Profile of /usr/local/lib/perl5/5.10.1/darwin-2level/XSLoader.pm

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For 05.Domain_and_Item.t
Run on Tue May 4 17:21:41 2010
Reported on Tue May 4 17:22:21 2010

File | /usr/local/lib/perl5/5.10.1/darwin-2level/XSLoader.pm
Statements Executed | 3
Statement Execution Time | 127µs

Subroutines — ordered by exclusive time
Calls | P | F | Exclusive Time | Inclusive Time | Subroutine
--- | --- | --- | --- | --- | ---
21 | 21 | 21 | 5.92ms | 6.51ms | 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 |  |  |  |  |
3 |  |  |  |  | package XSLoader;
4 |  |  |  |  |
5 |  |  |  |  | $VERSION = "0.10";
6 |  |  |  |  |
7 |  |  |  |  | #use strict;
8 |  |  |  |  |
9 |  |  |  |  | # enable debug/trace messages from DynaLoader perl code
10 |  |  |  |  | # $dl_debug = $ENV{PERL_DL_DEBUG} || 0 unless defined $dl_debug;
11 |  |  |  |  |
12 |  |  |  |  | my $dl_dlext = 'bundle';
13 |  |  |  |  |
14 |  |  |  |  | package DynaLoader;
15 |  |  |  |  |
16 |  |  |  |  | # No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.
17 |  |  |  |  | # NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB
18 |  |  |  |  | boot_DynaLoader('DynaLoader') if defined(&boot_DynaLoader) &&
19 |  |  |  |  | !defined(&dl_error);
20 |  |  |  |  | package XSLoader;
21 |  |  |  |  |
22 |  |  |  |  | # spent 6.51ms (5.92+590µs) within XSLoader::load which was called 21 times, avg 310µs/call: # once (413µs+590µs) by JSON::BEGIN@2 at line 1456 of JSON/XS.pm # once (623µs+0s) by SimpleDB::Class::Cache::BEGIN@31 at line 29 of Memcached/libmemcached.pm # once (528µs+0s) by UUID::Tiny::BEGIN@10 at line 36 of POSIX.pm # once (422µs+0s) by IO::Uncompress::RawInflate::BEGIN@8 at line 91 of Compress/Raw/Zlib.pm # once (357µs+0s) by IO::Socket::BEGIN@12 at line 412 of Socket.pm # once (292µs+0s) by Moose::Exporter::BEGIN@11 at line 37 of Class/MOP.pm # once (286µs+0s) by Module::Find::BEGIN@8 at line 248 of Cwd.pm # once (277µs+0s) by Variable::Magic::BEGIN@204 at line 206 of Variable/Magic.pm # once (268µs+0s) by Fcntl::BEGIN@214 at line 215 of Fcntl.pm # once (266µs+0s) by UUID::Tiny::BEGIN@7 at line 24 of Digest/MD5.pm # once (255µs+0s) by Test::Deep::Cache::Simple::BEGIN@7 at line 27 of List/Util.pm # once (235µs+0s) by SimpleDB::Client::BEGIN@52 at line 13 of MIME/Base64.pm # once (234µs+0s) by Params::Validate::BEGIN@5 at line 7 of Params/ValidateXS.pm # once (231µs+0s) by Test::Deep::BEGIN@22 at line 36 of Data/Dumper.pm # once (211µs+0s) by IO::Handle::BEGIN@266 at line 11 of IO.pm # once (209µs+0s) by DateTime::BEGIN@13 at line 21 of DateTime.pm # once (206µs+0s) by Devel::GlobalDestruction::BEGIN@10 at line 17 of Devel/GlobalDestruction.pm # once (172µs+0s) by File::GlobMapper::BEGIN@10 at line 96 of File/Glob.pm # once (170µs+0s) by Sub::Identify::BEGIN@6 at line 17 of Sub/Identify.pm # once (162µs+0s) by MRO::Compat::BEGIN@10 at line 41 of mro.pm # once (102µs+0s) by Moose::BEGIN@14 at line 19 of Moose/Exporter.pm sub load {
