137d1b2b4c
Software security is an important issue, in general, but it is
especially important in Linux kernel code. Buffer overflows can have
wide-reaching ramifications and can often be readily exploited to
compromise the entire system. It is important for every developer to
be aware of security issues while writing code.
However, I've noticed a few "rules" about coding that are resulting in
code that isn't any more secure, and has the disadvantage of obscuring
what the code is doing. In most instances, the "corrected" code is
actually wrong: we've traded a perceived lack of safety for incorrect
behavior. These obfuscations also make this code more distant from
upstream kernel standards.
I'm only going to focus here on strcmp/strncmp and strlen/strnlen. I
choose these two, because in the context of the kernel, it's not easy
to make a general rule, such as "always use the 'n' variant". These
function have different behavior, and the 'n' isn't just a blanket fix
that makes them better. In many instances, the correct call is the
plain variant (strcpy has a strlcpy variant which is usually helpful).
Let's start with strlen/strnlen.
size_t strlen(const char *);
size_t strnlen(const char *, size_t);
The strlen() function scans for a NUL byte within a string, and
returns the number of characters that had to be skipped to get there.
The strnlen() call is similar, but will stop after after a maximal
number of characters, and return that result. This variant was
intended for storing variable length strings in fixed-sized buffers,
where the full-length case did not have a trailing NUL. This storage
model is very uncommon, as is the use of strnlen().
The question becomes, what is the maximal length you should be giving
to strnlen(). If the string is truly variable length (allocated and
filled), there really isn't a meaningful value to use for this. The
only time that a max length makes sense is when you have something
like:
char name[MAX_NAME_LENGTH];
but, in this case, strnlen() is still probably not what you want to be
using. It would be safe to use, if you check the result, and if it is
MAX_NAME_LENGTH, raise some kind of error case. If later code assumes
there is a NUL at the end, there will still be a buffer overflow. In
this case, it is much better to check the length before storing it in
this field, and make sure there is room for the NUL.
If the string is a constant, passing in a length doesn't make sense,
since you would have to know the length of the string to check that.
There is no safety issue with calling strlen() on a constant.
So, the simple rule for strnlen()/strlen() is:
- If the string doesn't have an obvious bound length, such as an
allocated string, use strlen().
- If the string is a constant, use strlen().
- If there is a fixed buffer, strnlen() might make sense, but it is
probably better to change the design to avoid these types of
strings.
The only case where strnlen really makes sense is when you have a
string that is passed in from the user. In this case, it is very
important to check the result, and if the length is at the maximum,
return an error, and don't try to do any processing on the string.
Moving on to strcmp/strncmp. These functions are similar, except that
they take two string arguments, which gives a lot more combinations.
int strcmp(const char *, const char *);
int strncmp(const char *, const char *, size_t);
These will walk both strings (at the same time), and stop when
reaching the first difference between them. This means that they will
never go further than the length of the shortest string being
compared. As in strnlen, the max argument to strncmp sets a limit on
the comparison. Similar to strnlen, the results are unusual when the
limit is reached, but in a sense, even worse, since it may consider
the strings equal without ever reaching the end of either.
Looking over the 200 some uses of strncmp in the msm code, almost all
of them do something akin to:
strncmp(value, constant, strlen(constant))
If the call has added 1 to the 'strlen' result, the strncmp would just
become an inefficient, but otherwise identical version of strcmp.
However, without the +1, this compares the prefix of 'value' instead
of the entire string. Only one instance of strncmp in the code
appears to be intentionally checking for a prefix. The rest have
changed a simple string compare into an unintentional prefix match.
Because there are two strings, it is a little more complex to
determine which to use, but it is very similar. It might seem that
strncmp() would be useful for checking an unknown buffer (say from
userspace). However, since strncmp()'s result doesn't distinguish
between finding the end of the string, or hitting the max, there's no
way to know. Some guidelines:
- If one of the strings has a known bound length (such as a
constant, or another string whose length has already been
checked), AND this bound length is within the expected buffer of
the other string, it is safe to use strcmp().
- Otherwise, you may need to use something like strnlen() to
determine a maximum length before calling strcmp().
- strncmp() is useful to test a string for a prefix. No other uses
make sense.
To facilitate fixing these, remove strlen(), strcmp(), and
strcasecmp() from the list of calls that are banned. Problems with
these calls need to be caught at a higher level (such as review), and
replacing them with the 'n' variants doesn't help anything.
This will be followed by some patches that fixup the incorrect code
introduced by this "ban".
Change-Id: I77dfe1f2f58e8c951e4b38b23f4ec79f8209b1dc
Signed-off-by: David Brown <davidb@codeaurora.org>
3822 lines
104 KiB
Prolog
Executable File
3822 lines
104 KiB
Prolog
Executable File
#!/usr/bin/perl -w
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# (c) 2001, Dave Jones. (the file handling bit)
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# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
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# (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
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# (c) 2008-2010 Andy Whitcroft <apw@canonical.com>
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# Licensed under the terms of the GNU GPL License version 2
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use strict;
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use constant BEFORE_SHORTTEXT => 0;
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use constant IN_SHORTTEXT_BLANKLINE => 1;
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use constant IN_SHORTTEXT => 2;
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use constant AFTER_SHORTTEXT => 3;
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use constant CHECK_NEXT_SHORTTEXT => 4;
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use constant SHORTTEXT_LIMIT => 75;
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my $P = $0;
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$P =~ s@.*/@@g;
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my $V = '0.32';
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use Getopt::Long qw(:config no_auto_abbrev);
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my $quiet = 0;
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my $tree = 1;
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my $chk_signoff = 1;
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my $chk_patch = 1;
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my $tst_only;
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my $emacs = 0;
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my $terse = 0;
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my $file = 0;
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my $check = 0;
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my $summary = 1;
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my $mailback = 0;
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my $summary_file = 0;
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my $show_types = 0;
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my $root;
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my %debug;
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my %ignore_type = ();
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my @ignore = ();
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my $help = 0;
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my $configuration_file = ".checkpatch.conf";
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sub help {
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my ($exitcode) = @_;
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print << "EOM";
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Usage: $P [OPTION]... [FILE]...
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Version: $V
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Options:
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-q, --quiet quiet
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--no-tree run without a kernel tree
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--no-signoff do not check for 'Signed-off-by' line
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--patch treat FILE as patchfile (default)
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--emacs emacs compile window format
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--terse one line per report
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-f, --file treat FILE as regular source file
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--subjective, --strict enable more subjective tests
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--ignore TYPE(,TYPE2...) ignore various comma separated message types
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--show-types show the message "types" in the output
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--root=PATH PATH to the kernel tree root
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--no-summary suppress the per-file summary
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--mailback only produce a report in case of warnings/errors
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--summary-file include the filename in summary
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--debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of
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'values', 'possible', 'type', and 'attr' (default
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is all off)
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--test-only=WORD report only warnings/errors containing WORD
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literally
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-h, --help, --version display this help and exit
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When FILE is - read standard input.
