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Issue 66993006: Make some internal Heap helpers private. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Reupload Created 7 years, 1 month ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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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610 return old_pointer_space_->allocation_limit_address(); 610 return old_pointer_space_->allocation_limit_address();
611 } 611 }
612 612
613 Address* OldDataSpaceAllocationTopAddress() { 613 Address* OldDataSpaceAllocationTopAddress() {
614 return old_data_space_->allocation_top_address(); 614 return old_data_space_->allocation_top_address();
615 } 615 }
616 Address* OldDataSpaceAllocationLimitAddress() { 616 Address* OldDataSpaceAllocationLimitAddress() {
617 return old_data_space_->allocation_limit_address(); 617 return old_data_space_->allocation_limit_address();
618 } 618 }
619 619
620 // Uncommit unused semi space.
621 bool UncommitFromSpace() { return new_space_.UncommitFromSpace(); }
622
623 // Allocates and initializes a new JavaScript object based on a 620 // Allocates and initializes a new JavaScript object based on a
624 // constructor. 621 // constructor.
625 // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation 622 // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
626 // failed. 623 // failed.
627 // Please note this does not perform a garbage collection. 624 // Please note this does not perform a garbage collection.
628 MUST_USE_RESULT MaybeObject* AllocateJSObject( 625 MUST_USE_RESULT MaybeObject* AllocateJSObject(
629 JSFunction* constructor, 626 JSFunction* constructor,
630 PretenureFlag pretenure = NOT_TENURED); 627 PretenureFlag pretenure = NOT_TENURED);
631 628
632 MUST_USE_RESULT MaybeObject* AllocateJSObjectWithAllocationSite( 629 MUST_USE_RESULT MaybeObject* AllocateJSObjectWithAllocationSite(
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1168 // Returns a failure in case it was decided that flattening was 1165 // Returns a failure in case it was decided that flattening was
1169 // necessary and failed. Note, if flattening is not necessary the 1166 // necessary and failed. Note, if flattening is not necessary the
1170 // string might stay non-flat even when not a failure is returned. 1167 // string might stay non-flat even when not a failure is returned.
1171 // 1168 //
1172 // Please note this function does not perform a garbage collection. 1169 // Please note this function does not perform a garbage collection.
1173 MUST_USE_RESULT inline MaybeObject* PrepareForCompare(String* str); 1170 MUST_USE_RESULT inline MaybeObject* PrepareForCompare(String* str);
1174 1171
1175 // Converts the given boolean condition to JavaScript boolean value. 1172 // Converts the given boolean condition to JavaScript boolean value.
1176 inline Object* ToBoolean(bool condition); 1173 inline Object* ToBoolean(bool condition);
1177 1174
1178 // Code that should be run before and after each GC. Includes some
1179 // reporting/verification activities when compiled with DEBUG set.
1180 void GarbageCollectionPrologue();
1181 void GarbageCollectionEpilogue();
1182
1183 // Performs garbage collection operation. 1175 // Performs garbage collection operation.
1184 // Returns whether there is a chance that another major GC could 1176 // Returns whether there is a chance that another major GC could
1185 // collect more garbage. 1177 // collect more garbage.
1186 bool CollectGarbage(AllocationSpace space,
1187 GarbageCollector collector,
1188 const char* gc_reason,
1189 const char* collector_reason);
1190
1191 // Performs garbage collection operation.
1192 // Returns whether there is a chance that another major GC could
1193 // collect more garbage.
1194 inline bool CollectGarbage(AllocationSpace space, 1178 inline bool CollectGarbage(AllocationSpace space,
1195 const char* gc_reason = NULL); 1179 const char* gc_reason = NULL);
1196 1180
1197 static const int kNoGCFlags = 0; 1181 static const int kNoGCFlags = 0;
1198 static const int kSweepPreciselyMask = 1; 1182 static const int kSweepPreciselyMask = 1;
1199 static const int kReduceMemoryFootprintMask = 2; 1183 static const int kReduceMemoryFootprintMask = 2;
1200 static const int kAbortIncrementalMarkingMask = 4; 1184 static const int kAbortIncrementalMarkingMask = 4;
1201 1185
1202 // Making the heap iterable requires us to sweep precisely and abort any 1186 // Making the heap iterable requires us to sweep precisely and abort any
1203 // incremental marking as well. 1187 // incremental marking as well.
