Zabbix

/*

** Zabbix

** Copyright (C) 2001-2022 Zabbix SIA

**

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

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program 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 for more details.

**

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

** along with this program; if not, write to the Free Software

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

**/

​

#include "hardware.h"

​

#include "../common/zbxsysinfo_common.h"

#include "sysinfo.h"

#include <sys/mman.h>

#include <setjmp.h>

#include <signal.h>

#include "zbxalgo.h"

#include "zbxregexp.h"

#include "log.h"

​

static ZBX_THREAD_LOCAL volatile char sigbus_handler_set;

static ZBX_THREAD_LOCAL sigjmp_buf sigbus_jmp_buf;

​

static void sigbus_handler(int signal)

{

    siglongjmp(sigbus_jmp_buf, signal);

}

​

static void install_sigbus_handler(void)

{

    struct sigaction act;

​

    if (0 == sigbus_handler_set)

    {

        sigbus_handler_set = 1;

        act.sa_handler = &sigbus_handler;

        act.sa_flags = SA_NODEFER;

        sigemptyset(&act.sa_mask);

        sigaction(SIGBUS, &act, NULL);

    }

}

​

static void remove_sigbus_handler(void)

{

    struct sigaction act;

​

    if (0 != sigbus_handler_set)

    {

        act.sa_handler = SIG_DFL;

        act.sa_flags = SA_NODEFER;

        sigemptyset(&act.sa_mask);

        sigaction(SIGBUS, &act, NULL);

    }