static JSBool
gjs_main_loop_quit(JSContext *context,
JSObject *obj,
uintN argc,
jsval *argv,
jsval *retval)
{
char *cancel_id;
GMainLoop *main_loop;
if (!gjs_parse_args(context, "quit", "s", argc, argv,
"cancelId", &cancel_id))
return JS_FALSE;
main_loop = g_hash_table_lookup(pending_main_loops, cancel_id);
if (!main_loop) {
g_free(cancel_id);
gjs_throw(context, "No main loop with this id");
return JS_FALSE;
}
g_hash_table_remove(pending_main_loops, cancel_id);
if (!g_main_loop_is_running(main_loop)) {
g_free(cancel_id);
gjs_throw(context, "Main loop was stopped already");
return JS_FALSE;
}
gjs_debug(GJS_DEBUG_MAINLOOP,
"main loop %s quitting in context %p",
cancel_id,
context);
g_free(cancel_id);
g_main_loop_quit(main_loop);
return JS_TRUE;
}
static JSBool
import_directory(JSContext *context,
JSObject *obj,
const std::string &name,
std::vector<std::string> full_paths)
{
JSObject *importer;
gjs_debug(GJS_DEBUG_IMPORTER,
"Importing directory '%s'",
name);
/* We define a sub-importer that has only the given directories on
* its search path. gjs_define_importer() exits if it fails, so
* this always succeeds.
*/
importer = gjs_define_importer(context, obj, name, full_paths, false);
if (importer == NULL)
return JS_FALSE;
return JS_TRUE;
}
void
gjs_define_param_class(JSContext *context,
JS::HandleObject in_object)
{
const char *constructor_name;
JS::RootedObject prototype(context), constructor(context);
GIObjectInfo *info;
constructor_name = "ParamSpec";
if (!gjs_init_class_dynamic(context, in_object, nullptr, "GObject",
constructor_name,
&gjs_param_class,
gjs_param_constructor, 0,
/* props of prototype */
&gjs_param_proto_props[0],
/* funcs of prototype */
&gjs_param_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
gjs_param_constructor_funcs,
&prototype,
&constructor)) {
g_error("Can't init class %s", constructor_name);
}
JS::RootedObject gtype_obj(context,
gjs_gtype_create_gtype_wrapper(context, G_TYPE_PARAM));
JS_DefineProperty(context, constructor, "$gtype", gtype_obj, JSPROP_PERMANENT);
info = (GIObjectInfo*)g_irepository_find_by_gtype(g_irepository_get_default(), G_TYPE_PARAM);
gjs_object_define_static_methods(context, constructor, G_TYPE_PARAM, info);
g_base_info_unref( (GIBaseInfo*) info);
gjs_debug(GJS_DEBUG_GPARAM, "Defined class %s prototype is %p class %p in object %p",
constructor_name, prototype.get(), JS_GetClass(prototype),
in_object.get());
}
/* The "load context" is the one we use for loading
* modules and initializing classes.
*/
JSContext*
gjs_runtime_get_load_context(JSRuntime *runtime)
{
GjsContext *context;
context = gjs_runtime_get_data(runtime, "gjs-load-context");
if (context == NULL) {
gjs_debug(GJS_DEBUG_CONTEXT,
"Creating load context for runtime %p",
runtime);
context = g_object_new(GJS_TYPE_CONTEXT,
"runtime", runtime,
"is-load-context", TRUE,
NULL);
gjs_runtime_set_data(runtime,
"gjs-load-context",
context,
g_object_unref);
}
return (JSContext*)gjs_context_get_native_context(context);
}
JSObject*
gjs_define_importer(JSContext *context,
JSObject *in_object,
const std::string &importer_name,
std::vector<std::string> initial_search_path,
bool add_standard_search_path)
{
JSObject *importer;
importer = gjs_create_importer(context, importer_name, initial_search_path, add_standard_search_path, false, in_object);
if (!JS_DefineProperty(context, in_object,
importer_name.c_str(), OBJECT_TO_JSVAL(importer),
NULL, NULL,
GJS_MODULE_PROP_FLAGS))
g_error("no memory to define importer property");
gjs_debug(GJS_DEBUG_IMPORTER,
"Defined importer '%s' %p in %p", importer_name, importer, in_object);
return importer;
}
JSObject*
gjs_define_importer(JSContext *context,
JSObject *in_object,
const char *importer_name,
const char **initial_search_path,
gboolean add_standard_search_path)
{
JSObject *importer;
importer = gjs_create_importer(context, importer_name, initial_search_path, add_standard_search_path, FALSE, in_object);
if (!JS_DefineProperty(context, in_object,
importer_name, OBJECT_TO_JSVAL(importer),
NULL, NULL,
GJS_MODULE_PROP_FLAGS))
g_error("no memory to define importer property");
gjs_debug(GJS_DEBUG_IMPORTER,
"Defined importer '%s' %p in %p", importer_name, importer, in_object);
return importer;
}
void
gjs_define_param_class(JSContext *context,
JSObject *in_object)
{
const char *constructor_name;
JSObject *prototype;
jsval value;
JSObject *constructor;
constructor_name = "ParamSpec";
if (!gjs_init_class_dynamic(context, in_object,
NULL,
"GObject",
constructor_name,
&gjs_param_class,
gjs_param_constructor, 0,
/* props of prototype */
&gjs_param_proto_props[0],
/* funcs of prototype */
&gjs_param_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
gjs_param_constructor_funcs,
&prototype,
&constructor)) {
g_error("Can't init class %s", constructor_name);
}
value = OBJECT_TO_JSVAL(gjs_gtype_create_gtype_wrapper(context, G_TYPE_PARAM));
JS_DefineProperty(context, constructor, "$gtype", value,
NULL, NULL, JSPROP_PERMANENT);
gjs_debug(GJS_DEBUG_GPARAM, "Defined class %s prototype is %p class %p in object %p",
constructor_name, prototype, JS_GetClass(prototype), in_object);
}
/**
* gjs_import_native_module:
* @context:
* @module_obj:
*
* Return a native module that's been preloaded.
*/
JSBool
gjs_import_native_module(JSContext *context,
JSObject *module_obj,
const char *name)
{
GjsNativeModule *native_module;
JSObject *parent;
gjs_debug(GJS_DEBUG_NATIVE,
"Defining native module '%s'",
name);
if (modules != NULL)
native_module = g_hash_table_lookup(modules, name);
else
native_module = NULL;
if (!native_module) {
gjs_throw(context,
"No native module '%s' has registered itself",
name);
return JS_FALSE;
}
if (native_module->flags & GJS_NATIVE_SUPPLIES_MODULE_OBJ) {
/* In this case we just throw away "module_obj" eventually,
* since the native module defines itself in the parent of
* module_obj directly.
*/
parent = module_get_parent(context, module_obj);
return (* native_module->func) (context, parent);
} else {
return (* native_module->func) (context, module_obj);
}
}
static JSObject*
importer_new(JSContext *context,
gboolean is_root)
{
JSObject *importer;
Importer *priv;
JSObject *global;
JSBool found;
global = gjs_get_import_global(context);
if (!JS_HasProperty(context, global, gjs_importer_class.name, &found))
g_error("HasProperty call failed creating importer class");
if (!found) {
JSObject *prototype;
prototype = JS_InitClass(context, global,
/* parent prototype JSObject* for
* prototype; NULL for
* Object.prototype
*/
NULL,
&gjs_importer_class,
/* constructor for instances (NULL for
* none - just name the prototype like
* Math - rarely correct)
*/
gjs_importer_constructor,
/* number of constructor args */
0,
/* props of prototype */
&gjs_importer_proto_props[0],
/* funcs of prototype */
&gjs_importer_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
NULL);
if (prototype == NULL)
g_error("Can't init class %s", gjs_importer_class.name);
gjs_debug(GJS_DEBUG_IMPORTER, "Initialized class %s prototype %p",
gjs_importer_class.name, prototype);
}
importer = JS_NewObject(context, &gjs_importer_class, NULL, global);
if (importer == NULL)
g_error("No memory to create importer importer");
priv = g_slice_new0(Importer);
priv->is_root = is_root;
GJS_INC_COUNTER(importer);
g_assert(priv_from_js(context, importer) == NULL);
JS_SetPrivate(importer, priv);
gjs_debug_lifecycle(GJS_DEBUG_IMPORTER,
"importer constructor, obj %p priv %p", importer, priv);
return importer;
}
JSBool
gjs_define_error_class(JSContext *context,
JSObject *in_object,
GIEnumInfo *info,
JSObject **constructor_p,
JSObject **prototype_p)
{
const char *constructor_name;
GIBoxedInfo *glib_error_info;
JSObject *prototype, *parent_proto;
JSObject *constructor;
jsval value;
Error *priv;
/* See the comment in gjs_define_boxed_class() for an
* explanation of how this all works; Error is pretty much the
* same as Boxed (except that we inherit from GLib.Error).
