Mercurial > hg > truffle
comparison test/runtime/7107135/TestMT.java @ 8710:9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
Summary: Detect the execstack attribute of the loaded library and attempt to fix the stack guard using Safepoint op.
Reviewed-by: dholmes, zgu
Contributed-by: ioi.lam@oracle.com
author | iklam |
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date | Tue, 05 Mar 2013 13:55:56 -0800 |
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8709:255c0a4cb4eb | 8710:9058789475af |
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1 /* | |
2 * Copyright (c) 2002-2013, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright (c) 2011 SAP AG. All Rights Reserved. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 */ | |
24 | |
25 class TestMT { | |
26 | |
27 static boolean loadLib(String libName) { | |
28 try { | |
29 System.loadLibrary(libName); | |
30 System.out.println("Loaded library "+ libName + "."); | |
31 return true; | |
32 } catch (SecurityException e) { | |
33 System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n"); | |
34 } catch (UnsatisfiedLinkError e) { | |
35 System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n"); | |
36 } | |
37 return false; | |
38 } | |
39 | |
40 public static int counter = 1; | |
41 static int Runner() { | |
42 counter = counter * -1; | |
43 int i = counter; | |
44 if (counter < 2) counter += Runner(); | |
45 return i; | |
46 } | |
47 | |
48 public static int run(String msg) { | |
49 try { | |
50 Runner(); | |
51 } catch (StackOverflowError e) { | |
52 System.out.println(msg + " caught stack overflow error."); | |
53 return 0; | |
54 } catch (OutOfMemoryError e) { | |
55 return 0; | |
56 } | |
57 return 2; | |
58 } | |
59 | |
60 public static void main(String argv[]) { | |
61 try { | |
62 for (int i = 0; i < 20; i++) { | |
63 Thread t = new DoStackOverflow("SpawnedThread " + i); | |
64 t.start(); | |
65 } | |
66 run("Main thread"); | |
67 loadLib("test-rwx"); | |
68 run("Main thread"); | |
69 } catch (Exception e) { | |
70 System.out.println(e); | |
71 } | |
72 } | |
73 | |
74 static class DoStackOverflow extends Thread { | |
75 public DoStackOverflow(String name) { | |
76 super(name); | |
77 } | |
78 public void run() { | |
79 for (int i = 0; i < 10; ++i) { | |
80 TestMT.run(getName()); | |
81 yield(); | |
82 } | |
83 } | |
84 } | |
85 } |