--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Critical Fault handling
+ Copyright (C) Andrew Tridgell 1992-1998
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef DEBUG1
+
+#include <sys/types.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#ifdef HAVE_BACKTRACE_SYMBOLS
+#include <execinfo.h>
+#endif
+#include <atalk/logger.h>
+
+#ifndef SIGNAL_CAST
+#define SIGNAL_CAST (RETSIGTYPE (*)(int))
+#endif
+#ifndef SAFE_FREE /* Oh no this is also defined in tdb.h */
+#define SAFE_FREE(x) do { if ((x) != NULL) {free(x); x=NULL;} } while(0)
+#endif
+#define BACKTRACE_STACK_SIZE 64
+
+static void (*cont_fn)(void *);
+
+/*******************************************************************
+ Catch a signal. This should implement the following semantics:
+
+ 1) The handler remains installed after being called.
+ 2) The signal should be blocked during handler execution.
+********************************************************************/
+
+static void (*CatchSignal(int signum,void (*handler)(int )))(int)
+{
+#ifdef HAVE_SIGACTION
+ struct sigaction act;
+ struct sigaction oldact;
+
+ ZERO_STRUCT(act);
+
+ act.sa_handler = handler;
+#if 0
+ /*
+ * We *want* SIGALRM to interrupt a system call.
+ */
+ if(signum != SIGALRM)
+ act.sa_flags = SA_RESTART;
+#endif
+ sigemptyset(&act.sa_mask);
+ sigaddset(&act.sa_mask,signum);
+ sigaction(signum,&act,&oldact);
+ return oldact.sa_handler;
+#else /* !HAVE_SIGACTION */
+ /* FIXME: need to handle sigvec and systems with broken signal() */
+ return signal(signum, handler);
+#endif
+}
+
+/*******************************************************************
+ Something really nasty happened - panic !
+********************************************************************/
+
+static void smb_panic(const char *why)
+{
+#if 0
+ char *cmd;
+ int result;
+#endif
+#ifdef HAVE_BACKTRACE_SYMBOLS
+ void *backtrace_stack[BACKTRACE_STACK_SIZE];
+ size_t backtrace_size;
+ char **backtrace_strings;
+#endif
+
+#ifdef DEVELOPER
+ {
+ extern char *global_clobber_region_function;
+ extern unsigned int global_clobber_region_line;
+
+ if (global_clobber_region_function) {
+ DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]",
+ global_clobber_region_function,
+ global_clobber_region_line));
+ }
+ }
+#endif
+
+#if 0
+ cmd = lp_panic_action();
+ if (cmd && *cmd) {
+ DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
+ result = system(cmd);
+
+ if (result == -1)
+ DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
+ strerror(errno)));
+ else
+ DEBUG(0, ("smb_panic(): action returned status %d\n",
+ WEXITSTATUS(result)));
+ }
+ DEBUG(0,("PANIC: %s\n", why));
+#endif
+
+#ifdef HAVE_BACKTRACE_SYMBOLS
+ /* get the backtrace (stack frames) */
+ backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
+ backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
+
+ LOG(log_error, logtype_default, "BACKTRACE: %d stack frames:\n", backtrace_size);
+
+ if (backtrace_strings) {
+ size_t i;
+
+ for (i = 0; i < backtrace_size; i++)
+ LOG(log_error, logtype_default, " #%u %s", i, backtrace_strings[i]);
+
+ SAFE_FREE(backtrace_strings);
+ }
+
+#endif
+
+}
+
+
+/*******************************************************************
+report a fault
+********************************************************************/
+static void fault_report(int sig)
+{
+ static int counter;
+
+ if (counter) _exit(1);
+
+ counter++;
+
+ LOG(log_error, logtype_default, "===============================================================");
+ LOG(log_error, logtype_default, "INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)getpid(),VERSION);
+ LOG(log_error, logtype_default, "===============================================================");
+
+ smb_panic("internal error");
+
+ if (cont_fn) {
+ cont_fn(NULL);
+#ifdef SIGSEGV
+ CatchSignal(SIGSEGV,SIGNAL_CAST SIG_DFL);
+#endif
+#ifdef SIGBUS
+ CatchSignal(SIGBUS,SIGNAL_CAST SIG_DFL);
+#endif
+ return; /* this should cause a core dump */
+ }
+ exit(1);
+}
+
+/****************************************************************************
+catch serious errors
+****************************************************************************/
+static void sig_fault(int sig)
+{
+ fault_report(sig);
+}
+
+/*******************************************************************
+setup our fault handlers
+********************************************************************/
+void fault_setup(void (*fn)(void *))
+{
+ cont_fn = fn;
+
+#ifdef SIGSEGV
+ CatchSignal(SIGSEGV,SIGNAL_CAST sig_fault);
+#endif
+#ifdef SIGBUS
+ CatchSignal(SIGBUS,SIGNAL_CAST sig_fault);
+#endif
+}
+
+#endif
projects / netatalk.git / blobdiff