void JSGlobalObject::mark()
{
JSVariableObject::mark();
HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
(*it)->mark();
RegisterFile& registerFile = globalData()->interpreter->registerFile();
if (registerFile.globalObject() == this)
registerFile.markGlobals(&globalData()->heap);
markIfNeeded(d()->regExpConstructor);
markIfNeeded(d()->errorConstructor);
markIfNeeded(d()->evalErrorConstructor);
markIfNeeded(d()->rangeErrorConstructor);
markIfNeeded(d()->referenceErrorConstructor);
markIfNeeded(d()->syntaxErrorConstructor);
markIfNeeded(d()->typeErrorConstructor);
markIfNeeded(d()->URIErrorConstructor);
markIfNeeded(d()->evalFunction);
markIfNeeded(d()->callFunction);
markIfNeeded(d()->applyFunction);
markIfNeeded(d()->objectPrototype);
markIfNeeded(d()->functionPrototype);
markIfNeeded(d()->arrayPrototype);
markIfNeeded(d()->booleanPrototype);
markIfNeeded(d()->stringPrototype);
markIfNeeded(d()->numberPrototype);
markIfNeeded(d()->datePrototype);
markIfNeeded(d()->regExpPrototype);
markIfNeeded(d()->errorStructure);
// No need to mark the other structures, because their prototypes are all
// guaranteed to be referenced elsewhere.
Register* registerArray = d()->registerArray.get();
if (!registerArray)
return;
size_t size = d()->registerArraySize;
for (size_t i = 0; i < size; ++i) {
Register& r = registerArray[i];
if (!r.marked())
r.mark();
}
}
void Heap::collect(SweepToggle sweepToggle)
{
ASSERT(globalData()->identifierTable == wtfThreadData().currentIdentifierTable());
JAVASCRIPTCORE_GC_BEGIN();
markRoots();
m_handleHeap.finalizeWeakHandles();
m_globalData->smallStrings.finalizeSmallStrings();
JAVASCRIPTCORE_GC_MARKED();
resetAllocator();
#if ENABLE(JSC_ZOMBIES)
sweepToggle = DoSweep;
#endif
if (sweepToggle == DoSweep) {
sweep();
shrink();
}
// To avoid pathological GC churn in large heaps, we set the allocation high
// water mark to be proportional to the current size of the heap. The exact
// proportion is a bit arbitrary. A 2X multiplier gives a 1:1 (heap size :
// new bytes allocated) proportion, and seems to work well in benchmarks.
size_t proportionalBytes = 2 * size();
m_newSpace.setHighWaterMark(max(proportionalBytes, minBytesPerCycle));
JAVASCRIPTCORE_GC_END();
(*m_activityCallback)();
}
void WorkerScriptController::disableEval(const String& errorMessage)
{
initScriptIfNeeded();
JSLockHolder lock(globalData());
m_workerContextWrapper->setEvalEnabled(false, errorMessage);
}
JSGlobalObject::~JSGlobalObject()
{
ASSERT(JSLock::currentThreadIsHoldingLock());
if (d()->debugger)
d()->debugger->detach(this);
Profiler** profiler = Profiler::enabledProfilerReference();
if (UNLIKELY(*profiler != 0)) {
(*profiler)->stopProfiling(globalExec(), UString());
}
d()->next->d()->prev = d()->prev;
d()->prev->d()->next = d()->next;
JSGlobalObject*& headObject = head();
if (headObject == this)
headObject = d()->next;
if (headObject == this)
headObject = 0;
HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
(*it)->clearGlobalObject();
RegisterFile& registerFile = globalData()->interpreter->registerFile();
if (registerFile.globalObject() == this) {
registerFile.setGlobalObject(0);
registerFile.setNumGlobals(0);
}
delete d();
}
MarkedBlock* MarkedSpace::allocateBlock(SizeClass& sizeClass)
{
MarkedBlock* block = MarkedBlock::create(globalData(), sizeClass.cellSize);
sizeClass.blockList.append(block);
sizeClass.nextBlock = block;
m_blocks.add(block);
return block;
}
void Heap::collect(SweepToggle sweepToggle)
{
GCPHASE(Collect);
ASSERT(globalData()->identifierTable == wtfThreadData().currentIdentifierTable());
ASSERT(m_isSafeToCollect);
JAVASCRIPTCORE_GC_BEGIN();
#if ENABLE(GGC)
bool fullGC = sweepToggle == DoSweep;
if (!fullGC)
fullGC = (capacity() > 4 * m_lastFullGCSize);
#else
bool fullGC = true;
#endif
{
GCPHASE(Canonicalize);
canonicalizeCellLivenessData();
}
markRoots(fullGC);
{
GCPHASE(HarvestWeakReferences);
harvestWeakReferences();
m_handleHeap.finalizeWeakHandles();
m_globalData->smallStrings.finalizeSmallStrings();
}
JAVASCRIPTCORE_GC_MARKED();
{
GCPHASE(ResetAllocator);
resetAllocator();
}
if (sweepToggle == DoSweep) {
GCPHASE(Sweeping);
sweep();
shrink();
}
// To avoid pathological GC churn in large heaps, we set the allocation high
// water mark to be proportional to the current size of the heap. The exact
// proportion is a bit arbitrary. A 2X multiplier gives a 1:1 (heap size :
// new bytes allocated) proportion, and seems to work well in benchmarks.
