tests/regression/tools/notification/notification.c

   1 /*
   2  * notification.c
   3  *
   4  * Tests suite for LTTng notification API
   5  *
   6  * Copyright (C) 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
   7  *
   8  * SPDX-License-Identifier: MIT
   9  *
  10  */
  11
  12 #include <assert.h>
  13 #include <math.h>
  14 #include <stdbool.h>
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <unistd.h>
  19 #include <inttypes.h>
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <fcntl.h>
  23 #include <signal.h>
  24 #include <poll.h>
  25
  26 #include <common/compat/errno.h>
  27 #include <lttng/action/action.h>
  28 #include <lttng/action/notify.h>
  29 #include <lttng/condition/buffer-usage.h>
  30 #include <lttng/condition/condition.h>
  31 #include <lttng/condition/evaluation.h>
  32 #include <lttng/domain.h>
  33 #include <lttng/endpoint.h>
  34 #include <lttng/lttng-error.h>
  35 #include <lttng/notification/channel.h>
  36 #include <lttng/notification/notification.h>
  37 #include <lttng/trigger/trigger.h>
  38 #include <lttng/lttng.h>
  39
  40 #include <tap/tap.h>
  41
  42 #define NUM_TESTS 104
  43
  44 int nb_args = 0;
  45 int named_pipe_args_start = 0;
  46 pid_t app_pid = -1;
  47 const char *app_state_file = NULL;
  48
  49 static
  50 void wait_on_file(const char *path, bool file_exist)
  51 {
  52         if (!path) {
  53                 return;
  54         }
  55         for (;;) {
  56                 int ret;
  57                 struct stat buf;
  58
  59                 ret = stat(path, &buf);
  60                 if (ret == -1 && errno == ENOENT) {
  61                         if (file_exist) {
  62                                 /*
  63                                  * The file does not exist. wait a bit and
  64                                  * continue looping until it does.
  65                                  */
  66                                 (void) poll(NULL, 0, 10);
  67                                 continue;
  68                         }
  69
  70                         /*
  71                          * File does not exist and the exit condition we want.
  72                          * Break from the loop and return.
  73                          */
  74                         break;
  75                 }
  76                 if (ret) {
  77                         perror("stat");
  78                         exit(EXIT_FAILURE);
  79                 }
  80                 /*
  81                  * stat() returned 0, so the file exists. break now only if
  82                  * that's the exit condition we want.
  83                  */
  84                 if (file_exist) {
  85                         break;
  86                 }
  87         }
  88 }
  89
  90 static
  91 int write_pipe(const char *path, uint8_t data)
  92 {
  93         int ret = 0;
  94         int fd = 0;
  95
  96         fd = open(path, O_WRONLY | O_NONBLOCK);
  97         if (fd < 0) {
  98                 perror("Could not open consumer control named pipe");
  99                 goto end;
 100         }
 101
 102         ret = write(fd, &data , sizeof(data));
 103         if (ret < 1) {
 104                 perror("Named pipe write failed");
 105                 if (close(fd)) {
 106                         perror("Named pipe close failed");
 107                 }
 108                 ret = -1;
 109                 goto end;
 110         }
 111
 112         ret = close(fd);
 113         if (ret < 0) {
 114                 perror("Name pipe closing failed");
 115                 ret = -1;
 116                 goto end;
 117         }
 118 end:
 119         return ret;
 120 }
 121
 122 static
 123 int stop_consumer(const char **argv)
 124 {
 125         int ret = 0, i;
 126
 127         for (i = named_pipe_args_start; i < nb_args; i++) {
 128                 ret = write_pipe(argv[i], 49);
 129         }
 130         return ret;
 131 }
 132
 133 static
 134 int resume_consumer(const char **argv)
 135 {
 136         int ret = 0, i;
 137
 138         for (i = named_pipe_args_start; i < nb_args; i++) {
 139                 ret = write_pipe(argv[i], 0);
 140         }
 141         return ret;
 142 }
 143
 144 static
 145 int suspend_application(void)
 146 {
 147         int ret;
 148         struct stat buf;
 149
 150         if (!stat(app_state_file, &buf)) {
 151                 fail("App is already in a suspended state.");
 152                 ret = -1;
 153                 goto error;
 154         }
 155
 156         /*
 157          * Send SIGUSR1 to application instructing it to bypass tracepoint.
