("ANDROID_DATA", android_data.c_str(), 1);
}
void CommonArtTestImpl::SetUp() {
// Some tests clear these and when running with --no_isolate this can cause
// later tests to fail
Locks::Init();
MemMap::Init();
SetUpAndroidRootEnvVars();
SetUpAndroidDataDir(android_data_);
// Re-use the data temporary directory for /system_ext tests
android_system_ext_.append(android_data_.c_str());
android_system_ext_.append("/system_ext");
int mkdir_result = mkdir(android_system_ext_.c_str(), 0700);
ASSERT_EQ(mkdir_result, 0);
setenv("ANDROID_SYSTEM_EXT", android_system_ext_.c_str(), 1);
std::string system_ext_framework = android_system_ext_ + "/framework";
mkdir_result = mkdir(system_ext_framework.c_str(), 0700);
ASSERT_EQ(mkdir_result, 0);
dalvik_cache_.append(android_data_.c_str());
dalvik_cache_.append("/dalvik-cache");
mkdir_result = mkdir(dalvik_cache_.c_str(), 0700);
ASSERT_EQ(mkdir_result, 0);
if (kIsDebugBuild) {
static bool gSlowDebugTestFlag = false;
RegisterRuntimeDebugFlag(&gSlowDebugTestFlag);
SetRuntimeDebugFlagsEnabled(true);
CHECK(gSlowDebugTestFlag);
}
}
void CommonArtTestImpl::TearDownAndroidDataDir(const std::string& android_data,
bool fail_on_error) {
if (fail_on_error) {
ASSERT_EQ(rmdir(android_data.c_str()), 0);
} else {
rmdir(android_data.c_str());
}
}
// Get prebuilt binary tool.
// The paths need to be updated when Android prebuilts update.
std::string CommonArtTestImpl::GetAndroidTool(const char* name, InstructionSet) {
#ifndef ART_CLANG_PATH
UNUSED(name);
LOG(FATAL) << "There are no prebuilt tools available.";
UNREACHABLE();
#else
std::string path = GetAndroidBuildTop() + ART_CLANG_PATH + "/bin/";
CHECK(OS::DirectoryExists(path.c_str())) << path;
path += name;
CHECK(OS::FileExists(path.c_str())) << path;
return path;
#endif
}
std::string CommonArtTestImpl::GetCoreArtLocation() {
return GetCoreFileLocation("art");
}
std::string CommonArtTestImpl::GetCoreOatLocation() {
return GetCoreFileLocation("oat");
}
std::unique_ptr<const DexFile> CommonArtTestImpl::LoadExpectSingleDexFile(const char* location) {
std::vector<std::unique_ptr<const DexFile>> dex_files;
std::string error_msg;
MemMap::Init();
static constexpr bool kVerifyChecksum = true;
const ArtDexFileLoader dex_file_loader;
std::string filename(IsHost() ? GetAndroidBuildTop() + location : location);
if (!dex_file_loader.Open(filename.c_str(),
std::string(location),
/* verify= */ true,
kVerifyChecksum,
&error_msg,
&dex_files)) {
LOG(FATAL) << "Could not open .dex file '" << filename << "': " << error_msg << "\n";
UNREACHABLE();
}
CHECK_EQ(1U, dex_files.size()) << "Expected only one dex file in " << filename;
return std::move(dex_files[0]);
}
void CommonArtTestImpl::ClearDirectory(const char* dirpath, bool recursive) {
ASSERT_TRUE(dirpath != nullptr);
DIR* dir = opendir(dirpath);
ASSERT_TRUE(dir != nullptr);
dirent* e;
struct stat s;
while ((e = readdir(dir)) != nullptr) {
if ((strcmp(e->d_name, ".") == 0) || (strcmp(e->d_name, "..") == 0)) {
continue;
}
std::string filename(dirpath);
filename.push_back('/');
filename.append(e->d_name);
int stat_result = lstat(filename.c_str(), &s);
ASSERT_EQ(0, stat_result) << "unable to stat " << filename;
if (S_ISDIR(s.st_mode)) {
if (recursive) {
ClearDirectory(filename.c_str());
int rmdir_result = rmdir(filename.c_str());
ASSERT_EQ(0, rmdir_result) << filename;
}
} else {
int unlink_result = unlink(filename.c_str());
ASSERT_EQ(0, unlink_result) << filename;
}
}
closedir(dir);
}
void CommonArtTestImpl::TearDown() {
const char* android_data = getenv("ANDROID_DATA");
ASSERT_TRUE(android_data != nullptr);
ClearDirectory(dalvik_cache_.c_str());
int rmdir_cache_result = rmdir(dalvik_cache_.c_str());
ASSERT_EQ(0, rmdir_cache_result);
ClearDirectory(android_system_ext_.c_str(), true);
rmdir_cache_result = rmdir(android_system_ext_.c_str());
ASSERT_EQ(0, rmdir_cache_result);
TearDownAndroidDataDir(android_data_, true);
dalvik_cache_.clear();
android_system_ext_.clear();
}
static std::string GetDexFileName(const std::string& jar_prefix, bool host) {
std::string prefix(host ? GetAndroidRoot() : "");
const char* apexPath = (jar_prefix == "conscrypt") ? kAndroidConscryptApexDefaultPath
: (jar_prefix == "core-icu4j" ? kAndroidI18nApexDefaultPath
: kAndroidArtApexDefaultPath);
return StringPrintf("%s%s/javalib/%s.jar", prefix.c_str(), apexPath, jar_prefix.c_str());
}
std::vector<std::string> CommonArtTestImpl::GetLibCoreModuleNames() const {
// Note: This must start with the CORE_IMG_JARS in Android.common_path.mk
// because that's what we use for compiling the boot.art image.
