1 /* 2 * Copyright (c) 2008, 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 /* 25 * @test 26 * @bug 6724218 27 * @summary Fix raise_LCA_above_marks() early termination 28 * @run main/othervm -Xbatch -XX:CompileCommand=exclude,Test.update Test 29 */ 30 31 public class Test { 32 Test next = null; 33 Object value = null; 34 35 static boolean _closed = false; 36 static int size = 0; 37 static Test list = null; 38 static int cache_size = 0; 39 static Test cache = null; 40 41 Object get(int i) { 42 Test t = list; 43 list = t.next; 44 size -= 1; 45 Object o = t.value; 46 if (i > 0) { 47 t.next = cache; 48 t.value = null; 49 cache = t; 50 cache_size = +1; 51 } 52 return o; 53 } 54 55 void update() { 56 // Exclude compilation of this one. 57 if (size == 0) { 58 Test t; 59 if (cache_size > 0) { 60 t = cache; 61 cache = t.next; 62 cache_size = -1; 63 } else { 64 t = new Test(); 65 } 66 t.value = new Object(); 67 t.next = list; 68 list = t; 69 size += 1; 70 } 71 } 72 73 synchronized Object test(int i) { 74 while (true) { 75 if (_closed) { 76 return null; 77 } else if (size > 0) { 78 return get(i); 79 } 80 update(); 81 } 82 } 83 84 public static void main(String argv[]) throws Exception { 85 Test t = new Test(); 86 int lim = 500000; 87 Object o; 88 for (int j = 0; j < lim; j++) { 89 o = t.test(j&1); 90 if (o == null) { 91 throw new Exception("*** Failed on iteration " + j); 92 } 93 if ((j&1) == 0) { 94 t.update(); 95 } 96 } 97 } 98 }