profiler/Profiler.cpp

   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
  43 namespace JSC {
  44
  45 static const char* GlobalCodeExecution = "(program)";
  46 static const char* AnonymousFunction = "(anonymous function)";
  47 static unsigned ProfilesUID = 0;
  48
  49 static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSFunction*);
  50
  51 Profiler* Profiler::s_sharedProfiler = 0;
  52 Profiler* Profiler::s_sharedEnabledProfilerReference = 0;
  53
  54 Profiler* Profiler::profiler()
  55 {
  56     if (!s_sharedProfiler)
  57         s_sharedProfiler = new Profiler();
  58     return s_sharedProfiler;
  59 }
  60
  61 void 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, exec, ++ProfilesUID);
  77     m_currentProfiles.append(profileGenerator);
  78 }
  79
  80 PassRefPtr<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(i);
  90             if (!m_currentProfiles.size())
  91                 s_sharedEnabledProfilerReference = 0;
  92
  93             return returnProfile;
  94         }
  95     }
  96
  97     return 0;
  98 }
  99
 100 static 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
 108 void Profiler::willExecute(ExecState* exec, JSValue function)
 109 {
 110     ASSERT(!m_currentProfiles.isEmpty());
 111
 112     dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(exec, function, "", 0), exec->lexicalGlobalObject()->profileGroup());
 113 }
 114
 115 void Profiler::willExecute(ExecState* exec, const UString& sourceURL, int startingLineNumber)
 116 {
 117     ASSERT(!m_currentProfiles.isEmpty());
 118
 119     CallIdentifier callIdentifier = createCallIdentifier(exec, JSValue(), sourceURL, startingLineNumber);
 120
 121     dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::willExecute, callIdentifier, exec->lexicalGlobalObject()->profileGroup());
 122 }
 123
 124 void Profiler::didExecute(ExecState* exec, JSValue function)
 125 {
 126     ASSERT(!m_currentProfiles.isEmpty());
 127
 128     dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(exec, function, "", 0), exec->lexicalGlobalObject()->profileGroup());
 129 }
 130
 131 void Profiler::didExecute(ExecState* exec, const UString& sourceURL, int startingLineNumber)
 132 {
 133     ASSERT(!m_currentProfiles.isEmpty());
 134
 135     dispatchFunctionToProfiles(m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(exec, JSValue(), sourceURL, startingLineNumber), exec->lexicalGlobalObject()->profileGroup());
 136 }
 137
 138 CallIdentifier 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(functionValue)->inherits(&JSFunction::info)) {
 145         JSFunction* function = asFunction(functionValue);
 146         if (!function->executable()->isHostFunction())
 147             return createCallIdentifierFromFunctionImp(exec, function);
 148     }
 149     if (asObject(functionValue)->inherits(&InternalFunction::info))
 150         return CallIdentifier(static_cast<InternalFunction*>(asObject(functionValue))->name(exec), defaultSourceURL, defaultLineNumber);
 151     return CallIdentifier(makeString("(", asObject(functionValue)->className(), " object)"), defaultSourceURL, defaultLineNumber);
 152 }
 153
 154 CallIdentifier 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