1 // Copyright 2018 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_OBJECTS_FEEDBACK_CELL_INL_H_
6 #define V8_OBJECTS_FEEDBACK_CELL_INL_H_
7
8 #include "src/execution/tiering-manager.h"
9 #include "src/heap/heap-write-barrier-inl.h"
10 #include "src/objects/feedback-cell.h"
11 #include "src/objects/feedback-vector-inl.h"
12 #include "src/objects/objects-inl.h"
13 #include "src/objects/struct-inl.h"
14
15 // Has to be the last include (doesn't have include guards):
16 #include "src/objects/object-macros.h"
17
18 namespace v8 {
19 namespace internal {
20
21 #include "torque-generated/src/objects/feedback-cell-tq-inl.inc"
22
23 TQ_OBJECT_CONSTRUCTORS_IMPL(FeedbackCell)
24
RELEASE_ACQUIRE_ACCESSORS(FeedbackCell,value,HeapObject,kValueOffset)25 RELEASE_ACQUIRE_ACCESSORS(FeedbackCell, value, HeapObject, kValueOffset)
26
27 void FeedbackCell::clear_padding() {
28 if (FeedbackCell::kAlignedSize == FeedbackCell::kUnalignedSize) return;
29 DCHECK_GE(FeedbackCell::kAlignedSize, FeedbackCell::kUnalignedSize);
30 memset(reinterpret_cast<byte*>(address() + FeedbackCell::kUnalignedSize), 0,
31 FeedbackCell::kAlignedSize - FeedbackCell::kUnalignedSize);
32 }
33
reset_feedback_vector(base::Optional<std::function<void (HeapObject object,ObjectSlot slot,HeapObject target)>> gc_notify_updated_slot)34 void FeedbackCell::reset_feedback_vector(
35 base::Optional<std::function<void(HeapObject object, ObjectSlot slot,
36 HeapObject target)>>
37 gc_notify_updated_slot) {
38 SetInitialInterruptBudget();
39 if (value().IsUndefined() || value().IsClosureFeedbackCellArray()) return;
40
41 CHECK(value().IsFeedbackVector());
42 ClosureFeedbackCellArray closure_feedback_cell_array =
43 FeedbackVector::cast(value()).closure_feedback_cell_array();
44 set_value(closure_feedback_cell_array, kReleaseStore);
45 if (gc_notify_updated_slot) {
46 (*gc_notify_updated_slot)(*this, RawField(FeedbackCell::kValueOffset),
47 closure_feedback_cell_array);
48 }
49 }
50
SetInitialInterruptBudget()51 void FeedbackCell::SetInitialInterruptBudget() {
52 set_interrupt_budget(TieringManager::InitialInterruptBudget());
53 }
54
55
IncrementClosureCount(Isolate * isolate)56 void FeedbackCell::IncrementClosureCount(Isolate* isolate) {
57 ReadOnlyRoots r(isolate);
58 if (map() == r.no_closures_cell_map()) {
59 set_map(r.one_closure_cell_map());
60 } else if (map() == r.one_closure_cell_map()) {
61 set_map(r.many_closures_cell_map());
62 } else {
63 DCHECK(map() == r.many_closures_cell_map());
64 }
65 }
66
67 } // namespace internal
68 } // namespace v8
69
70 #include "src/objects/object-macros-undef.h"
71
72 #endif // V8_OBJECTS_FEEDBACK_CELL_INL_H_
73