#!./perl
#
# various typeglob tests
#
BEGIN {
chdir 't' if -d 't';
require './test.pl';
set_up_inc('../lib');
}
use warnings;
plan( tests => 271 );
# type coercion on assignment
$foo = 'foo';
$bar = *main::foo;
$bar = $foo;
is(ref(\$bar), 'SCALAR');
$foo = *main::bar;
# type coercion (not) on misc ops
ok($foo);
is(ref(\$foo), 'GLOB');
unlike ($foo, qr/abcd/);
is(ref(\$foo), 'GLOB');
is($foo, '*main::bar');
is(ref(\$foo), 'GLOB');
{
no warnings;
${\*$foo} = undef;
is(ref(\$foo), 'GLOB', 'no type coercion when assigning to *{} retval');
$::{phake} = *bar;
is(
\$::{phake}, \*{"phake"},
'symbolic *{} returns symtab entry when FAKE'
);
${\*{"phake"}} = undef;
is(
ref(\$::{phake}), 'GLOB',
'no type coercion when assigning to retval of symbolic *{}'
);
$::{phaque} = *bar;
eval '
is(
\$::{phaque}, \*phaque,
"compile-time *{} returns symtab entry when FAKE"
);
${\*phaque} = undef;
';
is(
ref(\$::{phaque}), 'GLOB',
'no type coercion when assigning to retval of compile-time *{}'
);
}
# type coercion on substitutions that match
$a = *main::foo;
$b = $a;
$a =~ s/^X//;
is(ref(\$a), 'GLOB');
$a =~ s/^\*//;
is($a, 'main::foo');
is(ref(\$b), 'GLOB');
# typeglobs as lvalues
substr($foo, 0, 1) = "XXX";
is(ref(\$foo), 'SCALAR');
is($foo, 'XXXmain::bar');
# returning glob values
sub foo {
local($bar) = *main::foo;
$foo = *main::bar;
return ($foo, $bar);
}
($fuu, $baa) = foo();
ok(defined $fuu);
is(ref(\$fuu), 'GLOB');
ok(defined $baa);
is(ref(\$baa), 'GLOB');
# nested package globs
# NOTE: It's probably OK if these semantics change, because the
# fact that %X::Y:: is stored in %X:: isn't documented.
# (I hope.)
{ package Foo::Bar; no warnings 'once'; $test=1; }
ok(exists $Foo::{'Bar::'});
is($Foo::{'Bar::'}, '*Foo::Bar::');
# test undef operator clearing out entire glob
$foo = 'stuff';
@foo = qw(more stuff);
%foo = qw(even more random stuff);
undef *foo;
is ($foo, undef);
is (scalar @foo, 0);
is (scalar %foo, 0);
{
# test warnings from assignment of undef to glob
my $msg = '';
local $SIG{__WARN__} = sub { $msg = $_[0] };
use warnings;
*foo = 'bar';
is($msg, '');
*foo = undef;
like($msg, qr/Undefined value assigned to typeglob/);
no warnings 'once';
# test warnings for converting globs to other forms
my $copy = *PWOMPF;
foreach ($copy, *SKREEE) {
$msg = '';
my $victim = sprintf "%d", $_;
like($msg, qr/Argument "\*main::[A-Z]{6}" isn't numeric in sprintf/,
"Warning on conversion to IV");
is($victim, 0);
$msg = '';
$victim = sprintf "%u", $_;
like($msg, qr/Argument "\*main::[A-Z]{6}" isn't numeric in sprintf/,
"Warning on conversion to UV");
is($victim, 0);
$msg = '';
$victim = sprintf "%e", $_;
like($msg, qr/Argument "\*main::[A-Z]{6}" isn't numeric in sprintf/,
"Warning on conversion to NV");
like($victim, qr/^0\.0+E\+?00/i, "Expect floating point zero");
$msg = '';
$victim = sprintf "%s", $_;
is($msg, '', "No warning on stringification");
is($victim, '' . $_);
}
}
my $test = curr_test();
# test *glob{THING} syntax
$x = "ok $test\n";
++$test;
@x = ("ok $test\n");
++$test;
%x = ("ok $test" => "\n");
++$test;
sub x { "ok $test\n" }
print ${*x{SCALAR}}, @{*x{ARRAY}}, %{*x{HASH}}, &{*x{CODE}};
# This needs to go here, after the print, as sub x will return the current
# value of test
++$test;
format x =
XXX This text isn't used. Should it be?
