/usr/share/perl/5.26.1/XSLoader.pm is in perl-modules-5.26 5.26.1-6ubuntu0.3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | # Generated from XSLoader_pm.PL (resolved %Config::Config value)
# This file is unique for every OS
package XSLoader;
$VERSION = "0.27";
#use strict;
package DynaLoader;
# No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.
# NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB
boot_DynaLoader('DynaLoader') if defined(&boot_DynaLoader) &&
!defined(&dl_error);
package XSLoader;
sub load {
package DynaLoader;
my ($caller, $modlibname) = caller();
my $module = $caller;
if (@_) {
$module = $_[0];
} else {
$_[0] = $module;
}
# work with static linking too
my $boots = "$module\::bootstrap";
goto &$boots if defined &$boots;
goto \&XSLoader::bootstrap_inherit unless $module and defined &dl_load_file;
my @modparts = split(/::/,$module);
my $modfname = $modparts[-1];
my $modpname = join('/',@modparts);
my $c = () = split(/::/,$caller,-1);
$modlibname =~ s,[\\/][^\\/]+$,, while $c--; # Q&D basename
# Does this look like a relative path?
if ($modlibname !~ m{^/}) {
# Someone may have a #line directive that changes the file name, or
# may be calling XSLoader::load from inside a string eval. We cer-
# tainly do not want to go loading some code that is not in @INC,
# as it could be untrusted.
#
# We could just fall back to DynaLoader here, but then the rest of
# this function would go untested in the perl core, since all @INC
# paths are relative during testing. That would be a time bomb
# waiting to happen, since bugs could be introduced into the code.
#
# So look through @INC to see if $modlibname is in it. A rela-
# tive $modlibname is not a common occurrence, so this block is
# not hot code.
FOUND: {
for (@INC) {
if ($_ eq $modlibname) {
last FOUND;
}
}
# Not found. Fall back to DynaLoader.
goto \&XSLoader::bootstrap_inherit;
}
}
my $file = "$modlibname/auto/$modpname/$modfname.so";
# print STDERR "XSLoader::load for $module ($file)\n" if $dl_debug;
my $bs = $file;
$bs =~ s/(\.\w+)?(;\d*)?$/\.bs/; # look for .bs 'beside' the library
if (-s $bs) { # only read file if it's not empty
# print STDERR "BS: $bs ($^O, $dlsrc)\n" if $dl_debug;
eval { local @INC = ('.'); do $bs; };
warn "$bs: $@\n" if $@;
goto \&XSLoader::bootstrap_inherit;
}
goto \&XSLoader::bootstrap_inherit if not -f $file;
my $bootname = "boot_$module";
$bootname =~ s/\W/_/g;
@DynaLoader::dl_require_symbols = ($bootname);
my $boot_symbol_ref;
# Many dynamic extension loading problems will appear to come from
# this section of code: XYZ failed at line 123 of DynaLoader.pm.
# Often these errors are actually occurring in the initialisation
# C code of the extension XS file. Perl reports the error as being
# in this perl code simply because this was the last perl code
# it executed.
my $libref = dl_load_file($file, 0) or do {
require Carp;
Carp::croak("Can't load '$file' for module $module: " . dl_error());
};
push(@DynaLoader::dl_librefs,$libref); # record loaded object
$boot_symbol_ref = dl_find_symbol($libref, $bootname) or do {
require Carp;
Carp::croak("Can't find '$bootname' symbol in $file\n");
};
push(@DynaLoader::dl_modules, $module); # record loaded module
boot:
my $xs = dl_install_xsub($boots, $boot_symbol_ref, $file);
# See comment block above
push(@DynaLoader::dl_shared_objects, $file); # record files loaded
return &$xs(@_);
}
sub bootstrap_inherit {
require DynaLoader;
goto \&DynaLoader::bootstrap_inherit;
}
1;
__END__
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