JSObject *
js_InitExceptionClasses(JSContext *cx, JSObject *obj)
{
int i;
JSObject *protos[JSEXN_LIMIT];
/* Initialize the prototypes first. */
for (i = 0; exceptions[i].name != 0; i++) {
JSAtom *atom;
JSFunction *fun;
JSString *nameString;
int protoIndex = exceptions[i].protoIndex;
/* Make the prototype for the current constructor name. */
protos[i] = js_NewObject(cx, &ExceptionClass,
(protoIndex != JSEXN_NONE)
? protos[protoIndex]
: NULL,
obj);
if (!protos[i])
return NULL;
/* So exn_finalize knows whether to destroy private data. */
OBJ_SET_SLOT(cx, protos[i], JSSLOT_PRIVATE, JSVAL_VOID);
atom = js_Atomize(cx, exceptions[i].name, strlen(exceptions[i].name), 0);
if (!atom)
return NULL;
/* Make a constructor function for the current name. */
fun = js_DefineFunction(cx, obj, atom, exceptions[i].native, 3, 0);
if (!fun)
return NULL;
/* Make this constructor make objects of class Exception. */
fun->clasp = &ExceptionClass;
/* Make the prototype and constructor links. */
if (!js_SetClassPrototype(cx, fun->object, protos[i],
JSPROP_READONLY | JSPROP_PERMANENT)) {
return NULL;
}
/* proto bootstrap bit from JS_InitClass omitted. */
nameString = JS_NewStringCopyZ(cx, exceptions[i].name);
if (!nameString)
return NULL;
/* Add the name property to the prototype. */
if (!JS_DefineProperty(cx, protos[i], js_name_str,
STRING_TO_JSVAL(nameString),
NULL, NULL,
JSPROP_ENUMERATE)) {
return NULL;
}
}
/*
* Add an empty message property. (To Exception.prototype only,
* because this property will be the same for all the exception
* protos.)
*/
if (!JS_DefineProperty(cx, protos[0], js_message_str,
STRING_TO_JSVAL(cx->runtime->emptyString),
NULL, NULL, JSPROP_ENUMERATE)) {
return NULL;
}
if (!JS_DefineProperty(cx, protos[0], js_filename_str,
STRING_TO_JSVAL(cx->runtime->emptyString),
NULL, NULL, JSPROP_ENUMERATE)) {
return NULL;
}
if (!JS_DefineProperty(cx, protos[0], js_lineno_str,
INT_TO_JSVAL(0),
NULL, NULL, JSPROP_ENUMERATE)) {
return NULL;
}
/*
* Add methods only to Exception.prototype, because ostensibly all
* exception types delegate to that.
*/
if (!JS_DefineFunctions(cx, protos[0], exception_methods))
return NULL;
return protos[0];
}
JSObject *
GlobalObject::initFunctionAndObjectClasses(JSContext *cx)
{
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, this);
/*
* Create |Object.prototype| first, mirroring CreateBlankProto but for the
* prototype of the created object.
*/
JSObject *objectProto = NewObjectWithGivenProto(cx, &ObjectClass, NULL, this);
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. */
JSFunction *functionProto;
{
JSObject *proto = NewObjectWithGivenProto(cx, &FunctionClass, objectProto, this);
if (!proto)
return NULL;
/*
* Bizarrely, |Function.prototype| must be an interpreted function, so
* give it the guts to be one.
*/
functionProto = js_NewFunction(cx, proto, NULL, 0, JSFUN_INTERPRETED, this, NULL);
if (!functionProto)
return NULL;
JS_ASSERT(proto == functionProto);
functionProto->flags |= JSFUN_PROTOTYPE;
JSScript *script =
JSScript::NewScript(cx, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, JSVERSION_DEFAULT);
if (!script)
return NULL;
script->noScriptRval = true;
script->code[0] = JSOP_STOP;
script->code[1] = SRC_NULL;
functionProto->initScript(script);
functionProto->getType(cx)->interpretedFunction = functionProto;
script->setFunction(functionProto);
if (!proto->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 (!proto->setNewTypeUnknown(cx))
return NULL;
}
/* Create the Object function now that we have a [[Prototype]] for it. */
jsid objectId = ATOM_TO_JSID(CLASS_ATOM(cx, Object));
JSFunction *objectCtor;
{
JSObject *ctor = NewObjectWithGivenProto(cx, &FunctionClass, functionProto, this);
if (!ctor)
return NULL;
objectCtor = js_NewFunction(cx, ctor, js_Object, 1, JSFUN_CONSTRUCTOR, this,
JSID_TO_ATOM(objectId));
if (!objectCtor)
return NULL;
JS_ASSERT(ctor == objectCtor);
objectCtor->setConstructorClass(&ObjectClass);
}
/*
* Install |Object| and |Object.prototype| for the benefit of subsequent
* code that looks for them.
