ltt-usertrace/sample-printf.c

   1
   2 #include <stdio.h>
   3 #include <unistd.h>
   4
   5 #define LTT_TRACE
   6 #define LTT_BLOCKING 1
   7 #include <ltt/ltt-facility-user_generic.h>
   8 #include <ltt/ltt-facility-custom-user_generic.h>
   9 // Notice the inclusion of ltt-facility-custom-user_generic.h for the
  10 // slow_printf support
  11
  12
  13 int main(int argc, char **argv)
  14 {
  15         printf("Will trace a printf of an incrementing counter.\n");
  16         printf("Abort with CTRL-C.\n");
  17         printf("No file is created with this example : it logs through a kernel\n");
  18         printf("system call. See the LTTng lttctl command to start tracing.\n");
  19
  20         unsigned int count = 0;
  21
  22         while(1) {
  23                 trace_user_generic_slow_printf("in: %s at: %s:%d: Counter value is: %u.",
  24                                                                                                                                         __FILE__, __func__, __LINE__, count);
  25                 count++;
  26                 sleep(1);
  27         }
  28
  29         return 0;
  30 }
  31