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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/29962] FAIL: gdb.reverse/step-reverse.exp: reverse step
 into fn call
Date: Wed, 04 Jan 2023 17:18:11 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29962

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
The decision to stop stepping happens here in this code in
process_event_stop_test:
...
     /* When stepping backward, stop at beginning of line range=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20
         (unless it's the function entry point, in which case=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
         keep going back to the call point).  */
      CORE_ADDR stop_pc =3D ecs->event_thread->stop_pc ();
      if (stop_pc =3D=3D ecs->event_thread->control.step_range_start
          && stop_pc !=3D ecs->stop_func_start
          && execution_direction =3D=3D EXEC_REVERSE)
        end_stepping_range (ecs);
      else
        keep_going (ecs);

      return;
    }

  /* We stepped out of the stepping range.  */
...

AFAICT, there just isn't enough information at this point to decide to stop
stepping.

This code is part of an early-out that tries to do:
...
 /* If stepping through a line, keep going if still within it.=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20
...

--=20
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