Notify collector about lazily deoptimized code objects.

src/mark-compact.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 306 matching lines @@
     RELOCATED_CODE_OBJECT,
     CODE_TARGET_SLOT,
     CODE_ENTRY_SLOT,
     DEBUG_TARGET_SLOT,
     JS_RETURN_SLOT,
     NUMBER_OF_SLOT_TYPES
   };
 
   void UpdateSlots(Heap* heap);
 
+  void UpdateSlotsWithFilter(Heap* heap);
+
   SlotsBuffer* next() { return next_; }
 
   static int SizeOfChain(SlotsBuffer* buffer) {
     if (buffer == NULL) return 0;
     return static_cast<int>(buffer->idx_ +
                             (buffer->chain_length_ - 1) * kNumberOfElements);
   }
 
   inline bool IsFull() {
     return idx_ == kNumberOfElements;
   }
 
   inline bool HasSpaceForTypedSlot() {
     return idx_ < kNumberOfElements - 1;
   }
 
-  static void UpdateSlotsRecordedIn(Heap* heap, SlotsBuffer* buffer) {
+  static void UpdateSlotsRecordedIn(Heap* heap,
+                                    SlotsBuffer* buffer,
+                                    bool code_slots_filtering_required) {
     while (buffer != NULL) {
-      buffer->UpdateSlots(heap);
+      if (code_slots_filtering_required) {
+        buffer->UpdateSlotsWithFilter(heap);
+      } else {
+        buffer->UpdateSlots(heap);
+      }
       buffer = buffer->next();
     }
   }
 
   enum AdditionMode {
     FAIL_ON_OVERFLOW,
     IGNORE_OVERFLOW
   };
 
   static bool ChainLengthThresholdReached(SlotsBuffer* buffer) {
@@ skipping 183 matching lines @@
                      int size,
                      AllocationSpace to_old_space);
 
   bool TryPromoteObject(HeapObject* object, int object_size);
 
   inline Object* encountered_weak_maps() { return encountered_weak_maps_; }
   inline void set_encountered_weak_maps(Object* weak_map) {
     encountered_weak_maps_ = weak_map;
   }
 
+  void InvalidateCode(Code* code);
+
  private:
   MarkCompactCollector();
   ~MarkCompactCollector();
 
+  bool MarkInvalidatedCode();
+  void RemoveDeadInvalidatedCode();
+  void ProcessInvalidatedCode(ObjectVisitor* visitor);
+
+
 #ifdef DEBUG
   enum CollectorState {
     IDLE,
     PREPARE_GC,
     MARK_LIVE_OBJECTS,
     SWEEP_SPACES,
     ENCODE_FORWARDING_ADDRESSES,
     UPDATE_POINTERS,
     RELOCATE_OBJECTS
   };
 
   // The current stage of the collector.
   CollectorState state_;
 #endif
 
   // Global flag that forces sweeping to be precise, so we can traverse the
   // heap.
   bool sweep_precisely_;
 
   // True if we are collecting slots to perform evacuation from evacuation
   // candidates.
   bool compacting_;
 
+  bool was_marked_incrementally_;
+
   bool collect_maps_;
 
   // A pointer to the current stack-allocated GC tracer object during a full
   // collection (NULL before and after).
   GCTracer* tracer_;
 
   SlotsBufferAllocator slots_buffer_allocator_;
 
   SlotsBuffer* migration_slots_buffer_;
 
@@ skipping 169 matching lines @@
   friend class UnmarkObjectVisitor;
   static void UnmarkObject(HeapObject* obj);
 #endif
 
   Heap* heap_;
   MarkingDeque marking_deque_;
   CodeFlusher* code_flusher_;
   Object* encountered_weak_maps_;
 
   List<Page*> evacuation_candidates_;
+  List<Code*> invalidated_code_;
 
   friend class Heap;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_