From de3b3f529d453dfaa1f8b437c1a1f0766d8108e4 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Thu, 16 Mar 2023 08:13:25 +0100 Subject: qapi: Require boxed for conditional command and event arguments The C code generator fails to honor 'if' conditions of command and event arguments. For instance, tests/qapi-schema/qapi-schema-test.json has { 'event': 'TEST_IF_EVENT', 'data': { 'foo': 'TestIfStruct', 'bar': { 'type': ['str'], 'if': 'TEST_IF_EVT_ARG' } }, 'if': { 'all': ['TEST_IF_EVT', 'TEST_IF_STRUCT'] } } Generated tests/test-qapi-events.h fails to honor the TEST_IF_EVT_ARG condition: #if defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT) void qapi_event_send_test_if_event(TestIfStruct *foo, strList *bar); #endif /* defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT) */ Only uses so far are in tests/. We could fix the generator to emit something like #if defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT) void qapi_event_send_test_if_event(TestIfStruct *foo #if defined(TEST_IF_EVT_ARG) , strList *bar #endif ); #endif /* defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT) */ Ugly. Calls become similarly ugly. Not worth fixing. Conditional arguments work fine with 'boxed': true, simply because complex types with conditional members work fine. Not worth breaking. Reject conditional arguments unless boxed. Move the tests cases covering unboxed conditional arguments out of tests/qapi-schema/qapi-schema-test.json. Cover boxed conditional arguments there instead. Signed-off-by: Markus Armbruster Message-Id: <20230316071325.492471-15-armbru@redhat.com> Reviewed-by: Eric Blake --- scripts/qapi/schema.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'scripts/qapi/schema.py') diff --git a/scripts/qapi/schema.py b/scripts/qapi/schema.py index 719152fe49..8f31f8832f 100644 --- a/scripts/qapi/schema.py +++ b/scripts/qapi/schema.py @@ -486,6 +486,10 @@ class QAPISchemaObjectType(QAPISchemaType): assert self.members is not None return not self.members and not self.variants + def has_conditional_members(self): + assert self.members is not None + return any(m.ifcond.is_present() for m in self.members) + def c_name(self): assert self.name != 'q_empty' return super().c_name() @@ -817,6 +821,11 @@ class QAPISchemaCommand(QAPISchemaEntity): self.info, "command's 'data' can take %s only with 'boxed': true" % self.arg_type.describe()) + self.arg_type.check(schema) + if self.arg_type.has_conditional_members() and not self.boxed: + raise QAPISemError( + self.info, + "conditional command arguments require 'boxed': true") if self._ret_type_name: self.ret_type = schema.resolve_type( self._ret_type_name, self.info, "command's 'returns'") @@ -872,6 +881,11 @@ class QAPISchemaEvent(QAPISchemaEntity): self.info, "event's 'data' can take %s only with 'boxed': true" % self.arg_type.describe()) + self.arg_type.check(schema) + if self.arg_type.has_conditional_members() and not self.boxed: + raise QAPISemError( + self.info, + "conditional event arguments require 'boxed': true") def connect_doc(self, doc=None): super().connect_doc(doc) -- cgit 1.4.1