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EOM
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exit($exitcode);
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}
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my $conf = which_conf($configuration_file);
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if (-f $conf) {
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my @conf_args;
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open(my $conffile, '<', "$conf")
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or warn "$P: Can't find a readable $configuration_file file $!\n";
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while (<$conffile>) {
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my $line = $_;
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$line =~ s/\s*\n?$//g;
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$line =~ s/^\s*//g;
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$line =~ s/\s+/ /g;
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next if ($line =~ m/^\s*#/);
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next if ($line =~ m/^\s*$/);
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my @words = split(" ", $line);
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foreach my $word (@words) {
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last if ($word =~ m/^#/);
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push (@conf_args, $word);
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}
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}
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close($conffile);
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unshift(@ARGV, @conf_args) if @conf_args;
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}
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GetOptions(
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'q|quiet+' => \$quiet,
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'tree!' => \$tree,
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'signoff!' => \$chk_signoff,
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'patch!' => \$chk_patch,
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'emacs!' => \$emacs,
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'terse!' => \$terse,
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'f|file!' => \$file,
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'subjective!' => \$check,
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'strict!' => \$check,
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'ignore=s' => \@ignore,
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'show-types!' => \$show_types,
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'root=s' => \$root,
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'summary!' => \$summary,
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'mailback!' => \$mailback,
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'summary-file!' => \$summary_file,
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'debug=s' => \%debug,
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'test-only=s' => \$tst_only,
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'h|help' => \$help,
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'version' => \$help
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) or help(1);
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help(0) if ($help);
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my $exit = 0;
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if ($#ARGV < 0) {
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print "$P: no input files\n";
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exit(1);
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}
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@ignore = split(/,/, join(',',@ignore));
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foreach my $word (@ignore) {
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$word =~ s/\s*\n?$//g;
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$word =~ s/^\s*//g;
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$word =~ s/\s+/ /g;
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$word =~ tr/[a-z]/[A-Z]/;
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next if ($word =~ m/^\s*#/);
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next if ($word =~ m/^\s*$/);
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$ignore_type{$word}++;
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}
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my $dbg_values = 0;
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my $dbg_possible = 0;
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my $dbg_type = 0;
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my $dbg_attr = 0;
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for my $key (keys %debug) {
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## no critic
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eval "\${dbg_$key} = '$debug{$key}';";
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die "$@" if ($@);
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}
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my $rpt_cleaners = 0;
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if ($terse) {
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$emacs = 1;
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$quiet++;
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}
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if ($tree) {
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if (defined $root) {
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if (!top_of_kernel_tree($root)) {
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die "$P: $root: --root does not point at a valid tree\n";
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}
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} else {
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if (top_of_kernel_tree('.')) {
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$root = '.';
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} elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
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top_of_kernel_tree($1)) {
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$root = $1;
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}
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}
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if (!defined $root) {
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print "Must be run from the top-level dir. of a kernel tree\n";
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exit(2);
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}
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}
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my $emitted_corrupt = 0;
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our $Ident = qr{
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[A-Za-z_][A-Za-z\d_]*
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(?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
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}x;
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our $Storage = qr{extern|static|asmlinkage};
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our $Sparse = qr{
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__user|
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__kernel|
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__force|
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__iomem|
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__must_check|
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__init_refok|
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__kprobes|
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__ref|
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__rcu
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}x;
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# Notes to $Attribute:
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# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
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our $Attribute = qr{
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const|
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__percpu|
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__nocast|
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__safe|
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__bitwise__|
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__packed__|
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__packed2__|
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__naked|
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__maybe_unused|
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__always_unused|
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__noreturn|
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__used|
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__cold|
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__noclone|
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__deprecated|
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__read_mostly|
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__kprobes|
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__(?:mem|cpu|dev|)(?:initdata|initconst|init\b)|
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____cacheline_aligned|
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____cacheline_aligned_in_smp|
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____cacheline_internodealigned_in_smp|
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__weak
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}x;
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our $Modifier;
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our $Inline = qr{inline|__always_inline|noinline};
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our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
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our $Lval = qr{$Ident(?:$Member)*};
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our $Constant = qr{(?i:(?:[0-9]+|0x[0-9a-f]+)[ul]*)};
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our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
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our $Compare = qr{<=|>=|==|!=|<|>};
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our $Operators = qr{
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<=|>=|==|!=|
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=>|->|<<|>>|<|>|!|~|
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&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
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}x;
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our $NonptrType;
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our $Type;
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our $Declare;
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our $NON_ASCII_UTF8 = qr{
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[\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
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| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
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| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
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| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
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| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
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| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
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| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
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}x;
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our $UTF8 = qr{
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[\x09\x0A\x0D\x20-\x7E] # ASCII
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| $NON_ASCII_UTF8
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}x;
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our $typeTypedefs = qr{(?x:
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(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
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atomic_t
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)};
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our $logFunctions = qr{(?x:
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printk(?:_ratelimited|_once|)|
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[a-z0-9]+_(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)|
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WARN(?:_RATELIMIT|_ONCE|)|
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panic|
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MODULE_[A-Z_]+
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)};
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our $signature_tags = qr{(?xi:
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Signed-off-by:|
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Acked-by:|
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Tested-by:|
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Reviewed-by:|
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Reported-by:|
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To:|
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Cc:
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)};
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our @typeList = (
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qr{void},
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qr{(?:unsigned\s+)?char},
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qr{(?:unsigned\s+)?short},
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qr{(?:unsigned\s+)?int},
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qr{(?:unsigned\s+)?long},
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qr{(?:unsigned\s+)?long\s+int},
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qr{(?:unsigned\s+)?long\s+long},
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qr{(?:unsigned\s+)?long\s+long\s+int},
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qr{unsigned},
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qr{float},
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qr{double},
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qr{bool},
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qr{struct\s+$Ident},
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qr{union\s+$Ident},
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qr{enum\s+$Ident},
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qr{${Ident}_t},
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qr{${Ident}_handler},
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qr{${Ident}_handler_fn},
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);
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our @modifierList = (
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qr{fastcall},
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);
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our $allowed_asm_includes = qr{(?x:
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irq|
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memory
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)};
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# memory.h: ARM has a custom one
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sub build_types {
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my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
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my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)";
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$Modifier = qr{(?:$Attribute|$Sparse|$mods)};
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$NonptrType = qr{
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(?:$Modifier\s+|const\s+)*
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(?:
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(?:typeof|__typeof__)\s*\([^\)]*\)|
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(?:$typeTypedefs\b)|
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(?:${all}\b)
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)
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(?:\s+$Modifier|\s+const)*
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}x;
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$Type = qr{
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$NonptrType
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(?:(?:\s|\*|\[\])+\s*const|(?:\s|\*|\[\])+|(?:\s*\[\s*\])+)?
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(?:\s+$Inline|\s+$Modifier)*
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}x;
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$Declare = qr{(?:$Storage\s+)?$Type};
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}
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build_types();
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our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*};
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# Using $balanced_parens, $LvalOrFunc, or $FuncArg
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# requires at least perl version v5.10.0
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# Any use must be runtime checked with $^V
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our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/;
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our $LvalOrFunc = qr{($Lval)\s*($balanced_parens{0,1})\s*};
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our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant)};
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sub deparenthesize {
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my ($string) = @_;
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return "" if (!defined($string));
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$string =~ s@^\s*\(\s*@@g;
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$string =~ s@\s*\)\s*$@@g;
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$string =~ s@\s+@ @g;
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return $string;
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}
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$chk_signoff = 0 if ($file);
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my @dep_includes = ();
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my @dep_functions = ();
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my $removal = "Documentation/feature-removal-schedule.txt";
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if ($tree && -f "$root/$removal") {
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open(my $REMOVE, '<', "$root/$removal") ||
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die "$P: $removal: open failed - $!\n";
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while (<$REMOVE>) {
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if (/^Check:\s+(.*\S)/) {
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for my $entry (split(/[, ]+/, $1)) {
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if ($entry =~ m@include/(.*)@) {
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push(@dep_includes, $1);
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} elsif ($entry !~ m@/@) {
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push(@dep_functions, $entry);
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}
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}
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}
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}
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close($REMOVE);
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}
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my @rawlines = ();
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my @lines = ();
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my $vname;
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for my $filename (@ARGV) {
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my $FILE;
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if ($file) {
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open($FILE, '-|', "diff -u /dev/null $filename") ||
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die "$P: $filename: diff failed - $!\n";
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} elsif ($filename eq '-') {
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open($FILE, '<&STDIN');
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} else {
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open($FILE, '<', "$filename") ||
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die "$P: $filename: open failed - $!\n";
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}
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if ($filename eq '-') {
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$vname = 'Your patch';
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} else {
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$vname = $filename;
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}
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while (<$FILE>) {
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chomp;
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push(@rawlines, $_);
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}
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close($FILE);
|
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if (!process($filename)) {
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$exit = 1;
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}
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@rawlines = ();
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@lines = ();
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}
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exit($exit);
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|
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sub top_of_kernel_tree {
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my ($root) = @_;
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|
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my @tree_check = (
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"COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
|
|
"README", "Documentation", "arch", "include", "drivers",
|
|
"fs", "init", "ipc", "kernel", "lib", "scripts",
|
|
);
|
|
|
|
foreach my $check (@tree_check) {
|
|
if (! -e $root . '/' . $check) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
sub parse_email {
|
|
my ($formatted_email) = @_;
|
|
|
|
my $name = "";
|
|
my $address = "";
|
|
my $comment = "";
|
|
|
|
if ($formatted_email =~ /^(.*)<(\S+\@\S+)>(.*)$/) {
|
|
$name = $1;
|
|
$address = $2;
|
|
$comment = $3 if defined $3;
|
|
} elsif ($formatted_email =~ /^\s*<(\S+\@\S+)>(.*)$/) {
|
|
$address = $1;
|
|
$comment = $2 if defined $2;
|
|
} elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) {
|
|
$address = $1;
|
|
$comment = $2 if defined $2;
|
|
$formatted_email =~ s/$address.*$//;
|
|
$name = $formatted_email;
|
|
$name =~ s/^\s+|\s+$//g;
|
|
$name =~ s/^\"|\"$//g;
|
|
# If there's a name left after stripping spaces and
|
|
# leading quotes, and the address doesn't have both
|
|
# leading and trailing angle brackets, the address
|
|
# is invalid. ie:
|
|
# "joe smith joe@smith.com" bad
|
|
# "joe smith <joe@smith.com" bad
|
|
if ($name ne "" && $address !~ /^<[^>]+>$/) {
|
|
$name = "";
|
|
$address = "";
|
|
$comment = "";
|
|
}
|
|
}
|
|
|
|
$name =~ s/^\s+|\s+$//g;
|
|
$name =~ s/^\"|\"$//g;
|
|
$address =~ s/^\s+|\s+$//g;
|
|
$address =~ s/^\<|\>$//g;
|
|
|
|
if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
|
|
$name =~ s/(?<!\\)"/\\"/g; ##escape quotes
|
|
$name = "\"$name\"";
|
|
}
|
|
|
|
return ($name, $address, $comment);
|
|
}
|
|
|
|
sub format_email {
|
|
my ($name, $address) = @_;
|
|
|
|
my $formatted_email;
|
|
|
|
$name =~ s/^\s+|\s+$//g;
|
|
$name =~ s/^\"|\"$//g;
|
|
$address =~ s/^\s+|\s+$//g;
|
|
|
|
if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
|
|
$name =~ s/(?<!\\)"/\\"/g; ##escape quotes
|
|
$name = "\"$name\"";
|
|
}
|
|
|
|
if ("$name" eq "") {
|
|
$formatted_email = "$address";
|
|
} else {
|
|
$formatted_email = "$name <$address>";
|
|
}
|
|
|
|
return $formatted_email;
|
|
}
|
|
|
|
sub which_conf {
|
|
my ($conf) = @_;
|
|
|
|
foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
|
|
if (-e "$path/$conf") {
|
|
return "$path/$conf";
|
|
}
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
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 >= $len) {
|
|
last;
|
|
}
|
|
if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) {
|
|
$level++;
|
|
$type = '#';
