Commit 00df344f authored by Andy Whitcroft's avatar Andy Whitcroft Committed by Linus Torvalds
Browse files

update checkpatch.pl to version 0.04

This version brings a some new tests, and a host of changes to fix
false positives, of particular note:

  - check for and report #if 0
  - extend checking of line lengths and spacing for .pl, .sh etc
  - extends the pointer type checks to multiple levels
  - updates printk handling to track newlines
  - adds a wrapped patch detector
  - drops the leading component of the filenames
  - extends switch indent handling to switch statmentes rooted in
    the context
  - adds foo * bar single pointer checks

This version of checkpatch.pl can be found at the following URL:

      http://www.shadowen.org/~apw/public/checkpatch/checkpatch.pl-0.04



Full Changelog:

Andy Whitcroft (16):
      allow checking line lengths and spacing on other source files
      clean up that whitespace
      sanitise the input line standardising the content of quotes
      clean up pointer type * and space checks
      fix up the sanitiser so it maintains the line length
      apply the printk facility checks only to the first printk in a set
      switch/case indent checks may anchor in the context
      add a wrapped patch detector
      put the #ifdef in C file checks on ice
      asm volatile is acceptable
      check for and report #if 0
      drop the leading component of the filename as patches are -p1
      use the original line when reporting operator errors
      correct spelling of Joel's name
      Version: 0.04
      add support for struct foo * bar checks

