gcc/testsuite/c-c++-common/tsan/simple_race.c

   1 /* { dg-set-target-env-var TSAN_OPTIONS "halt_on_error=1" } */
   2 /* { dg-shouldfail "tsan" } */
   3
   4 #include <pthread.h>
   5 #include <stdio.h>
   6 #include <unistd.h>
   7
   8 #define MAX_ITERATIONS_NUMBER 100
   9 #define SLEEP_STEP 128000
  10
  11 unsigned int delay_time = 1000;
  12
  13 static inline void delay () {
  14   usleep(delay_time);
  15 }
  16
  17 extern int main_1();
  18
  19 int main() {
  20   int i;
  21   for (i = 0; i < MAX_ITERATIONS_NUMBER; i++) {
  22     main_1();
  23     delay_time += delay_time < 256000 ? delay_time : SLEEP_STEP;
  24   }
  25   return 0;
  26 }
  27
  28 int Global;
  29
  30 void *Thread1(void *x) {
  31   delay();
  32   Global = 42;
  33   return NULL;
  34 }
  35
  36 void *Thread2(void *x) {
  37   Global = 43;
  38   return NULL;
  39 }
  40
  41 int main_1() {
  42   pthread_t t[2];
  43   pthread_create(&t[0], NULL, Thread1, NULL);
  44   pthread_create(&t[1], NULL, Thread2, NULL);
  45   pthread_join(t[0], NULL);
  46   pthread_join(t[1], NULL);
  47   return 0;
  48 }
  49
  50 /* { dg-output "WARNING: ThreadSanitizer: data race.*(\n|\r\n|\r)" } */