JSString*
js::AsmJSFunctionToString(JSContext* cx, HandleFunction fun)
{
AsmJSModule& module = FunctionToEnclosingModule(fun);
const AsmJSModule::ExportedFunction& f = FunctionToExportedFunction(fun, module);
uint32_t begin = module.srcStart() + f.startOffsetInModule();
uint32_t end = module.srcStart() + f.endOffsetInModule();
ScriptSource* source = module.scriptSource();
StringBuffer out(cx);
if (!out.append("function "))
return nullptr;
bool haveSource = source->hasSourceData();
if (!haveSource && !JSScript::loadSource(cx, source, &haveSource))
return nullptr;
if (!haveSource) {
// asm.js functions can't be anonymous
MOZ_ASSERT(fun->atom());
if (!out.append(fun->atom()))
return nullptr;
if (!out.append("() {\n [sourceless code]\n}"))
return nullptr;
} else {
// asm.js functions cannot have been created with a Function constructor
// as they belong within a module.
MOZ_ASSERT(!(begin == 0 && end == source->length() && source->argumentsNotIncluded()));
if (module.strict()) {
// AppendUseStrictSource expects its input to start right after the
// function name, so split the source chars from the src into two parts:
// the function name and the rest (arguments + body).
// asm.js functions can't be anonymous
MOZ_ASSERT(fun->atom());
if (!out.append(fun->atom()))
return nullptr;
size_t nameEnd = begin + fun->atom()->length();
Rooted<JSFlatString*> src(cx, source->substring(cx, nameEnd, end));
if (!AppendUseStrictSource(cx, fun, src, out))
return nullptr;
} else {
Rooted<JSFlatString*> src(cx, source->substring(cx, begin, end));
if (!src)
return nullptr;
if (!out.append(src))
return nullptr;
}
}
return out.finishString();
}
JSString *
js::AsmJSModuleToString(JSContext *cx, HandleFunction fun, bool addParenToLambda)
{
AsmJSModule &module = ModuleFunctionToModuleObject(fun).module();
uint32_t begin = module.srcStart();
uint32_t end = module.srcEndAfterCurly();
ScriptSource *source = module.scriptSource();
StringBuffer out(cx);
// Whether the function has been created with a Function ctor
bool funCtor = begin == 0 && end == source->length() && source->argumentsNotIncluded();
if (addParenToLambda && fun->isLambda() && !out.append("("))
return nullptr;
if (!out.append("function "))
return nullptr;
if (fun->atom() && !out.append(fun->atom()))
return nullptr;
if (funCtor) {
// Functions created with the function constructor don't have arguments in their source.
if (!out.append("("))
return nullptr;
if (PropertyName *argName = module.globalArgumentName()) {
if (!out.append(argName))
return nullptr;
}
if (PropertyName *argName = module.importArgumentName()) {
if (!out.append(", ") || !out.append(argName))
return nullptr;
}
if (PropertyName *argName = module.bufferArgumentName()) {
if (!out.append(", ") || !out.append(argName))
return nullptr;
}
if (!out.append(") {\n"))
return nullptr;
}
Rooted<JSFlatString*> src(cx, source->substring(cx, begin, end));
if (!src)
return nullptr;
if (module.strict()) {
if (!AppendUseStrictSource(cx, fun, src, out))
return nullptr;
} else {
if (!out.append(src))
return nullptr;
}
if (funCtor && !out.append("\n}"))
return nullptr;
if (addParenToLambda && fun->isLambda() && !out.append(")"))
return nullptr;
return out.finishString();
}
JSObject *
GlobalObject::initFunctionAndObjectClasses(JSContext *cx)
{
Rooted<GlobalObject*> self(cx, this);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
JS_ASSERT(isNative());
cx->setDefaultCompartmentObjectIfUnset(self);
RootedObject objectProto(cx);
/*
* Create |Object.prototype| first, mirroring CreateBlankProto but for the
* prototype of the created object.
*/
objectProto = NewObjectWithGivenProto(cx, &ObjectClass, NULL, self, SingletonObject);
if (!objectProto)
return NULL;
/*
* The default 'new' type of Object.prototype is required by type inference
* to have unknown properties, to simplify handling of e.g. heterogenous
* objects in JSON and script literals.
