scripts/coccicheck

   1 #!/bin/bash
   2
   3 #
   4 # This script requires at least spatch
   5 # version 1.0.0-rc11.
   6 #
   7
   8 SPATCH="`which ${SPATCH:=spatch}`"
   9
  10 trap kill_running SIGTERM SIGINT
  11 declare -a SPATCH_PID
  12
  13 # The verbosity may be set by the environmental parameter V=
  14 # as for example with 'make V=1 coccicheck'
  15
  16 if [ -n "$V" -a "$V" != "0" ]; then
  17         VERBOSE="$V"
  18 else
  19         VERBOSE=0
  20 fi
  21
  22 if [ -z "$J" ]; then
  23         NPROC=$(getconf _NPROCESSORS_ONLN)
  24 else
  25         NPROC="$J"
  26 fi
  27
  28 FLAGS="$SPFLAGS --very-quiet"
  29
  30 # spatch only allows include directories with the syntax "-I include"
  31 # while gcc also allows "-Iinclude" and "-include include"
  32 COCCIINCLUDE=${LINUXINCLUDE//-I/-I }
  33 COCCIINCLUDE=${COCCIINCLUDE// -include/ --include}
  34
  35 if [ "$C" = "1" -o "$C" = "2" ]; then
  36     ONLINE=1
  37
  38     # Take only the last argument, which is the C file to test
  39     shift $(( $# - 1 ))
  40     OPTIONS="$COCCIINCLUDE $1"
  41 else
  42     ONLINE=0
  43     if [ "$KBUILD_EXTMOD" = "" ] ; then
  44         OPTIONS="--dir $srctree $COCCIINCLUDE"
  45     else
  46         OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
  47     fi
  48 fi
  49
  50 if [ "$KBUILD_EXTMOD" != "" ] ; then
  51     OPTIONS="--patch $srctree $OPTIONS"
  52 fi
  53
  54 if [ ! -x "$SPATCH" ]; then
  55     echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
  56     exit 1
  57 fi
  58
  59 if [ "$MODE" = "" ] ; then
  60     if [ "$ONLINE" = "0" ] ; then
  61         echo 'You have not explicitly specified the mode to use. Using default "report" mode.'
  62         echo 'Available modes are the following: patch, report, context, org'
  63         echo 'You can specify the mode with "make coccicheck MODE=<mode>"'
  64         echo 'Note however that some modes are not implemented by some semantic patches.'
  65     fi
  66     MODE="report"
  67 fi
  68
  69 if [ "$MODE" = "chain" ] ; then
  70     if [ "$ONLINE" = "0" ] ; then
  71         echo 'You have selected the "chain" mode.'
  72         echo 'All available modes will be tried (in that order): patch, report, context, org'
  73     fi
  74 elif [ "$MODE" = "report" -o "$MODE" = "org" ] ; then
  75     FLAGS="$FLAGS --no-show-diff"
  76 fi
  77
  78 if [ "$ONLINE" = "0" ] ; then
  79     echo ''
  80     echo 'Please check for false positives in the output before submitting a patch.'
  81     echo 'When using "patch" mode, carefully review the patch before submitting it.'
  82     echo ''
  83 fi
  84
  85 run_cmd() {
  86         local i
  87         if [ $VERBOSE -ne 0 ] ; then
  88                 echo "Running ($NPROC in parallel): $@"
  89         fi
  90         for i in $(seq 0 $(( NPROC - 1)) ); do
  91                 eval "$@ --max $NPROC --index $i &"
  92                 SPATCH_PID[$i]=$!
  93                 if [ $VERBOSE -eq 2 ] ; then
  94                         echo "${SPATCH_PID[$i]} running"
  95                 fi
  96         done
  97         wait
  98 }
  99
 100 kill_running() {
 101         for i in $(seq 0 $(( NPROC - 1 )) ); do
 102                 if [ $VERBOSE -eq 2 ] ; then
 103                         echo "Killing ${SPATCH_PID[$i]}"
 104                 fi
 105                 kill ${SPATCH_PID[$i]} 2>/dev/null
 106         done
 107 }
 108
 109 coccinelle () {
 110     COCCI="$1"
 111
 112     OPT=`grep "Option" $COCCI | cut -d':' -f2`
 113
 114 #   The option '--parse-cocci' can be used to syntactically check the SmPL files.
 115 #
 116 #    $SPATCH -D $MODE $FLAGS -parse_cocci $COCCI $OPT > /dev/null
 117
 118     if [ $VERBOSE -ne 0 -a $ONLINE -eq 0 ] ; then
 119
 120         FILE=`echo $COCCI | sed "s|$srctree/||"`
 121
 122         echo "Processing `basename $COCCI`"
 123         echo "with option(s) \"$OPT\""
 124         echo ''
 125         echo 'Message example to submit a patch:'
 126
 127         sed -ne 's|^///||p' $COCCI
 128
 129         if [ "$MODE" = "patch" ] ; then
 130             echo ' The semantic patch that makes this change is available'
 131         elif [ "$MODE" = "report" ] ; then
 132             echo ' The semantic patch that makes this report is available'
 133         elif [ "$MODE" = "context" ] ; then
 134             echo ' The semantic patch that spots this code is available'
 135         elif [ "$MODE" = "org" ] ; then
 136             echo ' The semantic patch that makes this Org report is available'
 137         else
 138             echo ' The semantic patch that makes this output is available'
 139         fi
 140         echo " in $FILE."
 141         echo ''
 142         echo ' More information about semantic patching is available at'
 143         echo ' http://coccinelle.lip6.fr/'
 144         echo ''
 145
 146         if [ "`sed -ne 's|^//#||p' $COCCI`" ] ; then
 147             echo 'Semantic patch information:'
 148             sed -ne 's|^//#||p' $COCCI
 149             echo ''
 150         fi
 151     fi
 152
 153     if [ "$MODE" = "chain" ] ; then
 154         run_cmd $SPATCH -D patch   \
 155                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS               || \
 156         run_cmd $SPATCH -D report  \
 157                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || \
 158         run_cmd $SPATCH -D context \
 159                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS               || \
 160         run_cmd $SPATCH -D org     \
 161                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || exit 1
 162     elif [ "$MODE" = "rep+ctxt" ] ; then
 163         run_cmd $SPATCH -D report  \
 164                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff && \
 165         run_cmd $SPATCH -D context \
 166                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
 167     else
 168         run_cmd $SPATCH -D $MODE   $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
 169     fi
 170
 171 }
 172
 173 if [ "$COCCI" = "" ] ; then
 174     for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do
 175         coccinelle $f
 176     done
 177 else
 178     coccinelle $COCCI
 179 fi