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Mon, 17 Jan 2022 20:19:04 +0000 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org Cc: stefanha@redhat.com, michael.roth@amd.com, armbru@redhat.com, vsementsov@virtuozzo.com, jsnow@redhat.com, hreitz@redhat.com, kwolf@redhat.com, pbonzini@redhat.com Subject: [PATCH v3 2/3] scripts/qapi-gen.py: add --add-trace-events option Date: Mon, 17 Jan 2022 21:18:44 +0100 Message-Id: <20220117201845.2438382-3-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220117201845.2438382-1-vsementsov@virtuozzo.com> References: <20220117201845.2438382-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: AM6P193CA0069.EURP193.PROD.OUTLOOK.COM (2603:10a6:209:8e::46) To AM9PR08MB6737.eurprd08.prod.outlook.com (2603:10a6:20b:304::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 248ffeec-857a-4196-d762-08d9d9f69b21 X-MS-TrafficTypeDiagnostic: VI1PR08MB2957:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:265; 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envelope-from=vsementsov@virtuozzo.com; helo=EUR04-VI1-obe.outbound.protection.outlook.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add and option to generate trace events. We should generate both trace events and trace-events files for further trace events code generation. Signed-off-by: Vladimir Sementsov-Ogievskiy --- scripts/qapi/commands.py | 91 ++++++++++++++++++++++++++++++++++------ scripts/qapi/main.py | 10 +++-- 2 files changed, 85 insertions(+), 16 deletions(-) diff --git a/scripts/qapi/commands.py b/scripts/qapi/commands.py index 21001bbd6b..8cd1aa41ce 100644 --- a/scripts/qapi/commands.py +++ b/scripts/qapi/commands.py @@ -53,7 +53,8 @@ def gen_command_decl(name: str, def gen_call(name: str, arg_type: Optional[QAPISchemaObjectType], boxed: bool, - ret_type: Optional[QAPISchemaType]) -> str: + ret_type: Optional[QAPISchemaType], + add_trace_events: bool) -> str: ret = '' argstr = '' @@ -71,21 +72,65 @@ def gen_call(name: str, if ret_type: lhs = 'retval = ' - ret = mcgen(''' + name = c_name(name) + upper = name.upper() - %(lhs)sqmp_%(c_name)s(%(args)s&err); - error_propagate(errp, err); -''', - c_name=c_name(name), args=argstr, lhs=lhs) - if ret_type: + if add_trace_events: ret += mcgen(''' + + if (trace_event_get_state_backends(TRACE_QMP_ENTER_%(upper)s)) { + g_autoptr(GString) req_json = qobject_to_json(QOBJECT(args)); + trace_qmp_enter_%(name)s(req_json->str); + } + ''', + upper=upper, name=name) + + ret += mcgen(''' + + %(lhs)sqmp_%(name)s(%(args)s&err); +''', + name=name, args=argstr, lhs=lhs) + + ret += mcgen(''' if (err) { +''') + + if add_trace_events: + ret += mcgen(''' + trace_qmp_exit_%(name)s(error_get_pretty(err), false); +''', + name=name) + + ret += mcgen(''' + error_propagate(errp, err); goto out; } +''') + + if ret_type: + ret += mcgen(''' qmp_marshal_output_%(c_name)s(retval, ret, errp); ''', c_name=ret_type.c_name()) + + if add_trace_events: + if ret_type: + ret += mcgen(''' + + if (trace_event_get_state_backends(TRACE_QMP_EXIT_%(upper)s)) { + g_autoptr(GString) ret_json = qobject_to_json(*ret); + trace_qmp_exit_%(name)s(ret_json->str, true); + } + ''', + upper=upper, name=name) + else: + ret += mcgen(''' + + trace_qmp_exit_%(name)s("{}", true); + ''', + name=name) + return ret @@ -122,10 +167,17 @@ def gen_marshal_decl(name: str) -> str: proto=build_marshal_proto(name)) +def gen_trace(name: str) -> str: + name = c_name(name) + return f"""\ +qmp_enter_{name}(const char *json) "%s"\n +qmp_exit_{name}(const char *result, bool succeeded) "%s %d"\n""" + def gen_marshal(name: str, arg_type: Optional[QAPISchemaObjectType], boxed: bool, - ret_type: Optional[QAPISchemaType]) -> str: + ret_type: Optional[QAPISchemaType], + add_trace_events: bool) -> str: have_args = boxed or (arg_type and not arg_type.is_empty()) if have_args: assert arg_type is not None @@ -180,7 +232,7 @@ def gen_marshal(name: str, } ''') - ret += gen_call(name, arg_type, boxed, ret_type) + ret += gen_call(name, arg_type, boxed, ret_type, add_trace_events) ret += mcgen(''' @@ -238,11 +290,12 @@ def gen_register_command(name: str, class QAPISchemaGenCommandVisitor(QAPISchemaModularCVisitor): - def __init__(self, prefix: str): + def __init__(self, prefix: str, add_trace_events: bool): super().__init__( prefix, 'qapi-commands', ' * Schema-defined QAPI/QMP commands', None, __doc__) self._visited_ret_types: Dict[QAPIGenC, Set[QAPISchemaType]] = {} + self.add_trace_events = add_trace_events def _begin_user_module(self, name: str) -> None: self._visited_ret_types[self._genc] = set() @@ -261,6 +314,15 @@ def _begin_user_module(self, name: str) -> None: ''', commands=commands, visit=visit)) + + if self.add_trace_events and c_name(commands) != 'qapi_commands': + self._genc.add(mcgen(''' +#include "trace/trace-qapi.h" +#include "qapi/qmp/qjson.h" +#include "trace/trace-%(nm)s_trace_events.h" +''', + nm=c_name(commands))) + self._genh.add(mcgen(''' #include "%(types)s.h" @@ -322,7 +384,9 @@ def visit_command(self, with ifcontext(ifcond, self._genh, self._genc): self._genh.add(gen_command_decl(name, arg_type, boxed, ret_type)) self._genh.add(gen_marshal_decl(name)) - self._genc.add(gen_marshal(name, arg_type, boxed, ret_type)) + self._genc.add(gen_marshal(name, arg_type, boxed, ret_type, + self.add_trace_events)) + self._gent.add(gen_trace(name)) with self._temp_module('./init'): with ifcontext(ifcond, self._genh, self._genc): self._genc.add(gen_register_command( @@ -332,7 +396,8 @@ def visit_command(self, def gen_commands(schema: QAPISchema, output_dir: str, - prefix: str) -> None: - vis = QAPISchemaGenCommandVisitor(prefix) + prefix: str, + add_trace_events: bool) -> None: + vis = QAPISchemaGenCommandVisitor(prefix, add_trace_events) schema.visit(vis) vis.write(output_dir) diff --git a/scripts/qapi/main.py b/scripts/qapi/main.py index f2ea6e0ce4..7fab71401c 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_events: 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_events) 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-events', action='store_true', + help="add trace events 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_events=args.add_trace_events) except QAPIError as err: print(f"{sys.argv[0]}: {str(err)}", file=sys.stderr) return 1 -- 2.31.1