1 // Copyright 2020 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 #include "src/heap/cppgc/heap-object-header.h" 6 7 #include "include/cppgc/internal/api-constants.h" 8 #include "src/base/macros.h" 9 #include "src/base/sanitizer/asan.h" 10 #include "src/heap/cppgc/gc-info-table.h" 11 #include "src/heap/cppgc/heap-page.h" 12 13 namespace cppgc { 14 namespace internal { 15 16 STATIC_ASSERT((kAllocationGranularity % sizeof(HeapObjectHeader)) == 0); 17 CheckApiConstants()18void HeapObjectHeader::CheckApiConstants() { 19 STATIC_ASSERT(api_constants::kFullyConstructedBitMask == 20 FullyConstructedField::kMask); 21 STATIC_ASSERT(api_constants::kFullyConstructedBitFieldOffsetFromPayload == 22 (sizeof(encoded_high_) + sizeof(encoded_low_))); 23 } 24 Finalize()25void HeapObjectHeader::Finalize() { 26 #ifdef V8_USE_ADDRESS_SANITIZER 27 const size_t size = 28 IsLargeObject() 29 ? LargePage::From(BasePage::FromPayload(this))->ObjectSize() 30 : ObjectSize(); 31 ASAN_UNPOISON_MEMORY_REGION(ObjectStart(), size); 32 #endif // V8_USE_ADDRESS_SANITIZER 33 const GCInfo& gc_info = GlobalGCInfoTable::GCInfoFromIndex(GetGCInfoIndex()); 34 if (gc_info.finalize) { 35 gc_info.finalize(ObjectStart()); 36 } 37 } 38 GetName() const39HeapObjectName HeapObjectHeader::GetName() const { 40 const GCInfo& gc_info = GlobalGCInfoTable::GCInfoFromIndex(GetGCInfoIndex()); 41 return gc_info.name(ObjectStart()); 42 } 43 44 } // namespace internal 45 } // namespace cppgc 46