src/share/vm/classfile/symbolTable.cpp

*** 665,669 ****
--- 665,700 ----
      return dcmd->_dcmdparser.num_arguments();
    } else {
      return 0;
    }
  }
+ 
+ #ifndef PRODUCT
+ // Internal test of TempNewSymbol
+ void Test_TempNewSymbol() {
+   Thread* THREAD = Thread::current();
+   Symbol* sym = SymbolTable::new_symbol("abc", CATCH);
+   TempNewSymbol ss = sym;
+   assert(ss->refcount() == 1, "only one abc");
+   assert(ss->refcount() == sym->refcount(), "should match TempNewSymbol");
+ 
+   Symbol* sym1 = SymbolTable::new_symbol("efg", CATCH);
+   Symbol* sym2 = SymbolTable::new_symbol("hij", CATCH);
+   TempNewSymbol s1 = sym1;
+   TempNewSymbol s2 = sym2;
+   assert(s1->refcount() == 1, "one efg");
+   assert(s2->refcount() == 1, "one hij");
+ 
+   // Assignment operator
+   s1 = s2;
+   assert(sym2->refcount() == 2, "should be two hij");
+   assert(sym1->refcount() == 0, "should be no efg");
+ 
+   s1 = ss;  // s1 is abc
+   assert(s1->refcount() == 2, "should be two abc (s1 and ss)");
+   assert(sym2->refcount() == 1, "should only have one hij now (s2)");
+ 
+   TempNewSymbol s3;
+   s3 = SymbolTable::new_symbol("klm", CATCH);
+   assert(s3->refcount() == 1, "only one klm now");
+ }
+ #endif // PRODUCT