chrome/browser/memory_details_android.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 <memory>
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/bind.h"
  13 #include "base/process/process_iterator.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/threading/scoped_blocking_call.h"
  16 #include "chrome/common/chrome_constants.h"
  17 #include "chrome/grit/chromium_strings.h"
  18 #include "content/public/browser/browser_task_traits.h"
  19 #include "content/public/browser/browser_thread.h"
  20 #include "content/public/common/process_type.h"
  21 #include "ui/base/l10n/l10n_util.h"
  22
  23 using base::ProcessEntry;
  24 using base::ProcessId;
  25 namespace {
  26
  27 // A helper for |CollectProcessData()| to include the chrome sandboxed
  28 // processes in android which are not running as a child of the browser
  29 // process.
  30 void AddNonChildChromeProcesses(
  31     std::vector<ProcessMemoryInformation>* processes) {
  32   base::ProcessIterator process_iter(NULL);
  33   while (const ProcessEntry* process_entry = process_iter.NextProcessEntry()) {
  34     const std::vector<std::string>& cmd_args = process_entry->cmd_line_args();
  35     if (cmd_args.empty() ||
  36         cmd_args[0].find(chrome::kHelperProcessExecutableName) ==
  37             std::string::npos) {
  38       continue;
  39     }
  40     ProcessMemoryInformation info;
  41     info.pid = process_entry->pid();
  42     processes->push_back(info);
  43   }
  44 }
  45
  46 // For each of the pids, collect memory information about that process
  47 // and append a record to |out|.
  48 void GetProcessDataMemoryInformation(
  49     const std::set<ProcessId>& pids, ProcessData* out) {
  50   for (std::set<ProcessId>::const_iterator i = pids.begin(); i != pids.end();
  51        ++i) {
  52     ProcessMemoryInformation pmi;
  53
  54     pmi.pid = *i;
  55     pmi.num_processes = 1;
  56
  57     base::ProcessId current_pid = base::GetCurrentProcId();
  58     if (pmi.pid == current_pid)
  59       pmi.process_type = content::PROCESS_TYPE_BROWSER;
  60     else
  61       pmi.process_type = content::PROCESS_TYPE_UNKNOWN;
  62
  63     std::unique_ptr<base::ProcessMetrics> metrics(
  64         base::ProcessMetrics::CreateProcessMetrics(*i));
  65
  66     // TODO(ssid): Reading "/proc/fd" only works for current process. For child
  67     // processes, the values need to be computed by the process itself.
  68     if (pmi.pid == current_pid) {
  69       pmi.num_open_fds = metrics->GetOpenFdCount();
  70       pmi.open_fds_soft_limit = metrics->GetOpenFdSoftLimit();
  71     }
  72
  73     out->processes.push_back(pmi);
  74   }
  75 }
  76
  77 // Find all children of the given process.
  78 void GetAllChildren(const std::vector<ProcessEntry>& processes,
  79                     const std::set<ProcessId>& roots,
  80                     std::set<ProcessId>* out) {
  81   *out = roots;
  82
  83   std::set<ProcessId> wavefront;
  84   for (std::set<ProcessId>::const_iterator i = roots.begin(); i != roots.end();
  85        ++i) {
  86     wavefront.insert(*i);
  87   }
  88
  89   while (wavefront.size()) {
  90     std::set<ProcessId> next_wavefront;
  91     for (std::vector<ProcessEntry>::const_iterator i = processes.begin();
  92          i != processes.end(); ++i) {
  93       if (wavefront.count(i->parent_pid())) {
  94         out->insert(i->pid());
  95         next_wavefront.insert(i->pid());
  96       }
  97     }
  98
  99     wavefront.clear();
 100     wavefront.swap(next_wavefront);
 101   }
 102 }
 103
 104 }  // namespace
 105
 106 MemoryDetails::MemoryDetails() {
 107 }
 108
 109 ProcessData* MemoryDetails::ChromeBrowser() {
 110   return &process_data_[0];
 111 }
 112
 113 void MemoryDetails::CollectProcessData(
 114     const std::vector<ProcessMemoryInformation>& chrome_processes) {
 115   base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
 116                                                 base::BlockingType::WILL_BLOCK);
 117
 118   std::vector<ProcessMemoryInformation> all_processes(chrome_processes);
 119   AddNonChildChromeProcesses(&all_processes);
 120
 121   std::vector<ProcessEntry> processes;
 122   base::ProcessIterator process_iter(NULL);
 123   while (const ProcessEntry* process_entry = process_iter.NextProcessEntry()) {
 124     processes.push_back(*process_entry);
 125   }
 126
 127   std::set<ProcessId> roots;
 128   roots.insert(base::GetCurrentProcId());
 129   for (std::vector<ProcessMemoryInformation>::const_iterator
 130        i = all_processes.begin(); i != all_processes.end(); ++i) {
 131     roots.insert(i->pid);
 132   }
 133
 134   std::set<ProcessId> current_browser_processes;
 135   GetAllChildren(processes, roots, &current_browser_processes);
 136
 137   ProcessData current_browser;
 138   GetProcessDataMemoryInformation(current_browser_processes, &current_browser);
 139   current_browser.name = l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
 140   current_browser.process_name =
 141       base::ASCIIToUTF16(chrome::kBrowserProcessExecutableName);
 142   process_data_.push_back(current_browser);
 143
 144   // Finally return to the browser thread.
 145   content::GetUIThreadTaskRunner({})->PostTask(
 146       FROM_HERE,
 147       base::BindOnce(&MemoryDetails::CollectChildInfoOnUIThread, this));
 148 }