tests/lttng/kernel_all_events_basic.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
  28 #include <lttng/lttng.h>
  29
  30 #include "../utils.h"
  31
  32 int main(int argc, char **argv)
  33 {
  34     struct lttng_handle *handle = NULL;
  35     struct lttng_domain dom;
  36     char *channel_name = "mychan";
  37     int ret = 0;
  38
  39     dom.type = LTTNG_DOMAIN_KERNEL;
  40
  41         printf("\nTesting tracing all kernel events:\n");
  42         printf("-----------\n");
  43         /* Check if root */
  44         if (getuid() != 0) {
  45                 printf("Root access is needed.\nPlease run 'sudo make check' -- Aborting!\n");
  46                 return 0;
  47         }
  48
  49         if (argc < 2) {
  50                 printf("Missing session trace path\n");
  51                 return 1;
  52         }
  53
  54         printf("Creating tracing session (%s): ", argv[1]);
  55     if ((ret = lttng_create_session("test", argv[1])) < 0) {
  56         printf("error creating the session : %s\n", lttng_get_readable_code(ret));
  57                 goto create_fail;
  58     }
  59         PRINT_OK();
  60
  61         printf("Creating session handle: ");
  62         if ((handle = lttng_create_handle("test", &dom)) == NULL) {
  63                 printf("error creating handle: %s\n", lttng_get_readable_code(ret));
  64                 goto handle_fail;
  65         }
  66         PRINT_OK();
  67
  68         printf("Enabling all kernel events: ");
  69     if ((ret = lttng_enable_event(handle, NULL, channel_name)) < 0) {
  70         printf("error enabling event: %s\n", lttng_get_readable_code(ret));
  71                 goto enable_fail;
  72     }
  73         PRINT_OK();
  74
  75         printf("Start tracing: ");
  76     if ((ret = lttng_start_tracing(handle)) < 0) {
  77         printf("error starting tracing: %s\n", lttng_get_readable_code(ret));
  78                 goto start_fail;
  79     }
  80         PRINT_OK();
  81
  82     sleep(2);
  83
  84         printf("Stop tracing: ");
  85         if ((ret = lttng_stop_tracing(handle)) < 0) {
  86                 printf("error stopping tracing: %s\n", lttng_get_readable_code(ret));
  87                 goto stop_fail;
  88         }
  89         PRINT_OK();
  90
  91         printf("Destroy tracing session: ");
  92         if ((ret = lttng_destroy_session(handle)) < 0) {
  93                 printf("error destroying session: %s\n", lttng_get_readable_code(ret));
  94         }
  95         PRINT_OK();
  96
  97         return 0;
  98
  99 create_fail:
 100         assert(ret != 0);
 101 handle_fail:
 102         assert(handle != NULL);
 103
 104 stop_fail:
 105 start_fail:
 106 enable_fail:
 107         lttng_destroy_session(handle);
 108         lttng_destroy_handle(handle);
 109
 110     return 1;
 111 }