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comparison src/share/vm/runtime/jniPeriodicChecker.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 class JniPeriodicCheckerTask;
26
27 /*
28 * This gets activated under Xcheck:jni (CheckJNICalls), and is typically
29 * to detect any errors caused by JNI applications, such as signal handler,
30 * hijacking, va 0x0 hijacking either by mmap or an OS error.
31 */
32
33
34 class JniPeriodicChecker : AllStatic {
35
36 friend class JniPeriodicCheckerTask;
37
38 private:
39 static JniPeriodicCheckerTask* _task;
40
41 public:
42 // Start/stop task
43 static void engage();
44 static void disengage();
45
46 static bool is_active() { return _task != NULL; }
47
48 static void initialize();
49 static void destroy();
50 };
51
52 void jniPeriodicChecker_exit();