 158          */
 159         ret = kill(app_pid, SIGUSR1);
 160         if (ret) {
 161                 fail("SIGUSR1 failed. errno %d", errno);
 162                 ret = -1;
 163                 goto error;
 164         }
 165
 166         wait_on_file(app_state_file, true);
 167
 168 error:
 169         return ret;
 170
 171 }
 172
 173 static
 174 int resume_application(void)
 175 {
 176         int ret;
 177         struct stat buf;
 178
 179         ret = stat(app_state_file, &buf);
 180         if (ret == -1 && errno == ENOENT) {
 181                 fail("State file does not exist");
 182                 goto error;
 183         }
 184         if (ret) {
 185                 perror("stat");
 186                 goto error;
 187         }
 188
 189         ret = kill(app_pid, SIGUSR1);
 190         if (ret) {
 191                 fail("SIGUSR1 failed. errno %d", errno);
 192                 ret = -1;
 193                 goto error;
 194         }
 195
 196         wait_on_file(app_state_file, false);
 197
 198 error:
 199         return ret;
 200
 201 }
 202
 203
 204 static
 205 void test_triggers_buffer_usage_condition(const char *session_name,
 206                 const char *channel_name,
 207                 enum lttng_domain_type domain_type,
 208                 enum lttng_condition_type condition_type)
 209 {
 210         unsigned int test_vector_size = 5, i;
 211         enum lttng_condition_status condition_status;
 212         struct lttng_action *action;
 213
 214         /* Set-up */
 215         action = lttng_action_notify_create();
 216         if (!action) {
 217                 fail("Setup error on action creation");
 218                 goto end;
 219         }
 220
 221         /* Test lttng_register_trigger with null value */
 222         ok(lttng_register_trigger(NULL) == -LTTNG_ERR_INVALID, "Registering a NULL trigger fails as expected");
 223
 224         /* Test: register a trigger */
 225
 226         for (i = 0; i < pow(2,test_vector_size); i++) {
 227                 int loop_ret = 0;
 228                 char *test_tuple_string = NULL;
 229                 unsigned int mask_position = 0;
 230                 bool session_name_set = false;
 231                 bool channel_name_set = false;
 232                 bool threshold_ratio_set = false;
 233                 bool threshold_byte_set = false;
 234                 bool domain_type_set = false;
 235
 236                 struct lttng_trigger *trigger = NULL;
 237                 struct lttng_condition *condition = NULL;
 238
 239                 /* Create base condition */
 240                 switch (condition_type) {
 241                 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
 242                         condition = lttng_condition_buffer_usage_low_create();
 243                         break;
 244                 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
 245                         condition = lttng_condition_buffer_usage_high_create();
 246                         break;
 247                 default:
 248                         loop_ret = 1;
 249                         goto loop_end;
 250                 }
 251
 252                 if (!condition) {
 253                         loop_ret = 1;
 254                         goto loop_end;
 255
 256                 }
 257
 258                 /* Prepare the condition for trigger registration test */
 259
 260                 /* Set session name */
 261                 if ((1 << mask_position) & i) {
 262                         condition_status = lttng_condition_buffer_usage_set_session_name(
 263                                         condition, session_name);
 264                         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 265                                 loop_ret = 1;
 266                                 goto loop_end;
 267                         }
 268                         session_name_set = true;
 269                 }
 270                 mask_position++;
 271
 272                 /* Set channel name */
 273                 if ((1 << mask_position) & i) {
 274                         condition_status = lttng_condition_buffer_usage_set_channel_name(
 275                                         condition, channel_name);
 276                         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 277                                 loop_ret = 1;
 278                                 goto loop_end;
 279                         }
