1 /* 2 * Copyright (c) 2016 SAP SE. 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 8159620 27 * @summary testing that -XX:-UseOnStackReplacement works with both -XX:(+/-)TieredCompilation 28 * @modules java.base/jdk.internal.misc 29 * @library /testlibrary /test/lib / 30 * @build sun.hotspot.WhiteBox 31 * @run main ClassFileInstaller sun.hotspot.WhiteBox 32 * sun.hotspot.WhiteBox$WhiteBoxPermission 33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+PrintCompilation 34 * -XX:-BackgroundCompilation -XX:-TieredCompilation -XX:-UseOnStackReplacement DisableOSRTest 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+PrintCompilation 36 * -XX:-BackgroundCompilation -XX:+TieredCompilation -XX:-UseOnStackReplacement DisableOSRTest 37 */ 38 39 import java.lang.reflect.Method; 40 import java.util.Random; 41 import sun.hotspot.WhiteBox; 42 43 public class DisableOSRTest { 44 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 45 private static final Random RANDOM = new Random(); 46 47 public static int foo() { 48 return RANDOM.nextInt(); 49 } 50 51 public static void main(String[] args) throws Exception { 52 Method m = DisableOSRTest.class.getMethod("main", String[].class); 53 54 for (int i = 0; i < 100_000; i++) { 55 foo(); 56 } 57 58 if (WB.isMethodCompiled(m, true /* isOsr */)) { 59 throw new RuntimeException("\"" + m + "\" shouldn't be OSR compiled if running with -XX:-UseOnStackReplacement!"); 60 } 61 } 62 }