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 8027959 8048179
  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.shouldNotContain("[Humongous Register");
  58     output.shouldNotContain("[Humongous Reclaim");
  59     output.shouldHaveExitValue(0);
  60 
  61     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
  62                                                "-XX:+UseStringDeduplication",
  63                                                "-Xmx10M",
  64                                                "-XX:+PrintGCDetails",
  65                                                GCTest.class.getName());
  66 
  67     output = new OutputAnalyzer(pb.start());
  68 
  69     output.shouldContain("[Redirty Cards");
  70     output.shouldNotContain("[Parallel Redirty");
  71     output.shouldNotContain("[Redirtied Cards");
  72     output.shouldContain("[Code Root Purge");
  73     output.shouldContain("[String Dedup Fixup");
  74     output.shouldNotContain("[Young Free CSet");
  75     output.shouldNotContain("[Non-Young Free CSet");
  76     output.shouldContain("[Humongous Register");
  77     output.shouldNotContain("[Humongous Total");
  78     output.shouldNotContain("[Humongous Candidate");
  79     output.shouldContain("[Humongous Reclaim");
  80     output.shouldNotContain("[Humongous Reclaimed");
  81     output.shouldHaveExitValue(0);
  82 
  83     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
  84                                                "-XX:+UseStringDeduplication",
  85                                                "-Xmx10M",
  86                                                "-XX:+PrintGCDetails",
  87                                                "-XX:+UnlockExperimentalVMOptions",
  88                                                "-XX:G1LogLevel=finest",
  89                                                GCTest.class.getName());
  90 
  91     output = new OutputAnalyzer(pb.start());
  92 
  93     output.shouldContain("[Redirty Cards");
  94     output.shouldContain("[Parallel Redirty");
  95     output.shouldContain("[Redirtied Cards");
  96     output.shouldContain("[Code Root Purge");
  97     output.shouldContain("[String Dedup Fixup");
  98     output.shouldContain("[Young Free CSet");
  99     output.shouldContain("[Non-Young Free CSet");
 100     output.shouldContain("[Humongous Register");
 101     output.shouldContain("[Humongous Total");
 102     output.shouldContain("[Humongous Candidate");
 103     output.shouldContain("[Humongous Reclaim");
 104     output.shouldContain("[Humongous Reclaimed");
 105     output.shouldHaveExitValue(0);
 106   }
 107 
 108   private static void testWithToSpaceExhaustionLogs() throws Exception {
 109     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
 110                                                "-Xmx32M",
 111                                                "-Xmn16M",
 112                                                "-XX:+PrintGCDetails",
 113                                                GCTestWithToSpaceExhaustion.class.getName());
 114 
 115     OutputAnalyzer output = new OutputAnalyzer(pb.start());
 116     output.shouldContain("[Evacuation Failure");
 117     output.shouldNotContain("[Recalculate Used");
 118     output.shouldNotContain("[Remove Self Forwards");
 119     output.shouldNotContain("[Restore RemSet");
 120     output.shouldHaveExitValue(0);
 121 
 122     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
 123                                                "-Xmx32M",
 124                                                "-Xmn16M",
 125                                                "-XX:+PrintGCDetails",
 126                                                "-XX:+UnlockExperimentalVMOptions",
 127                                                "-XX:G1LogLevel=finest",
 128                                                GCTestWithToSpaceExhaustion.class.getName());
 129 
 130     output = new OutputAnalyzer(pb.start());
 131     output.shouldContain("[Evacuation Failure");
 132     output.shouldContain("[Recalculate Used");
 133     output.shouldContain("[Remove Self Forwards");
 134     output.shouldContain("[Restore RemSet");
 135     output.shouldHaveExitValue(0);
 136   }
 137 
 138   static class GCTest {
 139     private static byte[] garbage;
 140     public static void main(String [] args) {
 141       System.out.println("Creating garbage");
 142       // create 128MB of garbage. This should result in at least one GC
 143       for (int i = 0; i < 1024; i++) {
 144         garbage = new byte[128 * 1024];
 145       }
 146       System.out.println("Done");
 147     }
 148   }
 149 
 150   static class GCTestWithToSpaceExhaustion {
 151     private static byte[] garbage;
 152     private static byte[] largeObject;
 153     public static void main(String [] args) {
 154       largeObject = new byte[16*1024*1024];
 155       System.out.println("Creating garbage");
 156       // create 128MB of garbage. This should result in at least one GC,
 157       // some of them with to-space exhaustion.
 158       for (int i = 0; i < 1024; i++) {
 159         garbage = new byte[128 * 1024];
 160       }
 161       System.out.println("Done");
 162     }
 163   }
 164 }