File | /usr/local/lib/perl5/5.10.1/Carp/Heavy.pm |
Statements Executed | 20 |
Statement Execution Time | 9.85ms |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
1 | 1 | 1 | 13µs | 45µs | BEGIN@11 | Carp::
1 | 1 | 1 | 11µs | 23µs | BEGIN@300 | Carp::
1 | 1 | 1 | 7µs | 15µs | BEGIN@301 | Carp::
0 | 0 | 0 | 0s | 0s | caller_info | Carp::
0 | 0 | 0 | 0s | 0s | format_arg | Carp::
0 | 0 | 0 | 0s | 0s | get_status | Carp::
0 | 0 | 0 | 0s | 0s | get_subname | Carp::
0 | 0 | 0 | 0s | 0s | long_error_loc | Carp::
0 | 0 | 0 | 0s | 0s | longmess_heavy | Carp::
0 | 0 | 0 | 0s | 0s | longmess_real | Carp::
0 | 0 | 0 | 0s | 0s | ret_backtrace | Carp::
0 | 0 | 0 | 0s | 0s | ret_summary | Carp::
0 | 0 | 0 | 0s | 0s | short_error_loc | Carp::
0 | 0 | 0 | 0s | 0s | shortmess_heavy | Carp::
0 | 0 | 0 | 0s | 0s | shortmess_real | Carp::
0 | 0 | 0 | 0s | 0s | str_len_trim | Carp::
0 | 0 | 0 | 0s | 0s | trusts | Carp::
0 | 0 | 0 | 0s | 0s | trusts_directly | Carp::
Line | State ments |
Time on line |
Calls | Time in subs |
Code |
---|---|---|---|---|---|
1 | # Carp::Heavy uses some variables in common with Carp. | ||||
2 | package Carp; | ||||
3 | |||||
4 | =head1 NAME | ||||
5 | |||||
6 | Carp::Heavy - heavy machinery, no user serviceable parts inside | ||||
7 | |||||
8 | =cut | ||||
9 | |||||
10 | # On one line so MakeMaker will see it. | ||||
11 | 4 | 990µs | 2 | 78µs | # spent 45µs (13+32) within Carp::BEGIN@11 which was called
# once (13µs+32µs) by Moose::Error::Default::BEGIN@10 at line 11 # spent 45µs making 1 call to Carp::BEGIN@11
# spent 32µs making 1 call to Exporter::import |
12 | # use strict; # not yet | ||||
13 | |||||
14 | # 'use Carp' just installs some very lightweight stubs; the first time | ||||
15 | # these are called, they require Carp::Heavy which installs the real | ||||
16 | # routines. | ||||
17 | |||||
18 | # The members of %Internal are packages that are internal to perl. | ||||
19 | # Carp will not report errors from within these packages if it | ||||
20 | # can. The members of %CarpInternal are internal to Perl's warning | ||||
21 | # system. Carp will not report errors from within these packages | ||||
22 | # either, and will not report calls *to* these packages for carp and | ||||
23 | # croak. They replace $CarpLevel, which is deprecated. The | ||||
24 | # $Max(EvalLen|(Arg(Len|Nums)) variables are used to specify how the eval | ||||
25 | # text and function arguments should be formatted when printed. | ||||
26 | |||||
27 | # disable these by default, so they can live w/o require Carp | ||||
28 | 1 | 2µs | $CarpInternal{Carp}++; | ||
29 | 1 | 200ns | $CarpInternal{warnings}++; | ||
30 | 1 | 800ns | $Internal{Exporter}++; | ||
31 | 1 | 400ns | $Internal{'Exporter::Heavy'}++; | ||
32 | |||||
33 | |||||
34 | 1 | 400ns | our ($CarpLevel, $MaxArgNums, $MaxEvalLen, $MaxArgLen, $Verbose); | ||
35 | |||||
36 | # XXX longmess_real and shortmess_real should really be merged into | ||||
37 | # XXX {long|sort}mess_heavy at some point | ||||
38 | |||||
39 | sub longmess_real { | ||||
40 | # Icky backwards compatibility wrapper. :-( | ||||
41 | # | ||||
42 | # The story is that the original implementation hard-coded the | ||||
43 | # number of call levels to go back, so calls to longmess were off | ||||
