1/*
2 * Copyright (C) 2015 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "Debugger.h"
29#include "JSGlobalObject.h"
30#include <wtf/Optional.h>
31
32namespace JSC {
33
34class ScriptProfilingScope {
35public:
36 ScriptProfilingScope(JSGlobalObject* globalObject, ProfilingReason reason)
37 : m_globalObject(globalObject)
38 , m_reason(reason)
39 {
40 if (shouldStartProfile())
41 m_startTime = m_globalObject->debugger()->willEvaluateScript();
42 }
43
44 ~ScriptProfilingScope()
45 {
46 if (shouldEndProfile())
47 m_globalObject->debugger()->didEvaluateScript(m_startTime.value(), m_reason);
48 }
49
50private:
51 bool shouldStartProfile() const
52 {
53 if (!m_globalObject)
54 return false;
55
56 if (!m_globalObject->hasDebugger())
57 return false;
58
59 if (!m_globalObject->debugger()->hasProfilingClient())
60 return false;
61
62 if (m_globalObject->debugger()->isAlreadyProfiling())
63 return false;
64
65 return true;
66 }
67
68 bool shouldEndProfile() const
69 {
70 // Did not start a profile.
71 if (!m_startTime)
72 return false;
73
74 // Debugger may have been removed.
75 if (!m_globalObject->hasDebugger())
76 return false;
77
78 // Profiling Client may have been removed.
79 if (!m_globalObject->debugger()->hasProfilingClient())
80 return false;
81
82 return true;
83 }
84
85 JSGlobalObject* m_globalObject { nullptr };
86 Optional<Seconds> m_startTime;
87 ProfilingReason m_reason;
88};
89
90} // namespace JSC
91