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         cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 116                 session_destroy(iter);
 117         }
 118
 119         /* Session list must be 0 */
 120         assert(!session_list_count());
 121 }
 122
 123 /*
 124  * Test creation of 1 session
 125  */
 126 static int create_one_session(char *name)
 127 {
 128         int ret;
 129
 130         ret = session_create(name, geteuid(), getegid());
 131         if (ret == LTTNG_OK) {
 132                 /* Validate */
 133                 ret = find_session_name(name);
 134                 if (ret < 0) {
 135                         /* Session not found by name */
 136                         printf("session not found after creation\n");
 137                         return -1;
 138                 } else {
 139                         /* Success */
 140                         return 0;
 141                 }
 142         } else {
 143                 if (ret == LTTNG_ERR_EXIST_SESS) {
 144                         printf("(session already exists) ");
 145                 }
 146                 return -1;
 147         }
 148
 149         return 0;
 150 }
 151
 152 /*
 153  * Test deletion of 1 session
 154  */
 155 static int destroy_one_session(struct ltt_session *session)
 156 {
 157         int ret;
 158         char session_name[NAME_MAX];
 159
 160         strncpy(session_name, session->name, sizeof(session->name));
 161         session_name[sizeof(session_name) - 1] = '\0';
 162
 163         ret = session_destroy(session);
 164         if (ret == LTTNG_OK) {
 165                 ret = find_session_name(session_name);
 166                 if (ret < 0) {
 167                         /* Success, -1 means that the sesion is NOT found */
 168                         return 0;
 169                 } else {
 170                         /* Fail */
 171                         return -1;
 172                 }
 173         }
 174
 175         return 0;
 176 }
 177
 178 /*
 179  * This test is supposed to fail at the second create call. If so, return 0 for
 180  * test success, else -1.
 181  */
 182 static int two_session_same_name(void)
 183 {
 184         int ret;
 185         struct ltt_session *sess;
 186
 187         ret = create_one_session(SESSION1);
 188         if (ret < 0) {
 189                 /* Fail */
 190                 return -1;
 191         }
 192
 193         sess = session_find_by_name(SESSION1);
 194         if (sess) {
 195                 /* Success */
 196                 return 0;
 197         }
 198
 199         /* Fail */
 200         return -1;
 201 }
 202
 203 void test_session_list(void)
 204 {
 205         session_list = session_get_list();
 206         ok(session_list != NULL, "Session list: not NULL");
 207 }
 208
 209 void test_create_one_session(void)
 210 {
 211         ok(create_one_session(SESSION1) == 0,
 212            "Create session: %s",
 213            SESSION1);
 214 }
 215
 216 void test_validate_session(void)
 217 {
 218         struct ltt_session *tmp;
 219
 220         tmp = session_find_by_name(SESSION1);
 221
 222         ok(tmp != NULL,
 223            "Validating session: session found");
 224
 225         ok(tmp->kernel_session == NULL &&
 226            strlen(tmp->name),
 227            "Validating session: basic sanity check");
 228
 229         session_lock(tmp);
 230         session_unlock(tmp);
 231 }
 232
 233 void test_destroy_session(void)
 234 {
 235         struct ltt_session *tmp;
 236
 237         tmp = session_find_by_name(SESSION1);
 238
 239         ok(tmp != NULL,
 240            "Destroying session: session found");
 241
 242         ok(destroy_one_session(tmp) == 0,
 243            "Destroying session: %s destroyed",
 244            SESSION1);
 245 }
 246
 247 void test_duplicate_session(void)
 248 {
 249         ok(two_session_same_name() == 0,
 250            "Duplicate session creation");
 251 }
 252
 253 void test_bogus_session_param(void)
 254 {
 255         ok(create_one_session(NULL) < 0,
 256            "Create session with bogus param: NULL should fail");
 257
 258         ok(session_list_count() == 0,
 259            "Create session with bogus param: session list empty");
 260 }
 261
 262 void test_large_session_number(void)
 263 {
 264         int ret, i, failed = 0;
 265         struct ltt_session *iter, *tmp;
 266
 267         for (i = 0; i < MAX_SESSIONS; i++) {
 268                 char *tmp_name = get_random_string();
 269                 ret = create_one_session(tmp_name);
 270                 if (ret < 0) {
 271                         diag("session %d (name: %s) creation failed", i, tmp_name);
 272                         ++failed;
 273                 }
 274         }
 275
 276         ok(failed == 0,
 277            "Large sessions number: created %u sessions",
 278            MAX_SESSIONS);
 279
 280         failed = 0;
 281
 282         for (i = 0; i < MAX_SESSIONS; i++) {
 283                 cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 284                         ret = destroy_one_session(iter);
 285                         if (ret < 0) {
 286                                 diag("session %d destroy failed", i);
 287                                 ++failed;
 288                         }
 289                 }
 290         }
 291
 292         ok(failed == 0 && session_list_count() == 0,
 293            "Large sessions number: destroyed %u sessions",
 294            MAX_SESSIONS);
 295 }
 296
 297 int main(int argc, char **argv)
 298 {
 299         plan_tests(NUM_TESTS);
 300
 301         health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
 302         assert(!init_ht_cleanup_thread(&ht_cleanup_thread));
 303
 304         diag("Sessions unit tests");
 305
 306         rcu_register_thread();
 307
 308         test_session_list();
 309
 310         test_create_one_session();
 311
 312         test_validate_session();
 313
 314         test_destroy_session();
 315
 316         test_duplicate_session();
 317
 318         empty_session_list();
 319
 320         test_bogus_session_param();
 321
 322         test_large_session_number();
 323
 324         rcu_unregister_thread();
 325         assert(!fini_ht_cleanup_thread(&ht_cleanup_thread));
 326
 327         return exit_status();
 328 }