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Diffstat (limited to 'lib/Lintian/Check/Libraries/Static.pm')
| -rw-r--r-- | lib/Lintian/Check/Libraries/Static.pm | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Libraries/Static.pm b/lib/Lintian/Check/Libraries/Static.pm new file mode 100644 index 0000000..72c8b97 --- /dev/null +++ b/lib/Lintian/Check/Libraries/Static.pm @@ -0,0 +1,121 @@ +# libraries/static -- lintian check script -*- perl -*- + +# Copyright (C) 1998 Christian Schwarz and Richard Braakman +# Copyright (C) 2012 Kees Cook +# Copyright (C) 2017-2020 Chris Lamb <lamby@debian.org> +# Copyright (C) 2021 Felix Lechner +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, you can find it on the World Wide +# Web at https://www.gnu.org/copyleft/gpl.html, or write to the Free +# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, +# MA 02110-1301, USA. + +package Lintian::Check::Libraries::Static; + +use v5.20; +use warnings; +use utf8; + +use Const::Fast; +use List::Compare; +use List::SomeUtils qw(any none uniq); + +use Moo; +use namespace::clean; + +with 'Lintian::Check'; + +const my $SPACE => q{ }; +const my $LEFT_PARENTHESIS => q{(}; +const my $RIGHT_PARENTHESIS => q{)}; + +sub visit_installed_files { + my ($self, $item) = @_; + + return + unless $item->is_file; + + return + unless $item->file_type =~ m{ \b current [ ] ar [ ] archive \b }x; + + my @unstripped_members; + my %stripped_sections_by_member; + + for my $member_name (keys %{$item->elf_by_member}) { + + my $member_elf = $item->elf_by_member->{$member_name}; + + my @elf_sections = values %{$member_elf->{'SECTION-HEADERS'}}; + my @have_section_names = map { $_->name } @elf_sections; + + # These are the ones file(1) looks for. The ".zdebug_info" being the + # compressed version of .debug_info. + # - Technically, file(1) also looks for .symtab, but that is apparently + # not strippable for static libs. Accordingly, it is omitted below. + my @KNOWN_DEBUG_SECTION_NAMES = qw{.debug_info .zdebug_info}; + my $lc_debug = List::Compare->new(\@have_section_names, + \@KNOWN_DEBUG_SECTION_NAMES); + + my @have_debug_sections = $lc_debug->get_intersection; + + if (@have_debug_sections) { + + push(@unstripped_members, $member_name); + next; + } + + my @KNOWN_STRIPPED_SECTION_NAMES = qw{.note .comment}; + my $lc_stripped = List::Compare->new(\@have_section_names, + \@KNOWN_STRIPPED_SECTION_NAMES); + + my @have_stripped_sections = $lc_stripped->get_intersection; + + $stripped_sections_by_member{$member_name} //= []; + push( + @{$stripped_sections_by_member{$member_name}}, + @have_stripped_sections + ); + } + + $self->pointed_hint('unstripped-static-library', $item->pointer, + $LEFT_PARENTHESIS + . join($SPACE, sort +uniq @unstripped_members) + . $RIGHT_PARENTHESIS) + if @unstripped_members + && $item->name !~ m{ _g [.]a $}x; + + # "libfoo_g.a" is usually a "debug" library, so ignore + # unneeded sections in those. + for my $member (keys %stripped_sections_by_member) { + + $self->pointed_hint( + 'static-library-has-unneeded-sections', + $item->pointer, + "($member)", + join($SPACE, sort +uniq @{$stripped_sections_by_member{$member}}) + ) + if @{$stripped_sections_by_member{$member}} + && $item->name !~ m{ _g [.]a $}x; + } + + return; +} + +1; + +# Local Variables: +# indent-tabs-mode: nil +# cperl-indent-level: 4 +# End: +# vim: syntax=perl sw=4 sts=4 sr et |