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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* Copyright (C) 2014 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "public/web/WebLeakDetector.h"
#include "bindings/core/v8/V8Binding.h"
#include "bindings/core/v8/V8GCController.h"
#include "core/dom/Document.h"
#include "core/fetch/MemoryCache.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/inspector/InspectorCounters.h"
#include "core/rendering/RenderObject.h"
#include "modules/webaudio/AudioNode.h"
#include "platform/Timer.h"
#include "public/web/WebDocument.h"
#include "public/web/WebLocalFrame.h"
#include "web/WebEmbeddedWorkerImpl.h"
#include <v8.h>
namespace blink {
namespace {
// FIXME: Oilpan: It may take multiple GC to collect on-heap objects referenced from off-heap objects.
// Please see comment in Heap::collectAllGarbage()
static const int kNumberOfGCsToClaimChains = 5;
class WebLeakDetectorImpl final : public WebLeakDetector {
WTF_MAKE_NONCOPYABLE(WebLeakDetectorImpl);
public:
explicit WebLeakDetectorImpl(WebLeakDetectorClient* client)
: m_client(client)
, m_delayedGCAndReportTimer(this, &WebLeakDetectorImpl::delayedGCAndReport)
, m_delayedReportTimer(this, &WebLeakDetectorImpl::delayedReport)
, m_numberOfGCNeeded(0)
{
ASSERT(m_client);
}
virtual ~WebLeakDetectorImpl() { }
virtual void collectGarbageAndGetDOMCounts(WebLocalFrame*) override;
private:
void delayedGCAndReport(Timer<WebLeakDetectorImpl>*);
void delayedReport(Timer<WebLeakDetectorImpl>*);
WebLeakDetectorClient* m_client;
Timer<WebLeakDetectorImpl> m_delayedGCAndReportTimer;
Timer<WebLeakDetectorImpl> m_delayedReportTimer;
int m_numberOfGCNeeded;
};
void WebLeakDetectorImpl::collectGarbageAndGetDOMCounts(WebLocalFrame* frame)
{
WebEmbeddedWorkerImpl::terminateAll();
memoryCache()->evictResources();
{
RefPtrWillBeRawPtr<Document> document = PassRefPtrWillBeRawPtr<Document>(frame->document());
if (ResourceFetcher* fetcher = document->fetcher())
fetcher->garbageCollectDocumentResources();
}
// FIXME: HTML5 Notification should be closed because notification affects the result of number of DOM objects.
for (int i = 0; i < kNumberOfGCsToClaimChains; ++i)
V8GCController::collectGarbage(v8::Isolate::GetCurrent());
// Note: Oilpan precise GC is scheduled at the end of the event loop.
// Task queue may contain delayed object destruction tasks.
// This method is called from navigation hook inside FrameLoader,
// so previous document is still held by the loader until the next event loop.
// Complete all pending tasks before proceeding to gc.
m_numberOfGCNeeded = 2;
m_delayedGCAndReportTimer.startOneShot(0, FROM_HERE);
}
void WebLeakDetectorImpl::delayedGCAndReport(Timer<WebLeakDetectorImpl>*)
{
// We do a second and third GC here to address flakiness
// The second GC is necessary as Resource GC may have postponed clean-up tasks to next event loop.
// The third GC is necessary for cleaning up Document after worker object died.
for (int i = 0; i < kNumberOfGCsToClaimChains; ++i)
V8GCController::collectGarbage(V8PerIsolateData::mainThreadIsolate());
// Note: Oilpan precise GC is scheduled at the end of the event loop.
// Inspect counters on the next event loop.
if (--m_numberOfGCNeeded)
m_delayedGCAndReportTimer.startOneShot(0, FROM_HERE);
else
m_delayedReportTimer.startOneShot(0, FROM_HERE);
}
void WebLeakDetectorImpl::delayedReport(Timer<WebLeakDetectorImpl>*)
{
ASSERT(m_client);
WebLeakDetectorClient::Result result;
result.numberOfLiveAudioNodes = AudioNode::instanceCount();
result.numberOfLiveDocuments = InspectorCounters::counterValue(InspectorCounters::DocumentCounter);
result.numberOfLiveNodes = InspectorCounters::counterValue(InspectorCounters::NodeCounter);
result.numberOfLiveRenderObjects = RenderObject::instanceCount();
result.numberOfLiveResources = Resource::instanceCount();
m_client->onLeakDetectionComplete(result);
#ifndef NDEBUG
showLiveDocumentInstances();
#endif
}
} // namespace
WebLeakDetector* WebLeakDetector::create(WebLeakDetectorClient* client)
{
return new WebLeakDetectorImpl(client);
}
} // namespace blink
|
