static MOZ_ALWAYS_INLINE bool
SetWeakMapEntryInternal(JSContext* cx, Handle<WeakMapObject*> mapObj,
HandleObject key, HandleValue value)
{
ObjectValueMap* map = mapObj->getMap();
if (!map) {
auto newMap = cx->make_unique<ObjectValueMap>(cx, mapObj.get());
if (!newMap)
return false;
if (!newMap->init()) {
JS_ReportOutOfMemory(cx);
return false;
}
map = newMap.release();
mapObj->setPrivate(map);
}
// Preserve wrapped native keys to prevent wrapper optimization.
if (!TryPreserveReflector(cx, key))
return false;
if (JSWeakmapKeyDelegateOp op = key->getClass()->extWeakmapKeyDelegateOp()) {
RootedObject delegate(cx, op(key));
if (delegate && !TryPreserveReflector(cx, delegate))
return false;
}
MOZ_ASSERT(key->compartment() == mapObj->compartment());
MOZ_ASSERT_IF(value.isObject(), value.toObject().compartment() == mapObj->compartment());
if (!map->put(key, value)) {
JS_ReportOutOfMemory(cx);
return false;
}
return true;
}
static bool
WrapForSameCompartment(JSContext *cx, HandleObject obj, MutableHandleValue vp)
{
JS_ASSERT(cx->compartment == obj->compartment());
if (!cx->runtime->sameCompartmentWrapObjectCallback) {
vp.setObject(*obj);
return true;
}
JSObject *wrapped = cx->runtime->sameCompartmentWrapObjectCallback(cx, obj);
if (!wrapped)
return false;
vp.setObject(*wrapped);
return true;
}
bool
JSCompartment::rewrap(JSContext* cx, MutableHandleObject obj, HandleObject existingArg)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(this));
MOZ_ASSERT(cx->compartment() == this);
MOZ_ASSERT(obj);
MOZ_ASSERT(existingArg);
MOZ_ASSERT(existingArg->compartment() == cx->compartment());
MOZ_ASSERT(IsDeadProxyObject(existingArg));
AutoDisableProxyCheck adpc(cx->runtime());
// It may not be possible to re-use existing; if so, clear it so that we
// are forced to create a new wrapper. Note that this cannot call out to
// |wrap| because of the different gray unmarking semantics.
RootedObject existing(cx, existingArg);
if (existing->hasStaticPrototype() ||
// Note: Class asserted above, so all that's left to check is callability
existing->isCallable() ||
obj->isCallable())
{
existing.set(nullptr);
}
// The passed object may already be wrapped, or may fit a number of special
// cases that we need to check for and manually correct.
if (!getNonWrapperObjectForCurrentCompartment(cx, obj))
return false;
// If the reification above resulted in a same-compartment object, we do
// not need to create or return an existing wrapper.
if (obj->compartment() == this)
return true;
return getOrCreateWrapper(cx, existing, obj);
}
MOZ_ALWAYS_INLINE bool
SetWeakMapEntryInternal(JSContext *cx, Handle<WeakMapObject*> mapObj,
HandleObject key, HandleValue value)
{
ObjectValueMap *map = mapObj->getMap();
if (!map) {
map = cx->new_<ObjectValueMap>(cx, mapObj.get());
if (!map)
return false;
if (!map->init()) {
js_delete(map);
JS_ReportOutOfMemory(cx);
return false;
}
mapObj->setPrivate(map);
}
// Preserve wrapped native keys to prevent wrapper optimization.
