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 * 29 * @run main/othervm -Xbatch 30 * -XX:CompileCommand=exclude,compiler.c2.Test6724218::update 31 * compiler.c2.Test6724218 32 */ 33 34 package compiler.c2; 35 36 public class Test6724218 { 37 Test6724218 next = null; 38 Object value = null; 39 40 static boolean _closed = false; 41 static int size = 0; 42 static Test6724218 list = null; 43 static int cache_size = 0; 44 static Test6724218 cache = null; 45 46 Object get(int i) { 47 Test6724218 t = list; 48 list = t.next; 49 size -= 1; 50 Object o = t.value; 51 if (i > 0) { 52 t.next = cache; 53 t.value = null; 54 cache = t; 55 cache_size = +1; 56 } 57 return o; 58 } 59 60 void update() { 61 // Exclude compilation of this one. 62 if (size == 0) { 63 Test6724218 t; 64 if (cache_size > 0) { 65 t = cache; 66 cache = t.next; 67 cache_size = -1; 68 } else { 69 t = new Test6724218(); 70 } 71 t.value = new Object(); 72 t.next = list; 73 list = t; 74 size += 1; 75 } 76 } 77 78 synchronized Object test(int i) { 79 while (true) { 80 if (_closed) { 81 return null; 82 } else if (size > 0) { 83 return get(i); 84 } 85 update(); 86 } 87 } 88 89 public static void main(String argv[]) throws Exception { 90 Test6724218 t = new Test6724218(); 91 int lim = 500000; 92 Object o; 93 for (int j = 0; j < lim; j++) { 94 o = t.test(j&1); 95 if (o == null) { 96 throw new Exception("*** Failed on iteration " + j); 97 } 98 if ((j&1) == 0) { 99 t.update(); 100 } 101 } 102 } 103 }