Revision: 7455
Author: [email protected]
Date: Thu Mar 31 03:55:53 2011
Log: Microoptimizations to the way we get the current heap.
Review URL: http://codereview.chromium.org/6759030
http://code.google.com/p/v8/source/detail?r=7455
Modified:
/branches/bleeding_edge/src/objects-inl.h
/branches/bleeding_edge/src/objects.cc
/branches/bleeding_edge/src/objects.h
=======================================
--- /branches/bleeding_edge/src/objects-inl.h Mon Mar 28 06:05:36 2011
+++ /branches/bleeding_edge/src/objects-inl.h Thu Mar 31 03:55:53 2011
@@ -1158,12 +1158,9 @@
Heap* HeapObject::GetHeap() {
- // During GC, the map pointer in HeapObject is used in various ways that
- // prevent us from retrieving Heap from the map.
- // Assert that we are not in GC, implement GC code in a way that it
doesn't
- // pull heap from the map.
- ASSERT(HEAP->is_safe_to_read_maps());
- return map()->heap();
+ uintptr_t addr = reinterpret_cast<uintptr_t>(this);
+ addr >>= kHeapDescriptorGranularityBits;
+ return heap_descriptors[addr].heap;
}
@@ -2860,6 +2857,34 @@
ASSERT(heap->isolate() == Isolate::Current());
return heap;
}
+
+
+Heap* Code::heap() {
+ // NOTE: address() helper is not used to save one instruction.
+ Heap* heap = Page::FromAddress(reinterpret_cast<Address>(this))->heap_;
+ ASSERT(heap != NULL);
+ ASSERT(heap->isolate() == Isolate::Current());
+ return heap;
+}
+
+
+Isolate* Code::isolate() {
+ return heap()->isolate();
+}
+
+
+Heap* JSGlobalPropertyCell::heap() {
+ // NOTE: address() helper is not used to save one instruction.
+ Heap* heap = Page::FromAddress(reinterpret_cast<Address>(this))->heap_;
+ ASSERT(heap != NULL);
+ ASSERT(heap->isolate() == Isolate::Current());
+ return heap;
+}
+
+
+Isolate* JSGlobalPropertyCell::isolate() {
+ return heap()->isolate();
+}
Object* Code::GetObjectFromEntryAddress(Address location_of_address) {
=======================================
--- /branches/bleeding_edge/src/objects.cc Tue Mar 29 06:06:48 2011
+++ /branches/bleeding_edge/src/objects.cc Thu Mar 31 03:55:53 2011
@@ -113,39 +113,47 @@
if (IsSmi()) {
return
Isolate::Current()->heap()->ToBoolean(Smi::cast(this)->value() != 0);
}
- if (IsUndefined() || IsNull()) {
- return HeapObject::cast(this)->GetHeap()->false_value();
+ HeapObject* heap_object = HeapObject::cast(this);
+ if (heap_object->IsUndefined() || heap_object->IsNull()) {
+ return heap_object->GetHeap()->false_value();
}
// Undetectable object is false
- if (IsUndetectableObject()) {
- return HeapObject::cast(this)->GetHeap()->false_value();
- }
- if (IsString()) {
- return HeapObject::cast(this)->GetHeap()->ToBoolean(
+ if (heap_object->IsUndetectableObject()) {
+ return heap_object->GetHeap()->false_value();
+ }
+ if (heap_object->IsString()) {
+ return heap_object->GetHeap()->ToBoolean(
String::cast(this)->length() != 0);
}
- if (IsHeapNumber()) {
+ if (heap_object->IsHeapNumber()) {
return HeapNumber::cast(this)->HeapNumberToBoolean();
}
- return Isolate::Current()->heap()->true_value();
+ return heap_object->GetHeap()->true_value();
}
void Object::Lookup(String* name, LookupResult* result) {
- if (IsJSObject()) return JSObject::cast(this)->Lookup(name, result);
Object* holder = NULL;
- if (IsString()) {
- Heap* heap = HeapObject::cast(this)->GetHeap();
- Context* global_context = heap->isolate()->context()->global_context();
- holder = global_context->string_function()->instance_prototype();
- } else if (IsNumber()) {
+ if (IsSmi()) {
Heap* heap = Isolate::Current()->heap();
Context* global_context = heap->isolate()->context()->global_context();
holder = global_context->number_function()->instance_prototype();
- } else if (IsBoolean()) {
- Heap* heap = HeapObject::cast(this)->GetHeap();
- Context* global_context = heap->isolate()->context()->global_context();
- holder = global_context->boolean_function()->instance_prototype();
+ } else {
+ HeapObject* heap_object = HeapObject::cast(this);
+ if (heap_object->IsJSObject()) {
+ return JSObject::cast(this)->Lookup(name, result);
+ }
+ Heap* heap = heap_object->GetHeap();
+ if (heap_object->IsString()) {
+ Context* global_context =
heap->isolate()->context()->global_context();
+ holder = global_context->string_function()->instance_prototype();
+ } else if (heap_object->IsHeapNumber()) {
+ Context* global_context =
heap->isolate()->context()->global_context();
+ holder = global_context->number_function()->instance_prototype();
+ } else if (heap_object->IsBoolean()) {
+ Context* global_context =
heap->isolate()->context()->global_context();
+ holder = global_context->boolean_function()->instance_prototype();
+ }
}
ASSERT(holder != NULL); // Cannot handle null or undefined.
