Devel::Leak(3pm)

Usage

  use Devel::Leak;
  ... setup code
  my $count = Devel::Leak::NoteSV($handle);
  ... code that may leak
  Devel::Leak::CheckSV($handle);

Overview

Devel::Leak has two functions "NoteSV" and "CheckSV".

"NoteSV" walks the perl internal table of allocated SVs (scalar values) - (which actually contains arrays and hashes too), and records their addresses in a table. It returns a count of these "things", and stores a pointer to the table (which is obtained from the heap using malloc()) in its argument.

"CheckSV" is passed argument which holds a pointer to a table created by "NoteSV". It re-walks the perl-internals and calls sv_dump() for any "things" which did not exist when "NoteSV" was called. It returns a count of the number of "things" now allocated.

Caveats

Note that you need a perl built with -DDEBUGGING for sv_dump() to print anything, but counts are valid in any perl.

If new "things" have been created, "CheckSV" may (also) report additional "things" which are allocated by the sv_dump() code.

Releases

10 releases since Debian 5.0 (Lenny); the text changed 8 times.

5.0–6.0
7
8
9
10
11
12
13
Arch