mirror of
https://github.com/mozilla/gecko-dev.git
synced 2025-11-11 13:48:23 +02:00
c4745d28b1
CLOSED TREE Backed out changeset 7613fc978d36 (bug 1142794) Backed out changeset e5f0cb31263d (bug 1142784) Backed out changeset dcd0af73ac84 (bug 1142784) Backed out changeset 034f9c8e79ee (bug 1142784) Backed out changeset ce0ee37e3ca9 (bug 1142775) Backed out changeset 1519b8f2bbba (bug 1142761) Backed out changeset 26fd55677841 (bug 1139683) Backed out changeset 7ebc76a450c3 (bug 1144819) Backed out changeset 92adb459d519 (bug 1143810)
687 lines
19 KiB
C++
687 lines
19 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=4 sw=4 et tw=80:
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WrapperAnswer.h"
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#include "JavaScriptLogging.h"
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#include "mozilla/dom/ContentChild.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "xpcprivate.h"
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#include "jsfriendapi.h"
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using namespace JS;
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using namespace mozilla;
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using namespace mozilla::jsipc;
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// Note - Using AutoJSAPI (rather than AutoEntryScript) for a trap means
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// that we don't expect it to run script. For most of these traps that will only
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// happen if the target is a scripted proxy, which is probably something that we
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// don't want to support over CPOWs. When enough code is fixed up, the long-term
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// plan is to have the JS engine throw if it encounters script when it isn't
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// expecting it.
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using mozilla::dom::AutoJSAPI;
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using mozilla::dom::AutoEntryScript;
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bool
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WrapperAnswer::fail(JSContext *cx, ReturnStatus *rs)
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{
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// By default, we set |undefined| unless we can get a more meaningful
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// exception.
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*rs = ReturnStatus(ReturnException(JSVariant(UndefinedVariant())));
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// Note we always return true from this function, since this propagates
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// to the IPC code, and we don't want a JS failure to cause the death
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// of the child process.
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RootedValue exn(cx);
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if (!JS_GetPendingException(cx, &exn))
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return true;
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// If we don't clear the pending exception, JS will try to wrap it as it
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// leaves the current compartment. Since there is no previous compartment,
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// that would crash.
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JS_ClearPendingException(cx);
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if (JS_IsStopIteration(exn)) {
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*rs = ReturnStatus(ReturnStopIteration());
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return true;
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}
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// If this fails, we still don't want to exit. Just return an invalid
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// exception.
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(void) toVariant(cx, exn, &rs->get_ReturnException().exn());
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return true;
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}
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bool
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WrapperAnswer::ok(ReturnStatus *rs)
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{
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*rs = ReturnStatus(ReturnSuccess());
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return true;
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}
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bool
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WrapperAnswer::ok(ReturnStatus *rs, const JS::ObjectOpResult &result)
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{
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*rs = result
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? ReturnStatus(ReturnSuccess())
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: ReturnStatus(ReturnObjectOpResult(result.failureCode()));
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return true;
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}
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bool
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WrapperAnswer::RecvPreventExtensions(const ObjectId &objId, ReturnStatus *rs)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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ObjectOpResult success;
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if (!JS_PreventExtensions(cx, obj, success))
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return fail(cx, rs);
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LOG("%s.preventExtensions()", ReceiverObj(objId));
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return ok(rs, success);
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}
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static void
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EmptyDesc(PPropertyDescriptor *desc)
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{
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desc->obj() = LocalObject(0);
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desc->attrs() = 0;
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desc->value() = UndefinedVariant();
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desc->getter() = 0;
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desc->setter() = 0;
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}
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bool
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WrapperAnswer::RecvGetPropertyDescriptor(const ObjectId &objId, const JSIDVariant &idVar,
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ReturnStatus *rs, PPropertyDescriptor *out)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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EmptyDesc(out);
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("%s.getPropertyDescriptor(%s)", ReceiverObj(objId), Identifier(idVar));
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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Rooted<JSPropertyDescriptor> desc(cx);
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if (!JS_GetPropertyDescriptorById(cx, obj, id, &desc))
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return fail(cx, rs);
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if (!fromDescriptor(cx, desc, out))
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return fail(cx, rs);
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvGetOwnPropertyDescriptor(const ObjectId &objId, const JSIDVariant &idVar,
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ReturnStatus *rs, PPropertyDescriptor *out)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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EmptyDesc(out);
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("%s.getOwnPropertyDescriptor(%s)", ReceiverObj(objId), Identifier(idVar));
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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Rooted<JSPropertyDescriptor> desc(cx);
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if (!JS_GetOwnPropertyDescriptorById(cx, obj, id, &desc))
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return fail(cx, rs);
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if (!fromDescriptor(cx, desc, out))
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return fail(cx, rs);
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvDefineProperty(const ObjectId &objId, const JSIDVariant &idVar,
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const PPropertyDescriptor &descriptor, ReturnStatus *rs)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("define %s[%s]", ReceiverObj(objId), Identifier(idVar));
