tests/unit/test_kernel_data.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 <tap/tap.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 /* Number of TAP tests in this file */
  39 #define NUM_TESTS 10
  40
  41 /* For lttngerr.h */
  42 int lttng_opt_quiet = 1;
  43 int lttng_opt_verbose;
  44
  45 static const char alphanum[] =
  46         "0123456789"
  47         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  48         "abcdefghijklmnopqrstuvwxyz";
  49
  50 static struct ltt_kernel_session *kern;
  51 static char random_string[RANDOM_STRING_LEN];
  52
  53 /*
  54  * Return random string of 10 characters.
  55  * Not thread-safe.
  56  */
  57 static char *get_random_string(void)
  58 {
  59         int i;
  60
  61         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  62                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  63         }
  64
  65         random_string[RANDOM_STRING_LEN - 1] = '\0';
  66
  67         return random_string;
  68 }
  69
  70 static void test_create_one_kernel_session(void)
  71 {
  72         kern = trace_kernel_create_session(PATH1);
  73         ok(kern != NULL, "Create kernel session");
  74
  75         ok(kern->fd == -1 &&
  76            kern->metadata_stream_fd == -1 &&
  77            kern->consumer_fds_sent == 0 &&
  78            kern->channel_count == 0 &&
  79            kern->stream_count_global == 0 &&
  80            kern->metadata == NULL,
  81            "Validate kernel session");
  82
  83         /* Init list in order to avoid sefaults from cds_list_del */
  84         trace_kernel_destroy_session(kern);
  85 }
  86
  87 static void test_create_kernel_metadata(void)
  88 {
  89         assert(kern != NULL);
  90
  91         kern->metadata = trace_kernel_create_metadata();
  92         ok(kern->metadata != NULL, "Create kernel metadata");
  93
  94         ok(kern->metadata->fd == -1 &&
  95            kern->metadata->conf != NULL &&
  96            kern->metadata->conf->attr.overwrite
  97                         == DEFAULT_CHANNEL_OVERWRITE &&
  98            kern->metadata->conf->attr.subbuf_size
  99                         == default_get_metadata_subbuf_size() &&
 100            kern->metadata->conf->attr.num_subbuf
 101                         == DEFAULT_METADATA_SUBBUF_NUM &&
 102            kern->metadata->conf->attr.switch_timer_interval
 103                         == DEFAULT_CHANNEL_SWITCH_TIMER &&
 104            kern->metadata->conf->attr.read_timer_interval
 105                         == DEFAULT_CHANNEL_READ_TIMER &&
 106            kern->metadata->conf->attr.output
 107                == DEFAULT_KERNEL_CHANNEL_OUTPUT,
 108            "Validate kernel session metadata");
 109
 110         trace_kernel_destroy_metadata(kern->metadata);
 111 }
 112
 113 static void test_create_kernel_channel(void)
 114 {
 115         struct ltt_kernel_channel *chan;
 116         struct lttng_channel attr;
 117
 118         memset(&attr, 0, sizeof(attr));
 119
 120         chan = trace_kernel_create_channel(&attr);
 121         ok(chan != NULL, "Create kernel channel");
 122
 123         ok(chan->fd == -1 &&
 124            chan->enabled == 1 &&
 125            chan->stream_count == 0 &&
 126            chan->ctx == NULL &&
 127            chan->channel->attr.overwrite  == attr.attr.overwrite,
 128            "Validate kernel channel");
 129
 130         /* Init list in order to avoid sefaults from cds_list_del */
 131         CDS_INIT_LIST_HEAD(&chan->list);
 132         trace_kernel_destroy_channel(chan);
 133 }
 134
 135 static void test_create_kernel_event(void)
 136 {
 137         struct ltt_kernel_event *event;
 138         struct lttng_event ev;
 139
 140         memset(&ev, 0, sizeof(ev));
 141         strncpy(ev.name, get_random_string(), LTTNG_KERNEL_SYM_NAME_LEN);
 142         ev.type = LTTNG_EVENT_TRACEPOINT;
 143         ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
 144
 145         event = trace_kernel_create_event(&ev);
 146         ok(event != NULL, "Create kernel event");
 147
 148         ok(event->fd == -1 &&
 149            event->enabled == 1 &&
 150            event->event->instrumentation == LTTNG_KERNEL_TRACEPOINT &&
 151            strlen(event->event->name),
 152            "Validate kernel event");
 153
 154         /* Init list in order to avoid sefaults from cds_list_del */
 155         CDS_INIT_LIST_HEAD(&event->list);
 156         trace_kernel_destroy_event(event);
 157 }
 158
 159 static void test_create_kernel_stream(void)
 160 {
 161         struct ltt_kernel_stream *stream;
 162
 163         stream = trace_kernel_create_stream("stream1", 0);
 164         ok(stream != NULL, "Create kernel stream");
 165
 166         ok(stream->fd == -1 &&
 167            stream->state == 0,
 168            "Validate kernel stream");
 169
 170         /* Init list in order to avoid sefaults from cds_list_del */
 171         CDS_INIT_LIST_HEAD(&stream->list);
 172         trace_kernel_destroy_stream(stream);
 173 }
 174
 175 int main(int argc, char **argv)
 176 {
 177         diag("Kernel data structure unit test");
 178
 179         plan_tests(NUM_TESTS);
 180
 181         test_create_one_kernel_session();
 182         test_create_kernel_metadata();
 183         test_create_kernel_channel();
 184         test_create_kernel_event();
 185         test_create_kernel_stream();
 186
 187         /* Success */
 188         return 0;
 189 }