my $P = $0;
$P =~ s@.*/@@g;
-my $V = '0.08';
+my $V = '0.10';
use Getopt::Long qw(:config no_auto_abbrev);
return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
}
+sub ctx_statement_level {
+ my ($linenr, $remain, $off) = @_;
+
+ return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
+}
sub ctx_locate_comment {
my ($first_line, $end_line) = @_;
return ($cmt ne '');
}
+sub ctx_expr_before {
+ my ($line) = @_;
+
+ ##print "CHECK<$line>\n";
+
+ my $pos = length($line) - 1;
+ my $count = 0;
+ my $c;
+
+ for (; $pos >= 0; $pos--) {
+ $c = substr($line, $pos, 1);
+ ##print "CHECK: c<$c> count<$count>\n";
+ if ($c eq ')') {
+ $count++;
+ } elsif ($c eq '(') {
+ last if (--$count == 0);
+ }
+ }
+
+ ##print "CHECK: result<" . substr($line, 0, $pos) . ">\n";
+
+ return substr($line, 0, $pos);
+}
+
sub cat_vet {
my ($vet) = @_;
+ my ($res, $coded);
- $vet =~ s/\t/^I/;
- $vet =~ s/$/\$/;
+ $res = '';
+ while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]])/g) {
+ $coded = sprintf("^%c", unpack('C', $2) + 64);
+ $res .= $1 . $coded;
+ }
+ $res =~ s/$/\$/;
- return $vet;
+ return $res;
}
my @report = ();
my $first_line = 0;
my $Ident = qr{[A-Za-z\d_]+};
- my $Storage = qr{extern|static};
- my $Sparse = qr{__user|__kernel|__force|__iomem};
+ my $Storage = qr{extern|static|asmlinkage};
+ my $Sparse = qr{
+ __user|
+ __kernel|
+ __force|
+ __iomem|
+ __must_check|
+ __init_refok|
+ fastcall
+ }x;
+ my $Inline = qr{inline|__always_inline|noinline};
my $NonptrType = qr{
\b
(?:const\s+)?
unsigned|
float|
double|
+ bool|
long\s+int|
long\s+long|
long\s+long\s+int|
}x;
my $Type = qr{
\b$NonptrType\b
- (?:\s*\*+\s*const|\s*\*+)?
+ (?:\s*\*+\s*const|\s*\*+|(?:\s*\[\s*\])+)?
+ (?:\s+$Sparse)*
}x;
my $Declare = qr{(?:$Storage\s+)?$Type};
- my $Attribute = qr{const|__read_mostly|__init|__initdata|__meminit};
-
+ my $Attribute = qr{
+ const|
+ __read_mostly|
+ __(?:mem|cpu|dev|)(?:initdata|init)
+ }x;
my $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
my $Lval = qr{$Ident(?:$Member)*};
+ # Possible bare types.
+ my @bare = ();
+ my $Bare = $NonptrType;
+
# Pre-scan the patch looking for any __setup documentation.
my @setup_docs = ();
my $setup_docs = 0;
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
#trailing whitespace
- if ($line =~ /^\+.*\S\s+$/ || $line =~ /^\+\s+$/) {
+ if ($line =~ /^\+.*\015/) {
+ my $herevet = "$here\n" . cat_vet($line) . "\n";
+ ERROR("DOS line endings\n" . $herevet);
+
+ } elsif ($line =~ /^\+.*\S\s+$/ || $line =~ /^\+\s+$/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("trailing whitespace\n" . $herevet);
}
ERROR("use tabs not spaces\n" . $herevet);
}
- #
- # The rest of our checks refer specifically to C style
- # only apply those _outside_ comments.
- #
- next if ($in_comment);
-
# Remove comments from the line before processing.
- $line =~ s@/\*.*\*/@@g;
- $line =~ s@/\*.*@@;
- $line =~ s@.*\*/@@;
+ my $comment_edge = ($line =~ s@/\*.*\*/@@g) +
+ ($line =~ s@/\*.*@@) +
+ ($line =~ s@^(.).*\*/@$1@);
+
+# The rest of our checks refer specifically to C style
+# only apply those _outside_ comments. Only skip
+# lines in the middle of comments.
