convert to_can_download_tracepoint

2014-02-19  Tom Tromey  <tromey@redhat.com>

	* target-delegates.c: Rebuild.
	* target.c (update_current_target): Don't inherit or default
	to_can_download_tracepoint.
	* target.h (struct target_ops) <to_can_download_tracepoint>: Use
	TARGET_DEFAULT_RETURN.

4 files changed, 27 insertions, 5 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 51df9f9..4a5c9ea 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -2,6 +2,14 @@
 
 	* target-delegates.c: Rebuild.
 	* target.c (update_current_target): Don't inherit or default
+	to_can_download_tracepoint.
+	* target.h (struct target_ops) <to_can_download_tracepoint>: Use
+	TARGET_DEFAULT_RETURN.
+
+2014-02-19  Tom Tromey  <tromey@redhat.com>
+
+	* target-delegates.c: Rebuild.
+	* target.c (update_current_target): Don't inherit or default
 	to_download_tracepoint.
 	* target.h (struct target_ops) <to_download_tracepoint>: Use
 	TARGET_DEFAULT_NORETURN.
diff --git a/gdb/target-delegates.c b/gdb/target-delegates.c
index 560a099..2e0fddb 100644
--- a/gdb/target-delegates.c
+++ b/gdb/target-delegates.c
@@ -664,6 +664,19 @@ tdefault_download_tracepoint (struct target_ops *self, struct bp_location *arg1)
 }
 
 static int
+delegate_can_download_tracepoint (struct target_ops *self)
+{
+  self = self->beneath;
+  return self->to_can_download_tracepoint (self);
+}
+
+static int
+tdefault_can_download_tracepoint (struct target_ops *self)
+{
+  return 0;
+}
+
+static int
 delegate_supports_btrace (struct target_ops *self)
 {
   self = self->beneath;
@@ -795,6 +808,8 @@ install_delegators (struct target_ops *ops)
     ops->to_trace_init = delegate_trace_init;
   if (ops->to_download_tracepoint == NULL)
     ops->to_download_tracepoint = delegate_download_tracepoint;
+  if (ops->to_can_download_tracepoint == NULL)
+    ops->to_can_download_tracepoint = delegate_can_download_tracepoint;
   if (ops->to_supports_btrace == NULL)
     ops->to_supports_btrace = delegate_supports_btrace;
 }
@@ -860,5 +875,6 @@ install_dummy_methods (struct target_ops *ops)
   ops->to_thread_architecture = default_thread_architecture;
   ops->to_trace_init = tdefault_trace_init;
   ops->to_download_tracepoint = tdefault_download_tracepoint;
+  ops->to_can_download_tracepoint = tdefault_can_download_tracepoint;
   ops->to_supports_btrace = tdefault_supports_btrace;
 }
diff --git a/gdb/target.c b/gdb/target.c
index 1865e69..ce81c7c 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -690,7 +690,7 @@ update_current_target (void)
       /* Do not inherit to_supports_string_tracing.  */
       /* Do not inherit to_trace_init.  */
       /* Do not inherit to_download_tracepoint.  */
-      INHERIT (to_can_download_tracepoint, t);
+      /* Do not inherit to_can_download_tracepoint.  */
       INHERIT (to_download_trace_state_variable, t);
       INHERIT (to_enable_tracepoint, t);
       INHERIT (to_disable_tracepoint, t);
@@ -752,9 +752,6 @@ update_current_target (void)
 	    (void (*) (struct target_ops *, ptid_t))
 	    target_ignore);
   current_target.to_read_description = NULL;
-  de_fault (to_can_download_tracepoint,
-	    (int (*) (struct target_ops *))
-	    return_zero);
   de_fault (to_download_trace_state_variable,
 	    (void (*) (struct target_ops *, struct trace_state_variable *))
 	    tcomplain);
diff --git a/gdb/target.h b/gdb/target.h
index 3cfdfab..f0b46e4 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -811,7 +811,8 @@ struct target_ops
 
     /* Is the target able to download tracepoint locations in current
        state?  */
-    int (*to_can_download_tracepoint) (struct target_ops *);
+    int (*to_can_download_tracepoint) (struct target_ops *)
+      TARGET_DEFAULT_RETURN (0);
 
     /* Send full details of a trace state variable to the target.  */
     void (*to_download_trace_state_variable) (struct target_ops *,