44 | # by one. Other code began calling longmess and expecting this | ||||
45 | # behaviour, so the replacement has to emulate that behaviour. | ||||
46 | my $call_pack = caller(); | ||||
47 | if ($Internal{$call_pack} or $CarpInternal{$call_pack}) { | ||||
48 | return longmess_heavy(@_); | ||||
49 | } | ||||
50 | else { | ||||
51 | local $CarpLevel = $CarpLevel + 1; | ||||
52 | return longmess_heavy(@_); | ||||
53 | } | ||||
54 | }; | ||||
55 | |||||
56 | sub shortmess_real { | ||||
57 | # Icky backwards compatibility wrapper. :-( | ||||
58 | local @CARP_NOT = caller(); | ||||
59 | shortmess_heavy(@_); | ||||
60 | }; | ||||
61 | |||||
62 | # replace the two hooks added by Carp | ||||
63 | |||||
64 | # aliasing the whole glob rather than just the CV slot avoids 'redefined' | ||||
65 | # warnings, even in the presence of perl -W (as used by lib/warnings.t !) | ||||
66 | # However it has the potential to create infinite loops, if somehow Carp | ||||
67 | # is forcibly reloaded, but $INC{"Carp/Heavy.pm"} remains true. | ||||
68 | # Hence the extra hack of deleting the previous typeglob first. | ||||
69 | |||||
70 | 1 | 2µs | delete $Carp::{shortmess_jmp}; | ||
71 | 1 | 300ns | delete $Carp::{longmess_jmp}; | ||
72 | 1 | 11µs | *longmess_jmp = *longmess_real; | ||
73 | 1 | 10µs | *shortmess_jmp = *shortmess_real; | ||
74 | |||||
75 | |||||
76 | sub caller_info { | ||||
77 | my $i = shift(@_) + 1; | ||||
78 | package DB; | ||||
79 | my %call_info; | ||||
80 | @call_info{ | ||||
81 | qw(pack file line sub has_args wantarray evaltext is_require) | ||||
82 | } = caller($i); | ||||
83 | |||||
84 | unless (defined $call_info{pack}) { | ||||
85 | return (); | ||||
86 | } | ||||
87 | |||||
88 | my $sub_name = Carp::get_subname(\%call_info); | ||||
89 | if ($call_info{has_args}) { | ||||
90 | my @args = map {Carp::format_arg($_)} @DB::args; | ||||
91 | if ($MaxArgNums and @args > $MaxArgNums) { # More than we want to show? | ||||
92 | $#args = $MaxArgNums; | ||||
93 | push @args, '...'; | ||||
94 | } | ||||
95 | # Push the args onto the subroutine | ||||
96 | $sub_name .= '(' . join (', ', @args) . ')'; | ||||
97 | } | ||||
98 | $call_info{sub_name} = $sub_name; | ||||
99 | return wantarray() ? %call_info : \%call_info; | ||||
100 | } | ||||
101 | |||||
102 | # Transform an argument to a function into a string. | ||||
103 | sub format_arg { | ||||
104 | my $arg = shift; | ||||
105 | if (ref($arg)) { | ||||
106 | $arg = defined($overload::VERSION) ? overload::StrVal($arg) : "$arg"; | ||||
107 | } | ||||
108 | if (defined($arg)) { | ||||
109 | $arg =~ s/'/\\'/g; | ||||
110 | $arg = str_len_trim($arg, $MaxArgLen); | ||||
111 | |||||
112 | # Quote it? | ||||
113 | $arg = "'$arg'" unless $arg =~ /^-?[\d.]+\z/; | ||||
114 | } else { | ||||
115 | $arg = 'undef'; | ||||
116 | } | ||||
117 | |||||
118 | # The following handling of "control chars" is direct from | ||||
119 | # the original code - it is broken on Unicode though. | ||||
120 | # Suggestions? | ||||
121 | utf8::is_utf8($arg) | ||||
122 | or $arg =~ s/([[:cntrl:]]|[[:^ascii:]])/sprintf("\\x{%x}",ord($1))/eg; | ||||
123 | return $arg; | ||||
124 | } | ||||
125 | |||||
126 | # Takes an inheritance cache and a package and returns | ||||
127 | # an anon hash of known inheritances and anon array of | ||||
