1 package Test::Valgrind;
10 use Perl::Destruct::Level level => 3;
12 use Test::Valgrind::Suppressions;
16 Test::Valgrind - Test Perl code through valgrind.
24 our $VERSION = '0.04';
29 eval 'use Test::Valgrind';
30 plan skip_all => 'Test::Valgrind is required to test your distribution with valgrind' if $@;
32 # Code to inspect for memory leaks/errors.
36 This module lets you run some code through the B<valgrind> memory debugger, to test it for memory errors and leaks. Just add C<use Test::Valgrind> at the beginning of the code you want to test. Behind the hood, C<Test::Valgrind::import> forks so that the child can basically C<exec 'valgrind', $^X, $0> (except that of course C<$0> isn't right there). The parent then parses the report output by valgrind and pass or fail tests accordingly.
38 You can also use it from the command-line to test a given script :
40 perl -MTest::Valgrind leaky.pl
44 You can pass parameters to C<import> as a list of key / value pairs, where valid keys are :
48 =item C<< supp => $file >>
50 Also use suppressions from C<$file> besides perl's.
52 =item C<< no_supp => $bool >>
54 If true, do not use any suppressions.
56 =item C<< callers => $number >>
58 Specify the maximum stack depth studied when valgrind encounters an error. Raising this number improves granularity. Default is 12.
60 =item C<< extra => [ @args ] >>
62 Add C<@args> to valgrind parameters.
64 =item C<< diag => $bool >>
66 If true, print the raw output of valgrind as diagnostics (may be quite verbose).
68 =item C<< no_test => $bool >>
70 If true, do not actually output the plan and the tests results.
80 croak 'Optional arguments must be passed as key => value pairs' if @_ % 2;
82 if (!defined $args{run} && !$run) {
86 $next = (caller $l++)[1];
87 last unless defined $next;
90 return if not $file or $file eq '-e';
91 my $callers = $args{callers};
92 $callers = 12 unless defined $callers;
93 $callers = int $callers;
94 my $vg = Test::Valgrind::Suppressions::VG_PATH;
95 if (!$vg || !-x $vg) {
96 for (split /:/, $ENV{PATH}) {
104 plan skip_all => 'No valgrind executable could be found in your path';
108 pipe my $rdr, my $wtr or croak "pipe(\$rdr, \$wtr): $!";
112 } elsif ($pid == 0) {
113 setpgrp 0, 0 or croak "setpgrp(0, 0): $!";
114 close $rdr or croak "close(\$rdr): $!";
115 open STDERR, '>&', $wtr or croak "open(STDERR, '>&', \$wtr): $!";
119 '--leak-resolution=high',
120 '--num-callers=' . $callers,
123 unless ($args{no_supp}) {
124 for (Test::Valgrind::Suppressions::supp_path(), $args{supp}) {
125 push @args, '--suppressions=' . $_ if $_;
128 if (defined $args{extra} and ref $args{extra} eq 'ARRAY') {
129 push @args, @{$args{extra}};
132 push @args, '-I' . $_ for @INC;
133 push @args, '-MTest::Valgrind=run,1', $file;
134 print STDERR "valgrind @args\n" if $args{diag};
135 local $ENV{PERL_DESTRUCT_LEVEL} = 3;
136 local $ENV{PERL_DL_NONLAZY} = 1;
139 close $wtr or croak "close(\$wtr): $!";
140 local $SIG{INT} = sub { kill -(SIGTERM) => $pid };
141 plan tests => 5 unless $args{no_test};
144 'definitely lost', 'indirectly lost', 'possibly lost', 'still reachable'
146 my %res = map { $_ => 0 } @tests;
148 diag $_ if $args{diag};
149 if (/^=+\d+=+\s*FATAL\s*:\s*(.*)/) {
151 diag "Valgrind error: $err";
152 $res{$_} = undef for @tests;
154 if (/ERROR\s+SUMMARY\s*:\s+(\d+)/) {
155 $res{errors} = int $1;
156 } elsif (/([a-z][a-z\s]*[a-z])\s*:\s*([\d.,]+)/) {
157 my ($cat, $count) = ($1, $2);
158 if (exists $res{$cat}) {
161 $res{$cat} = int $count;
168 is($res{$_}, 0, 'valgrind ' . $_) unless $args{no_test};
169 ++$failed if defined $res{$_} and $res{$_} != 0;
179 You can't use this module to test code given by the C<-e> command-line switch.
181 Results will most likely be better if your perl is built with debugging enabled. Using the latest valgrind available will also help.
183 This module is not really secure. It's definitely not taint safe. That shouldn't be a problem for test files.
185 If your tests output to STDERR, everything will be eaten in the process. In particular, running this module against test files will obliterate their original test results.
189 Valgrind 3.1.0 (L<http://valgrind.org>).
191 L<Carp>, L<POSIX> (core modules since perl 5) and L<Test::More> (since 5.6.2).
193 L<Perl::Destruct::Level>.
197 Vincent Pit, C<< <perl at profvince.com> >>, L<http://www.profvince.com>.
199 You can contact me by mail or on #perl @ FreeNode (vincent or Prof_Vince).
203 Please report any bugs or feature requests to C<bug-test-valgrind at rt.cpan.org>, or through the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Valgrind>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
207 You can find documentation for this module with the perldoc command.
209 perldoc Test::Valgrind
211 =head1 ACKNOWLEDGEMENTS
213 Rafaƫl Garcia-Suarez, for writing and instructing me about the existence of L<Perl::Destruct::Level> (Elizabeth Mattijsen is a close second).
215 H.Merijn Brand, for daring to test this thing.
217 =head1 COPYRIGHT & LICENSE
219 Copyright 2008 Vincent Pit, all rights reserved.
221 This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
225 1; # End of Test::Valgrind