src/share/vm/utilities/accessFlags.hpp

rev 6875 : 8056240: Investigate increased GC remark time after class unloading changes in CRM Fuse
Reviewed-by: mgerdin, coleenp, bdelsart

@@ -168,10 +168,11 @@
   void set_queued_for_compilation()    { atomic_set_bits(JVM_ACC_QUEUED); }
   void clear_queued_for_compilation()  { atomic_clear_bits(JVM_ACC_QUEUED); }
 
   // Atomic update of flags
   void atomic_set_bits(jint bits);
+  bool atomic_set_one_bit(jint bit);
   void atomic_clear_bits(jint bits);
 
  private:
   friend class Method;
   friend class Klass;

@@ -228,16 +229,17 @@
   void set_field_has_generic_signature()
                                        {
                                          atomic_set_bits(JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE);
                                        }
 
-  void set_on_stack(const bool value)
+  bool set_on_stack(const bool value)
                                        {
                                          if (value) {
-                                           atomic_set_bits(JVM_ACC_ON_STACK);
+                                           return atomic_set_one_bit(JVM_ACC_ON_STACK);
                                          } else {
                                            atomic_clear_bits(JVM_ACC_ON_STACK);
+                                           return true; // Ignored
                                          }
                                        }
   // Conversion
   jshort as_short() const              { return (jshort)_flags; }
   jint   as_int() const                { return _flags; }