← Index
NYTProf Performance Profile   « line view »
For examples/Atom-timer.pl
  Run on Mon Aug 12 14:45:28 2013
Reported on Mon Aug 12 14:46:14 2013

Filename/Users/dde/perl5/perlbrew/perls/5.18.0t/lib/5.18.0/darwin-thread-multi-2level/DynaLoader.pm
StatementsExecuted 212 statements in 2.55ms
Subroutines
Calls P F Exclusive
Time
Inclusive
Time
Subroutine
511340µs340µsDynaLoader::::dl_load_fileDynaLoader::dl_load_file (xsub)
555254µs1.24msDynaLoader::::bootstrapDynaLoader::bootstrap
1021153µs153µsDynaLoader::::CORE:substDynaLoader::CORE:subst (opcode)
121140µs40µsDynaLoader::::CORE:ftdirDynaLoader::CORE:ftdir (opcode)
102131µs31µsDynaLoader::::dl_find_symbolDynaLoader::dl_find_symbol (xsub)
51122µs22µsDynaLoader::::dl_install_xsubDynaLoader::dl_install_xsub (xsub)
51117µs17µsDynaLoader::::CORE:ftsizeDynaLoader::CORE:ftsize (opcode)
51115µs15µsDynaLoader::::CORE:ftfileDynaLoader::CORE:ftfile (opcode)
1117µs7µsDynaLoader::::BEGIN@18DynaLoader::BEGIN@18
1116µs15µsDynaLoader::::BEGIN@22DynaLoader::BEGIN@22
5115µs5µsDynaLoader::::dl_load_flagsDynaLoader::dl_load_flags
5114µs4µsDynaLoader::::dl_undef_symbolsDynaLoader::dl_undef_symbols (xsub)
0000s0sDynaLoader::::bootstrap_inheritDynaLoader::bootstrap_inherit
0000s0sDynaLoader::::croakDynaLoader::croak
0000s0sDynaLoader::::dl_expandspecDynaLoader::dl_expandspec
0000s0sDynaLoader::::dl_find_symbol_anywhereDynaLoader::dl_find_symbol_anywhere
0000s0sDynaLoader::::dl_findfileDynaLoader::dl_findfile
Call graph for these subroutines as a Graphviz dot language file.
Line State
ments
Time
on line
Calls Time
in subs
Code
1
2# Generated from DynaLoader_pm.PL
3
4package DynaLoader;
5
6# And Gandalf said: 'Many folk like to know beforehand what is to
7# be set on the table; but those who have laboured to prepare the
8# feast like to keep their secret; for wonder makes the words of
9# praise louder.'
10
11# (Quote from Tolkien suggested by Anno Siegel.)
12#
13# See pod text at end of file for documentation.
14# See also ext/DynaLoader/README in source tree for other information.
15#
16# Tim.Bunce@ig.co.uk, August 1994
17
18
# spent 7µs within DynaLoader::BEGIN@18 which was called: # once (7µs+0s) by main::BEGIN@3 at line 20
BEGIN {
1914µs $VERSION = '1.18';
20116µs17µs}
# spent 7µs making 1 call to DynaLoader::BEGIN@18
21
2221.25ms223µs
# spent 15µs (6+8) within DynaLoader::BEGIN@22 which was called: # once (6µs+8µs) by main::BEGIN@3 at line 22
use Config;
# spent 15µs making 1 call to DynaLoader::BEGIN@22 # spent 8µs making 1 call to Config::import
23
24# enable debug/trace messages from DynaLoader perl code
251900ns$dl_debug = $ENV{PERL_DL_DEBUG} || 0 unless defined $dl_debug;
26
27#
28# Flags to alter dl_load_file behaviour. Assigned bits:
29# 0x01 make symbols available for linking later dl_load_file's.
30# (only known to work on Solaris 2 using dlopen(RTLD_GLOBAL))
31# (ignored under VMS; effect is built-in to image linking)
32#
33# This is called as a class method $module->dl_load_flags. The
34# definition here will be inherited and result on "default" loading
35# behaviour unless a sub-class of DynaLoader defines its own version.