*/
constructor_name = g_base_info_get_name( (GIBaseInfo*) info);
if (gjs_object_get_property(context, in_object, constructor_name, &value)) {
JSObject *constructor;
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "Existing property '%s' does not look like a constructor",
constructor_name);
return JS_FALSE;
}
constructor = JSVAL_TO_OBJECT(value);
gjs_object_get_property(context, constructor, "prototype", &value);
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "error %s prototype property does not appear to exist or has wrong type", constructor_name);
return JS_FALSE;
} else {
if (prototype_p)
*prototype_p = JSVAL_TO_OBJECT(value);
if (constructor_p)
*constructor_p = constructor;
return JS_TRUE;
}
}
g_irepository_require(NULL, "GLib", "2.0", 0, NULL);
glib_error_info = (GIBoxedInfo*) g_irepository_find_by_name(NULL, "GLib", "Error");
parent_proto = gjs_lookup_boxed_prototype(context, glib_error_info);
g_base_info_unref((GIBaseInfo*)glib_error_info);
prototype = gjs_init_class_dynamic(context, in_object,
parent_proto,
g_base_info_get_namespace( (GIBaseInfo*) info),
constructor_name,
&gjs_error_class,
gjs_error_constructor,
/* number of constructor args (less can be passed) */
1,
/* props of prototype */
&gjs_error_proto_props[0],
/* funcs of prototype */
&gjs_error_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
&gjs_error_constructor_funcs[0]);
if (prototype == NULL) {
gjs_log_exception(context, NULL);
gjs_fatal("Can't init class %s", constructor_name);
}
g_assert(gjs_object_has_property(context, in_object, constructor_name));
GJS_INC_COUNTER(gerror);
priv = g_slice_new0(Error);
priv->info = info;
g_base_info_ref( (GIBaseInfo*) priv->info);
priv->domain = g_quark_from_string (g_enum_info_get_error_domain(priv->info));
JS_SetPrivate(context, prototype, priv);
gjs_debug(GJS_DEBUG_GBOXED, "Defined class %s prototype is %p class %p in object %p",
constructor_name, prototype, JS_GET_CLASS(context, prototype), in_object);
constructor = NULL;
gjs_object_get_property(context, in_object, constructor_name, &value);
if (!JSVAL_IS_VOID(value)) {
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "Property '%s' does not look like a constructor",
constructor_name);
return JS_FALSE;
}
}
constructor = JSVAL_TO_OBJECT(value);
gjs_define_enum_values(context, constructor, priv->info);
if (constructor_p)
*constructor_p = constructor;
if (prototype_p)
*prototype_p = prototype;
return JS_TRUE;
}
JSBool
gjs_define_param_class(JSContext *context,
JSObject *in_object,
JSObject **prototype_p)
{
const char *constructor_name;
JSObject *prototype;
jsval value;
JSObject *constructor;
constructor_name = "ParamSpec";
gjs_object_get_property(context, in_object, constructor_name, &value);
if (!JSVAL_IS_VOID(value)) {
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "Existing property '%s' does not look like a constructor",
constructor_name);
return JS_FALSE;
}
constructor = JSVAL_TO_OBJECT(value);
gjs_object_get_property(context, constructor, "prototype", &value);
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "prototype property does not appear to exist or has wrong type");
return JS_FALSE;
} else {
if (prototype_p)
*prototype_p = JSVAL_TO_OBJECT(value);
return JS_TRUE;
}
return JS_TRUE;
}
/* we could really just use JS_InitClass for this since we have one class instead of
* N classes on-demand. But, this deals with namespacing and such for us.
*/
prototype = gjs_init_class_dynamic(context, in_object,
/* parent prototype JSObject* for
* prototype; NULL for
* Object.prototype
*/
NULL,
"GObject",
constructor_name,
&gjs_param_class,
/* constructor for instances (NULL for
* none - just name the prototype like
* Math - rarely correct)
*/
gjs_param_constructor,
/* number of constructor args */
0,
/* props of prototype */
&gjs_param_proto_props[0],
/* funcs of prototype */
&gjs_param_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
gjs_param_constructor_funcs);
if (prototype == NULL)
gjs_fatal("Can't init class %s", constructor_name);
constructor = NULL;
gjs_object_get_property(context, in_object, constructor_name, &value);
if (value != JSVAL_VOID) {
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "Property '%s' does not look like a constructor",
constructor_name);
return JS_FALSE;
}
}
constructor = JSVAL_TO_OBJECT(value);
value = OBJECT_TO_JSVAL(gjs_gtype_create_gtype_wrapper(context, G_TYPE_PARAM));
JS_DefineProperty(context, constructor, "$gtype", value,
NULL, NULL, JSPROP_PERMANENT);
if (prototype_p)
*prototype_p = prototype;
gjs_debug(GJS_DEBUG_GPARAM, "Defined class %s prototype is %p class %p in object %p",
constructor_name, prototype, JS_GET_CLASS(context, prototype), in_object);
return JS_TRUE;
}
static JSBool
do_import(JSContext *context,
JSObject *obj,
Importer *priv,
std::string &name)
{
std::string filename;
std::string full_path;
std::string dirname;
jsval search_path_val;
JSObject *search_path;
JSObject *module_obj = NULL;
uint32_t search_path_len;
uint32_t i;
JSBool result;
std::vector<std::string> directories;
jsid search_path_name;
bool exists;
search_path_name = gjs_context_get_const_string(context, GJS_STRING_SEARCH_PATH);
if (!gjs_object_require_property(context, obj, "importer", search_path_name, &search_path_val)) {
return JS_FALSE;
}
if (!search_path_val.isObject()) {
gjs_throw(context, "searchPath property on importer is not an object");
return JS_FALSE;
}
search_path = JSVAL_TO_OBJECT(search_path_val);
if (!JS_IsArrayObject(context, search_path)) {
gjs_throw(context, "searchPath property on importer is not an array");
return JS_FALSE;
}
if (!JS_GetArrayLength(context, search_path, &search_path_len)) {
gjs_throw(context, "searchPath array has no length");
return JS_FALSE;
}
result = JS_FALSE;
filename = std::string(name) + ".js";
/* First try importing an internal module like byteArray */
if (priv->is_root &&
gjs_is_registered_native_module(context, obj, name) &&
import_native_file(context, obj, name)) {
gjs_debug(GJS_DEBUG_IMPORTER,
"successfully imported module '%s'", name);
result = JS_TRUE;
goto out;
}
for (i = 0; i < search_path_len; ++i) {
jsval elem;
elem = JSVAL_VOID;
if (!JS_GetElement(context, search_path, i, &elem)) {
/* this means there was an exception, while elem == JSVAL_VOID
* means no element found
*/
goto out;
}
if (JSVAL_IS_VOID(elem))
continue;
if (!JSVAL_IS_STRING(elem)) {
gjs_throw(context, "importer searchPath contains non-string");
goto out;
}
if (!gjs_string_to_utf8(context, elem, dirname))
goto out; /* Error message already set */
/* Ignore empty path elements */
if (dirname[0] == '\0')
continue;
/* Try importing __init__.js and loading the symbol from it */
full_path = pathCombine(dirname, MODULE_INIT_FILENAME);
module_obj = load_module_init(context, obj, full_path);
if (module_obj != NULL) {
jsval obj_val;
if (JS_GetProperty(context,
module_obj,
name.c_str(),
&obj_val)) {
if (!JSVAL_IS_VOID(obj_val) &&
JS_DefineProperty(context, obj,
name.c_str(), obj_val,
NULL, NULL,
GJS_MODULE_PROP_FLAGS & ~JSPROP_PERMANENT)) {
result = JS_TRUE;
goto out;
}
}
}
/* Second try importing a directory (a sub-importer) */
full_path = pathCombine(dirname, name);
if (is_directory(full_path)) {
std::cout << "Adding directory '" << full_path << "' to child importer '" << name << "'\n",
directories.push_back(full_path);
}
/* If we just added to directories, we know we don't need to
* check for a file. If we added to directories on an earlier
* iteration, we want to ignore any files later in the
* path. So, always skip the rest of the loop block if we have
* directories.
