debug: Remove catchsegv and libSegfault (BZ #14913)

Trapping SIGSEGV within the process is error-prone, adds security
issues, and modern analysis design tends to happen out of the
process (either by attaching a debugger or by post-mortem analysis).

The libSegfault also has some design problems, it uses non
async-signal-safe function (backtrace) on signal handler.

There are multiple alternatives if users do want to use similar
functionality, such as sigsegv gnulib module or libsegfault.

1 files changed, 0 insertions, 106 deletions

diff --git a/debug/catchsegv.sh b/debug/catchsegv.sh
deleted file mode 100755
index f8328eee69..0000000000
--- a/debug/catchsegv.sh
+++ /dev/null
@@ -1,106 +0,0 @@
-#!/bin/sh
-# Copyright (C) 1998-2022 Free Software Foundation, Inc.
-# This file is part of the GNU C Library.
-
-# 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
-# <https://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
-@REPORT_BUGS_TO@.
-EOF
-      exit 0
-      ;;
-    --v | --ve | --ver | --vers | --versi | --versio | --version)
-      echo 'catchsegv @PKGVERSION@@VERSION@'
-      echo 'Copyright (C) 2022 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:+${LD_PRELOAD}:}@SLIB@/libSegFault.so \
-SEGFAULT_USE_ALTSTACK=1 \
-SEGFAULT_OUTPUT_NAME=$segv_output \
-"$prog" ${1+"$@"} 2>&3 3>&-)
-exval=$?
-
-# Check for output.  Even if the program terminated correctly it might
-# be that a minor process (clone) failed.  Therefore we do not check the
-# exit code.
-if test -s "$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