| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This test case checks specifically the cases under bullet 3.1 & 3.2: |
| // |
| // C++ ABI 15.3: |
| // A handler is a match for an exception object of type E if |
| // * The handler is of type cv T or cv T& and E and T are the same type |
| // (ignoring the top-level cv-qualifiers), or |
| // * the handler is of type cv T or cv T& and T is an unambiguous base |
| // class of E, or |
| // > * the handler is of type cv1 T* cv2 and E is a pointer type that can < |
| // > be converted to the type of the handler by either or both of < |
| // > o a standard pointer conversion (4.10 [conv.ptr]) not involving < |
| // > conversions to private or protected or ambiguous classes < |
| // > o a qualification conversion < |
| // * the handler is a pointer or pointer to member type and E is |
| // std::nullptr_t |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: no-exceptions |
| |
| #include <exception> |
| #include <stdlib.h> |
| #include <assert.h> |
| #include <stdio.h> |
| |
| struct Base {}; |
| struct Derived : Base {}; |
| struct Derived2 : Base {}; |
| struct Ambiguous : Derived, Derived2 {}; |
| struct Private : private Base {}; |
| struct Protected : protected Base {}; |
| |
| template <typename T // Handler type |
| ,typename E // Thrown exception type |
| ,typename O // Object type |
| > |
| void assert_catches() |
| { |
| try |
| { |
| O o; |
| throw static_cast<E>(&o); |
| printf("%s\n", __PRETTY_FUNCTION__); |
| assert(false && "Statements after throw must be unreachable"); |
| } |
| catch (T t) |
| { |
| assert(true); |
| return; |
| } |
| catch (...) |
| { |
| printf("%s\n", __PRETTY_FUNCTION__); |
| assert(false && "Should not have entered catch-all"); |
| } |
| |
| printf("%s\n", __PRETTY_FUNCTION__); |
| assert(false && "The catch should have returned"); |
| } |
| |
| template <typename T // Handler type |
| ,typename E // Thrown exception type |
| ,typename O // Object type |
| > |
| void assert_cannot_catch() |
| { |
| try |
| { |
| O o; |
| throw static_cast<E>(&o); |
| printf("%s\n", __PRETTY_FUNCTION__); |
| assert(false && "Statements after throw must be unreachable"); |
| } |
| catch (T t) |
| { |
| printf("%s\n", __PRETTY_FUNCTION__); |
| assert(false && "Should not have entered the catch"); |
| } |
| catch (...) |
| { |
| assert(true); |
| return; |
| } |
| |
| printf("%s\n", __PRETTY_FUNCTION__); |
| assert(false && "The catch-all should have returned"); |
| } |
| |
| void f1() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 |
| // catches an exception of type: |
| // Derived * |
| assert_catches< Base * , Derived *, Derived>(); |
| assert_catches<const Base * , Derived *, Derived>(); |
| assert_catches< volatile Base * , Derived *, Derived>(); |
| assert_catches<const volatile Base * , Derived *, Derived>(); |
| assert_catches< Base * const , Derived *, Derived>(); |
| assert_catches<const Base * const , Derived *, Derived>(); |
| assert_catches< volatile Base * const , Derived *, Derived>(); |
| assert_catches<const volatile Base * const , Derived *, Derived>(); |
| assert_catches< Base * volatile, Derived *, Derived>(); |
| assert_catches<const Base * volatile, Derived *, Derived>(); |
| assert_catches< volatile Base * volatile, Derived *, Derived>(); |
| assert_catches<const volatile Base * volatile, Derived *, Derived>(); |
| assert_catches< Base * const volatile, Derived *, Derived>(); |
| assert_catches<const Base * const volatile, Derived *, Derived>(); |
| assert_catches< volatile Base * const volatile, Derived *, Derived>(); |
| assert_catches<const volatile Base * const volatile, Derived *, Derived>(); |
| } |
| |
| void f2() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 |
| // catches an exception of type: |
| // Base * |
| assert_catches< Base * , Base *, Derived>(); |
| assert_catches<const Base * , Base *, Derived>(); |
| assert_catches< volatile Base * , Base *, Derived>(); |
| assert_catches<const volatile Base * , Base *, Derived>(); |
| assert_catches< Base * const , Base *, Derived>(); |
| assert_catches<const Base * const , Base *, Derived>(); |
| assert_catches< volatile Base * const , Base *, Derived>(); |
| assert_catches<const volatile Base * const , Base *, Derived>(); |
| assert_catches< Base * volatile, Base *, Derived>(); |
| assert_catches<const Base * volatile, Base *, Derived>(); |
| assert_catches< volatile Base * volatile, Base *, Derived>(); |
| assert_catches<const volatile Base * volatile, Base *, Derived>(); |
| assert_catches< Base * const volatile, Base *, Derived>(); |
| assert_catches<const Base * const volatile, Base *, Derived>(); |
