SEGV in dwarf2read.c -- gdb-7.2

[Michael Eager]

On 11/03/2011 09:55 AM, Jan Kratochvil wrote:
> On Thu, 03 Nov 2011 17:43:20 +0100, Tom Tromey wrote:
>> Does the CU cache serve a useful purpose these days?
>
> You already need to pre-read all the CUs (=load_cu) before starting to parse
> them (=process_queue).  So some multi-CU storage needs to be there.  It is
> true the cache should be at least significantly larger
> (now dwarf2_max_cache_age == 5 generations) to have any effect, if it can have
> any effect.

With the addition of the call to age_cached_comp_units() in
dwarf2_fetch_die_location_block() and dw2_do_instantiate_symtab(),
I think that the cache is aged very aggressively.  With
dwarf2_max_cache_age == 5, it looks to me that it is likely that
CU data will not be in the cache when needed.

-- 
Michael Eager	 eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306  650-325-8077