debug/catchsegv.sh

   1 #! /bin/sh
   2 # Copyright (C) 1998,1999,2001,2003,2004,2006,2007,2008,2009,2010,2011,2012
   3 # 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 Lesser General Public
   9 # License as published by the Free Software Foundation; either
  10 # version 2.1 of the 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 # Lesser General Public License for more details.
  16
  17 # You should have received a copy of the GNU Lesser General Public
  18 # License along with the GNU C Library; if not, see
  19 # <http://www.gnu.org/licenses/>.
  20
  21 if test $# -eq 0; then
  22   echo "$0: missing program name" >&2
  23   echo "Try \`$0 --help' for more information." >&2
  24   exit 1
  25 fi
  26
  27 prog="$1"
  28 shift
  29
  30 if test $# -eq 0; then
  31   case "$prog" in
  32     --h | --he | --hel | --help)
  33       echo 'Usage: catchsegv PROGRAM ARGS...'
  34       echo '  --help      print this help, then exit'
  35       echo '  --version   print version number, then exit'
  36       echo 'For bug reporting instructions, please see:'
  37       cat <<\EOF
  38 @REPORT_BUGS_TO@.
  39 EOF
  40       exit 0
  41       ;;
  42     --v | --ve | --ver | --vers | --versi | --versio | --version)
  43       echo 'catchsegv @PKGVERSION@@VERSION@'
  44       echo 'Copyright (C) 2012 Free Software Foundation, Inc.
  45 This is free software; see the source for copying conditions.  There is NO
  46 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  47 Written by Ulrich Drepper.'
  48       exit 0
  49       ;;
  50     *)
  51       ;;
  52   esac
  53 fi
  54
  55 segv_output=`mktemp ${TMPDIR:-/tmp}/segv_output.XXXXXX` || exit
  56
  57 # Redirect stderr to avoid termination message from shell.
  58 (exec 3>&2 2>/dev/null
  59 LD_PRELOAD=${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=$?
  64
  65 # Check for output.  Even if the program terminated correctly it might
  66 # be that a minor process (clone) failed.  Therefore we do not check the
  67 # exit code.
  68 if test -s "$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      line=`echo $line | sed "s@^$prog\\(\\[.*\\)@\1@"`
  92      case "$line" in
  93        \[*) addr=`echo "$line" | sed 's/^\[\(.*\)\]$/\1/'`
  94             complete=`addr2line -f -e "$prog" $addr 2>/dev/null`
  95             if test $? -eq 0; then
  96               echo "`echo "$complete"|sed 'N;s/\(.*\)\n\(.*\)/\2(\1)/;'`$line"
  97             else
  98               echo "$line"
  99             fi
 100             ;;
 101          *) echo "$line"
 102             ;;
 103      esac
 104    done)
 105 fi
 106 rm -f "$segv_output"
 107
 108 exit $exval