[PATCH v2 5/6] gdb/infrun: in condition evaluation do not stop all threads.

[Natalia Saiapova <natalia.saiapova@intel.com>]

If a thread is evaluating a BP condition, do not stop other threads.
Some of them might be already resumed due to the condition being
evaluated as false.

gdb/ChangeLog:
2020-08-26  Natalia Saiapova  <natalia.saiapova@intel.com>
	    Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>

	* infrun.c (stop_waiting): In condition evaluation do not stop
	all threads.

Co-authored-by: Natalia Saiapova <natalia.saiapova@intel.com>
Co-authored-by: Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>

Signed-off-by: Natalia Saiapova <natalia.saiapova@intel.com>
---
 gdb/infrun.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/gdb/infrun.c b/gdb/infrun.c
index d260eb6e3a7..286af5abbe1 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -7764,9 +7764,15 @@ stop_waiting (struct execution_control_state *ecs)
   /* Let callers know we don't want to wait for the inferior anymore.  */
   ecs->wait_some_more = 0;
 
+  bool in_cond_eval = ecs->event_thread != nullptr
+    && ecs->event_thread->control.in_cond_eval;
+
   /* If all-stop, but there exists a non-stop target, stop all
-     threads now that we're presenting the stop to the user.  */
-  if (!non_stop && exists_non_stop_target ())
+     threads now that we're presenting the stop to the user.
+     Do not stop, if the event thread is evaluating a BP condition.
+     This will be handled elsewhere depending on the result of
+     the condition.  */
+  if (!non_stop && exists_non_stop_target () && !in_cond_eval)
     stop_all_threads ();
 }
 
-- 
2.17.1

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