1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# Linux kernel coccicheck 4# 5# Read Documentation/dev-tools/coccinelle.rst 6# 7# This script requires at least spatch 8# version 1.0.0-rc11. 9 10DIR="$(dirname $(readlink -f $0))/.." 11SPATCH="`which ${SPATCH:=spatch}`" 12 13if [ ! -x "$SPATCH" ]; then 14 echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/' 15 exit 1 16fi 17 18SPATCH_VERSION=$($SPATCH --version | head -1 | awk '{print $3}') 19SPATCH_VERSION_NUM=$(echo $SPATCH_VERSION | ${DIR}/scripts/ld-version.sh) 20 21USE_JOBS="no" 22$SPATCH --help | grep "\-\-jobs" > /dev/null && USE_JOBS="yes" 23 24# The verbosity may be set by the environmental parameter V= 25# as for example with 'make V=1 coccicheck' 26 27if [ -n "$V" -a "$V" != "0" ]; then 28 VERBOSE="$V" 29else 30 VERBOSE=0 31fi 32 33FLAGS="--very-quiet" 34 35# You can use SPFLAGS to append extra arguments to coccicheck or override any 36# heuristics done in this file as Coccinelle accepts the last options when 37# options conflict. 38# 39# A good example for use of SPFLAGS is if you want to debug your cocci script, 40# you can for instance use the following: 41# 42# $ export COCCI=scripts/coccinelle/misc/irqf_oneshot.cocci 43# $ make coccicheck MODE=report DEBUG_FILE="all.err" SPFLAGS="--profile --show-trying" M=./drivers/mfd/arizona-irq.c 44# 45# "--show-trying" should show you what rule is being processed as it goes to 46# stdout, you do not need a debug file for that. The profile output will be 47# be sent to stdout, if you provide a DEBUG_FILE the profiling data can be 48# inspected there. 49# 50# --profile will not output if --very-quiet is used, so avoid it. 51echo $SPFLAGS | egrep -e "--profile|--show-trying" 2>&1 > /dev/null 52if [ $? -eq 0 ]; then 53 FLAGS="--quiet" 54fi 55 56# spatch only allows include directories with the syntax "-I include" 57# while gcc also allows "-Iinclude" and "-include include" 58COCCIINCLUDE=${LINUXINCLUDE//-I/-I } 59COCCIINCLUDE=${COCCIINCLUDE// -include/ --include} 60 61if [ "$C" = "1" -o "$C" = "2" ]; then 62 ONLINE=1 63 64 # Take only the last argument, which is the C file to test 65 shift $(( $# - 1 )) 66 OPTIONS="$COCCIINCLUDE $1" 67 68 # No need to parallelize Coccinelle since this mode takes one input file. 69 NPROC=1 70else 71 ONLINE=0 72 if [ "$KBUILD_EXTMOD" = "" ] ; then 73 OPTIONS="--dir $srctree $COCCIINCLUDE" 74 else 75 OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE" 76 fi 77 78 if [ -z "$J" ]; then 79 NPROC=$(getconf _NPROCESSORS_ONLN) 80 else 81 NPROC="$J" 82 fi 83fi 84 85if [ "$KBUILD_EXTMOD" != "" ] ; then 86 OPTIONS="--patch $srctree $OPTIONS" 87fi 88 89# You can override by using SPFLAGS 90if [ "$USE_JOBS" = "no" ]; then 91 trap kill_running SIGTERM SIGINT 92 declare -a SPATCH_PID 93elif [ "$NPROC" != "1" ]; then 94 # Using 0 should work as well, refer to _SC_NPROCESSORS_ONLN use on 95 # https://github.com/rdicosmo/parmap/blob/master/setcore_stubs.c 96 OPTIONS="$OPTIONS --jobs $NPROC --chunksize 1" 97fi 98 99if [ "$MODE" = "" ] ; then 100 if [ "$ONLINE" = "0" ] ; then 101 echo 'You have not explicitly specified the mode to use. Using default "report" mode.' 102 echo 'Available modes are the following: patch, report, context, org' 103 echo 'You can specify the mode with "make coccicheck MODE=<mode>"' 104 echo 'Note however that some modes are not implemented by some semantic patches.' 105 fi 106 MODE="report" 107fi 108 109if [ "$MODE" = "chain" ] ; then 110 if [ "$ONLINE" = "0" ] ; then 111 echo 'You have selected the "chain" mode.' 112 echo 'All available modes will be tried (in that order): patch, report, context, org' 113 fi 114elif [ "$MODE" = "report" -o "$MODE" = "org" ] ; then 115 FLAGS="--no-show-diff $FLAGS" 116fi 117 118if [ "$ONLINE" = "0" ] ; then 119 echo '' 120 echo 'Please check for false positives in the output before submitting a patch.' 