[heap, debugger] Introduce out-of-memory listener for debugger.

src/heap/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
 // Clients of this interface shouldn't depend on lots of heap internals.
 // Do not include anything from src/heap here!
 #include "include/v8.h"
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/base/atomic-utils.h"
+#include "src/debug/debug-interface.h"
 #include "src/globals.h"
 #include "src/heap-symbols.h"
 #include "src/list.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 using v8::MemoryPressureLevel;
 
@@ skipping 812 matching lines @@
   void CreateApiObjects();
 
   // Implements the corresponding V8 API function.
   bool IdleNotification(double deadline_in_seconds);
   bool IdleNotification(int idle_time_in_ms);
 
   void MemoryPressureNotification(MemoryPressureLevel level,
                                   bool is_isolate_locked);
   void CheckMemoryPressure();
 
+  void SetOutOfMemoryCallback(v8::debug::OutOfMemoryCallback callback,
+                              void* data);
+
   double MonotonicallyIncreasingTimeInMs();
 
   void RecordStats(HeapStats* stats, bool take_snapshot = false);
 
   // Check new space expansion criteria and expand semispaces if it was hit.
   void CheckNewSpaceExpansionCriteria();
 
   void VisitExternalResources(v8::ExternalResourceVisitor* visitor);
 
   // An object should be promoted if the object has survived a
@@ skipping 893 matching lines @@
   inline void UpdateAllocationsHash(uint32_t value);
   void PrintAlloctionsHash();
 
   void AddToRingBuffer(const char* string);
   void GetFromRingBuffer(char* buffer);
 
   void CompactRetainedMaps(ArrayList* retained_maps);
 
   void CollectGarbageOnMemoryPressure();
 
+  void InvokeOutOfMemoryCallback();
+
   // Attempt to over-approximate the weak closure by marking object groups and
   // implicit references from global handles, but don't atomically complete
   // marking. If we continue to mark incrementally, we might have marked
   // objects that die later.
   void FinalizeIncrementalMarking(GarbageCollectionReason gc_reason);
 
   // Returns the timer used for a given GC type.
   // - GCScavenger: young generation GC
   // - GCCompactor: full GC
   // - GCFinalzeMC: finalization of incremental full GC
@@ skipping 390 matching lines @@
   size_t survived_last_scavenge_;
 
   // This is not the depth of nested AlwaysAllocateScope's but rather a single
   // count, as scopes can be acquired from multiple tasks (read: threads).
   base::AtomicNumber<size_t> always_allocate_scope_count_;
 
   // Stores the memory pressure level that set by MemoryPressureNotification
   // and reset by a mark-compact garbage collection.
   base::AtomicValue<MemoryPressureLevel> memory_pressure_level_;
 
+  v8::debug::OutOfMemoryCallback out_of_memory_callback_;
+  void* out_of_memory_callback_data_;
+
   // For keeping track of context disposals.
   int contexts_disposed_;
 
   // The length of the retained_maps array at the time of context disposal.
   // This separates maps in the retained_maps array that were created before
   // and after context disposal.
   int number_of_disposed_maps_;
 
   int global_ic_age_;
 
@@ skipping 496 matching lines @@
   friend class LargeObjectSpace;
   friend class NewSpace;
   friend class PagedSpace;
   DISALLOW_COPY_AND_ASSIGN(AllocationObserver);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_