/******************************************************************************
* *
* Function: fatal_signal_handler *
* *
* Purpose: handle fatal signals: SIGILL, SIGILL, SIGSEGV, SIGBUS *
* *
******************************************************************************/
static void fatal_signal_handler(int sig, siginfo_t *siginfo, void *context)
{
SIG_CHECK_PARAMS(sig, siginfo, context);
zabbix_log(LOG_LEVEL_CRIT, "Got signal [signal:%d(%s),reason:%d,refaddr:%p]. Crashing ...",
sig, get_signal_name(sig),
SIG_CHECKED_FIELD(siginfo, si_code),
SIG_CHECKED_FIELD_TYPE(siginfo, si_addr, void *));
print_fatal_info(sig, siginfo, context);
exit(FAIL);
}
int zbx_win_exception_filter(unsigned int code, struct _EXCEPTION_POINTERS *ep)
{
zabbix_log(LOG_LEVEL_CRIT, "Unhandled exception %x detected at 0x%p. Crashing ...", code,
ep->ExceptionRecord->ExceptionAddress);
print_fatal_info(ep->ContextRecord);
print_backtrace(ep->ContextRecord);
zabbix_log(LOG_LEVEL_CRIT, "================================");
return EXCEPTION_CONTINUE_SEARCH;
}
static void child_signal_handler(int sig, siginfo_t *siginfo, void *context)
{
if (NULL == siginfo)
{
zabbix_log(LOG_LEVEL_DEBUG, "received [signal:%d(%s)] with NULL siginfo",
sig, get_signal_name(sig));
}
if (NULL == context)
{
zabbix_log(LOG_LEVEL_DEBUG, "received [signal:%d(%s)] with NULL context",
sig, get_signal_name(sig));
}
switch (sig)
{
case SIGALRM:
zabbix_log(LOG_LEVEL_DEBUG, "timeout while answering request");
break;
case SIGILL:
case SIGFPE:
case SIGSEGV:
case SIGBUS:
zabbix_log(LOG_LEVEL_CRIT, "Got signal [signal:%d(%s),reason:%d,refaddr:%p]. Crashing ...",
sig, get_signal_name(sig),
CHECKED_FIELD(siginfo, si_code),
CHECKED_FIELD_TYPE(siginfo, si_addr, void *));
print_fatal_info(sig, siginfo, context);
exit(FAIL);
break;
case SIGUSR1:
zabbix_log(LOG_LEVEL_DEBUG, "Got signal [signal:%d(%s),sender_pid:%d,sender_uid:%d,value_int:%d].",
sig, get_signal_name(sig),
CHECKED_FIELD(siginfo, si_pid),
CHECKED_FIELD(siginfo, si_uid),
CHECKED_FIELD(siginfo, si_value.sival_int));
#ifdef HAVE_SIGQUEUE
if (!PARENT_PROCESS)
{
extern void zbx_sigusr_handler(zbx_task_t task);
zbx_sigusr_handler(CHECKED_FIELD(siginfo, si_value.sival_int));
}
else if (ZBX_TASK_CONFIG_CACHE_RELOAD == CHECKED_FIELD(siginfo, si_value.sival_int))
{
extern unsigned char daemon_type;
if (0 != (daemon_type & ZBX_DAEMON_TYPE_PROXY_PASSIVE))
{
zabbix_log(LOG_LEVEL_WARNING, "forced reloading of the configuration cache"
" cannot be performed for a passive proxy");
}
else
{
union sigval s;
extern pid_t *threads;
s.sival_int = ZBX_TASK_CONFIG_CACHE_RELOAD;
/* threads[0] is configuration syncer (it is set in proxy.c and server.c) */
if (-1 != sigqueue(threads[0], SIGUSR1, s))
{
zabbix_log(LOG_LEVEL_DEBUG, "the signal is redirected to"
" the configuration syncer");
}
else
{
zabbix_log(LOG_LEVEL_ERR, "failed to redirect signal: %s",
zbx_strerror(errno));
}
}
}
#endif
break;
case SIGQUIT:
case SIGINT:
case SIGTERM:
zabbix_log(parent_pid == CHECKED_FIELD(siginfo, si_pid) ? LOG_LEVEL_DEBUG : LOG_LEVEL_WARNING,
"Got signal [signal:%d(%s),sender_pid:%d,sender_uid:%d,reason:%d]. Exiting ...",
sig, get_signal_name(sig),
CHECKED_FIELD(siginfo, si_pid),
CHECKED_FIELD(siginfo, si_uid),
CHECKED_FIELD(siginfo, si_code));
if (!PARENT_PROCESS)
exit(FAIL);
if (0 == exiting)
{
exiting = 1;
zbx_on_exit();
}
break;
case SIGPIPE:
zabbix_log(LOG_LEVEL_DEBUG, "Got signal [signal:%d(%s),sender_pid:%d]. Ignoring ...",
sig, get_signal_name(sig),
CHECKED_FIELD(siginfo, si_pid));
break;
default:
zabbix_log(LOG_LEVEL_WARNING, "Got signal [signal:%d(%s),sender_pid:%d,sender_uid:%d]. Ignoring ...",
sig, get_signal_name(sig),
CHECKED_FIELD(siginfo, si_pid),
CHECKED_FIELD(siginfo, si_uid));
}
}