size_t newSize = size();
size_t proportionalBytes = 2 * newSize;
if (fullGC) {
m_lastFullGCSize = newSize;
m_objectSpace.setHighWaterMark(max(proportionalBytes, m_minBytesPerCycle));
}
JAVASCRIPTCORE_GC_END();
(*m_activityCallback)();
}
void WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode)
{
if (isExecutionForbidden())
return;
ScriptValue exception;
evaluate(sourceCode, &exception);
if (exception.jsValue()) {
JSLockHolder lock(globalData());
reportException(m_workerContextWrapper->globalExec(), exception.jsValue());
}
}
void JSGlobalObject::resizeRegisters(int oldSize, int newSize)
{
ASSERT(oldSize <= newSize);
if (newSize == oldSize)
return;
ASSERT(newSize && newSize > oldSize);
if (m_registerArray || !m_registers) {
ASSERT(static_cast<size_t>(oldSize) == m_registerArraySize);
OwnArrayPtr<WriteBarrier<Unknown> > registerArray = adoptArrayPtr(new WriteBarrier<Unknown>[newSize]);
for (int i = 0; i < oldSize; i++)
registerArray[newSize - oldSize + i].set(globalData(), this, m_registerArray[i].get());
WriteBarrier<Unknown>* registers = registerArray.get() + newSize;
setRegisters(registers, registerArray.release(), newSize);
} else {
ASSERT(static_cast<size_t>(newSize) < globalData().interpreter->registerFile().maxGlobals());
globalData().interpreter->registerFile().setNumGlobals(newSize);
}
for (int i = -newSize; i < -oldSize; ++i)
m_registers[i].setUndefined();
}
void JSGlobalObject::copyGlobalsFrom(RegisterFile& registerFile)
{
ASSERT(!m_registerArray);
ASSERT(!m_registerArraySize);
int numGlobals = registerFile.numGlobals();
if (!numGlobals) {
m_registers = 0;
return;
}
OwnArrayPtr<WriteBarrier<Unknown> > registerArray = copyRegisterArray(globalData(), reinterpret_cast<WriteBarrier<Unknown>*>(registerFile.lastGlobal()), numGlobals, numGlobals);
WriteBarrier<Unknown>* registers = registerArray.get() + numGlobals;
setRegisters(registers, registerArray.release(), numGlobals);
}
void* Heap::allocateSlowCase(size_t bytes)
{
ASSERT(globalData()->identifierTable == wtfThreadData().currentIdentifierTable());
ASSERT(JSLock::lockCount() > 0);
ASSERT(JSLock::currentThreadIsHoldingLock());
ASSERT(bytes <= MarkedSpace::maxCellSize);
ASSERT(m_operationInProgress == NoOperation);
#if COLLECT_ON_EVERY_SLOW_ALLOCATION
collectAllGarbage();
ASSERT(m_operationInProgress == NoOperation);
#endif
reset(DoNotSweep);
m_operationInProgress = Allocation;
void* result = m_markedSpace.allocate(bytes);
m_operationInProgress = NoOperation;
ASSERT(result);
return result;
}
void JSDOMGlobalObject::setInjectedScript(JSObject* injectedScript)
{
m_injectedScript.setMayBeNull(globalData(), this, injectedScript);
}
void JSGlobalObject::markChildren(MarkStack& markStack)
{
JSVariableObject::markChildren(markStack);
HashSet<GlobalCodeBlock*>::const_iterator end = codeBlocks().end();
for (HashSet<GlobalCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
(*it)->markAggregate(markStack);
RegisterFile& registerFile = globalData()->interpreter->registerFile();
if (registerFile.globalObject() == this)
registerFile.markGlobals(markStack, &globalData()->heap);
markIfNeeded(markStack, d()->regExpConstructor);
markIfNeeded(markStack, d()->errorConstructor);
markIfNeeded(markStack, d()->evalErrorConstructor);
markIfNeeded(markStack, d()->rangeErrorConstructor);
markIfNeeded(markStack, d()->referenceErrorConstructor);
markIfNeeded(markStack, d()->syntaxErrorConstructor);
markIfNeeded(markStack, d()->typeErrorConstructor);
markIfNeeded(markStack, d()->URIErrorConstructor);
markIfNeeded(markStack, d()->evalFunction);
markIfNeeded(markStack, d()->callFunction);
markIfNeeded(markStack, d()->applyFunction);
markIfNeeded(markStack, d()->objectPrototype);
markIfNeeded(markStack, d()->functionPrototype);
markIfNeeded(markStack, d()->arrayPrototype);
markIfNeeded(markStack, d()->booleanPrototype);
markIfNeeded(markStack, d()->stringPrototype);
markIfNeeded(markStack, d()->numberPrototype);
markIfNeeded(markStack, d()->datePrototype);
markIfNeeded(markStack, d()->regExpPrototype);
markIfNeeded(markStack, d()->methodCallDummy);
markIfNeeded(markStack, d()->errorStructure);
markIfNeeded(markStack, d()->argumentsStructure);
markIfNeeded(markStack, d()->arrayStructure);
markIfNeeded(markStack, d()->booleanObjectStructure);
markIfNeeded(markStack, d()->callbackConstructorStructure);
markIfNeeded(markStack, d()->callbackFunctionStructure);
markIfNeeded(markStack, d()->callbackObjectStructure);
markIfNeeded(markStack, d()->dateStructure);
markIfNeeded(markStack, d()->emptyObjectStructure);
markIfNeeded(markStack, d()->errorStructure);
markIfNeeded(markStack, d()->functionStructure);
markIfNeeded(markStack, d()->numberObjectStructure);
markIfNeeded(markStack, d()->prototypeFunctionStructure);
markIfNeeded(markStack, d()->regExpMatchesArrayStructure);
markIfNeeded(markStack, d()->regExpStructure);
markIfNeeded(markStack, d()->stringObjectStructure);
// No need to mark the other structures, because their prototypes are all
// guaranteed to be referenced elsewhere.
