Commit 13214adf authored by Andy Whitcroft's avatar Andy Whitcroft Committed by Linus Torvalds
Browse files

update checkpatch.pl to version 0.14



This version brings the remainder of the queued fixes.  A number of fixes
for items missed reported by Andrew Morton and others.  Also a handful
of new checks and fixes for false positives.  Of note:

 - new warning associated with --file to try and avoid cleanup only patches,
 - corrected handling of completly empty files,
 - corrected report handling with multiple files,
 - handling of possible types in the face of multiple declarations,
 - detection of unnessary braces on complex if statements (where present), and
 - all new comment spacing handling.

Andi Kleen (1):
      Introduce a warning when --file mode is used

Andy Whitcroft (14):
      Version: 0.14
      clean up some space violations in checkpatch.pl
      a completly empty file should not provoke a whinge
      reset report lines buffers between files
      unary ++/-- may abutt close braces
      __typeof__ is also unary
      comments: revamp comment handling
      add --summary-file option adding filename to summary line
      trailing backslashes are not trailing statements
      handle operators passed as parameters such as to ASSERTCMP
      possible types -- enhance debugging
      check for boolean operations with constants
      possible types: handle multiple declarations
      detect and report if statements where all branches are single statements

Arjan van de Ven (1):
      quiet option should not print the summary on no errors