if (!TryPreserveReflector(cx, key))
return false;
if (JSWeakmapKeyDelegateOp op = key->getClass()->ext.weakmapKeyDelegateOp) {
RootedObject delegate(cx, op(key));
if (delegate && !TryPreserveReflector(cx, delegate))
return false;
}
JS_ASSERT(key->compartment() == mapObj->compartment());
JS_ASSERT_IF(value.isObject(), value.toObject().compartment() == mapObj->compartment());
if (!map->put(key, value)) {
JS_ReportOutOfMemory(cx);
return false;
}
WeakMapPostWriteBarrier(cx->runtime(), map, key.get());
return true;
}
bool
JSCompartment::wrap(JSContext *cx, MutableHandleValue vp, HandleObject existingArg)
{
JS_ASSERT(cx->compartment == this);
JS_ASSERT_IF(existingArg, existingArg->compartment() == cx->compartment);
JS_ASSERT_IF(existingArg, vp.isObject());
JS_ASSERT_IF(existingArg, IsDeadProxyObject(existingArg));
unsigned flags = 0;
JS_CHECK_CHROME_RECURSION(cx, return false);
#ifdef DEBUG
struct AutoDisableProxyCheck {
JSRuntime *runtime;
AutoDisableProxyCheck(JSRuntime *rt) : runtime(rt) {
runtime->gcDisableStrictProxyCheckingCount++;
}
~AutoDisableProxyCheck() { runtime->gcDisableStrictProxyCheckingCount--; }
} adpc(rt);
#endif
/* Only GC things have to be wrapped or copied. */
if (!vp.isMarkable())
return true;
if (vp.isString()) {
RawString str = vp.toString();
/* If the string is already in this compartment, we are done. */
if (str->zone() == zone())
return true;
/* If the string is an atom, we don't have to copy. */
if (str->isAtom()) {
JS_ASSERT(str->zone() == cx->runtime->atomsCompartment->zone());
return true;
}
}
/*
* Wrappers should really be parented to the wrapped parent of the wrapped
* object, but in that case a wrapped global object would have a NULL
* parent without being a proper global object (JSCLASS_IS_GLOBAL). Instead,
* we parent all wrappers to the global object in their home compartment.
* This loses us some transparency, and is generally very cheesy.
*/
HandleObject global = cx->global();
/* Unwrap incoming objects. */
if (vp.isObject()) {
RootedObject obj(cx, &vp.toObject());
if (obj->compartment() == this)
return WrapForSameCompartment(cx, obj, vp);
/* Translate StopIteration singleton. */
if (obj->isStopIteration())
return js_FindClassObject(cx, JSProto_StopIteration, vp);
/* Unwrap the object, but don't unwrap outer windows. */
obj = UnwrapObject(obj, /* stopAtOuter = */ true, &flags);
if (obj->compartment() == this)
return WrapForSameCompartment(cx, obj, vp);
if (cx->runtime->preWrapObjectCallback) {
obj = cx->runtime->preWrapObjectCallback(cx, global, obj, flags);
if (!obj)
return false;
}
if (obj->compartment() == this)
return WrapForSameCompartment(cx, obj, vp);
vp.setObject(*obj);
#ifdef DEBUG
{
JSObject *outer = GetOuterObject(cx, obj);
JS_ASSERT(outer && outer == obj);
}
#endif
}
RootedValue key(cx, vp);
/* If we already have a wrapper for this value, use it. */
if (WrapperMap::Ptr p = crossCompartmentWrappers.lookup(key)) {
vp.set(p->value);
if (vp.isObject()) {
RawObject obj = &vp.toObject();
JS_ASSERT(obj->isCrossCompartmentWrapper());
JS_ASSERT(obj->getParent() == global);
}
return true;
}
if (vp.isString()) {
Rooted<JSLinearString *> str(cx, vp.toString()->ensureLinear(cx));
if (!str)
return false;
UnrootedString wrapped = js_NewStringCopyN<CanGC>(cx, str->chars(), str->length());
if (!wrapped)
return false;
vp.setString(wrapped);
if (!putWrapper(key, vp))
return false;
if (str->zone()->isGCMarking()) {
/*
* All string wrappers are dropped when collection starts, but we
* just created a new one. Mark the wrapped string to stop it being
* finalized, because if it was then the pointer in this
* compartment's wrapper map would be left dangling.
