/*

 * Copyright (c) 1999, 2012, 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 OS_POSIX_VM_OS_POSIX_HPP

#define OS_POSIX_VM_OS_POSIX_HPP

class Posix {

  friend class os;

protected:

  static void print_distro_info(outputStream* st);

  static void print_rlimit_info(outputStream* st);

  static void print_uname_info(outputStream* st);

  static void print_libversion_info(outputStream* st);

  static void print_load_average(outputStream* st);

};

/*

 * Crash protection for the watcher thread. Wrap the callback

 * with a sigsetjmp and in case of a SIGSEGV/SIGBUS we siglongjmp

 * back.

 * To be able to use this - don't take locks, don't rely on destructors,

 * don't make OS library calls, don't allocate memory, don't print,

 * don't call code that could leave the heap / memory in an inconsistent state,

 * or anything else where we are not in control if we suddenly jump out.

 */

class WatcherThreadCrashProtection : public StackObj {

public:

  WatcherThreadCrashProtection();

  bool call(os::CrashProtectionCallback& cb);

  static void check_crash_protection(int signal, Thread* thread);

private:

  void restore();

  sigjmp_buf _jmpbuf;

};