[PATCH] btrace: initiate teardown when closing record btrace target

[Markus Metzger <markus dot t dot metzger at intel dot com>]

The to_teardown_btrace target method is used to free btrace resources
during shutdown when target record has already been unpushed and we
can't reliably talk to a remote target to disable branch tracing.

Tracing resources are freed for each thread when the thread is removed;
both on the GDB side and on the gdbserver side.

In the remote case, the remote target that provides to_teardown_btrace
to free the GDB side resources has already been unpushed when threads
are destroyed.  This results in a complaint "You can't do this ..." and
in a few bytes of memory leaked for each thread.

Initiate btrace teardown in record_btrace_close, so the remote target is
still in place.

2014-01-20  Markus Metzger  <markus.t.metzger@intel.com>

	* record-btrace.c (record_btrace_close): Call btrace_teardown
	for all threads.
---
 gdb/record-btrace.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index 3a93fdb..365b6be 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -213,11 +213,16 @@ record_btrace_stop_recording (void)
 static void
 record_btrace_close (void)
 {
+  struct thread_info *tp;
+
   /* Make sure automatic recording gets disabled even if we did not stop
      recording before closing the record-btrace target.  */
   record_btrace_auto_disable ();
 
-  /* We already stopped recording.  */
+  /* We should have already stopped recording.
+     Tear down btrace in case we have not.  */
+  ALL_THREADS (tp)
+    btrace_teardown (tp);
 }
 
 /* The to_info_record method of target record-btrace.  */
-- 
1.8.3.1