content/browser/profiler_controller_impl.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 "content/browser/profiler_controller_impl.h"
   6
   7 #include "base/bind.h"
   8 #include "base/process/process_handle.h"
   9 #include "base/tracked_objects.h"
  10 #include "content/common/child_process_messages.h"
  11 #include "content/public/browser/browser_child_process_host_iterator.h"
  12 #include "content/public/browser/browser_thread.h"
  13 #include "content/public/browser/child_process_data.h"
  14 #include "content/public/browser/profiler_subscriber.h"
  15 #include "content/public/browser/render_process_host.h"
  16
  17 namespace content {
  18
  19 ProfilerController* ProfilerController::GetInstance() {
  20   return ProfilerControllerImpl::GetInstance();
  21 }
  22
  23 ProfilerControllerImpl* ProfilerControllerImpl::GetInstance() {
  24   return Singleton<ProfilerControllerImpl>::get();
  25 }
  26
  27 ProfilerControllerImpl::ProfilerControllerImpl() : subscriber_(NULL) {
  28 }
  29
  30 ProfilerControllerImpl::~ProfilerControllerImpl() {
  31 }
  32
  33 void ProfilerControllerImpl::OnPendingProcesses(int sequence_number,
  34                                                 int pending_processes,
  35                                                 bool end) {
  36   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  37   if (subscriber_)
  38     subscriber_->OnPendingProcesses(sequence_number, pending_processes, end);
  39 }
  40
  41 void ProfilerControllerImpl::OnProfilerDataCollected(
  42     int sequence_number,
  43     const tracked_objects::ProcessDataSnapshot& profiler_data,
  44     int process_type) {
  45   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
  46     BrowserThread::PostTask(
  47         BrowserThread::UI, FROM_HERE,
  48         base::Bind(&ProfilerControllerImpl::OnProfilerDataCollected,
  49                    base::Unretained(this),
  50                    sequence_number,
  51                    profiler_data,
  52                    process_type));
  53     return;
  54   }
  55
  56   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  57   if (subscriber_) {
  58     subscriber_->OnProfilerDataCollected(sequence_number, profiler_data,
  59                                          process_type);
  60   }
  61 }
  62
  63 void ProfilerControllerImpl::Register(ProfilerSubscriber* subscriber) {
  64   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  65   DCHECK(!subscriber_);
  66   subscriber_ = subscriber;
  67 }
  68
  69 void ProfilerControllerImpl::Unregister(const ProfilerSubscriber* subscriber) {
  70   DCHECK_EQ(subscriber_, subscriber);
  71   subscriber_ = NULL;
  72 }
  73
  74 void ProfilerControllerImpl::GetProfilerDataFromChildProcesses(
  75     int sequence_number) {
  76   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  77
  78   int pending_processes = 0;
  79   for (BrowserChildProcessHostIterator iter; !iter.Done(); ++iter) {
  80     // In some cases, there may be no child process of the given type (for
  81     // example, the GPU process may not exist and there may instead just be a
  82     // GPU thread in the browser process). If that's the case, then the process
  83     // handle will be base::kNullProcessHandle and we shouldn't ask it for data.
  84     if (iter.GetData().handle == base::kNullProcessHandle)
  85       continue;
  86
  87     ++pending_processes;
  88     if (!iter.Send(new ChildProcessMsg_GetChildProfilerData(sequence_number)))
  89       --pending_processes;
  90   }
  91
  92   BrowserThread::PostTask(
  93       BrowserThread::UI,
  94       FROM_HERE,
  95       base::Bind(
  96           &ProfilerControllerImpl::OnPendingProcesses,
  97           base::Unretained(this),
  98           sequence_number,
  99           pending_processes,
 100           true));
 101 }
 102
 103 void ProfilerControllerImpl::GetProfilerData(int sequence_number) {
 104   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 105
 106   int pending_processes = 0;
 107   for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
 108        !it.IsAtEnd(); it.Advance()) {
 109     ++pending_processes;
 110     if (!it.GetCurrentValue()->Send(
 111             new ChildProcessMsg_GetChildProfilerData(sequence_number))) {
 112       --pending_processes;
 113     }
 114   }
 115   OnPendingProcesses(sequence_number, pending_processes, false);
 116
 117   BrowserThread::PostTask(
 118       BrowserThread::IO,
 119       FROM_HERE,
 120       base::Bind(&ProfilerControllerImpl::GetProfilerDataFromChildProcesses,
 121                  base::Unretained(this),
 122                  sequence_number));
 123 }
 124
 125 }  // namespace content