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Unified Diff: src/objects.cc

Issue 227573002: Return MaybeHandle from SetElement and DeleteElement. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 8 months ago
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Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 7404ee7a109b180d60efd8247ddef96fe8049272..f08c24e72d162bc00d0239db7fe4ceb3f3e99eea 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -478,10 +478,14 @@ MaybeObject* JSProxy::GetPropertyWithHandler(Object* receiver_raw,
if (name->IsSymbol()) return isolate->heap()->undefined_value();
Handle<Object> args[] = { receiver, name };
- Handle<Object> result = CallTrap(
- "get", isolate->derived_get_trap(), ARRAY_SIZE(args), args);
- if (isolate->has_pending_exception()) return Failure::Exception();
-
+ Handle<Object> result;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, result,
+ CallTrap(handle(this),
+ "get",
+ isolate->derived_get_trap(),
+ ARRAY_SIZE(args),
+ args));
return *result;
}
@@ -510,11 +514,11 @@ MaybeObject* JSProxy::GetElementWithHandler(Object* receiver,
}
-Handle<Object> JSProxy::SetElementWithHandler(Handle<JSProxy> proxy,
- Handle<JSReceiver> receiver,
- uint32_t index,
- Handle<Object> value,
- StrictMode strict_mode) {
+MaybeHandle<Object> JSProxy::SetElementWithHandler(Handle<JSProxy> proxy,
+ Handle<JSReceiver> receiver,
+ uint32_t index,
+ Handle<Object> value,
+ StrictMode strict_mode) {
Isolate* isolate = proxy->GetIsolate();
Handle<String> name = isolate->factory()->Uint32ToString(index);
return SetPropertyWithHandler(
@@ -3002,7 +3006,7 @@ Handle<Object> JSReceiver::SetPropertyWithDefinedSetter(
}
-Handle<Object> JSObject::SetElementWithCallbackSetterInPrototypes(
+MaybeHandle<Object> JSObject::SetElementWithCallbackSetterInPrototypes(
Handle<JSObject> object,
uint32_t index,
Handle<Object> value,
@@ -3555,34 +3559,47 @@ bool JSProxy::HasPropertyWithHandler(Handle<JSProxy> proxy, Handle<Name> name) {
if (name->IsSymbol()) return false;
Handle<Object> args[] = { name };
- Handle<Object> result = proxy->CallTrap(
- "has", isolate->derived_has_trap(), ARRAY_SIZE(args), args);
- if (isolate->has_pending_exception()) return false;
+ Handle<Object> result;
+ ASSIGN_RETURN_ON_EXCEPTION_VALUE(
+ isolate, result,
+ CallTrap(proxy,
+ "has",
+ isolate->derived_has_trap(),
+ ARRAY_SIZE(args),
+ args),
+ false);
return result->BooleanValue();
}
-Handle<Object> JSProxy::SetPropertyWithHandler(Handle<JSProxy> proxy,
- Handle<JSReceiver> receiver,
- Handle<Name> name,
- Handle<Object> value,
- PropertyAttributes attributes,
- StrictMode strict_mode) {
+MaybeHandle<Object> JSProxy::SetPropertyWithHandler(
+ Handle<JSProxy> proxy,
+ Handle<JSReceiver> receiver,
+ Handle<Name> name,
+ Handle<Object> value,
+ PropertyAttributes attributes,
+ StrictMode strict_mode) {
Isolate* isolate = proxy->GetIsolate();
// TODO(rossberg): adjust once there is a story for symbols vs proxies.
if (name->IsSymbol()) return value;
Handle<Object> args[] = { receiver, name, value };
- proxy->CallTrap("set", isolate->derived_set_trap(), ARRAY_SIZE(args), args);
- if (isolate->has_pending_exception()) return Handle<Object>();
+ RETURN_ON_EXCEPTION(
+ isolate,
+ CallTrap(proxy,
+ "set",
+ isolate->derived_set_trap(),
+ ARRAY_SIZE(args),
+ args),
+ Object);
return value;
}
-Handle<Object> JSProxy::SetPropertyViaPrototypesWithHandler(
+MaybeHandle<Object> JSProxy::SetPropertyViaPrototypesWithHandler(
Handle<JSProxy> proxy,
Handle<JSReceiver> receiver,
Handle<Name> name,
@@ -3601,9 +3618,15 @@ Handle<Object> JSProxy::SetPropertyViaPrototypesWithHandler(
*done = true; // except where redefined...
