C++ (Cpp) access_p示例

示例#1

文件： vptr.cpp 项目： 32bitmicro/riscv-compiler-rt

int main(int argc, char **argv) {
  assert(argc > 1);
  fprintf(stderr, "Test case: %s\n", argv[1]);
  T t;
  (void)t.a;
  (void)t.b;
  (void)t.f();
  (void)t.g();
  (void)t.v();
  (void)t.S::v();

  U u;
  (void)u.T::a;
  (void)u.b;
  (void)u.T::f();
  (void)u.g();
  (void)u.v();
  (void)u.T::v();
  (void)((T&)u).S::v();

  char Buffer[sizeof(U)] = {};
  char TStorage[sizeof(T)];
  switch (argv[1][1]) {
  case '0':
    p = reinterpret_cast<T*>(Buffer);
    break;
  case 'S':
    // Make sure p points to the memory chunk of sufficient size to prevent ASan
    // reports about out-of-bounds access.
    p = reinterpret_cast<T*>(new(TStorage) S);
    break;
  case 'T':
    p = new T;
    break;
  case 'U':
    p = new U;
    break;
  case 'V':
    p = reinterpret_cast<T*>(new U);
    break;
  }

  access_p(p, argv[1][0]);
  return 0;
}

示例#2

文件： vptr.cpp 项目： chubbymaggie/compiler-rt

int main(int, char **argv) {
  T t;
  (void)t.a;
  (void)t.b;
  (void)t.f();
  (void)t.g();
  (void)t.v();
  (void)t.S::v();

  U u;
  (void)u.T::a;
  (void)u.b;
  (void)u.T::f();
  (void)u.g();
  (void)u.v();
  (void)u.T::v();
  (void)((T&)u).S::v();

  char Buffer[sizeof(U)] = {};
  switch (argv[1][1]) {
  case '0':
    p = reinterpret_cast<T*>(Buffer);
    break;
  case 'S':
    p = reinterpret_cast<T*>(new S);
    break;
  case 'T':
    p = new T;
    break;
  case 'U':
    p = new U;
    break;
  case 'V':
    p = reinterpret_cast<T*>(new U);
    break;
  }

  access_p(p, argv[1][0]);
  return 0;
}