dwarves/ctfdwdiff

#!/bin/bash

results_dir=/tmp/ctfdwdiff

diff_one() {
	local obj=$1
	diff=$results_dir/$obj.diff
	ctf=$results_dir/$obj.ctf.c
	dwarf=$results_dir/$obj.dwarf.c
	pahole -Z $obj
	pahole -F ctf $obj > $ctf
	pahole --flat_arrays \
	       --show_private_classes \
	       --fixup_silly_bitfields -F dwarf $obj > $dwarf
	diff -up $dwarf $ctf > $diff
	if [ -s $diff ] ; then
		[ $# -gt 1 ] && vim $results_dir/$obj.diff
		exit 0
	else
		rm -f $diff $ctf $dwarf
	fi
}

rm -rf $results_dir
mkdir $results_dir
find . -type d | \
while read dir ; do
	cd $dir
	ls *.o 2> /dev/null |
	while read obj ; do
		ncus=$(readelf -wi $obj | grep DW_TAG_compile_unit | wc -l)
		if [ $ncus -ne 1 ] ; then
			continue
		fi
		echo $obj
		diff_one $obj $1
	done
	cd - > /dev/null
done