glibc/debug/catchsegv.sh

#! /bin/sh

# Copyright (C) 1998, 1999 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.

# The GNU C Library 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
# Library General Public License for more details.

# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB.  If not,
# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.

if test $# -eq 0; then
  echo "$0: missing programm name" >&2
  echo "Try \`$0 --help' for more information." >&2
  exit 1
fi

prog="$1"
shift

if test $# -eq 0; then
  case "$prog" in
    --h | --he | --hel | --help)
      echo 'Usage: catchsegv PROGRAM ARGS...'
      echo '  --help      print this help, then exit'
      echo '  --version   print version number, then exit'
      echo "Report bugs using the \`glibcbug' script to <bugs@gnu.org>."
      exit 0
      ;;
    --v | --ve | --ver | --vers | --versi | --versio | --version)
      echo 'catchsegv (GNU libc) @VERSION@'
      echo 'Copyright (C) 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Ulrich Drepper.'
      exit 0
      ;;
    *)
      ;;
  esac
fi

segv_output=`basename "$prog"`.segv.$$
# Make sure this output file does not exist.
rm -f "$segv_output"

# Redirect stderr to avoid termination message from shell.
(exec 3>&2 2>/dev/null
LD_PRELOAD=${LD_PRELOAD:+${LD_PRELOAD}:}@SLIB@/libSegFault.so \
SEGFAULT_USE_ALTSTACK=1 \
SEGFAULT_OUTPUT_NAME=$segv_output \
"$prog" ${1+"$@"} 2>&3 3>&-)
exval=$?

# Check for output.  Even if the program terminated correctly it might
# be that a minor process (clone) failed.  Therefore we do not check the
# exit code.
if test -f "$segv_output"; then
  # The program caught a signal.  The output is in the file with the
  # name we have in SEGFAULT_OUTPUT_NAME.  In the output the names of
  # functions in shared objects are available, but names in the static
  # part of the program are not.  We use addr2line to get this information.
  case $prog in
  */*) ;;
  *)
    old_IFS=$IFS
    IFS=:
    for p in $PATH; do
      test -n "$p" || p=.
      if test -f "$p/$prog"; then
	prog=$p/$prog
      break
      fi
    done
    IFS=$old_IFS
    ;;
  esac
  sed '/Backtrace/q' "$segv_output"
  sed '1,/Backtrace/d' "$segv_output" |
  (while read line; do
     case "$line" in
       [*) addr=`echo "$line" | sed 's/^\[\(.*\)\]$/\1/'`
	   complete=`addr2line -f -e "$prog" $addr 2>/dev/null`
	   if test $? -eq 0; then
             echo "`echo "$complete"|sed 'N;s/\(.*\)\n\(.*\)/\2(\1)/;'`$line"
           else
             echo "$line"
           fi
           ;;
        *) echo "$line"
           ;;
     esac
   done)
   rm -f "$segv_output"
fi

exit $exval