Geert Uytterhoeven (1):
      Fix checkpatch.pl name in usage template

Randy Dunlap (1):
      checkpatch: produce fewer lines of output
Signed-off-by: default avatarAndy Whitcroft <apw@shadowen.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent c7909234
#!/usr/bin/perl -w
# (c) 2001, Dave Jones. <davej@codemonkey.org.uk> (the file handling bit)
# (c) 2005, Joel Scohpp <jschopp@austin.ibm.com> (the ugly bit)
# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
# (c) 2007, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite, etc)
# Licensed under the terms of the GNU GPL License version 2
use strict;
my $P = $0;
$P =~ s@.*/@@g;
my $V = '0.03';
my $V = '0.04';
use Getopt::Long qw(:config no_auto_abbrev);
......@@ -26,7 +27,7 @@ GetOptions(
my $exit = 0;
if ($#ARGV < 0) {
print "usage: patchstylecheckemail.pl [options] patchfile\n";
print "usage: $P [options] patchfile\n";
print "version: $V\n";
print "options: -q => quiet\n";
print " --no-tree => run without a kernel tree\n";
......@@ -59,15 +60,15 @@ if ($tree && -f $removal) {
}
}
my @lines = ();
my @rawlines = ();
while (<>) {
chomp;
push(@lines, $_);
push(@rawlines, $_);
if (eof(ARGV)) {
if (!process($ARGV, @lines)) {
if (!process($ARGV, @rawlines)) {
$exit = 1;
}
@lines = ();
@rawlines = ();
}
}
......@@ -118,24 +119,57 @@ sub line_stats {
return (length($line), length($white));
}
sub sanitise_line {
my ($line) = @_;
my $res = '';
my $l = '';
my $quote = '';
foreach my $c (split(//, $line)) {
if ($l ne "\\" && ($c eq "'" || $c eq '"')) {
if ($quote eq '') {
$quote = $c;
$res .= $c;
$l = $c;
next;
} elsif ($quote eq $c) {
$quote = '';
}
}
if ($quote && $c ne "\t") {
$res .= "X";
} else {
$res .= $c;
}
$l = $c;
}
return $res;
}
sub ctx_block_get {
my ($linenr, $remain, $outer) = @_;
my $line;
my $start = $linenr - 1;
my $end = $linenr - 1 + $remain;
my $blk = '';
my @o;
my @c;
my @res = ();
for ($line = $start; $line < $end; $line++) {
$blk .= $lines[$line];
for ($line = $start; $remain > 0; $line++) {
next if ($rawlines[$line] =~ /^-/);
$remain--;
$blk .= $rawlines[$line];
@o = ($blk =~ /\{/g);
@c = ($blk =~ /\}/g);
if (!$outer || (scalar(@o) - scalar(@c)) == 1) {
push(@res, $lines[$line]);
push(@res, $rawlines[$line]);
}
last if (scalar(@o) == scalar(@c));
......@@ -158,7 +192,7 @@ sub ctx_locate_comment {
my ($first_line, $end_line) = @_;
# Catch a comment on the end of the line itself.
my ($current_comment) = ($lines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*$@);
my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*$@);
return $current_comment if (defined $current_comment);
# Look through the context and try and figure out if there is a
......@@ -166,8 +200,8 @@ sub ctx_locate_comment {
my $in_comment = 0;
$current_comment = '';
for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
my $line = $lines[$linenr - 1];
##warn " $line\n";
my $line = $rawlines[$linenr - 1];
#warn " $line\n";
if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
$in_comment = 1;
}
......@@ -190,7 +224,7 @@ sub ctx_has_comment {
my ($first_line, $end_line) = @_;
my $cmt = ctx_locate_comment($first_line, $end_line);
##print "LINE: $lines[$end_line - 1 ]\n";
##print "LINE: $rawlines[$end_line - 1 ]\n";
##print "CMMT: $cmt\n";
return ($cmt ne '');
......@@ -205,10 +239,6 @@ sub cat_vet {
return $vet;
}
sub has_non_quoted {
return ($_[0] =~ m{$_[1]} and $_[0] !~ m{\".*$_[1].*\"});
}
sub process {
my $filename = shift;
my @lines = @_;
......@@ -240,6 +270,7 @@ sub process {
#extract the filename as it passes
if ($line=~/^\+\+\+\s+(\S+)/) {
$realfile=$1;
$realfile =~ s@^[^/]*/@@;
$in_comment = 0;
next;
}
......@@ -262,7 +293,6 @@ sub process {
# blank context lines so we need to count that too.
if ($line =~ /^( |\+|$)/) {
$realline++;
$realcnt-- if ($realcnt != 0);
# track any sort of multi-line comment. Obviously if
# the added text or context do not include the whole
......@@ -288,11 +318,13 @@ sub process {
($prevline, $stashline) = ($stashline, $line);
($previndent, $stashindent) = ($stashindent, $indent);
}
$realcnt-- if ($realcnt != 0);
#make up the handle for any error we report on this line
$here = "#$linenr: ";
$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
