src/share/vm/oops/methodOop.hpp

rev 1083 : code cache unloading for webrev 091214

@@ -124,10 +124,11 @@
   // "_code->entry_point()".  Because of tiered compilation and de-opt, this
   // field can come and go.  It can transition from NULL to not-null at any
   // time (whenever a compile completes).  It can transition from not-null to
   // NULL only at safepoints (because of a de-opt).
   nmethod* volatile _code;                       // Points to the corresponding piece of native code
+  nmethod* volatile _saved_code;                 // remember nmethod while we attempt to clear code cache space
   volatile address           _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
 
  public:
 
   static const bool IsUnsafeConc         = false;

@@ -300,11 +301,14 @@
 
   // nmethod/verified compiler entry
   address verified_code_entry();
   bool check_code() const;      // Not inline to avoid circular ref
   nmethod* volatile code() const                 { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
+  nmethod* saved_code() const                    { return _saved_code; }
+  void set_saved_code(nmethod* code)             { _saved_code = code; }
   void clear_code();            // Clear out any compiled code
+  void clear_code_hedge();      // Clear out any compiled code and save code ptr in attempt to clean up code cache
   void set_code(methodHandle mh, nmethod* code);
   void set_adapter_entry(AdapterHandlerEntry* adapter) {  _adapter = adapter; }
   address get_i2c_entry();
   address get_c2i_entry();
   address get_c2i_unverified_entry();