Handle<Object> args[] = { name };
- Handle<Object> result = proxy->CallTrap(
- "getPropertyDescriptor", Handle<Object>(), ARRAY_SIZE(args), args);
- if (isolate->has_pending_exception()) return Handle<Object>();
+ Handle<Object> result;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, result,
+ CallTrap(proxy,
+ "getPropertyDescriptor",
+ Handle<Object>(),
+ ARRAY_SIZE(args),
+ args),
+ Object);
if (result->IsUndefined()) {
*done = false;
@@ -3616,7 +3639,7 @@ Handle<Object> JSProxy::SetPropertyViaPrototypesWithHandler(
Handle<Object> desc = Execution::Call(
isolate, isolate->to_complete_property_descriptor(), result,
ARRAY_SIZE(argv), argv, &has_pending_exception);
- if (has_pending_exception) return Handle<Object>();
+ if (has_pending_exception) return MaybeHandle<Object>();
// [[GetProperty]] requires to check that all properties are configurable.
Handle<String> configurable_name =
@@ -3632,8 +3655,7 @@ Handle<Object> JSProxy::SetPropertyViaPrototypesWithHandler(
Handle<Object> args[] = { handler, trap, name };
Handle<Object> error = isolate->factory()->NewTypeError(
"proxy_prop_not_configurable", HandleVector(args, ARRAY_SIZE(args)));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
ASSERT(configurable->IsTrue());
@@ -3657,8 +3679,7 @@ Handle<Object> JSProxy::SetPropertyViaPrototypesWithHandler(
Handle<Object> args[] = { name, receiver };
Handle<Object> error = isolate->factory()->NewTypeError(
"strict_read_only_property", HandleVector(args, ARRAY_SIZE(args)));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
// We have an AccessorDescriptor.
@@ -3676,12 +3697,11 @@ Handle<Object> JSProxy::SetPropertyViaPrototypesWithHandler(
Handle<Object> args2[] = { name, proxy };
Handle<Object> error = isolate->factory()->NewTypeError(
"no_setter_in_callback", HandleVector(args2, ARRAY_SIZE(args2)));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
-Handle<Object> JSProxy::DeletePropertyWithHandler(
+MaybeHandle<Object> JSProxy::DeletePropertyWithHandler(
Handle<JSProxy> proxy, Handle<Name> name, DeleteMode mode) {
Isolate* isolate = proxy->GetIsolate();
@@ -3689,9 +3709,15 @@ Handle<Object> JSProxy::DeletePropertyWithHandler(
if (name->IsSymbol()) return isolate->factory()->false_value();
Handle<Object> args[] = { name };
- Handle<Object> result = proxy->CallTrap(
- "delete", Handle<Object>(), ARRAY_SIZE(args), args);
- if (isolate->has_pending_exception()) return Handle<Object>();
+ Handle<Object> result;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, result,
+ CallTrap(proxy,
+ "delete",
+ Handle<Object>(),
+ ARRAY_SIZE(args),
+ args),
+ Object);
bool result_bool = result->BooleanValue();
if (mode == STRICT_DELETION && !result_bool) {
@@ -3701,14 +3727,13 @@ Handle<Object> JSProxy::DeletePropertyWithHandler(
Handle<Object> args[] = { handler, trap_name };
Handle<Object> error = isolate->factory()->NewTypeError(
"handler_failed", HandleVector(args, ARRAY_SIZE(args)));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
return isolate->factory()->ToBoolean(result_bool);
}
-Handle<Object> JSProxy::DeleteElementWithHandler(
+MaybeHandle<Object> JSProxy::DeleteElementWithHandler(
Handle<JSProxy> proxy, uint32_t index, DeleteMode mode) {
