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 int ust_consumerd32_fd;
  46 int ust_consumerd64_fd;
  47
  48 static const char alphanum[] =
  49         "0123456789"
  50         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  51         "abcdefghijklmnopqrstuvwxyz";
  52
  53 static struct ltt_kernel_session *kern;
  54 static char random_string[RANDOM_STRING_LEN];
  55
  56 /*
  57  * Return random string of 10 characters.
  58  * Not thread-safe.
  59  */
  60 static char *get_random_string(void)
  61 {
  62         int i;
  63
  64         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  65                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  66         }
  67
  68         random_string[RANDOM_STRING_LEN - 1] = '\0';
  69
  70         return random_string;
  71 }
  72
  73 static void test_create_one_kernel_session(void)
  74 {
  75         kern = trace_kernel_create_session(PATH1);
  76         ok(kern != NULL, "Create kernel session");
  77
  78         ok(kern->fd == -1 &&
  79            kern->metadata_stream_fd == -1 &&
  80            kern->consumer_fds_sent == 0 &&
  81            kern->channel_count == 0 &&
  82            kern->stream_count_global == 0 &&
  83            kern->metadata == NULL,
  84            "Validate kernel session");
  85
  86         /* Init list in order to avoid sefaults from cds_list_del */
  87         trace_kernel_destroy_session(kern);
  88 }
  89
  90 static void test_create_kernel_metadata(void)
  91 {
  92         assert(kern != NULL);
  93
  94         kern->metadata = trace_kernel_create_metadata();
  95         ok(kern->metadata != NULL, "Create kernel metadata");
  96
  97         ok(kern->metadata->fd == -1 &&
  98            kern->metadata->conf != NULL &&
  99            kern->metadata->conf->attr.overwrite
 100                         == DEFAULT_CHANNEL_OVERWRITE &&
 101            kern->metadata->conf->attr.subbuf_size
 102                         == default_get_metadata_subbuf_size() &&
 103            kern->metadata->conf->attr.num_subbuf
 104                         == DEFAULT_METADATA_SUBBUF_NUM &&
 105            kern->metadata->conf->attr.switch_timer_interval
 106                         == DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER &&
 107            kern->metadata->conf->attr.read_timer_interval
 108                         == DEFAULT_KERNEL_CHANNEL_READ_TIMER &&
 109            kern->metadata->conf->attr.output
 110                == DEFAULT_KERNEL_CHANNEL_OUTPUT,
 111            "Validate kernel session metadata");
 112
 113         trace_kernel_destroy_metadata(kern->metadata);
 114 }
 115
 116 static void test_create_kernel_channel(void)
 117 {
 118         struct ltt_kernel_channel *chan;
 119         struct lttng_channel attr;
 120
 121         memset(&attr, 0, sizeof(attr));
 122
 123         chan = trace_kernel_create_channel(&attr);
 124         ok(chan != NULL, "Create kernel channel");
 125
 126         ok(chan->fd == -1 &&
 127            chan->enabled == 1 &&
 128            chan->stream_count == 0 &&
 129            chan->ctx == NULL &&
 130            chan->channel->attr.overwrite  == attr.attr.overwrite,
 131            "Validate kernel channel");
 132
 133         /* Init list in order to avoid sefaults from cds_list_del */
 134         CDS_INIT_LIST_HEAD(&chan->list);
 135         trace_kernel_destroy_channel(chan);
 136 }
 137
 138 static void test_create_kernel_event(void)
 139 {
 140         struct ltt_kernel_event *event;
 141         struct lttng_event ev;
 142
 143         memset(&ev, 0, sizeof(ev));
 144         strncpy(ev.name, get_random_string(), LTTNG_KERNEL_SYM_NAME_LEN);
 145         ev.type = LTTNG_EVENT_TRACEPOINT;
 146         ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
 147
 148         event = trace_kernel_create_event(&ev);
 149         ok(event != NULL, "Create kernel event");
 150
 151         ok(event->fd == -1 &&
 152            event->enabled == 1 &&
 153            event->event->instrumentation == LTTNG_KERNEL_TRACEPOINT &&
 154            strlen(event->event->name),
 155            "Validate kernel event");
 156
 157         /* Init list in order to avoid sefaults from cds_list_del */
 158         CDS_INIT_LIST_HEAD(&event->list);
 159         trace_kernel_destroy_event(event);
 160 }
 161
 162 static void test_create_kernel_stream(void)
 163 {
 164         struct ltt_kernel_stream *stream;
 165
 166         stream = trace_kernel_create_stream("stream1", 0);
 167         ok(stream != NULL, "Create kernel stream");
 168
 169         ok(stream->fd == -1 &&
 170            stream->state == 0,
 171            "Validate kernel stream");
 172
 173         /* Init list in order to avoid sefaults from cds_list_del */
 174         CDS_INIT_LIST_HEAD(&stream->list);
 175         trace_kernel_destroy_stream(stream);
 176 }
 177
 178 int main(int argc, char **argv)
 179 {
 180         plan_tests(NUM_TESTS);
 181
 182         diag("Kernel data structure unit test");
 183
 184         test_create_one_kernel_session();
 185         test_create_kernel_metadata();
 186         test_create_kernel_channel();
 187         test_create_kernel_event();
 188         test_create_kernel_stream();
 189
 190         /* Success */
 191         return 0;
 192 }