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/*
* Copyright (C) 2008, 2009 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.
*/
#ifndef JSGlobalData_h
#define JSGlobalData_h
#include "CachedTranscendentalFunction.h"
#include "DateInstanceCache.h"
#include "ExecutableAllocator.h"
#include "Heap.h"
#include "Intrinsic.h"
#include "JITStubs.h"
#include "JSLock.h"
#include "JSValue.h"
#include "LLIntData.h"
#include "NumericStrings.h"
#include "PrivateName.h"
#include "SmallStrings.h"
#include "Strong.h"
#include "Terminator.h"
#include "TimeoutChecker.h"
#include "TypedArrayDescriptor.h"
#include "WeakRandom.h"
#include <wtf/BumpPointerAllocator.h>
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/SimpleStats.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/ThreadSpecific.h>
#include <wtf/WTFThreadData.h>
#if ENABLE(REGEXP_TRACING)
#include <wtf/ListHashSet.h>
#endif
struct OpaqueJSClass;
struct OpaqueJSClassContextData;
namespace JSC {
class CodeBlock;
class CommonIdentifiers;
class HandleStack;
class IdentifierTable;
class Interpreter;
class JSGlobalObject;
class JSObject;
class Keywords;
class LLIntOffsetsExtractor;
class NativeExecutable;
class ParserArena;
class Profiler;
class RegExpCache;
class Stringifier;
class Structure;
#if ENABLE(REGEXP_TRACING)
class RegExp;
#endif
struct HashTable;
struct Instruction;
struct DSTOffsetCache {
DSTOffsetCache()
{
reset();
}
void reset()
{
offset = 0.0;
start = 0.0;
end = -1.0;
increment = 0.0;
}
double offset;
double start;
double end;
double increment;
};
#if ENABLE(DFG_JIT)
class ConservativeRoots;
#if COMPILER(MSVC)
#pragma warning(push)
#pragma warning(disable: 4200) // Disable "zero-sized array in struct/union" warning
#endif
struct ScratchBuffer {
ScratchBuffer()
: m_activeLength(0)
{
}
static ScratchBuffer* create(size_t size)
{
ScratchBuffer* result = new (fastMalloc(ScratchBuffer::allocationSize(size))) ScratchBuffer;
return result;
}
static size_t allocationSize(size_t bufferSize) { return sizeof(size_t) + bufferSize; }
void setActiveLength(size_t activeLength) { m_activeLength = activeLength; }
size_t activeLength() const { return m_activeLength; };
size_t* activeLengthPtr() { return &m_activeLength; };
void* dataBuffer() { return m_buffer; }
size_t m_activeLength;
void* m_buffer[0];
};
#if COMPILER(MSVC)
#pragma warning(pop)
#endif
#endif
class JSGlobalData : public ThreadSafeRefCounted<JSGlobalData> {
public:
// WebCore has a one-to-one mapping of threads to JSGlobalDatas;
// either create() or createLeaked() should only be called once
// on a thread, this is the 'default' JSGlobalData (it uses the
// thread's default string uniquing table from wtfThreadData).
// API contexts created using the new context group aware interface
// create APIContextGroup objects which require less locking of JSC
// than the old singleton APIShared JSGlobalData created for use by
// the original API.
enum GlobalDataType { Default, APIContextGroup, APIShared };
struct ClientData {
JS_EXPORT_PRIVATE virtual ~ClientData() = 0;
};
bool isSharedInstance() { return globalDataType == APIShared; }
bool usingAPI() { return globalDataType != Default; }
static bool sharedInstanceExists();
JS_EXPORT_PRIVATE static JSGlobalData& sharedInstance();
JS_EXPORT_PRIVATE static PassRefPtr<JSGlobalData> create(HeapType = SmallHeap);
JS_EXPORT_PRIVATE static PassRefPtr<JSGlobalData> createLeaked(HeapType = SmallHeap);
static PassRefPtr<JSGlobalData> createContextGroup(HeapType = SmallHeap);
JS_EXPORT_PRIVATE ~JSGlobalData();
void makeUsableFromMultipleThreads() { heap.machineThreads().makeUsableFromMultipleThreads(); }
private:
JSLock m_apiLock;
public:
#if ENABLE(ASSEMBLER)
// executableAllocator should be destructed after the heap, as the heap can call executableAllocator
// in its destructor.
