michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=4 sw=4 et tw=80:
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "JavaScriptParent.h"
michael@0: #include "mozilla/dom/ContentParent.h"
michael@0: #include "nsJSUtils.h"
michael@0: #include "jsfriendapi.h"
michael@0: #include "jsproxy.h"
michael@0: #include "jswrapper.h"
michael@0: #include "HeapAPI.h"
michael@0: #include "xpcprivate.h"
michael@0: #include "mozilla/Casting.h"
michael@0: 
michael@0: using namespace js;
michael@0: using namespace JS;
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::jsipc;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: JavaScriptParent::JavaScriptParent()
michael@0:   : refcount_(1),
michael@0:     inactive_(false)
michael@0: {
michael@0: }
michael@0: 
michael@0: static inline JavaScriptParent *
michael@0: ParentOf(JSObject *obj)
michael@0: {
michael@0:     MOZ_ASSERT(JavaScriptParent::IsCPOW(obj));
michael@0:     return reinterpret_cast<JavaScriptParent *>(GetProxyExtra(obj, 0).toPrivate());
michael@0: }
michael@0: 
michael@0: ObjectId
michael@0: JavaScriptParent::idOf(JSObject *obj)
michael@0: {
michael@0:     MOZ_ASSERT(JavaScriptParent::IsCPOW(obj));
michael@0: 
michael@0:     Value v = GetProxyExtra(obj, 1);
michael@0:     MOZ_ASSERT(v.isDouble());
michael@0: 
michael@0:     ObjectId objId = BitwiseCast<uint64_t>(v.toDouble());
michael@0:     MOZ_ASSERT(findObject(objId) == obj);
michael@0:     MOZ_ASSERT(objId);
michael@0: 
michael@0:     return objId;
michael@0: }
michael@0: 
michael@0: int sCPOWProxyHandler;
michael@0: 
michael@0: class CPOWProxyHandler : public BaseProxyHandler
michael@0: {
michael@0:   public:
michael@0:     CPOWProxyHandler()
michael@0:       : BaseProxyHandler(&sCPOWProxyHandler) {}
michael@0:     virtual ~CPOWProxyHandler() {}
michael@0: 
michael@0:     virtual bool finalizeInBackground(Value priv) MOZ_OVERRIDE {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     virtual bool preventExtensions(JSContext *cx, HandleObject proxy) MOZ_OVERRIDE;
michael@0:     virtual bool getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                        MutableHandle<JSPropertyDescriptor> desc) MOZ_OVERRIDE;
michael@0:     virtual bool getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                           MutableHandle<JSPropertyDescriptor> desc) MOZ_OVERRIDE;
michael@0:     virtual bool defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                 MutableHandle<JSPropertyDescriptor> desc) MOZ_OVERRIDE;
michael@0:     virtual bool getOwnPropertyNames(JSContext *cx, HandleObject proxy,
michael@0:                                      AutoIdVector &props) MOZ_OVERRIDE;
michael@0:     virtual bool delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
michael@0:     virtual bool enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props) MOZ_OVERRIDE;
michael@0: 
michael@0:     virtual bool has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
michael@0:     virtual bool hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp) MOZ_OVERRIDE;
michael@0:     virtual bool get(JSContext *cx, HandleObject proxy, HandleObject receiver,
michael@0:                      HandleId id, MutableHandleValue vp) MOZ_OVERRIDE;
michael@0:     virtual bool set(JSContext *cx, JS::HandleObject proxy, JS::HandleObject receiver,
michael@0:                      JS::HandleId id, bool strict, JS::MutableHandleValue vp) MOZ_OVERRIDE;
michael@0:     virtual bool keys(JSContext *cx, HandleObject proxy, AutoIdVector &props) MOZ_OVERRIDE;
michael@0: 
michael@0:     virtual bool isExtensible(JSContext *cx, HandleObject proxy, bool *extensible) MOZ_OVERRIDE;
michael@0:     virtual bool call(JSContext *cx, HandleObject proxy, const CallArgs &args) MOZ_OVERRIDE;
michael@0:     virtual bool objectClassIs(HandleObject obj, js::ESClassValue classValue, JSContext *cx) MOZ_OVERRIDE;
michael@0:     virtual const char* className(JSContext *cx, HandleObject proxy) MOZ_OVERRIDE;
michael@0:     virtual void finalize(JSFreeOp *fop, JSObject *proxy) MOZ_OVERRIDE;
michael@0: 
michael@0:     static CPOWProxyHandler singleton;
michael@0: };
michael@0: 
michael@0: CPOWProxyHandler CPOWProxyHandler::singleton;
michael@0: 
michael@0: #define FORWARD(call, args)                                             \
michael@0:     JavaScriptParent *parent = ParentOf(proxy);                         \
michael@0:     if (!parent->active()) {                                            \
michael@0:         JS_ReportError(cx, "cannot use a CPOW whose process is gone");  \
michael@0:         return false;                                                   \
michael@0:     }                                                                   \
michael@0:     return parent->call args;
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::preventExtensions(JSContext *cx, HandleObject proxy)
michael@0: {
