1 /*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32
33
34 #include "bindings/v8/ScriptGCEvent.h"
35 #include "bindings/v8/V8Binding.h"
36 #include "core/inspector/ScriptGCEventListener.h"
37
38 #include "wtf/CurrentTime.h"
39
40 namespace WebCore {
41
isolateGCEventData()42 static GCEventData* isolateGCEventData()
43 {
44 V8PerIsolateData* isolateData = V8PerIsolateData::current();
45 ASSERT(isolateData);
46 return isolateData->gcEventData();
47 }
48
addEventListener(ScriptGCEventListener * eventListener)49 void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener)
50 {
51 GCEventData::GCEventListeners& listeners = isolateGCEventData()->listeners();
52 if (listeners.isEmpty()) {
53 v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
54 v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
55 }
56 listeners.append(eventListener);
57 }
58
removeEventListener(ScriptGCEventListener * eventListener)59 void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener)
60 {
61 ASSERT(eventListener);
62 GCEventData::GCEventListeners& listeners = isolateGCEventData()->listeners();
63 ASSERT(!listeners.isEmpty());
64 size_t i = listeners.find(eventListener);
65 ASSERT(i != kNotFound);
66 listeners.remove(i);
67 if (listeners.isEmpty()) {
68 v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
69 v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
70 }
71 }
72
getHeapSize(HeapInfo & info)73 void ScriptGCEvent::getHeapSize(HeapInfo& info)
74 {
75 v8::HeapStatistics heapStatistics;
76 v8::Isolate::GetCurrent()->GetHeapStatistics(&heapStatistics);
77 info.usedJSHeapSize = heapStatistics.used_heap_size();
78 info.totalJSHeapSize = heapStatistics.total_physical_size();
79 info.jsHeapSizeLimit = heapStatistics.heap_size_limit();
80 }
81
getUsedHeapSize()82 size_t ScriptGCEvent::getUsedHeapSize()
83 {
84 v8::HeapStatistics heapStatistics;
85 v8::Isolate::GetCurrent()->GetHeapStatistics(&heapStatistics);
86 return heapStatistics.used_heap_size();
87 }
88
gcPrologueCallback(v8::GCType type,v8::GCCallbackFlags flags)89 void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags)
90 {
91 GCEventData* gcEventData = isolateGCEventData();
92 gcEventData->setStartTime(WTF::monotonicallyIncreasingTime());
93 gcEventData->setUsedHeapSize(getUsedHeapSize());
94 }
95
gcEpilogueCallback(v8::GCType type,v8::GCCallbackFlags flags)96 void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags)
97 {
98 GCEventData* gcEventData = isolateGCEventData();
99 if (!gcEventData->usedHeapSize())
100 return;
101 double endTime = WTF::monotonicallyIncreasingTime();
102 size_t usedHeapSize = getUsedHeapSize();
103 size_t collectedBytes = usedHeapSize > gcEventData->usedHeapSize() ? 0 : gcEventData->usedHeapSize() - usedHeapSize;
104 GCEventData::GCEventListeners& listeners = gcEventData->listeners();
105 for (GCEventData::GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i)
106 (*i)->didGC(gcEventData->startTime(), endTime, collectedBytes);
107 gcEventData->clear();
108 }
109
110 } // namespace WebCore
111
112