*/
setObjectClassDetails(objectCtor, objectProto);
/* Create |Function| so it and |Function.prototype| can be installed. */
jsid functionId = ATOM_TO_JSID(CLASS_ATOM(cx, Function));
JSFunction *functionCtor;
{
JSObject *ctor =
NewObjectWithGivenProto(cx, &FunctionClass, functionProto, this);
if (!ctor)
return NULL;
functionCtor = js_NewFunction(cx, ctor, Function, 1, JSFUN_CONSTRUCTOR, this,
JSID_TO_ATOM(functionId));
if (!functionCtor)
return NULL;
JS_ASSERT(ctor == functionCtor);
functionCtor->setConstructorClass(&FunctionClass);
}
/*
* Install |Function| and |Function.prototype| so that we can freely create
* functions and objects without special effort.
*/
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, object_props, object_methods) ||
!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 (!addDataProperty(cx, objectId, JSProto_Object + JSProto_LIMIT * 2, 0))
return NULL;
if (!addDataProperty(cx, functionId, JSProto_Function + JSProto_LIMIT * 2, 0))
return NULL;
/* Heavy lifting done, but lingering tasks remain. */
/* ES5 15.1.2.1. */
jsid id = ATOM_TO_JSID(cx->runtime->atomState.evalAtom);
JSObject *evalobj = js_DefineFunction(cx, this, id, eval, 1, JSFUN_STUB_GSOPS);
if (!evalobj)
return NULL;
setOriginalEval(evalobj);
/* ES5 13.2.3: Construct the unique [[ThrowTypeError]] function object. */
JSFunction *throwTypeError = js_NewFunction(cx, NULL, ThrowTypeError, 0, 0, this, NULL);
if (!throwTypeError)
return NULL;
AutoIdVector ids(cx);
if (!throwTypeError->preventExtensions(cx, &ids))
return NULL;
setThrowTypeError(throwTypeError);
/*
* 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 (shouldSplicePrototype(cx) && !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;
}
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;
}
JSObject *
js_InitExceptionClasses(JSContext *cx, JSObject *obj)
{
JSObject *obj_proto, *protos[JSEXN_LIMIT];
int i;
/*
* If lazy class initialization occurs for any Error subclass, then all
* classes are initialized, starting with Error. To avoid reentry and
* redundant initialization, we must not pass a null proto parameter to
* js_NewObject below, when called for the Error superclass. We need to
* ensure that Object.prototype is the proto of Error.prototype.
*
* See the equivalent code to ensure that parent_proto is non-null when
* JS_InitClass calls js_NewObject, in jsapi.c.
*/
if (!js_GetClassPrototype(cx, obj, INT_TO_JSID(JSProto_Object),
&obj_proto)) {
return NULL;
}
if (!js_EnterLocalRootScope(cx))
return NULL;
/* Initialize the prototypes first. */
for (i = 0; exceptions[i].name != 0; i++) {
JSAtom *atom;
JSFunction *fun;
JSString *nameString;
int protoIndex = exceptions[i].protoIndex;
/* Make the prototype for the current constructor name. */
protos[i] = js_NewObject(cx, &js_ErrorClass,
(protoIndex != JSEXN_NONE)
? protos[protoIndex]
: obj_proto,
obj, 0);
if (!protos[i])
break;
/* So exn_finalize knows whether to destroy private data. */
STOBJ_SET_SLOT(protos[i], JSSLOT_PRIVATE, JSVAL_VOID);
/* Make a constructor function for the current name. */
atom = cx->runtime->atomState.classAtoms[exceptions[i].key];
fun = js_DefineFunction(cx, obj, atom, exceptions[i].native, 3, 0);
if (!fun)
break;
/* Make this constructor make objects of class Exception. */
fun->u.n.clasp = &js_ErrorClass;
/* Make the prototype and constructor links. */
if (!js_SetClassPrototype(cx, FUN_OBJECT(fun), protos[i],
JSPROP_READONLY | JSPROP_PERMANENT)) {
break;
}
/* proto bootstrap bit from JS_InitClass omitted. */
nameString = JS_NewStringCopyZ(cx, exceptions[i].name);
if (!nameString)
break;
/* Add the name property to the prototype. */
if (!JS_DefineProperty(cx, protos[i], js_name_str,
STRING_TO_JSVAL(nameString),
NULL, NULL,
JSPROP_ENUMERATE)) {
break;
}
/* Finally, stash the constructor for later uses. */
if (!js_SetClassObject(cx, obj, exceptions[i].key, FUN_OBJECT(fun)))
break;
}
js_LeaveLocalRootScope(cx);
if (exceptions[i].name)
return NULL;
/*
* Add an empty message property. (To Exception.prototype only,
* because this property will be the same for all the exception
* protos.)
