Leak(3) User Contributed Perl Documentation Leak(3)NAMEDevel::Leak - Utility for looking for perl objects that are not
reclaimed.
SYNOPSIS
use Devel::Leak;
... setup code
my $count = Devel::Leak::NoteSV($handle);
... code that may leak
Devel::Leak::CheckSV($handle);
DESCRIPTIONDevel::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.
HISTORY
This little utility module was part of Tk until the variable renaming
in perl5.005 made it clear that Tk had no business knowing this much
about the perl internals.
AUTHOR
Nick Ing-Simmons <nick@ni-s.u-net.com>
perl v5.14.0 2004-03-18 Leak(3)
