lib: fully detach CTF IR and CTF writer implementations
[babeltrace.git] / lib / ctf-writer / trace.c
index 035f3b3cf22eeb0caa468027d7561415bae9e5bc..25055383b2c8431a66fa5997ef4f39b43c937f61 100644 (file)
 #define BT_LOG_TAG "CTF-WRITER-TRACE"
 #include <babeltrace/lib-logging-internal.h>
 
-#include <babeltrace/ctf-ir/trace-internal.h>
-#include <babeltrace/ctf-ir/clock-class.h>
+#include <babeltrace/assert-internal.h>
+#include <babeltrace/compiler-internal.h>
+#include <babeltrace/ctf-writer/attributes-internal.h>
+#include <babeltrace/ctf-writer/clock-class-internal.h>
 #include <babeltrace/ctf-writer/clock-internal.h>
-#include <babeltrace/ctf-writer/trace-internal.h>
+#include <babeltrace/ctf-writer/event-class-internal.h>
+#include <babeltrace/ctf-writer/event.h>
+#include <babeltrace/ctf-writer/event-internal.h>
+#include <babeltrace/ctf-writer/field-types-internal.h>
+#include <babeltrace/ctf-writer/field-wrapper-internal.h>
+#include <babeltrace/ctf-writer/functor-internal.h>
 #include <babeltrace/ctf-writer/stream-class-internal.h>
+#include <babeltrace/ctf-writer/stream-internal.h>
+#include <babeltrace/ctf-writer/trace-internal.h>
+#include <babeltrace/ctf-writer/utils-internal.h>
+#include <babeltrace/ctf-writer/utils.h>
+#include <babeltrace/ctf-writer/validation-internal.h>
+#include <babeltrace/ctf-writer/visitor-internal.h>
 #include <babeltrace/ctf-writer/writer-internal.h>
-#include <babeltrace/ctf-writer/field-types-internal.h>
+#include <babeltrace/endian-internal.h>
+#include <babeltrace/ref.h>
+#include <babeltrace/types.h>
+#include <babeltrace/values-internal.h>
+#include <babeltrace/values.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define DEFAULT_IDENTIFIER_SIZE                128
+#define DEFAULT_METADATA_STRING_SIZE   4096
+
+BT_HIDDEN
+int bt_ctf_trace_common_initialize(struct bt_ctf_trace_common *trace,
+               bt_object_release_func release_func)
+{
+       int ret = 0;
+
+       BT_LOGD_STR("Initializing common trace object.");
+       trace->native_byte_order = BT_CTF_BYTE_ORDER_UNSPECIFIED;
+       bt_object_init_shared_with_parent(&trace->base, release_func);
+       trace->clock_classes = g_ptr_array_new_with_free_func(
+               (GDestroyNotify) bt_put);
+       if (!trace->clock_classes) {
+               BT_LOGE_STR("Failed to allocate one GPtrArray.");
+               goto error;
+       }
+
+       trace->streams = g_ptr_array_new_with_free_func(
+               (GDestroyNotify) bt_object_try_spec_release);
+       if (!trace->streams) {
+               BT_LOGE_STR("Failed to allocate one GPtrArray.");
+               goto error;
+       }
+
+       trace->stream_classes = g_ptr_array_new_with_free_func(
+               (GDestroyNotify) bt_object_try_spec_release);
+       if (!trace->stream_classes) {
+               BT_LOGE_STR("Failed to allocate one GPtrArray.");
+               goto error;
+       }
+
+       /* Create the environment array object */
+       trace->environment = bt_ctf_attributes_create();
+       if (!trace->environment) {
+               BT_LOGE_STR("Cannot create empty attributes object.");
+               goto error;
+       }
+
+       BT_LOGD("Initialized common trace object: addr=%p", trace);
+       goto end;
+
+error:
+       ret = -1;
+
+end:
+       return ret;
+}
+
+BT_HIDDEN
+void bt_ctf_trace_common_finalize(struct bt_ctf_trace_common *trace)
+{
+       BT_LOGD("Finalizing common trace object: addr=%p, name=\"%s\"",
+               trace, bt_ctf_trace_common_get_name(trace));
+
+       if (trace->environment) {
+               BT_LOGD_STR("Destroying environment attributes.");
+               bt_ctf_attributes_destroy(trace->environment);
+       }
+
+       if (trace->name) {
+               g_string_free(trace->name, TRUE);
+       }
+
+       if (trace->clock_classes) {
+               BT_LOGD_STR("Putting clock classes.");
+               g_ptr_array_free(trace->clock_classes, TRUE);
+       }
+
+       if (trace->streams) {
+               BT_LOGD_STR("Destroying streams.");
+               g_ptr_array_free(trace->streams, TRUE);
+       }
+
+       if (trace->stream_classes) {
+               BT_LOGD_STR("Destroying stream classes.");
+               g_ptr_array_free(trace->stream_classes, TRUE);
+       }
+
+       BT_LOGD_STR("Putting packet header field type.");
+       bt_put(trace->packet_header_field_type);
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_set_name(struct bt_ctf_trace_common *trace, const char *name)
+{
+       int ret = 0;
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!name) {
+               BT_LOGW_STR("Invalid parameter: name is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (trace->frozen) {
+               BT_LOGW("Invalid parameter: trace is frozen: "
+                       "addr=%p, name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace));
+               ret = -1;
+               goto end;
+       }
+
+       trace->name = trace->name ? g_string_assign(trace->name, name) :
+                       g_string_new(name);
+       if (!trace->name) {
+               BT_LOGE_STR("Failed to allocate one GString.");
+               ret = -1;
+               goto end;
+       }
+
+       BT_LOGV("Set trace's name: addr=%p, name=\"%s\"", trace, name);
+
+end:
+       return ret;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_set_uuid(struct bt_ctf_trace_common *trace,
+               const unsigned char *uuid)
+{
+       int ret = 0;
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!uuid) {
+               BT_LOGW_STR("Invalid parameter: UUID is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (trace->frozen) {
+               BT_LOGW("Invalid parameter: trace is frozen: "
+                       "addr=%p, name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace));
+               ret = -1;
+               goto end;
+       }
+
+       memcpy(trace->uuid, uuid, BABELTRACE_UUID_LEN);
+       trace->uuid_set = BT_TRUE;
+       BT_LOGV("Set trace's UUID: addr=%p, name=\"%s\", "
+               "uuid=\"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\"",
+               trace, bt_ctf_trace_common_get_name(trace),
+               (unsigned int) uuid[0],
+               (unsigned int) uuid[1],
+               (unsigned int) uuid[2],
+               (unsigned int) uuid[3],
+               (unsigned int) uuid[4],
+               (unsigned int) uuid[5],
+               (unsigned int) uuid[6],
+               (unsigned int) uuid[7],
+               (unsigned int) uuid[8],
+               (unsigned int) uuid[9],
+               (unsigned int) uuid[10],
+               (unsigned int) uuid[11],
+               (unsigned int) uuid[12],
+               (unsigned int) uuid[13],
+               (unsigned int) uuid[14],
+               (unsigned int) uuid[15]);
+
+end:
+       return ret;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_set_environment_field(struct bt_ctf_trace_common *trace,
+               const char *name, struct bt_value *value)
+{
+       int ret = 0;
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!name) {
+               BT_LOGW_STR("Invalid parameter: name is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!value) {
+               BT_LOGW_STR("Invalid parameter: value is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!bt_ctf_identifier_is_valid(name)) {
+               BT_LOGW("Invalid parameter: environment field's name is not a valid CTF identifier: "
+                       "trace-addr=%p, trace-name=\"%s\", "
+                       "env-name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace), name);
+               ret = -1;
+               goto end;
+       }
+
+       if (!bt_value_is_integer(value) && !bt_value_is_string(value)) {
+               BT_LOGW("Invalid parameter: environment field's value is not an integer or string value: "
+                       "trace-addr=%p, trace-name=\"%s\", "
+                       "env-name=\"%s\", env-value-type=%s",
+                       trace, bt_ctf_trace_common_get_name(trace), name,
+                       bt_value_type_string(bt_value_get_type(value)));
+               ret = -1;
+               goto end;
+       }
+
+       if (trace->frozen) {
+               /*
+                * New environment fields may be added to a frozen trace,
