[PULL 05/24] ui: add some vdagent related traces

[Gerd Hoffmann <kraxel@redhat.com>]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

This helps debugging clipboard serial sync issues.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220912102455.111765-2-marcandre.lureau@redhat.com>

[ kraxel: code style fix ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/clipboard.c  | 11 +++++++++--
 ui/vdagent.c    |  4 ++++
 ui/trace-events |  5 +++++
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/ui/clipboard.c b/ui/clipboard.c
index 9079ef829b51..cd5382fcb0c1 100644
--- a/ui/clipboard.c
+++ b/ui/clipboard.c
@@ -1,5 +1,6 @@
 #include "qemu/osdep.h"
 #include "ui/clipboard.h"
+#include "trace.h"
 
 static NotifierList clipboard_notifiers =
     NOTIFIER_LIST_INITIALIZER(clipboard_notifiers);
@@ -43,17 +44,23 @@ void qemu_clipboard_peer_release(QemuClipboardPeer *peer,
 
 bool qemu_clipboard_check_serial(QemuClipboardInfo *info, bool client)
 {
+    bool ok;
+
     if (!info->has_serial ||
         !cbinfo[info->selection] ||
         !cbinfo[info->selection]->has_serial) {
+        trace_clipboard_check_serial(-1, -1, true);
         return true;
     }
 
     if (client) {
-        return cbinfo[info->selection]->serial >= info->serial;
+        ok = cbinfo[info->selection]->serial >= info->serial;
     } else {
-        return cbinfo[info->selection]->serial > info->serial;
+        ok = cbinfo[info->selection]->serial > info->serial;
     }
+
+    trace_clipboard_check_serial(cbinfo[info->selection]->serial, info->serial, ok);
+    return ok;
 }
 
 void qemu_clipboard_update(QemuClipboardInfo *info)
diff --git a/ui/vdagent.c b/ui/vdagent.c
index a899eed195d3..58ce7507fddc 100644
--- a/ui/vdagent.c
+++ b/ui/vdagent.c
@@ -533,6 +533,8 @@ static void vdagent_clipboard_recv_grab(VDAgentChardev *vd, uint8_t s, uint32_t
         info->has_serial = true;
         info->serial = *(uint32_t *)data;
         if (info->serial < vd->last_serial[s]) {
+            trace_vdagent_cb_grab_discard(GET_NAME(sel_name, s),
+                                          vd->last_serial[s], info->serial);
             /* discard lower-ordering guest grab */
             return;
         }
@@ -853,6 +855,8 @@ static void vdagent_chr_accept_input(Chardev *chr)
 
 static void vdagent_disconnect(VDAgentChardev *vd)
 {
+    trace_vdagent_disconnect();
+
     buffer_reset(&vd->outbuf);
     vdagent_reset_bufs(vd);
     vd->caps = 0;
diff --git a/ui/trace-events b/ui/trace-events
index a922f00e10b4..977577fbba58 100644
--- a/ui/trace-events
+++ b/ui/trace-events
@@ -127,15 +127,20 @@ xkeymap_vendor(const char *name) "vendor '%s'"
 xkeymap_keycodes(const char *name) "keycodes '%s'"
 xkeymap_keymap(const char *name) "keymap '%s'"
 
+# clipboard.c
+clipboard_check_serial(int cur, int recv, bool ok) "cur:%d recv:%d %d"
+
 # vdagent.c
 vdagent_open(void) ""
 vdagent_close(void) ""
+vdagent_disconnect(void) ""
 vdagent_send(const char *name) "msg %s"
 vdagent_send_empty_clipboard(void) ""
 vdagent_recv_chunk(uint32_t size) "size %d"
 vdagent_recv_msg(const char *name, uint32_t size) "msg %s, size %d"
 vdagent_peer_cap(const char *name) "cap %s"
 vdagent_cb_grab_selection(const char *name) "selection %s"
+vdagent_cb_grab_discard(const char *name, int cur, int recv) "selection %s, cur:%d recv:%d"
 vdagent_cb_grab_type(const char *name) "type %s"
 vdagent_cb_serial_discard(uint32_t current, uint32_t received) "current=%u, received=%u"
 
-- 
2.37.3