*/
if (!setNewTypeUnknown(cx, &ObjectClass, objectProto))
return NULL;
/* Create |Function.prototype| next so we can create other functions. */
RootedFunction functionProto(cx);
{
RawObject functionProto_ = NewObjectWithGivenProto(cx, &FunctionClass, objectProto, self,
SingletonObject);
if (!functionProto_)
return NULL;
functionProto = functionProto_->toFunction();
/*
* Bizarrely, |Function.prototype| must be an interpreted function, so
* give it the guts to be one.
*/
{
RawObject proto = NewFunction(cx, functionProto, NULL, 0, JSFunction::INTERPRETED,
self, NullPtr());
if (!proto)
return NULL;
JS_ASSERT(proto == functionProto);
functionProto->setIsFunctionPrototype();
}
const char *rawSource = "() {\n}";
size_t sourceLen = strlen(rawSource);
jschar *source = InflateString(cx, rawSource, &sourceLen);
if (!source)
return NULL;
ScriptSource *ss = cx->new_<ScriptSource>();
if (!ss) {
js_free(source);
return NULL;
}
ScriptSourceHolder ssh(ss);
ss->setSource(source, sourceLen);
CompileOptions options(cx);
options.setNoScriptRval(true)
.setVersion(JSVERSION_DEFAULT);
RootedScript script(cx, JSScript::Create(cx,
/* enclosingScope = */ NullPtr(),
/* savedCallerFun = */ false,
options,
/* staticLevel = */ 0,
ss,
0,
ss->length()));
if (!script || !JSScript::fullyInitTrivial(cx, script))
return NULL;
functionProto->initScript(script);
types::TypeObject* protoType = functionProto->getType(cx);
if (!protoType)
return NULL;
protoType->interpretedFunction = functionProto;
script->setFunction(functionProto);
/*
* The default 'new' type of Function.prototype is required by type
* inference to have unknown properties, to simplify handling of e.g.
* CloneFunctionObject.
*/
if (!setNewTypeUnknown(cx, &FunctionClass, functionProto))
return NULL;
}
/* Create the Object function now that we have a [[Prototype]] for it. */
RootedFunction objectCtor(cx);
{
RootedObject ctor(cx, NewObjectWithGivenProto(cx, &FunctionClass, functionProto, self,
SingletonObject));
if (!ctor)
return NULL;
RootedAtom objectAtom(cx, cx->names().Object);
objectCtor = NewFunction(cx, ctor, obj_construct, 1, JSFunction::NATIVE_CTOR, self,
objectAtom);
if (!objectCtor)
return NULL;
}
/*
* Install |Object| and |Object.prototype| for the benefit of subsequent
* code that looks for them.
*/
self->setObjectClassDetails(objectCtor, objectProto);
/* Create |Function| so it and |Function.prototype| can be installed. */
RootedFunction functionCtor(cx);
{
// Note that ctor is rooted purely for the JS_ASSERT at the end
RootedObject ctor(cx, NewObjectWithGivenProto(cx, &FunctionClass, functionProto, self,
SingletonObject));
if (!ctor)
return NULL;
RootedAtom functionAtom(cx, cx->names().Function);
functionCtor = NewFunction(cx, ctor, Function, 1, JSFunction::NATIVE_CTOR, self,
functionAtom);
if (!functionCtor)
return NULL;
JS_ASSERT(ctor == functionCtor);
}
/*
* Install |Function| and |Function.prototype| so that we can freely create
* functions and objects without special effort.
*/
self->setFunctionClassDetails(functionCtor, functionProto);
/*
* The hard part's done: now go back and add all the properties these
* primordial values have.
*/
if (!LinkConstructorAndPrototype(cx, objectCtor, objectProto) ||
!DefinePropertiesAndBrand(cx, objectProto, NULL, object_methods))
{
return NULL;
}
/*
* Add an Object.prototype.__proto__ accessor property to implement that
* extension (if it's actually enabled). Cache the getter for this
* function so that cross-compartment [[Prototype]]-getting is implemented
* in one place.
