Current File : //usr/lib/x86_64-linux-gnu/perl-base/XSLoader.pm
# Generated from XSLoader_pm.PL (resolved %Config::Config value)
# This file is unique for every OS
use strict;
no strict 'refs';
package XSLoader;
our $VERSION = "0.32"; # remember to update version in POD!
package DynaLoader;
# No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.
# NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB
boot_DynaLoader('DynaLoader') if defined(&boot_DynaLoader) &&
!defined(&dl_error);
package XSLoader;
sub load {
package DynaLoader;
my ($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 $modfname_orig = $modfname; # For .bs file search
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;
# N.B. The .bs file does not following the naming convention used
# by mod2fname, so use the unedited version of the name.
my $bs = "$modlibname/auto/$modpname/$modfname_orig.bs";
# This calls DynaLoader::bootstrap, which will load the .bs file if present
goto \&XSLoader::bootstrap_inherit if not -f $file or -s $bs;
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(@_);
}
# Can't test with DynaLoader->can('bootstrap_inherit') when building in the
# core, as XSLoader gets built before DynaLoader.
sub bootstrap_inherit {
require DynaLoader;
goto \&DynaLoader::bootstrap_inherit;
}
1;
__END__
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