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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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5089 CHECK(!weak_prototype->cleared()); | 5089 CHECK(!weak_prototype->cleared()); |
5090 // Change the map of a.x and make the previous map garbage collectable. | 5090 // Change the map of a.x and make the previous map garbage collectable. |
5091 CompileRun("a.x.__proto__ = {};"); | 5091 CompileRun("a.x.__proto__ = {};"); |
5092 for (int i = 0; i < 4; i++) { | 5092 for (int i = 0; i < 4; i++) { |
5093 heap->CollectAllGarbage(Heap::kNoGCFlags); | 5093 heap->CollectAllGarbage(Heap::kNoGCFlags); |
5094 } | 5094 } |
5095 CHECK(weak_prototype->cleared()); | 5095 CHECK(weak_prototype->cleared()); |
5096 } | 5096 } |
5097 | 5097 |
5098 | 5098 |
5099 void CheckMapRetainingFor(int n) { | 5099 Handle<WeakCell> AddRetainedMap(Isolate* isolate, Heap* heap) { |
5100 FLAG_retain_maps_for_n_gc = n; | |
5101 Isolate* isolate = CcTest::i_isolate(); | |
5102 Heap* heap = isolate->heap(); | |
5103 Handle<WeakCell> weak_cell; | |
5104 { | |
5105 HandleScope inner_scope(isolate); | 5100 HandleScope inner_scope(isolate); |
5106 Handle<Map> map = Map::Create(isolate, 1); | 5101 Handle<Map> map = Map::Create(isolate, 1); |
5107 v8::Local<v8::Value> result = | 5102 v8::Local<v8::Value> result = |
5108 CompileRun("(function () { return {x : 10}; })();"); | 5103 CompileRun("(function () { return {x : 10}; })();"); |
5109 Handle<JSObject> proto = | 5104 Handle<JSObject> proto = |
5110 v8::Utils::OpenHandle(*v8::Handle<v8::Object>::Cast(result)); | 5105 v8::Utils::OpenHandle(*v8::Handle<v8::Object>::Cast(result)); |
5111 map->set_prototype(*proto); | 5106 map->set_prototype(*proto); |
5112 heap->AddRetainedMap(map); | 5107 heap->AddRetainedMap(map); |
5113 weak_cell = inner_scope.CloseAndEscape(Map::WeakCellForMap(map)); | 5108 return inner_scope.CloseAndEscape(Map::WeakCellForMap(map)); |
5114 } | 5109 } |
| 5110 |
| 5111 |
| 5112 void CheckMapRetainingFor(int n) { |
| 5113 FLAG_retain_maps_for_n_gc = n; |
| 5114 Isolate* isolate = CcTest::i_isolate(); |
| 5115 Heap* heap = isolate->heap(); |
| 5116 Handle<WeakCell> weak_cell = AddRetainedMap(isolate, heap); |
5115 CHECK(!weak_cell->cleared()); | 5117 CHECK(!weak_cell->cleared()); |
5116 for (int i = 0; i < n; i++) { | 5118 for (int i = 0; i < n; i++) { |
5117 heap->CollectGarbage(OLD_POINTER_SPACE); | 5119 heap->CollectGarbage(OLD_POINTER_SPACE); |
5118 } | 5120 } |
5119 CHECK(!weak_cell->cleared()); | 5121 CHECK(!weak_cell->cleared()); |
5120 heap->CollectGarbage(OLD_POINTER_SPACE); | 5122 heap->CollectGarbage(OLD_POINTER_SPACE); |
5121 CHECK(weak_cell->cleared()); | 5123 CHECK(weak_cell->cleared()); |
5122 } | 5124 } |
5123 | 5125 |
5124 | 5126 |
5125 TEST(MapRetaining) { | 5127 TEST(MapRetaining) { |
5126 CcTest::InitializeVM(); | 5128 CcTest::InitializeVM(); |