JSObject::cast(holder)->Lookup(name, result);
@@ -247,7 +255,6 @@
LookupResult* result,
String* name,
PropertyAttributes* attributes) {
- Heap* heap = name->GetHeap();
if (result->IsProperty()) {
switch (result->type()) {
case CALLBACKS: {
@@ -299,6 +306,7 @@
// No accessible property found.
*attributes = ABSENT;
+ Heap* heap = name->GetHeap();
heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_GET);
return heap->undefined_value();
}
@@ -309,7 +317,6 @@
LookupResult* result,
String* name,
bool continue_search) {
- Heap* heap = name->GetHeap();
if (result->IsProperty()) {
switch (result->type()) {
case CALLBACKS: {
@@ -363,7 +370,7 @@
}
}
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
+ GetHeap()->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
return ABSENT;
}
@@ -397,11 +404,11 @@
Object* value,
PropertyDetails details) {
ASSERT(!HasFastProperties());
- Heap* heap = name->GetHeap();
int entry = property_dictionary()->FindEntry(name);
if (entry == StringDictionary::kNotFound) {
Object* store_value = value;
if (IsGlobalObject()) {
+ Heap* heap = name->GetHeap();
MaybeObject* maybe_store_value =
heap->AllocateJSGlobalPropertyCell(value);
if (!maybe_store_value->ToObject(&store_value)) return
maybe_store_value;
@@ -433,7 +440,6 @@
MaybeObject* JSObject::DeleteNormalizedProperty(String* name, DeleteMode
mode) {
ASSERT(!HasFastProperties());
- Heap* heap = GetHeap();
StringDictionary* dictionary = property_dictionary();
int entry = dictionary->FindEntry(name);
if (entry != StringDictionary::kNotFound) {
@@ -441,7 +447,7 @@
if (IsGlobalObject()) {
PropertyDetails details = dictionary->DetailsAt(entry);
if (details.IsDontDelete()) {
- if (mode != FORCE_DELETION) return heap->false_value();
+ if (mode != FORCE_DELETION) return GetHeap()->false_value();
// When forced to delete global properties, we have to make a
// map change to invalidate any ICs that think they can load
// from the DontDelete cell without checking if it contains
@@ -454,13 +460,13 @@
}
JSGlobalPropertyCell* cell =
JSGlobalPropertyCell::cast(dictionary->ValueAt(entry));
- cell->set_value(heap->the_hole_value());
+ cell->set_value(cell->heap()->the_hole_value());
dictionary->DetailsAtPut(entry, details.AsDeleted());
} else {
return dictionary->DeleteProperty(entry, mode);
}
}
- return heap->true_value();
+ return GetHeap()->true_value();
}
@@ -550,22 +556,31 @@
MaybeObject* Object::GetElementWithReceiver(Object* receiver, uint32_t
index) {
- if (IsJSObject()) {
- return JSObject::cast(this)->GetElementWithReceiver(receiver, index);
- }
-
Object* holder = NULL;
- Context* global_context =
Isolate::Current()->context()->global_context();
- if (IsString()) {
- holder = global_context->string_function()->instance_prototype();
- } else if (IsNumber()) {
+ if (IsSmi()) {
+ Context* global_context =
Isolate::Current()->context()->global_context();
holder = global_context->number_function()->instance_prototype();
- } else if (IsBoolean()) {
- holder = global_context->boolean_function()->instance_prototype();
} else {
- // Undefined and null have no indexed properties.
- ASSERT(IsUndefined() || IsNull());
- return HEAP->undefined_value();
+ HeapObject* heap_object = HeapObject::cast(this);
+
+ if (heap_object->IsJSObject()) {
+ return JSObject::cast(this)->GetElementWithReceiver(receiver, index);
+ }
+ Heap* heap = heap_object->GetHeap();
+ Isolate* isolate = heap->isolate();
+
+ Context* global_context = isolate->context()->global_context();
+ if (heap_object->IsString()) {
+ holder = global_context->string_function()->instance_prototype();
+ } else if (heap_object->IsHeapNumber()) {
+ holder = global_context->number_function()->instance_prototype();
+ } else if (heap_object->IsBoolean()) {
+ holder = global_context->boolean_function()->instance_prototype();
+ } else {
+ // Undefined and null have no indexed properties.
