Re: Fun with LD_PRELOAD

[Doug Evans <xdje42@gmail.com>]

Pedro Alves <palves@redhat.com> writes:
> (removed guile)
>
> As we're talking about it,
>
> On 02/05/2014 06:21 PM, Doug Evans wrote:
>
>> For example, a colleague at Google tripped over a bug that requires a
>> specific timing to replicate.  I don't have all the details at hand,
>> but I think I'm hitting the same assert.
>> 
>> infrun.c:1948: internal-error: resume: Assertion
>> `pc_in_thread_step_range (pc, tp)' failed.
>> 
>> AIUI, It happens, for example, when the user does a "next", and a
>> signal arrives on another thread while the thread being next'd has
>> stepped into a subroutine (thus requiring gdb to step out to implement
>> the semantics of "next").  I now have a simple repro (at least for the
>> assert I'm seeing), and it was very straightforward to write.  It
>> involves tracking the PTRACE_SINGLESTEP being issued to one thread
>> (that implement "next") and at the right time send a signal to another
>> thread.
>
> perhaps you could check whether the patch at
>
>   https://sourceware.org/ml/gdb-patches/2014-01/msg00910.html
>
> also fixes your reproducer?

Yes it does, thanks.