|
|
}
|
|
}
|
|
$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 ($level == 0) {
|
|
if (substr($blk, $off + 1, 1) eq ';') {
|
|
$off++;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
# Preprocessor commands end at the newline unless escaped.
|
|
if ($type eq '#' && $c eq "\n" && $p ne "\\") {
|
|
$level--;
|
|
$type = '';
|
|
$off++;
|
|
last;
|
|
}
|
|
$off++;
|
|
}
|
|
# We are truly at the end, so shuffle to the next line.
|
|
if ($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 ($lines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
|
|
push(@stack, $level);
|
|
} elsif ($lines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
|
|
$level = $stack[$#stack - 1];
|
|
} elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) {
|
|
$level = pop(@stack);
|
|
}
|
|
|
|
foreach my $c (split(//, $lines[$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 =~ /^(\(\s*$Type\s*)\)/ && $av_pending eq '_') {
|
|
print "CAST($1)\n" if ($dbg_values > 1);
|
|
push(@av_paren_type, $type);
|
|
$type = 'c';
|
|
|
|
} elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\(|\s*$)/) {
|
|
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 show_type {
|
|
return !defined $ignore_type{$_[0]};
|
|
}
|
|
|
|
sub report {
|
|
if (!show_type($_[1]) ||
|
|
(defined $tst_only && $_[2] !~ /\Q$tst_only\E/)) {
|
|
return 0;
|
|
}
|
|
my $line;
|
|
if ($show_types) {
|
|
$line = "$prefix$_[0]:$_[1]: $_[2]\n";
|
|
} else {
|
|
$line = "$prefix$_[0]: $_[2]\n";
|
|
}
|
|
$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], $_[1])) {
|
|
our $clean = 0;
|
|
our $cnt_error++;
|
|
}
|
|
}
|
|
sub WARN {
|
|
if (report("WARNING", $_[0], $_[1])) {
|
|
our $clean = 0;
|
|
our $cnt_warn++;
|
|
}
|
|
}
|
|
sub CHK {
|
|
if ($check && report("CHECK", $_[0], $_[1])) {
|
|
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_PATH",
|
|
"use relative pathname instead of absolute in changelog text\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
sub cleanup_continuation_headers {
|
|
# Collapse any header-continuation lines into a single line so they
|
|
# can be parsed meaningfully, as the parser only has one line
|
|
# of context to work with.
|
|
my $again;
|
|
do {
|
|
$again = 0;
|
|
foreach my $n (0 .. scalar(@rawlines) - 2) {
|
|
if ($rawlines[$n]=~/^\s*$/) {
|
|
# A blank line means there's no more chance
|
|
# of finding headers. Shortcut to done.
|
|
return;
|
|
}
|
|
if ($rawlines[$n]=~/^[\x21-\x39\x3b-\x7e]+:/ &&
|
|
$rawlines[$n+1]=~/^\s+/) {
|
|
# Continuation header. Collapse it.
|
|
my $line = splice @rawlines, $n+1, 1;
|
|
$line=~s/^\s+/ /;
|
|
$rawlines[$n] .= $line;
|
|
# We've 'destabilized' the list, so restart.
|
|
$again = 1;
|
|
last;
|
|
}
|
|
}
|
|
} while ($again);
|
|
}
|
|
|
|
sub pos_last_openparen {
|
|
my ($line) = @_;
|
|
|
|
my $pos = 0;
|
|
|
|
my $opens = $line =~ tr/\(/\(/;
|
|
my $closes = $line =~ tr/\)/\)/;
|
|
|
|
my $last_openparen = 0;
|
|
|
|
if (($opens == 0) || ($closes >= $opens)) {
|
|
return -1;
|
|
}
|
|
|
|
my $len = length($line);
|
|
|
|
for ($pos = 0; $pos < $len; $pos++) {
|
|
my $string = substr($line, $pos);
|
|
if ($string =~ /^($FuncArg|$balanced_parens)/) {
|
|
$pos += length($1) - 1;
|
|
} elsif (substr($line, $pos, 1) eq '(') {
|
|
$last_openparen = $pos;
|
|
} elsif (index($string, '(') == -1) {
|
|
last;
|
|
}
|
|
}
|
|
|
|
return $last_openparen + 1;
|
|
}
|
|
|
|
sub process {
|
|
my $filename = shift;
|
|
|
|
my $linenr=0;
|
|
my $prevline="";
|
|
my $prevrawline="";
|
|
my $stashline="";
|
|
my $stashrawline="";
|
|
my $subjectline="";
|
|
my $sublinenr="";
|
|
|
|
my $length;
|
|
my $indent;
|
|
my $previndent=0;
|
|
my $stashindent=0;
|
|
|
|
our $clean = 1;
|
|
my $signoff = 0;
|
|
my $is_patch = 0;
|
|
|
|
my $in_header_lines = 1;
|
|
my $in_commit_log = 0; #Scanning lines before patch
|
|
|
|
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;
|
|
my $suppress_statement = 0;
|
|
|
|
# Pre-scan the patch sanitizing the lines.
|
|
# Pre-scan the patch looking for any __setup documentation.
|
|
#
|
|
my @setup_docs = ();
|
|
my $setup_docs = 0;
|
|
|
|
my $exec_file = "";
|
|
|
|
my $shorttext = BEFORE_SHORTTEXT;
|
|
my $shorttext_exspc = 0;
|
|
my $commit_text_present = 0;
|
|
|
|
sanitise_line_reset();
|
|
cleanup_continuation_headers();
|
|
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 = ();
|
|
$suppress_statement = 0;
|
|
next;
|
|
|
|
# track the line number as we move through the hunk, note that
|
|
# new versions of GNU diff omit the leading space on completely
|
|
# blank context lines so we need to count that too.
|
|
} elsif ($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 =~ /^diff --git.*?(\S+)$/) {
|
|
$realfile = $1;
|
|
$realfile =~ s@^([^/]*)/@@;
|
|
$in_commit_log = 0;
|
|
$exec_file = $realfile;
|
|
} elsif ($line =~ /^\+\+\+\s+(\S+)/) {
|
|
$realfile = $1;
|
|
$realfile =~ s@^([^/]*)/@@;
|
|
$in_commit_log = 0;
|
|
|
|
$p1_prefix = $1;
|
|
if (!$file && $tree && $p1_prefix ne '' &&
|
|
-e "$root/$p1_prefix") {
|
|
WARN("PATCH_PREFIX",
|
|
"patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
|
|
}
|
|
|
|
if ($realfile =~ m@^include/asm/@) {
|
|
ERROR("MODIFIED_INCLUDE_ASM",
|
|
"do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
|
|
}
|
|
$exec_file = "";
|
|
next;
|
|
}
|
|
elsif ($rawline =~ /^diff.+a\/(.+)\sb\/.+$/) {
|
|
$exec_file = $1;
|
|
}
|
|
#Check state to make sure we aren't in code block.
|
|
elsif (($exec_file =~ /^.+\.[chS]$/ or
|
|
$exec_file =~ /^.+\.txt$/ or
|
|
$exec_file =~ /^.+\.ihex$/ or
|
|
$exec_file =~ /^.+\.hex$/ or
|
|
$exec_file =~ /^.+\.HEX$/ or
|
|
$exec_file =~ /^.+defconfig$/ or
|
|
$exec_file =~ /^Makefile$/ or
|
|
$exec_file =~ /^Kconfig$/) &&
|
|
$rawline =~ /^new (file )?mode\s([0-9]+)$/ &&
|
|
(oct($2) & 0111)) {
|
|
ERROR("EXECUTE_PERMISSIONS",
|
|
"Source file has +x permissions: " .
|
|
"$exec_file\n");
|
|
}
|
|
$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";
|
|
|
|
if ($shorttext != AFTER_SHORTTEXT) {
|
|
if ($shorttext == IN_SHORTTEXT_BLANKLINE && $line=~/\S/) {
|
|
# the subject line was just processed,
|
|
# a blank line must be next
|
|
WARN("NONBLANK_AFTER_SUMMARY",
|
|
"non-blank line after summary line\n" . $herecurr);
|
|
$shorttext = IN_SHORTTEXT;
|
|
# this non-blank line may or may not be commit text -
|
|
# a warning has been generated so assume it is commit
|
|
# text and move on
|
|
$commit_text_present = 1;
|
|
# fall through and treat this line as IN_SHORTTEXT
|
|
}
|
|
if ($shorttext == IN_SHORTTEXT) {
|
|
if ($line=~/^---/ || $line=~/^diff.*/) {
|
|
if ($commit_text_present == 0) {
|
|
WARN("NO_COMMIT_TEXT",
|
|
"please add commit text explaining " .
|
|
"*why* the change is needed\n" .
|
|
$herecurr);
|
|
}
|
|
$shorttext = AFTER_SHORTTEXT;
|
|
} elsif (length($line) > (SHORTTEXT_LIMIT +
|
|
$shorttext_exspc)
|
|
&& $line !~ /^:([0-7]{6}\s){2}
|
|
([[:xdigit:]]+\.*
|
|
\s){2}\w+\s\w+/xms) {
|
|
WARN("LONG_COMMIT_TEXT",
|
|
"commit text line over " .
|
|
SHORTTEXT_LIMIT .
|
|
" characters\n" . $herecurr);
|
|
} elsif ($line=~/^\s*change-id:/i ||
|
|
$line=~/^\s*signed-off-by:/i ||
|
|
$line=~/^\s*crs-fixed:/i ||
|
|
$line=~/^\s*acked-by:/i) {
|
|
# this is a tag, there must be commit
|
|
# text by now
|
|
if ($commit_text_present == 0) {
|
|
WARN("NO_COMMIT_TEXT",
|
|
"please add commit text explaining " .
|
|
"*why* the change is needed\n" .
