tests/test_sessions.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 <bin/lttng-sessiond/session.h>
  30 #include <common/sessiond-comm/sessiond-comm.h>
  31
  32 #include "utils.h"
  33
  34 #define SESSION1 "test1"
  35
  36 /* This path will NEVER be created in this test */
  37 #define PATH1 "/tmp/.test-junk-lttng"
  38
  39 #define MAX_SESSIONS 10000
  40 #define RANDOM_STRING_LEN       11
  41
  42 /*
  43  * String of 263 caracters. NAME_MAX + "OVERFLOW". If OVERFLOW appears in the
  44  * session name, we have a problem.
  45  *
  46  * NAME_MAX = 255
  47  */
  48 #define OVERFLOW_SESSION_NAME \
  49         "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd" \
  50         "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd" \
  51         "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd" \
  52         "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabc"  \
  53         "OVERFLOW"
  54
  55 static struct ltt_session_list *session_list;
  56
  57 /* For lttngerr.h */
  58 int lttng_opt_quiet = 1;
  59 int lttng_opt_verbose = 0;
  60
  61 static const char alphanum[] =
  62         "0123456789"
  63         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  64         "abcdefghijklmnopqrstuvwxyz";
  65 static char random_string[RANDOM_STRING_LEN];
  66
  67 /*
  68  * Return random string of 10 characters.
  69  * Not thread-safe.
  70  */
  71 static char *get_random_string(void)
  72 {
  73         int i;
  74
  75         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  76                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  77         }
  78
  79         random_string[RANDOM_STRING_LEN - 1] = '\0';
  80
  81         return random_string;
  82 }
  83
  84 /*
  85  * Return 0 if session name is found, else -1
  86  */
  87 static int find_session_name(char *name)
  88 {
  89         struct ltt_session *iter;
  90
  91         cds_list_for_each_entry(iter, &session_list->head, list) {
  92                 if (strcmp(iter->name, name) == 0) {
  93                         return 0;
  94                 }
  95         }
  96
  97         return -1;
  98 }
  99
 100 static int session_list_count(void)
 101 {
 102         int count = 0;
 103         struct ltt_session *iter;
 104
 105         cds_list_for_each_entry(iter, &session_list->head, list) {
 106                 count++;
 107         }
 108         return count;
 109 }
 110
 111 /*
 112  * Empty session list manually.
 113  */
 114 static void empty_session_list(void)
 115 {
 116         struct ltt_session *iter, *tmp;
 117
 118         cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 119                 cds_list_del(&iter->list);
 120                 free(iter);
 121         }
 122
 123         /* Session list must be 0 */
 124         assert(!session_list_count());
 125 }
 126
 127 /*
 128  * Test creation of 1 session
 129  */
 130 static int create_one_session(char *name, char *path)
 131 {
 132         int ret;
 133
 134         ret = session_create(name, path, geteuid(), getegid());
 135         if (ret == LTTCOMM_OK) {
 136                 /* Validate */
 137                 ret = find_session_name(name);
 138                 if (ret < 0) {
 139                         /* Session not found by name */
 140                         printf("session not found after creation\n");
 141                         return -1;
 142                 } else {
 143                         /* Success */
 144                         return 0;
 145                 }
 146         } else {
 147                 if (ret == LTTCOMM_EXIST_SESS) {
 148                         printf("(session already exists) ");
 149                 }
 150                 return -1;
 151         }
 152
 153         return 0;
 154 }
 155
 156 /*
 157  * Test deletion of 1 session
 158  */
 159 static int destroy_one_session(struct ltt_session *session)
 160 {
 161         int ret;
 162
 163         ret = session_destroy(session);
 164
 165         if (ret == LTTCOMM_OK) {
 166                 /* Validate */
 167                 if (session == NULL) {
 168                         return 0;
 169                 }
 170                 ret = find_session_name(session->name);
 171                 if (ret < 0) {
 172                         /* Success, -1 means that the sesion is NOT found */
 173                         return 0;
 174                 } else {
 175                         /* Fail */
 176                         return -1;
 177                 }
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int fuzzing_create_args(void)
 184 {
 185         int ret;
 186
 187         ret = create_one_session(NULL, NULL);
 188         if (ret > 0) {
 189                 printf("Session created with (null),(null)\n");
 190                 return -1;
 191         }
 192
 193         ret = create_one_session(NULL, PATH1);
 194         if (ret > 0) {
 195                 printf("Session created with (null), %s)\n", PATH1);
 196                 return -1;
 197         }
 198
 199         ret = create_one_session(SESSION1, NULL);
 200         if (ret > 0) {
 201                 printf("Session created with %s, (null)\n", SESSION1);
 202                 return -1;
 203         }
 204
 205         /* Session list must be 0 */
 206         assert(!session_list_count());
 207
 208         return 0;
 209 }
 210
 211 static int fuzzing_destroy_args(void)
 212 {
 213         int ret;
 214
 215         ret = destroy_one_session(NULL);
 216         if (ret > 0) {
 217                 printf("Session destroyed with (null)\n");
 218                 return -1;
 219         }
 220
 221         /* Session list must be 0 */
 222         assert(!session_list_count());
 223
 224         return 0;
 225 }
 226
 227 /*
 228  * This test is supposed to fail at the second create call. If so, return 0 for
 229  * test success, else -1.
