Ejemplo n.º 1
0
// static
XPCWrappedNativeScope*
XPCWrappedNativeScope::FindInJSObjectScope(JSContext* cx, JSObject* obj,
                                           JSBool OKIfNotInitialized,
                                           XPCJSRuntime* runtime)
{
    XPCWrappedNativeScope* scope;

    if(!obj)
        return nsnull;

    // If this object is itself a wrapped native then we can get the
    // scope directly.

    scope = GetScopeOfObject(obj);
    if(scope)
        return scope;

    // Else we'll have to look up the parent chain to get the scope

    obj = JS_GetGlobalForObject(cx, obj);

    if(!runtime)
    {
        runtime = nsXPConnect::GetRuntime();
        if(!runtime)
            return nsnull;
    }

    // XXX We are assuming that the scope count is low enough that traversing
    // the linked list is more reasonable then doing a hashtable lookup.
    {   // scoped lock
        XPCAutoLock lock(runtime->GetMapLock());

        DEBUG_TrackScopeTraversal();

        for(XPCWrappedNativeScope* cur = gScopes; cur; cur = cur->mNext)
        {
            if(obj == cur->GetGlobalJSObject())
            {
                DEBUG_CheckForComponentsInScope(cx, obj, OKIfNotInitialized, runtime);
                return cur;
            }
        }
    }

    // Failure to find the scope is only OK if the caller told us it might fail.
    // This flag would only be set in the call from
    // XPCWrappedNativeScope::GetNewOrUsed
    NS_ASSERTION(OKIfNotInitialized, "No scope has this global object!");
    return nsnull;
}
Ejemplo n.º 2
0
// static
XPCWrappedNativeScope*
XPCWrappedNativeScope::FindInJSObjectScope(JSContext* cx, JSObject* obj,
                                           JSBool OKIfNotInitialized,
                                           XPCJSRuntime* runtime)
{
    XPCWrappedNativeScope* scope;

    if (!obj)
        return nsnull;

    // If this object is itself a wrapped native then we can get the
    // scope directly.

    scope = GetScopeOfObject(obj);
    if (scope)
        return scope;

    // Else we'll have to look up the parent chain to get the scope

    JSAutoEnterCompartment ac;
    ac.enterAndIgnoreErrors(cx, obj);

#ifdef DEBUG
    JSObject *startingObj = obj;
#endif

    obj = JS_GetGlobalForObject(cx, obj);

    if (js::GetObjectClass(obj)->flags & JSCLASS_XPCONNECT_GLOBAL) {
        scope = XPCWrappedNativeScope::GetNativeScope(cx, obj);
        if (scope)
            return scope;
    }

    if (!runtime) {
        runtime = nsXPConnect::GetRuntimeInstance();
        NS_ASSERTION(runtime, "This should never be null!");
    }

    // XXX We are assuming that the scope count is low enough that traversing
    // the linked list is more reasonable then doing a hashtable lookup.
    XPCWrappedNativeScope* found = nsnull;
    {   // scoped lock
        XPCAutoLock lock(runtime->GetMapLock());

        DEBUG_TrackScopeTraversal();

        for (XPCWrappedNativeScope* cur = gScopes; cur; cur = cur->mNext) {
            if (obj == cur->GetGlobalJSObject()) {
                found = cur;
                break;
            }
        }
    }

    if (found) {
        // This cannot be called within the map lock!
        DEBUG_CheckForComponentsInScope(cx, obj, startingObj,
                                        OKIfNotInitialized, runtime);
        return found;
    }

    // Failure to find the scope is only OK if the caller told us it might fail.
    // This flag would only be set in the call from
    // XPCWrappedNativeScope::GetNewOrUsed
    NS_ASSERTION(OKIfNotInitialized, "No scope has this global object!");
    return nsnull;
}