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[babeltrace.git] / src / lib / trace-ir / field-class.c
index ffb972f4aa083058f093f3e5326ce39fd00e74f6..cd9eeaba7d091eec45e8c611d2d52dc9c60a1b2c 100644 (file)
@@ -1,33 +1,15 @@
 /*
+ * SPDX-License-Identifier: MIT
+ *
  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
  */
 
 #define BT_LOG_TAG "LIB/FIELD-CLASS"
 #include "lib/logging.h"
 
-#include "lib/assert-pre.h"
+#include "lib/assert-cond.h"
 #include <babeltrace2/trace-ir/field-class.h>
-#include <babeltrace2/trace-ir/field-class-const.h>
-#include <babeltrace2/trace-ir/field-const.h>
 #include <babeltrace2/trace-ir/field.h>
 #include <babeltrace2/trace-ir/clock-class.h>
 #include "lib/object.h"
@@ -37,6 +19,7 @@
 #include "compat/glib.h"
 #include <float.h>
 #include <inttypes.h>
+#include <stdbool.h>
 #include <stdlib.h>
 
 #include "clock-class.h"
 #include "utils.h"
 #include "lib/func-status.h"
 #include "lib/integer-range-set.h"
+#include "lib/value.h"
 
+BT_EXPORT
 enum bt_field_class_type bt_field_class_get_type(
                const struct bt_field_class *fc)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
        return fc->type;
 }
 
 static
-void init_field_class(struct bt_field_class *fc, enum bt_field_class_type type,
+int init_field_class(struct bt_field_class *fc, enum bt_field_class_type type,
                bt_object_release_func release_func)
 {
+       int ret = 0;
+
        BT_ASSERT(fc);
        BT_ASSERT(release_func);
        bt_object_init_shared(&fc->base, release_func);
        fc->type = type;
+       fc->user_attributes = bt_value_map_create();
+       if (!fc->user_attributes) {
+               BT_LIB_LOGE_APPEND_CAUSE(
+                       "Failed to create a map value object.");
+               ret = -1;
+               goto end;
+       }
+
+end:
+       return ret;
+}
+
+static
+void finalize_field_class(struct bt_field_class *fc)
+{
+       BT_OBJECT_PUT_REF_AND_RESET(fc->user_attributes);
+}
+
+static
+void destroy_bit_array_field_class(struct bt_object *obj)
+{
+       BT_ASSERT(obj);
+       BT_LIB_LOGD("Destroying bit array field class object: %!+F", obj);
+       finalize_field_class((void *) obj);
+       g_free(obj);
+}
+
+BT_EXPORT
+struct bt_field_class *bt_field_class_bit_array_create(
+               struct bt_trace_class *trace_class, uint64_t length)
+{
+       struct bt_field_class_bit_array *ba_fc = NULL;
+
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
+       BT_ASSERT_PRE("valid-length", length > 0 && length <= 64,
+               "Unsupported length for bit array field class "
+               "(minimum is 1, maximum is 64): length=%" PRIu64, length);
+       BT_LOGD("Creating default bit array field class object.");
+       ba_fc = g_new0(struct bt_field_class_bit_array, 1);
+       if (!ba_fc) {
+               BT_LIB_LOGE_APPEND_CAUSE(
+                       "Failed to allocate one bit array field class.");
+               goto error;
+       }
+
+       if (init_field_class((void *) ba_fc, BT_FIELD_CLASS_TYPE_BIT_ARRAY,
+                       destroy_bit_array_field_class)) {
+               goto error;
+       }
+
+       ba_fc->length = length;
+       BT_LIB_LOGD("Created bit array field class object: %!+F", ba_fc);
+       goto end;
+
+error:
+       BT_OBJECT_PUT_REF_AND_RESET(ba_fc);
+
+end:
+       return (void *) ba_fc;
+}
+
+BT_EXPORT
+uint64_t bt_field_class_bit_array_get_length(const struct bt_field_class *fc)
+{
+       const struct bt_field_class_bit_array *ba_fc = (const void *) fc;
+
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_HAS_TYPE("field-class", fc, "bit-array",
+               BT_FIELD_CLASS_TYPE_BIT_ARRAY, "Field class");
+       return ba_fc->length;
 }
 
 static
-void init_integer_field_class(struct bt_field_class_integer *fc,
+void destroy_bool_field_class(struct bt_object *obj)
+{
+       BT_ASSERT(obj);
+       BT_LIB_LOGD("Destroying boolean field class object: %!+F", obj);
+       finalize_field_class((void *) obj);
+       g_free(obj);
+}
+
+BT_EXPORT
+struct bt_field_class *bt_field_class_bool_create(
+               bt_trace_class *trace_class)
+{
+       struct bt_field_class_bool *bool_fc = NULL;
+
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
+       BT_LOGD("Creating default boolean field class object.");
+       bool_fc = g_new0(struct bt_field_class_bool, 1);
+       if (!bool_fc) {
+               BT_LIB_LOGE_APPEND_CAUSE(
+                       "Failed to allocate one boolean field class.");
+               goto error;
+       }
+
+       if (init_field_class((void *) bool_fc, BT_FIELD_CLASS_TYPE_BOOL,
+                       destroy_bool_field_class)) {
+               goto error;
+       }
+
+       BT_LIB_LOGD("Created boolean field class object: %!+F", bool_fc);
+       goto end;
+
+error:
+       BT_OBJECT_PUT_REF_AND_RESET(bool_fc);
+
+end:
+       return (void *) bool_fc;
+}
+
+static
+int init_integer_field_class(struct bt_field_class_integer *fc,
                enum bt_field_class_type type,
                bt_object_release_func release_func)
 {
-       init_field_class((void *) fc, type, release_func);
+       int ret;
+
+       ret = init_field_class((void *) fc, type, release_func);
+       if (ret) {
+               goto end;
+       }
+
        fc->range = 64;
        fc->base = BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_DECIMAL;
+
+end:
+       return ret;
 }
 
 static
@@ -79,6 +186,7 @@ void destroy_integer_field_class(struct bt_object *obj)
 {
        BT_ASSERT(obj);
        BT_LIB_LOGD("Destroying integer field class object: %!+F", obj);
+       finalize_field_class((void *) obj);
        g_free(obj);
 }
 
@@ -88,7 +196,7 @@ struct bt_field_class *create_integer_field_class(bt_trace_class *trace_class,
 {
        struct bt_field_class_integer *int_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
        BT_LOGD("Creating default integer field class object: type=%s",
                bt_common_field_class_type_string(type));
        int_fc = g_new0(struct bt_field_class_integer, 1);
@@ -98,7 +206,11 @@ struct bt_field_class *create_integer_field_class(bt_trace_class *trace_class,
                goto error;
        }
 
-       init_integer_field_class(int_fc, type, destroy_integer_field_class);
+       if (init_integer_field_class(int_fc, type,
+                       destroy_integer_field_class)) {
+               goto error;
+       }
+
        BT_LIB_LOGD("Created integer field class object: %!+F", int_fc);
        goto end;
 
@@ -109,27 +221,34 @@ end:
        return (void *) int_fc;
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_integer_unsigned_create(
                bt_trace_class *trace_class)
 {
+       BT_ASSERT_PRE_NO_ERROR();
+
        return create_integer_field_class(trace_class,
                BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER);
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_integer_signed_create(
                bt_trace_class *trace_class)
 {
+       BT_ASSERT_PRE_NO_ERROR();
+
        return create_integer_field_class(trace_class,
                BT_FIELD_CLASS_TYPE_SIGNED_INTEGER);
 }
 
+BT_EXPORT
 uint64_t bt_field_class_integer_get_field_value_range(
                const struct bt_field_class *fc)
 {
        const struct bt_field_class_integer *int_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_INT(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_INT("field-class", fc, "Field class");
        return int_fc->range;
 }
 
@@ -141,18 +260,20 @@ bool size_is_valid_for_enumeration_field_class(struct bt_field_class *fc,
        return true;
 }
 
+BT_EXPORT
 void bt_field_class_integer_set_field_value_range(
                struct bt_field_class *fc, uint64_t size)
 {
        struct bt_field_class_integer *int_fc = (void *) fc;
 
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_FC_IS_INT(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HOT(fc, "Field class");
-       BT_ASSERT_PRE(size <= 64,
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_INT("field-class", fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_HOT(fc);
+       BT_ASSERT_PRE("valid-n",
+               size >= 1 && size <= 64,
                "Unsupported size for integer field class's field value range "
-               "(maximum is 64): size=%" PRIu64, size);
-       BT_ASSERT_PRE(
+               "(minimum is 1, maximum is 64): size=%" PRIu64, size);
+       BT_ASSERT_PRE("valid-n-for-enumeration-field-class",
                int_fc->common.type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER ||
                int_fc->common.type == BT_FIELD_CLASS_TYPE_SIGNED_INTEGER ||
                size_is_valid_for_enumeration_field_class(fc, size),
@@ -163,25 +284,27 @@ void bt_field_class_integer_set_field_value_range(
        BT_LIB_LOGD("Set integer field class's field value range: %!+F", fc);
 }
 
+BT_EXPORT
 enum bt_field_class_integer_preferred_display_base
 bt_field_class_integer_get_preferred_display_base(const struct bt_field_class *fc)
 {
        const struct bt_field_class_integer *int_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_INT(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_INT("field-class", fc, "Field class");
        return int_fc->base;
 }
 
+BT_EXPORT
 void bt_field_class_integer_set_preferred_display_base(
                struct bt_field_class *fc,
                enum bt_field_class_integer_preferred_display_base base)
 {
        struct bt_field_class_integer *int_fc = (void *) fc;
 
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_FC_IS_INT(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HOT(fc, "Field class");
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_INT("field-class", fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_HOT(fc);
        int_fc->base = base;
        BT_LIB_LOGD("Set integer field class's preferred display base: %!+F", fc);
 }
@@ -207,6 +330,7 @@ void destroy_enumeration_field_class(struct bt_object *obj)
 