Register* registerArray = d()->registerArray.get();
if (!registerArray)
return;
size_t size = d()->registerArraySize;
markStack.appendValues(reinterpret_cast<JSValue*>(registerArray), size);
}
void JSGlobalObject::stopTimeoutCheck()
{
globalData()->interpreter->stopTimeoutCheck();
}
void JSGlobalObject::setTimeoutTime(unsigned timeoutTime)
{
globalData()->interpreter->setTimeoutTime(timeoutTime);
}
void fixupNode(Node& node)
{
if (!node.shouldGenerate())
return;
NodeType op = node.op();
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLog(" %s @%u: ", Graph::opName(op), m_compileIndex);
#endif
switch (op) {
case GetById: {
if (!isInt32Prediction(m_graph[m_compileIndex].prediction()))
break;
if (codeBlock()->identifier(node.identifierNumber()) != globalData().propertyNames->length)
break;
bool isArray = isArrayPrediction(m_graph[node.child1()].prediction());
bool isString = isStringPrediction(m_graph[node.child1()].prediction());
bool isByteArray = m_graph[node.child1()].shouldSpeculateByteArray();
bool isInt8Array = m_graph[node.child1()].shouldSpeculateInt8Array();
bool isInt16Array = m_graph[node.child1()].shouldSpeculateInt16Array();
bool isInt32Array = m_graph[node.child1()].shouldSpeculateInt32Array();
bool isUint8Array = m_graph[node.child1()].shouldSpeculateUint8Array();
bool isUint8ClampedArray = m_graph[node.child1()].shouldSpeculateUint8ClampedArray();
bool isUint16Array = m_graph[node.child1()].shouldSpeculateUint16Array();
bool isUint32Array = m_graph[node.child1()].shouldSpeculateUint32Array();
bool isFloat32Array = m_graph[node.child1()].shouldSpeculateFloat32Array();
bool isFloat64Array = m_graph[node.child1()].shouldSpeculateFloat64Array();
if (!isArray && !isString && !isByteArray && !isInt8Array && !isInt16Array && !isInt32Array && !isUint8Array && !isUint8ClampedArray && !isUint16Array && !isUint32Array && !isFloat32Array && !isFloat64Array)
break;
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLog(" @%u -> %s", m_compileIndex, isArray ? "GetArrayLength" : "GetStringLength");
#endif
if (isArray)
node.setOp(GetArrayLength);
else if (isString)
node.setOp(GetStringLength);
else if (isByteArray)
node.setOp(GetByteArrayLength);
else if (isInt8Array)
node.setOp(GetInt8ArrayLength);
else if (isInt16Array)
node.setOp(GetInt16ArrayLength);
else if (isInt32Array)
node.setOp(GetInt32ArrayLength);
else if (isUint8Array)
node.setOp(GetUint8ArrayLength);
else if (isUint8ClampedArray)
node.setOp(GetUint8ClampedArrayLength);
else if (isUint16Array)
node.setOp(GetUint16ArrayLength);
else if (isUint32Array)
node.setOp(GetUint32ArrayLength);
else if (isFloat32Array)
node.setOp(GetFloat32ArrayLength);
else if (isFloat64Array)
node.setOp(GetFloat64ArrayLength);
else
ASSERT_NOT_REACHED();
// No longer MustGenerate
ASSERT(node.flags() & NodeMustGenerate);
node.clearFlags(NodeMustGenerate);
m_graph.deref(m_compileIndex);
break;
}
case GetIndexedPropertyStorage: {
PredictedType basePrediction = m_graph[node.child2()].prediction();
if (!(basePrediction & PredictInt32) && basePrediction) {
node.setOpAndDefaultFlags(Nop);
m_graph.clearAndDerefChild1(node);
m_graph.clearAndDerefChild2(node);
m_graph.clearAndDerefChild3(node);
node.setRefCount(0);
}
break;
}
case GetByVal:
case StringCharAt:
case StringCharCodeAt: {
if (!!node.child3() && m_graph[node.child3()].op() == Nop)
node.children.child3() = Edge();
break;
}
case ValueToInt32: {
if (m_graph[node.child1()].shouldSpeculateNumber()) {
node.clearFlags(NodeMustGenerate);
m_graph.deref(m_compileIndex);
}
break;
}
case BitAnd:
case BitOr:
case BitXor:
case BitRShift:
case BitLShift:
case BitURShift: {
fixIntEdge(node.children.child1());
fixIntEdge(node.children.child2());
break;
}
case CompareEq:
case CompareLess:
case CompareLessEq:
case CompareGreater:
case CompareGreaterEq:
case CompareStrictEq: {
if (Node::shouldSpeculateInteger(m_graph[node.child1()], m_graph[node.child2()]))
break;
if (!Node::shouldSpeculateNumber(m_graph[node.child1()], m_graph[node.child2()]))
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case LogicalNot: {
if (m_graph[node.child1()].shouldSpeculateInteger())
break;
if (!m_graph[node.child1()].shouldSpeculateNumber())
break;
fixDoubleEdge(0);
break;
}
case Branch: {
if (!m_graph[node.child1()].shouldSpeculateInteger()
&& m_graph[node.child1()].shouldSpeculateNumber())
fixDoubleEdge(0);
Node& myNode = m_graph[m_compileIndex]; // reload because the graph may have changed
Edge logicalNotEdge = myNode.child1();
Node& logicalNot = m_graph[logicalNotEdge];
if (logicalNot.op() == LogicalNot
&& logicalNot.adjustedRefCount() == 1) {
Edge newChildEdge = logicalNot.child1();
m_graph.ref(newChildEdge);
m_graph.deref(logicalNotEdge);
myNode.children.setChild1(newChildEdge);
BlockIndex toBeTaken = myNode.notTakenBlockIndex();
BlockIndex toBeNotTaken = myNode.takenBlockIndex();
myNode.setTakenBlockIndex(toBeTaken);
myNode.setNotTakenBlockIndex(toBeNotTaken);
}
break;
}
case SetLocal: {
if (m_graph.isCaptured(node.local()))
break;
if (!node.variableAccessData()->shouldUseDoubleFormat())
break;
fixDoubleEdge(0);
break;
}
case ArithAdd:
case ValueAdd: {
if (m_graph.addShouldSpeculateInteger(node))
break;
if (!Node::shouldSpeculateNumber(m_graph[node.child1()], m_graph[node.child2()]))
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithSub: {
if (m_graph.addShouldSpeculateInteger(node)
&& node.canSpeculateInteger())
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithNegate: {
if (m_graph.negateShouldSpeculateInteger(node))
break;
fixDoubleEdge(0);
break;
}
case ArithMin:
case ArithMax:
case ArithMul:
case ArithDiv:
case ArithMod: {
if (Node::shouldSpeculateInteger(m_graph[node.child1()], m_graph[node.child2()])
&& node.canSpeculateInteger())
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithAbs: {
if (m_graph[node.child1()].shouldSpeculateInteger()
&& node.canSpeculateInteger())
break;
fixDoubleEdge(0);
break;
}
case ArithSqrt: {
fixDoubleEdge(0);
break;
}
case PutByVal: {
if (!m_graph[node.child1()].prediction() || !m_graph[node.child2()].prediction())
break;
if (!m_graph[node.child2()].shouldSpeculateInteger())
break;
if (isActionableIntMutableArrayPrediction(m_graph[node.child1()].prediction())) {
if (m_graph[node.child3()].isConstant())
break;
if (m_graph[node.child3()].shouldSpeculateInteger())
break;
fixDoubleEdge(2);
break;
}
if (isActionableFloatMutableArrayPrediction(m_graph[node.child1()].prediction())) {
fixDoubleEdge(2);
break;
}
break;
}
default:
break;
}
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
if (!(node.flags() & NodeHasVarArgs)) {
dataLog("new children: ");
node.dumpChildren(WTF::dataFile());
}
dataLog("\n");
#endif
}
WorkerScriptController::~WorkerScriptController()
{
JSLockHolder lock(globalData());
m_workerContextWrapper.clear();
m_globalData.clear();
}
void JITCompiler::link(LinkBuffer& linkBuffer)
{
// Link the code, populate data in CodeBlock data structures.