my $hereline = "$here\n$line\n";
my $herecurr = "$here\n$line\n\n";
my $hereprev = "$here\n$prevline\n$line\n\n";
......@@ -315,21 +347,28 @@ sub process {
}
}
#ignore lines not being added
if ($line=~/^[^\+]/) {next;}
# Check for wrappage within a valid hunk of the file
if ($realcnt != 0 && $line !~ m{^(?:\+|-| |$)}) {
print "patch seems to be corrupt (line wrapped?) [$realcnt]\n";
print "$herecurr";
$clean = 0;
}
#ignore lines being removed
if ($line=~/^-/) {next;}
# check we are in a valid source file *.[hcsS] if not then ignore this hunk
next if ($realfile !~ /\.[hcsS]$/);
# check we are in a valid source file if not then ignore this hunk
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
#trailing whitespace
if ($line=~/\S\s+$/) {
if ($line=~/\+.*\S\s+$/) {
my $herevet = "$here\n" . cat_vet($line) . "\n\n";
print "trailing whitespace\n";
print "$herevet";
$clean = 0;
}
#80 column limit
if (!($prevline=~/\/\*\*/) && $length > 80) {
if ($line =~ /^\+/ && !($prevline=~/\/\*\*/) && $length > 80) {
print "line over 80 characters\n";
print "$herecurr";
$clean = 0;
......@@ -353,19 +392,59 @@ sub process {
#
next if ($in_comment);
# Remove comments from the line before processing.
$line =~ s@/\*.*\*/@@g;
$line =~ s@/\*.*@@;
$line =~ s@.*\*/@@;
#
# Checks which may be anchored in the context.
#
# Check for switch () and associated case and default
# statements should be at the same indent.
if ($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 '') {
print "switch and case should be at the same indent\n";
print "$here\n$line\n$err\n";
$clean = 0;
}
}
#ignore lines not being added
if ($line=~/^[^\+]/) {next;}
#
# Checks which are anchored on the added line.
#
# no C99 // comments
if (has_non_quoted($line, '//')) {
if ($line =~ m{//}) {
print "do not use C99 // comments\n";
print "$herecurr";
$clean = 0;
}
# Remove comments from the line before processing.
$line =~ s@/\*.*\*/@@g;
$line =~ s@/\*.*@@;
$line =~ s@.*\*/@@;
# Remove C99 comments.
$line =~ s@//.*@@;
# Standardise the strings and chars within the input
# to simplify matching.
$line = sanitise_line($line);
#EXPORT_SYMBOL should immediately follow its function closing }.
if (($line =~ /EXPORT_SYMBOL.*\(.*\)/) ||
($line =~ /EXPORT_UNUSED_SYMBOL.*\(.*\)/)) {
......@@ -393,8 +472,28 @@ sub process {
}
# * goes on variable not on type
if ($line=~/[A-Za-z\d_]+\* [A-Za-z\d_]+/) {
print "\"foo* bar\" should be \"foo *bar\"\n";
my $type = '(?:char|short|int|long|unsigned|float|double|' .
'struct\s+[A-Za-z\d_]+|' .
'union\s+[A-Za-z\d_]+)';
if ($line =~ m{[A-Za-z\d_]+(\*+) [A-Za-z\d_]+}) {
print "\"foo$1 bar\" should be \"foo $1bar\"\n";
print "$herecurr";
$clean = 0;
}
if ($line =~ m{$type (\*) [A-Za-z\d_]+} ||
$line =~ m{[A-Za-z\d_]+ (\*\*+) [A-Za-z\d_]+}) {
print "\"foo $1 bar\" should be \"foo $1bar\"\n";
print "$herecurr";
$clean = 0;
}
if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_](\*+)\)}) {
print "\"(foo$1)\" should be \"(foo $1)\"\n";
print "$herecurr";
$clean = 0;
}
if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_]\s+(\*+)\s+\)}) {
print "\"(foo $1 )\" should be \"(foo $1)\"\n";
print "$herecurr";
$clean = 0;
}
......@@ -406,11 +505,29 @@ sub process {
# $clean = 0;
# }
# printk should use KERN_* levels
# printk should use KERN_* levels. Note that follow on printk's on the
# same line do not need a level, so we use the current block context
# to try and find and validate the current printk. In summary the current
# printk includes all preceeding printk's which have no newline on the end.
# we assume the first bad printk is the one to report.
if ($line =~ /\bprintk\((?!KERN_)/) {
print "printk() should include KERN_ facility level\n";
print "$herecurr";
$clean = 0;
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) {
print "printk() should include KERN_ facility level\n";
print "$herecurr";
$clean = 0;
}
}
#function brace can't be on same line, except for #defines of do while, or if closed on same line
......@@ -425,11 +542,11 @@ sub process {
# will therefore also expand that way.
my $opline = $line;
$opline = expand_tabs($opline);
$opline =~ s/^.//;
$opline =~ s/^./ /;
if (!($line=~/\#\s*include/)) {