ExecutableAllocator executableAllocator;
#endif
// The heap should be just after executableAllocator and before other members to ensure that it's
// destructed after all the objects that reference it.
Heap heap;
GlobalDataType globalDataType;
ClientData* clientData;
CallFrame* topCallFrame;
const HashTable* arrayConstructorTable;
const HashTable* arrayPrototypeTable;
const HashTable* booleanPrototypeTable;
const HashTable* dateTable;
const HashTable* dateConstructorTable;
const HashTable* errorPrototypeTable;
const HashTable* globalObjectTable;
const HashTable* jsonTable;
const HashTable* mathTable;
const HashTable* numberConstructorTable;
const HashTable* numberPrototypeTable;
const HashTable* objectConstructorTable;
const HashTable* objectPrototypeTable;
const HashTable* privateNamePrototypeTable;
const HashTable* regExpTable;
const HashTable* regExpConstructorTable;
const HashTable* regExpPrototypeTable;
const HashTable* stringTable;
const HashTable* stringConstructorTable;
Strong<Structure> structureStructure;
Strong<Structure> debuggerActivationStructure;
Strong<Structure> interruptedExecutionErrorStructure;
Strong<Structure> terminatedExecutionErrorStructure;
Strong<Structure> stringStructure;
Strong<Structure> notAnObjectStructure;
Strong<Structure> propertyNameIteratorStructure;
Strong<Structure> getterSetterStructure;
Strong<Structure> apiWrapperStructure;
Strong<Structure> JSScopeStructure;
Strong<Structure> executableStructure;
Strong<Structure> nativeExecutableStructure;
Strong<Structure> evalExecutableStructure;
Strong<Structure> programExecutableStructure;
Strong<Structure> functionExecutableStructure;
Strong<Structure> regExpStructure;
Strong<Structure> sharedSymbolTableStructure;
Strong<Structure> structureChainStructure;
Strong<Structure> sparseArrayValueMapStructure;
IdentifierTable* identifierTable;
CommonIdentifiers* propertyNames;
const MarkedArgumentBuffer* emptyList; // Lists are supposed to be allocated on the stack to have their elements properly marked, which is not the case here - but this list has nothing to mark.
SmallStrings smallStrings;
NumericStrings numericStrings;
DateInstanceCache dateInstanceCache;
WTF::SimpleStats machineCodeBytesPerBytecodeWordForBaselineJIT;
Vector<CodeBlock*> codeBlocksBeingCompiled;
void startedCompiling(CodeBlock* codeBlock)
{
codeBlocksBeingCompiled.append(codeBlock);
}
void finishedCompiling(CodeBlock* codeBlock)
{
ASSERT_UNUSED(codeBlock, codeBlock == codeBlocksBeingCompiled.last());
codeBlocksBeingCompiled.removeLast();
}
void setInDefineOwnProperty(bool inDefineOwnProperty)
{
m_inDefineOwnProperty = inDefineOwnProperty;
}
bool isInDefineOwnProperty()
{
return m_inDefineOwnProperty;
}
Profiler* enabledProfiler()
{
return m_enabledProfiler;
}
#if ENABLE(JIT) && ENABLE(LLINT)
bool canUseJIT() { return m_canUseJIT; }
#elif ENABLE(JIT)
bool canUseJIT() { return true; } // jit only
#else
bool canUseJIT() { return false; } // interpreter only
#endif
#if ENABLE(YARR_JIT)
bool canUseRegExpJIT() { return m_canUseRegExpJIT; }