36#
37
3859µs
# spent 5µs within DynaLoader::dl_load_flags which was called 5 times, avg 1µs/call: # 5 times (5µs+0s) by DynaLoader::bootstrap at line 194, avg 1µs/call
sub dl_load_flags { 0x00 }
39
4019µs35µs($dl_dlext, $dl_so, $dlsrc) = @Config::Config{qw(dlext so dlsrc)};
# spent 5µs making 3 calls to Config::FETCH, avg 2µs/call
41
42
431100ns$do_expand = 0;
44
451400ns@dl_require_symbols = (); # names of symbols we need
461100ns@dl_resolve_using = (); # names of files to link with
471100ns@dl_library_path = (); # path to look for files
48
49#XSLoader.pm may have added elements before we were required
50#@dl_shared_objects = (); # shared objects for symbols we have
51#@dl_librefs = (); # things we have loaded
52#@dl_modules = (); # Modules we have loaded
53
54# This is a fix to support DLD's unfortunate desire to relink -lc
551100ns@dl_resolve_using = dl_findfile('-lc') if $dlsrc eq "dl_dld.xs";
56
57# Initialise @dl_library_path with the 'standard' library path
58# for this platform as determined by Configure.
59
6013µs11µspush(@dl_library_path, split(' ', $Config::Config{libpth}));
# spent 1µs making 1 call to Config::FETCH
61
62
6312µs11µsmy $ldlibpthname = $Config::Config{ldlibpthname};
# spent 1µs making 1 call to Config::FETCH
6412µs11µsmy $ldlibpthname_defined = defined $Config::Config{ldlibpthname};
# spent 1µs making 1 call to Config::FETCH
6512µs11µsmy $pthsep = $Config::Config{path_sep};
# spent 1µs making 1 call to Config::FETCH
66
67# Add to @dl_library_path any extra directories we can gather from environment
68# during runtime.
69
701300nsif ($ldlibpthname_defined &&
71 exists $ENV{$ldlibpthname}) {
72 push(@dl_library_path, split(/$pthsep/, $ENV{$ldlibpthname}));
73}
74
75# E.g. HP-UX supports both its native SHLIB_PATH *and* LD_LIBRARY_PATH.
76
771400nsif ($ldlibpthname_defined &&
78 $ldlibpthname ne 'LD_LIBRARY_PATH' &&
79 exists $ENV{LD_LIBRARY_PATH}) {
80 push(@dl_library_path, split(/$pthsep/, $ENV{LD_LIBRARY_PATH}));
81}
82
83
84# No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.
85# NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB
861400nsboot_DynaLoader('DynaLoader') if defined(&boot_DynaLoader) &&
87 !defined(&dl_error);
88
8910sif ($dl_debug) {
90 print STDERR "DynaLoader.pm loaded (@INC, @dl_library_path)\n";
91 print STDERR "DynaLoader not linked into this perl\n"
92 unless defined(&boot_DynaLoader);
93}
94
95115µs1; # End of main code
96
97
98sub croak { require Carp; Carp::croak(@_) }
99
100sub bootstrap_inherit {
1011600ns my $module = $_[0];
10213µs local *isa = *{"$module\::ISA"};
10319µs local @isa = (@isa, 'DynaLoader');
104 # Cannot goto due to delocalization. Will report errors on a wrong line?
10515µs1398µs bootstrap(@_);
# spent 398µs making 1 call to DynaLoader::bootstrap
106}
107
108
# spent 1.24ms (254µs+985µs) within DynaLoader::bootstrap which was called 5 times, avg 248µs/call: # once (56µs+342µs) by Moose::Exporter::BEGIN@13 at line 105 # once (41µs+198µs) by List::MoreUtils::BEGIN@9 at line 36 of List/MoreUtils.pm # once (71µs+160µs) by main::BEGIN@3 at line 66 of Time/HiRes.pm # once (44µs+154µs) by Data::OptList::BEGIN@10 at line 88 of Params/Util.pm # once (42µs+131µs) by Try::Tiny::BEGIN@1 at line 55 of Sub/Name.pm
sub bootstrap {
109 # use local vars to enable $module.bs script to edit values
11055µs local(@args) = @_;
11152µs local($module) = $args[0];
11251µs local(@dirs, $file);
113
1145600ns unless ($module) {
115 require Carp;
116 Carp::confess("Usage: DynaLoader::bootstrap(module)");
117 }
118
119 # A common error on platforms which don't support dynamic loading.
