Mercurial > hg > truffle
comparison test/runtime/memory/ReserveMemory.java @ 10157:f32b6c267d2e
8012015: Use PROT_NONE when reserving memory
Summary: Reserved memory had PROT_READ+PROT_WRITE access on Linux/bsd, now changed to PROT_NONE.
Reviewed-by: dholmes, ctornqvi
author | mikael |
---|---|
date | Mon, 29 Apr 2013 11:03:49 -0700 |
parents | |
children | f54c85acc043 |
comparison
equal
deleted
inserted
replaced
10156:c53e49efe6a8 | 10157:f32b6c267d2e |
---|---|
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 | |
26 * @key regression | |
27 * @bug 8012015 | |
28 * @summary Make sure reserved (but uncommitted) memory is not accessible | |
29 * @library /testlibrary /testlibrary/whitebox | |
30 * @build ReserveMemory | |
31 * @run main ClassFileInstaller sun.hotspot.WhiteBox | |
32 * @run main ReserveMemory | |
33 */ | |
34 | |
35 import com.oracle.java.testlibrary.*; | |
36 | |
37 import java.lang.reflect.Field; | |
38 import sun.hotspot.WhiteBox; | |
39 import sun.misc.Unsafe; | |
40 | |
41 public class ReserveMemory { | |
42 private static Unsafe getUnsafe() throws Exception { | |
43 Field f = Unsafe.class.getDeclaredField("theUnsafe"); | |
44 f.setAccessible(true); | |
45 return (Unsafe)f.get(null); | |
46 } | |
47 | |
48 private static boolean isWindows() { | |
49 return System.getProperty("os.name").toLowerCase().startsWith("win"); | |
50 } | |
51 | |
52 public static void main(String args[]) throws Exception { | |
53 if (args.length > 0) { | |
54 long address = WhiteBox.getWhiteBox().reserveMemory(4096); | |
55 | |
56 System.out.println("Reserved memory at address: 0x" + Long.toHexString(address)); | |
57 System.out.println("Will now read from the address, expecting a crash!"); | |
58 | |
59 int x = getUnsafe().getInt(address); | |
60 | |
61 throw new Exception("Read of reserved/uncommitted memory unexpectedly succeeded, expected crash!"); | |
62 } | |
63 | |
64 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( | |
65 "-Xbootclasspath/a:.", | |
66 "-XX:+UnlockDiagnosticVMOptions", | |
67 "-XX:+WhiteBoxAPI", | |
68 "ReserveMemory", | |
69 "test"); | |
70 | |
71 OutputAnalyzer output = new OutputAnalyzer(pb.start()); | |
72 if (isWindows()) { | |
73 output.shouldContain("EXCEPTION_ACCESS_VIOLATION"); | |
74 } else { | |
75 output.shouldContain("SIGSEGV"); | |
76 } | |
77 } | |
78 } |