summaryrefslogtreecommitdiffstats
path: root/scripts/coccicheck
blob: e04d328210ac2bd55c946230f2c8f3a9fc2ba38d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
#!/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 $3}')
SPATCH_VERSION_NUM=$(echo $SPATCH_VERSION | ${DIR}/scripts/ld-version.sh)

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

    # 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

    if [ -z "$J" ]; then
        NPROC=$(getconf _NPROCESSORS_ONLN)
    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'
	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
	echo $@ >>$DEBUG_FILE
	$@ 2>>$DEBUG_FILE
	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:" $COCCI | cut -d':' -f2 | sed "s| ||"`
    REQ_NUM=$(echo $REQ | ${DIR}/scripts/ld-version.sh)
    if [ "$REQ_NUM" != "0" ] ; then
	    if [ "$SPATCH_VERSION_NUM" -lt "$REQ_NUM" ] ; then
		    echo "Skipping coccinelle SmPL patch: $COCCI"
		    echo "You have coccinelle:           $SPATCH_VERSION"
		    echo "This SmPL patch requires:      $REQ"
		    return
	    fi
    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