|
|
$herecurr);
|
|
# prevent duplicate warnings
|
|
$commit_text_present = 1;
|
|
}
|
|
} elsif ($line=~/\S/) {
|
|
$commit_text_present = 1;
|
|
}
|
|
} elsif ($shorttext == IN_SHORTTEXT_BLANKLINE) {
|
|
# case of non-blank line in this state handled above
|
|
$shorttext = IN_SHORTTEXT;
|
|
} elsif ($shorttext == CHECK_NEXT_SHORTTEXT) {
|
|
# The Subject line doesn't have to be the last header in the patch.
|
|
# Avoid moving to the IN_SHORTTEXT state until clear of all headers.
|
|
# Per RFC5322, continuation lines must be folded, so any left-justified
|
|
# text which looks like a header is definitely a header.
|
|
if ($line!~/^[\x21-\x39\x3b-\x7e]+:/) {
|
|
$shorttext = IN_SHORTTEXT;
|
|
# Check for Subject line followed by a blank line.
|
|
if (length($line) != 0) {
|
|
WARN("NONBLANK_AFTER_SUMMARY",
|
|
"non-blank line after " .
|
|
"summary line\n" .
|
|
$sublinenr . $here .
|
|
"\n" . $subjectline .
|
|
"\n" . $line . "\n");
|
|
# this non-blank line may or may not
|
|
# be commit text - a warning has been
|
|
# generated so assume it is commit
|
|
# text and move on
|
|
$commit_text_present = 1;
|
|
}
|
|
}
|
|
# The next two cases are BEFORE_SHORTTEXT.
|
|
} elsif ($line=~/^Subject: \[[^\]]*\] (.*)/) {
|
|
# This is the subject line. Go to
|
|
# CHECK_NEXT_SHORTTEXT to wait for the commit
|
|
# text to show up.
|
|
$shorttext = CHECK_NEXT_SHORTTEXT;
|
|
$subjectline = $line;
|
|
$sublinenr = "#$linenr & ";
|
|
# Check for Subject line less than line limit
|
|
if (length($1) > SHORTTEXT_LIMIT) {
|
|
WARN("LONG_SUMMARY_LINE",
|
|
"summary line over " .
|
|
SHORTTEXT_LIMIT .
|
|
" characters\n" . $herecurr);
|
|
}
|
|
} elsif ($line=~/^ (.*)/) {
|
|
# Indented format, this must be the summary
|
|
# line (i.e. git show). There will be no more
|
|
# headers so we are now in the shorttext.
|
|
$shorttext = IN_SHORTTEXT_BLANKLINE;
|
|
$shorttext_exspc = 4;
|
|
if (length($1) > SHORTTEXT_LIMIT) {
|
|
WARN("LONG_SUMMARY_LINE",
|
|
"summary line over " .
|
|
SHORTTEXT_LIMIT .
|
|
" characters\n" . $herecurr);
|
|
}
|
|
}
|
|
}
|
|
|
|
$cnt_lines++ if ($realcnt != 0);
|
|
|
|
# Check for incorrect file permissions
|
|
if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) {
|
|
my $permhere = $here . "FILE: $realfile\n";
|
|
if ($realfile =~ /(Makefile|Kconfig|\.c|\.h|\.S|\.tmpl)$/) {
|
|
ERROR("EXECUTE_PERMISSIONS",
|
|
"do not set execute permissions for source files\n" . $permhere);
|
|
}
|
|
}
|
|
|
|
# Check the patch for a signoff:
|
|
if ($line =~ /^\s*signed-off-by:/i) {
|
|
$signoff++;
|
|
$in_commit_log = 0;
|
|
}
|
|
|
|
# Check signature styles
|
|
if (!$in_header_lines &&
|
|
$line =~ /^(\s*)($signature_tags)(\s*)(.*)/) {
|
|
my $space_before = $1;
|
|
my $sign_off = $2;
|
|
my $space_after = $3;
|
|
my $email = $4;
|
|
my $ucfirst_sign_off = ucfirst(lc($sign_off));
|
|
|
|
if (defined $space_before && $space_before ne "") {
|
|
WARN("BAD_SIGN_OFF",
|
|
"Do not use whitespace before $ucfirst_sign_off\n" . $herecurr);
|
|
}
|
|
if ($sign_off =~ /-by:$/i && $sign_off ne $ucfirst_sign_off) {
|
|
WARN("BAD_SIGN_OFF",
|
|
"'$ucfirst_sign_off' is the preferred signature form\n" . $herecurr);
|
|
}
|
|
if (!defined $space_after || $space_after ne " ") {
|
|
WARN("BAD_SIGN_OFF",
|
|
"Use a single space after $ucfirst_sign_off\n" . $herecurr);
|
|
}
|
|
|
|
my ($email_name, $email_address, $comment) = parse_email($email);
|
|
my $suggested_email = format_email(($email_name, $email_address));
|
|
if ($suggested_email eq "") {
|
|
ERROR("BAD_SIGN_OFF",
|
|
"Unrecognized email address: '$email'\n" . $herecurr);
|
|
} else {
|
|
my $dequoted = $suggested_email;
|
|
$dequoted =~ s/^"//;
|
|
$dequoted =~ s/" </ </;
|
|
# Don't force email to have quotes
|
|
# Allow just an angle bracketed address
|
|
if ("$dequoted$comment" ne $email &&
|
|
"<$email_address>$comment" ne $email &&
|
|
"$suggested_email$comment" ne $email) {
|
|
WARN("BAD_SIGN_OFF",
|
|
"email address '$email' might be better as '$suggested_email$comment'\n" . $herecurr);
|
|
}
|
|
}
|
|
if ($line =~ /^\s*signed-off-by:.*(quicinc|qualcomm)\.com/i) {
|
|
WARN("BAD_SIGN_OFF",
|
|
"invalid Signed-off-by identity\n" . $line );
|
|
}
|
|
}
|
|
|
|
#check the patch for invalid author credentials
|
|
if ($line =~ /^From:.*(quicinc|qualcomm)\.com/) {
|
|
WARN("BAD_AUTHOR", "invalid author identity\n" . $line );
|
|
}
|
|
|
|
# Check for wrappage within a valid hunk of the file
|
|
if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
|
|
ERROR("CORRUPTED_PATCH",
|
|
"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";
|
|
|
|
CHK("INVALID_UTF8",
|
|
"Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
|
|
}
|
|
|
|
# Check if it's the start of a commit log
|
|
# (not a header line and we haven't seen the patch filename)
|
|
if ($in_header_lines && $realfile =~ /^$/ &&
|
|
$rawline !~ /^(commit\b|from\b|[\w-]+:).+$/i) {
|
|
$in_header_lines = 0;
|
|
$in_commit_log = 1;
|
|
}
|
|
|
|
# Still not yet in a patch, check for any UTF-8
|
|
if ($in_commit_log && $realfile =~ /^$/ &&
|
|
$rawline =~ /$NON_ASCII_UTF8/) {
|
|
CHK("UTF8_BEFORE_PATCH",
|
|
"8-bit UTF-8 used in possible commit log\n" . $herecurr);
|
|
}
|
|
|
|
# ignore non-hunk lines and lines being removed
|
|
next if (!$hunk_line || $line =~ /^-/);
|
|
|
|
#trailing whitespace
|
|
if ($line =~ /^\+.*\015/) {
|
|
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
|
|
ERROR("DOS_LINE_ENDINGS",
|
|
"DOS line endings\n" . $herevet);
|
|
|
|
} elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
|
|
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
|
|
ERROR("TRAILING_WHITESPACE",
|
|
"trailing whitespace\n" . $herevet);
|
|
$rpt_cleaners = 1;
|
|
}
|
|
|
|
# check for Kconfig help text having a real description
|
|
# Only applies when adding the entry originally, after that we do not have
|
|
# sufficient context to determine whether it is indeed long enough.
|
|
if ($realfile =~ /Kconfig/ &&
|
|
$line =~ /.\s*config\s+/) {
|
|
my $length = 0;
|
|
my $cnt = $realcnt;
|
|
my $ln = $linenr + 1;
|
|
my $f;
|
|
my $is_start = 0;
|
|
my $is_end = 0;
|
|
for (; $cnt > 0 && defined $lines[$ln - 1]; $ln++) {
|
|
$f = $lines[$ln - 1];
|
|
$cnt-- if ($lines[$ln - 1] !~ /^-/);
|
|
$is_end = $lines[$ln - 1] =~ /^\+/;
|
|
|
|
next if ($f =~ /^-/);
|
|
|
|
if ($lines[$ln - 1] =~ /.\s*(?:bool|tristate)\s*\"/) {
|
|
$is_start = 1;
|
|
} elsif ($lines[$ln - 1] =~ /.\s*(?:---)?help(?:---)?$/) {
|
|
$length = -1;
|
|
}
|
|
|
|
$f =~ s/^.//;
|
|
$f =~ s/#.*//;
|
|
$f =~ s/^\s+//;
|
|
next if ($f =~ /^$/);
|
|
if ($f =~ /^\s*config\s/) {
|
|
$is_end = 1;
|
|
last;
|
|
}
|
|
$length++;
|
|
}
|
|
WARN("CONFIG_DESCRIPTION",
|
|
"please write a paragraph that describes the config symbol fully\n" . $herecurr) if ($is_start && $is_end && $length < 4);
|
|
#print "is_start<$is_start> is_end<$is_end> length<$length>\n";
|
|
}
|
|
|
|
if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
|
|
($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
|
|
my $flag = $1;
|
|
my $replacement = {
|
|
'EXTRA_AFLAGS' => 'asflags-y',
|
|
'EXTRA_CFLAGS' => 'ccflags-y',
|
|
'EXTRA_CPPFLAGS' => 'cppflags-y',
|
|
'EXTRA_LDFLAGS' => 'ldflags-y',
|
|
};
|
|
|
|
WARN("DEPRECATED_VARIABLE",
|
|
"Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag});
|
|
}
|
|
|
|
# check we are in a valid source file if not then ignore this hunk
|
|
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
|
|
|
|
#80 column limit
|
|
if ($line =~ /^\+/ && $prevrawline !~ /\/\*\*/ &&
|
|
$rawline !~ /^.\s*\*\s*\@$Ident\s/ &&
|
|
!($line =~ /^\+\s*$logFunctions\s*\(\s*(?:(KERN_\S+\s*|[^"]*))?"[X\t]*"\s*(?:|,|\)\s*;)\s*$/ ||
|
|
$line =~ /^\+\s*"[^"]*"\s*(?:\s*|,|\)\s*;)\s*$/) &&
|
|
$realfile ne "scripts/checkpatch.pl" &&
|
|
$length > 80)
|
|
{
|
|
WARN("LONG_LINE",
|
|
"line over 80 characters\n" . $herecurr);