*/
if (directories.size() > 0) {
continue;
}
/* Third, if it's not a directory, try importing a file */
full_path = pathCombine(dirname, filename);
std::cout << "full path: " << full_path << "\n";
exists = is_regular(full_path);
if (!exists) {
std::cout << "JS import '" << name << "' not found in " << dirname << "\n";
continue;
}
if (import_file_on_module (context, obj, name, full_path)) {
std::cout << "successfully imported module '" << name << "'\n";
result = JS_TRUE;
}
/* Don't keep searching path if we fail to load the file for
* reasons other than it doesn't exist... i.e. broken files
* block searching for nonbroken ones
*/
goto out;
}
if (directories.size() > 0) {
/* NULL-terminate the char** */
if (import_directory(context, obj, name, directories)) {
std::cout << "successfully imported directory '" << name << "'\n";
result = JS_TRUE;
}
}
out:
if (!result &&
!JS_IsExceptionPending(context)) {
/* If no exception occurred, the problem is just that we got to the
* end of the path. Be sure an exception is set.
*/
gjs_throw(context, "No JS module '%s' found in search path", name.c_str());
}
return result;
}
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;
}
static JSObject *
gjs_keep_alive_new(JSContext *context)
{
KeepAlive *priv;
bool found;
/* This function creates an unattached KeepAlive object; following our
* general strategy, we have a single KeepAlive class with a constructor
* stored on our single "load global" pseudo-global object, and we create
* instances with the load global as parent.
*/
g_assert(context != NULL);
JSAutoRequest ar(context);
JS::RootedObject global(context, gjs_get_import_global(context));
g_assert(global != NULL);
if (!JS_HasProperty(context, global, gjs_keep_alive_class.name, &found))
return NULL;
if (!found) {
JSObject *prototype;
gjs_debug(GJS_DEBUG_KEEP_ALIVE,
"Initializing keep-alive class in context %p global %p",
context, global.get());
prototype = JS_InitClass(context, global,
/* parent prototype JSObject* for
* prototype; NULL for
* Object.prototype
*/
JS::NullPtr(),
&gjs_keep_alive_class,
/* constructor for instances (NULL for
* none - just name the prototype like
* Math - rarely correct)
*/
gjs_keep_alive_constructor,
/* number of constructor args */
0,
/* props of prototype */
&gjs_keep_alive_proto_props[0],
/* funcs of prototype */
&gjs_keep_alive_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
NULL);
if (prototype == NULL)
g_error("Can't init class %s", gjs_keep_alive_class.name);
gjs_debug(GJS_DEBUG_KEEP_ALIVE, "Initialized class %s prototype %p",
gjs_keep_alive_class.name, prototype);
}
gjs_debug(GJS_DEBUG_KEEP_ALIVE,
"Creating new keep-alive object for context %p global %p",
context, global.get());
JS::RootedObject keep_alive(context,
JS_NewObject(context, &gjs_keep_alive_class, JS::NullPtr(), global));
if (keep_alive == NULL) {
gjs_log_exception(context);
g_error("Failed to create keep_alive object");
}
priv = g_slice_new0(KeepAlive);
priv->children = g_hash_table_new_full(child_hash, child_equal, NULL, child_free);
g_assert(priv_from_js(context, keep_alive) == NULL);
JS_SetPrivate(keep_alive, priv);
gjs_debug_lifecycle(GJS_DEBUG_KEEP_ALIVE,
"keep_alive constructor, obj %p priv %p",
keep_alive.get(), priv);
return keep_alive;
}
static JSBool
import_file(JSContext *context,
JSObject *obj,
const char *name,
const char *full_path)
{
char *script;
gsize script_len;
JSObject *module_obj;
GError *error;
jsval script_retval;
JSBool retval = JS_FALSE;
gjs_debug(GJS_DEBUG_IMPORTER,
"Importing '%s'", full_path);
module_obj = JS_NewObject(context, NULL, NULL, NULL);
if (module_obj == NULL) {
return JS_FALSE;
}
if (!define_import(context, obj, module_obj, name))
return JS_FALSE;
if (!define_meta_properties(context, module_obj, full_path, name, obj))
goto out;
script_len = 0;
error = NULL;
if (!(g_file_get_contents(full_path, &script, &script_len, &error))) {
if (!g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_ISDIR) &&
!g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_NOTDIR) &&
!g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
gjs_throw_g_error(context, error);
else
g_error_free(error);
goto out;
}
g_assert(script != NULL);
if (!JS_EvaluateScript(context,
module_obj,
script,
script_len,
full_path,
1, /* line number */
&script_retval)) {
g_free(script);
/* If JSOPTION_DONT_REPORT_UNCAUGHT is set then the exception
* would be left set after the evaluate and not go to the error
* reporter function.
*/
if (JS_IsExceptionPending(context)) {
gjs_debug(GJS_DEBUG_IMPORTER,
"Module '%s' left an exception set",
name);
gjs_log_and_keep_exception(context);
} else {
gjs_throw(context,
"JS_EvaluateScript() returned FALSE but did not set exception");
}
goto out;
}
g_free(script);
if (!finish_import(context, name))
goto out;
if (!seal_import(context, obj, name))
goto out;
retval = JS_TRUE;
out:
if (!retval)
cancel_import(context, obj, name);
return retval;
}
JSBool
gjs_define_fundamental_class(JSContext *context,
JSObject *in_object,
GIObjectInfo *info,
JSObject **constructor_p,
JSObject **prototype_p)
{
const char *constructor_name;
JSObject *prototype;
jsval value;
jsid js_constructor_name = JSID_VOID;
JSObject *parent_proto;
Fundamental *priv;
JSObject *constructor;
GType parent_gtype;
GType gtype;
GIFunctionInfo *constructor_info;
/* See the comment in gjs_define_object_class() for an explanation
* of how this all works; Fundamental is pretty much the same as
* Object.