*/
JSString *tmp = str;
MarkStringUnbarriered(&rt->gcMarker, &tmp, "wrapped string");
JS_ASSERT(tmp == str);
}
return true;
}
RootedObject proto(cx, Proxy::LazyProto);
RootedObject obj(cx, &vp.toObject());
RootedObject existing(cx, existingArg);
if (existing) {
/* Is it possible to reuse |existing|? */
if (!existing->getTaggedProto().isLazy() ||
existing->getClass() != &ObjectProxyClass ||
existing->getParent() != global ||
obj->isCallable())
{
existing = NULL;
}
}
/*
* We hand in the original wrapped object into the wrap hook to allow
* the wrap hook to reason over what wrappers are currently applied
* to the object.
*/
RootedObject wrapper(cx);
wrapper = cx->runtime->wrapObjectCallback(cx, existing, obj, proto, global, flags);
if (!wrapper)
return false;
// We maintain the invariant that the key in the cross-compartment wrapper
// map is always directly wrapped by the value.
JS_ASSERT(Wrapper::wrappedObject(wrapper) == &key.get().toObject());
vp.setObject(*wrapper);
return putWrapper(key, vp);
}
bool
JSCompartment::wrap(JSContext *cx, MutableHandleObject obj, HandleObject existingArg)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(this));
MOZ_ASSERT(cx->compartment() == this);
MOZ_ASSERT_IF(existingArg, existingArg->compartment() == cx->compartment());
MOZ_ASSERT_IF(existingArg, IsDeadProxyObject(existingArg));
if (!obj)
return true;
AutoDisableProxyCheck adpc(cx->runtime());
// Wrappers should really be parented to the wrapped parent of the wrapped
// object, but in that case a wrapped global object would have a nullptr
// parent without being a proper global object (JSCLASS_IS_GLOBAL). Instead,
// we parent all wrappers to the global object in their home compartment.
// This loses us some transparency, and is generally very cheesy.
HandleObject global = cx->global();
RootedObject objGlobal(cx, &obj->global());
MOZ_ASSERT(global);
MOZ_ASSERT(objGlobal);
const JSWrapObjectCallbacks *cb = cx->runtime()->wrapObjectCallbacks;
if (obj->compartment() == this) {
obj.set(GetOuterObject(cx, obj));
return true;
}
// If we have a cross-compartment wrapper, make sure that the cx isn't
// associated with the self-hosting global. We don't want to create
// wrappers for objects in other runtimes, which may be the case for the
// self-hosting global.
MOZ_ASSERT(!cx->runtime()->isSelfHostingGlobal(global) &&
!cx->runtime()->isSelfHostingGlobal(objGlobal));
// Unwrap the object, but don't unwrap outer windows.
RootedObject objectPassedToWrap(cx, obj);
obj.set(UncheckedUnwrap(obj, /* stopAtOuter = */ true));
if (obj->compartment() == this) {
MOZ_ASSERT(obj == GetOuterObject(cx, obj));
return true;
}
// Translate StopIteration singleton.
if (obj->is<StopIterationObject>()) {
// StopIteration isn't a constructor, but it's stored in GlobalObject
// as one, out of laziness. Hence the GetBuiltinConstructor call here.
RootedObject stopIteration(cx);
if (!GetBuiltinConstructor(cx, JSProto_StopIteration, &stopIteration))
return false;
obj.set(stopIteration);
return true;
}
// Invoke the prewrap callback. We're a bit worried about infinite
// recursion here, so we do a check - see bug 809295.
JS_CHECK_SYSTEM_RECURSION(cx, return false);
if (cb->preWrap) {
obj.set(cb->preWrap(cx, global, obj, objectPassedToWrap));
if (!obj)
return false;
}
MOZ_ASSERT(obj == GetOuterObject(cx, obj));
if (obj->compartment() == this)
return true;
// If we already have a wrapper for this value, use it.
RootedValue key(cx, ObjectValue(*obj));
if (WrapperMap::Ptr p = crossCompartmentWrappers.lookup(CrossCompartmentKey(key))) {
obj.set(&p->value().get().toObject());
MOZ_ASSERT(obj->is<CrossCompartmentWrapperObject>());
MOZ_ASSERT(obj->getParent() == global);
return true;
}
RootedObject existing(cx, existingArg);
if (existing) {
// Is it possible to reuse |existing|?
if (!existing->getTaggedProto().isLazy() ||
// Note: Class asserted above, so all that's left to check is callability
existing->isCallable() ||
existing->getParent() != global ||
obj->isCallable())
{
existing = nullptr;
}
}
obj.set(cb->wrap(cx, existing, obj, global));
if (!obj)
return false;
// We maintain the invariant that the key in the cross-compartment wrapper
// map is always directly wrapped by the value.
