[PATCH v2 2/4] gdb/dap: ignore unused keyword args in step_out

[Gregory Anders <greg@gpanders.com>]

Some DAP clients may send additional parameters in the stepOut command
(e.g. "granularity") which are not used by GDB, but should nonetheless
be accepted without error.
---
 gdb/python/lib/gdb/dap/next.py   | 2 +-
 gdb/python/lib/gdb/dap/server.py | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/gdb/python/lib/gdb/dap/next.py b/gdb/python/lib/gdb/dap/next.py
index 8b112770..5d49c871 100644
--- a/gdb/python/lib/gdb/dap/next.py
+++ b/gdb/python/lib/gdb/dap/next.py
@@ -69,7 +69,7 @@ def step_in(
 
 
 @request("stepOut")
-def step_out(*, threadId: int, singleThread: bool = False):
+def step_out(*, threadId: int, singleThread: bool = False, **args):
     send_gdb(lambda: _handle_thread_step(threadId, singleThread))
     send_gdb(ExecutionInvoker("finish", StopKinds.STEP))
 
diff --git a/gdb/python/lib/gdb/dap/server.py b/gdb/python/lib/gdb/dap/server.py
index db7893a3..d84bca5d 100644
--- a/gdb/python/lib/gdb/dap/server.py
+++ b/gdb/python/lib/gdb/dap/server.py
@@ -13,6 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import inspect
 import json
 import queue
 import sys
@@ -165,6 +166,12 @@ def request(name):
 
     def wrap(func):
         global _commands
+        code = func.__code__
+        # We don't permit requests to have positional arguments.
+        assert code.co_posonlyargcount == 0
+        assert code.co_argcount == 0
+        # A request must have a **args parameter.
+        assert code.co_flags & inspect.CO_VARKEYWORDS
         # All requests must run in the DAP thread.
         # Also type-check the calls.
         func = in_dap_thread(type_check(func))
-- 
2.42.0