*/
RootedFunction getter(cx, NewFunction(cx, NullPtr(), ProtoGetter, 0, JSFunction::NATIVE_FUN,
self, NullPtr()));
if (!getter)
return NULL;
#if JS_HAS_OBJ_PROTO_PROP
RootedFunction setter(cx, NewFunction(cx, NullPtr(), ProtoSetter, 0, JSFunction::NATIVE_FUN,
self, NullPtr()));
if (!setter)
return NULL;
RootedValue undefinedValue(cx, UndefinedValue());
if (!JSObject::defineProperty(cx, objectProto,
cx->names().proto, undefinedValue,
JS_DATA_TO_FUNC_PTR(PropertyOp, getter.get()),
JS_DATA_TO_FUNC_PTR(StrictPropertyOp, setter.get()),
JSPROP_GETTER | JSPROP_SETTER | JSPROP_SHARED))
{
return NULL;
}
#endif /* JS_HAS_OBJ_PROTO_PROP */
self->setProtoGetter(getter);
if (!DefinePropertiesAndBrand(cx, objectCtor, NULL, object_static_methods) ||
!LinkConstructorAndPrototype(cx, functionCtor, functionProto) ||
!DefinePropertiesAndBrand(cx, functionProto, NULL, function_methods) ||
!DefinePropertiesAndBrand(cx, functionCtor, NULL, NULL))
{
return NULL;
}
/* Add the global Function and Object properties now. */
if (!self->addDataProperty(cx, cx->names().Object, JSProto_Object + JSProto_LIMIT * 2, 0))
return NULL;
if (!self->addDataProperty(cx, cx->names().Function, JSProto_Function + JSProto_LIMIT * 2, 0))
return NULL;
/* Heavy lifting done, but lingering tasks remain. */
/* ES5 15.1.2.1. */
RootedId evalId(cx, NameToId(cx->names().eval));
RawObject evalobj = DefineFunction(cx, self, evalId, IndirectEval, 1, JSFUN_STUB_GSOPS);
if (!evalobj)
return NULL;
self->setOriginalEval(evalobj);
/* ES5 13.2.3: Construct the unique [[ThrowTypeError]] function object. */
RootedFunction throwTypeError(cx, NewFunction(cx, NullPtr(), ThrowTypeError, 0,
JSFunction::NATIVE_FUN, self, NullPtr()));
if (!throwTypeError)
return NULL;
if (!JSObject::preventExtensions(cx, throwTypeError))
return NULL;
self->setThrowTypeError(throwTypeError);
RootedObject intrinsicsHolder(cx);
if (cx->runtime->isSelfHostingGlobal(self)) {
intrinsicsHolder = self;
} else {
intrinsicsHolder = NewObjectWithClassProto(cx, &ObjectClass, NULL, self, TenuredObject);
if (!intrinsicsHolder)
return NULL;
}
self->setIntrinsicsHolder(intrinsicsHolder);
/* Define a property 'global' with the current global as its value. */
RootedValue global(cx, ObjectValue(*self));
if (!JSObject::defineProperty(cx, intrinsicsHolder, cx->names().global,
global, JS_PropertyStub, JS_StrictPropertyStub,
JSPROP_PERMANENT | JSPROP_READONLY))
{
return NULL;
}
/*
* The global object should have |Object.prototype| as its [[Prototype]].
* Eventually we'd like to have standard classes be there from the start,
* and thus we would know we were always setting what had previously been a
* null [[Prototype]], but right now some code assumes it can set the
* [[Prototype]] before standard classes have been initialized. For now,
* only set the [[Prototype]] if it hasn't already been set.
*/
Rooted<TaggedProto> tagged(cx, TaggedProto(objectProto));
if (self->shouldSplicePrototype(cx) && !self->splicePrototype(cx, self->getClass(), tagged))
return NULL;
/*
* Notify any debuggers about the creation of the script for
* |Function.prototype| -- after all initialization, for simplicity.
*/
RootedScript functionProtoScript(cx, functionProto->nonLazyScript());
CallNewScriptHook(cx, functionProtoScript, functionProto);
return functionProto;
}
JSObject *
GlobalObject::initFunctionAndObjectClasses(JSContext *cx)
{
Rooted<GlobalObject*> self(cx, this);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
JS_ASSERT(isNative());
/*
* Calling a function from a cleared global triggers this (yeah, I know).
