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#!perl
################################################################################
#
# $Revision: 6 $
# $Author: mhx $
# $Date: 2010/03/07 16:01:42 +0100 $
#
################################################################################
#
# Version 2.x, Copyright (C) 2007-2010, Marcus Holland-Moritz <mhx@cpan.org>.
# Version 1.x, Copyright (C) 1999, Graham Barr <gbarr@pobox.com>.
#
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
################################################################################
BEGIN {
chdir 't' if -d 't';
require "./test.pl";
set_up_inc('../lib') if -d '../lib' && -d '../ext';
require Config; Config->import;
if ($ENV{'PERL_CORE'} && $Config{'extensions'} !~ m[\bIPC/SysV\b]) {
skip_all('-- IPC::SysV was not built');
}
skip_all_if_miniperl();
if ($Config{'d_shm'} ne 'define') {
skip_all('-- $Config{d_shm} undefined');
}
}
use sigtrap qw/die normal-signals error-signals/;
use IPC::SysV qw/ IPC_PRIVATE S_IRWXU IPC_RMID /;
my $key;
END { shmctl $key, IPC_RMID, 0 if defined $key }
{
local $SIG{SYS} = sub { skip_all("SIGSYS caught") } if exists $SIG{SYS};
$key = shmget IPC_PRIVATE, 8, S_IRWXU;
}
if (not defined $key) {
my $info = "shmget() failed: $!";
if ($! == &IPC::SysV::ENOSPC || $! == &IPC::SysV::ENOSYS ||
$! == &IPC::SysV::ENOMEM || $! == &IPC::SysV::EACCES) {
skip_all($info);
}
else {
die $info;
}
}
else {
plan(tests => 33);
pass('acquired shared mem');
}
ok(shmwrite($key, pack("N", 4711), 0, 4), 'write(offs=0)');
ok(shmwrite($key, pack("N", 210577), 4, 4), 'write(offs=4)');
my $var;
ok(shmread($key, $var, 0, 4), 'read(offs=0) returned ok');
is($var, pack("N", 4711), 'read(offs=0) correct');
ok(shmread($key, $var, 4, 4), 'read(offs=4) returned ok');
is($var, pack("N", 210577), 'read(offs=4) correct');
ok(shmwrite($key, "Shared", 1, 6), 'write(offs=1)');
ok(shmread($key, $var, 1, 6), 'read(offs=1) returned ok');
is($var, 'Shared', 'read(offs=1) correct');
ok(shmwrite($key,"Memory", 0, 6), 'write(offs=0)');
my $number = 1;
my $int = 2;
shmwrite $key, $int, 0, 1;
shmread $key, $number, 0, 1;
is("$number", $int, qq{"\$id" eq "$int"});
cmp_ok($number + 0, '==', $int, "\$id + 0 == $int");
my ($fetch, $store) = (0, 0);
{ package Counted;
sub TIESCALAR { bless [undef] }
sub FETCH { ++$fetch; $_[0][0] }
sub STORE { ++$store; $_[0][0] = $_[1] } }
tie my $ct, 'Counted';
shmread $key, $ct, 0, 1;
is($fetch, 0, "shmread FETCH none");
is($store, 1, "shmread STORE once");
($fetch, $store) = (0, 0);
shmwrite $key, $ct, 0, 1;
is($fetch, 1, "shmwrite FETCH once");
is($store, 0, "shmwrite STORE none");
{
# check reading into an upgraded buffer is sane
my $text = "\xC0\F0AB";
ok(shmwrite($key, $text, 0, 4), "setup text");
my $rdbuf = "\x{101}";
ok(shmread($key, $rdbuf, 0, 4), "read it back");
is($rdbuf, $text, "check we got back the expected");
# check writing from an upgraded buffer
utf8::upgrade(my $utext = $text);
ok(shmwrite($key, $utext, 0, 4), "setup text (upgraded source)");
$rdbuf = "";
ok(shmread($key, $rdbuf, 0, 4), "read it back (upgraded source)");
is($rdbuf, $text, "check we got back the expected (upgraded source)");
}
# GH #22898 - reading into reference is sane
{
my $rdbuf = [];
builtin::weaken(my $wref = $rdbuf);
my $text = 'A';
ok(shmwrite($key, $text, 0, 1), "wrote 'A' to shared segment");
ok(shmread($key, $rdbuf, 0, 1), "read 1 byte into buffer that previously stored a ref");
is(ref($rdbuf), '', "buffer is not a reference anymore");
is($rdbuf, $text, "buffer contains expected string");
is($wref, undef, "no leak: referenced object had refcount decremented");
}
# GH #22895 - 2^31 boundary
SKIP: {
skip("need at least 5GB of memory for this test", 5)
unless ($ENV{PERL_TEST_MEMORY} // 0) >= 5;
# delete previous allocation
shmctl $key, IPC_RMID, 0;
$key = undef;
my $int32_max = 0x7fff_ffff;
$key = shmget(IPC_PRIVATE, $int32_max+2, S_IRWXU) // die "shmget(2GB+1) failed: $!";
my $bigbuf = 'A' x $int32_max;
ok(shmwrite($key, $bigbuf, 0, length($bigbuf)), "wrote $int32_max bytes");
$bigbuf .= 'X';
ok(shmwrite($key, $bigbuf, 0, length($bigbuf)), "wrote $int32_max+1 bytes");
my $smallbuf = 'X';
ok(shmwrite($key, $smallbuf, $int32_max, 1), "wrote 1 byte at offset $int32_max");
ok(shmwrite($key, $smallbuf, $int32_max+1, 1), "wrote 1 byte at offset $int32_max+1");
my $int30x = 0x4000_0000;
ok(shmwrite($key, $bigbuf, $int30x, $int30x), "wrote $int30x bytes at offset $int30x");
}
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