        BT_ASSERT(fc);
        BT_LIB_LOGD("Destroying enumeration field class object: %!+F", fc);
+       finalize_field_class((void *) obj);
 
        if (fc->mappings) {
                uint64_t i;
@@ -234,7 +358,7 @@ struct bt_field_class *create_enumeration_field_class(
 {
        struct bt_field_class_enumeration *enum_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
        BT_LOGD("Creating default enumeration field class object: type=%s",
                bt_common_field_class_type_string(type));
        enum_fc = g_new0(struct bt_field_class_enumeration, 1);
@@ -244,8 +368,11 @@ struct bt_field_class *create_enumeration_field_class(
                goto error;
        }
 
-       init_integer_field_class((void *) enum_fc, type,
-               destroy_enumeration_field_class);
+       if (init_integer_field_class((void *) enum_fc, type,
+                       destroy_enumeration_field_class)) {
+               goto error;
+       }
+
        enum_fc->mappings = g_array_new(FALSE, TRUE,
                sizeof(struct bt_field_class_enumeration_mapping));
        if (!enum_fc->mappings) {
@@ -269,66 +396,77 @@ end:
        return (void *) enum_fc;
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_enumeration_unsigned_create(
                bt_trace_class *trace_class)
 {
+       BT_ASSERT_PRE_NO_ERROR();
+
        return create_enumeration_field_class(trace_class,
                BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION);
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_enumeration_signed_create(
                bt_trace_class *trace_class)
 {
+       BT_ASSERT_PRE_NO_ERROR();
+
        return create_enumeration_field_class(trace_class,
                BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION);
 }
 
+BT_EXPORT
 uint64_t bt_field_class_enumeration_get_mapping_count(
                const struct bt_field_class *fc)
 {
        const struct bt_field_class_enumeration *enum_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_ENUM(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_ENUM("field-class", fc, "Field class");
        return (uint64_t) enum_fc->mappings->len;
 }
 
+BT_EXPORT
 const struct bt_field_class_enumeration_unsigned_mapping *
 bt_field_class_enumeration_unsigned_borrow_mapping_by_index_const(
                const struct bt_field_class *fc, uint64_t index)
 {
        const struct bt_field_class_enumeration *enum_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
        BT_ASSERT_PRE_DEV_VALID_INDEX(index, enum_fc->mappings->len);
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_HAS_TYPE("field-class", fc, "unsigned-enumeration",
+               BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION, "Field class");
        return (const void *) BT_FIELD_CLASS_ENUM_MAPPING_AT_INDEX(fc, index);
 }
 
+BT_EXPORT
 const struct bt_field_class_enumeration_signed_mapping *
 bt_field_class_enumeration_signed_borrow_mapping_by_index_const(
                const struct bt_field_class *fc, uint64_t index)
 {
        const struct bt_field_class_enumeration *enum_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
        BT_ASSERT_PRE_DEV_VALID_INDEX(index, enum_fc->mappings->len);
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_HAS_TYPE("field-class", fc, "signed-enumeration",
+               BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION, "Field class");
        return (const void *) BT_FIELD_CLASS_ENUM_MAPPING_AT_INDEX(fc, index);
 }
 
 static
 const struct bt_field_class_enumeration_mapping *
 borrow_enumeration_field_class_mapping_by_label(
-               const struct bt_field_class_enumeration *fc, const char *label)
+               const struct bt_field_class_enumeration *fc, const char *label,
+               const char *api_func)
 {
        struct bt_field_class_enumeration_mapping *mapping = NULL;
        uint64_t i;
 
-       BT_ASSERT(fc);
-       BT_ASSERT_PRE_DEV_NON_NULL(label, "Label");
+       BT_ASSERT_DBG(fc);
+       BT_ASSERT_PRE_DEV_NON_NULL_FROM_FUNC(api_func, "label", label,
+               "Label");
 
        for (i = 0; i < fc->mappings->len; i++) {
                struct bt_field_class_enumeration_mapping *this_mapping =
@@ -344,35 +482,40 @@ end:
        return mapping;
 }
 
+BT_EXPORT
 const struct bt_field_class_enumeration_signed_mapping *
 bt_field_class_enumeration_signed_borrow_mapping_by_label_const(
                const struct bt_field_class *fc, const char *label)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_HAS_TYPE("field-class", fc, "signed-enumeration",
+               BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION, "Field class");
        return (const void *) borrow_enumeration_field_class_mapping_by_label(
-               (const void *) fc, label);
+               (const void *) fc, label, __func__);
 }
 
+BT_EXPORT
 const struct bt_field_class_enumeration_unsigned_mapping *
 bt_field_class_enumeration_unsigned_borrow_mapping_by_label_const(
                const struct bt_field_class *fc, const char *label)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc,
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_HAS_TYPE("field-class", fc, "unsigned-enumeration",
                BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION, "Field class");
        return (const void *) borrow_enumeration_field_class_mapping_by_label(
-               (const void *) fc, label);
+               (const void *) fc, label, __func__);
 }
 
+BT_EXPORT
 const char *bt_field_class_enumeration_mapping_get_label(
                const struct bt_field_class_enumeration_mapping *mapping)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(mapping, "Enumeration field class mapping");
+       BT_ASSERT_PRE_DEV_NON_NULL("enumeration-field-class-mapping",
+               mapping, "Enumeration field class mapping");
        return mapping->label->str;
 }
 
+BT_EXPORT
 const struct bt_integer_range_set_unsigned *
 bt_field_class_enumeration_unsigned_mapping_borrow_ranges_const(
                const struct bt_field_class_enumeration_unsigned_mapping *u_mapping)
@@ -380,10 +523,12 @@ bt_field_class_enumeration_unsigned_mapping_borrow_ranges_const(
        const struct bt_field_class_enumeration_mapping *mapping =
                (const void *) u_mapping;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(mapping, "Enumeration field class mapping");
+       BT_ASSERT_PRE_DEV_NON_NULL("enumeration-field-class-mapping",
+               mapping, "Enumeration field class mapping");
        return (const void *) mapping->range_set;
 }
 
+BT_EXPORT
 const struct bt_integer_range_set_signed *
 bt_field_class_enumeration_signed_mapping_borrow_ranges_const(
                const struct bt_field_class_enumeration_signed_mapping *s_mapping)
@@ -391,10 +536,12 @@ bt_field_class_enumeration_signed_mapping_borrow_ranges_const(
        const struct bt_field_class_enumeration_mapping *mapping =
                (const void *) s_mapping;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(mapping, "Enumeration field class mapping");
+       BT_ASSERT_PRE_DEV_NON_NULL("enumeration-field-class-mapping",
+               mapping, "Enumeration field class mapping");
        return (const void *) mapping->range_set;
 }
 
+BT_EXPORT
 enum bt_field_class_enumeration_get_mapping_labels_for_value_status
 bt_field_class_enumeration_unsigned_get_mapping_labels_for_value(
                const struct bt_field_class *fc, uint64_t value,
@@ -404,11 +551,13 @@ bt_field_class_enumeration_unsigned_get_mapping_labels_for_value(
        const struct bt_field_class_enumeration *enum_fc = (const void *) fc;
        uint64_t i;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_NON_NULL(label_array, "Label array (output)");
-       BT_ASSERT_PRE_DEV_NON_NULL(count, "Count (output)");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION,
-               "Field class");
+       BT_ASSERT_PRE_DEV_NO_ERROR();
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_NON_NULL("label-array-output", label_array,
+               "Label array (output)");
+       BT_ASSERT_PRE_DEV_NON_NULL("count-output", count, "Count (output)");
+       BT_ASSERT_PRE_DEV_FC_HAS_TYPE("field-class", fc, "unsigned-enumeration",
+               BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION, "Field class");
        g_ptr_array_set_size(enum_fc->label_buf, 0);
 
        for (i = 0; i < enum_fc->mappings->len; i++) {
@@ -435,6 +584,7 @@ bt_field_class_enumeration_unsigned_get_mapping_labels_for_value(
        return BT_FUNC_STATUS_OK;
 }
 
+BT_EXPORT
 enum bt_field_class_enumeration_get_mapping_labels_for_value_status
 bt_field_class_enumeration_signed_get_mapping_labels_for_value(
                const struct bt_field_class *fc, int64_t value,
@@ -444,11 +594,13 @@ bt_field_class_enumeration_signed_get_mapping_labels_for_value(
        const struct bt_field_class_enumeration *enum_fc = (const void *) fc;
        uint64_t i;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_NON_NULL(label_array, "Label array (output)");
-       BT_ASSERT_PRE_DEV_NON_NULL(count, "Count (output)");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION,
-               "Field class");
+       BT_ASSERT_PRE_DEV_NO_ERROR();
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_NON_NULL("label-array-output", label_array,
+               "Label array (output)");
+       BT_ASSERT_PRE_DEV_NON_NULL("count-output", count, "Count (output)");
+       BT_ASSERT_PRE_DEV_FC_HAS_TYPE("field-class", fc, "signed-enumeration",
+               BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION, "Field class");
        g_ptr_array_set_size(enum_fc->label_buf, 0);
 
        for (i = 0; i < enum_fc->mappings->len; i++) {
@@ -503,18 +655,22 @@ end:
 static inline
 enum bt_field_class_enumeration_add_mapping_status
 add_mapping_to_enumeration_field_class(struct bt_field_class *fc,
-               const char *label, const struct bt_integer_range_set *range_set)
+               const char *label, const struct bt_integer_range_set *range_set,
+               const char *api_func)
 {
        enum bt_field_class_enumeration_add_mapping_status status =
                BT_FUNC_STATUS_OK;
        struct bt_field_class_enumeration *enum_fc = (void *) fc;
        struct bt_field_class_enumeration_mapping mapping = { 0 };
 
+       BT_ASSERT_PRE_NO_ERROR_FROM_FUNC(api_func);
        BT_ASSERT(fc);
-       BT_ASSERT_PRE_NON_NULL(label, "Label");
-       BT_ASSERT_PRE_NON_NULL(range_set, "Integer range set");
-       BT_ASSERT_PRE(!enumeration_field_class_has_mapping_with_label(
-               enum_fc, label),
+       BT_ASSERT_PRE_NON_NULL_FROM_FUNC(api_func, "label", label, "Label");
+       BT_ASSERT_PRE_INT_RANGE_SET_NON_NULL_FROM_FUNC(api_func, range_set);
+       BT_ASSERT_PRE_FROM_FUNC(api_func,
+               "enumeration-field-class-mapping-label-is-unique",
+               !enumeration_field_class_has_mapping_with_label(
+                       enum_fc, label),
                "Duplicate mapping name in enumeration field class: "
                "%![enum-fc-]+F, label=\"%s\"", fc, label);
        mapping.range_set = range_set;
@@ -534,28 +690,34 @@ end:
        return status;
 }
 
