[Fuchsia] Give VMOs names

runtime/vm/scavenger.h

 // Copyright (c) 2012, 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 RUNTIME_VM_SCAVENGER_H_
 #define RUNTIME_VM_SCAVENGER_H_
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/dart.h"
@@ skipping 14 matching lines @@
 class ObjectSet;
 class ScavengerVisitor;
 
 // Wrapper around VirtualMemory that adds caching and handles the empty case.
 class SemiSpace {
  public:
   static void InitOnce();
 
   // Get a space of the given size. Returns NULL on out of memory. If size is 0,
   // returns an empty space: pointer(), start() and end() all return NULL.
-  static SemiSpace* New(intptr_t size_in_words);
+  // The name parameter may be NULL. If non-NULL it is ued to give the OS a name
+  // for the underlying virtual memory region.
+  static SemiSpace* New(intptr_t size_in_words, const char* name);
 
   // Hand back an unused space.
   void Delete();
 
   void* pointer() const { return region_.pointer(); }
   uword start() const { return region_.start(); }
   uword end() const { return region_.end(); }
   intptr_t size_in_words() const {
     return static_cast<intptr_t>(region_.size()) >> kWordSizeLog2;
   }
@@ skipping 251 matching lines @@
 
   friend class ScavengerVisitor;
   friend class ScavengerWeakVisitor;
 
   DISALLOW_COPY_AND_ASSIGN(Scavenger);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_SCAVENGER_H_