profiler/LegacyProfiler.cpp

   1 /*
   2  * Copyright (C) 2008, 2012 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 "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 "Operations.h"
  40 #include "Profile.h"
  41 #include "ProfileGenerator.h"
  42 #include "ProfileNode.h"
  43 #include <stdio.h>
  44
  45 namespace JSC {
  46
  47 static const char* GlobalCodeExecution = "(program)";
  48 static const char* AnonymousFunction = "(anonymous function)";
  49 static unsigned ProfilesUID = 0;
  50
  51 static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSObject*, const String& defaultSourceURL, int defaultLineNumber);
  52
  53 LegacyProfiler* LegacyProfiler::s_sharedLegacyProfiler = 0;
  54
  55 LegacyProfiler* LegacyProfiler::profiler()
  56 {
  57     if (!s_sharedLegacyProfiler)
  58         s_sharedLegacyProfiler = new LegacyProfiler();
  59     return s_sharedLegacyProfiler;
  60 }
  61
  62 void LegacyProfiler::startProfiling(ExecState* exec, const String& title)
  63 {
  64     ASSERT_ARG(title, !title.isNull());
  65
  66     if (!exec)
  67         return;
  68
  69     // Check if we currently have a Profile for this global ExecState and title.
  70     // If so return early and don't create a new Profile.
  71     JSGlobalObject* origin = exec->lexicalGlobalObject();
  72
  73     for (size_t i = 0; i < m_currentProfiles.size(); ++i) {
  74         ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
  75         if (profileGenerator->origin() == origin && profileGenerator->title() == title)
  76             return;
  77     }
  78
  79     exec->vm().m_enabledProfiler = this;
  80     RefPtr<ProfileGenerator> profileGenerator = ProfileGenerator::create(exec, title, ++ProfilesUID);
  81     m_currentProfiles.append(profileGenerator);
  82 }
  83
  84 PassRefPtr<Profile> LegacyProfiler::stopProfiling(ExecState* exec, const String& title)
  85 {
  86     if (!exec)
  87         return 0;
  88
  89     JSGlobalObject* origin = exec->lexicalGlobalObject();
  90     for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
  91         ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
  92         if (profileGenerator->origin() == origin && (title.isNull() || profileGenerator->title() == title)) {
  93             profileGenerator->stopProfiling();
  94             RefPtr<Profile> returnProfile = profileGenerator->profile();
  95
  96             m_currentProfiles.remove(i);
  97             if (!m_currentProfiles.size())
  98                 exec->vm().m_enabledProfiler = 0;
  99
 100             return returnProfile;
 101         }
 102     }
 103
 104     return 0;
 105 }
 106
 107 void LegacyProfiler::stopProfiling(JSGlobalObject* origin)
 108 {
 109     for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
 110         ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
 111         if (profileGenerator->origin() == origin) {
 112             profileGenerator->stopProfiling();
 113             m_currentProfiles.remove(i);
 114             if (!m_currentProfiles.size())
 115                 origin->vm().m_enabledProfiler = 0;
 116         }
 117     }
 118 }
 119
 120 static inline void dispatchFunctionToProfiles(ExecState* callerOrHandlerCallFrame, const Vector<RefPtr<ProfileGenerator> >& profiles, ProfileGenerator::ProfileFunction function, const CallIdentifier& callIdentifier, unsigned currentProfileTargetGroup)
 121 {
 122     for (size_t i = 0; i < profiles.size(); ++i) {
 123         if (profiles[i]->profileGroup() == currentProfileTargetGroup || !profiles[i]->origin())
 124             (profiles[i].get()->*function)(callerOrHandlerCallFrame, callIdentifier);
 125     }
 126 }
 127
 128 void LegacyProfiler::willExecute(ExecState* callerCallFrame, JSValue function)
 129 {
 130     ASSERT(!m_currentProfiles.isEmpty());
 131
 132     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(callerCallFrame, function, "", 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
 133 }
 134
 135 void LegacyProfiler::willExecute(ExecState* callerCallFrame, const String& sourceURL, int startingLineNumber)
 136 {
 137     ASSERT(!m_currentProfiles.isEmpty());
 138
 139     CallIdentifier callIdentifier = createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber);
 140
 141     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, callIdentifier, callerCallFrame->lexicalGlobalObject()->profileGroup());
 142 }
 143
 144 void LegacyProfiler::didExecute(ExecState* callerCallFrame, JSValue function)
 145 {
 146     ASSERT(!m_currentProfiles.isEmpty());
 147
 148     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, function, "", 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
 149 }
 150
 151 void LegacyProfiler::didExecute(ExecState* callerCallFrame, const String& sourceURL, int startingLineNumber)
 152 {
 153     ASSERT(!m_currentProfiles.isEmpty());
 154
 155     dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber), callerCallFrame->lexicalGlobalObject()->profileGroup());
 156 }
 157
 158 void LegacyProfiler::exceptionUnwind(ExecState* handlerCallFrame)
 159 {
 160     ASSERT(!m_currentProfiles.isEmpty());
 161
 162     dispatchFunctionToProfiles(handlerCallFrame, m_currentProfiles, &ProfileGenerator::exceptionUnwind, createCallIdentifier(handlerCallFrame, JSValue(), "", 0), handlerCallFrame->lexicalGlobalObject()->profileGroup());
 163 }
 164
 165 CallIdentifier LegacyProfiler::createCallIdentifier(ExecState* exec, JSValue functionValue, const String& defaultSourceURL, int defaultLineNumber)
 166 {
 167     if (!functionValue)
 168         return CallIdentifier(GlobalCodeExecution, defaultSourceURL, defaultLineNumber);
 169     if (!functionValue.isObject())
 170         return CallIdentifier("(unknown)", defaultSourceURL, defaultLineNumber);
 171     if (asObject(functionValue)->inherits(&JSFunction::s_info) || asObject(functionValue)->inherits(&InternalFunction::s_info))
 172         return createCallIdentifierFromFunctionImp(exec, asObject(functionValue), defaultSourceURL, defaultLineNumber);
 173     return CallIdentifier(makeString("(", asObject(functionValue)->methodTable()->className(asObject(functionValue)), " object)"), defaultSourceURL, defaultLineNumber);
 174 }
 175
 176 CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSObject* function, const String& defaultSourceURL, int defaultLineNumber)
 177 {
 178     const String& name = getCalculatedDisplayName(exec, function);
 179     JSFunction* jsFunction = jsDynamicCast<JSFunction*>(function);
 180     if (jsFunction && !jsFunction->isHostFunction())
 181         return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, jsFunction->jsExecutable()->sourceURL(), jsFunction->jsExecutable()->lineNo());
 182     return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, defaultSourceURL, defaultLineNumber);
 183 }
 184
 185 } // namespace JSC