From patchwork Mon Nov 11 15:55:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 13870936 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2FC81E6781E for ; Mon, 11 Nov 2024 15:56:53 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tAWlz-000455-QH; Mon, 11 Nov 2024 10:56:15 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tAWlv-00044b-BX for qemu-devel@nongnu.org; Mon, 11 Nov 2024 10:56:11 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tAWlt-0000ln-RF for qemu-devel@nongnu.org; Mon, 11 Nov 2024 10:56:11 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1731340568; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oR2NEtZr5EmBntWh/rf+1SdXvwyPhmQQ/U96CK3tiTo=; b=Qvex4vopMK83biMhABiMgOi4whsEmJNR04DTNXv+RCpUHvk7YLd+L/XLTF4A0Ji2Z1ViRx 6plXcBmMI85lE47BCPwcXLZn/0YzD3dqXsyT35WkGdJIxuGCMruShUJCtU4S0Ly7uY2+JS y3GXjcgfqTw70ZpIo+QO20xvgPU2g3U= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-584-9QyJjl8AMpegmNtERwtJJA-1; Mon, 11 Nov 2024 10:56:03 -0500 X-MC-Unique: 9QyJjl8AMpegmNtERwtJJA-1 X-Mimecast-MFC-AGG-ID: 9QyJjl8AMpegmNtERwtJJA Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7F0701954128 for ; Mon, 11 Nov 2024 15:56:02 +0000 (UTC) Received: from toolbox.redhat.com (unknown [10.42.28.238]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 54F01195E480; Mon, 11 Nov 2024 15:55:59 +0000 (UTC) From: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Markus Armbruster , Peter Xu , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= Subject: [PATCH v2 1/8] qom: refactor checking abstract property when creating instances Date: Mon, 11 Nov 2024 15:55:48 +0000 Message-ID: <20241111155555.90091-2-berrange@redhat.com> In-Reply-To: <20241111155555.90091-1-berrange@redhat.com> References: <20241111155555.90091-1-berrange@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.122, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org Push an Error object into object_initialize_with_type, so that reporting of attempts to create an abstract type is handled at the lowest level. Signed-off-by: Daniel P. Berrangé --- qom/object.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/qom/object.c b/qom/object.c index 9edc06d391..dc125e55bc 100644 --- a/qom/object.c +++ b/qom/object.c @@ -559,14 +559,20 @@ static void object_class_property_init_all(Object *obj) } } -static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type) +static bool object_initialize_with_type(Object *obj, size_t size, + TypeImpl *type, Error **errp) { type_initialize(type); g_assert(type->instance_size >= sizeof(Object)); - g_assert(type->abstract == false); g_assert(size >= type->instance_size); + if (type->abstract) { + error_setg(errp, "Abstract type '%s' cannot be instantiated", + type->name); + return false; + } + memset(obj, 0, type->instance_size); obj->class = type->class; object_ref(obj); @@ -575,13 +581,15 @@ static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type NULL, object_property_free); object_init_with_type(obj, type); object_post_init_with_type(obj, type); + + return true; } void object_initialize(void *data, size_t size, const char *typename) { TypeImpl *type = type_get_or_load_by_name(typename, &error_fatal); - object_initialize_with_type(data, size, type); + object_initialize_with_type(data, size, type, &error_abort); } bool object_initialize_child_with_props(Object *parentobj, @@ -753,7 +761,7 @@ typedef union { } qemu_max_align_t; #endif -static Object *object_new_with_type(Type type) +static Object *object_new_with_type(Type type, Error **errp) { Object *obj; size_t size, align; @@ -777,7 +785,10 @@ static Object *object_new_with_type(Type type) obj_free = qemu_vfree; } - object_initialize_with_type(obj, size, type); + if (!object_initialize_with_type(obj, size, type, errp)) { + g_free(obj); + return NULL; + } obj->free = obj_free; return obj; @@ -785,14 +796,14 @@ static Object *object_new_with_type(Type type) Object *object_new_with_class(ObjectClass *klass) { - return object_new_with_type(klass->type); + return object_new_with_type(klass->type, &error_abort); } Object *object_new(const char *typename) { TypeImpl *ti = type_get_or_load_by_name(typename, &error_fatal); - return object_new_with_type(ti); + return object_new_with_type(ti, &error_abort); } @@ -829,11 +840,10 @@ Object *object_new_with_propv(const char *typename, return NULL; } - if (object_class_is_abstract(klass)) { - error_setg(errp, "object type '%s' is abstract", typename); + obj = object_new_with_type(klass->type, errp); + if (!obj) { return NULL; } - obj = object_new_with_type(klass->type); if (!object_set_propv(obj, errp, vargs)) { goto error;