Profile of XSLoader.pm

Filename	/usr/share/perl/5.28/XSLoader.pm
Statements	Executed 0 statements in 0s

Subroutines
Calls	P	F	Exclusive Time	Inclusive Time	Subroutine
12	12	12	2.54ms	2.54ms	XSLoader::::loadXSLoader::load
0	0	0	0s	0s	XSLoader::::bootstrap_inheritXSLoader::bootstrap_inherit

Call graph for these subroutines as a Graphviz dot language file.

Line	State ments	Time on line	Calls	Time in subs	Code
1					# Generated from XSLoader_pm.PL (resolved %Config::Config value)
2					# This file is unique for every OS
3
4					package XSLoader;
5
6					$VERSION = "0.30"; # remember to update version in POD!
7
8					#use strict;
9
10					package DynaLoader;
11
12					# No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.
13					# NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB
14					boot_DynaLoader('DynaLoader') if defined(&boot_DynaLoader) &&
15					!defined(&dl_error);
16					package XSLoader;
17
18					# spent 2.54ms within XSLoader::load which was called 12 times, avg 212µs/call: # once (308µs+0s) by File::Copy::BEGIN@1 at line 94 of Time/HiRes.pm # once (258µs+0s) by RBM::BEGIN@21 at line 244 of Digest/SHA.pm # once (239µs+0s) by YAML::XS::BEGIN@20 at line 7 of YAML/XS/LibYAML.pm # once (238µs+0s) by Unicode::UTF8::BEGIN@6 at line 14 of Unicode/UTF8.pm # once (221µs+0s) by Storable::BEGIN@72 at line 11 of Fcntl.pm # once (212µs+0s) by IO::Handle::BEGIN@8 at line 11 of IO.pm # once (206µs+0s) by Encode::BEGIN@9 at line 12 of Encode.pm # once (197µs+0s) by File::Spec::Unix::BEGIN@4 at line 80 of Cwd.pm # once (172µs+0s) by Encode::BEGIN@55 at line 98 of Storable.pm # once (169µs+0s) by RBM::BEGIN@53 at line 68 of File/Glob.pm # once (168µs+0s) by YAML::XS::BEGIN@21 at line 23 of List/Util.pm # once (154µs+0s) by RBM::BEGIN@22 at line 24 of Digest/MD5.pm sub load {
19					package DynaLoader;
20
21					my ($caller, $modlibname) = caller();
22					my $module = $caller;
23
24					if (@_) {
25					$module = $_[0];
26					} else {
27					$_[0] = $module;
28					}
29
30					# work with static linking too
31					my $boots = "$module\::bootstrap";
32					goto &$boots if defined &$boots;
33
34					goto \&XSLoader::bootstrap_inherit unless $module and defined &dl_load_file;
35
36					my @modparts = split(/::/,$module);
37					my $modfname = $modparts[-1];
38					my $modfname_orig = $modfname; # For .bs file search
39
40					my $modpname = join('/',@modparts);
41					my $c = () = split(/::/,$caller,-1);
42					$modlibname =~ s,[\\/][^\\/]+$,, while $c--; # Q&D basename
43					# Does this look like a relative path?
44					if ($modlibname !~ m{^/}) {
45					# Someone may have a #line directive that changes the file name, or
46					# may be calling XSLoader::load from inside a string eval. We cer-
47					# tainly do not want to go loading some code that is not in @INC,
48					# as it could be untrusted.
49					#
50					# We could just fall back to DynaLoader here, but then the rest of
51					# this function would go untested in the perl core, since all @INC
52					# paths are relative during testing. That would be a time bomb
53					# waiting to happen, since bugs could be introduced into the code.
54					#
55					# So look through @INC to see if $modlibname is in it. A rela-
56					# tive $modlibname is not a common occurrence, so this block is
57					# not hot code.
58					FOUND: {
59					for (@INC) {
60					if ($_ eq $modlibname) {
61					last FOUND;
62					}
63					}
64					# Not found. Fall back to DynaLoader.
65					goto \&XSLoader::bootstrap_inherit;
66					}
67					}
68					my $file = "$modlibname/auto/$modpname/$modfname.so";
69
70					# print STDERR "XSLoader::load for $module ($file)\n" if $dl_debug;
71
72					# N.B. The .bs file does not following the naming convention used
73					# by mod2fname, so use the unedited version of the name.
74
75					my $bs = "$modlibname/auto/$modpname/$modfname_orig.bs";
76
77					# This calls DynaLoader::bootstrap, which will load the .bs file if present
78					goto \&XSLoader::bootstrap_inherit if not -f $file or -s $bs;
79
80					my $bootname = "boot_$module";
81					$bootname =~ s/\W/_/g;
82					@DynaLoader::dl_require_symbols = ($bootname);
83
84					my $boot_symbol_ref;
85
86					# Many dynamic extension loading problems will appear to come from
87					# this section of code: XYZ failed at line 123 of DynaLoader.pm.
88					# Often these errors are actually occurring in the initialisation
89					# C code of the extension XS file. Perl reports the error as being
90					# in this perl code simply because this was the last perl code
91					# it executed.
92
93					my $libref = dl_load_file($file, 0) or do {
94					require Carp;
95					Carp::croak("Can't load '$file' for module $module: " . dl_error());
96					};
97					push(@DynaLoader::dl_librefs,$libref); # record loaded object
98
99					$boot_symbol_ref = dl_find_symbol($libref, $bootname) or do {
100					require Carp;
101					Carp::croak("Can't find '$bootname' symbol in $file\n");
102					};
103
104					push(@DynaLoader::dl_modules, $module); # record loaded module
105
106					boot:
107					my $xs = dl_install_xsub($boots, $boot_symbol_ref, $file);
108
109					# See comment block above
110					push(@DynaLoader::dl_shared_objects, $file); # record files loaded
111					return &$xs(@_);
112					}
113
114					sub bootstrap_inherit {
115					require DynaLoader;
116					goto \&DynaLoader::bootstrap_inherit;
117					}
118
119					1;
120
121					__END__
122