Adding support for reporting addresses of JIT compiled code to OProfile

src/objects.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2240 matching lines @@
   void CopyFrom(const CodeDesc& desc);
 
   // Returns the object size for a given body and sinfo size (Used for
   // allocation).
   static int SizeFor(int body_size, int sinfo_size) {
     ASSERT_SIZE_TAG_ALIGNED(body_size);
     ASSERT_SIZE_TAG_ALIGNED(sinfo_size);
     return RoundUp(kHeaderSize + body_size + sinfo_size, kCodeAlignment);
   }
 
+  // Calculate the size of the code object to report for log events. This takes
+  // the layout of the code object into account.
+  int ExecutableSize() {
+    // Check that the assumptions about the layout of the code object holds.
+    ASSERT_EQ(reinterpret_cast<unsigned int>(instruction_start()) -
+              reinterpret_cast<unsigned int>(address()),
+              Code::kHeaderSize);
+    return instruction_size() + Code::kHeaderSize;
+  }
+
   // Locating source position.
   int SourcePosition(Address pc);
   int SourceStatementPosition(Address pc);
 
   // Casting.
   static inline Code* cast(Object* obj);
 
   // Dispatched behavior.
   int CodeSize() { return SizeFor(body_size(), sinfo_size()); }
   void CodeIterateBody(ObjectVisitor* v);
@@ skipping 2008 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_