+ ASSERT(heap_object->IsUndefined() || heap_object->IsNull());
+ return heap->undefined_value();
+ }
}
return JSObject::cast(holder)->GetElementWithReceiver(receiver, index);
@@ -573,14 +588,28 @@
Object* Object::GetPrototype() {
+ if (IsSmi()) {
+ Heap* heap = Isolate::Current()->heap();
+ Context* context = heap->isolate()->context()->global_context();
+ return context->number_function()->instance_prototype();
+ }
+
+ HeapObject* heap_object = HeapObject::cast(this);
+
// The object is either a number, a string, a boolean, or a real JS
object.
- if (IsJSObject()) return JSObject::cast(this)->map()->prototype();
- Heap* heap = Isolate::Current()->heap();
+ if (heap_object->IsJSObject()) {
+ return JSObject::cast(this)->map()->prototype();
+ }
+ Heap* heap = heap_object->GetHeap();
Context* context = heap->isolate()->context()->global_context();
- if (IsNumber()) return context->number_function()->instance_prototype();
- if (IsString()) return context->string_function()->instance_prototype();
- if (IsBoolean()) {
+ if (heap_object->IsHeapNumber()) {
+ return context->number_function()->instance_prototype();
+ }
+ if (heap_object->IsString()) {
+ return context->string_function()->instance_prototype();
+ }
+ if (heap_object->IsBoolean()) {
return context->boolean_function()->instance_prototype();
} else {
return heap->null_value();
@@ -908,8 +937,9 @@
// All other JSObjects are rather similar to each other (JSObject,
// JSGlobalProxy, JSGlobalObject, JSUndetectableObject, JSValue).
default: {
- Heap* heap = GetHeap();
- Object* constructor = map()->constructor();
+ Map* map_of_this = map();
+ Heap* heap = map_of_this->heap();
+ Object* constructor = map_of_this->constructor();
bool printed = false;
if (constructor->IsHeapObject() &&
!heap->Contains(HeapObject::cast(constructor))) {
@@ -1350,8 +1380,7 @@
String* name,
JSFunction* function,
PropertyAttributes attributes) {
- Heap* heap = GetHeap();
- ASSERT(!heap->InNewSpace(function));
+ ASSERT(!GetHeap()->InNewSpace(function));
// Allocate new instance descriptors with (name, function) added
ConstantFunctionDescriptor d(name, function, attributes);
@@ -1376,6 +1405,7 @@
// If the old map is the global object map (from new Object()),
// then transitions are not added to it, so we are done.
+ Heap* heap = old_map->heap();
if (old_map == heap->isolate()->context()->global_context()->
object_function()->map()) {
return function;
@@ -1412,7 +1442,6 @@
Object* value,
PropertyAttributes attributes) {
ASSERT(!HasFastProperties());
- Heap* heap = GetHeap();
StringDictionary* dict = property_dictionary();
Object* store_value = value;
if (IsGlobalObject()) {
@@ -1429,6 +1458,7 @@
dict->SetEntry(entry, name, store_value, details);
return value;
}
+ Heap* heap = GetHeap();
{ MaybeObject* maybe_store_value =
heap->AllocateJSGlobalPropertyCell(value);
if (!maybe_store_value->ToObject(&store_value)) return
maybe_store_value;
@@ -1450,8 +1480,9 @@
PropertyAttributes attributes,
StrictModeFlag strict_mode) {
ASSERT(!IsJSGlobalProxy());
- Heap* heap = GetHeap();
- if (!map()->is_extensible()) {
+ Map* map_of_this = map();
+ Heap* heap = map_of_this->heap();
+ if (!map_of_this->is_extensible()) {
if (strict_mode == kNonStrictMode) {
return heap->undefined_value();
} else {
@@ -1463,7 +1494,7 @@
}
if (HasFastProperties()) {
// Ensure the descriptor array does not get too big.
- if (map()->instance_descriptors()->number_of_descriptors() <
+ if (map_of_this->instance_descriptors()->number_of_descriptors() <
DescriptorArray::kMaxNumberOfDescriptors) {
if (value->IsJSFunction() && !heap->InNewSpace(value)) {
return AddConstantFunctionProperty(name,
@@ -1537,7 +1568,7 @@
return result;
}
// Do not add transitions to the map of "new Object()".
