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#!/usr/bin/perl -w
# (c) 2001, Dave Jones. <davej@redhat.com> (the file handling bit)
# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
# (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
# (c) 2008,2009, Andy Whitcroft <apw@canonical.com>
# Licensed under the terms of the GNU GPL License version 2
use strict;
my $P = $0;
$P =~ s@.*/@@g;
my $V = '0.30';
use Getopt::Long qw(:config no_auto_abbrev);
my $quiet = 0;
my $tree = 1;
my $chk_signoff = 1;
my $chk_patch = 1;
my $tst_only;
my $emacs = 0;
my $terse = 0;
my $file = 0;
my $check = 0;
my $summary = 1;
my $mailback = 0;
my $summary_file = 0;
my $root;
my %debug;
my $help = 0;
sub help {
my ($exitcode) = @_;
print << "EOM";
Usage: $P [OPTION]... [FILE]...
Version: $V
Options:
-q, --quiet quiet
--no-tree run without a kernel tree
--no-signoff do not check for 'Signed-off-by' line
--patch treat FILE as patchfile (default)
--emacs emacs compile window format
--terse one line per report
-f, --file treat FILE as regular source file
--subjective, --strict enable more subjective tests
--root=PATH PATH to the kernel tree root
--no-summary suppress the per-file summary
--mailback only produce a report in case of warnings/errors
--summary-file include the filename in summary
--debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of
'values', 'possible', 'type', and 'attr' (default
is all off)
--test-only=WORD report only warnings/errors containing WORD
literally
-h, --help, --version display this help and exit
When FILE is - read standard input.
EOM
exit($exitcode);
}
GetOptions(
'q|quiet+' => \$quiet,
'tree!' => \$tree,
'signoff!' => \$chk_signoff,
'patch!' => \$chk_patch,
'emacs!' => \$emacs,
'terse!' => \$terse,
'f|file!' => \$file,
'subjective!' => \$check,
'strict!' => \$check,
'root=s' => \$root,
'summary!' => \$summary,
'mailback!' => \$mailback,
'summary-file!' => \$summary_file,
'debug=s' => \%debug,
'test-only=s' => \$tst_only,
'h|help' => \$help,
'version' => \$help
) or help(1);
help(0) if ($help);
my $exit = 0;
if ($#ARGV < 0) {
print "$P: no input files\n";
exit(1);
}
my $dbg_values = 0;
my $dbg_possible = 0;
my $dbg_type = 0;
my $dbg_attr = 0;
for my $key (keys %debug) {
## no critic
eval "\${dbg_$key} = '$debug{$key}';";
die "$@" if ($@);
}
if ($terse) {
$emacs = 1;
$quiet++;
}
if ($tree) {
if (defined $root) {
if (!top_of_kernel_tree($root)) {
die "$P: $root: --root does not point at a valid tree\n";
}
} else {
if (top_of_kernel_tree('.')) {
$root = '.';
} elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
top_of_kernel_tree($1)) {
$root = $1;
}
}
if (!defined $root) {
print "Must be run from the top-level dir. of a kernel tree\n";
exit(2);
}
}
my $emitted_corrupt = 0;
our $Ident = qr{
[A-Za-z_][A-Za-z\d_]*
(?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
}x;
our $Storage = qr{extern|static|asmlinkage};
our $Sparse = qr{
__user|
__kernel|
__force|
__iomem|
__must_check|
__init_refok|
__kprobes|
__ref
}x;
our $Attribute = qr{
const|
__read_mostly|
__kprobes|
__(?:mem|cpu|dev|)(?:initdata|init)|
____cacheline_aligned|
____cacheline_aligned_in_smp|
____cacheline_internodealigned_in_smp|
__weak
}x;
our $Modifier;
our $Inline = qr{inline|__always_inline|noinline};
our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
our $Lval = qr{$Ident(?:$Member)*};
our $Constant = qr{(?:[0-9]+|0x[0-9a-fA-F]+)[UL]*};
our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
our $Compare = qr{<=|>=|==|!=|<|>};
our $Operators = qr{
<=|>=|==|!=|
=>|->|<<|>>|<|>|!|~|
&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
}x;
our $NonptrType;
our $Type;
our $Declare;
our $UTF8 = qr {
[\x09\x0A\x0D\x20-\x7E] # ASCII
| [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
}x;
our $typeTypedefs = qr{(?x:
(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
atomic_t
)};
our @typeList = (
qr{void},
qr{(?:unsigned\s+)?char},
qr{(?:unsigned\s+)?short},
qr{(?:unsigned\s+)?int},
qr{(?:unsigned\s+)?long},
qr{(?:unsigned\s+)?long\s+int},
qr{(?:unsigned\s+)?long\s+long},
qr{(?:unsigned\s+)?long\s+long\s+int},
qr{unsigned},
qr{float},
qr{double},
qr{bool},
qr{struct\s+$Ident},
qr{union\s+$Ident},
qr{enum\s+$Ident},
qr{${Ident}_t},
qr{${Ident}_handler},
qr{${Ident}_handler_fn},
);
our @modifierList = (
qr{fastcall},
);
sub build_types {
my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)";
$Modifier = qr{(?:$Attribute|$Sparse|$mods)};
$NonptrType = qr{
(?:$Modifier\s+|const\s+)*
(?:
(?:typeof|__typeof__)\s*\(\s*\**\s*$Ident\s*\)|
(?:$typeTypedefs\b)|
(?:${all}\b)
)
(?:\s+$Modifier|\s+const)*
}x;
$Type = qr{
$NonptrType
(?:[\s\*]+\s*const|[\s\*]+|(?:\s*\[\s*\])+)?
(?:\s+$Inline|\s+$Modifier)*
}x;
$Declare = qr{(?:$Storage\s+)?$Type};
}
build_types();
$chk_signoff = 0 if ($file);
my @dep_includes = ();
my @dep_functions = ();
my $removal = "Documentation/feature-removal-schedule.txt";
if ($tree && -f "$root/$removal") {
open(my $REMOVE, '<', "$root/$removal") ||
die "$P: $removal: open failed - $!\n";
while (<$REMOVE>) {
if (/^Check:\s+(.*\S)/) {
for my $entry (split(/[, ]+/, $1)) {
if ($entry =~ m@include/(.*)@) {
push(@dep_includes, $1);
} elsif ($entry !~ m@/@) {
push(@dep_functions, $entry);
}
}
}
}
close($REMOVE);
}
my @rawlines = ();
my @lines = ();
my $vname;
for my $filename (@ARGV) {
my $FILE;
if ($file) {
open($FILE, '-|', "diff -u /dev/null $filename") ||
die "$P: $filename: diff failed - $!\n";
} elsif ($filename eq '-') {
open($FILE, '<&STDIN');
} else {
open($FILE, '<', "$filename") ||
die "$P: $filename: open failed - $!\n";
}
if ($filename eq '-') {
$vname = 'Your patch';
} else {
$vname = $filename;
}
while (<$FILE>) {
chomp;
push(@rawlines, $_);
}
close($FILE);
if (!process($filename)) {
$exit = 1;
}
@rawlines = ();
@lines = ();
}
exit($exit);
sub top_of_kernel_tree {
my ($root) = @_;
my @tree_check = (
"COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
"README", "Documentation", "arch", "include", "drivers",
"fs", "init", "ipc", "kernel", "lib", "scripts",
);
foreach my $check (@tree_check) {
if (! -e $root . '/' . $check) {
return 0;
}
}
return 1;
}
sub expand_tabs {
my ($str) = @_;
my $res = '';
my $n = 0;
for my $c (split(//, $str)) {
if ($c eq "\t") {
$res .= ' ';
$n++;
for (; ($n % 8) != 0; $n++) {
$res .= ' ';
}
next;
}
$res .= $c;
$n++;
}
return $res;
}
sub copy_spacing {
(my $res = shift) =~ tr/\t/ /c;
return $res;
}
sub line_stats {
my ($line) = @_;
# Drop the diff line leader and expand tabs
$line =~ s/^.//;
$line = expand_tabs($line);
# Pick the indent from the front of the line.
my ($white) = ($line =~ /^(\s*)/);
return (length($line), length($white));
}
my $sanitise_quote = '';
sub sanitise_line_reset {
my ($in_comment) = @_;
if ($in_comment) {
$sanitise_quote = '*/';
} else {
$sanitise_quote = '';
}
}
sub sanitise_line {
my ($line) = @_;
my $res = '';
my $l = '';
my $qlen = 0;
my $off = 0;
my $c;
