[RFA 4/5] Remove two infrun cleanups

[Tom Tromey <tom@tromey.com>]

This removes a couple of cleanups from infrun by introducing a couple
of unique_ptr specializations.

gdb/ChangeLog
2018-07-11  Tom Tromey  <tom@tromey.com>

	* inferior.h (struct infcall_suspend_state_deleter): New.
	(infcall_suspend_state_up): New typedef.
	(struct infcall_control_state_deleter): New.
	(infcall_control_state_up): New typedef.
	(make_cleanup_restore_infcall_suspend_state)
	(make_cleanup_restore_infcall_control_state): Don't declare.
	* infcall.c (call_function_by_hand_dummy): Update.
	* infrun.c (do_restore_infcall_suspend_state_cleanup)
	(make_cleanup_restore_infcall_suspend_state): Remove.
	(do_restore_infcall_control_state_cleanup)
	(make_cleanup_restore_infcall_control_state): Remove.
---
 gdb/ChangeLog  | 14 ++++++++++++++
 gdb/infcall.c  | 39 ++++++++++++++-------------------------
 gdb/inferior.h | 31 +++++++++++++++++++++++++++----
 gdb/infrun.c   | 26 --------------------------
 4 files changed, 55 insertions(+), 55 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 95d4f51f62c..12e27000151 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,17 @@
+2018-07-11  Tom Tromey  <tom@tromey.com>
+
+	* inferior.h (struct infcall_suspend_state_deleter): New.
+	(infcall_suspend_state_up): New typedef.
+	(struct infcall_control_state_deleter): New.
+	(infcall_control_state_up): New typedef.
+	(make_cleanup_restore_infcall_suspend_state)
+	(make_cleanup_restore_infcall_control_state): Don't declare.
+	* infcall.c (call_function_by_hand_dummy): Update.
+	* infrun.c (do_restore_infcall_suspend_state_cleanup)
+	(make_cleanup_restore_infcall_suspend_state): Remove.
+	(do_restore_infcall_control_state_cleanup)
+	(make_cleanup_restore_infcall_control_state): Remove.
+
 2018-07-11  Tom Tromey  <tom@tromey.com>
 
 	* infrun.c (struct infcall_control_state): Add initializers.
diff --git a/gdb/infcall.c b/gdb/infcall.c
index 172c26ac820..b7071a722f1 100644
--- a/gdb/infcall.c
+++ b/gdb/infcall.c
@@ -724,9 +724,6 @@ call_function_by_hand_dummy (struct value *function,
   struct type *target_values_type;
   unsigned char struct_return = 0, hidden_first_param_p = 0;
   CORE_ADDR struct_addr = 0;
-  struct infcall_control_state *inf_status;
-  struct cleanup *inf_status_cleanup;
-  struct infcall_suspend_state *caller_state;
   CORE_ADDR real_pc;
   CORE_ADDR bp_addr;
   struct frame_id dummy_id;
@@ -760,19 +757,16 @@ call_function_by_hand_dummy (struct value *function,
   if (!gdbarch_push_dummy_call_p (gdbarch))
     error (_("This target does not support function calls."));
 
-  /* A cleanup for the inferior status.
+  /* A holder for the inferior status.
      This is only needed while we're preparing the inferior function call.  */
-  inf_status = save_infcall_control_state ();
-  inf_status_cleanup
-    = make_cleanup_restore_infcall_control_state (inf_status);
+  infcall_control_state_up inf_status (save_infcall_control_state ());
 
   /* Save the caller's registers and other state associated with the
      inferior itself so that they can be restored once the
      callee returns.  To allow nested calls the registers are (further
-     down) pushed onto a dummy frame stack.  Include a cleanup (which
-     is tossed once the regcache has been pushed).  */
-  caller_state = save_infcall_suspend_state ();
-  make_cleanup_restore_infcall_suspend_state (caller_state);
+     down) pushed onto a dummy frame stack.  This unique pointer
+     is released once the regcache has been pushed).  */
+  infcall_suspend_state_up caller_state (save_infcall_suspend_state ());
 
   /* Ensure that the initial SP is correctly aligned.  */
   {
@@ -1133,15 +1127,10 @@ call_function_by_hand_dummy (struct value *function,
   if (unwind_on_terminating_exception_p)
     set_std_terminate_breakpoint ();
 
-  /* Discard both inf_status and caller_state cleanups.
-     From this point on we explicitly restore the associated state
-     or discard it.  */
-  discard_cleanups (inf_status_cleanup);
-
   /* Everything's ready, push all the info needed to restore the
      caller (and identify the dummy-frame) onto the dummy-frame
      stack.  */
-  dummy_frame_push (caller_state, &dummy_id, call_thread.get ());
+  dummy_frame_push (caller_state.release (), &dummy_id, call_thread.get ());
   if (dummy_dtor != NULL)
     register_dummy_frame_dtor (dummy_id, call_thread.get (),
 			       dummy_dtor, dummy_dtor_data);
@@ -1196,7 +1185,7 @@ call_function_by_hand_dummy (struct value *function,
 	       suspend state, and restore the inferior control
 	       state.  */
 	    dummy_frame_pop (dummy_id, call_thread.get ());
-	    restore_infcall_control_state (inf_status);
+	    restore_infcall_control_state (inf_status.release ());
 
 	    /* Get the return value.  */
 	    retval = sm->return_value;
@@ -1227,7 +1216,7 @@ call_function_by_hand_dummy (struct value *function,
       const char *name = get_function_name (funaddr,
                                             name_buf, sizeof (name_buf));
 
-      discard_infcall_control_state (inf_status);
+      discard_infcall_control_state (inf_status.release ());
 
