/*

 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP

#define SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP

class JniPeriodicCheckerTask;

/*

 * This gets activated under Xcheck:jni (CheckJNICalls), and is typically

 * to detect any errors caused by JNI applications, such as signal handler,

 * hijacking, va 0x0 hijacking either by mmap or an OS error.

 */

class JniPeriodicChecker : AllStatic {

  friend class JniPeriodicCheckerTask;

  private:

    static JniPeriodicCheckerTask* _task;

  public:

    // Start/stop task

    static void engage();

    static void disengage();

    static bool is_active() { return _task != NULL; }

    static void initialize();

    static void destroy();

};

void jniPeriodicChecker_exit();

#endif // SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP