gdb/contrib/gdb-add-index.sh

   1 #! /bin/sh
   2
   3 # Add a .gdb_index section to a file.
   4
   5 # Copyright (C) 2010-2017 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 index4="${file}.gdb-index"
  41 index5="${file}.debug_names"
  42 debugstr="${file}.debug_str"
  43 debugstrmerge="${file}.debug_str.merge"
  44 debugstrerr="${file}.debug_str.err"
  45
  46 rm -f $index4 $index5 $debugstr $debugstrmerge $debugstrerr
  47 # Ensure intermediate index file is removed when we exit.
  48 trap "rm -f $index4 $index5 $debugstr $debugstrmerge $debugstrerr" 0
  49
  50 $GDB --batch -nx -iex 'set auto-load no' \
  51     -ex "file $file" -ex "save gdb-index $dir" || {
  52     # Just in case.
  53     status=$?
  54     echo "$myname: gdb error generating index for $file" 1>&2
  55     exit $status
  56 }
  57
  58 # In some situations gdb can exit without creating an index.  This is
  59 # not an error.
  60 # E.g., if $file is stripped.  This behaviour is akin to stripping an
  61 # already stripped binary, it's a no-op.
  62 status=0
  63
  64 if test -f "$index4" -a -f "$index5"; then
  65     echo "$myname: Both index types were created for $file" 1>&2
  66     status=1
  67 elif test -f "$index4" -o -f "$index5"; then
  68     if test -f "$index4"; then
  69         index="$index4"
  70         section=".gdb_index"
  71     else
  72         index="$index5"
  73         section=".debug_names"
  74     fi
  75     debugstradd=false
  76     debugstrupdate=false
  77     if test -s "$debugstr"; then
  78         if ! $OBJCOPY --dump-section .debug_str="$debugstrmerge" "$file" /dev/null \
  79                  2>$debugstrerr; then
  80             cat >&2 $debugstrerr
  81             exit 1
  82         fi
  83         if grep -q "can't dump section '.debug_str' - it does not exist" \
  84                   $debugstrerr; then
  85             debugstradd=true
  86         else
  87             debugstrupdate=true
  88             cat >&2 $debugstrerr
  89         fi
  90         cat "$debugstr" >>"$debugstrmerge"
  91     fi
  92
  93     $OBJCOPY --add-section $section="$index" \
  94         --set-section-flags $section=readonly \
  95         $(if $debugstradd; then \
  96               echo --add-section .debug_str="$debugstrmerge"; \
  97               echo --set-section-flags .debug_str=readonly; \
  98           fi; \
  99           if $debugstrupdate; then \
 100               echo --update-section .debug_str="$debugstrmerge"; \
 101           fi) \
 102         "$file" "$file"
 103
 104     status=$?
 105 else
 106     echo "$myname: No index was created for $file" 1>&2
 107     echo "$myname: [Was there no debuginfo? Was there already an index?]" 1>&2
 108 fi
 109
 110 exit $status