*/
constructor_name = g_base_info_get_name((GIBaseInfo *) info);
constructor_info = find_fundamental_constructor(context, info,
&js_constructor_name);
gtype = g_registered_type_info_get_g_type (info);
parent_gtype = g_type_parent(gtype);
parent_proto = NULL;
if (parent_gtype != G_TYPE_INVALID)
parent_proto = gjs_lookup_fundamental_prototype_from_gtype(context,
parent_gtype);
if (!gjs_init_class_dynamic(context, in_object,
/* parent prototype JSObject* for
* prototype; NULL for
* Object.prototype
*/
parent_proto,
g_base_info_get_namespace((GIBaseInfo *) info),
constructor_name,
&gjs_fundamental_instance_class,
gjs_fundamental_instance_constructor,
/* number of constructor args (less can be passed) */
constructor_info != NULL ? g_callable_info_get_n_args((GICallableInfo *) constructor_info) : 0,
/* props of prototype */
parent_proto ? NULL : &gjs_fundamental_instance_proto_props[0],
/* funcs of prototype */
parent_proto ? NULL : &gjs_fundamental_instance_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
NULL,
&prototype,
&constructor)) {
gjs_log_exception(context);
g_error("Can't init class %s", constructor_name);
}
/* Put the info in the prototype */
priv = g_slice_new0(Fundamental);
g_assert(priv != NULL);
g_assert(priv->info == NULL);
priv->info = g_base_info_ref((GIBaseInfo *) info);
priv->gtype = gtype;
priv->constructor_name = js_constructor_name;
priv->constructor_info = constructor_info;
priv->ref_function = g_object_info_get_ref_function_pointer(info);
g_assert(priv->ref_function != NULL);
priv->unref_function = g_object_info_get_unref_function_pointer(info);
g_assert(priv->unref_function != NULL);
priv->set_value_function = g_object_info_get_set_value_function_pointer(info);
g_assert(priv->set_value_function != NULL);
priv->get_value_function = g_object_info_get_get_value_function_pointer(info);
g_assert(priv->get_value_function != NULL);
JS_SetPrivate(prototype, priv);
gjs_debug(GJS_DEBUG_GFUNDAMENTAL,
"Defined class %s prototype is %p class %p in object %p constructor %s.%s.%s",
constructor_name, prototype, JS_GetClass(prototype),
in_object,
constructor_info != NULL ? g_base_info_get_namespace(constructor_info) : "unknown",
constructor_info != NULL ? g_base_info_get_name(g_base_info_get_container(constructor_info)) : "unknown",
constructor_info != NULL ? g_base_info_get_name(constructor_info) : "unknown");
if (g_object_info_get_n_fields(priv->info) > 0) {
gjs_debug(GJS_DEBUG_GFUNDAMENTAL,
"Fundamental type '%s.%s' apparently has accessible fields. "
"Gjs has no support for this yet, ignoring these.",
g_base_info_get_namespace((GIBaseInfo *)priv->info),
g_base_info_get_name ((GIBaseInfo *)priv->info));
}
gjs_object_define_static_methods(context, constructor, gtype, info);
value = OBJECT_TO_JSVAL(gjs_gtype_create_gtype_wrapper(context, gtype));
JS_DefineProperty(context, constructor, "$gtype", value,
NULL, NULL, JSPROP_PERMANENT);
if (constructor_p)
*constructor_p = constructor;
if (prototype_p)
*prototype_p = prototype;
return JS_TRUE;
}
JSObject*
gjs_init_class_dynamic(JSContext *context,
JSObject *in_object,
JSObject *parent_proto,
const char *ns_name,
const char *class_name,
JSClass *clasp,
JSNative constructor,
uintN nargs,
JSPropertySpec *ps,
JSFunctionSpec *fs,
JSPropertySpec *static_ps,
JSFunctionSpec *static_fs)
{
jsval value;
char *private_name;
JSObject *prototype;
JSContext *load_context;
if (clasp->name != NULL) {
g_warning("Dynamic class should not have a name in the JSClass struct");
return NULL;
}
JS_BeginRequest(context);
/* We replace the passed-in context and global object with our
* runtime-global permanent load context. Otherwise, in a
* process with multiple contexts, we'd arbitrarily define
* the class in whatever global object initialized the
* class first, which is not desirable.
*/
load_context = gjs_runtime_get_load_context(JS_GetRuntime(context));
JS_BeginRequest(load_context);
/* JS_InitClass() wants to define the constructor in the global object, so
* we give it a private and namespaced name... passing in the namespace
* object instead of global object seems to break JS_ConstructObject()
* which then can't find the constructor for the class. I am probably
* missing something.
*/
private_name = g_strdup_printf("_private_%s_%s", ns_name, class_name);
prototype = NULL;
if (gjs_object_get_property(load_context, JS_GetGlobalObject(load_context),
private_name, &value) &&
JSVAL_IS_OBJECT(value)) {
jsval proto_val;
g_free(private_name); /* don't need it anymore */
if (!gjs_object_require_property(load_context, JSVAL_TO_OBJECT(value), NULL,
"prototype", &proto_val) ||
!JSVAL_IS_OBJECT(proto_val)) {
gjs_throw(load_context, "prototype was not defined or not an object?");
goto error;
}
prototype = JSVAL_TO_OBJECT(proto_val);
} else {
DynamicJSClass *class_copy;
RuntimeData *rd;
rd = get_data_from_context(load_context);
class_copy = g_slice_new0(DynamicJSClass);
class_copy->base = *clasp;
class_copy->base.name = private_name; /* Pass ownership of memory */
class_copy->static_class = clasp;
/* record the allocated class to be destroyed with the runtime and so
* we can do an IS_DYNAMIC_CLASS check
*/
g_hash_table_replace(rd->dynamic_classes,
class_copy, class_copy);
gjs_debug(GJS_DEBUG_GREPO,
"Initializing dynamic class %s %p",
class_name, class_copy);
prototype = JS_InitClass(load_context, JS_GetGlobalObject(load_context),
parent_proto, &class_copy->base,
constructor, nargs,
ps, fs,
static_ps, static_fs);
/* Retrieve the property again so we can define it in
* in_object
*/
if (!gjs_object_require_property(load_context, JS_GetGlobalObject(load_context), NULL,
class_copy->base.name, &value))
goto error;
}
g_assert(value != JSVAL_VOID);
g_assert(prototype != NULL);
/* Now manually define our constructor with a sane name, in the
* namespace object.
*/
if (!JS_DefineProperty(load_context, in_object,
class_name,
value,
NULL, NULL,
GJS_MODULE_PROP_FLAGS))
goto error;
JS_EndRequest(load_context);
JS_EndRequest(context);
return prototype;
error:
/* Move the exception to the calling context from load context.
*/
if (!gjs_move_exception(load_context, context)) {
/* set an exception since none was set */
gjs_throw(context, "No exception was set, but class initialize failed somehow");
}
JS_EndRequest(load_context);
JS_EndRequest(context);
return NULL;
}
/*
* See:
* https://bugzilla.mozilla.org/show_bug.cgi?id=166436
* https://bugzilla.mozilla.org/show_bug.cgi?id=215173
*
* Very surprisingly, jsapi.h lacks any way to "throw new Error()"
*
* So here is an awful hack inspired by
* http://egachine.berlios.de/embedding-sm-best-practice/embedding-sm-best-practice.html#error-handling
*/
static void
gjs_throw_valist(JSContext *context,
const char *error_class,
const char *format,
va_list args)
{
char *s;
JSBool result;
jsval v_constructor, v_message;
JSObject *err_obj;
s = g_strdup_vprintf(format, args);
JS_BeginRequest(context);
if (JS_IsExceptionPending(context)) {
/* Often it's unclear whether a given jsapi.h function
* will throw an exception, so we will throw ourselves
* "just in case"; in those cases, we don't want to
* overwrite an exception that already exists.
* (Do log in case our second exception adds more info,
* but don't log as topic ERROR because if the exception is
* caught we don't want an ERROR in the logs.)
*/
gjs_debug(GJS_DEBUG_CONTEXT,
"Ignoring second exception: '%s'",
s);
g_free(s);
JS_EndRequest(context);
return;
}
result = JS_FALSE;
(void)JS_EnterLocalRootScope(context);
if (!gjs_string_from_utf8(context, s, -1, &v_message)) {
JS_ReportError(context, "Failed to copy exception string");
goto out;
}
if (!gjs_object_get_property(context, JS_GetGlobalObject(context),
error_class, &v_constructor)) {
JS_ReportError(context, "??? Missing Error constructor in global object?");
goto out;
}
/* throw new Error(message) */
err_obj = JS_New(context, JSVAL_TO_OBJECT(v_constructor), 1, &v_message);
JS_SetPendingException(context, OBJECT_TO_JSVAL(err_obj));
result = JS_TRUE;
out:
JS_LeaveLocalRootScope(context);
if (!result) {
/* try just reporting it to error handler? should not
* happen though pretty much
*/
JS_ReportError(context,
"Failed to throw exception '%s'",
s);
}
g_free(s);
JS_EndRequest(context);
}
JSBool
gjs_define_boxed_class(JSContext *context,
JSObject *in_object,
GIBoxedInfo *info,
JSObject **constructor_p,
JSObject **prototype_p)
{
const char *constructor_name;
JSObject *prototype;
JSObject *constructor;
jsval value;
Boxed *priv;
/* See the comment in gjs_define_object_class() for an
* explanation of how this all works; Boxed is pretty much the
* same as Object.