.
curr_test($test);
is (ref *x{FORMAT}, "FORMAT");
is ("@{sub { *_{ARRAY} }->(1..3)}", "1 2 3",
'returning *_{ARRAY} from sub');
*x = *STDOUT;
is (*{*x{GLOB}}, "*main::STDOUT");
{
my $test = curr_test();
print {*x{IO}} "ok $test\n";
++$test;
my $warn;
local $SIG{__WARN__} = sub {
$warn .= $_[0];
};
my $val = *x{FILEHANDLE};
print {*x{IO}} ($warn =~ /is deprecated/
? "ok $test\n" : "not ok $test\n");
curr_test(++$test);
}
is *x{NAME}, 'x', '*foo{NAME}';
is *x{PACKAGE}, 'main', '*foo{PACKAGE}';
{ no warnings 'once'; *x = *Foo::y; }
is *x, '*Foo::y', 'glob stringifies as assignee after glob-to-glob assign';
is *x{NAME}, 'x', 'but *foo{NAME} still returns the original name';
is *x{PACKAGE}, 'main', 'and *foo{PACKAGE} the original package';
{
# test if defined() doesn't create any new symbols
my $a = "SYM000";
ok(!defined *{$a});
ok(!defined ${$a});
ok(!defined *{$a});
ok(!defined &{$a});
ok(!defined *{$a});
my $state = "not";
*{$a} = sub { $state = "ok" };
ok(defined &{$a});
ok(defined *{$a});
&{$a};
is ($state, 'ok');
}
{
# although it *should* if you're talking about magicals
my $a = "]";
ok(defined *{$a});
ok(defined ${$a});
$a = "1";
"o" =~ /(o)/;
ok(${$a});
ok(defined *{$a});
$a = "2";
ok(!${$a});
ok(defined *{$a});
$a = "1x";
ok(!defined ${$a});
ok(!defined *{$a});
$a = "11";
"o" =~ /(((((((((((o)))))))))))/;
ok(${$a});
ok(defined *{$a});
}
# [ID 20010526.001] localized glob loses value when assigned to
$j=1; %j=(a=>1); @j=(1); local *j=*j; *j = sub{};
is($j, 1);
is($j{a}, 1);
is($j[0], 1);
{
# does pp_readline() handle glob-ness correctly?
my $g = *foo;
$g = <DATA>;
is ($g, "Perl\n");
}
{
my $w = '';
local $SIG{__WARN__} = sub { $w = $_[0] };
sub abc1 ();
local *abc1 = sub { };
is ($w, '');
sub abc2 ();
local *abc2;
*abc2 = sub { };
is ($w, '');
sub abc3 ();
*abc3 = sub { };
like ($w, qr/Prototype mismatch/);
}
{
# [17375] rcatline to formerly-defined undef was broken. Fixed in
# do_readline by checking SvOK. AMS, 20020918
my $x = "not ";
$x = undef;
$x .= <DATA>;
is ($x, "Rules\n");
}
{
# test the assignment of a GLOB to an LVALUE
my $e = '';
local $SIG{__DIE__} = sub { $e = $_[0] };
my %v;
sub f { $_[0] = 0; $_[0] = "a"; $_[0] = *DATA }
f($v{v});
is ($v{v}, '*main::DATA');
is (ref\$v{v}, 'GLOB', 'lvalue assignment preserves globs');
my $x = readline $v{v};
is ($x, "perl\n");
is ($e, '', '__DIE__ handler never called');
}
{
my $e = '';
# GLOB assignment to tied element
local $SIG{__DIE__} = sub { $e = $_[0] };
sub T::TIEARRAY { bless [] => "T" }
sub T::STORE { $_[0]->[ $_[1] ] = $_[2] }
sub T::FETCH { $_[0]->[ $_[1] ] }
sub T::FETCHSIZE { @{$_[0]} }
tie my @ary => "T";
$ary[0] = *DATA;
is ($ary[0], '*main::DATA');
is (
ref\tied(@ary)->[0], 'GLOB',
'tied elem assignment preserves globs'
);
is ($e, '', '__DIE__ handler not called');
my $x = readline $ary[0];
is($x, "rocks\n");
is ($e, '', '__DIE__ handler never called');
}
{
# Need some sort of die or warn to get the global destruction text if the
# bug is still present
my $output = runperl(prog => <<'EOPROG');
package M;
$| = 1;
sub DESTROY {eval {die qq{Farewell $_[0]}}; print $@}
package main;
bless \$A::B, q{M};
*A:: = \*B::;
EOPROG
like($output, qr/^Farewell M=SCALAR/, "DESTROY was called");
unlike($output, qr/global destruction/,
"unreferenced symbol tables should be cleaned up immediately");
