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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/heap/objects-visiting.h" | 5 #include "src/heap/objects-visiting.h" |
6 | 6 |
7 #include "src/heap/heap-inl.h" | 7 #include "src/heap/heap-inl.h" |
8 #include "src/heap/mark-compact-inl.h" | 8 #include "src/heap/mark-compact-inl.h" |
9 #include "src/heap/objects-visiting-inl.h" | 9 #include "src/heap/objects-visiting-inl.h" |
10 | 10 |
11 namespace v8 { | 11 namespace v8 { |
12 namespace internal { | 12 namespace internal { |
13 | 13 |
| 14 VisitorId StaticVisitorBase::GetVisitorId(Map* map) { |
| 15 return GetVisitorId(map->instance_type(), map->instance_size(), |
| 16 FLAG_unbox_double_fields && !map->HasFastPointerLayout()); |
| 17 } |
| 18 |
| 19 VisitorId StaticVisitorBase::GetVisitorId(int instance_type, int instance_size, |
| 20 bool has_unboxed_fields) { |
| 21 if (instance_type < FIRST_NONSTRING_TYPE) { |
| 22 switch (instance_type & kStringRepresentationMask) { |
| 23 case kSeqStringTag: |
| 24 if ((instance_type & kStringEncodingMask) == kOneByteStringTag) { |
| 25 return kVisitSeqOneByteString; |
| 26 } else { |
| 27 return kVisitSeqTwoByteString; |
| 28 } |
| 29 |
| 30 case kConsStringTag: |
| 31 if (IsShortcutCandidate(instance_type)) { |
| 32 return kVisitShortcutCandidate; |
| 33 } else { |
| 34 return kVisitConsString; |
| 35 } |
| 36 |
| 37 case kSlicedStringTag: |
| 38 return kVisitSlicedString; |
| 39 |
| 40 case kExternalStringTag: |
| 41 return kVisitDataObject; |
| 42 |
| 43 case kThinStringTag: |
| 44 return kVisitThinString; |
| 45 } |
| 46 UNREACHABLE(); |
| 47 } |
| 48 |
| 49 switch (instance_type) { |
| 50 case BYTE_ARRAY_TYPE: |
| 51 return kVisitByteArray; |
| 52 |
| 53 case BYTECODE_ARRAY_TYPE: |
| 54 return kVisitBytecodeArray; |
| 55 |
| 56 case FREE_SPACE_TYPE: |
| 57 return kVisitFreeSpace; |
| 58 |
| 59 case FIXED_ARRAY_TYPE: |
| 60 return kVisitFixedArray; |
| 61 |
| 62 case FIXED_DOUBLE_ARRAY_TYPE: |
| 63 return kVisitFixedDoubleArray; |
| 64 |
| 65 case ODDBALL_TYPE: |
| 66 return kVisitOddball; |
| 67 |
| 68 case MAP_TYPE: |
| 69 return kVisitMap; |
| 70 |
| 71 case CODE_TYPE: |
| 72 return kVisitCode; |
| 73 |
| 74 case CELL_TYPE: |
| 75 return kVisitCell; |
| 76 |
| 77 case PROPERTY_CELL_TYPE: |
| 78 return kVisitPropertyCell; |
| 79 |
| 80 case WEAK_CELL_TYPE: |
| 81 return kVisitWeakCell; |
| 82 |
| 83 case TRANSITION_ARRAY_TYPE: |
| 84 return kVisitTransitionArray; |
| 85 |
| 86 case JS_WEAK_MAP_TYPE: |
| 87 case JS_WEAK_SET_TYPE: |
| 88 return kVisitJSWeakCollection; |
| 89 |
| 90 case JS_REGEXP_TYPE: |
| 91 return kVisitJSRegExp; |
| 92 |
| 93 case SHARED_FUNCTION_INFO_TYPE: |
| 94 return kVisitSharedFunctionInfo; |
| 95 |
| 96 case JS_PROXY_TYPE: |
| 97 return kVisitStruct; |
| 98 |
| 99 case SYMBOL_TYPE: |
| 100 return kVisitSymbol; |
| 101 |
| 102 case JS_ARRAY_BUFFER_TYPE: |
| 103 return kVisitJSArrayBuffer; |
| 104 |
| 105 case SMALL_ORDERED_HASH_MAP_TYPE: |
| 106 return kVisitSmallOrderedHashMap; |