Isolate* isolate = proxy->GetIsolate();
Handle<String> name = isolate->factory()->Uint32ToString(index);
@@ -3727,9 +3752,15 @@ PropertyAttributes JSProxy::GetPropertyAttributeWithHandler(
if (name->IsSymbol()) return ABSENT;
Handle<Object> args[] = { name };
- Handle<Object> result = proxy->CallTrap(
- "getPropertyDescriptor", Handle<Object>(), ARRAY_SIZE(args), args);
- if (isolate->has_pending_exception()) return NONE;
+ Handle<Object> result;
+ ASSIGN_RETURN_ON_EXCEPTION_VALUE(
+ isolate, result,
+ proxy->CallTrap(proxy,
+ "getPropertyDescriptor",
+ Handle<Object>(),
+ ARRAY_SIZE(args),
+ args),
+ NONE);
if (result->IsUndefined()) return ABSENT;
@@ -3768,7 +3799,7 @@ PropertyAttributes JSProxy::GetPropertyAttributeWithHandler(
Handle<Object> args[] = { handler, trap, name };
Handle<Object> error = isolate->factory()->NewTypeError(
"proxy_prop_not_configurable", HandleVector(args, ARRAY_SIZE(args)));
- isolate->Throw(*error);
+ isolate->Throw<Object>(error);
return NONE;
}
@@ -3812,24 +3843,24 @@ void JSProxy::Fix(Handle<JSProxy> proxy) {
}
-MUST_USE_RESULT Handle<Object> JSProxy::CallTrap(const char* name,
- Handle<Object> derived,
- int argc,
- Handle<Object> argv[]) {
- Isolate* isolate = GetIsolate();
- Handle<Object> handler(this->handler(), isolate);
+MaybeHandle<Object> JSProxy::CallTrap(Handle<JSProxy> proxy,
+ const char* name,
+ Handle<Object> derived,
+ int argc,
+ Handle<Object> argv[]) {
+ Isolate* isolate = proxy->GetIsolate();
+ Handle<Object> handler(proxy->handler(), isolate);
Handle<String> trap_name = isolate->factory()->InternalizeUtf8String(name);
Handle<Object> trap = Object::GetPropertyOrElement(handler, trap_name);
- RETURN_IF_EMPTY_HANDLE_VALUE(isolate, trap, Handle<Object>());
+ RETURN_IF_EMPTY_HANDLE_VALUE(isolate, trap, MaybeHandle<Object>());
if (trap->IsUndefined()) {
if (derived.is_null()) {
Handle<Object> args[] = { handler, trap_name };
Handle<Object> error = isolate->factory()->NewTypeError(
"handler_trap_missing", HandleVector(args, ARRAY_SIZE(args)));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
trap = Handle<Object>(derived);
}
@@ -5293,9 +5324,9 @@ Handle<Object> JSObject::DeleteProperty(Handle<JSObject> object,
}
-Handle<Object> JSReceiver::DeleteElement(Handle<JSReceiver> object,
- uint32_t index,
- DeleteMode mode) {
+MaybeHandle<Object> JSReceiver::DeleteElement(Handle<JSReceiver> object,
+ uint32_t index,
+ DeleteMode mode) {
if (object->IsJSProxy()) {
return JSProxy::DeleteElementWithHandler(
Handle<JSProxy>::cast(object), index, mode);
@@ -5304,9 +5335,9 @@ Handle<Object> JSReceiver::DeleteElement(Handle<JSReceiver> object,
}
-Handle<Object> JSReceiver::DeleteProperty(Handle<JSReceiver> object,
- Handle<Name> name,
- DeleteMode mode) {
+MaybeHandle<Object> JSReceiver::DeleteProperty(Handle<JSReceiver> object,
+ Handle<Name> name,
+ DeleteMode mode) {
if (object->IsJSProxy()) {
return JSProxy::DeletePropertyWithHandler(
Handle<JSProxy>::cast(object), name, mode);
@@ -11450,8 +11481,8 @@ Handle<Object> JSArray::SetElementsLength(Handle<JSArray> array,
// Skip deletions where the property was an accessor, leaving holes
// in the array of old values.