Bartlomiej Zolnierkiewicz (1):
      warn about using __FUNCTION__

Timur Tabi (1):
      loosen spacing checks for __asm__
Signed-off-by: default avatarAndy Whitcroft <apw@shadowen.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 24649c00
......@@ -9,7 +9,7 @@ use strict;
my $P = $0;
$P =~ s@.*/@@g;
my $V = '0.13';
my $V = '0.14';
use Getopt::Long qw(:config no_auto_abbrev);
......@@ -24,6 +24,7 @@ my $file = 0;
my $check = 0;
my $summary = 1;
my $mailback = 0;
my $summary_file = 0;
my $root;
my %debug;
GetOptions(
......@@ -31,7 +32,6 @@ GetOptions(
'tree!' => \$tree,
'signoff!' => \$chk_signoff,
'patch!' => \$chk_patch,
'test-type!' => \$tst_type,
'emacs!' => \$emacs,
'terse!' => \$terse,
'file!' => \$file,
......@@ -40,7 +40,10 @@ GetOptions(
'root=s' => \$root,
'summary!' => \$summary,
'mailback!' => \$mailback,
'summary-file!' => \$summary_file,
'debug=s' => \%debug,
'test-type!' => \$tst_type,
) or exit;
my $exit = 0;
......@@ -48,13 +51,15 @@ my $exit = 0;
if ($#ARGV < 0) {
print "usage: $P [options] patchfile\n";
print "version: $V\n";
print "options: -q => quiet\n";
print " --no-tree => run without a kernel tree\n";
print " --terse => one line per report\n";
print " --emacs => emacs compile window format\n";
print " --file => check a source file\n";
print " --strict => enable more subjective tests\n";
print " --root => path to the kernel tree root\n";
print "options: -q => quiet\n";
print " --no-tree => run without a kernel tree\n";
print " --terse => one line per report\n";
print " --emacs => emacs compile window format\n";
print " --file => check a source file\n";
print " --strict => enable more subjective tests\n";
print " --root => path to the kernel tree root\n";
print " --no-summary => suppress the per-file summary\n";
print " --summary-file => include the filename in summary\n";
exit(1);
}
......@@ -213,6 +218,7 @@ for my $filename (@ARGV) {
$exit = 1;
}
@rawlines = ();
@lines = ();
}
exit($exit);
......@@ -321,14 +327,14 @@ sub sanitise_line {
}
# Clear out the comments.
while ($res =~ m@(/\*.*?\*/)@) {
substr($res, $-[1], $+[1] - $-[1]) = ' ' x ($+[1] - $-[1]);
while ($res =~ m@(/\*.*?\*/)@g) {
substr($res, $-[1], $+[1] - $-[1]) = $; x ($+[1] - $-[1]);
}
if ($res =~ m@(/\*.*)@) {
substr($res, $-[1], $+[1] - $-[1]) = ' ' x ($+[1] - $-[1]);
substr($res, $-[1], $+[1] - $-[1]) = $; x ($+[1] - $-[1]);
}
if ($res =~ m@^.(.*\*/)@) {
substr($res, $-[1], $+[1] - $-[1]) = ' ' x ($+[1] - $-[1]);
substr($res, $-[1], $+[1] - $-[1]) = $; x ($+[1] - $-[1]);
}
# The pathname on a #include may be surrounded by '<' and '>'.
......@@ -352,10 +358,14 @@ sub ctx_statement_block {
my $soff = $off;
my $coff = $off - 1;
my $loff = 0;
my $type = '';
my $level = 0;
my $c;
my $len = 0;
my $remainder;
while (1) {
#warn "CSB: blk<$blk>\n";
# If we are about to drop off the end, pull in more
......@@ -364,6 +374,7 @@ sub ctx_statement_block {
for (; $remain > 0; $line++) {
next if ($lines[$line] =~ /^-/);
$remain--;
$loff = $len;
$blk .= $lines[$line] . "\n";
$len = length($blk);
$line++;
......@@ -371,11 +382,12 @@ sub ctx_statement_block {
}
# Bail if there is no further context.
#warn "CSB: blk<$blk> off<$off> len<$len>\n";
if ($off == $len) {
if ($off >= $len) {
last;
}
}
$c = substr($blk, $off, 1);
$remainder = substr($blk, $off);
#warn "CSB: c<$c> type<$type> level<$level>\n";
# Statement ends at the ';' or a close '}' at the
......@@ -384,6 +396,12 @@ sub ctx_statement_block {
last;
}
# An else is really a conditional as long as its not else if
if ($level == 0 && $remainder =~ /(\s+else)(?:\s|{)/ &&
$remainder !~ /\s+else\s+if\b/) {
$coff = $off + length($1);
}
if (($type eq '' || $type eq '(') && $c eq '(') {
$level++;
$type = '(';
......@@ -410,6 +428,10 @@ sub ctx_statement_block {
}
$off++;
}
if ($off == $len) {
$line++;
$remain--;
}
my $statement = substr($blk, $soff, $off - $soff + 1);
my $condition = substr($blk, $soff, $coff - $soff + 1);
......@@ -417,7 +439,30 @@ sub ctx_statement_block {
#warn "STATEMENT<$statement>\n";
#warn "CONDITION<$condition>\n";
return ($statement, $condition);
#print "off<$off> loff<$loff>\n";
return ($statement, $condition,
$line, $remain + 1, $off - $loff + 1, $level);
}
sub ctx_statement_full {
my ($linenr, $remain, $off) = @_;
my ($statement, $condition, $level);
my (@chunks);
($statement, $condition, $linenr, $remain, $off, $level) =
ctx_statement_block($linenr, $remain, $off);
