src/compiler-rt/test/tsan/static_init2.cc

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5
   6 struct Cache {
   7   int x;
   8   explicit Cache(int x)
   9     : x(x) {
  10   }
  11 };
  12
  13 void foo(Cache *my) {
  14   static Cache *c = my ? my : new Cache(rand());
  15   if (c->x >= RAND_MAX)
  16     exit(1);
  17 }
  18
  19 void *Thread(void *x) {
  20   foo(new Cache(rand()));
  21   return 0;
  22 }
  23
  24 int main() {
  25   pthread_t t[2];
  26   pthread_create(&t[0], 0, Thread, 0);
  27   pthread_create(&t[1], 0, Thread, 0);
  28   pthread_join(t[0], 0);
  29   pthread_join(t[1], 0);
  30   fprintf(stderr, "PASS\n");
  31 }
  32
  33 // CHECK-NOT: WARNING: ThreadSanitizer: data race