5127 v8::HandleScope scope(CcTest::isolate()); | 5129 v8::HandleScope scope(CcTest::isolate()); |
5128 CheckMapRetainingFor(FLAG_retain_maps_for_n_gc); | 5130 CheckMapRetainingFor(FLAG_retain_maps_for_n_gc); |
5129 CheckMapRetainingFor(0); | 5131 CheckMapRetainingFor(0); |
5130 CheckMapRetainingFor(1); | 5132 CheckMapRetainingFor(1); |
5131 CheckMapRetainingFor(7); | 5133 CheckMapRetainingFor(7); |
5132 } | 5134 } |
5133 | 5135 |
5134 | 5136 |
| 5137 TEST(RegressArrayListGC) { |
| 5138 FLAG_retain_maps_for_n_gc = 1; |
| 5139 FLAG_incremental_marking = 0; |
| 5140 FLAG_gc_global = true; |
| 5141 CcTest::InitializeVM(); |
| 5142 v8::HandleScope scope(CcTest::isolate()); |
| 5143 Isolate* isolate = CcTest::i_isolate(); |
| 5144 Heap* heap = isolate->heap(); |
| 5145 AddRetainedMap(isolate, heap); |
| 5146 Handle<Map> map = Map::Create(isolate, 1); |
| 5147 heap->CollectGarbage(OLD_POINTER_SPACE); |
| 5148 // Force GC in old space on next addition of retained map. |
| 5149 Map::WeakCellForMap(map); |
| 5150 SimulateFullSpace(CcTest::heap()->new_space()); |
| 5151 for (int i = 0; i < 10; i++) { |
| 5152 heap->AddRetainedMap(map); |
| 5153 } |
| 5154 heap->CollectGarbage(OLD_POINTER_SPACE); |
| 5155 } |
| 5156 |
| 5157 |
5135 #ifdef DEBUG | 5158 #ifdef DEBUG |
5136 TEST(PathTracer) { | 5159 TEST(PathTracer) { |
5137 CcTest::InitializeVM(); | 5160 CcTest::InitializeVM(); |
5138 v8::HandleScope scope(CcTest::isolate()); | 5161 v8::HandleScope scope(CcTest::isolate()); |
5139 | 5162 |
5140 v8::Local<v8::Value> result = CompileRun("'abc'"); | 5163 v8::Local<v8::Value> result = CompileRun("'abc'"); |
5141 Handle<Object> o = v8::Utils::OpenHandle(*result); | 5164 Handle<Object> o = v8::Utils::OpenHandle(*result); |
5142 CcTest::i_isolate()->heap()->TracePathToObject(*o); | 5165 CcTest::i_isolate()->heap()->TracePathToObject(*o); |
5143 } | 5166 } |
5144 #endif // DEBUG | 5167 #endif // DEBUG |
5145 | 5168 |
5146 | 5169 |
5147 TEST(WritableVsImmortalRoots) { | 5170 TEST(WritableVsImmortalRoots) { |
5148 for (int i = 0; i < Heap::kStrongRootListLength; ++i) { | 5171 for (int i = 0; i < Heap::kStrongRootListLength; ++i) { |
5149 Heap::RootListIndex root_index = static_cast<Heap::RootListIndex>(i); | 5172 Heap::RootListIndex root_index = static_cast<Heap::RootListIndex>(i); |
5150 bool writable = Heap::RootCanBeWrittenAfterInitialization(root_index); | 5173 bool writable = Heap::RootCanBeWrittenAfterInitialization(root_index); |
5151 bool immortal = Heap::RootIsImmortalImmovable(root_index); | 5174 bool immortal = Heap::RootIsImmortalImmovable(root_index); |
5152 // A root value can be writable, immortal, or neither, but not both. | 5175 // A root value can be writable, immortal, or neither, but not both. |
5153 CHECK(!immortal || !writable); | 5176 CHECK(!immortal || !writable); |
5154 } | 5177 } |
5155 } | 5178 } |
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