|
|
}
|
|
|
|
# Check for user-visible strings broken across lines, which breaks the ability
|
|
# to grep for the string. Limited to strings used as parameters (those
|
|
# following an open parenthesis), which almost completely eliminates false
|
|
# positives, as well as warning only once per parameter rather than once per
|
|
# line of the string. Make an exception when the previous string ends in a
|
|
# newline (multiple lines in one string constant) or \n\t (common in inline
|
|
# assembly to indent the instruction on the following line).
|
|
if ($line =~ /^\+\s*"/ &&
|
|
$prevline =~ /"\s*$/ &&
|
|
$prevline =~ /\(/ &&
|
|
$prevrawline !~ /\\n(?:\\t)*"\s*$/) {
|
|
WARN("SPLIT_STRING",
|
|
"quoted string split across lines\n" . $hereprev);
|
|
}
|
|
|
|
# check for spaces before a quoted newline
|
|
if ($rawline =~ /^.*\".*\s\\n/) {
|
|
WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",
|
|
"unnecessary whitespace before a quoted newline\n" . $herecurr);
|
|
}
|
|
|
|
# check for adding lines without a newline.
|
|
if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
|
|
WARN("MISSING_EOF_NEWLINE",
|
|
"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("LO_MACRO",
|
|
"use the LO() macro, not (... & 0xFFFF)\n" . $herevet);
|
|
}
|
|
if ($line =~ /\.[hH][[:space:]]*=.*>>[[:space:]]*16/) {
|
|
my $herevet = "$here\n" . cat_vet($line) . "\n";
|
|
ERROR("HI_MACRO",
|
|
"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",
|
|
"code indent should use tabs where possible\n" . $herevet);
|
|
$rpt_cleaners = 1;
|
|
}
|
|
|
|
# check for space before tabs.
|
|
if ($rawline =~ /^\+/ && $rawline =~ / \t/) {
|
|
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
|
|
WARN("SPACE_BEFORE_TAB",
|
|
"please, no space before tabs\n" . $herevet);
|
|
}
|
|
|
|
# check for && or || at the start of a line
|
|
if ($rawline =~ /^\+\s*(&&|\|\|)/) {
|
|
CHK("LOGICAL_CONTINUATIONS",
|
|
"Logical continuations should be on the previous line\n" . $hereprev);
|
|
}
|
|
|
|
# check multi-line statement indentation matches previous line
|
|
if ($^V && $^V ge 5.10.0 &&
|
|
$prevline =~ /^\+(\t*)(if \(|$Ident\().*(\&\&|\|\||,)\s*$/) {
|
|
$prevline =~ /^\+(\t*)(.*)$/;
|
|
my $oldindent = $1;
|
|
my $rest = $2;
|
|
|
|
my $pos = pos_last_openparen($rest);
|
|
if ($pos >= 0) {
|
|
$line =~ /^\+([ \t]*)/;
|
|
my $newindent = $1;
|
|
|
|
my $goodtabindent = $oldindent .
|
|
"\t" x ($pos / 8) .
|
|
" " x ($pos % 8);
|
|
my $goodspaceindent = $oldindent . " " x $pos;
|
|
|
|
if ($newindent ne $goodtabindent &&
|
|
$newindent ne $goodspaceindent) {
|
|
CHK("PARENTHESIS_ALIGNMENT",
|
|
"Alignment should match open parenthesis\n" . $hereprev);
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($line =~ /^\+.*\*[ \t]*\)[ \t]+/) {
|
|
CHK("SPACING",
|
|
"No space is necessary after a cast\n" . $hereprev);
|
|
}
|
|
|
|
# check for spaces at the beginning of a line.
|
|
# Exceptions:
|
|
# 1) within comments
|
|
# 2) indented preprocessor commands
|
|
# 3) hanging labels
|
|
if ($rawline =~ /^\+ / && $line !~ /\+ *(?:$;|#|$Ident:)/) {
|
|
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
|
|
WARN("LEADING_SPACE",
|
|
"please, no spaces at the start of a line\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_KEYWORD",
|
|
"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("CSYNC",
|
|
"use the CSYNC() macro in asm/blackfin.h\n" . $herevet);
|
|
}
|
|
if ($line =~ /__builtin_bfin_ssync/) {
|
|
my $herevet = "$here\n" . cat_vet($line) . "\n";
|
|
ERROR("SSYNC",
|
|
"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,
|
|
$realline_next);
|
|
#print "LINE<$line>\n";
|
|
if ($linenr >= $suppress_statement &&
|
|
$realcnt && $line =~ /.\s*\S/) {
|
|
($stat, $cond, $line_nr_next, $remain_next, $off_next) =
|
|
ctx_statement_block($linenr, $realcnt, 0);
|
|
$stat =~ s/\n./\n /g;
|
|
$cond =~ s/\n./\n /g;
|
|
|
|
#print "linenr<$linenr> <$stat>\n";
|
|
# If this statement has no statement boundaries within
|
|
# it there is no point in retrying a statement scan
|
|
# until we hit end of it.
|
|
my $frag = $stat; $frag =~ s/;+\s*$//;
|
|
if ($frag !~ /(?:{|;)/) {
|
|
#print "skip<$line_nr_next>\n";
|
|
$suppress_statement = $line_nr_next;
|
|
}
|
|
|
|
# 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_CASE_INDENT_LEVEL",
|
|
"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, $realcnt, 0);
|
|
|
|
if ($line =~ /^\+\t{6,}/) {
|
|
WARN("DEEP_INDENTATION",
|
|
"Too many leading tabs - consider code refactoring\n" . $herecurr);
|
|
}
|
|
|
|
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("OPEN_BRACE",
|
|
"that open brace { should be on the previous line\n" .
|
|
"$here\n$ctx\n$rawlines[$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 > $indent) {
|
|
WARN("TRAILING_SEMICOLON",
|
|
"trailing semicolon indicates no statements, indent implies otherwise\n" .
|
|
"$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
# Check relative indent for conditionals and blocks.
|
|
if ($line =~ /\b(?:(?:if|while|for)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
|
|
($stat, $cond, $line_nr_next, $remain_next, $off_next) =
|
|
ctx_statement_block($linenr, $realcnt, 0)
|
|
if (!defined $stat);
|
|
my ($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 && $s ne ''))) {
|
|
WARN("SUSPECT_CODE_INDENT",
|
|
"suspect code indent for conditional statements ($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_TYPE",
|
|
"TEST: is type\n" . $herecurr);
|
|
} elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
|
|
ERROR("TEST_NOT_TYPE",
|
|
"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_ATTR",
|
|
"TEST: is attr\n" . $herecurr);
|
|
} elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
|
|
ERROR("TEST_NOT_ATTR",
|
|
"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("OPEN_BRACE",
|
|
"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",
|
|
"malformed #include filename\n" .
|
|
$herecurr);
|
|
}
|
|
}
|
|
|
|
# no C99 // comments
|
|
if ($line =~ m{//}) {
|
|
ERROR("C99_COMMENTS",
|
|
"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.*\((.*)\)/)) {
|
|
# Handle definitions which produce identifiers with
|
|
# a prefix:
|
|
# XXX(foo);
|
|
# EXPORT_SYMBOL(something_foo);
|
|
my $name = $1;
|
|
if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ &&
|
|
$name =~ /^${Ident}_$2/) {
|
|
#print "FOO C name<$name>\n";
|
|
$suppress_export{$realline_next} = 1;
|
|
|
|
} elsif ($stat !~ /(?:
|
|
\n.}\s*$|
|
|
^.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",
|
|
"EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
|
|
}
|
|
|
|
# check for global initialisers.
|
|
if ($line =~ /^.$Type\s*$Ident\s*(?:\s+$Modifier)*\s*=\s*(0|NULL|false)\s*;/) {
|
|
ERROR("GLOBAL_INITIALISERS",
|
|
"do not initialise globals to 0 or NULL\n" .
|
|
$herecurr);
|
|
}
|
|
# check for static initialisers.
|
|
if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
|
|
ERROR("INITIALISED_STATIC",
|
|
"do not initialise statics to 0 or NULL\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# check for static const char * arrays.
|
|
if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
|
|
WARN("STATIC_CONST_CHAR_ARRAY",
|
|
"static const char * array should probably be static const char * const\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# check for static char foo[] = "bar" declarations.