}
# Possibly not the correct test file for these tests.
# There are certain space optimisations implemented via promotion rules to
# GVs
foreach (qw (oonk ga_shloip)) {
ok(!exists $::{$_}, "no symbols of any sort to start with for $_");
}
# A string in place of the typeglob is promoted to the function prototype
$::{oonk} = "pie";
my $proto = eval 'prototype \&oonk';
die if $@;
is ($proto, "pie", "String is promoted to prototype");
# A reference to a value is used to generate a constant subroutine
foreach my $value (3, "Perl rules", \42, qr/whatever/, [1,2,3], {1=>2},
\*STDIN, \&ok, \undef, *STDOUT) {
delete $::{oonk};
$::{oonk} = \$value;
$proto = eval 'prototype \&oonk';
die if $@;
is ($proto, '', "Prototype for a constant subroutine is empty");
my $got = eval 'oonk';
die if $@;
is (ref $got, ref $value, "Correct type of value (" . ref($value) . ")");
is ($got, $value, "Value is correctly set");
}
delete $::{oonk};
$::{oonk} = \"Value";
*{"ga_shloip"} = \&{"oonk"};
is (ref $::{ga_shloip}, 'SCALAR', "Export of proxy constant as is");
is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
is (eval 'ga_shloip', "Value", "Constant has correct value");
is (ref $::{ga_shloip}, 'SCALAR',
"Inlining of constant doesn't change representation");
delete $::{ga_shloip};
eval 'sub ga_shloip (); 1' or die $@;
is ($::{ga_shloip}, '', "Prototype is stored as an empty string");
# Check that a prototype expands.
*{"ga_shloip"} = \&{"oonk"};
is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
is (eval 'ga_shloip', "Value", "Constant has correct value");
is (ref \$::{ga_shloip}, 'GLOB', "Symbol table has full typeglob");
@::zwot = ('Zwot!');
# Check that assignment to an existing typeglob works
{
my $w = '';
local $SIG{__WARN__} = sub { $w = $_[0] };
*{"zwot"} = \&{"oonk"};
is($w, '', "Should be no warning");
}
is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
is (eval 'zwot', "Value", "Constant has correct value");
is (ref \$::{zwot}, 'GLOB', "Symbol table has full typeglob");
is (join ('!', @::zwot), 'Zwot!', "Existing array still in typeglob");
sub spritsits () {
"Traditional";
}
# Check that assignment to an existing subroutine works
{
my $w = '';
local $SIG{__WARN__} = sub { $w = $_[0] };
*{"spritsits"} = \&{"oonk"};
like($w, qr/^Constant subroutine main::spritsits redefined/,
"Redefining a constant sub should warn");
}
is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
is (eval 'spritsits', "Value", "Constant has correct value");
is (ref \$::{spritsits}, 'GLOB', "Symbol table has full typeglob");
# Check that assignment to an existing typeglob works
{
my $w = '';
local $SIG{__WARN__} = sub { $w = $_[0] };
*{"plunk"} = [];
*{"plunk"} = \&{"oonk"};
is($w, '', "Should be no warning");
}
is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
is (eval 'plunk', "Value", "Constant has correct value");
is (ref \$::{plunk}, 'GLOB', "Symbol table has full typeglob");
my $gr = eval '\*plunk' or die;
{
my $w = '';
local $SIG{__WARN__} = sub { $w = $_[0] };
*{$gr} = \&{"oonk"};
is($w, '', "Redefining a constant sub to another constant sub with the same underlying value should not warn (It's just re-exporting, and that was always legal)");
}
is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
is (eval 'plunk', "Value", "Constant has correct value");
is (ref \$::{plunk}, 'GLOB', "Symbol table has full typeglob");
# Non-void context should defeat the optimisation, and will cause the original
# to be promoted (what change 26482 intended)
my $result;
{
my $w = '';
local $SIG{__WARN__} = sub { $w = $_[0] };
$result = *{"awkkkkkk"} = \&{"oonk"};
is($w, '', "Should be no warning");
}
is (ref \$result, 'GLOB',
"Non void assignment should still return a typeglob");
is (ref \$::{oonk}, 'GLOB', "This export does affect original");
