/*

 * 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. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "JSGlobalData.h"

#include "ArgList.h"

#include "Collector.h"

#include "CommonIdentifiers.h"

#include "FunctionConstructor.h"

#include "GetterSetter.h"

#include "Interpreter.h"

#include "JSActivation.h"

#include "JSAPIValueWrapper.h"

#include "JSArray.h"

#include "JSByteArray.h"

#include "JSClassRef.h"

#include "JSFunction.h"

#include "JSLock.h"

#include "JSNotAnObject.h"

#include "JSPropertyNameIterator.h"

#include "JSStaticScopeObject.h"

#include "Lexer.h"

#include "Lookup.h"

#include "Nodes.h"

#include "Parser.h"

#include "RegExpCache.h"

#include <wtf/WTFThreadData.h>

#if ENABLE(JSC_MULTIPLE_THREADS)

#include <wtf/Threading.h>

#endif

#if PLATFORM(MAC)

#include "ProfilerServer.h"

#include <CoreFoundation/CoreFoundation.h>

#endif

using namespace WTF;

namespace JSC {

extern JSC_CONST_HASHTABLE HashTable arrayTable;

extern JSC_CONST_HASHTABLE HashTable jsonTable;

extern JSC_CONST_HASHTABLE HashTable dateTable;

extern JSC_CONST_HASHTABLE HashTable mathTable;

extern JSC_CONST_HASHTABLE HashTable numberTable;

extern JSC_CONST_HASHTABLE HashTable regExpTable;

extern JSC_CONST_HASHTABLE HashTable regExpConstructorTable;

extern JSC_CONST_HASHTABLE HashTable stringTable;

void* JSGlobalData::jsArrayVPtr;

void* JSGlobalData::jsByteArrayVPtr;

void* JSGlobalData::jsStringVPtr;

void* JSGlobalData::jsFunctionVPtr;

void JSGlobalData::storeVPtrs()

{

    CollectorCell cell;

    void* storage = &cell;

    COMPILE_ASSERT(sizeof(JSArray) <= sizeof(CollectorCell), sizeof_JSArray_must_be_less_than_CollectorCell);

    JSCell* jsArray = new (storage) JSArray(JSArray::createStructure(jsNull()));

    JSGlobalData::jsArrayVPtr = jsArray->vptr();

    jsArray->~JSCell();

    COMPILE_ASSERT(sizeof(JSByteArray) <= sizeof(CollectorCell), sizeof_JSByteArray_must_be_less_than_CollectorCell);

    JSCell* jsByteArray = new (storage) JSByteArray(JSByteArray::VPtrStealingHack);

    JSGlobalData::jsByteArrayVPtr = jsByteArray->vptr();

    jsByteArray->~JSCell();

    COMPILE_ASSERT(sizeof(JSString) <= sizeof(CollectorCell), sizeof_JSString_must_be_less_than_CollectorCell);

    JSCell* jsString = new (storage) JSString(JSString::VPtrStealingHack);

    JSGlobalData::jsStringVPtr = jsString->vptr();

    jsString->~JSCell();

    COMPILE_ASSERT(sizeof(JSFunction) <= sizeof(CollectorCell), sizeof_JSFunction_must_be_less_than_CollectorCell);

    JSCell* jsFunction = new (storage) JSFunction(JSFunction::createStructure(jsNull()));

    JSGlobalData::jsFunctionVPtr = jsFunction->vptr();

    jsFunction->~JSCell();

}

JSGlobalData::JSGlobalData(GlobalDataType globalDataType, ThreadStackType threadStackType)

    : globalDataType(globalDataType)

    , clientData(0)

    , arrayTable(fastNew<HashTable>(JSC::arrayTable))

    , dateTable(fastNew<HashTable>(JSC::dateTable))

    , jsonTable(fastNew<HashTable>(JSC::jsonTable))

    , mathTable(fastNew<HashTable>(JSC::mathTable))

    , numberTable(fastNew<HashTable>(JSC::numberTable))

    , regExpTable(fastNew<HashTable>(JSC::regExpTable))

    , regExpConstructorTable(fastNew<HashTable>(JSC::regExpConstructorTable))

    , stringTable(fastNew<HashTable>(JSC::stringTable))

    , activationStructure(JSActivation::createStructure(jsNull()))

    , interruptedExecutionErrorStructure(JSObject::createStructure(jsNull()))

    , terminatedExecutionErrorStructure(JSObject::createStructure(jsNull()))

    , staticScopeStructure(JSStaticScopeObject::createStructure(jsNull()))

    , stringStructure(JSString::createStructure(jsNull()))

    , notAnObjectErrorStubStructure(JSNotAnObjectErrorStub::createStructure(jsNull()))

    , notAnObjectStructure(JSNotAnObject::createStructure(jsNull()))

    , propertyNameIteratorStructure(JSPropertyNameIterator::createStructure(jsNull()))

    , getterSetterStructure(GetterSetter::createStructure(jsNull()))

    , apiWrapperStructure(JSAPIValueWrapper::createStructure(jsNull()))

    , dummyMarkableCellStructure(JSCell::createDummyStructure())

#if USE(JSVALUE32)

    , numberStructure(JSNumberCell::createStructure(jsNull()))

#endif

    , identifierTable(globalDataType == Default ? wtfThreadData().currentIdentifierTable() : createIdentifierTable())

    , propertyNames(new CommonIdentifiers(this))

    , emptyList(new MarkedArgumentBuffer)

    , lexer(new Lexer(this))

