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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_HEAP_OBJECTS_VISITING_INL_H_
#define V8_HEAP_OBJECTS_VISITING_INL_H_
#include "src/heap/objects-visiting.h"
#include "src/heap/array-buffer-tracker.h"
#include "src/heap/embedder-tracing.h"
#include "src/heap/mark-compact.h"
#include "src/macro-assembler.h"
#include "src/objects-body-descriptors-inl.h"
#include "src/objects-inl.h"
namespace v8 {
namespace internal {
template <typename ResultType, typename ConcreteVisitor>
template <typename T>
T* HeapVisitor<ResultType, ConcreteVisitor>::Cast(HeapObject* object) {
return T::cast(object);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::Visit(HeapObject* object) {
return Visit(object->map(), object);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::Visit(Map* map,
HeapObject* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
switch (map->visitor_id()) {
#define CASE(type) \
case kVisit##type: \
return visitor->Visit##type(map, \
ConcreteVisitor::template Cast<type>(object));
TYPED_VISITOR_ID_LIST(CASE)
#undef CASE
case kVisitShortcutCandidate:
return visitor->VisitShortcutCandidate(
map, ConcreteVisitor::template Cast<ConsString>(object));
case kVisitNativeContext:
return visitor->VisitNativeContext(
map, ConcreteVisitor::template Cast<Context>(object));
case kVisitDataObject:
return visitor->VisitDataObject(map, object);
case kVisitJSObjectFast:
return visitor->VisitJSObjectFast(
map, ConcreteVisitor::template Cast<JSObject>(object));
case kVisitJSApiObject:
return visitor->VisitJSApiObject(
map, ConcreteVisitor::template Cast<JSObject>(object));
case kVisitStruct:
return visitor->VisitStruct(map, object);
case kVisitFreeSpace:
return visitor->VisitFreeSpace(map, FreeSpace::cast(object));
case kVisitWeakArray:
return visitor->VisitWeakArray(map, object);
case kVisitorIdCount:
UNREACHABLE();
}
UNREACHABLE();
// Make the compiler happy.
return ResultType();
}
template <typename ResultType, typename ConcreteVisitor>
void HeapVisitor<ResultType, ConcreteVisitor>::VisitMapPointer(
HeapObject* host, HeapObject** map) {
static_cast<ConcreteVisitor*>(this)->VisitPointer(
host, reinterpret_cast<Object**>(map));
}
#define VISIT(type) \
template <typename ResultType, typename ConcreteVisitor> \
ResultType HeapVisitor<ResultType, ConcreteVisitor>::Visit##type( \
Map* map, type* object) { \
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this); \
if (!visitor->ShouldVisit(object)) return ResultType(); \
if (!visitor->AllowDefaultJSObjectVisit()) { \
DCHECK_WITH_MSG(!map->IsJSObjectMap(), \
"Implement custom visitor for new JSObject subclass in " \
"concurrent marker"); \
} \
int size = type::BodyDescriptor::SizeOf(map, object); \
if (visitor->ShouldVisitMapPointer()) \
visitor->VisitMapPointer(object, object->map_slot()); \
type::BodyDescriptor::IterateBody(map, object, size, visitor); \
return static_cast<ResultType>(size); \
}
TYPED_VISITOR_ID_LIST(VISIT)
#undef VISIT
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitShortcutCandidate(
Map* map, ConsString* object) {
return static_cast<ConcreteVisitor*>(this)->VisitConsString(map, object);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitNativeContext(
Map* map, Context* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
if (!visitor->ShouldVisit(object)) return ResultType();
int size = Context::BodyDescriptor::SizeOf(map, object);
if (visitor->ShouldVisitMapPointer())
visitor->VisitMapPointer(object, object->map_slot());
Context::BodyDescriptor::IterateBody(map, object, size, visitor);
return static_cast<ResultType>(size);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitDataObject(
Map* map, HeapObject* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
if (!visitor->ShouldVisit(object)) return ResultType();
int size = map->instance_size();
if (visitor->ShouldVisitMapPointer())
visitor->VisitMapPointer(object, object->map_slot());
return static_cast<ResultType>(size);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitJSObjectFast(
Map* map, JSObject* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
if (!visitor->ShouldVisit(object)) return ResultType();
int size = JSObject::FastBodyDescriptor::SizeOf(map, object);
if (visitor->ShouldVisitMapPointer())
visitor->VisitMapPointer(object, object->map_slot());
JSObject::FastBodyDescriptor::IterateBody(map, object, size, visitor);
return static_cast<ResultType>(size);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitJSApiObject(
Map* map, JSObject* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
if (!visitor->ShouldVisit(object)) return ResultType();
int size = JSObject::BodyDescriptor::SizeOf(map, object);
if (visitor->ShouldVisitMapPointer())
visitor->VisitMapPointer(object, object->map_slot());
JSObject::BodyDescriptor::IterateBody(map, object, size, visitor);
return static_cast<ResultType>(size);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitStruct(
Map* map, HeapObject* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
if (!visitor->ShouldVisit(object)) return ResultType();
int size = map->instance_size();
if (visitor->ShouldVisitMapPointer())
visitor->VisitMapPointer(object, object->map_slot());
StructBodyDescriptor::IterateBody(map, object, size, visitor);
return static_cast<ResultType>(size);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitFreeSpace(
Map* map, FreeSpace* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
if (!visitor->ShouldVisit(object)) return ResultType();
if (visitor->ShouldVisitMapPointer())
visitor->VisitMapPointer(object, object->map_slot());
return static_cast<ResultType>(FreeSpace::cast(object)->size());
}
template <typename ConcreteVisitor>
int NewSpaceVisitor<ConcreteVisitor>::VisitNativeContext(Map* map,
Context* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
int size = Context::BodyDescriptor::SizeOf(map, object);
Context::BodyDescriptor::IterateBody(map, object, size, visitor);
return size;
}
template <typename ConcreteVisitor>
int NewSpaceVisitor<ConcreteVisitor>::VisitJSApiObject(Map* map,
JSObject* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
return visitor->VisitJSObject(map, object);
}
template <typename ResultType, typename ConcreteVisitor>
ResultType HeapVisitor<ResultType, ConcreteVisitor>::VisitWeakArray(
Map* map, HeapObject* object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
if (!visitor->ShouldVisit(object)) return ResultType();
int size = WeakArrayBodyDescriptor::SizeOf(map, object);
if (visitor->ShouldVisitMapPointer())
visitor->VisitMapPointer(object, object->map_slot());
WeakArrayBodyDescriptor::IterateBody(map, object, size, visitor);
return size;
}
} // namespace internal
} // namespace v8
#endif // V8_HEAP_OBJECTS_VISITING_INL_H_
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