# Always copy over the diff marker.
$res = substr($line, 0, 1);
for ($off = 1; $off < length($line); $off++) {
$c = substr($line, $off, 1);
# Comments we are wacking completly including the begin
# and end, all to $;.
if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
$sanitise_quote = '*/';
substr($res, $off, 2, "$;$;");
$off++;
next;
}
if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
$sanitise_quote = '';
substr($res, $off, 2, "$;$;");
$off++;
next;
}
if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') {
$sanitise_quote = '//';
substr($res, $off, 2, $sanitise_quote);
$off++;
next;
}
# A \ in a string means ignore the next character.
if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
$c eq "\\") {
substr($res, $off, 2, 'XX');
$off++;
next;
}
# Regular quotes.
if ($c eq "'" || $c eq '"') {
if ($sanitise_quote eq '') {
$sanitise_quote = $c;
substr($res, $off, 1, $c);
next;
} elsif ($sanitise_quote eq $c) {
$sanitise_quote = '';
}
}
#print "c<$c> SQ<$sanitise_quote>\n";
if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
substr($res, $off, 1, $;);
} elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") {
substr($res, $off, 1, $;);
} elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
substr($res, $off, 1, 'X');
} else {
substr($res, $off, 1, $c);
}
}
if ($sanitise_quote eq '//') {
$sanitise_quote = '';
}
# The pathname on a #include may be surrounded by '<' and '>'.
if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
my $clean = 'X' x length($1);
$res =~ s@\<.*\>@<$clean>@;
# The whole of a #error is a string.
} elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
my $clean = 'X' x length($1);
$res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
}
return $res;
}
sub ctx_statement_block {
my ($linenr, $remain, $off) = @_;
my $line = $linenr - 1;
my $blk = '';
my $soff = $off;
my $coff = $off - 1;
my $coff_set = 0;
my $loff = 0;
my $type = '';
my $level = 0;
my @stack = ();
my $p;
my $c;
my $len = 0;
my $remainder;
while (1) {
@stack = (['', 0]) if ($#stack == -1);
#warn "CSB: blk<$blk> remain<$remain>\n";
# If we are about to drop off the end, pull in more
# context.
if ($off >= $len) {
for (; $remain > 0; $line++) {
last if (!defined $lines[$line]);
next if ($lines[$line] =~ /^-/);
$remain--;
$loff = $len;
$blk .= $lines[$line] . "\n";
$len = length($blk);
$line++;
last;
}
# Bail if there is no further context.
#warn "CSB: blk<$blk> off<$off> len<$len>\n";
if ($off >= $len) {
last;
}
}
$p = $c;
$c = substr($blk, $off, 1);
$remainder = substr($blk, $off);
#warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
# Handle nested #if/#else.
if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
push(@stack, [ $type, $level ]);
} elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
($type, $level) = @{$stack[$#stack - 1]};
} elsif ($remainder =~ /^#\s*endif\b/) {
($type, $level) = @{pop(@stack)};
}
# Statement ends at the ';' or a close '}' at the
# outermost level.
if ($level == 0 && $c eq ';') {
last;
}
# An else is really a conditional as long as its not else if
if ($level == 0 && $coff_set == 0 &&
(!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
$remainder =~ /^(else)(?:\s|{)/ &&
$remainder !~ /^else\s+if\b/) {
$coff = $off + length($1) - 1;
$coff_set = 1;
#warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
#warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
}
if (($type eq '' || $type eq '(') && $c eq '(') {
$level++;
$type = '(';
}
if ($type eq '(' && $c eq ')') {
$level--;
$type = ($level != 0)? '(' : '';
if ($level == 0 && $coff < $soff) {
$coff = $off;
$coff_set = 1;
#warn "CSB: mark coff<$coff>\n";
}
}
if (($type eq '' || $type eq '{') && $c eq '{') {
$level++;
$type = '{';
}
if ($type eq '{' && $c eq '}') {
$level--;
$type = ($level != 0)? '{' : '';
if ($level == 0) {
last;
}
}
$off++;
}
# We are truly at the end, so shuffle to the next line.
if ($off == $len) {
$loff = $len + 1;
$line++;
$remain--;
}
my $statement = substr($blk, $soff, $off - $soff + 1);
my $condition = substr($blk, $soff, $coff - $soff + 1);
#warn "STATEMENT<$statement>\n";
#warn "CONDITION<$condition>\n";
#print "coff<$coff> soff<$off> loff<$loff>\n";
return ($statement, $condition,
$line, $remain + 1, $off - $loff + 1, $level);
}
sub statement_lines {
my ($stmt) = @_;
# Strip the diff line prefixes and rip blank lines at start and end.
$stmt =~ s/(^|\n)./$1/g;
$stmt =~ s/^\s*//;
$stmt =~ s/\s*$//;
my @stmt_lines = ($stmt =~ /\n/g);
return $#stmt_lines + 2;
}
sub statement_rawlines {
my ($stmt) = @_;
my @stmt_lines = ($stmt =~ /\n/g);
return $#stmt_lines + 2;
}
sub statement_block_size {
my ($stmt) = @_;
$stmt =~ s/(^|\n)./$1/g;
$stmt =~ s/^\s*{//;
$stmt =~ s/}\s*$//;
$stmt =~ s/^\s*//;
$stmt =~ s/\s*$//;
my @stmt_lines = ($stmt =~ /\n/g);
my @stmt_statements = ($stmt =~ /;/g);
my $stmt_lines = $#stmt_lines + 2;
my $stmt_statements = $#stmt_statements + 1;
if ($stmt_lines > $stmt_statements) {
return $stmt_lines;
} else {
return $stmt_statements;
}
}
sub ctx_statement_full {
my ($linenr, $remain, $off) = @_;
my ($statement, $condition, $level);
my (@chunks);
# Grab the first conditional/block pair.
($statement, $condition, $linenr, $remain, $off, $level) =
ctx_statement_block($linenr, $remain, $off);
#print "F: c<$condition> s<$statement> remain<$remain>\n";
push(@chunks, [ $condition, $statement ]);
if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
return ($level, $linenr, @chunks);
}
# Pull in the following conditional/block pairs and see if they
# could continue the statement.
for (;;) {
($statement, $condition, $linenr, $remain, $off, $level) =
ctx_statement_block($linenr, $remain, $off);
#print "C: c<$condition> s<$statement> remain<$remain>\n";
last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
#print "C: push\n";
push(@chunks, [ $condition, $statement ]);
}
return ($level, $linenr, @chunks);
}
sub ctx_block_get {
my ($linenr, $remain, $outer, $open, $close, $off) = @_;
my $line;
my $start = $linenr - 1;
my $blk = '';
my @o;
my @c;
my @res = ();
my $level = 0;
my @stack = ($level);
for ($line = $start; $remain > 0; $line++) {
next if ($rawlines[$line] =~ /^-/);
$remain--;
$blk .= $rawlines[$line];
# Handle nested #if/#else.
if ($rawlines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
push(@stack, $level);
} elsif ($rawlines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
$level = $stack[$#stack - 1];
} elsif ($rawlines[$line] =~ /^.\s*#\s*endif\b/) {
$level = pop(@stack);
}
foreach my $c (split(//, $rawlines[$line])) {
##print "C<$c>L<$level><$open$close>O<$off>\n";
if ($off > 0) {
$off--;
next;
}
if ($c eq $close && $level > 0) {
$level--;
last if ($level == 0);
} elsif ($c eq $open) {
$level++;
}
}
if (!$outer || $level <= 1) {
push(@res, $rawlines[$line]);
}
last if ($level == 0);
}
return ($level, @res);
}
sub ctx_block_outer {
my ($linenr, $remain) = @_;
my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
return @r;
}
sub ctx_block {
my ($linenr, $remain) = @_;
my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
return @r;
}
sub ctx_statement {
my ($linenr, $remain, $off) = @_;
my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
return @r;
}
sub ctx_block_level {
my ($linenr, $remain) = @_;
return ctx_block_get($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, $end_line) = @_;
# Catch a comment on the end of the line itself.
my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
return $current_comment if (defined $current_comment);
# Look through the context and try and figure out if there is a
# comment.
my $in_comment = 0;
$current_comment = '';
for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
my $line = $rawlines[$linenr - 1];
#warn " $line\n";
if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
$in_comment = 1;
}
if ($line =~ m@/\*@) {
$in_comment = 1;
}
if (!$in_comment && $current_comment ne '') {
$current_comment = '';
}
$current_comment .= $line . "\n" if ($in_comment);
if ($line =~ m@\*/@) {
$in_comment = 0;
}
}
chomp($current_comment);
return($current_comment);
}
sub ctx_has_comment {
my ($first_line, $end_line) = @_;
my $cmt = ctx_locate_comment($first_line, $end_line);
##print "LINE: $rawlines[$end_line - 1 ]\n";
##print "CMMT: $cmt\n";
return ($cmt ne '');
}
sub raw_line {
my ($linenr, $cnt) = @_;
my $offset = $linenr - 1;
$cnt++;
my $line;
while ($cnt) {
$line = $rawlines[$offset++];
next if (defined($line) && $line =~ /^-/);
$cnt--;
}
return $line;
}
sub cat_vet {
my ($vet) = @_;
my ($res, $coded);
$res = '';
while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
$res .= $1;
if ($2 ne '') {
$coded = sprintf("^%c", unpack('C', $2) + 64);
$res .= $coded;
}
}
$res =~ s/$/\$/;
return $res;
}
my $av_preprocessor = 0;
my $av_pending;
my @av_paren_type;
my $av_pend_colon;
sub annotate_reset {
$av_preprocessor = 0;
$av_pending = '_';
@av_paren_type = ('E');
$av_pend_colon = 'O';
}
sub annotate_values {
my ($stream, $type) = @_;
my $res;
my $var = '_' x length($stream);
my $cur = $stream;
print "$stream\n" if ($dbg_values > 1);
while (length($cur)) {
@av_paren_type = ('E') if ($#av_paren_type < 0);
print " <" . join('', @av_paren_type) .
