Re: [RFA/mips] mips32 frame code simplification...

[Andrew Cagney <cagney@gnu.org>]

> Joel Brobecker writes:
> 
>>> I don't think that's the problem. I get an infinite loop inside GDB
>>> itself (backtracing from a signal handler I think), and that causes
>>> the expect/dejagnu buffer to get full.
> 
> 
> How about:
> 
>   set backtrace limit 1000
> 
> That would look good in default_gdb_start and mi_gdb_start.

Someone somewhere pointed out (with a patch) that
	set backtrace limit 1000
didn't actually work!  I've lost the patch but am working on a tested fix.

Now if only I could remember who posted the original patch.

Andrew

> However a backtrace limit of 1000 would still overflow the
> 20000-character buffer.  Also I've heard that "set backtrace limit"
> has a bug these days.
> 
> We could also change the individual "backtrace" and "bt" calls to
> "backtrace 100".  That's simpler and more effective, but it fixes
> just one nit at a time.
> 
> 
>>> And apparently, this just disables dejagnu for the rest of the run
>>> (can't spawn the compiler nor the debugger anymore for instance).
>>> Maybe there is a way of flushing that buffer when we do a gdb_exit?
> 
> 
> I don't know enough about expect to get into that area.  :(
>