 280                         channel_name_set = true;
 281                 }
 282                 mask_position++;
 283
 284                 /* Set threshold ratio */
 285                 if ((1 << mask_position) & i) {
 286                         condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
 287                                         condition, 0.0);
 288                         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 289                                 loop_ret = 1;
 290                                 goto loop_end;
 291                         }
 292                         threshold_ratio_set = true;
 293                 }
 294                 mask_position++;
 295
 296                 /* Set threshold byte */
 297                 if ((1 << mask_position) & i) {
 298                         condition_status = lttng_condition_buffer_usage_set_threshold(
 299                                         condition, 0);
 300                         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 301                                 loop_ret = 1;
 302                                 goto loop_end;
 303                         }
 304                         threshold_byte_set = true;
 305                 }
 306                 mask_position++;
 307
 308                 /* Set domain type */
 309                 if ((1 << mask_position) & i) {
 310                         condition_status = lttng_condition_buffer_usage_set_domain_type(
 311                                         condition, LTTNG_DOMAIN_UST);
 312                         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 313                                 loop_ret = 1;
 314                                 goto loop_end;
 315                         }
 316                         domain_type_set = true;
 317                 }
 318
 319                 /* Safety check */
 320                 if (mask_position != test_vector_size -1) {
 321                         assert("Logic error for test vector generation");
 322                 }
 323
 324                 loop_ret = asprintf(&test_tuple_string, "session name %s, channel name %s, threshold ratio %s, threshold byte %s, domain type %s",
 325                                 session_name_set ? "set" : "unset",
 326                                 channel_name_set ? "set" : "unset",
 327                                 threshold_ratio_set ? "set" : "unset",
 328                                 threshold_byte_set ? "set" : "unset",
 329                                 domain_type_set? "set" : "unset");
 330                 if (!test_tuple_string || loop_ret < 0) {
 331                         loop_ret = 1;
 332                         goto loop_end;
 333                 }
 334
 335                 /* Create trigger */
 336                 trigger = lttng_trigger_create(condition, action);
 337                 if (!trigger) {
 338                         loop_ret = 1;
 339                         goto loop_end;
 340                 }
 341
 342                 loop_ret = lttng_register_trigger(trigger);
 343
 344 loop_end:
 345                 if (loop_ret == 1) {
 346                         fail("Setup error occurred for tuple: %s", test_tuple_string);
 347                         goto loop_cleanup;
 348                 }
 349
 350                 /* This combination happens three times */
 351                 if (session_name_set && channel_name_set
 352                                 && (threshold_ratio_set || threshold_byte_set)
 353                                 && domain_type_set) {
 354                         ok(loop_ret == 0, "Trigger is registered: %s", test_tuple_string);
 355
 356                         /*
 357                          * Test that a trigger cannot be registered
 358                          * multiple time.
 359                          */
 360                         loop_ret = lttng_register_trigger(trigger);
 361                         ok(loop_ret == -LTTNG_ERR_TRIGGER_EXISTS, "Re-register trigger fails as expected: %s", test_tuple_string);
 362
 363                         /* Test that a trigger can be unregistered */
 364                         loop_ret = lttng_unregister_trigger(trigger);
 365                         ok(loop_ret == 0, "Unregister trigger: %s", test_tuple_string);
 366
 367                         /*
 368                          * Test that unregistration of a non-previously
 369                          * registered trigger fail.
