chrome/browser/memory_details_linux.cc

   1 // Copyright (c) 2012 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/memory_details.h"
   6
   7 #include <sys/types.h>
   8 #include <unistd.h>
   9
  10 #include <map>
  11 #include <set>
  12
  13 #include "base/bind.h"
  14 #include "base/file_util.h"
  15 #include "base/process/process_iterator.h"
  16 #include "base/process/process_metrics.h"
  17 #include "base/strings/string_number_conversions.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/strings/utf_string_conversions.h"
  20 #include "chrome/common/chrome_constants.h"
  21 #include "content/public/browser/browser_thread.h"
  22 #include "content/public/common/process_type.h"
  23 #include "grit/chromium_strings.h"
  24 #include "ui/base/l10n/l10n_util.h"
  25
  26 using base::ProcessEntry;
  27 using content::BrowserThread;
  28
  29 // Known browsers which we collect details for.
  30 enum BrowserType {
  31   CHROME = 0,
  32   FIREFOX,
  33   ICEWEASEL,
  34   OPERA,
  35   KONQUEROR,
  36   EPIPHANY,
  37   MIDORI,
  38   MAX_BROWSERS
  39 } BrowserProcess;
  40
  41 // The pretty printed names of those browsers. Matches up with enum
  42 // BrowserType.
  43 static const char kBrowserPrettyNames[][10] = {
  44   "Chrome",
  45   "Firefox",
  46   "Iceweasel",
  47   "Opera",
  48   "Konqueror",
  49   "Epiphany",
  50   "Midori",
  51 };
  52
  53 // A mapping from process name to the type of browser.
  54 static const struct {
  55   const char process_name[16];
  56   BrowserType browser;
  57 } kBrowserBinaryNames[] = {
  58   { "firefox", FIREFOX },
  59   { "firefox-3.5", FIREFOX },
  60   { "firefox-3.0", FIREFOX },
  61   { "firefox-bin", FIREFOX },
  62   { "iceweasel", ICEWEASEL },
  63   { "opera", OPERA },
  64   { "konqueror", KONQUEROR },
  65   { "epiphany-browse", EPIPHANY },
  66   { "epiphany", EPIPHANY },
  67   { "midori", MIDORI },
  68   { "", MAX_BROWSERS },
  69 };
  70
  71 MemoryDetails::MemoryDetails()
  72     : user_metrics_mode_(UPDATE_USER_METRICS),
  73       memory_growth_tracker_(NULL) {
  74 }
  75
  76 ProcessData* MemoryDetails::ChromeBrowser() {
  77   return &process_data_[0];
  78 }
  79
  80 struct Process {
  81   pid_t pid;
  82   pid_t parent;
  83   std::string name;
  84 };
  85
  86 typedef std::map<pid_t, Process> ProcessMap;
  87
  88 // Get information on all the processes running on the system.
  89 static ProcessMap GetProcesses() {
  90   ProcessMap map;
  91
  92   base::ProcessIterator process_iter(NULL);
  93   while (const ProcessEntry* process_entry = process_iter.NextProcessEntry()) {
  94     Process process;
  95     process.pid = process_entry->pid();
  96     process.parent = process_entry->parent_pid();
  97     process.name = process_entry->exe_file();
  98     map.insert(std::make_pair(process.pid, process));
  99   }
 100   return map;
 101 }
 102
 103 // Given a process name, return the type of the browser which created that
 104 // process, or |MAX_BROWSERS| if we don't know about it.
 105 static BrowserType GetBrowserType(const std::string& process_name) {
 106   for (unsigned i = 0; kBrowserBinaryNames[i].process_name[0]; ++i) {
 107     if (strcmp(process_name.c_str(), kBrowserBinaryNames[i].process_name) == 0)
 108       return kBrowserBinaryNames[i].browser;
 109   }
 110
 111   return MAX_BROWSERS;
 112 }
 113
 114 // For each of a list of pids, collect memory information about that process.
 115 static ProcessData GetProcessDataMemoryInformation(
 116     const std::vector<pid_t>& pids) {
 117   ProcessData process_data;
 118   for (std::vector<pid_t>::const_iterator iter = pids.begin();
 119        iter != pids.end();
 120        ++iter) {
 121     ProcessMemoryInformation pmi;
 122
 123     pmi.pid = *iter;
 124     pmi.num_processes = 1;
 125
 126     if (pmi.pid == base::GetCurrentProcId())
 127       pmi.process_type = content::PROCESS_TYPE_BROWSER;
 128     else
 129       pmi.process_type = content::PROCESS_TYPE_UNKNOWN;
 130
 131     base::ProcessMetrics* metrics =
 132         base::ProcessMetrics::CreateProcessMetrics(*iter);
 133     metrics->GetWorkingSetKBytes(&pmi.working_set);
 134     delete metrics;
 135
 136     process_data.processes.push_back(pmi);
 137   }
 138   return process_data;
 139 }
 140
 141 // Find all children of the given process with pid |root|.
