#!./perl
# Tests for caller()
BEGIN {
chdir 't' if -d 't';
require './test.pl';
set_up_inc('../lib');
plan( tests => 100 ); # some tests are run in a BEGIN block
}
my @c;
BEGIN { print "# Tests with caller(0)\n"; }
@c = caller(0);
ok( (!@c), "caller(0) in main program" );
eval { @c = caller(0) };
is( $c[3], "(eval)", "subroutine name in an eval {}" );
ok( !$c[4], "hasargs false in an eval {}" );
eval q{ @c = caller(0) };
is( $c[3], "(eval)", "subroutine name in an eval ''" );
ok( !$c[4], "hasargs false in an eval ''" );
sub { @c = caller(0) } -> ();
is( $c[3], "main::__ANON__", "anonymous subroutine name" );
ok( $c[4], "hasargs true with anon sub" );
# Bug 20020517.003 (#9367), used to dump core
sub foo { @c = caller(0) }
my $fooref = delete $::{foo};
$fooref -> ();
is( $c[3], "main::foo", "deleted subroutine name" );
ok( $c[4], "hasargs true with deleted sub" );
BEGIN {
require strict;
is +(caller 0)[1], __FILE__,
"[perl #68712] filenames after require in a BEGIN block"
}
print "# Tests with caller(1)\n";
sub f { @c = caller(1) }
sub callf { f(); }
callf();
is( $c[3], "main::callf", "subroutine name" );
ok( $c[4], "hasargs true with callf()" );
&callf;
ok( !$c[4], "hasargs false with &callf" );
eval { f() };
is( $c[3], "(eval)", "subroutine name in an eval {}" );
ok( !$c[4], "hasargs false in an eval {}" );
eval q{ f() };
is( $c[3], "(eval)", "subroutine name in an eval ''" );
ok( !$c[4], "hasargs false in an eval ''" );
sub { f() } -> ();
is( $c[3], "main::__ANON__", "anonymous subroutine name" );
ok( $c[4], "hasargs true with anon sub" );
sub foo2 { f() }
my $fooref2 = delete $::{foo2};
$fooref2 -> ();
is( $c[3], "main::foo2", "deleted subroutine name" );
ok( $c[4], "hasargs true with deleted sub" );
# See if caller() returns the correct warning mask
sub show_bits
{
my $in = shift;
my $out = '';
foreach (unpack('W*', $in)) {
$out .= sprintf('\x%02x', $_);
}
return $out;
}
sub check_bits
{
local $Level = $Level + 2;
my ($got, $exp, $desc) = @_;
if (! ok($got eq $exp, $desc)) {
diag(' got: ' . show_bits($got));
diag('expected: ' . show_bits($exp));
}
}
sub testwarn {
my $w = shift;
my $id = shift;
check_bits( (caller(0))[9], $w, "warnings match caller ($id)");
}
{
no warnings;
# Build the warnings mask dynamically
my ($default, $registered);
BEGIN {
for my $i (0..$warnings::LAST_BIT/2 - 1) {
vec($default, $i, 2) = 1;
}
$registered = $default;
vec($registered, $warnings::LAST_BIT/2, 2) = 1;
}
BEGIN { check_bits( ${^WARNING_BITS}, "\0" x $warnings::BYTES, 'all bits off via "no warnings"' ) }
testwarn("\0" x $warnings::BYTES, 'no bits');
use warnings;
BEGIN { check_bits( ${^WARNING_BITS}, $default,
'default bits on via "use warnings"' ); }
BEGIN { testwarn($default, 'all'); }
# run-time :
# the warning mask has been extended by warnings::register
testwarn($registered, 'ahead of w::r');
use warnings::register;
BEGIN { check_bits( ${^WARNING_BITS}, $registered,
'warning bits on via "use warnings::register"' ) }
testwarn($registered, 'following w::r');
}
# The next two cases test for a bug where caller ignored evals if
# the DB::sub glob existed but &DB::sub did not (for example, if
# $^P had been set but no debugger has been loaded). The tests
# thus assume that there is no &DB::sub: if there is one, they
# should both pass no matter whether or not this bug has been
# fixed.
my $debugger_test = q<
my @stackinfo = caller(0);
return scalar @stackinfo;
>;
sub pb { return (caller(0))[3] }
my $i = eval $debugger_test;
is( $i, 11, "do not skip over eval (and caller returns 10 elements)" );
is( eval 'pb()', 'main::pb', "actually return the right function name" );
my $saved_perldb = $^P;
$^P = 16;
$^P = $saved_perldb;
$i = eval $debugger_test;
is( $i, 11, 'do not skip over eval even if $^P had been on at some point' );
is( eval 'pb()', 'main::pb', 'actually return the right function name even if $^P had been on at some point' );
print "# caller can now return the compile time state of %^H\n";
sub hint_exists {
my $key = shift;
my $level = shift;
my @results = caller($level||0);
exists $results[10]->{$key};
}
sub hint_fetch {
my $key = shift;
my $level = shift;
my @results = caller($level||0);
$results[10]->{$key};
}
{
my $tmpfile = tempfile();
open my $fh, '>', $tmpfile or die "open $tmpfile: $!";
print $fh <<'EOP';
#!perl -wl
use strict;
{
package KAZASH ;
sub DESTROY {
print "DESTROY";
}
}
@DB::args = bless [], 'KAZASH';
print $^P;
print scalar @DB::args;
{
local $^P = shift;
}
@DB::args = (); # At this point, the object should be freed.
