PassRefPtr<CodeBlock> ScriptExecutable::newReplacementCodeBlockFor(
CodeSpecializationKind kind)
{
if (classInfo() == EvalExecutable::info()) {
RELEASE_ASSERT(kind == CodeForCall);
EvalExecutable* executable = jsCast<EvalExecutable*>(this);
EvalCodeBlock* baseline = static_cast<EvalCodeBlock*>(
executable->m_evalCodeBlock->baselineVersion());
RefPtr<EvalCodeBlock> result = adoptRef(new EvalCodeBlock(
CodeBlock::CopyParsedBlock, *baseline));
result->setAlternative(baseline);
return result;
}
if (classInfo() == ProgramExecutable::info()) {
RELEASE_ASSERT(kind == CodeForCall);
ProgramExecutable* executable = jsCast<ProgramExecutable*>(this);
ProgramCodeBlock* baseline = static_cast<ProgramCodeBlock*>(
executable->m_programCodeBlock->baselineVersion());
RefPtr<ProgramCodeBlock> result = adoptRef(new ProgramCodeBlock(
CodeBlock::CopyParsedBlock, *baseline));
result->setAlternative(baseline);
return result;
}
RELEASE_ASSERT(classInfo() == FunctionExecutable::info());
FunctionExecutable* executable = jsCast<FunctionExecutable*>(this);
FunctionCodeBlock* baseline = static_cast<FunctionCodeBlock*>(
executable->codeBlockFor(kind)->baselineVersion());
RefPtr<FunctionCodeBlock> result = adoptRef(new FunctionCodeBlock(
CodeBlock::CopyParsedBlock, *baseline));
result->setAlternative(baseline);
return result;
}
bool ClonedArguments::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName ident, PropertySlot& slot)
{
ClonedArguments* thisObject = jsCast<ClonedArguments*>(object);
VM& vm = exec->vm();
if (!thisObject->specialsMaterialized()) {
FunctionExecutable* executable = jsCast<FunctionExecutable*>(thisObject->m_callee->executable());
bool isStrictMode = executable->isStrictMode();
if (ident == vm.propertyNames->callee) {
if (isStrictMode) {
slot.setGetterSlot(thisObject, DontDelete | DontEnum | Accessor, thisObject->globalObject()->throwTypeErrorArgumentsCalleeAndCallerGetterSetter());
return true;
}
slot.setValue(thisObject, 0, thisObject->m_callee.get());
return true;
}
if (ident == vm.propertyNames->iteratorSymbol) {
slot.setValue(thisObject, DontEnum, thisObject->globalObject()->arrayProtoValuesFunction());
return true;
}
}
return Base::getOwnPropertySlot(thisObject, exec, ident, slot);
}
EncodedJSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec)
{
JSValue thisValue = exec->thisValue();
if (thisValue.inherits(JSFunction::info())) {
JSFunction* function = jsCast<JSFunction*>(thisValue);
if (function->isHostOrBuiltinFunction()) {
String name;
if (JSBoundFunction* boundFunction = jsDynamicCast<JSBoundFunction*>(function))
name = boundFunction->toStringName(exec);
else
name = function->name(exec);
return JSValue::encode(jsMakeNontrivialString(exec, "function ", name, "() {\n [native code]\n}"));
}
FunctionExecutable* executable = function->jsExecutable();
String functionHeader = executable->isArrowFunction() ? "" : "function ";
StringView source = executable->source().provider()->getRange(
executable->parametersStartOffset(),
executable->parametersStartOffset() + executable->source().length());
return JSValue::encode(jsMakeNontrivialString(exec, functionHeader, function->name(exec), source));
}
if (thisValue.inherits(InternalFunction::info())) {
InternalFunction* function = asInternalFunction(thisValue);
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}"));
}
return throwVMTypeError(exec);
}
void operator()(JSCell* cell)
{
if (!cell->inherits(&FunctionExecutable::s_info))
return;
FunctionExecutable* executable = static_cast<FunctionExecutable*>(cell);
if (currentlyExecutingFunctions.contains(executable))
return;
executable->discardCode();
}
inline void operator()(JSCell* cell)
{
if (!cell->inherits(FunctionExecutable::info()))
return;
FunctionExecutable* executable = jsCast<FunctionExecutable*>(cell);
executable->clearCodeIfNotCompiling();
executable->clearUnlinkedCodeForRecompilationIfNotCompiling();
}
inline void visit(JSCell* cell)
{
if (!cell->inherits(FunctionExecutable::info()))
return;
FunctionExecutable* executable = jsCast<FunctionExecutable*>(cell);
executable->clearCode();
executable->clearUnlinkedCodeForRecompilation();
}
void operator()(JSCell* cell)
{
if (!cell->inherits(&FunctionExecutable::s_info))
return;
FunctionExecutable* executable = jsCast<FunctionExecutable*>(cell);
if (currentlyExecutingFunctions.contains(executable))
return;
executable->clearCodeIfNotCompiling();
}
void Heap::discardAllCompiledCode()
{
// If JavaScript is running, it's not safe to recompile, since we'll end
// up throwing away code that is live on the stack.
