[PATCH 8/8] RSP notification 'Test'.

[Yao Qi <yao at codesourcery dot com>]

This patch is only to present how do we add a new type of notifcation
in the future, and to test two types of notifications coexist together
for testing purpose.  In each time GDB fetches registers, a new event
is pushed, and GDBserver will send a notification %Test to GDB.

This patch is not for committing to CVS trunk.

gdb/gdbserver:

2012-12-11  Yao Qi  <yao@codesourcery.com>

   	* linux-low.c: Include "notif.h".
	(linux_fetch_registers): Call notif_push.
	* notif.c (notif_reply_test): New.
	(notif_test): New variable.
	(notifs): Add new element 'notif_test'.
	notif.h (notif_test) Declaration.

gdb:

2012-12-11  Yao Qi  <yao@codesourcery.com>

	* remote-notif.c (remote_notif_parse_test): New.
	(remote_notif_test_ack): New.
	(remote_notif_test_alloc_event): New.
	(notif_client_test): New variable.
	(notifs): New element 'notif_client_test'.
---
 gdb/gdbserver/linux-low.c |   10 ++++++++++
 gdb/gdbserver/notif.c     |   12 ++++++++++++
 gdb/gdbserver/notif.h     |    2 ++
 gdb/remote-notif.c        |   43 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 67 insertions(+), 0 deletions(-)

diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index c697f6b..ef4b3a9 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -20,6 +20,7 @@
 #include "linux-low.h"
 #include "linux-osdata.h"
 #include "agent.h"
+#include "notif.h"
 
 #include "gdb_wait.h"
 #include <stdio.h>
@@ -4336,6 +4337,15 @@ linux_fetch_registers (struct regcache *regcache, int regno)
   int use_regsets;
   int all = 0;
 
+  /* Only for test.  */
+  if (notif_test.queue != NULL)
+    {
+      struct notif_event *new_event
+	= xmalloc (sizeof (struct notif_event));
+
+      notif_push (&notif_test, new_event);
+    }
+
   if (regno == -1)
     {
       if (the_low_target.fetch_register != NULL)
diff --git a/gdb/gdbserver/notif.c b/gdb/gdbserver/notif.c
index 0713b36..f9d4110 100644
--- a/gdb/gdbserver/notif.c
+++ b/gdb/gdbserver/notif.c
@@ -50,9 +50,21 @@
 
 #include "notif.h"
 
+static void
+notif_reply_test (struct notif_event *event, char *own_buf)
+{
+  strcpy (own_buf, "CESHI");
+}
+
+struct notif_server notif_test =
+{
+  "vTested", "Test", NULL, notif_reply_test
+};
+
 static struct notif_server *notifs[] =
 {
   &notif_stop,
+  &notif_test,
 };
 
 /* Write another event or an OK, if there are no more left, to
diff --git a/gdb/gdbserver/notif.h b/gdb/gdbserver/notif.h
index e153b48..4223c0c 100644
--- a/gdb/gdbserver/notif.h
+++ b/gdb/gdbserver/notif.h
@@ -63,4 +63,6 @@ void notif_push (struct notif_server *np, struct notif_event *event);
 void notif_event_enque (struct notif_server *notif,
 			struct notif_event *event);
 
+extern struct notif_server notif_test;
+
 void initialize_notif (void);
diff --git a/gdb/remote-notif.c b/gdb/remote-notif.c
index c02394a..916e297 100644
--- a/gdb/remote-notif.c
+++ b/gdb/remote-notif.c
@@ -44,11 +44,54 @@
 
 unsigned int notif_debug = 0;
 
+static void
+remote_notif_test_parse (struct notif_client *self, char *buf,
+			 struct notif_event *event)
+{
+  if (strncmp (buf, "CESHI", 5) != 0)
+    error (_("'CESHI' is expected"));
+}
+
+static void
+remote_notif_test_ack (struct notif_client *self, char *buf,
+		       struct notif_event *event)
+{
+  /* acknowledge */
+  putpkt ((char *) self->ack_command);
+}
+
+static int
+remote_notif_test_can_get_pending_events (struct notif_client *self)
+{
+  return 1;
+}
+
+static struct notif_event *
+remote_notif_test_alloc_event (void)
+{
+  struct notif_event *event = xmalloc (sizeof (struct notif_event));
+
+  event->dtr = NULL;
+
+  return event;
+}
+
+static struct notif_client notif_client_test =
+{
+  "Test", "vTested",
+  remote_notif_test_parse,
+  remote_notif_test_ack,
+  remote_notif_test_can_get_pending_events,
+  remote_notif_test_alloc_event,
+  NULL,
+};
+
 /* Supported clients of notifications.  */
 
 static struct notif_client *notifs[] =
 {
   &notif_client_stop,
+  &notif_client_test,
 };
 
 static void do_notif_event_xfree (void *arg);
-- 
1.7.7.6