|
|
if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) {
|
|
WARN("STATIC_CONST_CHAR_ARRAY",
|
|
"static char array declaration should probably be static const char\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# check for declarations of struct pci_device_id
|
|
if ($line =~ /\bstruct\s+pci_device_id\s+\w+\s*\[\s*\]\s*\=\s*\{/) {
|
|
WARN("DEFINE_PCI_DEVICE_TABLE",
|
|
"Use DEFINE_PCI_DEVICE_TABLE for struct pci_device_id\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("NEW_TYPEDEFS",
|
|
"do not add new typedefs\n" . $herecurr);
|
|
}
|
|
|
|
# * goes on variable not on type
|
|
# (char*[ const])
|
|
while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) {
|
|
#print "AA<$1>\n";
|
|
my ($from, $to) = ($2, $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 ($to =~ s/\*\s+\*/\*\*/) {
|
|
}
|
|
|
|
#print "from<$from> to<$to>\n";
|
|
if ($from ne $to) {
|
|
ERROR("POINTER_LOCATION",
|
|
"\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr);
|
|
}
|
|
}
|
|
while ($line =~ m{(\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident))}g) {
|
|
#print "BB<$1>\n";
|
|
my ($from, $to, $ident) = ($2, $2, $3);
|
|
|
|
# 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$/) {
|
|
ERROR("POINTER_LOCATION",
|
|
"\"foo${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",
|
|
"LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
|
|
}
|
|
|
|
# check for uses of printk_ratelimit
|
|
if ($line =~ /\bprintk_ratelimit\s*\(/) {
|
|
WARN("PRINTK_RATELIMITED",
|
|
"Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
|
|
}
|
|
|
|
# printk should use KERN_* levels. Note that follow on printk's on the
|
|
# same line do not need a level, so we use the current block context
|
|
# to try and find and validate the current printk. In summary the current
|
|
# printk includes all preceding printk's which have no newline on the end.
|
|
# we assume the first bad printk is the one to report.
|
|
if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
|
|
my $ok = 0;
|
|
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
|
|
#print "CHECK<$lines[$ln - 1]\n";
|
|
# we have a preceding printk if it ends
|
|
# with "\n" ignore it, else it is to blame
|
|
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
|
|
if ($rawlines[$ln - 1] !~ m{\\n"}) {
|
|
$ok = 1;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
if ($ok == 0) {
|
|
WARN("PRINTK_WITHOUT_KERN_LEVEL",
|
|
"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",
|
|
"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",
|
|
"open brace '{' following $1 go on the same line\n" . $hereprev);
|
|
}
|
|
|
|
# missing space after union, struct or enum definition
|
|
if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?(?:\s+$Ident)?[=\{]/) {
|
|
WARN("SPACING",
|
|
"missing space after $1 definition\n" . $herecurr);
|
|
}
|
|
|
|
# check for spacing round square brackets; allowed:
|
|
# 1. with a type on the left -- int [] a;
|
|
# 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
|
|
# 3. inside a curly brace -- = { [0...10] = 5 }
|
|
while ($line =~ /(.*?\s)\[/g) {
|
|
my ($where, $prefix) = ($-[1], $1);
|
|
if ($prefix !~ /$Type\s+$/ &&
|
|
($where != 0 || $prefix !~ /^.\s+$/) &&
|
|
$prefix !~ /[{,]\s+$/) {
|
|
ERROR("BRACKET_SPACE",
|
|
"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("SPACING",
|
|
"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 preceding 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 !~ /^\\/ && $cc !~ /^;/) {
|
|
ERROR("SPACING",
|
|
"space required after that '$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("SPACING",
|
|
"spaces prohibited around that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# , must have a space on the right.
|
|
} elsif ($op eq ',') {
|
|
if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
|
|
ERROR("SPACING",
|
|
"space required after that '$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 !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
|
|
ERROR("SPACING",
|
|
"space required before that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
|
|
# A unary '*' may be const
|
|
|
|
} elsif ($ctx =~ /.xW/) {
|
|
ERROR("SPACING",
|
|
"space prohibited after that '$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]/ && $ctx !~ /[^W]x[WOBEC]/) {
|
|
ERROR("SPACING",
|
|
"space required one side of that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($ctx =~ /Wx[BE]/ ||
|
|
($ctx =~ /Wx./ && $cc =~ /^;/)) {
|
|
ERROR("SPACING",
|
|
"space prohibited before that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($ctx =~ /ExW/) {
|
|
ERROR("SPACING",
|
|
"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("SPACING",
|
|
"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("SPACING",
|
|
"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("SPACING",
|
|
"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",
|
|
"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("MULTIPLE_DECLARATION",
|
|
## "declaring multiple variables together should be avoided\n" . $herecurr);
|
|
## }
|
|
## }
|
|
|
|
#need space before brace following if, while, etc
|
|
if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
|
|
$line =~ /do{/) {
|
|
ERROR("SPACING",
|
|
"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("SPACING",
|
|
"space required after that close brace '}'\n" . $herecurr);
|
|
}
|
|
|
|
# check spacing on square brackets
|
|
if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
|
|
ERROR("SPACING",
|
|
"space prohibited after that open square bracket '['\n" . $herecurr);
|
|
}
|
|
if ($line =~ /\s\]/) {
|
|
ERROR("SPACING",
|
|
"space prohibited before that close square bracket ']'\n" . $herecurr);
|
|
}
|
|
|
|
# check spacing on parentheses
|
|
if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
|
|
$line !~ /for\s*\(\s+;/ && $line !~ /^\+\s*[A-Z_][A-Z\d_]*\(\s*\d+(\,.*)?\)\,?$/) {
|
|
ERROR("SPACING",
|
|
"space prohibited after that open parenthesis '('\n" . $herecurr);
|
|
}
|
|
if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
|
|
$line !~ /for\s*\(.*;\s+\)/ &&
|
|
$line !~ /:\s+\)/) {
|
|
ERROR("SPACING",
|
|
"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("INDENTED_LABEL",
|
|
"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/\(/ \(/g;
|
|
$value =~ s/\)/\) /g;
|
|
while ($value =~ s/\[[^\[\]]*\]/1/ ||
|
|
$value !~ /(?:$Ident|-?$Constant)\s*
|
|
$Compare\s*
|
|
(?:$Ident|-?$Constant)/x &&
|
|
$value =~ s/\([^\(\)]*\)/1/) {
|
|
}
|
|
#print "value<$value>\n";
|
|
if ($value =~ /^\s*(?:$Ident|-?$Constant)\s*$/) {
|
|
ERROR("RETURN_PARENTHESES",
|
|
"return is not a function, parentheses are not required\n" . $herecurr);
|
|
|
|
} elsif ($spacing !~ /\s+/) {
|
|
ERROR("SPACING",
|
|
"space required before the open parenthesis '('\n" . $herecurr);
|
|
}
|
|
}
|
|
# Return of what appears to be an errno should normally be -'ve
|
|
if ($line =~ /^.\s*return\s*(E[A-Z]*)\s*;/) {
|
|
my $name = $1;
|
|
if ($name ne 'EOF' && $name ne 'ERROR') {
|
|
WARN("USE_NEGATIVE_ERRNO",
|
|
"return of an errno should typically be -ve (return -$1)\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# Need a space before open parenthesis after if, while etc
|
|
if ($line=~/\b(if|while|for|switch)\(/) {
|
|
ERROR("SPACING", "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*(?!{)/) {
|
|
($stat, $cond, $line_nr_next, $remain_next, $off_next) =
|
|
ctx_statement_block($linenr, $realcnt, 0)
|
|
if (!defined $stat);
|
|
my ($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("ASSIGN_IN_IF",
|
|
"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 = '';
|
|
|
|
$stat_real = raw_line($linenr, $cond_lines)
|
|
. "\n" if ($cond_lines);
|
|
if (defined($stat_real) && $cond_lines > 1) {
|
|
$stat_real = "[...]\n$stat_real";
|
|
}
|
|
|
|
ERROR("TRAILING_STATEMENTS",
|
|
"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("HEXADECIMAL_BOOLEAN_TEST",
|
|
"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",
|
|
"trailing statements should be on next line\n" . $herecurr);
|
|
}
|
|
}
|
|
# if should not continue a brace
|
|
if ($line =~ /}\s*if\b/) {
|
|
ERROR("TRAILING_STATEMENTS",
|
|
"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",
|
|
"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_AFTER_BRACE",
|
|
"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_AFTER_BRACE",
|
|
"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("WHITESPACE_AFTER_LINE_CONTINUATION",
|
|
"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 &&
|
|
$1 !~ /$allowed_asm_includes/)
|
|
{
|
|
if ($realfile =~ m{^arch/}) {
|
|
CHK("ARCH_INCLUDE_LINUX",
|
|
"Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
|
|
} else {
|
|
WARN("INCLUDE_LINUX",
|
|
"Use #include <linux/$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 = $realcnt - 1;
|
|
my ($off, $dstat, $dcond, $rest);
|
|
my $ctx = '';
|
|
($dstat, $dcond, $ln, $cnt, $off) =
|
|
ctx_statement_block($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";
|
|
|
|
$dstat =~ s/^.\s*\#\s*define\s+$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/)
|
|
{
|
|
}
|
|
|
|
# Extremely long macros may fall off the end of the
|
|
# available context without closing. Give a dangling
|
|
# backslash the benefit of the doubt and allow it
|
|
# to gobble any hanging open-parens.
|
|
$dstat =~ s/\(.+\\$/1/;
