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      1 // RUN: %clang_tsan -O1 %s -o %t && %env_tsan_opts=flush_memory_ms=1:memory_limit_mb=1 %run %t 2>&1 | FileCheck %s
      2 #include "test.h"
      3 #include <sys/types.h>
      4 #include <unistd.h>
      5 #include <time.h>
      6 
      7 // Test that setuid call works in presence of stoptheworld.
      8 
      9 int main() {
     10   unsigned long long tp0, tp1;
     11   tp0 = monotonic_clock_ns();
     12   tp1 = monotonic_clock_ns();
     13   while (tp1 - tp0 < 3 * 1000000000ull) {
     14     tp1 = monotonic_clock_ns();
     15     setuid(0);
     16   }
     17   fprintf(stderr, "DONE\n");
     18   return 0;
     19 }
     20 
     21 // CHECK: DONE
     22