resume from another engine results in loss of singlestep req.

[Roland McGrath]

> Btw. Roland, unless utrace_get_signal() does dequeue_signal(info),
> we pass a random value in info->si_signo to ->report_signal().
> Yes, _if_ I understand correctly, report_signal can check action,
> but perhaps it makes sense to set ->si_signo = 0, this may help to
> engine writers.

This is really another subject, and let's discuss that outside this thread
about single-step.  Please read the kerneldoc for @report_signal (utrace.h).

> For example, probe5_a and probe5_b just blindly check ->si_signo.

Srikar, also please read the kerneldoc for @report_signal (utrace.h). ;-)


Thanks,
Roland