Track prologue offset of Code and use for more precise return addresses

runtime/vm/object.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 VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3965 matching lines @@
 
     friend class Code;
 
     DISALLOW_COPY_AND_ASSIGN(Comments);
   };
 
 
   const Comments& comments() const;
   void set_comments(const Comments& comments) const;
 
+  RawObject* return_address_metadata() const {
+    return raw_ptr()->return_address_metadata_;
+  }
+  // Sets |return_address_metadata|.
+  void SetPrologueOffset(intptr_t offset) const;
+  // Returns -1 if no prologue offset is available.
+  intptr_t GetPrologueOffset() const;
+
   enum InlinedIntervalEntries {
     kInlIntStart = 0,
     kInlIntInliningId = 1,
     kInlIntCallerId = 2,
     kInlIntNumEntries = 3,
   };
 
-  RawArray* inlined_intervals() const {
-    return raw_ptr()->inlined_intervals_;
-  }
-  void set_inlined_intervals(const Array& value) const;
+  RawArray* GetInlinedIntervals() const;
+  void SetInlinedIntervals(const Array& value) const;
 
-  RawArray* inlined_id_to_function() const {
-    return raw_ptr()->inlined_id_to_function_;
-  }
-  void set_inlined_id_to_function(const Array& value) const;
+  RawArray* GetInlinedIdToFunction() const;
+  void SetInlinedIdToFunction(const Array& value) const;
 
   void GetInlinedFunctionsAt(
       intptr_t offset, GrowableArray<Function*>* fs) const;
 
   void DumpInlinedIntervals() const;
 
   RawLocalVarDescriptors* var_descriptors() const {
     return raw_ptr()->var_descriptors_;
   }
   void set_var_descriptors(const LocalVarDescriptors& value) const {
@@ skipping 3733 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_