michael@0:     FORWARD(preventExtensions, (cx, proxy));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::preventExtensions(JSContext *cx, HandleObject proxy)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallPreventExtensions(objId, &status))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     return ok(cx, status);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                         MutableHandle<JSPropertyDescriptor> desc)
michael@0: {
michael@0:     FORWARD(getPropertyDescriptor, (cx, proxy, id, desc));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::getPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                         MutableHandle<JSPropertyDescriptor> desc)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     PPropertyDescriptor result;
michael@0:     if (!CallGetPropertyDescriptor(objId, idstr, &status, &result))
michael@0:         return ipcfail(cx);
michael@0:     if (!ok(cx, status))
michael@0:         return false;
michael@0: 
michael@0:     return toDescriptor(cx, result, desc);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy,
michael@0:                                            HandleId id, MutableHandle<JSPropertyDescriptor> desc)
michael@0: {
michael@0:     FORWARD(getOwnPropertyDescriptor, (cx, proxy, id, desc));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::getOwnPropertyDescriptor(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                            MutableHandle<JSPropertyDescriptor> desc)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     PPropertyDescriptor result;
michael@0:     if (!CallGetOwnPropertyDescriptor(objId, idstr, &status, &result))
michael@0:         return ipcfail(cx);
michael@0:     if (!ok(cx, status))
michael@0:         return false;
michael@0: 
michael@0:     return toDescriptor(cx, result, desc);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                  MutableHandle<JSPropertyDescriptor> desc)
michael@0: {
michael@0:     FORWARD(defineProperty, (cx, proxy, id, desc));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::defineProperty(JSContext *cx, HandleObject proxy, HandleId id,
michael@0:                                  MutableHandle<JSPropertyDescriptor> desc)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     PPropertyDescriptor descriptor;
michael@0:     if (!fromDescriptor(cx, desc, &descriptor))
michael@0:         return false;
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallDefineProperty(objId, idstr, descriptor, &status))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     return ok(cx, status);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::getOwnPropertyNames(JSContext *cx, HandleObject proxy, AutoIdVector &props)
michael@0: {
michael@0:     FORWARD(getOwnPropertyNames, (cx, proxy, props));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::getOwnPropertyNames(JSContext *cx, HandleObject proxy, AutoIdVector &props)
michael@0: {
michael@0:     return getPropertyNames(cx, proxy, JSITER_OWNONLY | JSITER_HIDDEN, props);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
michael@0: {
michael@0:     FORWARD(delete_, (cx, proxy, id, bp));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::delete_(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallDelete(objId, idstr, &status, bp))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     return ok(cx, status);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props)
michael@0: {
michael@0:     FORWARD(enumerate, (cx, proxy, props));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::enumerate(JSContext *cx, HandleObject proxy, AutoIdVector &props)
michael@0: {
michael@0:     return getPropertyNames(cx, proxy, 0, props);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
michael@0: {
michael@0:     FORWARD(has, (cx, proxy, id, bp));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::has(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallHas(objId, idstr, &status, bp))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     return ok(cx, status);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
michael@0: {
michael@0:     FORWARD(hasOwn, (cx, proxy, id, bp));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::hasOwn(JSContext *cx, HandleObject proxy, HandleId id, bool *bp)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallHasOwn(objId, idstr, &status, bp))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     return !!ok(cx, status);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::get(JSContext *cx, HandleObject proxy, HandleObject receiver,
michael@0:                       HandleId id, MutableHandleValue vp)
michael@0: {
michael@0:     FORWARD(get, (cx, proxy, receiver, id, vp));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::get(JSContext *cx, HandleObject proxy, HandleObject receiver,
michael@0:                       HandleId id, MutableHandleValue vp)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0:     ObjectId receiverId = idOf(receiver);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     JSVariant val;
