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 #include <assert.h>
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <time.h>
  26
  27 #include <bin/lttng-sessiond/trace-kernel.h>
  28 #include <common/defaults.h>
  29
  30 #include <tap/tap.h>
  31
  32 #define RANDOM_STRING_LEN       11
  33
  34 /* Number of TAP tests in this file */
  35 #define NUM_TESTS 11
  36
  37 /* For error.h */
  38 int lttng_opt_quiet = 1;
  39 int lttng_opt_verbose;
  40 int lttng_opt_mi;
  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 test_create_one_kernel_session(void)
  68 {
  69         kern = trace_kernel_create_session();
  70         ok(kern != NULL, "Create kernel session");
  71
  72         if (!kern) {
  73                 skip(1, "Kernel session is null");
  74                 return;
  75         }
  76         ok(kern->fd == -1 &&
  77            kern->metadata_stream_fd == -1 &&
  78            kern->consumer_fds_sent == 0 &&
  79            kern->channel_count == 0 &&
  80            kern->stream_count_global == 0 &&
  81            kern->metadata == NULL,
  82            "Validate kernel session");
  83 }
  84
  85 static void test_create_kernel_metadata(void)
  86 {
  87         assert(kern != NULL);
  88
  89         kern->metadata = trace_kernel_create_metadata();
  90         ok(kern->metadata != NULL, "Create kernel metadata");
  91
  92         ok(kern->metadata->fd == -1 &&
  93            kern->metadata->conf != NULL &&
  94            kern->metadata->conf->attr.overwrite
  95                         == DEFAULT_CHANNEL_OVERWRITE &&
  96            kern->metadata->conf->attr.subbuf_size
  97                         == default_get_metadata_subbuf_size() &&
  98            kern->metadata->conf->attr.num_subbuf
  99                         == DEFAULT_METADATA_SUBBUF_NUM &&
 100            kern->metadata->conf->attr.switch_timer_interval
 101                         == DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER &&
 102            kern->metadata->conf->attr.read_timer_interval
 103                         == DEFAULT_KERNEL_CHANNEL_READ_TIMER &&
 104            kern->metadata->conf->attr.output
 105                == DEFAULT_KERNEL_CHANNEL_OUTPUT,
 106            "Validate kernel session metadata");
 107
 108         trace_kernel_destroy_metadata(kern->metadata);
 109 }
 110
 111 static void test_create_kernel_channel(void)
 112 {
 113         struct ltt_kernel_channel *chan;
 114         struct lttng_channel attr;
 115         struct lttng_channel_extended extended;
 116
 117         memset(&attr, 0, sizeof(attr));
 118         memset(&extended, 0, sizeof(extended));
 119         attr.attr.extended.ptr = &extended;
 120
 121         chan = trace_kernel_create_channel(&attr);
 122         ok(chan != NULL, "Create kernel channel");
 123
 124         if (!chan) {
 125                 skip(1, "Channel is null");
 126                 return;
 127         }
 128
 129         ok(chan->fd == -1 &&
 130            chan->enabled == 1 &&
 131            chan->stream_count == 0 &&
 132            chan->channel->attr.overwrite  == attr.attr.overwrite,
 133            "Validate kernel channel");
 134
 135         /* Init list in order to avoid sefaults from cds_list_del */
 136         CDS_INIT_LIST_HEAD(&chan->list);
 137         trace_kernel_destroy_channel(chan);
 138 }
 139
 140 static void test_create_kernel_event(void)
 141 {
 142         enum lttng_error_code ret;
 143         struct ltt_kernel_event *event;
 144         struct lttng_event ev;
 145
 146         memset(&ev, 0, sizeof(ev));
 147         ok(!lttng_strncpy(ev.name, get_random_string(),
 148                         LTTNG_KERNEL_SYM_NAME_LEN),
 149                 "Validate string length");
 150         ev.type = LTTNG_EVENT_TRACEPOINT;
 151         ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
 152
 153         ret = trace_kernel_create_event(&ev, NULL, NULL, &event);
 154         ok(ret == LTTNG_OK, "Create kernel event");
 155
 156         if (!event) {
 157                 skip(1, "Event is null");
 158                 return;
 159         }
 160
 161         ok(event->fd == -1 &&
 162            event->enabled == 1 &&
 163            event->event->instrumentation == LTTNG_KERNEL_TRACEPOINT &&
 164            strlen(event->event->name),
 165            "Validate kernel event");
 166
 167         /* Init list in order to avoid sefaults from cds_list_del */
 168         CDS_INIT_LIST_HEAD(&event->list);
 169         trace_kernel_destroy_event(event);
 170 }
 171
 172 static void test_create_kernel_stream(void)
 173 {
 174         struct ltt_kernel_stream *stream;
 175
 176         stream = trace_kernel_create_stream("stream1", 0);
 177         ok(stream != NULL, "Create kernel stream");
 178
 179         if (!stream) {
 180                 skip(1, "Stream is null");
 181                 return;
 182         }
 183
 184         ok(stream->fd == -1 &&
 185            stream->state == 0,
 186            "Validate kernel stream");
 187
 188         /* Init list in order to avoid sefaults from cds_list_del */
 189         CDS_INIT_LIST_HEAD(&stream->list);
 190         trace_kernel_destroy_stream(stream);
 191 }
 192
 193 int main(int argc, char **argv)
 194 {
 195         plan_tests(NUM_TESTS);
 196
 197         diag("Kernel data structure unit test");
 198
 199         test_create_one_kernel_session();
 200         test_create_kernel_metadata();
 201         test_create_kernel_channel();
 202         test_create_kernel_event();
 203         test_create_kernel_stream();
 204
 205         /* Success */
 206         return 0;
 207 }