convert to_supports_string_tracing

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

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

4 files changed, 27 insertions, 5 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 13f4a7d..e2a0e58 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_supports_string_tracing.
+	* target.h (struct target_ops) <to_supports_string_tracing>: 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_supports_enable_disable_tracepoint.
 	* target.h (struct target_ops)
 	<to_supports_enable_disable_tracepoint>: Use
diff --git a/gdb/target-delegates.c b/gdb/target-delegates.c
index 30bea1c..275ce58 100644
--- a/gdb/target-delegates.c
+++ b/gdb/target-delegates.c
@@ -617,6 +617,19 @@ tdefault_supports_enable_disable_tracepoint (struct target_ops *self)
   return 0;
 }
 
+static int
+delegate_supports_string_tracing (struct target_ops *self)
+{
+  self = self->beneath;
+  return self->to_supports_string_tracing (self);
+}
+
+static int
+tdefault_supports_string_tracing (struct target_ops *self)
+{
+  return 0;
+}
+
 static struct gdbarch *
 delegate_thread_architecture (struct target_ops *self, ptid_t arg1)
 {
@@ -748,6 +761,8 @@ install_delegators (struct target_ops *ops)
     ops->to_supports_multi_process = delegate_supports_multi_process;
   if (ops->to_supports_enable_disable_tracepoint == NULL)
     ops->to_supports_enable_disable_tracepoint = delegate_supports_enable_disable_tracepoint;
+  if (ops->to_supports_string_tracing == NULL)
+    ops->to_supports_string_tracing = delegate_supports_string_tracing;
   if (ops->to_thread_architecture == NULL)
     ops->to_thread_architecture = delegate_thread_architecture;
   if (ops->to_supports_btrace == NULL)
@@ -811,6 +826,7 @@ install_dummy_methods (struct target_ops *ops)
   ops->to_execution_direction = default_execution_direction;
   ops->to_supports_multi_process = tdefault_supports_multi_process;
   ops->to_supports_enable_disable_tracepoint = tdefault_supports_enable_disable_tracepoint;
+  ops->to_supports_string_tracing = tdefault_supports_string_tracing;
   ops->to_thread_architecture = default_thread_architecture;
   ops->to_supports_btrace = tdefault_supports_btrace;
 }
diff --git a/gdb/target.c b/gdb/target.c
index 7d96806..c9e2ba5 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -687,7 +687,7 @@ update_current_target (void)
       /* Do not inherit to_search_memory.  */
       /* Do not inherit to_supports_multi_process.  */
       /* Do not inherit to_supports_enable_disable_tracepoint.  */
-      INHERIT (to_supports_string_tracing, t);
+      /* Do not inherit to_supports_string_tracing.  */
       INHERIT (to_trace_init, t);
       INHERIT (to_download_tracepoint, t);
       INHERIT (to_can_download_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_supports_string_tracing,
-	    (int (*) (struct target_ops *))
-	    return_zero);
   de_fault (to_trace_init,
 	    (void (*) (struct target_ops *))
 	    tcomplain);
diff --git a/gdb/target.h b/gdb/target.h
index 5fb7def..db31b5e 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -725,7 +725,8 @@ struct target_ops
     int (*to_supports_disable_randomization) (struct target_ops *);
 
     /* Does this target support the tracenz bytecode for string collection?  */
-    int (*to_supports_string_tracing) (struct target_ops *);
+    int (*to_supports_string_tracing) (struct target_ops *)
+      TARGET_DEFAULT_RETURN (0);
 
     /* Does this target support evaluation of breakpoint conditions on its
        end?  */