#else
bool canUseRegExpJIT() { return false; } // interpreter only
#endif
PrivateName m_inheritorIDKey;
OwnPtr<ParserArena> parserArena;
OwnPtr<Keywords> keywords;
Interpreter* interpreter;
#if ENABLE(JIT)
OwnPtr<JITThunks> jitStubs;
MacroAssemblerCodeRef getCTIStub(ThunkGenerator generator)
{
return jitStubs->ctiStub(this, generator);
}
NativeExecutable* getHostFunction(NativeFunction, Intrinsic);
#endif
NativeExecutable* getHostFunction(NativeFunction, NativeFunction constructor);
TimeoutChecker timeoutChecker;
Terminator terminator;
JSValue exception;
const ClassInfo* const jsArrayClassInfo;
const ClassInfo* const jsFinalObjectClassInfo;
ReturnAddressPtr exceptionLocation;
JSValue hostCallReturnValue;
CallFrame* callFrameForThrow;
void* targetMachinePCForThrow;
Instruction* targetInterpreterPCForThrow;
#if ENABLE(DFG_JIT)
uint32_t osrExitIndex;
void* osrExitJumpDestination;
Vector<ScratchBuffer*> scratchBuffers;
size_t sizeOfLastScratchBuffer;
ScratchBuffer* scratchBufferForSize(size_t size)
{
if (!size)
return 0;
if (size > sizeOfLastScratchBuffer) {
// Protect against a N^2 memory usage pathology by ensuring
// that at worst, we get a geometric series, meaning that the
// total memory usage is somewhere around
// max(scratch buffer size) * 4.
sizeOfLastScratchBuffer = size * 2;
scratchBuffers.append(ScratchBuffer::create(sizeOfLastScratchBuffer));
}
ScratchBuffer* result = scratchBuffers.last();
result->setActiveLength(0);
return result;
}
void gatherConservativeRoots(ConservativeRoots&);
#endif
HashMap<OpaqueJSClass*, OwnPtr<OpaqueJSClassContextData> > opaqueJSClassData;
JSGlobalObject* dynamicGlobalObject;
HashSet<JSObject*> stringRecursionCheckVisitedObjects;
double cachedUTCOffset;
DSTOffsetCache dstOffsetCache;
String cachedDateString;
double cachedDateStringValue;
Profiler* m_enabledProfiler;
RegExpCache* m_regExpCache;
BumpPointerAllocator m_regExpAllocator;
#if ENABLE(REGEXP_TRACING)
typedef ListHashSet<RefPtr<RegExp> > RTTraceList;
RTTraceList* m_rtTraceList;
#endif
#ifndef NDEBUG
ThreadIdentifier exclusiveThread;
#endif
CachedTranscendentalFunction<sin> cachedSin;
JS_EXPORT_PRIVATE void resetDateCache();
JS_EXPORT_PRIVATE void startSampling();
JS_EXPORT_PRIVATE void stopSampling();
JS_EXPORT_PRIVATE void dumpSampleData(ExecState* exec);
RegExpCache* regExpCache() { return m_regExpCache; }
#if ENABLE(REGEXP_TRACING)
void addRegExpToTrace(PassRefPtr<RegExp> regExp);
#endif
JS_EXPORT_PRIVATE void dumpRegExpTrace();
bool isCollectorBusy() { return heap.isBusy(); }
JS_EXPORT_PRIVATE void releaseExecutableMemory();
#if ENABLE(GC_VALIDATION)
bool isInitializingObject() const;
void setInitializingObjectClass(const ClassInfo*);
#endif
#if CPU(X86) && ENABLE(JIT)
unsigned m_timeoutCount;
#endif
unsigned m_newStringsSinceLastHashConst;
static const unsigned s_minNumberOfNewStringsToHashConst = 100;
bool haveEnoughNewStringsToHashConst() { return m_newStringsSinceLastHashConst > s_minNumberOfNewStringsToHashConst; }
