1/*
2 * Copyright (c) 2013, 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 * @test HeapChangeLogging.java
26 * @bug 8027440
27 * @requires vm.gc.Serial
28 * @library /test/lib
29 * @modules java.base/jdk.internal.misc
30 * @summary Allocate to get a promotion failure and verify that that heap change logging is present.
31 * @run main HeapChangeLogging
32 */
33
34import java.util.regex.Matcher;
35import java.util.regex.Pattern;
36
37import jdk.test.lib.process.ProcessTools;
38import jdk.test.lib.process.OutputAnalyzer;
39
40public class HeapChangeLogging {
41  public static void main(String[] args) throws Exception {
42    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xmx128m", "-Xmn100m", "-XX:+UseSerialGC", "-Xlog:gc", "HeapFiller");
43    OutputAnalyzer output = new OutputAnalyzer(pb.start());
44    String stdout = output.getStdout();
45    System.out.println(stdout);
46    Matcher stdoutMatcher = Pattern.compile(".*\\(Allocation Failure\\) [0-9]+[KMG]->[0-9]+[KMG]\\([0-9]+[KMG]\\)", 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
54class 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
73class 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}
82