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Issue 3301008: [Isolates] Add heap pointer to all maps and use map->heap() more. (Closed)
Patch Set: even more Created 10 years, 3 months ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 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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208 208
209 209
210 // Forward declaration of the GCTracer class. 210 // Forward declaration of the GCTracer class.
211 class GCTracer; 211 class GCTracer;
212 class HeapStats; 212 class HeapStats;
213 class Isolate; 213 class Isolate;
214 214
215 215
216 typedef String* (*ExternalStringTableUpdaterCallback)(Object** pointer); 216 typedef String* (*ExternalStringTableUpdaterCallback)(Object** pointer);
217 217
218 typedef bool (*DirtyRegionCallback)(Address start, 218 typedef bool (*DirtyRegionCallback)(Heap* heap,
219 Address start,
219 Address end, 220 Address end,
220 ObjectSlotCallback copy_object_func); 221 ObjectSlotCallback copy_object_func);
221 222
222 223
223 // The all static Heap captures the interface to the global object heap. 224 // The all static Heap captures the interface to the global object heap.
224 // All JavaScript contexts by this process share the same object heap. 225 // All JavaScript contexts by this process share the same object heap.
225 226
226 #ifdef DEBUG 227 #ifdef DEBUG
227 class HeapDebugUtils; 228 class HeapDebugUtils;
228 #endif 229 #endif
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864 865
865 // Iterate pointers to from semispace of new space found in memory interval 866 // Iterate pointers to from semispace of new space found in memory interval
866 // from start to end. 867 // from start to end.
867 // Update dirty marks for page containing start address. 868 // Update dirty marks for page containing start address.
868 void IterateAndMarkPointersToFromSpace(Address start, 869 void IterateAndMarkPointersToFromSpace(Address start,
869 Address end, 870 Address end,
870 ObjectSlotCallback callback); 871 ObjectSlotCallback callback);
871 872
872 // Iterate pointers to new space found in memory interval from start to end. 873 // Iterate pointers to new space found in memory interval from start to end.
873 // Return true if pointers to new space was found. 874 // Return true if pointers to new space was found.
874 static bool IteratePointersInDirtyRegion(Address start, 875 static bool IteratePointersInDirtyRegion(Heap* heap,
876 Address start,
875 Address end, 877 Address end,
876 ObjectSlotCallback callback); 878 ObjectSlotCallback callback);
877 879
878 880
879 // Iterate pointers to new space found in memory interval from start to end. 881 // Iterate pointers to new space found in memory interval from start to end.
880 // This interval is considered to belong to the map space. 882 // This interval is considered to belong to the map space.
881 // Return true if pointers to new space was found. 883 // Return true if pointers to new space was found.
882 static bool IteratePointersInDirtyMapsRegion(Address start, 884 static bool IteratePointersInDirtyMapsRegion(Heap* heap,
885 Address start,
883 Address end, 886 Address end,
884 ObjectSlotCallback callback); 887 ObjectSlotCallback callback);
885 888
886 889
887 // Returns whether the object resides in new space. 890 // Returns whether the object resides in new space.
888 inline bool InNewSpace(Object* object); 891 inline bool InNewSpace(Object* object);
889 inline bool InFromSpace(Object* object); 892 inline bool InFromSpace(Object* object);
890 inline bool InToSpace(Object* object); 893 inline bool InToSpace(Object* object);
891 894
892 // Checks whether an address/object in the heap (including auxiliary 895 // Checks whether an address/object in the heap (including auxiliary
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981 } 984 }
982 985
983 void TracePathToObject(Object* target); 986 void TracePathToObject(Object* target);
984 void TracePathToGlobal(); 987 void TracePathToGlobal();
985 #endif 988 #endif
986 989
987 // Callback function passed to Heap::Iterate etc. Copies an object if 990 // Callback function passed to Heap::Iterate etc. Copies an object if
988 // necessary, the object might be promoted to an old space. The caller must 991 // necessary, the object might be promoted to an old space. The caller must
989 // ensure the precondition that the object is (a) a heap object and (b) in 992 // ensure the precondition that the object is (a) a heap object and (b) in
990 // the heap's from space. 993 // the heap's from space.