# Check operator spacing.
my @elements = split(/(<<=|>>=|<=|>=|==|!=|\+=|-=|\*=|\/=|%=|\^=|\|=|&=|->|<<|>>|<|>|=|!|~|&&|\|\||,|\^|\+\+|--|;|&|\||\+|-|\*|\/\/|\/)/, $opline);
my $off = 1;
my $off = 0;
for (my $n = 0; $n < $#elements; $n += 2) {
$off += length($elements[$n]);
......@@ -452,16 +569,21 @@ sub process {
$c = 'E';
}
# Pick up the preceeding and succeeding characters.
my $ca = substr($opline, $off - 1, 1);
my $cc = '';
if (length($opline) > ($off + length($elements[$n]))) {
$cc = substr($opline, $off + 1 + length($elements[$n]), 1);
}
my $ctx = "${a}x${c}";
my $at = "(ctx:$ctx)";
my $ptr = (" " x $off) . "^";
my $hereptr = "$here\n$line\n$ptr\n\n";
my $hereptr = "$hereline$ptr\n\n";
##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\n";
# Skip things apparently in quotes.
next if ($line=~/\".*\Q$op\E.*\"/ or $line=~/\'\Q$op\E\'/);
# We need ; as an operator. // is a comment.
if ($op eq ';' or $op eq '//') {
......@@ -515,20 +637,26 @@ sub process {
#
# - is the same
#
# * is the same only adding:
# type:
# (foo *)
# (foo **)
#
} elsif ($op eq '&' or $op eq '-') {
if ($ctx !~ /VxV|[EWB]x[WE]|[EWB]x[VO]/) {
if ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]/) {
print "need space before that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# * is the same as & only adding:
# type:
# (foo *)
# (foo **)
#
} elsif ($op eq '*') {
if ($ctx !~ /VxV|[EWB]x[WE]|[EWB]x[VO]|[EWO]x[OBV]/) {
if ($ca eq '*') {
if ($cc =~ /\s/) {
print "no space after that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
} elsif ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]|OxV|WxB/) {
print "need space before that '$op' $at\n";
print "$hereptr";
$clean = 0;
......@@ -578,6 +706,7 @@ sub process {
# Check for illegal assignment in if conditional.
if ($line=~/\b(if|while)\s*\(.*[^<>!=]=[^=].*\)/) {
#next if ($line=~/\".*\Q$op\E.*\"/ or $line=~/\'\Q$op\E\'/);
print "do not use assignment in condition\n";
print "$herecurr";
$clean = 0;
......@@ -592,30 +721,6 @@ sub process {
$clean = 0;
}
# Check for switch () and associated case and default
# statements should be at the same indent.
if ($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 '') {
print "switch and case should be at the same indent\n";
print "$here\n$line\n$err\n";
$clean = 0;
}
}
#studly caps, commented out until figure out how to distinguish between use of existing and adding new
# if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
# print "No studly caps, use _\n";
......@@ -645,12 +750,12 @@ sub process {
my @opened = $prevline=~/\(/g;
my @closed = $prevline=~/\)/g;
my $nr_line = $linenr;
my $remaining = $realcnt;
my $remaining = $realcnt - 1;
my $next_line = $line;
my $extra_lines = 0;
my $display_segment = $prevline;
while ($remaining > 1 && scalar @opened > scalar @closed) {
while ($remaining > 0 && scalar @opened > scalar @closed) {
$prevline .= $next_line;
$display_segment .= "\n" . $next_line;
$next_line = $lines[$nr_line];
......@@ -689,7 +794,7 @@ sub process {
# don't use deprecated functions
for my $func (@dep_functions) {
if (has_non_quoted($line, '\b' . $func . '\b')) {
if ($line =~ /\b$func\b/) {
print "Don't use $func(): see Documentation/feature-removal-schedule.txt\n";
print "$herecurr";
$clean = 0;
......@@ -697,19 +802,26 @@ sub process {
}
# no volatiles please
if (has_non_quoted($line, '\bvolatile\b')) {
if ($line =~ /\bvolatile\b/ && $line !~ /\basm\s+volatile\b/) {
print "Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n";
print "$herecurr";
$clean = 0;
}
# warn about #ifdefs in C files
if ($line =~ /^.#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
print "#ifdef in C files should be avoided\n";
# warn about #if 0
if ($line =~ /^.#\s*if\s+0\b/) {
print "#if 0 -- if this code redundant remove it\n";
print "$herecurr";
$clean = 0;
}
# warn about #ifdefs in C files
# if ($line =~ /^.#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
# print "#ifdef in C files should be avoided\n";
# print "$herecurr";
# $clean = 0;
# }
# check for spinlock_t definitions without a comment.
if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/) {
my $which = $1;
......
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