 142 static std::vector<pid_t> GetAllChildren(const ProcessMap& processes,
 143                                          const pid_t root) {
 144   std::vector<pid_t> children;
 145   children.push_back(root);
 146
 147   std::set<pid_t> wavefront, next_wavefront;
 148   wavefront.insert(root);
 149
 150   while (wavefront.size()) {
 151     for (ProcessMap::const_iterator iter = processes.begin();
 152          iter != processes.end();
 153          ++iter) {
 154       const Process& process = iter->second;
 155       if (wavefront.count(process.parent)) {
 156         children.push_back(process.pid);
 157         next_wavefront.insert(process.pid);
 158       }
 159     }
 160
 161     wavefront.clear();
 162     wavefront.swap(next_wavefront);
 163   }
 164   return children;
 165 }
 166
 167 void MemoryDetails::CollectProcessData(
 168     const std::vector<ProcessMemoryInformation>& child_info) {
 169   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 170
 171   ProcessMap process_map = GetProcesses();
 172   std::set<pid_t> browsers_found;
 173
 174   // For each process on the system, if it appears to be a browser process and
 175   // it's parent isn't a browser process, then record it in |browsers_found|.
 176   for (ProcessMap::const_iterator iter = process_map.begin();
 177        iter != process_map.end();
 178        ++iter) {
 179     const Process& current_process = iter->second;
 180     const BrowserType type = GetBrowserType(current_process.name);
 181     if (type == MAX_BROWSERS)
 182       continue;
 183
 184     ProcessMap::const_iterator parent_iter =
 185         process_map.find(current_process.parent);
 186     if (parent_iter == process_map.end()) {
 187       browsers_found.insert(current_process.pid);
 188       continue;
 189     }
 190
 191     if (GetBrowserType(parent_iter->second.name) != type) {
 192       // We found a process whose type is diffent from its parent's type.
 193       // That means it is the root process of the browser.
 194       browsers_found.insert(current_process.pid);
 195       break;
 196     }
 197   }
 198
 199   ProcessData current_browser =
 200       GetProcessDataMemoryInformation(GetAllChildren(process_map, getpid()));
 201   current_browser.name = l10n_util::GetStringUTF16(IDS_SHORT_PRODUCT_NAME);
 202   current_browser.process_name = base::ASCIIToUTF16("chrome");
 203
 204   for (std::vector<ProcessMemoryInformation>::iterator
 205        i = current_browser.processes.begin();
 206        i != current_browser.processes.end(); ++i) {
 207     // Check if this is one of the child processes whose data we collected
 208     // on the IO thread, and if so copy over that data.
 209     for (size_t child = 0; child < child_info.size(); child++) {
 210       if (child_info[child].pid != i->pid)
 211         continue;
 212       i->titles = child_info[child].titles;
 213       i->process_type = child_info[child].process_type;
 214       break;
 215     }
 216   }
 217
 218   process_data_.push_back(current_browser);
 219
 220   // For each browser process, collect a list of its children and get the
 221   // memory usage of each.
 222   for (std::set<pid_t>::const_iterator iter = browsers_found.begin();
 223        iter != browsers_found.end();
 224        ++iter) {
 225     std::vector<pid_t> browser_processes = GetAllChildren(process_map, *iter);
 226     ProcessData browser = GetProcessDataMemoryInformation(browser_processes);
 227
 228     ProcessMap::const_iterator process_iter = process_map.find(*iter);
 229     if (process_iter == process_map.end())
 230       continue;
 231     BrowserType type = GetBrowserType(process_iter->second.name);
 232     if (type != MAX_BROWSERS)
 233       browser.name = base::ASCIIToUTF16(kBrowserPrettyNames[type]);
 234     process_data_.push_back(browser);
 235   }
 236
 237 #if defined(OS_CHROMEOS)
 238   base::GetSwapInfo(&swap_info_);
 239 #endif
 240
 241   // Finally return to the browser thread.
 242   BrowserThread::PostTask(
 243       BrowserThread::UI, FROM_HERE,
 244       base::Bind(&MemoryDetails::CollectChildInfoOnUIThread, this));
 245 }