xref: /openbmc/u-boot/scripts/coccicheck (revision baefb63a) 
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3# Linux kernel coccicheck
4#
5# Read doc/README.coccinelle
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="$V"
29else
30	VERBOSE=0
31fi
32
33if [ -z "$J" ]; then
34	NPROC=$(getconf _NPROCESSORS_ONLN)
35else
36	NPROC="$J"
37fi
38
39FLAGS="--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.
57echo $SPFLAGS | egrep -e "--profile|--show-trying" 2>&1 > /dev/null
58if [ $? -eq 0 ]; then
59	FLAGS="--quiet"
60fi
61
62# spatch only allows include directories with the syntax "-I include"
63# while gcc also allows "-Iinclude" and "-include include"
64COCCIINCLUDE=${LINUXINCLUDE//-I/-I }
65COCCIINCLUDE=${COCCIINCLUDE// -include/ --include}
66
67if [ "$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 $1"
73else
74    ONLINE=0
75    if [ "$KBUILD_EXTMOD" = "" ] ; then
76        OPTIONS="--dir $srctree $COCCIINCLUDE"
77    else
78        OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
79    fi
80fi
81
82if [ "$KBUILD_EXTMOD" != "" ] ; then
83    OPTIONS="--patch $srctree $OPTIONS"
84fi
85
86# You can override by using SPFLAGS
87if [ "$USE_JOBS" = "no" ]; then
88	trap kill_running SIGTERM SIGINT
89	declare -a SPATCH_PID
90elif [ "$NPROC" != "1" ]; then
91	# Using 0 should work as well, refer to _SC_NPROCESSORS_ONLN use on
92	# https://github.com/rdicosmo/parmap/blob/master/setcore_stubs.c
93	OPTIONS="$OPTIONS --jobs $NPROC --chunksize 1"
94fi
95
96if [ "$MODE" = "" ] ; then
97    if [ "$ONLINE" = "0" ] ; then
98	echo 'You have not explicitly specified the mode to use. Using default "report" mode.'
99	echo 'Available modes are the following: patch, report, context, org'
100	echo 'You can specify the mode with "make coccicheck MODE=<mode>"'
101	echo 'Note however that some modes are not implemented by some semantic patches.'
102    fi
103    MODE="report"
104fi
105
106if [ "$MODE" = "chain" ] ; then
107    if [ "$ONLINE" = "0" ] ; then
108	echo 'You have selected the "chain" mode.'
109	echo 'All available modes will be tried (in that order): patch, report, context, org'
110    fi
111elif [ "$MODE" = "report" -o "$MODE" = "org" ] ; then
112    FLAGS="--no-show-diff $FLAGS"
113fi
114
115if [ "$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 ''
120fi
121
122run_cmd_parmap() {
123	if [ $VERBOSE -ne 0 ] ; then
124		echo "Running ($NPROC in parallel): $@"
125	fi
126	if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then
127		if [ -f $DEBUG_FILE ]; then
128			echo "Debug file $DEBUG_FILE exists, bailing"
129			exit
130		fi
131	else
132		DEBUG_FILE="/dev/null"
133	fi
134	$@ 2>$DEBUG_FILE
135	if [[ $? -ne 0 ]]; then
136		echo "coccicheck failed"
137		exit $?
138	fi
139}
140
141run_cmd_old() {
142	local i
143	if [ $VERBOSE -ne 0 ] ; then
144		echo "Running ($NPROC in parallel): $@"
145	fi
146	for i in $(seq 0 $(( NPROC - 1)) ); do
147		eval "$@ --max $NPROC --index $i &"
148		SPATCH_PID[$i]=$!
149		if [ $VERBOSE -eq 2 ] ; then
150			echo "${SPATCH_PID[$i]} running"
151		fi
152	done
153	wait
154}
155
156run_cmd() {
157	if [ "$USE_JOBS" = "yes" ]; then
158		run_cmd_parmap $@
159	else
160		run_cmd_old $@
161	fi
162}
163
164kill_running() {
165	for i in $(seq 0 $(( NPROC - 1 )) ); do
166		if [ $VERBOSE -eq 2 ] ; then
167			echo "Killing ${SPATCH_PID[$i]}"
168		fi
169		kill ${SPATCH_PID[$i]} 2>/dev/null
170	done
171}
172
173# You can override heuristics with SPFLAGS, these must always go last
174OPTIONS="$OPTIONS $SPFLAGS"
175
176coccinelle () {
177    COCCI="$1"
178
179    OPT=`grep "Option" $COCCI | cut -d':' -f2`
180    REQ=`grep "Requires" $COCCI | cut -d':' -f2 | sed "s| ||"`
181    REQ_NUM=$(echo $REQ | ${DIR}/scripts/ld-version.sh)
182    if [ "$REQ_NUM" != "0" ] ; then
183	    if [ "$SPATCH_VERSION_NUM" -lt "$REQ_NUM" ] ; then
184		    echo "Skipping coccinele SmPL patch: $COCCI"
185		    echo "You have coccinelle:           $SPATCH_VERSION"
186		    echo "This SmPL patch requires:      $REQ"
187		    return
188	    fi
189    fi
190
191#   The option '--parse-cocci' can be used to syntactically check the SmPL files.
192#
193#    $SPATCH -D $MODE $FLAGS -parse_cocci $COCCI $OPT > /dev/null
194
195    if [ $VERBOSE -ne 0 -a $ONLINE -eq 0 ] ; then
196
197	FILE=`echo $COCCI | sed "s|$srctree/||"`
198
199	echo "Processing `basename $COCCI`"
200	echo "with option(s) \"$OPT\""
201	echo ''
202	echo 'Message example to submit a patch:'
203
204	sed -ne 's|^///||p' $COCCI
205
206	if [ "$MODE" = "patch" ] ; then
207	    echo ' The semantic patch that makes this change is available'
208	elif [ "$MODE" = "report" ] ; then
209	    echo ' The semantic patch that makes this report is available'
210	elif [ "$MODE" = "context" ] ; then
211	    echo ' The semantic patch that spots this code is available'
212	elif [ "$MODE" = "org" ] ; then
213	    echo ' The semantic patch that makes this Org report is available'
214	else
215	    echo ' The semantic patch that makes this output is available'
216	fi
217	echo " in $FILE."
218	echo ''
219	echo ' More information about semantic patching is available at'
220	echo ' http://coccinelle.lip6.fr/'
221	echo ''
222
223	if [ "`sed -ne 's|^//#||p' $COCCI`" ] ; then
224	    echo 'Semantic patch information:'
225	    sed -ne 's|^//#||p' $COCCI
226	    echo ''
227	fi
228    fi
229
230    if [ "$MODE" = "chain" ] ; then
231	run_cmd $SPATCH -D patch   \
232		$FLAGS --cocci-file $COCCI $OPT $OPTIONS               || \
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               || \
237	run_cmd $SPATCH -D org     \
238		$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || exit 1
239    elif [ "$MODE" = "rep+ctxt" ] ; then
240	run_cmd $SPATCH -D report  \
241		$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff && \
242	run_cmd $SPATCH -D context \
243		$FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
244    else
245	run_cmd $SPATCH -D $MODE   $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
246    fi
247
248}
249
250if [ "$COCCI" = "" ] ; then
251    for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do
252	coccinelle $f
253    done
254else
255    coccinelle $COCCI
256fi
257