if (m_globalData->dynamicGlobalObject)
return;
for (FunctionExecutable* current = m_functions.head(); current; current = current->next())
current->discardCode();
}
RefPtr<CodeBlock> ScriptExecutable::newCodeBlockFor(
CodeSpecializationKind kind, JSFunction* function, JSScope* scope, JSObject*& exception)
{
VM* vm = scope->vm();
ASSERT(vm->heap.isDeferred());
ASSERT(startColumn() != UINT_MAX);
ASSERT(endColumn() != UINT_MAX);
if (classInfo() == EvalExecutable::info()) {
EvalExecutable* executable = jsCast<EvalExecutable*>(this);
RELEASE_ASSERT(kind == CodeForCall);
RELEASE_ASSERT(!executable->m_evalCodeBlock);
RELEASE_ASSERT(!function);
return adoptRef(new EvalCodeBlock(
executable, executable->m_unlinkedEvalCodeBlock.get(), scope,
executable->source().provider()));
}
if (classInfo() == ProgramExecutable::info()) {
ProgramExecutable* executable = jsCast<ProgramExecutable*>(this);
RELEASE_ASSERT(kind == CodeForCall);
RELEASE_ASSERT(!executable->m_programCodeBlock);
RELEASE_ASSERT(!function);
return adoptRef(new ProgramCodeBlock(
executable, executable->m_unlinkedProgramCodeBlock.get(), scope,
executable->source().provider(), executable->source().startColumn()));
}
RELEASE_ASSERT(classInfo() == FunctionExecutable::info());
RELEASE_ASSERT(function);
FunctionExecutable* executable = jsCast<FunctionExecutable*>(this);
RELEASE_ASSERT(!executable->codeBlockFor(kind));
JSGlobalObject* globalObject = scope->globalObject();
ParserError error;
DebuggerMode debuggerMode = globalObject->hasDebugger() ? DebuggerOn : DebuggerOff;
ProfilerMode profilerMode = globalObject->hasProfiler() ? ProfilerOn : ProfilerOff;
UnlinkedFunctionCodeBlock* unlinkedCodeBlock =
executable->m_unlinkedExecutable->codeBlockFor(*vm, executable->m_source, kind, debuggerMode, profilerMode, error, executable->isArrowFunction());
recordParse(executable->m_unlinkedExecutable->features(), executable->m_unlinkedExecutable->hasCapturedVariables(), firstLine(), lastLine(), startColumn(), endColumn());
if (!unlinkedCodeBlock) {
exception = vm->throwException(
globalObject->globalExec(),
error.toErrorObject(globalObject, executable->m_source));
return nullptr;
}
SourceProvider* provider = executable->source().provider();
unsigned sourceOffset = executable->source().startOffset();
unsigned startColumn = executable->source().startColumn();
return adoptRef(new FunctionCodeBlock(
executable, unlinkedCodeBlock, scope, provider, sourceOffset, startColumn));
}
CodeBlock* getSomeBaselineCodeBlockForFunction(JSValue theFunctionValue)
{
FunctionExecutable* executable = getExecutableForFunction(theFunctionValue);
if (!executable)
return 0;
CodeBlock* baselineCodeBlock = executable->baselineCodeBlockFor(CodeForCall);
if (!baselineCodeBlock)
baselineCodeBlock = executable->baselineCodeBlockFor(CodeForConstruct);
return baselineCodeBlock;
}
void FunctionExecutable::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
FunctionExecutable* thisObject = jsCast<FunctionExecutable*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
ScriptExecutable::visitChildren(thisObject, visitor);
if (thisObject->m_codeBlockForCall)
thisObject->m_codeBlockForCall->visitAggregate(visitor);
if (thisObject->m_codeBlockForConstruct)
thisObject->m_codeBlockForConstruct->visitAggregate(visitor);
visitor.append(&thisObject->m_unlinkedExecutable);
}