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("JIT code for %p start at [%p, %p). Size = %zu.\n", m_codeBlock, linkBuffer.debugAddress(), static_cast<char*>(linkBuffer.debugAddress()) + linkBuffer.debugSize(), linkBuffer.debugSize());
#endif
// Link all calls out from the JIT code to their respective functions.
for (unsigned i = 0; i < m_calls.size(); ++i)
linkBuffer.link(m_calls[i].m_call, m_calls[i].m_function);
m_codeBlock->callReturnIndexVector().reserveCapacity(m_exceptionChecks.size());
for (unsigned i = 0; i < m_exceptionChecks.size(); ++i) {
unsigned returnAddressOffset = linkBuffer.returnAddressOffset(m_exceptionChecks[i].m_call);
CodeOrigin codeOrigin = m_exceptionChecks[i].m_codeOrigin;
while (codeOrigin.inlineCallFrame)
codeOrigin = codeOrigin.inlineCallFrame->caller;
unsigned exceptionInfo = codeOrigin.bytecodeIndex;
m_codeBlock->callReturnIndexVector().append(CallReturnOffsetToBytecodeOffset(returnAddressOffset, exceptionInfo));
}
Vector<CodeOriginAtCallReturnOffset>& codeOrigins = m_codeBlock->codeOrigins();
codeOrigins.resize(m_exceptionChecks.size());
for (unsigned i = 0; i < m_exceptionChecks.size(); ++i) {
CallExceptionRecord& record = m_exceptionChecks[i];
unsigned returnAddressOffset = linkBuffer.returnAddressOffset(m_exceptionChecks[i].m_call);
codeOrigins[i].codeOrigin = record.m_codeOrigin;
codeOrigins[i].callReturnOffset = returnAddressOffset;
record.m_token.assertCodeOriginIndex(i);
}
m_codeBlock->setNumberOfStructureStubInfos(m_propertyAccesses.size());
for (unsigned i = 0; i < m_propertyAccesses.size(); ++i) {
StructureStubInfo& info = m_codeBlock->structureStubInfo(i);
CodeLocationCall callReturnLocation = linkBuffer.locationOf(m_propertyAccesses[i].m_slowPathGenerator->call());
info.codeOrigin = m_propertyAccesses[i].m_codeOrigin;
info.callReturnLocation = callReturnLocation;
info.patch.dfg.deltaCheckImmToCall = differenceBetweenCodePtr(linkBuffer.locationOf(m_propertyAccesses[i].m_structureImm), callReturnLocation);
info.patch.dfg.deltaCallToStructCheck = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_structureCheck));
#if USE(JSVALUE64)
info.patch.dfg.deltaCallToLoadOrStore = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_loadOrStore));
#else
info.patch.dfg.deltaCallToTagLoadOrStore = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_tagLoadOrStore));
info.patch.dfg.deltaCallToPayloadLoadOrStore = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_payloadLoadOrStore));
#endif
info.patch.dfg.deltaCallToSlowCase = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_slowPathGenerator->label()));
info.patch.dfg.deltaCallToDone = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_done));
info.patch.dfg.baseGPR = m_propertyAccesses[i].m_baseGPR;
#if USE(JSVALUE64)
info.patch.dfg.valueGPR = m_propertyAccesses[i].m_valueGPR;
#else
info.patch.dfg.valueTagGPR = m_propertyAccesses[i].m_valueTagGPR;
info.patch.dfg.valueGPR = m_propertyAccesses[i].m_valueGPR;
#endif
info.patch.dfg.scratchGPR = m_propertyAccesses[i].m_scratchGPR;
info.patch.dfg.registersFlushed = m_propertyAccesses[i].m_registerMode == PropertyAccessRecord::RegistersFlushed;
}
m_codeBlock->setNumberOfCallLinkInfos(m_jsCalls.size());
for (unsigned i = 0; i < m_jsCalls.size(); ++i) {
CallLinkInfo& info = m_codeBlock->callLinkInfo(i);
info.callType = m_jsCalls[i].m_callType;
info.isDFG = true;
info.callReturnLocation = CodeLocationLabel(linkBuffer.locationOf(m_jsCalls[i].m_slowCall));
info.hotPathBegin = linkBuffer.locationOf(m_jsCalls[i].m_targetToCheck);
info.hotPathOther = linkBuffer.locationOfNearCall(m_jsCalls[i].m_fastCall);
}
MacroAssemblerCodeRef osrExitThunk = globalData()->getCTIStub(osrExitGenerationThunkGenerator);
CodeLocationLabel target = CodeLocationLabel(osrExitThunk.code());
for (unsigned i = 0; i < codeBlock()->numberOfOSRExits(); ++i) {
OSRExit& exit = codeBlock()->osrExit(i);
linkBuffer.link(exit.m_check.lateJump(), target);
exit.m_check.correctLateJump(linkBuffer);
if (exit.m_watchpointIndex != std::numeric_limits<unsigned>::max())
codeBlock()->watchpoint(exit.m_watchpointIndex).correctLabels(linkBuffer);
}
codeBlock()->shrinkToFit(CodeBlock::LateShrink);
}
void fixupNode(Node& node)
{
if (!node.shouldGenerate())
return;
NodeType op = node.op();
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLog(" %s @%u: ", Graph::opName(op), m_compileIndex);
#endif
switch (op) {
case GetById: {
if (!isInt32Speculation(m_graph[m_compileIndex].prediction()))
break;
if (codeBlock()->identifier(node.identifierNumber()) != globalData().propertyNames->length)
break;
bool isArray = isArraySpeculation(m_graph[node.child1()].prediction());
bool isArguments = isArgumentsSpeculation(m_graph[node.child1()].prediction());
