compiler-rt/test/asan/TestCases/use-after-poison.cpp

   1 // Check that __asan_poison_memory_region works.
   2 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
   3 //
   4 // Check that we can disable it
   5 // RUN: %env_asan_opts=allow_user_poisoning=0 %run %t
   6
   7 #include <stdlib.h>
   8
   9 extern "C" void __asan_poison_memory_region(void *, size_t);
  10
  11 int main(int argc, char **argv) {
  12   char *x = new char[16];
  13   x[10] = 0;
  14   __asan_poison_memory_region(x, 16);
  15   int res = x[argc * 10];  // BOOOM
  16   // CHECK: ERROR: AddressSanitizer: use-after-poison
  17   // CHECK: main{{.*}}use-after-poison.cpp:[[@LINE-2]]
  18   delete [] x;
  19   return res;
  20 }