1 /* 2 * Copyright (c) 2008, 2018, 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 * 27 * @summary converted from VM Testbase jit/deoptimization/test02. 28 * VM Testbase keywords: [jit, quick] 29 * 30 * @library /vmTestbase 31 * /test/lib 32 * @run driver jdk.test.lib.FileInstaller . . 33 * @build jit.deoptimization.test02.test02 34 * @run driver ExecDriver --java jit.deoptimization.test02.test02 35 */ 36 37 package jit.deoptimization.test02; 38 39 import nsk.share.TestFailure; 40 41 /* 42 * Simple loop causes the optimizer to deoptimize 43 * foo methos when an instance of class B is created. 44 * 45 * run with the -XX:TraceDeoptimization to observ the result. 46 */ 47 48 class test02 { 49 public static void main (String[] args) { 50 A obj = new A(); 51 for (int index = 0; index < 100; index++) { 52 obj.used_alot(); 53 } 54 } 55 } 56 57 class A { 58 protected final int counter = 25000; 59 protected int count = 0; 60 public void foo(int index) { 61 count++; 62 63 if (index == counter - 1) { 64 try { 65 ((B)Class.forName("B").newInstance()).foo(index); 66 } 67 catch(Exception e) { 68 } 69 } 70 } 71 72 public synchronized void used_alot() { 73 for (int index = 0; index < counter; index++) { 74 foo(index); 75 } 76 } 77 } 78 79 class B extends A { 80 public void foo(int index) { 81 count--; 82 } 83 };