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 }