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 #define _GNU_SOURCE
  20 #include <assert.h>
  21 #include <errno.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <time.h>
  27 #include <sys/types.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 <common/sessiond-comm/sessiond-comm.h>
  34 #include <common/common.h>
  35
  36 #define SESSION1 "test1"
  37
  38 #define MAX_SESSIONS 10000
  39 #define RANDOM_STRING_LEN       11
  40
  41 /* Number of TAP tests in this file */
  42 #define NUM_TESTS 11
  43
  44 static struct ltt_session_list *session_list;
  45
  46 /* For error.h */
  47 int lttng_opt_quiet = 1;
  48 int lttng_opt_verbose = 0;
  49
  50 int ust_consumerd32_fd;
  51 int ust_consumerd64_fd;
  52
  53 static const char alphanum[] =
  54         "0123456789"
  55         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  56         "abcdefghijklmnopqrstuvwxyz";
  57 static char random_string[RANDOM_STRING_LEN];
  58
  59 /*
  60  * Return random string of 10 characters.
  61  * Not thread-safe.
  62  */
  63 static char *get_random_string(void)
  64 {
  65         int i;
  66
  67         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  68                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  69         }
  70
  71         random_string[RANDOM_STRING_LEN - 1] = '\0';
  72
  73         return random_string;
  74 }
  75
  76 /*
  77  * Return 0 if session name is found, else -1
  78  */
  79 static int find_session_name(char *name)
  80 {
  81         struct ltt_session *iter;
  82
  83         cds_list_for_each_entry(iter, &session_list->head, list) {
  84                 if (strcmp(iter->name, name) == 0) {
  85                         return 0;
  86                 }
  87         }
  88
  89         return -1;
  90 }
  91
  92 static int session_list_count(void)
  93 {
  94         int count = 0;
  95         struct ltt_session *iter;
  96
  97         cds_list_for_each_entry(iter, &session_list->head, list) {
  98                 count++;
  99         }
 100         return count;
 101 }
 102
 103 /*
 104  * Empty session list manually.
 105  */
 106 static void empty_session_list(void)
 107 {
 108         struct ltt_session *iter, *tmp;
 109
 110         cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 111                 cds_list_del(&iter->list);
 112                 free(iter);
 113         }
 114
 115         /* Session list must be 0 */
 116         assert(!session_list_count());
 117 }
 118
 119 /*
 120  * Test creation of 1 session
 121  */
 122 static int create_one_session(char *name)
 123 {
 124         int ret;
 125
 126         ret = session_create(name, geteuid(), getegid());
 127         if (ret == LTTNG_OK) {
 128                 /* Validate */
 129                 ret = find_session_name(name);
 130                 if (ret < 0) {
 131                         /* Session not found by name */
 132                         printf("session not found after creation\n");
 133                         return -1;
 134                 } else {
 135                         /* Success */
 136                         return 0;
 137                 }
 138         } else {
 139                 if (ret == LTTNG_ERR_EXIST_SESS) {
 140                         printf("(session already exists) ");
 141                 }
 142                 return -1;
 143         }
 144
 145         return 0;
 146 }
 147
 148 /*
 149  * Test deletion of 1 session
 150  */
 151 static int destroy_one_session(struct ltt_session *session)
 152 {
 153         int ret;
 154         char session_name[NAME_MAX];
 155
 156         strncpy(session_name, session->name, sizeof(session->name));
 157         session_name[sizeof(session_name) - 1] = '\0';
 158
 159         ret = session_destroy(session);
 160         if (ret == LTTNG_OK) {
 161                 ret = find_session_name(session_name);
 162                 if (ret < 0) {
 163                         /* Success, -1 means that the sesion is NOT found */
 164                         return 0;
 165                 } else {
 166                         /* Fail */
 167                         return -1;
 168                 }
 169         }
 170
 171         return 0;
 172 }
 173
 174 /*
 175  * This test is supposed to fail at the second create call. If so, return 0 for
 176  * test success, else -1.
 177  */
 178 static int two_session_same_name(void)
 179 {
 180         int ret;
 181         struct ltt_session *sess;
 182
 183         ret = create_one_session(SESSION1);
 184         if (ret < 0) {
 185                 /* Fail */
 186                 return -1;
 187         }
 188
 189         sess = session_find_by_name(SESSION1);
 190         if (sess) {
 191                 /* Success */
 192                 return 0;
 193         }
 194
 195         /* Fail */
 196         return -1;
 197 }
 198
 199 void test_session_list(void)
 200 {
 201         session_list = session_get_list();
 202         ok(session_list != NULL, "Session list: not NULL");
 203 }
 204
 205 void test_create_one_session(void)
 206 {
 207         ok(create_one_session(SESSION1) == 0,
 208            "Create session: %s",
 209            SESSION1);
 210 }
 211
 212 void test_validate_session(void)
 213 {
 214         struct ltt_session *tmp;
 215
 216         tmp = session_find_by_name(SESSION1);
 217
 218         ok(tmp != NULL,
 219            "Validating session: session found");
 220
 221         ok(tmp->kernel_session == NULL &&
 222            strlen(tmp->name),
 223            "Validating session: basic sanity check");
 224
 225         session_lock(tmp);
 226         session_unlock(tmp);
 227 }
 228
 229 void test_destroy_session(void)
 230 {
 231         struct ltt_session *tmp;
 232
 233         tmp = session_find_by_name(SESSION1);
 234
 235         ok(tmp != NULL,
 236            "Destroying session: session found");
 237
 238         ok(destroy_one_session(tmp) == 0,
 239            "Destroying session: %s destroyed",
 240            SESSION1);
 241 }
 242
 243 void test_duplicate_session(void)
 244 {
 245         ok(two_session_same_name() == 0,
 246            "Duplicate session creation");
 247 }
 248
 249 void test_bogus_session_param(void)
 250 {
 251         ok(create_one_session(NULL) < 0,
 252            "Create session with bogus param: NULL should fail");
 253
 254         ok(session_list_count() == 0,
 255            "Create session with bogus param: session list empty");
 256 }
 257
 258 void test_large_session_number(void)
 259 {
 260         int ret, i, failed = 0;
 261         struct ltt_session *iter, *tmp;
 262
 263         for (i = 0; i < MAX_SESSIONS; i++) {
 264                 char *tmp_name = get_random_string();
 265                 ret = create_one_session(tmp_name);
 266                 if (ret < 0) {
 267                         diag("session %d (name: %s) creation failed", i, tmp_name);
 268                         ++failed;
 269                 }
 270         }
 271
 272         ok(failed == 0,
 273            "Large sessions number: created %u sessions",
 274            MAX_SESSIONS);
 275
 276         failed = 0;
 277
 278         for (i = 0; i < MAX_SESSIONS; i++) {
 279                 cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 280                         ret = destroy_one_session(iter);
 281                         if (ret < 0) {
 282                                 diag("session %d destroy failed", i);
 283                                 ++failed;
 284                         }
 285                 }
 286         }
 287
 288         ok(failed == 0 && session_list_count() == 0,
 289            "Large sessions number: destroyed %u sessions",
 290            MAX_SESSIONS);
 291 }
 292
 293 int main(int argc, char **argv)
 294 {
 295         plan_tests(NUM_TESTS);
 296
 297         diag("Sessions unit tests");
 298
 299         test_session_list();
 300
 301         test_create_one_session();
 302
 303         test_validate_session();
 304
 305         test_destroy_session();
 306
 307         test_duplicate_session();
 308
 309         empty_session_list();
 310
 311         test_bogus_session_param();
 312
 313         test_large_session_number();
 314
 315         return exit_status();
 316 }