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 TestDisableExplicitGCFlag 26 * @key gc 27 * @bug 8026047 28 * @summary Verify that DisableExplicitGC flag affect System.gc() calls treatment 29 * @library /testlibrary 30 * @build TestDisableExplicitGCFlag 31 * @run main/othervm TestDisableExplicitGCFlag 32 */ 33 34 import com.oracle.java.testlibrary.*; 35 36 public class TestDisableExplicitGCFlag { 37 38 public static void main(String args[]) throws Exception { 39 String options = System.getProperty("test.java.opts"); 40 if (options == null) { 41 options = ""; 42 } 43 44 options = options.replaceAll("-Xloggc:[^ ]*", ""); 45 46 testDisableExplicitGC(true, options); 47 testDisableExplicitGC(false, options); 48 } 49 50 public static void testDisableExplicitGC(boolean disableGC, String options) throws Exception { 51 options += (disableGC ? " -XX:+DisableExplicitGC" : " -XX:-DisableExplicitGC") + 52 " -XX:+PrintGC " + GCProvoker.class.getName(); 53 54 options = options.replaceAll("[\\s]+", " ").trim(); 55 56 ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(options.split(" ")); 57 OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start()); 58 59 analyzer.shouldHaveExitValue(0); 60 61 if (disableGC) { 62 analyzer.shouldNotContain("System.gc"); 63 } else { 64 analyzer.shouldContain("System.gc"); 65 } 66 } 67 68 public static class GCProvoker { 69 70 public static void main(String args[]) { 71 for (int i = 0; i < 100; i++) { 72 System.gc(); 73 } 74 } 75 76 } 77 78 }