is (eval 'plunk', "Value", "Constant has correct value");
is (ref \$::{plunk}, 'GLOB', "Symbol table has full typeglob");
delete $::{oonk};
$::{oonk} = \"Value";
sub non_dangling {
my $w = '';
local $SIG{__WARN__} = sub { $w = $_[0] };
*{"zap"} = \&{"oonk"};
is($w, '', "Should be no warning");
}
non_dangling();
is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
is (eval 'zap', "Value", "Constant has correct value");
is (ref $::{zap}, 'SCALAR', "Exported target is also a PCS");
sub dangling {
local $SIG{__WARN__} = sub { die $_[0] };
*{"biff"} = \&{"oonk"};
}
dangling();
is (ref \$::{oonk}, 'GLOB', "This export does affect original");
is (eval 'biff', "Value", "Constant has correct value");
is (ref \$::{biff}, 'GLOB', "Symbol table has full typeglob");
$::{yarrow} = [4,5,6];
is join("-", eval "yarrow()"), '4-5-6', 'array ref as stash elem';
is ref $::{yarrow}, "ARRAY", 'stash elem is still array ref after use';
is join("-", eval "&yarrow"), '4-5-6', 'calling const list with &';
is join("-", eval "&yarrow(1..10)"), '4-5-6', 'const list ignores & args';
is prototype "yarrow", "", 'const list has "" prototype';
is eval "yarrow", 3, 'const list in scalar cx returns length';
$::{borage} = \&ok;
eval 'borage("sub ref in stash")' or fail "sub ref in stash";
{
use vars qw($glook $smek $foof);
# Check reference assignment isn't affected by the SV type (bug #38439)
$glook = 3;
$smek = 4;
$foof = "halt and cool down";
my $rv = \*smek;
is($glook, 3);
*glook = $rv;
is($glook, 4);
my $pv = "";
$pv = \*smek;
is($foof, "halt and cool down");
*foof = $pv;
is($foof, 4);
}
format =
.
foreach my $value ({1=>2}, *STDOUT{IO}, *STDOUT{FORMAT}) {
# *STDOUT{IO} returns a reference to a PVIO. As it's blessed, ref returns
# IO::Handle, which isn't what we want.
my $type = $value;
$type =~ s/.*=//;
$type =~ s/\(.*//;
delete $::{oonk};
$::{oonk} = $value;
$proto = eval 'prototype \&oonk';
like ($@, qr/^Cannot convert a reference to $type to typeglob/,
"Cannot upgrade ref-to-$type to typeglob");
}
{
no warnings qw(once uninitialized);
my $g = \*clatter;
my $r = eval {no strict; ${*{$g}{SCALAR}}};
is ($@, '', "PERL_DONT_CREATE_GVSV shouldn't affect thingy syntax");
$g = \*vowm;
$r = eval {use strict; ${*{$g}{SCALAR}}};
is ($@, '',
"PERL_DONT_CREATE_GVSV shouldn't affect thingy syntax under strict");
}
{
# Bug reported by broquaint on IRC
*slosh::{HASH}->{ISA}=[];
slosh->import;
pass("gv_fetchmeth coped with the unexpected");
# An audit found these:
{
package slosh;
sub rip {
my $s = shift;
$s->SUPER::rip;
}
}
eval {slosh->rip;};
like ($@, qr/^Can't locate object method "rip"/, "Even with SUPER");
is(slosh->isa('swoosh'), '');
$CORE::GLOBAL::{"lock"}=[];
eval "no warnings; lock";
like($@, qr/^Not enough arguments for lock/,
"Can't trip up general keyword overloading");
$CORE::GLOBAL::{"readline"}=[];
eval "<STDOUT> if 0";
is($@, '', "Can't trip up readline overloading");
$CORE::GLOBAL::{"readpipe"}=[];
eval "`` if 0";
is($@, '', "Can't trip up readpipe overloading");
}
{
die if exists $::{BONK};
$::{BONK} = \"powie";
*{"BONK"} = \&{"BONK"};
eval 'is(BONK(), "powie",
"Assignment works when glob created midway (bug 45607)"); 1'
or die $@;
}
# For now these tests are here, but they would probably be better in a file for
# tests for croaks. (And in turn, that probably deserves to be in a different
# directory. Gerard Goossen has a point about the layout being unclear
sub coerce_integer {
no warnings 'numeric';
$_[0] |= 0;
}
sub coerce_number {
no warnings 'numeric';
$_[0] += 0;
}
sub coerce_string {
$_[0] .= '';
}
foreach my $type (qw(integer number string)) {
my $prog = "coerce_$type(*STDERR)";
is (scalar eval "$prog; 1", undef, "$prog failed...");
like ($@, qr/Can't coerce GLOB to $type in/,
"with the correct error message");