bool isString = isStringSpeculation(m_graph[node.child1()].prediction());
bool isInt8Array = m_graph[node.child1()].shouldSpeculateInt8Array();
bool isInt16Array = m_graph[node.child1()].shouldSpeculateInt16Array();
bool isInt32Array = m_graph[node.child1()].shouldSpeculateInt32Array();
bool isUint8Array = m_graph[node.child1()].shouldSpeculateUint8Array();
bool isUint8ClampedArray = m_graph[node.child1()].shouldSpeculateUint8ClampedArray();
bool isUint16Array = m_graph[node.child1()].shouldSpeculateUint16Array();
bool isUint32Array = m_graph[node.child1()].shouldSpeculateUint32Array();
bool isFloat32Array = m_graph[node.child1()].shouldSpeculateFloat32Array();
bool isFloat64Array = m_graph[node.child1()].shouldSpeculateFloat64Array();
if (!isArray && !isArguments && !isString && !isInt8Array && !isInt16Array && !isInt32Array && !isUint8Array && !isUint8ClampedArray && !isUint16Array && !isUint32Array && !isFloat32Array && !isFloat64Array)
break;
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
dataLog(" @%u -> %s", m_compileIndex, isArray ? "GetArrayLength" : "GetStringLength");
#endif
if (isArray) {
node.setOp(GetArrayLength);
ASSERT(node.flags() & NodeMustGenerate);
node.clearFlags(NodeMustGenerate);
m_graph.deref(m_compileIndex);
ArrayProfile* arrayProfile =
m_graph.baselineCodeBlockFor(node.codeOrigin)->getArrayProfile(
node.codeOrigin.bytecodeIndex);
if (!arrayProfile)
break;
arrayProfile->computeUpdatedPrediction();
if (!arrayProfile->hasDefiniteStructure())
break;
m_graph.ref(node.child1());
Node checkStructure(CheckStructure, node.codeOrigin, OpInfo(m_graph.addStructureSet(arrayProfile->expectedStructure())), node.child1().index());
checkStructure.ref();
NodeIndex checkStructureIndex = m_graph.size();
m_graph.append(checkStructure);
m_insertionSet.append(m_indexInBlock, checkStructureIndex);
break;
}
if (isArguments)
node.setOp(GetArgumentsLength);
else if (isString)
node.setOp(GetStringLength);
else if (isInt8Array)
node.setOp(GetInt8ArrayLength);
else if (isInt16Array)
node.setOp(GetInt16ArrayLength);
else if (isInt32Array)
node.setOp(GetInt32ArrayLength);
else if (isUint8Array)
node.setOp(GetUint8ArrayLength);
else if (isUint8ClampedArray)
node.setOp(GetUint8ClampedArrayLength);
else if (isUint16Array)
node.setOp(GetUint16ArrayLength);
else if (isUint32Array)
node.setOp(GetUint32ArrayLength);
else if (isFloat32Array)
node.setOp(GetFloat32ArrayLength);
else if (isFloat64Array)
node.setOp(GetFloat64ArrayLength);
else
ASSERT_NOT_REACHED();
// No longer MustGenerate
ASSERT(node.flags() & NodeMustGenerate);
node.clearFlags(NodeMustGenerate);
m_graph.deref(m_compileIndex);
break;
}
case GetIndexedPropertyStorage: {
if (!m_graph[node.child1()].prediction()
|| !m_graph[node.child2()].shouldSpeculateInteger()
|| m_graph[node.child1()].shouldSpeculateArguments()) {
node.setOpAndDefaultFlags(Nop);
m_graph.clearAndDerefChild1(node);
m_graph.clearAndDerefChild2(node);
m_graph.clearAndDerefChild3(node);
node.setRefCount(0);
}
break;
}
case GetByVal:
case StringCharAt:
case StringCharCodeAt: {
if (!!node.child3() && m_graph[node.child3()].op() == Nop)
node.children.child3() = Edge();
break;
}
case ValueToInt32: {
if (m_graph[node.child1()].shouldSpeculateNumber()
&& node.mustGenerate()) {
node.clearFlags(NodeMustGenerate);
m_graph.deref(m_compileIndex);
}
break;
}
case BitAnd:
case BitOr:
case BitXor:
case BitRShift:
case BitLShift:
case BitURShift: {
fixIntEdge(node.children.child1());
fixIntEdge(node.children.child2());
break;
}
case CompareEq:
case CompareLess:
case CompareLessEq:
case CompareGreater:
case CompareGreaterEq:
case CompareStrictEq: {
if (Node::shouldSpeculateInteger(m_graph[node.child1()], m_graph[node.child2()]))
break;
if (!Node::shouldSpeculateNumber(m_graph[node.child1()], m_graph[node.child2()]))
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case LogicalNot: {
if (m_graph[node.child1()].shouldSpeculateInteger())
break;
if (!m_graph[node.child1()].shouldSpeculateNumber())
break;
fixDoubleEdge(0);
break;
}
case Branch: {
if (!m_graph[node.child1()].shouldSpeculateInteger()
&& m_graph[node.child1()].shouldSpeculateNumber())
fixDoubleEdge(0);
Node& myNode = m_graph[m_compileIndex]; // reload because the graph may have changed
Edge logicalNotEdge = myNode.child1();
Node& logicalNot = m_graph[logicalNotEdge];
if (logicalNot.op() == LogicalNot
&& logicalNot.adjustedRefCount() == 1) {
Edge newChildEdge = logicalNot.child1();
if (m_graph[newChildEdge].hasBooleanResult()) {
m_graph.ref(newChildEdge);
m_graph.deref(logicalNotEdge);
myNode.children.setChild1(newChildEdge);
BlockIndex toBeTaken = myNode.notTakenBlockIndex();
BlockIndex toBeNotTaken = myNode.takenBlockIndex();
