Refactor snapshots pieces to include a section for loading instructions into the heap of a regular …

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 74 matching lines @@
 
   // Heap contains the specified address.
   bool Contains(uword addr) const;
   bool NewContains(uword addr) const;
   bool OldContains(uword addr) const;
   bool CodeContains(uword addr) const;
   bool DataContains(uword addr) const;
 
   void IterateObjects(ObjectVisitor* visitor) const;
   void IterateOldObjects(ObjectVisitor* visitor) const;
-  void IterateOldObjectsNoEmbedderPages(ObjectVisitor* visitor) const;
+  void IterateOldObjectsNoExternalPages(ObjectVisitor* visitor) const;
   void IterateObjectPointers(ObjectVisitor* visitor) const;
 
   // Find an object by visiting all pointers in the specified heap space,
   // the 'visitor' is used to determine if an object is found or not.
   // The 'visitor' function should be set up to return true if the
   // object is found, traversal through the heap space stops at that
   // point.
   // The 'visitor' function should return false if the object is not found,
   // traversal through the heap space continues.
   // Returns null object if nothing is found.
@@ skipping 183 matching lines @@
   uword AllocateNew(intptr_t size);
   uword AllocateOld(intptr_t size, HeapPage::PageType type);
 
   // Visit all pointers. Caller must ensure concurrent sweeper is not running,
   // and the visitor must not allocate.
   void VisitObjectPointers(ObjectPointerVisitor* visitor) const;
 
   // Visit all objects, including FreeListElement "objects". Caller must ensure
   // concurrent sweeper is not running, and the visitor must not allocate.
   void VisitObjects(ObjectVisitor* visitor) const;
+  void VisitObjectsNoExternalPages(ObjectVisitor* visitor) const;
+  void VisitObjectsExternalPages(ObjectVisitor* visitor) const;
 
   // Like Verify, but does not wait for concurrent sweeper, so caller must
   // ensure thread-safety.
   bool VerifyGC(MarkExpectation mark_expectation = kForbidMarked) const;
 
   // Helper functions for garbage collection.
   void CollectNewSpaceGarbage(Thread* thread,
                               ApiCallbacks api_callbacks,
                               GCReason reason);
   void CollectOldSpaceGarbage(Thread* thread,
@@ skipping 78 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_