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comparison test/gc/metaspace/TestCapacityUntilGCWrapAround.java @ 20804:7848fc12602b

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Merge with jdk8u40-b25
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Tue, 07 Apr 2015 14:58:49 +0200
parents b509b7ff561c
children
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20184:84105dcdb05b 20804:7848fc12602b
1 /*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @key gc
27 * @bug 8049831
28 * @library /testlibrary /testlibrary/whitebox
29 * @build TestCapacityUntilGCWrapAround
30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
31 * sun.hotspot.WhiteBox$WhiteBoxPermission
32 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestCapacityUntilGCWrapAround
33 */
34
35 import sun.hotspot.WhiteBox;
36
37 import com.oracle.java.testlibrary.Asserts;
38 import com.oracle.java.testlibrary.Platform;
39
40 public class TestCapacityUntilGCWrapAround {
41 private static long MB = 1024 * 1024;
42 private static long GB = 1024 * MB;
43 private static long MAX_UINT = 4 * GB - 1; // On 32-bit platforms
44
45 public static void main(String[] args) {
46 if (Platform.is32bit()) {
47 WhiteBox wb = WhiteBox.getWhiteBox();
48
49 long before = wb.metaspaceCapacityUntilGC();
50 // Now force possible overflow of capacity_until_GC.
51 long after = wb.incMetaspaceCapacityUntilGC(MAX_UINT);
52
53 Asserts.assertGTE(after, before,
54 "Increasing with MAX_UINT should not cause wrap around: " + after + " < " + before);
55 Asserts.assertLTE(after, MAX_UINT,
56 "Increasing with MAX_UINT should not cause value larger than MAX_UINT:" + after);
57 }
58 }
59 }