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#!/usr/bin/env bash # SPDX-License-Identifier: GPL-2.0 # Linux kernel coccicheck # # Read Documentation/dev-tools/coccinelle.rst # # This script requires at least spatch # version 1.0.0-rc11. DIR="$(dirname $(readlink -f $0))/.." SPATCH="`which ${SPATCH:=spatch}`" if [ ! -x "$SPATCH" ]; then echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/' exit 1 fi SPATCH_VERSION=$($SPATCH --version | head -1 | awk '{print $3}') USE_JOBS="no" $SPATCH --help | grep -e "--jobs" > /dev/null && USE_JOBS="yes" # The verbosity may be set by the environmental parameter V= # as for example with 'make V=1 coccicheck' if [ -n "$V" -a "$V" != "0" ]; then VERBOSE="$V" else VERBOSE=0 fi FLAGS="--very-quiet" # You can use SPFLAGS to append extra arguments to coccicheck or override any # heuristics done in this file as Coccinelle accepts the last options when # options conflict. # # A good example for use of SPFLAGS is if you want to debug your cocci script, # you can for instance use the following: # # $ export COCCI=scripts/coccinelle/misc/irqf_oneshot.cocci # $ make coccicheck MODE=report DEBUG_FILE="all.err" SPFLAGS="--profile --show-trying" M=./drivers/mfd/arizona-irq.c # # "--show-trying" should show you what rule is being processed as it goes to # stdout, you do not need a debug file for that. The profile output will be # be sent to stdout, if you provide a DEBUG_FILE the profiling data can be # inspected there. # # --profile will not output if --very-quiet is used, so avoid it. echo $SPFLAGS | grep -E -e "--profile|--show-trying" 2>&1 > /dev/null if [ $? -eq 0 ]; then FLAGS="--quiet" fi # spatch only allows include directories with the syntax "-I include" # while gcc also allows "-Iinclude" and "-include include" COCCIINCLUDE=${LINUXINCLUDE//-I/-I } COCCIINCLUDE=${COCCIINCLUDE// -include/ --include} if [ "$C" = "1" -o "$C" = "2" ]; then ONLINE=1 if [[ $# -le 0 ]]; then echo '' echo 'Specifying both the variable "C" and rule "coccicheck" in the make command results in a shift count error.' echo '' echo 'Try specifying "scripts/coccicheck" as a value for the CHECK variable instead.' echo '' echo 'Example: make C=2 CHECK=scripts/coccicheck drivers/net/ethernet/ethoc.o' echo '' exit 1 fi # Take only the last argument, which is the C file to test shift $(( $# - 1 )) OPTIONS="$COCCIINCLUDE $1" # No need to parallelize Coccinelle since this mode takes one input file. NPROC=1 else ONLINE=0 OPTIONS="--dir $srcroot $COCCIINCLUDE" # Use only one thread per core by default if hyperthreading is enabled THREADS_PER_CORE=$(LANG=C lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]") if [ -z "$J" ]; then NPROC=$(getconf _NPROCESSORS_ONLN) if [ $THREADS_PER_CORE -gt 1 -a $NPROC -gt 4 ] ; then NPROC=$((NPROC/2)) fi else NPROC="$J" fi fi if [ "$KBUILD_EXTMOD" != "" ] ; then OPTIONS="--patch $srctree $OPTIONS" fi # You can override by using SPFLAGS if [ "$USE_JOBS" = "no" ]; then trap kill_running SIGTERM SIGINT declare -a SPATCH_PID elif [ "$NPROC" != "1" ]; then # Using 0 should work as well, refer to _SC_NPROCESSORS_ONLN use on # https://github.com/rdicosmo/parmap/blob/master/setcore_stubs.c OPTIONS="$OPTIONS --jobs $NPROC --chunksize 1" fi if [ "$MODE" = "" ] ; then if [ "$ONLINE" = "0" ] ; then echo 'You have not explicitly specified the mode to use. Using default "report" mode.' echo 'Available modes are the following: patch, report, context, org, chain' echo 'You can specify the mode with "make coccicheck MODE=<mode>"' echo 'Note however that some modes are not implemented by some semantic patches.' fi MODE="report" fi if [ "$MODE" = "chain" ] ; then if [ "$ONLINE" = "0" ] ; then echo 'You have selected