"> <$type> <$av_pending>" if ($dbg_values > 1);
if ($cur =~ /^(\s+)/o) {
print "WS($1)\n" if ($dbg_values > 1);
if ($1 =~ /\n/ && $av_preprocessor) {
$type = pop(@av_paren_type);
$av_preprocessor = 0;
}
} elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\()/) {
print "DECLARE($1)\n" if ($dbg_values > 1);
$type = 'T';
} elsif ($cur =~ /^($Modifier)\s*/) {
print "MODIFIER($1)\n" if ($dbg_values > 1);
$type = 'T';
} elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
print "DEFINE($1,$2)\n" if ($dbg_values > 1);
$av_preprocessor = 1;
push(@av_paren_type, $type);
if ($2 ne '') {
$av_pending = 'N';
}
$type = 'E';
} elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
print "UNDEF($1)\n" if ($dbg_values > 1);
$av_preprocessor = 1;
push(@av_paren_type, $type);
} elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
print "PRE_START($1)\n" if ($dbg_values > 1);
$av_preprocessor = 1;
push(@av_paren_type, $type);
push(@av_paren_type, $type);
$type = 'E';
} elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
print "PRE_RESTART($1)\n" if ($dbg_values > 1);
$av_preprocessor = 1;
push(@av_paren_type, $av_paren_type[$#av_paren_type]);
$type = 'E';
} elsif ($cur =~ /^(\#\s*(?:endif))/o) {
print "PRE_END($1)\n" if ($dbg_values > 1);
$av_preprocessor = 1;
# Assume all arms of the conditional end as this
# one does, and continue as if the #endif was not here.
pop(@av_paren_type);
push(@av_paren_type, $type);
$type = 'E';
} elsif ($cur =~ /^(\\\n)/o) {
print "PRECONT($1)\n" if ($dbg_values > 1);
} elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
print "ATTR($1)\n" if ($dbg_values > 1);
$av_pending = $type;
$type = 'N';
} elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
print "SIZEOF($1)\n" if ($dbg_values > 1);
if (defined $2) {
$av_pending = 'V';
}
$type = 'N';
} elsif ($cur =~ /^(if|while|for)\b/o) {
print "COND($1)\n" if ($dbg_values > 1);
$av_pending = 'E';
$type = 'N';
} elsif ($cur =~/^(case)/o) {
print "CASE($1)\n" if ($dbg_values > 1);
$av_pend_colon = 'C';
$type = 'N';
} elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
print "KEYWORD($1)\n" if ($dbg_values > 1);
$type = 'N';
} elsif ($cur =~ /^(\()/o) {
print "PAREN('$1')\n" if ($dbg_values > 1);
push(@av_paren_type, $av_pending);
$av_pending = '_';
$type = 'N';
} elsif ($cur =~ /^(\))/o) {
my $new_type = pop(@av_paren_type);
if ($new_type ne '_') {
$type = $new_type;
print "PAREN('$1') -> $type\n"
if ($dbg_values > 1);
} else {
print "PAREN('$1')\n" if ($dbg_values > 1);
}
} elsif ($cur =~ /^($Ident)\s*\(/o) {
print "FUNC($1)\n" if ($dbg_values > 1);
$type = 'V';
$av_pending = 'V';
} elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
if (defined $2 && $type eq 'C' || $type eq 'T') {
$av_pend_colon = 'B';
} elsif ($type eq 'E') {
$av_pend_colon = 'L';
}
print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
$type = 'V';
} elsif ($cur =~ /^($Ident|$Constant)/o) {
print "IDENT($1)\n" if ($dbg_values > 1);
$type = 'V';
} elsif ($cur =~ /^($Assignment)/o) {
print "ASSIGN($1)\n" if ($dbg_values > 1);
$type = 'N';
} elsif ($cur =~/^(;|{|})/) {
print "END($1)\n" if ($dbg_values > 1);
$type = 'E';
$av_pend_colon = 'O';
} elsif ($cur =~/^(,)/) {
print "COMMA($1)\n" if ($dbg_values > 1);
$type = 'C';
} elsif ($cur =~ /^(\?)/o) {
print "QUESTION($1)\n" if ($dbg_values > 1);
$type = 'N';
} elsif ($cur =~ /^(:)/o) {
print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
substr($var, length($res), 1, $av_pend_colon);
if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
$type = 'E';
} else {
$type = 'N';
}
$av_pend_colon = 'O';
} elsif ($cur =~ /^(\[)/o) {
print "CLOSE($1)\n" if ($dbg_values > 1);
$type = 'N';
} elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
my $variant;
print "OPV($1)\n" if ($dbg_values > 1);
if ($type eq 'V') {
$variant = 'B';
} else {
$variant = 'U';
}
substr($var, length($res), 1, $variant);
$type = 'N';
} elsif ($cur =~ /^($Operators)/o) {
print "OP($1)\n" if ($dbg_values > 1);
if ($1 ne '++' && $1 ne '--') {
$type = 'N';
}
} elsif ($cur =~ /(^.)/o) {
print "C($1)\n" if ($dbg_values > 1);
}
if (defined $1) {
$cur = substr($cur, length($1));
$res .= $type x length($1);
}
}
return ($res, $var);
}
sub possible {
my ($possible, $line) = @_;
my $notPermitted = qr{(?:
^(?:
$Modifier|
$Storage|
$Type|
DEFINE_\S+
)$|
^(?:
goto|
return|
case|
else|
asm|__asm__|
do
)(?:\s|$)|
^(?:typedef|struct|enum)\b
)}x;
warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
if ($possible !~ $notPermitted) {
# Check for modifiers.
$possible =~ s/\s*$Storage\s*//g;
$possible =~ s/\s*$Sparse\s*//g;
if ($possible =~ /^\s*$/) {
} elsif ($possible =~ /\s/) {
$possible =~ s/\s*$Type\s*//g;
for my $modifier (split(' ', $possible)) {
if ($modifier !~ $notPermitted) {
warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
push(@modifierList, $modifier);
}
}
} else {
warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
push(@typeList, $possible);
}
build_types();
} else {
warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
}
}
my $prefix = '';
sub report {
if (defined $tst_only && $_[0] !~ /\Q$tst_only\E/) {
return 0;
}
my $line = $prefix . $_[0];
$line = (split('\n', $line))[0] . "\n" if ($terse);
push(our @report, $line);
return 1;
}
sub report_dump {
our @report;
}
sub ERROR {
if (report("ERROR: $_[0]\n")) {
our $clean = 0;
our $cnt_error++;
}
}
sub WARN {
if (report("WARNING: $_[0]\n")) {
our $clean = 0;
our $cnt_warn++;
}
}
sub CHK {
if ($check && report("CHECK: $_[0]\n")) {
our $clean = 0;
our $cnt_chk++;
}
}
sub check_absolute_file {
my ($absolute, $herecurr) = @_;
my $file = $absolute;
##print "absolute<$absolute>\n";
# See if any suffix of this path is a path within the tree.
while ($file =~ s@^[^/]*/@@) {
if (-f "$root/$file") {
##print "file<$file>\n";
last;
}
}
if (! -f _) {
return 0;
}
# It is, so see if the prefix is acceptable.
my $prefix = $absolute;
substr($prefix, -length($file)) = '';
##print "prefix<$prefix>\n";
if ($prefix ne ".../") {
WARN("use relative pathname instead of absolute in changelog text\n" . $herecurr);
}
}
sub process {
my $filename = shift;
my $linenr=0;
my $prevline="";
my $prevrawline="";
my $stashline="";
my $stashrawline="";
my $length;
my $indent;
my $previndent=0;
my $stashindent=0;
our $clean = 1;
my $signoff = 0;
my $is_patch = 0;
our @report = ();
our $cnt_lines = 0;
our $cnt_error = 0;
our $cnt_warn = 0;
our $cnt_chk = 0;
# Trace the real file/line as we go.
my $realfile = '';
my $realline = 0;
my $realcnt = 0;
my $here = '';
my $in_comment = 0;
my $comment_edge = 0;
my $first_line = 0;
my $p1_prefix = '';
my $prev_values = 'E';
# suppression flags
my %suppress_ifbraces;
my %suppress_whiletrailers;
my %suppress_export;