void resetNewStringsSinceLastHashConst() { m_newStringsSinceLastHashConst = 0; }
#define registerTypedArrayFunction(type, capitalizedType) \
void registerTypedArrayDescriptor(const capitalizedType##Array*, const TypedArrayDescriptor& descriptor) \
{ \
ASSERT(!m_##type##ArrayDescriptor.m_classInfo || m_##type##ArrayDescriptor.m_classInfo == descriptor.m_classInfo); \
m_##type##ArrayDescriptor = descriptor; \
ASSERT(m_##type##ArrayDescriptor.m_classInfo); \
} \
const TypedArrayDescriptor& type##ArrayDescriptor() const { ASSERT(m_##type##ArrayDescriptor.m_classInfo); return m_##type##ArrayDescriptor; }
registerTypedArrayFunction(int8, Int8);
registerTypedArrayFunction(int16, Int16);
registerTypedArrayFunction(int32, Int32);
registerTypedArrayFunction(uint8, Uint8);
registerTypedArrayFunction(uint8Clamped, Uint8Clamped);
registerTypedArrayFunction(uint16, Uint16);
registerTypedArrayFunction(uint32, Uint32);
registerTypedArrayFunction(float32, Float32);
registerTypedArrayFunction(float64, Float64);
#undef registerTypedArrayFunction
const TypedArrayDescriptor* typedArrayDescriptor(TypedArrayType type) const
{
switch (type) {
case TypedArrayNone:
return 0;
case TypedArrayInt8:
return &int8ArrayDescriptor();
case TypedArrayInt16:
return &int16ArrayDescriptor();
case TypedArrayInt32:
return &int32ArrayDescriptor();
case TypedArrayUint8:
return &uint8ArrayDescriptor();
case TypedArrayUint8Clamped:
return &uint8ClampedArrayDescriptor();
case TypedArrayUint16:
return &uint16ArrayDescriptor();
case TypedArrayUint32:
return &uint32ArrayDescriptor();
case TypedArrayFloat32:
return &float32ArrayDescriptor();
case TypedArrayFloat64:
return &float64ArrayDescriptor();
default:
CRASH();
return 0;
}
}
JSLock& apiLock() { return m_apiLock; }
private:
friend class LLIntOffsetsExtractor;
JSGlobalData(GlobalDataType, HeapType);
static JSGlobalData*& sharedInstanceInternal();
void createNativeThunk();
#if ENABLE(ASSEMBLER)
bool m_canUseAssembler;
#endif
#if ENABLE(JIT)
bool m_canUseJIT;
#endif
#if ENABLE(YARR_JIT)
bool m_canUseRegExpJIT;
#endif
#if ENABLE(GC_VALIDATION)
const ClassInfo* m_initializingObjectClass;
#endif
bool m_inDefineOwnProperty;
TypedArrayDescriptor m_int8ArrayDescriptor;
TypedArrayDescriptor m_int16ArrayDescriptor;
TypedArrayDescriptor m_int32ArrayDescriptor;
TypedArrayDescriptor m_uint8ArrayDescriptor;
TypedArrayDescriptor m_uint8ClampedArrayDescriptor;
TypedArrayDescriptor m_uint16ArrayDescriptor;
TypedArrayDescriptor m_uint32ArrayDescriptor;
TypedArrayDescriptor m_float32ArrayDescriptor;
TypedArrayDescriptor m_float64ArrayDescriptor;
};
#if ENABLE(GC_VALIDATION)
inline bool JSGlobalData::isInitializingObject() const
{
return !!m_initializingObjectClass;
}
inline void JSGlobalData::setInitializingObjectClass(const ClassInfo* initializingObjectClass)
{
m_initializingObjectClass = initializingObjectClass;
}
#endif
inline Heap* WeakSet::heap() const
{
return &m_globalData->heap;
}
} // namespace JSC
#endif // JSGlobalData_h
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