       /* We could discard the dummy frame here if the program exited,
          but it will get garbage collected the next time the program is
@@ -1258,7 +1247,7 @@ When the function is done executing, GDB will silently stop."),
 
       /* If we try to restore the inferior status,
 	 we'll crash as the inferior is no longer running.  */
-      discard_infcall_control_state (inf_status);
+      discard_infcall_control_state (inf_status.release ());
 
       /* We could discard the dummy frame here given that the program exited,
          but it will get garbage collected the next time the program is
@@ -1280,7 +1269,7 @@ When the function is done executing, GDB will silently stop."),
 	 signal or breakpoint while our thread was running.
 	 There's no point in restoring the inferior status,
 	 we're in a different thread.  */
-      discard_infcall_control_state (inf_status);
+      discard_infcall_control_state (inf_status.release ());
       /* Keep the dummy frame record, if the user switches back to the
 	 thread with the hand-call, we'll need it.  */
       if (stopped_by_random_signal)
@@ -1321,7 +1310,7 @@ When the function is done executing, GDB will silently stop."),
 
 	      /* We also need to restore inferior status to that before the
 		 dummy call.  */
-	      restore_infcall_control_state (inf_status);
+	      restore_infcall_control_state (inf_status.release ());
 
 	      /* FIXME: Insert a bunch of wrap_here; name can be very
 		 long if it's a C++ name with arguments and stuff.  */
@@ -1339,7 +1328,7 @@ Evaluation of the expression containing the function\n\
 		 (default).
 		 Discard inferior status, we're not at the same point
 		 we started at.  */
-	      discard_infcall_control_state (inf_status);
+	      discard_infcall_control_state (inf_status.release ());
 
 	      /* FIXME: Insert a bunch of wrap_here; name can be very
 		 long if it's a C++ name with arguments and stuff.  */
@@ -1362,7 +1351,7 @@ When the function is done executing, GDB will silently stop."),
 
 	  /* We also need to restore inferior status to that before
 	     the dummy call.  */
-	  restore_infcall_control_state (inf_status);
+	  restore_infcall_control_state (inf_status.release ());
 
 	  error (_("\
 The program being debugged entered a std::terminate call, most likely\n\
@@ -1381,7 +1370,7 @@ will be abandoned."),
 	     Keep the dummy frame, the user may want to examine its state.
 	     Discard inferior status, we're not at the same point
 	     we started at.  */
-	  discard_infcall_control_state (inf_status);
+	  discard_infcall_control_state (inf_status.release ());
 
 	  /* The following error message used to say "The expression
 	     which contained the function call has been discarded."
diff --git a/gdb/inferior.h b/gdb/inferior.h
index c5dc324fa39..5591382079f 100644
--- a/gdb/inferior.h
+++ b/gdb/inferior.h
@@ -63,10 +63,33 @@ extern struct infcall_control_state *save_infcall_control_state (void);
 extern void restore_infcall_suspend_state (struct infcall_suspend_state *);
 extern void restore_infcall_control_state (struct infcall_control_state *);
 
-extern struct cleanup *make_cleanup_restore_infcall_suspend_state
-					    (struct infcall_suspend_state *);
-extern struct cleanup *make_cleanup_restore_infcall_control_state
-					    (struct infcall_control_state *);
+/* A deleter for infcall_suspend_state that calls
+   restore_infcall_suspend_state.  */
+struct infcall_suspend_state_deleter
+{
+  void operator() (struct infcall_suspend_state *state) const
+  {
+    restore_infcall_suspend_state (state);
+  }
+};
+
+/* A unique_ptr specialization for infcall_suspend_state.  */
+typedef std::unique_ptr<infcall_suspend_state, infcall_suspend_state_deleter>
+    infcall_suspend_state_up;
+
+/* A deleter for infcall_control_state that calls
+   restore_infcall_control_state.  */
+struct infcall_control_state_deleter
+{
+  void operator() (struct infcall_control_state *state) const
+  {
+    restore_infcall_control_state (state);
+  }
+};
+
+/* A unique_ptr specialization for infcall_control_state.  */
+typedef std::unique_ptr<infcall_control_state, infcall_control_state_deleter>
+    infcall_control_state_up;
 
 extern void discard_infcall_suspend_state (struct infcall_suspend_state *);
 extern void discard_infcall_control_state (struct infcall_control_state *);
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 3bc8dc03830..98b79e8c5ae 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -8896,19 +8896,6 @@ restore_infcall_suspend_state (struct infcall_suspend_state *inf_state)
   discard_infcall_suspend_state (inf_state);
 }
 
-static void
-do_restore_infcall_suspend_state_cleanup (void *state)
-{
-  restore_infcall_suspend_state ((struct infcall_suspend_state *) state);
-}
-
-struct cleanup *
-make_cleanup_restore_infcall_suspend_state
-  (struct infcall_suspend_state *inf_state)
-{
-  return make_cleanup (do_restore_infcall_suspend_state_cleanup, inf_state);
-}
-
 void
 discard_infcall_suspend_state (struct infcall_suspend_state *inf_state)
 {
@@ -9033,19 +9020,6 @@ restore_infcall_control_state (struct infcall_control_state *inf_status)
   delete inf_status;
 }
 
-static void
-do_restore_infcall_control_state_cleanup (void *sts)
-{
-  restore_infcall_control_state ((struct infcall_control_state *) sts);
-}
-
-struct cleanup *
-make_cleanup_restore_infcall_control_state
-  (struct infcall_control_state *inf_status)
-{
-  return make_cleanup (do_restore_infcall_control_state_cleanup, inf_status);
-}
-
 void
 discard_infcall_control_state (struct infcall_control_state *inf_status)
 {
-- 
2.17.1