#!/bin/bash
# Copyright © 2019 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
# Use pahole to produce output from BTF and from DWARF, then do a diff
# Use --flat_arrays with DWARF as BTF, like CTF, flattens arrays.

if [ $# -eq 0 ] ; then
	echo "Usage: btfdiff <filename_with_BTF_and_DWARF_info>"
	exit 1
fi

file=$1
btf_output=$(mktemp /tmp/btfdiff.XXXXXX)
dwarf_output=$(mktemp /tmp/btfdiff.XXXXXX)

pahole -F dwarf --flat_arrays $file > $dwarf_output
pahole -F btf $file > $btf_output

diff -up $dwarf_output $btf_output

rm -f $btf_output $dwarf_output
exit 0