+ next if (!$comment_edge && $in_comment);
# Standardise the strings and chars within the input to simplify matching.
$line = sanitise_line($line);
+# Check for potential 'bare' types
+ if ($realcnt &&
+ $line !~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?$Type\b/ &&
+ $line !~ /$Ident:\s*$/ &&
+ $line !~ /^.\s*$Ident\s*\(/ &&
+ ($line =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?($Ident)\b/ ||
+ $line =~ /^.\s*(?:$Storage\s+)?($Ident)\b\s*\**\s*$Ident\s*(?:;|=)/)) {
+ my $possible = $1;
+ if ($possible !~ /^(?:$Storage|$Type|DEFINE_\S+)$/ &&
+ $possible ne 'goto' && $possible ne 'return' &&
+ $possible ne 'struct' && $possible ne 'enum' &&
+ $possible ne 'case' && $possible ne 'else' &&
+ $possible ne 'typedef') {
+ #print "POSSIBLE<$possible>\n";
+ push(@bare, $possible);
+ my $bare = join("|", @bare);
+ $Bare = qr{
+ \b(?:$bare)\b
+ (?:\s*\*+\s*const|\s*\*+|(?:\s*\[\s*\])+)?
+ (?:\s+$Sparse)*
+ }x;
+ }
+ }
+
#
# Checks which may be anchored in the context.
#
}
}
if ($err ne '') {
- ERROR("switch and case should be at the same indent\n$hereline\n$err\n");
+ ERROR("switch and case should be at the same indent\n$hereline$err");
}
}
# if/while/etc brace do not go on next line, unless defining a do while loop,
# or if that brace on the next line is for something else
if ($line =~ /\b(?:(if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.#/) {
- my @ctx = ctx_statement($linenr, $realcnt, 0);
+ my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
my $ctx_ln = $linenr + $#ctx + 1;
my $ctx_cnt = $realcnt - $#ctx - 1;
my $ctx = join("\n", @ctx);
+ # Skip over any removed lines in the context following statement.
while ($ctx_cnt > 0 && $lines[$ctx_ln - 1] =~ /^-/) {
$ctx_ln++;
$ctx_cnt--;
ERROR("That open brace { should be on the previous line\n" .
"$here\n$ctx\n$lines[$ctx_ln - 1]");
}
+ if ($level == 0 && $ctx =~ /\)\s*\;\s*$/ && defined $lines[$ctx_ln - 1]) {
+ my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
+ if ($nindent > $indent) {
+ WARN("Trailing semicolon indicates no statements, indent implies otherwise\n" .
+ "$here\n$ctx\n$lines[$ctx_ln - 1]");
+ }
+ }
}
#ignore lines not being added
if (($prevline !~ /^}/) &&
($prevline !~ /^\+}/) &&
($prevline !~ /^ }/) &&
- ($prevline !~ /\s$name(?:\s+$Attribute)?\s*(?:;|=)/)) {
+ ($prevline !~ /\b\Q$name\E(?:\s+$Attribute)?\s*(?:;|=)/)) {
WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
}
}
# check for new typedefs, only function parameters and sparse annotations
# make sense.
if ($line =~ /\btypedef\s/ &&
- $line !~ /\btypedef\s+$Type\s+\(\s*\*$Ident\s*\)\s*\(/ &&
+ $line !~ /\btypedef\s+$Type\s+\(\s*\*?$Ident\s*\)\s*\(/ &&
$line !~ /\b__bitwise(?:__|)\b/) {
WARN("do not add new typedefs\n" . $herecurr);
}
ERROR("\"(foo $1 )\" should be \"(foo $1)\"\n" .
$herecurr);
- } elsif ($line =~ m{$NonptrType(\*+)(?:\s+$Attribute)?\s+[A-Za-z\d_]+}) {
+ } elsif ($line =~ m{$NonptrType(\*+)(?:\s+(?:$Attribute|$Sparse))?\s+[A-Za-z\d_]+}) {
ERROR("\"foo$1 bar\" should be \"foo $1bar\"\n" .
$herecurr);
- } elsif ($line =~ m{$NonptrType\s+(\*+)(?!\s+$Attribute)\s+[A-Za-z\d_]+}) {
+ } elsif ($line =~ m{$NonptrType\s+(\*+)(?!\s+(?:$Attribute|$Sparse))\s+[A-Za-z\d_]+}) {
ERROR("\"foo $1 bar\" should be \"foo $1bar\"\n" .
