Re: [Mingw-users] malloc and random crashes

[David F. <dav...@ho...>]

Hi

Sorry for not replying for some time...well here's some code that crashes 
on my box...

Sincerely
David


At 20:13 2003-07-14 -0400, you wrote:
>Please provide examples.  It will help us to know what it is that isn't
>working.  Obviously, malloc is being used by others or we would have had
>to have done something about it years ago.
>
>Thanks,
>Earnie.
>
>Duncan Murdoch wrote:
> > On Mon, 14 Jul 2003 14:32:00 +0200, David Fredin
> > <dav...@ho...> wrote :
> >
> >
> >>Hi!
> >>
> >>My program keeps on crashing on mallocs. It's very strange. I have checked
> >>every single malloc if it's returning NULL, and ive checked the values I
> >>use when mallocing. I shouldn't run out of memory 'cause Im only doing
> >>stuff with quite small strings, which I've checked for \0's of course...
> >>
> >>Anyone have any clues or anything that might help???
> >
> >
> > By default, MinGW uses the msvcrt malloc.  You can probably cause it
> > to crash if you mix in calls to your own version of malloc, or if
> > something in your code is writing outside the blocks it allocates.
> >
> > I don't know the details of the msvcrt code, but most mallocs maintain
> > some sort of structure in unallocated memory to tell them where the
> > free blocks are.  If your malloc or your code is writing there, you'll
> > likely crash.
> >
> > Duncan Murdoch
> >
> >
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