}
# RT #65582 anonymous glob should be defined, and not coredump when
# stringified. The behaviours are:
#
# defined($glob) "$glob" $glob .= ...
# 5.8.8 false "" with uninit warning "" with uninit warning
# 5.10.0 true (coredump) (coredump)
# 5.1[24] true "" "" with uninit warning
# 5.16 true "*__ANON__::..." "*__ANON__::..."
{
my $io_ref = *STDOUT{IO};
my $glob = *$io_ref;
ok(defined $glob, "RT #65582 anon glob should be defined");
my $warn = '';
local $SIG{__WARN__} = sub { $warn = $_[0] };
use warnings;
my $str = "$glob";
is($warn, '', "RT #65582 anon glob stringification shouldn't warn");
is($str, '*__ANON__::__ANONIO__',
"RT #65582/#96326 anon glob stringification");
}
# Another stringification bug: Test that recursion does not cause lexical
# handles to lose their names.
sub r {
my @output;
@output = r($_[0]-1) if $_[0];
open my $fh, "TEST";
push @output, $$fh;
close $fh;
@output;
}
is join(' ', r(4)),
'*main::$fh *main::$fh *main::$fh *main::$fh *main::$fh',
'recursion does not cause lex handles to lose their names';
# And sub cloning, too; not just recursion
my $close_over_me;
is join(' ', sub {
() = $close_over_me;
my @output;
@output = CORE::__SUB__->($_[0]-1) if $_[0];
open my $fh, "TEST";
push @output, $$fh;
close $fh;
@output;
}->(4)),
'*main::$fh *main::$fh *main::$fh *main::$fh *main::$fh',
'sub cloning does not cause lex handles to lose their names';
# [perl #71254] - Assigning a glob to a variable that has a current
# match position. (We are testing that Perl_magic_setmglob respects globs'
# special used of SvSCREAM.)
{
$m = 2; $m=~s/./0/gems; $m= *STDERR;
is(
"$m", "*main::STDERR",
'[perl #71254] assignment of globs to vars with pos'
);
}
# [perl #72740] - indirect object syntax, heuristically imputed due to
# the non-existence of a function, should not cause a stash entry to be
# created for the non-existent function.
{
package RT72740a;
my $f = bless({}, RT72740b);
sub s1 { s2 $f; }
our $s4;
sub s3 { s4 $f; }
}
{
package RT72740b;
sub s2 { "RT72740b::s2" }
sub s4 { "RT72740b::s4" }
}
ok(exists($RT72740a::{s1}), "RT72740a::s1 exists");
ok(!exists($RT72740a::{s2}), "RT72740a::s2 does not exist");
ok(exists($RT72740a::{s3}), "RT72740a::s3 exists");
ok(exists($RT72740a::{s4}), "RT72740a::s4 exists");
is(RT72740a::s1(), "RT72740b::s2", "RT72740::s1 parsed correctly");
is(RT72740a::s3(), "RT72740b::s4", "RT72740::s3 parsed correctly");
# [perl #71686] Globs that are in symbol table can be un-globbed
$sym = undef;
$::{fake} = *sym;
is (eval 'local *::fake = \"chuck"; $fake', 'chuck',
"Localized glob didn't coerce into a RV");
is ($@, '', "Can localize FAKE glob that's present in stash");
is (scalar $::{fake}, "*main::sym",
"Localized FAKE glob's value was correctly restored");
# [perl #1804] *$x assignment when $x is a copy of another glob
# And [perl #77508] (same thing with list assignment)
{
no warnings 'once';
my $x = *_random::glob_that_is_not_used_elsewhere;
*$x = sub{};
is(
"$x", '*_random::glob_that_is_not_used_elsewhere',
'[perl #1804] *$x assignment when $x is FAKE',
);
$x = *_random::glob_that_is_not_used_elsewhere;
(my $dummy, *$x) = (undef,[]);
is(
"$x", '*_random::glob_that_is_not_used_elsewhere',
'[perl #77508] *$x list assignment when $x is FAKE',
) or require Devel::Peek, Devel::Peek::Dump($x);
}
# [perl #76540]
# this caused panics or 'Attempt to free unreferenced scalar'
# (its a compile-time issue, so the die lets us skip the prints)
{
my @warnings;
local $SIG{__WARN__} = sub { push @warnings, @_ };
eval <<'EOF';
BEGIN { $::{FOO} = \'bar' }
die "made it";
print FOO, "\n";
print FOO, "\n";
EOF
like($@, qr/made it/, "#76540 - no panic");
ok(!@warnings, "#76540 - no 'Attempt to free unreferenced scalar'");
}
# [perl #77362] various bugs related to globs as PVLVs
{
no warnings qw 'once void';
my %h; # We pass a key of this hash to the subroutine to get a PVLV.