$herecurr);
}
# check for spaces between functions and their parentheses.
if ($line =~ /($Ident)\s+\(/ &&
- $1 !~ /^(?:if|for|while|switch|return|volatile)$/ &&
+ $1 !~ /^(?:if|for|while|switch|return|volatile|__volatile__|__attribute__|format|__extension__|Copyright)$/ &&
$line !~ /$Type\s+\(/ && $line !~ /^.\#\s*define\b/) {
- ERROR("no space between function name and open parenthesis '('\n" . $herecurr);
+ WARN("no space between function name and open parenthesis '('\n" . $herecurr);
}
# Check operator spacing.
# Note we expand the line with the leading + as the real
$opline = expand_tabs($opline);
$opline =~ s/^./ /;
if (!($line=~/\#\s*include/)) {
- my @elements = split(/(<<=|>>=|<=|>=|==|!=|\+=|-=|\*=|\/=|%=|\^=|\|=|&=|=>|->|<<|>>|<|>|=|!|~|&&|\|\||,|\^|\+\+|--|;|&|\||\+|-|\*|\/\/|\/)/, $opline);
+ my $ops = qr{
+ <<=|>>=|<=|>=|==|!=|
+ \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
+ =>|->|<<|>>|<|>|=|!|~|
+ &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/
+ }x;
+ my @elements = split(/($ops|;)/, $opline);
my $off = 0;
for (my $n = 0; $n < $#elements; $n += 2) {
$off += length($elements[$n]);
$c = 'W' if ($elements[$n + 2] =~ /^\s/);
$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
$c = 'O' if ($elements[$n + 2] eq '');
+ $c = 'E' if ($elements[$n + 2] =~ /\s*\\$/);
} else {
$c = 'E';
}
my $ptr = (" " x $off) . "^";
my $hereptr = "$hereline$ptr\n";
- ##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\n";
+ # Classify operators into binary, unary, or
+ # definitions (* only) where they have more
+ # than one mode.
+ my $unary_ctx = $prevline . $ca;
+ $unary_ctx =~ s/^./ /;
+ my $is_unary = 0;
+ my $Unary = qr{
+ (?:
+ ^|;|,|$ops|\(|\?|:|
+ \(\s*$Type\s*\)|
+ $Type|
+ return|case|else|
+ \{|\}|
+ \[|
+ ^.\#\s*define\s+$Ident\s*(?:\([^\)]*\))?|
+ ^.\#\s*else|
+ ^.\#\s*endif|
+ ^.\#\s*(?:if|ifndef|ifdef)\b.*
+ )\s*(?:|\\)\s*$
+ }x;
+ my $UnaryFalse = qr{
+ sizeof\s*\(\s*$Type\s*\)\s*$
+ }x;
+ my $UnaryDefine = qr{
+ (?:$Type|$Bare)\s*|
+ (?:$Type|$Bare).*,\s*\**
+ }x;
+ if ($op eq '-' || $op eq '&' || $op eq '*') {
+ # An operator is binary if the left hand
+ # side is a value. Pick out the known
+ # non-values.
+ if ($unary_ctx =~ /$Unary$/s &&
+ $unary_ctx !~ /$UnaryFalse$/s) {
+ $is_unary = 1;
+
+ # Special handling for ')' check if this
+ # brace represents a conditional, if so
+ # we are unary.
+ } elsif ($unary_ctx =~ /\)\s*$/) {
+ my $before = ctx_expr_before($unary_ctx);
+ if ($before =~ /(?:for|if|while)\s*$/) {
+ $is_unary = 1;
+ }
+ }
+
+ # Check for type definition for of '*'.
+ if ($op eq '*' && $unary_ctx =~ /$UnaryDefine$/) {
+ $is_unary = 2;
+ }
+ }
+
+ #if ($op eq '-' || $op eq '&' || $op eq '*') {
+ # print "UNARY: <$is_unary $a:$op:$c> <$ca:$op:$cc> <$unary_ctx>\n";
+ #}
# ; should have either the end of line or a space or \ after it
if ($op eq ';') {
ERROR("need space after that '$op' $at\n" . $hereptr);
}
- # unary ! and unary ~ are allowed no space on the right
- } elsif ($op eq '!' or $op eq '~') {
- if ($ctx !~ /[WOEB]x./) {
+ # '*' as part of a type definition -- reported already.
