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 "InternalFunction.h"
36 #include "JSFunction.h"
37 #include "JSGlobalObject.h"
38 #include "Nodes.h"
39 #include "Profile.h"
40 #include "ProfileGenerator.h"
41 #include "ProfileNode.h"
42 #include "UStringConcatenate.h"
43 #include <stdio.h>
44
45 namespace JSC {
46
47 static const char* GlobalCodeExecution = "(program)";
48 static const char* AnonymousFunction = "(anonymous function)";
49 static unsigned ProfilesUID = 0;
50
51 static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSFunction*);
52
53 Profiler* Profiler::s_sharedProfiler = 0;
54 Profiler* Profiler::s_sharedEnabledProfilerReference = 0;
55
profiler()56 Profiler* Profiler::profiler()
57 {
58 if (!s_sharedProfiler)
59 s_sharedProfiler = new Profiler();
60 return s_sharedProfiler;
61 }
62
startProfiling(ExecState * exec,const UString & title)63 void Profiler::startProfiling(ExecState* exec, const UString& title)
64 {
65 ASSERT_ARG(title, !title.isNull());
66
67 // Check if we currently have a Profile for this global ExecState and title.
68 // If so return early and don't create a new Profile.
69 JSGlobalObject* origin = exec ? exec->lexicalGlobalObject() : 0;
70
71 for (size_t i = 0; i < m_currentProfiles.size(); ++i) {
72 ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
73 if (profileGenerator->origin() == origin && profileGenerator->title() == title)
74 return;
75 }
76
77 s_sharedEnabledProfilerReference = this;
78 RefPtr<ProfileGenerator> profileGenerator = ProfileGenerator::create(exec, title, ++ProfilesUID);
79 m_currentProfiles.append(profileGenerator);
80 }
81
stopProfiling(ExecState * exec,const UString & title)82 PassRefPtr<Profile> Profiler::stopProfiling(ExecState* exec, const UString& title)
83 {
84 JSGlobalObject* origin = exec ? exec->lexicalGlobalObject() : 0;
85 for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
86 ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
87 if (profileGenerator->origin() == origin && (title.isNull() || profileGenerator->title() == title)) {
88 profileGenerator->stopProfiling();
89 RefPtr<Profile> returnProfile = profileGenerator->profile();
90
91 m_currentProfiles.remove(i);
92 if (!m_currentProfiles.size())
93 s_sharedEnabledProfilerReference = 0;
94
95 return returnProfile;
96 }
97 }
98
99 return 0;
100 }
101
stopProfiling(JSGlobalObject * origin)102 void Profiler::stopProfiling(JSGlobalObject* origin)
103 {
104 for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
105 ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
106 if (profileGenerator->origin() == origin) {
107 profileGenerator->stopProfiling();
108 m_currentProfiles.remove(i);
109 if (!m_currentProfiles.size())
110 s_sharedEnabledProfilerReference = 0;
111 }
112 }
113 }
114
dispatchFunctionToProfiles(ExecState * callerOrHandlerCallFrame,const Vector<RefPtr<ProfileGenerator>> & profiles,ProfileGenerator::ProfileFunction function,const CallIdentifier & callIdentifier,unsigned currentProfileTargetGroup)115 static inline void dispatchFunctionToProfiles(ExecState* callerOrHandlerCallFrame, const Vector<RefPtr<ProfileGenerator> >& profiles, ProfileGenerator::ProfileFunction function, const CallIdentifier& callIdentifier, unsigned currentProfileTargetGroup)
116 {
117 for (size_t i = 0; i < profiles.size(); ++i) {
118 if (profiles[i]->profileGroup() == currentProfileTargetGroup || !profiles[i]->origin())
119 (profiles[i].get()->*function)(callerOrHandlerCallFrame, callIdentifier);
120 }
121 }
122
willExecute(ExecState * callerCallFrame,JSValue function)123 void Profiler::willExecute(ExecState* callerCallFrame, JSValue function)
124 {
125 ASSERT(!m_currentProfiles.isEmpty());
126
127 dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(callerCallFrame, function, "", 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
128 }
129
willExecute(ExecState * callerCallFrame,const UString & sourceURL,int startingLineNumber)130 void Profiler::willExecute(ExecState* callerCallFrame, const UString& sourceURL, int startingLineNumber)
131 {
132 ASSERT(!m_currentProfiles.isEmpty());
133
134 CallIdentifier callIdentifier = createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber);
135
136 dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, callIdentifier, callerCallFrame->lexicalGlobalObject()->profileGroup());
137 }
138
didExecute(ExecState * callerCallFrame,JSValue function)139 void Profiler::didExecute(ExecState* callerCallFrame, JSValue function)
140 {
141 ASSERT(!m_currentProfiles.isEmpty());
142
143 dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, function, "", 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
144 }
145
didExecute(ExecState * callerCallFrame,const UString & sourceURL,int startingLineNumber)146 void Profiler::didExecute(ExecState* callerCallFrame, const UString& sourceURL, int startingLineNumber)
147 {
148 ASSERT(!m_currentProfiles.isEmpty());
149
150 dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber), callerCallFrame->lexicalGlobalObject()->profileGroup());
151 }
152
exceptionUnwind(ExecState * handlerCallFrame)153 void Profiler::exceptionUnwind(ExecState* handlerCallFrame)
154 {
155 ASSERT(!m_currentProfiles.isEmpty());
156
157 dispatchFunctionToProfiles(handlerCallFrame, m_currentProfiles, &ProfileGenerator::exceptionUnwind, createCallIdentifier(handlerCallFrame, JSValue(), "", 0), handlerCallFrame->lexicalGlobalObject()->profileGroup());
158 }
159
createCallIdentifier(ExecState * exec,JSValue functionValue,const UString & defaultSourceURL,int defaultLineNumber)160 CallIdentifier Profiler::createCallIdentifier(ExecState* exec, JSValue functionValue, const UString& defaultSourceURL, int defaultLineNumber)
161 {
162 if (!functionValue)
163 return CallIdentifier(GlobalCodeExecution, defaultSourceURL, defaultLineNumber);
164 if (!functionValue.isObject())
165 return CallIdentifier("(unknown)", defaultSourceURL, defaultLineNumber);
166 if (asObject(functionValue)->inherits(&JSFunction::s_info)) {
167 JSFunction* function = asFunction(functionValue);
168 if (!function->executable()->isHostFunction())
169 return createCallIdentifierFromFunctionImp(exec, function);
170 }
171 if (asObject(functionValue)->inherits(&JSFunction::s_info))
172 return CallIdentifier(static_cast<JSFunction*>(asObject(functionValue))->name(exec), defaultSourceURL, defaultLineNumber);
173 if (asObject(functionValue)->inherits(&InternalFunction::s_info))
174 return CallIdentifier(static_cast<InternalFunction*>(asObject(functionValue))->name(exec), defaultSourceURL, defaultLineNumber);
175 return CallIdentifier(makeUString("(", asObject(functionValue)->className(), " object)"), defaultSourceURL, defaultLineNumber);
176 }
177
createCallIdentifierFromFunctionImp(ExecState * exec,JSFunction * function)178 CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSFunction* function)
179 {
180 ASSERT(!function->isHostFunction());
181 const UString& name = function->calculatedDisplayName(exec);
182 return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, function->jsExecutable()->sourceURL(), function->jsExecutable()->lineNo());
183 }
184
185 } // namespace JSC
186