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cobalt / cobalt / ace1352a0c2809ca6456a251535efd21c9612941 / . / src / third_party / mozjs / js / src / jsproxy.cpp
blob: 2dbad14c53335639ae4b8a2df90759d2a0cfbef8 [file] [log] [blame]
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "jsproxy.h"
#include <string.h>
#include "jsapi.h"
#include "jscntxt.h"
#include "jsfun.h"
#include "jsgc.h"
#include "jsprvtd.h"
#include "gc/Marking.h"
#include "jsatominlines.h"
#include "jsinferinlines.h"
#include "jsobjinlines.h"
#include "vm/RegExpObject-inl.h"
using namespace js;
using namespace js::gc;
using mozilla::ArrayLength;
static inline HeapSlot &
GetCall(JSObject *proxy)
{
JS_ASSERT(IsFunctionProxy(proxy));
return proxy->getSlotRef(JSSLOT_PROXY_CALL);
}
static inline Value
GetConstruct(JSObject *proxy)
{
if (proxy->slotSpan() <= JSSLOT_PROXY_CONSTRUCT)
return UndefinedValue();
return proxy->getSlot(JSSLOT_PROXY_CONSTRUCT);
}
static inline HeapSlot &
GetFunctionProxyConstruct(JSObject *proxy)
{
JS_ASSERT(IsFunctionProxy(proxy));
JS_ASSERT(proxy->slotSpan() > JSSLOT_PROXY_CONSTRUCT);
return proxy->getSlotRef(JSSLOT_PROXY_CONSTRUCT);
}
void
js::AutoEnterPolicy::reportError(JSContext *cx, jsid id)
{
if (JSID_IS_VOID(id)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL,
JSMSG_OBJECT_ACCESS_DENIED);
} else {
JSString *str = IdToString(cx, id);
const jschar *prop = str ? str->getCharsZ(cx) : NULL;
JS_ReportErrorNumberUC(cx, js_GetErrorMessage, NULL,
JSMSG_PROPERTY_ACCESS_DENIED, prop);
}
}
#ifdef DEBUG
void
js::AutoEnterPolicy::recordEnter(JSContext *cx, HandleObject proxy, HandleId id)
{
if (allowed()) {
context = cx;
enteredProxy.construct(proxy);
enteredId.construct(id);
prev = cx->runtime()->enteredPolicy;
cx->runtime()->enteredPolicy = this;
}
}
void
js::AutoEnterPolicy::recordLeave()
{
if (!enteredProxy.empty()) {
JS_ASSERT(context->runtime()->enteredPolicy == this);
context->runtime()->enteredPolicy = prev;
}
}
JS_FRIEND_API(void)
js::assertEnteredPolicy(JSContext *cx, JSObject *proxy, jsid id)
{
MOZ_ASSERT(proxy->isProxy());
MOZ_ASSERT(cx->runtime()->enteredPolicy);
MOZ_ASSERT(cx->runtime()->enteredPolicy->enteredProxy.ref().get() == proxy);
MOZ_ASSERT(cx->runtime()->enteredPolicy->enteredId.ref().get() == id);
}
#endif
BaseProxyHandler::BaseProxyHandler(void *family)
: mFamily(family),
mHasPrototype(false),
mHasPolicy(false)
{
}
BaseProxyHandler::~BaseProxyHandler()
{
}
bool
BaseProxyHandler::enter(JSContext *cx, HandleObject wrapper, HandleId id, Action act,
bool *bp)
{
*bp = true;
return true;
}
bool
BaseProxyHandler::has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
assertEnteredPolicy(cx, proxy, id);
AutoPropertyDescriptorRooter desc(cx);
if (!getPropertyDescriptor(cx, proxy, id, &desc, 0))
return false;
*bp = !!desc.obj;
return true;
}
bool
BaseProxyHandler::hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
assertEnteredPolicy(cx, proxy, id);
AutoPropertyDescriptorRooter desc(cx);
if (!getOwnPropertyDescriptor(cx, proxy, id, &desc, 0))
return false;
*bp = !!desc.obj;
return true;
}
bool
BaseProxyHandler::get(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, MutableHandleValue vp)
{
assertEnteredPolicy(cx, proxy, id);
AutoPropertyDescriptorRooter desc(cx);
if (!getPropertyDescriptor(cx, proxy, id, &desc, 0))
return false;
if (!desc.obj) {
vp.setUndefined();
return true;
}
if (!desc.getter ||
(!(desc.attrs & JSPROP_GETTER) && desc.getter == JS_PropertyStub)) {
vp.set(desc.value);
return true;
}
if (desc.attrs & JSPROP_GETTER)
return InvokeGetterOrSetter(cx, receiver, CastAsObjectJsval(desc.getter), 0, NULL,
vp.address());
if (!(desc.attrs & JSPROP_SHARED))
vp.set(desc.value);
else
vp.setUndefined();
if (desc.attrs & JSPROP_SHORTID) {
RootedId id(cx, INT_TO_JSID(desc.shortid));
return CallJSPropertyOp(cx, desc.getter, receiver, id, vp);
}
return CallJSPropertyOp(cx, desc.getter, receiver, id, vp);
}
bool
BaseProxyHandler::getElementIfPresent(JSContext *cx, HandleObject proxy, HandleObject receiver,
uint32_t index, MutableHandleValue vp, bool *present)
{
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
assertEnteredPolicy(cx, proxy, id);
if (!has(cx, proxy, id, present))
return false;
if (!*present) {
Debug_SetValueRangeToCrashOnTouch(vp.address(), 1);
return true;
}
return get(cx, proxy, receiver, id, vp);
}
bool
BaseProxyHandler::set(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, bool strict, MutableHandleValue vp)
{
assertEnteredPolicy(cx, proxy, id);
AutoPropertyDescriptorRooter desc(cx);
if (!getOwnPropertyDescriptor(cx, proxy, id, &desc, JSRESOLVE_ASSIGNING))
return false;
/* The control-flow here differs from ::get() because of the fall-through case below. */
if (desc.obj) {
// Check for read-only properties.
if (desc.attrs & JSPROP_READONLY)
return strict ? Throw(cx, id, JSMSG_CANT_REDEFINE_PROP) : true;
if (!desc.setter) {
// Be wary of the odd explicit undefined setter case possible through
// Object.defineProperty.
if (!(desc.attrs & JSPROP_SETTER))
desc.setter = JS_StrictPropertyStub;
} else if ((desc.attrs & JSPROP_SETTER) || desc.setter != JS_StrictPropertyStub) {
if (!CallSetter(cx, receiver, id, desc.setter, desc.attrs, desc.shortid, strict, vp))
return false;
if (!proxy->isProxy() || GetProxyHandler(proxy) != this)
return true;
if (desc.attrs & JSPROP_SHARED)
return true;
}
if (!desc.getter) {
// Same as above for the null setter case.
if (!(desc.attrs & JSPROP_GETTER))
desc.getter = JS_PropertyStub;
}
desc.value = vp.get();
return defineProperty(cx, receiver, id, &desc);
}
if (!getPropertyDescriptor(cx, proxy, id, &desc, JSRESOLVE_ASSIGNING))
return false;
if (desc.obj) {
// Check for read-only properties.
if (desc.attrs & JSPROP_READONLY)
return strict ? Throw(cx, id, JSMSG_CANT_REDEFINE_PROP) : true;
if (!desc.setter) {
// Be wary of the odd explicit undefined setter case possible through
// Object.defineProperty.
if (!(desc.attrs & JSPROP_SETTER))
desc.setter = JS_StrictPropertyStub;
} else if ((desc.attrs & JSPROP_SETTER) || desc.setter != JS_StrictPropertyStub) {
if (!CallSetter(cx, receiver, id, desc.setter, desc.attrs, desc.shortid, strict, vp))
return false;
if (!proxy->isProxy() || GetProxyHandler(proxy) != this)
return true;
if (desc.attrs & JSPROP_SHARED)
return true;
}
if (!desc.getter) {
// Same as above for the null setter case.
if (!(desc.attrs & JSPROP_GETTER))
desc.getter = JS_PropertyStub;
}
desc.value = vp.get();
return defineProperty(cx, receiver, id, &desc);
}
desc.obj = receiver;
desc.value = vp.get();
desc.attrs = JSPROP_ENUMERATE;
desc.shortid = 0;
desc.getter = NULL;
desc.setter = NULL; // Pick up the class getter/setter.
