jniPeriodicChecker.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2007, 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
25class 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
34class 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
52void jniPeriodicChecker_exit();
53