print $^P;
print scalar @DB::args;
# It shouldn't leak.
EOP
close $fh;
foreach (0, 1) {
my $got = runperl(progfile => $tmpfile, args => [$_]);
$got =~ s/\s+/ /gs;
like($got, qr/\s*0 1 DESTROY 0 0\s*/,
"\@DB::args doesn't leak with \$^P = $_");
}
}
# This also used to leak [perl #97010]:
{
my $gone;
sub fwib::DESTROY { ++$gone }
package DB;
sub { () = caller(0) }->(); # initialise PL_dbargs
@args = bless[],'fwib';
sub { () = caller(0) }->(); # clobber @args without initialisation
::is $gone, 1, 'caller does not leak @DB::args elems when AvREAL';
}
# And this crashed [perl #93320]:
sub {
package DB;
()=caller(0);
undef *DB::args;
()=caller(0);
}->();
pass 'No crash when @DB::args is freed between caller calls';
# This also crashed:
package glelp;
sub TIEARRAY { bless [] }
sub EXTEND { }
sub CLEAR { }
sub FETCH { $_[0][$_[1]] }
sub STORE { $_[0][$_[1]] = $_[2] }
package DB;
tie @args, 'glelp';
eval { sub { () = caller 0; } ->(1..3) };
::like $@, qr "^Cannot set tied \@DB::args at ",
'caller dies with tie @DB::args';
::ok tied @args, '@DB::args is still tied';
untie @args;
package main;
# [perl #113486]
fresh_perl_is <<'END', "ok\n", {},
{ package foo; sub bar { main::bar() } }
sub bar {
delete $::{"foo::"};
my $x = \($1+2);
my $y = \($1+2); # this is the one that reuses the mem addr, but
my $z = \($1+2); # try the others just in case
s/2// for $$x, $$y, $$z; # now SvOOK
$x = caller;
print "ok\n";
};
foo::bar
END
"No crash when freed stash is reused for PV with offset hack";
is eval "(caller 0)[6]", "(caller 0)[6]",
'eval text returned by caller does not include \n;';
if (1) {
is (sub { (caller)[2] }->(), __LINE__,
'[perl #115768] caller gets line numbers from nulled cops');
}
# Test it at the end of the program, too.
fresh_perl_is(<<'115768', 2, {},
if (1) {
foo();
}
sub foo { print +(caller)[2] }
115768
'[perl #115768] caller gets line numbers from nulled cops (2)');
# PL_linestr should not be modifiable
eval '"${;BEGIN{ ${\(caller 2)[6]} = *foo }}"';
pass "no assertion failure after modifying eval text via caller";
is eval "<<END;\nfoo\nEND\n(caller 0)[6]",
"<<END;\nfoo\nEND\n(caller 0)[6]",
'here-docs do not gut eval text';
is eval "s//<<END/e;\nfoo\nEND\n(caller 0)[6]",
"s//<<END/e;\nfoo\nEND\n(caller 0)[6]",
'here-docs in quote-like ops do not gut eval text';
# The bitmask should be assignable to ${^WARNING_BITS} without resulting in
# different warnings settings.
{
my $ bits = sub { (caller 0)[9] }->();
my $w;
local $SIG{__WARN__} = sub { $w++ };
eval '
use warnings;
BEGIN { ${^WARNING_BITS} = $bits }
local $^W = 1;
() = 1 + undef;
$^W = 0;
() = 1 + undef;
';
is $w, 1, 'value from (caller 0)[9] (bitmask) works in ${^WARNING_BITS}';
}
# [perl #126991]
sub getlineno { (caller)[2] }
my $line = eval "\n#line 3000000000\ngetlineno();";
is $line, "3000000000", "check large line numbers are preserved";
# This was fixed with commit d4d03940c58a0177, which fixed bug #78742
fresh_perl_is <<'END', "__ANON__::doof\n", {},
package foo;
BEGIN {undef %foo::}
sub doof { caller(0) }
print +(doof())[3];
END
"caller should not SEGV when the current package is undefined";
# caller should not SEGV when the eval entry has been cleared #120998
fresh_perl_is <<'END', 'main', {},
$SIG{__DIE__} = \&dbdie;
eval '/x';
sub dbdie {
@x = caller(1);
print $x[0];
}
END
"caller should not SEGV for eval '' stack frames";
TODO: {
local $::TODO = 'RT #7165: line number should be consistent for multiline subroutine calls';
fresh_perl_is(<<'EOP', "6\n9\n", {}, 'RT #7165: line number should be consistent for multiline subroutine calls');
sub tagCall {
my ($package, $file, $line) = caller;
print "$line\n";
}
tagCall
"abc";
tagCall
sub {};
EOP
}
$::testing_caller = 1;
do './op/caller.pl' or die $@;
{
package RT129239;
BEGIN {
my ($pkg, $file, $line) = caller;
::is $file, 'virtually/op/caller.t', "BEGIN block sees correct caller filename";
::is $line, 12345, "BEGIN block sees correct caller line";
TODO: {
local $::TODO = "BEGIN blocks have wrong caller package [perl #129239]";
::is $pkg, 'RT129239', "BEGIN block sees correct caller package";
}
#line 12345 "virtually/op/caller.t"
}
}