JSCell* DFG_OPERATION operationNewFunctionExpression(ExecState* exec, JSCell* functionExecutableAsCell)
{
ASSERT(functionExecutableAsCell->inherits(&FunctionExecutable::s_info));
FunctionExecutable* functionExecutable =
static_cast<FunctionExecutable*>(functionExecutableAsCell);
JSFunction *function = functionExecutable->make(exec, exec->scopeChain());
if (!functionExecutable->name().isNull()) {
JSStaticScopeObject* functionScopeObject =
JSStaticScopeObject::create(
exec, functionExecutable->name(), function, ReadOnly | DontDelete);
function->setScope(exec->globalData(), function->scope()->push(functionScopeObject));
}
return function;
}
void ClonedArguments::materializeSpecials(ExecState* exec)
{
RELEASE_ASSERT(!specialsMaterialized());
VM& vm = exec->vm();
FunctionExecutable* executable = jsCast<FunctionExecutable*>(m_callee->executable());
bool isStrictMode = executable->isStrictMode();
if (isStrictMode)
putDirectAccessor(exec, vm.propertyNames->callee, globalObject()->throwTypeErrorArgumentsCalleeAndCallerGetterSetter(), DontDelete | DontEnum | Accessor);
else
putDirect(vm, vm.propertyNames->callee, JSValue(m_callee.get()));
putDirect(vm, vm.propertyNames->iteratorSymbol, globalObject()->arrayProtoValuesFunction(), DontEnum);
m_callee.clear();
}
CodeBlock* ScriptExecutable::newReplacementCodeBlockFor(
CodeSpecializationKind kind)
{
if (classInfo() == EvalExecutable::info()) {
RELEASE_ASSERT(kind == CodeForCall);
EvalExecutable* executable = jsCast<EvalExecutable*>(this);
EvalCodeBlock* baseline = static_cast<EvalCodeBlock*>(
executable->m_evalCodeBlock->baselineVersion());
EvalCodeBlock* result = EvalCodeBlock::create(vm(),
CodeBlock::CopyParsedBlock, *baseline);
result->setAlternative(*vm(), baseline);
return result;
}
if (classInfo() == ProgramExecutable::info()) {
RELEASE_ASSERT(kind == CodeForCall);
ProgramExecutable* executable = jsCast<ProgramExecutable*>(this);
ProgramCodeBlock* baseline = static_cast<ProgramCodeBlock*>(
executable->m_programCodeBlock->baselineVersion());
ProgramCodeBlock* result = ProgramCodeBlock::create(vm(),
CodeBlock::CopyParsedBlock, *baseline);
result->setAlternative(*vm(), baseline);
return result;
}
if (classInfo() == ModuleProgramExecutable::info()) {
RELEASE_ASSERT(kind == CodeForCall);
ModuleProgramExecutable* executable = jsCast<ModuleProgramExecutable*>(this);
ModuleProgramCodeBlock* baseline = static_cast<ModuleProgramCodeBlock*>(
executable->m_moduleProgramCodeBlock->baselineVersion());
ModuleProgramCodeBlock* result = ModuleProgramCodeBlock::create(vm(),
CodeBlock::CopyParsedBlock, *baseline);
result->setAlternative(*vm(), baseline);
return result;
}
RELEASE_ASSERT(classInfo() == FunctionExecutable::info());
FunctionExecutable* executable = jsCast<FunctionExecutable*>(this);
FunctionCodeBlock* baseline = static_cast<FunctionCodeBlock*>(
executable->codeBlockFor(kind)->baselineVersion());
FunctionCodeBlock* result = FunctionCodeBlock::create(vm(),
CodeBlock::CopyParsedBlock, *baseline);
result->setAlternative(*vm(), baseline);
return result;
}
FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, int overrideLineNumber)
{
SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
unsigned firstLine = source.firstLine() + m_firstLineOffset;
unsigned startOffset = source.startOffset() + m_startOffset;
// Adjust to one-based indexing.
bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
bool endColumnIsOnStartLine = !m_lineCount;
unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + m_lineCount, startColumn, endColumn);
if (overrideLineNumber != -1)
result->setOverrideLineNumber(overrideLineNumber);
return result;
}
void prepareCodeOriginForOSRExit(ExecState* exec, CodeOrigin codeOrigin)
{
VM& vm = exec->vm();
DeferGC deferGC(vm.heap);
for (; codeOrigin.inlineCallFrame; codeOrigin = codeOrigin.inlineCallFrame->caller) {
FunctionExecutable* executable =
static_cast<FunctionExecutable*>(codeOrigin.inlineCallFrame->executable.get());
CodeBlock* codeBlock = executable->baselineCodeBlockFor(
codeOrigin.inlineCallFrame->specializationKind());
if (codeBlock->jitType() == JSC::JITCode::BaselineJIT)
continue;
ASSERT(codeBlock->jitType() == JSC::JITCode::InterpreterThunk);
JIT::compile(&vm, codeBlock, JITCompilationMustSucceed);
codeBlock->install();
}
}
void Debugger::recompileAllJSFunctions(JSGlobalData* globalData)
{
// If JavaScript is running, it's not safe to recompile, since we'll end
// up throwing away code that is live on the stack.
ASSERT(!globalData->dynamicGlobalObject);
if (globalData->dynamicGlobalObject)
return;
typedef HashSet<FunctionExecutable*> FunctionExecutableSet;
typedef HashMap<SourceProvider*, ExecState*> SourceProviderMap;
FunctionExecutableSet functionExecutables;
SourceProviderMap sourceProviders;
LiveObjectIterator it = globalData->heap.primaryHeapBegin();
LiveObjectIterator heapEnd = globalData->heap.primaryHeapEnd();
for ( ; it != heapEnd; ++it) {
if (!(*it)->inherits(&JSFunction::info))
continue;
JSFunction* function = asFunction(*it);
if (function->executable()->isHostFunction())
continue;
FunctionExecutable* executable = function->jsExecutable();
// Check if the function is already in the set - if so,
// we've already retranslated it, nothing to do here.
if (!functionExecutables.add(executable).second)
continue;
ExecState* exec = function->scope().globalObject()->JSGlobalObject::globalExec();
executable->recompile(exec);
if (function->scope().globalObject()->debugger() == this)
sourceProviders.add(executable->source().provider(), exec);
}
// Call sourceParsed() after reparsing all functions because it will execute
// JavaScript in the inspector.