# Pre-scan the patch sanitizing the lines.
# Pre-scan the patch looking for any __setup documentation.
#
my @setup_docs = ();
my $setup_docs = 0;
sanitise_line_reset();
my $line;
foreach my $rawline (@rawlines) {
$linenr++;
$line = $rawline;
if ($rawline=~/^\+\+\+\s+(\S+)/) {
$setup_docs = 0;
if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
$setup_docs = 1;
}
#next;
}
if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
$realline=$1-1;
if (defined $2) {
$realcnt=$3+1;
} else {
$realcnt=1+1;
}
$in_comment = 0;
# Guestimate if this is a continuing comment. Run
# the context looking for a comment "edge". If this
# edge is a close comment then we must be in a comment
# at context start.
my $edge;
my $cnt = $realcnt;
for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
next if (defined $rawlines[$ln - 1] &&
$rawlines[$ln - 1] =~ /^-/);
$cnt--;
#print "RAW<$rawlines[$ln - 1]>\n";
last if (!defined $rawlines[$ln - 1]);
if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
$rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
($edge) = $1;
last;
}
}
if (defined $edge && $edge eq '*/') {
$in_comment = 1;
}
# Guestimate if this is a continuing comment. If this
# is the start of a diff block and this line starts
# ' *' then it is very likely a comment.
if (!defined $edge &&
$rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
{
$in_comment = 1;
}
##print "COMMENT:$in_comment edge<$edge> $rawline\n";
sanitise_line_reset($in_comment);
} elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
# Standardise the strings and chars within the input to
# simplify matching -- only bother with positive lines.
$line = sanitise_line($rawline);
}
push(@lines, $line);
if ($realcnt > 1) {
$realcnt-- if ($line =~ /^(?:\+| |$)/);
} else {
$realcnt = 0;
}
#print "==>$rawline\n";
#print "-->$line\n";
if ($setup_docs && $line =~ /^\+/) {
push(@setup_docs, $line);
}
}
$prefix = '';
$realcnt = 0;
$linenr = 0;
foreach my $line (@lines) {
$linenr++;
my $rawline = $rawlines[$linenr - 1];
#extract the line range in the file after the patch is applied
if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
$is_patch = 1;
$first_line = $linenr + 1;
$realline=$1-1;
if (defined $2) {
$realcnt=$3+1;
} else {
$realcnt=1+1;
}
annotate_reset();
$prev_values = 'E';
%suppress_ifbraces = ();
%suppress_whiletrailers = ();
%suppress_export = ();
next;
# track the line number as we move through the hunk, note that
# new versions of GNU diff omit the leading space on completely
# blank context lines so we need to count that too.
} elsif ($line =~ /^( |\+|$)/) {
$realline++;
$realcnt-- if ($realcnt != 0);
# Measure the line length and indent.
($length, $indent) = line_stats($rawline);
# Track the previous line.
($prevline, $stashline) = ($stashline, $line);
($previndent, $stashindent) = ($stashindent, $indent);
($prevrawline, $stashrawline) = ($stashrawline, $rawline);
#warn "line<$line>\n";
} elsif ($realcnt == 1) {
$realcnt--;
}
my $hunk_line = ($realcnt != 0);
#make up the handle for any error we report on this line
$prefix = "$filename:$realline: " if ($emacs && $file);
$prefix = "$filename:$linenr: " if ($emacs && !$file);
$here = "#$linenr: " if (!$file);
$here = "#$realline: " if ($file);
# extract the filename as it passes
if ($line=~/^\+\+\+\s+(\S+)/) {
$realfile = $1;
$realfile =~ s@^([^/]*)/@@;
$p1_prefix = $1;
if (!$file && $tree && $p1_prefix ne '' &&
-e "$root/$p1_prefix") {
WARN("patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
}
if ($realfile =~ m@^include/asm/@) {
ERROR("do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
}
next;
}
$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
my $hereline = "$here\n$rawline\n";
my $herecurr = "$here\n$rawline\n";
my $hereprev = "$here\n$prevrawline\n$rawline\n";
$cnt_lines++ if ($realcnt != 0);
#check the patch for a signoff:
if ($line =~ /^\s*signed-off-by:/i) {
# This is a signoff, if ugly, so do not double report.
$signoff++;
if (!($line =~ /^\s*Signed-off-by:/)) {
WARN("Signed-off-by: is the preferred form\n" .
$herecurr);
}
if ($line =~ /^\s*signed-off-by:\S/i) {
WARN("space required after Signed-off-by:\n" .
$herecurr);
}
}
# Check for wrappage within a valid hunk of the file
if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
ERROR("patch seems to be corrupt (line wrapped?)\n" .
$herecurr) if (!$emitted_corrupt++);
}
# Check for absolute kernel paths.
if ($tree) {
while ($line =~ m{(?:^|\s)(/\S*)}g) {
my $file = $1;
if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
check_absolute_file($1, $herecurr)) {
#
} else {
check_absolute_file($file, $herecurr);
}
}
}
# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
if (($realfile =~ /^$/ || $line =~ /^\+/) &&
$rawline !~ m/^$UTF8*$/) {
my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
my $blank = copy_spacing($rawline);
my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
my $hereptr = "$hereline$ptr\n";
ERROR("Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
}
# ignore non-hunk lines and lines being removed
next if (!$hunk_line || $line =~ /^-/);
#trailing whitespace
if ($line =~ /^\+.*\015/) {
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
ERROR("DOS line endings\n" . $herevet);
} elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
ERROR("trailing whitespace\n" . $herevet);
}
# check we are in a valid source file if not then ignore this hunk
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
#80 column limit
if ($line =~ /^\+/ && $prevrawline !~ /\/\*\*/ &&
$rawline !~ /^.\s*\*\s*\@$Ident\s/ &&
$line !~ /^\+\s*printk\s*\(\s*(?:KERN_\S+\s*)?"[X\t]*"\s*(?:,|\)\s*;)\s*$/ &&
$length > 80)
{
WARN("line over 80 characters\n" . $herecurr);
}
# check for adding lines without a newline.
if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
WARN("adding a line without newline at end of file\n" . $herecurr);
}
# Blackfin: use hi/lo macros
if ($realfile =~ m@arch/blackfin/.*\.S$@) {
if ($line =~ /\.[lL][[:space:]]*=.*&[[:space:]]*0x[fF][fF][fF][fF]/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("use the LO() macro, not (... & 0xFFFF)\n" . $herevet);
}
if ($line =~ /\.[hH][[:space:]]*=.*>>[[:space:]]*16/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("use the HI() macro, not (... >> 16)\n" . $herevet);
}
}
# check we are in a valid source file C or perl if not then ignore this hunk
next if ($realfile !~ /\.(h|c|pl)$/);
# at the beginning of a line any tabs must come first and anything
# more than 8 must use tabs.
if ($rawline =~ /^\+\s* \t\s*\S/ ||
$rawline =~ /^\+\s* \s*/) {
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
ERROR("code indent should use tabs where possible\n" . $herevet);
}
# check we are in a valid C source file if not then ignore this hunk
next if ($realfile !~ /\.(h|c)$/);
# check for RCS/CVS revision markers
if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
WARN("CVS style keyword markers, these will _not_ be updated\n". $herecurr);
}
# Blackfin: don't use __builtin_bfin_[cs]sync
if ($line =~ /__builtin_bfin_csync/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("use the CSYNC() macro in asm/blackfin.h\n" . $herevet);
}
if ($line =~ /__builtin_bfin_ssync/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("use the SSYNC() macro in asm/blackfin.h\n" . $herevet);
}
# Check for potential 'bare' types
my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
$realline_next);
if ($realcnt && $line =~ /.\s*\S/) {
($stat, $cond, $line_nr_next, $remain_next, $off_next) =
ctx_statement_block($linenr, $realcnt, 0);
$stat =~ s/\n./\n /g;
$cond =~ s/\n./\n /g;
