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#! /usr/bin/perl -w
eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
if 0; #$running_under_some_shell
use strict;
use File::Find ();
use Data::Dumper;
# Set the variable $File::Find::dont_use_nlink if you're using AFS,
# since AFS cheats.
# for the convenience of &wanted calls, including -eval statements:
use vars qw/*name *dir *prune/;
*name = *File::Find::name;
*dir = *File::Find::dir;
*prune = *File::Find::prune;
sub wanted;
sub unique {
my @in = @_;
my @ret = ();
for my $x (@in) {
push @ret, $x if (! grep /$x/, @ret);
}
return @ret;
}
my $functions = {};
my $p = $ARGV[0];
# Traverse desired filesystems
-d $p && File::Find::find({wanted => \&wanted}, $p);
foreach my $function (keys %$functions) {
potential_errors($function);
}
foreach my $name (sort (keys %$functions)) {
my $record = $functions->{$name};
next if $record->{'return-type'} !~ /\bg?int\b/ || $record->{'return-type'} =~ /\bstatic\b/;
my @derr = @{$record->{'errors'}};
my @inherr = @{$record->{'inherited-errors'}[0]};
my $path = $record->{'file'};
print "$name ";
my %temp = ();
@temp{@inherr} = ();
for (@derr) {
delete $temp{$_};
print "$_ ";
}
if (keys %temp) {
foreach (keys %temp) {
print "$_ ";
}
}
print "\n";
}
exit;
sub potential_errors {
my $function = shift;
return ([],[[],[]]) if ! exists $functions->{$function};
my $record = $functions->{$function};
return ([],[[],[]]) if $record->{'return-type'} !~ /\bg?int\b/ || $record->{'recursing'};
if (! exists $record->{'inherited-errors'}) {
my @inheritederrors;
my @froms;
$record->{'recursing'} = 1;
foreach my $call (@{$record->{'calls'}}) {
my ($err,$inh) = potential_errors($call);
my ($suberr,$subfrom) = @$inh;
if (@$err || @$suberr) {
push @froms, $call;
push @inheritederrors, (@$err, @$suberr);
}
}
$record->{'inherited-errors'} = [[ unique(@inheritederrors) ],[@froms]];
delete $record->{'recursing'};
}
return ($record->{'errors'},$record->{'inherited-errors'});
}
sub parse_file {
my $file = shift;
my $path = shift;
my $lastline;
my $curfunction;
my $curtype;
my @curerrors;
my @curcalls;
my $infunction = 0;
open FD, "<$file";
while (<FD>) {
MATCHING: {
if ($infunction) {
if (/^\}/) {
#print "finished funcctions $curfunction\n";
$functions->{$curfunction} = { name => $curfunction, 'return-type' => $curtype, 'errors' => [ unique(@curerrors) ], 'calls' => [ @curcalls], 'file' => $path};
$infunction = 0;
last MATCHING;
}
while (/(?:\breturn\b|=).*?([A-Za-z_]+)\(/g) {
push @curcalls, $1;
}
pos = 0;
while (/(LASSO_[A-Z_]*_ERROR_[A-Z_]*|LASSO_ERROR_[A-Z_]*)/g) {
push @curerrors, $1;
}
last MATCHING;
}
if (/^([a-z_]+)\([^;]*$/) {
$curfunction = $1;
chop $lastline;
$curtype = $lastline;
@curerrors = ();
@curcalls = ();
last MATCHING;
}
if ($curfunction && /^\{/) {
$infunction = 1;
last MATCHING;
}
}
$lastline = $_;
}
close FD;
}
sub wanted {
my ($dev,$ino,$mode,$nlink,$uid,$gid);
parse_file($_,$File::Find::name) if ($_ =~ /^.*\.c$/s && $File::Find::name !~ /^.*\.svn.*/);
}
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