+BT_EXPORT
 enum bt_field_class_enumeration_add_mapping_status
 bt_field_class_enumeration_unsigned_add_mapping(
                struct bt_field_class *fc, const char *label,
                const struct bt_integer_range_set_unsigned *range_set)
 {
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION,
-               "Field class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "unsigned-enumeration-field-class",
+               BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION, "Field class");
        return add_mapping_to_enumeration_field_class(fc, label,
-               (const void *) range_set);
+               (const void *) range_set, __func__);
 }
 
+BT_EXPORT
 enum bt_field_class_enumeration_add_mapping_status
 bt_field_class_enumeration_signed_add_mapping(
                struct bt_field_class *fc, const char *label,
                const struct bt_integer_range_set_signed *range_set)
 {
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION,
-               "Field class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "signed-enumeration-field-class",
+               BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION, "Field class");
        return add_mapping_to_enumeration_field_class(fc, label,
-               (const void *) range_set);
+               (const void *) range_set, __func__);
 }
 
 static
@@ -563,23 +725,29 @@ void destroy_real_field_class(struct bt_object *obj)
 {
        BT_ASSERT(obj);
        BT_LIB_LOGD("Destroying real field class object: %!+F", obj);
+       finalize_field_class((void *) obj);
        g_free(obj);
 }
 
-struct bt_field_class *bt_field_class_real_create(bt_trace_class *trace_class)
+static
+struct bt_field_class *create_real_field_class(bt_trace_class *trace_class,
+               enum bt_field_class_type type)
 {
        struct bt_field_class_real *real_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
-       BT_LOGD_STR("Creating default real field class object.");
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
+       BT_LOGD("Creating default real field class object: type=%s",
+               bt_common_field_class_type_string(type));
        real_fc = g_new0(struct bt_field_class_real, 1);
        if (!real_fc) {
                BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one real field class.");
                goto error;
        }
 
-       init_field_class((void *) real_fc, BT_FIELD_CLASS_TYPE_REAL,
-               destroy_real_field_class);
+       if (init_field_class((void *) real_fc, type, destroy_real_field_class)) {
+               goto error;
+       }
+
        BT_LIB_LOGD("Created real field class object: %!+F", real_fc);
        goto end;
 
@@ -590,26 +758,24 @@ end:
        return (void *) real_fc;
 }
 
-bt_bool bt_field_class_real_is_single_precision(const struct bt_field_class *fc)
+BT_EXPORT
+struct bt_field_class *bt_field_class_real_single_precision_create(
+       bt_trace_class *trace_class)
 {
-       const struct bt_field_class_real *real_fc = (const void *) fc;
+       BT_ASSERT_PRE_NO_ERROR();
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_REAL, "Field class");
-       return real_fc->is_single_precision;
+       return create_real_field_class(trace_class,
+               BT_FIELD_CLASS_TYPE_SINGLE_PRECISION_REAL);
 }
 
-void bt_field_class_real_set_is_single_precision(struct bt_field_class *fc,
-               bt_bool is_single_precision)
+BT_EXPORT
+struct bt_field_class *bt_field_class_real_double_precision_create(
+       bt_trace_class *trace_class)
 {
-       struct bt_field_class_real *real_fc = (void *) fc;
+       BT_ASSERT_PRE_NO_ERROR();
 
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_REAL, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HOT(fc, "Field class");
-       real_fc->is_single_precision = (bool) is_single_precision;
-       BT_LIB_LOGD("Set real field class's \"is single precision\" property: "
-               "%!+F", fc);
+       return create_real_field_class(trace_class,
+               BT_FIELD_CLASS_TYPE_DOUBLE_PRECISION_REAL);
 }
 
 static
@@ -621,7 +787,11 @@ int init_named_field_classes_container(
 {
        int ret = 0;
 
-       init_field_class((void *) fc, type, fc_release_func);
+       ret = init_field_class((void *) fc, type, fc_release_func);
+       if (ret) {
+               goto end;
+       }
+
        fc->named_fcs = g_ptr_array_new_with_free_func(named_fc_destroy_func);
        if (!fc->named_fcs) {
                BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate a GPtrArray.");
@@ -648,6 +818,7 @@ void finalize_named_field_class(struct bt_named_field_class *named_fc)
                "addr=%p, name=\"%s\", %![fc-]+F",
                named_fc, named_fc->name ? named_fc->name->str : NULL,
                named_fc->fc);
+       BT_OBJECT_PUT_REF_AND_RESET(named_fc->user_attributes);
 
        if (named_fc->name) {
                g_string_free(named_fc->name, TRUE);
@@ -661,16 +832,19 @@ void finalize_named_field_class(struct bt_named_field_class *named_fc)
 static
 void destroy_named_field_class(gpointer ptr)
 {
+       struct bt_named_field_class *named_fc = ptr;
+
        if (ptr) {
+               BT_OBJECT_PUT_REF_AND_RESET(named_fc->user_attributes);
                finalize_named_field_class(ptr);
                g_free(ptr);
        }
 }
 
 static
-void destroy_variant_with_selector_option(gpointer ptr)
+void destroy_variant_with_selector_field_option(gpointer ptr)
 {
-       struct bt_field_class_variant_with_selector_option *opt = ptr;
+       struct bt_field_class_variant_with_selector_field_option *opt = ptr;
 
        if (ptr) {
                finalize_named_field_class(&opt->common);
@@ -702,17 +876,20 @@ void destroy_structure_field_class(struct bt_object *obj)
 {
        BT_ASSERT(obj);
        BT_LIB_LOGD("Destroying structure field class object: %!+F", obj);
+       finalize_field_class((void *) obj);
        finalize_named_field_classes_container((void *) obj);
        g_free(obj);
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_structure_create(
                bt_trace_class *trace_class)
 {
        int ret;
        struct bt_field_class_structure *struct_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
        BT_LOGD_STR("Creating default structure field class object.");
        struct_fc = g_new0(struct bt_field_class_structure, 1);
        if (!struct_fc) {
@@ -755,9 +932,16 @@ int init_named_field_class(struct bt_named_field_class *named_fc,
                goto end;
        }
 
+       named_fc->user_attributes = bt_value_map_create();
+       if (!named_fc->user_attributes) {
+               BT_LIB_LOGE_APPEND_CAUSE(
+                       "Failed to create a map value object.");
+               status = BT_FUNC_STATUS_MEMORY_ERROR;
+               goto end;
+       }
+
        named_fc->fc = fc;
-       bt_object_get_no_null_check(named_fc->fc);
-       bt_named_field_class_freeze(named_fc);
+       bt_object_get_ref_no_null_check(named_fc->fc);
 
 end:
        return status;
@@ -792,13 +976,13 @@ end:
 }
 
 static
-struct bt_field_class_variant_with_selector_option *
-create_variant_with_selector_option(
+struct bt_field_class_variant_with_selector_field_option *
+create_variant_with_selector_field_option(
                const char *name, struct bt_field_class *fc,
                const struct bt_integer_range_set *range_set)
 {
-       struct bt_field_class_variant_with_selector_option *opt = g_new0(
-               struct bt_field_class_variant_with_selector_option, 1);
+       struct bt_field_class_variant_with_selector_field_option *opt = g_new0(
+               struct bt_field_class_variant_with_selector_field_option, 1);
 
        BT_ASSERT(range_set);
 
@@ -813,12 +997,12 @@ create_variant_with_selector_option(
        }
 
        opt->range_set = range_set;
-       bt_object_get_no_null_check(opt->range_set);
+       bt_object_get_ref_no_null_check(opt->range_set);
        bt_integer_range_set_freeze(range_set);
        goto end;
 
 error:
-       destroy_variant_with_selector_option(opt);
+       destroy_variant_with_selector_field_option(opt);
        opt = NULL;
 
 end:
@@ -828,22 +1012,32 @@ end:
 static
 int append_named_field_class_to_container_field_class(
                struct bt_field_class_named_field_class_container *container_fc,
-               struct bt_named_field_class *named_fc)
+               struct bt_named_field_class *named_fc, const char *api_func,
+               const char *unique_entry_precond_id)
 {
        BT_ASSERT(container_fc);
        BT_ASSERT(named_fc);
-       BT_ASSERT_PRE_DEV_FC_HOT(container_fc, "Field class");
-       BT_ASSERT_PRE(!bt_g_hash_table_contains(container_fc->name_to_index,
-               named_fc->name->str),
+       BT_ASSERT_PRE_DEV_FC_HOT_FROM_FUNC(api_func, container_fc);
+       BT_ASSERT_PRE_FROM_FUNC(api_func, unique_entry_precond_id,
+               !bt_g_hash_table_contains(container_fc->name_to_index,
+                       named_fc->name->str),
                "Duplicate member/option name in structure/variant field class: "
                "%![container-fc-]+F, name=\"%s\"", container_fc,
                named_fc->name->str);
+
+       /*
+        * Freeze the contained field class, but not the named field
+        * class itself, as it's still possible afterwards to modify
+        * properties of the member/option object.
+        */
+       bt_field_class_freeze(named_fc->fc);
        g_ptr_array_add(container_fc->named_fcs, named_fc);
        g_hash_table_insert(container_fc->name_to_index, named_fc->name->str,
                GUINT_TO_POINTER(container_fc->named_fcs->len - 1));
        return BT_FUNC_STATUS_OK;
 }
 
+BT_EXPORT
 enum bt_field_class_structure_append_member_status
 bt_field_class_structure_append_member(
                struct bt_field_class *fc, const char *name,
@@ -852,9 +1046,9 @@ bt_field_class_structure_append_member(
        enum bt_field_class_structure_append_member_status status;
        struct bt_named_field_class *named_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_STRUCTURE,
-               "Field class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_STRUCT("field-class", fc, "Field class");
        named_fc = create_named_field_class(name, member_fc);
        if (!named_fc) {
                /* create_named_field_class() logs errors */
@@ -863,7 +1057,8 @@ bt_field_class_structure_append_member(
        }
 
        status = append_named_field_class_to_container_field_class((void *) fc,
-               named_fc);
+               named_fc, __func__,
+               "structure-field-class-member-name-is-unique");
        if (status == BT_FUNC_STATUS_OK) {
                /* Moved to the container */
                named_fc = NULL;
@@ -873,14 +1068,14 @@ end:
        return status;
 }
 
