[Fuchsia] Give VMOs names

runtime/vm/heap.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_HEAP_H_
 #define RUNTIME_VM_HEAP_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/flags.h"
@@ skipping 120 matching lines @@
   // Accessors for inlined allocation in generated code.
   static intptr_t TopOffset(Space space);
   static intptr_t EndOffset(Space space);
 
   // Initialize the heap and register it with the isolate.
   static void Init(Isolate* isolate,
                    intptr_t max_new_gen_words,
                    intptr_t max_old_gen_words,
                    intptr_t max_external_words);
 
+  // Writes a suitable name for a VM region in the heap into the buffer `name`.
+  static void RegionName(Heap* heap,
+                         Space space,
+                         char* name,
+                         intptr_t name_size);
+
   // Verify that all pointers in the heap point to the heap.
   bool Verify(MarkExpectation mark_expectation = kForbidMarked) const;
 
   // Print heap sizes.
   void PrintSizes() const;
 
   // Return amount of memory used and capacity in a space, excluding external.
   int64_t UsedInWords(Space space) const;
   int64_t CapacityInWords(Space space) const;
   int64_t ExternalInWords(Space space) const;
@@ skipping 236 matching lines @@
 // Note: During this scope, the code pages are non-executable.
 class WritableVMIsolateScope : StackResource {
  public:
   explicit WritableVMIsolateScope(Thread* thread);
   ~WritableVMIsolateScope();
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_HEAP_H_