gdb_server: fix ignored interrupt request from gdb during stepping

Normally, when a ctrl-c is received from gdb, a SIGINT is reported back
unconditionally to tell gdb that the target has stopped in response.
However when a rtos support was configured, the rtos awareness overwrote
the signal with an actual thread state, which gdb then ignored and got
stuck without the user able to interrupt.

Change-Id: I40fd62333e020a8c4d9df0079270e84df9c77f88
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/4445
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>

diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index 2acebe83968eb0d224b7e6273a30509d72724967..712c393417353c5a90bcf532a5c1daa5f66ac8d9 100644 (file)
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -732,7 +732,6 @@ static void gdb_signal_reply(struct target *target, struct connection *connectio
        } else {
                if (gdb_connection->ctrl_c) {
                        signal_var = 0x2;
-                       gdb_connection->ctrl_c = 0;
                } else
                        signal_var = gdb_last_signal(target);
 
@@ -769,11 +768,14 @@ static void gdb_signal_reply(struct target *target, struct connection *connectio
                                        target->rtos->current_thread);
                        target->rtos->current_threadid = target->rtos->current_thread;
                        target->rtos->gdb_target_for_threadid(connection, target->rtos->current_threadid, &ct);
-                       signal_var = gdb_last_signal(ct);
+                       if (!gdb_connection->ctrl_c)
+                               signal_var = gdb_last_signal(ct);
                }
 
                sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "T%2.2x%s%s",
                                signal_var, stop_reason, current_thread);
+
+               gdb_connection->ctrl_c = 0;
        }
 
        gdb_put_packet(connection, sig_reply, sig_reply_len);