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Side by Side Diff: src/objects-inl.h

Issue 955063002: Fix memory leak caused by field type in descriptor array. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Remove unused var in release. Created 5 years, 10 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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 // Review notes: 5 // Review notes:
6 // 6 //
7 // - The use of macros in these inline functions may seem superfluous 7 // - The use of macros in these inline functions may seem superfluous
8 // but it is absolutely needed to make sure gcc generates optimal 8 // but it is absolutely needed to make sure gcc generates optimal
9 // code. gcc is not happy when attempting to inline too deep. 9 // code. gcc is not happy when attempting to inline too deep.
10 // 10 //
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3129 3129
3130 3130
3131 int DescriptorArray::GetFieldIndex(int descriptor_number) { 3131 int DescriptorArray::GetFieldIndex(int descriptor_number) {
3132 DCHECK(GetDetails(descriptor_number).location() == kField); 3132 DCHECK(GetDetails(descriptor_number).location() == kField);
3133 return GetDetails(descriptor_number).field_index(); 3133 return GetDetails(descriptor_number).field_index();
3134 } 3134 }
3135 3135
3136 3136
3137 HeapType* DescriptorArray::GetFieldType(int descriptor_number) { 3137 HeapType* DescriptorArray::GetFieldType(int descriptor_number) {
3138 DCHECK(GetDetails(descriptor_number).location() == kField); 3138 DCHECK(GetDetails(descriptor_number).location() == kField);
3139 return HeapType::cast(GetValue(descriptor_number)); 3139 Object* value = GetValue(descriptor_number);
3140 if (value->IsWeakCell()) {
3141 if (WeakCell::cast(value)->cleared()) return HeapType::Any();
3142 value = WeakCell::cast(value)->value();
3143 }
3144 return HeapType::cast(value);
3140 } 3145 }
3141 3146
3142 3147
3143 Object* DescriptorArray::GetConstant(int descriptor_number) { 3148 Object* DescriptorArray::GetConstant(int descriptor_number) {
3144 return GetValue(descriptor_number); 3149 return GetValue(descriptor_number);
3145 } 3150 }
3146 3151
3147 3152
3148 Object* DescriptorArray::GetCallbacksObject(int descriptor_number) { 3153 Object* DescriptorArray::GetCallbacksObject(int descriptor_number) {
3149 DCHECK(GetType(descriptor_number) == ACCESSOR_CONSTANT); 3154 DCHECK(GetType(descriptor_number) == ACCESSOR_CONSTANT);
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7629 #undef READ_SHORT_FIELD 7634 #undef READ_SHORT_FIELD
7630 #undef WRITE_SHORT_FIELD 7635 #undef WRITE_SHORT_FIELD
7631 #undef READ_BYTE_FIELD 7636 #undef READ_BYTE_FIELD
7632 #undef WRITE_BYTE_FIELD 7637 #undef WRITE_BYTE_FIELD
7633 #undef NOBARRIER_READ_BYTE_FIELD 7638 #undef NOBARRIER_READ_BYTE_FIELD
7634 #undef NOBARRIER_WRITE_BYTE_FIELD 7639 #undef NOBARRIER_WRITE_BYTE_FIELD
7635 7640
7636 } } // namespace v8::internal 7641 } } // namespace v8::internal
7637 7642
7638 #endif // V8_OBJECTS_INL_H_ 7643 #endif // V8_OBJECTS_INL_H_
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