sub { for(shift) {
# Set up our glob-as-PVLV
$_ = *hon;
# Bad symbol for array
ok eval{ @$_; 1 }, 'PVLV glob slots can be autovivified' or diag $@;
# This should call TIEHANDLE, not TIESCALAR
*thext::TIEHANDLE = sub{};
ok eval{ tie *$_, 'thext'; 1 }, 'PVLV globs can be tied as handles'
or diag $@;
# Assigning undef to the glob should not overwrite it...
{
my $w;
local $SIG{__WARN__} = sub { $w = shift };
*$_ = undef;
is $_, "*main::hon", 'PVLV: assigning undef to the glob does nothing';
like $w, qr\Undefined value assigned to typeglob\,
'PVLV: assigning undef to the glob warns';
}
# Neither should reference assignment.
*$_ = [];
is $_, "*main::hon", "PVLV: arrayref assignment assigns to the AV slot";
# Concatenation should still work.
ok eval { $_ .= 'thlew' }, 'PVLV concatenation does not die' or diag $@;
is $_, '*main::honthlew', 'PVLV concatenation works';
# And we should be able to overwrite it with a string, number, or refer-
# ence, too, if we omit the *.
$_ = *hon; $_ = 'tzor';
is $_, 'tzor', 'PVLV: assigning a string over a glob';
$_ = *hon; $_ = 23;
is $_, 23, 'PVLV: assigning an integer over a glob';
$_ = *hon; $_ = 23.23;
is $_, 23.23, 'PVLV: assigning a float over a glob';
$_ = *hon; $_ = \my $sthat;
is $_, \$sthat, 'PVLV: assigning a reference over a glob';
# This bug was found by code inspection. Could this ever happen in
# real life? :-)
# This duplicates a file handle, accessing it through a PVLV glob, the
# glob having been removed from the symbol table, so a stringified form
# of it does not work. This checks that sv_2io does not stringify a PVLV.
$_ = *quin;
open *quin, "test.pl"; # test.pl is as good a file as any
delete $::{quin};
ok eval { open my $zow, "<&", $_ }, 'PVLV: sv_2io stringifieth not'
or diag $@;
# Similar tests to make sure sv_2cv etc. do not stringify.
*$_ = sub { 1 };
ok eval { &$_ }, "PVLV glob can be called as a sub" or diag $@;
*flelp = sub { 2 };
$_ = 'flelp';
is eval { &$_ }, 2, 'PVLV holding a string can be called as a sub'
or diag $@;
# Coderef-to-glob assignment when the glob is no longer accessible
# under its name: These tests are to make sure the OPpASSIGN_CV_TO_GV
# optimisation takes PVLVs into account, which is why the RHSs have to be
# named subs.
use constant gheen => 'quare';
$_ = *ming;
delete $::{ming};
*$_ = \&gheen;
is eval { &$_ }, 'quare',
'PVLV: constant assignment when the glob is detached from the symtab'
or diag $@;
$_ = *bength;
delete $::{bength};
*gheck = sub { 'lon' };
*$_ = \&gheck;
is eval { &$_ }, 'lon',
'PVLV: coderef assignment when the glob is detached from the symtab'
or diag $@;
SKIP: {
skip_if_miniperl("no dynamic loading on miniperl, so can't load PerlIO::scalar", 1);
# open should accept a PVLV as its first argument
$_ = *hon;
ok eval { open $_,'<', \my $thlext }, 'PVLV can be the first arg to open'
or diag $@;
}
# -t should not stringify
$_ = *thlit; delete $::{thlit};
*$_ = *STDOUT{IO};
ok defined -t $_, 'PVLV: -t does not stringify';
# neither should -T
# but some systems don’t support this on file handles
my $pass;
ok
eval {
open my $quile, "<", 'test.pl';
$_ = *$quile;
$pass = -T $_;
1
} ? $pass : $@ =~ /not implemented on filehandles/,
"PVLV: -T does not stringify";
# Unopened file handle
{
my $w;
local $SIG{__WARN__} = sub { $w .= shift };
$_ = *vor;
close $_;
like $w, qr\unopened filehandle vor\,
'PVLV globs get their names reported in unopened error messages';
}
}}->($h{k});
}
*aieee = 4;
pass('Can assign integers to typeglobs');
*aieee = 3.14;
pass('Can assign floats to typeglobs');
*aieee = 'pi';
pass('Can assign strings to typeglobs');
{
package thrext;
sub TIESCALAR{bless[]}
sub STORE{ die "No!"}
sub FETCH{ no warnings 'once'; *thrit }
tie my $a, "thrext";
() = "$a"; # do a fetch; now $a holds a glob
eval { *$a = sub{} };
untie $a;
eval { $a = "bar" };
::is $a, "bar",
"[perl #77812] Globs in tied scalars can be reified if STORE dies"
