[PATCH v2 1/2] Refactor sigcontextinfo.h

[Florian Weimer]

* Adhemerval Zanella:

> On 15/08/2019 11:36, Florian Weimer wrote:
>> * Adhemerval Zanella:
>> 
>>> On 15/08/2019 10:53, Florian Weimer wrote:
>>>> * Adhemerval Zanella:
>>>>
>>>>>> So I strongly urge you to add a test like the one below.  I can commit
>>>>>> it separately after your patch.  I still need to verify that it builds
>>>>>> on all architectures.
>>>>>
>>>>> I will integrate your tests if you are ok with that, however it requires some
>>>>> changes.
>>>>
>>>> Thanks.  What kind of changes?
>>>>
>>>> SA_SIGINFO is missing from sa_flags.  I've already fixed that.
>>>>
>>>>> I will double check it on some different architectures also.
>>>>
>>>> It works on aarch64, i386, x86-64, s390, s390x, ppc64le.  I planned to
>>>> test ppc and ppc64 as well, but could not get a Beaker machine yet.
>>>
>>> I can check on alpha, hppa, sh4, arm, m68k, sparc, and ia64. Both ia64 and
>>> sparc does not pass a ucontext_t as third argument, so these are the ones
>>> I would like to double-check.
>> 
>> Sounds good.  The tests (with the SA_SIGINFO fix applied) builds
>> everywhere using build-many-glibcs.py.
>
> The check call backtrace with in a signal handle, so it needs to be
> built with -fasynchronous-unwind-tables (testing on sparc showed that
> without this option it can't get a full stacktrace, I think some ABIs
> have the same issue).

Oh, right.  Wouldn't raise.c have to be compiled in this way?

(We should really build all of glibc with asynchronous unwind tables.)

Thanks,
Florian