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 }