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 | ||
20 | my $pid = fork // die "Can't fork: $!"; | |
21 | unless ($pid) { | |
22 | note("Child PID: $$"); | |
23 | Time::HiRes::sleep(0.250); | |
24 | POSIX::_exit(0); | |
25 | } | |
26 | ||
27 | test_system('without reaper'); | |
28 | ||
29 | my @pids; | |
30 | $SIG{CHLD} = sub { | |
31 | while ((my $child = waitpid(-1, POSIX::WNOHANG())) > 0) { | |
32 | note "Reaped: $child"; | |
33 | push @pids, $child; | |
34 | } | |
35 | }; | |
36 | ||
37 | test_system('with reaper'); | |
38 | ||
39 | note("Waiting briefly for SIGCHLD..."); | |
40 | Time::HiRes::sleep(0.500); | |
41 | ||
42 | ok(@pids == 1, 'Reaped only one process'); | |
43 | ok($pids[0] == $pid, "Reaped the right process.") or diag(Dumper(\@pids)); | |
44 | } | |
45 | ||
46 | sub test_system { | |
47 | my $subtest = shift; | |
48 | ||
49 | my $expected_zeroes = 10; | |
50 | my $got_zeroes = 0; | |
51 | ||
52 | # This test is looking for a race between system()'s waitpid() and a | |
53 | # signal handler. Looping a few times increases the chances of | |
54 | # catching the error. | |
55 | ||
56 | for (1..$expected_zeroes) { | |
57 | $got_zeroes++ unless system(TRUE); | |
58 | } | |
59 | ||
60 | is( | |
61 | $got_zeroes, $expected_zeroes, | |
62 | "system() $subtest succeeded $got_zeroes times out of $expected_zeroes" | |
63 | ); | |
64 | } | |
65 |