299 lines
10 KiB
C
299 lines
10 KiB
C
/****************************************************************
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* *
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* Copyright 2005, 2012 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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/* Based on generic_signal_handler without the db engine references like have_crit().
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*
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* If we are nesting our handlers in an improper way, this routine will
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* not return but will immediately invoke core/termination processing.
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*
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* Returns if some condition makes it inadvisable to exit now else invokes the system exit() system call.
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*/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "gtm_unistd.h"
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#include "gtm_stdlib.h" /* for exit() */
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#include "gtm_inet.h"
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#include "gtm_stdio.h"
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#include <signal.h>
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#include "error.h"
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#include "gtmsiginfo.h"
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#include "gtmimagename.h"
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#include "send_msg.h"
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#include "gtmmsg.h"
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#include "gdsroot.h"
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#include "v15_gdsroot.h"
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#include "gtm_facility.h"
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#include "fileinfo.h"
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#include "gdsbt.h"
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#include "v15_gdsbt.h"
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#include "gdsblk.h"
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#include "gdsfhead.h"
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#include "v15_gdsfhead.h"
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#include "gdsblkops.h"
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#include "gtmio.h"
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#include "have_crit.h"
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#include "dbcertify.h"
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/* These fields are defined as globals not because they are used globally but
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* so they will be easily retrievable even in 'pro' cores.
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*/
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GBLDEF siginfo_t exi_siginfo;
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GBLDEF gtm_sigcontext_t exi_context;
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GBLREF VSIG_ATOMIC_T forced_exit;
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GBLREF int4 forced_exit_err;
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GBLREF int4 exi_condition;
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GBLREF enum gtmImageTypes image_type;
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GBLREF boolean_t dont_want_core;
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GBLREF boolean_t created_core;
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GBLREF boolean_t need_core;
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GBLREF uint4 process_id;
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GBLREF volatile int4 exit_state;
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GBLREF volatile unsigned int core_in_progress;
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GBLREF gtmsiginfo_t signal_info;
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GBLREF boolean_t exit_handler_active;
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GBLREF phase_static_area *psa_gbl;
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LITREF gtmImageName gtmImageNames[];
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error_def(ERR_FORCEDHALT);
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error_def(ERR_KILLBYSIG);
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error_def(ERR_KILLBYSIGUINFO);
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error_def(ERR_KILLBYSIGSINFO1);
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error_def(ERR_KILLBYSIGSINFO2);
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error_def(ERR_KILLBYSIGSINFO3);
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error_def(ERR_KRNLKILL);
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void dbcertify_signal_handler(int sig, siginfo_t *info, void *context)
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{
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boolean_t exit_now;
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gtm_sigcontext_t *context_ptr;
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void (*signal_routine)();
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/* Save parameter value in global variables for easy access in core */
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dont_want_core = FALSE; /* (re)set in case we recurse */
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created_core = FALSE; /* we can deal with a second core if needbe */
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exi_condition = sig;
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if (NULL != info)
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exi_siginfo = *info;
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else
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memset(&exi_siginfo, 0, SIZEOF(*info));
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#if defined(__ia64) && defined(__hpux)
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context_ptr = (gtm_sigcontext_t *)context; /* no way to make a copy of the context */
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memset(&exi_context, 0, SIZEOF(exi_context));
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#else
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if (NULL != context)
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exi_context = *(gtm_sigcontext_t *)context;
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else
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memset(&exi_context, 0, SIZEOF(exi_context));
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context_ptr = &exi_context;
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#endif
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/* Check if we are fielding nested immediate shutdown signals */
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if (EXIT_IMMED <= exit_state)
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{
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switch(sig)
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{ /* If we are dealing with one of these three dangerous signals which we have
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* already hit while attempting to shutdown once, die with core now.
