#! /bin/sh
# Copyright (C) 1998-2014 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# Contributed by Ulrich Drepper <[email protected]>, 1998.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 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
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.

if test $# -eq 0; then
echo "$0: missing program 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 'For bug reporting instructions, please see:'
cat <<\EOF
<https://bugs.launchpad.net/ubuntu/+source/eglibc/+bugs>.
EOF
exit 0
;;
--v | --ve | --ver | --vers | --versi | --versio | --version)
echo 'catchsegv (Ubuntu EGLIBC 2.19-0ubuntu6) 2.19'
echo 'Copyright (C) 2014 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=`mktemp ${TMPDIR:-/tmp}/segv_output.XXXXXX` || exit

# Redirect stderr to avoid termination message from shell.
(exec 3>&2 2>/dev/null
LD_PRELOAD=${LD_PRELOAD:+${LD_PRELOAD}:}/lib/x86_64-linux-gnu/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 -s "$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
line=`echo $line | sed "s@^$prog\\(\\[.*\\)@\1@"`
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 "$line"
;;
esac
done)
fi
rm -f "$segv_output"

exit $exval