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 #if ENABLE(INSPECTOR)
34
35 #include "ScriptGCEvent.h"
36 #include "ScriptGCEventListener.h"
37
38 #include <wtf/CurrentTime.h>
39
40 namespace WebCore {
41
42 ScriptGCEvent::GCEventListeners ScriptGCEvent::s_eventListeners;
43 double ScriptGCEvent::s_startTime = 0.0;
44 size_t ScriptGCEvent::s_usedHeapSize = 0;
45
addEventListener(ScriptGCEventListener * eventListener)46 void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener)
47 {
48 ASSERT(eventListener);
49 if (s_eventListeners.isEmpty()) {
50 v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
51 v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
52 }
53 s_eventListeners.append(eventListener);
54 }
55
removeEventListener(ScriptGCEventListener * eventListener)56 void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener)
57 {
58 ASSERT(eventListener);
59 ASSERT(!s_eventListeners.isEmpty());
60 size_t i = s_eventListeners.find(eventListener);
61 ASSERT(i != notFound);
62 s_eventListeners.remove(i);
63 if (s_eventListeners.isEmpty()) {
64 v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
65 v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
66 }
67 }
68
getHeapSize(size_t & usedHeapSize,size_t & totalHeapSize,size_t & heapSizeLimit)69 void ScriptGCEvent::getHeapSize(size_t& usedHeapSize, size_t& totalHeapSize, size_t& heapSizeLimit)
70 {
71 v8::HeapStatistics heapStatistics;
72 v8::V8::GetHeapStatistics(&heapStatistics);
73 usedHeapSize = heapStatistics.used_heap_size();
74 totalHeapSize = heapStatistics.total_heap_size();
75 heapSizeLimit = heapStatistics.heap_size_limit();
76 }
77
getUsedHeapSize()78 size_t ScriptGCEvent::getUsedHeapSize()
79 {
80 v8::HeapStatistics heapStatistics;
81 v8::V8::GetHeapStatistics(&heapStatistics);
82 return heapStatistics.used_heap_size();
83 }
84
gcPrologueCallback(v8::GCType type,v8::GCCallbackFlags flags)85 void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags)
86 {
87 s_startTime = WTF::currentTimeMS();
88 s_usedHeapSize = getUsedHeapSize();
89 }
90
gcEpilogueCallback(v8::GCType type,v8::GCCallbackFlags flags)91 void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags)
92 {
93 double endTime = WTF::currentTimeMS();
94 size_t collectedBytes = s_usedHeapSize - getUsedHeapSize();
95 GCEventListeners listeners(s_eventListeners);
96 for (GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i)
97 (*i)->didGC(s_startTime, endTime, collectedBytes);
98 }
99
100 } // namespace WebCore
101
102 #endif // ENABLE(INSPECTOR)
103