/*

 * Copyright (C) 2008 Apple Inc. All Rights Reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "ProfileGenerator.h"

#include "CallFrame.h"

#include "CodeBlock.h"

#include "JSGlobalObject.h"

#include "JSStringRef.h"

#include "JSFunction.h"

#include "Interpreter.h"

#include "Profile.h"

#include "Profiler.h"

#include "Tracing.h"

namespace JSC {

static const char* NonJSExecution = "(idle)";

PassRefPtr<ProfileGenerator> ProfileGenerator::create(const UString& title, ExecState* originatingExec, unsigned uid)

{

    return adoptRef(new ProfileGenerator(title, originatingExec, uid));

}

ProfileGenerator::ProfileGenerator(const UString& title, ExecState* originatingExec, unsigned uid)

    : m_originatingGlobalExec(originatingExec ? originatingExec->lexicalGlobalObject()->globalExec() : 0)

    , m_profileGroup(originatingExec ? originatingExec->lexicalGlobalObject()->profileGroup() : 0)

{

    m_profile = Profile::create(title, uid);

    m_currentNode = m_head = m_profile->head();

    if (originatingExec)

        addParentForConsoleStart(originatingExec);

}

void ProfileGenerator::addParentForConsoleStart(ExecState* exec)

{

    int lineNumber;

    intptr_t sourceID;

    UString sourceURL;

    JSValue function;

    exec->interpreter()->retrieveLastCaller(exec, lineNumber, sourceID, sourceURL, function);

    m_currentNode = ProfileNode::create(Profiler::createCallIdentifier(exec, function ? function.toThisObject(exec) : 0, sourceURL, lineNumber), m_head.get(), m_head.get());

    m_head->insertNode(m_currentNode.get());

}

const UString& ProfileGenerator::title() const

{

    return m_profile->title();

}

void ProfileGenerator::willExecute(const CallIdentifier& callIdentifier)

{

    if (JAVASCRIPTCORE_PROFILE_WILL_EXECUTE_ENABLED()) {

        CString name = callIdentifier.m_name.UTF8String();

        CString url = callIdentifier.m_url.UTF8String();

        JAVASCRIPTCORE_PROFILE_WILL_EXECUTE(m_profileGroup, const_cast<char*>(name.data()), const_cast<char*>(url.data()), callIdentifier.m_lineNumber);

    }

    if (!m_originatingGlobalExec)

        return;

    ASSERT_ARG(m_currentNode, m_currentNode);

    m_currentNode = m_currentNode->willExecute(callIdentifier);

}

void ProfileGenerator::didExecute(const CallIdentifier& callIdentifier)

{

    if (JAVASCRIPTCORE_PROFILE_DID_EXECUTE_ENABLED()) {

        CString name = callIdentifier.m_name.UTF8String();

        CString url = callIdentifier.m_url.UTF8String();

        JAVASCRIPTCORE_PROFILE_DID_EXECUTE(m_profileGroup, const_cast<char*>(name.data()), const_cast<char*>(url.data()), callIdentifier.m_lineNumber);

    }

    if (!m_originatingGlobalExec)

        return;

    ASSERT_ARG(m_currentNode, m_currentNode);

    if (m_currentNode->callIdentifier() != callIdentifier) {

        RefPtr<ProfileNode> returningNode = ProfileNode::create(callIdentifier, m_head.get(), m_currentNode.get());

        returningNode->setStartTime(m_currentNode->startTime());

        returningNode->didExecute();

        m_currentNode->insertNode(returningNode.release());

        return;

    }

    m_currentNode = m_currentNode->didExecute();

}

void ProfileGenerator::stopProfiling()

{

    m_profile->forEach(&ProfileNode::stopProfiling);

    removeProfileStart();

    removeProfileEnd();

    ASSERT_ARG(m_currentNode, m_currentNode);

    // Set the current node to the parent, because we are in a call that

    // will not get didExecute call.

    m_currentNode = m_currentNode->parent();

   if (double headSelfTime = m_head->selfTime()) {

        RefPtr<ProfileNode> idleNode = ProfileNode::create(CallIdentifier(NonJSExecution, UString(), 0), m_head.get(), m_head.get());

        idleNode->setTotalTime(headSelfTime);

        idleNode->setSelfTime(headSelfTime);

        idleNode->setVisible(true);

        m_head->setSelfTime(0.0);

        m_head->addChild(idleNode.release());

    }

}

// The console.ProfileGenerator that started this ProfileGenerator will be the first child.

void ProfileGenerator::removeProfileStart()

{

    ProfileNode* currentNode = 0;

    for (ProfileNode* next = m_head.get(); next; next = next->firstChild())

        currentNode = next;

    if (currentNode->callIdentifier().m_name != "profile")

        return;

    // Attribute the time of the node aobut to be removed to the self time of its parent

    currentNode->parent()->setSelfTime(currentNode->parent()->selfTime() + currentNode->totalTime());

    currentNode->parent()->removeChild(currentNode);

}

// The console.ProfileGeneratorEnd that stopped this ProfileGenerator will be the last child.

void ProfileGenerator::removeProfileEnd()

{

    ProfileNode* currentNode = 0;

    for (ProfileNode* next = m_head.get(); next; next = next->lastChild())

        currentNode = next;

    if (currentNode->callIdentifier().m_name != "profileEnd")

        return;

    // Attribute the time of the node aobut to be removed to the self time of its parent

    currentNode->parent()->setSelfTime(currentNode->parent()->selfTime() + currentNode->totalTime());

    ASSERT(currentNode->callIdentifier() == (currentNode->parent()->children()[currentNode->parent()->children().size() - 1])->callIdentifier());

    currentNode->parent()->removeChild(currentNode);

}

} // namespace JSC