[Bug malloc/16159] malloc_printerr() deadlock, when calling malloc_printerr() again

["neleai at seznam dot cz" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=16159

--- Comment #5 from Ondrej Bilka <neleai at seznam dot cz> ---
On Wed, Nov 13, 2013 at 03:57:02AM +0000, carlos at redhat dot com wrote:
> One resolution to this problem is to ensure that malloc has a fall-back
> allocation scheme that is robust against failure and then during the
> malloc_printerr we flip an internal bit and switch to the temporary reserve
> allocations. We could also create a new internal API for using the temporary
> allocations and then dlopen could use that in the event that we are crashing
> and need to dlopen one last library (the unwinder on demand). That would
> prevent other threads from consuming the reserve allocations after
> malloc_printerr is entered by another thread.
> 
> This is a considerable amount of work and we aren't going to get to this issue
> until a core developer or someone with serious interest commits to fixing this.
> Therefore I'm moving this to SUSPENDED until we find the resources to fix the
> issue.
> 
Why not reuse a singal-safe malloc for dlopen?

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