#print "F: c<$condition> s<$statement>\n";
for (;;) {
push(@chunks, [ $condition, $statement ]);
last if (!($remain > 0 && $condition =~ /^.\s*(?:if|else|do)/));
($statement, $condition, $linenr, $remain, $off, $level) =
ctx_statement_block($linenr, $remain, $off);
#print "C: c<$condition> s<$statement>\n";
}
return ($level, $linenr, @chunks);
}
sub ctx_block_get {
......@@ -598,7 +643,7 @@ sub annotate_values {
}
$type = 'N';
} elsif ($cur =~ /^(if|while|typeof|for)\b/o) {
} elsif ($cur =~ /^(if|while|typeof|__typeof__|for)\b/o) {
print "COND($1)\n" if ($dbg_values > 1);
$av_paren_type[$av_paren] = 'N';
$type = 'N';
......@@ -635,8 +680,12 @@ sub annotate_values {
print "ASSIGN($1)\n" if ($dbg_values > 1);
$type = 'N';
} elsif ($cur =~ /^(;|{|}|\?|:|\[)/o) {
} elsif ($cur =~/^(;)/) {
print "END($1)\n" if ($dbg_values > 1);
$type = 'E';
} elsif ($cur =~ /^(;|{|}|\?|:|\[)/o) {
print "CLOSE($1)\n" if ($dbg_values > 1);
$type = 'N';
} elsif ($cur =~ /^($Operators)/o) {
......@@ -658,7 +707,7 @@ sub annotate_values {
}
sub possible {
my ($possible) = @_;
my ($possible, $line) = @_;
#print "CHECK<$possible>\n";
if ($possible !~ /^(?:$Storage|$Type|DEFINE_\S+)$/ &&
......@@ -666,7 +715,7 @@ sub possible {
$possible ne 'struct' && $possible ne 'enum' &&
$possible ne 'case' && $possible ne 'else' &&
$possible ne 'typedef') {
warn "POSSIBLE: $possible\n" if ($dbg_possible);
warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
push(@typeList, $possible);
build_types();
}
......@@ -674,16 +723,15 @@ sub possible {
my $prefix = '';
my @report = ();
sub report {
my $line = $prefix . $_[0];
$line = (split('\n', $line))[0] . "\n" if ($terse);
push(@report, $line);
push(our @report, $line);
}
sub report_dump {
@report;
our @report;
}
sub ERROR {
report("ERROR: $_[0]\n");
......@@ -721,6 +769,7 @@ sub process {
my $signoff = 0;
my $is_patch = 0;
our @report = ();
our $cnt_lines = 0;
our $cnt_error = 0;
our $cnt_warn = 0;
......@@ -735,7 +784,10 @@ sub process {
my $comment_edge = 0;
my $first_line = 0;
my $prev_values = 'N';
my $prev_values = 'E';
# suppression flags
my $suppress_ifbraces = 0;
# Pre-scan the patch sanitizing the lines.
# Pre-scan the patch looking for any __setup documentation.
......@@ -791,7 +843,9 @@ sub process {
$realcnt=1+1;
}
annotate_reset();
$prev_values = 'N';
$prev_values = 'E';
$suppress_ifbraces = $linenr - 1;
next;
}
......@@ -953,22 +1007,22 @@ sub process {
# definitions in global scope can only start with types
} elsif ($line =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b/) {
possible($1);
possible($1, $line);
# declarations always start with types
} elsif ($prev_values eq 'N' && $line =~ /^.\s*(?:$Storage\s+)?(?:const\s+)?($Ident)\b(:?\s+$Sparse)?\s*\**\s*$Ident\s*(?:;|=)/) {
} elsif ($prev_values eq 'E' && $line =~ /^.\s*(?:$Storage\s+)?(?:const\s+)?($Ident)\b(:?\s+$Sparse)?\s*\**\s*$Ident\s*(?:;|=|,)/) {
possible($1);
}
# any (foo ... *) is a pointer cast, and foo is a type
while ($line =~ /\(($Ident)(?:\s+$Sparse)*\s*\*+\s*\)/g) {
possible($1);
possible($1, $line);
}
# Check for any sort of function declaration.
# int foo(something bar, other baz);
# void (*store_gdt)(x86_descr_ptr *);
if ($prev_values eq 'N' && $line =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/) {
if ($prev_values eq 'E' && $line =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/) {
my ($name_len) = length($1);
my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, $name_len);
my $ctx = join("\n", @ctx);
......@@ -979,7 +1033,7 @@ sub process {
for my $arg (split(/\s*,\s*/, $ctx)) {
if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/ || $arg =~ /^($Ident)$/) {
possible($1);
possible($1, $line);
}
}
}
......@@ -1189,7 +1243,7 @@ sub process {
my $ctx = substr($line, 0, $-[1]);
# Ignore those directives where spaces _are_ permitted.
if ($name =~ /^(?:if|for|while|switch|return|volatile|__volatile__|__attribute__|format|__extension__|Copyright|case)$/) {
if ($name =~ /^(?:if|for|while|switch|return|volatile|__volatile__|__attribute__|format|__extension__|Copyright|case|__asm__)$/) {
# cpp #define statements have non-optional spaces, ie
# if there is a space between the name and the open
......@@ -1212,7 +1266,7 @@ sub process {
=>|->|<<|>>|<|>|=|!|~|
&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
}x;
my @elements = split(/($ops|;)/, $opline);
my @elements = split(/($;+|$ops|;)/, $opline);
my $off = 0;