| 107 |
| 108 case SMALL_ORDERED_HASH_SET_TYPE: |
| 109 return kVisitSmallOrderedHashSet; |
| 110 |
| 111 case JS_OBJECT_TYPE: |
| 112 case JS_ERROR_TYPE: |
| 113 case JS_ARGUMENTS_TYPE: |
| 114 case JS_ASYNC_FROM_SYNC_ITERATOR_TYPE: |
| 115 case JS_CONTEXT_EXTENSION_OBJECT_TYPE: |
| 116 case JS_GENERATOR_OBJECT_TYPE: |
| 117 case JS_ASYNC_GENERATOR_OBJECT_TYPE: |
| 118 case JS_MODULE_NAMESPACE_TYPE: |
| 119 case JS_VALUE_TYPE: |
| 120 case JS_DATE_TYPE: |
| 121 case JS_ARRAY_TYPE: |
| 122 case JS_GLOBAL_PROXY_TYPE: |
| 123 case JS_GLOBAL_OBJECT_TYPE: |
| 124 case JS_MESSAGE_OBJECT_TYPE: |
| 125 case JS_TYPED_ARRAY_TYPE: |
| 126 case JS_DATA_VIEW_TYPE: |
| 127 case JS_SET_TYPE: |
| 128 case JS_MAP_TYPE: |
| 129 case JS_SET_ITERATOR_TYPE: |
| 130 case JS_MAP_ITERATOR_TYPE: |
| 131 case JS_STRING_ITERATOR_TYPE: |
| 132 |
| 133 case JS_TYPED_ARRAY_KEY_ITERATOR_TYPE: |
| 134 case JS_FAST_ARRAY_KEY_ITERATOR_TYPE: |
| 135 case JS_GENERIC_ARRAY_KEY_ITERATOR_TYPE: |
| 136 case JS_UINT8_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 137 case JS_INT8_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 138 case JS_UINT16_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 139 case JS_INT16_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 140 case JS_UINT32_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 141 case JS_INT32_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 142 case JS_FLOAT32_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 143 case JS_FLOAT64_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 144 case JS_UINT8_CLAMPED_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 145 case JS_FAST_SMI_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 146 case JS_FAST_HOLEY_SMI_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 147 case JS_FAST_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 148 case JS_FAST_HOLEY_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 149 case JS_FAST_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 150 case JS_FAST_HOLEY_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 151 case JS_GENERIC_ARRAY_KEY_VALUE_ITERATOR_TYPE: |
| 152 case JS_UINT8_ARRAY_VALUE_ITERATOR_TYPE: |
| 153 case JS_INT8_ARRAY_VALUE_ITERATOR_TYPE: |
| 154 case JS_UINT16_ARRAY_VALUE_ITERATOR_TYPE: |
| 155 case JS_INT16_ARRAY_VALUE_ITERATOR_TYPE: |
| 156 case JS_UINT32_ARRAY_VALUE_ITERATOR_TYPE: |
| 157 case JS_INT32_ARRAY_VALUE_ITERATOR_TYPE: |
| 158 case JS_FLOAT32_ARRAY_VALUE_ITERATOR_TYPE: |
| 159 case JS_FLOAT64_ARRAY_VALUE_ITERATOR_TYPE: |
| 160 case JS_UINT8_CLAMPED_ARRAY_VALUE_ITERATOR_TYPE: |
| 161 case JS_FAST_SMI_ARRAY_VALUE_ITERATOR_TYPE: |
| 162 case JS_FAST_HOLEY_SMI_ARRAY_VALUE_ITERATOR_TYPE: |
| 163 case JS_FAST_ARRAY_VALUE_ITERATOR_TYPE: |
| 164 case JS_FAST_HOLEY_ARRAY_VALUE_ITERATOR_TYPE: |
| 165 case JS_FAST_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE: |
| 166 case JS_FAST_HOLEY_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE: |
| 167 case JS_GENERIC_ARRAY_VALUE_ITERATOR_TYPE: |
