1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "runtime/interfaceSupport.inline.hpp" 26 #include "classfile/symbolTable.hpp" 27 #include "unittest.hpp" 28 29 TEST_VM(SymbolTable, temp_new_symbol) { 30 // Assert messages assume these symbols are unique, and the refcounts start at 31 // one, but code does not rely on this. 32 JavaThread* THREAD = JavaThread::current(); 33 // the thread should be in vm to use locks 34 ThreadInVMfromNative ThreadInVMfromNative(THREAD); 35 36 Symbol* abc = SymbolTable::new_symbol("abc", CATCH); 37 int abccount = abc->refcount(); 38 TempNewSymbol ss = abc; 39 ASSERT_EQ(ss->refcount(), abccount) << "only one abc"; 40 ASSERT_EQ(ss->refcount(), abc->refcount()) << "should match TempNewSymbol"; 41 42 Symbol* efg = SymbolTable::new_symbol("efg", CATCH); 43 Symbol* hij = SymbolTable::new_symbol("hij", CATCH); 44 int efgcount = efg->refcount(); 45 int hijcount = hij->refcount(); 46 47 TempNewSymbol s1 = efg; 48 TempNewSymbol s2 = hij; 49 ASSERT_EQ(s1->refcount(), efgcount) << "one efg"; 50 ASSERT_EQ(s2->refcount(), hijcount) << "one hij"; 51 52 // Assignment operator 53 s1 = s2; 54 ASSERT_EQ(hij->refcount(), hijcount + 1) << "should be two hij"; 55 ASSERT_EQ(efg->refcount(), efgcount - 1) << "should be no efg"; 56 57 s1 = ss; // s1 is abc 58 ASSERT_EQ(s1->refcount(), abccount + 1) << "should be two abc (s1 and ss)"; 59 ASSERT_EQ(hij->refcount(), hijcount) << "should only have one hij now (s2)"; 60 61 s1 = s1; // self assignment 62 ASSERT_EQ(s1->refcount(), abccount + 1) << "should still be two abc (s1 and ss)"; 63 64 TempNewSymbol s3; 65 Symbol* klm = SymbolTable::new_symbol("klm", CATCH); 66 int klmcount = klm->refcount(); 67 s3 = klm; // assignment 68 ASSERT_EQ(s3->refcount(), klmcount) << "only one klm now"; 69 70 Symbol* xyz = SymbolTable::new_symbol("xyz", CATCH); 71 int xyzcount = xyz->refcount(); 72 { // inner scope 73 TempNewSymbol s_inner = xyz; 74 } 75 ASSERT_EQ(xyz->refcount(), xyzcount - 1) 76 << "Should have been decremented by dtor in inner scope"; 77 }