tests/unit/test_session.cpp

   1 /*
   2  * Copyright (C) 2011 EfficiOS Inc.
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <sys/types.h>
  12 #include <time.h>
  13 #include <unistd.h>
  14 #include <urcu.h>
  15
  16 #include <tap/tap.h>
  17
  18 #include <bin/lttng-sessiond/health-sessiond.hpp>
  19 #include <bin/lttng-sessiond/session.hpp>
  20 #include <bin/lttng-sessiond/thread.hpp>
  21 #include <bin/lttng-sessiond/ust-app.hpp>
  22 #include <common/common.hpp>
  23 #include <common/compat/errno.hpp>
  24 #include <common/sessiond-comm/sessiond-comm.hpp>
  25
  26 #define SESSION1 "test1"
  27
  28 #define MAX_SESSIONS 10000
  29 #define RANDOM_STRING_LEN       11
  30
  31 /* Number of TAP tests in this file */
  32 #define NUM_TESTS 11
  33
  34 static struct ltt_session_list *session_list;
  35
  36 static const char alphanum[] =
  37         "0123456789"
  38         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  39         "abcdefghijklmnopqrstuvwxyz";
  40 static char random_string[RANDOM_STRING_LEN];
  41
  42 /*
  43  * Return random string of 10 characters.
  44  * Not thread-safe.
  45  */
  46 static char *get_random_string(void)
  47 {
  48         int i;
  49
  50         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  51                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  52         }
  53
  54         random_string[RANDOM_STRING_LEN - 1] = '\0';
  55
  56         return random_string;
  57 }
  58
  59 /*
  60  * Return 0 if session name is found, else -1
  61  */
  62 static int find_session_name(const char *name)
  63 {
  64         struct ltt_session *iter;
  65
  66         cds_list_for_each_entry(iter, &session_list->head, list) {
  67                 if (strcmp(iter->name, name) == 0) {
  68                         return 0;
  69                 }
  70         }
  71
  72         return -1;
  73 }
  74
  75 static int session_list_count(void)
  76 {
  77         int count = 0;
  78         struct ltt_session *iter;
  79
  80         cds_list_for_each_entry(iter, &session_list->head, list) {
  81                 count++;
  82         }
  83         return count;
  84 }
  85
  86 /*
  87  * Empty session list manually.
  88  */
  89 static void empty_session_list(void)
  90 {
  91         struct ltt_session *iter, *tmp;
  92
  93         session_lock_list();
  94         cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
  95                 session_destroy(iter);
  96         }
  97         session_unlock_list();
  98
  99         /* Session list must be 0 */
 100         LTTNG_ASSERT(!session_list_count());
 101 }
 102
 103 /*
 104  * Test creation of 1 session
 105  */
 106 static int create_one_session(const char *name)
 107 {
 108         int ret;
 109         enum lttng_error_code ret_code;
 110         struct ltt_session *session = NULL;
 111
 112         session_lock_list();
 113         ret_code = session_create(name, geteuid(), getegid(), &session);
 114         session_put(session);
 115         if (ret_code == LTTNG_OK) {
 116                 /* Validate */
 117                 ret = find_session_name(name);
 118                 if (ret < 0) {
 119                         /* Session not found by name */
 120                         printf("session not found after creation\n");
 121                         ret = -1;
 122                 } else {
 123                         /* Success */
 124                         ret = 0;
 125                 }
 126         } else {
 127                 if (ret_code == LTTNG_ERR_EXIST_SESS) {
 128                         printf("(session already exists) ");
 129                 }
 130                 ret = -1;
 131         }
 132
 133         session_unlock_list();
 134         return ret;
 135 }
 136
 137 /*
 138  * Test deletion of 1 session
 139  */
 140 static int destroy_one_session(struct ltt_session *session)
 141 {
 142         int ret;
 143         char session_name[NAME_MAX];
 144
 145         strncpy(session_name, session->name, sizeof(session_name));
 146         session_name[sizeof(session_name) - 1] = '\0';
 147
 148         session_destroy(session);
 149         session_put(session);
 150
 151         ret = find_session_name(session_name);
 152         if (ret < 0) {
 153                 /* Success, -1 means that the sesion is NOT found */
 154                 ret = 0;
 155         } else {
 156                 /* Fail */
 157                 ret = -1;
 158         }
 159         return ret;
 160 }
 161
 162 /*
 163  * This test is supposed to fail at the second create call. If so, return 0 for
 164  * test success, else -1.
