Make to_traceframe_info return a unique_ptr

Since this target method returns an allocated object, return a
unique_ptr.  It allows getting rid a some cleanups here and there.

I had to shuffle the includes around.  First, target.h now needs to
include tracepoint.h, to get the definition of traceframe_info_up.
However, the definition of enum trace_find_type was later in target, so
I had to move it to tracepoint.h, so that the declaration of tfind_1
could know about it.  I then had to remove the include of target.h from
tracepoint.h, which caused a circular dependency (it was probably
included to get enum trace_find_type in the first place anyway).

Regression tested on the buildbot.

gdb/ChangeLog:

	* target.h: Include tracepoint.h.
	(enum trace_find_type): Move to tracepoint.h.
	(struct target_ops) <to_traceframe_info>: Return a unique ptr.
	* tracepoint.h: Don't include target.h
	(enum trace_find_type): Move from target.h.
	(parse_traceframe_info): Return a unique ptr.
	* tracepoint.c (current_traceframe_info): Change type to unique
	ptr.
	(free_traceframe_info): Remove.
	(clear_traceframe_info): Don't manually free
	current_traceframe_info.
	(free_result): Remove.
	(parse_traceframe_info): Return a unique ptr.
	(get_traceframe_info): Adjust to unique ptr.
	* ctf.c (ctf_traceframe_info): Return a unique ptr.
	* remote.c (remote_traceframe_info): Return a unique ptr.
	* tracefile-tfile.c (tfile_traceframe_info): Return a unique
	ptr.
	* target-debug.h (target_debug_print_traceframe_info_up): New
	macro.
	* target-delegates.c: Regenerate.

1 files changed, 4 insertions, 3 deletions

diff --git a/gdb/tracefile-tfile.c b/gdb/tracefile-tfile.c
index cc77b6c..727570c 100644
--- a/gdb/tracefile-tfile.c
+++ b/gdb/tracefile-tfile.c
@@ -1088,12 +1088,13 @@ build_traceframe_info (char blocktype, void *data)
   return 0;
 }
 
-static struct traceframe_info *
+static traceframe_info_up
 tfile_traceframe_info (struct target_ops *self)
 {
-  traceframe_info *info = new traceframe_info;
+  traceframe_info_up info (new traceframe_info);
+
+  traceframe_walk_blocks (build_traceframe_info, 0, info.get ());
 
-  traceframe_walk_blocks (build_traceframe_info, 0, info);
   return info;
 }