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*/
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case SIGSEGV:
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case SIGBUS:
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case SIGILL:
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if (core_in_progress)
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{
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if (exit_handler_active)
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_exit(sig);
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else
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exit(sig);
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}
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++core_in_progress;
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DUMP_CORE;
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GTMASSERT;
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default:
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;
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}
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}
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switch(sig)
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{
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case SIGINT:
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case SIGTERM:
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forced_exit_err = ERR_FORCEDHALT;
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/* If nothing pending AND we have crit or already in exit processing, wait to
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* invoke shutdown.
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*/
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if (EXIT_PENDING_TOLERANT >= exit_state && (psa_gbl->dbc_critical || exit_handler_active))
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{
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forced_exit = TRUE;
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exit_state++; /* Make exit pending, may still be tolerant though */
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return;
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}
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exit_state = EXIT_IMMED;
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send_msg(VARLSTCNT(1) forced_exit_err);
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gtm_putmsg(VARLSTCNT(1) forced_exit_err);
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dont_want_core = TRUE;
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break;
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case SIGQUIT: /* Handle SIGQUIT specially which we ALWAYS want to defer if possible as it is always sent */
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dont_want_core = TRUE;
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extract_signal_info(sig, &exi_siginfo, context_ptr, &signal_info);
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switch(signal_info.infotype)
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{
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case GTMSIGINFO_NONE:
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forced_exit_err = ERR_KILLBYSIG;
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break;
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case GTMSIGINFO_USER:
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forced_exit_err = ERR_KILLBYSIGUINFO;
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break;
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case GTMSIGINFO_ILOC + GTMSIGINFO_BADR:
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forced_exit_err = ERR_KILLBYSIGSINFO1;
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break;
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case GTMSIGINFO_ILOC:
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forced_exit_err = ERR_KILLBYSIGSINFO2;
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break;
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case GTMSIGINFO_BADR:
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forced_exit_err = ERR_KILLBYSIGSINFO3;
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break;
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default:
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exit_state = EXIT_IMMED;
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GTMASSERT;
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}
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/* If nothing pending AND we have crit or already in exit processing, wait to invoke shutdown */
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if (EXIT_PENDING_TOLERANT >= exit_state && (psa_gbl->dbc_critical || exit_handler_active))
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{
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forced_exit = TRUE;
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exit_state++; /* Make exit pending, may still be tolerant though */
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return;
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}
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exit_state = EXIT_IMMED;
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switch(signal_info.infotype)
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{
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case GTMSIGINFO_NONE:
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send_msg(VARLSTCNT(6) ERR_KILLBYSIG, 4, GTMIMAGENAMETXT(image_type), process_id, sig);
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gtm_putmsg(VARLSTCNT(6) ERR_KILLBYSIG, 4, GTMIMAGENAMETXT(image_type), process_id, sig);
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break;
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case GTMSIGINFO_USER:
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send_msg(VARLSTCNT(8) ERR_KILLBYSIGUINFO, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.send_pid, signal_info.send_uid);
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gtm_putmsg(VARLSTCNT(8) ERR_KILLBYSIGUINFO, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.send_pid, signal_info.send_uid);
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break;
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case GTMSIGINFO_ILOC + GTMSIGINFO_BADR:
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send_msg(VARLSTCNT(8) ERR_KILLBYSIGSINFO1, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr, signal_info.bad_vadr);
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gtm_putmsg(VARLSTCNT(8) ERR_KILLBYSIGSINFO1, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr, signal_info.bad_vadr);
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break;
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case GTMSIGINFO_ILOC:
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send_msg(VARLSTCNT(7) ERR_KILLBYSIGSINFO2, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr);
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gtm_putmsg(VARLSTCNT(7) ERR_KILLBYSIGSINFO2, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr);
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break;
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case GTMSIGINFO_BADR:
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send_msg(VARLSTCNT(7) ERR_KILLBYSIGSINFO3, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.bad_vadr);