+                * but existing fields may not be changed.
+                *
+                * The object passed is frozen like all other attributes.
+                */
+               struct bt_value *attribute =
+                       bt_ctf_attributes_borrow_field_value_by_name(
+                               trace->environment, name);
+
+               if (attribute) {
+                       BT_LOGW("Invalid parameter: trace is frozen and environment field already exists with this name: "
+                               "trace-addr=%p, trace-name=\"%s\", "
+                               "env-name=\"%s\"",
+                               trace, bt_ctf_trace_common_get_name(trace), name);
+                       ret = -1;
+                       goto end;
+               }
+
+               bt_value_freeze(value);
+       }
+
+       ret = bt_ctf_attributes_set_field_value(trace->environment, name,
+               value);
+       if (ret) {
+               BT_LOGE("Cannot set environment field's value: "
+                       "trace-addr=%p, trace-name=\"%s\", "
+                       "env-name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace), name);
+       } else {
+               BT_LOGV("Set environment field's value: "
+                       "trace-addr=%p, trace-name=\"%s\", "
+                       "env-name=\"%s\", value-addr=%p",
+                       trace, bt_ctf_trace_common_get_name(trace), name, value);
+       }
+
+end:
+       return ret;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_set_environment_field_string(struct bt_ctf_trace_common *trace,
+               const char *name, const char *value)
+{
+       int ret = 0;
+       struct bt_value *env_value_string_obj = NULL;
+
+       if (!value) {
+               BT_LOGW_STR("Invalid parameter: value is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       env_value_string_obj = bt_value_string_create_init(value);
+       if (!env_value_string_obj) {
+               BT_LOGE_STR("Cannot create string value object.");
+               ret = -1;
+               goto end;
+       }
+
+       /* bt_ctf_trace_common_set_environment_field() logs errors */
+       ret = bt_ctf_trace_common_set_environment_field(trace, name,
+               env_value_string_obj);
+
+end:
+       bt_put(env_value_string_obj);
+       return ret;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_set_environment_field_integer(
+               struct bt_ctf_trace_common *trace, const char *name, int64_t value)
+{
+       int ret = 0;
+       struct bt_value *env_value_integer_obj = NULL;
+
+       env_value_integer_obj = bt_value_integer_create_init(value);
+       if (!env_value_integer_obj) {
+               BT_LOGE_STR("Cannot create integer value object.");
+               ret = -1;
+               goto end;
+       }
+
+       /* bt_ctf_trace_common_set_environment_field() logs errors */
+       ret = bt_ctf_trace_common_set_environment_field(trace, name,
+               env_value_integer_obj);
+
+end:
+       bt_put(env_value_integer_obj);
+       return ret;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_add_clock_class(struct bt_ctf_trace_common *trace,
+               struct bt_ctf_clock_class *clock_class)
+{
+       int ret = 0;
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!bt_ctf_clock_class_is_valid(clock_class)) {
+               BT_LOGW("Invalid parameter: clock class is invalid: "
+                       "trace-addr=%p, trace-name=\"%s\", "
+                       "clock-class-addr=%p, clock-class-name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace),
+                       clock_class, bt_ctf_clock_class_get_name(clock_class));
+               ret = -1;
+               goto end;
+       }
+
+       /* Check for duplicate clock classes */
+       if (bt_ctf_trace_common_has_clock_class(trace, clock_class)) {
+               BT_LOGW("Invalid parameter: clock class already exists in trace: "
+                       "trace-addr=%p, trace-name=\"%s\", "
+                       "clock-class-addr=%p, clock-class-name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace),
+                       clock_class, bt_ctf_clock_class_get_name(clock_class));
+               ret = -1;
+               goto end;
+       }
+
+       bt_get(clock_class);
+       g_ptr_array_add(trace->clock_classes, clock_class);
+
+       if (trace->frozen) {
+               BT_LOGV_STR("Freezing added clock class because trace is frozen.");
+               bt_ctf_clock_class_freeze(clock_class);
+       }
+
+       BT_LOGV("Added clock class to trace: "
+               "trace-addr=%p, trace-name=\"%s\", "
+               "clock-class-addr=%p, clock-class-name=\"%s\"",
+               trace, bt_ctf_trace_common_get_name(trace),
+               clock_class, bt_ctf_clock_class_get_name(clock_class));
+
+end:
+       return ret;
+}
+
+static
+bool packet_header_field_type_is_valid(struct bt_ctf_trace_common *trace,
+               struct bt_ctf_field_type_common *packet_header_type)
+{
+       int ret;
+       bool is_valid = true;
+       struct bt_ctf_field_type_common *field_type = NULL;
+
+       if (!packet_header_type) {
+               /*
+                * No packet header field type: trace must have only
+                * one stream. At this point the stream class being
+                * added is not part of the trace yet, so we validate
+                * that the trace contains no stream classes yet.
+                */
+               if (trace->stream_classes->len >= 1) {
+                       BT_LOGW_STR("Invalid packet header field type: "
+                               "packet header field type does not exist but there's more than one stream class in the trace.");
+                       goto invalid;
+               }
+
+               /* No packet header field type: valid at this point */
+               goto end;
+       }
+
+       /* Packet header field type, if it exists, must be a structure */
+       if (packet_header_type->id != BT_CTF_FIELD_TYPE_ID_STRUCT) {
+               BT_LOGW("Invalid packet header field type: must be a structure field type if it exists: "
+                       "ft-addr=%p, ft-id=%s",
+                       packet_header_type,
+                       bt_ctf_field_type_id_string(packet_header_type->id));
+               goto invalid;
+       }
+
+       /*
+        * If there's a `magic` field, it must be a 32-bit unsigned
+        * integer field type. Also it must be the first field of the
+        * packet header field type.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_header_type, "magic");
+       if (field_type) {
+               const char *field_name;
+
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet header field type: `magic` field must be an integer field type: "
+                               "magic-ft-addr=%p, magic-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet header field type: `magic` field must be an unsigned integer field type: "
+                               "magic-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_get_size(field_type) != 32) {
+                       BT_LOGW("Invalid packet header field type: `magic` field must be a 32-bit unsigned integer field type: "
+                               "magic-ft-addr=%p, magic-ft-size=%u",
+                               field_type,
+                               bt_ctf_field_type_common_integer_get_size(field_type));
+                       goto invalid;
+               }
+
+               ret = bt_ctf_field_type_common_structure_borrow_field_by_index(
+                       packet_header_type, &field_name, NULL, 0);
+               BT_ASSERT(ret == 0);
+
+               if (strcmp(field_name, "magic") != 0) {
+                       BT_LOGW("Invalid packet header field type: `magic` field must be the first field: "
+                               "magic-ft-addr=%p, first-field-name=\"%s\"",
+                               field_type, field_name);
+                       goto invalid;
+               }
+       }
+
+       /*
+        * If there's a `uuid` field, it must be an array field type of
+        * length 16 with an 8-bit unsigned integer element field type.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_header_type, "uuid");
+       if (field_type) {
