1Devel::Gladiator(3)   User Contributed Perl Documentation  Devel::Gladiator(3)
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NAME

6       Devel::Gladiator - Walk Perl's arena
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VERSION

9       version 0.07
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SYNOPSIS

12         use Devel::Gladiator qw(walk_arena arena_ref_counts arena_table);
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14         my $all = walk_arena();
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16         foreach my $sv ( @$all ) {
17             warn "live object: $sv\n";
18         }
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20         warn arena_table(); # prints counts keyed by class
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22         # how to spot new entries in the arena after running some code
23         my %dump1 = map { ("$_" => $_) } walk_arena();
24         # do something
25         my %dump2 = map { $dump1{$_} ? () : ("$_" => $_) } walk_arena();
26         use Devel::Peek; Dump \%dump2;
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DESCRIPTION

29       Devel::Gladiator iterates Perl's internal memory structures and can be
30       used to enumerate all the currently live SVs.
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32       This can be used to hunt leaks and to profile memory usage.
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EXPORTS

35   walk_arena
36       Returns an array reference containing all the live SVs. Note that this
37       will include a reference back to itself, so you should manually clear
38       this array (via "@$arena = ()") when you are done with it, if you don't
39       want to create a memory leak.
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41   arena_ref_counts
42       Returns a hash keyed by class and reftype of all the live SVs.
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44       This is a convenient way to find out how many objects of a given class
45       exist at a certain point.
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47   arena_table
48       Formats a string table based on "arena_ref_counts" suitable for
49       printing.
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LIMITATIONS

52       This code may not work on perls 5.6.x and 5.8.x if PadWalker is
53       installed.  (Patches gratefully accepted!)
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SEE ALSO

56           Become a hero plumber <http://blog.woobling.org/2009/05/become-
57           hero-plumber.html> Test::Memory::Cycle Devel::Cycle Devel::Refcount
58           Devel::Leak Data::Structure::Util
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AUTHOR

61       Artur Bergman <sky@apple.com>
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64       This software is copyright (c) 2006 by Artur Bergman.
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66       This is free software; you can redistribute it and/or modify it under
67       the same terms as the Perl 5 programming language system itself.
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CONTRIBUTORS

70       ·   Karen Etheridge <ether@cpan.org>
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72       ·   יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
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74       ·   Jesse Luehrs <doy@tozt.net>
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76       ·   Brad Fitzpatrick <brad@danga.com>
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78       ·   Ed J <mohawk2@users.noreply.github.com>
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80       ·   Curtis Brandt <curtisjbrandt@gmail.com>
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84perl v5.30.0                      2019-07-26               Devel::Gladiator(3)
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