gdb/contrib/gdb-add-index.sh

   1 #! /bin/sh
   2
   3 # Add a .gdb_index section to a file.
   4
   5 # Copyright (C) 2010-2016 Free Software Foundation, Inc.
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 # This program assumes gdb and objcopy are in $PATH.
  20 # If not, or you want others, pass the following in the environment
  21 GDB=${GDB:=gdb}
  22 OBJCOPY=${OBJCOPY:=objcopy}
  23
  24 myname="${0##*/}"
  25
  26 if test $# != 1; then
  27     echo "usage: $myname FILE" 1>&2
  28     exit 1
  29 fi
  30
  31 file="$1"
  32
  33 if test ! -r "$file"; then
  34     echo "$myname: unable to access: $file" 1>&2
  35     exit 1
  36 fi
  37
  38 dir="${file%/*}"
  39 test "$dir" = "$file" && dir="."
  40 index="${file}.gdb-index"
  41
  42 rm -f $index
  43 # Ensure intermediate index file is removed when we exit.
  44 trap "rm -f $index" 0
  45
  46 $GDB --batch -nx -iex 'set auto-load no' \
  47     -ex "file $file" -ex "save gdb-index $dir" || {
  48     # Just in case.
  49     status=$?
  50     echo "$myname: gdb error generating index for $file" 1>&2
  51     exit $status
  52 }
  53
  54 # In some situations gdb can exit without creating an index.  This is
  55 # not an error.
  56 # E.g., if $file is stripped.  This behaviour is akin to stripping an
  57 # already stripped binary, it's a no-op.
  58 status=0
  59
  60 if test -f "$index"; then
  61     $OBJCOPY --add-section .gdb_index="$index" \
  62         --set-section-flags .gdb_index=readonly "$file" "$file"
  63     status=$?
  64 else
  65     echo "$myname: No index was created for $file" 1>&2
  66     echo "$myname: [Was there no debuginfo? Was there already an index?]" 1>&2
  67 fi
  68
  69 exit $status