23 |  |  |  |  | package DynaLoader;
24 |  |  |  |  |
25 |  |  |  |  | die q{XSLoader::load('Your::Module', $Your::Module::VERSION)} unless @_;
26 |  |  |  |  |
27 |  |  |  |  | my($module) = $_[0];
28 |  |  |  |  |
29 |  |  |  |  | # work with static linking too
30 |  |  |  |  | my $boots = "$module\::bootstrap";
31 |  |  |  |  | goto &$boots if defined &$boots;
32 |  |  |  |  |
33 |  |  |  |  | goto retry unless $module and defined &dl_load_file;
34 |  |  |  |  |
35 |  |  |  |  | my @modparts = split(/::/,$module);
36 |  |  |  |  | my $modfname = $modparts[-1];
37 |  |  |  |  |
38 |  |  |  |  | my $modpname = join('/',@modparts);
39 |  |  |  |  | my $modlibname = (caller())[1];
40 |  |  |  |  | my $c = @modparts;
41 |  |  |  |  | $modlibname =~ s,[\\/][^\\/]+$,, while $c--; # Q&D basename
42 |  |  |  |  | my $file = "$modlibname/auto/$modpname/$modfname.$dl_dlext";
43 |  |  |  |  |
44 |  |  |  |  | # print STDERR "XSLoader::load for $module ($file)\n" if $dl_debug;
45 |  |  |  |  |
46 |  |  |  |  | my $bs = $file;
47 |  |  |  |  | $bs =~ s/(\.\w+)?(;\d*)?$/\.bs/; # look for .bs 'beside' the library
48 |  |  |  |  |
49 |  |  |  |  | if (-s $bs) { # only read file if it's not empty
50 |  |  |  |  | # print STDERR "BS: $bs ($^O, $dlsrc)\n" if $dl_debug;
51 |  |  |  |  | eval { do $bs; };
52 |  |  |  |  | warn "$bs: $@\n" if $@;
53 |  |  |  |  | }
54 |  |  |  |  |
55 |  |  |  |  | goto retry if not -f $file or -s $bs;
56 |  |  |  |  |
57 |  |  |  |  | my $bootname = "boot_$module";
58 |  |  |  |  | $bootname =~ s/\W/_/g;
59 |  |  |  |  | @DynaLoader::dl_require_symbols = ($bootname);
60 |  |  |  |  |
61 |  |  |  |  | my $boot_symbol_ref;
62 |  |  |  |  |
63 |  |  |  |  | if ($boot_symbol_ref = dl_find_symbol(0, $bootname)) {
64 |  |  |  |  | goto boot; #extension library has already been loaded, e.g. darwin
65 |  |  |  |  | }
66 |  |  |  |  | # Many dynamic extension loading problems will appear to come from
67 |  |  |  |  | # this section of code: XYZ failed at line 123 of DynaLoader.pm.
68 |  |  |  |  | # Often these errors are actually occurring in the initialisation
69 |  |  |  |  | # C code of the extension XS file. Perl reports the error as being
70 |  |  |  |  | # in this perl code simply because this was the last perl code
71 |  |  |  |  | # it executed.
