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qapi/commands: Optionally generate trace for QMP commands

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Add trace generation disabled by default and new option --gen-trace to
enable it.  The next commit will enable it for qapi/, but not for qga/
and tests/.  Making it work for the latter two would involve some Meson
hackery to ensure we generate the trace-events files before trace-tool
uses them.  Since we don't actually support tracing there, we'll bypass
that problem.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220126161130.3240892-4-vsementsov@virtuozzo.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Superfluous #include dropped]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2022-01-26 17:11:26 +01:00 • committed by Markus Armbruster
parent 167d913f34
commit bd2017bc41
2 changed files with 90 additions and 14 deletions
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14
scripts/qapi/main.py
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@ -32,7 +32,8 @@ def generate(schema_file: str,
output_dir: str,
prefix: str,
unmask: bool = False,
builtins: bool = False) -> None:
builtins: bool = False,
gen_tracing: 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, gen_tracing)
gen_events(schema, output_dir, prefix)
gen_introspect(schema, output_dir, prefix, unmask)
@ -74,6 +75,12 @@ def main() -> int:
parser.add_argument('-u', '--unmask-non-abi-names', action='store_true',
dest='unmask',
help="expose non-ABI names in introspection")
# Option --gen-trace exists so we can avoid solving build system
# problems. TODO Drop it when we no longer need it.
parser.add_argument('--gen-trace', action='store_true',
help="add trace events to qmp marshals")
parser.add_argument('schema', action='store')
args = parser.parse_args()
@ -88,7 +95,8 @@ def main() -> int:
output_dir=args.output_dir,
prefix=args.prefix,
unmask=args.unmask,
builtins=args.builtins)
builtins=args.builtins,
gen_tracing=args.gen_trace)
except QAPIError as err:
print(f"{sys.argv[0]}: {str(err)}", file=sys.stderr)
return 1