blob: ca62db27121287bc6f56e572734f5cce26d57710 [file] [log] [blame]
// Copyright 2019 The Crashpad Authors. All rights reserved.
//
// 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 "util/linux/proc_task_reader.h"
#include <stdio.h>
#include "base/cxx17_backports.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "util/file/directory_reader.h"
#include "util/misc/as_underlying_type.h"
namespace crashpad {
bool ReadThreadIDs(pid_t pid, std::vector<pid_t>* tids) {
DCHECK(tids->empty());
char path[32];
snprintf(path, base::size(path), "/proc/%d/task", pid);
DirectoryReader reader;
if (!reader.Open(base::FilePath(path))) {
return false;
}
std::vector<pid_t> local_tids;
base::FilePath tid_str;
DirectoryReader::Result result;
while ((result = reader.NextFile(&tid_str)) ==
DirectoryReader::Result::kSuccess) {
pid_t tid;
if (!base::StringToInt(tid_str.value(), &tid)) {
LOG(ERROR) << "format error";
continue;
}
local_tids.push_back(tid);
}
DCHECK_EQ(AsUnderlyingType(result),
AsUnderlyingType(DirectoryReader::Result::kNoMoreFiles));
DCHECK(!local_tids.empty());
tids->swap(local_tids);
return true;
}
} // namespace crashpad