*/
constructor_name = g_base_info_get_name( (GIBaseInfo*) info);
if (gjs_object_get_property(context, in_object, constructor_name, &value)) {
JSObject *constructor;
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "Existing property '%s' does not look like a constructor",
constructor_name);
return JS_FALSE;
}
constructor = JSVAL_TO_OBJECT(value);
gjs_object_get_property(context, constructor, "prototype", &value);
if (!JSVAL_IS_OBJECT(value)) {
gjs_throw(context, "boxed %s prototype property does not appear to exist or has wrong type", constructor_name);
return JS_FALSE;
} else {
if (prototype_p)
*prototype_p = JSVAL_TO_OBJECT(value);
if (constructor_p)
*constructor_p = constructor;
return JS_TRUE;
}
}
if (!gjs_init_class_dynamic(context, in_object,
NULL, /* parent prototype */
g_base_info_get_namespace( (GIBaseInfo*) info),
constructor_name,
&gjs_boxed_class,
gjs_boxed_constructor, 1,
/* props of prototype */
&gjs_boxed_proto_props[0],
/* funcs of prototype */
&gjs_boxed_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
NULL,
&prototype,
&constructor)) {
gjs_log_exception(context, NULL);
gjs_fatal("Can't init class %s", constructor_name);
}
GJS_INC_COUNTER(boxed);
priv = g_slice_new0(Boxed);
priv->info = info;
boxed_fill_prototype_info(priv);
g_base_info_ref( (GIBaseInfo*) priv->info);
priv->gtype = g_registered_type_info_get_g_type ((GIRegisteredTypeInfo*) priv->info);
JS_SetPrivate(context, prototype, priv);
gjs_debug(GJS_DEBUG_GBOXED, "Defined class %s prototype is %p class %p in object %p",
constructor_name, prototype, JS_GET_CLASS(context, prototype), in_object);
priv->can_allocate_directly = struct_is_simple (priv->info);
define_boxed_class_fields (context, priv, prototype);
gjs_define_static_methods (context, constructor, priv->gtype, priv->info);
value = OBJECT_TO_JSVAL(gjs_gtype_create_gtype_wrapper(context, priv->gtype));
JS_DefineProperty(context, constructor, "$gtype", value,
NULL, NULL, JSPROP_PERMANENT);
if (constructor_p)
*constructor_p = constructor;
if (prototype_p)
*prototype_p = prototype;
return JS_TRUE;
}
/*
* Like JSResolveOp, but flags provide contextual information as follows:
*
* JSRESOLVE_QUALIFIED a qualified property id: obj.id or obj[id], not id
* JSRESOLVE_ASSIGNING obj[id] is on the left-hand side of an assignment
* JSRESOLVE_DETECTING 'if (o.p)...' or similar detection opcode sequence
* JSRESOLVE_DECLARING var, const, or boxed prolog declaration opcode
* JSRESOLVE_CLASSNAME class name used when constructing
*
* The *objp out parameter, on success, should be null to indicate that id
* was not resolved; and non-null, referring to obj or one of its prototypes,
* if id was resolved.
*/
static JSBool
boxed_new_resolve(JSContext *context,
JSObject *obj,
jsid id,
unsigned flags,
JSObject **objp)
{
Boxed *priv;
char *name;
JSBool ret = JS_FALSE;
*objp = NULL;
if (!gjs_get_string_id(context, id, &name))
return JS_TRUE; /* not resolved, but no error */
priv = priv_from_js(context, obj);
gjs_debug_jsprop(GJS_DEBUG_GBOXED, "Resolve prop '%s' hook obj %p priv %p", name, obj, priv);
if (priv == NULL)
goto out; /* wrong class */
if (priv->gboxed == NULL) {
/* We are the prototype, so look for methods and other class properties */
GIFunctionInfo *method_info;
method_info = g_struct_info_find_method((GIStructInfo*) priv->info,
name);
if (method_info != NULL) {
JSObject *boxed_proto;
const char *method_name;
#if GJS_VERBOSE_ENABLE_GI_USAGE
_gjs_log_info_usage((GIBaseInfo*) method_info);
#endif
method_name = g_base_info_get_name( (GIBaseInfo*) method_info);
gjs_debug(GJS_DEBUG_GBOXED,
"Defining method %s in prototype for %s.%s",
method_name,
g_base_info_get_namespace( (GIBaseInfo*) priv->info),
g_base_info_get_name( (GIBaseInfo*) priv->info));
boxed_proto = obj;
if (gjs_define_function(context, boxed_proto, priv->gtype,
(GICallableInfo *)method_info) == NULL) {
g_base_info_unref( (GIBaseInfo*) method_info);
goto out;
}
*objp = boxed_proto; /* we defined the prop in object_proto */
g_base_info_unref( (GIBaseInfo*) method_info);
}
} else {
/* We are an instance, not a prototype, so look for
* per-instance props that we want to define on the
* JSObject. Generally we do not want to cache these in JS, we
* want to always pull them from the C object, or JS would not
* see any changes made from C. So we use the get/set prop
* hooks, not this resolve hook.
*/
}
ret = JS_TRUE;
out:
g_free(name);
return ret;
}
/*
* See:
* https://bugzilla.mozilla.org/show_bug.cgi?id=166436
* https://bugzilla.mozilla.org/show_bug.cgi?id=215173
*
* Very surprisingly, jsapi.h lacks any way to "throw new Error()"
*
* So here is an awful hack inspired by
* http://egachine.berlios.de/embedding-sm-best-practice/embedding-sm-best-practice.html#error-handling
*/
static void
gjs_throw_valist(JSContext *context,
const char *format,
va_list args)
{
char *s;
jsval retval;
jsval argv[1];
JSFunction *func;
const char *body;
JSBool result;
const char *names[] = { "message" };
guint options;
s = g_strdup_vprintf(format, args);
JS_BeginRequest(context);
if (JS_IsExceptionPending(context)) {
/* Often it's unclear whether a given jsapi.h function
* will throw an exception, so we will throw ourselves
* "just in case"; in those cases, we don't want to
* overwrite an exception that already exists.
* (Do log in case our second exception adds more info,
* but don't log as topic ERROR because if the exception is
* caught we don't want an ERROR in the logs.)
*/
gjs_debug(GJS_DEBUG_CONTEXT,
"Ignoring second exception: '%s'",
s);
g_free(s);
return;
}
result = JS_FALSE;
JS_EnterLocalRootScope(context);
if (!gjs_string_from_utf8(context, s, -1, &argv[0])) {
JS_ReportError(context, "Failed to copy exception string");
goto out;
}
body = "throw new Error(message);";
func = JS_CompileFunction(context,
JS_GetGlobalObject(context), /* parent object (scope chain) */
NULL, /* name of function if we wanted to define it in parent */
1, /* nargs */
&names[0], /* array of arg names if we had args */
body,
strlen(body),
"gjs_throw", /* file */
0); /* line */
if (func == NULL) {
JS_ReportError(context, "Failed to compile function");
goto out;
}
/* we need JS_CallFunctionValue() to leave the exception set */
options = JS_GetOptions(context);
if (!(options & JSOPTION_DONT_REPORT_UNCAUGHT)) {
JS_SetOptions(context, options | JSOPTION_DONT_REPORT_UNCAUGHT);
}
retval = JSVAL_VOID;
/* note the return value is whether function succeeded, which it shouldn't, since it
* throws...
*/
JS_CallFunctionValue(context,
JS_GetGlobalObject(context),
OBJECT_TO_JSVAL(JS_GetFunctionObject(func)),
1, &argv[0],
&retval);
if (!(options & JSOPTION_DONT_REPORT_UNCAUGHT)) {
JS_SetOptions(context, options);
}
if (!JS_IsExceptionPending(context)) {
JS_ReportError(context,
"Failed to set exception by calling our exception-setting function");
goto out;
}
result = JS_TRUE;
out:
JS_LeaveLocalRootScope(context);
if (!result) {
/* try just reporting it to error handler? should not
* happen though pretty much
*/
JS_ReportError(context,
"Failed to throw exception '%s'",
s);
}
g_free(s);
JS_EndRequest(context);
}
JSObject*
gjs_init_class_dynamic(JSContext *context,
JSObject *in_object,
JSObject *parent_proto,
const char *ns_name,
const char *class_name,
JSClass *clasp,
JSNative constructor,
uintN nargs,
JSPropertySpec *ps,
JSFunctionSpec *fs,
JSPropertySpec *static_ps,
JSFunctionSpec *static_fs)
{
jsval value;
char *private_name;
JSObject *global;
JSObject *prototype;
if (clasp->name != NULL) {
g_warning("Dynamic class should not have a name in the JSClass struct");
return NULL;
}
JS_BeginRequest(context);
/* We use a special "fake" global object to store our constructors
* in for future use. Using the actual global object of the context would
* result in different contexts having different class definitions for
* the same GObject class; since the proxies are shared between all
* contexts, this would produce confusing results.
*/
global = gjs_get_import_global(context);
/* JS_InitClass() wants to define the constructor in the global object, so
* we give it a private and namespaced name... passing in the namespace
* object instead of global object seems to break JS_ConstructObject()
* which then can't find the constructor for the class. I am probably
* missing something.
