- Trigger old-gen GCs when needed.

vm/heap.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_HEAP_H_
 #define VM_HEAP_H_
 
 #include "vm/allocation.h"
 #include "vm/flags.h"
 #include "vm/globals.h"
+#include "vm/pages.h"
 
 namespace dart {
 
 // Forward declarations.
 class Isolate;
 class ObjectPointerVisitor;
 class PageSpace;
 class Scavenger;
 class VirtualMemory;
 
@@ skipping 12 matching lines @@
 
   // Default allocation sizes in MB for the old gen and code heaps.
   static const intptr_t kHeapSizeInMB = 512;
   static const intptr_t kCodeHeapSizeInMB = 4;
 
   ~Heap();
 
   uword Allocate(intptr_t size, Space space) {
     switch (space) {
       case kNew:
+        // Do not attempt to allocate very large objects in new space.
+        if (!PageSpace::IsPageAllocatableSize(size)) {
+          return AllocateOld(size);
+        }
         return AllocateNew(size);
       case kOld:
         return AllocateOld(size);
       case kExecutable:
         return AllocateCode(size);
       default:
         UNREACHABLE();
     }
     return 0;
   }
@@ skipping 50 matching lines @@
  public:
   NoGCScope() {}
  private:
   DISALLOW_COPY_AND_ASSIGN(NoGCScope);
 };
 #endif  // defined(DEBUG)
 
 }  // namespace dart
 
 #endif  // VM_HEAP_H_