Wireshark · Wireshark-dev: Re: [Wireshark-dev] [Wireshark-commits] rev 36988: /trunk/ /trunk/epan/dissectors/: packet-iwarp-mpa

[Jeff Morriss <jeff.morriss.ws@xxxxxxxxx>]

Jakub Zawadzki wrote:
> On Wed, May 04, 2011 at 04:40:12PM -0600, Stephen Fisher wrote:
> > On Wed, May 04, 2011 at 09:19:08PM +0000, darkjames@xxxxxxxxxxxxx wrote:
> >
> > > Log:
> > >  XXX, should this code use g_try_malloc instead?
> > is that inside GTK+ and GLib, 
> > they still use g_malloc, so we can't totally eliminate the 
> > possibilty of Wireshark being aborted when out of memory.
>
> Hmm, we could set our own allocator (g_mem_set_vtable()),
> and THROW OutOfMemoryError (instead of aborting)
>
> for example vtab.malloc routine:
> #v+
> static gpointer
> ws_malloc(gsize n_bytes)
> {
>   gpointer ptr = malloc(n_bytes);
>   if (!ptr)
>     THROW(OutOfMemoryError);
>   return ptr;
> }
> #v-

Is it likely/possible that:
a) GTK (or glib) might acquire a lock before allocating something
b) (and) we might call another GTK function which requires the same lock

thus leading to a deadlock if we jump out of the allocation failure?