+               struct bt_ctf_field_type_common *elem_ft;
+
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_ARRAY) {
+                       BT_LOGW("Invalid packet header field type: `uuid` field must be an array field type: "
+                               "uuid-ft-addr=%p, uuid-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_array_get_length(field_type) != 16) {
+                       BT_LOGW("Invalid packet header field type: `uuid` array field type's length must be 16: "
+                               "uuid-ft-addr=%p, uuid-ft-length=%" PRId64,
+                               field_type,
+                               bt_ctf_field_type_common_array_get_length(field_type));
+                       goto invalid;
+               }
+
+               elem_ft = bt_ctf_field_type_common_array_borrow_element_field_type(field_type);
+               BT_ASSERT(elem_ft);
+
+               if (elem_ft->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet header field type: `uuid` field's element field type must be an integer field type: "
+                               "elem-ft-addr=%p, elem-ft-id=%s",
+                               elem_ft,
+                               bt_ctf_field_type_id_string(elem_ft->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(elem_ft)) {
+                       BT_LOGW("Invalid packet header field type: `uuid` field's element field type must be an unsigned integer field type: "
+                               "elem-ft-addr=%p", elem_ft);
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_get_size(elem_ft) != 8) {
+                       BT_LOGW("Invalid packet header field type: `uuid` field's element field type must be an 8-bit unsigned integer field type: "
+                               "elem-ft-addr=%p, elem-ft-size=%u",
+                               elem_ft,
+                               bt_ctf_field_type_common_integer_get_size(elem_ft));
+                       goto invalid;
+               }
+       }
+
+       /*
+        * The `stream_id` field must exist if there's more than one
+        * stream classes in the trace.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_header_type, "stream_id");
+
+       if (!field_type && trace->stream_classes->len >= 1) {
+               BT_LOGW_STR("Invalid packet header field type: "
+                       "`stream_id` field does not exist but there's more than one stream class in the trace.");
+               goto invalid;
+       }
+
+       /*
+        * If there's a `stream_id` field, it must be an unsigned
+        * integer field type.
+        */
+       if (field_type) {
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet header field type: `stream_id` field must be an integer field type: "
+                               "stream-id-ft-addr=%p, stream-id-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet header field type: `stream_id` field must be an unsigned integer field type: "
+                               "stream-id-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+       }
+
+       /*
+        * If there's a `packet_seq_num` field, it must be an unsigned
+        * integer field type.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_header_type, "packet_seq_num");
+       if (field_type) {
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet header field type: `packet_seq_num` field must be an integer field type: "
+                               "stream-id-ft-addr=%p, packet-seq-num-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet header field type: `packet_seq_num` field must be an unsigned integer field type: "
+                               "packet-seq-num-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+       }
+
+       goto end;
+
+invalid:
+       is_valid = false;
+
+end:
+       return is_valid;
+}
+
+static
+bool packet_context_field_type_is_valid(struct bt_ctf_trace_common *trace,
+               struct bt_ctf_stream_class_common *stream_class,
+               struct bt_ctf_field_type_common *packet_context_type,
+               bool check_ts_begin_end_mapped)
+{
+       bool is_valid = true;
+       struct bt_ctf_field_type_common *field_type = NULL;
+
+       if (!packet_context_type) {
+               /* No packet context field type: valid at this point */
+               goto end;
+       }
+
+       /* Packet context field type, if it exists, must be a structure */
+       if (packet_context_type->id != BT_CTF_FIELD_TYPE_ID_STRUCT) {
+               BT_LOGW("Invalid packet context field type: must be a structure field type if it exists: "
+                       "ft-addr=%p, ft-id=%s",
+                       packet_context_type,
+                       bt_ctf_field_type_id_string(packet_context_type->id));
+               goto invalid;
+       }
+
+       /*
+        * If there's a `packet_size` field, it must be an unsigned
+        * integer field type.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_context_type, "packet_size");
+       if (field_type) {
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet context field type: `packet_size` field must be an integer field type: "
+                               "packet-size-ft-addr=%p, packet-size-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet context field type: `packet_size` field must be an unsigned integer field type: "
+                               "packet-size-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+       }
+
+       /*
+        * If there's a `content_size` field, it must be an unsigned
+        * integer field type.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_context_type, "content_size");
+       if (field_type) {
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet context field type: `content_size` field must be an integer field type: "
+                               "content-size-ft-addr=%p, content-size-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet context field type: `content_size` field must be an unsigned integer field type: "
+                               "content-size-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+       }
+
+       /*
+        * If there's a `events_discarded` field, it must be an unsigned
+        * integer field type.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_context_type, "events_discarded");
+       if (field_type) {
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet context field type: `events_discarded` field must be an integer field type: "
+                               "events-discarded-ft-addr=%p, events-discarded-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet context field type: `events_discarded` field must be an unsigned integer field type: "
+                               "events-discarded-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+       }
+
+       /*
+        * If there's a `timestamp_begin` field, it must be an unsigned
+        * integer field type. Also, if the trace is not a CTF writer's
+        * trace, then we cannot automatically set the mapped clock
+        * class of this field, so it must have a mapped clock class.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_context_type, "timestamp_begin");
+       if (field_type) {
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet context field type: `timestamp_begin` field must be an integer field type: "
+                               "timestamp-begin-ft-addr=%p, timestamp-begin-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet context field type: `timestamp_begin` field must be an unsigned integer field type: "
+                               "timestamp-begin-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+
+               if (check_ts_begin_end_mapped) {
+                       struct bt_ctf_clock_class *clock_class =
+                               bt_ctf_field_type_common_integer_borrow_mapped_clock_class(
+                                       field_type);
+
+                       if (!clock_class) {
+                               BT_LOGW("Invalid packet context field type: `timestamp_begin` field must be mapped to a clock class: "
+                                       "timestamp-begin-ft-addr=%p", field_type);
+                               goto invalid;
+                       }
+               }
+       }
 