# Find the real next line.
$realline_next = $line_nr_next;
if (defined $realline_next &&
(!defined $lines[$realline_next - 1] ||
substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) {
$realline_next++;
}
my $s = $stat;
$s =~ s/{.*$//s;
# Ignore goto labels.
if ($s =~ /$Ident:\*$/s) {
# Ignore functions being called
} elsif ($s =~ /^.\s*$Ident\s*\(/s) {
} elsif ($s =~ /^.\s*else\b/s) {
# declarations always start with types
} elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) {
my $type = $1;
$type =~ s/\s+/ /g;
possible($type, "A:" . $s);
# definitions in global scope can only start with types
} elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
possible($1, "B:" . $s);
}
# any (foo ... *) is a pointer cast, and foo is a type
while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
possible($1, "C:" . $s);
}
# Check for any sort of function declaration.
# int foo(something bar, other baz);
# void (*store_gdt)(x86_descr_ptr *);
if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
my ($name_len) = length($1);
my $ctx = $s;
substr($ctx, 0, $name_len + 1, '');
$ctx =~ s/\)[^\)]*$//;
for my $arg (split(/\s*,\s*/, $ctx)) {
if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
possible($1, "D:" . $s);
}
}
}
}
#
# Checks which may be anchored in the context.
#
# Check for switch () and associated case and default
# statements should be at the same indent.
if ($line=~/\bswitch\s*\(.*\)/) {
my $err = '';
my $sep = '';
my @ctx = ctx_block_outer($linenr, $realcnt);
shift(@ctx);
for my $ctx (@ctx) {
my ($clen, $cindent) = line_stats($ctx);
if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
$indent != $cindent) {
$err .= "$sep$ctx\n";
$sep = '';
} else {
$sep = "[...]\n";
}
}
if ($err ne '') {
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 !~ /^.\s*\#/) {
my $pre_ctx = "$1$2";
my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
my $ctx_cnt = $realcnt - $#ctx - 1;
my $ctx = join("\n", @ctx);
my $ctx_ln = $linenr;
my $ctx_skip = $realcnt;
while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
defined $lines[$ctx_ln - 1] &&
$lines[$ctx_ln - 1] =~ /^-/)) {
##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
$ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
$ctx_ln++;
}
#print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
#print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
ERROR("that open brace { should be on the previous line\n" .
"$here\n$ctx\n$lines[$ctx_ln - 1]\n");
}
if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
$ctx =~ /\)\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[$ctx_ln - 1]\n");
}
}
}
# Check relative indent for conditionals and blocks.
if ($line =~ /\b(?:(?:if|while|for)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
my ($s, $c) = ($stat, $cond);
substr($s, 0, length($c), '');
# Make sure we remove the line prefixes as we have
# none on the first line, and are going to readd them
# where necessary.
$s =~ s/\n./\n/gs;
# Find out how long the conditional actually is.
my @newlines = ($c =~ /\n/gs);
my $cond_lines = 1 + $#newlines;
# We want to check the first line inside the block
# starting at the end of the conditional, so remove:
# 1) any blank line termination
# 2) any opening brace { on end of the line
# 3) any do (...) {
my $continuation = 0;
my $check = 0;
$s =~ s/^.*\bdo\b//;
$s =~ s/^\s*{//;
if ($s =~ s/^\s*\\//) {
$continuation = 1;
}
if ($s =~ s/^\s*?\n//) {
$check = 1;
$cond_lines++;
}
# Also ignore a loop construct at the end of a
# preprocessor statement.
if (($prevline =~ /^.\s*#\s*define\s/ ||
$prevline =~ /\\\s*$/) && $continuation == 0) {
$check = 0;
}
my $cond_ptr = -1;
$continuation = 0;
while ($cond_ptr != $cond_lines) {
$cond_ptr = $cond_lines;
# If we see an #else/#elif then the code
# is not linear.
if ($s =~ /^\s*\#\s*(?:else|elif)/) {
$check = 0;
}
# Ignore:
# 1) blank lines, they should be at 0,
# 2) preprocessor lines, and
# 3) labels.
if ($continuation ||
$s =~ /^\s*?\n/ ||
$s =~ /^\s*#\s*?/ ||
$s =~ /^\s*$Ident\s*:/) {
$continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
if ($s =~ s/^.*?\n//) {
$cond_lines++;
}
}
}
my (undef, $sindent) = line_stats("+" . $s);
my $stat_real = raw_line($linenr, $cond_lines);
# Check if either of these lines are modified, else
# this is not this patch's fault.
if (!defined($stat_real) ||
$stat !~ /^\+/ && $stat_real !~ /^\+/) {
$check = 0;
}
if (defined($stat_real) && $cond_lines > 1) {
$stat_real = "[...]\n$stat_real";
}
#print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
if ($check && (($sindent % 8) != 0 ||
($sindent <= $indent && $s ne ''))) {
WARN("suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
}
}
# Track the 'values' across context and added lines.
my $opline = $line; $opline =~ s/^./ /;
my ($curr_values, $curr_vars) =
annotate_values($opline . "\n", $prev_values);
$curr_values = $prev_values . $curr_values;
if ($dbg_values) {
my $outline = $opline; $outline =~ s/\t/ /g;
print "$linenr > .$outline\n";
print "$linenr > $curr_values\n";
print "$linenr > $curr_vars\n";
}
$prev_values = substr($curr_values, -1);
#ignore lines not being added
if ($line=~/^[^\+]/) {next;}
# TEST: allow direct testing of the type matcher.
if ($dbg_type) {
if ($line =~ /^.\s*$Declare\s*$/) {
ERROR("TEST: is type\n" . $herecurr);
} elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
ERROR("TEST: is not type ($1 is)\n". $herecurr);
}
next;
}
# TEST: allow direct testing of the attribute matcher.
if ($dbg_attr) {
if ($line =~ /^.\s*$Modifier\s*$/) {
ERROR("TEST: is attr\n" . $herecurr);
} elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
ERROR("TEST: is not attr ($1 is)\n". $herecurr);
}
next;
}
# check for initialisation to aggregates open brace on the next line
if ($line =~ /^.\s*{/ &&
$prevline =~ /(?:^|[^=])=\s*$/) {
ERROR("that open brace { should be on the previous line\n" . $hereprev);
}
#
# Checks which are anchored on the added line.
#
# check for malformed paths in #include statements (uses RAW line)
if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
my $path = $1;
if ($path =~ m{//}) {
ERROR("malformed #include filename\n" .
$herecurr);
}
}
# no C99 // comments
if ($line =~ m{//}) {
ERROR("do not use C99 // comments\n" . $herecurr);
}
# Remove C99 comments.
$line =~ s@//.*@@;
$opline =~ s@//.*@@;
# EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
# the whole statement.
#print "APW <$lines[$realline_next - 1]>\n";
if (defined $realline_next &&
exists $lines[$realline_next - 1] &&
!defined $suppress_export{$realline_next} &&
($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
$lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
my $name = $1;
if ($stat !~ /(?:
\n.}\s*$|
^.DEFINE_$Ident\(\Q$name\E\)|
^.DECLARE_$Ident\(\Q$name\E\)|
^.LIST_HEAD\(\Q$name\E\)|
^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
\b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\()
)/x) {
#print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n";
$suppress_export{$realline_next} = 2;
} else {
$suppress_export{$realline_next} = 1;
}
}
if (!defined $suppress_export{$linenr} &&
$prevline =~ /^.\s*$/ &&
($line =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
$line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
#print "FOO B <$lines[$linenr - 1]>\n";
$suppress_export{$linenr} = 2;
}
if (defined $suppress_export{$linenr} &&
$suppress_export{$linenr} == 2) {
WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
}
# check for external initialisers.
if ($line =~ /^.$Type\s*$Ident\s*(?:\s+$Modifier)*\s*=\s*(0|NULL|false)\s*;/) {
ERROR("do not initialise externals to 0 or NULL\n" .