72 |  |  |  |  |
73 |  |  |  |  | my $libref = dl_load_file($file, 0) or do {
74 |  |  |  |  | require Carp;
75 |  |  |  |  | Carp::croak("Can't load '$file' for module $module: " . dl_error());
76 |  |  |  |  | };
77 |  |  |  |  | push(@DynaLoader::dl_librefs,$libref); # record loaded object
78 |  |  |  |  |
79 |  |  |  |  | my @unresolved = dl_undef_symbols();
80 |  |  |  |  | if (@unresolved) {
81 |  |  |  |  | require Carp;
82 |  |  |  |  | Carp::carp("Undefined symbols present after loading $file: @unresolved\n");
83 |  |  |  |  | }
84 |  |  |  |  |
85 |  |  |  |  | $boot_symbol_ref = dl_find_symbol($libref, $bootname) or do {
86 |  |  |  |  | require Carp;
87 |  |  |  |  | Carp::croak("Can't find '$bootname' symbol in $file\n");
88 |  |  |  |  | };
89 |  |  |  |  |
90 |  |  |  |  | push(@DynaLoader::dl_modules, $module); # record loaded module
91 |  |  |  |  |
92 |  |  |  |  | boot:
93 |  |  |  |  | my $xs = dl_install_xsub($boots, $boot_symbol_ref, $file);
94 |  |  |  |  |
95 |  |  |  |  | # See comment block above
96 |  |  |  |  | push(@DynaLoader::dl_shared_objects, $file); # record files loaded
97 | 3 | 127µs | 1 | 28µs | return &$xs(@_); # spent 28µs making 1 call to attributes::import
98 |  |  |  |  |
99 |  |  |  |  | retry:
100 |  |  |  |  | my $bootstrap_inherit = DynaLoader->can('bootstrap_inherit') ||
101 |  |  |  |  | XSLoader->can('bootstrap_inherit');
102 |  |  |  |  | goto &$bootstrap_inherit;
103 |  |  |  |  | }
104 |  |  |  |  |
105 |  |  |  |  | # Versions of DynaLoader prior to 5.6.0 don't have this function.
106 |  |  |  |  | sub bootstrap_inherit {
107 |  |  |  |  | package DynaLoader;
108 |  |  |  |  |
109 |  |  |  |  | my $module = $_[0];
110 |  |  |  |  | local *DynaLoader::isa = *{"$module\::ISA"};
111 |  |  |  |  | local @DynaLoader::isa = (@DynaLoader::isa, 'DynaLoader');
112 |  |  |  |  | # Cannot goto due to delocalization. Will report errors on a wrong line?
113 |  |  |  |  | require DynaLoader;
114 |  |  |  |  | DynaLoader::bootstrap(@_);
115 |  |  |  |  | }
116 |  |  |  |  |
117 |  |  |  |  | 1;
118 |  |  |  |  |
119 |  |  |  |  |
120 |  |  |  |  | __END__
121 |  |  |  |  |
122 |  |  |  |  | =head1 NAME
123 |  |  |  |  |
124 |  |  |  |  | XSLoader - Dynamically load C libraries into Perl code
125 |  |  |  |  |
126 |  |  |  |  | =head1 VERSION
127 |  |  |  |  |
128 |  |  |  |  | Version 0.10
129 |  |  |  |  |
130 |  |  |  |  | =head1 SYNOPSIS
131 |  |  |  |  |
132 |  |  |  |  | package YourPackage;
133 |  |  |  |  | use XSLoader;
134 |  |  |  |  |
135 |  |  |  |  | XSLoader::load 'YourPackage', $YourPackage::VERSION;
136 |  |  |  |  |
137 |  |  |  |  | =head1 DESCRIPTION
138 |  |  |  |  |
139 |  |  |  |  | This module defines a standard I<simplified> interface to the dynamic
140 |  |  |  |  | linking mechanisms available on many platforms. Its primary purpose is
141 |  |  |  |  | to implement cheap automatic dynamic loading of Perl modules.
142 |  |  |  |  |
143 |  |  |  |  | For a more complicated interface, see L<DynaLoader>. Many (most)
144 |  |  |  |  | features of C<DynaLoader> are not implemented in C<XSLoader>, like for
145 |  |  |  |  | example the C<dl_load_flags>, not honored by C<XSLoader>.