+BT_EXPORT
 uint64_t bt_field_class_structure_get_member_count(
                const struct bt_field_class *fc)
 {
        struct bt_field_class_structure *struct_fc = (void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_STRUCTURE,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_STRUCT("field-class", fc, "Field class");
        return (uint64_t) struct_fc->common.named_fcs->len;
 }
 
@@ -888,49 +1083,50 @@ static
 struct bt_named_field_class *
 borrow_named_field_class_from_container_field_class_at_index(
                struct bt_field_class_named_field_class_container *fc,
-               uint64_t index)
+               uint64_t index, const char *api_func)
 {
-       BT_ASSERT(fc);
-       BT_ASSERT_PRE_DEV_VALID_INDEX(index, fc->named_fcs->len);
+       BT_ASSERT_DBG(fc);
+       BT_ASSERT_PRE_DEV_VALID_INDEX_FROM_FUNC(api_func, index,
+               fc->named_fcs->len);
        return fc->named_fcs->pdata[index];
 }
 
+BT_EXPORT
 const struct bt_field_class_structure_member *
 bt_field_class_structure_borrow_member_by_index_const(
                const struct bt_field_class *fc, uint64_t index)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_STRUCTURE,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_STRUCT("field-class", fc, "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_at_index(
-                       (void *) fc, index);
+                       (void *) fc, index, __func__);
 }
 
+BT_EXPORT
 struct bt_field_class_structure_member *
 bt_field_class_structure_borrow_member_by_index(
                struct bt_field_class *fc, uint64_t index)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_STRUCTURE,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_STRUCT("field-class", fc, "Field class");
        return (void *)
                borrow_named_field_class_from_container_field_class_at_index(
-                       (void *) fc, index);
+                       (void *) fc, index, __func__);
 }
 
 static
 struct bt_named_field_class *
 borrow_named_field_class_from_container_field_class_by_name(
                struct bt_field_class_named_field_class_container *fc,
-               const char *name)
+               const char *name, const char *api_func)
 {
        struct bt_named_field_class *named_fc = NULL;
        gpointer orig_key;
        gpointer value;
 
-       BT_ASSERT(fc);
-       BT_ASSERT_PRE_DEV_NON_NULL(name, "Name");
+       BT_ASSERT_DBG(fc);
+       BT_ASSERT_PRE_DEV_NAME_NON_NULL_FROM_FUNC(api_func, name);
        if (!g_hash_table_lookup_extended(fc->name_to_index, name, &orig_key,
                        &value)) {
                goto end;
@@ -942,54 +1138,362 @@ end:
        return named_fc;
 }
 
+BT_EXPORT
 const struct bt_field_class_structure_member *
 bt_field_class_structure_borrow_member_by_name_const(
                const struct bt_field_class *fc, const char *name)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_STRUCTURE,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_STRUCT("field-class", fc, "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_by_name(
-                       (void *) fc, name);
+                       (void *) fc, name, __func__);
 }
 
+BT_EXPORT
 struct bt_field_class_structure_member *
 bt_field_class_structure_borrow_member_by_name(
                struct bt_field_class *fc, const char *name)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_STRUCTURE,
-               "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_STRUCT("field-class", fc, "Field class");
        return (void *)
                borrow_named_field_class_from_container_field_class_by_name(
-                       (void *) fc, name);
+                       (void *) fc, name, __func__);
 }
 
+BT_EXPORT
 const char *bt_field_class_structure_member_get_name(
                const struct bt_field_class_structure_member *member)
 {
        const struct bt_named_field_class *named_fc = (const void *) member;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(member, "Structure field class member");
+       BT_ASSERT_PRE_DEV_STRUCT_FC_MEMBER_NON_NULL(member);
        return named_fc->name->str;
 }
 
+BT_EXPORT
 const struct bt_field_class *
 bt_field_class_structure_member_borrow_field_class_const(
                const struct bt_field_class_structure_member *member)
 {
        const struct bt_named_field_class *named_fc = (const void *) member;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(member, "Structure field class member");
+       BT_ASSERT_PRE_DEV_STRUCT_FC_MEMBER_NON_NULL(member);
+       return named_fc->fc;
+}
+
+BT_EXPORT
+struct bt_field_class *
+bt_field_class_structure_member_borrow_field_class(
+               struct bt_field_class_structure_member *member)
+{
+       struct bt_named_field_class *named_fc = (void *) member;
+
+       BT_ASSERT_PRE_DEV_STRUCT_FC_MEMBER_NON_NULL(member);
        return named_fc->fc;
 }
 