128 | # inheritances which consequences have not been figured | ||||
129 | # for. | ||||
130 | sub get_status { | ||||
131 | my $cache = shift; | ||||
132 | my $pkg = shift; | ||||
133 | $cache->{$pkg} ||= [{$pkg => $pkg}, [trusts_directly($pkg)]]; | ||||
134 | return @{$cache->{$pkg}}; | ||||
135 | } | ||||
136 | |||||
137 | # Takes the info from caller() and figures out the name of | ||||
138 | # the sub/require/eval | ||||
139 | sub get_subname { | ||||
140 | my $info = shift; | ||||
141 | if (defined($info->{evaltext})) { | ||||
142 | my $eval = $info->{evaltext}; | ||||
143 | if ($info->{is_require}) { | ||||
144 | return "require $eval"; | ||||
145 | } | ||||
146 | else { | ||||
147 | $eval =~ s/([\\\'])/\\$1/g; | ||||
148 | return "eval '" . str_len_trim($eval, $MaxEvalLen) . "'"; | ||||
149 | } | ||||
150 | } | ||||
151 | |||||
152 | return ($info->{sub} eq '(eval)') ? 'eval {...}' : $info->{sub}; | ||||
153 | } | ||||
154 | |||||
155 | # Figures out what call (from the point of view of the caller) | ||||
156 | # the long error backtrace should start at. | ||||
157 | sub long_error_loc { | ||||
158 | my $i; | ||||
159 | my $lvl = $CarpLevel; | ||||
160 | { | ||||
161 | my $pkg = caller(++$i); | ||||
162 | unless(defined($pkg)) { | ||||
163 | # This *shouldn't* happen. | ||||
164 | if (%Internal) { | ||||
165 | local %Internal; | ||||
166 | $i = long_error_loc(); | ||||
167 | last; | ||||
168 | } | ||||
169 | else { | ||||
170 | # OK, now I am irritated. | ||||
171 | return 2; | ||||
172 | } | ||||
173 | } | ||||
174 | redo if $CarpInternal{$pkg}; | ||||
175 | redo unless 0 > --$lvl; | ||||
176 | redo if $Internal{$pkg}; | ||||
177 | } | ||||
178 | return $i - 1; | ||||
179 | } | ||||
180 | |||||
181 | |||||
182 | sub longmess_heavy { | ||||
183 | return @_ if ref($_[0]); # don't break references as exceptions | ||||
184 | my $i = long_error_loc(); | ||||
185 | return ret_backtrace($i, @_); | ||||
186 | } | ||||
187 | |||||
188 | # Returns a full stack backtrace starting from where it is | ||||
189 | # told. | ||||
190 | sub ret_backtrace { | ||||
191 | my ($i, @error) = @_; | ||||
192 | my $mess; | ||||
193 | my $err = join '', @error; | ||||
194 | $i++; | ||||
195 | |||||
196 | my $tid_msg = ''; | ||||
197 | if (defined &threads::tid) { | ||||
198 | my $tid = threads->tid; | ||||
199 | $tid_msg = " thread $tid" if $tid; | ||||
200 | } | ||||
201 | |||||
202 | my %i = caller_info($i); | ||||
203 | $mess = "$err at $i{file} line $i{line}$tid_msg\n"; | ||||
204 | |||||
205 | while (my %i = caller_info(++$i)) { | ||||
206 | $mess .= "\t$i{sub_name} called at $i{file} line $i{line}$tid_msg\n"; | ||||
207 | } | ||||
208 | |||||
209 | return $mess; | ||||
210 | } | ||||
211 | |||||
212 | sub ret_summary { | ||||
213 | my ($i, @error) = @_; | ||||
214 | my $err = join '', @error; | ||||
215 | $i++; | ||||
216 | |||||
217 | my $tid_msg = ''; | ||||
218 | if (defined &threads::tid) { | ||||
219 | my $tid = threads->tid; | ||||
220 | $tid_msg = " thread $tid" if $tid; | ||||
221 | } | ||||
222 | |||||
223 | my %i = caller_info($i); | ||||
224 | return "$err at $i{file} line $i{line}$tid_msg\n"; | ||||
225 | } | ||||
226 | |||||
227 | |||||
228 | sub short_error_loc { | ||||
229 | # You have to create your (hash)ref out here, rather than defaulting it | ||||