 370                          */
 371                         loop_ret = lttng_unregister_trigger(trigger);
 372                         ok(loop_ret == -LTTNG_ERR_TRIGGER_NOT_FOUND, "Unregister of a non-registered trigger fails as expected: %s", test_tuple_string);
 373                 } else {
 374                         ok(loop_ret == -LTTNG_ERR_INVALID_TRIGGER, "Trigger is invalid as expected and cannot be registered: %s", test_tuple_string);
 375                 }
 376
 377 loop_cleanup:
 378                 free(test_tuple_string);
 379                 lttng_trigger_destroy(trigger);
 380                 lttng_condition_destroy(condition);
 381         }
 382
 383 end:
 384         lttng_action_destroy(action);
 385 }
 386
 387 static
 388 void wait_data_pending(const char *session_name)
 389 {
 390         int ret;
 391
 392         do {
 393                 ret = lttng_data_pending(session_name);
 394                 assert(ret >= 0);
 395         } while (ret != 0);
 396 }
 397
 398 static
 399 int setup_buffer_usage_condition(struct lttng_condition *condition,
 400                 const char *condition_name,
 401                 const char *session_name,
 402                 const char *channel_name,
 403                 const enum lttng_domain_type domain_type)
 404 {
 405         enum lttng_condition_status condition_status;
 406         int ret = 0;
 407
 408         condition_status = lttng_condition_buffer_usage_set_session_name(
 409                         condition, session_name);
 410         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 411                 fail("Failed to set session name on creation of condition `%s`",
 412                                 condition_name);
 413                 ret = -1;
 414                 goto end;
 415         }
 416
 417         condition_status = lttng_condition_buffer_usage_set_channel_name(
 418                         condition, channel_name);
 419         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 420                 fail("Failed to set channel name on creation of condition `%s`",
 421                                 condition_name);
 422                 ret = -1;
 423                 goto end;
 424         }
 425
 426         condition_status = lttng_condition_buffer_usage_set_domain_type(
 427                         condition, domain_type);
 428         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 429                 fail("Failed to set domain type on creation of condition `%s`",
 430                                 condition_name);
 431                 ret = -1;
 432                 goto end;
 433         }
 434
 435 end:
 436         return ret;
 437 }
 438
 439 static
 440 void test_notification_channel(const char *session_name,
 441                 const char *channel_name,
 442                 const enum lttng_domain_type domain_type,
 443                 const char **argv)
 444 {
 445         int ret = 0;
 446         enum lttng_condition_status condition_status;
 447         enum lttng_notification_channel_status nc_status;
 448
 449         struct lttng_action *action = NULL;
 450         struct lttng_notification *notification = NULL;
 451         struct lttng_notification_channel *notification_channel = NULL;
 452         struct lttng_trigger *trigger = NULL;
 453
 454         struct lttng_condition *low_condition = NULL;
 455         struct lttng_condition *high_condition = NULL;
 456         struct lttng_condition *dummy_invalid_condition = NULL;
 457         struct lttng_condition *dummy_condition = NULL;
 458
 459         double low_ratio = 0.0;
 460         double high_ratio = 0.90;
 461
 462         /* Set-up */
 463         action = lttng_action_notify_create();
 464         if (!action) {
 465                 fail("Setup error on action creation");
 466                 goto end;
 467         }
 468
 469         /* Create a dummy, empty condition for later test */
 470         dummy_invalid_condition = lttng_condition_buffer_usage_low_create();
 471         if (!dummy_invalid_condition) {
 472                 fail("Setup error on condition creation");
 473                 goto end;
 474         }
 475
 476         /* Create a valid dummy condition with a ratio of 0.5 */
 477         dummy_condition = lttng_condition_buffer_usage_low_create();
 478         if (!dummy_condition) {
 479                 fail("Setup error on dummy_condition creation");
 480                 goto end;
 481
 482         }
 483         condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
 484                         dummy_condition, 0.5);
 485         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 486                 fail("Setup error on condition creation");
 487                 goto end;
 488         }
 489
 490         ret = setup_buffer_usage_condition(dummy_condition, "dummy_condition",
 491                         session_name, channel_name, domain_type);
 492         if (ret) {
 493                 fail("Setup error on dummy condition creation");
 494                 goto end;
 495         }
 496
 497         /* Register a low condition with a ratio */
 498         low_condition = lttng_condition_buffer_usage_low_create();
 499         if (!low_condition) {
 500                 fail("Setup error on low_condition creation");
 501                 goto end;
 502         }
 503         condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
 504                         low_condition, low_ratio);
 505         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 506                 fail("Setup error on low_condition creation");
 507                 goto end;
 508         }
 509
 510         ret = setup_buffer_usage_condition(low_condition, "low_condition",
 511                         session_name, channel_name, domain_type);