myNode.setTakenBlockIndex(toBeTaken);
myNode.setNotTakenBlockIndex(toBeNotTaken);
}
}
break;
}
case SetLocal: {
if (node.variableAccessData()->isCaptured())
break;
if (!node.variableAccessData()->shouldUseDoubleFormat())
break;
fixDoubleEdge(0);
break;
}
case ArithAdd:
case ValueAdd: {
if (m_graph.addShouldSpeculateInteger(node))
break;
if (!Node::shouldSpeculateNumber(m_graph[node.child1()], m_graph[node.child2()]))
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithSub: {
if (m_graph.addShouldSpeculateInteger(node)
&& node.canSpeculateInteger())
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithNegate: {
if (m_graph.negateShouldSpeculateInteger(node))
break;
fixDoubleEdge(0);
break;
}
case ArithMin:
case ArithMax:
case ArithMod: {
if (Node::shouldSpeculateInteger(m_graph[node.child1()], m_graph[node.child2()])
&& node.canSpeculateInteger())
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithMul: {
if (m_graph.mulShouldSpeculateInteger(node))
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithDiv: {
if (Node::shouldSpeculateInteger(m_graph[node.child1()], m_graph[node.child2()])
&& node.canSpeculateInteger()) {
if (isX86())
break;
fixDoubleEdge(0);
fixDoubleEdge(1);
Node& oldDivision = m_graph[m_compileIndex];
Node newDivision = oldDivision;
newDivision.setRefCount(2);
newDivision.predict(SpecDouble);
NodeIndex newDivisionIndex = m_graph.size();
oldDivision.setOp(DoubleAsInt32);
oldDivision.children.initialize(Edge(newDivisionIndex, DoubleUse), Edge(), Edge());
m_graph.append(newDivision);
m_insertionSet.append(m_indexInBlock, newDivisionIndex);
break;
}
fixDoubleEdge(0);
fixDoubleEdge(1);
break;
}
case ArithAbs: {
if (m_graph[node.child1()].shouldSpeculateInteger()
&& node.canSpeculateInteger())
break;
fixDoubleEdge(0);
break;
}
case ArithSqrt: {
fixDoubleEdge(0);
break;
}
case PutByVal:
case PutByValSafe: {
Edge child1 = m_graph.varArgChild(node, 0);
Edge child2 = m_graph.varArgChild(node, 1);
Edge child3 = m_graph.varArgChild(node, 2);
if (!m_graph[child1].prediction() || !m_graph[child2].prediction())
break;
if (!m_graph[child2].shouldSpeculateInteger())
break;
if (isActionableIntMutableArraySpeculation(m_graph[child1].prediction())) {
if (m_graph[child3].isConstant())
break;
if (m_graph[child3].shouldSpeculateInteger())
break;
fixDoubleEdge(2);
break;
}
if (isActionableFloatMutableArraySpeculation(m_graph[child1].prediction())) {
fixDoubleEdge(2);
break;
}
break;
}
default:
break;
}
#if DFG_ENABLE(DEBUG_PROPAGATION_VERBOSE)
if (!(node.flags() & NodeHasVarArgs)) {
dataLog("new children: ");
node.dumpChildren(WTF::dataFile());
}
dataLog("\n");
#endif
}
void Heap::collect(SweepToggle sweepToggle)
{
SamplingRegion samplingRegion("Garbage Collection");
GCPHASE(Collect);
ASSERT(globalData()->identifierTable == wtfThreadData().currentIdentifierTable());
ASSERT(m_isSafeToCollect);
JAVASCRIPTCORE_GC_BEGIN();
m_activityCallback->willCollect();
double lastGCStartTime = WTF::currentTime();
if (lastGCStartTime - m_lastCodeDiscardTime > minute) {
discardAllCompiledCode();
m_lastCodeDiscardTime = WTF::currentTime();
}
#if ENABLE(GGC)
bool fullGC = sweepToggle == DoSweep;
if (!fullGC)
fullGC = (capacity() > 4 * m_sizeAfterLastCollect);
#else
bool fullGC = true;
#endif
{
GCPHASE(Canonicalize);
canonicalizeCellLivenessData();
}
markRoots(fullGC);
{
GCPHASE(FinalizeUnconditionalFinalizers);
finalizeUnconditionalFinalizers();
}
{
GCPHASE(FinalizeWeakHandles);
m_weakSet.sweep();
m_globalData->smallStrings.finalizeSmallStrings();
}
JAVASCRIPTCORE_GC_MARKED();
{
GCPHASE(ResetAllocator);
resetAllocators();
}
{
GCPHASE(DeleteCodeBlocks);
m_dfgCodeBlocks.deleteUnmarkedJettisonedCodeBlocks();
}
if (sweepToggle == DoSweep) {
SamplingRegion samplingRegion("Garbage Collection: Sweeping");
GCPHASE(Sweeping);
sweep();
m_objectSpace.shrink();
m_weakSet.shrink();
}
// To avoid pathological GC churn in large heaps, we set the new allocation
// limit to be the current size of the heap. This heuristic
// is a bit arbitrary. Using the current size of the heap after this
// collection gives us a 2X multiplier, which is a 1:1 (heap size :
// new bytes allocated) proportion, and seems to work well in benchmarks.
size_t newSize = size();
if (fullGC) {
m_sizeAfterLastCollect = newSize;
m_bytesAllocatedLimit = max(newSize, m_minBytesPerCycle);
}
m_bytesAllocated = 0;
double lastGCEndTime = WTF::currentTime();
m_lastGCLength = lastGCEndTime - lastGCStartTime;
JAVASCRIPTCORE_GC_END();
}
void Heap::addFinalizer(JSCell* cell, Finalizer finalizer)
{
Weak<JSCell> weak(*globalData(), cell, &m_finalizerOwner, reinterpret_cast<void*>(finalizer));
weak.leakHandle(); // Balanced by FinalizerOwner::finalize().