- if (map() == GetHeap()->isolate()->context()->global_context()->
+ if (map() == old_map->heap()->isolate()->context()->global_context()->
object_function()->map()) {
return result;
}
@@ -1836,8 +1867,9 @@
MaybeObject* Map::GetExternalArrayElementsMap(ExternalArrayType array_type,
bool safe_to_add_transition)
{
+ Heap* current_heap = heap();
DescriptorArray* descriptors = instance_descriptors();
- String* external_array_sentinel_name =
GetIsolate()->heap()->empty_symbol();
+ String* external_array_sentinel_name = current_heap->empty_symbol();
if (safe_to_add_transition) {
// It's only safe to manipulate the descriptor array if it would be
@@ -1845,7 +1877,8 @@
ASSERT(!is_shared()); // no transitions can be added to shared maps.
// Check if the external array transition already exists.
- DescriptorLookupCache* cache =
heap()->isolate()->descriptor_lookup_cache();
+ DescriptorLookupCache* cache =
+ current_heap->isolate()->descriptor_lookup_cache();
int index = cache->Lookup(descriptors, external_array_sentinel_name);
if (index == DescriptorLookupCache::kAbsent) {
index = descriptors->Search(external_array_sentinel_name);
@@ -1979,7 +2012,6 @@
String* name,
Object* value,
bool
check_prototype) {
- Heap* heap = GetHeap();
if (check_prototype && !result->IsProperty()) {
LookupCallbackSetterInPrototypes(name, result);
}
@@ -2020,6 +2052,7 @@
HandleScope scope;
Handle<Object> value_handle(value);
+ Heap* heap = GetHeap();
heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_SET);
return *value_handle;
}
@@ -2157,7 +2190,6 @@
String* name,
Object* value,
PropertyAttributes attributes) {
- Heap* heap = GetHeap();
// Make sure that the top context does not change when doing callbacks or
// interceptor calls.
@@ -2165,9 +2197,11 @@
LookupResult result;
LocalLookup(name, &result);
// Check access rights if needed.
- if (IsAccessCheckNeeded()
- && !heap->isolate()->MayNamedAccess(this, name, v8::ACCESS_SET)) {
- return SetPropertyWithFailedAccessCheck(&result, name, value, false);
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayNamedAccess(this, name, v8::ACCESS_SET)) {
+ return SetPropertyWithFailedAccessCheck(&result, name, value, false);
+ }
}
if (IsJSGlobalProxy()) {
@@ -2318,14 +2352,15 @@
LookupResult* result,
String* name,
bool continue_search) {
- Heap* heap = GetHeap();
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayNamedAccess(this, name, v8::ACCESS_HAS)) {
- return GetPropertyAttributeWithFailedAccessCheck(receiver,
- result,
- name,
- continue_search);
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayNamedAccess(this, name, v8::ACCESS_HAS)) {
+ return GetPropertyAttributeWithFailedAccessCheck(receiver,
+ result,
+ name,
+ continue_search);
+ }
}
if (result->IsProperty()) {
switch (result->type()) {
@@ -2465,10 +2500,10 @@
// JSGlobalProxy must never be normalized
ASSERT(!IsJSGlobalProxy());
- Heap* heap = GetHeap();
+ Map* map_of_this = map();
// Allocate new content.
- int property_count = map()->NumberOfDescribedProperties();
+ int property_count = map_of_this->NumberOfDescribedProperties();
if (expected_additional_properties > 0) {
property_count += expected_additional_properties;
} else {
@@ -2481,7 +2516,7 @@
}
StringDictionary* dictionary = StringDictionary::cast(obj);
- DescriptorArray* descs = map()->instance_descriptors();
+ DescriptorArray* descs = map_of_this->instance_descriptors();
for (int i = 0; i < descs->number_of_descriptors(); i++) {
PropertyDetails details = descs->GetDetails(i);
switch (details.type()) {
@@ -2530,12 +2565,15 @@
UNREACHABLE();
}
}
+
+ Heap* current_heap = map_of_this->heap();
// Copy the next enumeration index from instance descriptor.
- int index = map()->instance_descriptors()->NextEnumerationIndex();
+ int index = map_of_this->instance_descriptors()->NextEnumerationIndex();
dictionary->SetNextEnumerationIndex(index);
- { MaybeObject* maybe_obj = heap->isolate()->context()->global_context()->
+ { MaybeObject* maybe_obj =
+ current_heap->isolate()->context()->global_context()->
normalized_map_cache()->Get(this, mode);
if (!maybe_obj->ToObject(&obj)) return maybe_obj;
}
@@ -2546,17 +2584,17 @@
// Resize the object in the heap if necessary.
