1 /*
   2  * Copyright (c) 2017, 2018, 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  * @test
  26  * @bug 8174749
  27  * @summary MemberNameTable should reuse entries
  28  * @library /test/lib
  29  * @build sun.hotspot.WhiteBox
  30  * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
  31  * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. MemberNameLeak
  32  */
  33 
  34 import java.lang.invoke.*;
  35 import jdk.test.lib.process.OutputAnalyzer;
  36 import jdk.test.lib.process.ProcessTools;
  37 
  38 import sun.hotspot.code.Compiler;
  39 import sun.hotspot.gc.GC;
  40 
  41 public class MemberNameLeak {
  42     static class Leak {
  43       public void callMe() {
  44       }
  45 
  46       public static void main(String[] args) throws Throwable {
  47         Leak leak = new Leak();
  48 
  49         for (int i = 0; i < 10; i++) {
  50           MethodHandles.Lookup lookup = MethodHandles.lookup();
  51           MethodType mt = MethodType.fromMethodDescriptorString("()V", Leak.class.getClassLoader());
  52           // findSpecial leaks some native mem
  53           MethodHandle mh = lookup.findSpecial(Leak.class, "callMe", mt, Leak.class);
  54           mh.invokeExact(leak);
  55         }
  56 
  57         System.gc();  // make mh unused
  58       }
  59     }
  60 
  61     public static void test(String gc) throws Throwable {
  62        // Run this Leak class with logging
  63         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  64                                       "-Xlog:membername+table=trace",
  65                                       "-XX:+UnlockExperimentalVMOptions",
  66                                       gc, Leak.class.getName());
  67         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  68         output.shouldContain("ResolvedMethod entry added for MemberNameLeak$Leak.callMe()V");
  69         output.shouldContain("ResolvedMethod entry found for MemberNameLeak$Leak.callMe()V");
  70         output.shouldContain("ResolvedMethod entry removed");
  71         output.shouldHaveExitValue(0);
  72     }
  73 
  74     public static void main(java.lang.String[] unused) throws Throwable {
  75         test("-XX:+UseG1GC");
  76         test("-XX:+UseParallelGC");
  77         test("-XX:+UseSerialGC");
  78         if (!Compiler.isGraalEnabled()) { // Graal does not support CMS and Shenandoah
  79             test("-XX:+UseConcMarkSweepGC");
  80             if (GC.Shenandoah.isSupported()) {
  81                 test("-XX:+UseShenandoahGC");
  82             }
  83         }
  84     }
  85 }
--- EOF ---