}
# These two crashed prior to 5.13.6. In 5.13.6 they were fatal errors. They
# were fixed in 5.13.7.
ok eval {
my $glob = \*heen::ISA;
delete $::{"heen::"};
*$glob = *bar;
}, "glob-to-*ISA assignment works when *ISA has lost its stash";
ok eval {
my $glob = \*slare::ISA;
delete $::{"slare::"};
*$glob = [];
}, "array-to-*ISA assignment works when *ISA has lost its stash";
# These two crashed in 5.13.6. They were likewise fixed in 5.13.7.
ok eval {
sub greck;
my $glob = do { no warnings "once"; \*phing::foo};
delete $::{"phing::"};
*$glob = *greck;
}, "Assigning a glob-with-sub to a glob that has lost its stash works";
ok eval {
sub pon::foo;
my $glob = \*pon::foo;
delete $::{"pon::"};
*$glob = *foo;
}, "Assigning a glob to a glob-with-sub that has lost its stash works";
{
package Tie::Alias;
sub TIESCALAR{ bless \\pop }
sub FETCH { $${$_[0]} }
sub STORE { $${$_[0]} = $_[1] }
package main;
tie my $alias, 'Tie::Alias', my $var;
no warnings 'once';
$var = *galobbe;
{
local *$alias = [];
$var = 3;
is $alias, 3, "[perl #77926] Glob reification during localisation";
}
}
# This code causes gp_free to call a destructor when a glob is being
# restored on scope exit. The destructor used to see SVs with a refcount of
# zero inside the glob, which could result in crashes (though not in this
# test case, which just panics).
{
no warnings 'once';
my $survived;
*Trit::DESTROY = sub {
$thwext = 42; # panic
$survived = 1;
};
{
local *thwext;
$thwext = bless[],'Trit';
();
}
ok $survived,
'no error when gp_free calls a destructor that assigns to the gv';
}
# This is a similar test, for destructors seeing a GV without a reference
# count on its gp.
sub undefine_me_if_you_dare {}
bless \&undefine_me_if_you_dare, "Undefiner";
sub Undefiner::DESTROY {
undef *undefine_me_if_you_dare;
}
{
my $w;
local $SIG{__WARN__} = sub { $w .= shift };
undef *undefine_me_if_you_dare;
is $w, undef,
'undeffing a gv in DESTROY triggered by undeffing the same gv'
}
# [perl #121242]
# More gp_free madness. gp_free could call a destructor that frees the gv
# whose gp is being freed.
sub Fred::AUTOLOAD { $Fred::AUTOLOAD }
undef *{"Fred::AUTOLOAD"};
pass 'no crash from gp_free triggering gv_try_downgrade';
sub _121242::DESTROY { delete $_121242::{$_[0][0]} };
${"_121242::foo"} = bless ["foo"], _121242::;
undef *{"_121242::foo"};
pass 'no crash from pp_undef/gp_free freeing the gv';
${"_121242::bar"} = bless ["bar"], _121242::;
*{"_121242::bar"} = "bar";
pass 'no crash from sv_setsv/gp_free freeing the gv';
${"_121242::baz"} = bless ["baz"], _121242::;
*{"_121242::baz"} = *foo;
pass 'no crash from glob_assign_glob/gp_free freeing the gv';
{
my $foo;
undef *_121242::DESTROY;
*_121242::DESTROY = sub { undef $foo };