 165  */
 166 static int two_session_same_name(void)
 167 {
 168         int ret;
 169         struct ltt_session *sess;
 170
 171         ret = create_one_session(SESSION1);
 172         if (ret < 0) {
 173                 /* Fail */
 174                 ret = -1;
 175                 goto end;
 176         }
 177
 178         session_lock_list();
 179         sess = session_find_by_name(SESSION1);
 180         if (sess) {
 181                 /* Success */
 182                 session_put(sess);
 183                 session_unlock_list();
 184                 ret = 0;
 185                 goto end_unlock;
 186         } else {
 187                 /* Fail */
 188                 ret = -1;
 189                 goto end_unlock;
 190         }
 191 end_unlock:
 192         session_unlock_list();
 193 end:
 194         return ret;
 195 }
 196
 197 static void test_session_list(void)
 198 {
 199         session_list = session_get_list();
 200         ok(session_list != NULL, "Session list: not NULL");
 201 }
 202
 203 static void test_create_one_session(void)
 204 {
 205         ok(create_one_session(SESSION1) == 0,
 206            "Create session: %s",
 207            SESSION1);
 208 }
 209
 210 static void test_validate_session(void)
 211 {
 212         struct ltt_session *tmp;
 213
 214         session_lock_list();
 215         tmp = session_find_by_name(SESSION1);
 216
 217         ok(tmp != NULL,
 218            "Validating session: session found");
 219
 220         if (tmp) {
 221                 ok(tmp->kernel_session == NULL &&
 222                    strlen(tmp->name),
 223                    "Validating session: basic sanity check");
 224         } else {
 225                 skip(1, "Skipping session validation check as session was not found");
 226                 goto end;
 227         }
 228
 229         session_lock(tmp);
 230         session_unlock(tmp);
 231         session_put(tmp);
 232 end:
 233         session_unlock_list();
 234 }
 235
 236 static void test_destroy_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            "Destroying session: session found");
 245
 246         if (tmp) {
 247                 ok(destroy_one_session(tmp) == 0,
 248                    "Destroying session: %s destroyed",
 249                    SESSION1);
 250         } else {
 251                 skip(1, "Skipping session destruction as it was not found");
 252         }
 253         session_unlock_list();
 254 }
 255
 256 static void test_duplicate_session(void)
 257 {
 258         ok(two_session_same_name() == 0,
 259            "Duplicate session creation");
 260 }
 261
 262 static void test_session_name_generation(void)
 263 {
 264         struct ltt_session *session = NULL;
 265         enum lttng_error_code ret_code;
 266         const char *expected_session_name_prefix = DEFAULT_SESSION_NAME;
 267
 268         session_lock_list();
 269         ret_code = session_create(NULL, geteuid(), getegid(), &session);
 270         ok(ret_code == LTTNG_OK,
 271                 "Create session with a NULL name (auto-generate a name)");
 272         if (!session) {
 273                 skip(1, "Skipping session name generation tests as session_create() failed.");
 274                 goto end;
 275         }
 276         diag("Automatically-generated session name: %s", *session->name ?
 277                 session->name : "ERROR");
 278         ok(*session->name && !strncmp(expected_session_name_prefix, session->name,
 279                         sizeof(DEFAULT_SESSION_NAME) - 1),
 280                         "Auto-generated session name starts with %s",
 281                         DEFAULT_SESSION_NAME);
 282 end:
 283         session_put(session);
 284         session_unlock_list();
 285 }
 286
 287 static void test_large_session_number(void)
 288 {
 289         int ret, i, failed = 0;
 290         struct ltt_session *iter, *tmp;
 291
 292         for (i = 0; i < MAX_SESSIONS; i++) {
 293                 char *tmp_name = get_random_string();
 294                 ret = create_one_session(tmp_name);
 295                 if (ret < 0) {
 296                         diag("session %d (name: %s) creation failed", i, tmp_name);
 297                         ++failed;
 298                 }
 299         }
 300
 301         ok(failed == 0,
 302            "Large sessions number: created %u sessions",
 303            MAX_SESSIONS);
 304
 305         failed = 0;
 306
 307         session_lock_list();
 308         for (i = 0; i < MAX_SESSIONS; i++) {
 309                 cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 310                         LTTNG_ASSERT(session_get(iter));
 311                         ret = destroy_one_session(iter);
 312                         if (ret < 0) {
 313                                 diag("session %d destroy failed", i);
 314                                 ++failed;
 315                         }
 316                 }
 317         }
 318         session_unlock_list();
 319
 320         ok(failed == 0 && session_list_count() == 0,
 321            "Large sessions number: destroyed %u sessions",
 322            MAX_SESSIONS);
 323 }
 324
 325 int main(void)
 326 {
 327
 328         plan_tests(NUM_TESTS);
 329
 330         the_health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
 331
 332         diag("Sessions unit tests");
 333
 334         rcu_register_thread();
 335
 336         test_session_list();
 337
 338         test_create_one_session();
 339
 340         test_validate_session();
 341
 342         test_destroy_session();
 343
 344         test_duplicate_session();
 345
 346         empty_session_list();
 347
 348         test_session_name_generation();
 349
 350         test_large_session_number();
 351
 352         rcu_unregister_thread();
 353         lttng_thread_list_shutdown_orphans();
 354
 355         return exit_status();
 356 }