convert to_get_unwinder and to_get_tailcall_unwinder to methods

This converts to_get_unwinder and to_get_tailcall_unwinder to methods
and arranges for them to use the new delegation scheme.

This just lets us avoid having a differing style (neither new-style
nor INHERIT) of delegation in the tree.

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

	* target.c (target_get_unwinder): Rewrite.
	(target_get_tailcall_unwinder): Rewrite.
	* record-btrace.c (record_btrace_to_get_unwinder): New function.
	(record_btrace_to_get_tailcall_unwinder): New function.
	(init_record_btrace_ops): Update.
	* target.h (struct target_ops) <to_get_unwinder,
	to_get_tailcall_unwinder>: Now function pointers.  Use
	TARGET_DEFAULT_RETURN.

1 files changed, 32 insertions, 0 deletions

diff --git a/gdb/target-delegates.c b/gdb/target-delegates.c
index 04824f2..5b27b59 100644
--- a/gdb/target-delegates.c
+++ b/gdb/target-delegates.c
@@ -1572,6 +1572,32 @@ tdefault_augmented_libraries_svr4_read (struct target_ops *self)
   return 0;
 }
 
+static const struct frame_unwind *
+delegate_get_unwinder (struct target_ops *self)
+{
+  self = self->beneath;
+  return self->to_get_unwinder (self);
+}
+
+static const struct frame_unwind *
+tdefault_get_unwinder (struct target_ops *self)
+{
+  return NULL;
+}
+
+static const struct frame_unwind *
+delegate_get_tailcall_unwinder (struct target_ops *self)
+{
+  self = self->beneath;
+  return self->to_get_tailcall_unwinder (self);
+}
+
+static const struct frame_unwind *
+tdefault_get_tailcall_unwinder (struct target_ops *self)
+{
+  return NULL;
+}
+
 static CORE_ADDR
 delegate_decr_pc_after_break (struct target_ops *self, struct gdbarch *arg1)
 {
@@ -1844,6 +1870,10 @@ install_delegators (struct target_ops *ops)
     ops->to_call_history_range = delegate_call_history_range;
   if (ops->to_augmented_libraries_svr4_read == NULL)
     ops->to_augmented_libraries_svr4_read = delegate_augmented_libraries_svr4_read;
+  if (ops->to_get_unwinder == NULL)
+    ops->to_get_unwinder = delegate_get_unwinder;
+  if (ops->to_get_tailcall_unwinder == NULL)
+    ops->to_get_tailcall_unwinder = delegate_get_tailcall_unwinder;
   if (ops->to_decr_pc_after_break == NULL)
     ops->to_decr_pc_after_break = delegate_decr_pc_after_break;
 }
@@ -1982,5 +2012,7 @@ install_dummy_methods (struct target_ops *ops)
   ops->to_call_history_from = tdefault_call_history_from;
   ops->to_call_history_range = tdefault_call_history_range;
   ops->to_augmented_libraries_svr4_read = tdefault_augmented_libraries_svr4_read;
+  ops->to_get_unwinder = tdefault_get_unwinder;
+  ops->to_get_tailcall_unwinder = tdefault_get_tailcall_unwinder;
   ops->to_decr_pc_after_break = default_target_decr_pc_after_break;
 }