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#include "ScriptProfiler.h"
33
34#include "InspectorValues.h"
35#include "RetainedDOMInfo.h"
36#include "V8Binding.h"
37#include "V8Node.h"
38
39#include <v8-profiler.h>
40
41namespace WebCore {
42
43#if ENABLE(INSPECTOR)
44void ScriptProfiler::start(ScriptState* state, const String& title)
45{
46    v8::HandleScope hs;
47    v8::CpuProfiler::StartProfiling(v8String(title));
48}
49
50PassRefPtr<ScriptProfile> ScriptProfiler::stop(ScriptState* state, const String& title)
51{
52    v8::HandleScope hs;
53    const v8::CpuProfile* profile = state ?
54        v8::CpuProfiler::StopProfiling(v8String(title), state->context()->GetSecurityToken()) :
55        v8::CpuProfiler::StopProfiling(v8String(title));
56    return profile ? ScriptProfile::create(profile) : 0;
57}
58
59void ScriptProfiler::collectGarbage()
60{
61    // NOTE : There is currently no direct way to collect memory from the v8 C++ API
62    // but notifying low-memory forces a mark-compact, which is exactly what we want
63    // in this case.
64    v8::V8::LowMemoryNotification();
65}
66
67namespace {
68
69class ActivityControlAdapter : public v8::ActivityControl {
70public:
71    ActivityControlAdapter(ScriptProfiler::HeapSnapshotProgress* progress)
72            : m_progress(progress), m_firstReport(true) { }
73    ControlOption ReportProgressValue(int done, int total)
74    {
75        ControlOption result = m_progress->isCanceled() ? kAbort : kContinue;
76        if (m_firstReport) {
77            m_firstReport = false;
78            m_progress->Start(total);
79        } else
80            m_progress->Worked(done);
81        if (done >= total)
82            m_progress->Done();
83        return result;
84    }
85private:
86    ScriptProfiler::HeapSnapshotProgress* m_progress;
87    bool m_firstReport;
88};
89
90} // namespace
91
92PassRefPtr<ScriptHeapSnapshot> ScriptProfiler::takeHeapSnapshot(const String& title, HeapSnapshotProgress* control)
93{
94    v8::HandleScope hs;
95    const v8::HeapSnapshot* snapshot = 0;
96    if (control) {
97        ActivityControlAdapter adapter(control);
98        snapshot = v8::HeapProfiler::TakeSnapshot(v8String(title), v8::HeapSnapshot::kFull, &adapter);
99    } else
100        snapshot = v8::HeapProfiler::TakeSnapshot(v8String(title), v8::HeapSnapshot::kAggregated);
101    return snapshot ? ScriptHeapSnapshot::create(snapshot) : 0;
102}
103
104static v8::RetainedObjectInfo* retainedDOMInfo(uint16_t classId, v8::Handle<v8::Value> wrapper)
105{
106    ASSERT(classId == v8DOMSubtreeClassId);
107    if (!wrapper->IsObject())
108        return 0;
109    Node* node = V8Node::toNative(wrapper.As<v8::Object>());
110    return node ? new RetainedDOMInfo(node) : 0;
111}
112#endif // ENABLE(INSPECTOR)
113
114void ScriptProfiler::initialize()
115{
116#if ENABLE(INSPECTOR)
117    v8::HeapProfiler::DefineWrapperClass(v8DOMSubtreeClassId, &retainedDOMInfo);
118#endif // ENABLE(INSPECTOR)
119}
120
121
122} // namespace WebCore
123