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  * @requires vm.gc=="Serial" | vm.gc=="null"
  30  * @summary Allocate to get a promotion failure and verify that that heap change logging is present.
  31  * @run main HeapChangeLogging
  32  *
  33  * Test the output of G1SummarizeRSetStats in conjunction with G1SummarizeRSetStatsPeriod.
  34  */
  35 
  36 import java.util.regex.Matcher;
  37 import java.util.regex.Pattern;
  38 
  39 import com.oracle.java.testlibrary.*;
  40 
  41 public class HeapChangeLogging {
  42   public static void main(String[] args) throws Exception {
  43     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xmx128m", "-Xmn100m", "-XX:+UseSerialGC", "-XX:+PrintGC", "HeapFiller");
  44     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  45     String stdout = output.getStdout();
  46     System.out.println(stdout);
  47     Matcher stdoutMatcher = Pattern.compile("\\[GC .Allocation Failure.*K->.*K\\(.*K\\), .* secs\\]", Pattern.MULTILINE).matcher(stdout);
  48     if (!stdoutMatcher.find()) {
  49       throw new RuntimeException("No proper GC log line found");
  50     }
  51     output.shouldHaveExitValue(0);
  52   }
  53 }
  54 
  55 class HeapFiller {
  56   public static Entry root;
  57   private static final int PAYLOAD_SIZE = 1000;
  58 
  59   public static void main(String[] args) {
  60     root = new Entry(PAYLOAD_SIZE, null);
  61     Entry current = root;
  62     try {
  63       while (true) {
  64         Entry newEntry = new Entry(PAYLOAD_SIZE, current);
  65         current = newEntry;
  66       }
  67     } catch (OutOfMemoryError e) {
  68       root = null;
  69     }
  70 
  71   }
  72 }
  73 
  74 class Entry {
  75   public Entry previous;
  76   public byte[] payload;
  77 
  78   Entry(int payloadSize, Entry previous) {
  79     payload = new byte[payloadSize];
  80     this.previous = previous;
  81   }
  82 }