1 /*
   2  * Copyright (c) 2014, 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
  27  * @bug 8059624 8064669 8153265
  28  * @summary testing of WB::forceNMethodSweep
  29  * @library /testlibrary /test/lib /
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  * @build compiler.whitebox.ForceNMethodSweepTest
  33  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  34  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  35  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  36  *                   -XX:-TieredCompilation -XX:+WhiteBoxAPI
  37  *                   -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::*
  38  *                   -XX:-BackgroundCompilation -XX:-UseCounterDecay
  39  *                   compiler.whitebox.ForceNMethodSweepTest
  40  */
  41 
  42 package compiler.whitebox;
  43 
  44 import jdk.test.lib.Asserts;
  45 import sun.hotspot.code.BlobType;
  46 
  47 import java.util.EnumSet;
  48 
  49 public class ForceNMethodSweepTest extends CompilerWhiteBoxTest {
  50     public static void main(String[] args) throws Exception {
  51         CompilerWhiteBoxTest.main(ForceNMethodSweepTest::new, args);
  52     }
  53     private final EnumSet<BlobType> blobTypes;
  54     private ForceNMethodSweepTest(TestCase testCase) {
  55         super(testCase);
  56         // to prevent inlining of #method
  57         WHITE_BOX.testSetDontInlineMethod(method, true);
  58         blobTypes = BlobType.getAvailable();
  59     }
  60 
  61     @Override
  62     protected void test() throws Exception {
  63         // prime the asserts: get their bytecodes loaded, any lazy computation
  64         // resolved, and executed once
  65         Asserts.assertGT(1, 0, "message");
  66         Asserts.assertLTE(0, 0, "message");
  67         Asserts.assertLT(-1, 0, "message");
  68 
  69         checkNotCompiled();
  70         guaranteedSweep();
  71         int usage = getTotalUsage();
  72 
  73         compile();
  74         checkCompiled();
  75         int afterCompilation = getTotalUsage();
  76         Asserts.assertGT(afterCompilation, usage,
  77                 "compilation should increase usage");
  78 
  79         guaranteedSweep();
  80         int afterSweep = getTotalUsage();
  81         Asserts.assertLTE(afterSweep, afterCompilation,
  82                 "sweep shouldn't increase usage");
  83 
  84         deoptimize();
  85         guaranteedSweep();
  86         int afterDeoptAndSweep = getTotalUsage();
  87         Asserts.assertLT(afterDeoptAndSweep, afterSweep,
  88                 "sweep after deoptimization should decrease usage");
  89      }
  90 
  91     private int getTotalUsage() {
  92         int usage = 0;
  93         for (BlobType type : blobTypes) {
  94            usage += type.getMemoryPool().getUsage().getUsed();
  95         }
  96         return usage;
  97     }
  98     private void guaranteedSweep() {
  99         // not entrant -> ++stack_traversal_mark -> zombie -> flushed
 100         for (int i = 0; i < 5; ++i) {
 101             WHITE_BOX.fullGC();
 102             WHITE_BOX.forceNMethodSweep();
 103         }
 104     }
 105 }