Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??

Since Perl still uses a reference count based garbage collector, creating memory leaks is quite easy. You just need to construct something with a reference count above 0 for all elements :

use strict; my @a; a[0] = \a;

In this (contrived) case, the reference count of a can't sink below 1, since a itself holds a reference to a.

Of course, in this trivial example, it's easy to find the memory leak, but if you have a single linked list, it's easy to create a circular structure that will never be reaped.

One way to overcome this would be to use another style of garbage collection, like a mark-and-sweep collector, that starts with a single "good" pointer, and recursively traces all memory reachable from there, and deallocates all memory unreachable from there. This obviously will create some interesting situations for when destructors will be called, but that's another story then ;-)

In reply to Re: Re: Looking for Leaks by Corion
in thread Looking for Leaks by MeowChow

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others perusing the Monastery: (7)
As of 2024-04-22 22:05 GMT
Find Nodes?
    Voting Booth?

    No recent polls found