gdb/cc-with-index.sh

   1 #! /bin/sh
   2 # Wrapper around gcc to add the .gdb_index section when running the testsuite.
   3
   4 # Copyright (C) 2010-2012 Free Software Foundation, Inc.
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 # This program requires gdb and objcopy in addition to gcc.
  19 # The default values are gdb from the build tree and objcopy from $PATH.
  20 # They may be overridden by setting environment variables GDB and OBJCOPY
  21 # respectively.
  22 # We assume the current directory is either $obj/gdb or $obj/gdb/testsuite.
  23 #
  24 # Example usage:
  25 #
  26 # bash$ cd $objdir/gdb/testsuite
  27 # bash$ runtest \
  28 #   CC_FOR_TARGET="/bin/sh $srcdir/cc-with-index.sh gcc" \
  29 #   CXX_FOR_TARGET="/bin/sh $srcdir/cc-with-index.sh g++"
  30 #
  31 # For documentation on index files: info -f gdb.info -n "Index Files"
  32
  33 myname=cc-with-index.sh
  34
  35 if [ -z "$GDB" ]
  36 then
  37     if [ -f ./gdb ]
  38     then
  39         GDB="./gdb"
  40     elif [ -f ../gdb ]
  41     then
  42         GDB="../gdb"
  43     elif [ -f ../../gdb ]
  44     then
  45         GDB="../../gdb"
  46     else
  47         echo "$myname: unable to find usable gdb" >&2
  48         exit 1
  49     fi
  50 fi
  51
  52 OBJCOPY=${OBJCOPY:-objcopy}
  53
  54 have_link=unknown
  55 next_is_output_file=no
  56 output_file=a.out
  57
  58 for arg in "$@"
  59 do
  60     if [ "$next_is_output_file" = "yes" ]
  61     then
  62         output_file="$arg"
  63         next_is_output_file=no
  64         continue
  65     fi
  66
  67     # Poor man's gcc argument parser.
  68     # We don't need to handle all arguments, we just need to know if we're
  69     # doing a link and what the output file is.
  70     # It's not perfect, but it seems to work well enough for the task at hand.
  71     case "$arg" in
  72     "-c") have_link=no ;;
  73     "-E") have_link=no ;;
  74     "-S") have_link=no ;;
  75     "-o") next_is_output_file=yes ;;
  76     esac
  77 done
  78
  79 if [ "$next_is_output_file" = "yes" ]
  80 then
  81     echo "$myname: Unable to find output file" >&2
  82     exit 1
  83 fi
  84
  85 if [ "$have_link" = "no" ]
  86 then
  87     "$@"
  88     exit $?
  89 fi
  90
  91 index_file="${output_file}.gdb-index"
  92 if [ -f "$index_file" ]
  93 then
  94     echo "$myname: Index file $index_file exists, won't clobber." >&2
  95     exit 1
  96 fi
  97
  98 output_dir="${output_file%/*}"
  99 [ "$output_dir" = "$output_file" ] && output_dir="."
 100
 101 "$@"
 102 rc=$?
 103 [ $rc != 0 ] && exit $rc
 104 if [ ! -f "$output_file" ]
 105 then
 106     echo "$myname: Internal error: $output_file missing." >&2
 107     exit 1
 108 fi
 109
 110 $GDB --batch-silent -nx -ex "set auto-load no" -ex "file $output_file" -ex "save gdb-index $output_dir"
 111 rc=$?
 112 [ $rc != 0 ] && exit $rc
 113
 114 # GDB might not always create an index.  Cope.
 115 if [ -f "$index_file" ]
 116 then
 117     $OBJCOPY --add-section .gdb_index="$index_file" \
 118         --set-section-flags .gdb_index=readonly \
 119         "$output_file" "$output_file"
 120     rc=$?
 121 else
 122     rc=0
 123 fi
 124
 125 rm -f "$index_file"
 126 exit $rc