$herecurr);
}
# check for static initialisers.
if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
ERROR("do not initialise statics to 0 or NULL\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+$Ident\s*\(/ &&
$line !~ /\b$typeTypedefs\b/ &&
$line !~ /\b__bitwise(?:__|)\b/) {
WARN("do not add new typedefs\n" . $herecurr);
}
# * goes on variable not on type
# (char*[ const])
if ($line =~ m{\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\)}) {
my ($from, $to) = ($1, $1);
# Should start with a space.
$to =~ s/^(\S)/ $1/;
# Should not end with a space.
$to =~ s/\s+$//;
# '*'s should not have spaces between.
while ($to =~ s/\*\s+\*/\*\*/) {
}
#print "from<$from> to<$to>\n";
if ($from ne $to) {
ERROR("\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr);
}
} elsif ($line =~ m{\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident)}) {
my ($from, $to, $ident) = ($1, $1, $2);
# Should start with a space.
$to =~ s/^(\S)/ $1/;
# Should not end with a space.
$to =~ s/\s+$//;
# '*'s should not have spaces between.
while ($to =~ s/\*\s+\*/\*\*/) {
}
# Modifiers should have spaces.
$to =~ s/(\b$Modifier$)/$1 /;
#print "from<$from> to<$to> ident<$ident>\n";
if ($from ne $to && $ident !~ /^$Modifier$/) {
ERROR("\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr);
}
}
# # no BUG() or BUG_ON()
# if ($line =~ /\b(BUG|BUG_ON)\b/) {
# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
# print "$herecurr";
# $clean = 0;
# }
if ($line =~ /\bLINUX_VERSION_CODE\b/) {
WARN("LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
}
# printk should use KERN_* levels. Note that follow on printk's on the
# same line do not need a level, so we use the current block context
# to try and find and validate the current printk. In summary the current
# printk includes all preceeding printk's which have no newline on the end.
# we assume the first bad printk is the one to report.
if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
my $ok = 0;
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
#print "CHECK<$lines[$ln - 1]\n";
# we have a preceeding printk if it ends
# with "\n" ignore it, else it is to blame
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
if ($rawlines[$ln - 1] !~ m{\\n"}) {
$ok = 1;
}
last;
}
}
if ($ok == 0) {
WARN("printk() should include KERN_ facility level\n" . $herecurr);
}
}
# function brace can't be on same line, except for #defines of do while,
# or if closed on same line
if (($line=~/$Type\s*$Ident\(.*\).*\s{/) and
!($line=~/\#\s*define.*do\s{/) and !($line=~/}/)) {
ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
}
# open braces for enum, union and struct go on the same line.
if ($line =~ /^.\s*{/ &&
$prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
}
# check for spacing round square brackets; allowed:
# 1. with a type on the left -- int [] a;
# 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
# 3. inside a curly brace -- = { [0...10] = 5 }
while ($line =~ /(.*?\s)\[/g) {
my ($where, $prefix) = ($-[1], $1);
if ($prefix !~ /$Type\s+$/ &&
($where != 0 || $prefix !~ /^.\s+$/) &&
$prefix !~ /{\s+$/) {
ERROR("space prohibited before open square bracket '['\n" . $herecurr);
}
}
# check for spaces between functions and their parentheses.
while ($line =~ /($Ident)\s+\(/g) {
my $name = $1;
my $ctx_before = substr($line, 0, $-[1]);
my $ctx = "$ctx_before$name";
# Ignore those directives where spaces _are_ permitted.
if ($name =~ /^(?:
if|for|while|switch|return|case|
volatile|__volatile__|
__attribute__|format|__extension__|
asm|__asm__)$/x)
{
# cpp #define statements have non-optional spaces, ie
# if there is a space between the name and the open
# parenthesis it is simply not a parameter group.
} elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
# cpp #elif statement condition may start with a (
} elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
# If this whole things ends with a type its most
# likely a typedef for a function.
} elsif ($ctx =~ /$Type$/) {
} else {
WARN("space prohibited between function name and open parenthesis '('\n" . $herecurr);
}
}
# Check operator spacing.
if (!($line=~/\#\s*include/)) {
my $ops = qr{
<<=|>>=|<=|>=|==|!=|
\+=|-=|\*=|\/=|%=|\^=|\|=|&=|
=>|->|<<|>>|<|>|=|!|~|
&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
\?|:
}x;
my @elements = split(/($ops|;)/, $opline);
my $off = 0;
my $blank = copy_spacing($opline);
for (my $n = 0; $n < $#elements; $n += 2) {
$off += length($elements[$n]);
# Pick up the preceeding and succeeding characters.
my $ca = substr($opline, 0, $off);
my $cc = '';
if (length($opline) >= ($off + length($elements[$n + 1]))) {
$cc = substr($opline, $off + length($elements[$n + 1]));
}
my $cb = "$ca$;$cc";
my $a = '';
$a = 'V' if ($elements[$n] ne '');
$a = 'W' if ($elements[$n] =~ /\s$/);
$a = 'C' if ($elements[$n] =~ /$;$/);
$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
$a = 'O' if ($elements[$n] eq '');
$a = 'E' if ($ca =~ /^\s*$/);
my $op = $elements[$n + 1];
my $c = '';
if (defined $elements[$n + 2]) {
$c = 'V' if ($elements[$n + 2] ne '');
$c = 'W' if ($elements[$n + 2] =~ /^\s/);
$c = 'C' if ($elements[$n + 2] =~ /^$;/);
$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
$c = 'O' if ($elements[$n + 2] eq '');
$c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
} else {
$c = 'E';
}
my $ctx = "${a}x${c}";
my $at = "(ctx:$ctx)";
my $ptr = substr($blank, 0, $off) . "^";
my $hereptr = "$hereline$ptr\n";
# Pull out the value of this operator.
my $op_type = substr($curr_values, $off + 1, 1);
# Get the full operator variant.
my $opv = $op . substr($curr_vars, $off, 1);
# Ignore operators passed as parameters.
if ($op_type ne 'V' &&
$ca =~ /\s$/ && $cc =~ /^\s*,/) {
# # Ignore comments
# } elsif ($op =~ /^$;+$/) {
# ; should have either the end of line or a space or \ after it
} elsif ($op eq ';') {
if ($ctx !~ /.x[WEBC]/ &&
$cc !~ /^\\/ && $cc !~ /^;/) {
ERROR("space required after that '$op' $at\n" . $hereptr);
}
# // is a comment
} elsif ($op eq '//') {
# No spaces for:
# ->
# : when part of a bitfield
} elsif ($op eq '->' || $opv eq ':B') {
if ($ctx =~ /Wx.|.xW/) {
ERROR("spaces prohibited around that '$op' $at\n" . $hereptr);
}
# , must have a space on the right.
} elsif ($op eq ',') {
if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
ERROR("space required after that '$op' $at\n" . $hereptr);
}
# '*' as part of a type definition -- reported already.
} elsif ($opv eq '*_') {
#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 '~' ||
$opv eq '*U' || $opv eq '-U' ||
$opv eq '&U' || $opv eq '&&U') {
if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
ERROR("space required before that '$op' $at\n" . $hereptr);
}
if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
# A unary '*' may be const
} elsif ($ctx =~ /.xW/) {
ERROR("space prohibited after that '$op' $at\n" . $hereptr);
}
# unary ++ and unary -- are allowed no space on one side.
} elsif ($op eq '++' or $op eq '--') {
if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
ERROR("space required one side of that '$op' $at\n" . $hereptr);
}
if ($ctx =~ /Wx[BE]/ ||
($ctx =~ /Wx./ && $cc =~ /^;/)) {
ERROR("space prohibited before that '$op' $at\n" . $hereptr);
}
if ($ctx =~ /ExW/) {
ERROR("space prohibited after 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 '+' or $op eq '-' or
$op eq '*' or $op eq '/' or
$op eq '%')
{
if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
ERROR("need consistent spacing around '$op' $at\n" .
$hereptr);
}
# A colon needs no spaces before when it is
# terminating a case value or a label.
} elsif ($opv eq ':C' || $opv eq ':L') {
if ($ctx =~ /Wx./) {
ERROR("space prohibited before that '$op' $at\n" . $hereptr);
}
# All the others need spaces both sides.
} elsif ($ctx !~ /[EWC]x[CWE]/) {
my $ok = 0;
# Ignore email addresses <foo@bar>
if (($op eq '<' &&
$cc =~ /^\S+\@\S+>/) ||
($op eq '>' &&
$ca =~ /<\S+\@\S+$/))
{
$ok = 1;
}
# Ignore ?:
if (($opv eq ':O' && $ca =~ /\?$/) ||
($op eq '?' && $cc =~ /^:/)) {
$ok = 1;
}
if ($ok == 0) {
ERROR("spaces required around that '$op' $at\n" . $hereptr);
}
}
$off += length($elements[$n + 1]);
}
}
# check for multiple assignments
if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
CHK("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.*/) {
##
## # 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 !~ /\($Type\){/) ||
$line =~ /do{/) {
ERROR("space required before the open brace '{'\n" . $herecurr);
}
# closing brace should have a space following it when it has anything
# on the line
if ($line =~ /}(?!(?:,|;|\)))\S/) {
ERROR("space required after that close brace '}'\n" . $herecurr);
}
# check spacing on square brackets
if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
ERROR("space prohibited after that open square bracket '['\n" . $herecurr);
}
if ($line =~ /\s\]/) {
ERROR("space prohibited before that close square bracket ']'\n" . $herecurr);
}
# check spacing on parentheses
if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
$line !~ /for\s*\(\s+;/) {
ERROR("space prohibited after that open parenthesis '('\n" . $herecurr);
}
if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
$line !~ /for\s*\(.*;\s+\)/ &&
$line !~ /:\s+\)/) {
ERROR("space prohibited 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:/)) {
WARN("labels should not be indented\n" . $herecurr);
