lib/trace-ir/event-class.c

   1 /*
   2  * event-class.c
   3  *
   4  * Babeltrace trace IR - Event class
   5  *
   6  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #define BT_LOG_TAG "EVENT-CLASS"
  30 #include <babeltrace/lib-logging-internal.h>
  31
  32 #include <babeltrace/assert-pre-internal.h>
  33 #include <babeltrace/trace-ir/clock-value-internal.h>
  34 #include <babeltrace/trace-ir/fields-internal.h>
  35 #include <babeltrace/trace-ir/field-classes.h>
  36 #include <babeltrace/trace-ir/field-classes-internal.h>
  37 #include <babeltrace/trace-ir/event-class.h>
  38 #include <babeltrace/trace-ir/event-class-internal.h>
  39 #include <babeltrace/trace-ir/event-internal.h>
  40 #include <babeltrace/trace-ir/stream-class.h>
  41 #include <babeltrace/trace-ir/stream-class-internal.h>
  42 #include <babeltrace/trace-ir/trace-internal.h>
  43 #include <babeltrace/trace-ir/utils-internal.h>
  44 #include <babeltrace/trace-ir/resolve-field-path-internal.h>
  45 #include <babeltrace/object.h>
  46 #include <babeltrace/trace-ir/attributes-internal.h>
  47 #include <babeltrace/compiler-internal.h>
  48 #include <babeltrace/endian-internal.h>
  49 #include <babeltrace/types.h>
  50 #include <babeltrace/values-internal.h>
  51 #include <babeltrace/assert-internal.h>
  52 #include <inttypes.h>
  53 #include <stdlib.h>
  54
  55 #define BT_ASSERT_PRE_EVENT_CLASS_HOT(_ec) \
  56         BT_ASSERT_PRE_HOT((_ec), "Event class", ": %!+E", (_ec))
  57
  58 static
  59 void destroy_event_class(struct bt_object *obj)
  60 {
  61         struct bt_event_class *event_class = (void *) obj;
  62
  63         BT_LIB_LOGD("Destroying event class: %!+E", event_class);
  64
  65         if (event_class->name.str) {
  66                 g_string_free(event_class->name.str, TRUE);
  67         }
  68
  69         if (event_class->emf_uri.str) {
  70                 g_string_free(event_class->emf_uri.str, TRUE);
  71         }
  72
  73         BT_LOGD_STR("Putting context field classe.");
  74         bt_object_put_ref(event_class->specific_context_fc);
  75         BT_LOGD_STR("Putting payload field classe.");
  76         bt_object_put_ref(event_class->payload_fc);
  77         bt_object_pool_finalize(&event_class->event_pool);
  78         g_free(obj);
  79 }
  80
  81 static
  82 void free_event(struct bt_event *event,
  83                 struct bt_event_class *event_class)
  84 {
  85         bt_event_destroy(event);
  86 }
  87
  88 BT_ASSERT_PRE_FUNC
  89 static
  90 bool event_class_id_is_unique(struct bt_stream_class *stream_class, uint64_t id)
  91 {
  92         uint64_t i;
  93         bool is_unique = true;
  94
  95         for (i = 0; i < stream_class->event_classes->len; i++) {
  96                 struct bt_event_class *ec =
  97                         stream_class->event_classes->pdata[i];
  98
  99                 if (ec->id == id) {
 100                         is_unique = false;
 101                         goto end;
 102                 }
 103         }
 104
 105 end:
 106         return is_unique;
 107 }
 108
 109 static
 110 struct bt_event_class *create_event_class_with_id(
 111                 struct bt_stream_class *stream_class, uint64_t id)
 112 {
 113         int ret;
 114         struct bt_event_class *event_class;
 115
 116         BT_ASSERT(stream_class);
 117         BT_ASSERT_PRE(event_class_id_is_unique(stream_class, id),
 118                 "Duplicate event class ID: %![sc-]+S, id=%" PRIu64,
 119                 stream_class, id);
 120         BT_LIB_LOGD("Creating event class object: %![sc-]+S, id=%" PRIu64,
 121                 stream_class, id);
 122         event_class = g_new0(struct bt_event_class, 1);
 123         if (!event_class) {
 124                 BT_LOGE_STR("Failed to allocate one event class.");
 125                 goto error;
 126         }
 127
 128         bt_object_init_shared_with_parent(&event_class->base,
 129                 destroy_event_class);
 130         event_class->id = id;
 131         bt_property_uint_init(&event_class->log_level,
 132                         BT_PROPERTY_AVAILABILITY_NOT_AVAILABLE, 0);
 133         event_class->name.str = g_string_new(NULL);
 134         if (!event_class->name.str) {
 135                 BT_LOGE_STR("Failed to allocate a GString.");
 136                 ret = -1;
 137                 goto end;
 138         }
 139
 140         event_class->emf_uri.str = g_string_new(NULL);
 141         if (!event_class->emf_uri.str) {
 142                 BT_LOGE_STR("Failed to allocate a GString.");
 143                 ret = -1;
 144                 goto end;
 145         }
 146
 147         ret = bt_object_pool_initialize(&event_class->event_pool,
 148                 (bt_object_pool_new_object_func) bt_event_new,
 149                 (bt_object_pool_destroy_object_func) free_event,
