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authorAndy Whitcroft <apw@canonical.com>2012-01-10 15:09:54 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 16:30:50 -0800
commitf74bd1942e04a0cedd1e9c8b331141e75add49c0 (patch)
tree76e1f8b1fdf0c1be748304d14f9aed353932fc26 /scripts
parent5f14d3bd87ef5f979ea64c1f0862534d71786db7 (diff)
downloadlinux-linaro-stable-f74bd1942e04a0cedd1e9c8b331141e75add49c0.tar.gz
checkpatch: correctly track the end of preprocessor commands in context
When looking for a statement we currently run on through preprocessor commands. This means that a header file with just definitions is parsed over and over again combining all of the lines from the current line to the end of file leading to severe performance issues. Fix up context accumulation to track preprocessor commands and stop when reaching the end of them. At the same time vastly simplify the #define handling. Signed-off-by: Andy Whitcroft <apw@canonical.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/checkpatch.pl90
1 files changed, 39 insertions, 51 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e94626ca77cf..06e22caa5692 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -676,6 +676,10 @@ sub ctx_statement_block {
if ($off >= $len) {
last;
}
+ if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) {
+ $level++;
+ $type = '#';
+ }
}
$p = $c;
$c = substr($blk, $off, 1);
@@ -738,6 +742,13 @@ sub ctx_statement_block {
last;
}
}
+ # Preprocessor commands end at the newline unless escaped.
+ if ($type eq '#' && $c eq "\n" && $p ne "\\") {
+ $level--;
+ $type = '';
+ $off++;
+ last;
+ }
$off++;
}
# We are truly at the end, so shuffle to the next line.
@@ -1801,6 +1812,8 @@ sub process {
$stat =~ s/\n./\n /g;
$cond =~ s/\n./\n /g;
+#print "stat<$stat>\n";
+
# Find the real next line.
$realline_next = $line_nr_next;
if (defined $realline_next &&
@@ -2781,47 +2794,13 @@ sub process {
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 - $linenr + 1, 0);
+ ctx_statement_block($linenr, $realcnt, 0);
+ $ctx = $dstat;
#print "dstat<$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*//;
- }
+ $dstat =~ s/^.\s*\#\s*define\s+$Ident(?:\([^\)]*\))?\s*//;
$dstat =~ s/$;//g;
$dstat =~ s/\\\n.//g;
$dstat =~ s/^\s*//s;
@@ -2847,23 +2826,32 @@ sub process {
^\"|\"$
}x;
#print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
- if ($rest ne '' && $rest ne ',') {
- if ($rest !~ /while\s*\(/ &&
- $dstat !~ /$exceptions/)
- {
- ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
- "Macros with multiple statements should be enclosed in a do - while loop\n" . "$here\n$ctx\n");
+ if ($dstat ne '' &&
+ $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(),
+ $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo();
+ $dstat !~ /^(?:$Ident|-?$Constant)$/ && # 10 // foo()
+ $dstat !~ /$exceptions/ &&
+ $dstat !~ /^\.$Ident\s*=/ && # .foo =
+ $dstat !~ /^do\s*$Constant\s*while\s*$Constant;$/ && # do {...} while (...);
+ $dstat !~ /^for\s*$Constant$/ && # for (...)
+ $dstat !~ /^for\s*$Constant\s+(?:$Ident|-?$Constant)$/ && # for (...) bar()
+ $dstat !~ /^do\s*{/ && # do {...
+ $dstat !~ /^\({/) # ({...
+ {
+ $ctx =~ s/\n*$//;
+ my $herectx = $here . "\n";
+ my $cnt = statement_rawlines($ctx);
+
+ for (my $n = 0; $n < $cnt; $n++) {
+ $herectx .= raw_line($linenr, $n) . "\n";
}
- } elsif ($ctx !~ /;/) {
- if ($dstat ne '' &&
- $dstat !~ /^(?:$Ident|-?$Constant)$/ &&
- $dstat !~ /$exceptions/ &&
- $dstat !~ /^\.$Ident\s*=/ &&
- $dstat =~ /$Operators/)
- {
+ if ($dstat =~ /;/) {
+ ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
+ "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
+ } else {
ERROR("COMPLEX_MACRO",
- "Macros with complex values should be enclosed in parenthesis\n" . "$here\n$ctx\n");
+ "Macros with complex values should be enclosed in parenthesis\n" . "$herectx");
}
}
}