}
Foam::polyMesh::polyMesh(const IOobject& io)
:
objectRegistry(io),
primitiveMesh(),
allPoints_
(
IOobject
(
"points",
time().findInstance(meshDir(), "points"),
meshSubDir,
*this,
IOobject::MUST_READ,
IOobject::NO_WRITE
)
),
// To be re-sliced later. HJ, 19/oct/2008
points_(allPoints_, allPoints_.size()),
allFaces_
(
IOobject
(
"faces",
time().findInstance(meshDir(), "faces"),
meshSubDir,
*this,
IOobject::MUST_READ,
IOobject::NO_WRITE
)
),
// To be re-sliced later. HJ, 19/oct/2008
faces_(allFaces_, allFaces_.size()),
owner_
(
IOobject
(
"owner",
time().findInstance(meshDir(), "faces"),
meshSubDir,
*this,
IOobject::READ_IF_PRESENT,
IOobject::NO_WRITE
)
),
neighbour_
(
IOobject
(
"neighbour",
time().findInstance(meshDir(), "faces"),
meshSubDir,
*this,
IOobject::READ_IF_PRESENT,
IOobject::NO_WRITE
)
),
clearedPrimitives_(false),
boundary_
(
IOobject
(
"boundary",
time().findInstance(meshDir(), "boundary"),
meshSubDir,
*this,
IOobject::MUST_READ,
IOobject::NO_WRITE
),
*this
),
bounds_(allPoints_),
geometricD_(Vector<label>::zero),
solutionD_(Vector<label>::zero),
pointZones_
(
IOobject
(
"pointZones",
time().findInstance
(
meshDir(),
"pointZones",
IOobject::READ_IF_PRESENT
),
meshSubDir,
*this,
IOobject::READ_IF_PRESENT,
IOobject::NO_WRITE
),
*this
),
faceZones_
(
IOobject
(
"faceZones",
time().findInstance
(
meshDir(),
"faceZones",
IOobject::READ_IF_PRESENT
),
meshSubDir,
*this,
IOobject::READ_IF_PRESENT,
IOobject::NO_WRITE
),
*this
),
cellZones_
(
IOobject
(
"cellZones",
time().findInstance
(
meshDir(),
"cellZones",
IOobject::READ_IF_PRESENT
),
meshSubDir,
*this,
IOobject::READ_IF_PRESENT,
IOobject::NO_WRITE
),
*this
),
globalMeshDataPtr_(NULL),
moving_(false),
changing_(false),
curMotionTimeIndex_(time().timeIndex()),
oldAllPointsPtr_(NULL),
oldPointsPtr_(NULL)
{
if (exists(owner_.objectPath()))
{
initMesh();
}
else
{
cellIOList cLst
(
IOobject
(
"cells",
// Find the cells file on the basis of the faces file
// HJ, 8/Jul/2009
// time().findInstance(meshDir(), "cells"),
time().findInstance(meshDir(), "faces"),
meshSubDir,
*this,
IOobject::MUST_READ,
IOobject::NO_WRITE
)
);
// Set the primitive mesh
initMesh(cLst);
owner_.write();
neighbour_.write();
}
// Calculate topology for the patches (processor-processor comms etc.)
boundary_.updateMesh();
// Calculate the geometry for the patches (transformation tensors etc.)
boundary_.calcGeometry();
// Warn if global empty mesh (constructs globalData!)
if (globalData().nTotalPoints() == 0)
{
WarningIn("polyMesh(const IOobject&)")
<< "no points in mesh" << endl;
}
if (globalData().nTotalCells() == 0)
{
WarningIn("polyMesh(const IOobject&)")
<< "no cells in mesh" << endl;
}
}
void Heap::collect(SweepToggle sweepToggle)
{
SamplingRegion samplingRegion("Garbage Collection");
GCPHASE(Collect);
ASSERT(globalData()->apiLock().currentThreadIsHoldingLock());
RELEASE_ASSERT(globalData()->identifierTable == wtfThreadData().currentIdentifierTable());
ASSERT(m_isSafeToCollect);
JAVASCRIPTCORE_GC_BEGIN();
RELEASE_ASSERT(m_operationInProgress == NoOperation);
m_operationInProgress = Collection;
m_activityCallback->willCollect();
double lastGCStartTime = WTF::currentTime();
if (lastGCStartTime - m_lastCodeDiscardTime > minute) {
deleteAllCompiledCode();
m_lastCodeDiscardTime = WTF::currentTime();
}
{
GCPHASE(Canonicalize);
m_objectSpace.canonicalizeCellLivenessData();
}
markRoots();
{
GCPHASE(ReapingWeakHandles);
m_objectSpace.reapWeakSets();
}
JAVASCRIPTCORE_GC_MARKED();
{
m_blockSnapshot.resize(m_objectSpace.blocks().set().size());
MarkedBlockSnapshotFunctor functor(m_blockSnapshot);
m_objectSpace.forEachBlock(functor);
}
copyBackingStores();
{
GCPHASE(FinalizeUnconditionalFinalizers);
finalizeUnconditionalFinalizers();
}
{
GCPHASE(finalizeSmallStrings);
m_globalData->smallStrings.finalizeSmallStrings();
}
{
GCPHASE(DeleteCodeBlocks);
deleteUnmarkedCompiledCode();
}
{
GCPHASE(DeleteSourceProviderCaches);
m_globalData->clearSourceProviderCaches();
}
if (sweepToggle == DoSweep) {
SamplingRegion samplingRegion("Garbage Collection: Sweeping");
GCPHASE(Sweeping);
m_objectSpace.sweep();
m_objectSpace.shrink();
}
m_sweeper->startSweeping(m_blockSnapshot);
m_bytesAbandoned = 0;
{
GCPHASE(ResetAllocators);
m_objectSpace.resetAllocators();
}
size_t currentHeapSize = size();
if (Options::gcMaxHeapSize() && currentHeapSize > Options::gcMaxHeapSize())
HeapStatistics::exitWithFailure();
m_sizeAfterLastCollect = currentHeapSize;
// To avoid pathological GC churn in very small and very large heaps, we set
// the new allocation limit based on the current size of the heap, with a
// fixed minimum.