+ } elsif ($op eq '*' && $is_unary == 2) {
+ #warn "'*' is part of type\n";
+
+ # unary operators should have a space before and
+ # none after. May be left adjacent to another
+ # unary operator, or a cast
+ } elsif ($op eq '!' || $op eq '~' ||
+ ($is_unary && ($op eq '*' || $op eq '-' || $op eq '&'))) {
+ if ($ctx !~ /[WEB]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
ERROR("need space before that '$op' $at\n" . $hereptr);
}
if ($ctx =~ /.xW/) {
ERROR("no space before that '$op' $at\n" . $hereptr);
}
- # & is both unary and binary
- # unary:
- # a &b
- # binary (consistent spacing):
- # a&b OK
- # a & b OK
- #
- # boiling down to: if there is a space on the right then there
- # should be one on the left.
- #
- # - is the same
- #
- } elsif ($op eq '&' or $op eq '-') {
- if ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]/) {
- ERROR("need space before that '$op' $at\n" . $hereptr);
- }
-
- # * is the same as & only adding:
- # type:
- # (foo *)
- # (foo **)
- #
- } elsif ($op eq '*') {
- if ($ca !~ /$Type$/ && $cb !~ /(\*$;|$;\*)/ &&
- $ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]|OxV|WxB|BxB/) {
- ERROR("need space before that '$op' $at\n" . $hereptr);
- }
-
# << and >> may either have or not have spaces both sides
- } elsif ($op eq '<<' or $op eq '>>' or $op eq '+' or $op eq '/' or
- $op eq '^' or $op eq '|')
+ } elsif ($op eq '<<' or $op eq '>>' or
+ $op eq '&' or $op eq '^' or $op eq '|' or
+ $op eq '+' or $op eq '-' or
+ $op eq '*' or $op eq '/')
{
- if ($ctx !~ /VxV|WxW|VxE|WxE/) {
+ if ($ctx !~ /VxV|WxW|VxE|WxE|VxO/) {
ERROR("need consistent spacing around '$op' $at\n" .
$hereptr);
}
# All the others need spaces both sides.
} elsif ($ctx !~ /[EW]x[WE]/) {
- ERROR("need spaces around that '$op' $at\n" . $hereptr);
+ # Ignore email addresses <foo@bar>
+ if (!($op eq '<' && $cb =~ /$;\S+\@\S+>/) &&
+ !($op eq '>' && $cb =~ /<\S+\@\S+$;/)) {
+ ERROR("need spaces around that '$op' $at\n" . $hereptr);
+ }
}
$off += length($elements[$n + 1]);
}
WARN("multiple assignments should be avoided\n" . $herecurr);
}
-# check for multiple declarations, allowing for a function declaration
-# continuation.
- if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
- $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
- WARN("declaring multiple variables together should be avoided\n" . $herecurr);
- }
+## # check for multiple declarations, allowing for a function declaration
+## # continuation.
+## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
+## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
+##
+## # Remove any bracketed sections to ensure we do not
+## # falsly report the parameters of functions.
+## my $ln = $line;
+## while ($ln =~ s/\([^\(\)]*\)//g) {
+## }
+## if ($ln =~ /,/) {
+## WARN("declaring multiple variables together should be avoided\n" . $herecurr);
+## }
+## }
#need space before brace following if, while, etc
- if ($line =~ /\(.*\){/ || $line =~ /do{/) {
+ if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
+ $line =~ /do{/) {
ERROR("need a space before the open brace '{'\n" . $herecurr);
}
ERROR("need a space after that close brace '}'\n" . $herecurr);
}
+# check spacing on square brackets
+ if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
+ ERROR("no space after that open square bracket '['\n" . $herecurr);
+ }
+ if ($line =~ /\s\]/) {
+ ERROR("no space before that close square bracket ']'\n" . $herecurr);
+ }
+
+# check spacing on paretheses
+ if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
+ $line !~ /for\s*\(\s+;/) {
+ ERROR("no space after that open parenthesis '('\n" . $herecurr);
+ }
+ if ($line =~ /\s\)/ && $line !~ /^.\s*\)/ &&
+ $line !~ /for\s*\(.*;\s+\)/) {
+ ERROR("no space before that close parenthesis ')'\n" . $herecurr);