 150                 event_class);
 151         if (ret) {
 152                 BT_LOGE("Failed to initialize event pool: ret=%d",
 153                         ret);
 154                 goto error;
 155         }
 156
 157         bt_object_set_parent(&event_class->base, &stream_class->base);
 158         g_ptr_array_add(stream_class->event_classes, event_class);
 159         bt_stream_class_freeze(stream_class);
 160         BT_LIB_LOGD("Created event class object: %!+E", event_class);
 161         goto end;
 162
 163 error:
 164         BT_OBJECT_PUT_REF_AND_RESET(event_class);
 165
 166 end:
 167         return event_class;
 168 }
 169
 170 struct bt_event_class *bt_event_class_create(
 171                 struct bt_stream_class *stream_class)
 172 {
 173         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 174         BT_ASSERT_PRE(stream_class->assigns_automatic_event_class_id,
 175                 "Stream class does not automatically assigns event class IDs: "
 176                 "%![sc-]+S", stream_class);
 177         return create_event_class_with_id(stream_class,
 178                 (uint64_t) stream_class->event_classes->len);
 179 }
 180
 181 struct bt_event_class *bt_event_class_create_with_id(
 182                 struct bt_stream_class *stream_class, uint64_t id)
 183 {
 184         BT_ASSERT_PRE(!stream_class->assigns_automatic_event_class_id,
 185                 "Stream class automatically assigns event class IDs: "
 186                 "%![sc-]+S", stream_class);
 187         return create_event_class_with_id(stream_class, id);
 188 }
 189
 190 const char *bt_event_class_get_name(struct bt_event_class *event_class)
 191 {
 192         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 193         return event_class->name.value;
 194 }
 195
 196 int bt_event_class_set_name(struct bt_event_class *event_class,
 197                 const char *name)
 198 {
 199         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 200         BT_ASSERT_PRE_NON_NULL(name, "Name");
 201         BT_ASSERT_PRE_EVENT_CLASS_HOT(event_class);
 202         g_string_assign(event_class->name.str, name);
 203         event_class->name.value = event_class->name.str->str;
 204         BT_LIB_LOGV("Set event class's name: %!+E", event_class);
 205         return 0;
 206 }
 207
 208 uint64_t bt_event_class_get_id(struct bt_event_class *event_class)
 209 {
 210         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 211         return event_class->id;
 212 }
 213
 214 enum bt_property_availability bt_event_class_get_log_level(
 215                 struct bt_event_class *event_class,
 216                 enum bt_event_class_log_level *log_level)
 217 {
 218         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 219         BT_ASSERT_PRE_NON_NULL(log_level, "Log level (output)");
 220         *log_level = (enum bt_event_class_log_level)
 221                 event_class->log_level.value;
 222         return event_class->log_level.base.avail;
 223 }
 224
 225 int bt_event_class_set_log_level(struct bt_event_class *event_class,
 226                 enum bt_event_class_log_level log_level)
 227 {
 228         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 229         BT_ASSERT_PRE_EVENT_CLASS_HOT(event_class);
 230         bt_property_uint_set(&event_class->log_level,
 231                 (uint64_t) log_level);
 232         BT_LIB_LOGV("Set event class's log level: %!+E", event_class);
 233         return 0;
 234 }
 235
 236 const char *bt_event_class_get_emf_uri(struct bt_event_class *event_class)
 237 {
 238         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 239         return event_class->emf_uri.value;
 240 }
 241
 242 int bt_event_class_set_emf_uri(struct bt_event_class *event_class,
 243                 const char *emf_uri)
 244 {
 245         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 246         BT_ASSERT_PRE_NON_NULL(emf_uri, "EMF URI");
 247         BT_ASSERT_PRE_EVENT_CLASS_HOT(event_class);
 248         g_string_assign(event_class->emf_uri.str, emf_uri);
 249         event_class->emf_uri.value = event_class->emf_uri.str->str;
 250         BT_LIB_LOGV("Set event class's EMF URI: %!+E", event_class);
 251         return 0;
 252 }
 253
 254 struct bt_stream_class *bt_event_class_borrow_stream_class(
 255                 struct bt_event_class *event_class)
 256 {
 257         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 258         return bt_event_class_borrow_stream_class_inline(event_class);
 259 }
 260
 261 struct bt_field_class *bt_event_class_borrow_specific_context_field_class(
 262                 struct bt_event_class *event_class)
 263 {
 264         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 265         return event_class->specific_context_fc;
 266 }
 267
 268 int bt_event_class_set_specific_context_field_class(
