profiler/LegacyProfiler.cpp

   1 /*
   2  * Copyright (C) 2008, 2012, 2014 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 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 "LegacyProfiler.h"
  31
  32 #include "CallFrame.h"
  33 #include "CodeBlock.h"
  34 #include "CommonIdentifiers.h"
  35 #include "InternalFunction.h"
  36 #include "JSFunction.h"
  37 #include "JSGlobalObject.h"
  38 #include "Nodes.h"
  39 #include "JSCInlines.h"
  40 #include "Profile.h"
  41 #include "ProfileGenerator.h"
  42 #include "ProfileNode.h"
  43
  44 namespace JSC {
  45
  46 static const char* GlobalCodeExecution = "(program)";
  47 static const char* AnonymousFunction = "(anonymous function)";
  48 static unsigned ProfilesUID = 0;
  49
  50 static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSObject*, const String& defaultSourceURL, unsigned defaultLineNumber, unsigned defaultColumnNumber);
  51
  52 LegacyProfiler* LegacyProfiler::s_sharedLegacyProfiler = 0;
  53
  54 LegacyProfiler* LegacyProfiler::profiler()
  55 {
  56     if (!s_sharedLegacyProfiler)
  57         s_sharedLegacyProfiler = new LegacyProfiler();
  58     return s_sharedLegacyProfiler;
  59 }
  60
  61 void LegacyProfiler::startProfiling(ExecState* exec, const String& title)
  62 {
  63     if (!exec)
  64         return;
  65
  66     // Check if we currently have a Profile for this global ExecState and title.
  67     // If so return early and don't create a new Profile.
  68     JSGlobalObject* origin = exec->lexicalGlobalObject();
  69
  70     for (size_t i = 0; i < m_currentProfiles.size(); ++i) {
  71         ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
  72         if (profileGenerator->origin() == origin && profileGenerator->title() == title)
  73             return;
  74     }
  75
  76     exec->vm().setEnabledProfiler(this);
  77     RefPtr<ProfileGenerator> profileGenerator = ProfileGenerator::create(exec, title, ++ProfilesUID);
  78     m_currentProfiles.append(profileGenerator);
  79 }
  80
  81 PassRefPtr<Profile> LegacyProfiler::stopProfiling(ExecState* exec, const String& title)
  82 {
  83     if (!exec)
  84         return 0;
  85
  86     JSGlobalObject* origin = exec->lexicalGlobalObject();
  87     for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
  88         ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
  89         if (profileGenerator->origin() == origin && (title.isNull() || profileGenerator->title() == title)) {
  90             profileGenerator->stopProfiling();
  91             RefPtr<Profile> returnProfile = profileGenerator->profile();
  92
  93             m_currentProfiles.remove(i);
  94             if (!m_currentProfiles.size())
  95                 exec->vm().setEnabledProfiler(nullptr);
  96
  97             return returnProfile;
  98         }
  99     }
 100
 101     return 0;
 102 }
 103
 104 void LegacyProfiler::stopProfiling(JSGlobalObject* origin)
 105 {
 106     for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
 107         ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
 108         if (profileGenerator->origin() == origin) {
 109             profileGenerator->stopProfiling();
 110             m_currentProfiles.remove(i);
 111             if (!m_currentProfiles.size())
 112                 origin->vm().setEnabledProfiler(nullptr);
 113         }
 114     }
 115 }
 116
 117 static inline void dispatchFunctionToProfiles(ExecState* callerOrHandlerCallFrame, const Vector<RefPtr<ProfileGenerator>>& profiles, ProfileGenerator::ProfileFunction function, const CallIdentifier& callIdentifier, unsigned currentProfileTargetGroup)
 118 {
 119     for (size_t i = 0; i < profiles.size(); ++i) {
 120         if (profiles[i]->profileGroup() == currentProfileTargetGroup || !profiles[i]->origin())
 121             (profiles[i].get()->*function)(callerOrHandlerCallFrame, callIdentifier);
 122     }
 123 }
 124
 125 void LegacyProfiler::willExecute(ExecState* callerCallFrame, JSValue function)
 126 {
 127     ASSERT(!m_currentProfiles.isEmpty());
 128
 129     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(callerCallFrame, function, StringImpl::empty(), 0, 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
 130 }
 131
 132 void LegacyProfiler::willExecute(ExecState* callerCallFrame, const String& sourceURL, unsigned startingLineNumber, unsigned startingColumnNumber)
 133 {
 134     ASSERT(!m_currentProfiles.isEmpty());
 135
 136     CallIdentifier callIdentifier = createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber, startingColumnNumber);
 137
 138     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, callIdentifier, callerCallFrame->lexicalGlobalObject()->profileGroup());
 139 }
 140
 141 void LegacyProfiler::didExecute(ExecState* callerCallFrame, JSValue function)
 142 {
 143     ASSERT(!m_currentProfiles.isEmpty());
 144
 145     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, function, StringImpl::empty(), 0, 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
 146 }
 147
 148 void LegacyProfiler::didExecute(ExecState* callerCallFrame, const String& sourceURL, unsigned startingLineNumber, unsigned startingColumnNumber)
 149 {
 150     ASSERT(!m_currentProfiles.isEmpty());
 151
 152     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber, startingColumnNumber), callerCallFrame->lexicalGlobalObject()->profileGroup());
 153 }
 154
 155 void LegacyProfiler::exceptionUnwind(ExecState* handlerCallFrame)
 156 {
 157     ASSERT(!m_currentProfiles.isEmpty());
 158
 159     dispatchFunctionToProfiles(handlerCallFrame, m_currentProfiles, &ProfileGenerator::exceptionUnwind, createCallIdentifier(handlerCallFrame, JSValue(), StringImpl::empty(), 0, 0), handlerCallFrame->lexicalGlobalObject()->profileGroup());
 160 }
 161
 162 CallIdentifier LegacyProfiler::createCallIdentifier(ExecState* exec, JSValue functionValue, const String& defaultSourceURL, unsigned defaultLineNumber, unsigned defaultColumnNumber)
 163 {
 164     if (!functionValue)
 165         return CallIdentifier(ASCIILiteral(GlobalCodeExecution), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
 166     if (!functionValue.isObject())
 167         return CallIdentifier(ASCIILiteral("(unknown)"), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
 168     if (asObject(functionValue)->inherits(JSFunction::info()) || asObject(functionValue)->inherits(InternalFunction::info()))
 169         return createCallIdentifierFromFunctionImp(exec, asObject(functionValue), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
 170     return CallIdentifier(asObject(functionValue)->methodTable()->className(asObject(functionValue)), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
 171 }
 172
 173 CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSObject* function, const String& defaultSourceURL, unsigned defaultLineNumber, unsigned defaultColumnNumber)
 174 {
 175     const String& name = getCalculatedDisplayName(exec, function);
 176     JSFunction* jsFunction = jsDynamicCast<JSFunction*>(function);
 177     if (jsFunction && !jsFunction->isHostOrBuiltinFunction())
 178         return CallIdentifier(name.isEmpty() ? ASCIILiteral(AnonymousFunction) : name, jsFunction->jsExecutable()->sourceURL(), jsFunction->jsExecutable()->lineNo(), jsFunction->jsExecutable()->startColumn());
 179     return CallIdentifier(name.isEmpty() ? ASCIILiteral(AnonymousFunction) : name, defaultSourceURL, defaultLineNumber, defaultColumnNumber);
 180 }
 181
 182 } // namespace JSC