 230  */
 231 static int two_session_same_name(void)
 232 {
 233         int ret;
 234
 235         ret = create_one_session(SESSION1, PATH1);
 236         if (ret < 0) {
 237                 /* Fail */
 238                 return -1;
 239         }
 240
 241         ret = create_one_session(SESSION1, PATH1);
 242         if (ret < 0) {
 243                 /* Success */
 244                 return 0;
 245         }
 246
 247         /* Fail */
 248         return -1;
 249 }
 250
 251 int main(int argc, char **argv)
 252 {
 253         int ret, i;
 254         struct ltt_session *iter, *tmp;
 255
 256         srand(time(NULL));
 257
 258         printf("\nTesting Sessions:\n-----------\n");
 259
 260         session_list = session_get_list();
 261         if (session_list == NULL) {
 262                 return -1;
 263         }
 264
 265         printf("Create 1 session %s: ", SESSION1);
 266         fflush(stdout);
 267         ret = create_one_session(SESSION1, PATH1);
 268         if (ret < 0) {
 269                 return -1;
 270         }
 271         PRINT_OK();
 272
 273         printf("Validating created session %s: ", SESSION1);
 274         fflush(stdout);
 275         tmp = session_find_by_name(SESSION1);
 276         if (tmp == NULL) {
 277                 return -1;
 278         }
 279         /* Basic init session values */
 280         assert(tmp->kernel_session == NULL);
 281         assert(strlen(tmp->path));
 282         assert(strlen(tmp->name));
 283         session_lock(tmp);
 284         session_unlock(tmp);
 285
 286         PRINT_OK();
 287
 288         printf("Destroy 1 session %s: ", SESSION1);
 289         fflush(stdout);
 290         ret = destroy_one_session(tmp);
 291         if (ret < 0) {
 292                 return -1;
 293         }
 294         PRINT_OK();
 295
 296         printf("Two session with same name: ");
 297         fflush(stdout);
 298         ret = two_session_same_name();
 299         if (ret < 0) {
 300                 return -1;
 301         }
 302         PRINT_OK();
 303
 304         empty_session_list();
 305
 306         printf("Fuzzing create_session arguments: ");
 307         fflush(stdout);
 308         ret = fuzzing_create_args();
 309         if (ret < 0) {
 310                 return -1;
 311         }
 312         PRINT_OK();
 313
 314         printf("Fuzzing destroy_session argument: ");
 315         fflush(stdout);
 316         ret = fuzzing_destroy_args();
 317         if (ret < 0) {
 318                 return -1;
 319         }
 320         PRINT_OK();
 321
 322         printf("Creating %d sessions: ", MAX_SESSIONS);
 323         fflush(stdout);
 324         for (i = 0; i < MAX_SESSIONS; i++) {
 325                 char *tmp_name = get_random_string();
 326
 327                 ret = create_one_session(tmp_name, PATH1);
 328                 if (ret < 0) {
 329                         printf("session %d (name: %s) creation failed\n", i, tmp_name);
 330                         return -1;
 331                 }
 332
 333                 if ((i % 1000) == 0) {
 334                         fprintf(stdout, "%d..", i);
 335                         fflush(stdout);
 336                 }
 337         }
 338         PRINT_OK();
 339
 340         printf("Destroying %d sessions: ", MAX_SESSIONS);
 341         fflush(stdout);
 342         for (i = 0; i < MAX_SESSIONS; i++) {
 343                 cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 344                         ret = destroy_one_session(iter);
 345                         if (ret < 0) {
 346                                 printf("session %d (name: %s) creation failed\n", i, iter->name);
 347                                 return -1;
 348                         }
 349                 }
 350         }
 351         PRINT_OK();
 352
 353         /* Session list must be 0 */
 354         assert(!session_list_count());
 355
 356         /* Success */
 357         return 0;
 358 }