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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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698 static Object* ToBoolean(bool condition) { | 698 static Object* ToBoolean(bool condition) { |
699 return condition ? true_value() : false_value(); | 699 return condition ? true_value() : false_value(); |
700 } | 700 } |
701 | 701 |
702 // Code that should be run before and after each GC. Includes some | 702 // Code that should be run before and after each GC. Includes some |
703 // reporting/verification activities when compiled with DEBUG set. | 703 // reporting/verification activities when compiled with DEBUG set. |
704 static void GarbageCollectionPrologue(); | 704 static void GarbageCollectionPrologue(); |
705 static void GarbageCollectionEpilogue(); | 705 static void GarbageCollectionEpilogue(); |
706 | 706 |
707 // Performs garbage collection operation. | 707 // Performs garbage collection operation. |
708 // Returns whether required_space bytes are available after the collection. | 708 // Returns whether there is a chance that another major GC could |
709 static void CollectGarbage(AllocationSpace space); | 709 // collect more garbage. |
| 710 static bool CollectGarbage(AllocationSpace space, GarbageCollector collector); |
| 711 |
| 712 // Performs garbage collection operation. |
| 713 // Returns whether there is a chance that another major GC could |
| 714 // collect more garbage. |
| 715 inline static bool CollectGarbage(AllocationSpace space); |
710 | 716 |
711 // Performs a full garbage collection. Force compaction if the | 717 // Performs a full garbage collection. Force compaction if the |
712 // parameter is true. | 718 // parameter is true. |
713 static void CollectAllGarbage(bool force_compaction); | 719 static void CollectAllGarbage(bool force_compaction); |
714 | 720 |
| 721 // Last hope GC, should try to squeeze as much as possible. |
| 722 static void CollectAllAvailableGarbage(); |
| 723 |
715 // Notify the heap that a context has been disposed. | 724 // Notify the heap that a context has been disposed. |
716 static int NotifyContextDisposed() { return ++contexts_disposed_; } | 725 static int NotifyContextDisposed() { return ++contexts_disposed_; } |
717 | 726 |
718 // Utility to invoke the scavenger. This is needed in test code to | 727 // Utility to invoke the scavenger. This is needed in test code to |
719 // ensure correct callback for weak global handles. | 728 // ensure correct callback for weak global handles. |
720 static void PerformScavenge(); | 729 static void PerformScavenge(); |
721 | 730 |
722 #ifdef DEBUG | 731 #ifdef DEBUG |
723 // Utility used with flag gc-greedy. | 732 // Utility used with flag gc-greedy. |
724 static void GarbageCollectionGreedyCheck(); | 733 static void GarbageCollectionGreedyCheck(); |
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1239 static void MarkMapPointersAsEncoded(bool encoded) { | 1248 static void MarkMapPointersAsEncoded(bool encoded) { |
1240 gc_safe_size_of_old_object_ = encoded | 1249 gc_safe_size_of_old_object_ = encoded |
1241 ? &GcSafeSizeOfOldObjectWithEncodedMap | 1250 ? &GcSafeSizeOfOldObjectWithEncodedMap |
1242 : &GcSafeSizeOfOldObject; | 1251 : &GcSafeSizeOfOldObject; |
1243 } | 1252 } |
1244 | 1253 |
1245 // Checks whether a global GC is necessary | 1254 // Checks whether a global GC is necessary |
1246 static GarbageCollector SelectGarbageCollector(AllocationSpace space); | 1255 static GarbageCollector SelectGarbageCollector(AllocationSpace space); |
1247 | 1256 |
1248 // Performs garbage collection | 1257 // Performs garbage collection |
1249 static void PerformGarbageCollection(GarbageCollector collector, | 1258 // Returns whether there is a chance another major GC could |
| 1259 // collect more garbage. |
| 1260 static bool PerformGarbageCollection(GarbageCollector collector, |
1250 GCTracer* tracer); | 1261 GCTracer* tracer); |
1251 | 1262 |
1252 // Allocate an uninitialized object in map space. The behavior is identical | 1263 // Allocate an uninitialized object in map space. The behavior is identical |
1253 // to Heap::AllocateRaw(size_in_bytes, MAP_SPACE), except that (a) it doesn't | 1264 // to Heap::AllocateRaw(size_in_bytes, MAP_SPACE), except that (a) it doesn't |
1254 // have to test the allocation space argument and (b) can reduce code size | 1265 // have to test the allocation space argument and (b) can reduce code size |
1255 // (since both AllocateRaw and AllocateRawMap are inlined). | 1266 // (since both AllocateRaw and AllocateRawMap are inlined). |
1256 MUST_USE_RESULT static inline MaybeObject* AllocateRawMap(); | 1267 MUST_USE_RESULT static inline MaybeObject* AllocateRawMap(); |
1257 | 1268 |
1258 // Allocate an uninitialized object in the global property cell space. | 1269 // Allocate an uninitialized object in the global property cell space. |
1259 MUST_USE_RESULT static inline MaybeObject* AllocateRawCell(); | 1270 MUST_USE_RESULT static inline MaybeObject* AllocateRawCell(); |
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2067 // Return whether this object should be retained. If NULL is returned the | 2078 // Return whether this object should be retained. If NULL is returned the |
2068 // object has no references. Otherwise the address of the retained object | 2079 // object has no references. Otherwise the address of the retained object |
2069 // should be returned as in some GC situations the object has been moved. | 2080 // should be returned as in some GC situations the object has been moved. |
2070 virtual Object* RetainAs(Object* object) = 0; | 2081 virtual Object* RetainAs(Object* object) = 0; |
2071 }; | 2082 }; |
2072 | 2083 |
2073 | 2084 |
2074 } } // namespace v8::internal | 2085 } } // namespace v8::internal |
2075 | 2086 |
2076 #endif // V8_HEAP_H_ | 2087 #endif // V8_HEAP_H_ |
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