1 /* 2 * Copyright (c) 2013, 2015, 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 /test/lib 28 * @modules java.base/jdk.internal.misc 29 * java.management 30 * @summary Allocate to get a promotion failure and verify that that heap change logging is present. 31 * @run main HeapChangeLogging 32 */ 33 34 import java.util.regex.Matcher; 35 import java.util.regex.Pattern; 36 37 import jdk.test.lib.process.ProcessTools; 38 import jdk.test.lib.process.OutputAnalyzer; 39 40 public 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 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 }