Break deserializer reservations into chunks that fit onto a page.

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 "src/allocation.h"
@@ skipping 991 matching lines @@
   inline AllocationMemento* FindAllocationMemento(HeapObject* object);
 
   // An object may have an AllocationSite associated with it through a trailing
   // AllocationMemento. Its feedback should be updated when objects are found
   // in the heap.
   static inline void UpdateAllocationSiteFeedback(HeapObject* object,
                                                   ScratchpadSlotMode mode);
 
   // Support for partial snapshots.  After calling this we have a linear
   // space to write objects in each space.
-  void ReserveSpace(int* sizes, Address* addresses);
+  struct Chunk {
+    uint32_t size;
+    Address start;
+    Address end;
+  };
+
+  typedef List<Chunk> Reservation;
+
+  // Returns false if not able to reserve.
+  bool ReserveSpace(Reservation* reservations);
 
   //
   // Support for the API.
   //
 
   void CreateApiObjects();
 
   inline intptr_t PromotedTotalSize() {
     int64_t total = PromotedSpaceSizeOfObjects() + PromotedExternalMemorySize();
     if (total > kMaxInt) return static_cast<intptr_t>(kMaxInt);
@@ skipping 1508 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_H_