1 // Copyright 2016 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef V8_HEAP_REMEMBERED_SET_INL_H_
6 #define V8_HEAP_REMEMBERED_SET_INL_H_
7
8 #include "src/common/ptr-compr-inl.h"
9 #include "src/heap/remembered-set.h"
10
11 namespace v8 {
12 namespace internal {
13
14 template <typename Callback>
UpdateTypedSlot(Heap * heap,SlotType slot_type,Address addr,Callback callback)15 SlotCallbackResult UpdateTypedSlotHelper::UpdateTypedSlot(Heap* heap,
16 SlotType slot_type,
17 Address addr,
18 Callback callback) {
19 switch (slot_type) {
20 case SlotType::kCodeEntry: {
21 RelocInfo rinfo(addr, RelocInfo::CODE_TARGET, 0, Code());
22 return UpdateCodeTarget(&rinfo, callback);
23 }
24 case SlotType::kConstPoolCodeEntry: {
25 return UpdateCodeEntry(addr, callback);
26 }
27 case SlotType::kEmbeddedObjectCompressed: {
28 RelocInfo rinfo(addr, RelocInfo::COMPRESSED_EMBEDDED_OBJECT, 0, Code());
29 return UpdateEmbeddedPointer(heap, &rinfo, callback);
30 }
31 case SlotType::kEmbeddedObjectFull: {
32 RelocInfo rinfo(addr, RelocInfo::FULL_EMBEDDED_OBJECT, 0, Code());
33 return UpdateEmbeddedPointer(heap, &rinfo, callback);
34 }
35 case SlotType::kEmbeddedObjectData: {
36 RelocInfo rinfo(addr, RelocInfo::DATA_EMBEDDED_OBJECT, 0, Code());
37 return UpdateEmbeddedPointer(heap, &rinfo, callback);
38 }
39 case SlotType::kConstPoolEmbeddedObjectCompressed: {
40 HeapObject old_target = HeapObject::cast(Object(
41 DecompressTaggedAny(heap->isolate(), base::Memory<Tagged_t>(addr))));
42 HeapObject new_target = old_target;
43 SlotCallbackResult result = callback(FullMaybeObjectSlot(&new_target));
44 DCHECK(!HasWeakHeapObjectTag(new_target));
45 if (new_target != old_target) {
46 base::Memory<Tagged_t>(addr) = CompressTagged(new_target.ptr());
47 }
48 return result;
49 }
50 case SlotType::kConstPoolEmbeddedObjectFull: {
51 return callback(FullMaybeObjectSlot(addr));
52 }
53 case SlotType::kCleared:
54 break;
55 }
56 UNREACHABLE();
57 }
58
59 } // namespace internal
60 } // namespace v8
61 #endif // V8_HEAP_REMEMBERED_SET_INL_H_
62