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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Rooted<JSPropertyDescriptor> desc(cx);
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if (!toDescriptor(cx, descriptor, &desc))
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return fail(cx, rs);
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ObjectOpResult success;
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if (!js::DefineOwnProperty(cx, obj, id, desc, success))
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return fail(cx, rs);
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return ok(rs, success);
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}
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bool
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WrapperAnswer::RecvDelete(const ObjectId &objId, const JSIDVariant &idVar, ReturnStatus *rs)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("delete %s[%s]", ReceiverObj(objId), Identifier(idVar));
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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ObjectOpResult success;
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if (!JS_DeletePropertyById(cx, obj, id, success))
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return fail(cx, rs);
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return ok(rs, success);
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}
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bool
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WrapperAnswer::RecvHas(const ObjectId &objId, const JSIDVariant &idVar, ReturnStatus *rs, bool *bp)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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*bp = false;
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("%s.has(%s)", ReceiverObj(objId), Identifier(idVar));
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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bool found;
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if (!JS_HasPropertyById(cx, obj, id, &found))
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return fail(cx, rs);
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*bp = !!found;
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvHasOwn(const ObjectId &objId, const JSIDVariant &idVar, ReturnStatus *rs,
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bool *bp)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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*bp = false;
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("%s.hasOwn(%s)", ReceiverObj(objId), Identifier(idVar));
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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Rooted<JSPropertyDescriptor> desc(cx);
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if (!JS_GetPropertyDescriptorById(cx, obj, id, &desc))
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return fail(cx, rs);
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*bp = (desc.object() == obj);
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvGet(const ObjectId &objId, const ObjectVariant &receiverVar,
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const JSIDVariant &idVar, ReturnStatus *rs, JSVariant *result)
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{
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// We may run scripted getters.
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AutoEntryScript aes(xpc::NativeGlobal(scopeForTargetObjects()));
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JSContext *cx = aes.cx();
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// The outparam will be written to the buffer, so it must be set even if
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// the parent won't read it.
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*result = UndefinedVariant();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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RootedObject receiver(cx, fromObjectVariant(cx, receiverVar));
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if (!receiver)
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return fail(cx, rs);
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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JS::RootedValue val(cx);
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if (!JS_ForwardGetPropertyTo(cx, obj, id, receiver, &val))
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return fail(cx, rs);
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if (!toVariant(cx, val, result))
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return fail(cx, rs);
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LOG("get %s.%s = %s", ReceiverObj(objId), Identifier(idVar), OutVariant(*result));
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvSet(const ObjectId &objId, const ObjectVariant &receiverVar,
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const JSIDVariant &idVar, const JSVariant &value, ReturnStatus *rs,
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JSVariant *resultValue)
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{
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// We may run scripted setters.
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AutoEntryScript aes(xpc::NativeGlobal(scopeForTargetObjects()));
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JSContext *cx = aes.cx();
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// The outparam will be written to the buffer, so it must be set even if
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// the parent won't read it.
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*resultValue = UndefinedVariant();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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RootedObject receiver(cx, fromObjectVariant(cx, receiverVar));
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if (!receiver)
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return fail(cx, rs);
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LOG("set %s[%s] = %s", ReceiverObj(objId), Identifier(idVar), InVariant(value));
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RootedId id(cx);
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if (!fromJSIDVariant(cx, idVar, &id))
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return fail(cx, rs);
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RootedValue val(cx);
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if (!fromVariant(cx, value, &val))
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return fail(cx, rs);
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ObjectOpResult result;
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RootedValue receiverVal(cx, ObjectValue(*receiver));
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if (!JS_ForwardSetPropertyTo(cx, obj, id, val, receiverVal, result))
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return fail(cx, rs);
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if (!toVariant(cx, val, resultValue))
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return fail(cx, rs);
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return ok(rs, result);
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}
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bool
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WrapperAnswer::RecvIsExtensible(const ObjectId &objId, ReturnStatus *rs, bool *result)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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*result = false;
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("%s.isExtensible()", ReceiverObj(objId));
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bool extensible;
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if (!JS_IsExtensible(cx, obj, &extensible))
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return fail(cx, rs);
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*result = !!extensible;
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvCallOrConstruct(const ObjectId &objId,
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InfallibleTArray<JSParam> &&argv,
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const bool &construct,
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ReturnStatus *rs,
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JSVariant *result,
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nsTArray<JSParam> *outparams)
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{
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AutoEntryScript aes(xpc::NativeGlobal(scopeForTargetObjects()));
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JSContext *cx = aes.cx();
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// The outparam will be written to the buffer, so it must be set even if
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// the parent won't read it.
