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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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288 return Failure::RetryAfterGC(identity()); | 288 return Failure::RetryAfterGC(identity()); |
289 } | 289 } |
290 | 290 |
291 | 291 |
292 // ----------------------------------------------------------------------------- | 292 // ----------------------------------------------------------------------------- |
293 // NewSpace | 293 // NewSpace |
294 | 294 |
295 | 295 |
296 MaybeObject* NewSpace::AllocateRaw(int size_in_bytes) { | 296 MaybeObject* NewSpace::AllocateRaw(int size_in_bytes) { |
297 Address old_top = allocation_info_.top; | 297 Address old_top = allocation_info_.top; |
298 #ifdef DEBUG | |
299 if (FLAG_stress_compaction) { | |
300 if (allocation_info_.limit - old_top >= size_in_bytes * 4) { | |
Michael Starzinger
2012/04/24 11:39:15
Could you add a one-liner comment why it helps to
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301 int filler_size = size_in_bytes * 4; | |
302 for (int i = 0; i < filler_size; i += kPointerSize) { | |
303 *(reinterpret_cast<Object**>(old_top + i)) = | |
304 HEAP->one_pointer_filler_map(); | |
305 } | |
306 old_top += filler_size; | |
307 allocation_info_.top += filler_size; | |
308 } | |
309 } | |
310 #endif | |
311 | |
298 if (allocation_info_.limit - old_top < size_in_bytes) { | 312 if (allocation_info_.limit - old_top < size_in_bytes) { |
299 return SlowAllocateRaw(size_in_bytes); | 313 return SlowAllocateRaw(size_in_bytes); |
300 } | 314 } |
301 | 315 |
302 Object* obj = HeapObject::FromAddress(allocation_info_.top); | 316 Object* obj = HeapObject::FromAddress(old_top); |
303 allocation_info_.top += size_in_bytes; | 317 allocation_info_.top += size_in_bytes; |
304 ASSERT_SEMISPACE_ALLOCATION_INFO(allocation_info_, to_space_); | 318 ASSERT_SEMISPACE_ALLOCATION_INFO(allocation_info_, to_space_); |
305 | 319 |
306 return obj; | 320 return obj; |
307 } | 321 } |
308 | 322 |
309 | 323 |
310 LargePage* LargePage::Initialize(Heap* heap, MemoryChunk* chunk) { | 324 LargePage* LargePage::Initialize(Heap* heap, MemoryChunk* chunk) { |
311 heap->incremental_marking()->SetOldSpacePageFlags(chunk); | 325 heap->incremental_marking()->SetOldSpacePageFlags(chunk); |
312 return static_cast<LargePage*>(chunk); | 326 return static_cast<LargePage*>(chunk); |
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339 Map* map = object->map(); | 353 Map* map = object->map(); |
340 Heap* heap = object->GetHeap(); | 354 Heap* heap = object->GetHeap(); |
341 return map == heap->raw_unchecked_free_space_map() | 355 return map == heap->raw_unchecked_free_space_map() |
342 || map == heap->raw_unchecked_one_pointer_filler_map() | 356 || map == heap->raw_unchecked_one_pointer_filler_map() |
343 || map == heap->raw_unchecked_two_pointer_filler_map(); | 357 || map == heap->raw_unchecked_two_pointer_filler_map(); |
344 } | 358 } |
345 | 359 |
346 } } // namespace v8::internal | 360 } } // namespace v8::internal |
347 | 361 |
348 #endif // V8_SPACES_INL_H_ | 362 #endif // V8_SPACES_INL_H_ |
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