146 |  |  |  |  |
147 |  |  |  |  | =head2 Migration from C<DynaLoader>
148 |  |  |  |  |
149 |  |  |  |  | A typical module using L<DynaLoader|DynaLoader> starts like this:
150 |  |  |  |  |
151 |  |  |  |  | package YourPackage;
152 |  |  |  |  | require DynaLoader;
153 |  |  |  |  |
154 |  |  |  |  | our @ISA = qw( OnePackage OtherPackage DynaLoader );
155 |  |  |  |  | our $VERSION = '0.01';
156 |  |  |  |  | bootstrap YourPackage $VERSION;
157 |  |  |  |  |
158 |  |  |  |  | Change this to
159 |  |  |  |  |
160 |  |  |  |  | package YourPackage;
161 |  |  |  |  | use XSLoader;
162 |  |  |  |  |
163 |  |  |  |  | our @ISA = qw( OnePackage OtherPackage );
164 |  |  |  |  | our $VERSION = '0.01';
165 |  |  |  |  | XSLoader::load 'YourPackage', $VERSION;
166 |  |  |  |  |
167 |  |  |  |  | In other words: replace C<require DynaLoader> by C<use XSLoader>, remove
168 |  |  |  |  | C<DynaLoader> from C<@ISA>, change C<bootstrap> by C<XSLoader::load>. Do not
169 |  |  |  |  | forget to quote the name of your package on the C<XSLoader::load> line,
170 |  |  |  |  | and add comma (C<,>) before the arguments (C<$VERSION> above).
171 |  |  |  |  |
172 |  |  |  |  | Of course, if C<@ISA> contained only C<DynaLoader>, there is no need to have
173 |  |  |  |  | the C<@ISA> assignment at all; moreover, if instead of C<our> one uses the
174 |  |  |  |  | more backward-compatible
175 |  |  |  |  |
176 |  |  |  |  | use vars qw($VERSION @ISA);
177 |  |  |  |  |
178 |  |  |  |  | one can remove this reference to C<@ISA> together with the C<@ISA> assignment.
179 |  |  |  |  |
180 |  |  |  |  | If no C<$VERSION> was specified on the C<bootstrap> line, the last line becomes
181 |  |  |  |  |
182 |  |  |  |  | XSLoader::load 'YourPackage';
183 |  |  |  |  |
184 |  |  |  |  | =head2 Backward compatible boilerplate
185 |  |  |  |  |
186 |  |  |  |  | If you want to have your cake and eat it too, you need a more complicated
187 |  |  |  |  | boilerplate.
188 |  |  |  |  |
189 |  |  |  |  | package YourPackage;
190 |  |  |  |  | use vars qw($VERSION @ISA);
191 |  |  |  |  |
192 |  |  |  |  | @ISA = qw( OnePackage OtherPackage );
193 |  |  |  |  | $VERSION = '0.01';
194 |  |  |  |  | eval {
195 |  |  |  |  | require XSLoader;
196 |  |  |  |  | XSLoader::load('YourPackage', $VERSION);
197 |  |  |  |  | 1;
198 |  |  |  |  | } or do {
199 |  |  |  |  | require DynaLoader;
200 |  |  |  |  | push @ISA, 'DynaLoader';
201 |  |  |  |  | bootstrap YourPackage $VERSION;
202 |  |  |  |  | };
203 |  |  |  |  |
204 |  |  |  |  | The parentheses about C<XSLoader::load()> arguments are needed since we replaced
205 |  |  |  |  | C<use XSLoader> by C<require>, so the compiler does not know that a function
206 |  |  |  |  | C<XSLoader::load()> is present.
207 |  |  |  |  |
208 |  |  |  |  | This boilerplate uses the low-overhead C<XSLoader> if present; if used with
209 |  |  |  |  | an antic Perl which has no C<XSLoader>, it falls back to using C<DynaLoader>.
210 |  |  |  |  |
211 |  |  |  |  | =head1 Order of initialization: early load()
212 |  |  |  |  |
213 |  |  |  |  | I<Skip this section if the XSUB functions are supposed to be called from other
214 |  |  |  |  | modules only; read it only if you call your XSUBs from the code in your module,
215 |  |  |  |  | or have a C<BOOT:> section in your XS file (see L<perlxs/"The BOOT: Keyword">).
