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         struct lttng_event event;
  37     char *channel_name = "channel0";
  38         char *session_name = "kernel_all_events_basic";
  39     int ret = 0;
  40
  41     dom.type = LTTNG_DOMAIN_KERNEL;
  42
  43         memset(&event, 0, sizeof(struct lttng_event));
  44         event.type = LTTNG_EVENT_TRACEPOINT;
  45
  46         printf("\nTesting tracing all kernel events:\n");
  47         printf("-----------\n");
  48         /* Check if root */
  49         if (getuid() != 0) {
  50                 printf("Root access is needed.\nPlease run 'sudo make check' -- Aborting!\n");
  51                 return 0;
  52         }
  53
  54         if (argc < 2) {
  55                 printf("Missing session trace path\n");
  56                 return 1;
  57         }
  58
  59         printf("Creating tracing session (%s): ", argv[1]);
  60     if ((ret = lttng_create_session(session_name, argv[1])) < 0) {
  61         printf("error creating the session : %s\n", lttng_strerror(ret));
  62                 goto create_fail;
  63     }
  64         PRINT_OK();
  65
  66         printf("Creating session handle: ");
  67         if ((handle = lttng_create_handle(session_name, &dom)) == NULL) {
  68                 printf("error creating handle: %s\n", lttng_strerror(ret));
  69                 goto handle_fail;
  70         }
  71         PRINT_OK();
  72
  73         printf("Enabling all kernel events: ");
  74     if ((ret = lttng_enable_event(handle, &event, channel_name)) < 0) {
  75         printf("error enabling event: %s\n", lttng_strerror(ret));
  76                 goto enable_fail;
  77     }
  78         PRINT_OK();
  79
  80         printf("Start tracing: ");
  81     if ((ret = lttng_start_tracing(session_name)) < 0) {
  82         printf("error starting tracing: %s\n", lttng_strerror(ret));
  83                 goto start_fail;
  84     }
  85         PRINT_OK();
  86
  87     sleep(2);
  88
  89         printf("Stop tracing: ");
  90         if ((ret = lttng_stop_tracing(session_name)) < 0) {
  91                 printf("error stopping tracing: %s\n", lttng_strerror(ret));
  92                 goto stop_fail;
  93         }
  94         PRINT_OK();
  95
  96         printf("Destroy tracing session: ");
  97         if ((ret = lttng_destroy_session(session_name)) < 0) {
  98                 printf("error destroying session: %s\n", lttng_strerror(ret));
  99         }
 100         PRINT_OK();
 101
 102         return 0;
 103
 104 create_fail:
 105         assert(ret != 0);
 106 handle_fail:
 107         assert(handle != NULL);
 108
 109 stop_fail:
 110 start_fail:
 111 enable_fail:
 112         lttng_destroy_session(session_name);
 113         lttng_destroy_handle(handle);
 114
 115     return 1;
 116 }