michael@0:     ReturnStatus status;
michael@0:     if (!CallGet(objId, receiverId, idstr, &status, &val))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     if (!ok(cx, status))
michael@0:         return false;
michael@0: 
michael@0:     return toValue(cx, val, vp);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::set(JSContext *cx, JS::HandleObject proxy, JS::HandleObject receiver,
michael@0:                       JS::HandleId id, bool strict, JS::MutableHandleValue vp)
michael@0: {
michael@0:     FORWARD(set, (cx, proxy, receiver, id, strict, vp));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::set(JSContext *cx, JS::HandleObject proxy, JS::HandleObject receiver,
michael@0:                       JS::HandleId id, bool strict, JS::MutableHandleValue vp)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0:     ObjectId receiverId = idOf(receiver);
michael@0: 
michael@0:     nsString idstr;
michael@0:     if (!convertIdToGeckoString(cx, id, &idstr))
michael@0:         return false;
michael@0: 
michael@0:     JSVariant val;
michael@0:     if (!toVariant(cx, vp, &val))
michael@0:         return false;
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     JSVariant result;
michael@0:     if (!CallSet(objId, receiverId, idstr, strict, val, &status, &result))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     if (!ok(cx, status))
michael@0:         return false;
michael@0: 
michael@0:     return toValue(cx, result, vp);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::keys(JSContext *cx, HandleObject proxy, AutoIdVector &props)
michael@0: {
michael@0:     FORWARD(keys, (cx, proxy, props));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::keys(JSContext *cx, HandleObject proxy, AutoIdVector &props)
michael@0: {
michael@0:     return getPropertyNames(cx, proxy, JSITER_OWNONLY, props);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::isExtensible(JSContext *cx, HandleObject proxy, bool *extensible)
michael@0: {
michael@0:     FORWARD(isExtensible, (cx, proxy, extensible));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::isExtensible(JSContext *cx, HandleObject proxy, bool *extensible)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallIsExtensible(objId, &status, extensible))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     return ok(cx, status);
michael@0: }
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::call(JSContext *cx, HandleObject proxy, const CallArgs &args)
michael@0: {
michael@0:     FORWARD(call, (cx, proxy, args));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::call(JSContext *cx, HandleObject proxy, const CallArgs &args)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     InfallibleTArray<JSParam> vals;
michael@0:     AutoValueVector outobjects(cx);
michael@0: 
michael@0:     RootedValue v(cx);
michael@0:     for (size_t i = 0; i < args.length() + 2; i++) {
michael@0:         v = args.base()[i];
michael@0:         if (v.isObject()) {
michael@0:             RootedObject obj(cx, &v.toObject());
michael@0:             if (xpc::IsOutObject(cx, obj)) {
michael@0:                 // Make sure it is not an in-out object.
michael@0:                 bool found;
michael@0:                 if (!JS_HasProperty(cx, obj, "value", &found))
michael@0:                     return false;
michael@0:                 if (found) {
michael@0:                     JS_ReportError(cx, "in-out objects cannot be sent via CPOWs yet");
michael@0:                     return false;
michael@0:                 }
michael@0: 
michael@0:                 vals.AppendElement(JSParam(void_t()));
michael@0:                 if (!outobjects.append(ObjectValue(*obj)))
michael@0:                     return false;
michael@0:                 continue;
michael@0:             }
michael@0:         }
michael@0:         JSVariant val;
michael@0:         if (!toVariant(cx, v, &val))
michael@0:             return false;
michael@0:         vals.AppendElement(JSParam(val));
michael@0:     }
michael@0: 
michael@0:     JSVariant result;
michael@0:     ReturnStatus status;
michael@0:     InfallibleTArray<JSParam> outparams;
michael@0:     if (!CallCall(objId, vals, &status, &result, &outparams))
michael@0:         return ipcfail(cx);
michael@0:     if (!ok(cx, status))
michael@0:         return false;
michael@0: 
michael@0:     if (outparams.Length() != outobjects.length())
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     RootedObject obj(cx);
michael@0:     for (size_t i = 0; i < outparams.Length(); i++) {
michael@0:         // Don't bother doing anything for outparams that weren't set.
michael@0:         if (outparams[i].type() == JSParam::Tvoid_t)
michael@0:             continue;
michael@0: 
michael@0:         // Take the value the child process returned, and set it on the XPC
michael@0:         // object.
