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 opt_quiet = 1;
  59 int 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 /*
 101  * Empty session list manually.
 102  */
 103 static void empty_session_list(void)
 104 {
 105         struct ltt_session *iter, *tmp;
 106
 107         cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 108                 cds_list_del(&iter->list);
 109                 session_list->count--;
 110                 free(iter);
 111         }
 112
 113         /* Session list must be 0 */
 114         assert(!session_list->count);
 115 }
 116
 117 /*
 118  * Test creation of 1 session
 119  */
 120 static int create_one_session(char *name, char *path)
 121 {
 122         int ret;
 123
 124         ret = session_create(name, path, geteuid(), getegid());
 125         if (ret == LTTCOMM_OK) {
 126                 /* Validate */
 127                 ret = find_session_name(name);
 128                 if (ret < 0) {
 129                         /* Session not found by name */
 130                         printf("session not found after creation\n");
 131                         return -1;
 132                 } else {
 133                         /* Success */
 134                         return 0;
 135                 }
 136         } else {
 137                 if (ret == LTTCOMM_EXIST_SESS) {
 138                         printf("(session already exists) ");
 139                 }
 140                 return -1;
 141         }
 142
 143         return 0;
 144 }
 145
 146 /*
 147  * Test deletion of 1 session
 148  */
 149 static int destroy_one_session(struct ltt_session *session)
 150 {
 151         int ret;
 152
 153         ret = session_destroy(session);
 154
 155         if (ret == LTTCOMM_OK) {
 156                 /* Validate */
 157                 if (session == NULL) {
 158                         return 0;
 159                 }
 160                 ret = find_session_name(session->name);
 161                 if (ret < 0) {
 162                         /* Success, -1 means that the sesion is NOT found */
 163                         return 0;
 164                 } else {
 165                         /* Fail */
 166                         return -1;
 167                 }
 168         }
 169
 170         return 0;
 171 }
 172
 173 static int fuzzing_create_args(void)
 174 {
 175         int ret;
 176
 177         ret = create_one_session(NULL, NULL);
 178         if (ret > 0) {
 179                 printf("Session created with (null),(null)\n");
 180                 return -1;
 181         }
 182
 183         ret = create_one_session(NULL, PATH1);
 184         if (ret > 0) {
 185                 printf("Session created with (null), %s)\n", PATH1);
 186                 return -1;
 187         }
 188
 189         ret = create_one_session(SESSION1, NULL);
 190         if (ret > 0) {
 191                 printf("Session created with %s, (null)\n", SESSION1);
 192                 return -1;
 193         }
 194
 195         /* Session list must be 0 */
 196         assert(!session_list->count);
 197
 198         return 0;
 199 }
 200
 201 static int fuzzing_destroy_args(void)
 202 {
 203         int ret;
 204
 205         ret = destroy_one_session(NULL);
 206         if (ret > 0) {
 207                 printf("Session destroyed with (null)\n");
 208                 return -1;
 209         }
 210
 211         /* Session list must be 0 */
 212         assert(!session_list->count);
 213
 214         return 0;
 215 }
 216
 217 /*
 218  * This test is supposed to fail at the second create call. If so, return 0 for
 219  * test success, else -1.
 220  */
 221 static int two_session_same_name(void)
 222 {
 223         int ret;
 224
 225         ret = create_one_session(SESSION1, PATH1);
 226         if (ret < 0) {
 227                 /* Fail */
 228                 return -1;
 229         }
 230
 231         ret = create_one_session(SESSION1, PATH1);
 232         if (ret < 0) {
 233                 /* Success */
 234                 return 0;
 235         }
 236
 237         /* Fail */
 238         return -1;
 239 }
 240
 241 int main(int argc, char **argv)
 242 {
 243         int ret, i;
 244         struct ltt_session *iter, *tmp;
 245
 246         srand(time(NULL));
 247
 248         printf("\nTesting Sessions:\n-----------\n");
 249
 250         session_list = session_get_list();
 251         if (session_list == NULL) {
 252                 return -1;
 253         }
 254
 255         printf("Create 1 session %s: ", SESSION1);
 256         fflush(stdout);
 257         ret = create_one_session(SESSION1, PATH1);
 258         if (ret < 0) {
 259                 return -1;
 260         }
 261         PRINT_OK();
 262
 263         printf("Validating created session %s: ", SESSION1);
 264         fflush(stdout);
 265         tmp = session_find_by_name(SESSION1);
 266         if (tmp == NULL) {
 267                 return -1;
 268         }
 269         /* Basic init session values */
 270         assert(tmp->kernel_session == NULL);
 271         assert(strlen(tmp->path));
 272         assert(strlen(tmp->name));
 273         session_lock(tmp);
 274         session_unlock(tmp);
 275
 276         PRINT_OK();
 277
 278         printf("Destroy 1 session %s: ", SESSION1);
 279         fflush(stdout);
 280         ret = destroy_one_session(tmp);
 281         if (ret < 0) {
 282                 return -1;
 283         }
 284         PRINT_OK();
 285
 286         printf("Two session with same name: ");
 287         fflush(stdout);
 288         ret = two_session_same_name();
 289         if (ret < 0) {
 290                 return -1;
 291         }
 292         PRINT_OK();
 293
 294         empty_session_list();
 295
 296         printf("Fuzzing create_session arguments: ");
 297         fflush(stdout);
 298         ret = fuzzing_create_args();
 299         if (ret < 0) {
 300                 return -1;
 301         }
 302         PRINT_OK();
 303
 304         printf("Fuzzing destroy_session argument: ");
 305         fflush(stdout);
 306         ret = fuzzing_destroy_args();
 307         if (ret < 0) {
 308                 return -1;
 309         }
 310         PRINT_OK();
 311
 312         printf("Creating %d sessions: ", MAX_SESSIONS);
 313         fflush(stdout);
 314         for (i = 0; i < MAX_SESSIONS; i++) {
 315                 char *tmp_name = get_random_string();
 316
 317                 ret = create_one_session(tmp_name, PATH1);
 318                 if (ret < 0) {
 319                         printf("session %d (name: %s) creation failed\n", i, tmp_name);
 320                         return -1;
 321                 }
 322         }
 323         PRINT_OK();
 324
 325         printf("Destroying %d sessions: ", MAX_SESSIONS);
 326         fflush(stdout);
 327         for (i = 0; i < MAX_SESSIONS; i++) {
 328                 cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
 329                         ret = destroy_one_session(iter);
 330                         if (ret < 0) {
 331                                 printf("session %d (name: %s) creation failed\n", i, iter->name);
 332                                 return -1;
 333                         }
 334                 }
 335         }
 336         PRINT_OK();
 337
 338         /* Session list must be 0 */
 339         assert(!session_list->count);
 340
 341         /* Success */
 342         return 0;
 343 }