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gtm_putmsg(VARLSTCNT(7) ERR_KILLBYSIGSINFO3, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.bad_vadr);
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break;
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}
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break;
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#ifdef _AIX
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case SIGDANGER:
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forced_exit_err = ERR_KRNLKILL;
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/* If nothing pending AND we have crit or already in exit processing, wait to invoke shutdown */
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if (EXIT_PENDING_TOLERANT >= exit_state && (psa_gbl->dbc_critical || exit_handler_active))
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{
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forced_exit = TRUE;
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exit_state++; /* Make exit pending, may still be tolerant though */
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return;
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}
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exit_state = EXIT_IMMED;
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send_msg(VARLSTCNT(1) forced_exit_err);
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gtm_putmsg(VARLSTCNT(1) forced_exit_err);
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dont_want_core = TRUE;
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break;
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#endif
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default:
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extract_signal_info(sig, &exi_siginfo, context_ptr, &signal_info);
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switch(signal_info.infotype)
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{
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case GTMSIGINFO_NONE:
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exit_state = EXIT_IMMED;
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send_msg(VARLSTCNT(6) ERR_KILLBYSIG, 4, GTMIMAGENAMETXT(image_type), process_id, sig);
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gtm_putmsg(VARLSTCNT(6) ERR_KILLBYSIG, 4, GTMIMAGENAMETXT(image_type), process_id, sig);
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break;
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case GTMSIGINFO_USER:
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/* This signal was SENT to us so it can wait until we are out of crit to cause an exit */
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forced_exit_err = ERR_KILLBYSIGUINFO;
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/* If nothing pending AND we have crit or already exiting, wait to invoke shutdown */
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if (EXIT_PENDING_TOLERANT >= exit_state && (psa_gbl->dbc_critical || exit_handler_active))
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{
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forced_exit = TRUE;
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exit_state++; /* Make exit pending, may still be tolerant though */
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need_core = TRUE;
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gtm_fork_n_core(); /* Generate "virgin" core while we can */
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return;
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}
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exit_state = EXIT_IMMED;
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send_msg(VARLSTCNT(8) ERR_KILLBYSIGUINFO, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.send_pid, signal_info.send_uid);
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gtm_putmsg(VARLSTCNT(8) ERR_KILLBYSIGUINFO, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.send_pid, signal_info.send_uid);
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break;
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case GTMSIGINFO_ILOC + GTMSIGINFO_BADR:
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exit_state = EXIT_IMMED;
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send_msg(VARLSTCNT(8) ERR_KILLBYSIGSINFO1, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr, signal_info.bad_vadr);
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gtm_putmsg(VARLSTCNT(8) ERR_KILLBYSIGSINFO1, 6, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr, signal_info.bad_vadr);
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break;
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case GTMSIGINFO_ILOC:
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exit_state = EXIT_IMMED;
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send_msg(VARLSTCNT(7) ERR_KILLBYSIGSINFO2, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr);
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gtm_putmsg(VARLSTCNT(7) ERR_KILLBYSIGSINFO2, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.int_iadr);
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break;
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case GTMSIGINFO_BADR:
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exit_state = EXIT_IMMED;
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send_msg(VARLSTCNT(7) ERR_KILLBYSIGSINFO3, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.bad_vadr);
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gtm_putmsg(VARLSTCNT(7) ERR_KILLBYSIGSINFO3, 5, GTMIMAGENAMETXT(image_type),
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process_id, sig, signal_info.bad_vadr);
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break;
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default:
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exit_state = EXIT_IMMED;
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GTMASSERT;
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}
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if (0 != signal_info.sig_err)
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{
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send_msg(VARLSTCNT(1) signal_info.sig_err);
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gtm_putmsg(VARLSTCNT(1) signal_info.sig_err);
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}
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break;
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} /* switch (sig) */
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FFLUSH(stdout);
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if (!dont_want_core)
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{
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need_core = TRUE;
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gtm_fork_n_core();
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}
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/* As on VMS, a mupip stop does not drive the condition handlers unless we are in crit */
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if ((psa_gbl->dbc_critical || SIGTERM != exi_condition) && CHANDLER_EXISTS)
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DRIVECH(exi_condition);
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assert((EXIT_IMMED <= exit_state) || !exit_handler_active);
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exit(-exi_condition);
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}
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