1 /*

     2  * Copyright (c) 2013, 2014, 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 /testlibrary/whitebox

    32  * @build DeoptimizeMultipleOSRTest

    33  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    34  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

    35  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,DeoptimizeMultipleOSRTest::triggerOSR DeoptimizeMultipleOSRTest

    36  * @summary testing of WB::deoptimizeMethod()

    37  */

    38 public class DeoptimizeMultipleOSRTest {

    39     private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();

    40     private static final long BACKEDGE_THRESHOLD = 150000;

    41     private Method method;

    42     private int counter = 0;

    43 

    44     public static void main(String[] args) throws Exception {

    45         DeoptimizeMultipleOSRTest test = new DeoptimizeMultipleOSRTest();

    46         test.test();

    47     }

    48 

    49     /**

    50      * Triggers two different OSR compilations for the same method and

    51      * checks if WhiteBox.deoptimizeMethod() deoptimizes both.

    52      *

    53      * @throws Exception

    54      */

    55     public void test() throws Exception {

    56         method = DeoptimizeMultipleOSRTest.class.getDeclaredMethod("triggerOSR", boolean.class, long.class);

    57         // Trigger two OSR compiled versions

    58         triggerOSR(true, BACKEDGE_THRESHOLD);

    59         triggerOSR(false, BACKEDGE_THRESHOLD);

    60         // Wait for compilation

    61         CompilerWhiteBoxTest.waitBackgroundCompilation(method);

    62         // Deoptimize

    63         WHITE_BOX.deoptimizeMethod(method, true);

    64         if (WHITE_BOX.isMethodCompiled(method, true)) {

    65             throw new AssertionError("Not all OSR compiled versions were deoptimized");

    66         }

    67     }

    68 

    69     /**

    70      * Triggers OSR compilations by executing loops.

    71      *

    72      * @param first Determines which loop to execute

    73      * @param limit The number of loop iterations

    74      */

    75     public void triggerOSR(boolean first, long limit) {

    76         if (limit != 1) {

    77             // Warmup method to avoid uncommon traps

    78             for (int i = 0; i < limit; ++i) {

    79                 triggerOSR(first, 1);

    80             }

    81             CompilerWhiteBoxTest.waitBackgroundCompilation(method);

    82         }

    83         if (first) {

    84             // Trigger OSR compilation 1

    85             for (int i = 0; i < limit; ++i) {

    86                 counter++;

    87             }

    88         } else {

    89             // Trigger OSR compilation 2

    90             for (int i = 0; i < limit; ++i) {

    91                 counter++;

    92             }

    93         }

    94     }

    95 }