profiler/ProfileGenerator.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  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "ProfileGenerator.h"
  28
  29 #include "CallFrame.h"
  30 #include "CodeBlock.h"
  31 #include "JSGlobalObject.h"
  32 #include "JSStringRef.h"
  33 #include "JSFunction.h"
  34 #include "Interpreter.h"
  35 #include "LegacyProfiler.h"
  36 #include "Operations.h"
  37 #include "Profile.h"
  38 #include "Tracing.h"
  39
  40 namespace JSC {
  41
  42 static const char* NonJSExecution = "(idle)";
  43
  44 PassRefPtr<ProfileGenerator> ProfileGenerator::create(ExecState* exec, const String& title, unsigned uid)
  45 {
  46     return adoptRef(new ProfileGenerator(exec, title, uid));
  47 }
  48
  49 ProfileGenerator::ProfileGenerator(ExecState* exec, const String& title, unsigned uid)
  50     : m_origin(exec ? exec->lexicalGlobalObject() : 0)
  51     , m_profileGroup(exec ? exec->lexicalGlobalObject()->profileGroup() : 0)
  52 {
  53     m_profile = Profile::create(title, uid);
  54     m_currentNode = m_head = m_profile->head();
  55     if (exec)
  56         addParentForConsoleStart(exec);
  57 }
  58
  59 void ProfileGenerator::addParentForConsoleStart(ExecState* exec)
  60 {
  61     int lineNumber;
  62     intptr_t sourceID;
  63     String sourceURL;
  64     JSValue function;
  65
  66     exec->interpreter()->retrieveLastCaller(exec, lineNumber, sourceID, sourceURL, function);
  67     m_currentNode = ProfileNode::create(exec, LegacyProfiler::createCallIdentifier(exec, function ? function.toThisObject(exec) : 0, sourceURL, lineNumber), m_head.get(), m_head.get());
  68     m_head->insertNode(m_currentNode.get());
  69 }
  70
  71 const String& ProfileGenerator::title() const
  72 {
  73     return m_profile->title();
  74 }
  75
  76 void ProfileGenerator::willExecute(ExecState* callerCallFrame, const CallIdentifier& callIdentifier)
  77 {
  78     if (JAVASCRIPTCORE_PROFILE_WILL_EXECUTE_ENABLED()) {
  79         CString name = callIdentifier.m_name.utf8();
  80         CString url = callIdentifier.m_url.utf8();
  81         JAVASCRIPTCORE_PROFILE_WILL_EXECUTE(m_profileGroup, const_cast<char*>(name.data()), const_cast<char*>(url.data()), callIdentifier.m_lineNumber);
  82     }
  83
  84     if (!m_origin)
  85         return;
  86
  87     ASSERT(m_currentNode);
  88     m_currentNode = m_currentNode->willExecute(callerCallFrame, callIdentifier);
  89 }
  90
  91 void ProfileGenerator::didExecute(ExecState* callerCallFrame, const CallIdentifier& callIdentifier)
  92 {
  93     if (JAVASCRIPTCORE_PROFILE_DID_EXECUTE_ENABLED()) {
  94         CString name = callIdentifier.m_name.utf8();
  95         CString url = callIdentifier.m_url.utf8();
  96         JAVASCRIPTCORE_PROFILE_DID_EXECUTE(m_profileGroup, const_cast<char*>(name.data()), const_cast<char*>(url.data()), callIdentifier.m_lineNumber);
  97     }
  98
  99     if (!m_origin)
 100         return;
 101
 102     ASSERT(m_currentNode);
 103     if (m_currentNode->callIdentifier() != callIdentifier) {
 104         RefPtr<ProfileNode> returningNode = ProfileNode::create(callerCallFrame, callIdentifier, m_head.get(), m_currentNode.get());
 105         returningNode->setStartTime(m_currentNode->startTime());
 106         returningNode->didExecute();
 107         m_currentNode->insertNode(returningNode.release());
 108         return;
 109     }
 110
 111     m_currentNode = m_currentNode->didExecute();
 112 }
 113
 114 void ProfileGenerator::exceptionUnwind(ExecState* handlerCallFrame, const CallIdentifier&)
 115 {
 116     // If the current node was called by the handler (==) or any
 117     // more nested function (>) the we have exited early from it.
 118     ASSERT(m_currentNode);
 119     while (m_currentNode->callerCallFrame() >= handlerCallFrame) {
 120         didExecute(m_currentNode->callerCallFrame(), m_currentNode->callIdentifier());
 121         ASSERT(m_currentNode);
 122     }
 123 }
 124
 125 void ProfileGenerator::stopProfiling()
 126 {
 127     m_profile->forEach(&ProfileNode::stopProfiling);
 128
 129     removeProfileStart();
 130     removeProfileEnd();
 131
 132     ASSERT(m_currentNode);
 133
 134     // Set the current node to the parent, because we are in a call that
 135     // will not get didExecute call.
 136     m_currentNode = m_currentNode->parent();
 137
 138    if (double headSelfTime = m_head->selfTime()) {
 139         RefPtr<ProfileNode> idleNode = ProfileNode::create(0, CallIdentifier(NonJSExecution, String(), 0), m_head.get(), m_head.get());
 140
 141         idleNode->setTotalTime(headSelfTime);
 142         idleNode->setSelfTime(headSelfTime);
 143         idleNode->setVisible(true);
 144
 145         m_head->setSelfTime(0.0);
 146         m_head->addChild(idleNode.release());
 147     }
 148 }
 149
 150 // The console.ProfileGenerator that started this ProfileGenerator will be the first child.
 151 void ProfileGenerator::removeProfileStart()
 152 {
 153     ProfileNode* currentNode = 0;
 154     for (ProfileNode* next = m_head.get(); next; next = next->firstChild())
 155         currentNode = next;
 156
 157     if (currentNode->callIdentifier().m_name != "profile")
 158         return;
 159
 160     // Attribute the time of the node aobut to be removed to the self time of its parent
 161     currentNode->parent()->setSelfTime(currentNode->parent()->selfTime() + currentNode->totalTime());
 162     currentNode->parent()->removeChild(currentNode);
 163 }
 164
 165 // The console.ProfileGeneratorEnd that stopped this ProfileGenerator will be the last child.
 166 void ProfileGenerator::removeProfileEnd()
 167 {
 168     ProfileNode* currentNode = 0;
 169     for (ProfileNode* next = m_head.get(); next; next = next->lastChild())
 170         currentNode = next;
 171
 172     if (currentNode->callIdentifier().m_name != "profileEnd")
 173         return;
 174
 175     // Attribute the time of the node aobut to be removed to the self time of its parent
 176     currentNode->parent()->setSelfTime(currentNode->parent()->selfTime() + currentNode->totalTime());
 177
 178     ASSERT(currentNode->callIdentifier() == (currentNode->parent()->children()[currentNode->parent()->children().size() - 1])->callIdentifier());
 179     currentNode->parent()->removeChild(currentNode);
 180 }
 181
 182 } // namespace JSC