gdb/contrib/gdb-add-index.sh - gdb

  1. #! /bin/sh

  3. # Add a .gdb_index section to a file.

  5. # Copyright (C) 2010-2015 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/>.

  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}

  24. myname="${0##*/}"

  26. if test $# != 1; then
  27.     echo "usage: $myname FILE" 1>&2
  28.     exit 1
  29. fi

  31. file="$1"

  33. if test ! -r "$file"; then
  34.     echo "$myname: unable to access: $file" 1>&2
  35.     exit 1
  36. fi

  38. dir="${file%/*}"
  39. test "$dir" = "$file" && dir="."
  40. index="${file}.gdb-index"

  42. rm -f $index
  43. # Ensure intermediate index file is removed when we exit.
  44. trap "rm -f $index" 0

  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. }

  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

  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

  69. exit $status