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
|
#!/bin/sh
# if no argument provided, write stdin to a file and re-run the script
if [ $# = 0 ]; then
cat > patcheck.stdout
$0 patcheck.stdout
rm -f patcheck.stdout
exit
fi
GREP=grep
EGREP=egrep
TMP=patcheck.tmp
OPT="-nH"
#FILES=$($GREP '^+++' $* | sed 's/+++ //g')
echo patCHeck 1e10.0
echo This tool is intended to help a human check/review patches it is very far from
echo being free of false positives and negatives, its output are just hints of what
echo may or may not be bad. When you use it and it misses something or detects
echo something wrong, fix it and send a patch to the libav-devel mailing list.
echo License:GPL Author: Michael Niedermayer
ERE_PRITYP='(unsigned *|)(char|short|long|int|long *int|short *int|void|float|double|(u|)int(8|16|32|64)_t)'
ERE_TYPES='(const|static|av_cold|inline| *)*('$ERE_PRITYP'|[a-zA-Z][a-zA-Z0-9_]*)[* ]{1,}[a-zA-Z][a-zA-Z0-9_]*'
ERE_FUNCS="$ERE_TYPES"' *\('
hiegrep(){
arg="$1"
msg="$2"
shift 2
$GREP $OPT '^+' $* | $GREP -v ':+++'| $EGREP --color=always -- "$arg"> $TMP && printf "\n$msg\n"
cat $TMP
}
hiegrep2(){
arg="$1"
varg="$2"
msg="$3"
shift 3
$GREP $OPT '^+' $* | $GREP -v ':+++' | $EGREP -v -- "$varg" | $EGREP --color=always -- "$arg" > $TMP && printf "\n$msg\n"
cat $TMP
}
hiegrep '[[:space:]]$' 'trailing whitespace' $*
hiegrep "$(echo x | tr 'x' '\t')" 'tabs' $*
#hiegrep ':\+$' 'Empty lines' $*
hiegrep ';;' 'double ;' $*
hiegrep2 '\b_[a-zA-Z0-9_]{1,}' '__(asm|attribute)([^a-zA-Z0-9]|$)' 'reserved identifer' $*
hiegrep '//[-/<\* ]*$' 'empty comment' $*
hiegrep '/\*[-<\* ]*\*/' 'empty comment' $*
hiegrep 'for *\( *'"$ERE_PRITYP"' ' 'not gcc 2.95 compatible' $*
hiegrep '(static|inline|const) *\1' 'duplicate word' $*
hiegrep 'INIT_VLC_USE_STATIC' 'forbidden ancient vlc type' $*
hiegrep '=[-+\*\&] ' 'looks like compound assignment' $*
hiegrep2 '/\*\* *[a-zA-Z0-9].*' '\*/' 'Inconsistently formatted doxygen comment' $*
hiegrep '; */\*\*[^<]' 'Misformatted doxygen comment' $*
hiegrep '//!|/\*!' 'inconsistent doxygen syntax' $*
hiegrep2 '(int|unsigned|static|void)[a-zA-Z0-9 _]*(init|end)[a-zA-Z0-9 _]*\(.*[^;]$' '(av_cold|:\+[^a-zA-Z_])' 'These functions may need av_cold, please review the whole patch for similar functions needing av_cold' $*
hiegrep '\+= *1 *;' 'can be simplified to ++' $*
hiegrep '-= *1 *;' 'can be simplified to --' $*
hiegrep '((!|=)= *(0|NULL)[^0-9a-z]|[^0-9a-z](0|NULL) *(!|=)=)' 'x==0 / x!=0 can be simplified to !x / x' $*
$EGREP $OPT '^\+ *(const *|)static' $*| $EGREP --color=always '[^=]= *(0|NULL)[^0-9a-zA-Z]'> $TMP && printf '\nuseless 0 init\n'
cat $TMP
hiegrep '# *ifdef * (HAVE|CONFIG)_' 'ifdefs that should be #if' $*
hiegrep '\b(awnser|cant|dont|wont|usefull|successfull|occured|teh|alot|wether|skiped|heigth|informations|colums|loosy|loosing|seperate|preceed|upto|paket|posible|unkown|inpossible|dimention|acheive)\b' 'common typos' $*
