JS_NEVER_INLINE bool
cls_testIsAboutToBeFinalized_bug528645::createAndTestRooted()
{
    jsvalRoot root(cx);

    /*
     * Check various types of GC things against JS_IsAboutToBeFinalized.
     * Make sure to include unit and numeric strings to the set.
     */
    EVAL("var x = 1.1; "
         "[''+x, 'a', '123456789', 'something'.substring(1), "
         "{}, [], new Function('return 10;'), <xml/>];",
         root.addr());

    JSObject *array = JSVAL_TO_OBJECT(root.value());
    JS_ASSERT(JS_IsArrayObject(cx, array));

    JSBool ok = JS_GetArrayLength(cx, array, &checkPointersLength);
    CHECK(ok);

    checkPointers = (void **) malloc(sizeof(void *) * checkPointersLength);
    CHECK(checkPointers);

    checkPointersStaticStrings = 0;
    for (jsuint i = 0; i != checkPointersLength; ++i) {
        jsval v;
        ok = JS_GetElement(cx, array, i, &v);
        CHECK(ok);
        JS_ASSERT(JSVAL_IS_GCTHING(v));
        JS_ASSERT(!JSVAL_IS_NULL(v));
        checkPointers[i] = JSVAL_TO_GCTHING(v);
        if (JSString::isStatic(checkPointers[i]))
            ++checkPointersStaticStrings;
    }

    oldGCCallback = JS_SetGCCallback(cx, TestAboutToBeFinalizedCallback);
    JS_GC(cx);

    /*
     * All GC things are rooted via the root holding the array containing them
     * and TestAboutToBeFinalizedCallback must keep them as is.
     */
    for (jsuint i = 0; i != checkPointersLength; ++i)
        CHECK(checkPointers[i]);

    /*
     * Overwrite the registers and stack with new GC things to avoid false
     * positives with the finalization test.
     */
    EVAL("[]", root.addr());

    array = JSVAL_TO_OBJECT(root.value());
    JS_ASSERT(JS_IsArrayObject(cx, array));

    jsuint tmp;
    CHECK(JS_GetArrayLength(cx, array, &tmp));
    CHECK(ok);

    return true;
}
Exemple #2
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 void PersistentGCReference::MakeWeak(WeakReferenceCallback callback, void *context) {
   if (!setupWeakRefs) {
     JS_SetGCCallback(cx(), GCCallback);
     setupWeakRefs = true;
   }
   this->callback = callback;
   this->context = context;
   next = weakPtrs;
   prev = NULL;
   weakPtrs = this;
   unroot(cx());
 }
Exemple #3
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MozJSImplScope::MozJSImplScope(MozJSScriptEngine* engine)
    : _engine(engine),
      _mr(),
      _runtime(_mr._runtime),
      _context(_mr._context),
      _globalProto(_context),
      _global(_globalProto.getProto()),
      _funcs(),
      _internedStrings(_context),
      _pendingKill(false),
      _opId(0),
      _opCtx(nullptr),
      _pendingGC(false),
      _connectState(ConnectState::Not),
      _status(Status::OK()),
      _quickExit(false),
      _generation(0),
      _binDataProto(_context),
      _bsonProto(_context),
      _countDownLatchProto(_context),
      _cursorProto(_context),
      _cursorHandleProto(_context),
      _dbCollectionProto(_context),
      _dbPointerProto(_context),
      _dbQueryProto(_context),
      _dbProto(_context),
      _dbRefProto(_context),
      _errorProto(_context),
      _jsThreadProto(_context),
      _maxKeyProto(_context),
      _minKeyProto(_context),
      _mongoExternalProto(_context),
      _mongoHelpersProto(_context),
      _mongoLocalProto(_context),
      _nativeFunctionProto(_context),
      _numberIntProto(_context),
      _numberLongProto(_context),
      _numberDecimalProto(_context),
      _objectProto(_context),
      _oidProto(_context),
      _regExpProto(_context),
      _timestampProto(_context) {
    kCurrentScope = this;