SourceProviderMap::const_iterator end = sourceProviders.end();
for (SourceProviderMap::const_iterator iter = sourceProviders.begin(); iter != end; ++iter)
sourceParsed(iter->second, SourceCode(iter->first), -1, UString());
}
EncodedJSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec)
{
JSValue thisValue = exec->thisValue();
if (thisValue.inherits(JSFunction::info())) {
JSFunction* function = jsCast<JSFunction*>(thisValue);
if (function->isHostOrBuiltinFunction())
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}"));
FunctionExecutable* executable = function->jsExecutable();
String sourceString = executable->source().toString();
insertSemicolonIfNeeded(sourceString, executable->bodyIncludesBraces());
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "(", executable->paramString(), ") ", sourceString));
}
if (thisValue.inherits(InternalFunction::info())) {
InternalFunction* function = asInternalFunction(thisValue);
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}"));
}
return throwVMTypeError(exec);
}
EncodedTiValue JSC_HOST_CALL functionProtoFuncToString(TiExcState* exec)
{
TiValue thisValue = exec->hostThisValue();
if (thisValue.inherits(&TiFunction::s_info)) {
TiFunction* function = asFunction(thisValue);
if (function->isHostFunction())
return TiValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}"));
FunctionExecutable* executable = function->jsExecutable();
UString sourceString = executable->source().toString();
insertSemicolonIfNeeded(sourceString);
return TiValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "(", executable->paramString(), ") ", sourceString));
}
if (thisValue.inherits(&InternalFunction::s_info)) {
InternalFunction* function = asInternalFunction(thisValue);
return TiValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}"));
}
return throwVMTypeError(exec);
}
FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, Optional<int> overrideLineNumber, Intrinsic intrinsic)
{
SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
unsigned firstLine = source.firstLine() + m_firstLineOffset;
unsigned startOffset = source.startOffset() + m_startOffset;
unsigned lineCount = m_lineCount;
// Adjust to one-based indexing.
bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
bool endColumnIsOnStartLine = !lineCount;
unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
FunctionOverrides::OverrideInfo overrideInfo;
bool hasFunctionOverride = false;
if (UNLIKELY(Options::functionOverrides())) {
hasFunctionOverride = FunctionOverrides::initializeOverrideFor(code, overrideInfo);
if (hasFunctionOverride) {
firstLine = overrideInfo.firstLine;
lineCount = overrideInfo.lineCount;
startColumn = overrideInfo.startColumn;
endColumn = overrideInfo.endColumn;
code = overrideInfo.sourceCode;
}
}
FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + lineCount, startColumn, endColumn, intrinsic);
if (overrideLineNumber)
result->setOverrideLineNumber(*overrideLineNumber);
if (UNLIKELY(hasFunctionOverride)) {
result->overrideParameterAndTypeProfilingStartEndOffsets(
overrideInfo.parametersStartOffset,
overrideInfo.typeProfilingStartOffset,
overrideInfo.typeProfilingEndOffset);
}
return result;
}
inline void* virtualFor(ExecState* execCallee, CodeSpecializationKind kind)
{
ExecState* exec = execCallee->callerFrame();
JSValue calleeAsValue = execCallee->calleeAsValue();
JSCell* calleeAsFunctionCell = getJSFunction(calleeAsValue);
if (UNLIKELY(!calleeAsFunctionCell))
return handleHostCall(execCallee, calleeAsValue, kind);
JSFunction* function = asFunction(calleeAsFunctionCell);
execCallee->setScopeChain(function->scopeUnchecked());
ExecutableBase* executable = function->executable();
if (UNLIKELY(!executable->hasJITCodeFor(kind))) {
FunctionExecutable* functionExecutable = static_cast<FunctionExecutable*>(executable);
