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[RFC 0/6] Fix lost siginfo_t
- From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
- To: gdb-patches at sourceware dot org
- Date: Tue, 27 Jul 2010 00:50:54 +0200
- Subject: [RFC 0/6] Fix lost siginfo_t
Hi,
currently GDB's postponing and resending signals across threads drops the
associated siginfo_t information. This can break real world inferiors
https://bugzilla.redhat.com/attachment.cgi?id=413842
and it is also tested by a new testcase.
IMO all current `int status', `int host_signal' and `enum target_signal'
should be associated with their siginfo_t as otherwise they carry incomplete
information. This is implemented by this patchset although it brings
sizeof (target_signal) to 136. It is currently passed by value everywhere, it
could be either just shortened to 48 bytes or some pointer / reference
counting could be implemented. It is true I would not change it myself
without a request as x86* host machines cannot notice such a small overhead.
There are some details to tune up but I would welcome to get some preliminary
approval of the approach before some more details + ChangeLogs get tuned up.
No regressions on {x86_64,x86_64-m32,i686}-fedora13-linux-gnu, with new KFAIL:
http://sourceware.org/bugzilla/show_bug.cgi?id=11842
Currently it has some runtime + compilation regressions on non-x86* arches.
Thanks,
Jan