+static
+void destroy_option_field_class(struct bt_object *obj)
+{
+       struct bt_field_class_option *fc = (void *) obj;
+
+       BT_ASSERT(fc);
+       BT_LIB_LOGD("Destroying option field class object: %!+F", fc);
+       finalize_field_class((void *) obj);
+       BT_LOGD_STR("Putting content field class.");
+       BT_OBJECT_PUT_REF_AND_RESET(fc->content_fc);
+
+       if (fc->common.type != BT_FIELD_CLASS_TYPE_OPTION_WITHOUT_SELECTOR_FIELD) {
+               struct bt_field_class_option_with_selector_field *with_sel_fc =
+                       (void *) obj;
+
+               BT_LOGD_STR("Putting selector field path.");
+               BT_OBJECT_PUT_REF_AND_RESET(with_sel_fc->selector_field_path);
+               BT_LOGD_STR("Putting selector field class.");
+               BT_OBJECT_PUT_REF_AND_RESET(with_sel_fc->selector_fc);
+
+               if (fc->common.type != BT_FIELD_CLASS_TYPE_OPTION_WITH_BOOL_SELECTOR_FIELD) {
+                       struct bt_field_class_option_with_selector_field_integer *with_int_sel_fc =
+                               (void *) obj;
+
+                       BT_LOGD_STR("Putting integer range set.");
+                       BT_OBJECT_PUT_REF_AND_RESET(with_int_sel_fc->range_set);
+               }
+       }
+
+       g_free(fc);
+}
+
+static
+struct bt_field_class *create_option_field_class(
+               struct bt_trace_class *trace_class,
+               enum bt_field_class_type fc_type,
+               struct bt_field_class *content_fc,
+               struct bt_field_class *selector_fc,
+               const char *api_func)
+{
+       struct bt_field_class_option *opt_fc = NULL;
+
+       BT_ASSERT_PRE_NO_ERROR_FROM_FUNC(api_func);
+       BT_ASSERT_PRE_TC_NON_NULL_FROM_FUNC(api_func, trace_class);
+       BT_ASSERT_PRE_NON_NULL_FROM_FUNC(api_func, "content-field-class",
+               content_fc, "Content field class");
+       BT_LIB_LOGD("Creating option field class: "
+               "type=%s, %![content-fc-]+F, %![sel-fc-]+F",
+               bt_common_field_class_type_string(fc_type),
+               content_fc, selector_fc);
+
+       if (fc_type != BT_FIELD_CLASS_TYPE_OPTION_WITHOUT_SELECTOR_FIELD) {
+               struct bt_field_class_option_with_selector_field *opt_with_sel_fc = NULL;
+
+               BT_ASSERT_PRE_NON_NULL_FROM_FUNC(api_func,
+                       "selector-field-class", selector_fc,
+                       "Selector field class");
+
+               if (fc_type == BT_FIELD_CLASS_TYPE_OPTION_WITH_BOOL_SELECTOR_FIELD) {
+                       BT_ASSERT_PRE_FC_HAS_TYPE_FROM_FUNC(api_func,
+                               "selector-field-class", selector_fc,
+                               "boolean-field-class", BT_FIELD_CLASS_TYPE_BOOL,
+                               "Selector field class");
+                       opt_with_sel_fc = (void *) g_new0(
+                               struct bt_field_class_option_with_selector_field_bool, 1);
+               } else {
+                       BT_ASSERT_PRE_FC_IS_INT_FROM_FUNC(api_func,
+                               "selector-field-class",
+                               selector_fc, "Selector field class");
+                       opt_with_sel_fc = (void *) g_new0(
+                               struct bt_field_class_option_with_selector_field_integer, 1);
+               }
+
+               if (!opt_with_sel_fc) {
+                       BT_LIB_LOGE_APPEND_CAUSE(
+                               "Failed to allocate one option with selector field class.");
+                       goto error;
+               }
+
+               opt_with_sel_fc->selector_fc = selector_fc;
+               bt_object_get_ref_no_null_check(opt_with_sel_fc->selector_fc);
+               opt_fc = (void *) opt_with_sel_fc;
+       } else {
+               opt_fc = g_new0(struct bt_field_class_option, 1);
+               if (!opt_fc) {
+                       BT_LIB_LOGE_APPEND_CAUSE(
+                               "Failed to allocate one option field class.");
+                       goto error;
+               }
+       }
+
+       BT_ASSERT(opt_fc);
+
+       if (init_field_class((void *) opt_fc, fc_type,
+                       destroy_option_field_class)) {
+               goto error;
+       }
+
+       opt_fc->content_fc = content_fc;
+       bt_object_get_ref_no_null_check(opt_fc->content_fc);
+       bt_field_class_freeze(opt_fc->content_fc);
+
+       if (selector_fc) {
+               bt_field_class_freeze(selector_fc);
+       }
+
+       BT_LIB_LOGD("Created option field class object: "
+               "%![opt-fc-]+F, %![sel-fc-]+F", opt_fc, selector_fc);
+       goto end;
+
+error:
+       BT_OBJECT_PUT_REF_AND_RESET(opt_fc);
+
+end:
+       return (void *) opt_fc;
+}
+
+BT_EXPORT
+struct bt_field_class *bt_field_class_option_without_selector_create(
+               struct bt_trace_class *trace_class,
+               struct bt_field_class *content_fc)
+{
+       return create_option_field_class(trace_class,
+               BT_FIELD_CLASS_TYPE_OPTION_WITHOUT_SELECTOR_FIELD,
+               content_fc, NULL, __func__);
+}
+
+BT_EXPORT
+struct bt_field_class *bt_field_class_option_with_selector_field_bool_create(
+               struct bt_trace_class *trace_class,
+               struct bt_field_class *content_fc,
+               struct bt_field_class *selector_fc)
+{
+       BT_ASSERT_PRE_NO_ERROR();
+
+       return create_option_field_class(trace_class,
+               BT_FIELD_CLASS_TYPE_OPTION_WITH_BOOL_SELECTOR_FIELD,
+               content_fc, selector_fc, __func__);
+}
+
+BT_EXPORT
+struct bt_field_class *
+bt_field_class_option_with_selector_field_integer_unsigned_create(
+               struct bt_trace_class *trace_class,
+               struct bt_field_class *content_fc,
+               struct bt_field_class *selector_fc,
+               const struct bt_integer_range_set_unsigned *u_range_set)
+{
+       struct bt_field_class_option_with_selector_field_integer *fc;
+       const struct bt_integer_range_set *range_set =
+               (const void *) u_range_set;
+
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_INT_RANGE_SET_NON_NULL(range_set);
+       BT_ASSERT_PRE_INT_RANGE_SET_NOT_EMPTY(range_set);
+       fc = (void *) create_option_field_class(trace_class,
+               BT_FIELD_CLASS_TYPE_OPTION_WITH_UNSIGNED_INTEGER_SELECTOR_FIELD,
+               content_fc, selector_fc, __func__);
+
+       if (!fc) {
+               goto end;
+       }
+
+       fc->range_set = range_set;
+       bt_object_get_ref_no_null_check(fc->range_set);
+       bt_integer_range_set_freeze(range_set);
+
+end:
+       return (void *) fc;
+}
+
+BT_EXPORT
+struct bt_field_class *
+bt_field_class_option_with_selector_field_integer_signed_create(
+               struct bt_trace_class *trace_class,
+               struct bt_field_class *content_fc,
+               struct bt_field_class *selector_fc,
+               const struct bt_integer_range_set_signed *i_range_set)
+{
+       struct bt_field_class_option_with_selector_field_integer *fc;
+       const struct bt_integer_range_set *range_set =
+               (const void *) i_range_set;
+
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_INT_RANGE_SET_NON_NULL(range_set);
+       BT_ASSERT_PRE_INT_RANGE_SET_NOT_EMPTY(range_set);
+       fc = (void *) create_option_field_class(trace_class,
+               BT_FIELD_CLASS_TYPE_OPTION_WITH_SIGNED_INTEGER_SELECTOR_FIELD,
+               content_fc, selector_fc, __func__);
+
+       if (!fc) {
+               goto end;
+       }
+
+       fc->range_set = range_set;
+       bt_object_get_ref_no_null_check(fc->range_set);
+       bt_integer_range_set_freeze(range_set);
+
+end:
+       return (void *) fc;
+}
+
+BT_EXPORT
+const struct bt_field_class *bt_field_class_option_borrow_field_class_const(
+                       const struct bt_field_class *fc)
+{
+       struct bt_field_class_option *opt_fc = (void *) fc;
+
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_OPTION("field-class", fc, "Field class");
+       return opt_fc->content_fc;
+}
+
+BT_EXPORT
+struct bt_field_class *bt_field_class_option_borrow_field_class(
+                       struct bt_field_class *fc)
+{
+       struct bt_field_class_option *opt_fc = (void *) fc;
+
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_OPTION("field-class", fc, "Field class");
+       return opt_fc->content_fc;
+}
+
+BT_EXPORT
+const struct bt_field_path *
+bt_field_class_option_with_selector_field_borrow_selector_field_path_const(
+               const struct bt_field_class *fc)
+{
+       const struct bt_field_class_option_with_selector_field *opt_fc =
+               (const void *) fc;
+
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_OPTION_WITH_SEL("field-class", fc, "Field class");
+       return opt_fc->selector_field_path;
+}
+
+BT_EXPORT
+void bt_field_class_option_with_selector_field_bool_set_selector_is_reversed(
+               struct bt_field_class *fc, bt_bool sel_is_reversed)
+{
+       struct bt_field_class_option_with_selector_field_bool *opt_fc = (void *) fc;
+
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "option-field-class-with-boolean-selector-field",
+               BT_FIELD_CLASS_TYPE_OPTION_WITH_BOOL_SELECTOR_FIELD,
+               "Field class");
+       BT_ASSERT_PRE_DEV_FC_HOT(fc);
+       opt_fc->sel_is_reversed = sel_is_reversed;
+}
+
+BT_EXPORT
+bt_bool bt_field_class_option_with_selector_field_bool_selector_is_reversed(
+               const struct bt_field_class *fc)
+{
+       struct bt_field_class_option_with_selector_field_bool *opt_fc = (void *) fc;
+
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "option-field-class-with-boolean-selector-field",
+               BT_FIELD_CLASS_TYPE_OPTION_WITH_BOOL_SELECTOR_FIELD,
+               "Field class");
+       return opt_fc->sel_is_reversed;
+}
+
+BT_EXPORT
+const struct bt_integer_range_set_unsigned *
+bt_field_class_option_with_selector_field_integer_unsigned_borrow_selector_ranges_const(
+               const struct bt_field_class *fc)
+{
+       struct bt_field_class_option_with_selector_field_integer *opt_fc =
+               (void *) fc;
+
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_OPTION_WITH_INT_SEL("field-class", fc,
+               "Field class");
+       return (const void *) opt_fc->range_set;
+}
+
+BT_EXPORT
+const struct bt_integer_range_set_signed *
+bt_field_class_option_with_selector_field_integer_signed_borrow_selector_ranges_const(
+               const struct bt_field_class *fc)
+{
+       struct bt_field_class_option_with_selector_field_integer *opt_fc =
+               (void *) fc;
+
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_IS_OPTION_WITH_INT_SEL("field-class", fc,
+               "Field class");
+       return (const void *) opt_fc->range_set;
+}
+
 static
 void finalize_variant_field_class(struct bt_field_class_variant *var_fc)
 {
        BT_ASSERT(var_fc);
        BT_LIB_LOGD("Finalizing variant field class object: %!+F", var_fc);
+       finalize_field_class((void *) var_fc);
        finalize_named_field_classes_container((void *) var_fc);
 }
 
@@ -1004,9 +1508,9 @@ void destroy_variant_field_class(struct bt_object *obj)
 }
 
 static
-void destroy_variant_with_selector_field_class(struct bt_object *obj)
+void destroy_variant_with_selector_field_field_class(struct bt_object *obj)
 {
-       struct bt_field_class_variant_with_selector *fc = (void *) obj;
+       struct bt_field_class_variant_with_selector_field *fc = (void *) obj;
 
        BT_ASSERT(fc);
        finalize_variant_field_class(&fc->common);
@@ -1017,18 +1521,21 @@ void destroy_variant_with_selector_field_class(struct bt_object *obj)
        g_free(fc);
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_variant_create(
                bt_trace_class *trace_class, bt_field_class *selector_fc)
 {
        int ret;
        struct bt_field_class_variant *var_fc = NULL;
-       struct bt_field_class_variant_with_selector *var_with_sel_fc = NULL;
+       struct bt_field_class_variant_with_selector_field *var_with_sel_fc = NULL;
        enum bt_field_class_type fc_type;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
 
        if (selector_fc) {
-               BT_ASSERT_PRE_FC_IS_INT(selector_fc, "Selector field class");
+               BT_ASSERT_PRE_FC_IS_INT("selector-field-class", selector_fc,
+                       "Selector field class");
        }
 
        BT_LIB_LOGD("Creating default variant field class: %![sel-fc-]+F",
@@ -1036,33 +1543,35 @@ struct bt_field_class *bt_field_class_variant_create(
 
        if (selector_fc) {
                var_with_sel_fc = g_new0(
-                       struct bt_field_class_variant_with_selector, 1);
+                       struct bt_field_class_variant_with_selector_field, 1);
                if (!var_with_sel_fc) {
                        BT_LIB_LOGE_APPEND_CAUSE(
                                "Failed to allocate one variant field class with selector.");
                        goto error;
                }
 
-               if (selector_fc->type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER ||
-                               selector_fc->type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION) {
-                       fc_type = BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR;
+               if (bt_field_class_type_is(selector_fc->type,
+                               BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER)) {
+                       fc_type = BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_INTEGER_SELECTOR_FIELD;
                } else {
-                       fc_type = BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR;
+                       fc_type = BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_INTEGER_SELECTOR_FIELD;
                }
 
                ret = init_named_field_classes_container(
                        (void *) var_with_sel_fc, fc_type,
-                       destroy_variant_with_selector_field_class,
-                       destroy_variant_with_selector_option);
+                       destroy_variant_with_selector_field_field_class,
+                       destroy_variant_with_selector_field_option);
                if (ret) {
                        /* init_named_field_classes_container() logs errors */
                        goto error;
                }
 
                var_with_sel_fc->selector_fc = selector_fc;
-               bt_object_get_no_null_check(var_with_sel_fc->selector_fc);
+               bt_object_get_ref_no_null_check(var_with_sel_fc->selector_fc);
                bt_field_class_freeze(selector_fc);
                var_fc = (void *) var_with_sel_fc;
+               BT_LIB_LOGD("Created default variant field class with selector object: "
+                       "%![var-fc-]+F, %![sel-fc-]+F", var_fc, selector_fc);
        } else {
                var_fc = g_new0(struct bt_field_class_variant, 1);
                if (!var_fc) {
@@ -1072,26 +1581,31 @@ struct bt_field_class *bt_field_class_variant_create(
                }
 
                ret = init_named_field_classes_container((void *) var_fc,
-                       BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR,
+                       BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR_FIELD,
                        destroy_variant_field_class, destroy_named_field_class);
                if (ret) {
                        /* init_named_field_classes_container() logs errors */
                        goto error;
                }
+               BT_LIB_LOGD("Created default variant field class without selector object: "
+                       "%![var-fc-]+F", var_fc);
        }
 
