[email protected] | f164cea | 2009-11-05 23:37:40 | [diff] [blame^] | 1 | // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "chrome/browser/process_info_snapshot.h" |
| 6 | |
| 7 | #include <iostream> |
| 8 | #include <sstream> |
| 9 | |
| 10 | #include "base/string_util.h" |
| 11 | #include "base/thread.h" |
| 12 | |
| 13 | // Implementation for the Mac; calls '/bin/ps' for information when |
| 14 | // |Sample()| is called. |
| 15 | |
| 16 | // Default constructor. |
| 17 | ProcessInfoSnapshot::ProcessInfoSnapshot() { } |
| 18 | |
| 19 | // Destructor: just call |Reset()| to release everything. |
| 20 | ProcessInfoSnapshot::~ProcessInfoSnapshot() { |
| 21 | Reset(); |
| 22 | } |
| 23 | |
| 24 | // Capture the information by calling '/bin/ps'. |
| 25 | // Note: we ignore the "tsiz" (text size) display option of ps because it's |
| 26 | // always zero (tested on 10.5 and 10.6). |
| 27 | bool ProcessInfoSnapshot::Sample(std::vector<base::ProcessId> pid_list) { |
| 28 | Reset(); |
| 29 | |
| 30 | std::vector<std::string> argv; |
| 31 | argv.push_back("/bin/ps"); |
| 32 | // Get PID, PPID, (real) UID, effective UID, resident set size, virtual memory |
| 33 | // size, and command. |
| 34 | argv.push_back("-o"); |
| 35 | argv.push_back("pid=,ppid=,ruid=,uid=,rss=,vsz=,comm="); |
| 36 | // Only display the specified PIDs. |
| 37 | for(std::vector<base::ProcessId>::iterator it = pid_list.begin(); |
| 38 | it != pid_list.end(); ++it) { |
| 39 | argv.push_back("-p"); |
| 40 | argv.push_back(Int64ToString(static_cast<int64>(*it))); |
| 41 | } |
| 42 | |
| 43 | std::string output; |
| 44 | CommandLine command_line(argv); |
| 45 | if (!base::GetAppOutputRestricted(command_line, |
| 46 | &output, (pid_list.size() + 10) * 100)) { |
| 47 | LOG(ERROR) << "Failure running /bin/ps to acquire data."; |
| 48 | return false; |
| 49 | } |
| 50 | |
| 51 | std::istringstream in(output, std::istringstream::in); |
| 52 | std::string line; |
| 53 | |
| 54 | // Process lines until done. |
| 55 | while (true) { |
| 56 | ProcInfoEntry proc_info; |
| 57 | |
| 58 | // The format is as specified above to ps (see ps(1)): |
| 59 | // "-o pid=,ppid=,ruid=,uid=,rss=,vsz=,comm=". |
| 60 | // Try to read the PID; if we get it, we should be able to get the rest of |
| 61 | // the line. |
| 62 | in >> proc_info.pid; |
| 63 | if (in.eof()) |
| 64 | break; |
| 65 | in >> proc_info.ppid; |
| 66 | in >> proc_info.uid; |
| 67 | in >> proc_info.euid; |
| 68 | in >> proc_info.rss; |
| 69 | in >> proc_info.vsize; |
| 70 | in.ignore(1, ' '); // Eat the space. |
| 71 | std::getline(in, proc_info.command); // Get the rest of the line. |
| 72 | if (!in.good()) { |
| 73 | LOG(ERROR) << "Error parsing output from /usr/bin/top."; |
| 74 | return false; |
| 75 | } |
| 76 | |
| 77 | // Make sure the new PID isn't already in our list. |
| 78 | if (proc_info_entries_.find(proc_info.pid) != proc_info_entries_.end()) { |
| 79 | LOG(ERROR) << "Duplicate PID in output from /bin/ps."; |
| 80 | return false; |
| 81 | } |
| 82 | |
| 83 | if (!proc_info.pid || ! proc_info.vsize) { |
| 84 | LOG(WARNING) << "Invalid data from /bin/ps."; |
| 85 | return false; |
| 86 | } |
| 87 | |
| 88 | // Record the process information. |
| 89 | proc_info_entries_[proc_info.pid] = proc_info; |
| 90 | } |
| 91 | |
| 92 | return true; |
| 93 | } |
| 94 | |
| 95 | // Clear all the stored information. |
| 96 | void ProcessInfoSnapshot::Reset() { |
| 97 | proc_info_entries_.clear(); |
| 98 | } |
| 99 | |
| 100 | bool ProcessInfoSnapshot::GetProcInfo(int pid, |
| 101 | ProcInfoEntry* proc_info) const { |
| 102 | std::map<int,ProcInfoEntry>::const_iterator it = proc_info_entries_.find(pid); |
| 103 | if (it == proc_info_entries_.end()) |
| 104 | return false; |
| 105 | |
| 106 | *proc_info = it->second; |
| 107 | return true; |
| 108 | } |
| 109 | |
| 110 | bool ProcessInfoSnapshot::GetCommittedKBytesOfPID( |
| 111 | int pid, |
| 112 | base::CommittedKBytes* usage) const { |
| 113 | // Try to avoid crashing on a bug; stats aren't usually so crucial. |
| 114 | if (!usage) { |
| 115 | NOTREACHED(); |
| 116 | return false; |
| 117 | } |
| 118 | |
| 119 | // Failure of |GetProcInfo()| is "normal", due to racing. |
| 120 | ProcInfoEntry proc_info; |
| 121 | if (!GetProcInfo(pid, &proc_info)) { |
| 122 | usage->priv = 0; |
| 123 | usage->mapped = 0; |
| 124 | usage->image = 0; |
| 125 | return false; |
| 126 | } |
| 127 | |
| 128 | usage->priv = proc_info.vsize; |
| 129 | usage->mapped = 0; |
| 130 | usage->image = 0; |
| 131 | return true; |
| 132 | } |
| 133 | |
| 134 | bool ProcessInfoSnapshot::GetWorkingSetKBytesOfPID( |
| 135 | int pid, |
| 136 | base::WorkingSetKBytes* ws_usage) const { |
| 137 | // Try to avoid crashing on a bug; stats aren't usually so crucial. |
| 138 | if (!ws_usage) { |
| 139 | NOTREACHED(); |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | // Failure of |GetProcInfo()| is "normal", due to racing. |
| 144 | ProcInfoEntry proc_info; |
| 145 | if (!GetProcInfo(pid, &proc_info)) { |
| 146 | ws_usage->priv = 0; |
| 147 | ws_usage->shareable = 0; |
| 148 | ws_usage->shared = 0; |
| 149 | return false; |
| 150 | } |
| 151 | |
| 152 | ws_usage->priv = 0; |
| 153 | ws_usage->shareable = proc_info.rss; |
| 154 | ws_usage->shared = 0; |
| 155 | return true; |
| 156 | } |