-#define DEFAULT_IDENTIFIER_SIZE                128
-#define DEFAULT_METADATA_STRING_SIZE   4096
+       /*
+        * If there's a `timestamp_end` field, it must be an unsigned
+        * integer field type. Also, if the trace is not a CTF writer's
+        * trace, then we cannot automatically set the mapped clock
+        * class of this field, so it must have a mapped clock class.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               packet_context_type, "timestamp_end");
+       if (field_type) {
+               if (field_type->id != BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       BT_LOGW("Invalid packet context field type: `timestamp_end` field must be an integer field type: "
+                               "timestamp-end-ft-addr=%p, timestamp-end-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               if (bt_ctf_field_type_common_integer_is_signed(field_type)) {
+                       BT_LOGW("Invalid packet context field type: `timestamp_end` field must be an unsigned integer field type: "
+                               "timestamp-end-ft-addr=%p", field_type);
+                       goto invalid;
+               }
+
+               if (check_ts_begin_end_mapped) {
+                       struct bt_ctf_clock_class *clock_class =
+                               bt_ctf_field_type_common_integer_borrow_mapped_clock_class(
+                                       field_type);
+
+                       if (!clock_class) {
+                               BT_LOGW("Invalid packet context field type: `timestamp_end` field must be mapped to a clock class: "
+                                       "timestamp-end-ft-addr=%p", field_type);
+                               goto invalid;
+                       }
+               }
+       }
+
+       goto end;
+
+invalid:
+       is_valid = false;
+
+end:
+       return is_valid;
+}
+
+static
+bool event_header_field_type_is_valid(struct bt_ctf_trace_common *trace,
+               struct bt_ctf_stream_class_common *stream_class,
+               struct bt_ctf_field_type_common *event_header_type)
+{
+       bool is_valid = true;
+       struct bt_ctf_field_type_common *field_type = NULL;
+
+       /*
+        * We do not validate that the `timestamp` field exists here
+        * because CTF does not require this exact name to be mapped to
+        * a clock class.
+        */
+
+       if (!event_header_type) {
+               /*
+                * No event header field type: stream class must have
+                * only one event class.
+                */
+               if (bt_ctf_stream_class_common_get_event_class_count(stream_class) > 1) {
+                       BT_LOGW_STR("Invalid event header field type: "
+                               "event header field type does not exist but there's more than one event class in the stream class.");
+                       goto invalid;
+               }
+
+               /* No event header field type: valid at this point */
+               goto end;
+       }
+
+       /* Event header field type, if it exists, must be a structure */
+       if (event_header_type->id != BT_CTF_FIELD_TYPE_ID_STRUCT) {
+               BT_LOGW("Invalid event header field type: must be a structure field type if it exists: "
+                       "ft-addr=%p, ft-id=%s",
+                       event_header_type,
+                       bt_ctf_field_type_id_string(event_header_type->id));
+               goto invalid;
+       }
+
+       /*
+        * If there's an `id` field, it must be an unsigned integer
+        * field type or an enumeration field type with an unsigned
+        * integer container field type.
+        */
+       field_type = bt_ctf_field_type_common_structure_borrow_field_type_by_name(
+               event_header_type, "id");
+       if (field_type) {
+               struct bt_ctf_field_type_common *int_ft;
+
+               if (field_type->id == BT_CTF_FIELD_TYPE_ID_INTEGER) {
+                       int_ft = field_type;
+               } else if (field_type->id == BT_CTF_FIELD_TYPE_ID_ENUM) {
+                       int_ft = bt_ctf_field_type_common_enumeration_borrow_container_field_type(
+                               field_type);
+               } else {
+                       BT_LOGW("Invalid event header field type: `id` field must be an integer or enumeration field type: "
+                               "id-ft-addr=%p, id-ft-id=%s",
+                               field_type,
+                               bt_ctf_field_type_id_string(field_type->id));
+                       goto invalid;
+               }
+
+               BT_ASSERT(int_ft);
+               if (bt_ctf_field_type_common_integer_is_signed(int_ft)) {
+                       BT_LOGW("Invalid event header field type: `id` field must be an unsigned integer or enumeration field type: "
+                               "id-ft-addr=%p", int_ft);
+                       goto invalid;
+               }
+       }
+
+       goto end;
+
+invalid:
+       is_valid = false;
+
+end:
+       return is_valid;
+}
+
+static
+int check_packet_header_type_has_no_clock_class(struct bt_ctf_trace_common *trace)
+{
+       int ret = 0;
+
+       if (trace->packet_header_field_type) {
+               struct bt_ctf_clock_class *clock_class = NULL;
+
+               ret = bt_ctf_field_type_common_validate_single_clock_class(
+                       trace->packet_header_field_type,
+                       &clock_class);
+               bt_put(clock_class);
+               if (ret || clock_class) {
+                       BT_LOGW("Trace's packet header field type cannot "
+                               "contain a field type which is mapped to "
+                               "a clock class: "
+                               "trace-addr=%p, trace-name=\"%s\", "
+                               "clock-class-name=\"%s\"",
+                               trace, bt_ctf_trace_common_get_name(trace),
+                               clock_class ?
+                                       bt_ctf_clock_class_get_name(clock_class) :
+                                       NULL);
+                       ret = -1;
+               }
+       }
+
+       return ret;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_add_stream_class(struct bt_ctf_trace_common *trace,
+               struct bt_ctf_stream_class_common *stream_class,
+               bt_ctf_validation_flag_copy_field_type_func copy_field_type_func,
+               struct bt_ctf_clock_class *init_expected_clock_class,
+               int (*map_clock_classes_func)(struct bt_ctf_stream_class_common *stream_class,
+                       struct bt_ctf_field_type_common *packet_context_field_type,
+                       struct bt_ctf_field_type_common *event_header_field_type),
+               bool check_ts_begin_end_mapped)
+{
+       int ret;
+       int64_t i;
+       int64_t stream_id;
+       struct bt_ctf_validation_output trace_sc_validation_output = { 0 };
+       struct bt_ctf_validation_output *ec_validation_outputs = NULL;
+       const enum bt_ctf_validation_flag trace_sc_validation_flags =
+               BT_CTF_VALIDATION_FLAG_TRACE |
+               BT_CTF_VALIDATION_FLAG_STREAM;
+       const enum bt_ctf_validation_flag ec_validation_flags =
+               BT_CTF_VALIDATION_FLAG_EVENT;
+       struct bt_ctf_field_type_common *packet_header_type = NULL;
+       struct bt_ctf_field_type_common *packet_context_type = NULL;
+       struct bt_ctf_field_type_common *event_header_type = NULL;
+       struct bt_ctf_field_type_common *stream_event_ctx_type = NULL;
+       int64_t event_class_count;
+       struct bt_ctf_trace_common *current_parent_trace = NULL;
+       struct bt_ctf_clock_class *expected_clock_class =
+               bt_get(init_expected_clock_class);
+
+       BT_ASSERT(copy_field_type_func);
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!stream_class) {
+               BT_LOGW_STR("Invalid parameter: stream class is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       BT_LOGD("Adding stream class to trace: "
+               "trace-addr=%p, trace-name=\"%s\", "
+               "stream-class-addr=%p, stream-class-name=\"%s\", "
+               "stream-class-id=%" PRId64,
+               trace, bt_ctf_trace_common_get_name(trace),
+               stream_class, bt_ctf_stream_class_common_get_name(stream_class),
+               bt_ctf_stream_class_common_get_id(stream_class));
+
+       current_parent_trace = bt_ctf_stream_class_common_borrow_trace(stream_class);
+       if (current_parent_trace) {
+               /* Stream class is already associated to a trace, abort. */
+               BT_LOGW("Invalid parameter: stream class is already part of a trace: "
+                       "stream-class-trace-addr=%p, "
+                       "stream-class-trace-name=\"%s\"",
+                       current_parent_trace,
+                       bt_ctf_trace_common_get_name(current_parent_trace));
+               ret = -1;
+               goto end;
+       }
+
+       event_class_count =
+               bt_ctf_stream_class_common_get_event_class_count(stream_class);
+       BT_ASSERT(event_class_count >= 0);
+
+       if (!stream_class->frozen) {
+               /*
+                * Stream class is not frozen yet. Validate that the
+                * stream class contains at most a single clock class