if (old_values[i]->IsTheHole()) continue;
- JSObject::SetElement(deleted, indices[i] - index, old_values[i], NONE,
- SLOPPY);
+ JSObject::SetElement(
+ deleted, indices[i] - index, old_values[i], NONE, SLOPPY).Assert();
}
SetProperty(deleted, isolate->factory()->length_string(),
@@ -11895,7 +11926,7 @@ MaybeHandle<AccessorPair> JSObject::GetLocalElementAccessorPair(
}
-Handle<Object> JSObject::SetElementWithInterceptor(
+MaybeHandle<Object> JSObject::SetElementWithInterceptor(
Handle<JSObject> object,
uint32_t index,
Handle<Object> value,
@@ -11919,7 +11950,7 @@ Handle<Object> JSObject::SetElementWithInterceptor(
*object);
v8::Handle<v8::Value> result =
args.Call(setter, index, v8::Utils::ToLocal(value));
- RETURN_HANDLE_IF_SCHEDULED_EXCEPTION(isolate, Object);
+ RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
if (!result.IsEmpty()) return value;
}
@@ -12072,11 +12103,11 @@ bool JSObject::HasDictionaryArgumentsElements() {
// Adding n elements in fast case is O(n*n).
// Note: revisit design to have dual undefined values to capture absent
// elements.
-Handle<Object> JSObject::SetFastElement(Handle<JSObject> object,
- uint32_t index,
- Handle<Object> value,
- StrictMode strict_mode,
- bool check_prototype) {
+MaybeHandle<Object> JSObject::SetFastElement(Handle<JSObject> object,
+ uint32_t index,
+ Handle<Object> value,
+ StrictMode strict_mode,
+ bool check_prototype) {
ASSERT(object->HasFastSmiOrObjectElements() ||
object->HasFastArgumentsElements());
@@ -12103,7 +12134,7 @@ Handle<Object> JSObject::SetFastElement(Handle<JSObject> object,
if (check_prototype &&
(index >= capacity || backing_store->get(index)->IsTheHole())) {
bool found;
- Handle<Object> result = SetElementWithCallbackSetterInPrototypes(
+ MaybeHandle<Object> result = SetElementWithCallbackSetterInPrototypes(
object, index, value, &found, strict_mode);
if (found) return result;
}
@@ -12200,13 +12231,14 @@ Handle<Object> JSObject::SetFastElement(Handle<JSObject> object,
}
-Handle<Object> JSObject::SetDictionaryElement(Handle<JSObject> object,
- uint32_t index,
- Handle<Object> value,
- PropertyAttributes attributes,
- StrictMode strict_mode,
- bool check_prototype,
- SetPropertyMode set_mode) {
+MaybeHandle<Object> JSObject::SetDictionaryElement(
+ Handle<JSObject> object,
+ uint32_t index,
+ Handle<Object> value,
+ PropertyAttributes attributes,
+ StrictMode strict_mode,
+ bool check_prototype,
+ SetPropertyMode set_mode) {
ASSERT(object->HasDictionaryElements() ||
object->HasDictionaryArgumentsElements());
Isolate* isolate = object->GetIsolate();
@@ -12244,8 +12276,7 @@ Handle<Object> JSObject::SetDictionaryElement(Handle<JSObject> object,
Handle<Object> error =
isolate->factory()->NewTypeError("strict_read_only_property",
HandleVector(args, 2));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
}
// Elements of the arguments object in slow mode might be slow aliases.
