1/*
2 * Copyright (c) 2007, 2010, 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#ifndef SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP
26#define SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP
27
28class JniPeriodicCheckerTask;
29
30/*
31 * This gets activated under Xcheck:jni (CheckJNICalls), and is typically
32 * to detect any errors caused by JNI applications, such as signal handler,
33 * hijacking, va 0x0 hijacking either by mmap or an OS error.
34 */
35
36
37class JniPeriodicChecker : AllStatic {
38
39  friend class JniPeriodicCheckerTask;
40
41  private:
42    static JniPeriodicCheckerTask* _task;
43
44  public:
45    // Start/stop task
46    static void engage();
47    static void disengage();
48
49    static bool is_active() { return _task != NULL; }
50
51    static void initialize();
52    static void destroy();
53};
54
55void jniPeriodicChecker_exit();
56
57#endif // SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP
58