+ }
+
#goto labels aren't indented, allow a single space however
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
!($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
# multi-statement macros should be enclosed in a do while loop, grab the
# first statement and ensure its the whole macro if its not enclosed
# in a known goot container
- if (($prevline=~/\#define.*\\/) and
- !($prevline=~/do\s+{/) and !($prevline=~/\(\{/) and
- !($line=~/do.*{/) and !($line=~/\(\{/) and
- !($line=~/^.\s*$Declare\s/)) {
+ if ($prevline =~ /\#define.*\\/ &&
+ $prevline !~/(?:do\s+{|\(\{|\{)/ &&
+ $line !~ /(?:do\s+{|\(\{|\{)/ &&
+ $line !~ /^.\s*$Declare\s/) {
# Grab the first statement, if that is the entire macro
# its ok. This may start either on the #define line
# or the one below.
# grabbing the statement after the identifier
$prevline =~ m{^(.#\s*define\s*$Ident(?:\([^\)]*\))?\s*)(.*)\\\s*$};
##print "1<$1> 2<$2>\n";
- if ($2 ne '') {
+ if (defined $2 && $2 ne '') {
$off = length($1);
$ln--;
$cnt++;
my ($lvl, @block) = ctx_block_level($nr, $cnt);
my $stmt = join(' ', @block);
- $stmt =~ s/^[^{]*{//;
- $stmt =~ s/}[^}]*$//;
+ $stmt =~ s/(^[^{]*){//;
+ my $before = $1;
+ $stmt =~ s/}([^}]*$)//;
+ my $after = $1;
#print "block<" . join(' ', @block) . "><" . scalar(@block) . ">\n";
#print "stmt<$stmt>\n\n";
# Also nested if's often require braces to
# disambiguate the else binding so shhh there.
my @semi = ($stmt =~ /;/g);
+ push(@semi, "/**/") if ($stmt =~ m@/\*@);
##print "semi<" . scalar(@semi) . ">\n";
if ($lvl == 0 && scalar(@semi) < 2 &&
- $stmt !~ /{/ && $stmt !~ /\bif\b/) {
+ $stmt !~ /{/ && $stmt !~ /\bif\b/ &&
+ $before !~ /}/ && $after !~ /{/) {
my $herectx = "$here\n" . join("\n", @control, @block[1 .. $#block]) . "\n";
shift(@block);
- ERROR("braces {} are not necessary for single statement blocks\n" . $herectx);
+ WARN("braces {} are not necessary for single statement blocks\n" . $herectx);
}
}
}
WARN("Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
}
+# SPIN_LOCK_UNLOCKED & RW_LOCK_UNLOCKED are deprecated
+ if ($line =~ /\b(SPIN_LOCK_UNLOCKED|RW_LOCK_UNLOCKED)/) {
+ ERROR("Use of $1 is deprecated: see Documentation/spinlocks.txt\n" . $herecurr);
+ }
+
# warn about #if 0
if ($line =~ /^.#\s*if\s+0\b/) {
CHK("if this code is redundant consider removing it\n" .
# $clean = 0;
# }
+# warn about spacing in #ifdefs
+ if ($line =~ /^.#\s*(ifdef|ifndef|elif)\s\s+/) {
+ ERROR("exactly one space required after that #$1\n" . $herecurr);
+ }
+
# check for spinlock_t definitions without a comment.
if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/) {
my $which = $1;
}
}
# check of hardware specific defines
- if ($line =~ m@^.#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@) {
+ if ($line =~ m@^.#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
CHK("architecture specific defines should be avoided\n" . $herecurr);
}
# check the location of the inline attribute, that it is between
# storage class and type.
- if ($line =~ /$Type\s+(?:inline|__always_inline)\b/ ||
- $line =~ /\b(?:inline|always_inline)\s+$Storage/) {
+ if ($line =~ /\b$Type\s+$Inline\b/ ||
+ $line =~ /\b$Inline\s+$Storage\b/) {
ERROR("inline keyword should sit between storage class and type\n" . $herecurr);
}
CHK("__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
}
}
+
+# check for pointless casting of kmalloc return
+ if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
+ WARN("unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
+ }
}
if ($chk_patch && !$is_patch) {
projects / cascardo / linux.git / blobdiff