Profile of XSLoader.pm

Filename	/usr/share/perl/5.20/XSLoader.pm
Statements	Executed 0 statements in 0s

Line	Calls	Time in subs	Code
1			# Generated from XSLoader.pm.PL (resolved %Config::Config value)
2
3			package XSLoader;
4
5			$VERSION = "0.17";
6
7			#use strict;
8
9			package DynaLoader;
10
11			# No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.
12			# NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB
13			boot_DynaLoader('DynaLoader') if defined(&boot_DynaLoader) &&
14			!defined(&dl_error);
15			package XSLoader;
16
17			sub load {
18			package DynaLoader;
19
20			my ($module, $modlibname) = caller();
21
22			if (@_) {
23			$module = $_[0];
24			} else {
25			$_[0] = $module;
26			}
27
28			# work with static linking too
29			my $boots = "$module\::bootstrap";
30			goto &$boots if defined &$boots;
31
32			goto \&XSLoader::bootstrap_inherit unless $module and defined &dl_load_file;
33
34			my @modparts = split(/::/,$module);
35			my $modfname = $modparts[-1];
36
37			my $modpname = join('/',@modparts);
38			my $c = @modparts;
39			$modlibname =~ s,[\\/][^\\/]+$,, while $c--; # Q&D basename
40			my $file = "$modlibname/auto/$modpname/$modfname.so";
41
42			# print STDERR "XSLoader::load for $module ($file)\n" if $dl_debug;
43
44			my $bs = $file;
45			$bs =~ s/(\.\w+)?(;\d*)?$/\.bs/; # look for .bs 'beside' the library
46
47			if (-s $bs) { # only read file if it's not empty
48			# print STDERR "BS: $bs ($^O, $dlsrc)\n" if $dl_debug;
49			eval { do $bs; };
50			warn "$bs: $@\n" if $@;
51			}
52
53			goto \&XSLoader::bootstrap_inherit if not -f $file or -s $bs;
54
55			my $bootname = "boot_$module";
56			$bootname =~ s/\W/_/g;
57			@DynaLoader::dl_require_symbols = ($bootname);
58
59			my $boot_symbol_ref;
60
61			# Many dynamic extension loading problems will appear to come from
62			# this section of code: XYZ failed at line 123 of DynaLoader.pm.
63			# Often these errors are actually occurring in the initialisation
64			# C code of the extension XS file. Perl reports the error as being
65			# in this perl code simply because this was the last perl code
66			# it executed.
67
68			my $libref = dl_load_file($file, 0) or do {
69			require Carp;
70			Carp::croak("Can't load '$file' for module $module: " . dl_error());
71			};
72			push(@DynaLoader::dl_librefs,$libref); # record loaded object
73
74			my @unresolved = dl_undef_symbols();
75			if (@unresolved) {
76			require Carp;
77			Carp::carp("Undefined symbols present after loading $file: @unresolved\n");
78			}
79
80			$boot_symbol_ref = dl_find_symbol($libref, $bootname) or do {
81			require Carp;
82			Carp::croak("Can't find '$bootname' symbol in $file\n");
83			};
84
85			push(@DynaLoader::dl_modules, $module); # record loaded module
86
87			boot:
88			my $xs = dl_install_xsub($boots, $boot_symbol_ref, $file);
89
90			# See comment block above
91			push(@DynaLoader::dl_shared_objects, $file); # record files loaded
92	2	51µs	return &$xs(@_); # spent 44µs making 1 call to attributes::import # spent 6µs making 1 call to Encode::PERLQQ
93			}
94
95			sub bootstrap_inherit {
96			require DynaLoader;
97			goto \&DynaLoader::bootstrap_inherit;
98			}
99
100			1;
101
102			__END__
103