[PATCH 6/8] tests/tcg: ensure system-mode gdb tests start stopped

["Alex Bennée" <alex.bennee@linaro.org>]

Without -S we run into potential races with tests starting before the
gdbstub attaches. We don't need to worry about user-mode as enabling
the gdbstub implies we wait for the initial connection.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 tests/guest-debug/run-test.py | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/tests/guest-debug/run-test.py b/tests/guest-debug/run-test.py
index c0d0075e2e..b13b27d4b1 100755
--- a/tests/guest-debug/run-test.py
+++ b/tests/guest-debug/run-test.py
@@ -69,13 +69,10 @@ def log(output, msg):
 
     # Launch QEMU with binary
     if "system" in args.qemu:
-        cmd = "%s %s %s -gdb unix:path=%s,server=on" % (args.qemu,
-                                                        args.qargs,
-                                                        args.binary,
-                                                        socket_name)
+        cmd = f'{args.qemu} {args.qargs} {args.binary}' \
+            f' -S -gdb unix:path={socket_name},server=on'
     else:
-        cmd = "%s %s -g %s %s" % (args.qemu, args.qargs, socket_name,
-                                  args.binary)
+        cmd = f'{args.qemu} {args.qargs} -g {socket_name} {args.binary}'
 
     log(output, "QEMU CMD: %s" % (cmd))
     inferior = subprocess.Popen(shlex.split(cmd))
-- 
2.39.2