/* * 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 * @key gc * @bug 8049831 * @library /testlibrary /testlibrary/whitebox * @build TestCapacityUntilGCWrapAround * @run main ClassFileInstaller sun.hotspot.WhiteBox * sun.hotspot.WhiteBox$WhiteBoxPermission * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestCapacityUntilGCWrapAround */ import sun.hotspot.WhiteBox; import com.oracle.java.testlibrary.Asserts; import com.oracle.java.testlibrary.Platform; public class TestCapacityUntilGCWrapAround { private static long MB = 1024 * 1024; private static long GB = 1024 * MB; private static long MAX_UINT = 4 * GB - 1; // On 32-bit platforms public static void main(String[] args) { if (Platform.is32bit()) { WhiteBox wb = WhiteBox.getWhiteBox(); long before = wb.metaspaceCapacityUntilGC(); long after = wb.incMetaspaceCapacityUntilGC(MAX_UINT); Asserts.assertGTE(after, before, String.format("Increasing with MAX_UINT should not cause wrap around: %d < %d", after, before)); Asserts.assertEQ(after, MAX_UINT, String.format("Increasing with MAX_UINT should set Metaspace::_capacityUntilGC to max_uint, not: %d", after)); } } }