return defineProperty(cx, receiver, id, &desc);
}
bool
BaseProxyHandler::keys(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
JS_ASSERT(props.length() == 0);
if (!getOwnPropertyNames(cx, proxy, props))
return false;
/* Select only the enumerable properties through in-place iteration. */
AutoPropertyDescriptorRooter desc(cx);
RootedId id(cx);
size_t i = 0;
for (size_t j = 0, len = props.length(); j < len; j++) {
JS_ASSERT(i <= j);
id = props[j];
AutoWaivePolicy policy(cx, proxy, id);
if (!getOwnPropertyDescriptor(cx, proxy, id, &desc, 0))
return false;
if (desc.obj && (desc.attrs & JSPROP_ENUMERATE))
props[i++] = id;
}
JS_ASSERT(i <= props.length());
props.resize(i);
return true;
}
bool
BaseProxyHandler::iterate(JSContext *cx, HandleObject proxy, unsigned flags, MutableHandleValue vp)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
AutoIdVector props(cx);
if ((flags & JSITER_OWNONLY)
? !keys(cx, proxy, props)
: !enumerate(cx, proxy, props)) {
return false;
}
return EnumeratedIdVectorToIterator(cx, proxy, flags, props, vp);
}
bool
BaseProxyHandler::call(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
JS_NOT_REACHED("callable proxies should implement call trap");
return false;
}
bool
BaseProxyHandler::construct(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
JS_NOT_REACHED("callable proxies should implement construct trap");
return false;
}
const char *
BaseProxyHandler::className(JSContext *cx, HandleObject proxy)
{
return IsFunctionProxy(proxy) ? "Function" : "Object";
}
JSString *
BaseProxyHandler::fun_toString(JSContext *cx, HandleObject proxy, unsigned indent)
{
JS_NOT_REACHED("callable proxies should implement fun_toString trap");
return NULL;
}
bool
BaseProxyHandler::regexp_toShared(JSContext *cx, HandleObject proxy,
RegExpGuard *g)
{
JS_NOT_REACHED("This should have been a wrapped regexp");
return false;
}
bool
BaseProxyHandler::defaultValue(JSContext *cx, HandleObject proxy, JSType hint,
MutableHandleValue vp)
{
return DefaultValue(cx, proxy, hint, vp);
}
bool
BaseProxyHandler::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl, CallArgs args)
{
ReportIncompatible(cx, args);
return false;
}
bool
BaseProxyHandler::hasInstance(JSContext *cx, HandleObject proxy, MutableHandleValue v, bool *bp)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedValue val(cx, ObjectValue(*proxy.get()));
js_ReportValueError(cx, JSMSG_BAD_INSTANCEOF_RHS,
JSDVG_SEARCH_STACK, val, NullPtr());
return false;
}
bool
BaseProxyHandler::objectClassIs(HandleObject proxy, ESClassValue classValue, JSContext *cx)
{
return false;
}
void
BaseProxyHandler::finalize(JSFreeOp *fop, JSObject *proxy)
{
}
JSObject *
BaseProxyHandler::weakmapKeyDelegate(JSObject *proxy)
{
return NULL;
}
bool
BaseProxyHandler::getPrototypeOf(JSContext *cx, HandleObject proxy, MutableHandleObject protop)
{
// The default implementation here just uses proto of the proxy object.
protop.set(proxy->getTaggedProto().toObjectOrNull());
return true;
}
bool
DirectProxyHandler::getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags)
{
assertEnteredPolicy(cx, proxy, id);
JS_ASSERT(!hasPrototype()); // Should never be called if there's a prototype.
RootedObject target(cx, GetProxyTargetObject(proxy));
return JS_GetPropertyDescriptorById(cx, target, id, 0, desc);
}
static bool
GetOwnPropertyDescriptor(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
JSPropertyDescriptor *desc)
{
// If obj is a proxy, we can do better than just guessing. This is
// important for certain types of wrappers that wrap other wrappers.
if (obj->isProxy())
return Proxy::getOwnPropertyDescriptor(cx, obj, id, desc, flags);
if (!JS_GetPropertyDescriptorById(cx, obj, id, flags, desc))
return false;
if (desc->obj != obj)
desc->obj = NULL;
return true;
}
bool
DirectProxyHandler::getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy,
HandleId id, PropertyDescriptor *desc, unsigned flags)
{
assertEnteredPolicy(cx, proxy, id);
RootedObject target(cx, GetProxyTargetObject(proxy));
return GetOwnPropertyDescriptor(cx, target, id, 0, desc);
}
bool
DirectProxyHandler::defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc)
{
assertEnteredPolicy(cx, proxy, id);
RootedObject target(cx, GetProxyTargetObject(proxy));
RootedValue v(cx, desc->value);
return CheckDefineProperty(cx, target, id, v, desc->getter, desc->setter, desc->attrs) &&
JS_DefinePropertyById(cx, target, id, v, desc->getter, desc->setter, desc->attrs);
}
bool
DirectProxyHandler::getOwnPropertyNames(JSContext *cx, HandleObject proxy,
AutoIdVector &props)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedObject target(cx, GetProxyTargetObject(proxy));
return GetPropertyNames(cx, target, JSITER_OWNONLY | JSITER_HIDDEN, &props);
}
bool
DirectProxyHandler::delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
assertEnteredPolicy(cx, proxy, id);
RootedObject target(cx, GetProxyTargetObject(proxy));
RootedValue v(cx);
if (!JS_DeletePropertyById2(cx, target, id, v.address()))
return false;
JSBool b;
if (!JS_ValueToBoolean(cx, v, &b))
return false;
*bp = !!b;
return true;
}
bool
DirectProxyHandler::enumerate(JSContext *cx, HandleObject proxy,
AutoIdVector &props)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
JS_ASSERT(!hasPrototype()); // Should never be called if there's a prototype.
RootedObject target(cx, GetProxyTargetObject(proxy));
return GetPropertyNames(cx, target, 0, &props);
}
bool
DirectProxyHandler::call(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedValue target(cx, GetProxyPrivate(proxy));
return Invoke(cx, args.thisv(), target, args.length(), args.array(), args.rval().address());
}
bool
DirectProxyHandler::construct(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedValue target(cx, GetProxyPrivate(proxy));
return InvokeConstructor(cx, target, args.length(), args.array(), args.rval().address());
}
bool
DirectProxyHandler::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
CallArgs args)
{
args.setThis(ObjectValue(*GetProxyTargetObject(&args.thisv().toObject())));
if (!test(args.thisv())) {
ReportIncompatible(cx, args);
return false;
}
return CallNativeImpl(cx, impl, args);
}
bool
DirectProxyHandler::hasInstance(JSContext *cx, HandleObject proxy, MutableHandleValue v,
bool *bp)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
JSBool b;
RootedObject target(cx, GetProxyTargetObject(proxy));
if (!JS_HasInstance(cx, target, v, &b))
return false;
*bp = !!b;
return true;
}
bool
DirectProxyHandler::objectClassIs(HandleObject proxy, ESClassValue classValue,
JSContext *cx)
{
RootedObject obj(cx, GetProxyTargetObject(proxy));
return ObjectClassIs(obj, classValue, cx);
}
const char *
DirectProxyHandler::className(JSContext *cx, HandleObject proxy)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedObject target(cx, GetProxyTargetObject(proxy));
return JSObject::className(cx, target);
}
JSString *
DirectProxyHandler::fun_toString(JSContext *cx, HandleObject proxy,
unsigned indent)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedObject target(cx, GetProxyTargetObject(proxy));
return fun_toStringHelper(cx, target, indent);
}
bool
DirectProxyHandler::regexp_toShared(JSContext *cx, HandleObject proxy,
RegExpGuard *g)
{
RootedObject target(cx, GetProxyTargetObject(proxy));
return RegExpToShared(cx, target, g);
}
bool
DirectProxyHandler::defaultValue(JSContext *cx, HandleObject proxy, JSType hint,
MutableHandleValue vp)
{
vp.set(ObjectValue(*GetProxyTargetObject(proxy)));
if (hint == JSTYPE_VOID)
return ToPrimitive(cx, vp);
return ToPrimitive(cx, hint, vp);
}
JSObject *
DirectProxyHandler::weakmapKeyDelegate(JSObject *proxy)
{
return UncheckedUnwrap(proxy);
}
DirectProxyHandler::DirectProxyHandler(void *family)
: BaseProxyHandler(family)
{
}
bool
DirectProxyHandler::has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
assertEnteredPolicy(cx, proxy, id);
JS_ASSERT(!hasPrototype()); // Should never be called if there's a prototype.
JSBool found;
RootedObject target(cx, GetProxyTargetObject(proxy));
if (!JS_HasPropertyById(cx, target, id, &found))
return false;
*bp = !!found;
return true;
}
bool
DirectProxyHandler::hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
assertEnteredPolicy(cx, proxy, id);
RootedObject target(cx, GetProxyTargetObject(proxy));
AutoPropertyDescriptorRooter desc(cx);
if (!JS_GetPropertyDescriptorById(cx, target, id, 0, &desc))
return false;
*bp = (desc.obj == target);
return true;
}
bool
DirectProxyHandler::get(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, MutableHandleValue vp)
{
assertEnteredPolicy(cx, proxy, id);
RootedObject target(cx, GetProxyTargetObject(proxy));
return JSObject::getGeneric(cx, target, receiver, id, vp);
}
bool
DirectProxyHandler::set(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, bool strict, MutableHandleValue vp)
{
assertEnteredPolicy(cx, proxy, id);
RootedObject target(cx, GetProxyTargetObject(proxy));
return JSObject::setGeneric(cx, target, receiver, id, vp, strict);
}
bool
DirectProxyHandler::keys(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedObject target(cx, GetProxyTargetObject(proxy));
return GetPropertyNames(cx, target, JSITER_OWNONLY, &props);
}
bool
DirectProxyHandler::iterate(JSContext *cx, HandleObject proxy, unsigned flags,
MutableHandleValue vp)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
JS_ASSERT(!hasPrototype()); // Should never be called if there's a prototype.
