compiler-rt/test/ubsan/TestCases/Misc/enum.cpp

   1 // RUN: %clangxx -fsanitize=enum %s -O3 -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK
   2
   3 // FIXME: UBSan fails to add the correct instrumentation code for some reason on
   4 // Windows.
   5 // XFAIL: target={{.*windows-msvc.*}}
   6
   7 enum E { a = 1 };
   8 enum class EClass { a = 1 };
   9 enum class EBool : bool { a = 1 } e3;
  10 enum EEmpty {};
  11 enum EMinus { em = -1 };
  12
  13 int main(int argc, char **argv) {
  14   E e1 = static_cast<E>(0xFFFFFFFF);
  15   EClass e2 = static_cast<EClass>(0xFFFFFFFF);
  16   EEmpty e4 = static_cast<EEmpty>(1);
  17   EEmpty e5 = static_cast<EEmpty>(2);
  18   EMinus e6 = static_cast<EMinus>(1);
  19   EMinus e7 = static_cast<EMinus>(2);
  20
  21   for (unsigned char *p = (unsigned char *)&e3; p != (unsigned char *)(&e3 + 1);
  22        ++p)
  23     *p = 0xff;
  24
  25   return ((int)e1 != -1) & ((int)e2 != -1) &
  26          // CHECK: error: load of value 4294967295, which is not a valid value for type 'E'
  27          ((int)e3 != -1) & ((int)e4 == 1) &
  28          // CHECK: error: load of value <unknown>, which is not a valid value for type 'enum EBool'
  29          ((int)e5 == 2) & ((int)e6 == 1) &
  30          // CHECK: error: load of value 2, which is not a valid value for type 'EEmpty'
  31          ((int)e7 == 2);
  32   // CHECK: error: load of value 2, which is not a valid value for type 'EMinus'
  33 }