60 lines
2.3 KiB
Java
60 lines
2.3 KiB
Java
/*
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* Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package gc.metaspace;
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/*
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* @test
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* @bug 8049831
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @requires vm.bits == 32
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI gc.metaspace.TestCapacityUntilGCWrapAround
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*/
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import jdk.test.whitebox.WhiteBox;
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import jdk.test.lib.Asserts;
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public class TestCapacityUntilGCWrapAround {
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private static long MB = 1024 * 1024;
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private static long GB = 1024 * MB;
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private static long MAX_UINT = 4 * GB - 1; // On 32-bit platforms
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public static void main(String[] args) {
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WhiteBox wb = WhiteBox.getWhiteBox();
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long before = wb.metaspaceCapacityUntilGC();
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// Now force possible overflow of capacity_until_GC.
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long after = wb.incMetaspaceCapacityUntilGC(MAX_UINT);
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Asserts.assertGTE(after, before,
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"Increasing with MAX_UINT should not cause wrap around: " + after + " < " + before);
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Asserts.assertLTE(after, MAX_UINT,
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"Increasing with MAX_UINT should not cause value larger than MAX_UINT:" + after);
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}
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}
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