debug/catchsegv.sh

   1 #! /bin/sh
   2
   3 # Copyright (C) 1998 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 prog="$1"
  23 shift
  24 args="$*"
  25
  26 if test $# -eq 0; then
  27   case "$prog" in
  28     --h | --he | --hel | --help)
  29       echo 'Usage: catchsegv PROGRAM ARGS...'
  30       echo '  --help      print this help, then exit'
  31       echo '  --version   print version number, then exit'
  32       echo "Report bugs using the \`glibcbug' script to <bugs@gnu.org>."
  33       exit 0
  34       ;;
  35     --v | --ve | --ver | --vers | --versi | --versio | --version)
  36       echo 'catchsegv (GNU libc) @VERSION@'
  37       echo 'Copyright (C) 1998 Free Software Foundation, Inc.
  38 This is free software; see the source for copying conditions.  There is NO
  39 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  40 Written by Ulrich Drepper.'
  41       exit 0
  42       ;;
  43     *)
  44       ;;
  45   esac
  46 fi
  47
  48 LD_PRELOAD="${LD_PRELOAD:+${LD_PRELOAD}:}@SLIB@/libSegFault.so@SOVER@"
  49 export LD_PRELOAD
  50 SEGFAULT_USE_ALTSTACK=1
  51 export SEGFAULT_USE_ALTSTACK
  52 SEGFAULT_OUTPUT_NAME="${TMPDIR:-/tmp}/`basename $prog`.segv.$$"
  53 export SEGFAULT_OUTPUT_NAME
  54
  55 $prog $args
  56 exval=$?
  57
  58 unset LD_PRELOAD
  59 # Check for an segmentation error.
  60 if test $exval -eq 139; then
  61   # We caught a segmentation error.  The output is in the file with the
  62   # name we have in SEGFAULT_OUTPUT_NAME.  In the output the names of
  63   # functions in shared objects are available, but names in the static
  64   # part of the program are not.  We use addr2line to get this information.
  65   (read line; echo "$line"
  66    read line; echo "$line"
  67    while read line; do
  68      case "$line" in
  69        [*) addr="`echo $line | sed 's/^\[\(.*\)\]$/\1/'`"
  70            complete="`addr2line -f -e $prog $addr 2>/dev/null`"
  71            if test $? -eq 0; then
  72              echo "`echo $complete|sed 's/\(.*\) \(.*\)/\2(\1)/;'`$line"
  73            else
  74              echo "$line"
  75            fi
  76            ;;
  77         *) echo "$line"
  78            ;;
  79      esac
  80    done) < $SEGFAULT_OUTPUT_NAME
  81    rm $SEGFAULT_OUTPUT_NAME
  82 fi
  83
  84 exit $exval