RootedObject target(cx, GetProxyTargetObject(proxy));
return GetIterator(cx, target, flags, vp);
}
bool
DirectProxyHandler::isExtensible(JSObject *proxy)
{
return GetProxyTargetObject(proxy)->isExtensible();
}
bool
DirectProxyHandler::preventExtensions(JSContext *cx, HandleObject proxy)
{
RootedObject target(cx, GetProxyTargetObject(proxy));
return JSObject::preventExtensions(cx, target);
}
static bool
GetFundamentalTrap(JSContext *cx, HandleObject handler, HandlePropertyName name,
MutableHandleValue fvalp)
{
JS_CHECK_RECURSION(cx, return false);
return JSObject::getProperty(cx, handler, handler, name, fvalp);
}
static bool
GetDerivedTrap(JSContext *cx, HandleObject handler, HandlePropertyName name,
MutableHandleValue fvalp)
{
JS_ASSERT(name == cx->names().has ||
name == cx->names().hasOwn ||
name == cx->names().get ||
name == cx->names().set ||
name == cx->names().keys ||
name == cx->names().iterate);
return JSObject::getProperty(cx, handler, handler, name, fvalp);
}
static bool
Trap(JSContext *cx, HandleObject handler, HandleValue fval, unsigned argc, Value* argv,
MutableHandleValue rval)
{
return Invoke(cx, ObjectValue(*handler), fval, argc, argv, rval.address());
}
static bool
Trap1(JSContext *cx, HandleObject handler, HandleValue fval, HandleId id, MutableHandleValue rval)
{
rval.set(IdToValue(id)); // Re-use out-param to avoid Rooted overhead.
JSString *str = ToString<CanGC>(cx, rval);
if (!str)
return false;
rval.setString(str);
return Trap(cx, handler, fval, 1, rval.address(), rval);
}
static bool
Trap2(JSContext *cx, HandleObject handler, HandleValue fval, HandleId id, Value v_,
MutableHandleValue rval)
{
RootedValue v(cx, v_);
rval.set(IdToValue(id)); // Re-use out-param to avoid Rooted overhead.
JSString *str = ToString<CanGC>(cx, rval);
if (!str)
return false;
rval.setString(str);
Value argv[2] = { rval.get(), v };
AutoValueArray ava(cx, argv, 2);
return Trap(cx, handler, fval, 2, argv, rval);
}
static bool
ParsePropertyDescriptorObject(JSContext *cx, HandleObject obj, const Value &v,
PropertyDescriptor *desc, bool complete = false)
{
AutoPropDescArrayRooter descs(cx);
PropDesc *d = descs.append();
if (!d || !d->initialize(cx, v))
return false;
if (complete)
d->complete();
desc->obj = obj;
desc->value = d->hasValue() ? d->value() : UndefinedValue();
JS_ASSERT(!(d->attributes() & JSPROP_SHORTID));
desc->attrs = d->attributes();
desc->getter = d->getter();
desc->setter = d->setter();
desc->shortid = 0;
return true;
}
static bool
IndicatePropertyNotFound(PropertyDescriptor *desc)
{
desc->obj = NULL;
return true;
}
static bool
ValueToBool(const Value &v, bool *bp)
{
*bp = ToBoolean(v);
return true;
}
static bool
ArrayToIdVector(JSContext *cx, const Value &array, AutoIdVector &props)
{
JS_ASSERT(props.length() == 0);
if (array.isPrimitive())
return true;
RootedObject obj(cx, &array.toObject());
uint32_t length;
if (!GetLengthProperty(cx, obj, &length))
return false;
RootedValue v(cx);
for (uint32_t n = 0; n < length; ++n) {
if (!JS_CHECK_OPERATION_LIMIT(cx))
return false;
if (!JSObject::getElement(cx, obj, obj, n, &v))
return false;
RootedId id(cx);
if (!ValueToId<CanGC>(cx, v, &id))
return false;
if (!props.append(id))
return false;
}
return true;
}
/* Derived class for all scripted indirect proxy handlers. */
class ScriptedIndirectProxyHandler : public BaseProxyHandler
{
public:
ScriptedIndirectProxyHandler();
virtual ~ScriptedIndirectProxyHandler();
/* ES5 Harmony fundamental proxy traps. */
virtual bool preventExtensions(JSContext *cx, HandleObject proxy) MOZ_OVERRIDE;
virtual bool getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags) MOZ_OVERRIDE;
virtual bool getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags) MOZ_OVERRIDE;
virtual bool defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc) MOZ_OVERRIDE;
virtual bool getOwnPropertyNames(JSContext *cx, HandleObject proxy, AutoIdVector &props);
virtual bool delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
virtual bool enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props) MOZ_OVERRIDE;
/* ES5 Harmony derived proxy traps. */
virtual bool has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
virtual bool hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
virtual bool get(JSContext *cx, HandleObject proxy, HandleObject receiver, HandleId id,
MutableHandleValue vp) MOZ_OVERRIDE;
virtual bool set(JSContext *cx, HandleObject proxy, HandleObject receiver, HandleId id,
bool strict, MutableHandleValue vp) MOZ_OVERRIDE;
virtual bool keys(JSContext *cx, HandleObject proxy, AutoIdVector &props) MOZ_OVERRIDE;
virtual bool iterate(JSContext *cx, HandleObject proxy, unsigned flags,
MutableHandleValue vp) MOZ_OVERRIDE;
/* Spidermonkey extensions. */
virtual bool isExtensible(JSObject *proxy) MOZ_OVERRIDE;
virtual bool call(JSContext *cx, HandleObject proxy, const CallArgs &args) MOZ_OVERRIDE;
virtual bool construct(JSContext *cx, HandleObject proxy, const CallArgs &args) MOZ_OVERRIDE;
virtual bool nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
CallArgs args) MOZ_OVERRIDE;
virtual JSString *fun_toString(JSContext *cx, HandleObject proxy, unsigned indent) MOZ_OVERRIDE;
virtual bool defaultValue(JSContext *cx, HandleObject obj, JSType hint,
MutableHandleValue vp) MOZ_OVERRIDE;
static ScriptedIndirectProxyHandler singleton;
};
static int sScriptedIndirectProxyHandlerFamily = 0;
ScriptedIndirectProxyHandler::ScriptedIndirectProxyHandler()
: BaseProxyHandler(&sScriptedIndirectProxyHandlerFamily)
{
}
ScriptedIndirectProxyHandler::~ScriptedIndirectProxyHandler()
{
}
bool
ScriptedIndirectProxyHandler::isExtensible(JSObject *proxy)
{
// Scripted indirect proxies don't support extensibility changes.
return true;
}
bool
ScriptedIndirectProxyHandler::preventExtensions(JSContext *cx, HandleObject proxy)
{
// See above.