 512         if (ret) {
 513                 fail("Setup error on low condition creation");
 514                 goto end;
 515         }
 516
 517         /* Register a high condition with a ratio */
 518         high_condition = lttng_condition_buffer_usage_high_create();
 519         if (!high_condition) {
 520                 fail("Setup error on high_condition creation");
 521                 goto end;
 522         }
 523
 524         condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
 525                         high_condition, high_ratio);
 526         if (condition_status != LTTNG_CONDITION_STATUS_OK) {
 527                 fail("Setup error on high_condition creation");
 528                 goto end;
 529         }
 530
 531         ret = setup_buffer_usage_condition(high_condition, "high_condition",
 532                         session_name, channel_name, domain_type);
 533         if (ret) {
 534                 fail("Setup error on high condition creation");
 535                 goto end;
 536         }
 537
 538         /* Register the triggers for low and high condition */
 539         trigger = lttng_trigger_create(low_condition, action);
 540         if (!trigger) {
 541                 fail("Setup error on low trigger creation");
 542                 goto end;
 543         }
 544
 545         ret = lttng_register_trigger(trigger);
 546         if (ret) {
 547                 fail("Setup error on low trigger registration");
 548                 goto end;
 549         }
 550
 551         lttng_trigger_destroy(trigger);
 552         trigger = NULL;
 553
 554         trigger = lttng_trigger_create(high_condition, action);
 555         if (!trigger) {
 556                 fail("Setup error on high trigger creation");
 557                 goto end;
 558         }
 559
 560         ret = lttng_register_trigger(trigger);
 561         if (ret) {
 562                 fail("Setup error on high trigger registration");
 563                 goto end;
 564         }
 565
 566         /* Begin testing */
 567         notification_channel = lttng_notification_channel_create(lttng_session_daemon_notification_endpoint);
 568         ok(notification_channel, "Notification channel object creation");
 569         if (!notification_channel) {
 570                 goto end;
 571         }
 572
 573         /* Basic error path check */
 574         nc_status = lttng_notification_channel_subscribe(NULL, NULL);
 575         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID, "Notification channel subscription is invalid: NULL, NULL");
 576
 577         nc_status = lttng_notification_channel_subscribe(notification_channel, NULL);
 578         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID, "Notification channel subscription is invalid: NON-NULL, NULL");
 579
 580         nc_status = lttng_notification_channel_subscribe(NULL, low_condition);
 581         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID, "Notification channel subscription is invalid: NULL, NON-NULL");
 582
 583         nc_status = lttng_notification_channel_subscribe(notification_channel, dummy_invalid_condition);
 584         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID, "Subscribing to an invalid condition");
 585
 586         nc_status = lttng_notification_channel_unsubscribe(notification_channel, dummy_invalid_condition);
 587         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID, "Unsubscribing from an invalid condition");
 588
 589         nc_status = lttng_notification_channel_unsubscribe(notification_channel, dummy_condition);
 590         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_UNKNOWN_CONDITION, "Unsubscribing from a valid unknown condition");
 591
 592         /* Subscribe a valid low condition */
 593         nc_status = lttng_notification_channel_subscribe(notification_channel, low_condition);
 594         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK, "Subscribe to condition");
 595
 596         /* Subscribe a valid high condition */
 597         nc_status = lttng_notification_channel_subscribe(notification_channel, high_condition);
 598         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK, "Subscribe to condition");
 599
 600         nc_status = lttng_notification_channel_subscribe(notification_channel, low_condition);
 601         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_ALREADY_SUBSCRIBED, "Subscribe to a condition for which subscription was already done");
 602
 603         nc_status = lttng_notification_channel_subscribe(notification_channel, high_condition);
 604         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_ALREADY_SUBSCRIBED, "Subscribe to a condition for which subscription was already done");
 605
 606         /* Wait for notification to happen */
 607         stop_consumer(argv);
 608         lttng_start_tracing(session_name);
 609
 610         /* Wait for high notification */
 611         do {
 612                 nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
 613         } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
 614         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK
 615                         && notification
 616                         && lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
 617                         "High notification received after intermediary communication");
 618         lttng_notification_destroy(notification);
 619         notification = NULL;
 620
 621         suspend_application();
 622         lttng_stop_tracing_no_wait(session_name);
 623         resume_consumer(argv);
 624         wait_data_pending(session_name);
 625
 626         /*
 627          * Test that communication still work even if there is notification
 628          * waiting for consumption.