int new_instance_size = new_map->instance_size();
- int instance_size_delta = map()->instance_size() - new_instance_size;
+ int instance_size_delta = map_of_this->instance_size() -
new_instance_size;
ASSERT(instance_size_delta >= 0);
- heap->CreateFillerObjectAt(this->address() + new_instance_size,
- instance_size_delta);
+ current_heap->CreateFillerObjectAt(this->address() + new_instance_size,
+ instance_size_delta);
set_map(new_map);
- map()->set_instance_descriptors(heap->empty_descriptor_array());
+
new_map->set_instance_descriptors(current_heap->empty_descriptor_array());
set_properties(dictionary);
- heap->isolate()->counters()->props_to_dictionary()->Increment();
+ current_heap->isolate()->counters()->props_to_dictionary()->Increment();
#ifdef DEBUG
if (FLAG_trace_normalization) {
@@ -2579,10 +2617,11 @@
MaybeObject* JSObject::NormalizeElements() {
ASSERT(!HasExternalArrayElements());
if (HasDictionaryElements()) return this;
- ASSERT(map()->has_fast_elements());
+ Map* old_map = map();
+ ASSERT(old_map->has_fast_elements());
Object* obj;
- { MaybeObject* maybe_obj = map()->GetSlowElementsMap();
+ { MaybeObject* maybe_obj = old_map->GetSlowElementsMap();
if (!maybe_obj->ToObject(&obj)) return maybe_obj;
}
Map* new_map = Map::cast(obj);
@@ -2617,7 +2656,7 @@
set_map(new_map);
set_elements(dictionary);
- new_map->GetHeap()->isolate()->counters()->elements_to_dictionary()->
+ new_map->heap()->isolate()->counters()->elements_to_dictionary()->
Increment();
#ifdef DEBUG
@@ -2634,10 +2673,9 @@
MaybeObject* JSObject::DeletePropertyPostInterceptor(String* name,
DeleteMode mode) {
// Check local property, ignore interceptor.
- Heap* heap = GetHeap();
LookupResult result;
LocalLookupRealNamedProperty(name, &result);
- if (!result.IsProperty()) return heap->true_value();
+ if (!result.IsProperty()) return GetHeap()->true_value();
// Normalize object if needed.
Object* obj;
@@ -2683,7 +2721,6 @@
MaybeObject* JSObject::DeleteElementPostInterceptor(uint32_t index,
DeleteMode mode) {
- Heap* heap = GetHeap();
ASSERT(!HasExternalArrayElements());
switch (GetElementsKind()) {
case FAST_ELEMENTS: {
@@ -2711,7 +2748,7 @@
UNREACHABLE();
break;
}
- return heap->true_value();
+ return GetHeap()->true_value();
}
@@ -2884,16 +2921,17 @@
// Check whether this object references another object.
bool JSObject::ReferencesObject(Object* obj) {
- Heap* heap = GetHeap();
+ Map* map_of_this = map();
+ Heap* heap = map_of_this->heap();
AssertNoAllocation no_alloc;
// Is the object the constructor for this object?
- if (map()->constructor() == obj) {
+ if (map_of_this->constructor() == obj) {
return true;
}
// Is the object the prototype for this object?
- if (map()->prototype() == obj) {
+ if (map_of_this->prototype() == obj) {
return true;
}
@@ -3503,7 +3541,6 @@
Object* JSObject::SlowReverseLookup(Object* value) {
- Heap* heap = GetHeap();
if (HasFastProperties()) {
DescriptorArray* descs = map()->instance_descriptors();
for (int i = 0; i < descs->number_of_descriptors(); i++) {
@@ -3517,7 +3554,7 @@
}
}
}
- return heap->undefined_value();
+ return GetHeap()->undefined_value();
} else {
return property_dictionary()->SlowReverseLookup(value);
}
@@ -3621,7 +3658,7 @@
// Allocate the code cache if not present.
if (code_cache()->IsFixedArray()) {
Object* result;
- { MaybeObject* maybe_result = GetHeap()->AllocateCodeCache();
+ { MaybeObject* maybe_result = code->heap()->AllocateCodeCache();
if (!maybe_result->ToObject(&result)) return maybe_result;
}
set_code_cache(result);
@@ -3807,7 +3844,6 @@
Object* CodeCache::LookupDefaultCache(String* name, Code::Flags flags) {
- Heap* heap = GetHeap();
FixedArray* cache = default_cache();
int length = cache->length();
for (int i = 0; i < length; i += kCodeCacheEntrySize) {
@@ -3822,7 +3858,7 @@
}
}
}
- return heap->undefined_value();
+ return GetHeap()->undefined_value();
}
@@ -3913,7 +3949,7 @@
MUST_USE_RESULT MaybeObject* AsObject() {
ASSERT(code_ != NULL);
Object* obj;
- { MaybeObject* maybe_obj = code_->GetHeap()->AllocateFixedArray(2);
+ { MaybeObject* maybe_obj = code_->heap()->AllocateFixedArray(2);
if (!maybe_obj->ToObject(&obj)) return maybe_obj;
}
FixedArray* pair = FixedArray::cast(obj);
@@ -3991,7 +4027,6 @@
MaybeObject* FixedArray::AddKeysFromJSArray(JSArray* array) {
- Heap* heap = GetHeap();
ASSERT(!array->HasExternalArrayElements());
switch (array->GetElementsKind()) {
case JSObject::FAST_ELEMENTS:
@@ -4002,7 +4037,7 @@
// Allocate a temporary fixed array.