// It may contain additional modules from TEST_CORE_JARS.
return {
// CORE_IMG_JARS modules.
"core-oj",
"core-libart",
"okhttp",
"bouncycastle",
"apache-xml",
// Additional modules.
"core-icu4j",
"conscrypt",
};
}
std::vector<std::string> CommonArtTestImpl::GetLibCoreDexFileNames(
const std::vector<std::string>& modules) const {
std::vector<std::string> result;
result.reserve(modules.size());
for (const std::string& module : modules) {
result.push_back(GetDexFileName(module, IsHost()));
}
return result;
}
std::vector<std::string> CommonArtTestImpl::GetLibCoreDexFileNames() const {
std::vector<std::string> modules = GetLibCoreModuleNames();
return GetLibCoreDexFileNames(modules);
}
std::vector<std::string> CommonArtTestImpl::GetLibCoreDexLocations(
const std::vector<std::string>& modules) const {
std::vector<std::string> result = GetLibCoreDexFileNames(modules);
if (IsHost()) {
// Strip the ANDROID_BUILD_TOP directory including the directory separator '/'.
std::string prefix = GetAndroidBuildTop();
for (std::string& location : result) {
CHECK_GT(location.size(), prefix.size());
CHECK_EQ(location.compare(0u, prefix.size(), prefix), 0)
<< " prefix=" << prefix << " location=" << location;
location.erase(0u, prefix.size());
}
}
return result;
}
std::vector<std::string> CommonArtTestImpl::GetLibCoreDexLocations() const {
std::vector<std::string> modules = GetLibCoreModuleNames();
return GetLibCoreDexLocations(modules);
}
std::string CommonArtTestImpl::GetClassPathOption(const char* option,
const std::vector<std::string>& class_path) {
return option + android::base::Join(class_path, ':');
}
// Check that for target builds we have ART_TARGET_NATIVETEST_DIR set.
#ifdef ART_TARGET
#ifndef ART_TARGET_NATIVETEST_DIR
#error "ART_TARGET_NATIVETEST_DIR not set."
#endif
// Wrap it as a string literal.
#define ART_TARGET_NATIVETEST_DIR_STRING STRINGIFY(ART_TARGET_NATIVETEST_DIR) "/"
#else
#define ART_TARGET_NATIVETEST_DIR_STRING ""
#endif
std::string CommonArtTestImpl::GetTestDexFileName(const char* name) const {
CHECK(name != nullptr);
// The needed jar files for gtest are located next to the gtest binary itself.