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1422 return true; 1406 return true;
1423 #else 1407 #else
1424 #ifdef VERIFY_HEAP 1408 #ifdef VERIFY_HEAP
1425 return FLAG_verify_heap; 1409 return FLAG_verify_heap;
1426 #else 1410 #else
1427 return false; 1411 return false;
1428 #endif 1412 #endif
1429 #endif 1413 #endif
1430 } 1414 }
1431 1415
1432 // Fill in bogus values in from space
1433 void ZapFromSpace();
1434
1435 // Print short heap statistics. 1416 // Print short heap statistics.
1436 void PrintShortHeapStatistics(); 1417 void PrintShortHeapStatistics();
1437 1418
1438 // Makes a new internalized string object 1419 // Makes a new internalized string object
1439 // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation 1420 // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
1440 // failed. 1421 // failed.
1441 // Please note this function does not perform a garbage collection. 1422 // Please note this function does not perform a garbage collection.
1442 MUST_USE_RESULT MaybeObject* CreateInternalizedString( 1423 MUST_USE_RESULT MaybeObject* CreateInternalizedString(
1443 const char* str, int length, int hash); 1424 const char* str, int length, int hash);
1444 MUST_USE_RESULT MaybeObject* CreateInternalizedString(String* str); 1425 MUST_USE_RESULT MaybeObject* CreateInternalizedString(String* str);
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1468 void TracePathToGlobal(); 1449 void TracePathToGlobal();
1469 #endif 1450 #endif
1470 1451
1471 // Callback function passed to Heap::Iterate etc. Copies an object if 1452 // Callback function passed to Heap::Iterate etc. Copies an object if
1472 // necessary, the object might be promoted to an old space. The caller must 1453 // necessary, the object might be promoted to an old space. The caller must
1473 // ensure the precondition that the object is (a) a heap object and (b) in 1454 // ensure the precondition that the object is (a) a heap object and (b) in
1474 // the heap's from space. 1455 // the heap's from space.
1475 static inline void ScavengePointer(HeapObject** p); 1456 static inline void ScavengePointer(HeapObject** p);
1476 static inline void ScavengeObject(HeapObject** p, HeapObject* object); 1457 static inline void ScavengeObject(HeapObject** p, HeapObject* object);
1477 1458
1478 // Commits from space if it is uncommitted.
1479 void EnsureFromSpaceIsCommitted();
1480
1481 // Support for partial snapshots. After calling this we have a linear 1459 // Support for partial snapshots. After calling this we have a linear
1482 // space to write objects in each space. 1460 // space to write objects in each space.
1483 void ReserveSpace(int *sizes, Address* addresses); 1461 void ReserveSpace(int *sizes, Address* addresses);
1484 1462
1485 // 1463 //
1486 // Support for the API. 1464 // Support for the API.
1487 // 1465 //
1488 1466
1489 bool CreateApiObjects(); 1467 bool CreateApiObjects();
1490 1468
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2079 // Support for computing object sizes during GC. 2057 // Support for computing object sizes during GC.
2080 HeapObjectCallback gc_safe_size_of_old_object_; 2058 HeapObjectCallback gc_safe_size_of_old_object_;
2081 static int GcSafeSizeOfOldObject(HeapObject* object); 2059 static int GcSafeSizeOfOldObject(HeapObject* object);
2082 2060
2083 // Update the GC state. Called from the mark-compact collector. 2061 // Update the GC state. Called from the mark-compact collector.
2084 void MarkMapPointersAsEncoded(bool encoded) { 2062 void MarkMapPointersAsEncoded(bool encoded) {
2085 ASSERT(!encoded); 2063 ASSERT(!encoded);
2086 gc_safe_size_of_old_object_ = &GcSafeSizeOfOldObject; 2064 gc_safe_size_of_old_object_ = &GcSafeSizeOfOldObject;
2087 } 2065 }
2088 2066
2067 // Code that should be run before and after each GC. Includes some
2068 // reporting/verification activities when compiled with DEBUG set.
