debug/catchsegv.sh

   1 #! /bin/sh
   2
   3 # Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5 # Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   6
   7 # The GNU C Library is free software; you can redistribute it and/or
   8 # modify it under the terms of the GNU Library General Public License as
   9 # published by the Free Software Foundation; either version 2 of the
  10 # License, or (at your option) any later version.
  11
  12 # The GNU C Library is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 # Library General Public License for more details.
  16
  17 # You should have received a copy of the GNU Library General Public
  18 # License along with the GNU C Library; see the file COPYING.LIB.  If not,
  19 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 # Boston, MA 02111-1307, USA.
  21
  22 if test $# -eq 0; then
  23   echo "$0: missing programm name" >&2
  24   echo "Try \`$0 --help' for more information." >&2
  25   exit 1
  26 fi
  27
  28 prog="$1"
  29 shift
  30
  31 if test $# -eq 0; then
  32   case "$prog" in
  33     --h | --he | --hel | --help)
  34       echo 'Usage: catchsegv PROGRAM ARGS...'
  35       echo '  --help      print this help, then exit'
  36       echo '  --version   print version number, then exit'
  37       echo "Report bugs using the \`glibcbug' script to <bugs@gnu.org>."
  38       exit 0
  39       ;;
  40     --v | --ve | --ver | --vers | --versi | --versio | --version)
  41       echo 'catchsegv (GNU libc) @VERSION@'
  42       echo 'Copyright (C) 2001 Free Software Foundation, Inc.
  43 This is free software; see the source for copying conditions.  There is NO
  44 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  45 Written by Ulrich Drepper.'
  46       exit 0
  47       ;;
  48     *)
  49       ;;
  50   esac
  51 fi
  52
  53 segv_output=`basename "$prog"`.segv.$$
  54 # Make sure this output file does not exist.
  55 rm -f "$segv_output"
  56
  57 # Redirect stderr to avoid termination message from shell.
  58 (exec 3>&2 2>/dev/null
  59 LD_PRELOAD=${LD_PRELOAD:+${LD_PRELOAD}:}@SLIB@/libSegFault.so \
  60 SEGFAULT_USE_ALTSTACK=1 \
  61 SEGFAULT_OUTPUT_NAME=$segv_output \
  62 "$prog" ${1+"$@"} 2>&3 3>&-)
  63 exval=$?
  64
  65 # Check for output.  Even if the program terminated correctly it might
  66 # be that a minor process (clone) failed.  Therefore we do not check the
  67 # exit code.
  68 if test -f "$segv_output"; then
  69   # The program caught a signal.  The output is in the file with the
  70   # name we have in SEGFAULT_OUTPUT_NAME.  In the output the names of
  71   # functions in shared objects are available, but names in the static
  72   # part of the program are not.  We use addr2line to get this information.
  73   case $prog in
  74   */*) ;;
  75   *)
  76     old_IFS=$IFS
  77     IFS=:
  78     for p in $PATH; do
  79       test -n "$p" || p=.
  80       if test -f "$p/$prog"; then
  81         prog=$p/$prog
  82       break
  83       fi
  84     done
  85     IFS=$old_IFS
  86     ;;
  87   esac
  88   sed '/Backtrace/q' "$segv_output"
  89   sed '1,/Backtrace/d' "$segv_output" |
  90   (while read line; do
  91      case "$line" in
  92        [*) addr=`echo "$line" | sed 's/^\[\(.*\)\]$/\1/'`
  93            complete=`addr2line -f -e "$prog" $addr 2>/dev/null`
  94            if test $? -eq 0; then
  95              echo "`echo "$complete"|sed 'N;s/\(.*\)\n\(.*\)/\2(\1)/;'`$line"
  96            else
  97              echo "$line"
  98            fi
  99            ;;
 100         *) echo "$line"
 101            ;;
 102      esac
 103    done)
 104    rm -f "$segv_output"
 105 fi
 106
 107 exit $exval