示例#1
0
bool
CrossCompartmentWrapper::call(JSContext *cx, JSObject *wrapperArg, unsigned argc, Value *vp)
{
    RootedObject wrapper(cx, wrapperArg);
    RootedObject wrapped(cx, wrappedObject(wrapper));

    CallArgs args = CallArgsFromVp(argc, vp);
    {
        AutoCompartment call(cx, wrapped);

        args.setCallee(ObjectValue(*wrapped));
        if (!cx->compartment->wrap(cx, args.mutableThisv()))
            return false;

        for (size_t n = 0; n < args.length(); ++n) {
            if (!cx->compartment->wrap(cx, args.handleAt(n)))
                return false;
        }

        if (!Wrapper::call(cx, wrapper, argc, vp))
            return false;
    }

    return cx->compartment->wrap(cx, args.rval());
}
示例#2
0
bool
CrossCompartmentWrapper::construct(JSContext *cx, HandleObject wrapper, const CallArgs &args)
{
    RootedObject wrapped(cx, wrappedObject(wrapper));
    {
        AutoCompartment call(cx, wrapped);

        for (size_t n = 0; n < args.length(); ++n) {
            if (!cx->compartment->wrap(cx, args.handleAt(n)))
                return false;
        }
        if (!Wrapper::construct(cx, wrapper, args))
            return false;
    }
    return cx->compartment->wrap(cx, args.rval());
}
示例#3
0
/**
 * Handles an assertion failure in self-hosted code just like an assertion
 * failure in C++ code. Information about the failure can be provided in args[0].
 */
static JSBool
intrinsic_AssertionFailed(JSContext *cx, unsigned argc, Value *vp)
{
#ifdef DEBUG
    CallArgs args = CallArgsFromVp(argc, vp);
    if (args.length() > 0) {
        // try to dump the informative string
        JSString *str = ToString<CanGC>(cx, args.handleAt(0));
        if (str) {
            const jschar *chars = str->getChars(cx);
            if (chars) {
                fprintf(stderr, "Self-hosted JavaScript assertion info: ");
                JSString::dumpChars(chars, str->length());
                fputc('\n', stderr);
            }
        }
    }
#endif
    JS_ASSERT(false);
    return false;
}
示例#4
0
bool
CrossCompartmentWrapper::call(JSContext *cx, HandleObject wrapper, const CallArgs &args)
{
    RootedObject wrapped(cx, wrappedObject(wrapper));

    {
        AutoCompartment call(cx, wrapped);

        args.setCallee(ObjectValue(*wrapped));
        if (!cx->compartment()->wrap(cx, args.mutableThisv()))
            return false;

        for (size_t n = 0; n < args.length(); ++n) {
            if (!cx->compartment()->wrap(cx, args.handleAt(n)))
                return false;
        }

        if (!Wrapper::call(cx, wrapper, args))
            return false;
    }

    return cx->compartment()->wrap(cx, args.rval());
}
示例#5
0
static JSBool
intrinsic_MakeConstructible(JSContext *cx, unsigned argc, Value *vp)
{
    CallArgs args = CallArgsFromVp(argc, vp);
    JS_ASSERT(args.length() == 2);
    JS_ASSERT(args[0].isObject());
    JS_ASSERT(args[0].toObject().is<JSFunction>());
    JS_ASSERT(args[1].isObject());

    // Normal .prototype properties aren't enumerable.  But for this to clone
    // correctly, it must be enumerable.
    RootedObject ctor(cx, &args[0].toObject());
    if (!JSObject::defineProperty(cx, ctor, cx->names().classPrototype, args.handleAt(1),
                                  JS_PropertyStub, JS_StrictPropertyStub,
                                  JSPROP_READONLY | JSPROP_ENUMERATE | JSPROP_PERMANENT))
    {
        return false;
    }

    ctor->as<JSFunction>().setIsSelfHostedConstructor();
    args.rval().setUndefined();
    return true;
}
示例#6
0
static JSBool
Exception(JSContext *cx, unsigned argc, Value *vp)
{
    CallArgs args = CallArgsFromVp(argc, vp);

    /*
     * ECMA ed. 3, 15.11.1 requires Error, etc., to construct even when
     * called as functions, without operator new.  But as we do not give
     * each constructor a distinct JSClass, whose .name member is used by
     * NewNativeClassInstance to find the class prototype, we must get the
     * class prototype ourselves.
     */
    RootedObject callee(cx, &args.callee());
    RootedValue protov(cx);
    if (!JSObject::getProperty(cx, callee, callee, cx->names().classPrototype, &protov))
        return false;

    if (!protov.isObject()) {
        JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_PROTOTYPE, "Error");
        return false;
    }

    RootedObject obj(cx, NewObjectWithGivenProto(cx, &ErrorObject::class_, &protov.toObject(),
                     NULL));
    if (!obj)
        return false;

    /* Set the 'message' property. */
    RootedString message(cx);
    if (args.hasDefined(0)) {
        message = ToString<CanGC>(cx, args.handleAt(0));
        if (!message)
            return false;
        args[0].setString(message);
    } else {
        message = NULL;
    }

