1/*
2 * Copyright (C) 2008 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 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "Profiler.h"
31
32#include "CommonIdentifiers.h"
33#include "CallFrame.h"
34#include "CodeBlock.h"
35#include "JSFunction.h"
36#include "JSGlobalObject.h"
37#include "Nodes.h"
38#include "Profile.h"
39#include "ProfileGenerator.h"
40#include "ProfileNode.h"
41#include <stdio.h>
42
43namespace JSC {
44
45static const char* GlobalCodeExecution = "(program)";
46static const char* AnonymousFunction = "(anonymous function)";
47static unsigned ProfilesUID = 0;
48
49static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSFunction*);
50
51Profiler* Profiler::s_sharedProfiler = 0;
52Profiler* Profiler::s_sharedEnabledProfilerReference = 0;
53
54Profiler* Profiler::profiler()
55{
56 if (!s_sharedProfiler)
57 s_sharedProfiler = new Profiler();
58 return s_sharedProfiler;
59}
60
61void Profiler::startProfiling(ExecState* exec, const UString& title)
62{
63 ASSERT_ARG(title, !title.isNull());
64
65 // Check if we currently have a Profile for this global ExecState and title.
66 // If so return early and don't create a new Profile.
67 ExecState* globalExec = exec ? exec->lexicalGlobalObject()->globalExec() : 0;
68
69 for (size_t i = 0; i < m_currentProfiles.size(); ++i) {
70 ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
71 if (profileGenerator->originatingGlobalExec() == globalExec && profileGenerator->title() == title)
72 return;
73 }
74
75 s_sharedEnabledProfilerReference = this;
76 RefPtr<ProfileGenerator> profileGenerator = ProfileGenerator::create(title, originatingExec: exec, uid: ++ProfilesUID);
77 m_currentProfiles.append(val: profileGenerator);
78}
79
80PassRefPtr<Profile> Profiler::stopProfiling(ExecState* exec, const UString& title)
81{
82 ExecState* globalExec = exec ? exec->lexicalGlobalObject()->globalExec() : 0;
83 for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
84 ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
85 if (profileGenerator->originatingGlobalExec() == globalExec && (title.isNull() || profileGenerator->title() == title)) {
86 profileGenerator->stopProfiling();
87 RefPtr<Profile> returnProfile = profileGenerator->profile();
88
89 m_currentProfiles.remove(position: i);
90 if (!m_currentProfiles.size())
91 s_sharedEnabledProfilerReference = 0;
92
93 return returnProfile;
94 }
95 }
96
97 return 0;
98}
99
100static inline void dispatchFunctionToProfiles(const Vector<RefPtr<ProfileGenerator> >& profiles, ProfileGenerator::ProfileFunction function, const CallIdentifier& callIdentifier, unsigned currentProfileTargetGroup)
101{
102 for (size_t i = 0; i < profiles.size(); ++i) {
103 if (profiles[i]->profileGroup() == currentProfileTargetGroup || !profiles[i]->originatingGlobalExec())
104 (profiles[i].get()->*function)(callIdentifier);
105 }
106}
107
108void Profiler::willExecute(ExecState* exec, JSValue function)
109{
110 ASSERT(!m_currentProfiles.isEmpty());
111
112 dispatchFunctionToProfiles(profiles: m_currentProfiles, function: &ProfileGenerator::willExecute, callIdentifier: createCallIdentifier(exec, function, sourceURL: "", lineNumber: 0), currentProfileTargetGroup: exec->lexicalGlobalObject()->profileGroup());
113}
114
115void Profiler::willExecute(ExecState* exec, const UString& sourceURL, int startingLineNumber)
116{
117 ASSERT(!m_currentProfiles.isEmpty());
118
119 CallIdentifier callIdentifier = createCallIdentifier(exec, JSValue(), sourceURL, lineNumber: startingLineNumber);
120
121 dispatchFunctionToProfiles(profiles: m_currentProfiles, function: &ProfileGenerator::willExecute, callIdentifier, currentProfileTargetGroup: exec->lexicalGlobalObject()->profileGroup());
122}
123
124void Profiler::didExecute(ExecState* exec, JSValue function)
125{
126 ASSERT(!m_currentProfiles.isEmpty());
127
128 dispatchFunctionToProfiles(profiles: m_currentProfiles, function: &ProfileGenerator::didExecute, callIdentifier: createCallIdentifier(exec, function, sourceURL: "", lineNumber: 0), currentProfileTargetGroup: exec->lexicalGlobalObject()->profileGroup());
129}
130
131void Profiler::didExecute(ExecState* exec, const UString& sourceURL, int startingLineNumber)
132{
133 ASSERT(!m_currentProfiles.isEmpty());
134
135 dispatchFunctionToProfiles(profiles: m_currentProfiles, function: &ProfileGenerator::didExecute, callIdentifier: createCallIdentifier(exec, JSValue(), sourceURL, lineNumber: startingLineNumber), currentProfileTargetGroup: exec->lexicalGlobalObject()->profileGroup());
136}
137
138CallIdentifier Profiler::createCallIdentifier(ExecState* exec, JSValue functionValue, const UString& defaultSourceURL, int defaultLineNumber)
139{
140 if (!functionValue)
141 return CallIdentifier(GlobalCodeExecution, defaultSourceURL, defaultLineNumber);
142 if (!functionValue.isObject())
143 return CallIdentifier("(unknown)", defaultSourceURL, defaultLineNumber);
144 if (asObject(value: functionValue)->inherits(info: &JSFunction::info)) {
145 JSFunction* function = asFunction(value: functionValue);
146 if (!function->executable()->isHostFunction())
147 return createCallIdentifierFromFunctionImp(exec, function);
148 }
149 if (asObject(value: functionValue)->inherits(info: &InternalFunction::info))
150 return CallIdentifier(static_cast<InternalFunction*>(asObject(value: functionValue))->name(exec), defaultSourceURL, defaultLineNumber);
151 return CallIdentifier(makeString(string1: "(", string2: asObject(value: functionValue)->className(), string3: " object)"), defaultSourceURL, defaultLineNumber);
152}
153
154CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSFunction* function)
155{
156 ASSERT(!function->isHostFunction());
157 const UString& name = function->calculatedDisplayName(exec);
158 return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, function->jsExecutable()->sourceURL(), function->jsExecutable()->lineNo());
159}
160
161} // namespace JSC
162

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/profiler/Profiler.cpp