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Issue 2949803002: New growth strategy for growable arrays (Closed)
Patch Set: Branch-free grow size computation. Renamed function names to be clearer. Created 3 years, 6 months ago
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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/gc_sweeper.h" 5 #include "vm/gc_sweeper.h"
6 6
7 #include "vm/freelist.h" 7 #include "vm/freelist.h"
8 #include "vm/globals.h" 8 #include "vm/globals.h"
9 #include "vm/heap.h" 9 #include "vm/heap.h"
10 #include "vm/lockers.h" 10 #include "vm/lockers.h"
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74 74
75 75
76 intptr_t GCSweeper::SweepLargePage(HeapPage* page) { 76 intptr_t GCSweeper::SweepLargePage(HeapPage* page) {
77 intptr_t words_to_end = 0; 77 intptr_t words_to_end = 0;
78 RawObject* raw_obj = RawObject::FromAddr(page->object_start()); 78 RawObject* raw_obj = RawObject::FromAddr(page->object_start());
79 if (raw_obj->IsMarked()) { 79 if (raw_obj->IsMarked()) {
80 raw_obj->ClearMarkBit(); 80 raw_obj->ClearMarkBit();
81 words_to_end = (raw_obj->Size() >> kWordSizeLog2); 81 words_to_end = (raw_obj->Size() >> kWordSizeLog2);
82 } 82 }
83 #ifdef DEBUG 83 #ifdef DEBUG
84 // String::MakeExternal and Array::MakeArray create trailing filler objects, 84 // String::MakeExternal and Array::MakeFixedLength create trailing filler
85 // but they are always unreachable. Verify that they are not marked. 85 // objects, but they are always unreachable. Verify that they are not marked.
86 uword current = RawObject::ToAddr(raw_obj) + raw_obj->Size(); 86 uword current = RawObject::ToAddr(raw_obj) + raw_obj->Size();
87 uword end = page->object_end(); 87 uword end = page->object_end();
88 while (current < end) { 88 while (current < end) {
89 RawObject* cur_obj = RawObject::FromAddr(current); 89 RawObject* cur_obj = RawObject::FromAddr(current);
90 ASSERT(!cur_obj->IsMarked()); 90 ASSERT(!cur_obj->IsMarked());
91 intptr_t obj_size = cur_obj->Size(); 91 intptr_t obj_size = cur_obj->Size();
92 memset(reinterpret_cast<void*>(current), Heap::kZapByte, obj_size); 92 memset(reinterpret_cast<void*>(current), Heap::kZapByte, obj_size);
93 current += obj_size; 93 current += obj_size;
94 } 94 }
95 #endif // DEBUG 95 #endif // DEBUG
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173 HeapPage* first, 173 HeapPage* first,
174 HeapPage* last, 174 HeapPage* last,
175 FreeList* freelist) { 175 FreeList* freelist) {
176 SweeperTask* task = new SweeperTask(isolate, isolate->heap()->old_space(), 176 SweeperTask* task = new SweeperTask(isolate, isolate->heap()->old_space(),
177 first, last, freelist); 177 first, last, freelist);
178 ThreadPool* pool = Dart::thread_pool(); 178 ThreadPool* pool = Dart::thread_pool();
179 pool->Run(task); 179 pool->Run(task);
180 } 180 }
181 181
182 } // namespace dart 182 } // namespace dart
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