1 | package Devel::FindRef; |
1 | package Devel::FindRef; |
2 | |
2 | |
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3 | no warnings; # I hate warning nazis |
3 | use strict; |
4 | use strict; |
4 | |
5 | |
5 | use XSLoader; |
6 | use XSLoader; |
6 | use Scalar::Util; |
7 | use Scalar::Util; |
7 | |
8 | |
8 | BEGIN { |
9 | BEGIN { |
9 | our $VERSION = '1.3'; |
10 | our $VERSION = '1.31'; |
10 | XSLoader::load __PACKAGE__, $VERSION; |
11 | XSLoader::load __PACKAGE__, $VERSION; |
11 | } |
12 | } |
12 | |
13 | |
13 | =head1 NAME |
14 | =head1 NAME |
14 | |
15 | |
15 | Devel::FindRef - where is that reference to my variable hiding? |
16 | Devel::FindRef - where is that reference to my variable hiding? |
16 | |
17 | |
17 | =head1 SYNOPSIS |
18 | =head1 SYNOPSIS |
18 | |
19 | |
19 | use Devel::FindRef; |
20 | use Devel::FindRef; |
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21 | |
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22 | print Devel::FindRef::track \$some_variable; |
20 | |
23 | |
21 | =head1 DESCRIPTION |
24 | =head1 DESCRIPTION |
22 | |
25 | |
23 | Tracking down reference problems (e.g. you expect some object to be |
26 | Tracking down reference problems (e.g. you expect some object to be |
24 | destroyed, but there are still references to it that keep it alive) can be |
27 | destroyed, but there are still references to it that keep it alive) can be |
… | |
… | |
119 | my (@about) = find $$refref; |
122 | my (@about) = find $$refref; |
120 | if (@about) { |
123 | if (@about) { |
121 | for my $about (@about) { |
124 | for my $about (@about) { |
122 | $buf .= "$indent" . (@about > 1 ? "+- " : " ") . $about->[0]; |
125 | $buf .= "$indent" . (@about > 1 ? "+- " : " ") . $about->[0]; |
123 | if (@$about > 1) { |
126 | if (@$about > 1) { |
124 | if ($seen{$about->[1]+0}++) { |
127 | if ($seen{ref2ptr $about->[1]}++) { |
125 | $buf .= " $about->[1], which was seen before.\n"; |
128 | $buf .= " $about->[1], which was seen before.\n"; |
126 | } else { |
129 | } else { |
127 | $buf .= " $about->[1], which is\n"; |
130 | $buf .= " $about->[1], which is\n"; |
128 | $track->(\$about->[1], $depth - 1, $about == $about[-1] ? "$indent " : "$indent| "); |
131 | $track->(\$about->[1], $depth - 1, $about == $about[-1] ? "$indent " : "$indent| "); |
129 | } |
132 | } |
… | |
… | |
157 | =cut |
160 | =cut |
158 | |
161 | |
159 | sub find($) { |
162 | sub find($) { |
160 | my ($about, $excl) = &find_; |
163 | my ($about, $excl) = &find_; |
161 | my %excl = map +($_ => undef), @$excl; |
164 | my %excl = map +($_ => undef), @$excl; |
162 | grep !exists $excl{$_->[1] + 0}, @$about |
165 | grep !exists $excl{ref2ptr $_->[1]}, @$about |
163 | } |
166 | } |
164 | |
167 | |
165 | =item $ref = Devel::FindRef::ptr2ref $integer |
168 | =item $ref = Devel::FindRef::ptr2ref $integer |
166 | |
169 | |
167 | Sometimes you know (from debugging output) the address of a perl scalar |
170 | Sometimes you know (from debugging output) the address of a perl scalar |
… | |
… | |
170 | call on valid addresses, but extremely dangerous to call on invalid ones. |
173 | call on valid addresses, but extremely dangerous to call on invalid ones. |
171 | |
174 | |
172 | # we know that HASH(0x176ff70) exists, so turn it into a hashref: |
175 | # we know that HASH(0x176ff70) exists, so turn it into a hashref: |
173 | my $ref_to_hash = Devel::FindRef::ptr2ref 0x176ff70; |
176 | my $ref_to_hash = Devel::FindRef::ptr2ref 0x176ff70; |
174 | |
177 | |
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178 | =item $ref = Devel::FindRef::ref2ptr $reference |
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179 | |
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180 | The opposite of C<ptr2ref>, above: returns the internal address of the |
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181 | value pointed to by the passed reference. I<No checks whatsoever will be |
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182 | done>, so don't use this. |
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183 | |
175 | =back |
184 | =back |
176 | |
185 | |
177 | =head1 ENVIRONMENT VARIABLES |
186 | =head1 ENVIRONMENT VARIABLES |
178 | |
187 | |
179 | You can set the environment variable C<PERL_DEVEL_FINDREF_DEPTH> to an |
188 | You can set the environment variable C<PERL_DEVEL_FINDREF_DEPTH> to an |