1 /*

     2  * Copyright (c) 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 

    25 import java.lang.reflect.Method;

    26 import java.util.EnumSet;

    27 

    28 import sun.hotspot.WhiteBox;

    29 import sun.hotspot.code.BlobType;

    30 

    31 import com.oracle.java.testlibrary.Asserts;

    32 import com.oracle.java.testlibrary.InfiniteLoop;

    33 

    34 /*

    35  * @test

    36  * @bug 8059624 8064669

    37  * @library /testlibrary /testlibrary/whitebox

    38  * @build ForceNMethodSweepTest

    39  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    40  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

    41  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

    42  *                   -XX:-TieredCompilation -XX:+WhiteBoxAPI

    43  *                   -XX:CompileCommand=compileonly,SimpleTestCase$Helper::*

    44  *                   ForceNMethodSweepTest

    45  * @summary testing of WB::forceNMethodSweep

    46  */

    47 public class ForceNMethodSweepTest extends CompilerWhiteBoxTest {

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

    49         CompilerWhiteBoxTest.main(ForceNMethodSweepTest::new, args);

    50     }

    51     private final EnumSet<BlobType> blobTypes;

    52     private ForceNMethodSweepTest(TestCase testCase) {

    53         super(testCase);

    54         // to prevent inlining of #method

    55         WHITE_BOX.testSetDontInlineMethod(method, true);

    56         blobTypes = BlobType.getAvailable();

    57     }

    58 

    59     @Override

    60     protected void test() throws Exception {

    61         checkNotCompiled();

    62         guaranteedSweep();

    63         int usage = getTotalUsage();

    64 

    65         compile();

    66         checkCompiled();

    67         int afterCompilation = getTotalUsage();

    68         Asserts.assertGT(afterCompilation, usage,

    69                 "compilation should increase usage");

    70 

    71         guaranteedSweep();

    72         int afterSweep = getTotalUsage();

    73         Asserts.assertLTE(afterSweep, afterCompilation,

    74                 "sweep shouldn't increase usage");

    75 

    76         deoptimize();

    77         guaranteedSweep();

    78         int afterDeoptAndSweep = getTotalUsage();

    79         Asserts.assertLT(afterDeoptAndSweep, afterSweep,

    80                 "sweep after deoptimization should decrease usage");

    81      }

    82 

    83     private int getTotalUsage() {

    84         int usage = 0;

    85         for (BlobType type : blobTypes) {

    86            usage += type.getMemoryPool().getUsage().getUsed();

    87         }

    88         return usage;

    89     }

    90     private void guaranteedSweep() {

    91         // not entrant -> ++stack_traversal_mark -> zombie -> reclamation -> flushed

    92         for (int i = 0; i < 5; ++i) {

    93             WHITE_BOX.fullGC();

    94             WHITE_BOX.forceNMethodSweep();

    95         }

    96     }

    97 }