Re: [PATCH] gdb: Fix missing first breakpoint in schedule-multiple mode

[Simon Marchi <simark@simark.ca>]

On 2022-07-25 12:22, Ciaran Woodward wrote:
> Rationale/background:
> When using schedule-multiple (sched_multi) in gdb, all inferiors
> are set to continue when the c command is used. However, before
> this patch, only the 'current' inferior would have its
> control->stop_soon field cleared. This field causes certain stops
> to be ignored, and is only intended for initial attach.
> 
> By not clearing this field before continue, continuing with inferior 2
> in focus and with inferior 1 hitting the next breakpoint, would cause
> gdb to ignore the breakpoint and any attempt to stop the target with
> Ctrl-C following that - even though the target was already stopped.
> The only fix was to quit GDB and restart.
> 
> Solution:
> With this patch, all inferiors being resumed have their
> control->stop_soon fields cleared, so gdb does not ignore the
> breakpoints of any inferior inadvertently.

Hi Ciaran,

Can you please provide some reproducing steps?  Some simple test
programs along with the sequence of GDB commands to use.  This way,
we'll be sure we look at the same problem.

Simon