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*result = UndefinedVariant();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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MOZ_ASSERT(argv.Length() >= 2);
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RootedValue objv(cx);
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if (!fromVariant(cx, argv[0], &objv))
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return fail(cx, rs);
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*result = JSVariant(UndefinedVariant());
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AutoValueVector vals(cx);
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AutoValueVector outobjects(cx);
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for (size_t i = 0; i < argv.Length(); i++) {
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if (argv[i].type() == JSParam::Tvoid_t) {
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// This is an outparam.
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RootedObject obj(cx, xpc::NewOutObject(cx));
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if (!obj)
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return fail(cx, rs);
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if (!outobjects.append(ObjectValue(*obj)))
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return fail(cx, rs);
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if (!vals.append(ObjectValue(*obj)))
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return fail(cx, rs);
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} else {
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RootedValue v(cx);
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if (!fromVariant(cx, argv[i].get_JSVariant(), &v))
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return fail(cx, rs);
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if (!vals.append(v))
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return fail(cx, rs);
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}
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}
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RootedValue rval(cx);
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{
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AutoSaveContextOptions asco(cx);
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ContextOptionsRef(cx).setDontReportUncaught(true);
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HandleValueArray args = HandleValueArray::subarray(vals, 2, vals.length() - 2);
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bool success;
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if (construct)
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success = JS::Construct(cx, vals[0], args, &rval);
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else
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success = JS::Call(cx, vals[1], vals[0], args, &rval);
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if (!success)
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return fail(cx, rs);
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}
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if (!toVariant(cx, rval, result))
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return fail(cx, rs);
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// Prefill everything with a dummy jsval.
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for (size_t i = 0; i < outobjects.length(); i++)
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outparams->AppendElement(JSParam(void_t()));
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// Go through each argument that was an outparam, retrieve the "value"
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// field, and add it to a temporary list. We need to do this separately
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// because the outparams vector is not rooted.
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vals.clear();
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for (size_t i = 0; i < outobjects.length(); i++) {
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RootedObject obj(cx, &outobjects[i].toObject());
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RootedValue v(cx);
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bool found;
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if (JS_HasProperty(cx, obj, "value", &found)) {
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if (!JS_GetProperty(cx, obj, "value", &v))
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return fail(cx, rs);
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} else {
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v = UndefinedValue();
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}
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if (!vals.append(v))
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return fail(cx, rs);
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}
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// Copy the outparams. If any outparam is already set to a void_t, we
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// treat this as the outparam never having been set.
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for (size_t i = 0; i < vals.length(); i++) {
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JSVariant variant;
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if (!toVariant(cx, vals[i], &variant))
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return fail(cx, rs);
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outparams->ReplaceElementAt(i, JSParam(variant));
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}
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LOG("%s.call(%s) = %s", ReceiverObj(objId), argv, OutVariant(*result));
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvHasInstance(const ObjectId &objId, const JSVariant &vVar, ReturnStatus *rs, bool *bp)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj)
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return fail(cx, rs);
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LOG("%s.hasInstance(%s)", ReceiverObj(objId), InVariant(vVar));
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RootedValue val(cx);
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if (!fromVariant(cx, vVar, &val))
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return fail(cx, rs);
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if (!JS_HasInstance(cx, obj, val, bp))
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return fail(cx, rs);
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return ok(rs);
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}
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bool
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WrapperAnswer::RecvObjectClassIs(const ObjectId &objId, const uint32_t &classValue,
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bool *result)
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{
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
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return false;
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JSContext *cx = jsapi.cx();
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RootedObject obj(cx, findObjectById(cx, objId));
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if (!obj) {
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// This is very unfortunate, but we have no choice.
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*result = false;
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return true;
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}
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LOG("%s.objectClassIs()", ReceiverObj(objId));
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*result = js::ObjectClassIs(cx, obj, (js::ESClassValue)classValue);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
WrapperAnswer::RecvClassName(const ObjectId &objId, nsString *name)
|
|
{
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
|
|
return false;
|
|
JSContext *cx = jsapi.cx();
|
|
|
|
RootedObject obj(cx, findObjectById(cx, objId));
|
|
if (!obj) {
|
|
// This is very unfortunate, but we have no choice.
