tests/kernel/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 lttng_opt_quiet;
  33
  34 int main(int argc, char **argv)
  35 {
  36         struct lttng_handle *handle = NULL;
  37         struct lttng_domain dom;
  38         struct lttng_event event;
  39         char *channel_name = "channel0";
  40         char *session_name = "kernel_all_events_basic";
  41         int ret = 0;
  42
  43         memset(&dom, 0, sizeof(dom));
  44         memset(&event, 0, sizeof(event));
  45         dom.type = LTTNG_DOMAIN_KERNEL;
  46         event.type = LTTNG_EVENT_TRACEPOINT;
  47         event.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
  48
  49         printf("\nTesting tracing all kernel events:\n");
  50         printf("-----------\n");
  51         /* Check if root */
  52         if (getuid() != 0) {
  53                 printf("Root access is needed.\nPlease run 'sudo make check' -- Aborting!\n");
  54                 return 0;
  55         }
  56
  57         if (argc < 2) {
  58                 printf("Missing session trace path\n");
  59                 return 1;
  60         }
  61
  62         printf("Creating tracing session (%s): ", argv[1]);
  63         if ((ret = lttng_create_session(session_name, argv[1])) < 0) {
  64                 printf("error creating the session : %s\n", lttng_strerror(ret));
  65                 goto create_fail;
  66         }
  67         PRINT_OK();
  68
  69         printf("Creating session handle: ");
  70         if ((handle = lttng_create_handle(session_name, &dom)) == NULL) {
  71                 printf("error creating handle: %s\n", lttng_strerror(ret));
  72                 goto handle_fail;
  73         }
  74         PRINT_OK();
  75
  76         printf("Enabling all kernel events: ");
  77         if ((ret = lttng_enable_event(handle, &event, channel_name)) < 0) {
  78                 printf("error enabling event: %s\n", lttng_strerror(ret));
  79                 goto enable_fail;
  80         }
  81         PRINT_OK();
  82
  83         printf("Start tracing: ");
  84         if ((ret = lttng_start_tracing(session_name)) < 0) {
  85                 printf("error starting tracing: %s\n", lttng_strerror(ret));
  86                 goto start_fail;
  87         }
  88         PRINT_OK();
  89
  90         sleep(2);
  91
  92         printf("Stop tracing: ");
  93         if ((ret = lttng_stop_tracing(session_name)) < 0) {
  94                 printf("error stopping tracing: %s\n", lttng_strerror(ret));
  95                 goto stop_fail;
  96         }
  97         PRINT_OK();
  98
  99         printf("Destroy tracing session: ");
 100         if ((ret = lttng_destroy_session(session_name)) < 0) {
 101                 printf("error destroying session: %s\n", lttng_strerror(ret));
 102         }
 103         PRINT_OK();
 104
 105         return 0;
 106
 107 handle_fail:
 108         assert(handle != NULL);
 109 create_fail:
 110         assert(ret != 0);
 111
 112 stop_fail:
 113 start_fail:
 114 enable_fail:
 115         lttng_destroy_session(session_name);
 116         lttng_destroy_handle(handle);
 117
 118         return 1;
 119 }