size_t maxHeapSize = max(minHeapSize(m_heapType, m_ramSize), proportionalHeapSize(currentHeapSize, m_ramSize));
m_bytesAllocatedLimit = maxHeapSize - currentHeapSize;
m_bytesAllocated = 0;
double lastGCEndTime = WTF::currentTime();
m_lastGCLength = lastGCEndTime - lastGCStartTime;
if (Options::recordGCPauseTimes())
HeapStatistics::recordGCPauseTime(lastGCStartTime, lastGCEndTime);
RELEASE_ASSERT(m_operationInProgress == Collection);
m_operationInProgress = NoOperation;
JAVASCRIPTCORE_GC_END();
if (Options::useZombieMode())
zombifyDeadObjects();
if (Options::objectsAreImmortal())
markDeadObjects();
if (Options::showObjectStatistics())
HeapStatistics::showObjectStatistics(this);
}
void JITCompiler::link(LinkBuffer& linkBuffer)
{
// Link the code, populate data in CodeBlock data structures.
#if DFG_ENABLE(DEBUG_VERBOSE)
fprintf(stderr, "JIT code for %p start at [%p, %p). Size = %lu.\n", m_codeBlock, linkBuffer.debugAddress(), static_cast<char*>(linkBuffer.debugAddress()) + linkBuffer.debugSize(), linkBuffer.debugSize());
#endif
// Link all calls out from the JIT code to their respective functions.
for (unsigned i = 0; i < m_calls.size(); ++i)
linkBuffer.link(m_calls[i].m_call, m_calls[i].m_function);
if (m_codeBlock->needsCallReturnIndices()) {
m_codeBlock->callReturnIndexVector().reserveCapacity(m_exceptionChecks.size());
for (unsigned i = 0; i < m_exceptionChecks.size(); ++i) {
unsigned returnAddressOffset = linkBuffer.returnAddressOffset(m_exceptionChecks[i].m_call);
CodeOrigin codeOrigin = m_exceptionChecks[i].m_codeOrigin;
while (codeOrigin.inlineCallFrame)
codeOrigin = codeOrigin.inlineCallFrame->caller;
unsigned exceptionInfo = codeOrigin.bytecodeIndex;
m_codeBlock->callReturnIndexVector().append(CallReturnOffsetToBytecodeOffset(returnAddressOffset, exceptionInfo));
}
}
unsigned numCallsFromInlineCode = 0;
for (unsigned i = 0; i < m_exceptionChecks.size(); ++i) {
if (m_exceptionChecks[i].m_codeOrigin.inlineCallFrame)
numCallsFromInlineCode++;
}
if (numCallsFromInlineCode) {
Vector<CodeOriginAtCallReturnOffset>& codeOrigins = m_codeBlock->codeOrigins();
codeOrigins.resize(numCallsFromInlineCode);
for (unsigned i = 0, j = 0; i < m_exceptionChecks.size(); ++i) {
CallExceptionRecord& record = m_exceptionChecks[i];
if (record.m_codeOrigin.inlineCallFrame) {
unsigned returnAddressOffset = linkBuffer.returnAddressOffset(m_exceptionChecks[i].m_call);
codeOrigins[j].codeOrigin = record.m_codeOrigin;
codeOrigins[j].callReturnOffset = returnAddressOffset;
j++;
}
}
}
m_codeBlock->setNumberOfStructureStubInfos(m_propertyAccesses.size());
for (unsigned i = 0; i < m_propertyAccesses.size(); ++i) {
StructureStubInfo& info = m_codeBlock->structureStubInfo(i);
CodeLocationCall callReturnLocation = linkBuffer.locationOf(m_propertyAccesses[i].m_functionCall);
info.callReturnLocation = callReturnLocation;
info.deltaCheckImmToCall = differenceBetweenCodePtr(linkBuffer.locationOf(m_propertyAccesses[i].m_deltaCheckImmToCall), callReturnLocation);
info.deltaCallToStructCheck = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_deltaCallToStructCheck));
#if USE(JSVALUE64)
info.deltaCallToLoadOrStore = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_deltaCallToLoadOrStore));
#else
info.deltaCallToTagLoadOrStore = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_deltaCallToTagLoadOrStore));
info.deltaCallToPayloadLoadOrStore = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_deltaCallToPayloadLoadOrStore));
#endif
info.deltaCallToSlowCase = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_deltaCallToSlowCase));
info.deltaCallToDone = differenceBetweenCodePtr(callReturnLocation, linkBuffer.locationOf(m_propertyAccesses[i].m_deltaCallToDone));
info.baseGPR = m_propertyAccesses[i].m_baseGPR;
#if USE(JSVALUE64)
info.valueGPR = m_propertyAccesses[i].m_valueGPR;
#else
info.valueTagGPR = m_propertyAccesses[i].m_valueTagGPR;
info.valueGPR = m_propertyAccesses[i].m_valueGPR;
#endif
info.scratchGPR = m_propertyAccesses[i].m_scratchGPR;
}
m_codeBlock->setNumberOfCallLinkInfos(m_jsCalls.size());
for (unsigned i = 0; i < m_jsCalls.size(); ++i) {
CallLinkInfo& info = m_codeBlock->callLinkInfo(i);
info.callType = m_jsCalls[i].m_callType;
info.isDFG = true;
info.callReturnLocation = CodeLocationLabel(linkBuffer.locationOf(m_jsCalls[i].m_slowCall));
info.hotPathBegin = linkBuffer.locationOf(m_jsCalls[i].m_targetToCheck);
info.hotPathOther = linkBuffer.locationOfNearCall(m_jsCalls[i].m_fastCall);
}
MacroAssemblerCodeRef osrExitThunk = globalData()->getCTIStub(osrExitGenerationThunkGenerator);
CodeLocationLabel target = CodeLocationLabel(osrExitThunk.code());
for (unsigned i = 0; i < codeBlock()->numberOfOSRExits(); ++i) {
OSRExit& exit = codeBlock()->osrExit(i);
linkBuffer.link(exit.m_check.lateJump(), target);
exit.m_check.correctLateJump(linkBuffer);
}
codeBlock()->shrinkWeakReferencesToFit();
codeBlock()->shrinkWeakReferenceTransitionsToFit();
}