tests/unit/test_session.c

   1 /*
   2  * Copyright (c)  2011 David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * as published by the Free Software Foundation; only version 2
   7  * of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <assert.h>
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <time.h>
  26 #include <sys/types.h>
  27 #include <urcu.h>
  28
  29 #include <tap/tap.h>
  30
  31 #include <bin/lttng-sessiond/session.h>
  32 #include <bin/lttng-sessiond/ust-app.h>
  33 #include <bin/lttng-sessiond/ht-cleanup.h>
  34 #include <bin/lttng-sessiond/health-sessiond.h>
  35 #include <bin/lttng-sessiond/thread.h>
  36 #include <common/sessiond-comm/sessiond-comm.h>
  37 #include <common/common.h>
  38
  39 #define SESSION1 "test1"
  40
  41 #define MAX_SESSIONS 10000
  42 #define RANDOM_STRING_LEN       11
  43
  44 /* Number of TAP tests in this file */
  45 #define NUM_TESTS 11
  46
  47 struct health_app *health_sessiond;
  48 static struct ltt_session_list *session_list;
  49
  50 /* For error.h */
  51 int lttng_opt_quiet = 1;
  52 int lttng_opt_verbose = 0;
  53 int lttng_opt_mi;
  54
  55 int ust_consumerd32_fd;
  56 int ust_consumerd64_fd;
  57
  58 static const char alphanum[] =
  59         "0123456789"
  60         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  61         "abcdefghijklmnopqrstuvwxyz";
  62 static char random_string[RANDOM_STRING_LEN];
  63
  64 /*
  65  * Return random string of 10 characters.
  66  * Not thread-safe.
  67  */
  68 static char *get_random_string(void)
  69 {
  70         int i;
  71
  72         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  73                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  74         }
  75
  76         random_string[RANDOM_STRING_LEN - 1] = '\0';
  77
  78         return random_string;
  79 }
  80
  81 /*
  82  * Return 0 if session name is found, else -1
  83  */
  84 static int find_session_name(char *name)
  85 {
  86         struct ltt_session *iter;
  87
  88         cds_list_for_each_entry(iter, &session_list->head, list) {
  89                 if (strcmp(iter->name, name) == 0) {
  90                         return 0;
  91                 }
  92         }
  93
  94         return -1;
  95 }
  96
  97 static int session_list_count(void)
  98 {
  99         int count = 0;
 100         struct ltt_session *iter;
 101
 102         cds_list_for_each_entry(iter, &session_list->head, list) {
 103                 count++;
 104         }
 105         return count;
 106 }
 107
 108 /*
 109  * Empty session list manually.
 110  */
 111 static void empty_session_list(void)
 112 {
 113         struct ltt_session *iter, *tmp;
 114
 115         session_lock_list();
 116         cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 117                 session_destroy(iter);
 118         }
 119         session_unlock_list();
 120
 121         /* Session list must be 0 */
 122         assert(!session_list_count());
 123 }
 124
 125 /*
 126  * Test creation of 1 session
 127  */
 128 static int create_one_session(char *name)
 129 {
 130         int ret;
 131         enum lttng_error_code ret_code;
 132         struct ltt_session *session = NULL;
 133
 134         session_lock_list();
 135         ret_code = session_create(name, geteuid(), getegid(), &session);
 136         session_put(session);
 137         if (ret_code == LTTNG_OK) {
 138                 /* Validate */
 139                 ret = find_session_name(name);
 140                 if (ret < 0) {
 141                         /* Session not found by name */
 142                         printf("session not found after creation\n");
 143                         ret = -1;
 144                         goto end;
 145                 } else {
 146                         /* Success */
 147                         ret = 0;
 148                         goto end;
 149                 }
 150         } else {
 151                 if (ret_code == LTTNG_ERR_EXIST_SESS) {
 152                         printf("(session already exists) ");
 153                 }
 154                 ret = -1;
 155                 goto end;
 156         }
 157         ret = 0;
 158 end:
 159         session_unlock_list();
 160         return ret;
 161 }
 162
 163 /*
 164  * Test deletion of 1 session
 165  */
 166 static int destroy_one_session(struct ltt_session *session)
 167 {
 168         int ret;
 169         char session_name[NAME_MAX];
 170
 171         strncpy(session_name, session->name, sizeof(session_name));
 172         session_name[sizeof(session_name) - 1] = '\0';
 173
 174         session_destroy(session);
 175         session_put(session);
 176
 177         ret = find_session_name(session_name);
 178         if (ret < 0) {
 179                 /* Success, -1 means that the sesion is NOT found */
 180                 ret = 0;
 181         } else {
 182                 /* Fail */
 183                 ret = -1;
 184         }
 185         return ret;
 186 }
 187
 188 /*
 189  * This test is supposed to fail at the second create call. If so, return 0 for
 190  * test success, else -1.
