[Qemu-devel] [PULL 08/37] gdbstub: add multiprocess support to 'sC' packets

[Peter Maydell]

From: Luc Michel <address@hidden>

Change the sC packet handling to support the multiprocess extension.
Instead of returning the first thread, we return the first thread of the
current process.

Signed-off-by: Luc Michel <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Reviewed-by: Alistair Francis <address@hidden>
Reviewed-by: Edgar E. Iglesias <address@hidden>
Message-id: address@hidden
[PMM: corrected checkpatch comment style nit]
Signed-off-by: Peter Maydell <address@hidden>
---
 gdbstub.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/gdbstub.c b/gdbstub.c
index 09114ea7769..1ba7aa6a28a 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1554,9 +1554,15 @@ static int gdb_handle_packet(GDBState *s, const char 
*line_buf)
             put_packet(s, "OK");
             break;
         } else if (strcmp(p,"C") == 0) {
-            /* "Current thread" remains vague in the spec, so always return
-             *  the first CPU (gdb returns the first thread). */
-            put_packet(s, "QC1");
+            /*
+             * "Current thread" remains vague in the spec, so always return
+             * the first thread of the current process (gdb returns the
+             * first thread).
+             */
+            cpu = get_first_cpu_in_process(s, gdb_get_cpu_process(s, 
s->g_cpu));
+            snprintf(buf, sizeof(buf), "QC%s",
+                     gdb_fmt_thread_id(s, cpu, thread_id, sizeof(thread_id)));
+            put_packet(s, buf);
             break;
         } else if (strcmp(p,"fThreadInfo") == 0) {
             s->query_cpu = first_cpu;
-- 
2.19.2