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 jdk.testlib.WhiteBox;
  29 import jdk.testlib.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 /../../test/lib
  38  * @build ForceNMethodSweepTest
  39  * @run main ClassFileInstaller jdk.testlib.WhiteBox
  40  *                              jdk.testlib.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 }