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_CHANGE_EXTENSIBILITY);
return false;
}
static bool
ReturnedValueMustNotBePrimitive(JSContext *cx, HandleObject proxy, JSAtom *atom, const Value &v)
{
if (v.isPrimitive()) {
JSAutoByteString bytes;
if (js_AtomToPrintableString(cx, atom, &bytes)) {
RootedValue val(cx, ObjectOrNullValue(proxy));
js_ReportValueError2(cx, JSMSG_BAD_TRAP_RETURN_VALUE,
JSDVG_SEARCH_STACK, val, NullPtr(), bytes.ptr());
}
return false;
}
return true;
}
static JSObject *
GetIndirectProxyHandlerObject(JSObject *proxy)
{
return GetProxyPrivate(proxy).toObjectOrNull();
}
bool
ScriptedIndirectProxyHandler::getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
return GetFundamentalTrap(cx, handler, cx->names().getPropertyDescriptor, &fval) &&
Trap1(cx, handler, fval, id, &value) &&
((value.get().isUndefined() && IndicatePropertyNotFound(desc)) ||
(ReturnedValueMustNotBePrimitive(cx, proxy, cx->names().getPropertyDescriptor, value) &&
ParsePropertyDescriptorObject(cx, proxy, value, desc)));
}
bool
ScriptedIndirectProxyHandler::getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
return GetFundamentalTrap(cx, handler, cx->names().getOwnPropertyDescriptor, &fval) &&
Trap1(cx, handler, fval, id, &value) &&
((value.get().isUndefined() && IndicatePropertyNotFound(desc)) ||
(ReturnedValueMustNotBePrimitive(cx, proxy, cx->names().getPropertyDescriptor, value) &&
ParsePropertyDescriptorObject(cx, proxy, value, desc)));
}
bool
ScriptedIndirectProxyHandler::defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
return GetFundamentalTrap(cx, handler, cx->names().defineProperty, &fval) &&
NewPropertyDescriptorObject(cx, desc, &value) &&
Trap2(cx, handler, fval, id, value, &value);
}
bool
ScriptedIndirectProxyHandler::getOwnPropertyNames(JSContext *cx, HandleObject proxy,
AutoIdVector &props)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
return GetFundamentalTrap(cx, handler, cx->names().getOwnPropertyNames, &fval) &&
Trap(cx, handler, fval, 0, NULL, &value) &&
ArrayToIdVector(cx, value, props);
}
bool
ScriptedIndirectProxyHandler::delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
return GetFundamentalTrap(cx, handler, cx->names().delete_, &fval) &&
Trap1(cx, handler, fval, id, &value) &&
ValueToBool(value, bp);
}
bool
ScriptedIndirectProxyHandler::enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
return GetFundamentalTrap(cx, handler, cx->names().enumerate, &fval) &&
Trap(cx, handler, fval, 0, NULL, &value) &&
ArrayToIdVector(cx, value, props);
}
bool
ScriptedIndirectProxyHandler::has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
if (!GetDerivedTrap(cx, handler, cx->names().has, &fval))
return false;
if (!js_IsCallable(fval))
return BaseProxyHandler::has(cx, proxy, id, bp);
return Trap1(cx, handler, fval, id, &value) &&
ValueToBool(value, bp);
}
bool
ScriptedIndirectProxyHandler::hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue fval(cx), value(cx);
if (!GetDerivedTrap(cx, handler, cx->names().hasOwn, &fval))
return false;
if (!js_IsCallable(fval))
return BaseProxyHandler::hasOwn(cx, proxy, id, bp);
return Trap1(cx, handler, fval, id, &value) &&
ValueToBool(value, bp);
}
bool
ScriptedIndirectProxyHandler::get(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, MutableHandleValue vp)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue idv(cx, IdToValue(id));
JSString *str = ToString<CanGC>(cx, idv);
if (!str)
return false;
RootedValue value(cx, StringValue(str));
Value argv[] = { ObjectOrNullValue(receiver), value };
AutoValueArray ava(cx, argv, 2);
RootedValue fval(cx);
if (!GetDerivedTrap(cx, handler, cx->names().get, &fval))
return false;
if (!js_IsCallable(fval))
return BaseProxyHandler::get(cx, proxy, receiver, id, vp);
return Trap(cx, handler, fval, 2, argv, vp);
}
bool
ScriptedIndirectProxyHandler::set(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, bool strict, MutableHandleValue vp)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue idv(cx, IdToValue(id));
JSString *str = ToString<CanGC>(cx, idv);
if (!str)
return false;
RootedValue value(cx, StringValue(str));
Value argv[] = { ObjectOrNullValue(receiver), value, vp.get() };
AutoValueArray ava(cx, argv, 3);
RootedValue fval(cx);
if (!GetDerivedTrap(cx, handler, cx->names().set, &fval))
return false;
if (!js_IsCallable(fval))
return BaseProxyHandler::set(cx, proxy, receiver, id, strict, vp);
return Trap(cx, handler, fval, 3, argv, &value);
}
bool
ScriptedIndirectProxyHandler::keys(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue value(cx);
if (!GetDerivedTrap(cx, handler, cx->names().keys, &value))
return false;
if (!js_IsCallable(value))
return BaseProxyHandler::keys(cx, proxy, props);
return Trap(cx, handler, value, 0, NULL, &value) &&
ArrayToIdVector(cx, value, props);
}
bool
ScriptedIndirectProxyHandler::iterate(JSContext *cx, HandleObject proxy, unsigned flags,
MutableHandleValue vp)
{
RootedObject handler(cx, GetIndirectProxyHandlerObject(proxy));
RootedValue value(cx);
if (!GetDerivedTrap(cx, handler, cx->names().iterate, &value))
return false;
if (!js_IsCallable(value))
return BaseProxyHandler::iterate(cx, proxy, flags, vp);
return Trap(cx, handler, value, 0, NULL, vp) &&
ReturnedValueMustNotBePrimitive(cx, proxy, cx->names().iterate, vp);
}
bool
ScriptedIndirectProxyHandler::call(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedValue call(cx, GetCall(proxy));
return Invoke(cx, args.thisv(), call, args.length(), args.array(), args.rval().address());
}
bool
ScriptedIndirectProxyHandler::construct(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
RootedValue fval(cx, GetConstruct(proxy));
if (fval.isUndefined())
fval = GetCall(proxy);
return InvokeConstructor(cx, fval, args.length(), args.array(), args.rval().address());
}
bool
ScriptedIndirectProxyHandler::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
CallArgs args)
{
return BaseProxyHandler::nativeCall(cx, test, impl, args);
}
JSString *
ScriptedIndirectProxyHandler::fun_toString(JSContext *cx, HandleObject proxy, unsigned indent)
{
assertEnteredPolicy(cx, proxy, JSID_VOID);
Value fval = GetCall(proxy);
if (IsFunctionProxy(proxy) &&
(fval.isPrimitive() || !fval.toObject().is<JSFunction>())) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL,
JSMSG_INCOMPATIBLE_PROTO,
js_Function_str, js_toString_str,
"object");
return NULL;
}
RootedObject obj(cx, &fval.toObject());
return fun_toStringHelper(cx, obj, indent);
}
bool
ScriptedIndirectProxyHandler::defaultValue(JSContext *cx, HandleObject proxy, JSType hint,
MutableHandleValue vp)
{
/*
* This function is only here to prevent bug 757063. It will be removed when
* the direct proxy refactor is complete.
*/
return BaseProxyHandler::defaultValue(cx, proxy, hint, vp);
}
ScriptedIndirectProxyHandler ScriptedIndirectProxyHandler::singleton;
static JSObject *
GetDirectProxyHandlerObject(JSObject *proxy)
{
return GetProxyExtra(proxy, 0).toObjectOrNull();
}
/* Derived class for all scripted direct proxy handlers. */
class ScriptedDirectProxyHandler : public DirectProxyHandler {
public:
ScriptedDirectProxyHandler();
virtual ~ScriptedDirectProxyHandler();
/* ES5 Harmony fundamental proxy traps. */
virtual bool preventExtensions(JSContext *cx, HandleObject proxy) MOZ_OVERRIDE;
virtual bool getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags) MOZ_OVERRIDE;
virtual bool getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags) MOZ_OVERRIDE;
virtual bool defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc) MOZ_OVERRIDE;
virtual bool getOwnPropertyNames(JSContext *cx, HandleObject proxy, AutoIdVector &props);
virtual bool delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
virtual bool enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props) MOZ_OVERRIDE;
/* ES5 Harmony derived proxy traps. */
virtual bool has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
virtual bool hasOwn(JSContext *cx,HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
virtual bool get(JSContext *cx, HandleObject proxy, HandleObject receiver, HandleId id,
MutableHandleValue vp) MOZ_OVERRIDE;
virtual bool set(JSContext *cx, HandleObject proxy, HandleObject receiver, HandleId id,
bool strict, MutableHandleValue vp) MOZ_OVERRIDE;
virtual bool keys(JSContext *cx, HandleObject proxy, AutoIdVector &props) MOZ_OVERRIDE;
virtual bool iterate(JSContext *cx, HandleObject proxy, unsigned flags,
MutableHandleValue vp) MOZ_OVERRIDE;
virtual bool call(JSContext *cx, HandleObject proxy, const CallArgs &args) MOZ_OVERRIDE;
virtual bool construct(JSContext *cx, HandleObject proxy, const CallArgs &args) MOZ_OVERRIDE;
static ScriptedDirectProxyHandler singleton;
};
static int sScriptedDirectProxyHandlerFamily = 0;
// Aux.2 FromGenericPropertyDescriptor(Desc)
static bool
FromGenericPropertyDescriptor(JSContext *cx, PropDesc *desc, MutableHandleValue rval)
{
// Aux.2 step 1
if (desc->isUndefined()) {
rval.setUndefined();
return true;
}
// steps 3-9
if (!desc->makeObject(cx))
return false;
rval.set(desc->pd());
return true;
}
/*
* Aux.3 NormalizePropertyDescriptor(Attributes)
*
* NOTE: to minimize code duplication, the code for this function is shared with
* that for Aux.4 NormalizeAndCompletePropertyDescriptor (see below). The
* argument complete is used to distinguish between the two.
*/
static bool
NormalizePropertyDescriptor(JSContext *cx, MutableHandleValue vp, bool complete = false)
{
// Aux.4 step 1
if (complete && vp.isUndefined())
return true;
// Aux.3 steps 1-2 / Aux.4 steps 2-3
AutoPropDescArrayRooter descs(cx);
PropDesc *desc = descs.append();
if (!desc || !desc->initialize(cx, vp.get()))
return false;
if (complete)
desc->complete();
JS_ASSERT(!vp.isPrimitive()); // due to desc->initialize
RootedObject attributes(cx, &vp.toObject());
/*
* Aux.3 step 3 / Aux.4 step 4
*
* NOTE: Aux.4 step 4 actually specifies FromPropertyDescriptor here.
* However, the way FromPropertyDescriptor is implemented (PropDesc::
* makeObject) is actually closer to FromGenericPropertyDescriptor,
* and is in fact used to implement the latter, so we might as well call it
* directly.