+                * because the previous
+                * bt_ctf_stream_class_common_add_event_class() calls did
+                * not make this validation since the stream class's
+                * direct field types (packet context, event header,
+                * event context) could change afterwards. This stream
+                * class is about to be frozen and those field types
+                * won't be changed if this function succeeds.
+                *
+                * At this point we're also sure that the stream class's
+                * clock, if any, has the same class as the stream
+                * class's expected clock class, if any. This is why, if
+                * bt_ctf_stream_class_common_validate_single_clock_class()
+                * succeeds below, the call to
+                * bt_ctf_stream_class_map_clock_class() at the end of this
+                * function is safe because it maps to the same, single
+                * clock class.
+                */
+               ret = bt_ctf_stream_class_common_validate_single_clock_class(
+                       stream_class, &expected_clock_class);
+               if (ret) {
+                       BT_LOGW("Invalid parameter: stream class or one of its "
+                               "event classes contains a field type which is "
+                               "not recursively mapped to the expected "
+                               "clock class: "
+                               "stream-class-addr=%p, "
+                               "stream-class-id=%" PRId64 ", "
+                               "stream-class-name=\"%s\", "
+                               "expected-clock-class-addr=%p, "
+                               "expected-clock-class-name=\"%s\"",
+                               stream_class, bt_ctf_stream_class_common_get_id(stream_class),
+                               bt_ctf_stream_class_common_get_name(stream_class),
+                               expected_clock_class,
+                               expected_clock_class ?
+                                       bt_ctf_clock_class_get_name(expected_clock_class) :
+                                       NULL);
+                       goto end;
+               }
+       }
+
+       ret = check_packet_header_type_has_no_clock_class(trace);
+       if (ret) {
+               /* check_packet_header_type_has_no_clock_class() logs errors */
+               goto end;
+       }
+
+       /*
+        * We're about to freeze both the trace and the stream class.
+        * Also, each event class contained in this stream class are
+        * already frozen.
+        *
+        * This trace, this stream class, and all its event classes
+        * should be valid at this point.
+        *
+        * Validate trace and stream class first, then each event
+        * class of this stream class can be validated individually.
+        */
+       packet_header_type =
+               bt_ctf_trace_common_borrow_packet_header_field_type(trace);
+       packet_context_type =
+               bt_ctf_stream_class_common_borrow_packet_context_field_type(stream_class);
+       event_header_type =
+               bt_ctf_stream_class_common_borrow_event_header_field_type(stream_class);
+       stream_event_ctx_type =
+               bt_ctf_stream_class_common_borrow_event_context_field_type(stream_class);
+
+       BT_LOGD("Validating trace and stream class field types.");
+       ret = bt_ctf_validate_class_types(trace->environment,
+               packet_header_type, packet_context_type, event_header_type,
+               stream_event_ctx_type, NULL, NULL, trace->valid,
+               stream_class->valid, 1, &trace_sc_validation_output,
+               trace_sc_validation_flags, copy_field_type_func);
+
+       if (ret) {
+               /*
+                * This means something went wrong during the validation
+                * process, not that the objects are invalid.
+                */
+               BT_LOGE("Failed to validate trace and stream class field types: "
+                       "ret=%d", ret);
+               goto end;
+       }
+
+       if ((trace_sc_validation_output.valid_flags &
+                       trace_sc_validation_flags) !=
+                       trace_sc_validation_flags) {
+               /* Invalid trace/stream class */
+               BT_LOGW("Invalid trace or stream class field types: "
+                       "valid-flags=0x%x",
+                       trace_sc_validation_output.valid_flags);
+               ret = -1;
+               goto end;
+       }
+
+       if (event_class_count > 0) {
+               ec_validation_outputs = g_new0(struct bt_ctf_validation_output,
+                       event_class_count);
+               if (!ec_validation_outputs) {
+                       BT_LOGE_STR("Failed to allocate one validation output structure.");
+                       ret = -1;
+                       goto end;
+               }
+       }
+
+       /* Validate each event class individually */
+       for (i = 0; i < event_class_count; i++) {
+               struct bt_ctf_event_class_common *event_class =
+                       bt_ctf_stream_class_common_borrow_event_class_by_index(
+                               stream_class, i);
+               struct bt_ctf_field_type_common *event_context_type = NULL;
+               struct bt_ctf_field_type_common *event_payload_type = NULL;
+
+               event_context_type =
+                       bt_ctf_event_class_common_borrow_context_field_type(
+                               event_class);
+               event_payload_type =
+                       bt_ctf_event_class_common_borrow_payload_field_type(
+                               event_class);
+
+               /*
+                * It is important to use the field types returned by
+                * the previous trace and stream class validation here
+                * because copies could have been made.
+                */
+               BT_LOGD("Validating event class's field types: "
+                       "addr=%p, name=\"%s\", id=%" PRId64,
+                       event_class, bt_ctf_event_class_common_get_name(event_class),
+                       bt_ctf_event_class_common_get_id(event_class));
+               ret = bt_ctf_validate_class_types(trace->environment,
+                       trace_sc_validation_output.packet_header_type,
+                       trace_sc_validation_output.packet_context_type,
+                       trace_sc_validation_output.event_header_type,
+                       trace_sc_validation_output.stream_event_ctx_type,
+                       event_context_type, event_payload_type,
+                       1, 1, event_class->valid, &ec_validation_outputs[i],
+                       ec_validation_flags, copy_field_type_func);
+
+               if (ret) {
+                       BT_LOGE("Failed to validate event class field types: "
+                               "ret=%d", ret);
+                       goto end;
+               }
+
+               if ((ec_validation_outputs[i].valid_flags &
+                               ec_validation_flags) != ec_validation_flags) {
+                       /* Invalid event class */
+                       BT_LOGW("Invalid event class field types: "
+                               "valid-flags=0x%x",
+                               ec_validation_outputs[i].valid_flags);
+                       ret = -1;
+                       goto end;
+               }
+       }
+
+       stream_id = bt_ctf_stream_class_common_get_id(stream_class);
+       if (stream_id < 0) {
+               stream_id = trace->next_stream_id++;
+               if (stream_id < 0) {
+                       BT_LOGE_STR("No more stream class IDs available.");
+                       ret = -1;
+                       goto end;
+               }
+
+               /* Try to assign a new stream id */
+               for (i = 0; i < trace->stream_classes->len; i++) {
+                       if (stream_id == bt_ctf_stream_class_common_get_id(
+                               trace->stream_classes->pdata[i])) {
+                               /* Duplicate stream id found */
+                               BT_LOGW("Duplicate stream class ID: "
+                                       "id=%" PRId64, (int64_t) stream_id);
+                               ret = -1;
+                               goto end;
+                       }
+               }
+
+               if (bt_ctf_stream_class_common_set_id_no_check(stream_class,
+                               stream_id)) {
+                       /* TODO Should retry with a different stream id */
+                       BT_LOGE("Cannot set stream class's ID: "
+                               "id=%" PRId64, (int64_t) stream_id);
+                       ret = -1;
+                       goto end;
+               }
+       }
+
+       /*
+        * At this point all the field types in the validation output
+        * are valid. Validate the semantics of some scopes according to
+        * the CTF specification.
+        */
+       if (!packet_header_field_type_is_valid(trace,
+                       trace_sc_validation_output.packet_header_type)) {
+               BT_LOGW_STR("Invalid trace's packet header field type.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!packet_context_field_type_is_valid(trace,
