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 45namespace JSC { 46 47static const char* GlobalCodeExecution = "(program)"; 48static const char* AnonymousFunction = "(anonymous function)"; 49static unsigned ProfilesUID = 0; 50 51static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSFunction*); 52 53Profiler* Profiler::s_sharedProfiler = 0; 54Profiler* Profiler::s_sharedEnabledProfilerReference = 0; 55 56Profiler* Profiler::profiler() 57{ 58 if (!s_sharedProfiler) 59 s_sharedProfiler = new Profiler(); 60 return s_sharedProfiler; 61} 62 63void 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 82PassRefPtr<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 102void 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 115static 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 123void 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 130void 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 139void 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 146void 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 153void 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 160CallIdentifier 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 178CallIdentifier 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