hiegrep 'av_log\( *NULL' 'Missing context in av_log' $*
hiegrep '[^sn]printf' 'Please use av_log' $*
hiegrep '\bmalloc' 'Please use av_malloc' $*
hiegrep '\) *av_malloc' 'useless casts' $*
hiegrep ':\+ *'"$ERE_PRITYP"' *inline' 'non static inline or strangely ordered inline+static' $*
hiegrep "$ERE_FUNCS"' *\)' 'missing void' $*
hiegrep '(sprintf|strcat|strcpy)' 'Possible security issue, make sure this is safe or use snprintf/av_strl*' $*
hiegrep '/ *(2|4|8|16|32|64|128|256|512|1024|2048|4096|8192|16384|32768|65536)[^0-9]' 'divide by 2^x could use >> maybe' $*
hiegrep '#(el|)if *(0|1)' 'useless #if' $*
hiegrep 'if *\( *(0|1) *\)' 'useless if()' $*
hiegrep '& *[a-zA-Z0-9_]* *\[ *0 *\]' 'useless & [0]' $*
hiegrep '(\( *[0-9] *(&&|\|\|)|(&&|\|\|) *[0-9] *\))' 'overriding condition' $*
hiegrep '(:\+|,|;)( *|static|\*)*'"$ERE_PRITYP"' *\*( |\*)*(src|source|input|in[^a-z])' 'missing const?' $*
hiegrep '(:\+|,|;)( *|static|\*)*'"$ERE_PRITYP"' *(src|source|input|in)([0-9A-Z_][0-9A-Za-z_]*){1,} *\[' 'missing const (test2)?' $*
hiegrep ' *static *'"$ERE_FUNCS"'[^)]*\);' 'static prototype, maybe you should reorder your functions' $*
hiegrep '@file: *[a-zA-Z0-9_]' 'doxy filetag with filename can in the future cause problems when forgotten during a rename' $*
hiegrep '\bassert' 'Please use av_assert0, av_assert1 or av_assert2' $*
hiegrep2 '\.long_name *=' 'NULL_IF_CONFIG_SMAL' 'missing NULL_IF_CONFIG_SMAL' $*
hiegrep2 '\.pix_fmts *= *\(' 'const' 'missing const for pix_fmts array' $*
hiegrep2 '\.sample_fmts *= *\(' 'const' 'missing const for sample_fmts array' $*
hiegrep2 '\.supported_framerates *= *\(' 'const' 'missing const for supported_framerates array' $*
hiegrep2 '\.channel_layouts *= *\(' 'const' 'missing const for channel_layouts array' $*
#$EGREP $OPT '^\+.*const ' $*| $GREP -v 'static'> $TMP && printf '\nnon static const\n'
#cat $TMP
hiegrep2 "$ERE_TYPES" '(static|av_|ff_|typedef|:\+[^a-zA-Z_])' 'Non static with no ff_/av_ prefix' $*
hiegrep ':\+[^}#]*else' 'missing } prior to else' $*
hiegrep '(if|while|for)\(' 'missing whitespace between keyword and ( (feel free to ignore)' $*
hiegrep '(else|do){' 'missing whitespace between keyword and { (feel free to ignore)' $*
hiegrep '}(else|while)' 'missing whitespace between } and keyword (feel free to ignore)' $*
#FIXME this should print the previous statement maybe
hiegrep ':\+ *{ *$' '{ should be on the same line as the related previous statement' $*
rm $TMP
for i in $($GREP -H '^+.*@param' $*| sed 's/^\([^:]*\):.*@param\(\[.*\]\|\) *\([a-zA-Z0-9_]*\) .*$/\1:\3/') ; do
doxpar=$(echo $i | sed 's/^.*:\(.*\)$/\1/')
file=$(echo $i | sed 's/^\([^:]*\):.*$/\1/')
$GREP " *$doxpar *[),]" $file | $GREP -v '@param' >/dev/null || $GREP --color=always "@param *$doxpar" $file >>$TMP