216 |  |  |  |  | What is described here is equally applicable to the L<DynaLoader|DynaLoader>
217 |  |  |  |  | interface.>
218 |  |  |  |  |
219 |  |  |  |  | A sufficiently complicated module using XS would have both Perl code (defined
220 |  |  |  |  | in F<YourPackage.pm>) and XS code (defined in F<YourPackage.xs>). If this
221 |  |  |  |  | Perl code makes calls into this XS code, and/or this XS code makes calls to
222 |  |  |  |  | the Perl code, one should be careful with the order of initialization.
223 |  |  |  |  |
224 |  |  |  |  | The call to C<XSLoader::load()> (or C<bootstrap()>) has three side effects:
225 |  |  |  |  |
226 |  |  |  |  | =over
227 |  |  |  |  |
228 |  |  |  |  | =item *
229 |  |  |  |  |
230 |  |  |  |  | if C<$VERSION> was specified, a sanity check is done to ensure that the
231 |  |  |  |  | versions of the F<.pm> and the (compiled) F<.xs> parts are compatible;
232 |  |  |  |  |
233 |  |  |  |  | =item *
234 |  |  |  |  |
235 |  |  |  |  | the XSUBs are made accessible from Perl;
236 |  |  |  |  |
237 |  |  |  |  | =item *
238 |  |  |  |  |
239 |  |  |  |  | if a C<BOOT:> section was present in the F<.xs> file, the code there is called.
240 |  |  |  |  |
241 |  |  |  |  | =back
242 |  |  |  |  |
243 |  |  |  |  | Consequently, if the code in the F<.pm> file makes calls to these XSUBs, it is
244 |  |  |  |  | convenient to have XSUBs installed before the Perl code is defined; for
245 |  |  |  |  | example, this makes prototypes for XSUBs visible to this Perl code.
246 |  |  |  |  | Alternatively, if the C<BOOT:> section makes calls to Perl functions (or
247 |  |  |  |  | uses Perl variables) defined in the F<.pm> file, they must be defined prior to
248 |  |  |  |  | the call to C<XSLoader::load()> (or C<bootstrap()>).
249 |  |  |  |  |
250 |  |  |  |  | The first situation being much more frequent, it makes sense to rewrite the
251 |  |  |  |  | boilerplate as
252 |  |  |  |  |
253 |  |  |  |  | package YourPackage;
254 |  |  |  |  | use XSLoader;
255 |  |  |  |  | use vars qw($VERSION @ISA);
256 |  |  |  |  |
257 |  |  |  |  | BEGIN {
258 |  |  |  |  | @ISA = qw( OnePackage OtherPackage );
259 |  |  |  |  | $VERSION = '0.01';
260 |  |  |  |  |
261 |  |  |  |  | # Put Perl code used in the BOOT: section here
262 |  |  |  |  |
263 |  |  |  |  | XSLoader::load 'YourPackage', $VERSION;
264 |  |  |  |  | }
265 |  |  |  |  |
266 |  |  |  |  | # Put Perl code making calls into XSUBs here
267 |  |  |  |  |
268 |  |  |  |  | =head2 The most hairy case
269 |  |  |  |  |
270 |  |  |  |  | If the interdependence of your C<BOOT:> section and Perl code is
271 |  |  |  |  | more complicated than this (e.g., the C<BOOT:> section makes calls to Perl
272 |  |  |  |  | functions which make calls to XSUBs with prototypes), get rid of the C<BOOT:>
273 |  |  |  |  | section altogether. Replace it with a function C<onBOOT()>, and call it like
274 |  |  |  |  | this:
275 |  |  |  |  |
276 |  |  |  |  | package YourPackage;
277 |  |  |  |  | use XSLoader;
278 |  |  |  |  | use vars qw($VERSION @ISA);
279 |  |  |  |  |
280 |  |  |  |  | BEGIN {
281 |  |  |  |  | @ISA = qw( OnePackage OtherPackage );
282 |  |  |  |  | $VERSION = '0.01';
283 |  |  |  |  | XSLoader::load 'YourPackage', $VERSION;
284 |  |  |  |  | }
285 |  |  |  |  |
286 |  |  |  |  | # Put Perl code used in onBOOT() function here; calls to XSUBs are
287 |  |  |  |  | # prototype-checked.