JSObject* error = functionExecutable->compileFor(execCallee, function->scope(), kind);
if (error) {
exec->globalData().exception = error;
return 0;
}
}
return executable->generatedJITCodeWithArityCheckFor(kind).executableAddress();
}
inline void* linkFor(ExecState* execCallee, ReturnAddressPtr returnAddress, CodeSpecializationKind kind)
{
ExecState* exec = execCallee->callerFrame();
JSGlobalData* globalData = &exec->globalData();
NativeCallFrameTracer tracer(globalData, exec);
JSValue calleeAsValue = execCallee->calleeAsValue();
JSCell* calleeAsFunctionCell = getJSFunction(calleeAsValue);
if (!calleeAsFunctionCell)
return handleHostCall(execCallee, calleeAsValue, kind);
JSFunction* callee = jsCast<JSFunction*>(calleeAsFunctionCell);
execCallee->setScopeChain(callee->scopeUnchecked());
ExecutableBase* executable = callee->executable();
MacroAssemblerCodePtr codePtr;
CodeBlock* codeBlock = 0;
if (executable->isHostFunction())
codePtr = executable->generatedJITCodeFor(kind).addressForCall();
else {
FunctionExecutable* functionExecutable = static_cast<FunctionExecutable*>(executable);
JSObject* error = functionExecutable->compileFor(execCallee, callee->scope(), kind);
if (error) {
globalData->exception = createStackOverflowError(exec);
return 0;
}
codeBlock = &functionExecutable->generatedBytecodeFor(kind);
if (execCallee->argumentCountIncludingThis() < static_cast<size_t>(codeBlock->numParameters()))
codePtr = functionExecutable->generatedJITCodeWithArityCheckFor(kind);
else
codePtr = functionExecutable->generatedJITCodeFor(kind).addressForCall();
}
CallLinkInfo& callLinkInfo = exec->codeBlock()->getCallLinkInfo(returnAddress);
if (!callLinkInfo.seenOnce())
callLinkInfo.setSeen();
else
dfgLinkFor(execCallee, callLinkInfo, codeBlock, callee, codePtr, kind);
return codePtr.executableAddress();
}
EncodedJSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec)
{
JSValue thisValue = exec->thisValue();
if (thisValue.inherits(JSFunction::info())) {
JSFunction* function = jsCast<JSFunction*>(thisValue);
if (function->isHostOrBuiltinFunction())
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}"));
FunctionExecutable* executable = function->jsExecutable();
String source = executable->source().provider()->getRange(
executable->parametersStartOffset(),
executable->typeProfilingEndOffset() + 1); // Type profiling end offset is the character before the '}'.
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), source));
}
if (thisValue.inherits(InternalFunction::info())) {
InternalFunction* function = asInternalFunction(thisValue);
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}"));
}
return throwVMTypeError(exec);
}
inline char* linkFor(ExecState* execCallee, CodeSpecializationKind kind)
{
ExecState* exec = execCallee->callerFrame();
VM* vm = &exec->vm();
NativeCallFrameTracer tracer(vm, exec);
JSValue calleeAsValue = execCallee->calleeAsValue();
JSCell* calleeAsFunctionCell = getJSFunction(calleeAsValue);
if (!calleeAsFunctionCell)
return reinterpret_cast<char*>(handleHostCall(execCallee, calleeAsValue, kind));
JSFunction* callee = jsCast<JSFunction*>(calleeAsFunctionCell);
execCallee->setScope(callee->scopeUnchecked());
ExecutableBase* executable = callee->executable();
MacroAssemblerCodePtr codePtr;
CodeBlock* codeBlock = 0;
if (executable->isHostFunction())
codePtr = executable->generatedJITCodeFor(kind)->addressForCall();
else {
FunctionExecutable* functionExecutable = static_cast<FunctionExecutable*>(executable);
JSObject* error = functionExecutable->prepareForExecution(execCallee, callee->scope(), kind);
if (error) {
vm->throwException(exec, createStackOverflowError(exec));
return reinterpret_cast<char*>(vm->getCTIStub(throwExceptionFromCallSlowPathGenerator).code().executableAddress());
}
