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
11namespace v8 {
12namespace internal {
13
14template <typename Callback>
15SlotCallbackResult 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