*/
if (!FromGenericPropertyDescriptor(cx, desc, vp))
return false;
if (vp.isUndefined())
return true;
RootedObject descObj(cx, &vp.toObject());
// Aux.3 steps 4-5 / Aux.4 steps 5-6
AutoIdVector props(cx);
if (!GetPropertyNames(cx, attributes, 0, &props))
return false;
size_t n = props.length();
for (size_t i = 0; i < n; ++i) {
RootedId id(cx, props[i]);
if (JSID_IS_ATOM(id)) {
JSAtom *atom = JSID_TO_ATOM(id);
const JSAtomState &atomState = cx->runtime()->atomState;
if (atom == atomState.value || atom == atomState.writable ||
atom == atomState.get || atom == atomState.set ||
atom == atomState.enumerable || atom == atomState.configurable)
{
continue;
}
}
RootedValue v(cx);
if (!JSObject::getGeneric(cx, descObj, attributes, id, &v))
return false;
if (!JSObject::defineGeneric(cx, descObj, id, v, NULL, NULL, JSPROP_ENUMERATE))
return false;
}
return true;
}
// Aux.4 NormalizeAndCompletePropertyDescriptor(Attributes)
static inline bool
NormalizeAndCompletePropertyDescriptor(JSContext *cx, MutableHandleValue vp)
{
return NormalizePropertyDescriptor(cx, vp, true);
}
static inline bool
IsDataDescriptor(const PropertyDescriptor &desc)
{
return desc.obj && !(desc.attrs & (JSPROP_GETTER | JSPROP_SETTER));
}
static inline bool
IsAccessorDescriptor(const PropertyDescriptor &desc)
{
return desc.obj && desc.attrs & (JSPROP_GETTER | JSPROP_SETTER);
}
// Aux.5 ValidateProperty(O, P, Desc)
static bool
ValidateProperty(JSContext *cx, HandleObject obj, HandleId id, PropDesc *desc, bool *bp)
{
// step 1
AutoPropertyDescriptorRooter current(cx);
if (!GetOwnPropertyDescriptor(cx, obj, id, 0, &current))
return false;
/*
* steps 2-4 are redundant since ValidateProperty is never called unless
* target.[[HasOwn]](P) is true
*/
JS_ASSERT(current.obj);
// step 5
if (!desc->hasValue() && !desc->hasWritable() && !desc->hasGet() && !desc->hasSet() &&
!desc->hasEnumerable() && !desc->hasConfigurable())
{
*bp = true;
return true;
}
// step 6
if ((!desc->hasWritable() || desc->writable() == !(current.attrs & JSPROP_READONLY)) &&
(!desc->hasGet() || desc->getter() == current.getter) &&
(!desc->hasSet() || desc->setter() == current.setter) &&
(!desc->hasEnumerable() || desc->enumerable() == bool(current.attrs & JSPROP_ENUMERATE)) &&
(!desc->hasConfigurable() || desc->configurable() == !(current.attrs & JSPROP_PERMANENT)))
{
if (!desc->hasValue()) {
*bp = true;
return true;
}
bool same = false;
if (!SameValue(cx, desc->value(), current.value, &same))
return false;
if (same) {
*bp = true;
return true;
}
}
// step 7
if (current.attrs & JSPROP_PERMANENT) {
if (desc->hasConfigurable() && desc->configurable()) {
*bp = false;
return true;
}
if (desc->hasEnumerable() &&
desc->enumerable() != bool(current.attrs & JSPROP_ENUMERATE))
{
*bp = false;
return true;
}
}
// step 8
if (desc->isGenericDescriptor()) {
*bp = true;
return true;
}
// step 9
if (IsDataDescriptor(current) != desc->isDataDescriptor()) {
*bp = !(current.attrs & JSPROP_PERMANENT);
return true;
}
// step 10
if (IsDataDescriptor(current)) {
JS_ASSERT(desc->isDataDescriptor()); // by step 9
if ((current.attrs & JSPROP_PERMANENT) && (current.attrs & JSPROP_READONLY)) {
if (desc->hasWritable() && desc->writable()) {
*bp = false;
return true;
}
if (desc->hasValue()) {
bool same;
if (!SameValue(cx, desc->value(), current.value, &same))
return false;
if (!same) {
*bp = false;
return true;
}
}
}
*bp = true;
return true;
}
// steps 11-12
JS_ASSERT(IsAccessorDescriptor(current)); // by step 10
JS_ASSERT(desc->isAccessorDescriptor()); // by step 9
*bp = (!(current.attrs & JSPROP_PERMANENT) ||
((!desc->hasSet() || desc->setter() == current.setter) &&
(!desc->hasGet() || desc->getter() == current.getter)));
return true;
}
// Aux.6 IsSealed(O, P)
static bool
IsSealed(JSContext* cx, HandleObject obj, HandleId id, bool *bp)
{
// step 1
AutoPropertyDescriptorRooter desc(cx);
if (!GetOwnPropertyDescriptor(cx, obj, id, 0, &desc))
return false;
// steps 2-3
*bp = desc.obj && (desc.attrs & JSPROP_PERMANENT);
return true;
}
static bool
HasOwn(JSContext *cx, HandleObject obj, HandleId id, bool *bp)
{
AutoPropertyDescriptorRooter desc(cx);
if (!JS_GetPropertyDescriptorById(cx, obj, id, 0, &desc))
return false;
*bp = (desc.obj == obj);
return true;
}
static bool
IdToValue(JSContext *cx, HandleId id, MutableHandleValue value)
{
value.set(IdToValue(id)); // Re-use out-param to avoid Rooted overhead.
JSString *name = ToString<CanGC>(cx, value);
if (!name)
return false;
value.set(StringValue(name));
return true;
}
// TrapGetOwnProperty(O, P)
static bool
TrapGetOwnProperty(JSContext *cx, HandleObject proxy, HandleId id, MutableHandleValue rval)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
// step 3
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().getOwnPropertyDescriptor, &trap))
return false;
// step 4
if (trap.isUndefined()) {
AutoPropertyDescriptorRooter desc(cx);
if (!GetOwnPropertyDescriptor(cx, target, id, &desc))
return false;
return NewPropertyDescriptorObject(cx, &desc, rval);
}
// step 5
RootedValue value(cx);
if (!IdToValue(cx, id, &value))
return false;
Value argv[] = {
ObjectValue(*target),
value
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 2, argv, trapResult.address()))
return false;
// step 6
if (!NormalizeAndCompletePropertyDescriptor(cx, &trapResult))
return false;
// step 7
if (trapResult.isUndefined()) {
bool sealed;
if (!IsSealed(cx, target, id, &sealed))
return false;
if (sealed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_NC_AS_NE);
return false;
}
if (!target->isExtensible()) {
bool found;
if (!HasOwn(cx, target, id, &found))
return false;
if (found) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_E_AS_NE);
return false;
}
}
rval.set(UndefinedValue());
return true;
}
// step 8
bool isFixed;
if (!HasOwn(cx, target, id, &isFixed))
return false;
// step 9
if (target->isExtensible() && !isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_NEW);
return false;
}
AutoPropDescArrayRooter descs(cx);
PropDesc *desc = descs.append();
if (!desc || !desc->initialize(cx, trapResult))
return false;
/* step 10 */
if (isFixed) {
bool valid;
if (!ValidateProperty(cx, target, id, desc, &valid))
return false;
if (!valid) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_INVALID);
return false;
}
}
// step 11
if (!desc->configurable() && !isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_NE_AS_NC);
return false;
}
// step 12
rval.set(trapResult);
return true;
}
// TrapDefineOwnProperty(O, P, DescObj, Throw)
static bool
TrapDefineOwnProperty(JSContext *cx, HandleObject proxy, HandleId id, MutableHandleValue vp)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
// step 3
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().defineProperty, &trap))
return false;
// step 4
if (trap.isUndefined()) {
AutoPropertyDescriptorRooter desc(cx);
if (!ParsePropertyDescriptorObject(cx, proxy, vp, &desc))
return false;
return JS_DefinePropertyById(cx, target, id, desc.value, desc.getter, desc.setter,
desc.attrs);
}
// step 5
RootedValue normalizedDesc(cx, vp);
if (!NormalizePropertyDescriptor(cx, &normalizedDesc))
return false;
// step 6
RootedValue value(cx);
if (!IdToValue(cx, id, &value))
return false;
Value argv[] = {
ObjectValue(*target),
value,
normalizedDesc
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 3, argv, trapResult.address()))
return false;
// steps 7-8
if (ToBoolean(trapResult)) {
bool isFixed;
if (!HasOwn(cx, target, id, &isFixed))
return false;
if (!target->isExtensible() && !isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_DEFINE_NEW);
return false;
}
AutoPropDescArrayRooter descs(cx);
PropDesc *desc = descs.append();
if (!desc || !desc->initialize(cx, normalizedDesc))
return false;
if (isFixed) {
bool valid;
if (!ValidateProperty(cx, target, id, desc, &valid))
return false;
if (!valid) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_DEFINE_INVALID);
return false;
}
}
if (!desc->configurable() && !isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_DEFINE_NE_AS_NC);
return false;
}
vp.set(BooleanValue(true));
return true;
}
// step 9
// FIXME: API does not include a Throw parameter
vp.set(BooleanValue(false));
return true;
}
static inline void
ReportInvalidTrapResult(JSContext *cx, JSObject *proxy, JSAtom *atom)
{
RootedValue v(cx, ObjectOrNullValue(proxy));
JSAutoByteString bytes;
if (!js_AtomToPrintableString(cx, atom, &bytes))
return;
js_ReportValueError2(cx, JSMSG_INVALID_TRAP_RESULT, JSDVG_IGNORE_STACK, v,
NullPtr(), bytes.ptr());
}
// This function is shared between getOwnPropertyNames, enumerate, and keys
static bool
ArrayToIdVector(JSContext *cx, HandleObject proxy, HandleObject target, HandleValue v,
