| 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 | Carp::BEGIN@11 |
| 1 | 1 | 1 | 11µs | 23µs | Carp::BEGIN@300 |
| 1 | 1 | 1 | 7µs | 15µs | Carp::BEGIN@301 |
| 0 | 0 | 0 | 0s | 0s | Carp::caller_info |
| 0 | 0 | 0 | 0s | 0s | Carp::format_arg |
| 0 | 0 | 0 | 0s | 0s | Carp::get_status |
| 0 | 0 | 0 | 0s | 0s | Carp::get_subname |
| 0 | 0 | 0 | 0s | 0s | Carp::long_error_loc |
| 0 | 0 | 0 | 0s | 0s | Carp::longmess_heavy |
| 0 | 0 | 0 | 0s | 0s | Carp::longmess_real |
| 0 | 0 | 0 | 0s | 0s | Carp::ret_backtrace |
| 0 | 0 | 0 | 0s | 0s | Carp::ret_summary |
| 0 | 0 | 0 | 0s | 0s | Carp::short_error_loc |
| 0 | 0 | 0 | 0s | 0s | Carp::shortmess_heavy |
| 0 | 0 | 0 | 0s | 0s | Carp::shortmess_real |
| 0 | 0 | 0 | 0s | 0s | Carp::str_len_trim |
| 0 | 0 | 0 | 0s | 0s | Carp::trusts |
| 0 | 0 | 0 | 0s | 0s | Carp::trusts_directly |
| 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 |