1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef SRC_PROFILING_MEMORY_PROC_UTILS_H_
18 #define SRC_PROFILING_MEMORY_PROC_UTILS_H_
19
20 #include <sys/types.h>
21 #include <set>
22 #include <vector>
23
24 #include "perfetto/base/scoped_file.h"
25
26 namespace perfetto {
27 namespace profiling {
28
29 template <typename Fn>
ForEachPid(Fn callback)30 void ForEachPid(Fn callback) {
31 base::ScopedDir proc_dir(opendir("/proc"));
32 if (!proc_dir) {
33 PERFETTO_DFATAL("Failed to open /proc");
34 return;
35 }
36 struct dirent* entry;
37 while ((entry = readdir(*proc_dir))) {
38 char* end;
39 long int pid = strtol(entry->d_name, &end, 10);
40 if (*end != '\0')
41 continue;
42 callback(static_cast<pid_t>(pid));
43 }
44 }
45
46 bool NormalizeCmdLine(char* cmdline, size_t size, std::string* name);
47 std::vector<std::string> NormalizeCmdlines(
48 const std::vector<std::string>& cmdlines);
49
50 void FindAllProfilablePids(std::set<pid_t>* pids);
51 void FindPidsForCmdlines(const std::vector<std::string>& cmdlines,
52 std::set<pid_t>* pids);
53 bool GetCmdlineForPID(pid_t pid, std::string* name);
54
55 } // namespace profiling
56 } // namespace perfetto
57
58 #endif // SRC_PROFILING_MEMORY_PROC_UTILS_H_
59