60 lines
2.6 KiB
Java
60 lines
2.6 KiB
Java
/*
|
|
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
/**
|
|
* @test TestSmallHeap
|
|
* @bug 8067438
|
|
* @requires vm.gc=="null"
|
|
* @summary Verify that starting the VM with a small heap works
|
|
* @library /testlibrary
|
|
* @run main/othervm -Xmx4m -XX:+UseParallelGC TestSmallHeap
|
|
* @run main/othervm -Xmx4m -XX:+UseSerialGC TestSmallHeap
|
|
* @run main/othervm -Xmx4m -XX:+UseG1GC TestSmallHeap
|
|
* @run main/othervm -Xmx4m -XX:+UseConcMarkSweepGC -XX:CMSMarkStackSizeMax=1032 TestSmallHeap
|
|
*
|
|
* Note: It would be nice to verify the minimal supported heap size here,
|
|
* but that turns out to be quite tricky since we align the heap size based
|
|
* on the card table size. And the card table size is aligned based on the
|
|
* minimal pages size provided by the os. This means that on most platforms,
|
|
* where the minimal page size is 4k, we get a minimal heap size of 2m but
|
|
* on Solaris/Sparc we have a page size of 8k and get a minimal heap size
|
|
* of 8m.
|
|
* There is also no check in the VM for verifying that the maximum heap size
|
|
* is larger than the supported minimal heap size. This means that specifying
|
|
* -Xmx1m on the command line is fine but will give a heap of 2m (or 4m).
|
|
* To work around these rather strange behaviors this test uses 4m for all
|
|
* platforms.
|
|
*/
|
|
|
|
import sun.management.ManagementFactoryHelper;
|
|
import static com.oracle.java.testlibrary.Asserts.*;
|
|
|
|
public class TestSmallHeap {
|
|
|
|
public static void main(String[] args) {
|
|
String maxHeap = ManagementFactoryHelper.getDiagnosticMXBean().getVMOption("MaxHeapSize").getValue();
|
|
String expectedMaxHeap = "4194304";
|
|
assertEQ(maxHeap, expectedMaxHeap);
|
|
}
|
|
}
|