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59 lines
2.3 KiB
59 lines
2.3 KiB
/* |
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* Copyright (c) 2014, 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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/* |
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* @test |
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* @key gc |
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* @bug 8049831 |
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* @library /testlibrary /testlibrary/whitebox |
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* @build TestCapacityUntilGCWrapAround |
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* @run main ClassFileInstaller sun.hotspot.WhiteBox |
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* sun.hotspot.WhiteBox$WhiteBoxPermission |
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestCapacityUntilGCWrapAround |
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*/ |
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import sun.hotspot.WhiteBox; |
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import com.oracle.java.testlibrary.Asserts; |
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import com.oracle.java.testlibrary.Platform; |
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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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if (Platform.is32bit()) { |
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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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}
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