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-rwxr-xr-xscripts/coccicheck281
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diff --git a/scripts/coccicheck b/scripts/coccicheck
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+#!/bin/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 "\-\-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 | egrep -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 $1"
+
+ # No need to parallelize Coccinelle since this mode takes one input file.
+ NPROC=1
+else
+ ONLINE=0
+ if [ "$KBUILD_EXTMOD" = "" ] ; then
+ OPTIONS="--dir $srctree $COCCIINCLUDE"
+ else
+ OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
+ fi
+
+ # Use only one thread per core by default if hyperthreading is enabled
+ THREADS_PER_CORE=$(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
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