*/
private_name = g_strdup_printf("_private_%s_%s", ns_name, class_name);
prototype = NULL;
if (gjs_object_get_property(context, global,
private_name, &value) &&
JSVAL_IS_OBJECT(value)) {
jsval proto_val;
g_free(private_name); /* don't need it anymore */
if (!gjs_object_require_property(context, JSVAL_TO_OBJECT(value), NULL,
"prototype", &proto_val) ||
!JSVAL_IS_OBJECT(proto_val)) {
gjs_throw(context, "prototype was not defined or not an object?");
goto error;
}
prototype = JSVAL_TO_OBJECT(proto_val);
} else {
DynamicJSClass *class_copy;
RuntimeData *rd;
rd = get_data_from_context(context);
class_copy = g_slice_new0(DynamicJSClass);
class_copy->base = *clasp;
class_copy->base.name = private_name; /* Pass ownership of memory */
class_copy->static_class = clasp;
/* record the allocated class to be destroyed with the runtime and so
* we can do an IS_DYNAMIC_CLASS check
*/
g_hash_table_replace(rd->dynamic_classes,
class_copy, class_copy);
gjs_debug(GJS_DEBUG_GREPO,
"Initializing dynamic class %s %p",
class_name, class_copy);
prototype = JS_InitClass(context, global,
parent_proto, &class_copy->base,
constructor, nargs,
ps, fs,
static_ps, static_fs);
if (prototype == NULL)
goto error;
/* Retrieve the property again so we can define it in
* in_object
*/
if (!gjs_object_require_property(context, global, NULL,
class_copy->base.name, &value))
goto error;
}
g_assert(!JSVAL_IS_VOID(value));
g_assert(prototype != NULL);
/* Now manually define our constructor with a sane name, in the
* namespace object.
*/
if (!JS_DefineProperty(context, in_object,
class_name,
value,
NULL, NULL,
GJS_MODULE_PROP_FLAGS))
goto error;
JS_EndRequest(context);
return prototype;
error:
JS_EndRequest(context);
return NULL;
}
static JSObject *
load_module_init(JSContext *context,
JSObject *in_object,
const char *full_path)
{
char *script;
gsize script_len;
jsval script_retval;
JSObject *module_obj;
GError *error;
JSBool found;
jsid module_init_name;
/* First we check if js module has already been loaded */
module_init_name = gjs_runtime_get_const_string(JS_GetRuntime(context),
GJS_STRING_MODULE_INIT);
if (JS_HasPropertyById(context, in_object, module_init_name, &found) && found) {
jsval module_obj_val;
if (JS_GetPropertyById(context,
in_object,
module_init_name,
&module_obj_val)) {
return JSVAL_TO_OBJECT(module_obj_val);
}
}
module_obj = JS_NewObject(context, NULL, NULL, NULL);
if (module_obj == NULL) {
return JS_FALSE;
}
/* https://bugzilla.mozilla.org/show_bug.cgi?id=599651 means we
* can't just pass in the global as the parent */
JS_SetParent(context, module_obj,
gjs_get_import_global (context));
/* Define module in importer for future use and to avoid module_obj
* object to be garbage collected during the evaluation of the script */
JS_DefinePropertyById(context, in_object,
module_init_name, OBJECT_TO_JSVAL(module_obj),
NULL, NULL,
GJS_MODULE_PROP_FLAGS & ~JSPROP_PERMANENT);
script_len = 0;
error = NULL;
if (!g_file_get_contents(full_path, &script, &script_len, &error)) {
if (!g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_ISDIR) &&
!g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_NOTDIR) &&
!g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
gjs_throw_g_error(context, error);
else
g_error_free(error);
return NULL;
}
g_assert(script != NULL);
gjs_debug(GJS_DEBUG_IMPORTER, "Importing %s", full_path);
if (!JS_EvaluateScript(context,
module_obj,
script,
script_len,
full_path,
1, /* line number */
&script_retval)) {
g_free(script);
/* If JSOPTION_DONT_REPORT_UNCAUGHT is set then the exception
* would be left set after the evaluate and not go to the error
* reporter function.
*/
if (JS_IsExceptionPending(context)) {
gjs_debug(GJS_DEBUG_IMPORTER,
"Module " MODULE_INIT_FILENAME " left an exception set");
gjs_log_and_keep_exception(context);
} else {
gjs_throw(context,
"JS_EvaluateScript() returned FALSE but did not set exception");
}
return NULL;
}
g_free(script);
return module_obj;
}
static void
closure_marshal(GClosure *closure,
GValue *return_value,
guint n_param_values,
const GValue *param_values,
gpointer invocation_hint,
gpointer marshal_data)
{
JSRuntime *runtime;
JSContext *context;
int argc;
jsval *argv;
jsval rval;
int i;
GSignalQuery signal_query = { 0, };
gjs_debug_marshal(GJS_DEBUG_GCLOSURE,
"Marshal closure %p",
closure);
if (!gjs_closure_is_valid(closure)) {
/* We were destroyed; become a no-op */
return;
}
runtime = gjs_closure_get_runtime(closure);
context = gjs_runtime_get_current_context(runtime);
JS_BeginRequest(context);
argc = n_param_values;
argv = g_newa(jsval, n_param_values);
rval = JSVAL_VOID;
gjs_set_values(context, argv, argc, JSVAL_VOID);
gjs_root_value_locations(context, argv, argc);
JS_AddValueRoot(context, &rval);
if (marshal_data) {
/* we are used for a signal handler */
guint signal_id;
signal_id = GPOINTER_TO_UINT(marshal_data);
g_signal_query(signal_id, &signal_query);
if (!signal_query.signal_id) {
gjs_debug(GJS_DEBUG_GCLOSURE,
"Signal handler being called on invalid signal");
goto cleanup;
}
if (signal_query.n_params + 1 != n_param_values) {
gjs_debug(GJS_DEBUG_GCLOSURE,
"Signal handler being called with wrong number of parameters");
goto cleanup;
}
}
for (i = 0; i < argc; ++i) {
const GValue *gval = ¶m_values[i];
gboolean no_copy;
no_copy = FALSE;
if (i >= 1 && signal_query.signal_id) {
no_copy = (signal_query.param_types[i - 1] & G_SIGNAL_TYPE_STATIC_SCOPE) != 0;
}
if (!gjs_value_from_g_value_internal(context, &argv[i], gval, no_copy, &signal_query, i)) {
gjs_debug(GJS_DEBUG_GCLOSURE,
"Unable to convert arg %d in order to invoke closure",
i);
gjs_log_exception(context, NULL);
goto cleanup;
}
}
gjs_closure_invoke(closure, argc, argv, &rval);
if (return_value != NULL) {
if (JSVAL_IS_VOID(rval)) {
/* something went wrong invoking, error should be set already */
goto cleanup;
}
if (!gjs_value_to_g_value(context, rval, return_value)) {
gjs_debug(GJS_DEBUG_GCLOSURE,
"Unable to convert return value when invoking closure");
gjs_log_exception(context, NULL);
goto cleanup;
}
}
cleanup:
gjs_unroot_value_locations(context, argv, argc);
JS_RemoveValueRoot(context, &rval);
JS_EndRequest(context);
}
static JSBool
do_import(JSContext *context,
JSObject *obj,
Importer *priv,
const char *name)
{
char *filename;
char *full_path;
char *dirname = NULL;
jsval search_path_val;
JSObject *search_path;
JSObject *module_obj = NULL;
guint32 search_path_len;
guint32 i;
JSBool result;
GPtrArray *directories;
jsid search_path_name;
search_path_name = gjs_runtime_get_const_string(JS_GetRuntime(context),
GJS_STRING_SEARCH_PATH);
if (!gjs_object_require_property(context, obj, "importer", search_path_name, &search_path_val)) {
