tests/tools/test_kernel_data_trace.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 <bin/lttng-sessiond/trace-kernel.h>
  29 #include <common/defaults.h>
  30
  31 #include "utils.h"
  32
  33 /* This path will NEVER be created in this test */
  34 #define PATH1 "/tmp/.test-junk-lttng"
  35
  36 #define RANDOM_STRING_LEN       11
  37
  38 /* For lttngerr.h */
  39 int lttng_opt_quiet = 1;
  40 int lttng_opt_verbose;
  41
  42 static const char alphanum[] =
  43         "0123456789"
  44         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  45         "abcdefghijklmnopqrstuvwxyz";
  46
  47 static struct ltt_kernel_session *kern;
  48 static char random_string[RANDOM_STRING_LEN];
  49
  50 /*
  51  * Return random string of 10 characters.
  52  * Not thread-safe.
  53  */
  54 static char *get_random_string(void)
  55 {
  56         int i;
  57
  58         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  59                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  60         }
  61
  62         random_string[RANDOM_STRING_LEN - 1] = '\0';
  63
  64         return random_string;
  65 }
  66
  67 static void create_one_kernel_session(void)
  68 {
  69         printf("Create kernel session: ");
  70         kern = trace_kernel_create_session(PATH1);
  71         assert(kern != NULL);
  72         PRINT_OK();
  73
  74         printf("Validating kernel session: ");
  75         assert(kern->fd == -1);
  76         assert(kern->metadata_stream_fd == -1);
  77         assert(kern->consumer_fds_sent == 0);
  78         assert(kern->channel_count == 0);
  79         assert(kern->stream_count_global == 0);
  80         assert(kern->metadata == NULL);
  81         assert(kern->consumer_fd == -1);
  82         PRINT_OK();
  83
  84         /* Init list in order to avoid sefaults from cds_list_del */
  85         trace_kernel_destroy_session(kern);
  86 }
  87
  88 static void create_kernel_metadata(void)
  89 {
  90         assert(kern != NULL);
  91
  92         printf("Create kernel metadata: ");
  93         kern->metadata = trace_kernel_create_metadata(PATH1);
  94         assert(kern->metadata != NULL);
  95         PRINT_OK();
  96
  97         printf("Validating kernel session metadata: ");
  98         assert(kern->metadata->fd == -1);
  99         assert(kern->metadata->conf != NULL);
 100         assert(kern->metadata->conf->attr.overwrite
 101                         == DEFAULT_CHANNEL_OVERWRITE);
 102         assert(kern->metadata->conf->attr.subbuf_size
 103                         == DEFAULT_METADATA_SUBBUF_SIZE);
 104         assert(kern->metadata->conf->attr.num_subbuf
 105                         == DEFAULT_METADATA_SUBBUF_NUM);
 106         assert(kern->metadata->conf->attr.switch_timer_interval
 107                         == DEFAULT_CHANNEL_SWITCH_TIMER);
 108         assert(kern->metadata->conf->attr.read_timer_interval
 109                         == DEFAULT_CHANNEL_READ_TIMER);
 110         assert(kern->metadata->conf->attr.output
 111                         == DEFAULT_KERNEL_CHANNEL_OUTPUT);
 112         PRINT_OK();
 113
 114         trace_kernel_destroy_metadata(kern->metadata);
 115 }
 116
 117 static void create_kernel_channel(void)
 118 {
 119         struct ltt_kernel_channel *chan;
 120         struct lttng_channel attr;
 121
 122         memset(&attr, 0, sizeof(attr));
 123
 124         printf("Creating kernel channel: ");
 125         chan = trace_kernel_create_channel(&attr, PATH1);
 126         assert(chan != NULL);
 127         PRINT_OK();
 128
 129         printf("Validating kernel channel: ");
 130         assert(chan->fd == -1);
 131         assert(chan->enabled == 1);
 132         assert(chan->stream_count == 0);
 133         assert(chan->ctx == NULL);
 134         assert(chan->channel->attr.overwrite  == attr.attr.overwrite);
 135         PRINT_OK();
 136
 137         /* Init list in order to avoid sefaults from cds_list_del */
 138         CDS_INIT_LIST_HEAD(&chan->list);
 139         trace_kernel_destroy_channel(chan);
 140 }
 141
 142 static void create_kernel_event(void)
 143 {
 144         struct ltt_kernel_event *event;
 145         struct lttng_event ev;
 146
 147         memset(&ev, 0, sizeof(ev));
 148         strncpy(ev.name, get_random_string(), LTTNG_KERNEL_SYM_NAME_LEN);
 149         ev.type = LTTNG_EVENT_TRACEPOINT;
 150         ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
 151
 152         printf("Creating kernel event: ");
 153         event = trace_kernel_create_event(&ev);
 154         assert(event != NULL);
 155         PRINT_OK();
 156
 157         printf("Validating kernel event: ");
 158         assert(event->fd == -1);
 159         assert(event->enabled == 1);
 160         assert(event->ctx == NULL);
 161         assert(event->event->instrumentation == LTTNG_KERNEL_TRACEPOINT);
 162         assert(strlen(event->event->name));
 163         PRINT_OK();
 164
 165         /* Init list in order to avoid sefaults from cds_list_del */
 166         CDS_INIT_LIST_HEAD(&event->list);
 167         trace_kernel_destroy_event(event);
 168 }
 169
 170 static void create_kernel_stream(void)
 171 {
 172         struct ltt_kernel_stream *stream;
 173
 174         printf("Creating kernel stream: ");
 175         stream = trace_kernel_create_stream("stream1", 0);
 176         assert(stream != NULL);
 177         PRINT_OK();
 178
 179         printf("Validating kernel stream: ");
 180         assert(stream->fd == -1);
 181         assert(stream->state == 0);
 182         PRINT_OK();
 183
 184         /* Init list in order to avoid sefaults from cds_list_del */
 185         CDS_INIT_LIST_HEAD(&stream->list);
 186         trace_kernel_destroy_stream(stream);
 187 }
 188
 189 int main(int argc, char **argv)
 190 {
 191         printf("\nTesting kernel data structures:\n-----------\n");
 192
 193         create_one_kernel_session();
 194
 195         create_kernel_metadata();
 196         create_kernel_channel();
 197
 198
 199         create_kernel_event();
 200
 201         create_kernel_stream();
 202
 203         /* Success */
 204         return 0;
 205 }