Add the machine that goes "BINGO" every time an potentially

unused #include is spotted in the kernel sources.

(This commit message celebrates Monty Pythons 30year aniversary)

1 files changed, 266 insertions, 0 deletions

diff --git a/tools/tools/kerninclude/kerninclude.sh b/tools/tools/kerninclude/kerninclude.sh
new file mode 100644
index 000000000000..abf8dc3cdcf7
--- /dev/null
+++ b/tools/tools/kerninclude/kerninclude.sh
@@ -0,0 +1,266 @@
+#!/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.
+#
+# For each include file on the tasklist (set in $includes right below)
+#    For each object file (see around line 170 for how these are selected)
+#	For each kernel (set in $kernels right below) and all modules
+#	   if the object exists
+#	      figure out the sourcefile
+#	      if the sourcefile doesn't contain "#include $include"
+#	          continue
+#	      if object can be compile without $include existing
+#	          continue /* probably protected by #ifdef something */
+#	      if object can't be compile with empty file for $include 
+#	          continue /* needed something/
+#	      if the compiler warnings/errors were different than normal
+#	          continue /* needed something/
+#	      if the resulting object were different than normal
+#	          continue /* needed something */
+#             /* didn't need this include */
+#	      remove $include from source file
+#
+# Takes about 12h to run on a PII/400
+#
+# NOTE: /usr/include is mucked about with!!
+#
+
+set -e
+
+# Base of the kernel sources you want to work on
+cd /some/sourcetree/sys
+
+# Set to true to start from scratch, false to resume
+init=true
+
+# Which kernels you want to check
+kernels="LINT GENERIC GENERIC98"
+
+# Which includes you want to check
+includes="*/*.h i386/*/*.h dev/*/*.h cam/scsi/*.h ufs/*/*.h pc98/*/*.h netatm/*/*.h i4b/*/*.h"
+
+check_it ()
+{
+	if [ -f ::$2 ] ; then
+		if grep "#[ 	]*include[ 	].$1." ::$2 > /dev/null; then
+			src=`ls -l ::$2 | awk '{print $11}'`
+		else
+			echo " -"
+			exit 0
+		fi
+	else
+		rm -f $2
+		make -n $2 > _0 2>&1 || true
+		src=`awk '$1 == "cc" {print $NF}' _0`
+		if expr "x$src" : 'x.*\.c$' > /dev/null ; then
+			ln -s $src ::$2
+		else
+			echo " not C source"
+			# don't create $2, we don't care about it.
+			exit 0
+		fi
+		if grep "#[ 	]*include[ 	].$1." $src > /dev/null; then
+			true
+		else
+			echo " -"
+			touch $2
+			exit 0
+		fi
+	fi
+	rm ../../$1
+	rm -f $2
+	if [ -f /usr/include/$1 ] ; then
+		mv /usr/include/$1 /usr/include/${1}_
+		make $2 > _0 2>&1 || true
+		mv /usr/include/${1}_ /usr/include/$1
+	else
+		make $2 > _0 2>&1 || true
+	fi
+	echo > ../../$1
+	if [ -f $2 ] ; then
+		echo " no read"
+		cp ../../${1}_ ../../$1
+		exit 0
+	fi
+
+	make $2 > _1 2>&1 || true
+
+	cp ../../${1}_ ../../$1
+	
+	if [ ! -f $2 ] ; then
+		echo " compile error"
+		touch $2
+		exit 0
+	fi
+	m2=`md5 < $2`
+
+	rm $2
+	make $2 > _0 2>&1 || true
+	if [ ! -f $2 ] ; then
+		echo "$2 reference compile failed"
+		touch $2
+		cat _0
+		exit 0
+	fi
+	m1=`md5 < $2`
+
+	if cmp _0 _1 > /dev/null 2>&1 ; then
+		true
+	else
+		echo " warnings changed"
+		exit 0
+	fi
+
+	if [ $m1 != $m2 ] ; then
+		echo " MD5 changed"
+		exit 0
+	fi
+}
+
+
+if $init ; then
+	(
+	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
+	)
+
+	(
+	cd compile
+	ls | grep -v CVS | xargs rm -rf
+	)
+
+	( 
+	cd i386/conf
+	for i in $kernels
+	do
+		if [ -f $i ] ; then
+			config -r $i
+		fi
+	done
+	cd ../../pc98/conf
+	for i in $kernels
+	do
+		if [ -f $i ] ; then
+			config -r $i
+		fi
+	done
+	)
+
+	for i in $kernels
+	do
+		(
+		echo "Compiling $i"
+		cd compile/$i
+		rm -f ::*
+		make -k > x.0 2>&1
+		tail -4 x.0
+		)
+	done
+
+	(
+	echo "Compiling modules"
+	cd modules
+	rm -f */::*
+	make -k > x.0 2>&1 || true
+	)
+fi
+
+# 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
+/::/d
+' | sort -u > _
+
+objlist=`cat _`
+
+find . -name '*.h_' -print | xargs rm -f
+
+for incl in $includes
+do
+	if [ ! -f ${incl} ] ; then
+		continue
+	fi
+	if [ ! -f ${incl}_ ] ; then
+		cp $incl ${incl}_
+	fi
+	for obj in $objlist
+	do
+		(
+		echo -n "$incl $obj:"
+		src=""
+
+		cd compile 
+		for i in $kernels
+		do
+			cd $i
+
+			if [ ! -f $obj ] ; then
+				cd ..
+				continue
+			fi
+			echo -n " [$i]"
+			check_it $incl $obj
+			cd ..
+		done
+		cd ..
+		cd modules
+		for d in */$obj
+		do
+			if [ ! -f $d ] ; then
+				continue
+			fi
+			b=`dirname $d`
+			echo -n " [$b]"
+			cd $b
+			check_it $incl $obj 
+			cd ..
+		done
+		cd ..
+		if [ "x$src" = "x" ] ; then
+			echo " -"
+			exit 0
+		fi
+		echo -n " ($src)"
+		echo " BINGO!"
+		echo "$incl $src" >> _incl
+		(
+		cd compile/LINT
+		grep -v "#[ 	]*include[ 	]*.$incl." $src > ${src}_
+		mv ${src}_ $src
+		)
+		)
+	done
+done
+