return JS_FALSE;
}
if (!JSVAL_IS_OBJECT(search_path_val)) {
gjs_throw(context, "searchPath property on importer is not an object");
return JS_FALSE;
}
search_path = JSVAL_TO_OBJECT(search_path_val);
if (!JS_IsArrayObject(context, search_path)) {
gjs_throw(context, "searchPath property on importer is not an array");
return JS_FALSE;
}
if (!JS_GetArrayLength(context, search_path, &search_path_len)) {
gjs_throw(context, "searchPath array has no length");
return JS_FALSE;
}
result = JS_FALSE;
filename = g_strdup_printf("%s.js", name);
full_path = NULL;
directories = NULL;
/* First try importing an internal module like byteArray */
if (priv->is_root &&
gjs_is_registered_native_module(context, obj, name) &&
import_native_file(context, obj, name)) {
gjs_debug(GJS_DEBUG_IMPORTER,
"successfully imported module '%s'", name);
result = JS_TRUE;
goto out;
}
for (i = 0; i < search_path_len; ++i) {
jsval elem;
elem = JSVAL_VOID;
if (!JS_GetElement(context, search_path, i, &elem)) {
/* this means there was an exception, while elem == JSVAL_VOID
* means no element found
*/
goto out;
}
if (JSVAL_IS_VOID(elem))
continue;
if (!JSVAL_IS_STRING(elem)) {
gjs_throw(context, "importer searchPath contains non-string");
goto out;
}
g_free(dirname);
dirname = NULL;
if (!gjs_string_to_utf8(context, elem, &dirname))
goto out; /* Error message already set */
/* Ignore empty path elements */
if (dirname[0] == '\0')
continue;
/* Try importing __init__.js and loading the symbol from it */
if (full_path)
g_free(full_path);
full_path = g_build_filename(dirname, MODULE_INIT_FILENAME,
NULL);
module_obj = load_module_init(context, obj, full_path);
if (module_obj != NULL) {
jsval obj_val;
if (JS_GetProperty(context,
module_obj,
name,
&obj_val)) {
if (!JSVAL_IS_VOID(obj_val) &&
JS_DefineProperty(context, obj,
name, obj_val,
NULL, NULL,
GJS_MODULE_PROP_FLAGS & ~JSPROP_PERMANENT)) {
result = JS_TRUE;
goto out;
}
}
}
/* Second try importing a directory (a sub-importer) */
if (full_path)
g_free(full_path);
full_path = g_build_filename(dirname, name,
NULL);
if (g_file_test(full_path, G_FILE_TEST_IS_DIR)) {
gjs_debug(GJS_DEBUG_IMPORTER,
"Adding directory '%s' to child importer '%s'",
full_path, name);
if (directories == NULL) {
directories = g_ptr_array_new();
}
g_ptr_array_add(directories, full_path);
/* don't free it twice - pass ownership to ptr array */
full_path = NULL;
}
/* If we just added to directories, we know we don't need to
* check for a file. If we added to directories on an earlier
* iteration, we want to ignore any files later in the
* path. So, always skip the rest of the loop block if we have
* directories.
*/
if (directories != NULL) {
continue;
}
/* Third, if it's not a directory, try importing a file */
g_free(full_path);
full_path = g_build_filename(dirname, filename,
NULL);
if (g_file_test(full_path, G_FILE_TEST_EXISTS)) {
if (import_file(context, obj, name, full_path)) {
gjs_debug(GJS_DEBUG_IMPORTER,
"successfully imported module '%s'", name);
result = JS_TRUE;
}
/* Don't keep searching path if we fail to load the file for
* reasons other than it doesn't exist... i.e. broken files
* block searching for nonbroken ones
*/
goto out;
}
gjs_debug(GJS_DEBUG_IMPORTER,
"JS import '%s' not found in %s",
name, dirname);
}
if (directories != NULL) {
/* NULL-terminate the char** */
g_ptr_array_add(directories, NULL);
if (import_directory(context, obj, name,
(const char**) directories->pdata)) {
gjs_debug(GJS_DEBUG_IMPORTER,
"successfully imported directory '%s'", name);
result = JS_TRUE;
}
}
out:
if (directories != NULL) {
char **str_array;
/* NULL-terminate the char**
* (maybe for a second time, but doesn't matter)
*/
g_ptr_array_add(directories, NULL);
str_array = (char**) directories->pdata;
g_ptr_array_free(directories, FALSE);
g_strfreev(str_array);
}
g_free(full_path);
g_free(filename);
g_free(dirname);
if (!result &&
!JS_IsExceptionPending(context)) {
/* If no exception occurred, the problem is just that we got to the
* end of the path. Be sure an exception is set.
*/
gjs_throw(context, "No JS module '%s' found in search path", name);
}
return result;
}
JSObject*
gjs_keep_alive_new(JSContext *context)
{
JSObject *keep_alive;
JSObject *global;
g_assert(context != NULL);
JS_BeginRequest(context);
/* put constructor in the global namespace */
global = JS_GetGlobalObject(context);
g_assert(global != NULL);
if (!gjs_object_has_property(context, global, gjs_keep_alive_class.name)) {
JSObject *prototype;
gjs_debug(GJS_DEBUG_KEEP_ALIVE,
"Initializing keep-alive class in context %p global %p",
context, global);
prototype = JS_InitClass(context, global,
/* parent prototype JSObject* for
* prototype; NULL for
* Object.prototype
*/
NULL,
&gjs_keep_alive_class,
/* constructor for instances (NULL for
* none - just name the prototype like
* Math - rarely correct)
*/
keep_alive_constructor,
/* number of constructor args */
0,
/* props of prototype */
&gjs_keep_alive_proto_props[0],
/* funcs of prototype */
&gjs_keep_alive_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
NULL);
if (prototype == NULL)
gjs_fatal("Can't init class %s", gjs_keep_alive_class.name);
g_assert(gjs_object_has_property(context, global, gjs_keep_alive_class.name));
gjs_debug(GJS_DEBUG_KEEP_ALIVE, "Initialized class %s prototype %p",
gjs_keep_alive_class.name, prototype);
}
gjs_debug(GJS_DEBUG_KEEP_ALIVE,
"Creating new keep-alive object for context %p global %p",
context, global);
/* Without the "global" parent object, this craters inside of
* xulrunner because in jsobj.c:js_ConstructObject it looks up
* VOID as the constructor. Exploring in gdb, it is walking up
* the scope chain in a way that involves scary xpconnect-looking
* stuff. Having "global" as parent seems to fix it. But, it would
* not hurt to understand this better.
*/
keep_alive = JS_ConstructObject(context, &gjs_keep_alive_class, NULL, global);
if (keep_alive == NULL) {
gjs_log_exception(context, NULL);
gjs_fatal("Failed to create keep_alive object");
}
JS_EndRequest(context);
return keep_alive;
}
/*
* Like JSResolveOp, but flags provide contextual information as follows:
*
* JSRESOLVE_QUALIFIED a qualified property id: obj.id or obj[id], not id
* JSRESOLVE_ASSIGNING obj[id] is on the left-hand side of an assignment
* JSRESOLVE_DETECTING 'if (o.p)...' or similar detection opcode sequence
* JSRESOLVE_DECLARING var, const, or fundamental prolog declaration opcode
* JSRESOLVE_CLASSNAME class name used when constructing
*
* The *objp out parameter, on success, should be null to indicate that id
* was not resolved; and non-null, referring to obj or one of its prototypes,
* if id was resolved.