|
|
|
|
# Flatten any obvious string concatentation.
|
|
while ($dstat =~ s/("X*")\s*$Ident/$1/ ||
|
|
$dstat =~ s/$Ident\s*("X*")/$1/)
|
|
{
|
|
}
|
|
|
|
my $exceptions = qr{
|
|
$Declare|
|
|
module_param_named|
|
|
MODULE_PARAM_DESC|
|
|
DECLARE_PER_CPU|
|
|
DEFINE_PER_CPU|
|
|
CLK_[A-Z\d_]+|
|
|
__typeof__\(|
|
|
union|
|
|
struct|
|
|
\.$Ident\s*=\s*|
|
|
^\"|\"$
|
|
}x;
|
|
#print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
|
|
if ($dstat ne '' &&
|
|
$dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(),
|
|
$dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo();
|
|
$dstat !~ /^[!~-]?(?:$Ident|$Constant)$/ && # 10 // foo() // !foo // ~foo // -foo
|
|
$dstat !~ /^'X'$/ && # character constants
|
|
$dstat !~ /$exceptions/ &&
|
|
$dstat !~ /^\.$Ident\s*=/ && # .foo =
|
|
$dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ && # do {...} while (...); // 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, $n) . "\n";
|
|
}
|
|
|
|
if ($dstat =~ /;/) {
|
|
ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
|
|
"Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
|
|
} else {
|
|
ERROR("COMPLEX_MACRO",
|
|
"Macros with complex values should be enclosed in parenthesis\n" . "$herectx");
|
|
}
|
|
}
|
|
}
|
|
|
|
# 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("MISSING_VMLINUX_SYMBOL",
|
|
"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 = ();
|
|
my $allow = 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;
|
|
|
|
$allowed[$allow] = 0;
|
|
#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<$allowed[$allow]>\n";
|
|
if (statement_lines($cond) > 1) {
|
|
#print "APW: ALLOWED: cond<$cond>\n";
|
|
$allowed[$allow] = 1;
|
|
}
|
|
if ($block =~/\b(?:if|for|while)\b/) {
|
|
#print "APW: ALLOWED: block<$block>\n";
|
|
$allowed[$allow] = 1;
|
|
}
|
|
if (statement_block_size($block) > 1) {
|
|
#print "APW: ALLOWED: lines block<$block>\n";
|
|
$allowed[$allow] = 1;
|
|
}
|
|
$allow++;
|
|
}
|
|
if ($seen) {
|
|
my $sum_allowed = 0;
|
|
foreach (@allowed) {
|
|
$sum_allowed += $_;
|
|
}
|
|
if ($sum_allowed == 0) {
|
|
WARN("BRACES",
|
|
"braces {} are not necessary for any arm of this statement\n" . $herectx);
|
|
} elsif ($sum_allowed != $allow &&
|
|
$seen != $allow) {
|
|
CHK("BRACES",
|
|
"braces {} should be used on all arms 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",
|
|
"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*\<$inc>@) {
|
|
ERROR("DEPRECATED_INCLUDE",
|
|
"Don't use <$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("DEPRECATED_FUNCTION",
|
|
"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("VOLATILE",
|
|
"Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
|
|
}
|
|
|
|
# sys_open/read/write/close are not allowed in the kernel
|
|
if ($line =~ /\b(sys_(?:open|read|write|close))\b/) {
|
|
ERROR("FILE_OPS", "$1 is inappropriate in kernel code.\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# filp_open is a backdoor for sys_open
|
|
if ($line =~ /\b(filp_open)\b/) {
|
|
ERROR("FILE_OPS", "$1 is inappropriate in kernel code.\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# read[bwl] & write[bwl] use too many barriers, use the _relaxed variants
|
|
if ($line =~ /\b((?:read|write)[bwl])\b/) {
|
|
ERROR("NON_RELAXED_IO",
|
|
"Use of $1 is deprecated: use $1_relaxed\n\t" .
|
|
"with appropriate memory barriers instead.\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# likewise, in/out[bwl] should be __raw_read/write[bwl]...
|
|
if ($line =~ /\b((in|out)([bwl]))\b/) {
|
|
my ($all, $pref, $suf) = ($1, $2, $3);
|
|
$pref =~ s/in/read/;
|
|
$pref =~ s/out/write/;
|
|
ERROR("NON_RELAXED_IO",
|
|
"Use of $all is deprecated: use " .
|
|
"__raw_$pref$suf\n\t" .
|
|
"with appropriate memory barriers instead.\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# dsb is too ARMish, and should usually be mb.
|
|
if ($line =~ /\bdsb\b/) {
|
|
WARN("ARM_BARRIER",
|
|
"Use of dsb is discouranged: prefer mb.\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# MSM - check if a non board-gpiomux file has any gpiomux declarations
|
|
if ($realfile =~ /\/mach-msm\/board-[0-9]+/ &&
|
|
$realfile !~ /camera/ && $realfile !~ /gpiomux/ &&
|
|
$line =~ /\s*struct msm_gpiomux_config\s*/ ) {
|
|
WARN("GPIOMUX_IN_BOARD",
|
|
"Non gpiomux board file cannot have a gpiomux config declarations. Please declare gpiomux configs in board-*-gpiomux.c file.\n" . $herecurr);
|
|
}
|
|
|
|
# MSM - check if vreg_xxx function are used
|
|
if ($line =~ /\b(vreg_(get|put|set_level|enable|disable))\b/) {
|
|
WARN("DEPRECATED_VREG_APIS", "Use of $1 API is deprecated: " .
|
|
"use regulator APIs\n" . $herecurr);
|
|
}
|
|
|
|
# unbounded string functions are overflow risks
|
|
my %str_fns = (
|
|
"sprintf" => "snprintf",
|
|
"strcpy" => "strlcpy",
|
|
"strncpy" => "strlcpy",
|
|
"strcat" => "strlcat",
|
|
"strncat" => "strlcat",
|
|
"vsprintf" => "vsnprintf",
|
|
"strchr" => "strnchr",
|
|
"strstr" => "strnstr",
|
|
);
|
|
foreach my $k (keys %str_fns) {
|
|
if ($line =~ /\b$k\b/) {
|
|
ERROR("UNBOUNDED_STRING_FNS",
|
|
"Use of $k is deprecated: " .
|
|
"use $str_fns{$k} instead.\n" .
|
|
$herecurr);
|
|
}
|
|
}
|
|
|
|
# warn about #if 0
|
|
if ($line =~ /^.\s*\#\s*if\s+0\b/) {
|
|
WARN("IF_0",
|
|
"if this code is redundant consider removing it\n"
|
|
. $herecurr);
|
|
}
|
|
|
|
# warn about #if 1
|
|
if ($line =~ /^.\s*\#\s*if\s+1\b/) {
|
|
WARN("IF_1",
|
|
"if this code is required consider removing"
|
|
. " #if 1\n" . $herecurr);
|
|
}
|
|
|
|
# check for needless kfree() checks
|
|
if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
|
|
my $expr = $1;
|
|
if ($line =~ /\bkfree\(\Q$expr\E\);/) {
|
|
WARN("NEEDLESS_KFREE",
|
|
"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("NEEDLESS_USB_FREE_URB",
|
|
"usb_free_urb(NULL) is safe this check is probably not required\n" . $hereprev);
|
|
}
|
|
}
|
|
|
|
# prefer usleep_range over udelay
|
|
if ($line =~ /\budelay\s*\(\s*(\w+)\s*\)/) {
|
|
# ignore udelay's < 10, however
|
|
if (! (($1 =~ /(\d+)/) && ($1 < 10)) ) {
|
|
CHK("USLEEP_RANGE",
|
|
"usleep_range is preferred over udelay; see Documentation/timers/timers-howto.txt\n" . $line);
|
|
}
|
|
}
|
|
|
|
# warn about unexpectedly long msleep's
|
|
if ($line =~ /\bmsleep\s*\((\d+)\);/) {
|
|
if ($1 < 20) {
|
|
WARN("MSLEEP",
|
|
"msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt\n" . $line);
|
|
}
|
|
}
|
|
|
|
# check the patch for use of mdelay
|
|
if ($line =~ /\bmdelay\s*\(/) {
|
|
WARN("MDELAY",
|
|
"use of mdelay() found: msleep() is the preferred API.\n" . $line );
|
|
}
|
|
|
|
# warn about #ifdefs in C files
|
|
# if ($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("SPACING",
|
|
"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("UNCOMMENTED_DEFINITION",
|
|
"$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",
|
|
"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("ARCH_DEFINES",
|
|
"architecture specific defines should be avoided\n" . $herecurr);
|
|
}
|
|
|
|
# Check that the storage class is at the beginning of a declaration
|
|
if ($line =~ /\b$Storage\b/ && $line !~ /^.\s*$Storage\b/) {
|
|
WARN("STORAGE_CLASS",
|
|
"storage class should be at the beginning of the declaration\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_LOCATION",
|
|
"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("INLINE",
|
|
"plain inline is preferred over $1\n" . $herecurr);
|
|
}
|
|
|
|
# Check for __attribute__ packed, prefer __packed
|
|
if ($line =~ /\b__attribute__\s*\(\s*\(.*\bpacked\b/) {
|
|
WARN("PREFER_PACKED",
|
|
"__packed is preferred over __attribute__((packed))\n" . $herecurr);
|
|
}
|
|
|
|
# Check for __attribute__ aligned, prefer __aligned
|
|
if ($line =~ /\b__attribute__\s*\(\s*\(.*aligned/) {
|
|
WARN("PREFER_ALIGNED",
|
|
"__aligned(size) is preferred over __attribute__((aligned(size)))\n" . $herecurr);
|
|
}
|
|
|
|
# Check for __attribute__ format(printf, prefer __printf
|
|
if ($line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf/) {
|
|
WARN("PREFER_PRINTF",
|
|
"__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr);
|
|
}
|
|
|
|
# Check for __attribute__ format(scanf, prefer __scanf
|
|
if ($line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\b/) {
|
|
WARN("PREFER_SCANF",
|
|
"__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr);
|
|
}
|
|
|
|
# check for sizeof(&)
|
|
if ($line =~ /\bsizeof\s*\(\s*\&/) {
|
|
WARN("SIZEOF_ADDRESS",
|
|
"sizeof(& should be avoided\n" . $herecurr);
|
|
}
|
|
|
|
# check for line continuations in quoted strings with odd counts of "
|
|
if ($rawline =~ /\\$/ && $rawline =~ tr/"/"/ % 2) {
|
|
WARN("LINE_CONTINUATIONS",
|
|
"Avoid line continuations in quoted strings\n" . $herecurr);
|
|
}
|
|
|
|
# Check for misused memsets
|
|
if ($^V && $^V ge 5.10.0 &&
|
|
defined $stat &&
|
|
$stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*$FuncArg\s*\)/s) {
|
|
|
|
my $ms_addr = $2;
|
|
my $ms_val = $7;
|
|
my $ms_size = $12;
|
|
|
|
if ($ms_size =~ /^(0x|)0$/i) {
|
|
ERROR("MEMSET",
|
|
"memset to 0's uses 0 as the 2nd argument, not the 3rd\n" . "$here\n$stat\n");
|
|
} elsif ($ms_size =~ /^(0x|)1$/i) {
|
|
WARN("MEMSET",
|
|
"single byte memset is suspicious. Swapped 2nd/3rd argument?\n" . "$here\n$stat\n");
|
|
}
|
|
}
|
|
|
|
# typecasts on min/max could be min_t/max_t
|
|
if ($^V && $^V ge 5.10.0 &&
|
|
defined $stat &&
|
|
$stat =~ /^\+(?:.*?)\b(min|max)\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) {
|
|
if (defined $2 || defined $7) {
|
|
my $call = $1;
|
|
my $cast1 = deparenthesize($2);
|
|
my $arg1 = $3;
|
|
my $cast2 = deparenthesize($7);
|
|
my $arg2 = $8;
|
|
my $cast;
|
|
|
|
if ($cast1 ne "" && $cast2 ne "" && $cast1 ne $cast2) {
|
|
$cast = "$cast1 or $cast2";
|
|
} elsif ($cast1 ne "") {
|
|
$cast = $cast1;
|
|
} else {
|
|
$cast = $cast2;
|
|
}
|
|
WARN("MINMAX",
|
|
"$call() should probably be ${call}_t($cast, $arg1, $arg2)\n" . "$here\n$stat\n");
