[PATCH 3/6] gdbserver: Add debugging printf when setting last_resume_kind.

[Doug Evans <dje@google.com>]

Hi.

This patch adds a debugging printf to the setting of last_resume_kind
which I found useful while debugging 16168.

2013-12-17  Doug Evans  <dje@google.com>

	* linux-low.c (resume_kind_to_str): New function.
	(linux_set_resume_request): Add debugging printf when setting
	last_resume_kind.

---
 gdb/gdbserver/linux-low.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 464aaf0..3883e50 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -3301,6 +3301,24 @@ struct thread_resume_array
   size_t n;
 };
 
+/* Return the string name of KIND.  */
+
+static const char *
+resume_kind_to_str (enum resume_kind kind)
+{
+  switch (kind)
+    {
+    case resume_continue:
+      return "resume_continue";
+    case resume_step:
+      return "resume_step";
+    case resume_stop:
+      return "resume_stop";
+    default:
+      gdb_assert_not_reached ("bad resume_kind");
+    }
+}
+
 /* This function is called once per thread via find_inferior.
    ARG is a pointer to a thread_resume_array struct.
    We look up the thread specified by ENTRY in ARG, and mark the thread
@@ -3352,6 +3370,13 @@ linux_set_resume_request (struct inferior_list_entry *entry, void *arg)
 	  lwp->step_range_start = lwp->resume->step_range_start;
 	  lwp->step_range_end = lwp->resume->step_range_end;
 
+	  if (debug_threads)
+	    {
+	      fprintf (stderr, "setting last_resume_kind of LWP %ld to %s\n",
+		       lwpid_of (lwp),
+		       resume_kind_to_str (thread->last_resume_kind));
+	    }
+
 	  /* If we had a deferred signal to report, dequeue one now.
 	     This can happen if LWP gets more than one signal while
 	     trying to get out of a jump pad.  */
-- 
1.8.5.1