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  * @test TestGCLogMessages
  26  * @bug 8035406 8027295 8035398 8019342
  27  * @summary Ensure that the PrintGCDetails output for a minor GC with G1
  28  * includes the expected necessary messages.
  29  * @key gc
  30  * @library /testlibrary
  31  */
  32 
  33 import com.oracle.java.testlibrary.ProcessTools;
  34 import com.oracle.java.testlibrary.OutputAnalyzer;
  35 
  36 public class TestGCLogMessages {
  37   public static void main(String[] args) throws Exception {
  38     testNormalLogs();
  39     testWithToSpaceExhaustionLogs();
  40   }
  41 
  42   private static void testNormalLogs() throws Exception {
  43 
  44     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
  45                                                               "-Xmx10M",
  46                                                               GCTest.class.getName());
  47 
  48     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  49 
  50     output.shouldNotContain("[Redirty Cards");
  51     output.shouldNotContain("[Parallel Redirty");
  52     output.shouldNotContain("[Redirtied Cards");
  53     output.shouldNotContain("[Code Root Purge");
  54     output.shouldNotContain("[String Dedup Fixup");
  55     output.shouldNotContain("[Young Free CSet");
  56     output.shouldNotContain("[Non-Young Free CSet");
  57     output.shouldHaveExitValue(0);
  58 
  59     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
  60                                                "-XX:+UseStringDeduplication",
  61                                                "-Xmx10M",
  62                                                "-XX:+PrintGCDetails",
  63                                                GCTest.class.getName());
  64 
  65     output = new OutputAnalyzer(pb.start());
  66 
  67     output.shouldContain("[Redirty Cards");
  68     output.shouldNotContain("[Parallel Redirty");
  69     output.shouldNotContain("[Redirtied Cards");
  70     output.shouldContain("[Code Root Purge");
  71     output.shouldContain("[String Dedup Fixup");
  72     output.shouldNotContain("[Young Free CSet");
  73     output.shouldNotContain("[Non-Young Free CSet");
  74     output.shouldHaveExitValue(0);
  75 
  76     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
  77                                                "-XX:+UseStringDeduplication",
  78                                                "-Xmx10M",
  79                                                "-XX:+PrintGCDetails",
  80                                                "-XX:+UnlockExperimentalVMOptions",
  81                                                "-XX:G1LogLevel=finest",
  82                                                GCTest.class.getName());
  83 
  84     output = new OutputAnalyzer(pb.start());
  85 
  86     output.shouldContain("[Redirty Cards");
  87     output.shouldContain("[Parallel Redirty");
  88     output.shouldContain("[Redirtied Cards");
  89     output.shouldContain("[Code Root Purge");
  90     output.shouldContain("[String Dedup Fixup");
  91     output.shouldContain("[Young Free CSet");
  92     output.shouldContain("[Non-Young Free CSet");
  93     output.shouldHaveExitValue(0);
  94   }
  95 
  96   private static void testWithToSpaceExhaustionLogs() throws Exception {
  97     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
  98                                                "-Xmx10M",
  99                                                "-Xmn5M",
 100                                                "-XX:+PrintGCDetails",
 101                                                GCTestWithToSpaceExhaustion.class.getName());
 102 
 103     OutputAnalyzer output = new OutputAnalyzer(pb.start());
 104     output.shouldContain("[Evacuation Failure");
 105     output.shouldNotContain("[Recalculate Used");
 106     output.shouldNotContain("[Remove Self Forwards");
 107     output.shouldNotContain("[Restore RemSet");
 108     output.shouldHaveExitValue(0);
 109 
 110     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
 111                                                "-Xmx10M",
 112                                                "-Xmn5M",
 113                                                "-XX:+PrintGCDetails",
 114                                                "-XX:+UnlockExperimentalVMOptions",
 115                                                "-XX:G1LogLevel=finest",
 116                                                GCTestWithToSpaceExhaustion.class.getName());
 117 
 118     output = new OutputAnalyzer(pb.start());
 119     output.shouldContain("[Evacuation Failure");
 120     output.shouldContain("[Recalculate Used");
 121     output.shouldContain("[Remove Self Forwards");
 122     output.shouldContain("[Restore RemSet");
 123     output.shouldHaveExitValue(0);
 124   }
 125 
 126   static class GCTest {
 127     private static byte[] garbage;
 128     public static void main(String [] args) {
 129       System.out.println("Creating garbage");
 130       // create 128MB of garbage. This should result in at least one GC
 131       for (int i = 0; i < 1024; i++) {
 132         garbage = new byte[128 * 1024];
 133       }
 134       System.out.println("Done");
 135     }
 136   }
 137 
 138   static class GCTestWithToSpaceExhaustion {
 139     private static byte[] garbage;
 140     private static byte[] largeObject;
 141     public static void main(String [] args) {
 142       largeObject = new byte[5*1024*1024];
 143       System.out.println("Creating garbage");
 144       // create 128MB of garbage. This should result in at least one GC,
 145       // some of them with to-space exhaustion.
 146       for (int i = 0; i < 1024; i++) {
 147         garbage = new byte[128 * 1024];
 148       }
 149       System.out.println("Done");
 150     }
 151   }
 152 }