// Check extension/with/global object.
if (context->has_extension()) {
- Handle<JSObject> extension = Handle<JSObject>(context->extension(),
- isolate);
- // Context extension objects needs to behave as if they have no
- // prototype. So even if we want to follow prototype chains, we
- // need to only do a local lookup for context extension objects.
- if ((flags & FOLLOW_PROTOTYPE_CHAIN) == 0 ||
- extension->IsJSContextExtensionObject()) {
- *attributes = extension->GetLocalPropertyAttribute(*name);
+ if (context->IsCatchContext()) {
+ // Catch contexts have the variable name in the extension slot.
+ if (name->Equals(String::cast(context->extension()))) {
+ if (FLAG_trace_contexts) {
+ PrintF("=> found in catch context\n");
+ }
+ *index_ = Context::THROWN_OBJECT_INDEX;
+ *attributes = NONE;
+ return context;
+ }
} else {
- *attributes = extension->GetPropertyAttribute(*name);
- }
- if (*attributes != ABSENT) {
- // property found
- if (FLAG_trace_contexts) {
- PrintF("=> found property in context object %p\n",
- reinterpret_cast<void*>(*extension));
+ // Global, function, and with contexts may have an object in the
+ // extension slot.
+ Handle<JSObject> extension(JSObject::cast(context->extension()),
+ isolate);
+ // Context extension objects needs to behave as if they have no
+ // prototype. So even if we want to follow prototype chains, we
+ // need to only do a local lookup for context extension objects.
+ if ((flags & FOLLOW_PROTOTYPE_CHAIN) == 0 ||
+ extension->IsJSContextExtensionObject()) {
+ *attributes = extension->GetLocalPropertyAttribute(*name);
+ } else {
+ *attributes = extension->GetPropertyAttribute(*name);
+ }
+ if (*attributes != ABSENT) {
+ // property found
+ if (FLAG_trace_contexts) {
+ PrintF("=> found property in context object %p\n",
+ reinterpret_cast<void*>(*extension));
+ }
+ return extension;
}
- return extension;
}
}
}
-RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateCatchExtensionObject) {
- ASSERT(args.length() == 2);
- CONVERT_CHECKED(String, key, args[0]);
- Object* value = args[1];
- ASSERT(!value->IsFailure());
- // Create a catch context extension object.
- JSFunction* constructor =
- isolate->context()->global_context()->
- context_extension_function();
- Object* object;
- { MaybeObject* maybe_object = isolate->heap()->AllocateJSObject(constructor);
- if (!maybe_object->ToObject(&object)) return maybe_object;
- }
- // Assign the exception value to the catch variable and make sure
- // that the catch variable is DontDelete.
- { MaybeObject* maybe_value =
- // Passing non-strict per ECMA-262 5th Ed. 12.14. Catch, bullet #4.
- JSObject::cast(object)->SetProperty(
- key, value, DONT_DELETE, kNonStrictMode);
- if (!maybe_value->ToObject(&value)) return maybe_value;
- }
- return object;
-}
-
-
RUNTIME_FUNCTION(MaybeObject*, Runtime_ClassOf) {
NoHandleAllocation ha;
ASSERT(args.length() == 1);
Handle<JSObject> context_ext;
if (context->has_extension()) {
// The function context's extension context exists - use it.
- context_ext = Handle<JSObject>(context->extension());
+ context_ext = Handle<JSObject>(JSObject::cast(context->extension()));
} else {
// The function context's extension context does not exists - allocate
// it.
RUNTIME_FUNCTION(MaybeObject*, Runtime_PushCatchContext) {
NoHandleAllocation ha;
- ASSERT(args.length() == 1);
- JSObject* extension_object = JSObject::cast(args[0]);
+ ASSERT(args.length() == 2);
+ String* name = String::cast(args[0]);
+ Object* thrown_object = args[1];
Context* context;
MaybeObject* maybe_context =
isolate->heap()->AllocateCatchContext(isolate->context(),
- extension_object);
+ name,
+ thrown_object);
if (!maybe_context->To(&context)) return maybe_context;
isolate->set_context(context);
return context;
}
+// Create a plain JSObject which materializes the scope for the specified
+// catch context.
+static Handle<JSObject> MaterializeCatchScope(Isolate* isolate,
+ Handle<Context> context) {
+ ASSERT(context->IsCatchContext());
+ Handle<String> name(String::cast(context->extension()));
+ Handle<Object> thrown_object(context->get(Context::THROWN_OBJECT_INDEX));
+ Handle<JSObject> catch_scope =
+ isolate->factory()->NewJSObject(isolate->object_function());
+ RETURN_IF_EMPTY_HANDLE_VALUE(
+ isolate,
+ SetProperty(catch_scope, name, thrown_object, NONE, kNonStrictMode),
+ Handle<JSObject>());
+ return catch_scope;
+}
+
+
// Iterate over the actual scopes visible from a stack frame. All scopes are
// backed by an actual context except the local scope, which is inserted
// "artifically" in the context chain.