    , parser(new Parser)

    , interpreter(new Interpreter)

    , heap(this)

    , head(0)

    , dynamicGlobalObject(0)

    , functionCodeBlockBeingReparsed(0)

    , firstStringifierToMark(0)

    , markStack(jsArrayVPtr)

    , cachedUTCOffset(NaN)

    , weakRandom(static_cast<int>(currentTime()))

    , maxReentryDepth(threadStackType == ThreadStackTypeSmall ? MaxSmallThreadReentryDepth : MaxLargeThreadReentryDepth)

    , m_regExpCache(new RegExpCache(this))

#ifndef NDEBUG

    , exclusiveThread(0)

#endif

{

#if PLATFORM(MAC)

    startProfilerServerIfNeeded();

#endif

#if ENABLE(JIT) && ENABLE(INTERPRETER)

#if PLATFORM(CF)

    CFStringRef canUseJITKey = CFStringCreateWithCString(0 , "JavaScriptCoreUseJIT", kCFStringEncodingMacRoman);

    CFBooleanRef canUseJIT = (CFBooleanRef)CFPreferencesCopyAppValue(canUseJITKey, kCFPreferencesCurrentApplication);

    if (canUseJIT) {

        m_canUseJIT = kCFBooleanTrue == canUseJIT;

        CFRelease(canUseJIT);

    } else

        m_canUseJIT = !getenv("JavaScriptCoreUseJIT");

    CFRelease(canUseJITKey);

#elif OS(UNIX)

    m_canUseJIT = !getenv("JavaScriptCoreUseJIT");

#else

    m_canUseJIT = true;

#endif

#endif

#if ENABLE(JIT)

#if ENABLE(INTERPRETER)

    if (m_canUseJIT)

        m_canUseJIT = executableAllocator.isValid();

#endif

    jitStubs = new JITThunks(this);

#endif

}

JSGlobalData::~JSGlobalData()

{

    // By the time this is destroyed, heap.destroy() must already have been called.

    delete interpreter;

#ifndef NDEBUG

    // Zeroing out to make the behavior more predictable when someone attempts to use a deleted instance.

    interpreter = 0;

#endif

    arrayTable->deleteTable();

    dateTable->deleteTable();

    jsonTable->deleteTable();

    mathTable->deleteTable();

    numberTable->deleteTable();

    regExpTable->deleteTable();

    regExpConstructorTable->deleteTable();

    stringTable->deleteTable();

    fastDelete(const_cast<HashTable*>(arrayTable));

    fastDelete(const_cast<HashTable*>(dateTable));

    fastDelete(const_cast<HashTable*>(jsonTable));

    fastDelete(const_cast<HashTable*>(mathTable));

    fastDelete(const_cast<HashTable*>(numberTable));

    fastDelete(const_cast<HashTable*>(regExpTable));

    fastDelete(const_cast<HashTable*>(regExpConstructorTable));

    fastDelete(const_cast<HashTable*>(stringTable));

    delete parser;

    delete lexer;

    deleteAllValues(opaqueJSClassData);

    delete emptyList;

    delete propertyNames;

    if (globalDataType != Default)

        deleteIdentifierTable(identifierTable);

    delete clientData;

    delete m_regExpCache;

}

PassRefPtr<JSGlobalData> JSGlobalData::createContextGroup(ThreadStackType type)

{

    return adoptRef(new JSGlobalData(APIContextGroup, type));

}

PassRefPtr<JSGlobalData> JSGlobalData::create(ThreadStackType type)

{

    return adoptRef(new JSGlobalData(Default, type));

}

PassRefPtr<JSGlobalData> JSGlobalData::createLeaked(ThreadStackType type)

{

    Structure::startIgnoringLeaks();

    RefPtr<JSGlobalData> data = create(type);

    Structure::stopIgnoringLeaks();

    return data.release();

}

bool JSGlobalData::sharedInstanceExists()

{

    return sharedInstanceInternal();

}

JSGlobalData& JSGlobalData::sharedInstance()

{

    JSGlobalData*& instance = sharedInstanceInternal();

    if (!instance) {

        instance = adoptRef(new JSGlobalData(APIShared, ThreadStackTypeSmall)).leakRef();

#if ENABLE(JSC_MULTIPLE_THREADS)

        instance->makeUsableFromMultipleThreads();

#endif

    }

    return *instance;

}

JSGlobalData*& JSGlobalData::sharedInstanceInternal()

{

    ASSERT(JSLock::currentThreadIsHoldingLock());

    static JSGlobalData* sharedInstance;

    return sharedInstance;

}

#if ENABLE(JIT)

PassRefPtr<NativeExecutable> JSGlobalData::getHostFunction(NativeFunction function)

{

    return jitStubs->hostFunctionStub(this, function);

}

PassRefPtr<NativeExecutable> JSGlobalData::getHostFunction(NativeFunction function, ThunkGenerator generator)

{

    return jitStubs->hostFunctionStub(this, function, generator);

}

#endif

JSGlobalData::ClientData::~ClientData()

{

}

void JSGlobalData::resetDateCache()

{

    cachedUTCOffset = NaN;

    dstOffsetCache.reset();

    cachedDateString = UString();

    dateInstanceCache.reset();

}

void JSGlobalData::startSampling()

{

    interpreter->startSampling();

}

void JSGlobalData::stopSampling()

{

    interpreter->stopSampling();

}

void JSGlobalData::dumpSampleData(ExecState* exec)

{

    interpreter->dumpSampleData(exec);

}

} // namespace JSC