|
|
return "<dead CPOW>";
|
|
}
|
|
|
|
LOG("%s.className()", ReceiverObj(objId));
|
|
|
|
*name = NS_ConvertASCIItoUTF16(js::ObjectClassName(cx, obj));
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
WrapperAnswer::RecvGetPrototype(const ObjectId &objId, ReturnStatus *rs, ObjectOrNullVariant *result)
|
|
{
|
|
*result = NullVariant();
|
|
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
|
|
return false;
|
|
JSContext *cx = jsapi.cx();
|
|
|
|
RootedObject obj(cx, findObjectById(cx, objId));
|
|
if (!obj)
|
|
return fail(cx, rs);
|
|
|
|
JS::RootedObject proto(cx);
|
|
if (!JS_GetPrototype(cx, obj, &proto))
|
|
return fail(cx, rs);
|
|
|
|
if (!toObjectOrNullVariant(cx, proto, result))
|
|
return fail(cx, rs);
|
|
|
|
LOG("getPrototype(%s)", ReceiverObj(objId));
|
|
|
|
return ok(rs);
|
|
}
|
|
|
|
bool
|
|
WrapperAnswer::RecvRegExpToShared(const ObjectId &objId, ReturnStatus *rs,
|
|
nsString *source, uint32_t *flags)
|
|
{
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
|
|
return false;
|
|
JSContext *cx = jsapi.cx();
|
|
|
|
RootedObject obj(cx, findObjectById(cx, objId));
|
|
if (!obj)
|
|
return fail(cx, rs);
|
|
|
|
MOZ_RELEASE_ASSERT(JS_ObjectIsRegExp(cx, obj));
|
|
RootedString sourceJSStr(cx, JS_GetRegExpSource(cx, obj));
|
|
if (!sourceJSStr)
|
|
return fail(cx, rs);
|
|
nsAutoJSString sourceStr;
|
|
if (!sourceStr.init(cx, sourceJSStr))
|
|
return fail(cx, rs);
|
|
source->Assign(sourceStr);
|
|
|
|
*flags = JS_GetRegExpFlags(cx, obj);
|
|
|
|
return ok(rs);
|
|
}
|
|
|
|
bool
|
|
WrapperAnswer::RecvGetPropertyKeys(const ObjectId &objId, const uint32_t &flags,
|
|
ReturnStatus *rs, nsTArray<JSIDVariant> *ids)
|
|
{
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
|
|
return false;
|
|
JSContext *cx = jsapi.cx();
|
|
|
|
RootedObject obj(cx, findObjectById(cx, objId));
|
|
if (!obj)
|
|
return fail(cx, rs);
|
|
|
|
LOG("%s.getPropertyKeys()", ReceiverObj(objId));
|
|
|
|
AutoIdVector props(cx);
|
|
if (!js::GetPropertyKeys(cx, obj, flags, &props))
|
|
return fail(cx, rs);
|
|
|
|
for (size_t i = 0; i < props.length(); i++) {
|
|
JSIDVariant id;
|
|
if (!toJSIDVariant(cx, props[i], &id))
|
|
return fail(cx, rs);
|
|
|
|
ids->AppendElement(id);
|
|
}
|
|
|
|
return ok(rs);
|
|
}
|
|
|
|
bool
|
|
WrapperAnswer::RecvInstanceOf(const ObjectId &objId, const JSIID &iid, ReturnStatus *rs,
|
|
bool *instanceof)
|
|
{
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
|
|
return false;
|
|
JSContext *cx = jsapi.cx();
|
|
|
|
*instanceof = false;
|
|
|
|
RootedObject obj(cx, findObjectById(cx, objId));
|
|
if (!obj)
|
|
return fail(cx, rs);
|
|
|
|
LOG("%s.instanceOf()", ReceiverObj(objId));
|
|
|
|
nsID nsiid;
|
|
ConvertID(iid, &nsiid);
|
|
|
|
nsresult rv = xpc::HasInstance(cx, obj, &nsiid, instanceof);
|
|
if (rv != NS_OK)
|
|
return fail(cx, rs);
|
|
|
|
return ok(rs);
|
|
}
|
|
|
|
bool
|
|
WrapperAnswer::RecvDOMInstanceOf(const ObjectId &objId, const int &prototypeID,
|
|
const int &depth, ReturnStatus *rs, bool *instanceof)
|
|
{
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(scopeForTargetObjects())))
|
|
return false;
|
|
JSContext *cx = jsapi.cx();
|
|
*instanceof = false;
|
|
|
|
RootedObject obj(cx, findObjectById(cx, objId));
|
|
if (!obj)
|
|
return fail(cx, rs);
|
|
|
|
LOG("%s.domInstanceOf()", ReceiverObj(objId));
|
|
|
|
bool tmp;
|
|
if (!mozilla::dom::InterfaceHasInstance(cx, prototypeID, depth, obj, &tmp))
|
|
return fail(cx, rs);
|
|
*instanceof = tmp;
|
|
|
|
return ok(rs);
|
|
}
|
|
|
|
bool
|
|
WrapperAnswer::RecvDropObject(const ObjectId &objId)
|
|
{
|
|
JSObject *obj = objects_.find(objId);
|
|
if (obj) {
|
|
objectIdMap(objId.hasXrayWaiver()).remove(obj);
|
|
objects_.remove(objId);
|
|
}
|
|
return true;
|
|
}
|