tests/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 "lttng-sessiond/lttng-ust-abi.h"
  30 #include "lttng-share.h"
  31 #include "lttng-sessiond/trace-ust.h"
  32 #include "utils.h"
  33
  34 /* This path will NEVER be created in this test */
  35 #define PATH1 "/tmp/.test-junk-lttng"
  36
  37 /* For lttngerr.h */
  38 int opt_quiet = 1;
  39 int opt_verbose = 0;
  40
  41 static const char alphanum[] =
  42         "0123456789"
  43         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  44         "abcdefghijklmnopqrstuvwxyz";
  45
  46 static struct ltt_ust_session *usess;
  47 static struct lttng_domain dom;
  48
  49 /*
  50  * Return random string of 10 characters.
  51  */
  52 static char *get_random_string(void)
  53 {
  54         int i;
  55         char *str = malloc(11);
  56
  57         for (i = 0; i < 10; i++) {
  58                 str[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  59         }
  60
  61         str[10] = '\0';
  62
  63         return str;
  64 }
  65
  66 static void create_one_ust_session(void)
  67 {
  68         printf("Create UST session: ");
  69
  70         dom.type = LTTNG_DOMAIN_UST;
  71
  72         usess = trace_ust_create_session(PATH1, 42, &dom);
  73         assert(usess != NULL);
  74         PRINT_OK();
  75
  76         printf("Validating UST session: ");
  77         assert(usess->id == 42);
  78         assert(usess->start_trace == 0);
  79         assert(usess->domain_global.channels != NULL);
  80         assert(usess->domain_pid != NULL);
  81         assert(usess->domain_exec != NULL);
  82         assert(usess->uid == 0);
  83         assert(usess->gid == 0);
  84         PRINT_OK();
  85
  86         trace_ust_destroy_session(usess);
  87 }
  88
  89 static void create_ust_metadata(void)
  90 {
  91         struct ltt_ust_metadata *metadata;
  92
  93         assert(usess != NULL);
  94
  95         printf("Create UST metadata: ");
  96         metadata = trace_ust_create_metadata(PATH1);
  97         assert(metadata != NULL);
  98         PRINT_OK();
  99
 100         printf("Validating UST session metadata: ");
 101         assert(metadata->handle == -1);
 102         assert(strlen(metadata->pathname));
 103         assert(metadata->attr.overwrite
 104                         == DEFAULT_CHANNEL_OVERWRITE);
 105         assert(metadata->attr.subbuf_size
 106                         == DEFAULT_METADATA_SUBBUF_SIZE);
 107         assert(metadata->attr.num_subbuf
 108                         == DEFAULT_METADATA_SUBBUF_NUM);
 109         assert(metadata->attr.switch_timer_interval
 110                         == DEFAULT_CHANNEL_SWITCH_TIMER);
 111         assert(metadata->attr.read_timer_interval
 112                         == DEFAULT_CHANNEL_READ_TIMER);
 113         assert(metadata->attr.output == LTTNG_UST_MMAP);
 114         PRINT_OK();
 115
 116         trace_ust_destroy_metadata(metadata);
 117 }
 118
 119 static void create_ust_channel(void)
 120 {
 121         struct ltt_ust_channel *uchan;
 122         struct lttng_channel attr;
 123
 124         strncpy(attr.name, "channel0", 8);
 125
 126         printf("Creating UST channel: ");
 127         uchan = trace_ust_create_channel(&attr, PATH1);
 128         assert(uchan != NULL);
 129         PRINT_OK();
 130
 131         printf("Validating UST channel: ");
 132         assert(uchan->enabled == 0);
 133         assert(strcmp(PATH1, uchan->pathname) == 0);
 134         assert(strncmp(uchan->name, "channel0", 8) == 0);
 135         assert(uchan->name[LTTNG_UST_SYM_NAME_LEN - 1] == '\0');
 136         assert(uchan->ctx != NULL);
 137         assert(uchan->events != NULL);
 138         assert(uchan->attr.overwrite  == attr.attr.overwrite);
 139         PRINT_OK();
 140
 141         trace_ust_destroy_channel(uchan);
 142 }
 143
 144 static void create_ust_event(void)
 145 {
 146         struct ltt_ust_event *event;
 147         struct lttng_event ev;
 148
 149         strncpy(ev.name, get_random_string(), LTTNG_SYMBOL_NAME_LEN);
 150         ev.type = LTTNG_EVENT_TRACEPOINT;
 151
 152         printf("Creating UST event: ");
 153         event = trace_ust_create_event(&ev);
 154         assert(event != NULL);
 155         PRINT_OK();
 156
 157         printf("Validating UST event: ");
 158         assert(event->enabled == 0);
 159         assert(event->ctx != NULL);
 160         assert(event->attr.instrumentation == LTTNG_UST_TRACEPOINT);
 161         assert(strcmp(event->attr.name, ev.name) == 0);
 162         assert(event->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] == '\0');
 163         PRINT_OK();
 164
 165         trace_ust_destroy_event(event);
 166 }
 167
 168 static void create_ust_context(void)
 169 {
 170         struct lttng_event_context ctx;
 171         struct ltt_ust_context *uctx;
 172
 173         printf("Creating UST context: ");
 174         uctx = trace_ust_create_context(&ctx);
 175         assert(uctx != NULL);
 176         PRINT_OK();
 177
 178         printf("Validating UST context: ");
 179         assert(ctx.ctx == uctx->ctx.ctx);
 180         PRINT_OK();
 181 }
 182
 183 int main(int argc, char **argv)
 184 {
 185         printf("\nTesting UST data structures:\n-----------\n");
 186
 187         create_one_ust_session();
 188         create_ust_metadata();
 189         create_ust_channel();
 190         create_ust_event();
 191         create_ust_context();
 192
 193         /* Success */
 194         return 0;
 195 }