| 168 |
| 169 case JS_PROMISE_CAPABILITY_TYPE: |
| 170 case JS_PROMISE_TYPE: |
| 171 case JS_BOUND_FUNCTION_TYPE: |
| 172 return has_unboxed_fields ? kVisitJSObject : kVisitJSObjectFast; |
| 173 case JS_API_OBJECT_TYPE: |
| 174 case JS_SPECIAL_API_OBJECT_TYPE: |
| 175 return kVisitJSApiObject; |
| 176 |
| 177 case JS_FUNCTION_TYPE: |
| 178 return kVisitJSFunction; |
| 179 |
| 180 case FILLER_TYPE: |
| 181 case FOREIGN_TYPE: |
| 182 case HEAP_NUMBER_TYPE: |
| 183 case MUTABLE_HEAP_NUMBER_TYPE: |
| 184 return kVisitDataObject; |
| 185 |
| 186 case FIXED_UINT8_ARRAY_TYPE: |
| 187 case FIXED_INT8_ARRAY_TYPE: |
| 188 case FIXED_UINT16_ARRAY_TYPE: |
| 189 case FIXED_INT16_ARRAY_TYPE: |
| 190 case FIXED_UINT32_ARRAY_TYPE: |
| 191 case FIXED_INT32_ARRAY_TYPE: |
| 192 case FIXED_FLOAT32_ARRAY_TYPE: |
| 193 case FIXED_UINT8_CLAMPED_ARRAY_TYPE: |
| 194 return kVisitFixedTypedArrayBase; |
| 195 |
| 196 case FIXED_FLOAT64_ARRAY_TYPE: |
| 197 return kVisitFixedFloat64Array; |
| 198 |
| 199 #define MAKE_STRUCT_CASE(NAME, Name, name) case NAME##_TYPE: |
| 200 STRUCT_LIST(MAKE_STRUCT_CASE) |
| 201 #undef MAKE_STRUCT_CASE |
| 202 if (instance_type == ALLOCATION_SITE_TYPE) { |
| 203 return kVisitAllocationSite; |
| 204 } |
| 205 |
| 206 return kVisitStruct; |
| 207 |
| 208 default: |
| 209 UNREACHABLE(); |
| 210 } |
| 211 } |
| 212 |
14 | 213 |
15 // We don't record weak slots during marking or scavenges. Instead we do it | 214 // We don't record weak slots during marking or scavenges. Instead we do it |
16 // once when we complete mark-compact cycle. Note that write barrier has no | 215 // once when we complete mark-compact cycle. Note that write barrier has no |
17 // effect if we are already in the middle of compacting mark-sweep cycle and we | 216 // effect if we are already in the middle of compacting mark-sweep cycle and we |
18 // have to record slots manually. | 217 // have to record slots manually. |
19 static bool MustRecordSlots(Heap* heap) { | 218 static bool MustRecordSlots(Heap* heap) { |
20 return heap->gc_state() == Heap::MARK_COMPACT && | 219 return heap->gc_state() == Heap::MARK_COMPACT && |
21 heap->mark_compact_collector()->is_compacting(); | 220 heap->mark_compact_collector()->is_compacting(); |
22 } | 221 } |
23 | 222 |
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198 }; | 397 }; |
199 | 398 |
200 | 399 |
201 template Object* VisitWeakList<Context>(Heap* heap, Object* list, | 400 template Object* VisitWeakList<Context>(Heap* heap, Object* list, |
202 WeakObjectRetainer* retainer); | 401 WeakObjectRetainer* retainer); |
203 | 402 |
204 template Object* VisitWeakList<AllocationSite>(Heap* heap, Object* list, | 403 template Object* VisitWeakList<AllocationSite>(Heap* heap, Object* list, |
205 WeakObjectRetainer* retainer); | 404 WeakObjectRetainer* retainer); |
206 } // namespace internal | 405 } // namespace internal |
207 } // namespace v8 | 406 } // namespace v8 |
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