fullcircle

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0-only
   3 # Copyright © 2019 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   4 # Use pfunct to produce compilable output from a object, then do a codiff -s
   5 # To see if the type information generated from source code generated
   6 # from type information in a file compiled from the original source code matches.
   7
   8 if [ $# -eq 0 ] ; then
   9         echo "Usage: fullcircle <filename_with_type_info>"
  10         exit 1
  11 fi
  12
  13 file=$1
  14
  15 nr_cus=$(readelf -wi ${file} | grep DW_TAG_compile_unit | wc -l)
  16 if [ $nr_cus -gt 1 ]; then
  17         exit 0
  18 fi
  19
  20 c_output=$(mktemp /tmp/fullcircle.XXXXXX.c)
  21 o_output=$(mktemp /tmp/fullcircle.XXXXXX.o)
  22 pfunct_bin=${PFUNCT-"pfunct"}
  23 codiff_bin=${CODIFF-"codiff"}
  24
  25 # See how your DW_AT_producer looks like and find the
  26 # right regexp to get after the GCC version string, this one
  27 # seems good enough for Red Hat/Fedora/CentOS that look like:
  28 #
  29 #   DW_AT_producer    : (indirect string, offset: 0x3583): GNU C89 8.2.1 20181215 (Red Hat 8.2.1-6) -mno-sse -mno-mmx
  30 #
  31 # So we need from -mno-sse onwards
  32
  33 CFLAGS=$(readelf -wi $file | grep -w DW_AT_producer | sed -r      's/.*\)( -[[:alnum:]]+.*)+/\1/g')
  34
  35 # Check if we managed to do the sed or if this is something like GNU AS
  36 [ "${CFLAGS/DW_AT_producer/}" != "${CFLAGS}" ] && exit
  37
  38 ${pfunct_bin} --compile $file > $c_output
  39 gcc $CFLAGS -c -g $c_output -o $o_output
  40 ${codiff_bin} -q -s $file $o_output
  41
  42 rm -f $c_output $o_output
  43 exit 0