Exemplo n.º 1
0
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();
}
Exemplo n.º 2
0
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());
}