* glibc detected - free(): invalid next size
@ 2006-02-18 4:59 James Colannino
2006-02-18 10:14 ` Glynn Clements
0 siblings, 1 reply; 2+ messages in thread
From: James Colannino @ 2006-02-18 4:59 UTC (permalink / raw)
To: Linux C Programming List
Hey everyone. I have a quick question. What does the following runtime
error mean?
*** glibc detected *** free(): invalid next size (fast): 0x0804a1c0 ***
Does this mean that the program attempted to free memory from a pointer
that wasn't allocated any memory? I have a feeling that is what this
means, but the message itself is cryptic.
On a related note, does anyone know of a good source that describes
runtime errors such as this in detail? It would help me greatly in my
debugging experience. Thanks :)
James
--
My blog: http://www.crazydrclaw.com/
My homepage: http://james.colannino.org/
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: glibc detected - free(): invalid next size
2006-02-18 4:59 glibc detected - free(): invalid next size James Colannino
@ 2006-02-18 10:14 ` Glynn Clements
0 siblings, 0 replies; 2+ messages in thread
From: Glynn Clements @ 2006-02-18 10:14 UTC (permalink / raw)
To: James Colannino; +Cc: Linux C Programming List
James Colannino wrote:
> Hey everyone. I have a quick question. What does the following runtime
> error mean?
>
> *** glibc detected *** free(): invalid next size (fast): 0x0804a1c0 ***
>
> Does this mean that the program attempted to free memory from a pointer
> that wasn't allocated any memory? I have a feeling that is what this
> means, but the message itself is cryptic.
Either the pointer passed to free() was bogus (not returned from
malloc(), calloc() etc), or the heap is corrupt.
> On a related note, does anyone know of a good source that describes
> runtime errors such as this in detail? It would help me greatly in my
> debugging experience. Thanks :)
I don't know of any documentation for allocator warnings other than
the glibc source code itself.
--
Glynn Clements <glynn@gclements.plus.com>
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