/usr/share/perl5/Devel/Confess/Builtin.pm is in libdevel-confess-perl 0.009004-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | package Devel::Confess::Builtin;
use strict;
use warnings FATAL => 'all';
no warnings 'once';
our $VERSION = '0.009004';
$VERSION = eval $VERSION;
use Devel::Confess::_Util ();
{
package #hide
Devel::Confess::Builtin::_Guard;
use overload bool => sub () { 0 };
sub new { bless [@_[1 .. $#_]], $_[0] }
sub DESTROY {
return
if Devel::Confess::_Util::_global_destruction;
$_->() for @{$_[0]}
}
}
our %CLASS = (
'Exception::Class::Base' => {
enable => sub { Exception::Class::Base->Trace(1) },
store => '$Exception::Class::BASE_EXC_CLASS',
},
'Ouch' => {
enable => sub { overload::OVERLOAD('Ouch', '""', 'trace') },
store => '@Ouch::EXPORT_OK',
},
'Class::Throwable' => {
enable => sub { $Class::Throwable::DEFAULT_VERBOSITY = 2 },
store => '$Class::Throwable::DEFAULT_VERBOSITY',
},
'Exception::Base' => {
enable => sub { Exception::Base->import(verbosity => 3) },
store => sub {
my $guard = shift;
$Exception::Base::_qualify_to_ref
= Devel::Confess::Builtin::_Guard->new(sub {
$Exception::Base::VERSION = $guard;
});
},
},
);
sub import {
my ($class, @enable) = @_;
@enable = keys %CLASS
unless @enable;
for my $class (@enable) {
my $class_data = $CLASS{$class} or die "invalid class $class!";
next if $class_data->{enabled};
(my $module = "$class.pm") =~ s{::}{/}g;
if ($INC{$module}) {
$class_data->{enable}->();
$Devel::Confess::NoTrace{$class}++;
}
else {
my $store = $class_data->{store};
my $guard = Devel::Confess::Builtin::_Guard->new(
$class_data->{enable},
sub { $Devel::Confess::NoTrace{$class}++ },
);
if (ref $store) {
$store->($guard);
}
else {
eval $store . ' = $guard; 1' or die $@;
}
}
$class_data->{enabled}++;
}
}
sub unimport {
my ($class, @disable) = @_;
@disable = keys %CLASS
unless @disable;
for my $class (@disable) {
my $class_data = $CLASS{$class} or die "invalid class $class!";
next unless $class_data->{enabled};
(my $module = "$class.pm") =~ s{::}{/}g;
if ($INC{$module}) {
# can't really disable if it's already been loaded, so just do nothing
}
else {
my $store = $class_data->{store};
if (ref $store) {
$class_data->{disable}->();
}
else {
eval q{
my ($guard) = }.$store.q{;
@$guard = ();
}.$store.q{ = ();
1;
} or die $@;
}
$class_data->{enabled}--;
$Devel::Confess::NoTrace{$class}--;
}
}
}
1;
__END__
=head1 NAME
Devel::Confess::Builtin - Enable built in stack traces on exception objects
=head1 SYNOPSIS
use Devel::Confess::Builtin;
use Exception::Class 'MyException';
MyException->throw; # includes stack trace
=head1 DESCRIPTION
Many existing exception module can provide stack traces, but this
is often not the default setting. This module will force as many
modules as possible to include stack traces by default. It can be
loaded before or after the exception modules, and it will still
function.
For supported modules, it will also prevent L<Devel::Confess>
from attaching its own stack traces.
=head1 SUPPORTED MODULES
=over 4
=item *
L<Exception::Class>
=item *
L<Ouch>
=item *
L<Class::Throwable>
=item *
L<Exception::Base>
=back
=head1 CAVEATS
This module relies partly on the internal implementation of the
modules it effects. Future updates to the modules could break or
be broken by this module.
=cut
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