Object* object;
- { MaybeObject* maybe_object = heap->AllocateFixedArray(size);
+ { MaybeObject* maybe_object = GetHeap()->AllocateFixedArray(size);
if (!maybe_object->ToObject(&object)) return maybe_object;
}
FixedArray* key_array = FixedArray::cast(object);
@@ -4022,12 +4057,11 @@
UNREACHABLE();
}
UNREACHABLE();
- return heap->null_value(); // Failure case needs to "return" a value.
+ return GetHeap()->null_value(); // Failure case needs to "return" a
value.
}
MaybeObject* FixedArray::UnionOfKeys(FixedArray* other) {
- Heap* heap = GetHeap();
int len0 = length();
#ifdef DEBUG
if (FLAG_enable_slow_asserts) {
@@ -4053,7 +4087,7 @@
// Allocate the result
Object* obj;
- { MaybeObject* maybe_obj = heap->AllocateFixedArray(len0 + extra);
+ { MaybeObject* maybe_obj = GetHeap()->AllocateFixedArray(len0 + extra);
if (!maybe_obj->ToObject(&obj)) return maybe_obj;
}
// Fill in the content
@@ -5373,7 +5407,7 @@
if (StringShape(this).IsSymbol()) return false;
Map* map = this->map();
- Heap* heap = map->GetHeap();
+ Heap* heap = map->heap();
if (map == heap->string_map()) {
this->set_map(heap->undetectable_string_map());
return true;
@@ -5702,17 +5736,18 @@
// used for constructing objects to the original object prototype.
// See ECMA-262 13.2.2.
if (!value->IsJSObject()) {
- Heap* heap = GetHeap();
// Copy the map so this does not affect unrelated functions.
// Remove map transitions because they point to maps with a
// different prototype.
- Object* new_map;
+ Object* new_object;
{ MaybeObject* maybe_new_map = map()->CopyDropTransitions();
- if (!maybe_new_map->ToObject(&new_map)) return maybe_new_map;
- }
- set_map(Map::cast(new_map));
- map()->set_constructor(value);
- map()->set_non_instance_prototype(true);
+ if (!maybe_new_map->ToObject(&new_object)) return maybe_new_map;
+ }
+ Map* new_map = Map::cast(new_object);
+ Heap* heap = new_map->heap();
+ set_map(new_map);
+ new_map->set_constructor(value);
+ new_map->set_non_instance_prototype(true);
construct_prototype =
heap->isolate()->context()->global_context()->
initial_object_prototype();
@@ -5740,7 +5775,7 @@
ASSERT(shared()->strict_mode() || map() ==
global_context->function_map());
set_map(no_prototype_map);
- set_prototype_or_initial_map(GetHeap()->the_hole_value());
+ set_prototype_or_initial_map(no_prototype_map->heap()->the_hole_value());
return this;
}
@@ -5822,8 +5857,6 @@
bool SharedFunctionInfo::CanGenerateInlineConstructor(Object* prototype) {
- Heap* heap = GetHeap();
-
// Check the basic conditions for generating inline constructor code.
if (!FLAG_inline_new
|| !has_only_simple_this_property_assignments()
@@ -5836,6 +5869,8 @@
ASSERT(prototype->IsNull());
return true;
}
+
+ Heap* heap = GetHeap();
// Traverse the proposed prototype chain looking for setters for
properties of
// the same names as are set by the inline constructor.
@@ -6156,7 +6191,7 @@
void Code::InvalidateRelocation() {
- set_relocation_info(GetHeap()->empty_byte_array());
+ set_relocation_info(heap()->empty_byte_array());
}
@@ -6734,7 +6769,6 @@
MaybeObject* JSObject::SetElementsLength(Object* len) {
- Heap* heap = GetHeap();
// We should never end in here with a pixel or external array.
ASSERT(AllowsSetElementsLength());
@@ -6742,7 +6776,7 @@
Object* smi_length = Smi::FromInt(0);
if (maybe_smi_length->ToObject(&smi_length) && smi_length->IsSmi()) {
const int value = Smi::cast(smi_length)->value();
- if (value < 0) return ArrayLengthRangeError(heap);
+ if (value < 0) return ArrayLengthRangeError(GetHeap());
switch (GetElementsKind()) {
case FAST_ELEMENTS: {
int old_capacity = FixedArray::cast(elements())->length();
@@ -6808,14 +6842,14 @@
if (len->ToArrayIndex(&length)) {
return SetSlowElements(len);
} else {
- return ArrayLengthRangeError(heap);
+ return ArrayLengthRangeError(GetHeap());
}
}
// len is not a number so make the array size one and
// set only element to len.