|
|
}
|
|
}
|
|
|
|
# check for new externs in .c files.
|
|
if ($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("AVOID_EXTERNS",
|
|
"externs should be avoided in .c files\n" . $herecurr);
|
|
}
|
|
|
|
if ($paren_space =~ /\n/) {
|
|
WARN("FUNCTION_ARGUMENTS",
|
|
"arguments for function declarations should follow identifier\n" . $herecurr);
|
|
}
|
|
|
|
} elsif ($realfile =~ /\.c$/ && defined $stat &&
|
|
$stat =~ /^.\s*extern\s+/)
|
|
{
|
|
WARN("AVOID_EXTERNS",
|
|
"externs should be avoided in .c files\n" . $herecurr);
|
|
}
|
|
|
|
# checks for new __setup's
|
|
if ($rawline =~ /\b__setup\("([^"]*)"/) {
|
|
my $name = $1;
|
|
|
|
if (!grep(/$name/, @setup_docs)) {
|
|
CHK("UNDOCUMENTED_SETUP",
|
|
"__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# check for pointless casting of kmalloc return
|
|
if ($line =~ /\*\s*\)\s*[kv][czm]alloc(_node){0,1}\b/) {
|
|
WARN("UNNECESSARY_CASTS",
|
|
"unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
|
|
}
|
|
|
|
# check for multiple semicolons
|
|
if ($line =~ /;\s*;\s*$/) {
|
|
WARN("ONE_SEMICOLON",
|
|
"Statements terminations use 1 semicolon\n" . $herecurr);
|
|
}
|
|
|
|
# check for return codes on error paths
|
|
if ($line =~ /\breturn\s+-\d+/) {
|
|
ERROR("NO_ERROR_CODE",
|
|
"illegal return value, please use an error code\n" . $herecurr);
|
|
}
|
|
|
|
# check for gcc specific __FUNCTION__
|
|
if ($line =~ /__FUNCTION__/) {
|
|
WARN("USE_FUNC",
|
|
"__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
|
|
}
|
|
|
|
# check for use of yield()
|
|
if ($line =~ /\byield\s*\(\s*\)/) {
|
|
WARN("YIELD",
|
|
"Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n" . $herecurr);
|
|
}
|
|
|
|
# check for semaphores initialized locked
|
|
if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
|
|
WARN("CONSIDER_COMPLETION",
|
|
"consider using a completion\n" . $herecurr);
|
|
}
|
|
|
|
# recommend kstrto* over simple_strto* and strict_strto*
|
|
if ($line =~ /\b((simple|strict)_(strto(l|ll|ul|ull)))\s*\(/) {
|
|
WARN("CONSIDER_KSTRTO",
|
|
"$1 is obsolete, use k$3 instead\n" . $herecurr);
|
|
}
|
|
|
|
# check for __initcall(), use device_initcall() explicitly please
|
|
if ($line =~ /^.\s*__initcall\s*\(/) {
|
|
WARN("USE_DEVICE_INITCALL",
|
|
"please use device_initcall() instead of __initcall()\n" . $herecurr);
|
|
}
|
|
|
|
# check for various ops structs, ensure they are const.
|
|
my $struct_ops = qr{acpi_dock_ops|
|
|
address_space_operations|
|
|
backlight_ops|
|
|
block_device_operations|
|
|
dentry_operations|
|
|
dev_pm_ops|
|
|
dma_map_ops|
|
|
extent_io_ops|
|
|
file_lock_operations|
|
|
file_operations|
|
|
hv_ops|
|
|
ide_dma_ops|
|
|
intel_dvo_dev_ops|
|
|
item_operations|
|
|
iwl_ops|
|
|
kgdb_arch|
|
|
kgdb_io|
|
|
kset_uevent_ops|
|
|
lock_manager_operations|
|
|
microcode_ops|
|
|
mtrr_ops|
|
|
neigh_ops|
|
|
nlmsvc_binding|
|
|
pci_raw_ops|
|
|
pipe_buf_operations|
|
|
platform_hibernation_ops|
|
|
platform_suspend_ops|
|
|
proto_ops|
|
|
rpc_pipe_ops|
|
|
seq_operations|
|
|
snd_ac97_build_ops|
|
|
soc_pcmcia_socket_ops|
|
|
stacktrace_ops|
|
|
sysfs_ops|
|
|
tty_operations|
|
|
usb_mon_operations|
|
|
wd_ops}x;
|
|
if ($line !~ /\bconst\b/ &&
|
|
$line =~ /\bstruct\s+($struct_ops)\b/) {
|
|
WARN("CONST_STRUCT",
|
|
"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("NR_CPUS",
|
|
"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("PRINTF_L",
|
|
"\%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("IN_ATOMIC",
|
|
"do not use in_atomic in drivers\n" . $herecurr);
|
|
} elsif ($realfile !~ m@^kernel/@) {
|
|
WARN("IN_ATOMIC",
|
|
"use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# check for lockdep_set_novalidate_class
|
|
if ($line =~ /^.\s*lockdep_set_novalidate_class\s*\(/ ||
|
|
$line =~ /__lockdep_no_validate__\s*\)/ ) {
|
|
if ($realfile !~ m@^kernel/lockdep@ &&
|
|
$realfile !~ m@^include/linux/lockdep@ &&
|
|
$realfile !~ m@^drivers/base/core@) {
|
|
ERROR("LOCKDEP",
|
|
"lockdep_no_validate class is reserved for device->mutex.\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
if ($line =~ /debugfs_create_file.*S_IWUGO/ ||
|
|
$line =~ /DEVICE_ATTR.*S_IWUGO/ ) {
|
|
WARN("EXPORTED_WORLD_WRITABLE",
|
|
"Exporting world writable files is usually an error. Consider more restrictive permissions.\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("NOT_UNIFIED_DIFF",
|
|
"Does not appear to be a unified-diff format patch\n");
|
|
}
|
|
if ($is_patch && $chk_signoff && $signoff == 0) {
|
|
ERROR("MISSING_SIGN_OFF",
|
|
"Missing Signed-off-by: line(s)\n");
|
|
}
|
|
|
|
print report_dump();
|
|
if ($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 ($quiet == 0);
|
|
}
|
|
|
|
if ($quiet == 0) {
|
|
|
|
if ($^V lt 5.10.0) {
|
|
print("NOTE: perl $^V is not modern enough to detect all possible issues.\n");
|
|
print("An upgrade to at least perl v5.10.0 is suggested.\n\n");
|
|
}
|
|
|
|
# If there were whitespace errors which cleanpatch can fix
|
|
# then suggest that.
|
|
if ($rpt_cleaners) {
|
|
print "NOTE: whitespace errors detected, you may wish to use scripts/cleanpatch or\n";
|
|
print " scripts/cleanfile\n\n";
|
|
$rpt_cleaners = 0;
|
|
}
|
|
}
|
|
|
|
if ($quiet == 0 && keys %ignore_type) {
|
|
print "NOTE: Ignored message types:";
|
|
foreach my $ignore (sort keys %ignore_type) {
|
|
print " $ignore";
|
|
}
|
|
print "\n\n";
|
|
}
|
|
|
|
if ($clean == 1 && $quiet == 0) {
|
|
print "$vname has no obvious style problems and is ready for submission.\n"
|
|
}
|
|
if ($clean == 0 && $quiet == 0) {
|
|
print << "EOM";
|
|
$vname has style problems, please review.
|
|
|
|
If any of these errors are false positives, please report
|
|
them to the maintainer, see CHECKPATCH in MAINTAINERS.
|
|
EOM
|
|
}
|
|
|
|
return $clean;
|
|
}
|