AutoIdVector &props, unsigned flags, JSAtom *trapName_)
{
JS_ASSERT(v.isObject());
RootedObject array(cx, &v.toObject());
RootedAtom trapName(cx, trapName_);
// steps g-h
uint32_t n;
if (!GetLengthProperty(cx, array, &n))
return false;
// steps i-k
for (uint32_t i = 0; i < n; ++i) {
// step i
RootedValue v(cx);
if (!JSObject::getElement(cx, array, array, i, &v))
return false;
// step ii
RootedId id(cx);
if (!ValueToId<CanGC>(cx, v, &id))
return false;
// step iii
for (uint32_t j = 0; j < i; ++j) {
if (props[j] == id) {
ReportInvalidTrapResult(cx, proxy, trapName);
return false;
}
}
// step iv
bool isFixed;
if (!HasOwn(cx, target, id, &isFixed))
return false;
// step v
if (!target->isExtensible() && !isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_NEW);
return false;
}
// step vi
if (!props.append(id))
return false;
}
// step l
AutoIdVector ownProps(cx);
if (!GetPropertyNames(cx, target, flags, &ownProps))
return false;
// step m
for (size_t i = 0; i < ownProps.length(); ++i) {
RootedId id(cx, ownProps[i]);
bool found = false;
for (size_t j = 0; j < props.length(); ++j) {
if (props[j] == id) {
found = true;
break;
}
}
if (found)
continue;
// step i
bool sealed;
if (!IsSealed(cx, target, id, &sealed))
return false;
if (sealed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_SKIP_NC);
return false;
}
// step ii
bool isFixed;
if (!HasOwn(cx, target, id, &isFixed))
return false;
// step iii
if (!target->isExtensible() && isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_E_AS_NE);
return false;
}
}
// step n
return true;
}
ScriptedDirectProxyHandler::ScriptedDirectProxyHandler()
: DirectProxyHandler(&sScriptedDirectProxyHandlerFamily)
{
}
ScriptedDirectProxyHandler::~ScriptedDirectProxyHandler()
{
}
bool
ScriptedDirectProxyHandler::preventExtensions(JSContext *cx, HandleObject proxy)
{
// step a
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step b
RootedObject target(cx, GetProxyTargetObject(proxy));
// step c
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().preventExtensions, &trap))
return false;
// step d
if (trap.isUndefined())
return DirectProxyHandler::preventExtensions(cx, proxy);
// step e
Value argv[] = {
ObjectValue(*target)
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 1, argv, trapResult.address()))
return false;
// step f
bool success = ToBoolean(trapResult);
if (success) {
// step g
if (target->isExtensible()) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_AS_NON_EXTENSIBLE);
return false;
}
return true;
}
// step h
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_CHANGE_EXTENSIBILITY);
return false;
}
// FIXME: Move to Proxy::getPropertyDescriptor once ScriptedIndirectProxy is removed
bool
ScriptedDirectProxyHandler::getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags)
{
JS_CHECK_RECURSION(cx, return false);
if (!GetOwnPropertyDescriptor(cx, proxy, id, desc))
return false;
if (desc->obj)
return true;
RootedObject proto(cx);
if (!JSObject::getProto(cx, proxy, &proto))
return false;
if (!proto) {
JS_ASSERT(!desc->obj);
return true;
}
return JS_GetPropertyDescriptorById(cx, proto, id, 0, desc);
}
bool
ScriptedDirectProxyHandler::getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags)
{
// step 1
RootedValue v(cx);
if (!TrapGetOwnProperty(cx, proxy, id, &v))
return false;
// step 2
if (v.isUndefined()) {
desc->obj = NULL;
return true;
}
// steps 3-4
return ParsePropertyDescriptorObject(cx, proxy, v, desc, true);
}
bool
ScriptedDirectProxyHandler::defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc)
{
// step 1
AutoPropDescArrayRooter descs(cx);
PropDesc *d = descs.append();
d->initFromPropertyDescriptor(*desc);
RootedValue v(cx);
if (!FromGenericPropertyDescriptor(cx, d, &v))
return false;
// step 2
return TrapDefineOwnProperty(cx, proxy, id, &v);
}
bool
ScriptedDirectProxyHandler::getOwnPropertyNames(JSContext *cx, HandleObject proxy,
AutoIdVector &props)
{
// step a
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step b
RootedObject target(cx, GetProxyTargetObject(proxy));
// step c
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().getOwnPropertyNames, &trap))
return false;
// step d
if (trap.isUndefined())
return DirectProxyHandler::getOwnPropertyNames(cx, proxy, props);
// step e
Value argv[] = {
ObjectValue(*target)
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 1, argv, trapResult.address()))
return false;
// step f
if (trapResult.isPrimitive()) {
ReportInvalidTrapResult(cx, proxy, cx->names().getOwnPropertyNames);
return false;
}
// steps g to n are shared
return ArrayToIdVector(cx, proxy, target, trapResult, props, JSITER_OWNONLY | JSITER_HIDDEN,
cx->names().getOwnPropertyNames);
}
// Proxy.[[Delete]](P, Throw)
bool
ScriptedDirectProxyHandler::delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
// step 3
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().deleteProperty, &trap))
return false;
// step 4
if (trap.isUndefined())
return DirectProxyHandler::delete_(cx, proxy, id, bp);
// step 5
RootedValue value(cx);
if (!IdToValue(cx, id, &value))
return false;
Value argv[] = {
ObjectValue(*target),
value
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 2, argv, trapResult.address()))
return false;
// step 6-7
if (ToBoolean(trapResult)) {
bool sealed;
if (!IsSealed(cx, target, id, &sealed))
return false;
if (sealed) {
RootedValue v(cx, IdToValue(id));
js_ReportValueError(cx, JSMSG_CANT_DELETE, JSDVG_IGNORE_STACK, v, NullPtr());
return false;
}
*bp = true;
return true;
}
// step 8
// FIXME: API does not include a Throw parameter
*bp = false;
return true;
}
// 12.6.4 The for-in Statement, step 6
bool
ScriptedDirectProxyHandler::enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
// step a
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step b
RootedObject target(cx, GetProxyTargetObject(proxy));
// step c
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().enumerate, &trap))
return false;
// step d
if (trap.isUndefined())
return DirectProxyHandler::enumerate(cx, proxy, props);
// step e
Value argv[] = {
ObjectOrNullValue(target)
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 1, argv, trapResult.address()))
return false;
// step f
if (trapResult.isPrimitive()) {
JSAutoByteString bytes;
if (!js_AtomToPrintableString(cx, cx->names().enumerate, &bytes))
return false;
RootedValue v(cx, ObjectOrNullValue(proxy));
js_ReportValueError2(cx, JSMSG_INVALID_TRAP_RESULT, JSDVG_SEARCH_STACK,
v, NullPtr(), bytes.ptr());
return false;
}
// steps g-m are shared
// FIXME: the trap should return an iterator object, see bug 783826
return ArrayToIdVector(cx, proxy, target, trapResult, props, 0, cx->names().enumerate);
}
// Proxy.[[HasProperty]](P)
bool
ScriptedDirectProxyHandler::has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
// step 3
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().has, &trap))
return false;
// step 4
if (trap.isUndefined())
return DirectProxyHandler::has(cx, proxy, id, bp);
// step 5
RootedValue value(cx);
if (!IdToValue(cx, id, &value))
return false;
Value argv[] = {
ObjectOrNullValue(target),
value
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 2, argv, trapResult.address()))
return false;
// step 6
bool success = ToBoolean(trapResult);;
// step 7
if (!success) {
bool sealed;
if (!IsSealed(cx, target, id, &sealed))
return false;
if (sealed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_NC_AS_NE);
return false;
}
if (!target->isExtensible()) {
bool isFixed;
if (!HasOwn(cx, target, id, &isFixed))
return false;
if (isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_E_AS_NE);
return false;
}
}
}
// step 8
*bp = success;
return true;
}
// Proxy.[[HasOwnProperty]](P)
bool
ScriptedDirectProxyHandler::hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
// step 3
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().hasOwn, &trap))
return false;
// step 4
if (trap.isUndefined())
return DirectProxyHandler::hasOwn(cx, proxy, id, bp);
// step 5
RootedValue value(cx);
if (!IdToValue(cx, id, &value))
return false;
Value argv[] = {
ObjectOrNullValue(target),
value
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 2, argv, trapResult.address()))
return false;
// step 6
bool success = ToBoolean(trapResult);
// steps 7-8
if (!success) {
bool sealed;
if (!IsSealed(cx, target, id, &sealed))
return false;
if (sealed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_NC_AS_NE);
return false;
}
if (!target->isExtensible()) {
bool isFixed;
if (!HasOwn(cx, target, id, &isFixed))
return false;
if (isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_E_AS_NE);
return false;