 191  */
 192 static int two_session_same_name(void)
 193 {
 194         int ret;
 195         struct ltt_session *sess;
 196
 197         ret = create_one_session(SESSION1);
 198         if (ret < 0) {
 199                 /* Fail */
 200                 ret = -1;
 201                 goto end;
 202         }
 203
 204         session_lock_list();
 205         sess = session_find_by_name(SESSION1);
 206         if (sess) {
 207                 /* Success */
 208                 session_put(sess);
 209                 session_unlock_list();
 210                 ret = 0;
 211                 goto end_unlock;
 212         } else {
 213                 /* Fail */
 214                 ret = -1;
 215                 goto end_unlock;
 216         }
 217 end_unlock:
 218         session_unlock_list();
 219 end:
 220         return ret;
 221 }
 222
 223 void test_session_list(void)
 224 {
 225         session_list = session_get_list();
 226         ok(session_list != NULL, "Session list: not NULL");
 227 }
 228
 229 void test_create_one_session(void)
 230 {
 231         ok(create_one_session(SESSION1) == 0,
 232            "Create session: %s",
 233            SESSION1);
 234 }
 235
 236 void test_validate_session(void)
 237 {
 238         struct ltt_session *tmp;
 239
 240         session_lock_list();
 241         tmp = session_find_by_name(SESSION1);
 242
 243         ok(tmp != NULL,
 244            "Validating session: session found");
 245
 246         ok(tmp->kernel_session == NULL &&
 247            strlen(tmp->name),
 248            "Validating session: basic sanity check");
 249
 250         session_lock(tmp);
 251         session_unlock(tmp);
 252         session_put(tmp);
 253         session_unlock_list();
 254 }
 255
 256 void test_destroy_session(void)
 257 {
 258         struct ltt_session *tmp;
 259
 260         session_lock_list();
 261         tmp = session_find_by_name(SESSION1);
 262
 263         ok(tmp != NULL,
 264            "Destroying session: session found");
 265
 266         ok(destroy_one_session(tmp) == 0,
 267            "Destroying session: %s destroyed",
 268            SESSION1);
 269         session_unlock_list();
 270 }
 271
 272 void test_duplicate_session(void)
 273 {
 274         ok(two_session_same_name() == 0,
 275            "Duplicate session creation");
 276 }
 277
 278 void test_session_name_generation(void)
 279 {
 280         struct ltt_session *session = NULL;
 281         enum lttng_error_code ret_code;
 282         const char *expected_session_name_prefix = DEFAULT_SESSION_NAME;
 283
 284         session_lock_list();
 285         ret_code = session_create(NULL, geteuid(), getegid(), &session);
 286         ok(ret_code == LTTNG_OK,
 287                 "Create session with a NULL name (auto-generate a name)");
 288         if (!session) {
 289                 skip(1, "Skipping session name generation tests as session_create() failed.");
 290                 goto end;
 291         }
 292         diag("Automatically-generated session name: %s", *session->name ?
 293                 session->name : "ERROR");
 294         ok(*session->name && !strncmp(expected_session_name_prefix, session->name,
 295                         sizeof(DEFAULT_SESSION_NAME) - 1),
 296                         "Auto-generated session name starts with %s",
 297                         DEFAULT_SESSION_NAME);
 298 end:
 299         session_put(session);
 300         session_unlock_list();
 301 }
 302
 303 void test_large_session_number(void)
 304 {
 305         int ret, i, failed = 0;
 306         struct ltt_session *iter, *tmp;
 307
 308         for (i = 0; i < MAX_SESSIONS; i++) {
 309                 char *tmp_name = get_random_string();
 310                 ret = create_one_session(tmp_name);
 311                 if (ret < 0) {
 312                         diag("session %d (name: %s) creation failed", i, tmp_name);
 313                         ++failed;
 314                 }
 315         }
 316
 317         ok(failed == 0,
 318            "Large sessions number: created %u sessions",
 319            MAX_SESSIONS);
 320
 321         failed = 0;
 322
 323         session_lock_list();
 324         for (i = 0; i < MAX_SESSIONS; i++) {
 325                 cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 326                         assert(session_get(iter));
 327                         ret = destroy_one_session(iter);
 328                         if (ret < 0) {
 329                                 diag("session %d destroy failed", i);
 330                                 ++failed;
 331                         }
 332                 }
 333         }
 334         session_unlock_list();
 335
 336         ok(failed == 0 && session_list_count() == 0,
 337            "Large sessions number: destroyed %u sessions",
 338            MAX_SESSIONS);
 339 }
 340
 341 int main(int argc, char **argv)
 342 {
 343         struct lttng_thread *ht_cleanup_thread;
 344
 345         plan_tests(NUM_TESTS);
 346
 347         health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
 348         ht_cleanup_thread = launch_ht_cleanup_thread();
 349         assert(ht_cleanup_thread);
 350         lttng_thread_put(ht_cleanup_thread);
 351
 352         diag("Sessions unit tests");
 353
 354         rcu_register_thread();
 355
 356         test_session_list();
 357
 358         test_create_one_session();
 359
 360         test_validate_session();
 361
 362         test_destroy_session();
 363
 364         test_duplicate_session();
 365
 366         empty_session_list();
 367
 368         test_session_name_generation();
 369
 370         test_large_session_number();
 371
 372         rcu_unregister_thread();
 373         lttng_thread_list_shutdown_orphans();
 374
 375         return exit_status();
 376 }