the "chain" mode.' echo 'All available modes will be tried (in that order): patch, report, context, org' fi elif [ "$MODE" = "report" -o "$MODE" = "org" ] ; then FLAGS="--no-show-diff $FLAGS" fi if [ "$ONLINE" = "0" ] ; then echo '' echo 'Please check for false positives in the output before submitting a patch.' echo 'When using "patch" mode, carefully review the patch before submitting it.' echo '' fi run_cmd_parmap() { if [ $VERBOSE -ne 0 ] ; then echo "Running ($NPROC in parallel): $@" fi if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then echo $@>>$DEBUG_FILE $@ 2>>$DEBUG_FILE else echo $@ $@ 2>&1 fi err=$? if [[ $err -ne 0 ]]; then echo "coccicheck failed" exit $err fi } run_cmd_old() { local i if [ $VERBOSE -ne 0 ] ; then echo "Running ($NPROC in parallel): $@" fi for i in $(seq 0 $(( NPROC - 1)) ); do eval "$@ --max $NPROC --index $i &" SPATCH_PID[$i]=$! if [ $VERBOSE -eq 2 ] ; then echo "${SPATCH_PID[$i]} running" fi done wait } run_cmd() { if [ "$USE_JOBS" = "yes" ]; then run_cmd_parmap $@ else run_cmd_old $@ fi } kill_running() { for i in $(seq 0 $(( NPROC - 1 )) ); do if [ $VERBOSE -eq 2 ] ; then echo "Killing ${SPATCH_PID[$i]}" fi kill ${SPATCH_PID[$i]} 2>/dev/null done } # You can override heuristics with SPFLAGS, these must always go last OPTIONS="$OPTIONS $SPFLAGS" coccinelle () { COCCI="$1" OPT=`grep "Options:" $COCCI | cut -d':' -f2` REQ=`grep "Requires:" $COCCI | cut -d':' -f2 | sed "s| ||"` if [ -n "$REQ" ] && ! { echo "$REQ"; echo "$SPATCH_VERSION"; } | sort -CV ; then echo "Skipping coccinelle SmPL patch: $COCCI" echo "You have coccinelle: $SPATCH_VERSION" echo "This SmPL patch requires: $REQ" return fi # The option '--parse-cocci' can be used to syntactically check the SmPL files. # # $SPATCH -D $MODE $FLAGS -parse_cocci $COCCI $OPT > /dev/null if [ $VERBOSE -ne 0 -a $ONLINE -eq 0 ] ; then FILE=${COCCI#$srctree/} echo "Processing `basename $COCCI`" echo "with option(s) \"$OPT\"" echo '' echo 'Message example to submit a patch:' sed -ne 's|^///||p' $COCCI if [ "$MODE" = "patch" ] ; then echo ' The semantic patch that makes this change is available' elif [ "$MODE" = "report" ] ; then echo ' The semantic patch that makes this report is available' elif [ "$MODE" = "context" ] ; then echo ' The semantic patch that spots this code is available' elif [ "$MODE" = "org" ] ; then echo ' The semantic patch that makes this Org report is available' else echo ' The semantic patch that makes this output is available' fi echo " in $FILE." echo '' echo ' More information about semantic patching is available at' echo ' http://coccinelle.lip6.fr/' echo '' if [ "`sed -ne 's|^//#||p' $COCCI`" ] ; then echo 'Semantic patch information:' sed -ne 's|^//#||p' $COCCI echo '' fi fi if [ "$MODE" = "chain" ] ; then run_cmd $SPATCH -D patch \ $FLAGS --cocci-file $COCCI $OPT $OPTIONS || \ run_cmd $SPATCH -D report \ $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || \ run_cmd $SPATCH -D context \ $FLAGS --cocci-file $COCCI $OPT $OPTIONS || \ run_cmd $SPATCH -D org \ $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || exit 1 elif [ "$MODE" = "rep+ctxt" ] ; then run_cmd $SPATCH -D report \ $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff && \ run_cmd $SPATCH -D context \ $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1 else run_cmd $SPATCH -D $MODE $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1 fi } if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then if [ -f $DEBUG_FILE ]; then echo "Debug file $DEBUG_FILE exists, bailing" exit fi else DEBUG_FILE="/dev/null" fi if [ "$COCCI" = "" ] ; then for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do coccinelle $f done else coccinelle $COCCI fi