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 <bin/lttng-sessiond/lttng-ust-abi.h>
  30 #include <common/lttng-share.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 /* For lttngerr.h */
  39 int opt_quiet = 1;
  40 int opt_verbose = 0;
  41
  42 static const char alphanum[] =
  43         "0123456789"
  44         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  45         "abcdefghijklmnopqrstuvwxyz";
  46
  47 static struct ltt_ust_session *usess;
  48 static struct lttng_domain dom;
  49
  50 /*
  51  * Return random string of 10 characters.
  52  */
  53 static char *get_random_string(void)
  54 {
  55         int i;
  56         char *str = malloc(11);
  57
  58         for (i = 0; i < 10; i++) {
  59                 str[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  60         }
  61
  62         str[10] = '\0';
  63
  64         return str;
  65 }
  66
  67 static void create_one_ust_session(void)
  68 {
  69         printf("Create UST session: ");
  70
  71         dom.type = LTTNG_DOMAIN_UST;
  72
  73         usess = trace_ust_create_session(PATH1, 42, &dom);
  74         assert(usess != NULL);
  75         PRINT_OK();
  76
  77         printf("Validating UST session: ");
  78         assert(usess->id == 42);
  79         assert(usess->start_trace == 0);
  80         assert(usess->domain_global.channels != NULL);
  81         assert(usess->domain_pid != NULL);
  82         assert(usess->domain_exec != NULL);
  83         assert(usess->uid == 0);
  84         assert(usess->gid == 0);
  85         PRINT_OK();
  86
  87         trace_ust_destroy_session(usess);
  88 }
  89
  90 static void create_ust_metadata(void)
  91 {
  92         struct ltt_ust_metadata *metadata;
  93
  94         assert(usess != NULL);
  95
  96         printf("Create UST metadata: ");
  97         metadata = trace_ust_create_metadata(PATH1);
  98         assert(metadata != NULL);
  99         PRINT_OK();
 100
 101         printf("Validating UST session metadata: ");
 102         assert(metadata->handle == -1);
 103         assert(strlen(metadata->pathname));
 104         assert(metadata->attr.overwrite
 105                         == DEFAULT_CHANNEL_OVERWRITE);
 106         assert(metadata->attr.subbuf_size
 107                         == DEFAULT_METADATA_SUBBUF_SIZE);
 108         assert(metadata->attr.num_subbuf
 109                         == DEFAULT_METADATA_SUBBUF_NUM);
 110         assert(metadata->attr.switch_timer_interval
 111                         == DEFAULT_CHANNEL_SWITCH_TIMER);
 112         assert(metadata->attr.read_timer_interval
 113                         == DEFAULT_CHANNEL_READ_TIMER);
 114         assert(metadata->attr.output == LTTNG_UST_MMAP);
 115         PRINT_OK();
 116
 117         trace_ust_destroy_metadata(metadata);
 118 }
 119
 120 static void create_ust_channel(void)
 121 {
 122         struct ltt_ust_channel *uchan;
 123         struct lttng_channel attr;
 124
 125         strncpy(attr.name, "channel0", 8);
 126
 127         printf("Creating UST channel: ");
 128         uchan = trace_ust_create_channel(&attr, PATH1);
 129         assert(uchan != NULL);
 130         PRINT_OK();
 131
 132         printf("Validating UST channel: ");
 133         assert(uchan->enabled == 0);
 134         assert(strcmp(PATH1, uchan->pathname) == 0);
 135         assert(strncmp(uchan->name, "channel0", 8) == 0);
 136         assert(uchan->name[LTTNG_UST_SYM_NAME_LEN - 1] == '\0');
 137         assert(uchan->ctx != NULL);
 138         assert(uchan->events != NULL);
 139         assert(uchan->attr.overwrite  == attr.attr.overwrite);
 140         PRINT_OK();
 141
 142         trace_ust_destroy_channel(uchan);
 143 }
 144
 145 static void create_ust_event(void)
 146 {
 147         struct ltt_ust_event *event;
 148         struct lttng_event ev;
 149
 150         strncpy(ev.name, get_random_string(), LTTNG_SYMBOL_NAME_LEN);
 151         ev.type = LTTNG_EVENT_TRACEPOINT;
 152
 153         printf("Creating UST event: ");
 154         event = trace_ust_create_event(&ev);
 155         assert(event != NULL);
 156         PRINT_OK();
 157
 158         printf("Validating UST event: ");
 159         assert(event->enabled == 0);
 160         assert(event->ctx != NULL);
 161         assert(event->attr.instrumentation == LTTNG_UST_TRACEPOINT);
 162         assert(strcmp(event->attr.name, ev.name) == 0);
 163         assert(event->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] == '\0');
 164         PRINT_OK();
 165
 166         trace_ust_destroy_event(event);
 167 }
 168
 169 static void create_ust_context(void)
 170 {
 171         struct lttng_event_context ctx;
 172         struct ltt_ust_context *uctx;
 173
 174         printf("Creating UST context: ");
 175         uctx = trace_ust_create_context(&ctx);
 176         assert(uctx != NULL);
 177         PRINT_OK();
 178
 179         printf("Validating UST context: ");
 180         assert((int) ctx.ctx == (int)uctx->ctx.ctx);
 181         PRINT_OK();
 182 }
 183
 184 int main(int argc, char **argv)
 185 {
 186         printf("\nTesting UST data structures:\n-----------\n");
 187
 188         create_one_ust_session();
 189         create_ust_metadata();
 190         create_ust_channel();
 191         create_ust_event();
 192         create_ust_context();
 193
 194         /* Success */
 195         return 0;
 196 }