src/libcompiler_builtins/compiler-rt/test/tsan/static_init6.cc

   1 // RUN: %clangxx_tsan -stdlib=libstdc++ -static-libstdc++ -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <sched.h>
   6
   7 struct Cache {
   8   int x;
   9   explicit Cache(int x)
  10     : x(x) {
  11   }
  12 };
  13
  14 void *AsyncInit(void *p) {
  15   return new Cache((int)(long)p);
  16 }
  17
  18 Cache *CreateCache() {
  19   pthread_t t;
  20   pthread_create(&t, 0, AsyncInit, (void*)(long)rand());
  21   void *res;
  22   pthread_join(t, &res);
  23   return (Cache*)res;
  24 }
  25
  26 void *Thread1(void *x) {
  27   static Cache *c = CreateCache();
  28   if (c->x >= RAND_MAX)
  29     exit(1);
  30   return 0;
  31 }
  32
  33 int main() {
  34   pthread_t t[2];
  35   pthread_create(&t[0], 0, Thread1, 0);
  36   pthread_create(&t[1], 0, Thread1, 0);
  37   pthread_join(t[0], 0);
  38   pthread_join(t[1], 0);
  39   fprintf(stderr, "PASS\n");
  40 }
  41
  42 // CHECK-NOT: WARNING: ThreadSanitizer: data race