120 # Since it's fatal and potentially confusing we give a detailed message.
12151µs croak("Can't load module $module, dynamic loading not available in this perl.\n".
122 " (You may need to build a new perl executable which either supports\n".
123 " dynamic loading or has the $module module statically linked into it.)\n")
124 unless defined(&dl_load_file);
125
- -
12857µs my @modparts = split(/::/,$module);
12952µs my $modfname = $modparts[-1];
130
131 # Some systems have restrictions on files names for DLL's etc.
132 # mod2fname returns appropriate file base name (typically truncated)
133 # It may also edit @modparts if required.
1345900ns $modfname = &mod2fname(\@modparts) if defined &mod2fname;
135
136
137
13853µs my $modpname = join('/',@modparts);
139
1405800ns print STDERR "DynaLoader::bootstrap for $module ",
141 "(auto/$modpname/$modfname.$dl_dlext)\n"
142 if $dl_debug;
143
14453µs foreach (@INC) {
145
146125µs my $dir = "$_/auto/$modpname";
147
1481264µs1240µs next unless -d $dir; # skip over uninteresting directories
# spent 40µs making 12 calls to DynaLoader::CORE:ftdir, avg 3µs/call
149
150 # check for common cases to avoid autoload of dl_findfile
15154µs my $try = "$dir/$modfname.$dl_dlext";
152528µs515µs last if $file = ($do_expand) ? dl_expandspec($try) : ((-f $try) && $try);
# spent 15µs making 5 calls to DynaLoader::CORE:ftfile, avg 3µs/call
153
154 # no luck here, save dir for possible later dl_findfile search
155 push @dirs, $dir;
156 }
157 # last resort, let dl_findfile have a go in all known locations
1585200ns $file = dl_findfile(map("-L$_",@dirs,@INC), $modfname) unless $file;
159
1605200ns croak("Can't locate loadable object for module $module in \@INC (\@INC contains: @INC)")
161 unless $file; # wording similar to error from 'require'
162
163
16452µs my $bootname = "boot_$module";
165518µs510µs $bootname =~ s/\W/_/g;
# spent 10µs making 5 calls to DynaLoader::CORE:subst, avg 2µs/call
16654µs @dl_require_symbols = ($bootname);
167
168 # Execute optional '.bootstrap' perl script for this module.
169 # The .bs file can be used to configure @dl_resolve_using etc to
170 # match the needs of the individual module on this architecture.
17151µs my $bs = $file;
1725151µs5144µs $bs =~ s/(\.\w+)?(;\d*)?$/\.bs/; # look for .bs 'beside' the library
# spent 144µs making 5 calls to DynaLoader::CORE:subst, avg 29µs/call
173525µs517µs if (-s $bs) { # only read file if it's not empty
# spent 17µs making 5 calls to DynaLoader::CORE:ftsize, avg 3µs/call
174 print STDERR "BS: $bs ($^O, $dlsrc)\n" if $dl_debug;
175 eval { do $bs; };
176 warn "$bs: $@\n" if $@;
177 }
178
1795100ns my $boot_symbol_ref;
180
181
182536µs524µs if ($boot_symbol_ref = dl_find_symbol(0, $bootname)) {
# spent 24µs making 5 calls to DynaLoader::dl_find_symbol, avg 5µs/call
183 goto boot; #extension library has already been loaded, e.g. darwin
184 }
185
186
187 # Many dynamic extension loading problems will appear to come from
188 # this section of code: XYZ failed at line 123 of DynaLoader.pm.