codeBlock = functionExecutable->codeBlockFor(kind);
if (execCallee->argumentCountIncludingThis() < static_cast<size_t>(codeBlock->numParameters()))
codePtr = functionExecutable->generatedJITCodeWithArityCheckFor(kind);
else
codePtr = functionExecutable->generatedJITCodeFor(kind)->addressForCall();
}
CallLinkInfo& callLinkInfo = exec->codeBlock()->getCallLinkInfo(execCallee->returnPC());
if (!callLinkInfo.seenOnce())
callLinkInfo.setSeen();
else
linkFor(execCallee, callLinkInfo, codeBlock, callee, codePtr, kind);
return reinterpret_cast<char*>(codePtr.executableAddress());
}
FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& passedParentSource, std::optional<int> overrideLineNumber, Intrinsic intrinsic)
{
const SourceCode& parentSource = m_parentSourceOverride.isNull() ? passedParentSource : m_parentSourceOverride;
unsigned firstLine = parentSource.firstLine().oneBasedInt() + m_firstLineOffset;
unsigned startOffset = parentSource.startOffset() + m_startOffset;
unsigned lineCount = m_lineCount;
unsigned startColumn = linkedStartColumn(parentSource.startColumn().oneBasedInt());
unsigned endColumn = linkedEndColumn(startColumn);
SourceCode source(parentSource.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
FunctionOverrides::OverrideInfo overrideInfo;
bool hasFunctionOverride = false;
if (UNLIKELY(Options::functionOverrides())) {
hasFunctionOverride = FunctionOverrides::initializeOverrideFor(source, overrideInfo);
if (UNLIKELY(hasFunctionOverride)) {
firstLine = overrideInfo.firstLine;
lineCount = overrideInfo.lineCount;
startColumn = overrideInfo.startColumn;
endColumn = overrideInfo.endColumn;
source = overrideInfo.sourceCode;
}
}
FunctionExecutable* result = FunctionExecutable::create(vm, source, this, firstLine + lineCount, endColumn, intrinsic);
if (overrideLineNumber)
result->setOverrideLineNumber(*overrideLineNumber);
if (UNLIKELY(hasFunctionOverride)) {
result->overrideParameterAndTypeProfilingStartEndOffsets(
overrideInfo.parametersStartOffset,
overrideInfo.typeProfilingStartOffset,
overrideInfo.typeProfilingEndOffset);
}
return result;
}
JSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&)
{
if (thisValue.inherits(&JSFunction::info)) {
JSFunction* function = asFunction(thisValue);
if (!function->isHostFunction()) {
FunctionExecutable* executable = function->jsExecutable();
UString sourceString = executable->source().toString();
insertSemicolonIfNeeded(sourceString);
return jsString(exec, makeString("function ", function->name(exec), "(", executable->paramString(), ") ", sourceString));
}
}
if (thisValue.inherits(&InternalFunction::info)) {
InternalFunction* function = asInternalFunction(thisValue);
return jsString(exec, makeString("function ", function->name(exec), "() {\n [native code]\n}"));
}
#ifdef QT_BUILD_SCRIPT_LIB //same error message as in the old engine, and in mozilla
return throwError(exec, TypeError, "Function.prototype.toString called on incompatible object");
#else
return throwError(exec, TypeError);
#endif
}
void JSFunction::addNameScopeIfNeeded(VM& vm)
{
FunctionExecutable* executable = jsCast<FunctionExecutable*>(m_executable.get());
if (!functionNameIsInScope(executable->name(), executable->functionMode()))
return;
if (!functionNameScopeIsDynamic(executable->usesEval(), executable->isStrictMode()))
return;
m_scope.set(vm, this, JSNameScope::create(vm, m_scope->globalObject(), executable->name(), this, ReadOnly | DontDelete, m_scope.get()));
}
inline char* virtualForWithFunction(ExecState* execCallee, CodeSpecializationKind kind, JSCell*& calleeAsFunctionCell)
{
ExecState* exec = execCallee->callerFrame();
VM* vm = &exec->vm();
NativeCallFrameTracer tracer(vm, exec);
JSValue calleeAsValue = execCallee->calleeAsValue();
calleeAsFunctionCell = getJSFunction(calleeAsValue);
if (UNLIKELY(!calleeAsFunctionCell))
