aoqi@0: /*
aoqi@0: * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0: *
aoqi@0: * This code is free software; you can redistribute it and/or modify it
aoqi@0: * under the terms of the GNU General Public License version 2 only, as
aoqi@0: * published by the Free Software Foundation.
aoqi@0: *
aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0: * accompanied this code).
aoqi@0: *
aoqi@0: * You should have received a copy of the GNU General Public License version
aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0: *
aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0: * or visit www.oracle.com if you need additional information or have any
aoqi@0: * questions.
aoqi@0: */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test TestG1HeapRegionSize
aoqi@0:  * @key gc
aoqi@0:  * @bug 8021879
aoqi@0:  * @summary Verify that the flag G1HeapRegionSize is updated properly
aoqi@0:  * @run main/othervm -Xmx64m TestG1HeapRegionSize 1048576
aoqi@0:  * @run main/othervm -XX:G1HeapRegionSize=2m -Xmx64m TestG1HeapRegionSize 2097152
aoqi@0:  * @run main/othervm -XX:G1HeapRegionSize=3m -Xmx64m TestG1HeapRegionSize 2097152
aoqi@0:  * @run main/othervm -XX:G1HeapRegionSize=64m -Xmx256m TestG1HeapRegionSize 33554432
aoqi@0:  */
aoqi@0: 
aoqi@0: import sun.management.ManagementFactoryHelper;
aoqi@0: import com.sun.management.HotSpotDiagnosticMXBean;
aoqi@0: import com.sun.management.VMOption;
aoqi@0: 
aoqi@0: public class TestG1HeapRegionSize {
aoqi@0: 
aoqi@0:   public static void main(String[] args) {
aoqi@0:     HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
aoqi@0: 
aoqi@0:     VMOption option = diagnostic.getVMOption("UseG1GC");
aoqi@0:     if (option.getValue().equals("false")) {
aoqi@0:       System.out.println("Skipping this test. It is only a G1 test.");
aoqi@0:       return;
aoqi@0:     }
aoqi@0: 
aoqi@0:     String expectedValue = getExpectedValue(args);
aoqi@0:     option = diagnostic.getVMOption("G1HeapRegionSize");
aoqi@0:     if (!expectedValue.equals(option.getValue())) {
aoqi@0:       throw new RuntimeException("Wrong value for G1HeapRegionSize. Expected " + expectedValue + " but got " + option.getValue());
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   private static String getExpectedValue(String[] args) {
aoqi@0:     if (args.length != 1) {
aoqi@0:       throw new RuntimeException("Wrong number of arguments. Expected 1 but got " + args.length);
aoqi@0:     }
aoqi@0:     return args[0];
aoqi@0:   }
aoqi@0: 
aoqi@0: }