- Wire the stack frame iterator to use stack maps for traversing objects if there are stack maps in…

vm/object.h

Index: vm/object.h
===================================================================
--- vm/object.h	(revision 5921)
+++ vm/object.h	(working copy)
@@ -2019,10 +2019,10 @@
   void SetCode(const Code& code) const;
 
   // Return the offset of the highest stack slot that has an object.
-  intptr_t Maximum() const;
+  intptr_t MaximumBitOffset() const { return raw_ptr()->max_set_bit_offset_; }
 
   // Return the offset of the lowest stack slot that has an object.
-  intptr_t Minimum() const;
+  intptr_t MinimumBitOffset() const { return raw_ptr()->min_set_bit_offset_; }
 
   static intptr_t InstanceSize() {
     ASSERT(sizeof(RawStackmap) == OFFSET_OF(RawStackmap, data_));
@@ -2031,19 +2031,24 @@
   static intptr_t InstanceSize(intptr_t size) {
     return RoundedAllocationSize(sizeof(RawStackmap) + (size * kWordSize));
   }
-  static RawStackmap* New(uword pc, const Code& code, BitmapBuilder* bmap);
+  static RawStackmap* New(uword pc, BitmapBuilder* bmap);
 
  private:
   inline intptr_t SizeInBits() const;
 
+  void SetMinBitOffset(intptr_t value) const {
+    raw_ptr()->min_set_bit_offset_ = value;
+  }
+  void SetMaxBitOffset(intptr_t value) const {
+    raw_ptr()->max_set_bit_offset_ = value;
+  }
+
   bool InRange(intptr_t offset) const { return offset < SizeInBits(); }
 
   bool GetBit(intptr_t bit_offset) const;
   void SetBit(intptr_t bit_offset, bool value) const;
 
   void set_bitmap_size_in_bytes(intptr_t value) const;
-  void set_pc(uword value) const;
-  void set_code(const Code& code) const;
 
   HEAP_OBJECT_IMPLEMENTATION(Stackmap, Object);
   friend class Class;