121 echo 'When using "patch" mode, carefully review the patch before submitting it.' 122 echo '' 123fi 124 125run_cmd_parmap() { 126 if [ $VERBOSE -ne 0 ] ; then 127 echo "Running ($NPROC in parallel): $@" 128 fi 129 if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then 130 if [ -f $DEBUG_FILE ]; then 131 echo "Debug file $DEBUG_FILE exists, bailing" 132 exit 133 fi 134 else 135 DEBUG_FILE="/dev/null" 136 fi 137 $@ 2>$DEBUG_FILE 138 if [[ $? -ne 0 ]]; then 139 echo "coccicheck failed" 140 exit $? 141 fi 142} 143 144run_cmd_old() { 145 local i 146 if [ $VERBOSE -ne 0 ] ; then 147 echo "Running ($NPROC in parallel): $@" 148 fi 149 for i in $(seq 0 $(( NPROC - 1)) ); do 150 eval "$@ --max $NPROC --index $i &" 151 SPATCH_PID[$i]=$! 152 if [ $VERBOSE -eq 2 ] ; then 153 echo "${SPATCH_PID[$i]} running" 154 fi 155 done 156 wait 157} 158 159run_cmd() { 160 if [ "$USE_JOBS" = "yes" ]; then 161 run_cmd_parmap $@ 162 else 163 run_cmd_old $@ 164 fi 165} 166 167kill_running() { 168 for i in $(seq 0 $(( NPROC - 1 )) ); do 169 if [ $VERBOSE -eq 2 ] ; then 170 echo "Killing ${SPATCH_PID[$i]}" 171 fi 172 kill ${SPATCH_PID[$i]} 2>/dev/null 173 done 174} 175 176# You can override heuristics with SPFLAGS, these must always go last 177OPTIONS="$OPTIONS $SPFLAGS" 178 179coccinelle () { 180 COCCI="$1" 181 182 OPT=`grep "Option" $COCCI | cut -d':' -f2` 183 REQ=`grep "Requires" $COCCI | cut -d':' -f2 | sed "s| ||"` 184 REQ_NUM=$(echo $REQ | ${DIR}/scripts/ld-version.sh) 185 if [ "$REQ_NUM" != "0" ] ; then 186 if [ "$SPATCH_VERSION_NUM" -lt "$REQ_NUM" ] ; then 187 echo "Skipping coccinele SmPL patch: $COCCI" 188 echo "You have coccinelle: $SPATCH_VERSION" 189 echo "This SmPL patch requires: $REQ" 190 return 191 fi 192 fi 193 194# The option '--parse-cocci' can be used to syntactically check the SmPL files. 195# 196# $SPATCH -D $MODE $FLAGS -parse_cocci $COCCI $OPT > /dev/null 197 198 if [ $VERBOSE -ne 0 -a $ONLINE -eq 0 ] ; then 199 200 FILE=`echo $COCCI | sed "s|$srctree/||"` 201 202 echo "Processing `basename $COCCI`" 203 echo "with option(s) \"$OPT\"" 204 echo '' 205 echo 'Message example to submit a patch:' 206 207 sed -ne 's|^///||p' $COCCI 208 209 if [ "$MODE" = "patch" ] ; then 210 echo ' The semantic patch that makes this change is available' 211 elif [ "$MODE" = "report" ] ; then 212 echo ' The semantic patch that makes this report is available' 213 elif [ "$MODE" = "context" ] ; then 214 echo ' The semantic patch that spots this code is available' 215 elif [ "$MODE" = "org" ] ; then 216 echo ' The semantic patch that makes this Org report is available' 217 else 218 echo ' The semantic patch that makes this output is available' 219 fi 220 echo " in $FILE." 221 echo '' 222 echo ' More information about semantic patching is available at' 223 echo ' http://coccinelle.lip6.fr/' 224 echo '' 225 226 if [ "`sed -ne 's|^//#||p' $COCCI`" ] ; then 227 echo 'Semantic patch information:' 228 sed -ne 's|^//#||p' $COCCI 229 echo '' 230 fi 231 fi 232 233 if [ "$MODE" = "chain" ] ; then 234 run_cmd $SPATCH -D patch \ 235 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || \ 236 run_cmd $SPATCH -D report \ 237 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || \ 238 run_cmd $SPATCH -D context \ 239 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || \ 240 run_cmd $SPATCH -D org \ 241 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || exit 1 242 elif [ "$MODE" = "rep+ctxt" ] ; then 243 run_cmd $SPATCH -D report \ 244 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff && \ 245 run_cmd $SPATCH -D context \ 246 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1 247 else 248 run_cmd $SPATCH -D $MODE $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1 249 fi 250 251} 252 253if [ "$COCCI" = "" ] ; then 254 for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do 255 coccinelle $f 256 done 257else 258 coccinelle $COCCI 259fi 260