@@ -12266,8 +12297,8 @@ Handle<Object> JSObject::SetDictionaryElement(Handle<JSObject> object,
// Can cause GC!
if (check_prototype) {
bool found;
- Handle<Object> result = SetElementWithCallbackSetterInPrototypes(object,
- index, value, &found, strict_mode);
+ MaybeHandle<Object> result = SetElementWithCallbackSetterInPrototypes(
+ object, index, value, &found, strict_mode);
if (found) return result;
}
@@ -12283,8 +12314,7 @@ Handle<Object> JSObject::SetDictionaryElement(Handle<JSObject> object,
Handle<Object> error =
isolate->factory()->NewTypeError("object_not_extensible",
HandleVector(args, 1));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
}
@@ -12343,7 +12373,7 @@ Handle<Object> JSObject::SetDictionaryElement(Handle<JSObject> object,
return value;
}
-Handle<Object> JSObject::SetFastDoubleElement(
+MaybeHandle<Object> JSObject::SetFastDoubleElement(
Handle<JSObject> object,
uint32_t index,
Handle<Object> value,
@@ -12360,8 +12390,8 @@ Handle<Object> JSObject::SetFastDoubleElement(
(index >= elms_length ||
Handle<FixedDoubleArray>::cast(base_elms)->is_the_hole(index))) {
bool found;
- Handle<Object> result = SetElementWithCallbackSetterInPrototypes(object,
- index, value, &found, strict_mode);
+ MaybeHandle<Object> result = SetElementWithCallbackSetterInPrototypes(
+ object, index, value, &found, strict_mode);
if (found) return result;
}
@@ -12380,10 +12410,11 @@ Handle<Object> JSObject::SetFastDoubleElement(
if (!value->IsNumber()) {
SetFastElementsCapacityAndLength(object, elms_length, length,
kDontAllowSmiElements);
- Handle<Object> result = SetFastElement(object, index, value, strict_mode,
- check_prototype);
- RETURN_IF_EMPTY_HANDLE_VALUE(object->GetIsolate(), result,
- Handle<Object>());
+ Handle<Object> result;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ object->GetIsolate(), result,
+ SetFastElement(object, index, value, strict_mode, check_prototype),
+ Object);
JSObject::ValidateElements(object);
return result;
}
@@ -12441,11 +12472,11 @@ Handle<Object> JSObject::SetFastDoubleElement(
}
-Handle<Object> JSReceiver::SetElement(Handle<JSReceiver> object,
- uint32_t index,
- Handle<Object> value,
- PropertyAttributes attributes,
- StrictMode strict_mode) {
+MaybeHandle<Object> JSReceiver::SetElement(Handle<JSReceiver> object,
+ uint32_t index,
+ Handle<Object> value,
+ PropertyAttributes attributes,
+ StrictMode strict_mode) {
if (object->IsJSProxy()) {
return JSProxy::SetElementWithHandler(
Handle<JSProxy>::cast(object), object, index, value, strict_mode);
@@ -12455,22 +12486,22 @@ Handle<Object> JSReceiver::SetElement(Handle<JSReceiver> object,
}
-Handle<Object> JSObject::SetOwnElement(Handle<JSObject> object,
- uint32_t index,
- Handle<Object> value,
- StrictMode strict_mode) {
+MaybeHandle<Object> JSObject::SetOwnElement(Handle<JSObject> object,
+ uint32_t index,
+ Handle<Object> value,
+ StrictMode strict_mode) {
ASSERT(!object->HasExternalArrayElements());
return JSObject::SetElement(object, index, value, NONE, strict_mode, false);
}
-Handle<Object> JSObject::SetElement(Handle<JSObject> object,
- uint32_t index,
- Handle<Object> value,
- PropertyAttributes attributes,
- StrictMode strict_mode,
- bool check_prototype,
- SetPropertyMode set_mode) {
