compiler-rt/test/tsan/malloc_overflow.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t
   2 // RUN: %env_tsan_opts=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     fprintf(stderr, "FAIL malloc(-1) = %p\n", p);
  10   p = malloc((size_t)-1 / 2);
  11   if (p != 0)
  12     fprintf(stderr, "FAIL malloc(-1/2) = %p\n", p);
  13   p = calloc((size_t)-1, (size_t)-1);
  14   if (p != 0)
  15     fprintf(stderr, "FAIL calloc(-1, -1) = %p\n", p);
  16   p = calloc((size_t)-1 / 2, (size_t)-1 / 2);
  17   if (p != 0)
  18     fprintf(stderr, "FAIL calloc(-1/2, -1/2) = %p\n", p);
  19   fprintf(stderr, "OK\n");
  20 }
  21
  22 // CHECK-NOT: FAIL
  23 // CHECK-NOT: failed to allocate