scripts/coccicheck

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