    /* Find the scripted caller. */
    NonBuiltinScriptFrameIter iter(cx);

    /* Set the 'fileName' property. */
    RootedScript script(cx, iter.done() ? NULL : iter.script());
    RootedString filename(cx);
    if (args.length() > 1) {
        filename = ToString<CanGC>(cx, args.handleAt(1));
        if (!filename)
            return false;
        args[1].setString(filename);
    } else {
        filename = cx->runtime()->emptyString;
        if (!iter.done()) {
            if (const char *cfilename = script->filename()) {
                filename = FilenameToString(cx, cfilename);
                if (!filename)
                    return false;
            }
        }
    }

    /* Set the 'lineNumber' property. */
    uint32_t lineno, column = 0;
    if (args.length() > 2) {
        if (!ToUint32(cx, args[2], &lineno))
            return false;
    } else {
        lineno = iter.done() ? 0 : PCToLineNumber(script, iter.pc(), &column);
    }

    int exnType = args.callee().as<JSFunction>().getExtendedSlot(0).toInt32();
    if (!InitExnPrivate(cx, obj, message, filename, lineno, column, NULL, exnType))
        return false;

    args.rval().setObject(*obj);
    return true;
}
示例#7
0
/*
 * Compile a new |RegExpShared| for the |RegExpObject|.
 *
 * Per ECMAv5 15.10.4.1, we act on combinations of (pattern, flags) as
 * arguments:
 *
 *  RegExp, undefined => flags := pattern.flags
 *  RegExp, _ => throw TypeError
 *  _ => pattern := ToString(pattern) if defined(pattern) else ''
 *       flags := ToString(flags) if defined(flags) else ''
 */
static bool
CompileRegExpObject(JSContext *cx, RegExpObjectBuilder &builder, CallArgs args)
{
    if (args.length() == 0) {
        RegExpStatics *res = cx->regExpStatics();
        Rooted<JSAtom*> empty(cx, cx->runtime()->emptyString);
        RegExpObject *reobj = builder.build(empty, res->getFlags());
        if (!reobj)
            return false;
        args.rval().setObject(*reobj);
        return true;
    }

    RootedValue sourceValue(cx, args[0]);

    /*
     * If we get passed in an object whose internal [[Class]] property is
     * "RegExp", return a new object with the same source/flags.
     */
    if (IsObjectWithClass(sourceValue, ESClass_RegExp, cx)) {
        /*
         * Beware, sourceObj may be a (transparent) proxy to a RegExp, so only
         * use generic (proxyable) operations on sourceObj that do not assume
         * sourceObj.is<RegExpObject>().
         */
        RootedObject sourceObj(cx, &sourceValue.toObject());

        if (args.hasDefined(1)) {
            JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_NEWREGEXP_FLAGGED);
            return false;
        }

        /*
         * Only extract the 'flags' out of sourceObj; do not reuse the
         * RegExpShared since it may be from a different compartment.
         */
        RegExpFlag flags;
        {
            RegExpGuard g(cx);
            if (!RegExpToShared(cx, sourceObj, &g))
                return false;

            flags = g->getFlags();
        }

        /*
         * 'toSource' is a permanent read-only property, so this is equivalent
         * to executing RegExpObject::getSource on the unwrapped object.
         */
        RootedValue v(cx);
        if (!JSObject::getProperty(cx, sourceObj, sourceObj, cx->names().source, &v))
            return false;

        Rooted<JSAtom*> sourceAtom(cx, &v.toString()->asAtom());
        RegExpObject *reobj = builder.build(sourceAtom, flags);
        if (!reobj)
            return false;

        args.rval().setObject(*reobj);
        return true;
    }

    RootedAtom source(cx);
    if (sourceValue.isUndefined()) {
        source = cx->runtime()->emptyString;
    } else {
        /* Coerce to string and compile. */
        JSString *str = ToString<CanGC>(cx, sourceValue);
        if (!str)
            return false;

        source = AtomizeString<CanGC>(cx, str);
        if (!source)
            return false;
    }

    RegExpFlag flags = RegExpFlag(0);
    if (args.hasDefined(1)) {
        RootedString flagStr(cx, ToString<CanGC>(cx, args.handleAt(1)));
        if (!flagStr)
            return false;
        args[1].setString(flagStr);
        if (!ParseRegExpFlags(cx, flagStr, &flags))
            return false;
    }

    RootedAtom escapedSourceStr(cx, EscapeNakedForwardSlashes(cx, source));
    if (!escapedSourceStr)
        return false;

    if (!js::RegExpShared::checkSyntax(cx, NULL, escapedSourceStr))
        return false;

    RegExpStatics *res = cx->regExpStatics();
    RegExpObject *reobj = builder.build(escapedSourceStr, RegExpFlag(flags | res->getFlags()));
    if (!reobj)
        return false;

    args.rval().setObject(*reobj);
    return true;
}