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