2 # SPDX-License-Identifier: GPL-2.0
3 # Linux kernel coccicheck
5 # Read Documentation/dev-tools/coccinelle.rst
7 # This script requires at least spatch
10 DIR="$(dirname $(readlink -f $0))/.."
11 SPATCH="`which ${SPATCH:=spatch}`"
13 if [ ! -x "$SPATCH" ]; then
14 echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
18 SPATCH_VERSION=$($SPATCH --version | head -1 | awk '{print $3}')
21 $SPATCH --help | grep "\-\-jobs" > /dev/null && USE_JOBS="yes"
23 # The verbosity may be set by the environmental parameter V=
24 # as for example with 'make V=1 coccicheck'
26 if [ -n "$V" -a "$V" != "0" ]; then
34 # You can use SPFLAGS to append extra arguments to coccicheck or override any
35 # heuristics done in this file as Coccinelle accepts the last options when
38 # A good example for use of SPFLAGS is if you want to debug your cocci script,
39 # you can for instance use the following:
41 # $ export COCCI=scripts/coccinelle/misc/irqf_oneshot.cocci
42 # $ make coccicheck MODE=report DEBUG_FILE="all.err" SPFLAGS="--profile --show-trying" M=./drivers/mfd/arizona-irq.c
44 # "--show-trying" should show you what rule is being processed as it goes to
45 # stdout, you do not need a debug file for that. The profile output will be
46 # be sent to stdout, if you provide a DEBUG_FILE the profiling data can be
49 # --profile will not output if --very-quiet is used, so avoid it.
50 echo $SPFLAGS | egrep -e "--profile|--show-trying" 2>&1 > /dev/null
55 # spatch only allows include directories with the syntax "-I include"
56 # while gcc also allows "-Iinclude" and "-include include"
57 COCCIINCLUDE=${LINUXINCLUDE//-I/-I }
58 COCCIINCLUDE=${COCCIINCLUDE// -include/ --include}
60 if [ "$C" = "1" -o "$C" = "2" ]; then
63 # Take only the last argument, which is the C file to test
65 OPTIONS="$COCCIINCLUDE $1"
67 # No need to parallelize Coccinelle since this mode takes one input file.
71 if [ "$KBUILD_EXTMOD" = "" ] ; then
72 OPTIONS="--dir $srctree $COCCIINCLUDE"
74 OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
77 # Use only one thread per core by default if hyperthreading is enabled
78 THREADS_PER_CORE=$(lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]")
80 NPROC=$(getconf _NPROCESSORS_ONLN)
81 if [ $THREADS_PER_CORE -gt 1 -a $NPROC -gt 4 ] ; then
89 if [ "$KBUILD_EXTMOD" != "" ] ; then
90 OPTIONS="--patch $srctree $OPTIONS"
93 # You can override by using SPFLAGS
94 if [ "$USE_JOBS" = "no" ]; then
95 trap kill_running SIGTERM SIGINT
97 elif [ "$NPROC" != "1" ]; then
98 # Using 0 should work as well, refer to _SC_NPROCESSORS_ONLN use on
99 # https://github.com/rdicosmo/parmap/blob/master/setcore_stubs.c
100 OPTIONS="$OPTIONS --jobs $NPROC --chunksize 1"
103 if [ "$MODE" = "" ] ; then
104 if [ "$ONLINE" = "0" ] ; then
105 echo 'You have not explicitly specified the mode to use. Using default "report" mode.'
106 echo 'Available modes are the following: patch, report, context, org, chain'
107 echo 'You can specify the mode with "make coccicheck MODE=<mode>"'
108 echo 'Note however that some modes are not implemented by some semantic patches.'
113 if [ "$MODE" = "chain" ] ; then
114 if [ "$ONLINE" = "0" ] ; then
115 echo 'You have selected the "chain" mode.'
