1 /*
   2  * Copyright (c) 2013, 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 HeapChangeLogging.java
  26  * @bug 8027440
  27  * @library /testlibrary
  28  * @build HeapChangeLogging
  29  * @summary Allocate to get a promotion failure and verify that that heap change logging is present.
  30  * @run main HeapChangeLogging
  31  *
  32  * Test the output of G1SummarizeRSetStats in conjunction with G1SummarizeRSetStatsPeriod.
  33  */
  34 
  35 import java.util.regex.Matcher;
  36 import java.util.regex.Pattern;
  37 
  38 import com.oracle.java.testlibrary.*;
  39 
  40 public class HeapChangeLogging {
  41   public static void main(String[] args) throws Exception {
  42     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xmx128m", "-Xmn100m", "-XX:+UseSerialGC", "-XX:+PrintGC", "HeapFiller");
  43     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  44     String stdout = output.getStdout();
  45     System.out.println(stdout);
  46     Matcher stdoutMatcher = Pattern.compile("\\[GC .Allocation Failure.*K->.*K\\(.*K\\), .* secs\\]", Pattern.MULTILINE).matcher(stdout);
  47     if (!stdoutMatcher.find()) {
  48       throw new RuntimeException("No proper GC log line found");
  49     }
  50     output.shouldHaveExitValue(0);
  51   }
  52 }
  53 
  54 class HeapFiller {
  55   public static Entry root;
  56   private static final int PAYLOAD_SIZE = 1000;
  57 
  58   public static void main(String[] args) {
  59     root = new Entry(PAYLOAD_SIZE, null);
  60     Entry current = root;
  61     try {
  62       while (true) {
  63         Entry newEntry = new Entry(PAYLOAD_SIZE, current);
  64         current = newEntry;
  65       }
  66     } catch (OutOfMemoryError e) {
  67       root = null;
  68     }
  69 
  70   }
  71 }
  72 
  73 class Entry {
  74   public Entry previous;
  75   public byte[] payload;
  76 
  77   Entry(int payloadSize, Entry previous) {
  78     payload = new byte[payloadSize];
  79     this.previous = previous;
  80   }
  81 }