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