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