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_COMMON_PROC_UTILS_H_
18 #define SRC_PROFILING_COMMON_PROC_UTILS_H_
19
20 #include <inttypes.h>
21 #include <sys/types.h>
22
23 #include <set>
24 #include <vector>
25
26 #include "perfetto/ext/base/optional.h"
27 #include "perfetto/ext/base/scoped_file.h"
28
29 namespace perfetto {
30 namespace profiling {
31
32 struct Uids {
33 uint64_t real;
34 uint64_t effective;
35 uint64_t saved_set;
36 uint64_t filesystem;
37 };
38
39 template <typename Fn>
ForEachPid(Fn callback)40 void ForEachPid(Fn callback) {
41 base::ScopedDir proc_dir(opendir("/proc"));
42 if (!proc_dir) {
43 PERFETTO_DFATAL_OR_ELOG("Failed to open /proc");
44 return;
45 }
46 struct dirent* entry;
47 while ((entry = readdir(*proc_dir))) {
48 char* end;
49 long int pid = strtol(entry->d_name, &end, 10);
50 if (*end != '\0')
51 continue;
52 callback(static_cast<pid_t>(pid));
53 }
54 }
55
56 base::Optional<std::vector<std::string>> NormalizeCmdlines(
57 const std::vector<std::string>& cmdlines);
58
59 void FindAllProfilablePids(std::set<pid_t>* pids);
60 void FindPidsForCmdlines(const std::vector<std::string>& cmdlines,
61 std::set<pid_t>* pids);
62 bool GetCmdlineForPID(pid_t pid, std::string* name);
63
64 base::Optional<std::string> ReadStatus(pid_t pid);
65 base::Optional<uint32_t> GetRssAnonAndSwap(const std::string&);
66 // Filters the list of pids (in-place), keeping only the
67 // entries satisfying the minimum size criteria for anonymous memory.
68 void RemoveUnderAnonThreshold(uint32_t min_size_kb, std::set<pid_t>* pids);
69
70 base::Optional<Uids> GetUids(const std::string&);
71
72 } // namespace profiling
73 } // namespace perfetto
74
75 #endif // SRC_PROFILING_COMMON_PROC_UTILS_H_
76