ScopeTypeLocal,
ScopeTypeWith,
ScopeTypeClosure,
- // Every catch block contains an implicit with block (its parameter is
- // a JSContextExtensionObject) that extends current scope with a variable
- // holding exception object. Such with blocks are treated as scopes of their
- // own type.
ScopeTypeCatch
};
return ScopeTypeClosure;
}
ASSERT(context_->has_extension());
- // Current scope is either an explicit with statement or a with statement
- // implicitely generated for a catch block.
- // If the extension object here is a JSContextExtensionObject then
- // current with statement is one frome a catch block otherwise it's a
- // regular with statement.
- if (context_->extension()->IsJSContextExtensionObject()) {
+ if (context_->IsCatchContext()) {
return ScopeTypeCatch;
}
return ScopeTypeWith;
switch (Type()) {
case ScopeIterator::ScopeTypeGlobal:
return Handle<JSObject>(CurrentContext()->global());
- break;
case ScopeIterator::ScopeTypeLocal:
// Materialize the content of the local scope into a JSObject.
return MaterializeLocalScope(isolate_, frame_);
- break;
case ScopeIterator::ScopeTypeWith:
- case ScopeIterator::ScopeTypeCatch:
// Return the with object.
- return Handle<JSObject>(CurrentContext()->extension());
- break;
+ return Handle<JSObject>(JSObject::cast(CurrentContext()->extension()));
+ case ScopeIterator::ScopeTypeCatch:
+ return MaterializeCatchScope(isolate_, CurrentContext());
case ScopeIterator::ScopeTypeClosure:
// Materialize the content of the closure scope into a JSObject.
return MaterializeClosure(isolate_, CurrentContext());
- break;
}
UNREACHABLE();
return Handle<JSObject>();
if (!CurrentContext().is_null()) {
CurrentContext()->Print();
if (CurrentContext()->has_extension()) {
- Handle<JSObject> extension =
- Handle<JSObject>(CurrentContext()->extension());
+ Handle<Object> extension(CurrentContext()->extension());
if (extension->IsJSContextExtensionObject()) {
extension->Print();
}
break;
}
- case ScopeIterator::ScopeTypeWith: {
+ case ScopeIterator::ScopeTypeWith:
PrintF("With:\n");
- Handle<JSObject> extension =
- Handle<JSObject>(CurrentContext()->extension());
- extension->Print();
+ CurrentContext()->extension()->Print();
break;
- }
- case ScopeIterator::ScopeTypeCatch: {
+ case ScopeIterator::ScopeTypeCatch:
PrintF("Catch:\n");
- Handle<JSObject> extension =
- Handle<JSObject>(CurrentContext()->extension());
- extension->Print();
+ CurrentContext()->extension()->Print();
+ CurrentContext()->get(Context::THROWN_OBJECT_INDEX)->Print();
break;
- }
- case ScopeIterator::ScopeTypeClosure: {
+ case ScopeIterator::ScopeTypeClosure:
PrintF("Closure:\n");
CurrentContext()->Print();
if (CurrentContext()->has_extension()) {
- Handle<JSObject> extension =
- Handle<JSObject>(CurrentContext()->extension());
+ Handle<Object> extension(CurrentContext()->extension());
if (extension->IsJSContextExtensionObject()) {
extension->Print();
}
}
break;
- }
default:
UNREACHABLE();
HandleScope scope(isolate);
Handle<Context> previous(current->previous());
Handle<Context> new_previous = CopyWithContextChain(isolate, previous, base);
- Handle<JSObject> extension(JSObject::cast(current->extension()));
- Handle<Context> new_current = current->IsCatchContext()
- ? isolate->factory()->NewCatchContext(new_previous, extension)
- : isolate->factory()->NewWithContext(new_previous, extension);
+ Handle<Context> new_current;
+ if (current->IsCatchContext()) {
+ Handle<String> name(String::cast(current->extension()));
+ Handle<Object> thrown_object(current->get(Context::THROWN_OBJECT_INDEX));
+ new_current =
+ isolate->factory()->NewCatchContext(new_previous, name, thrown_object);
+ } else {
+ Handle<JSObject> extension(JSObject::cast(current->extension()));
+ new_current =
+ isolate->factory()->NewWithContext(new_previous, extension);
+ }
return scope.CloseAndEscape(new_current);
}
projects / platform / upstream / v8.git / commitdiff