Object* obj;
- { MaybeObject* maybe_obj = heap->AllocateFixedArray(1);
+ { MaybeObject* maybe_obj = GetHeap()->AllocateFixedArray(1);
if (!maybe_obj->ToObject(&obj)) return maybe_obj;
}
FixedArray::cast(obj)->set(0, len);
@@ -6970,13 +7004,13 @@
JSObject::LocalElementType JSObject::HasLocalElement(uint32_t index) {
- Heap* heap = GetHeap();
-
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
- return UNDEFINED_ELEMENT;
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
+ heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
+ return UNDEFINED_ELEMENT;
+ }
}
if (IsJSGlobalProxy()) {
@@ -7042,13 +7076,13 @@
bool JSObject::HasElementWithReceiver(JSObject* receiver, uint32_t index) {
- Heap* heap = GetHeap();
-
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
- return false;
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
+ heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
+ return false;
+ }
}
// Check for lookup interceptor
@@ -7320,14 +7354,15 @@
Object* value,
StrictModeFlag strict_mode,
bool check_prototype) {
- Heap* heap = GetHeap();
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_SET)) {
- HandleScope scope;
- Handle<Object> value_handle(value);
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_SET);
- return *value_handle;
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_SET)) {
+ HandleScope scope;
+ Handle<Object> value_handle(value);
+ heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_SET);
+ return *value_handle;
+ }
}
if (IsJSGlobalProxy()) {
@@ -7522,7 +7557,6 @@
MaybeObject* JSObject::GetElementPostInterceptor(Object* receiver,
uint32_t index) {
- Heap* heap = GetHeap();
// Get element works for both JSObject and JSArray since
// JSArray::length cannot change.
switch (GetElementsKind()) {
@@ -7571,7 +7605,7 @@
// Continue searching via the prototype chain.
Object* pt = GetPrototype();
- if (pt->IsNull()) return heap->undefined_value();
+ if (pt->IsNull()) return GetHeap()->undefined_value();
return pt->GetElementWithReceiver(receiver, index);
}
@@ -7613,12 +7647,13 @@
MaybeObject* JSObject::GetElementWithReceiver(Object* receiver,
uint32_t index) {
- Heap* heap = GetHeap();
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_GET)) {
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_GET);
- return heap->undefined_value();
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_GET)) {
+ heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_GET);
+ return heap->undefined_value();
+ }
}
if (HasIndexedInterceptor()) {
@@ -7669,6 +7704,7 @@
}
Object* pt = GetPrototype();
+ Heap* heap = GetHeap();
if (pt == heap->null_value()) return heap->undefined_value();
return pt->GetElementWithReceiver(receiver, index);
}
@@ -7895,7 +7931,6 @@
JSObject* receiver,
String* name,
PropertyAttributes* attributes) {
- Heap* heap = GetHeap();
// Check local property in holder, ignore interceptor.
LookupResult result;
LocalLookupRealNamedProperty(name, &result);
@@ -7905,7 +7940,7 @@
// Continue searching via the prototype chain.
Object* pt = GetPrototype();
*attributes = ABSENT;
- if (pt->IsNull()) return heap->undefined_value();
+ if (pt->IsNull()) return GetHeap()->undefined_value();
return pt->GetPropertyWithReceiver(receiver, name, attributes);
}
@@ -7914,14 +7949,13 @@
JSObject* receiver,
String* name,
PropertyAttributes* attributes) {
- Heap* heap = GetHeap();
// Check local property in holder, ignore interceptor.
LookupResult result;
LocalLookupRealNamedProperty(name, &result);
if (result.IsProperty()) {
return GetProperty(receiver, &result, name, attributes);
}
- return heap->undefined_value();
+ return GetHeap()->undefined_value();
}
@@ -7966,12 +8000,13 @@
bool JSObject::HasRealNamedProperty(String* key) {
- Heap* heap = GetHeap();
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayNamedAccess(this, key, v8::ACCESS_HAS)) {
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
- return false;
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayNamedAccess(this, key, v8::ACCESS_HAS)) {
+ heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
+ return false;
+ }
}
LookupResult result;
@@ -7981,12 +8016,13 @@
bool JSObject::HasRealElementProperty(uint32_t index) {
- Heap* heap = GetHeap();
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
- return false;
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
+ heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
+ return false;
+ }
}
// Handle [] on String objects.
@@ -8025,17 +8061,18 @@
}
// All possibilities have been handled above already.
UNREACHABLE();
- return heap->null_value();
+ return GetHeap()->null_value();
}
bool JSObject::HasRealNamedCallbackProperty(String* key) {
- Heap* heap = GetHeap();
// Check access rights if needed.
