1 /*
   2  * Copyright (c) 2016, 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 ClassResolutionTest
  27  * @bug 8144874
  28  * @modules java.base/jdk.internal.misc
  29  * @library /test/lib
  30  * @run driver ClassResolutionTest
  31  */
  32 
  33 import jdk.test.lib.process.OutputAnalyzer;
  34 import jdk.test.lib.process.ProcessTools;
  35 import java.lang.ref.WeakReference;
  36 import java.lang.reflect.Method;
  37 
  38 public class ClassResolutionTest {
  39 
  40     public static class ClassResolutionTestMain {
  41 
  42         public static class Thing1 {
  43             public static int getThingNumber() {
  44                 return 1;
  45             }
  46         };
  47         public static class Thing1Handler {
  48             public static int getThingNumber() {
  49                 return Thing1.getThingNumber();
  50             }
  51         };
  52 
  53         public static void main(String... args) throws Exception {
  54             int x = Thing1Handler.getThingNumber();
  55             System.out.println("ThingNumber: "+Integer.toString(x));
  56         }
  57     }
  58 
  59     public static void main(String... args) throws Exception {
  60 
  61         // (1) class+resolve should turn on.
  62         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:class+resolve=debug",
  63                                                                   ClassResolutionTestMain.class.getName());
  64         OutputAnalyzer o = new OutputAnalyzer(pb.start());
  65         o.shouldContain("[class,resolve] ClassResolutionTest$ClassResolutionTestMain$Thing1Handler ClassResolutionTest$ClassResolutionTestMain$Thing1");
  66         o.shouldContain("[class,resolve] resolve JVM_CONSTANT_MethodHandle");
  67 
  68         // (2) class+resolve should turn off.
  69         pb = ProcessTools.createJavaProcessBuilder("-Xlog:class+resolve=debug",
  70                                                    "-Xlog:class+resolve=off",
  71                                                    ClassResolutionTestMain.class.getName());
  72         o = new OutputAnalyzer(pb.start());
  73         o.shouldNotContain("[class,resolve]");
  74 
  75         // (3) TraceClassResolution should turn on.
  76         pb = ProcessTools.createJavaProcessBuilder("-XX:+TraceClassResolution",
  77                                                    ClassResolutionTestMain.class.getName());
  78         o = new OutputAnalyzer(pb.start());
  79         o.shouldContain("[class,resolve] ClassResolutionTest$ClassResolutionTestMain$Thing1Handler ClassResolutionTest$ClassResolutionTestMain$Thing1");
  80 
  81         // (4) TraceClassResolution should turn off.
  82         pb = ProcessTools.createJavaProcessBuilder("-Xlog:class+resolve=debug",
  83                                                    "-XX:-TraceClassResolution",
  84                                                    ClassResolutionTestMain.class.getName());
  85         o = new OutputAnalyzer(pb.start());
  86         o.shouldNotContain("[class,resolve]");
  87 
  88     };
  89 
  90 }