tests/unit/test_kernel_data.c

   1 /*
   2  * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #include <assert.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include <time.h>
  14
  15 #include <common/compat/errno.h>
  16 #include <bin/lttng-sessiond/trace-kernel.h>
  17 #include <common/defaults.h>
  18
  19 #include <tap/tap.h>
  20
  21 #define RANDOM_STRING_LEN       11
  22
  23 /* Number of TAP tests in this file */
  24 #define NUM_TESTS 11
  25
  26 static const char alphanum[] =
  27         "0123456789"
  28         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  29         "abcdefghijklmnopqrstuvwxyz";
  30
  31 static struct ltt_kernel_session *kern;
  32 static char random_string[RANDOM_STRING_LEN];
  33
  34 /*
  35  * Return random string of 10 characters.
  36  * Not thread-safe.
  37  */
  38 static char *get_random_string(void)
  39 {
  40         int i;
  41
  42         for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
  43                 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
  44         }
  45
  46         random_string[RANDOM_STRING_LEN - 1] = '\0';
  47
  48         return random_string;
  49 }
  50
  51 static void test_create_one_kernel_session(void)
  52 {
  53         kern = trace_kernel_create_session();
  54         ok(kern != NULL, "Create kernel session");
  55
  56         if (!kern) {
  57                 skip(1, "Kernel session is null");
  58                 return;
  59         }
  60         ok(kern->fd == -1 &&
  61            kern->metadata_stream_fd == -1 &&
  62            kern->consumer_fds_sent == 0 &&
  63            kern->channel_count == 0 &&
  64            kern->stream_count_global == 0 &&
  65            kern->metadata == NULL,
  66            "Validate kernel session");
  67 }
  68
  69 static void test_create_kernel_metadata(void)
  70 {
  71         assert(kern != NULL);
  72
  73         kern->metadata = trace_kernel_create_metadata();
  74         ok(kern->metadata != NULL, "Create kernel metadata");
  75
  76         ok(kern->metadata->fd == -1 &&
  77            kern->metadata->conf != NULL &&
  78            kern->metadata->conf->attr.overwrite
  79                         == DEFAULT_METADATA_OVERWRITE &&
  80            kern->metadata->conf->attr.subbuf_size
  81                         == default_get_metadata_subbuf_size() &&
  82            kern->metadata->conf->attr.num_subbuf
  83                         == DEFAULT_METADATA_SUBBUF_NUM &&
  84            kern->metadata->conf->attr.switch_timer_interval
  85                         == DEFAULT_METADATA_SWITCH_TIMER &&
  86            kern->metadata->conf->attr.read_timer_interval
  87                         == DEFAULT_METADATA_READ_TIMER &&
  88            kern->metadata->conf->attr.output
  89                         == LTTNG_EVENT_MMAP,
  90            "Validate kernel session metadata");
  91
  92         trace_kernel_destroy_metadata(kern->metadata);
  93 }
  94
  95 static void test_create_kernel_channel(void)
  96 {
  97         struct ltt_kernel_channel *chan;
  98         struct lttng_channel attr;
  99         struct lttng_channel_extended extended;
 100
 101         memset(&attr, 0, sizeof(attr));
 102         memset(&extended, 0, sizeof(extended));
 103         attr.attr.extended.ptr = &extended;
 104
 105         chan = trace_kernel_create_channel(&attr);
 106         ok(chan != NULL, "Create kernel channel");
 107
 108         if (!chan) {
 109                 skip(1, "Channel is null");
 110                 return;
 111         }
 112
 113         ok(chan->fd == -1 &&
 114            chan->enabled == 1 &&
 115            chan->stream_count == 0 &&
 116            chan->channel->attr.overwrite  == attr.attr.overwrite,
 117            "Validate kernel channel");
 118
 119         /* Init list in order to avoid sefaults from cds_list_del */
 120         CDS_INIT_LIST_HEAD(&chan->list);
 121         trace_kernel_destroy_channel(chan);
 122 }
 123
 124 static void test_create_kernel_event(void)
 125 {
 126         enum lttng_error_code ret;
 127         struct ltt_kernel_event *event;
 128         struct lttng_event ev;
 129
 130         memset(&ev, 0, sizeof(ev));
 131         ok(!lttng_strncpy(ev.name, get_random_string(),
 132                         RANDOM_STRING_LEN),
 133                 "Validate string length");
 134         ev.type = LTTNG_EVENT_TRACEPOINT;
 135         ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
 136
 137         ret = trace_kernel_create_event(&ev, NULL, NULL, &event);
 138         ok(ret == LTTNG_OK, "Create kernel event");
 139
 140         if (!event) {
 141                 skip(1, "Event is null");
 142                 return;
 143         }
 144
 145         ok(event->fd == -1 &&
 146            event->enabled == 1 &&
 147            event->event->instrumentation == LTTNG_KERNEL_ABI_TRACEPOINT &&
 148            strlen(event->event->name),
 149            "Validate kernel event");
 150
 151         /* Init list in order to avoid sefaults from cds_list_del */
 152         CDS_INIT_LIST_HEAD(&event->list);
 153         trace_kernel_destroy_event(event);
 154 }
 155
 156 static void test_create_kernel_stream(void)
 157 {
 158         struct ltt_kernel_stream *stream;
 159
 160         stream = trace_kernel_create_stream("stream1", 0);
 161         ok(stream != NULL, "Create kernel stream");
 162
 163         if (!stream) {
 164                 skip(1, "Stream is null");
 165                 return;
 166         }
 167
 168         ok(stream->fd == -1 &&
 169            stream->state == 0,
 170            "Validate kernel stream");
 171
 172         /* Init list in order to avoid sefaults from cds_list_del */
 173         CDS_INIT_LIST_HEAD(&stream->list);
 174         trace_kernel_destroy_stream(stream);
 175 }
 176
 177 int main(int argc, char **argv)
 178 {
 179         plan_tests(NUM_TESTS);
 180
 181         diag("Kernel data structure unit test");
 182
 183         test_create_one_kernel_session();
 184         test_create_kernel_metadata();
 185         test_create_kernel_channel();
 186         test_create_kernel_event();
 187         test_create_kernel_stream();
 188
 189         return exit_status();
 190 }