}
# Return is not a function.
if (defined($stat) && $stat =~ /^.\s*return(\s*)(\(.*);/s) {
my $spacing = $1;
my $value = $2;
# Flatten any parentheses
$value =~ s/\)\(/\) \(/g;
while ($value =~ s/\[[^\{\}]*\]/1/ ||
$value !~ /(?:$Ident|-?$Constant)\s*
$Compare\s*
(?:$Ident|-?$Constant)/x &&
$value =~ s/\([^\(\)]*\)/1/) {
}
if ($value =~ /^(?:$Ident|-?$Constant)$/) {
ERROR("return is not a function, parentheses are not required\n" . $herecurr);
} elsif ($spacing !~ /\s+/) {
ERROR("space required before the open parenthesis '('\n" . $herecurr);
}
}
# Need a space before open parenthesis after if, while etc
if ($line=~/\b(if|while|for|switch)\(/) {
ERROR("space required before the open parenthesis '('\n" . $herecurr);
}
# Check for illegal assignment in if conditional -- and check for trailing
# statements after the conditional.
if ($line =~ /do\s*(?!{)/) {
my ($stat_next) = ctx_statement_block($line_nr_next,
$remain_next, $off_next);
$stat_next =~ s/\n./\n /g;
##print "stat<$stat> stat_next<$stat_next>\n";
if ($stat_next =~ /^\s*while\b/) {
# If the statement carries leading newlines,
# then count those as offsets.
my ($whitespace) =
($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
my $offset =
statement_rawlines($whitespace) - 1;
$suppress_whiletrailers{$line_nr_next +
$offset} = 1;
}
}
if (!defined $suppress_whiletrailers{$linenr} &&
$line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
my ($s, $c) = ($stat, $cond);
if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
ERROR("do not use assignment in if condition\n" . $herecurr);
}
# Find out what is on the end of the line after the
# conditional.
substr($s, 0, length($c), '');
$s =~ s/\n.*//g;
$s =~ s/$;//g; # Remove any comments
if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
$c !~ /}\s*while\s*/)
{
# Find out how long the conditional actually is.
my @newlines = ($c =~ /\n/gs);
my $cond_lines = 1 + $#newlines;
my $stat_real = raw_line($linenr, $cond_lines);
if (defined($stat_real) && $cond_lines > 1) {
$stat_real = "[...]\n$stat_real";
}
ERROR("trailing statements should be on next line\n" . $herecurr . $stat_real);
}
}
# Check for bitwise tests written as boolean
if ($line =~ /
(?:
(?:\[|\(|\&\&|\|\|)
\s*0[xX][0-9]+\s*
(?:\&\&|\|\|)
|
(?:\&\&|\|\|)
\s*0[xX][0-9]+\s*
(?:\&\&|\|\||\)|\])
)/x)
{
WARN("boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
}
# if and else should not have general statements after it
if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
my $s = $1;
$s =~ s/$;//g; # Remove any comments
if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
ERROR("trailing statements should be on next line\n" . $herecurr);
}
}
# if should not continue a brace
if ($line =~ /}\s*if\b/) {
ERROR("trailing statements should be on next line\n" .
$herecurr);
}
# case and default should not have general statements after them
if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
$line !~ /\G(?:
(?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
\s*return\s+
)/xg)
{
ERROR("trailing statements should be on next line\n" . $herecurr);
}
# Check for }<nl>else {, these must be at the same
# indent level to be relevant to each other.
if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
$previndent == $indent) {
ERROR("else should follow close brace '}'\n" . $hereprev);
}
if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ and
$previndent == $indent) {
my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
# Find out what is on the end of the line after the
# conditional.
substr($s, 0, length($c), '');
$s =~ s/\n.*//g;
if ($s =~ /^\s*;/) {
ERROR("while should follow close brace '}'\n" . $hereprev);
}
}
#studly caps, commented out until figure out how to distinguish between use of existing and adding new
# if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
# print "No studly caps, use _\n";
# print "$herecurr";
# $clean = 0;
# }
#no spaces allowed after \ in define
if ($line=~/\#\s*define.*\\\s$/) {
WARN("Whitepspace after \\ makes next lines useless\n" . $herecurr);
}
#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
my $file = "$1.h";
my $checkfile = "include/linux/$file";
if (-f "$root/$checkfile" &&
$realfile ne $checkfile &&
$1 ne 'irq')
{
if ($realfile =~ m{^arch/}) {
CHK("Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
} else {
WARN("Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
}
}
}
# multi-statement macros should be enclosed in a do while loop, grab the
# first statement and ensure its the whole macro if its not enclosed
# in a known good container
if ($realfile !~ m@/vmlinux.lds.h$@ &&
$line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
my $ln = $linenr;
my $cnt = $realcnt;
my ($off, $dstat, $dcond, $rest);
my $ctx = '';
my $args = defined($1);
# Find the end of the macro and limit our statement
# search to that.
while ($cnt > 0 && defined $lines[$ln - 1] &&
$lines[$ln - 1] =~ /^(?:-|..*\\$)/)
{
$ctx .= $rawlines[$ln - 1] . "\n";
$cnt-- if ($lines[$ln - 1] !~ /^-/);
$ln++;
}
$ctx .= $rawlines[$ln - 1];
($dstat, $dcond, $ln, $cnt, $off) =
ctx_statement_block($linenr, $ln - $linenr + 1, 0);
#print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
#print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
# Extract the remainder of the define (if any) and
# rip off surrounding spaces, and trailing \'s.
$rest = '';
while ($off != 0 || ($cnt > 0 && $rest =~ /\\\s*$/)) {
#print "ADDING cnt<$cnt> $off <" . substr($lines[$ln - 1], $off) . "> rest<$rest>\n";
if ($off != 0 || $lines[$ln - 1] !~ /^-/) {
$rest .= substr($lines[$ln - 1], $off) . "\n";
$cnt--;
}
$ln++;
$off = 0;
}
$rest =~ s/\\\n.//g;
$rest =~ s/^\s*//s;
$rest =~ s/\s*$//s;
# Clean up the original statement.
if ($args) {
substr($dstat, 0, length($dcond), '');
} else {
$dstat =~ s/^.\s*\#\s*define\s+$Ident\s*//;
}
$dstat =~ s/$;//g;
$dstat =~ s/\\\n.//g;
$dstat =~ s/^\s*//s;
$dstat =~ s/\s*$//s;
# Flatten any parentheses and braces
while ($dstat =~ s/\([^\(\)]*\)/1/ ||
$dstat =~ s/\{[^\{\}]*\}/1/ ||
$dstat =~ s/\[[^\{\}]*\]/1/)
{
}
my $exceptions = qr{
$Declare|
module_param_named|
MODULE_PARAM_DESC|
DECLARE_PER_CPU|
DEFINE_PER_CPU|
__typeof__\(|
\.$Ident\s*=\s*|
^\"|\"$
}x;
#print "REST<$rest> dstat<$dstat>\n";
if ($rest ne '') {
if ($rest !~ /while\s*\(/ &&
$dstat !~ /$exceptions/)
{
ERROR("Macros with multiple statements should be enclosed in a do - while loop\n" . "$here\n$ctx\n");
}
} elsif ($ctx !~ /;/) {
if ($dstat ne '' &&
$dstat !~ /^(?:$Ident|-?$Constant)$/ &&
$dstat !~ /$exceptions/ &&
$dstat !~ /^\.$Ident\s*=/ &&
$dstat =~ /$Operators/)
{
ERROR("Macros with complex values should be enclosed in parenthesis\n" . "$here\n$ctx\n");
}
}
}
# make sure symbols are always wrapped with VMLINUX_SYMBOL() ...
# all assignments may have only one of the following with an assignment:
# .
# ALIGN(...)
# VMLINUX_SYMBOL(...)
if ($realfile eq 'vmlinux.lds.h' && $line =~ /(?:(?:^|\s)$Ident\s*=|=\s*$Ident(?:\s|$))/) {
WARN("vmlinux.lds.h needs VMLINUX_SYMBOL() around C-visible symbols\n" . $herecurr);
}
# check for redundant bracing round if etc
if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
my ($level, $endln, @chunks) =
ctx_statement_full($linenr, $realcnt, 1);
#print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
#print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
if ($#chunks > 0 && $level == 0) {
my $allowed = 0;
my $seen = 0;
my $herectx = $here . "\n";
my $ln = $linenr - 1;
for my $chunk (@chunks) {
my ($cond, $block) = @{$chunk};
# If the condition carries leading newlines, then count those as offsets.
my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
my $offset = statement_rawlines($whitespace) - 1;