*/
if (!JS_DefineProperty(cx, protos[0], js_message_str,
STRING_TO_JSVAL(cx->runtime->emptyString),
NULL, NULL, JSPROP_ENUMERATE)) {
return NULL;
}
if (!JS_DefineProperty(cx, protos[0], js_fileName_str,
STRING_TO_JSVAL(cx->runtime->emptyString),
NULL, NULL, JSPROP_ENUMERATE)) {
return NULL;
}
if (!JS_DefineProperty(cx, protos[0], js_lineNumber_str,
INT_TO_JSVAL(0),
NULL, NULL, JSPROP_ENUMERATE)) {
return NULL;
}
/*
* Add methods only to Exception.prototype, because ostensibly all
* exception types delegate to that.
*/
if (!JS_DefineFunctions(cx, protos[0], exception_methods))
return NULL;
return protos[0];
}
JSObject *
js_InitExceptionClasses(JSContext *cx, JSObject *obj)
{
jsval roots[3];
JSObject *obj_proto, *error_proto;
jsval empty;
/*
* If lazy class initialization occurs for any Error subclass, then all
* classes are initialized, starting with Error. To avoid reentry and
* redundant initialization, we must not pass a null proto parameter to
* js_NewObject below, when called for the Error superclass. We need to
* ensure that Object.prototype is the proto of Error.prototype.
*
* See the equivalent code to ensure that parent_proto is non-null when
* JS_InitClass calls js_NewObject, in jsapi.c.
*/
if (!js_GetClassPrototype(cx, obj, INT_TO_JSID(JSProto_Object),
&obj_proto)) {
return NULL;
}
memset(roots, 0, sizeof(roots));
JSAutoTempValueRooter tvr(cx, JS_ARRAY_LENGTH(roots), roots);
#ifdef __GNUC__
error_proto = NULL; /* quell GCC overwarning */
#endif
/* Initialize the prototypes first. */
for (intN i = JSEXN_ERR; i != JSEXN_LIMIT; i++) {
JSObject *proto;
JSProtoKey protoKey;
JSAtom *atom;
JSFunction *fun;
/* Make the prototype for the current constructor name. */
proto = js_NewObject(cx, &js_ErrorClass,
(i != JSEXN_ERR) ? error_proto : obj_proto,
obj);
if (!proto)
return NULL;
if (i == JSEXN_ERR) {
error_proto = proto;
roots[0] = OBJECT_TO_JSVAL(proto);
} else {
// We cannot share the root for error_proto and other prototypes
// as error_proto must be rooted until the function returns.
roots[1] = OBJECT_TO_JSVAL(proto);
}
/* So exn_finalize knows whether to destroy private data. */
proto->setPrivate(NULL);
/* Make a constructor function for the current name. */
protoKey = GetExceptionProtoKey(i);
atom = cx->runtime->atomState.classAtoms[protoKey];
fun = js_DefineFunction(cx, obj, atom, Exception, 3, 0);
if (!fun)
return NULL;
roots[2] = OBJECT_TO_JSVAL(FUN_OBJECT(fun));
/* Make this constructor make objects of class Exception. */
FUN_CLASP(fun) = &js_ErrorClass;
/* Make the prototype and constructor links. */
if (!js_SetClassPrototype(cx, FUN_OBJECT(fun), proto,
JSPROP_READONLY | JSPROP_PERMANENT)) {
return NULL;
}
/* Add the name property to the prototype. */
if (!JS_DefineProperty(cx, proto, js_name_str, ATOM_KEY(atom),
NULL, NULL, JSPROP_ENUMERATE)) {
return NULL;
}
/* Finally, stash the constructor for later uses. */
if (!js_SetClassObject(cx, obj, protoKey, FUN_OBJECT(fun)))
return NULL;
}
/*
* Set default values and add methods. We do it only for Error.prototype
* as the rest of exceptions delegate to it.
*/
empty = STRING_TO_JSVAL(cx->runtime->emptyString);
if (!JS_DefineProperty(cx, error_proto, js_message_str, empty,
NULL, NULL, JSPROP_ENUMERATE) ||
!JS_DefineProperty(cx, error_proto, js_fileName_str, empty,
NULL, NULL, JSPROP_ENUMERATE) ||
!JS_DefineProperty(cx, error_proto, js_lineNumber_str, JSVAL_ZERO,
NULL, NULL, JSPROP_ENUMERATE) ||
!JS_DefineFunctions(cx, error_proto, exception_methods)) {
return NULL;
}
return error_proto;
}