my $blank = copy_spacing($opline);
......@@ -1272,8 +1326,15 @@ sub process {
# print "UNARY: <$op_left$op_type $is_unary $a:$op:$c> <$ca:$op:$cc> <$unary_ctx>\n";
#}
# Ignore operators passed as parameters.
if ($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
if ($op eq ';') {
} elsif ($op eq ';') {
if ($ctx !~ /.x[WEB]/ && $cc !~ /^\\/ &&
$cc !~ /^;/) {
ERROR("need space after that '$op' $at\n" . $hereptr);
......@@ -1315,7 +1376,7 @@ sub process {
if ($ctx !~ /[WOB]x[^W]/ && $ctx !~ /[^W]x[WOBE]/) {
ERROR("need space one side of that '$op' $at\n" . $hereptr);
}
if ($ctx =~ /Wx./ && $cc =~ /^;/) {
if ($ctx =~ /WxB/ || ($ctx =~ /Wx./ && $cc =~ /^;/)) {
ERROR("no space before that '$op' $at\n" . $hereptr);
}
......@@ -1388,7 +1449,7 @@ sub process {
$line !~ /for\s*\(\s+;/) {
ERROR("no space after that open parenthesis '('\n" . $herecurr);
}
if ($line =~ /\s\)/ && $line !~ /^.\s*\)/ &&
if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
$line !~ /for\s*\(.*;\s+\)/) {
ERROR("no space before that close parenthesis ')'\n" . $herecurr);
}
......@@ -1416,16 +1477,34 @@ sub process {
# conditional.
substr($s, 0, length($c)) = '';
$s =~ s/\n.*//g;
if (length($c) && $s !~ /^\s*({|;|\/\*.*\*\/)?\s*\\*\s*$/) {
$s =~ s/$;//g; # Remove any comments
if (length($c) && $s !~ /^\s*({|;|)\s*\\*\s*$/) {
ERROR("trailing statements should be on next line\n" . $herecurr);
}
}
# Check for bitwise tests written as boolean
if ($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(.*)/ &&
$1 !~ /^\s*(?:\sif|{|\\|$)/) {
ERROR("trailing statements should be on next line\n" . $herecurr);
if ($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" . $herecurr);
}
}
# Check for }<nl>else {, these must be at the same
......@@ -1518,7 +1597,48 @@ sub process {
}
# check for redundant bracing round if etc
if ($line =~ /\b(if|while|for|else)\b/) {
if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
my ($level, $endln, @chunks) =
ctx_statement_full($linenr, $realcnt, 0);
#print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
if ($#chunks > 1 && $level == 0) {
my $allowed = 0;
my $seen = 0;
for my $chunk (@chunks) {
my ($cond, $block) = @{$chunk};
substr($block, 0, length($cond)) = '';
$seen++ if ($block =~ /^\s*{/);
$block =~ s/(^|\n)./$1/g;
$block =~ s/^\s*{//;
$block =~ s/}\s*$//;
$block =~ s/^\s*//;
$block =~ s/\s*$//;
my @lines = ($block =~ /\n/g);
my @statements = ($block =~ /;/g);
#print "cond<$cond> block<$block> lines<" . scalar(@lines) . "> statements<" . scalar(@statements) . "> seen<$seen> allowed<$allowed>\n";
if (scalar(@lines) != 0) {
$allowed = 1;
}
if ($block =~/\b(?:if|for|while)\b/) {
$allowed = 1;
}
if (scalar(@statements) > 1) {
$allowed = 1;
}
}
if ($seen && !$allowed) {
WARN("braces {} are not necessary for any arm of this statement\n" . $herecurr);
$suppress_ifbraces = $endln;
}
}
}
if ($linenr > $suppress_ifbraces &&
$line =~ /\b(if|while|for|else)\b/) {
# Locate the end of the opening statement.
my @control = ctx_statement($linenr, $realcnt, 0);
my $nr = $linenr + (scalar(@control) - 1);
......@@ -1541,7 +1661,7 @@ sub process {
my $after = $1;
#print "block<" . join(' ', @block) . "><" . scalar(@block) . ">\n";
#print "stmt<$stmt>\n\n";
#print "before<$before> stmt<$stmt> after<$after>\n\n";
# Count the newlines, if there is only one
# then the block should not have {}'s.
......@@ -1659,6 +1779,17 @@ sub process {
if ($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" . $herecurr);
}
}
# If we have no input at all, then there is nothing to report on
# so just keep quiet.
if ($#rawlines == -1) {
exit(0);
}
# In mailback mode only produce a report in the negative, for
......@@ -1681,7 +1812,8 @@ sub process {
}
print report_dump();
if ($summary) {
if ($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";
......@@ -1696,5 +1828,15 @@ sub process {
print "are false positives report them to the maintainer, see\n";
print "CHECKPATCH in MAINTAINERS.\n";
}
print <<EOL if ($file == 1 && $quiet == 0);
WARNING: Using --file mode. Please do not send patches to linux-kernel
that change whole existing files if you did not significantly change most
of the the file for other reasons anyways or just wrote the file newly
from scratch. Pure code style patches have a significant cost in a
quickly changing code base like Linux because they cause rejects
with other changes.
EOL
return $clean;
}
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