+MaybeHandle<Object> JSObject::SetElement(Handle<JSObject> object,
+ uint32_t index,
+ Handle<Object> value,
+ PropertyAttributes attributes,
+ StrictMode strict_mode,
+ bool check_prototype,
+ SetPropertyMode set_mode) {
Isolate* isolate = object->GetIsolate();
if (object->HasExternalArrayElements() ||
@@ -12479,7 +12510,7 @@ Handle<Object> JSObject::SetElement(Handle<JSObject> object,
bool has_exception;
Handle<Object> number =
Execution::ToNumber(isolate, value, &has_exception);
- if (has_exception) return Handle<Object>();
+ if (has_exception) return MaybeHandle<Object>();
value = number;
}
}
@@ -12488,7 +12519,7 @@ Handle<Object> JSObject::SetElement(Handle<JSObject> object,
if (object->IsAccessCheckNeeded()) {
if (!isolate->MayIndexedAccessWrapper(object, index, v8::ACCESS_SET)) {
isolate->ReportFailedAccessCheckWrapper(object, v8::ACCESS_SET);
- RETURN_HANDLE_IF_SCHEDULED_EXCEPTION(isolate, Object);
+ RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
return value;
}
}
@@ -12511,8 +12542,7 @@ Handle<Object> JSObject::SetElement(Handle<JSObject> object,
Handle<Object> args[] = { object, number };
Handle<Object> error = isolate->factory()->NewTypeError(
"redef_external_array_element", HandleVector(args, ARRAY_SIZE(args)));
- isolate->Throw(*error);
- return Handle<Object>();
+ return isolate->Throw<Object>(error);
}
// Normalize the elements to enable attributes on the property.
@@ -12524,13 +12554,10 @@ Handle<Object> JSObject::SetElement(Handle<JSObject> object,
if (!object->map()->is_observed()) {
return object->HasIndexedInterceptor()
- ? SetElementWithInterceptor(object, index, value, attributes, strict_mode,
- check_prototype,
- set_mode)
+ ? SetElementWithInterceptor(object, index, value, attributes,
+ strict_mode, check_prototype, set_mode)
: SetElementWithoutInterceptor(object, index, value, attributes,
- strict_mode,
- check_prototype,
- set_mode);
+ strict_mode, check_prototype, set_mode);
}
PropertyAttributes old_attributes =
@@ -12550,15 +12577,17 @@ Handle<Object> JSObject::SetElement(Handle<JSObject> object,
}
// Check for lookup interceptor
- Handle<Object> result = object->HasIndexedInterceptor()
- ? SetElementWithInterceptor(object, index, value, attributes, strict_mode,
- check_prototype,
- set_mode)
- : SetElementWithoutInterceptor(object, index, value, attributes,
- strict_mode,
- check_prototype,
- set_mode);
- RETURN_IF_EMPTY_HANDLE_VALUE(isolate, result, Handle<Object>());
+ Handle<Object> result;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, result,
+ object->HasIndexedInterceptor()
+ ? SetElementWithInterceptor(
+ object, index, value, attributes,
+ strict_mode, check_prototype, set_mode)
+ : SetElementWithoutInterceptor(
+ object, index, value, attributes,
+ strict_mode, check_prototype, set_mode),
+ Object);
Handle<String> name = isolate->factory()->Uint32ToString(index);
PropertyAttributes new_attributes = GetLocalElementAttribute(object, index);
@@ -12602,7 +12631,7 @@ Handle<Object> JSObject::SetElement(Handle<JSObject> object,
}
-Handle<Object> JSObject::SetElementWithoutInterceptor(
+MaybeHandle<Object> JSObject::SetElementWithoutInterceptor(
Handle<JSObject> object,
uint32_t index,
Handle<Object> value,
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