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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/objects/free-space-inl.h"
#include "src/objects/js-weak-refs-inl.h"
#include "src/objects/module-inl.h"
#include "src/objects/objects-body-descriptors-inl.h"
#include "src/objects/objects-inl.h"
#include "src/objects/oddball.h"
#include "src/objects/ordered-hash-table.h"
#include "src/wasm/wasm-objects.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(TypeName, Type) \
case kVisit##TypeName: \
return visitor->Visit##TypeName( \
map, ConcreteVisitor::template Cast<TypeName>(object));
TYPED_VISITOR_ID_LIST(CASE)
#undef CASE
case kVisitShortcutCandidate:
return visitor->VisitShortcutCandidate(
map, ConcreteVisitor::template Cast<ConsString>(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 kDataOnlyVisitorIdCount:
case kVisitorIdCount:
UNREACHABLE();
}
UNREACHABLE();
// Make the compiler happy.
return ResultType();
}
template <typename ResultType, typename ConcreteVisitor>
void HeapVisitor<ResultType, ConcreteVisitor>::VisitMapPointer(
HeapObject host) {
DCHECK(!host.map_word().IsForwardingAddress());
static_cast<ConcreteVisitor*>(this)->VisitPointer(host, host.map_slot());
}
#define VISIT(TypeName, Type) \
template <typename ResultType, typename ConcreteVisitor> \
ResultType HeapVisitor<ResultType, ConcreteVisitor>::Visit##TypeName( \
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 = TypeName::BodyDescriptor::SizeOf(map, object); \
if (visitor->ShouldVisitMapPointer()) { \
visitor->VisitMapPointer(object); \
} \
TypeName::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>::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);
}
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);
}
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);
}
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);
}
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);
}
return static_cast<ResultType>(object.size());
}
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);
}
WeakArrayBodyDescriptor::IterateBody(map, object, size, visitor);
return size;
}
template <typename ConcreteVisitor>
int NewSpaceVisitor<ConcreteVisitor>::VisitNativeContext(Map map,
NativeContext object) {
ConcreteVisitor* visitor = static_cast<ConcreteVisitor*>(this);
int size = NativeContext::BodyDescriptor::SizeOf(map, object);
NativeContext::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 ConcreteVisitor>
int NewSpaceVisitor<ConcreteVisitor>::VisitSharedFunctionInfo(
Map map, SharedFunctionInfo object) {
UNREACHABLE();
return 0;
}
template <typename ConcreteVisitor>
int NewSpaceVisitor<ConcreteVisitor>::VisitWeakCell(Map map,
WeakCell weak_cell) {
UNREACHABLE();
return 0;
}
} // namespace internal
} // namespace v8
#endif // V8_HEAP_OBJECTS_VISITING_INL_H_