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 <common/sessiond-comm/sessiond-comm.h>
  36 #include <common/common.h>
  37
  38 #define SESSION1 "test1"
  39
  40 #define MAX_SESSIONS 10000
  41 #define RANDOM_STRING_LEN       11
  42
  43 /* Number of TAP tests in this file */
  44 #define NUM_TESTS 11
  45
  46 struct health_app *health_sessiond;
  47 static struct ltt_session_list *session_list;
  48 static pthread_t ht_cleanup_thread;
  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
 132         ret = session_create(name, geteuid(), getegid());
 133         if (ret == LTTNG_OK) {
 134                 /* Validate */
 135                 ret = find_session_name(name);
 136                 if (ret < 0) {
 137                         /* Session not found by name */
 138                         printf("session not found after creation\n");
 139                         return -1;
 140                 } else {
 141                         /* Success */
 142                         return 0;
 143                 }
 144         } else {
 145                 if (ret == LTTNG_ERR_EXIST_SESS) {
 146                         printf("(session already exists) ");
 147                 }
 148                 return -1;
 149         }
 150
 151         return 0;
 152 }
 153
 154 /*
 155  * Test deletion of 1 session
 156  */
 157 static int destroy_one_session(struct ltt_session *session)
 158 {
 159         int ret;
 160         char session_name[NAME_MAX];
 161
 162         strncpy(session_name, session->name, sizeof(session_name));
 163         session_name[sizeof(session_name) - 1] = '\0';
 164
 165         session_destroy(session);
 166         session_put(session);
 167
 168         ret = find_session_name(session_name);
 169         if (ret < 0) {
 170                 /* Success, -1 means that the sesion is NOT found */
 171                 ret = 0;
 172         } else {
 173                 /* Fail */
 174                 ret = -1;
 175         }
 176         return ret;
 177 }
 178
 179 /*
 180  * This test is supposed to fail at the second create call. If so, return 0 for
 181  * test success, else -1.
 182  */
 183 static int two_session_same_name(void)
 184 {
 185         int ret;
 186         struct ltt_session *sess;
 187
 188         ret = create_one_session(SESSION1);
 189         if (ret < 0) {
 190                 /* Fail */
 191                 ret = -1;
 192                 goto end;
 193         }
 194
 195         session_lock_list();
 196         sess = session_find_by_name(SESSION1);
 197         if (sess) {
 198                 /* Success */
 199                 session_put(sess);
 200                 session_unlock_list();
 201                 ret = 0;
 202                 goto end_unlock;
 203         } else {
 204                 /* Fail */
 205                 ret = -1;
 206                 goto end_unlock;
 207         }
 208 end_unlock:
 209         session_unlock_list();
 210 end:
 211         return ret;
 212 }
 213
 214 void test_session_list(void)
 215 {
 216         session_list = session_get_list();
 217         ok(session_list != NULL, "Session list: not NULL");
 218 }
 219
 220 void test_create_one_session(void)
 221 {
 222         ok(create_one_session(SESSION1) == 0,
 223            "Create session: %s",
 224            SESSION1);
 225 }
 226
 227 void test_validate_session(void)
 228 {
 229         struct ltt_session *tmp;
 230
 231         session_lock_list();
 232         tmp = session_find_by_name(SESSION1);
 233
 234         ok(tmp != NULL,
 235            "Validating session: session found");
 236
 237         ok(tmp->kernel_session == NULL &&
 238            strlen(tmp->name),
 239            "Validating session: basic sanity check");
 240
 241         session_lock(tmp);
 242         session_unlock(tmp);
 243         session_put(tmp);
 244         session_unlock_list();
 245 }
 246
 247 void test_destroy_session(void)
 248 {
 249         struct ltt_session *tmp;
 250
 251         session_lock_list();
 252         tmp = session_find_by_name(SESSION1);
 253
 254         ok(tmp != NULL,
 255            "Destroying session: session found");
 256
 257         ok(destroy_one_session(tmp) == 0,
 258            "Destroying session: %s destroyed",
 259            SESSION1);
 260         session_unlock_list();
 261 }
 262
 263 void test_duplicate_session(void)
 264 {
 265         ok(two_session_same_name() == 0,
 266            "Duplicate session creation");
 267 }
 268
 269 void test_bogus_session_param(void)
 270 {
 271         ok(create_one_session(NULL) < 0,
 272            "Create session with bogus param: NULL should fail");
 273
 274         ok(session_list_count() == 0,
 275            "Create session with bogus param: session list empty");
 276 }
 277
 278 void test_large_session_number(void)
 279 {
 280         int ret, i, failed = 0;
 281         struct ltt_session *iter, *tmp;
 282
 283         for (i = 0; i < MAX_SESSIONS; i++) {
 284                 char *tmp_name = get_random_string();
 285                 ret = create_one_session(tmp_name);
 286                 if (ret < 0) {
 287                         diag("session %d (name: %s) creation failed", i, tmp_name);
 288                         ++failed;
 289                 }
 290         }
 291
 292         ok(failed == 0,
 293            "Large sessions number: created %u sessions",
 294            MAX_SESSIONS);
 295
 296         failed = 0;
 297
 298         session_lock_list();
 299         for (i = 0; i < MAX_SESSIONS; i++) {
 300                 cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 301                         assert(session_get(iter));
 302                         ret = destroy_one_session(iter);
 303                         if (ret < 0) {
 304                                 diag("session %d destroy failed", i);
 305                                 ++failed;
 306                         }
 307                 }
 308         }
 309         session_unlock_list();
 310
 311         ok(failed == 0 && session_list_count() == 0,
 312            "Large sessions number: destroyed %u sessions",
 313            MAX_SESSIONS);
 314 }
 315
 316 int main(int argc, char **argv)
 317 {
 318         plan_tests(NUM_TESTS);
 319
 320         health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
 321         assert(!init_ht_cleanup_thread(&ht_cleanup_thread));
 322
 323         diag("Sessions unit tests");
 324
 325         rcu_register_thread();
 326
 327         test_session_list();
 328
 329         test_create_one_session();
 330
 331         test_validate_session();
 332
 333         test_destroy_session();
 334
 335         test_duplicate_session();
 336
 337         empty_session_list();
 338
 339         test_bogus_session_param();
 340
 341         test_large_session_number();
 342
 343         rcu_unregister_thread();
 344         assert(!fini_ht_cleanup_thread(&ht_cleanup_thread));
 345
 346         return exit_status();
 347 }