2069 void GarbageCollectionPrologue();
2070 void GarbageCollectionEpilogue();
2071
2089 // Checks whether a global GC is necessary 2072 // Checks whether a global GC is necessary
2090 GarbageCollector SelectGarbageCollector(AllocationSpace space, 2073 GarbageCollector SelectGarbageCollector(AllocationSpace space,
2091 const char** reason); 2074 const char** reason);
2092 2075
2076 // Performs garbage collection operation.
2077 // Returns whether there is a chance that another major GC could
2078 // collect more garbage.
2079 bool CollectGarbage(AllocationSpace space,
2080 GarbageCollector collector,
2081 const char* gc_reason,
2082 const char* collector_reason);
2083
2093 // Performs garbage collection 2084 // Performs garbage collection
2094 // Returns whether there is a chance another major GC could 2085 // Returns whether there is a chance another major GC could
2095 // collect more garbage. 2086 // collect more garbage.
2096 bool PerformGarbageCollection(GarbageCollector collector, 2087 bool PerformGarbageCollection(GarbageCollector collector,
2097 GCTracer* tracer); 2088 GCTracer* tracer);
2098 2089
2099 inline void UpdateOldSpaceLimits(); 2090 inline void UpdateOldSpaceLimits();
2100 2091
2101 // Selects the proper allocation space depending on the given object 2092 // Selects the proper allocation space depending on the given object
2102 // size, pretenuring decision, and preferred old-space. 2093 // size, pretenuring decision, and preferred old-space.
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2162 // Allocate a tenured JS global property cell initialized with the hole. 2153 // Allocate a tenured JS global property cell initialized with the hole.
2163 MUST_USE_RESULT MaybeObject* AllocatePropertyCell(); 2154 MUST_USE_RESULT MaybeObject* AllocatePropertyCell();
2164 2155
2165 // Allocate Box. 2156 // Allocate Box.
2166 MUST_USE_RESULT MaybeObject* AllocateBox(Object* value, 2157 MUST_USE_RESULT MaybeObject* AllocateBox(Object* value,
2167 PretenureFlag pretenure); 2158 PretenureFlag pretenure);
2168 2159
2169 // Performs a minor collection in new generation. 2160 // Performs a minor collection in new generation.
2170 void Scavenge(); 2161 void Scavenge();
2171 2162
2163 // Commits from space if it is uncommitted.
2164 void EnsureFromSpaceIsCommitted();
2165
2166 // Uncommit unused semi space.
2167 bool UncommitFromSpace() { return new_space_.UncommitFromSpace(); }
2168
2169 // Fill in bogus values in from space
2170 void ZapFromSpace();
2171
2172 static String* UpdateNewSpaceReferenceInExternalStringTableEntry( 2172 static String* UpdateNewSpaceReferenceInExternalStringTableEntry(
2173 Heap* heap, 2173 Heap* heap,
2174 Object** pointer); 2174 Object** pointer);
2175 2175
2176 Address DoScavenge(ObjectVisitor* scavenge_visitor, Address new_space_front); 2176 Address DoScavenge(ObjectVisitor* scavenge_visitor, Address new_space_front);
2177 static void ScavengeStoreBufferCallback(Heap* heap, 2177 static void ScavengeStoreBufferCallback(Heap* heap,
2178 MemoryChunk* page, 2178 MemoryChunk* page,
2179 StoreBufferEvent event); 2179 StoreBufferEvent event);
2180 2180
2181 // Performs a major collection in the whole heap. 2181 // Performs a major collection in the whole heap.
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3090 DisallowHeapAllocation no_allocation; // i.e. no gc allowed. 3090 DisallowHeapAllocation no_allocation; // i.e. no gc allowed.
3091 3091
3092 private: 3092 private:
3093 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer); 3093 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
3094 }; 3094 };
3095 #endif // DEBUG 3095 #endif // DEBUG
3096 3096
3097 } } // namespace v8::internal 3097 } } // namespace v8::internal
3098 3098
3099 #endif // V8_HEAP_H_ 3099 #endif // V8_HEAP_H_
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