1 /* 2 * Copyright (c) 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 TestPLABOutput 26 * @bug 8140585 27 * @summary Check that G1 does not report empty PLAB statistics in the first evacuation. 28 * @requires vm.gc=="G1" | vm.gc=="null" 29 * @key gc 30 * @library /testlibrary /../../test/lib 31 * @build sun.hotspot.WhiteBox 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * @run driver TestPLABOutput 34 */ 35 36 import sun.hotspot.WhiteBox; 37 38 import java.util.regex.Matcher; 39 import java.util.regex.Pattern; 40 41 import jdk.test.lib.OutputAnalyzer; 42 import jdk.test.lib.Platform; 43 import jdk.test.lib.ProcessTools; 44 45 import static jdk.test.lib.Asserts.*; 46 47 public class TestPLABOutput { 48 49 public static void runTest() throws Exception { 50 final String[] arguments = { 51 "-Xbootclasspath/a:.", 52 "-XX:+UnlockExperimentalVMOptions", 53 "-XX:+UnlockDiagnosticVMOptions", 54 "-XX:+WhiteBoxAPI", 55 "-XX:+UseG1GC", 56 "-Xmx10M", 57 "-Xlog:gc+plab=debug", 58 GCTest.class.getName() 59 }; 60 61 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(arguments); 62 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 63 64 output.shouldHaveExitValue(0); 65 66 System.out.println(output.getStdout()); 67 68 String pattern = ".*GC\\(0\\) .*allocated = (\\d+).*"; 69 Pattern r = Pattern.compile(pattern); 70 Matcher m = r.matcher(output.getStdout()); 71 72 if (!m.find()) { 73 throw new RuntimeException("Could not find any PLAB statistics output"); 74 } 75 int allocated = Integer.parseInt(m.group(1)); 76 assertGT(allocated, 0, "Did not allocate any memory during test"); 77 } 78 79 public static void main(String[] args) throws Exception { 80 runTest(); 81 } 82 83 static class GCTest { 84 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 85 86 public static Object holder; 87 88 public static void main(String [] args) { 89 holder = new byte[100]; 90 WB.youngGC(); 91 System.out.println(holder); 92 } 93 } 94 } 95