230 | # inside trusts *on a lexical*, as you want it to persist across calls. | ||||
231 | # (You can default it on $_[2], but that gets messy) | ||||
232 | my $cache = {}; | ||||
233 | my $i = 1; | ||||
234 | my $lvl = $CarpLevel; | ||||
235 | { | ||||
236 | my $called = caller($i++); | ||||
237 | my $caller = caller($i); | ||||
238 | |||||
239 | return 0 unless defined($caller); # What happened? | ||||
240 | redo if $Internal{$caller}; | ||||
241 | redo if $CarpInternal{$caller}; | ||||
242 | redo if $CarpInternal{$called}; | ||||
243 | redo if trusts($called, $caller, $cache); | ||||
244 | redo if trusts($caller, $called, $cache); | ||||
245 | redo unless 0 > --$lvl; | ||||
246 | } | ||||
247 | return $i - 1; | ||||
248 | } | ||||
249 | |||||
250 | |||||
251 | sub shortmess_heavy { | ||||
252 | return longmess_heavy(@_) if $Verbose; | ||||
253 | return @_ if ref($_[0]); # don't break references as exceptions | ||||
254 | my $i = short_error_loc(); | ||||
255 | if ($i) { | ||||
256 | ret_summary($i, @_); | ||||
257 | } | ||||
258 | else { | ||||
259 | longmess_heavy(@_); | ||||
260 | } | ||||
261 | } | ||||
262 | |||||
263 | # If a string is too long, trims it with ... | ||||
264 | sub str_len_trim { | ||||
265 | my $str = shift; | ||||
266 | my $max = shift || 0; | ||||
267 | if (2 < $max and $max < length($str)) { | ||||
268 | substr($str, $max - 3) = '...'; | ||||
269 | } | ||||
270 | return $str; | ||||
271 | } | ||||
272 | |||||
273 | # Takes two packages and an optional cache. Says whether the | ||||
274 | # first inherits from the second. | ||||
275 | # | ||||
276 | # Recursive versions of this have to work to avoid certain | ||||
277 | # possible endless loops, and when following long chains of | ||||
278 | # inheritance are less efficient. | ||||
279 | sub trusts { | ||||
280 | my $child = shift; | ||||
281 | my $parent = shift; | ||||
282 | my $cache = shift; | ||||
283 | my ($known, $partial) = get_status($cache, $child); | ||||
284 | # Figure out consequences until we have an answer | ||||
285 | while (@$partial and not exists $known->{$parent}) { | ||||
286 | my $anc = shift @$partial; | ||||
287 | next if exists $known->{$anc}; | ||||
288 | $known->{$anc}++; | ||||
289 | my ($anc_knows, $anc_partial) = get_status($cache, $anc); | ||||
290 | my @found = keys %$anc_knows; | ||||
291 | @$known{@found} = (); | ||||
292 | push @$partial, @$anc_partial; | ||||
293 | } | ||||
294 | return exists $known->{$parent}; | ||||
295 | } | ||||
296 | |||||
297 | # Takes a package and gives a list of those trusted directly | ||||
298 | sub trusts_directly { | ||||
299 | my $class = shift; | ||||
300 | 3 | 23µs | 2 | 35µs | # spent 23µs (11+12) within Carp::BEGIN@300 which was called
# once (11µs+12µs) by Moose::Error::Default::BEGIN@10 at line 300 # spent 23µs making 1 call to Carp::BEGIN@300
# spent 12µs making 1 call to strict::unimport |
301 | 3 | 8.80ms | 2 | 23µs | # spent 15µs (7+8) within Carp::BEGIN@301 which was called
# once (7µs+8µs) by Moose::Error::Default::BEGIN@10 at line 301 # spent 15µs making 1 call to Carp::BEGIN@301
# spent 8µs making 1 call to warnings::unimport |
302 | return @{"$class\::CARP_NOT"} | ||||
303 | ? @{"$class\::CARP_NOT"} | ||||
304 | : @{"$class\::ISA"}; | ||||
305 | } | ||||
306 | |||||
307 | 1 | 16µs | 1; | ||
308 |