xref: /openbsd/gnu/usr.bin/perl/dist/Storable/t/huge.t (revision 3cab2bb3) 
1#!./perl
2
3use strict;
4use warnings;
5
6use Config;
7use Storable qw(dclone);
8use Test::More;
9
10BEGIN {
11    plan skip_all => 'Storable was not built'
12        if $ENV{PERL_CORE} && $Config{'extensions'} !~ /\b Storable \b/x;
13    plan skip_all => 'Need 64-bit pointers for this test'
14        if $Config{ptrsize} < 8 and $] > 5.013;
15    plan skip_all => 'Need 64-bit int for this test on older versions'
16        if $Config{uvsize} < 8 and $] < 5.013;
17    plan skip_all => 'Need ~4 GiB memory for this test, set PERL_TEST_MEMORY > 4'
18        if !$ENV{PERL_TEST_MEMORY} || $ENV{PERL_TEST_MEMORY} < 4;
19}
20
21# Just too big to fit in an I32.
22my $huge = int(2 ** 31);
23# v5.24.1c/v5.25.1c switched to die earlier with "Too many elements",
24# which is much safer.
25my $has_too_many = ($Config{usecperl} and
26      (($] >= 5.024001 and $] < 5.025000)
27       or $] >= 5.025001)) ? 1 : 0;
28
29# These overlarge sizes are enabled only since Storable 3.00 and some
30# cases need cperl support. Perl5 (as of 5.24) has some internal
31# problems with >I32 sizes, which only cperl has fixed.
32# perl5 is not yet 2GB safe, esp. with hashes.
33
34# string len (xpv_cur): STRLEN (ptrsize>=8)
35# array size (xav_max): SSize_t (I32/I64) (ptrsize>=8)
36# hash size (xhv_keys):
37#    IV            - 5.12   (ivsize>=8)
38#    STRLEN  5.14  - 5.24   (size_t: U32/U64)
39#    SSize_t 5.22c - 5.24c  (I32/I64)
40#    U32     5.25c -
41# hash key: I32
42
43my @cases = (
44    ['huge string',
45     sub { my $s = 'x' x $huge; \$s }],
46
47    ['array with huge element',
48     sub { my $s = 'x' x $huge; [$s] }],
49
50    ['hash with huge value',
51     sub { my $s = 'x' x $huge; +{ foo => $s } }],
52
53    # There's no huge key, limited to I32.
54  ) if $Config{ptrsize} > 4;
55
56
57# An array with a huge number of elements requires several gigabytes of
58# virtual memory. On darwin it is evtl killed.
59if ($Config{ptrsize} > 4 and !$has_too_many) {
60    # needs 20-55G virtual memory, 4.6M heap and several minutes on a fast machine
61    if ($ENV{PERL_TEST_MEMORY} >= 55) {
62        push @cases,
63          [ 'huge array',
64            sub { my @x; $x[$huge] = undef; \@x } ];
65    } else {
66        diag "skip huge array, need PERL_TEST_MEMORY >= 8";
67    }
68}
69
70# A hash with a huge number of keys would require tens of gigabytes of
71# memory, which doesn't seem like a good idea even for this test file.
72# Unfortunately even older 32bit perls do allow this.
73if (!$has_too_many) {
74    # needs >90G virtual mem, and is evtl. killed
75    if ($ENV{PERL_TEST_MEMORY} >= 96) {
76        # number of keys >I32. impossible to handle with perl5, but Storable can.
77        push @cases,
78          ['huge hash',
79           sub { my %x = (0 .. $huge); \%x } ];
80    } else {
81        diag "skip huge hash, need PERL_TEST_MEMORY >= 16";
82    }
83}
84
85
86plan tests => 2 * scalar @cases;
87
88for (@cases) {
89    my ($desc, $build) = @$_;
90    diag "building test input: $desc";
91    my ($input, $exn, $clone);
92    diag "these huge subtests need a lot of memory and time!" if $desc eq 'huge array';
93    $input = $build->();
94    diag "running test: $desc";
95    $exn = $@ if !eval { $clone = dclone($input); 1 };
96
97    is($exn, undef, "$desc no exception");
98    is_deeply($input, $clone, "$desc cloned");
99    #ok($clone, "$desc cloned");
100
101    # Ensure the huge objects are freed right now:
102    undef $input;
103    undef $clone;
104}
105