michael@0:         if (!toValue(cx, outparams[i], &v))
michael@0:             return false;
michael@0: 
michael@0:         obj = &outobjects[i].toObject();
michael@0:         if (!JS_SetProperty(cx, obj, "value", v))
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     if (!toValue(cx, result, args.rval()))
michael@0:         return false;
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: 
michael@0: bool
michael@0: CPOWProxyHandler::objectClassIs(HandleObject proxy, js::ESClassValue classValue, JSContext *cx)
michael@0: {
michael@0:     FORWARD(objectClassIs, (cx, proxy, classValue));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::objectClassIs(JSContext *cx, HandleObject proxy, js::ESClassValue classValue)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     // This function is assumed infallible, so we just return false if the IPC
michael@0:     // channel fails.
michael@0:     bool result;
michael@0:     if (!CallObjectClassIs(objId, classValue, &result))
michael@0:         return false;
michael@0: 
michael@0:     return result;
michael@0: }
michael@0: 
michael@0: const char *
michael@0: CPOWProxyHandler::className(JSContext *cx, HandleObject proxy)
michael@0: {
michael@0:     JavaScriptParent *parent = ParentOf(proxy);
michael@0:     if (!parent->active())
michael@0:         return "<dead CPOW>";
michael@0:     return parent->className(cx, proxy);
michael@0: }
michael@0: 
michael@0: const char *
michael@0: JavaScriptParent::className(JSContext *cx, HandleObject proxy)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     nsString name;
michael@0:     if (!CallClassName(objId, &name))
michael@0:         return "<error>";
michael@0: 
michael@0:     return ToNewCString(name);
michael@0: }
michael@0: 
michael@0: void
michael@0: CPOWProxyHandler::finalize(JSFreeOp *fop, JSObject *proxy)
michael@0: {
michael@0:     ParentOf(proxy)->drop(proxy);
michael@0: }
michael@0: 
michael@0: void
michael@0: JavaScriptParent::drop(JSObject *obj)
michael@0: {
michael@0:     ObjectId objId = idOf(obj);
michael@0: 
michael@0:     objects_.remove(objId);
michael@0:     if (!inactive_ && !SendDropObject(objId))
michael@0:         (void)0;
michael@0:     decref();
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::init()
michael@0: {
michael@0:     if (!JavaScriptShared::init())
michael@0:         return false;
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::makeId(JSContext *cx, JSObject *obj, ObjectId *idp)
michael@0: {
michael@0:     obj = js::CheckedUnwrap(obj, false);
michael@0:     if (!obj || !IsProxy(obj) || GetProxyHandler(obj) != &CPOWProxyHandler::singleton) {
michael@0:         JS_ReportError(cx, "cannot ipc non-cpow object");
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     *idp = idOf(obj);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::getPropertyNames(JSContext *cx, HandleObject proxy, uint32_t flags, AutoIdVector &props)
michael@0: {
michael@0:     ObjectId objId = idOf(proxy);
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     InfallibleTArray<nsString> names;
michael@0:     if (!CallGetPropertyNames(objId, flags, &status, &names))
michael@0:         return ipcfail(cx);
michael@0:     if (!ok(cx, status))
michael@0:         return false;
michael@0: 
michael@0:     for (size_t i = 0; i < names.Length(); i++) {
michael@0:         RootedId name(cx);
michael@0:         if (!convertGeckoStringToId(cx, names[i], &name))
michael@0:             return false;
michael@0:         if (!props.append(name))
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: JSObject *
michael@0: JavaScriptParent::unwrap(JSContext *cx, ObjectId objId)
michael@0: {
michael@0:     RootedObject obj(cx, findObject(objId));
michael@0:     if (obj) {
michael@0:         if (!JS_WrapObject(cx, &obj))
michael@0:             return nullptr;
michael@0:         return obj;
michael@0:     }
michael@0: 
michael@0:     if (objId > MAX_CPOW_IDS) {
michael@0:         JS_ReportError(cx, "unusable CPOW id");
michael@0:         return nullptr;
michael@0:     }
michael@0: 
michael@0:     bool callable = !!(objId & OBJECT_IS_CALLABLE);
michael@0: 
michael@0:     RootedObject global(cx, JS::CurrentGlobalOrNull(cx));
michael@0: 
michael@0:     RootedValue v(cx, UndefinedValue());
michael@0:     ProxyOptions options;
michael@0:     options.selectDefaultClass(callable);
michael@0:     obj = NewProxyObject(cx,
michael@0:                          &CPOWProxyHandler::singleton,
michael@0:                          v,
michael@0:                          nullptr,
michael@0:                          global,
michael@0:                          options);
michael@0:     if (!obj)
michael@0:         return nullptr;
michael@0: 
michael@0:     if (!objects_.add(objId, obj))
michael@0:         return nullptr;
michael@0: 
michael@0:     // Incref once we know the decref will be called.
