Remove dead sets/clears of ecs->random signal.

'*ecs' is always memset by handle_inferior_event's callers, so all
these clears are unnecessary.  There's one place that sets the flag to
true, but, afterwards, before ecs->random_signal is ever read, we
reach the part of handle_inferior_even that clears ecs->random_signal,
among other things:

  clear_stop_func (ecs);
  ecs->event_thread->stepping_over_breakpoint = 0;
  bpstat_clear (&ecs->event_thread->control.stop_bpstat);
  ecs->event_thread->control.stop_step = 0;
  stop_print_frame = 1;
  ecs->random_signal = 0;
  stopped_by_random_signal = 0;

So all these ecs->random_signal accesses are dead code.

Tested on x86_64 Fedora 17.

gdb/
2013-10-22  Pedro Alves  <palves@redhat.com>

	* infrun.c (handle_inferior_event) <thread hop>: Don't clear or
	set ecs->random signal.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e4abc1c..d0854a8 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2013-10-22  Pedro Alves  <palves@redhat.com>
 
+       * infrun.c (handle_inferior_event) <thread hop>: Don't clear or
+       set ecs->random signal.
+
+2013-10-22  Pedro Alves  <palves@redhat.com>
+
        * infrun.c (keep_going): Update comments.
 
 2013-10-22  Pedro Alves  <palves@redhat.com>

diff --git a/gdb/infrun.c b/gdb/infrun.c
index b1d2dc5..c1cb99f 100644 (file)
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -3819,7 +3819,6 @@ Cannot fill $_exitsignal with the correct signal number.\n"));
          remove_single_step_breakpoints ();
          singlestep_breakpoints_inserted_p = 0;
 
-         ecs->random_signal = 0;
          ecs->event_thread->control.trap_expected = 0;
 
          context_switch (saved_singlestep_ptid);
@@ -3884,7 +3883,6 @@ Cannot fill $_exitsignal with the correct signal number.\n"));
          not see this breakpoint hit when stepping onto breakpoints.  */
       if (regular_breakpoint_inserted_here_p (aspace, stop_pc))
        {
-         ecs->random_signal = 0;
          if (!breakpoint_thread_match (aspace, stop_pc, ecs->ptid))
            thread_hop_needed = 1;
        }
@@ -3898,7 +3896,6 @@ Cannot fill $_exitsignal with the correct signal number.\n"));
                                "trap for %s\n",
                                target_pid_to_str (ecs->ptid));
 
-         ecs->random_signal = 0;
          /* The call to in_thread_list is necessary because PTIDs sometimes
             change when we go from single-threaded to multi-threaded.  If
             the singlestep_ptid is still in the list, assume that it is
@@ -4012,13 +4009,7 @@ Cannot fill $_exitsignal with the correct signal number.\n"));
              return;
            }
        }
-      else if (singlestep_breakpoints_inserted_p)
-       {
-         ecs->random_signal = 0;
-       }
     }
-  else
-    ecs->random_signal = 1;
 
   /* See if something interesting happened to the non-current thread.  If
      so, then switch to that thread.  */