* Uncomment this once bug 470510 is fixed (if that bug doesn't remove
* isCleared entirely).
*/
// JS_ASSERT(!isCleared());
/* If cx has no global object, make this the global object. */
if (!cx->globalObject)
JS_SetGlobalObject(cx, self);
RootedObject objectProto(cx);
/*
* Create |Object.prototype| first, mirroring CreateBlankProto but for the
* prototype of the created object.
*/
objectProto = NewObjectWithGivenProto(cx, &ObjectClass, NULL, self);
if (!objectProto || !objectProto->setSingletonType(cx))
return NULL;
/*
* The default 'new' type of Object.prototype is required by type inference
* to have unknown properties, to simplify handling of e.g. heterogenous
* objects in JSON and script literals.
*/
if (!objectProto->setNewTypeUnknown(cx))
return NULL;
/* Create |Function.prototype| next so we can create other functions. */
RootedFunction functionProto(cx);
{
JSObject *functionProto_ = NewObjectWithGivenProto(cx, &FunctionClass, objectProto, self);
if (!functionProto_)
return NULL;
functionProto = functionProto_->toFunction();
/*
* Bizarrely, |Function.prototype| must be an interpreted function, so
* give it the guts to be one.
*/
JSObject *proto = js_NewFunction(cx, functionProto,
NULL, 0, JSFUN_INTERPRETED, self, NULL);
if (!proto)
return NULL;
JS_ASSERT(proto == functionProto);
functionProto->flags |= JSFUN_PROTOTYPE;
const char *rawSource = "() {\n}";
size_t sourceLen = strlen(rawSource);
jschar *source = InflateString(cx, rawSource, &sourceLen);
if (!source)
return NULL;
ScriptSource *ss = cx->new_<ScriptSource>();
if (!ss) {
cx->free_(source);
return NULL;
}
ScriptSourceHolder ssh(cx->runtime, ss);
ss->setSource(source, sourceLen);
CompileOptions options(cx);
options.setNoScriptRval(true)
.setVersion(JSVERSION_DEFAULT);
Rooted<JSScript*> script(cx, JSScript::Create(cx,
/* enclosingScope = */ NullPtr(),
/* savedCallerFun = */ false,
options,
/* staticLevel = */ 0,
ss,
0,
ss->length()));
if (!script || !JSScript::fullyInitTrivial(cx, script))
return NULL;
functionProto->initScript(script);
functionProto->getType(cx)->interpretedFunction = functionProto;
script->setFunction(functionProto);
if (!functionProto->setSingletonType(cx))
return NULL;
/*
* The default 'new' type of Function.prototype is required by type
* inference to have unknown properties, to simplify handling of e.g.
* CloneFunctionObject.
*/
if (!functionProto->setNewTypeUnknown(cx))
return NULL;
}
/* Create the Object function now that we have a [[Prototype]] for it. */
RootedFunction objectCtor(cx);
{
JSObject *ctor = NewObjectWithGivenProto(cx, &FunctionClass, functionProto, self);
if (!ctor)
return NULL;
objectCtor = js_NewFunction(cx, ctor, js_Object, 1, JSFUN_CONSTRUCTOR, self,
CLASS_NAME(cx, Object));
if (!objectCtor)
return NULL;
}
/*
* Install |Object| and |Object.prototype| for the benefit of subsequent
* code that looks for them.
*/
self->setObjectClassDetails(objectCtor, objectProto);
/* Create |Function| so it and |Function.prototype| can be installed. */
RootedFunction functionCtor(cx);
{
// Note that ctor is rooted purely for the JS_ASSERT at the end
RootedObject ctor(cx, NewObjectWithGivenProto(cx, &FunctionClass, functionProto, self));
if (!ctor)
return NULL;
functionCtor = js_NewFunction(cx, ctor, Function, 1, JSFUN_CONSTRUCTOR, self,
CLASS_NAME(cx, Function));
if (!functionCtor)
return NULL;
JS_ASSERT(ctor == functionCtor);
}
/*
* Install |Function| and |Function.prototype| so that we can freely create
* functions and objects without special effort.
