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/****************************************************************
* *
* Copyright 2001, 2013 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
/* jobexam signal processor:
a very simplistic stripped down version of generic_signal_handler(). It is
only intended to handle terminal errors during execution of the $zjobexam
function. These are currently SIGSEGV and SIGBUS. On receipt, we use
rts error to drive the appropriate message and let the condition handler
take care of it.
*/
#include "mdef.h"
#include "gtm_string.h"
#include <signal.h>
#include "gtm_inet.h"
#include "gtm_stdio.h"
#include "error.h"
#include "gtmsiginfo.h"
#include "gtmimagename.h"
#include "jobexam_signal_handler.h"
#include "send_msg.h"
#include "gtmmsg.h"
GBLREF uint4 process_id;
GBLREF enum gtmImageTypes image_type;
GBLREF boolean_t need_core;
DEBUG_ONLY(GBLREF boolean_t ok_to_UNWIND_in_exit_handling;)
LITREF gtmImageName gtmImageNames[];
error_def(ERR_JOBEXAMFAIL);
error_def(ERR_KILLBYSIG);
error_def(ERR_KILLBYSIGUINFO);
error_def(ERR_KILLBYSIGSINFO1);
error_def(ERR_KILLBYSIGSINFO2);
error_def(ERR_KILLBYSIGSINFO3);
void jobexam_signal_handler(int sig, siginfo_t *info, void *context)
{
siginfo_t exi_siginfo;
gtmsiginfo_t signal_info;
gtm_sigcontext_t exi_context, *context_ptr;
if (NULL != info)
exi_siginfo = *info;
else
memset(&exi_siginfo, 0, SIZEOF(*info));
#if defined(__ia64) && defined(__hpux)
context_ptr = (gtm_sigcontext_t *)context; /* no way to make a copy of the context */
memset(&exi_context, 0, SIZEOF(exi_context));
#else
if (NULL != context)
exi_context = *(gtm_sigcontext_t *)context;
else
memset(&exi_context, 0, SIZEOF(exi_context));
context_ptr = &exi_context;
#endif
extract_signal_info(sig, &exi_siginfo, context_ptr, &signal_info);
switch(signal_info.infotype)
{
case GTMSIGINFO_NONE:
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(6) ERR_KILLBYSIG, 4, GTMIMAGENAMETXT(image_type), process_id, sig);
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(6) ERR_KILLBYSIG, 4, GTMIMAGENAMETXT(image_type), process_id, sig);
break;
case GTMSIGINFO_USER:
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(8) ERR_KILLBYSIGUINFO, 6, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.send_pid, signal_info.send_uid);
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(8) ERR_KILLBYSIGUINFO, 6, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.send_pid, signal_info.send_uid);
break;
case GTMSIGINFO_ILOC + GTMSIGINFO_BADR:
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(8) ERR_KILLBYSIGSINFO1, 6, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.int_iadr, signal_info.bad_vadr);
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(8) ERR_KILLBYSIGSINFO1, 6, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.int_iadr, signal_info.bad_vadr);
break;
case GTMSIGINFO_ILOC:
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_KILLBYSIGSINFO2, 5, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.int_iadr);
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_KILLBYSIGSINFO2, 5, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.int_iadr);
break;
case GTMSIGINFO_BADR:
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_KILLBYSIGSINFO3, 5, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.bad_vadr);
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_KILLBYSIGSINFO3, 5, GTMIMAGENAMETXT(image_type),
process_id, sig, signal_info.bad_vadr);
break;
default:
GTMASSERT;
}
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(3) ERR_JOBEXAMFAIL, 1, process_id);
/* Create a core to examine later. Note this handler is only enabled for two fatal core types so we don't
* do any futher checking in this regard.
*/
need_core = TRUE;
gtm_fork_n_core();
/* Note this routine do NOT invoke create_fatal_error_zshow_dmp() because it would in turn call jobexam
* again which would loop us right back around to here. We basically want to do UNWIND(NULL, NULL) logic
* but the UNWIND macro can only be used in a condition handler so next is a block that pretends it is
* our condition handler and does the needful.
*/
{ /* Needs new block since START_CH declares a new var used in UNWIND() */
int arg = 0; /* Needed for START_CH macro if debugging enabled */
START_CH(TRUE);
DEBUG_ONLY(ok_to_UNWIND_in_exit_handling = TRUE);
UNWIND(NULL, NULL);
}
}
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