+                       stream_class,
+                       trace_sc_validation_output.packet_context_type,
+                       check_ts_begin_end_mapped)) {
+               BT_LOGW_STR("Invalid stream class's packet context field type.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!event_header_field_type_is_valid(trace,
+                       stream_class,
+                       trace_sc_validation_output.event_header_type)) {
+               BT_LOGW_STR("Invalid steam class's event header field type.");
+               ret = -1;
+               goto end;
+       }
+
+       /*
+        * Now is the time to automatically map specific field types of
+        * the stream class's packet context and event header field
+        * types to the stream class's clock's class if they are not
+        * mapped to a clock class yet. We do it here because we know
+        * that after this point, everything is frozen so it won't be
+        * possible for the user to modify the stream class's clock, or
+        * to map those field types to other clock classes.
+        */
+       if (map_clock_classes_func) {
+               if (map_clock_classes_func(stream_class,
+                               trace_sc_validation_output.packet_context_type,
+                               trace_sc_validation_output.event_header_type)) {
+                       /* map_clock_classes_func() logs errors */
+                       ret = -1;
+                       goto end;
+               }
+       }
+
+       bt_object_set_parent(&stream_class->base, &trace->base);
+       g_ptr_array_add(trace->stream_classes, stream_class);
+
+       /*
+        * At this point we know that the function will be successful.
+        * Therefore we can replace the trace and stream class field
+        * types with what's in their validation output structure and
+        * mark them as valid. We can also replace the field types of
+        * all the event classes of the stream class and mark them as
+        * valid.
+        */
+       bt_ctf_validation_replace_types(trace, stream_class, NULL,
+               &trace_sc_validation_output, trace_sc_validation_flags);
+       trace->valid = 1;
+       stream_class->valid = 1;
+
+       /*
+        * Put what was not moved in bt_ctf_validation_replace_types().
+        */
+       bt_ctf_validation_output_put_types(&trace_sc_validation_output);
+
+       for (i = 0; i < event_class_count; i++) {
+               struct bt_ctf_event_class_common *event_class =
+                       bt_ctf_stream_class_common_borrow_event_class_by_index(
+                               stream_class, i);
+
+               bt_ctf_validation_replace_types(NULL, NULL, event_class,
+                       &ec_validation_outputs[i], ec_validation_flags);
+               event_class->valid = 1;
+
+               /*
+                * Put what was not moved in
+                * bt_ctf_validation_replace_types().
+                */
+               bt_ctf_validation_output_put_types(&ec_validation_outputs[i]);
+       }
+
+       /*
+        * Freeze the trace and the stream class.
+        */
+       bt_ctf_stream_class_common_freeze(stream_class);
+       bt_ctf_trace_common_freeze(trace);
+
+       /*
+        * It is safe to set the stream class's unique clock class
+        * now because the stream class is frozen.
+        */
+       if (expected_clock_class) {
+               BT_MOVE(stream_class->clock_class, expected_clock_class);
+       }
+
+       BT_LOGD("Added stream class to trace: "
+               "trace-addr=%p, trace-name=\"%s\", "
+               "stream-class-addr=%p, stream-class-name=\"%s\", "
+               "stream-class-id=%" PRId64,
+               trace, bt_ctf_trace_common_get_name(trace),
+               stream_class, bt_ctf_stream_class_common_get_name(stream_class),
+               bt_ctf_stream_class_common_get_id(stream_class));
+
+end:
+       if (ret) {
+               bt_object_set_parent(&stream_class->base, NULL);
+
+               if (ec_validation_outputs) {
+                       for (i = 0; i < event_class_count; i++) {
+                               bt_ctf_validation_output_put_types(
+                                       &ec_validation_outputs[i]);
+                       }
+               }
+       }
+
+       g_free(ec_validation_outputs);
+       bt_ctf_validation_output_put_types(&trace_sc_validation_output);
+       bt_put(expected_clock_class);
+       return ret;
+}
+
+BT_HIDDEN
+bt_bool bt_ctf_trace_common_has_clock_class(struct bt_ctf_trace_common *trace,
+               struct bt_ctf_clock_class *clock_class)
+{
+       struct bt_ctf_search_query query = { .value = clock_class, .found = 0 };
+
+       BT_ASSERT(trace);
+       BT_ASSERT(clock_class);
+
+       g_ptr_array_foreach(trace->clock_classes, value_exists, &query);
+       return query.found;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_set_native_byte_order(struct bt_ctf_trace_common *trace,
+               enum bt_ctf_byte_order byte_order, bool allow_unspecified)
+{
+       int ret = 0;
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (trace->frozen) {
+               BT_LOGW("Invalid parameter: trace is frozen: "
+                       "addr=%p, name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace));
+               ret = -1;
+               goto end;
+       }
+
+       if (byte_order == BT_CTF_BYTE_ORDER_UNSPECIFIED && !allow_unspecified) {
+               BT_LOGW("Invalid parameter: BT_CTF_BYTE_ORDER_UNSPECIFIED byte order is not allowed: "
+                       "addr=%p, name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace));
+               ret = -1;
+               goto end;
+       }
+
+       if (byte_order != BT_CTF_BYTE_ORDER_LITTLE_ENDIAN &&
+                       byte_order != BT_CTF_BYTE_ORDER_BIG_ENDIAN &&
+                       byte_order != BT_CTF_BYTE_ORDER_NETWORK) {
+               BT_LOGW("Invalid parameter: invalid byte order: "
+                       "addr=%p, name=\"%s\", bo=%s",
+                       trace, bt_ctf_trace_common_get_name(trace),
+                       bt_ctf_byte_order_string(byte_order));
+               ret = -1;
+               goto end;
+       }
+
+       trace->native_byte_order = byte_order;
+       BT_LOGV("Set trace's native byte order: "
+               "addr=%p, name=\"%s\", bo=%s",
+               trace, bt_ctf_trace_common_get_name(trace),
+               bt_ctf_byte_order_string(byte_order));
+
+end:
+       return ret;
+}
+
+BT_HIDDEN
+int bt_ctf_trace_common_set_packet_header_field_type(struct bt_ctf_trace_common *trace,
+               struct bt_ctf_field_type_common *packet_header_type)
+{
+       int ret = 0;
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (trace->frozen) {
+               BT_LOGW("Invalid parameter: trace is frozen: "
+                       "addr=%p, name=\"%s\"",
+                       trace, bt_ctf_trace_common_get_name(trace));
+               ret = -1;
+               goto end;
+       }
+
+       /* packet_header_type must be a structure. */
+       if (packet_header_type &&
+                       packet_header_type->id != BT_CTF_FIELD_TYPE_ID_STRUCT) {
+               BT_LOGW("Invalid parameter: packet header field type must be a structure field type if it exists: "
+                       "addr=%p, name=\"%s\", ft-addr=%p, ft-id=%s",
+                       trace, bt_ctf_trace_common_get_name(trace),
+                       packet_header_type,
+                       bt_ctf_field_type_id_string(packet_header_type->id));
+               ret = -1;
+               goto end;
+       }
+
+       bt_put(trace->packet_header_field_type);
+       trace->packet_header_field_type = bt_get(packet_header_type);
+       BT_LOGV("Set trace's packet header field type: "
+               "addr=%p, name=\"%s\", packet-context-ft-addr=%p",
+               trace, bt_ctf_trace_common_get_name(trace), packet_header_type);
+end:
+       return ret;
+}
+
+static
+int64_t get_stream_class_count(void *element)
+{
+       return bt_ctf_trace_get_stream_class_count(
+                       (struct bt_ctf_trace *) element);
+}
+
+static
+void *get_stream_class(void *element, int i)
+{
+       return bt_ctf_trace_get_stream_class_by_index(
+                       (struct bt_ctf_trace *) element, i);
+}
+
+static
+int visit_stream_class(void *object, bt_ctf_visitor visitor,void *data)
+{
+       return bt_ctf_stream_class_visit(object, visitor, data);
+}
+
+int bt_ctf_trace_visit(struct bt_ctf_trace *trace,
+               bt_ctf_visitor visitor, void *data)
+{
+       int ret;
+       struct bt_ctf_visitor_object obj = {
+               .object = trace,
+               .type = BT_CTF_VISITOR_OBJECT_TYPE_TRACE
+       };
+
+       if (!trace) {
+               BT_LOGW_STR("Invalid parameter: trace is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       if (!visitor) {
+               BT_LOGW_STR("Invalid parameter: visitor is NULL.");
+               ret = -1;
+               goto end;
+       }
+
+       BT_LOGV("Visiting trace: addr=%p, name=\"%s\"",
+               trace, bt_ctf_trace_get_name(trace));
+       ret = visitor_helper(&obj, get_stream_class_count,
+                       get_stream_class, visit_stream_class, visitor, data);
+end:
+       return ret;
+}
 