 629          */
 630
 631         nc_status = lttng_notification_channel_unsubscribe(notification_channel, low_condition);
 632         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK, "Unsubscribe with pending notification");
 633
 634         nc_status = lttng_notification_channel_subscribe(notification_channel, low_condition);
 635         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK, "subscribe with pending notification");
 636
 637         do {
 638                 nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
 639         } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
 640         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK
 641                         && notification
 642                         && lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW,
 643                         "Low notification received after intermediary communication");
 644         lttng_notification_destroy(notification);
 645         notification = NULL;
 646
 647         /* Stop consumer to force a high notification */
 648         stop_consumer(argv);
 649         resume_application();
 650         lttng_start_tracing(session_name);
 651
 652         do {
 653                 nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
 654         } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
 655         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
 656                         lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
 657                         "High notification received after intermediary communication");
 658         lttng_notification_destroy(notification);
 659         notification = NULL;
 660
 661         suspend_application();
 662         lttng_stop_tracing_no_wait(session_name);
 663         resume_consumer(argv);
 664         wait_data_pending(session_name);
 665
 666         do {
 667                 nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
 668         } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
 669         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
 670                         lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW,
 671                         "Low notification received after re-subscription");
 672         lttng_notification_destroy(notification);
 673         notification = NULL;
 674
 675         stop_consumer(argv);
 676         resume_application();
 677         /* Stop consumer to force a high notification */
 678         lttng_start_tracing(session_name);
 679
 680         do {
 681                 nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
 682         } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
 683         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
 684                         lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
 685                         "High notification");
 686         lttng_notification_destroy(notification);
 687         notification = NULL;
 688
 689         /* Resume consumer to allow event consumption */
 690         suspend_application();
 691         lttng_stop_tracing_no_wait(session_name);
 692         resume_consumer(argv);
 693         wait_data_pending(session_name);
 694
 695         nc_status = lttng_notification_channel_unsubscribe(notification_channel, low_condition);
 696         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK, "Unsubscribe low condition with pending notification");
 697         nc_status = lttng_notification_channel_unsubscribe(notification_channel, high_condition);
 698         ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK, "Unsubscribe high condition with pending notification");
 699
 700 end:
 701         lttng_notification_channel_destroy(notification_channel);
 702         lttng_trigger_destroy(trigger);
 703         lttng_action_destroy(action);
 704         lttng_condition_destroy(low_condition);
 705         lttng_condition_destroy(high_condition);
 706         lttng_condition_destroy(dummy_invalid_condition);
 707         lttng_condition_destroy(dummy_condition);
 708 }
 709
 710 int main(int argc, const char *argv[])
 711 {
 712         const char *session_name = NULL;
 713         const char *channel_name = NULL;
 714         const char *domain_type_string = NULL;
 715         enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE;
 716
 717         plan_tests(NUM_TESTS);
 718
 719         /* Argument 6 and upward are named pipe location for consumerd control */
 720         named_pipe_args_start = 6;
 721
 722         if (argc < 7) {
 723                 fail("Missing parameter for tests to run %d", argc);
 724                 goto error;
 725         }
 726
 727         nb_args = argc;
 728
 729         domain_type_string = argv[1];
 730         session_name = argv[2];
 731         channel_name = argv[3];
 732         app_pid = (pid_t) atoi(argv[4]);
 733         app_state_file = argv[5];
 734
 735         if (!strcmp("LTTNG_DOMAIN_UST", domain_type_string)) {
 736                 domain_type = LTTNG_DOMAIN_UST;
 737         }
 738         if (!strcmp("LTTNG_DOMAIN_KERNEL", domain_type_string)) {
 739                 domain_type = LTTNG_DOMAIN_KERNEL;
 740         }
 741         if (domain_type == LTTNG_DOMAIN_NONE) {
 742                 fail("Unknown domain type");
 743                 goto error;
 744         }
 745
 746         diag("Test trigger for domain %s with buffer_usage_low condition", domain_type_string);
 747         test_triggers_buffer_usage_condition(session_name, channel_name, domain_type, LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW);
 748         diag("Test trigger for domain %s with buffer_usage_high condition", domain_type_string);
 749         test_triggers_buffer_usage_condition(session_name, channel_name, domain_type, LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH);
 750
 751         diag("Test notification channel api for domain %s", domain_type_string);
 752         test_notification_channel(session_name, channel_name, domain_type, argv);
 753 error:
 754         return exit_status();
 755 }
 756