doc/examples/barectf-tracepoint/barectf-tracepoint.c

   1 #include <stdio.h>
   2 #include <stdint.h>
   3 #include <stdlib.h>
   4 #include <time.h>
   5
   6 #if defined(WITH_LTTNG_UST)
   7 #include "barectf-tracepoint-lttng-ust.h"
   8 #elif defined(WITH_QEMU_ARM_UART)
   9 #include "barectf-tracepoint-qemu-arm-uart.h"
  10 #else
  11 #include "barectf-tracepoint-linux-fs.h"
  12 #endif
  13
  14 enum state_t {
  15         NEW,
  16         TERMINATED,
  17         READY,
  18         RUNNING,
  19         WAITING,
  20 };
  21
  22 static void trace_stuff(int argc, char *argv[])
  23 {
  24         int i;
  25         const char *str;
  26
  27         /* record 40000 events */
  28         for (i = 0; i < 5000; ++i) {
  29                 str = argv[i % argc];
  30                 tracepoint(barectf_tp, simple_uint32, i * 1500);
  31                 tracepoint(barectf_tp, simple_int16, -i * 2);
  32                 tracepoint(barectf_tp, simple_float, (float) i / 1.23);
  33                 tracepoint(barectf_tp, simple_string, str);
  34                 tracepoint(barectf_tp, simple_enum, RUNNING);
  35                 tracepoint(barectf_tp, a_few_fields, -1, 301, -3.14159,
  36                            str, NEW);
  37                 tracepoint(barectf_tp, bit_packed_integers, 1, -1, 3,
  38                            -2, 2, 7, 23, -55, 232);
  39                 tracepoint(barectf_tp, simple_enum, TERMINATED);
  40         }
  41 }
  42
  43 #define NUM_STRINGS     5
  44
  45 static char *strings[] = {
  46         "orange",
  47         "mandarine",
  48         "lemon",
  49         "lime",
  50         "grapefruit",
  51 };
  52
  53 int main(int argc, char *argv[])
  54 {
  55         init_tracing();
  56
  57         if (argc <= 1) {
  58                 /* use static strings if there's nothing interesting in argv */
  59                 argc = NUM_STRINGS;
  60                 argv = strings;
  61         }
  62
  63         trace_stuff(argc, argv);
  64         fini_tracing();
  65
  66         return 0;
  67 }