1 /* 2 * Copyright (c) 2009, 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 /** 26 * @test 27 * @bug 6885584 28 * @summary A particular class structure causes large allocation spike for jit 29 * 30 * @run main/othervm -Xbatch compiler.c2.Test6885584 31 */ 32 33 package compiler.c2; 34 35 public class Test6885584 { 36 static private int i1; 37 static private int i2; 38 static private int i3; 39 40 static int limit = Integer.MAX_VALUE - 8; 41 42 public static void main(String args[]) { 43 // Run long enough to trigger an OSR 44 for(int j = 200000; j != 0; j--) { 45 } 46 47 // This must reference a field 48 i1 = i2; 49 50 // The resource leak is roughly proportional to this initial value 51 for(int k = Integer.MAX_VALUE - 1; k != 0; k--) { 52 // Make sure the body does some work 53 if(i2 > i3)i1 = k; 54 if (k <= limit) break; 55 } 56 } 57 58 }