Commit | Line | Data |
---|---|---|
c56bc161 LT |
1 | #!perl -w |
2 | ||
3 | BEGIN { | |
4 | require './test.pl'; | |
d3da9911 | 5 | skip_all_if_miniperl(); |
62f78998 | 6 | skip_all_without_config(qw(d_fork)); |
c56bc161 LT |
7 | } |
8 | ||
9 | use strict; | |
10 | use constant TRUE => ($^X, '-e', 'exit 0'); | |
11 | use Data::Dumper; | |
12 | ||
13 | plan tests => 4; | |
14 | ||
15 | SKIP: { | |
d3da9911 | 16 | skip 'Platform doesn\'t support SIGCHLD', 4 if not exists $SIG{CHLD}; |
c56bc161 LT |
17 | require POSIX; |
18 | require Time::HiRes; | |
19 | ||
c5e8d5cb LT |
20 | my @pids; |
21 | $SIG{CHLD} = sub { | |
22 | while ((my $child = waitpid(-1, POSIX::WNOHANG())) > 0) { | |
23 | note "Reaped: $child"; | |
24 | push @pids, $child; | |
25 | } | |
26 | }; | |
c56bc161 LT |
27 | my $pid = fork // die "Can't fork: $!"; |
28 | unless ($pid) { | |
29 | note("Child PID: $$"); | |
30 | Time::HiRes::sleep(0.250); | |
31 | POSIX::_exit(0); | |
32 | } | |
33 | ||
34 | test_system('without reaper'); | |
35 | ||
c56bc161 LT |
36 | test_system('with reaper'); |
37 | ||
38 | note("Waiting briefly for SIGCHLD..."); | |
39 | Time::HiRes::sleep(0.500); | |
40 | ||
41 | ok(@pids == 1, 'Reaped only one process'); | |
42 | ok($pids[0] == $pid, "Reaped the right process.") or diag(Dumper(\@pids)); | |
43 | } | |
44 | ||
45 | sub test_system { | |
46 | my $subtest = shift; | |
47 | ||
48 | my $expected_zeroes = 10; | |
49 | my $got_zeroes = 0; | |
50 | ||
51 | # This test is looking for a race between system()'s waitpid() and a | |
52 | # signal handler. Looping a few times increases the chances of | |
53 | # catching the error. | |
54 | ||
55 | for (1..$expected_zeroes) { | |
56 | $got_zeroes++ unless system(TRUE); | |
57 | } | |
58 | ||
59 | is( | |
60 | $got_zeroes, $expected_zeroes, | |
61 | "system() $subtest succeeded $got_zeroes times out of $expected_zeroes" | |
62 | ); | |
63 | } | |
64 |