 269                 struct bt_event_class *event_class,
 270                 struct bt_field_class *field_class)
 271 {
 272         int ret;
 273         struct bt_stream_class *stream_class;
 274         struct bt_trace *trace;
 275         struct bt_resolve_field_path_context resolve_ctx = {
 276                 .packet_header = NULL,
 277                 .packet_context = NULL,
 278                 .event_header = NULL,
 279                 .event_common_context = NULL,
 280                 .event_specific_context = field_class,
 281                 .event_payload = NULL,
 282         };
 283
 284         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 285         BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
 286         BT_ASSERT_PRE_EVENT_CLASS_HOT(event_class);
 287         BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
 288                 BT_FIELD_CLASS_TYPE_STRUCTURE,
 289                 "Specific context field classe is not a structure field classe: "
 290                 "%!+F", field_class);
 291         stream_class = bt_event_class_borrow_stream_class_inline(
 292                 event_class);
 293         trace = bt_stream_class_borrow_trace_inline(stream_class);
 294         resolve_ctx.packet_header = trace->packet_header_fc;
 295         resolve_ctx.packet_context = stream_class->packet_context_fc;
 296         resolve_ctx.event_header = stream_class->event_header_fc;
 297         resolve_ctx.event_common_context =
 298                 stream_class->event_common_context_fc;
 299
 300         ret = bt_resolve_field_paths(field_class, &resolve_ctx);
 301         if (ret) {
 302                 goto end;
 303         }
 304
 305         bt_field_class_make_part_of_trace(field_class);
 306         bt_object_put_ref(event_class->specific_context_fc);
 307         event_class->specific_context_fc = bt_object_get_ref(field_class);
 308         bt_field_class_freeze(field_class);
 309         BT_LIB_LOGV("Set event class's specific context field classe: %!+E",
 310                 event_class);
 311
 312 end:
 313         return ret;
 314 }
 315
 316 struct bt_field_class *bt_event_class_borrow_payload_field_class(
 317                 struct bt_event_class *event_class)
 318 {
 319         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 320         return event_class->payload_fc;
 321 }
 322
 323 int bt_event_class_set_payload_field_class(struct bt_event_class *event_class,
 324                 struct bt_field_class *field_class)
 325 {
 326         int ret;
 327         struct bt_stream_class *stream_class;
 328         struct bt_trace *trace;
 329         struct bt_resolve_field_path_context resolve_ctx = {
 330                 .packet_header = NULL,
 331                 .packet_context = NULL,
 332                 .event_header = NULL,
 333                 .event_common_context = NULL,
 334                 .event_specific_context = NULL,
 335                 .event_payload = field_class,
 336         };
 337
 338         BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
 339         BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
 340         BT_ASSERT_PRE_EVENT_CLASS_HOT(event_class);
 341         BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
 342                 BT_FIELD_CLASS_TYPE_STRUCTURE,
 343                 "Payload field classe is not a structure field classe: %!+F",
 344                 field_class);
 345         stream_class = bt_event_class_borrow_stream_class_inline(
 346                 event_class);
 347         trace = bt_stream_class_borrow_trace_inline(stream_class);
 348         resolve_ctx.packet_header = trace->packet_header_fc;
 349         resolve_ctx.packet_context = stream_class->packet_context_fc;
 350         resolve_ctx.event_header = stream_class->event_header_fc;
 351         resolve_ctx.event_common_context =
 352                 stream_class->event_common_context_fc;
 353         resolve_ctx.event_specific_context = event_class->specific_context_fc;
 354
 355         ret = bt_resolve_field_paths(field_class, &resolve_ctx);
 356         if (ret) {
 357                 goto end;
 358         }
 359
 360         bt_field_class_make_part_of_trace(field_class);
 361         bt_object_put_ref(event_class->payload_fc);
 362         event_class->payload_fc = bt_object_get_ref(field_class);
 363         bt_field_class_freeze(field_class);
 364         BT_LIB_LOGV("Set event class's payload field classe: %!+E", event_class);
 365
 366 end:
 367         return ret;
 368 }
 369
 370 BT_HIDDEN
 371 void _bt_event_class_freeze(struct bt_event_class *event_class)
 372 {
 373         /* The field classes are already frozen */
 374         BT_ASSERT(event_class);
 375         BT_LIB_LOGD("Freezing event class: %!+E", event_class);
 376         event_class->frozen = true;
 377 }