tests/tools/test_ust_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 <lttng/lttng.h>
  29 #include <bin/lttng-sessiond/lttng-ust-abi.h>
  30 #include <common/defaults.h>
  31 #include <bin/lttng-sessiond/trace-ust.h>
  32
  33 #include "utils.h"
  34
  35 /* This path will NEVER be created in this test */
  36 #define PATH1 "/tmp/.test-junk-lttng"
  37
  38 #define RANDOM_STRING_LEN       11
  39
  40 /* For lttngerr.h */
  41 int lttng_opt_quiet = 1;
  42 int lttng_opt_verbose;
  43
  44 static const char alphanum[] =
  45         "0123456789"
  46         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  47         "abcdefghijklmnopqrstuvwxyz";
  48 static char random_string[RANDOM_STRING_LEN];
  49
  50 static struct ltt_ust_session *usess;
  51 static struct lttng_domain dom;
  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 create_one_ust_session(void)
  71 {
  72         printf("Create UST session: ");
  73
  74         dom.type = LTTNG_DOMAIN_UST;
  75
  76         usess = trace_ust_create_session(PATH1, 42, &dom);
  77         assert(usess != NULL);
  78         PRINT_OK();
  79
  80         printf("Validating UST session: ");
  81         assert(usess->id == 42);
  82         assert(usess->start_trace == 0);
  83         assert(usess->domain_global.channels != NULL);
  84         assert(usess->domain_pid != NULL);
  85         assert(usess->domain_exec != NULL);
  86         assert(usess->uid == 0);
  87         assert(usess->gid == 0);
  88         PRINT_OK();
  89
  90         trace_ust_destroy_session(usess);
  91 }
  92
  93 static void create_ust_metadata(void)
  94 {
  95         struct ltt_ust_metadata *metadata;
  96
  97         assert(usess != NULL);
  98
  99         printf("Create UST metadata: ");
 100         metadata = trace_ust_create_metadata(PATH1);
 101         assert(metadata != NULL);
 102         PRINT_OK();
 103
 104         printf("Validating UST session metadata: ");
 105         assert(metadata->handle == -1);
 106         assert(strlen(metadata->pathname));
 107         assert(metadata->attr.overwrite
 108                         == DEFAULT_CHANNEL_OVERWRITE);
 109         assert(metadata->attr.subbuf_size
 110                         == default_get_metadata_subbuf_size());
 111         assert(metadata->attr.num_subbuf
 112                         == DEFAULT_METADATA_SUBBUF_NUM);
 113         assert(metadata->attr.switch_timer_interval
 114                         == DEFAULT_CHANNEL_SWITCH_TIMER);
 115         assert(metadata->attr.read_timer_interval
 116                         == DEFAULT_CHANNEL_READ_TIMER);
 117         assert(metadata->attr.output == LTTNG_UST_MMAP);
 118         PRINT_OK();
 119
 120         trace_ust_destroy_metadata(metadata);
 121 }
 122
 123 static void create_ust_channel(void)
 124 {
 125         struct ltt_ust_channel *uchan;
 126         struct lttng_channel attr;
 127
 128         memset(&attr, 0, sizeof(attr));
 129
 130         strncpy(attr.name, "channel0", 8);
 131
 132         printf("Creating UST channel: ");
 133         uchan = trace_ust_create_channel(&attr, PATH1);
 134         assert(uchan != NULL);
 135         PRINT_OK();
 136
 137         printf("Validating UST channel: ");
 138         assert(uchan->enabled == 0);
 139         assert(strcmp(PATH1, uchan->pathname) == 0);
 140         assert(strncmp(uchan->name, "channel0", 8) == 0);
 141         assert(uchan->name[LTTNG_UST_SYM_NAME_LEN - 1] == '\0');
 142         assert(uchan->ctx != NULL);
 143         assert(uchan->events != NULL);
 144         assert(uchan->attr.overwrite  == attr.attr.overwrite);
 145         PRINT_OK();
 146
 147         trace_ust_destroy_channel(uchan);
 148 }
 149
 150 static void create_ust_event(void)
 151 {
 152         struct ltt_ust_event *event;
 153         struct lttng_event ev;
 154
 155         memset(&ev, 0, sizeof(ev));
 156         strncpy(ev.name, get_random_string(), LTTNG_SYMBOL_NAME_LEN);
 157         ev.type = LTTNG_EVENT_TRACEPOINT;
 158         ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
 159
 160         printf("Creating UST event: ");
 161         event = trace_ust_create_event(&ev);
 162         assert(event != NULL);
 163         PRINT_OK();
 164
 165         printf("Validating UST event: ");
 166         assert(event->enabled == 0);
 167         assert(event->attr.instrumentation == LTTNG_UST_TRACEPOINT);
 168         assert(strcmp(event->attr.name, ev.name) == 0);
 169         assert(event->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] == '\0');
 170         PRINT_OK();
 171
 172         trace_ust_destroy_event(event);
 173 }
 174
 175 static void create_ust_context(void)
 176 {
 177         struct lttng_event_context ectx;
 178         struct ltt_ust_context *uctx;
 179
 180         ectx.ctx = LTTNG_EVENT_CONTEXT_VTID;
 181
 182         printf("Creating UST context: ");
 183         uctx = trace_ust_create_context(&ectx);
 184         assert(uctx != NULL);
 185         PRINT_OK();
 186
 187         printf("Validating UST context: ");
 188         assert((int) uctx->ctx.ctx == LTTNG_UST_CONTEXT_VTID);
 189         PRINT_OK();
 190 }
 191
 192 int main(int argc, char **argv)
 193 {
 194         printf("\nTesting UST data structures:\n-----------\n");
 195
 196         create_one_ust_session();
 197         create_ust_metadata();
 198         create_ust_channel();
 199         create_ust_event();
 200         create_ust_context();
 201
 202         /* Success */
 203         return 0;
 204 }