288 |  |  |  |  |
289 |  |  |  |  | onBOOT;
290 |  |  |  |  |
291 |  |  |  |  | # Put Perl initialization code assuming that XS is initialized here
292 |  |  |  |  |
293 |  |  |  |  |
294 |  |  |  |  | =head1 DIAGNOSTICS
295 |  |  |  |  |
296 |  |  |  |  | =over
297 |  |  |  |  |
298 |  |  |  |  | =item C<Can't find '%s' symbol in %s>
299 |  |  |  |  |
300 |  |  |  |  | B<(F)> The bootstrap symbol could not be found in the extension module.
301 |  |  |  |  |
302 |  |  |  |  | =item C<Can't load '%s' for module %s: %s>
303 |  |  |  |  |
304 |  |  |  |  | B<(F)> The loading or initialisation of the extension module failed.
305 |  |  |  |  | The detailed error follows.
306 |  |  |  |  |
307 |  |  |  |  | =item C<Undefined symbols present after loading %s: %s>
308 |  |  |  |  |
309 |  |  |  |  | B<(W)> As the message says, some symbols stay undefined although the
310 |  |  |  |  | extension module was correctly loaded and initialised. The list of undefined
311 |  |  |  |  | symbols follows.
312 |  |  |  |  |
313 |  |  |  |  | =item C<XSLoader::load('Your::Module', $Your::Module::VERSION)>
314 |  |  |  |  |
315 |  |  |  |  | B<(F)> You tried to invoke C<load()> without any argument. You must supply
316 |  |  |  |  | a module name, and optionally its version.
317 |  |  |  |  |
318 |  |  |  |  | =back
319 |  |  |  |  |
320 |  |  |  |  |
321 |  |  |  |  | =head1 LIMITATIONS
322 |  |  |  |  |
323 |  |  |  |  | To reduce the overhead as much as possible, only one possible location
324 |  |  |  |  | is checked to find the extension DLL (this location is where C<make install>
325 |  |  |  |  | would put the DLL). If not found, the search for the DLL is transparently
326 |  |  |  |  | delegated to C<DynaLoader>, which looks for the DLL along the C<@INC> list.
327 |  |  |  |  |
328 |  |  |  |  | In particular, this is applicable to the structure of C<@INC> used for testing
329 |  |  |  |  | not-yet-installed extensions. This means that running uninstalled extensions
330 |  |  |  |  | may have much more overhead than running the same extensions after
331 |  |  |  |  | C<make install>.
332 |  |  |  |  |
333 |  |  |  |  |
334 |  |  |  |  | =head1 BUGS
335 |  |  |  |  |
336 |  |  |  |  | Please report any bugs or feature requests via the perlbug(1) utility.
337 |  |  |  |  |
338 |  |  |  |  |
339 |  |  |  |  | =head1 SEE ALSO
340 |  |  |  |  |
341 |  |  |  |  | L<DynaLoader>
342 |  |  |  |  |
343 |  |  |  |  |
344 |  |  |  |  | =head1 AUTHORS
345 |  |  |  |  |
346 |  |  |  |  | Ilya Zakharevich originally extracted C<XSLoader> from C<DynaLoader>.
347 |  |  |  |  |
348 |  |  |  |  | CPAN version is currently maintained by SE<eacute>bastien Aperghis-Tramoni
349 |  |  |  |  | E<lt>sebastien@aperghis.netE<gt>.
350 |  |  |  |  |
351 |  |  |  |  | Previous maintainer was Michael G Schwern <schwern@pobox.com>.
352 |  |  |  |  |
353 |  |  |  |  |
354 |  |  |  |  | =head1 COPYRIGHT & LICENSE
355 |  |  |  |  |
356 |  |  |  |  | Copyright (C) 1990-2007 by Larry Wall and others.
357 |  |  |  |  |
358 |  |  |  |  | This program is free software; you can redistribute it and/or modify
359 |  |  |  |  | it under the same terms as Perl itself.
360 |  |  |  |  |
361 |  |  |  |  | =cut