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Side by Side Diff: src/liveobjectlist.h

Issue 7631020: Version 3.5.6. (Closed) Base URL: https://v8.googlecode.com/svn/trunk
Patch Set: Created 9 years, 4 months ago
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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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230 void VisitPointers(Object** start, Object** end) { 230 void VisitPointers(Object** start, Object** end) {
231 // Copy all HeapObject pointers in [start, end). 231 // Copy all HeapObject pointers in [start, end).
232 for (Object** p = start; p < end; p++) UpdatePointer(p); 232 for (Object** p = start; p < end; p++) UpdatePointer(p);
233 } 233 }
234 234
235 private: 235 private:
236 // Based on Heap::ScavengeObject() but only does forwarding of pointers 236 // Based on Heap::ScavengeObject() but only does forwarding of pointers
237 // to live new space objects, and not actually keep them alive. 237 // to live new space objects, and not actually keep them alive.
238 void UpdatePointer(Object** p) { 238 void UpdatePointer(Object** p) {
239 Object* object = *p; 239 Object* object = *p;
240 if (!Heap::InNewSpace(object)) return; 240 if (!HEAP->InNewSpace(object)) return;
241 241
242 HeapObject* heap_obj = HeapObject::cast(object); 242 HeapObject* heap_obj = HeapObject::cast(object);
243 ASSERT(Heap::InFromSpace(heap_obj)); 243 ASSERT(HEAP->InFromSpace(heap_obj));
244 244
245 // We use the first word (where the map pointer usually is) of a heap 245 // We use the first word (where the map pointer usually is) of a heap
246 // object to record the forwarding pointer. A forwarding pointer can 246 // object to record the forwarding pointer. A forwarding pointer can
247 // point to an old space, the code space, or the to space of the new 247 // point to an old space, the code space, or the to space of the new
248 // generation. 248 // generation.
249 MapWord first_word = heap_obj->map_word(); 249 MapWord first_word = heap_obj->map_word();
250 250
251 // If the first word is a forwarding address, the object has already been 251 // If the first word is a forwarding address, the object has already been
252 // copied. 252 // copied.
253 if (first_word.IsForwardingAddress()) { 253 if (first_word.IsForwardingAddress()) {
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313 inline static Object* PrintObj(int obj_id) { return HEAP->undefined_value(); } 313 inline static Object* PrintObj(int obj_id) { return HEAP->undefined_value(); }
314 }; 314 };
315 315
316 316
317 #endif // LIVE_OBJECT_LIST 317 #endif // LIVE_OBJECT_LIST
318 318
319 } } // namespace v8::internal 319 } } // namespace v8::internal
320 320
321 #endif // V8_LIVEOBJECTLIST_H_ 321 #endif // V8_LIVEOBJECTLIST_H_
322 322
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