michael@0:     incref();
michael@0: 
michael@0:     SetProxyExtra(obj, 0, PrivateValue(this));
michael@0:     SetProxyExtra(obj, 1, DoubleValue(BitwiseCast<double>(objId)));
michael@0:     return obj;
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::ipcfail(JSContext *cx)
michael@0: {
michael@0:     JS_ReportError(cx, "child process crashed or timedout");
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::ok(JSContext *cx, const ReturnStatus &status)
michael@0: {
michael@0:     if (status.type() == ReturnStatus::TReturnSuccess)
michael@0:         return true;
michael@0: 
michael@0:     if (status.type() == ReturnStatus::TReturnStopIteration)
michael@0:         return JS_ThrowStopIteration(cx);
michael@0: 
michael@0:     RootedValue exn(cx);
michael@0:     if (!toValue(cx, status.get_ReturnException().exn(), &exn))
michael@0:         return false;
michael@0: 
michael@0:     JS_SetPendingException(cx, exn);
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: void
michael@0: JavaScriptParent::decref()
michael@0: {
michael@0:     refcount_--;
michael@0:     if (!refcount_)
michael@0:         delete this;
michael@0: }
michael@0: 
michael@0: void
michael@0: JavaScriptParent::incref()
michael@0: {
michael@0:     refcount_++;
michael@0: }
michael@0: 
michael@0: void
michael@0: JavaScriptParent::ActorDestroy(ActorDestroyReason why)
michael@0: {
michael@0:     inactive_ = true;
michael@0: }
michael@0: 
michael@0: /* static */ bool
michael@0: JavaScriptParent::IsCPOW(JSObject *obj)
michael@0: {
michael@0:     return IsProxy(obj) && GetProxyHandler(obj) == &CPOWProxyHandler::singleton;
michael@0: }
michael@0: 
michael@0: /* static */ nsresult
michael@0: JavaScriptParent::InstanceOf(JSObject *proxy, const nsID *id, bool *bp)
michael@0: {
michael@0:     JavaScriptParent *parent = ParentOf(proxy);
michael@0:     if (!parent->active())
michael@0:         return NS_ERROR_UNEXPECTED;
michael@0:     return parent->instanceOf(proxy, id, bp);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: JavaScriptParent::instanceOf(JSObject *obj, const nsID *id, bool *bp)
michael@0: {
michael@0:     ObjectId objId = idOf(obj);
michael@0: 
michael@0:     JSIID iid;
michael@0:     ConvertID(*id, &iid);
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallInstanceOf(objId, iid, &status, bp))
michael@0:         return NS_ERROR_UNEXPECTED;
michael@0: 
michael@0:     if (status.type() != ReturnStatus::TReturnSuccess)
michael@0:         return NS_ERROR_UNEXPECTED;
michael@0: 
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: /* static */ bool
michael@0: JavaScriptParent::DOMInstanceOf(JSContext *cx, JSObject *proxy, int prototypeID, int depth, bool *bp)
michael@0: {
michael@0:     FORWARD(domInstanceOf, (cx, proxy, prototypeID, depth, bp));
michael@0: }
michael@0: 
michael@0: bool
michael@0: JavaScriptParent::domInstanceOf(JSContext *cx, JSObject *obj, int prototypeID, int depth, bool *bp)
michael@0: {
michael@0:     ObjectId objId = idOf(obj);
michael@0: 
michael@0:     ReturnStatus status;
michael@0:     if (!CallDOMInstanceOf(objId, prototypeID, depth, &status, bp))
michael@0:         return ipcfail(cx);
michael@0: 
michael@0:     return ok(cx, status);
michael@0: }
michael@0: 
michael@0: mozilla::ipc::IProtocol*
michael@0: JavaScriptParent::CloneProtocol(Channel* aChannel, ProtocolCloneContext* aCtx)
michael@0: {
michael@0:     ContentParent *contentParent = aCtx->GetContentParent();
michael@0:     nsAutoPtr<PJavaScriptParent> actor(contentParent->AllocPJavaScriptParent());
michael@0:     if (!actor || !contentParent->RecvPJavaScriptConstructor(actor)) {
michael@0:         return nullptr;
michael@0:     }
michael@0:     return actor.forget();
michael@0: }