MOZ_ASSERT(Wrapper::wrappedObject(obj) == &key.get().toObject());
return putWrapper(cx, CrossCompartmentKey(key), ObjectValue(*obj));
}
bool
JSCompartment::wrap(JSContext *cx, MutableHandleObject obj, HandleObject existingArg)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(this));
JS_ASSERT(cx->compartment() == this);
JS_ASSERT_IF(existingArg, existingArg->compartment() == cx->compartment());
JS_ASSERT_IF(existingArg, IsDeadProxyObject(existingArg));
if (!obj)
return true;
AutoDisableProxyCheck adpc(cx->runtime());
/*
* Wrappers should really be parented to the wrapped parent of the wrapped
* object, but in that case a wrapped global object would have a nullptr
* parent without being a proper global object (JSCLASS_IS_GLOBAL). Instead,
* we parent all wrappers to the global object in their home compartment.
* This loses us some transparency, and is generally very cheesy.
*/
HandleObject global = cx->global();
RootedObject objGlobal(cx, &obj->global());
JS_ASSERT(global);
JS_ASSERT(objGlobal);
const JSWrapObjectCallbacks *cb;
if (cx->runtime()->isSelfHostingGlobal(global) || cx->runtime()->isSelfHostingGlobal(objGlobal))
cb = &SelfHostingWrapObjectCallbacks;
else
cb = cx->runtime()->wrapObjectCallbacks;
if (obj->compartment() == this)
return WrapForSameCompartment(cx, obj, cb);
/* Unwrap the object, but don't unwrap outer windows. */
unsigned flags = 0;
obj.set(UncheckedUnwrap(obj, /* stopAtOuter = */ true, &flags));
if (obj->compartment() == this)
return WrapForSameCompartment(cx, obj, cb);
/* Translate StopIteration singleton. */
if (obj->is<StopIterationObject>()) {
RootedValue v(cx);
if (!js_FindClassObject(cx, JSProto_StopIteration, &v))
return false;
obj.set(&v.toObject());
return true;
}
/* Invoke the prewrap callback. We're a bit worried about infinite
* recursion here, so we do a check - see bug 809295. */
JS_CHECK_CHROME_RECURSION(cx, return false);
if (cb->preWrap) {
obj.set(cb->preWrap(cx, global, obj, flags));
if (!obj)
return false;
}
if (obj->compartment() == this)
return WrapForSameCompartment(cx, obj, cb);
#ifdef DEBUG
{
JSObject *outer = GetOuterObject(cx, obj);
JS_ASSERT(outer && outer == obj);
}
#endif
/* If we already have a wrapper for this value, use it. */
RootedValue key(cx, ObjectValue(*obj));
if (WrapperMap::Ptr p = crossCompartmentWrappers.lookup(key)) {
obj.set(&p->value().get().toObject());
JS_ASSERT(obj->is<CrossCompartmentWrapperObject>());
JS_ASSERT(obj->getParent() == global);
return true;
}
RootedObject proto(cx, TaggedProto::LazyProto);
RootedObject existing(cx, existingArg);
if (existing) {
/* Is it possible to reuse |existing|? */
if (!existing->getTaggedProto().isLazy() ||
// Note: don't use is<ObjectProxyObject>() here -- it also matches subclasses!
existing->getClass() != &ProxyObject::uncallableClass_ ||
existing->getParent() != global ||
obj->isCallable())
{
existing = nullptr;
}
}
obj.set(cb->wrap(cx, existing, obj, proto, global, flags));
if (!obj)
return false;
/*
* We maintain the invariant that the key in the cross-compartment wrapper
* map is always directly wrapped by the value.
*/
JS_ASSERT(Wrapper::wrappedObject(obj) == &key.get().toObject());
return putWrapper(key, ObjectValue(*obj));
}