std::string cmdline;
bool result = android::base::ReadFileToString("/proc/self/cmdline", &cmdline);
CHECK(result);
UniqueCPtr<char[]> executable_path(realpath(cmdline.c_str(), nullptr));
CHECK(executable_path != nullptr);
std::string executable_dir = dirname(executable_path.get());
for (auto ext : {".jar", ".dex"}) {
std::string path = executable_dir + "/art-gtest-jars-" + name + ext;
if (OS::FileExists(path.c_str())) {
return path;
}
}
LOG(FATAL) << "Test file " << name << " not found";
UNREACHABLE();
}
std::vector<std::unique_ptr<const DexFile>> CommonArtTestImpl::OpenDexFiles(const char* filename) {
static constexpr bool kVerify = true;
static constexpr bool kVerifyChecksum = true;
std::string error_msg;
const ArtDexFileLoader dex_file_loader;
std::vector<std::unique_ptr<const DexFile>> dex_files;
bool success = dex_file_loader.Open(filename,
filename,
kVerify,
kVerifyChecksum,
&error_msg,
&dex_files);
CHECK(success) << "Failed to open '" << filename << "': " << error_msg;
for (auto& dex_file : dex_files) {
CHECK_EQ(PROT_READ, dex_file->GetPermissions());
CHECK(dex_file->IsReadOnly());
}
return dex_files;
}
std::unique_ptr<const DexFile> CommonArtTestImpl::OpenDexFile(const char* filename) {
std::vector<std::unique_ptr<const DexFile>> dex_files(OpenDexFiles(filename));
CHECK_EQ(dex_files.size(), 1u) << "Expected only one dex file";
return std::move(dex_files[0]);
}
std::vector<std::unique_ptr<const DexFile>> CommonArtTestImpl::OpenTestDexFiles(
const char* name) {
return OpenDexFiles(GetTestDexFileName(name).c_str());
}
std::unique_ptr<const DexFile> CommonArtTestImpl::OpenTestDexFile(const char* name) {
return OpenDexFile(GetTestDexFileName(name).c_str());
}
std::string CommonArtTestImpl::GetImageDirectory() {
if (IsHost()) {
const char* host_dir = getenv("ANDROID_HOST_OUT");
CHECK(host_dir != nullptr);
return std::string(host_dir) + "/apex/art_boot_images/javalib";
}
return GetPrebuiltPrimaryBootImageDir();
}
std::string CommonArtTestImpl::GetCoreFileLocation(const char* suffix) {
CHECK(suffix != nullptr);
return GetImageDirectory() + "/boot." + suffix;
}
std::string CommonArtTestImpl::CreateClassPath(
const std::vector<std::unique_ptr<const DexFile>>& dex_files) {
CHECK(!dex_files.empty());
std::string classpath = dex_files[0]->GetLocation();
for (size_t i = 1; i < dex_files.size(); i++) {
classpath += ":" + dex_files[i]->GetLocation();
}
return classpath;
}
std::string CommonArtTestImpl::CreateClassPathWithChecksums(
const std::vector<std::unique_ptr<const DexFile>>& dex_files) {
CHECK(!dex_files.empty());
std::string classpath = dex_files[0]->GetLocation() + "*" +
std::to_string(dex_files[0]->GetLocationChecksum());
for (size_t i = 1; i < dex_files.size(); i++) {
classpath += ":" + dex_files[i]->GetLocation() + "*" +
std::to_string(dex_files[i]->GetLocationChecksum());
}
return classpath;
}
CommonArtTestImpl::ForkAndExecResult CommonArtTestImpl::ForkAndExec(
const std::vector<std::string>& argv,
const PostForkFn& post_fork,
const OutputHandlerFn& handler) {
ForkAndExecResult result;
result.status_code = 0;
result.stage = ForkAndExecResult::kLink;
std::vector<const char*> c_args;
for (const std::string& str : argv) {
c_args.push_back(str.c_str());
}
c_args.push_back(nullptr);
android::base::unique_fd link[2];
{
int link_fd[2];
if (pipe(link_fd) == -1) {
return result;
}
link[0].reset(link_fd[0]);
link[1].reset(link_fd[1]);
}
result.stage = ForkAndExecResult::kFork;
pid_t pid = fork();
if (pid == -1) {
return result;
}
if (pid == 0) {
if (!post_fork()) {
LOG(ERROR) << "Failed post-fork function";
exit(1);
UNREACHABLE();
}
// Redirect stdout and stderr.
dup2(link[1].get(), STDOUT_FILENO);
dup2(link[1].get(), STDERR_FILENO);
link[0].reset();
link[1].reset();
execv(c_args[0], const_cast<char* const*>(c_args.data()));
exit(1);
UNREACHABLE();
}
result.stage = ForkAndExecResult::kWaitpid;
link[1].reset();
char buffer[128] = { 0 };
ssize_t bytes_read = 0;
while (TEMP_FAILURE_RETRY(bytes_read = read(link[0].get(), buffer, 128)) > 0) {
handler(buffer, bytes_read);
}
handler(buffer, 0u); // End with a virtual write of zero length to simplify clients.
link[0].reset();
if (waitpid(pid, &result.status_code, 0) == -1) {
return result;
}
result.stage = ForkAndExecResult::kFinished;
return result;
}
CommonArtTestImpl::ForkAndExecResult CommonArtTestImpl::ForkAndExec(
const std::vector<std::string>& argv, const PostForkFn& post_fork, std::string* output) {
auto string_collect_fn = [output](char* buf, size_t len) {
*output += std::string(buf, len);
};
return ForkAndExec(argv, post_fork, string_collect_fn);
}
std::vector<pid_t> GetPidByName(const std::string& process_name) {
std::vector<pid_t> results;
for (pid_t pid : android::base::AllPids{}) {
std::string cmdline;
if (!android::base::ReadFileToString(StringPrintf("/proc/%d/cmdline", pid), &cmdline)) {
continue;
}
// Take the first argument.
size_t pos = cmdline.find('\0');
if (pos != std::string::npos) {
cmdline.resize(pos);
}
if (cmdline == process_name) {
results.push_back(pid);
}
}
return results;
}
} // namespace art