991 static void ScavengePointer(HeapObject** p); 994 static inline void ScavengePointer(HeapObject** p);
992 inline void ScavengeObject(HeapObject** p, HeapObject* object); 995 static inline void ScavengeObject(HeapObject** p, HeapObject* object);
993 996
994 // Commits from space if it is uncommitted. 997 // Commits from space if it is uncommitted.
995 void EnsureFromSpaceIsCommitted(); 998 void EnsureFromSpaceIsCommitted();
996 999
997 // Support for partial snapshots. After calling this we can allocate a 1000 // Support for partial snapshots. After calling this we can allocate a
998 // certain number of bytes using only linear allocation (with a 1001 // certain number of bytes using only linear allocation (with a
999 // LinearAllocationScope and an AlwaysAllocateScope) without using freelists 1002 // LinearAllocationScope and an AlwaysAllocateScope) without using freelists
1000 // or causing a GC. It returns true of space was reserved or false if a GC is 1003 // or causing a GC. It returns true of space was reserved or false if a GC is
1001 // needed. For paged spaces the space requested must include the space wasted 1004 // needed. For paged spaces the space requested must include the space wasted
1002 // at the end of each page when allocating linearly. 1005 // at the end of each page when allocating linearly.
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1365 // around a GC). 1368 // around a GC).
1366 inline void CompletelyClearInstanceofCache(); 1369 inline void CompletelyClearInstanceofCache();
1367 1370
1368 #if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING) 1371 #if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
1369 // Record statistics before and after garbage collection. 1372 // Record statistics before and after garbage collection.
1370 void ReportStatisticsBeforeGC(); 1373 void ReportStatisticsBeforeGC();
1371 void ReportStatisticsAfterGC(); 1374 void ReportStatisticsAfterGC();
1372 #endif 1375 #endif
1373 1376
1374 // Slow part of scavenge object. 1377 // Slow part of scavenge object.
1375 void ScavengeObjectSlow(HeapObject** p, HeapObject* object); 1378 static void ScavengeObjectSlow(HeapObject** p, HeapObject* object);
1376 1379
1377 // Initializes a function with a shared part and prototype. 1380 // Initializes a function with a shared part and prototype.
1378 // Returns the function. 1381 // Returns the function.
1379 // Note: this code was factored out of AllocateFunction such that 1382 // Note: this code was factored out of AllocateFunction such that
1380 // other parts of the VM could use it. Specifically, a function that creates 1383 // other parts of the VM could use it. Specifically, a function that creates
1381 // instances of type JS_FUNCTION_TYPE benefit from the use of this function. 1384 // instances of type JS_FUNCTION_TYPE benefit from the use of this function.
1382 // Please note this does not perform a garbage collection. 1385 // Please note this does not perform a garbage collection.
1383 MUST_USE_RESULT inline Object* InitializeFunction(JSFunction* function, 1386 MUST_USE_RESULT inline Object* InitializeFunction(JSFunction* function,
1384 SharedFunctionInfo* shared, 1387 SharedFunctionInfo* shared,
1385 Object* prototype); 1388 Object* prototype);
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2075 SubCache* caches_[kNumberOfCaches]; 2078 SubCache* caches_[kNumberOfCaches];
2076 DISALLOW_COPY_AND_ASSIGN(TranscendentalCache); 2079 DISALLOW_COPY_AND_ASSIGN(TranscendentalCache);
2077 }; 2080 };
2078 2081
2079 2082
2080 } } // namespace v8::internal 2083 } } // namespace v8::internal
2081 2084
2082 #undef HEAP 2085 #undef HEAP
2083 2086
2084 #endif // V8_HEAP_H_ 2087 #endif // V8_HEAP_H_
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