This changes the event code in the Python layer to use
gdbpy_ref, simplifying the logic in many places.
It also changes evpy_emit_event not to steal a reference to its
argument. This is simpler to do now that gdbpy_ref is in use;
it's also a reasonable cleanup in its own right. While doing this I
realized that evpy_emit_event should not be calling gdbpy_print_stack
(all the outermost callers do this if needed), so I removed this as
well.
2017-01-10 Tom Tromey <tom@tromey.com>
* python/py-threadevent.c (create_thread_event_object): Use
gdbpy_ref.
* python/py-stopevent.c (create_stop_event_object): Simplify.
(emit_stop_event): Use gdbpy_ref.
* python/py-signalevent.c (create_signal_event_object): Use
gdbpy_ref.
* python/py-newobjfileevent.c (create_new_objfile_event_object)
(emit_new_objfile_event, create_clear_objfiles_event_object)
(emit_clear_objfiles_event): Use gdbpy_ref.
* python/py-infevents.c (create_inferior_call_event_object)
(create_register_changed_event_object)
(create_memory_changed_event_object, emit_inferior_call_event)
(emit_memory_changed_event, emit_register_changed_event): Use
gdbpy_ref.
* python/py-exitedevent.c (create_exited_event_object)
(emit_exited_event): Use gdbpy_ref.
* python/py-event.h (evpy_emit_event): Remove
CPYCHECKER_STEALS_REFERENCE_TO_ARG annotation.
* python/py-event.c (evpy_emit_event): Use gdbpy_ref.
* python/py-continueevent.c (emit_continue_event): Use
gdbpy_ref.
* python/py-breakpoint.c (gdbpy_breakpoint_created)
(gdbpy_breakpoint_deleted, gdbpy_breakpoint_modified): Use
gdbpy_ref.
* python/py-bpevent.c (create_breakpoint_event_object): Use
gdbpy_ref.
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