Mercurial > hg > truffle
comparison test/gc/TestObjectAlignment.java @ 12229:ff218fdb30ba
8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs
Summary: Correctly calculate the initialization value for the shift between object start and bitmap bit in the G1 mark bitmaps.
Reviewed-by: tonyp
author | tschatzl |
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date | Wed, 11 Sep 2013 10:19:16 +0200 |
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12228:f7bc2ab5f659 | 12229:ff218fdb30ba |
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1 /* | |
2 * Copyright (c) 2013, 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 TestObjectAlignment | |
26 * @key gc | |
27 * @bug 8021823 | |
28 * @summary G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs | |
29 * @library /testlibrary | |
30 * @run main/othervm TestObjectAlignment -Xmx20M -XX:+ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=8 | |
31 * @run main/othervm TestObjectAlignment -Xmx20M -XX:+ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=16 | |
32 * @run main/othervm TestObjectAlignment -Xmx20M -XX:+ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=32 | |
33 * @run main/othervm TestObjectAlignment -Xmx20M -XX:+ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=64 | |
34 * @run main/othervm TestObjectAlignment -Xmx20M -XX:+ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=128 | |
35 * @run main/othervm TestObjectAlignment -Xmx20M -XX:+ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=256 | |
36 * @run main/othervm TestObjectAlignment -Xmx20M -XX:-ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=8 | |
37 * @run main/othervm TestObjectAlignment -Xmx20M -XX:-ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=16 | |
38 * @run main/othervm TestObjectAlignment -Xmx20M -XX:-ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=32 | |
39 * @run main/othervm TestObjectAlignment -Xmx20M -XX:-ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=64 | |
40 * @run main/othervm TestObjectAlignment -Xmx20M -XX:-ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=128 | |
41 * @run main/othervm TestObjectAlignment -Xmx20M -XX:-ExplicitGCInvokesConcurrent -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=256 | |
42 */ | |
43 | |
44 import com.oracle.java.testlibrary.ProcessTools; | |
45 import com.oracle.java.testlibrary.OutputAnalyzer; | |
46 | |
47 public class TestObjectAlignment { | |
48 | |
49 public static byte[] garbage; | |
50 | |
51 private static boolean runsOn32bit() { | |
52 return System.getProperty("sun.arch.data.model").equals("32"); | |
53 } | |
54 | |
55 public static void main(String[] args) throws Exception { | |
56 if (runsOn32bit()) { | |
57 // 32 bit VMs do not allow setting ObjectAlignmentInBytes, so there is nothing to test. We still get called. | |
58 return; | |
59 } | |
60 for (int i = 0; i < 10; i++) { | |
61 garbage = new byte[1000]; | |
62 System.gc(); | |
63 } | |
64 } | |
65 } |