1 /* 2 * Copyright (c) 2013, 2015, 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 DeoptimizeMultipleOSRTest 27 * @bug 8061817 28 * @summary testing of WB::deoptimizeMethod() 29 * @library /test/lib / 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @build sun.hotspot.WhiteBox 33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 34 * sun.hotspot.WhiteBox$WhiteBoxPermission 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI 36 * -XX:CompileCommand=compileonly,compiler.whitebox.DeoptimizeMultipleOSRTest::triggerOSR 37 * compiler.whitebox.DeoptimizeMultipleOSRTest 38 */ 39 40 package compiler.whitebox; 41 42 import sun.hotspot.WhiteBox; 43 44 import java.lang.reflect.Method; 45 46 public class DeoptimizeMultipleOSRTest { 47 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 48 private static final long BACKEDGE_THRESHOLD = 150000; 49 private Method method; 50 private int counter = 0; 51 52 public static void main(String[] args) throws Exception { 53 DeoptimizeMultipleOSRTest test = new DeoptimizeMultipleOSRTest(); 54 test.test(); 55 } 56 57 /** 58 * Triggers two different OSR compilations for the same method and 59 * checks if WhiteBox.deoptimizeMethod() deoptimizes both. 60 * 61 * @throws Exception 62 */ 63 public void test() throws Exception { 64 method = DeoptimizeMultipleOSRTest.class.getDeclaredMethod("triggerOSR", boolean.class, long.class); 65 // Trigger two OSR compiled versions 66 triggerOSR(true, BACKEDGE_THRESHOLD); 67 triggerOSR(false, BACKEDGE_THRESHOLD); 68 // Wait for compilation 69 CompilerWhiteBoxTest.waitBackgroundCompilation(method); 70 // Deoptimize 71 WHITE_BOX.deoptimizeMethod(method, true); 72 if (WHITE_BOX.isMethodCompiled(method, true)) { 73 throw new AssertionError("Not all OSR compiled versions were deoptimized"); 74 } 75 } 76 77 /** 78 * Triggers OSR compilations by executing loops. 79 * 80 * @param first Determines which loop to execute 81 * @param limit The number of loop iterations 82 */ 83 public void triggerOSR(boolean first, long limit) { 84 if (limit != 1) { 85 // Warmup method to avoid uncommon traps 86 for (int i = 0; i < limit; ++i) { 87 triggerOSR(first, 1); 88 } 89 CompilerWhiteBoxTest.waitBackgroundCompilation(method); 90 } 91 if (first) { 92 // Trigger OSR compilation 1 93 for (int i = 0; i < limit; ++i) { 94 counter++; 95 } 96 } else { 97 // Trigger OSR compilation 2 98 for (int i = 0; i < limit; ++i) { 99 counter++; 100 } 101 } 102 } 103 }