[PATCH v2 3/4] scripts/qapi-gen.py: add --add-trace-points option

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

Add and option to generate trace points. We should generate both trace
points and trace-events files for further trace point code generation.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 scripts/qapi/gen.py  | 13 ++++++++++---
 scripts/qapi/main.py | 10 +++++++---
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/scripts/qapi/gen.py b/scripts/qapi/gen.py
index 995a97d2b8..605b3fe68a 100644
--- a/scripts/qapi/gen.py
+++ b/scripts/qapi/gen.py
@@ -251,7 +251,7 @@ def __init__(self,
         self._builtin_blurb = builtin_blurb
         self._pydoc = pydoc
         self._current_module: Optional[str] = None
-        self._module: Dict[str, Tuple[QAPIGenC, QAPIGenH]] = {}
+        self._module: Dict[str, Tuple[QAPIGenC, QAPIGenH, QAPIGen]] = {}
         self._main_module: Optional[str] = None
 
     @property
@@ -264,6 +264,11 @@ def _genh(self) -> QAPIGenH:
         assert self._current_module is not None
         return self._module[self._current_module][1]
 
+    @property
+    def _gent(self) -> QAPIGen:
+        assert self._current_module is not None
+        return self._module[self._current_module][2]
+
     @staticmethod
     def _module_dirname(name: str) -> str:
         if QAPISchemaModule.is_user_module(name):
@@ -293,7 +298,8 @@ def _add_module(self, name: str, blurb: str) -> None:
         basename = self._module_filename(self._what, name)
         genc = QAPIGenC(basename + '.c', blurb, self._pydoc)
         genh = QAPIGenH(basename + '.h', blurb, self._pydoc)
-        self._module[name] = (genc, genh)
+        gent = QAPIGen(basename + '.trace-events')
+        self._module[name] = (genc, genh, gent)
         self._current_module = name
 
     @contextmanager
@@ -304,11 +310,12 @@ def _temp_module(self, name: str) -> Iterator[None]:
         self._current_module = old_module
 
     def write(self, output_dir: str, opt_builtins: bool = False) -> None:
-        for name, (genc, genh) in self._module.items():
+        for name, (genc, genh, gent) in self._module.items():
             if QAPISchemaModule.is_builtin_module(name) and not opt_builtins:
                 continue
             genc.write(output_dir)
             genh.write(output_dir)
+            gent.write(output_dir)
 
     def _begin_builtin_module(self) -> None:
         pass
diff --git a/scripts/qapi/main.py b/scripts/qapi/main.py
index f2ea6e0ce4..3adf0319cf 100644
--- a/scripts/qapi/main.py
+++ b/scripts/qapi/main.py
@@ -32,7 +32,8 @@ def generate(schema_file: str,
              output_dir: str,
              prefix: str,
              unmask: bool = False,
-             builtins: bool = False) -> None:
+             builtins: bool = False,
+             add_trace_points: bool = False) -> None:
     """
     Generate C code for the given schema into the target directory.
 
@@ -49,7 +50,7 @@ def generate(schema_file: str,
     schema = QAPISchema(schema_file)
     gen_types(schema, output_dir, prefix, builtins)
     gen_visit(schema, output_dir, prefix, builtins)
-    gen_commands(schema, output_dir, prefix)
+    gen_commands(schema, output_dir, prefix, add_trace_points)
     gen_events(schema, output_dir, prefix)
     gen_introspect(schema, output_dir, prefix, unmask)
 
@@ -74,6 +75,8 @@ def main() -> int:
     parser.add_argument('-u', '--unmask-non-abi-names', action='store_true',
                         dest='unmask',
                         help="expose non-ABI names in introspection")
+    parser.add_argument('--add-trace-points', action='store_true',
+                        help="add trace points to qmp marshals")
     parser.add_argument('schema', action='store')
     args = parser.parse_args()
 
@@ -88,7 +91,8 @@ def main() -> int:
                  output_dir=args.output_dir,
                  prefix=args.prefix,
                  unmask=args.unmask,
-                 builtins=args.builtins)
+                 builtins=args.builtins,
+                 add_trace_points=args.add_trace_points)
     except QAPIError as err:
         print(f"{sys.argv[0]}: {str(err)}", file=sys.stderr)
         return 1
-- 
2.31.1