        BT_ASSERT(var_fc);
-       BT_LIB_LOGD("Created default variant field class with selector object: "
-               "%![var-fc-]+F, %![sel-fc-]+F", var_fc, selector_fc);
        goto end;
 
 error:
        BT_OBJECT_PUT_REF_AND_RESET(var_fc);
+       BT_OBJECT_PUT_REF_AND_RESET(var_with_sel_fc);
 
 end:
        return (void *) var_fc;
 }
 
+#define VAR_FC_OPT_NAME_IS_UNIQUE_ID                                   \
+       "variant-field-class-option-name-is-unique"
+
+BT_EXPORT
 enum bt_field_class_variant_without_selector_append_option_status
 bt_field_class_variant_without_selector_append_option(struct bt_field_class *fc,
                const char *name, struct bt_field_class *option_fc)
@@ -1099,11 +1613,15 @@ bt_field_class_variant_without_selector_append_option(struct bt_field_class *fc,
        enum bt_field_class_variant_without_selector_append_option_status status;
        struct bt_named_field_class *named_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_NON_NULL(name, "Name");
-       BT_ASSERT_PRE_NON_NULL(option_fc, "Option field class");
-       BT_ASSERT_PRE_FC_HAS_ID(fc,
-               BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR, "Field class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_NAME_NON_NULL(name);
+       BT_ASSERT_PRE_NON_NULL("option-field-class", option_fc,
+               "Option field class");
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "variant-field-class-without-selector-field",
+               BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR_FIELD,
+               "Field class");
        named_fc = create_named_field_class(name, option_fc);
        if (!named_fc) {
                /* create_named_field_class() logs errors */
@@ -1112,7 +1630,7 @@ bt_field_class_variant_without_selector_append_option(struct bt_field_class *fc,
        }
 
        status = append_named_field_class_to_container_field_class((void *) fc,
-               named_fc);
+               named_fc, __func__, VAR_FC_OPT_NAME_IS_UNIQUE_ID);
        if (status == BT_FUNC_STATUS_OK) {
                /* Moved to the container */
                named_fc = NULL;
@@ -1154,7 +1672,7 @@ int ranges_overlap(GPtrArray *var_fc_opts, const struct bt_integer_range_set *ra
 
        /* Add existing option ranges */
        for (i = 0; i < var_fc_opts->len; i++) {
-               struct bt_field_class_variant_with_selector_option *opt =
+               struct bt_field_class_variant_with_selector_field_option *opt =
                        var_fc_opts->pdata[i];
                uint64_t j;
 
@@ -1212,44 +1730,45 @@ end:
 }
 
 static
-int append_option_to_variant_with_selector_field_class(
+int append_option_to_variant_with_selector_field_field_class(
                struct bt_field_class *fc, const char *name,
                struct bt_field_class *option_fc,
                const struct bt_integer_range_set *range_set,
-               enum bt_field_class_type expected_type)
+               enum bt_field_class_type expected_type,
+               const char *api_func)
 {
        int status;
-       struct bt_field_class_variant_with_selector *var_fc = (void *) fc;
-       struct bt_field_class_variant_with_selector_option *opt = NULL;
+       struct bt_field_class_variant_with_selector_field *var_fc = (void *) fc;
+       struct bt_field_class_variant_with_selector_field_option *opt = NULL;
        bool has_overlap;
 
-       BT_ASSERT_PRE_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_NON_NULL(name, "Name");
-       BT_ASSERT_PRE_NON_NULL(option_fc, "Option field class");
-       BT_ASSERT_PRE_NON_NULL(range_set, "Integer range set");
-       BT_ASSERT_PRE_FC_HAS_ID(fc, expected_type, "Field class");
-       BT_ASSERT_PRE(range_set->ranges->len > 0,
-               "Integer range set is empty: %!+R", range_set);
+       BT_ASSERT(fc);
+       BT_ASSERT_PRE_NAME_NON_NULL_FROM_FUNC(api_func, name);
+       BT_ASSERT_PRE_NON_NULL_FROM_FUNC(api_func, "option-field-class",
+               option_fc, "Option field class");
+       BT_ASSERT_PRE_INT_RANGE_SET_NON_NULL_FROM_FUNC(api_func, range_set);
+       BT_ASSERT_PRE_INT_RANGE_SET_NOT_EMPTY_FROM_FUNC(api_func, range_set);
        status = ranges_overlap(var_fc->common.common.named_fcs, range_set,
-               expected_type == BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR,
+               expected_type == BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_INTEGER_SELECTOR_FIELD,
                &has_overlap);
        if (status) {
                /* ranges_overlap() logs errors */
                goto end;
        }
 
-       BT_ASSERT_PRE(!has_overlap,
+       BT_ASSERT_PRE_FROM_FUNC(api_func, "ranges-do-not-overlap",
+               !has_overlap,
                "Integer range set's ranges and existing ranges have an overlap: "
                "%!+R", range_set);
-       opt = create_variant_with_selector_option(name, option_fc, range_set);
+       opt = create_variant_with_selector_field_option(name, option_fc, range_set);
        if (!opt) {
-               /* create_variant_with_selector_option() logs errors */
+               /* create_variant_with_selector_field_option() logs errors */
                status = BT_FUNC_STATUS_MEMORY_ERROR;
                goto end;
        }
 
        status = append_named_field_class_to_container_field_class((void *) fc,
-               &opt->common);
+               &opt->common, __func__, VAR_FC_OPT_NAME_IS_UNIQUE_ID);
        if (status == BT_FUNC_STATUS_OK) {
                /* Moved to the container */
                opt = NULL;
@@ -1257,180 +1776,257 @@ int append_option_to_variant_with_selector_field_class(
 
 end:
        if (opt) {
-               destroy_variant_with_selector_option(opt);
+               destroy_variant_with_selector_field_option(opt);
        }
 
        return status;
 }
 
-enum bt_field_class_variant_with_selector_append_option_status
-bt_field_class_variant_with_selector_unsigned_append_option(
+BT_EXPORT
+enum bt_field_class_variant_with_selector_field_integer_append_option_status
+bt_field_class_variant_with_selector_field_integer_unsigned_append_option(
                struct bt_field_class *fc, const char *name,
                struct bt_field_class *option_fc,
                const struct bt_integer_range_set_unsigned *range_set)
 {
-       return append_option_to_variant_with_selector_field_class(fc,
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "variant-field-class-with-unsigned-integer-selector-field",
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_INTEGER_SELECTOR_FIELD,
+               "Field class");
+       return append_option_to_variant_with_selector_field_field_class(fc,
                name, option_fc, (const void *) range_set,
-               BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR);
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_INTEGER_SELECTOR_FIELD,
+               __func__);
 }
 
-enum bt_field_class_variant_with_selector_append_option_status
-bt_field_class_variant_with_selector_signed_append_option(
+BT_EXPORT
+enum bt_field_class_variant_with_selector_field_integer_append_option_status
+bt_field_class_variant_with_selector_field_integer_signed_append_option(
                struct bt_field_class *fc, const char *name,
                struct bt_field_class *option_fc,
                const struct bt_integer_range_set_signed *range_set)
 {
-       return append_option_to_variant_with_selector_field_class(fc,
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "variant-field-class-with-signed-integer-selector-field",
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_INTEGER_SELECTOR_FIELD,
+               "Field class");
+       return append_option_to_variant_with_selector_field_field_class(fc,
                name, option_fc, (const void *) range_set,
-               BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR);
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_INTEGER_SELECTOR_FIELD,
+               __func__);
 }
 
+BT_EXPORT
 uint64_t bt_field_class_variant_get_option_count(const struct bt_field_class *fc)
 {
        const struct bt_field_class_variant *var_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_VARIANT(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_VARIANT("field-class", fc, "Field class");
        return (uint64_t) var_fc->common.named_fcs->len;
 }
 
+BT_EXPORT
 const struct bt_field_class_variant_option *
 bt_field_class_variant_borrow_option_by_name_const(
                const struct bt_field_class *fc, const char *name)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_VARIANT(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_VARIANT("field-class", fc, "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_by_name(
-                       (void *) fc, name);
+                       (void *) fc, name, __func__);
 }
 
+BT_EXPORT
 const struct bt_field_class_variant_option *
 bt_field_class_variant_borrow_option_by_index_const(
                const struct bt_field_class *fc, uint64_t index)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_VARIANT(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_VARIANT("field-class", fc, "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_at_index(
-                       (void *) fc, index);
+                       (void *) fc, index, __func__);
 }
 
-const struct bt_field_class_variant_with_selector_unsigned_option *
-bt_field_class_variant_with_selector_unsigned_borrow_option_by_name_const(
+BT_EXPORT
+struct bt_field_class_variant_option *
+bt_field_class_variant_borrow_option_by_name(
+               struct bt_field_class *fc, const char *name)
+{
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_VARIANT("field-class", fc, "Field class");
+       return (void *)
+               borrow_named_field_class_from_container_field_class_by_name(
+                       (void *) fc, name, __func__);
+}
+
+BT_EXPORT
+struct bt_field_class_variant_option *
+bt_field_class_variant_borrow_option_by_index(
+               struct bt_field_class *fc, uint64_t index)
+{
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_VARIANT("field-class", fc, "Field class");
+       return (void *)
+               borrow_named_field_class_from_container_field_class_at_index(
+                       (void *) fc, index, __func__);
+}
+
+BT_EXPORT
+const struct bt_field_class_variant_with_selector_field_integer_unsigned_option *
+bt_field_class_variant_with_selector_field_integer_unsigned_borrow_option_by_name_const(
                const struct bt_field_class *fc, const char *name)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc,
-               BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR,
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "variant-field-class-with-unsigned-integer-selector-field",
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_INTEGER_SELECTOR_FIELD,
                "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_by_name(
-                       (void *) fc, name);
+                       (void *) fc, name, __func__);
 }
 
-const struct bt_field_class_variant_with_selector_unsigned_option *
-bt_field_class_variant_with_selector_unsigned_borrow_option_by_index_const(
+BT_EXPORT
+const struct bt_field_class_variant_with_selector_field_integer_unsigned_option *
+bt_field_class_variant_with_selector_field_integer_unsigned_borrow_option_by_index_const(
                const struct bt_field_class *fc, uint64_t index)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc,
-               BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR,
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "variant-field-class-with-unsigned-integer-selector-field",
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_INTEGER_SELECTOR_FIELD,
                "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_at_index(
-                       (void *) fc, index);
+                       (void *) fc, index, __func__);
 }
 
