Zabbix

/*

** Copyright (C) 2001-2024 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "hardware.h"

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

#include "../sysinfo.h"

​

#include "zbxalgo.h"

#include "zbxregexp.h"

#include "zbxnum.h"

​

#include <sys/mman.h>

#include <setjmp.h>

#include <signal.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);

    }

    sigbus_handler_set = 0;

}

​

/******************************************************************************