    // The default is quite low and doesn't seem to directly correlate with
    // malloc'd bytes.  Set it to MAX_INT here and catching things in the
    // jscustomallocator.cpp
    JS_SetGCParameter(_runtime, JSGC_MAX_BYTES, 0xffffffff);

    JS_SetInterruptCallback(_runtime, _interruptCallback);
    JS_SetGCCallback(_runtime, _gcCallback, this);
    JS_SetContextPrivate(_context, this);
    JSAutoRequest ar(_context);

    JS_SetErrorReporter(_runtime, _reportError);

    JSAutoCompartment ac(_context, _global);

    _checkErrorState(JS_InitStandardClasses(_context, _global));

    installBSONTypes();

    JS_FireOnNewGlobalObject(_context, _global);

    execSetup(JSFiles::assert);
    execSetup(JSFiles::types);

    // install process-specific utilities in the global scope (dependancy: types.js, assert.js)
    if (_engine->getScopeInitCallback())
        _engine->getScopeInitCallback()(*this);

    // install global utility functions
    installGlobalUtils(*this);
    _mongoHelpersProto.install(_global);
}
Exemple #4
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static GObject*
gjs_context_constructor (GType                  type,
                         guint                  n_construct_properties,
                         GObjectConstructParam *construct_params)
{
    GObject *object;
    GjsContext *js_context;
    guint32 options_flags;
    JSVersion js_version;

    object = (* G_OBJECT_CLASS (gjs_context_parent_class)->constructor) (type,
                                                                         n_construct_properties,
                                                                         construct_params);

    js_context = GJS_CONTEXT(object);

    if (js_context->runtime == NULL) {
        js_context->runtime = JS_NewRuntime(32*1024*1024 /* max bytes */);
        if (js_context->runtime == NULL)
            gjs_fatal("Failed to create javascript runtime");
        JS_SetGCParameter(js_context->runtime, JSGC_MAX_BYTES, 0xffffffff);
        js_context->we_own_runtime = TRUE;
        gjs_runtime_init(js_context->runtime);
    }

    js_context->context = JS_NewContext(js_context->runtime, 8192 /* stack chunk size */);
    if (js_context->context == NULL)
        gjs_fatal("Failed to create javascript context");

    JS_BeginRequest(js_context->context);

    /* same as firefox, see discussion at
     * https://bugzilla.mozilla.org/show_bug.cgi?id=420869 */
    JS_SetScriptStackQuota(js_context->context, 100*1024*1024);

    /* JSOPTION_DONT_REPORT_UNCAUGHT: Don't send exceptions to our
     * error report handler; instead leave them set.  This allows us
     * to get at the exception object.
     *
     * JSOPTION_STRICT: Report warnings to error reporter function.
     */
    options_flags = JSOPTION_DONT_REPORT_UNCAUGHT | JSOPTION_STRICT;

    if (!g_getenv("GJS_DISABLE_JIT")) {
        gjs_debug(GJS_DEBUG_CONTEXT, "Enabling JIT");
        options_flags |= JSOPTION_METHODJIT;
    }

    JS_SetOptions(js_context->context,
                  JS_GetOptions(js_context->context) | options_flags);

    JS_SetLocaleCallbacks(js_context->context, &gjs_locale_callbacks);

    JS_SetErrorReporter(js_context->context, gjs_error_reporter);

    /* set ourselves as the private data */
    JS_SetContextPrivate(js_context->context, js_context);

    js_version = JS_StringToVersion(js_context->jsversion_string);
    /* It doesn't make sense to throw here; just use the default if we
     * don't know.
     */
    if (js_version == JSVERSION_UNKNOWN)
        js_version = JSVERSION_DEFAULT;
    /* Set the version if we need to. */
    if (js_version != JSVERSION_DEFAULT && JS_GetVersion(js_context->context) != js_version) {
        gjs_debug(GJS_DEBUG_CONTEXT,
                  "Changing JavaScript version to %s from %s",
                  JS_VersionToString(js_version),
                  JS_VersionToString(JS_GetVersion(js_context->context)));