-const struct bt_field_class_variant_with_selector_signed_option *
-bt_field_class_variant_with_selector_signed_borrow_option_by_name_const(
+BT_EXPORT
+const struct bt_field_class_variant_with_selector_field_integer_signed_option *
+bt_field_class_variant_with_selector_field_integer_signed_borrow_option_by_name_const(
                const struct bt_field_class *fc, const char *name)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc,
-               BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR,
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "variant-field-class-with-signed-integer-selector-field",
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_INTEGER_SELECTOR_FIELD,
                "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_by_name(
-                       (void *) fc, name);
+                       (void *) fc, name, __func__);
 }
 
-const struct bt_field_class_variant_with_selector_signed_option *
-bt_field_class_variant_with_selector_signed_borrow_option_by_index_const(
+BT_EXPORT
+const struct bt_field_class_variant_with_selector_field_integer_signed_option *
+bt_field_class_variant_with_selector_field_integer_signed_borrow_option_by_index_const(
                const struct bt_field_class *fc, uint64_t index)
 {
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc,
-               BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR,
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "variant-field-class-with-signed-integer-selector-field",
+               BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_INTEGER_SELECTOR_FIELD,
                "Field class");
        return (const void *)
                borrow_named_field_class_from_container_field_class_at_index(
-                       (void *) fc, index);
+                       (void *) fc, index, __func__);
 }
 
+BT_EXPORT
 const char *bt_field_class_variant_option_get_name(
                const struct bt_field_class_variant_option *option)
 {
        const struct bt_named_field_class *named_fc = (const void *) option;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(option, "Variant field class option");
+       BT_ASSERT_PRE_DEV_VAR_FC_OPT_NON_NULL(option);
        return named_fc->name->str;
 }
 
+BT_EXPORT
 const struct bt_field_class *
 bt_field_class_variant_option_borrow_field_class_const(
                const struct bt_field_class_variant_option *option)
 {
        const struct bt_named_field_class *named_fc = (const void *) option;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(option, "Variant field class option");
+       BT_ASSERT_PRE_DEV_VAR_FC_OPT_NON_NULL(option);
        return named_fc->fc;
 }
 
+BT_EXPORT
+struct bt_field_class *
+bt_field_class_variant_option_borrow_field_class(
+               struct bt_field_class_variant_option *option)
+{
+       struct bt_named_field_class *named_fc = (void *) option;
+
+       BT_ASSERT_PRE_DEV_VAR_FC_OPT_NON_NULL(option);
+       return named_fc->fc;
+}
+
+BT_EXPORT
 const struct bt_integer_range_set_unsigned *
-bt_field_class_variant_with_selector_unsigned_option_borrow_ranges_const(
-               const struct bt_field_class_variant_with_selector_unsigned_option *option)
+bt_field_class_variant_with_selector_field_integer_unsigned_option_borrow_ranges_const(
+               const struct bt_field_class_variant_with_selector_field_integer_unsigned_option *option)
 {
-       const struct bt_field_class_variant_with_selector_option *opt =
+       const struct bt_field_class_variant_with_selector_field_option *opt =
                (const void *) option;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(option, "Variant field class option");
+       BT_ASSERT_PRE_DEV_VAR_FC_OPT_NON_NULL(option);
        return (const void *) opt->range_set;
 }
 
+BT_EXPORT
 const struct bt_integer_range_set_signed *
-bt_field_class_variant_with_selector_signed_option_borrow_ranges_const(
-               const struct bt_field_class_variant_with_selector_signed_option *option)
+bt_field_class_variant_with_selector_field_integer_signed_option_borrow_ranges_const(
+               const struct bt_field_class_variant_with_selector_field_integer_signed_option *option)
 {
-       const struct bt_field_class_variant_with_selector_option *opt =
+       const struct bt_field_class_variant_with_selector_field_option *opt =
                (const void *) option;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(option, "Variant field class option");
+       BT_ASSERT_PRE_DEV_VAR_FC_OPT_NON_NULL(option);
        return (const void *) opt->range_set;
 }
 
+BT_EXPORT
 const struct bt_field_path *
-bt_field_class_variant_with_selector_borrow_selector_field_path_const(
+bt_field_class_variant_with_selector_field_borrow_selector_field_path_const(
                const struct bt_field_class *fc)
 {
-       const struct bt_field_class_variant_with_selector *var_fc =
+       const struct bt_field_class_variant_with_selector_field *var_fc =
                (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_VARIANT_WITH_SEL(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_VARIANT_WITH_SEL("field-class", fc,
+               "Field class");
        return var_fc->selector_field_path;
 }
 
 static
-void init_array_field_class(struct bt_field_class_array *fc,
+int init_array_field_class(struct bt_field_class_array *fc,
                enum bt_field_class_type type, bt_object_release_func release_func,
                struct bt_field_class *element_fc)
 {
+       int ret;
+
        BT_ASSERT(element_fc);
-       init_field_class((void *) fc, type, release_func);
+       ret = init_field_class((void *) fc, type, release_func);
+       if (ret) {
+               goto end;
+       }
+
        fc->element_fc = element_fc;
-       bt_object_get_no_null_check(fc->element_fc);
+       bt_object_get_ref_no_null_check(fc->element_fc);
        bt_field_class_freeze(element_fc);
+
+end:
+       return ret;
 }
 
 static
@@ -1438,6 +2034,7 @@ void finalize_array_field_class(struct bt_field_class_array *array_fc)
 {
        BT_ASSERT(array_fc);
        BT_LOGD_STR("Putting element field class.");
+       finalize_field_class((void *) array_fc);
        BT_OBJECT_PUT_REF_AND_RESET(array_fc->element_fc);
 }
 
@@ -1450,14 +2047,17 @@ void destroy_static_array_field_class(struct bt_object *obj)
        g_free(obj);
 }
 
+BT_EXPORT
 struct bt_field_class *
 bt_field_class_array_static_create(bt_trace_class *trace_class,
                struct bt_field_class *element_fc, uint64_t length)
 {
        struct bt_field_class_array_static *array_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
-       BT_ASSERT_PRE_NON_NULL(element_fc, "Element field class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
+       BT_ASSERT_PRE_NON_NULL("element-field-class", element_fc,
+               "Element field class");
        BT_LOGD_STR("Creating default static array field class object.");
        array_fc = g_new0(struct bt_field_class_array_static, 1);
        if (!array_fc) {
@@ -1466,8 +2066,12 @@ bt_field_class_array_static_create(bt_trace_class *trace_class,
                goto error;
        }
 
-       init_array_field_class((void *) array_fc, BT_FIELD_CLASS_TYPE_STATIC_ARRAY,
-               destroy_static_array_field_class, element_fc);
+       if (init_array_field_class((void *) array_fc,
+                       BT_FIELD_CLASS_TYPE_STATIC_ARRAY,
+                       destroy_static_array_field_class, element_fc)) {
+               goto error;
+       }
+
        array_fc->length = length;
        BT_LIB_LOGD("Created static array field class object: %!+F", array_fc);
        goto end;
@@ -1479,33 +2083,37 @@ end:
        return (void *) array_fc;
 }
 
+BT_EXPORT
 const struct bt_field_class *
 bt_field_class_array_borrow_element_field_class_const(
                const struct bt_field_class *fc)
 {
        const struct bt_field_class_array *array_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_ARRAY(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_ARRAY("field-class", fc, "Field class");
        return array_fc->element_fc;
 }
 
+BT_EXPORT
 struct bt_field_class *
 bt_field_class_array_borrow_element_field_class(struct bt_field_class *fc)
 {
        struct bt_field_class_array *array_fc = (void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_IS_ARRAY(fc, "Field class");
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_DEV_FC_IS_ARRAY("field-class", fc, "Field class");
        return array_fc->element_fc;
 }
 
+BT_EXPORT
 uint64_t bt_field_class_array_static_get_length(const struct bt_field_class *fc)
 {
        const struct bt_field_class_array_static *array_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_STATIC_ARRAY,
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "static-array-field-class", BT_FIELD_CLASS_TYPE_STATIC_ARRAY,
                "Field class");
        return (uint64_t) array_fc->length;
 }
@@ -1525,6 +2133,7 @@ void destroy_dynamic_array_field_class(struct bt_object *obj)
        g_free(fc);
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_array_dynamic_create(
                struct bt_trace_class *trace_class,
                struct bt_field_class *element_fc,
@@ -1532,8 +2141,10 @@ struct bt_field_class *bt_field_class_array_dynamic_create(
 {
        struct bt_field_class_array_dynamic *array_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
-       BT_ASSERT_PRE_NON_NULL(element_fc, "Element field class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
+       BT_ASSERT_PRE_NON_NULL("element-field-class", element_fc,
+               "Element field class");
        BT_LOGD_STR("Creating default dynamic array field class object.");
        array_fc = g_new0(struct bt_field_class_array_dynamic, 1);
        if (!array_fc) {
@@ -1542,15 +2153,19 @@ struct bt_field_class *bt_field_class_array_dynamic_create(
                goto error;
        }
 
-       init_array_field_class((void *) array_fc,
-               BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY,
-               destroy_dynamic_array_field_class, element_fc);
+       if (init_array_field_class((void *) array_fc,
+                       length_fc ?
+                               BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY_WITH_LENGTH_FIELD :
+                               BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY_WITHOUT_LENGTH_FIELD,
+                       destroy_dynamic_array_field_class, element_fc)) {
+               goto error;
+       }
 
        if (length_fc) {
-               BT_ASSERT_PRE_FC_IS_UNSIGNED_INT(length_fc,
-                       "Length field class");
+               BT_ASSERT_PRE_FC_IS_UNSIGNED_INT("length-field-class",
+                       length_fc, "Length field class");
                array_fc->length_fc = length_fc;
-               bt_object_get_no_null_check(array_fc->length_fc);
+               bt_object_get_ref_no_null_check(array_fc->length_fc);
                bt_field_class_freeze(length_fc);
        }
 
@@ -1564,14 +2179,18 @@ end:
        return (void *) array_fc;
 }
 
+BT_EXPORT
 const struct bt_field_path *
-bt_field_class_array_dynamic_borrow_length_field_path_const(
+bt_field_class_array_dynamic_with_length_field_borrow_length_field_path_const(
                const struct bt_field_class *fc)
 {
        const struct bt_field_class_array_dynamic *seq_fc = (const void *) fc;
 
