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|
#!/bin/sh
# ----------------------------------------------------------------------------
# "THE BEER-WARE LICENSE" (Revision 42):
# <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
# can do whatever you want with this stuff. If we meet some day, and you think
# this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
# ----------------------------------------------------------------------------
#
# $FreeBSD$
#
# This script tries to find #include statements which are not needed in
# the FreeBSD kernel tree.
#
set -e
# Base of the kernel sources you want to work on
cd /sys
# Set to true to start from scratch, false to resume
init=false
# Which kernels you want to check
kernels="LINT GENERIC GENERIC98"
NO_MODULES=yes
export NO_MODULES
if $init ; then
(
echo "Cleaning modules"
cd modules
make clean > /dev/null 2>&1
make cleandir > /dev/null 2>&1
make cleandir > /dev/null 2>&1
make clean > /dev/null 2>&1
make clean > /dev/null 2>&1
)
(
echo "Cleaning compile"
cd compile
ls | grep -v CVS | xargs rm -rf
)
fi
(
echo "Cleaning temp files"
find . -name '*.h_' -print | xargs rm -f
find . -name '::*' -print | xargs rm -f
find . -name '*.o' -size 0 -print | xargs rm -f
)
echo "Configuring kernels"
(
cd i386/conf
make LINT
if $init ; then
rm -rf ../../compile/LINT ../../compile/GENERIC
fi
config LINT
config GENERIC
)
(
cd pc98/conf
cp -f GENERIC GENERIC98
if $init ; then
rm -rf ../../compile/GENERIC98
fi
config GENERIC98
)
for i in $kernels
do
(
echo "Compiling $i"
cd compile/$i
make > x.0 2>&1
tail -4 x.0
if [ ! -f kernel ] ; then
echo "Error: No $i kernel built"
exit 1
fi
)
done
(
echo "Compiling modules"
cd modules
make > x.0 2>&1
)
# Generate the list of object files we want to check
# you can put a convenient grep right before the sort
# if you want just some specific subset of files checked
(
cd modules
for i in *
do
if [ -d $i -a $i != CVS ] ; then
( cd $i ; ls *.o 2>/dev/null || true)
fi
done
cd ../compile
for i in $kernels
do
( cd $i ; ls *.o 2>/dev/null )
done
) | sed '
/aicasm/d
/genassym/d
/vers.o/d
/setdef0.o/d
/setdef1.o/d
' | sort -u > _
objlist=`cat _`
for o in $objlist
do
l=""
src=""
for k in $kernels
do
if [ ! -f compile/$k/$o ] ; then
continue;
fi
l="$l compile/$k"
if [ "x$src" = "x" ] ; then
cd compile/$k
mv $o ${o}_
make -n $o > _
mv ${o}_ $o
src=compile/$k/`awk '$1 == "cc" {print $NF}' _`
cd ../..
if expr "x$src" : 'x.*\.c$' > /dev/null ; then
true
else
echo NO SRC $o
src=""
fi
fi
done
for m in modules/*
do
if [ ! -d $m -o ! -f $m/$o ] ; then
continue;
fi
l="$l $m"
if [ "x$src" = "x" ] ; then
cd $m
mv $o ${o}_
make -n $o > _
mv ${o}_ $o
src=`awk '$1 == "cc" {print $NF}' _`
cd ../..
if expr "x$src" : 'x.*\.c$' > /dev/null ; then
if [ "`dirname $src`" = "." ] ; then
src="$m/$src"
fi
true
else
echo NO SRC $o
src=""
fi
fi
done
if [ "x$src" = "x" ] ; then
echo "NO SOURCE $o"
continue
fi
echo "OBJ $o"
echo " SRC $src"
grep -n '^[ ]*#[ ]*include' $src | sed '
s/^\([0-9]*\):[ ]*#[ ]*include[ ]*[<"]/\1 /
s/[">].*//
/ opt_/d
' | sort -rn | while read lin incl
do
S=""
echo " INCL $lin $incl"
cp $src ${src}_
# Check if we can compile without this #include line.
sed "${lin}s/.*//" ${src}_ > ${src}
for t in $l
do
cd $t
mv ${o} ${o}_
if make ${o} > _log 2>&1 ; then
if cmp -s ${o} ${o}_ ; then
echo " $t same object"
else
echo " $t changed object"
S=TAG
fi
else
echo " $t used"
S=TAG
fi
mv ${o}_ ${o}
cd ../..
if [ "x$S" != "x" ] ; then
break
fi
done
if [ "x$S" != "x" ] ; then
mv ${src}_ ${src}
continue
fi
# Check if this is because it is a nested #include
for t in $l
do
cd $t
rm -rf foo
mkdir -p foo/${incl}
rmdir foo/${incl}
touch foo/${incl}
mv ${o} ${o}_
if make INCLMAGIC=-Ifoo ${o} > _log2 2>&1 ; then
if cmp -s ${o} ${o}_ ; then
echo " $t still same object"
else
echo " $t changed object"
S=TAG
fi
else
echo " $t nested include"
S=TAG
fi
rm -rf foo
mv ${o}_ ${o}
cd ../..
if [ "x$S" != "x" ] ; then
break
fi
done
if [ "x$S" != "x" ] ; then
mv ${src}_ ${src}
continue
fi
# Check if this is because it is #ifdef'ed out
sed "${lin}s/.*/#error \"BARF\"/" ${src}_ > ${src}
for t in $l
do
cd $t
mv ${o} ${o}_
if make ${o} > /dev/null 2>&1 ; then
echo " $t line not read"
S=TAG
fi
mv ${o}_ ${o}
cd ../..
if [ "x$S" != "x" ] ; then
break
fi
done
mv ${src}_ ${src}
if [ "x$S" != "x" ] ; then
continue
fi
# Check if the warnings changed.
for t in $l
do
cd $t
mv ${o} ${o}_
if make ${o} > _ref 2>&1 ; then
if cmp -s _ref _log ; then
echo " $t same warnings"
else
echo " $t changed warnings"
S=TAG
fi
else
echo "ARGHH!!!"
exit 9
fi
mv ${o}_ ${o}
cd ../..
if [ "x$S" != "x" ] ; then
break
fi
done
if [ "x$S" != "x" ] ; then
continue
fi
cp $src ${src}_
sed "${lin}d" ${src}_ > ${src}
rm ${src}_
touch _again
echo "BINGO $src $lin $incl $obj $l"
done
done
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