189 # Often these errors are actually occurring in the initialisation
190 # C code of the extension XS file. Perl reports the error as being
191 # in this perl code simply because this was the last perl code
192 # it executed.
193
1945374µs10345µs my $libref = dl_load_file($file, $module->dl_load_flags) or
# spent 340µs making 5 calls to DynaLoader::dl_load_file, avg 68µs/call # spent 5µs making 5 calls to DynaLoader::dl_load_flags, avg 1µs/call
195 croak("Can't load '$file' for module $module: ".dl_error());
196
19753µs push(@dl_librefs,$libref); # record loaded object
198
199518µs54µs my @unresolved = dl_undef_symbols();
# spent 4µs making 5 calls to DynaLoader::dl_undef_symbols, avg 780ns/call
20051µs if (@unresolved) {
201 require Carp;
202 Carp::carp("Undefined symbols present after loading $file: @unresolved\n");
203 }
204
205515µs57µs $boot_symbol_ref = dl_find_symbol($libref, $bootname) or
# spent 7µs making 5 calls to DynaLoader::dl_find_symbol, avg 1µs/call
206 croak("Can't find '$bootname' symbol in $file\n");
207
20853µs push(@dl_modules, $module); # record loaded module
209
210533µs522µs boot:
# spent 22µs making 5 calls to DynaLoader::dl_install_xsub, avg 4µs/call
211 my $xs = dl_install_xsub("${module}::bootstrap", $boot_symbol_ref, $file);
212
213 # See comment block above
214
21553µs push(@dl_shared_objects, $file); # record files loaded
216
2175401µs5359µs &$xs(@args);
# spent 196µs making 1 call to Moose::bootstrap # spent 67µs making 1 call to List::MoreUtils::bootstrap # spent 40µs making 1 call to Time::HiRes::bootstrap # spent 37µs making 1 call to Params::Util::bootstrap # spent 19µs making 1 call to Sub::Name::bootstrap
218}
219
220sub dl_findfile {
221 # Read ext/DynaLoader/DynaLoader.doc for detailed information.
222 # This function does not automatically consider the architecture
223 # or the perl library auto directories.
224 my (@args) = @_;
225 my (@dirs, $dir); # which directories to search
226 my (@found); # full paths to real files we have found
227 #my $dl_ext= 'bundle'; # $Config::Config{'dlext'} suffix for perl extensions
228 #my $dl_so = 'dylib'; # $Config::Config{'so'} suffix for shared libraries
229
230 print STDERR "dl_findfile(@args)\n" if $dl_debug;
231
232 # accumulate directories but process files as they appear
233 arg: foreach(@args) {
234 # Special fast case: full filepath requires no search
235
236
237 if (m:/: && -f $_) {
238 push(@found,$_);
239 last arg unless wantarray;
240 next;
241 }
242
243
244 # Deal with directories first:
245 # Using a -L prefix is the preferred option (faster and more robust)
246 if (m:^-L:) { s/^-L//; push(@dirs, $_); next; }
247
248 # Otherwise we try to try to spot directories by a heuristic
249 # (this is a more complicated issue than it first appears)
250 if (m:/: && -d $_) { push(@dirs, $_); next; }
251
252
253
254 # Only files should get this far...
255 my(@names, $name); # what filenames to look for
256 if (m:-l: ) { # convert -lname to appropriate library name
257 s/-l//;
258 push(@names,"lib$_.$dl_so");
259 push(@names,"lib$_.a");
260 } else { # Umm, a bare name. Try various alternatives:
261 # these should be ordered with the most likely first
262 push(@names,"$_.$dl_dlext") unless m/\.$dl_dlext$/o;
263 push(@names,"$_.$dl_so") unless m/\.$dl_so$/o;
264
265 push(@names,"lib$_.$dl_so") unless m:/:;
266 push(@names,"$_.a") if !m/\.a$/ and $dlsrc eq "dl_dld.xs";
267 push(@names, $_);
268 }
269 my $dirsep = '/';
270
271 foreach $dir (@dirs, @dl_library_path) {
272 next unless -d $dir;
273
274 foreach $name (@names) {
275 my($file) = "$dir$dirsep$name";
276 print STDERR " checking in $dir for $name\n" if $dl_debug;
277 $file = ($do_expand) ? dl_expandspec($file) : (-f $file && $file);
278 #$file = _check_file($file);
279 if ($file) {
280 push(@found, $file);
281 next arg; # no need to look any further
282 }
283 }
284 }
285 }
286 if ($dl_debug) {
287 foreach(@dirs) {
288 print STDERR " dl_findfile ignored non-existent directory: $_\n" unless -d $_;
289 }
290 print STDERR "dl_findfile found: @found\n";
291 }
292 return $found[0] unless wantarray;
293 @found;
294}
295
- -
298sub dl_expandspec {
299 my($spec) = @_;
300 # Optional function invoked if DynaLoader.pm sets $do_expand.