*/
static JSBool
fundamental_instance_new_resolve(JSContext *context,
JS::HandleObject obj,
JS::HandleId id,
unsigned flags,
JS::MutableHandleObject objp)
{
FundamentalInstance *priv;
char *name;
JSBool ret = JS_FALSE;
if (!gjs_get_string_id(context, id, &name))
return JS_TRUE; /* not resolved, but no error */
priv = priv_from_js(context, obj);
gjs_debug_jsprop(GJS_DEBUG_GFUNDAMENTAL, "Resolve prop '%s' hook obj %p priv %p", name, *obj, priv);
if (priv == NULL)
goto out; /* wrong class */
if (priv->prototype == NULL) {
/* We are the prototype, so look for methods and other class properties */
Fundamental *proto_priv = (Fundamental *) priv;
GIFunctionInfo *method_info;
method_info = g_object_info_find_method((GIStructInfo*) proto_priv->info,
name);
if (method_info != NULL) {
const char *method_name;
#if GJS_VERBOSE_ENABLE_GI_USAGE
_gjs_log_info_usage((GIBaseInfo *) method_info);
#endif
if (g_function_info_get_flags (method_info) & GI_FUNCTION_IS_METHOD) {
method_name = g_base_info_get_name((GIBaseInfo *) method_info);
/* we do not define deprecated methods in the prototype */
if (g_base_info_is_deprecated((GIBaseInfo *) method_info)) {
gjs_debug(GJS_DEBUG_GFUNDAMENTAL,
"Ignoring definition of deprecated method %s in prototype %s.%s",
method_name,
g_base_info_get_namespace((GIBaseInfo *) proto_priv->info),
g_base_info_get_name((GIBaseInfo *) proto_priv->info));
g_base_info_unref((GIBaseInfo *) method_info);
ret = JS_TRUE;
goto out;
}
gjs_debug(GJS_DEBUG_GFUNDAMENTAL,
"Defining method %s in prototype for %s.%s",
method_name,
g_base_info_get_namespace((GIBaseInfo *) proto_priv->info),
g_base_info_get_name((GIBaseInfo *) proto_priv->info));
if (gjs_define_function(context, obj, proto_priv->gtype,
method_info) == NULL) {
g_base_info_unref((GIBaseInfo *) method_info);
goto out;
}
objp.set(obj);
}
g_base_info_unref((GIBaseInfo *) method_info);
}
ret = fundamental_instance_new_resolve_interface(context, obj, objp,
proto_priv, name);
} else {
/* We are an instance, not a prototype, so look for
* per-instance props that we want to define on the
* JSObject. Generally we do not want to cache these in JS, we
* want to always pull them from the C object, or JS would not
* see any changes made from C. So we use the get/set prop
* hooks, not this resolve hook.
*/
}
ret = JS_TRUE;
out:
g_free(name);
return ret;
}
gboolean
gjs_context_eval(GjsContext *js_context,
const char *script,
gssize script_len,
const char *filename,
int *exit_status_p,
GError **error)
{
int line_number;
jsval retval;
gboolean success;
gunichar2 *u16_script;
glong u16_script_len;
g_object_ref(G_OBJECT(js_context));
if (exit_status_p)
*exit_status_p = 1; /* "Failure" (like a shell script) */
/* whether we evaluated the script OK; not related to whether
* script returned nonzero. We set GError if success = FALSE
*/
success = TRUE;
/* handle scripts with UNIX shebangs */
line_number = 1;
if (script != NULL && script[0] == '#' && script[1] == '!') {
const char *s;
s = (const char *) strstr (script, "\n");
if (s != NULL) {
if (script_len > 0)
script_len -= (s + 1 - script);
script = s + 1;
line_number = 2;
}
}
if ((u16_script = g_utf8_to_utf16 (script, script_len, NULL, &u16_script_len, error)) == NULL)
return FALSE;
g_assert (u16_script_len < G_MAXUINT);
/* log and clear exception if it's set (should not be, normally...) */
if (gjs_log_exception(js_context->context,
NULL)) {
gjs_debug(GJS_DEBUG_CONTEXT,
"Exception was set prior to JS_EvaluateScript()");
}
/* JS_EvaluateScript requires a request even though it sort of seems like
* it means we're always in a request?
*/
gjs_runtime_push_context(js_context->runtime, js_context->context);
JS_BeginRequest(js_context->context);
retval = JSVAL_VOID;
if (!JS_EvaluateUCScript(js_context->context,
js_context->global,
(const jschar*)u16_script,
(guint) u16_script_len,
filename,
line_number,
&retval)) {
char *message;
gjs_debug(GJS_DEBUG_CONTEXT,
"Script evaluation failed");
/* if message is NULL then somehow exception wasn't set */
message = NULL;
gjs_log_exception(js_context->context,
&message);
if (message) {
g_set_error(error,
GJS_ERROR,
GJS_ERROR_FAILED,
"%s", message);
g_free(message);
} else {
gjs_debug(GJS_DEBUG_CONTEXT,
"JS_EvaluateScript() failed but no exception message?");
g_set_error(error,
GJS_ERROR,
GJS_ERROR_FAILED,
"JS_EvaluateScript() failed but no exception message?");
}
success = FALSE;
}
g_free (u16_script);
gjs_debug(GJS_DEBUG_CONTEXT,
"Script evaluation succeeded");
if (gjs_log_exception(js_context->context, NULL)) {
g_set_error(error,
GJS_ERROR,
GJS_ERROR_FAILED,
"Exception was set even though JS_EvaluateScript() returned true - did you gjs_throw() but not return false somewhere perhaps?");
success = FALSE;
}
if (success && exit_status_p) {
if (JSVAL_IS_INT(retval)) {
int code;
if (JS_ValueToInt32(js_context->context, retval, &code)) {
gjs_debug(GJS_DEBUG_CONTEXT,
"Script returned integer code %d", code);
*exit_status_p = code;
}
} else {
/* Assume success if no integer was returned */
*exit_status_p = 0;
}
}
JS_EndRequest(js_context->context);
gjs_runtime_pop_context(js_context->runtime);
g_object_unref(G_OBJECT(js_context));
return success;
}
JSObject*
gjs_keep_alive_new(JSContext *context)
{
JSObject *keep_alive;
JSObject *global;
/* This function creates an unattached KeepAlive object; following our
* general strategy, we have a single KeepAlive class with a constructor
* stored on our single "load global" pseudo-global object, and we create
* instances with the load global as parent.
*/
g_assert(context != NULL);
JS_BeginRequest(context);
global = gjs_get_import_global(context);
g_assert(global != NULL);
if (!gjs_object_has_property(context, global, gjs_keep_alive_class.name)) {
JSObject *prototype;
gjs_debug(GJS_DEBUG_KEEP_ALIVE,
"Initializing keep-alive class in context %p global %p",
context, global);
prototype = JS_InitClass(context, global,
/* parent prototype JSObject* for
* prototype; NULL for
* Object.prototype
*/
NULL,
&gjs_keep_alive_class,
/* constructor for instances (NULL for
* none - just name the prototype like
* Math - rarely correct)
*/
gjs_keep_alive_constructor,
/* number of constructor args */
0,
/* props of prototype */
&gjs_keep_alive_proto_props[0],
/* funcs of prototype */
&gjs_keep_alive_proto_funcs[0],
/* props of constructor, MyConstructor.myprop */
NULL,
/* funcs of constructor, MyConstructor.myfunc() */
NULL);
if (prototype == NULL)
gjs_fatal("Can't init class %s", gjs_keep_alive_class.name);
g_assert(gjs_object_has_property(context, global, gjs_keep_alive_class.name));
gjs_debug(GJS_DEBUG_KEEP_ALIVE, "Initialized class %s prototype %p",
gjs_keep_alive_class.name, prototype);
}
gjs_debug(GJS_DEBUG_KEEP_ALIVE,
"Creating new keep-alive object for context %p global %p",
context, global);
keep_alive = JS_ConstructObject(context, &gjs_keep_alive_class, NULL, global);
if (keep_alive == NULL) {
gjs_log_exception(context, NULL);
gjs_fatal("Failed to create keep_alive object");
}
JS_EndRequest(context);
return keep_alive;
}
static JSBool
log_and_maybe_keep_exception(JSContext *context,
char **message_p,
gboolean keep)
{
jsval exc = JSVAL_VOID;
JSString *s;
char *message;
JSBool retval = JS_FALSE;
JS_BeginRequest(context);
if (message_p)
*message_p = NULL;
JS_AddRoot(context, &exc);
if (!JS_GetPendingException(context, &exc))
goto out;
JS_ClearPendingException(context);
s = JS_ValueToString(context, exc);
if (s == NULL) {
gjs_debug(GJS_DEBUG_ERROR,
"Failed to convert exception to string");
goto out; /* Exception should be thrown already */
}
if (!gjs_string_to_utf8(context, STRING_TO_JSVAL(s), &message)) {
gjs_debug(GJS_DEBUG_ERROR,
"Failed to convert exception string to UTF-8");
goto out; /* Error already set */
}
gjs_debug(GJS_DEBUG_ERROR,
"Exception was: %s",
message);
if (message_p) {
*message_p = message;
} else {
g_free(message);
}
gjs_log_exception_props(context, exc);
/* We clear above and then set it back so any exceptions
* from the logging process don't overwrite the original
*/
if (keep)
JS_SetPendingException(context, exc);
retval = JS_TRUE;
out:
JS_RemoveRoot(context, &exc);
JS_EndRequest(context);
return retval;
}
