1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/histogram_controller.h"
#include "base/bind.h"
#include "base/metrics/histogram.h"
#include "base/process/process_handle.h"
#include "content/browser/histogram_subscriber.h"
#include "content/common/child_process_messages.h"
#include "content/public/browser/browser_child_process_host_iterator.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/process_type.h"
namespace content {
HistogramController* HistogramController::GetInstance() {
return base::Singleton<HistogramController>::get();
}
HistogramController::HistogramController() : subscriber_(NULL) {
}
HistogramController::~HistogramController() {
}
void HistogramController::OnPendingProcesses(int sequence_number,
int pending_processes,
bool end) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (subscriber_)
subscriber_->OnPendingProcesses(sequence_number, pending_processes, end);
}
void HistogramController::OnHistogramDataCollected(
int sequence_number,
const std::vector<std::string>& pickled_histograms) {
if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&HistogramController::OnHistogramDataCollected,
base::Unretained(this),
sequence_number,
pickled_histograms));
return;
}
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (subscriber_) {
subscriber_->OnHistogramDataCollected(sequence_number,
pickled_histograms);
}
}
void HistogramController::Register(HistogramSubscriber* subscriber) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!subscriber_);
subscriber_ = subscriber;
}
void HistogramController::Unregister(
const HistogramSubscriber* subscriber) {
DCHECK_EQ(subscriber_, subscriber);
subscriber_ = NULL;
}
void HistogramController::GetHistogramDataFromChildProcesses(
int sequence_number) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
int pending_processes = 0;
for (BrowserChildProcessHostIterator iter; !iter.Done(); ++iter) {
const ChildProcessData& data = iter.GetData();
int type = data.process_type;
if (type != PROCESS_TYPE_PLUGIN &&
type != PROCESS_TYPE_GPU &&
type != PROCESS_TYPE_PPAPI_PLUGIN &&
type != PROCESS_TYPE_PPAPI_BROKER) {
continue;
}
// In some cases, there may be no child process of the given type (for
// example, the GPU process may not exist and there may instead just be a
// GPU thread in the browser process). If that's the case, then the process
// handle will be base::kNullProcessHandle and we shouldn't ask it for data.
if (data.handle == base::kNullProcessHandle)
continue;
++pending_processes;
if (!iter.Send(new ChildProcessMsg_GetChildHistogramData(sequence_number)))
--pending_processes;
}
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(
&HistogramController::OnPendingProcesses,
base::Unretained(this),
sequence_number,
pending_processes,
true));
}
void HistogramController::GetHistogramData(int sequence_number) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
int pending_processes = 0;
for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
!it.IsAtEnd(); it.Advance()) {
++pending_processes;
if (!it.GetCurrentValue()->Send(
new ChildProcessMsg_GetChildHistogramData(sequence_number))) {
--pending_processes;
}
}
OnPendingProcesses(sequence_number, pending_processes, false);
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&HistogramController::GetHistogramDataFromChildProcesses,
base::Unretained(this),
sequence_number));
}
} // namespace content
|
