1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_GC_ACCOUNTING_MOD_UNION_TABLE_INL_H_ 18 #define ART_RUNTIME_GC_ACCOUNTING_MOD_UNION_TABLE_INL_H_ 19 20 #include "mod_union_table.h" 21 22 #include "gc/space/space.h" 23 24 namespace art { 25 namespace gc { 26 namespace accounting { 27 28 // A mod-union table to record image references to the Zygote and alloc space. 29 class ModUnionTableToZygoteAllocspace : public ModUnionTableReferenceCache { 30 public: 31 explicit ModUnionTableToZygoteAllocspace(Heap* heap) : ModUnionTableReferenceCache(heap) {} 32 33 bool AddReference(const mirror::Object* /* obj */, const mirror::Object* ref) { 34 const std::vector<space::ContinuousSpace*>& spaces = GetHeap()->GetContinuousSpaces(); 35 typedef std::vector<space::ContinuousSpace*>::const_iterator It; 36 for (It it = spaces.begin(); it != spaces.end(); ++it) { 37 if ((*it)->Contains(ref)) { 38 return (*it)->IsDlMallocSpace(); 39 } 40 } 41 // Assume it points to a large object. 42 // TODO: Check. 43 return true; 44 } 45 }; 46 47 // A mod-union table to record Zygote references to the alloc space. 48 class ModUnionTableToAllocspace : public ModUnionTableReferenceCache { 49 public: 50 explicit ModUnionTableToAllocspace(Heap* heap) : ModUnionTableReferenceCache(heap) {} 51 52 bool AddReference(const mirror::Object* /* obj */, const mirror::Object* ref) { 53 const std::vector<space::ContinuousSpace*>& spaces = GetHeap()->GetContinuousSpaces(); 54 typedef std::vector<space::ContinuousSpace*>::const_iterator It; 55 for (It it = spaces.begin(); it != spaces.end(); ++it) { 56 space::ContinuousSpace* space = *it; 57 if (space->Contains(ref)) { 58 // The allocation space is always considered for collection whereas the Zygote space is 59 // 60 return space->GetGcRetentionPolicy() == space::kGcRetentionPolicyAlwaysCollect; 61 } 62 } 63 // Assume it points to a large object. 64 // TODO: Check. 65 return true; 66 } 67 }; 68 69 } // namespace accounting 70 } // namespace gc 71 } // namespace art 72 73 #endif // ART_RUNTIME_GC_ACCOUNTING_MOD_UNION_TABLE_INL_H_ 74