        JS_SetVersion(js_context->context, js_version);
    }

    if (!gjs_init_context_standard(js_context->context))
        gjs_fatal("Failed to initialize context");
    js_context->global = JS_GetGlobalObject(js_context->context);

    if (!JS_DefineProperty(js_context->context, js_context->global,
                           "window", OBJECT_TO_JSVAL(js_context->global),
                           NULL, NULL,
                           JSPROP_READONLY | JSPROP_PERMANENT))
        gjs_fatal("No memory to export global object as 'window'");

    /* Define a global function called log() */
    if (!JS_DefineFunction(js_context->context, js_context->global,
                           "log",
                           (JSNative)gjs_log,
                           1, GJS_MODULE_PROP_FLAGS))
        gjs_fatal("Failed to define log function");

    if (!JS_DefineFunction(js_context->context, js_context->global,
                           "logError",
                           (JSNative)gjs_log_error,
                           2, GJS_MODULE_PROP_FLAGS))
        gjs_fatal("Failed to define logError function");

    /* Define global functions called print() and printerr() */
    if (!JS_DefineFunction(js_context->context, js_context->global,
                           "print",
                           (JSNative)gjs_print,
                           3, GJS_MODULE_PROP_FLAGS))
        gjs_fatal("Failed to define print function");
    if (!JS_DefineFunction(js_context->context, js_context->global,
                           "printerr",
                           (JSNative)gjs_printerr,
                           4, GJS_MODULE_PROP_FLAGS))
        gjs_fatal("Failed to define printerr function");

    /* We need to know what the default context is, since it's the context whose
     * global object is used to load imported JS modules. We currently say that
     * it's the context of the runtime's owner, but if we needed to support
     * externally created runtimes, we could define it in some other fashion.
     */
    if (js_context->we_own_runtime) {
        gjs_runtime_set_default_context(js_context->runtime, js_context->context);
    } else {
        if (gjs_runtime_get_default_context(js_context->runtime) == NULL)
            gjs_fatal("GjsContext created for a runtime not owned by GJS");
    }

    /* We create the global-to-runtime root importer with the
     * passed-in search path. If someone else already created
     * the root importer, this is a no-op.
     */
    if (!gjs_create_root_importer(js_context->context,
                                  js_context->search_path ?
                                  (const char**) js_context->search_path :
                                  NULL,
                                  TRUE))
        gjs_fatal("Failed to create root importer");

    /* Now copy the global root importer (which we just created,
     * if it didn't exist) to our global object
     */
    if (!gjs_define_root_importer(js_context->context,
                                  js_context->global,
                                  "imports"))
        gjs_fatal("Failed to point 'imports' property at root importer");

    if (js_context->we_own_runtime) {
        js_context->profiler = gjs_profiler_new(js_context->runtime);
    }

    if (!gjs_is_registered_native_module(js_context->context, NULL, "gi"))
        gjs_register_native_module("gi", gjs_define_gi_stuff, GJS_NATIVE_SUPPLIES_MODULE_OBJ);

    /* For GjsDBus */
    {
        char *priv_typelib_dir = g_build_filename (PKGLIBDIR, "girepository-1.0", NULL);
        g_irepository_prepend_search_path(priv_typelib_dir);
        g_free (priv_typelib_dir);
    }

    if (js_context->gc_notifications_enabled)
        JS_SetGCCallback(js_context->context, gjs_on_context_gc);

    JS_EndRequest(js_context->context);

    g_static_mutex_lock (&contexts_lock);
    all_contexts = g_list_prepend(all_contexts, object);
    g_static_mutex_unlock (&contexts_lock);

    return object;
}