-       BT_ASSERT_PRE_DEV_NON_NULL(fc, "Field class");
-       BT_ASSERT_PRE_DEV_FC_HAS_ID(fc, BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY,
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_FC_HAS_TYPE("field-class", fc,
+               "dynamic-array-field-class-with-length-field",
+               BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY_WITH_LENGTH_FIELD,
                "Field class");
        return seq_fc->length_field_path;
 }
@@ -1581,14 +2200,17 @@ void destroy_string_field_class(struct bt_object *obj)
 {
        BT_ASSERT(obj);
        BT_LIB_LOGD("Destroying string field class object: %!+F", obj);
+       finalize_field_class((void *) obj);
        g_free(obj);
 }
 
+BT_EXPORT
 struct bt_field_class *bt_field_class_string_create(bt_trace_class *trace_class)
 {
        struct bt_field_class_string *string_fc = NULL;
 
-       BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
+       BT_ASSERT_PRE_NO_ERROR();
+       BT_ASSERT_PRE_TC_NON_NULL(trace_class);
        BT_LOGD_STR("Creating default string field class object.");
        string_fc = g_new0(struct bt_field_class_string, 1);
        if (!string_fc) {
@@ -1597,8 +2219,11 @@ struct bt_field_class *bt_field_class_string_create(bt_trace_class *trace_class)
                goto error;
        }
 
-       init_field_class((void *) string_fc, BT_FIELD_CLASS_TYPE_STRING,
-               destroy_string_field_class);
+       if (init_field_class((void *) string_fc, BT_FIELD_CLASS_TYPE_STRING,
+                       destroy_string_field_class)) {
+               goto error;
+       }
+
        BT_LIB_LOGD("Created string field class object: %!+F", string_fc);
        goto end;
 
@@ -1609,7 +2234,6 @@ end:
        return (void *) string_fc;
 }
 
-BT_HIDDEN
 void _bt_field_class_freeze(const struct bt_field_class *c_fc)
 {
        struct bt_field_class *fc = (void *) c_fc;
@@ -1619,14 +2243,12 @@ void _bt_field_class_freeze(const struct bt_field_class *c_fc)
         * their owner.
         */
        BT_ASSERT(fc);
+       bt_value_freeze(fc->user_attributes);
        fc->frozen = true;
 
-       switch (fc->type) {
-       case BT_FIELD_CLASS_TYPE_STRUCTURE:
-       case BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR:
-       case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR:
-       case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR:
-       {
+       if (fc->type == BT_FIELD_CLASS_TYPE_STRUCTURE ||
+                       bt_field_class_type_is(fc->type,
+                               BT_FIELD_CLASS_TYPE_VARIANT)) {
                struct bt_field_class_named_field_class_container *container_fc =
                        (void *) fc;
                uint64_t i;
@@ -1635,38 +2257,32 @@ void _bt_field_class_freeze(const struct bt_field_class *c_fc)
                        bt_named_field_class_freeze(
                                container_fc->named_fcs->pdata[i]);
                }
-
-               break;
-       }
-       default:
-               break;
        }
 }
 
-BT_HIDDEN
 void _bt_named_field_class_freeze(const struct bt_named_field_class *named_fc)
 {
        BT_ASSERT(named_fc);
+       BT_ASSERT(named_fc->fc->frozen);
+       BT_LIB_LOGD("Freezing named field class's user attributes: %!+v",
+               named_fc->user_attributes);
+       bt_value_freeze(named_fc->user_attributes);
        ((struct bt_named_field_class *) named_fc)->frozen = true;
-       bt_field_class_freeze(named_fc->fc);
 }
 
-BT_HIDDEN
 void bt_field_class_make_part_of_trace_class(const struct bt_field_class *c_fc)
 {
        struct bt_field_class *fc = (void *) c_fc;
 
        BT_ASSERT(fc);
-       BT_ASSERT_PRE(!fc->part_of_trace_class,
-               "Field class is already part of a trace: %!+F", fc);
+       BT_ASSERT_PRE("field-class-is-not-part-of-trace-class",
+               !fc->part_of_trace_class,
+               "Field class is already part of a trace class: %!+F", fc);
        fc->part_of_trace_class = true;
 
-       switch (fc->type) {
-       case BT_FIELD_CLASS_TYPE_STRUCTURE:
-       case BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR:
-       case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR:
-       case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR:
-       {
+       if (fc->type == BT_FIELD_CLASS_TYPE_STRUCTURE ||
+                       bt_field_class_type_is(fc->type,
+                               BT_FIELD_CLASS_TYPE_VARIANT)) {
                struct bt_field_class_named_field_class_container *container_fc =
                        (void *) fc;
                uint64_t i;
@@ -1677,27 +2293,135 @@ void bt_field_class_make_part_of_trace_class(const struct bt_field_class *c_fc)
 
                        bt_field_class_make_part_of_trace_class(named_fc->fc);
                }
-
-               break;
-       }
-       case BT_FIELD_CLASS_TYPE_STATIC_ARRAY:
-       case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY:
-       {
+       } else if (bt_field_class_type_is(fc->type,
+                       BT_FIELD_CLASS_TYPE_ARRAY)) {
                struct bt_field_class_array *array_fc = (void *) fc;
 
                bt_field_class_make_part_of_trace_class(array_fc->element_fc);
-               break;
-       }
-       default:
-               break;
        }
 }
 
+BT_EXPORT
+const struct bt_value *bt_field_class_borrow_user_attributes_const(
+               const struct bt_field_class *fc)
+{
+       BT_ASSERT_PRE_DEV_FC_NON_NULL(fc);
+       return fc->user_attributes;
+}
+
+BT_EXPORT
+struct bt_value *bt_field_class_borrow_user_attributes(
+               struct bt_field_class *field_class)
+{
+       return (void *) bt_field_class_borrow_user_attributes_const(
+               (void *) field_class);
+}
+
+
+BT_EXPORT
+void bt_field_class_set_user_attributes(
+               struct bt_field_class *fc,
+               const struct bt_value *user_attributes)
+{
+       BT_ASSERT_PRE_FC_NON_NULL(fc);
+       BT_ASSERT_PRE_USER_ATTRS_NON_NULL(user_attributes);
+       BT_ASSERT_PRE_USER_ATTRS_IS_MAP(user_attributes);
+       BT_ASSERT_PRE_DEV_FC_HOT(fc);
+       bt_object_put_ref_no_null_check(fc->user_attributes);
+       fc->user_attributes = (void *) user_attributes;
+       bt_object_get_ref_no_null_check(fc->user_attributes);
+}
+
+static
+const struct bt_value *bt_named_field_class_borrow_user_attributes_const(
+               const struct bt_named_field_class *named_fc)
+{
+       return named_fc->user_attributes;
+}
+
+static
+void set_named_field_class_user_attributes(
+               struct bt_named_field_class *named_fc,
+               const struct bt_value *user_attributes, const char *api_func)
+{
+       BT_ASSERT_PRE_USER_ATTRS_NON_NULL_FROM_FUNC(api_func, user_attributes);
+       BT_ASSERT_PRE_USER_ATTRS_NON_NULL_FROM_FUNC(api_func, user_attributes);
+       bt_object_put_ref_no_null_check(named_fc->user_attributes);
+       named_fc->user_attributes = (void *) user_attributes;
+       bt_object_get_ref_no_null_check(named_fc->user_attributes);
+}
+
+BT_EXPORT
+const struct bt_value *
+bt_field_class_structure_member_borrow_user_attributes_const(
+               const struct bt_field_class_structure_member *member)
+{
+       BT_ASSERT_PRE_STRUCT_FC_MEMBER_NON_NULL(member);
+       return bt_named_field_class_borrow_user_attributes_const(
+               (const void *) member);
+}
+
+BT_EXPORT
+struct bt_value *
+bt_field_class_structure_member_borrow_user_attributes(
+               struct bt_field_class_structure_member *member)
+{
+       BT_ASSERT_PRE_STRUCT_FC_MEMBER_NON_NULL(member);
+       return (void *) bt_named_field_class_borrow_user_attributes_const(
+               (void *) member);
+}
+
+BT_EXPORT
+void bt_field_class_structure_member_set_user_attributes(
+               struct bt_field_class_structure_member *member,
+               const struct bt_value *user_attributes)
+{
+       BT_ASSERT_PRE_STRUCT_FC_MEMBER_NON_NULL(member);
+       BT_ASSERT_PRE_DEV_HOT("structure-field-class-member",
+               (struct bt_named_field_class *) member,
+               "Structure field class member", ".");
+       set_named_field_class_user_attributes((void *) member,
+               user_attributes, __func__);
+}
+
+BT_EXPORT
+const struct bt_value *bt_field_class_variant_option_borrow_user_attributes_const(
+               const struct bt_field_class_variant_option *option)
+{
+       BT_ASSERT_PRE_VAR_FC_OPT_NON_NULL(option);
+       return bt_named_field_class_borrow_user_attributes_const(
+               (const void *) option);
+}
+
+BT_EXPORT
+struct bt_value *bt_field_class_variant_option_borrow_user_attributes(
+               struct bt_field_class_variant_option *option)
+{
+       BT_ASSERT_PRE_VAR_FC_OPT_NON_NULL(option);
+       return (void *) bt_named_field_class_borrow_user_attributes_const(
+               (void *) option);
+}
+
+BT_EXPORT
+void bt_field_class_variant_option_set_user_attributes(
+               struct bt_field_class_variant_option *option,
+               const struct bt_value *user_attributes)
+{
+       BT_ASSERT_PRE_VAR_FC_OPT_NON_NULL(option);
+       BT_ASSERT_PRE_DEV_HOT("variant-field-class-option",
+               (struct bt_named_field_class *) option,
+               "Variant field class option", ".");
+       set_named_field_class_user_attributes((void *) option,
+               user_attributes, __func__);
+}
+
+BT_EXPORT
 void bt_field_class_get_ref(const struct bt_field_class *field_class)
 {
        bt_object_get_ref(field_class);
 }
 
+BT_EXPORT
 void bt_field_class_put_ref(const struct bt_field_class *field_class)
 {
        bt_object_put_ref(field_class);
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