my $set_up_foo = sub {
# Make $$foo into a fake glob whose array slot holds a blessed
# array that undefines $foo, freeing the fake glob.
$foo = undef;
$$foo = do {local *bar};
*$$foo = bless [], _121242::;
};
&$set_up_foo;
$$foo = 3;
pass 'no crash from sv_setsv/sv_unglob/gp_free freeing the gv';
&$set_up_foo;
utf8::encode $$foo;
pass 'no crash from sv_utf8_encode/sv_unglob/gp_free freeing the gv';
&$set_up_foo;
open BAR, "TEST";
$$foo .= <BAR>;
pass 'no crash from do_readline/sv_unglob/gp_free freeing the gv';
close BAR;
&$set_up_foo;
$$foo .= 3;
pass 'no crash from pp_concat/sv_unglob/gp_free freeing the gv';
&$set_up_foo;
no warnings;
$$foo++;
pass 'no crash from sv_inc/sv_unglob/gp_free freeing the gv';
&$set_up_foo;
$$foo--;
pass 'no crash from sv_dec/sv_unglob/gp_free freeing the gv';
&$set_up_foo;
undef $$foo;
pass 'no crash from pp_undef/sv_unglob/gp_free freeing the gv';
$foo = undef;
$$foo = 3;
$$foo =~ s/3/$$foo = do {local *bar}; *$$foo = bless [],_121242::; 4/e;
pass 'no crash from pp_substcont/sv_unglob/gp_free freeing the gv';
}
# *{undef}
eval { *{my $undef} = 3 };
like $@, qr/^Can't use an undefined value as a symbol reference at /,
'*{ $undef } assignment';
eval { *{;undef} = 3 };
like $@, qr/^Can't use an undefined value as a symbol reference at /,
'*{ ;undef } assignment';
# [perl #99142] defined &{"foo"} when there is a constant stub
# If I break your module, you get to have it mentioned in Perl's tests. :-)
package HTTP::MobileAttribute::Plugin::Locator {
use constant LOCATOR_GPS => 1;
::ok defined &{__PACKAGE__."::LOCATOR_GPS"},
'defined &{"name of constant"}';
::ok Internals::SvREFCNT(${__PACKAGE__."::"}{LOCATOR_GPS}),
"stash elem for slot is not freed prematurely";
}
# Check that constants promoted to CVs point to the right GVs when the name
# contains a null.
package lrcg {
use constant x => 3;
# These two lines abuse the optimisation that copies the scalar ref from
# one stash element to another, to get a constant with a null in its name
*{"yz\0a"} = \&{"x"};
my $ref = \&{"yz\0a"};
::ok !exists $lrcg::{yz},
'constants w/nulls in their names point 2 the right GVs when promoted';
}
{
no warnings 'io';
stat *{"try_downgrade"};
-T _;
$bang = $!;
eval "*try_downgrade if 0";
-T _;
is "$!",$bang,
'try_downgrade does not touch PL_statgv (last stat handle)';
readline *{"try_downgrade2"};
my $lastfh = "${^LAST_FH}";
eval "*try_downgrade2 if 0";
is ${^LAST_FH}, $lastfh, 'try_downgrade does not touch PL_last_in_gv';
}
is runperl(prog => '$s = STDERR; close $s; undef *$s;'
.'eval q-*STDERR if 0-; *$s = *STDOUT{IO}; warn'),
"Warning: something's wrong at -e line 1.\n",
"try_downgrade does not touch PL_stderrgv";
is runperl(prog =>
'use constant foo=>1; BEGIN { $x = \&foo } undef &$x; $x->()',
stderr=>1),
"Undefined subroutine &main::foo called at -e line 1.\n",
"gv_try_downgrade does not anonymise CVs referenced elsewhere";
package glob_constant_test {
sub foo { 42 }
use constant bar => *foo;
BEGIN { undef *foo }
::is eval { bar->() }, eval { &{+bar} },
'glob_constant->() is not mangled at compile time';
::is "$@", "", 'no error from eval { &{+glob_constant} }';
}
{
my $free2;
local $SIG{__WARN__} = sub { ++$free2 if shift =~ /Attempt to free/ };
my $handleref;
my $proxy = \$handleref;
open $$proxy, "TEST";
delete $::{*$handleref{NAME}}; # delete *main::_GEN_xxx
undef $handleref;
is $free2, undef,
'no double free because of bad rv2gv/newGVgen refcounting';
}
# Look away, please.
# This violates perl's internal structures by fiddling with stashes in a
# way that should never happen, but perl should not start trying to free
# unallocated memory as a result. There is no ok() or is() because the
# panic that used to occur only occurred during global destruction, and
# only with PERL_DESTRUCT_LEVEL=2. (The panic itself was sufficient for
# the harness to consider this test script to have failed.)
$::{aoeuaoeuaoeaoeu} = __PACKAGE__; # cow
() = *{"aoeuaoeuaoeaoeu"};
$x = *_119051;
$y = \&$x;
undef $x;
eval { &$y };
pass "No crash due to CvGV(vivified stub) pointing to flattened glob copy";
# Not really supported, but this should not crash either:
$x = *_119051again;
delete $::{_119051again};
$::{_119051again} = $x; # now we have a fake glob under the right name
$y = \&$x; # so when this tries to look up the right GV for
undef $::{_119051again}; # CvGV, it still gets a fake one
eval { $y->() };
pass "No crash due to CvGV pointing to glob copy in the stash";
# Aliasing should disable no-common-vars optimisation.
{
*x = *y;
$x = 3;
($x, my $z) = (1, $y);
is $z, 3, 'list assignment after aliasing [perl #89646]';
}
__END__
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