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      1 // RUN: %clangxx_tsan -O1 %s -o %t
      2 // RUN: TSAN_OPTIONS=allocator_may_return_null=1 %run %t 2>&1 | FileCheck %s
      3 #include <stdio.h>
      4 #include <stdlib.h>
      5 
      6 int main() {
      7   void *p = malloc((size_t)-1);
      8   if (p != 0)
      9     printf("FAIL malloc(-1) = %p\n", p);
     10   p = malloc((size_t)-1 / 2);
     11   if (p != 0)
     12     printf("FAIL malloc(-1/2) = %p\n", p);
     13   p = calloc((size_t)-1, (size_t)-1);
     14   if (p != 0)
     15     printf("FAIL calloc(-1, -1) = %p\n", p);
     16   p = calloc((size_t)-1 / 2, (size_t)-1 / 2);
     17   if (p != 0)
     18     printf("FAIL calloc(-1/2, -1/2) = %p\n", p);
     19   printf("OK\n");
     20 }
     21 
     22 // CHECK-NOT: FAIL
     23 // CHECK-NOT: failed to allocate
     24