}
}
} else if (!target->isExtensible()) {
bool isFixed;
if (!HasOwn(cx, target, id, &isFixed))
return false;
if (!isFixed) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_REPORT_NEW);
return false;
}
}
// step 9
*bp = !!success;
return true;
}
// Proxy.[[GetP]](P, Receiver)
bool
ScriptedDirectProxyHandler::get(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, MutableHandleValue vp)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
// step 3
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().get, &trap))
return false;
// step 4
if (trap.isUndefined())
return DirectProxyHandler::get(cx, proxy, receiver, id, vp);
// step 5
RootedValue value(cx);
if (!IdToValue(cx, id, &value))
return false;
Value argv[] = {
ObjectOrNullValue(target),
value,
ObjectOrNullValue(receiver)
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 3, argv, trapResult.address()))
return false;
// step 6
AutoPropertyDescriptorRooter desc(cx);
if (!GetOwnPropertyDescriptor(cx, target, id, &desc))
return false;
// step 7
if (desc.obj) {
if (IsDataDescriptor(desc) &&
(desc.attrs & JSPROP_PERMANENT) &&
(desc.attrs & JSPROP_READONLY))
{
bool same;
if (!SameValue(cx, vp, desc.value, &same))
return false;
if (!same) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MUST_REPORT_SAME_VALUE);
return false;
}
}
if (IsAccessorDescriptor(desc) &&
(desc.attrs & JSPROP_PERMANENT) &&
!(desc.attrs & JSPROP_GETTER))
{
if (!trapResult.isUndefined()) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MUST_REPORT_UNDEFINED);
return false;
}
}
}
// step 8
vp.set(trapResult);
return true;
}
// Proxy.[[SetP]](P, V, Receiver)
bool
ScriptedDirectProxyHandler::set(JSContext *cx, HandleObject proxy, HandleObject receiver,
HandleId id, bool strict, MutableHandleValue vp)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
// step 3
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().set, &trap))
return false;
// step 4
if (trap.isUndefined())
return DirectProxyHandler::set(cx, proxy, receiver, id, strict, vp);
// step 5
RootedValue value(cx);
if (!IdToValue(cx, id, &value))
return false;
Value argv[] = {
ObjectOrNullValue(target),
value,
vp.get(),
ObjectValue(*receiver)
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 4, argv, trapResult.address()))
return false;
// step 6
bool success = ToBoolean(trapResult);
// step 7
if (success) {
AutoPropertyDescriptorRooter desc(cx);
if (!GetOwnPropertyDescriptor(cx, target, id, &desc))
return false;
if (desc.obj) {
if (IsDataDescriptor(desc) && (desc.attrs & JSPROP_PERMANENT) &&
(desc.attrs & JSPROP_READONLY)) {
bool same;
if (!SameValue(cx, vp, desc.value, &same))
return false;
if (!same) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_SET_NW_NC);
return false;
}
}
if (IsAccessorDescriptor(desc) && (desc.attrs & JSPROP_PERMANENT)) {
if (!(desc.attrs & JSPROP_SETTER)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_SET_WO_SETTER);
return false;
}
}
}
}
// step 8
vp.set(BooleanValue(success));
return true;
}
// 15.2.3.14 Object.keys (O), step 2
bool
ScriptedDirectProxyHandler::keys(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
// step a
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step b
RootedObject target(cx, GetProxyTargetObject(proxy));
// step c
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().keys, &trap))
return false;
// step d
if (trap.isUndefined())
return DirectProxyHandler::keys(cx, proxy, props);
// step e
Value argv[] = {
ObjectOrNullValue(target)
};
RootedValue trapResult(cx);
if (!Invoke(cx, ObjectValue(*handler), trap, 1, argv, trapResult.address()))
return false;
// step f
if (trapResult.isPrimitive()) {
JSAutoByteString bytes;
if (!js_AtomToPrintableString(cx, cx->names().keys, &bytes))
return false;
RootedValue v(cx, ObjectOrNullValue(proxy));
js_ReportValueError2(cx, JSMSG_INVALID_TRAP_RESULT, JSDVG_IGNORE_STACK,
v, NullPtr(), bytes.ptr());
return false;
}
// steps g-n are shared
return ArrayToIdVector(cx, proxy, target, trapResult, props, JSITER_OWNONLY, cx->names().keys);
}
bool
ScriptedDirectProxyHandler::iterate(JSContext *cx, HandleObject proxy, unsigned flags,
MutableHandleValue vp)
{
// FIXME: Provide a proper implementation for this trap, see bug 787004
return DirectProxyHandler::iterate(cx, proxy, flags, vp);
}
bool
ScriptedDirectProxyHandler::call(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
/*
* NB: Remember to throw a TypeError here if we change NewProxyObject so that this trap can get
* called for non-callable objects
*/
// step 3
RootedObject argsArray(cx, NewDenseCopiedArray(cx, args.length(), args.array()));
if (!argsArray)
return false;
// step 4
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().apply, &trap))
return false;
// step 5
if (trap.isUndefined())
return DirectProxyHandler::call(cx, proxy, args);
// step 6
Value argv[] = {
ObjectValue(*target),
args.thisv(),
ObjectValue(*argsArray)
};
RootedValue thisValue(cx, ObjectValue(*handler));
return Invoke(cx, thisValue, trap, ArrayLength(argv), argv, args.rval().address());
}
bool
ScriptedDirectProxyHandler::construct(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
// step 1
RootedObject handler(cx, GetDirectProxyHandlerObject(proxy));
// step 2
RootedObject target(cx, GetProxyTargetObject(proxy));
/*
* NB: Remember to throw a TypeError here if we change NewProxyObject so that this trap can get
* called for non-callable objects
*/
// step 3
RootedObject argsArray(cx, NewDenseCopiedArray(cx, args.length(), args.array()));
if (!argsArray)
return false;
// step 4
RootedValue trap(cx);
if (!JSObject::getProperty(cx, handler, handler, cx->names().construct, &trap))
return false;
// step 5
if (trap.isUndefined())
return DirectProxyHandler::construct(cx, proxy, args);
// step 6
Value constructArgv[] = {
ObjectValue(*target),
ObjectValue(*argsArray)
};
RootedValue thisValue(cx, ObjectValue(*handler));
return Invoke(cx, thisValue, trap, ArrayLength(constructArgv), constructArgv,
args.rval().address());
}
ScriptedDirectProxyHandler ScriptedDirectProxyHandler::singleton;
#define INVOKE_ON_PROTOTYPE(cx, handler, proxy, protoCall) \
JS_BEGIN_MACRO \
RootedObject proto(cx); \
if (!handler->getPrototypeOf(cx, proxy, &proto)) \
return false; \
if (!proto) \
return true; \
assertSameCompartment(cx, proxy, proto); \
return protoCall; \
JS_END_MACRO \
bool
Proxy::getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
desc->obj = NULL; // default result if we refuse to perform this action
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
if (!handler->hasPrototype())
return handler->getPropertyDescriptor(cx, proxy, id, desc, flags);
if (!handler->getOwnPropertyDescriptor(cx, proxy, id, desc, flags))
return false;
if (desc->obj)
return true;
INVOKE_ON_PROTOTYPE(cx, handler, proxy,
JS_GetPropertyDescriptorById(cx, proto, id, 0, desc));
}
bool
Proxy::getPropertyDescriptor(JSContext *cx, HandleObject proxy, unsigned flags,
HandleId id, MutableHandleValue vp)
{
JS_CHECK_RECURSION(cx, return false);
AutoPropertyDescriptorRooter desc(cx);
if (!Proxy::getPropertyDescriptor(cx, proxy, id, &desc, flags))
return false;
return NewPropertyDescriptorObject(cx, &desc, vp);
}
bool
Proxy::getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
PropertyDescriptor *desc, unsigned flags)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
desc->obj = NULL; // default result if we refuse to perform this action
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
return handler->getOwnPropertyDescriptor(cx, proxy, id, desc, flags);
}
bool
Proxy::getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, unsigned flags, HandleId id,
MutableHandleValue vp)
{
JS_CHECK_RECURSION(cx, return false);
AutoPropertyDescriptorRooter desc(cx);
if (!Proxy::getOwnPropertyDescriptor(cx, proxy, id, &desc, flags))
return false;
return NewPropertyDescriptorObject(cx, &desc, vp);
}
bool
Proxy::defineProperty(JSContext *cx, HandleObject proxy, HandleId id, PropertyDescriptor *desc)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::SET, true);
if (!policy.allowed())
return policy.returnValue();
return GetProxyHandler(proxy)->defineProperty(cx, proxy, id, desc);
}
bool
Proxy::defineProperty(JSContext *cx, HandleObject proxy, HandleId id, HandleValue v)
{
JS_CHECK_RECURSION(cx, return false);
AutoPropertyDescriptorRooter desc(cx);
return ParsePropertyDescriptorObject(cx, proxy, v, &desc) &&
Proxy::defineProperty(cx, proxy, id, &desc);
}
bool
Proxy::getOwnPropertyNames(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
return GetProxyHandler(proxy)->getOwnPropertyNames(cx, proxy, props);
}
bool
Proxy::delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
