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