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)
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=52139
@ -15,6 +15,7 @@ ifinfo Uses the interface MIB to print out all the information
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kdrv KernelDriver; add/list/remove third-party kernel driver
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source to/in/from a kernel source tree.
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kernxref Shellscript to cross reference symbols in the LINT kernel.
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kerninclude Shellscript to find unused #includes in the kernel.
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mid Create a Message-ID database for mailing lists.
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portsinfo Generate list of new ports for last two weeks.
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scsi-defects Get at the primary or grown defect list of a SCSI disk.
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266
tools/tools/kerninclude/kerninclude.sh
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266
tools/tools/kerninclude/kerninclude.sh
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@ -0,0 +1,266 @@
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#!/bin/sh
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# ----------------------------------------------------------------------------
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# "THE BEER-WARE LICENSE" (Revision 42):
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# <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
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# can do whatever you want with this stuff. If we meet some day, and you think
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# this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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# ----------------------------------------------------------------------------
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#
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# $FreeBSD$
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#
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# This script tries to find #include statements which are not needed in
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# the FreeBSD kernel tree.
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#
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# For each include file on the tasklist (set in $includes right below)
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# For each object file (see around line 170 for how these are selected)
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# For each kernel (set in $kernels right below) and all modules
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# if the object exists
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# figure out the sourcefile
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# if the sourcefile doesn't contain "#include $include"
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# continue
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# if object can be compile without $include existing
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# continue /* probably protected by #ifdef something */
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# if object can't be compile with empty file for $include
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# continue /* needed something/
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# if the compiler warnings/errors were different than normal
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# continue /* needed something/
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# if the resulting object were different than normal
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# continue /* needed something */
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# /* didn't need this include */
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# remove $include from source file
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#
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# Takes about 12h to run on a PII/400
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#
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# NOTE: /usr/include is mucked about with!!
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#
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set -e
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# Base of the kernel sources you want to work on
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cd /some/sourcetree/sys
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# Set to true to start from scratch, false to resume
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init=true
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# Which kernels you want to check
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kernels="LINT GENERIC GENERIC98"
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# Which includes you want to check
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includes="*/*.h i386/*/*.h dev/*/*.h cam/scsi/*.h ufs/*/*.h pc98/*/*.h netatm/*/*.h i4b/*/*.h"
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check_it ()
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{
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if [ -f ::$2 ] ; then
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if grep "#[ ]*include[ ].$1." ::$2 > /dev/null; then
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src=`ls -l ::$2 | awk '{print $11}'`
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else
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echo " -"
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exit 0
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fi
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else
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rm -f $2
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make -n $2 > _0 2>&1 || true
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src=`awk '$1 == "cc" {print $NF}' _0`
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if expr "x$src" : 'x.*\.c$' > /dev/null ; then
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ln -s $src ::$2
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else
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echo " not C source"
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# don't create $2, we don't care about it.
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exit 0
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fi
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if grep "#[ ]*include[ ].$1." $src > /dev/null; then
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true
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else
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echo " -"
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touch $2
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exit 0
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fi
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fi
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rm ../../$1
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rm -f $2
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if [ -f /usr/include/$1 ] ; then
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mv /usr/include/$1 /usr/include/${1}_
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make $2 > _0 2>&1 || true
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mv /usr/include/${1}_ /usr/include/$1
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else
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make $2 > _0 2>&1 || true
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fi
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echo > ../../$1
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if [ -f $2 ] ; then
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echo " no read"
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cp ../../${1}_ ../../$1
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exit 0
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fi
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make $2 > _1 2>&1 || true
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cp ../../${1}_ ../../$1
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if [ ! -f $2 ] ; then
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echo " compile error"
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touch $2
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exit 0
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fi
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m2=`md5 < $2`
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rm $2
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make $2 > _0 2>&1 || true
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if [ ! -f $2 ] ; then
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echo "$2 reference compile failed"
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touch $2
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cat _0
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exit 0
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fi
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m1=`md5 < $2`
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if cmp _0 _1 > /dev/null 2>&1 ; then
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true
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else
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echo " warnings changed"
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exit 0
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fi
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if [ $m1 != $m2 ] ; then
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echo " MD5 changed"
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exit 0
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fi
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}
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if $init ; then
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(
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cd modules
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make clean > /dev/null 2>&1
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make cleandir > /dev/null 2>&1
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make cleandir > /dev/null 2>&1
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make clean > /dev/null 2>&1
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make clean > /dev/null 2>&1
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)
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(
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cd compile
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ls | grep -v CVS | xargs rm -rf
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)
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(
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cd i386/conf
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for i in $kernels
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do
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if [ -f $i ] ; then
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config -r $i
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fi
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done
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cd ../../pc98/conf
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for i in $kernels
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do
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if [ -f $i ] ; then
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config -r $i
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fi
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done
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)
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for i in $kernels
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do
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(
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echo "Compiling $i"
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cd compile/$i
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rm -f ::*
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make -k > x.0 2>&1
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tail -4 x.0
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)
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done
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(
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echo "Compiling modules"
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cd modules
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rm -f */::*
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make -k > x.0 2>&1 || true
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)
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fi
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# Generate the list of object files we want to check
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# you can put a convenient grep right before the sort
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# if you want just some specific subset of files checked
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(
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cd modules
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for i in *
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do
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if [ -d $i -a $i != CVS ] ; then
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( cd $i ; ls *.o 2>/dev/null || true)
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fi
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done
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cd ../compile
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for i in $kernels
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do
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( cd $i ; ls *.o 2>/dev/null )
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done
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) | sed '
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/aicasm/d
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/genassym/d
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/vers.o/d
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/setdef0.o/d
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/setdef1.o/d
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/::/d
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' | sort -u > _
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objlist=`cat _`
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find . -name '*.h_' -print | xargs rm -f
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for incl in $includes
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do
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if [ ! -f ${incl} ] ; then
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continue
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fi
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if [ ! -f ${incl}_ ] ; then
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cp $incl ${incl}_
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fi
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for obj in $objlist
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do
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(
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echo -n "$incl $obj:"
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src=""
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cd compile
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for i in $kernels
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do
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cd $i
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if [ ! -f $obj ] ; then
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cd ..
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continue
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fi
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echo -n " [$i]"
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check_it $incl $obj
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cd ..
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done
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cd ..
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cd modules
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for d in */$obj
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do
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if [ ! -f $d ] ; then
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continue
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fi
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b=`dirname $d`
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echo -n " [$b]"
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cd $b
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check_it $incl $obj
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cd ..
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done
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cd ..
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if [ "x$src" = "x" ] ; then
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echo " -"
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exit 0
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fi
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echo -n " ($src)"
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echo " BINGO!"
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echo "$incl $src" >> _incl
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(
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cd compile/LINT
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grep -v "#[ ]*include[ ]*.$incl." $src > ${src}_
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mv ${src}_ $src
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)
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)
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done
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done
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