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/*
* Copyright (C) 2018 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.
*/
#ifndef SRC_PROFILING_COMMON_PROC_UTILS_H_
#define SRC_PROFILING_COMMON_PROC_UTILS_H_
#include <sys/types.h>
#include <set>
#include <vector>
#include "perfetto/ext/base/optional.h"
#include "perfetto/ext/base/scoped_file.h"
namespace perfetto {
namespace profiling {
template <typename Fn>
void ForEachPid(Fn callback) {
base::ScopedDir proc_dir(opendir("/proc"));
if (!proc_dir) {
PERFETTO_DFATAL_OR_ELOG("Failed to open /proc");
return;
}
struct dirent* entry;
while ((entry = readdir(*proc_dir))) {
char* end;
long int pid = strtol(entry->d_name, &end, 10);
if (*end != '\0')
continue;
callback(static_cast<pid_t>(pid));
}
}
base::Optional<std::vector<std::string>> NormalizeCmdlines(
const std::vector<std::string>& cmdlines);
void FindAllProfilablePids(std::set<pid_t>* pids);
void FindPidsForCmdlines(const std::vector<std::string>& cmdlines,
std::set<pid_t>* pids);
bool GetCmdlineForPID(pid_t pid, std::string* name);
base::Optional<std::string> ReadStatus(pid_t pid);
base::Optional<uint32_t> GetRssAnonAndSwap(const std::string&);
// Filters the list of pids (in-place), keeping only the
// entries satisfying the minimum size criteria for anonymous memory.
void RemoveUnderAnonThreshold(uint32_t min_size_kb, std::set<pid_t>* pids);
} // namespace profiling
} // namespace perfetto
#endif // SRC_PROFILING_COMMON_PROC_UTILS_H_