Re: GuardMalloc question
Re: GuardMalloc question
- Subject: Re: GuardMalloc question
- From: "Sean McBride" <email@hidden>
- Date: Thu, 14 Sep 2006 10:49:57 -0400
- Organization: Rogue Research
On 2006-09-14 16:25, Arthur C. said:
>I suspect that my program has either a memory leak, or a variable that gets
>released prematurely, or both...
>Now when I run GuardMalloc, after a while I get the following message:
>
> GuardMalloc[TestGraphs-4113]: free: magic is df7648e4, not deadbeef.
> GuardMalloc[TestGraphs-4113]: free: pointer probably not from
> heap, or header has been trashed.
> GuardMalloc[TestGraphs-4113]: Explicitly trapping into debugger!!!
>
>Does anyone know what this means? What is 'deadbeef', and what kind of
>'magic' is meant here?
0xDEADBEEF is everybody's favourite hex number. :)
How it related to guard malloc is explained in the man page:
<http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/
libgmalloc.3.html>
>And, more importantly, does this give me a clue about the program position
>where the error is?
Well, looks like you're trying to free something that was either
corrupted or never allocated in the first place.
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
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