return reinterpret_cast<char*>(handleHostCall(execCallee, calleeAsValue, kind));
JSFunction* function = jsCast<JSFunction*>(calleeAsFunctionCell);
execCallee->setScope(function->scopeUnchecked());
ExecutableBase* executable = function->executable();
if (UNLIKELY(!executable->hasJITCodeFor(kind))) {
FunctionExecutable* functionExecutable = static_cast<FunctionExecutable*>(executable);
JSObject* error = functionExecutable->prepareForExecution(execCallee, function->scope(), kind);
if (error) {
exec->vm().throwException(execCallee, error);
return reinterpret_cast<char*>(vm->getCTIStub(throwExceptionFromCallSlowPathGenerator).code().executableAddress());
}
}
return reinterpret_cast<char*>(executable->generatedJITCodeWithArityCheckFor(kind).executableAddress());
}
void ExecutableBase::dump(PrintStream& out) const
{
ExecutableBase* realThis = const_cast<ExecutableBase*>(this);
if (classInfo() == NativeExecutable::info()) {
NativeExecutable* native = jsCast<NativeExecutable*>(realThis);
out.print("NativeExecutable:", RawPointer(bitwise_cast<void*>(native->function())), "/", RawPointer(bitwise_cast<void*>(native->constructor())));
return;
}
if (classInfo() == EvalExecutable::info()) {
EvalExecutable* eval = jsCast<EvalExecutable*>(realThis);
if (CodeBlock* codeBlock = eval->codeBlock())
out.print(*codeBlock);
else
out.print("EvalExecutable w/o CodeBlock");
return;
}
if (classInfo() == ProgramExecutable::info()) {
ProgramExecutable* eval = jsCast<ProgramExecutable*>(realThis);
if (CodeBlock* codeBlock = eval->codeBlock())
out.print(*codeBlock);
else
out.print("ProgramExecutable w/o CodeBlock");
return;
}
if (classInfo() == ModuleProgramExecutable::info()) {
ModuleProgramExecutable* executable = jsCast<ModuleProgramExecutable*>(realThis);
if (CodeBlock* codeBlock = executable->codeBlock())
out.print(*codeBlock);
else
out.print("ModuleProgramExecutable w/o CodeBlock");
return;
}
FunctionExecutable* function = jsCast<FunctionExecutable*>(realThis);
if (!function->eitherCodeBlock())
out.print("FunctionExecutable w/o CodeBlock");
else {
CommaPrinter comma("/");
if (function->codeBlockForCall())
out.print(comma, *function->codeBlockForCall());
if (function->codeBlockForConstruct())
out.print(comma, *function->codeBlockForConstruct());
}
}
EncodedJSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue thisValue = exec->thisValue();
if (thisValue.inherits(JSFunction::info())) {
JSFunction* function = jsCast<JSFunction*>(thisValue);
if (function->isHostOrBuiltinFunction())
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(vm), "() {\n [native code]\n}"));
FunctionExecutable* executable = function->jsExecutable();
if (executable->isClass()) {
StringView classSource = executable->classSource().view();
return JSValue::encode(jsString(exec, classSource.toStringWithoutCopying()));
}
String functionHeader = executable->isArrowFunction() ? "" : "function ";
StringView source = executable->source().provider()->getRange(
executable->parametersStartOffset(),
executable->parametersStartOffset() + executable->source().length());
return JSValue::encode(jsMakeNontrivialString(exec, functionHeader, function->name(vm), source));
}
if (thisValue.inherits(InternalFunction::info())) {
InternalFunction* function = asInternalFunction(thisValue);
return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(), "() {\n [native code]\n}"));
}
if (thisValue.isObject()) {
JSObject* object = asObject(thisValue);
if (object->inlineTypeFlags() & TypeOfShouldCallGetCallData) {
CallData callData;
if (object->methodTable(vm)->getCallData(object, callData) != CallType::None) {
if (auto* classInfo = object->classInfo())
return JSValue::encode(jsMakeNontrivialString(exec, "function ", classInfo->className, "() {\n [native code]\n}"));
}
}
}
return throwVMTypeError(exec, scope);
}