301 # Most systems do not require or use this function.
302 # Some systems may implement it in the dl_*.xs file in which case
303 # this Perl version should be excluded at build time.
304
305 # This function is designed to deal with systems which treat some
306 # 'filenames' in a special way. For example VMS 'Logical Names'
307 # (something like unix environment variables - but different).
308 # This function should recognise such names and expand them into
309 # full file paths.
310 # Must return undef if $spec is invalid or file does not exist.
311
312 my $file = $spec; # default output to input
313
314 return undef unless -f $file;
315 print STDERR "dl_expandspec($spec) => $file\n" if $dl_debug;
316 $file;
317}
318
319sub dl_find_symbol_anywhere
320{
321 my $sym = shift;
322 my $libref;
323 foreach $libref (@dl_librefs) {
324 my $symref = dl_find_symbol($libref,$sym);
325 return $symref if $symref;
326 }
327 return undef;
328}
329
330__END__
 
# spent 40µs within DynaLoader::CORE:ftdir which was called 12 times, avg 3µs/call: # 12 times (40µs+0s) by DynaLoader::bootstrap at line 148, avg 3µs/call
sub DynaLoader::CORE:ftdir; # opcode
# spent 15µs within DynaLoader::CORE:ftfile which was called 5 times, avg 3µs/call: # 5 times (15µs+0s) by DynaLoader::bootstrap at line 152, avg 3µs/call
sub DynaLoader::CORE:ftfile; # opcode
# spent 17µs within DynaLoader::CORE:ftsize which was called 5 times, avg 3µs/call: # 5 times (17µs+0s) by DynaLoader::bootstrap at line 173, avg 3µs/call
sub DynaLoader::CORE:ftsize; # opcode
# spent 153µs within DynaLoader::CORE:subst which was called 10 times, avg 15µs/call: # 5 times (144µs+0s) by DynaLoader::bootstrap at line 172, avg 29µs/call # 5 times (10µs+0s) by DynaLoader::bootstrap at line 165, avg 2µs/call
sub DynaLoader::CORE:subst; # opcode
# spent 31µs within DynaLoader::dl_find_symbol which was called 10 times, avg 3µs/call: # 5 times (24µs+0s) by DynaLoader::bootstrap at line 182, avg 5µs/call # 5 times (7µs+0s) by DynaLoader::bootstrap at line 205, avg 1µs/call
sub DynaLoader::dl_find_symbol; # xsub
# spent 22µs within DynaLoader::dl_install_xsub which was called 5 times, avg 4µs/call: # 5 times (22µs+0s) by DynaLoader::bootstrap at line 210, avg 4µs/call
sub DynaLoader::dl_install_xsub; # xsub
# spent 340µs within DynaLoader::dl_load_file which was called 5 times, avg 68µs/call: # 5 times (340µs+0s) by DynaLoader::bootstrap at line 194, avg 68µs/call
sub DynaLoader::dl_load_file; # xsub
# spent 4µs within DynaLoader::dl_undef_symbols which was called 5 times, avg 780ns/call: # 5 times (4µs+0s) by DynaLoader::bootstrap at line 199, avg 780ns/call
sub DynaLoader::dl_undef_symbols; # xsub