 static
 void bt_ctf_trace_destroy(struct bt_object *obj)
@@ -42,7 +1424,7 @@ void bt_ctf_trace_destroy(struct bt_object *obj)
 
        BT_LOGD("Destroying CTF writer trace object: addr=%p, name=\"%s\"",
                trace, bt_ctf_trace_get_name(trace));
-       bt_trace_common_finalize(BT_TO_COMMON(trace));
+       bt_ctf_trace_common_finalize(BT_CTF_TO_COMMON(trace));
        g_free(trace);
 }
 
@@ -59,10 +1441,10 @@ struct bt_ctf_trace *bt_ctf_trace_create(void)
                goto error;
        }
 
-       ret = bt_trace_common_initialize(BT_TO_COMMON(trace),
+       ret = bt_ctf_trace_common_initialize(BT_CTF_TO_COMMON(trace),
                bt_ctf_trace_destroy);
        if (ret) {
-               /* bt_trace_common_initialize() logs errors */
+               /* bt_ctf_trace_common_initialize() logs errors */
                goto error;
        }
 
@@ -76,91 +1458,94 @@ error:
 
 const unsigned char *bt_ctf_trace_get_uuid(struct bt_ctf_trace *trace)
 {
-       return bt_trace_common_get_uuid(BT_TO_COMMON(trace));
+       return bt_ctf_trace_common_get_uuid(BT_CTF_TO_COMMON(trace));
 }
 
 int bt_ctf_trace_set_uuid(struct bt_ctf_trace *trace,
                const unsigned char *uuid)
 {
-       return bt_trace_common_set_uuid(BT_TO_COMMON(trace), uuid);
+       return bt_ctf_trace_common_set_uuid(BT_CTF_TO_COMMON(trace), uuid);
 }
 
 int bt_ctf_trace_set_environment_field(struct bt_ctf_trace *trace,
                const char *name, struct bt_value *value)
 {
-       return bt_trace_common_set_environment_field(BT_TO_COMMON(trace),
+       return bt_ctf_trace_common_set_environment_field(BT_CTF_TO_COMMON(trace),
                name, value);
 }
 
 int bt_ctf_trace_set_environment_field_string(struct bt_ctf_trace *trace,
                const char *name, const char *value)
 {
-       return bt_trace_common_set_environment_field_string(BT_TO_COMMON(trace),
+       return bt_ctf_trace_common_set_environment_field_string(BT_CTF_TO_COMMON(trace),
                name, value);
 }
 
 int bt_ctf_trace_set_environment_field_integer(
                struct bt_ctf_trace *trace, const char *name, int64_t value)
 {
-       return bt_trace_common_set_environment_field_integer(
-               BT_TO_COMMON(trace), name, value);
+       return bt_ctf_trace_common_set_environment_field_integer(
+               BT_CTF_TO_COMMON(trace), name, value);
 }
 
 int64_t bt_ctf_trace_get_environment_field_count(struct bt_ctf_trace *trace)
 {
-       return bt_trace_common_get_environment_field_count(BT_TO_COMMON(trace));
+       return bt_ctf_trace_common_get_environment_field_count(BT_CTF_TO_COMMON(trace));
 }
 
 const char *
 bt_ctf_trace_get_environment_field_name_by_index(struct bt_ctf_trace *trace,
                uint64_t index)
 {
-       return bt_trace_common_get_environment_field_name_by_index(
-               BT_TO_COMMON(trace), index);
+       return bt_ctf_trace_common_get_environment_field_name_by_index(
+               BT_CTF_TO_COMMON(trace), index);
 }
 
 struct bt_value *bt_ctf_trace_get_environment_field_value_by_index(
                struct bt_ctf_trace *trace, uint64_t index)
 {
-       return bt_get(bt_trace_common_borrow_environment_field_value_by_index(
-               BT_TO_COMMON(trace), index));
+       return bt_get(bt_ctf_trace_common_borrow_environment_field_value_by_index(
+               BT_CTF_TO_COMMON(trace), index));
 }
 
 struct bt_value *bt_ctf_trace_get_environment_field_value_by_name(
                struct bt_ctf_trace *trace, const char *name)
 {
-       return bt_get(bt_trace_common_borrow_environment_field_value_by_name(
-               BT_TO_COMMON(trace), name));
+       return bt_get(bt_ctf_trace_common_borrow_environment_field_value_by_name(
+               BT_CTF_TO_COMMON(trace), name));
 }
 
+BT_HIDDEN
 int bt_ctf_trace_add_clock_class(struct bt_ctf_trace *trace,
                struct bt_ctf_clock_class *clock_class)
 {
-       return bt_trace_common_add_clock_class(BT_TO_COMMON(trace),
+       return bt_ctf_trace_common_add_clock_class(BT_CTF_TO_COMMON(trace),
                (void *) clock_class);
 }
 
+BT_HIDDEN
 int64_t bt_ctf_trace_get_clock_class_count(struct bt_ctf_trace *trace)
 {
-       return bt_trace_common_get_clock_class_count(BT_TO_COMMON(trace));
+       return bt_ctf_trace_common_get_clock_class_count(BT_CTF_TO_COMMON(trace));
 }
 
+BT_HIDDEN
 struct bt_ctf_clock_class *bt_ctf_trace_get_clock_class_by_index(
                struct bt_ctf_trace *trace, uint64_t index)
 {
-       return bt_get(bt_trace_common_borrow_clock_class_by_index(
-               BT_TO_COMMON(trace), index));
+       return bt_get(bt_ctf_trace_common_borrow_clock_class_by_index(
+               BT_CTF_TO_COMMON(trace), index));
 }
 
 static
-int map_clock_classes_func(struct bt_stream_class_common *stream_class,
-               struct bt_field_type_common *packet_context_type,
-               struct bt_field_type_common *event_header_type)
+int map_clock_classes_func(struct bt_ctf_stream_class_common *stream_class,
+               struct bt_ctf_field_type_common *packet_context_type,
+               struct bt_ctf_field_type_common *event_header_type)
 {
        int ret = bt_ctf_stream_class_map_clock_class(
-               BT_FROM_COMMON(stream_class),
-               BT_FROM_COMMON(packet_context_type),
-               BT_FROM_COMMON(event_header_type));
+               BT_CTF_FROM_COMMON(stream_class),
+               BT_CTF_FROM_COMMON(packet_context_type),
+               BT_CTF_FROM_COMMON(event_header_type));
 
        if (ret) {
                BT_LOGW_STR("Cannot automatically map selected stream class's field types to stream class's clock's class.");
@@ -173,7 +1558,7 @@ int bt_ctf_trace_add_stream_class(struct bt_ctf_trace *trace,
                struct bt_ctf_stream_class *stream_class)
 {
        int ret = 0;
-       struct bt_clock_class *expected_clock_class = NULL;
+       struct bt_ctf_clock_class *expected_clock_class = NULL;
 
        if (!trace) {
                BT_LOGW_STR("Invalid parameter: trace is NULL.");
@@ -211,15 +1596,14 @@ int bt_ctf_trace_add_stream_class(struct bt_ctf_trace *trace,
                        BT_LOGW("Stream class's clock's class is not part of the trace: "
                                "clock-class-addr=%p, clock-class-name=\"%s\"",
                                stream_clock_class,
-                               bt_clock_class_get_name(
-                                       BT_TO_COMMON(stream_clock_class)));
+                               bt_ctf_clock_class_get_name(stream_clock_class));
                        ret = -1;
                        goto end;
                }
 
                if (stream_class->common.clock_class &&
                                stream_class->common.clock_class !=
-                               BT_TO_COMMON(stream_class->clock->clock_class)) {
+                               stream_class->clock->clock_class) {
                        /*
                         * Stream class already has an expected clock
                         * class, but it does not match its clock's
@@ -237,21 +1621,20 @@ int bt_ctf_trace_add_stream_class(struct bt_ctf_trace *trace,
                                bt_ctf_stream_class_get_id(stream_class),
                                bt_ctf_stream_class_get_name(stream_class),
                                stream_class->common.clock_class,
-                               bt_clock_class_get_name(stream_class->common.clock_class));
+                               bt_ctf_clock_class_get_name(stream_class->common.clock_class));
                } else if (!stream_class->common.clock_class) {
                        /*
                         * Set expected clock class to stream class's
                         * clock's class.
                         */
-                       expected_clock_class =
-                               BT_TO_COMMON(stream_class->clock->clock_class);
+                       expected_clock_class = stream_class->clock->clock_class;
                }
        }
 
 
-       ret = bt_trace_common_add_stream_class(BT_TO_COMMON(trace),
-               BT_TO_COMMON(stream_class),
-               (bt_validation_flag_copy_field_type_func) bt_ctf_field_type_copy,
+       ret = bt_ctf_trace_common_add_stream_class(BT_CTF_TO_COMMON(trace),
+               BT_CTF_TO_COMMON(stream_class),
+               (bt_ctf_validation_flag_copy_field_type_func) bt_ctf_field_type_copy,
                expected_clock_class, map_clock_classes_func,
                false);
 