#print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
# We have looked at and allowed this specific line.
$suppress_ifbraces{$ln + $offset} = 1;
$herectx .= "$rawlines[$ln + $offset]\n[...]\n";
$ln += statement_rawlines($block) - 1;
substr($block, 0, length($cond), '');
$seen++ if ($block =~ /^\s*{/);
#print "cond<$cond> block<$block> allowed<$allowed>\n";
if (statement_lines($cond) > 1) {
#print "APW: ALLOWED: cond<$cond>\n";
$allowed = 1;
}
if ($block =~/\b(?:if|for|while)\b/) {
#print "APW: ALLOWED: block<$block>\n";
$allowed = 1;
}
if (statement_block_size($block) > 1) {
#print "APW: ALLOWED: lines block<$block>\n";
$allowed = 1;
}
}
if ($seen && !$allowed) {
WARN("braces {} are not necessary for any arm of this statement\n" . $herectx);
}
}
}
if (!defined $suppress_ifbraces{$linenr - 1} &&
$line =~ /\b(if|while|for|else)\b/) {
my $allowed = 0;
# Check the pre-context.
if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
#print "APW: ALLOWED: pre<$1>\n";
$allowed = 1;
}
my ($level, $endln, @chunks) =
ctx_statement_full($linenr, $realcnt, $-[0]);
# Check the condition.
my ($cond, $block) = @{$chunks[0]};
#print "CHECKING<$linenr> cond<$cond> block<$block>\n";
if (defined $cond) {
substr($block, 0, length($cond), '');
}
if (statement_lines($cond) > 1) {
#print "APW: ALLOWED: cond<$cond>\n";
$allowed = 1;
}
if ($block =~/\b(?:if|for|while)\b/) {
#print "APW: ALLOWED: block<$block>\n";
$allowed = 1;
}
if (statement_block_size($block) > 1) {
#print "APW: ALLOWED: lines block<$block>\n";
$allowed = 1;
}
# Check the post-context.
if (defined $chunks[1]) {
my ($cond, $block) = @{$chunks[1]};
if (defined $cond) {
substr($block, 0, length($cond), '');
}
if ($block =~ /^\s*\{/) {
#print "APW: ALLOWED: chunk-1 block<$block>\n";
$allowed = 1;
}
}
if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
my $herectx = $here . "\n";;
my $cnt = statement_rawlines($block);
for (my $n = 0; $n < $cnt; $n++) {
$herectx .= raw_line($linenr, $n) . "\n";;
}
WARN("braces {} are not necessary for single statement blocks\n" . $herectx);
}
}
# don't include deprecated include files (uses RAW line)
for my $inc (@dep_includes) {
if ($rawline =~ m@^.\s*\#\s*include\s*\<$inc>@) {
ERROR("Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n" . $herecurr);
}
}
# don't use deprecated functions
for my $func (@dep_functions) {
if ($line =~ /\b$func\b/) {
ERROR("Don't use $func(): see Documentation/feature-removal-schedule.txt\n" . $herecurr);
}
}
# no volatiles please
my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
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*\#\s*if\s+0\b/) {
CHK("if this code is redundant consider removing it\n" .
$herecurr);
}
# check for needless kfree() checks
if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
my $expr = $1;
if ($line =~ /\bkfree\(\Q$expr\E\);/) {
WARN("kfree(NULL) is safe this check is probably not required\n" . $hereprev);
}
}
# check for needless usb_free_urb() checks
if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
my $expr = $1;
if ($line =~ /\busb_free_urb\(\Q$expr\E\);/) {
WARN("usb_free_urb(NULL) is safe this check is probably not required\n" . $hereprev);
}
}
# warn about #ifdefs in C files
# if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
# print "#ifdef in C files should be avoided\n";
# print "$herecurr";
# $clean = 0;
# }
# warn about spacing in #ifdefs
if ($line =~ /^.\s*\#\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+;/ ||
$line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
my $which = $1;
if (!ctx_has_comment($first_line, $linenr)) {
CHK("$1 definition without comment\n" . $herecurr);
}
}
# check for memory barriers without a comment.
if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
if (!ctx_has_comment($first_line, $linenr)) {
CHK("memory barrier without comment\n" . $herecurr);
}
}
# check of hardware specific defines
if ($line =~ m@^.\s*\#\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 =~ /\b$Type\s+$Inline\b/ ||
$line =~ /\b$Inline\s+$Storage\b/) {
ERROR("inline keyword should sit between storage class and type\n" . $herecurr);
}
# Check for __inline__ and __inline, prefer inline
if ($line =~ /\b(__inline__|__inline)\b/) {
WARN("plain inline is preferred over $1\n" . $herecurr);
}
# check for new externs in .c files.
if ($realfile =~ /\.c$/ && defined $stat &&
$stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
{
my $function_name = $1;
my $paren_space = $2;
my $s = $stat;
if (defined $cond) {
substr($s, 0, length($cond), '');
}
if ($s =~ /^\s*;/ &&
$function_name ne 'uninitialized_var')
{
WARN("externs should be avoided in .c files\n" . $herecurr);
}
if ($paren_space =~ /\n/) {
WARN("arguments for function declarations should follow identifier\n" . $herecurr);
}
} elsif ($realfile =~ /\.c$/ && defined $stat &&
$stat =~ /^.\s*extern\s+/)
{
WARN("externs should be avoided in .c files\n" . $herecurr);
}
# checks for new __setup's
if ($rawline =~ /\b__setup\("([^"]*)"/) {
my $name = $1;
if (!grep(/$name/, @setup_docs)) {
CHK("__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
}
}
# check for pointless casting of kmalloc return
if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
WARN("unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
}
# check for gcc specific __FUNCTION__
if ($line =~ /__FUNCTION__/) {
WARN("__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
}
# check for semaphores used as mutexes
if ($line =~ /^.\s*(DECLARE_MUTEX|init_MUTEX)\s*\(/) {
WARN("mutexes are preferred for single holder semaphores\n" . $herecurr);
}
# check for semaphores used as mutexes
if ($line =~ /^.\s*init_MUTEX_LOCKED\s*\(/) {
WARN("consider using a completion\n" . $herecurr);
}
# recommend kstrto* over simple_strto*
if ($line =~ /\bsimple_(strto.*?)\s*\(/) {
WARN("consider using kstrto* in preference to simple_$1\n" . $herecurr);
}
# check for __initcall(), use device_initcall() explicitly please
if ($line =~ /^.\s*__initcall\s*\(/) {
WARN("please use device_initcall() instead of __initcall()\n" . $herecurr);
}
# check for struct file_operations, ensure they are const.
if ($line !~ /\bconst\b/ &&
$line =~ /\bstruct\s+(file_operations|seq_operations)\b/) {
WARN("struct $1 should normally be const\n" .
$herecurr);
}
# use of NR_CPUS is usually wrong
# ignore definitions of NR_CPUS and usage to define arrays as likely right
if ($line =~ /\bNR_CPUS\b/ &&
$line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
$line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
$line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
$line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
$line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/)
{
WARN("usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
}
# check for %L{u,d,i} in strings
my $string;
while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
$string = substr($rawline, $-[1], $+[1] - $-[1]);
$string =~ s/%%/__/g;
if ($string =~ /(?<!%)%L[udi]/) {
WARN("\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
last;
}
}
# whine mightly about in_atomic
if ($line =~ /\bin_atomic\s*\(/) {
if ($realfile =~ m@^drivers/@) {
ERROR("do not use in_atomic in drivers\n" . $herecurr);
} elsif ($realfile !~ m@^kernel/@) {
WARN("use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
}
}
}
# If we have no input at all, then there is nothing to report on
# so just keep quiet.
if ($#rawlines == -1) {
exit(0);
}
# In mailback mode only produce a report in the negative, for
# things that appear to be patches.
if ($mailback && ($clean == 1 || !$is_patch)) {
exit(0);
}
# This is not a patch, and we are are in 'no-patch' mode so
# just keep quiet.
if (!$chk_patch && !$is_patch) {
exit(0);
}
if (!$is_patch) {
ERROR("Does not appear to be a unified-diff format patch\n");
}
if ($is_patch && $chk_signoff && $signoff == 0) {
ERROR("Missing Signed-off-by: line(s)\n");
}
print report_dump();
if ($summary && !($clean == 1 && $quiet == 1)) {
print "$filename " if ($summary_file);
print "total: $cnt_error errors, $cnt_warn warnings, " .
(($check)? "$cnt_chk checks, " : "") .
"$cnt_lines lines checked\n";
print "\n" if ($quiet == 0);
}
if ($clean == 1 && $quiet == 0) {
print "$vname has no obvious style problems and is ready for submission.\n"
}
if ($clean == 0 && $quiet == 0) {
print "$vname has style problems, please review. If any of these errors\n";
print "are false positives report them to the maintainer, see\n";
print "CHECKPATCH in MAINTAINERS.\n";
}
return $clean;
}
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