*bp = true; // default result if we refuse to perform this action
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::SET, true);
if (!policy.allowed())
return policy.returnValue();
return GetProxyHandler(proxy)->delete_(cx, proxy, id, bp);
}
JS_FRIEND_API(bool)
js::AppendUnique(JSContext *cx, AutoIdVector &base, AutoIdVector &others)
{
AutoIdVector uniqueOthers(cx);
if (!uniqueOthers.reserve(others.length()))
return false;
for (size_t i = 0; i < others.length(); ++i) {
bool unique = true;
for (size_t j = 0; j < base.length(); ++j) {
if (others[i] == base[j]) {
unique = false;
break;
}
}
if (unique)
uniqueOthers.append(others[i]);
}
return base.append(uniqueOthers);
}
bool
Proxy::enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
if (!handler->hasPrototype())
return GetProxyHandler(proxy)->enumerate(cx, proxy, props);
if (!handler->keys(cx, proxy, props))
return false;
AutoIdVector protoProps(cx);
INVOKE_ON_PROTOTYPE(cx, handler, proxy,
GetPropertyNames(cx, proto, 0, &protoProps) &&
AppendUnique(cx, props, protoProps));
}
bool
Proxy::has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
*bp = false; // default result if we refuse to perform this action
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
if (!handler->hasPrototype())
return handler->has(cx, proxy, id, bp);
if (!handler->hasOwn(cx, proxy, id, bp))
return false;
if (*bp)
return true;
JSBool Bp;
INVOKE_ON_PROTOTYPE(cx, handler, proxy,
JS_HasPropertyById(cx, proto, id, &Bp) &&
((*bp = Bp) || true));
}
bool
Proxy::hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
*bp = false; // default result if we refuse to perform this action
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
return handler->hasOwn(cx, proxy, id, bp);
}
bool
Proxy::get(JSContext *cx, HandleObject proxy, HandleObject receiver, HandleId id,
MutableHandleValue vp)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
vp.setUndefined(); // default result if we refuse to perform this action
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
bool own;
if (!handler->hasPrototype()) {
own = true;
} else {
if (!handler->hasOwn(cx, proxy, id, &own))
return false;
}
if (own)
return handler->get(cx, proxy, receiver, id, vp);
INVOKE_ON_PROTOTYPE(cx, handler, proxy, JSObject::getGeneric(cx, proto, receiver, id, vp));
}
bool
Proxy::getElementIfPresent(JSContext *cx, HandleObject proxy, HandleObject receiver, uint32_t index,
MutableHandleValue vp, bool *present)
{
JS_CHECK_RECURSION(cx, return false);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
if (!handler->hasPrototype()) {
return handler->getElementIfPresent(cx, proxy, receiver, index,
vp, present);
}
bool hasOwn;
if (!handler->hasOwn(cx, proxy, id, &hasOwn))
return false;
if (hasOwn) {
*present = true;
return GetProxyHandler(proxy)->get(cx, proxy, receiver, id, vp);
}
*present = false;
INVOKE_ON_PROTOTYPE(cx, handler, proxy,
JSObject::getElementIfPresent(cx, proto, receiver, index, vp, present));
}
bool
Proxy::set(JSContext *cx, HandleObject proxy, HandleObject receiver, HandleId id, bool strict,
MutableHandleValue vp)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, id, BaseProxyHandler::SET, true);
if (!policy.allowed())
return policy.returnValue();
if (handler->hasPrototype()) {
// If we're using a prototype, we still want to use the proxy trap unless
// we have a non-own property with a setter.
bool hasOwn;
if (!handler->hasOwn(cx, proxy, id, &hasOwn))
return false;
if (!hasOwn) {
RootedObject proto(cx);
if (!handler->getPrototypeOf(cx, proxy, &proto))
return false;
if (proto) {
AutoPropertyDescriptorRooter desc(cx);
if (!JS_GetPropertyDescriptorById(cx, proto, id, 0, &desc))
return false;
if (desc.obj && desc.setter)
return JSObject::setGeneric(cx, proto, receiver, id, vp, strict);
}
}
}
return handler->set(cx, proxy, receiver, id, strict, vp);
}
bool
Proxy::keys(JSContext *cx, HandleObject proxy, AutoIdVector &props)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
return handler->keys(cx, proxy, props);
}
bool
Proxy::iterate(JSContext *cx, HandleObject proxy, unsigned flags, MutableHandleValue vp)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
vp.setUndefined(); // default result if we refuse to perform this action
if (!handler->hasPrototype()) {
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE,
BaseProxyHandler::GET, true);
// If the policy denies access but wants us to return true, we need
// to hand a valid (empty) iterator object to the caller.
if (!policy.allowed()) {
AutoIdVector props(cx);
return policy.returnValue() &&
EnumeratedIdVectorToIterator(cx, proxy, flags, props, vp);
}
return handler->iterate(cx, proxy, flags, vp);
}
AutoIdVector props(cx);
// The other Proxy::foo methods do the prototype-aware work for us here.
if ((flags & JSITER_OWNONLY)
? !Proxy::keys(cx, proxy, props)
: !Proxy::enumerate(cx, proxy, props)) {
return false;
}
return EnumeratedIdVectorToIterator(cx, proxy, flags, props, vp);
}
bool
Proxy::isExtensible(JSObject *proxy)
{
return GetProxyHandler(proxy)->isExtensible(proxy);
}
bool
Proxy::preventExtensions(JSContext *cx, HandleObject proxy)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
return handler->preventExtensions(cx, proxy);
}
bool
Proxy::call(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
// Because vp[0] is JS_CALLEE on the way in and JS_RVAL on the way out, we
// can only set our default value once we're sure that we're not calling the
// trap.
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE,
BaseProxyHandler::CALL, true);
if (!policy.allowed()) {
args.rval().setUndefined();
return policy.returnValue();
}
return handler->call(cx, proxy, args);
}
bool
Proxy::construct(JSContext *cx, HandleObject proxy, const CallArgs &args)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
// Because vp[0] is JS_CALLEE on the way in and JS_RVAL on the way out, we
// can only set our default value once we're sure that we're not calling the
// trap.
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE,
BaseProxyHandler::CALL, true);
if (!policy.allowed()) {
args.rval().setUndefined();
return policy.returnValue();
}
return handler->construct(cx, proxy, args);
}
bool
Proxy::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl, CallArgs args)
{
JS_CHECK_RECURSION(cx, return false);
RootedObject proxy(cx, &args.thisv().toObject());
// Note - we don't enter a policy here because our security architecture
// guards against nativeCall by overriding the trap itself in the right
// circumstances.
return GetProxyHandler(proxy)->nativeCall(cx, test, impl, args);
}
bool
Proxy::hasInstance(JSContext *cx, HandleObject proxy, MutableHandleValue v, bool *bp)
{
JS_CHECK_RECURSION(cx, return false);
BaseProxyHandler *handler = GetProxyHandler(proxy);
*bp = false; // default result if we refuse to perform this action
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE, BaseProxyHandler::GET, true);
if (!policy.allowed())
return policy.returnValue();
return GetProxyHandler(proxy)->hasInstance(cx, proxy, v, bp);
}
bool
Proxy::objectClassIs(HandleObject proxy, ESClassValue classValue, JSContext *cx)
{
JS_CHECK_RECURSION(cx, return false);
return GetProxyHandler(proxy)->objectClassIs(proxy, classValue, cx);
}
const char *
Proxy::className(JSContext *cx, HandleObject proxy)
{
// Check for unbounded recursion, but don't signal an error; className
// needs to be infallible.
int stackDummy;
if (!JS_CHECK_STACK_SIZE(cx->mainThread().nativeStackLimit, &stackDummy))
return "too much recursion";
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE,
BaseProxyHandler::GET, /* mayThrow = */ false);
// Do the safe thing if the policy rejects.
if (!policy.allowed()) {
return handler->BaseProxyHandler::className(cx, proxy);
}
return handler->className(cx, proxy);
}
JSString *
Proxy::fun_toString(JSContext *cx, HandleObject proxy, unsigned indent)
{
JS_CHECK_RECURSION(cx, return NULL);
BaseProxyHandler *handler = GetProxyHandler(proxy);
AutoEnterPolicy policy(cx, handler, proxy, JS::JSID_VOIDHANDLE,
BaseProxyHandler::GET, /* mayThrow = */ false);
// Do the safe thing if the policy rejects.
if (!policy.allowed()) {
if (proxy->isCallable())
return JS_NewStringCopyZ(cx, "function () {\n [native code]\n}");
ReportIsNotFunction(cx, ObjectValue(*proxy));
return NULL;
}
return handler->fun_toString(cx, proxy, indent);
}
bool
Proxy::regexp_toShared(JSContext *cx, HandleObject proxy, RegExpGuard *g)
{
JS_CHECK_RECURSION(cx, return false);
return GetProxyHandler(proxy)->regexp_toShared(cx, proxy, g);
}
bool
Proxy::defaultValue(JSContext *cx, HandleObject proxy, JSType hint, MutableHandleValue vp)
{