[Qemu-devel] [PATCH] gdbstub: Fix handling of '!' packet with new infra

[Ramiro Polla]

Since the '!' packet is not handled by the new infrastructure,
gdb_handle_packet() would call run_cmd_parser() with a NULL cmd_parser
value, which would lead to an unsupported packet ("$#00") being sent,
which could confuse the gdb client.

This also has a side-effect of speeding up the initial connection with
gdb.

Fixes: 3e2c12615b52 ("gdbstub: Implement deatch (D pkt) with new infra")
Signed-off-by: Ramiro Polla <ramiro.po...@gmail.com>
---
 gdbstub.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gdbstub.c b/gdbstub.c
index b470aec8ea..d051344488 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -2587,7 +2587,9 @@ static int gdb_handle_packet(GDBState *s, const char 
*line_buf)
         break;
     }
 
-    run_cmd_parser(s, line_buf, cmd_parser);
+    if (cmd_parser) {
+        run_cmd_parser(s, line_buf, cmd_parser);
+    }
 
     return RS_IDLE;
 }
-- 
2.11.0