*/
self->setFunctionClassDetails(functionCtor, functionProto);
/*
* The hard part's done: now go back and add all the properties these
* primordial values have.
*/
if (!LinkConstructorAndPrototype(cx, objectCtor, objectProto) ||
!DefinePropertiesAndBrand(cx, objectProto, NULL, object_methods))
{
return NULL;
}
/*
* Add an Object.prototype.__proto__ accessor property to implement that
* extension (if it's actually enabled). Cache the getter for this
* function so that cross-compartment [[Prototype]]-getting is implemented
* in one place.
*/
Rooted<JSFunction*> getter(cx, js_NewFunction(cx, NULL, ProtoGetter, 0, 0, self, NULL));
if (!getter)
return NULL;
#if JS_HAS_OBJ_PROTO_PROP
Rooted<JSFunction*> setter(cx, js_NewFunction(cx, NULL, ProtoSetter, 0, 0, self, NULL));
if (!setter)
return NULL;
RootedValue undefinedValue(cx, UndefinedValue());
if (!objectProto->defineProperty(cx, cx->runtime->atomState.protoAtom, undefinedValue,
JS_DATA_TO_FUNC_PTR(PropertyOp, getter.get()),
JS_DATA_TO_FUNC_PTR(StrictPropertyOp, setter.get()),
JSPROP_GETTER | JSPROP_SETTER | JSPROP_SHARED))
{
return NULL;
}
#endif /* JS_HAS_OBJ_PROTO_PROP */
self->setProtoGetter(getter);
if (!DefinePropertiesAndBrand(cx, objectCtor, NULL, object_static_methods) ||
!LinkConstructorAndPrototype(cx, functionCtor, functionProto) ||
!DefinePropertiesAndBrand(cx, functionProto, NULL, function_methods) ||
!DefinePropertiesAndBrand(cx, functionCtor, NULL, NULL))
{
return NULL;
}
/* Add the global Function and Object properties now. */
jsid objectId = NameToId(CLASS_NAME(cx, Object));
if (!self->addDataProperty(cx, objectId, JSProto_Object + JSProto_LIMIT * 2, 0))
return NULL;
jsid functionId = NameToId(CLASS_NAME(cx, Function));
if (!self->addDataProperty(cx, functionId, JSProto_Function + JSProto_LIMIT * 2, 0))
return NULL;
/* Heavy lifting done, but lingering tasks remain. */
/* ES5 15.1.2.1. */
RootedId id(cx, NameToId(cx->runtime->atomState.evalAtom));
JSObject *evalobj = js_DefineFunction(cx, self, id, IndirectEval, 1, JSFUN_STUB_GSOPS);
if (!evalobj)
return NULL;
self->setOriginalEval(evalobj);
/* ES5 13.2.3: Construct the unique [[ThrowTypeError]] function object. */
RootedFunction throwTypeError(cx, js_NewFunction(cx, NULL, ThrowTypeError, 0, 0, self, NULL));
if (!throwTypeError)
return NULL;
if (!throwTypeError->preventExtensions(cx))
return NULL;
self->setThrowTypeError(throwTypeError);
RootedObject intrinsicsHolder(cx, JS_NewObject(cx, NULL, NULL, self));
if (!intrinsicsHolder)
return NULL;
self->setIntrinsicsHolder(intrinsicsHolder);
if (!JS_DefineFunctions(cx, intrinsicsHolder, intrinsic_functions))
return NULL;
/*
* The global object should have |Object.prototype| as its [[Prototype]].
* Eventually we'd like to have standard classes be there from the start,
* and thus we would know we were always setting what had previously been a
* null [[Prototype]], but right now some code assumes it can set the
* [[Prototype]] before standard classes have been initialized. For now,
* only set the [[Prototype]] if it hasn't already been set.
*/
if (self->shouldSplicePrototype(cx) && !self->splicePrototype(cx, objectProto))
return NULL;
/*
* Notify any debuggers about the creation of the script for
* |Function.prototype| -- after all initialization, for simplicity.
*/
js_CallNewScriptHook(cx, functionProto->script(), functionProto);
return functionProto;
}