done
if test -e $TMP ; then
printf '\nmismatching doxy params\n'
cat $TMP
fi
$EGREP -B2 $OPT '^(\+|) *('"$ERE_TYPES"'|# *define)' $* | $EGREP -A2 --color=always '(:|-)\+[^/]*/(\*([^*]|$)|/([^/]|$))' > $TMP && printf "\n Non doxy comments\n"
cat $TMP
rm $TMP
for i in \
$($EGREP -H '^\+ *'"$ERE_TYPES" $* |\
$GREP -v '(' | $EGREP -v '\Wgoto\W' |\
xargs -d '\n' -n 1 |\
$GREP -o '[* ][* ]*[a-zA-Z][0-9a-zA-Z_]* *[,;=]' |\
sed 's/.[* ]*\([a-zA-Z][0-9a-zA-Z_]*\) *[,;=]/\1/') \
; do
echo $i | $GREP '^NULL$' && continue
$EGREP $i' *(\+|-|\*|/|\||&|%|)=[^=]' $* >/dev/null || echo "possibly never written:"$i >> $TMP
$EGREP '(=|\(|return).*'$i'(==|[^=])*$' $* >/dev/null || echo "possibly never read :"$i >> $TMP
$EGREP -o $i' *((\+|-|\*|/|\||&|%|)=[^=]|\+\+|--) *(0x|)[0-9]*(;|)' $* |\
$EGREP -v $i' *= *(0x|)[0-9]{1,};'>/dev/null || echo "possibly constant :"$i >> $TMP
done
if test -e $TMP ; then
printf '\npossibly unused variables\n'
cat $TMP
fi
$GREP '^+++ .*Changelog' $* >/dev/null || printf "\nMissing changelog entry (ignore if minor change)\n"
cat $* | tr '\n' '@' | $EGREP --color=always -o '(fprintf|av_log|printf)\([^)]*\)[+ ;@]*\1' >$TMP && printf "\nMergeable calls\n"
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | $EGREP --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *[<>]=? *[0-9]* *\) * \1 *= *[0-9]* *;[ @\\+]*else *if *\( *\1 *[<>]=? *[0-9]* *\) *\1 *= *[0-9]* *;' >$TMP && printf "\nav_clip / av_clip_uint8 / av_clip_int16 / ...\n"
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | $EGREP --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *[<>]=? *([A-Za-z0-9_]*) *\)[ @\\+]*(\1|\2) *= *(\1|\2) *;' >$TMP && printf "\nFFMIN/FFMAX\n"
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | $EGREP --color=always -o '\+ *if *\( *([A-Za-z0-9_]*) *\)[ @\\+]*av_free(p|) *\( *(&|) *\1[^-.]' >$TMP && printf "\nav_free(NULL) is safe\n"
cat $TMP | tr '@' '\n'
cat $* | tr '\n' '@' | $EGREP --color=always -o '[^a-zA-Z0-9_]([a-zA-Z0-9_]*) *= *av_malloc *\([^)]*\)[ @;\\+]*memset *\( *\1' >$TMP && printf "\nav_mallocz()\n"
cat $TMP | tr '@' '\n'
# does not work
#cat $* | tr '\n' '@' | $EGREP -o '[^a-zA-Z_0-9]([a-zA-Z][a-zA-Z_0-9]*) *=[^=].*\1' | $EGREP -o '[^a-zA-Z_0-9]([a-zA-Z][a-zA-Z_0-9]*) *=[^=].*\1 *=[^=]' >$TMP && printf "\nPossibly written 2x before read\n"
#cat $TMP | tr '@' '\n'
exit
TODO/idea list:
for all demuxers & muxers
$EGREP for "avctx->priv_data"
vertical align =
/* and * align
arrays fitting in smaller types
variables written to twice with no interspaced read
memset(block, 0, 6*64*sizeof(DCTELEM)); -> clear_blocks
check existence of long_name in AVCodec
check that the patch does not touch codec & (de)muxer layer at the same time ->split
write a regression test containing at least a line that triggers each warning once
|
