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Side by Side Diff: src/heap/objects-visiting.h

Issue 1478943003: Use WeakCells in the optimized code map rather than traversing in pause. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Patch One. Created 5 years 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 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_OBJECTS_VISITING_H_ 5 #ifndef V8_OBJECTS_VISITING_H_
6 #define V8_OBJECTS_VISITING_H_ 6 #define V8_OBJECTS_VISITING_H_
7 7
8 #include "src/allocation.h" 8 #include "src/allocation.h"
9 #include "src/heap/heap.h" 9 #include "src/heap/heap.h"
10 #include "src/heap/spaces.h" 10 #include "src/heap/spaces.h"
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376 INLINE(static void VisitJSTypedArray(Map* map, HeapObject* object)); 376 INLINE(static void VisitJSTypedArray(Map* map, HeapObject* object));
377 INLINE(static void VisitJSDataView(Map* map, HeapObject* object)); 377 INLINE(static void VisitJSDataView(Map* map, HeapObject* object));
378 INLINE(static void VisitNativeContext(Map* map, HeapObject* object)); 378 INLINE(static void VisitNativeContext(Map* map, HeapObject* object));
379 INLINE(static void VisitBytecodeArray(Map* map, HeapObject* object)); 379 INLINE(static void VisitBytecodeArray(Map* map, HeapObject* object));
380 380
381 // Mark pointers in a Map and its TransitionArray together, possibly 381 // Mark pointers in a Map and its TransitionArray together, possibly
382 // treating transitions or back pointers weak. 382 // treating transitions or back pointers weak.
383 static void MarkMapContents(Heap* heap, Map* map); 383 static void MarkMapContents(Heap* heap, Map* map);
384 static void MarkTransitionArray(Heap* heap, TransitionArray* transitions); 384 static void MarkTransitionArray(Heap* heap, TransitionArray* transitions);
385 385
386 // Mark pointers in the optimized code map that should act as strong
387 // references, possibly treating some entries weak.
388 static void MarkOptimizedCodeMap(Heap* heap, FixedArray* code_map);
389
390 // Mark non-optimized code for functions inlined into the given optimized 386 // Mark non-optimized code for functions inlined into the given optimized
391 // code. This will prevent it from being flushed. 387 // code. This will prevent it from being flushed.
392 static void MarkInlinedFunctionsCode(Heap* heap, Code* code); 388 static void MarkInlinedFunctionsCode(Heap* heap, Code* code);
393 389
394 // Code flushing support. 390 // Code flushing support.
395 INLINE(static bool IsFlushable(Heap* heap, JSFunction* function)); 391 INLINE(static bool IsFlushable(Heap* heap, JSFunction* function));
396 INLINE(static bool IsFlushable(Heap* heap, SharedFunctionInfo* shared_info)); 392 INLINE(static bool IsFlushable(Heap* heap, SharedFunctionInfo* shared_info));
397 393
398 // Helpers used by code flushing support that visit pointer fields and treat 394 // Helpers used by code flushing support that visit pointer fields and treat
399 // references to code objects either strongly or weakly. 395 // references to code objects either strongly or weakly.
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437 // the next element. Given the head of the list, this function removes dead 433 // the next element. Given the head of the list, this function removes dead
438 // elements from the list and if requested records slots for next-element 434 // elements from the list and if requested records slots for next-element
439 // pointers. The template parameter T is a WeakListVisitor that defines how to 435 // pointers. The template parameter T is a WeakListVisitor that defines how to
440 // access the next-element pointers. 436 // access the next-element pointers.
441 template <class T> 437 template <class T>
442 Object* VisitWeakList(Heap* heap, Object* list, WeakObjectRetainer* retainer); 438 Object* VisitWeakList(Heap* heap, Object* list, WeakObjectRetainer* retainer);
443 } // namespace internal 439 } // namespace internal
444 } // namespace v8 440 } // namespace v8
445 441
446 #endif // V8_OBJECTS_VISITING_H_ 442 #endif // V8_OBJECTS_VISITING_H_
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