116 echo 'All available modes will be tried (in that order): patch, report, context, org'
118 elif [ "$MODE" = "report" -o "$MODE" = "org" ] ; then
119 FLAGS="--no-show-diff $FLAGS"
122 if [ "$ONLINE" = "0" ] ; then
124 echo 'Please check for false positives in the output before submitting a patch.'
125 echo 'When using "patch" mode, carefully review the patch before submitting it.'
130 if [ $VERBOSE -ne 0 ] ; then
131 echo "Running ($NPROC in parallel): $@"
133 if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then
142 if [[ $err -ne 0 ]]; then
143 echo "coccicheck failed"
150 if [ $VERBOSE -ne 0 ] ; then
151 echo "Running ($NPROC in parallel): $@"
153 for i in $(seq 0 $(( NPROC - 1)) ); do
154 eval "$@ --max $NPROC --index $i &"
156 if [ $VERBOSE -eq 2 ] ; then
157 echo "${SPATCH_PID[$i]} running"
164 if [ "$USE_JOBS" = "yes" ]; then
172 for i in $(seq 0 $(( NPROC - 1 )) ); do
173 if [ $VERBOSE -eq 2 ] ; then
174 echo "Killing ${SPATCH_PID[$i]}"
176 kill ${SPATCH_PID[$i]} 2>/dev/null
180 # You can override heuristics with SPFLAGS, these must always go last
181 OPTIONS="$OPTIONS $SPFLAGS"
186 OPT=`grep "Options:" $COCCI | cut -d':' -f2`
187 REQ=`grep "Requires:" $COCCI | cut -d':' -f2 | sed "s| ||"`
188 if [ -n "$REQ" ] && ! { echo "$REQ"; echo "$SPATCH_VERSION"; } | sort -CV ; then
189 echo "Skipping coccinelle SmPL patch: $COCCI"
190 echo "You have coccinelle: $SPATCH_VERSION"
191 echo "This SmPL patch requires: $REQ"
195 # The option '--parse-cocci' can be used to syntactically check the SmPL files.
197 # $SPATCH -D $MODE $FLAGS -parse_cocci $COCCI $OPT > /dev/null
199 if [ $VERBOSE -ne 0 -a $ONLINE -eq 0 ] ; then
201 FILE=${COCCI#$srctree/}
203 echo "Processing `basename $COCCI`"
204 echo "with option(s) \"$OPT\""
206 echo 'Message example to submit a patch:'
208 sed -ne 's|^///||p' $COCCI
210 if [ "$MODE" = "patch" ] ; then
211 echo ' The semantic patch that makes this change is available'
212 elif [ "$MODE" = "report" ] ; then
213 echo ' The semantic patch that makes this report is available'
214 elif [ "$MODE" = "context" ] ; then
215 echo ' The semantic patch that spots this code is available'
216 elif [ "$MODE" = "org" ] ; then
217 echo ' The semantic patch that makes this Org report is available'
219 echo ' The semantic patch that makes this output is available'
223 echo ' More information about semantic patching is available at'
224 echo ' http://coccinelle.lip6.fr/'
227 if [ "`sed -ne 's|^//#||p' $COCCI`" ] ; then
228 echo 'Semantic patch information:'
229 sed -ne 's|^//#||p' $COCCI
234 if [ "$MODE" = "chain" ] ; then
235 run_cmd $SPATCH -D patch \
236 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || \
237 run_cmd $SPATCH -D report \
238 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || \
239 run_cmd $SPATCH -D context \
240 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || \
241 run_cmd $SPATCH -D org \
242 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || exit 1
243 elif [ "$MODE" = "rep+ctxt" ] ; then
244 run_cmd $SPATCH -D report \
245 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff && \
246 run_cmd $SPATCH -D context \
247 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
249 run_cmd $SPATCH -D $MODE $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
254 if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then
255 if [ -f $DEBUG_FILE ]; then
256 echo "Debug file $DEBUG_FILE exists, bailing"
260 DEBUG_FILE="/dev/null"
263 if [ "$COCCI" = "" ] ; then
264 for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do