@@ -261,40 +1644,41 @@ end:
 
 int64_t bt_ctf_trace_get_stream_count(struct bt_ctf_trace *trace)
 {
-       return bt_trace_common_get_stream_count(BT_TO_COMMON(trace));
+       return bt_ctf_trace_common_get_stream_count(BT_CTF_TO_COMMON(trace));
 }
 
 struct bt_ctf_stream *bt_ctf_trace_get_stream_by_index(
                struct bt_ctf_trace *trace, uint64_t index)
 {
-       return bt_get(bt_trace_common_borrow_stream_by_index(
-               BT_TO_COMMON(trace), index));
+       return bt_get(bt_ctf_trace_common_borrow_stream_by_index(
+               BT_CTF_TO_COMMON(trace), index));
 }
 
 int64_t bt_ctf_trace_get_stream_class_count(struct bt_ctf_trace *trace)
 {
-       return bt_trace_common_get_stream_class_count(BT_TO_COMMON(trace));
+       return bt_ctf_trace_common_get_stream_class_count(BT_CTF_TO_COMMON(trace));
 }
 
 struct bt_ctf_stream_class *bt_ctf_trace_get_stream_class_by_index(
                struct bt_ctf_trace *trace, uint64_t index)
 {
-       return bt_get(bt_trace_common_borrow_stream_class_by_index(
-               BT_TO_COMMON(trace), index));
+       return bt_get(bt_ctf_trace_common_borrow_stream_class_by_index(
+               BT_CTF_TO_COMMON(trace), index));
 }
 
 struct bt_ctf_stream_class *bt_ctf_trace_get_stream_class_by_id(
                struct bt_ctf_trace *trace, uint64_t id)
 {
-       return bt_get(bt_trace_common_borrow_stream_class_by_id(
-               BT_TO_COMMON(trace), id));
+       return bt_get(bt_ctf_trace_common_borrow_stream_class_by_id(
+               BT_CTF_TO_COMMON(trace), id));
 }
 
+BT_HIDDEN
 struct bt_ctf_clock_class *bt_ctf_trace_get_clock_class_by_name(
                struct bt_ctf_trace *trace, const char *name)
 {
        return bt_get(
-               bt_trace_common_borrow_clock_class_by_name(BT_TO_COMMON(trace),
+               bt_ctf_trace_common_borrow_clock_class_by_name(BT_CTF_TO_COMMON(trace),
                        name));
 }
 
@@ -305,8 +1689,8 @@ int append_trace_metadata(struct bt_ctf_trace *trace,
        unsigned char *uuid = trace->common.uuid;
        int ret = 0;
 
-       if (trace->common.native_byte_order == BT_BYTE_ORDER_NATIVE ||
-                       trace->common.native_byte_order == BT_BYTE_ORDER_UNSPECIFIED) {
+       if (trace->common.native_byte_order == BT_CTF_BYTE_ORDER_NATIVE ||
+                       trace->common.native_byte_order == BT_CTF_BYTE_ORDER_UNSPECIFIED) {
                BT_LOGW("Invalid parameter: trace's byte order cannot be BT_CTF_BYTE_ORDER_NATIVE or BT_CTF_BYTE_ORDER_UNSPECIFIED at this point; "
                        "set it with bt_ctf_trace_set_native_byte_order(): "
                        "addr=%p, name=\"%s\"",
@@ -318,9 +1702,9 @@ int append_trace_metadata(struct bt_ctf_trace *trace,
        g_string_append(context->string, "trace {\n");
        g_string_append(context->string, "\tmajor = 1;\n");
        g_string_append(context->string, "\tminor = 8;\n");
-       BT_ASSERT(trace->common.native_byte_order == BT_BYTE_ORDER_LITTLE_ENDIAN ||
-               trace->common.native_byte_order == BT_BYTE_ORDER_BIG_ENDIAN ||
-               trace->common.native_byte_order == BT_BYTE_ORDER_NETWORK);
+       BT_ASSERT(trace->common.native_byte_order == BT_CTF_BYTE_ORDER_LITTLE_ENDIAN ||
+               trace->common.native_byte_order == BT_CTF_BYTE_ORDER_BIG_ENDIAN ||
+               trace->common.native_byte_order == BT_CTF_BYTE_ORDER_NETWORK);
 
        if (trace->common.uuid_set) {
                g_string_append_printf(context->string,
@@ -332,7 +1716,7 @@ int append_trace_metadata(struct bt_ctf_trace *trace,
        }
 
        g_string_append_printf(context->string, "\tbyte_order = %s;\n",
-               get_byte_order_string(trace->common.native_byte_order));
+               bt_ctf_get_byte_order_string(trace->common.native_byte_order));
 
        if (trace->common.packet_header_field_type) {
                g_string_append(context->string, "\tpacket.header := ");
@@ -360,7 +1744,7 @@ void append_env_metadata(struct bt_ctf_trace *trace,
        int64_t i;
        int64_t env_size;
 
-       env_size = bt_attributes_get_count(trace->common.environment);
+       env_size = bt_ctf_attributes_get_count(trace->common.environment);
        if (env_size <= 0) {
                return;
        }
@@ -371,9 +1755,9 @@ void append_env_metadata(struct bt_ctf_trace *trace,
                struct bt_value *env_field_value_obj = NULL;
                const char *entry_name;
 
-               entry_name = bt_attributes_get_field_name(
+               entry_name = bt_ctf_attributes_get_field_name(
                        trace->common.environment, i);
-               env_field_value_obj = bt_attributes_borrow_field_value(
+               env_field_value_obj = bt_ctf_attributes_borrow_field_value(
                        trace->common.environment, i);
 
                BT_ASSERT(entry_name);
@@ -452,11 +1836,11 @@ char *bt_ctf_trace_get_metadata_string(struct bt_ctf_trace *trace)
                (GFunc) bt_ctf_clock_class_serialize, context);
 
        for (i = 0; i < trace->common.stream_classes->len; i++) {
-               /* bt_stream_class_serialize() logs details */
+               /* bt_ctf_stream_class_serialize() logs details */
                err = bt_ctf_stream_class_serialize(
                        trace->common.stream_classes->pdata[i], context);
                if (err) {
-                       /* bt_stream_class_serialize() logs errors */
+                       /* bt_ctf_stream_class_serialize() logs errors */
                        goto error;
                }
        }
@@ -475,31 +1859,31 @@ end:
 enum bt_ctf_byte_order bt_ctf_trace_get_native_byte_order(
                struct bt_ctf_trace *trace)
 {
-       return (int) bt_trace_common_get_native_byte_order(BT_TO_COMMON(trace));
+       return (int) bt_ctf_trace_common_get_native_byte_order(BT_CTF_TO_COMMON(trace));
 }
 
 int bt_ctf_trace_set_native_byte_order(struct bt_ctf_trace *trace,
                enum bt_ctf_byte_order byte_order)
 {
-       return bt_trace_common_set_native_byte_order(BT_TO_COMMON(trace),
+       return bt_ctf_trace_common_set_native_byte_order(BT_CTF_TO_COMMON(trace),
                (int) byte_order, false);
 }
 
 struct bt_ctf_field_type *bt_ctf_trace_get_packet_header_field_type(
                struct bt_ctf_trace *trace)
 {
-       return bt_get(bt_trace_common_borrow_packet_header_field_type(
-               BT_TO_COMMON(trace)));
+       return bt_get(bt_ctf_trace_common_borrow_packet_header_field_type(
+               BT_CTF_TO_COMMON(trace)));
 }
 
 int bt_ctf_trace_set_packet_header_field_type(struct bt_ctf_trace *trace,
                struct bt_ctf_field_type *packet_header_type)
 {
-       return bt_trace_common_set_packet_header_field_type(BT_TO_COMMON(trace),
+       return bt_ctf_trace_common_set_packet_header_field_type(BT_CTF_TO_COMMON(trace),
                (void *) packet_header_type);
 }
 
 const char *bt_ctf_trace_get_name(struct bt_ctf_trace *trace)
 {
-       return bt_trace_common_get_name(BT_TO_COMMON(trace));
+       return bt_ctf_trace_common_get_name(BT_CTF_TO_COMMON(trace));
 }
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