- if (IsAccessCheckNeeded() &&
- !heap->isolate()->MayNamedAccess(this, key, v8::ACCESS_HAS)) {
- heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
- return false;
+ if (IsAccessCheckNeeded()) {
+ Heap* heap = GetHeap();
+ if (!heap->isolate()->MayNamedAccess(this, key, v8::ACCESS_HAS)) {
+ heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
+ return false;
+ }
}
LookupResult result;
@@ -8674,7 +8711,6 @@
template<typename Shape, typename Key>
MaybeObject* HashTable<Shape, Key>::EnsureCapacity(int n, Key key) {
- Heap* heap = GetHeap();
int capacity = Capacity();
int nof = NumberOfElements() + n;
int nod = NumberOfDeletedElements();
@@ -8688,7 +8724,7 @@
const int kMinCapacityForPretenure = 256;
bool pretenure =
- (capacity > kMinCapacityForPretenure) && !heap->InNewSpace(this);
+ (capacity > kMinCapacityForPretenure)
&& !GetHeap()->InNewSpace(this);
Object* obj;
{ MaybeObject* maybe_obj =
Allocate(nof * 2, pretenure ? TENURED : NOT_TENURED);
@@ -8820,7 +8856,6 @@
// Collates undefined and unexisting elements below limit from position
// zero of the elements. The object stays in Dictionary mode.
MaybeObject* JSObject::PrepareSlowElementsForSort(uint32_t limit) {
- Heap* heap = GetHeap();
ASSERT(HasDictionaryElements());
// Must stay in dictionary mode, either because of
requires_slow_elements,
// or because we are not going to sort (and therefore compact) all of the
@@ -8830,7 +8865,7 @@
if (limit > static_cast<uint32_t>(Smi::kMaxValue)) {
// Allocate space for result before we start mutating the object.
Object* new_double;
- { MaybeObject* maybe_new_double = heap->AllocateHeapNumber(0.0);
+ { MaybeObject* maybe_new_double = GetHeap()->AllocateHeapNumber(0.0);
if (!maybe_new_double->ToObject(&new_double)) return
maybe_new_double;
}
result_double = HeapNumber::cast(new_double);
@@ -8890,6 +8925,7 @@
uint32_t result = pos;
PropertyDetails no_details = PropertyDetails(NONE, NORMAL);
+ Heap* heap = GetHeap();
while (undefs > 0) {
if (pos > static_cast<uint32_t>(Smi::kMaxValue)) {
// Adding an entry with the key beyond smi-range requires
@@ -8919,9 +8955,10 @@
// If the object is in dictionary mode, it is converted to fast elements
// mode.
MaybeObject* JSObject::PrepareElementsForSort(uint32_t limit) {
- Heap* heap = GetHeap();
ASSERT(!HasExternalArrayElements());
+ Heap* heap = GetHeap();
+
if (HasDictionaryElements()) {
// Convert to fast elements containing only the existing properties.
// Ordering is irrelevant, since we are going to sort anyway.
@@ -9175,9 +9212,9 @@
MaybeObject* GlobalObject::EnsurePropertyCell(String* name) {
ASSERT(!HasFastProperties());
- Heap* heap = GetHeap();
int entry = property_dictionary()->FindEntry(name);
if (entry == StringDictionary::kNotFound) {
+ Heap* heap = GetHeap();
Object* cell;
{ MaybeObject* maybe_cell =
heap->AllocateJSGlobalPropertyCell(heap->the_hole_value());
@@ -9352,10 +9389,9 @@
Object* CompilationCacheTable::Lookup(String* src) {
- Heap* heap = GetHeap();
StringKey key(src);
int entry = FindEntry(&key);
- if (entry == kNotFound) return heap->undefined_value();
+ if (entry == kNotFound) return GetHeap()->undefined_value();
return get(EntryToIndex(entry) + 1);
}
@@ -9372,10 +9408,9 @@
***The diff for this file has been truncated for email.***
=======================================
--- /branches/bleeding_edge/src/objects.h Sun Mar 27 23:11:08 2011
+++ /branches/bleeding_edge/src/objects.h Thu Mar 31 03:55:53 2011
@@ -3487,6 +3487,10 @@
void CodeVerify();
#endif
+ // Returns the isolate/heap this code object belongs to.
+ inline Isolate* isolate();
+ inline Heap* heap();
+
// Max loop nesting marker used to postpose OSR. We don't take loop
// nesting that is deeper than 5 levels into account.
static const int kMaxLoopNestingMarker = 6;
@@ -6009,6 +6013,10 @@
kValueOffset + kPointerSize,
kSize> BodyDescriptor;
+ // Returns the isolate/heap this cell object belongs to.
+ inline Isolate* isolate();
+ inline Heap* heap();
+
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(JSGlobalPropertyCell);
};
--
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