Random failures when calling free()/malloc()

[Andreas Jaeger]

Martin Schlemmer <azarah@gentoo.org> writes:

> On Sat, 2003-07-19 at 18:39, Dan Kegel wrote:
>> BTW, have you cranked glibc's malloc debugging setting
>> up to the max?  There's also a sanity check routine you
>> could call periodically before the failure...
>
> Ok, got this:
>
> --------------------------------------
> malloc.c:3212: munmap_chunk: Assertion `((p->prev_size + size) &
> (mp_.pagesize-1)) == 0' failed.
> --------------------------------------
>
> Pretty much the same as the rest, just ending in the assert and not
> the unlink().
>
> Any ideas will be appreciated.

Go back from this point in your program and check what you've done.
You're application has written beyond/before some area that you
allocated thereby destroying the internal malloc structure.  

This is really a bug in your application and nothing in glibc, so
let's close this discussion here on this list which is for glibc
development,

Andreas
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 Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
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