| assert_catches< volatile Base * const volatile, Base *, Derived>(); |
| assert_catches<const volatile Base * const volatile, Base *, Derived>(); |
| } |
| |
| void f3() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Derived * cv2 |
| // catches an exception of type: |
| // Derived * |
| assert_catches< Derived * , Derived *, Derived>(); |
| assert_catches<const Derived * , Derived *, Derived>(); |
| assert_catches< volatile Derived * , Derived *, Derived>(); |
| assert_catches<const volatile Derived * , Derived *, Derived>(); |
| assert_catches< Derived * const , Derived *, Derived>(); |
| assert_catches<const Derived * const , Derived *, Derived>(); |
| assert_catches< volatile Derived * const , Derived *, Derived>(); |
| assert_catches<const volatile Derived * const , Derived *, Derived>(); |
| assert_catches< Derived * volatile, Derived *, Derived>(); |
| assert_catches<const Derived * volatile, Derived *, Derived>(); |
| assert_catches< volatile Derived * volatile, Derived *, Derived>(); |
| assert_catches<const volatile Derived * volatile, Derived *, Derived>(); |
| assert_catches< Derived * const volatile, Derived *, Derived>(); |
| assert_catches<const Derived * const volatile, Derived *, Derived>(); |
| assert_catches< volatile Derived * const volatile, Derived *, Derived>(); |
| assert_catches<const volatile Derived * const volatile, Derived *, Derived>(); |
| } |
| |
| void f4() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Derived * cv2 |
| // cannot catch an exception of type: |
| // Base * |
| assert_cannot_catch< Derived * , Base *, Derived>(); |
| assert_cannot_catch<const Derived * , Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * , Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * , Base *, Derived>(); |
| assert_cannot_catch< Derived * const , Base *, Derived>(); |
| assert_cannot_catch<const Derived * const , Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * const , Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * const , Base *, Derived>(); |
| assert_cannot_catch< Derived * volatile, Base *, Derived>(); |
| assert_cannot_catch<const Derived * volatile, Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * volatile, Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * volatile, Base *, Derived>(); |
| assert_cannot_catch< Derived * const volatile, Base *, Derived>(); |
| assert_cannot_catch<const Derived * const volatile, Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * const volatile, Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * const volatile, Base *, Derived>(); |
| } |
| |
| void f5() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Derived * cv2 & |
| // catches an exception of type: |
| // Derived * |
| assert_catches< Derived * &, Derived *, Derived>(); |
| assert_catches<const Derived * &, Derived *, Derived>(); |
| assert_catches< volatile Derived * &, Derived *, Derived>(); |
| assert_catches<const volatile Derived * &, Derived *, Derived>(); |
| assert_catches< Derived * const &, Derived *, Derived>(); |
| assert_catches<const Derived * const &, Derived *, Derived>(); |
| assert_catches< volatile Derived * const &, Derived *, Derived>(); |
| assert_catches<const volatile Derived * const &, Derived *, Derived>(); |
| assert_catches< Derived * volatile &, Derived *, Derived>(); |
| assert_catches<const Derived * volatile &, Derived *, Derived>(); |
| assert_catches< volatile Derived * volatile &, Derived *, Derived>(); |
| assert_catches<const volatile Derived * volatile &, Derived *, Derived>(); |
| assert_catches< Derived * const volatile &, Derived *, Derived>(); |
| assert_catches<const Derived * const volatile &, Derived *, Derived>(); |
| assert_catches< volatile Derived * const volatile &, Derived *, Derived>(); |
| assert_catches<const volatile Derived * const volatile &, Derived *, Derived>(); |
| } |
| |
| void f6() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 & |
| // catches an exception of type: |
| // Base * |
| assert_catches< Base * &, Base *, Derived>(); |
| assert_catches<const Base * &, Base *, Derived>(); |
| assert_catches< volatile Base * &, Base *, Derived>(); |
| assert_catches<const volatile Base * &, Base *, Derived>(); |
| assert_catches< Base * const &, Base *, Derived>(); |
| assert_catches<const Base * const &, Base *, Derived>(); |
| assert_catches< volatile Base * const &, Base *, Derived>(); |
| assert_catches<const volatile Base * const &, Base *, Derived>(); |
| assert_catches< Base * volatile &, Base *, Derived>(); |
| assert_catches<const Base * volatile &, Base *, Derived>(); |
| assert_catches< volatile Base * volatile &, Base *, Derived>(); |
| assert_catches<const volatile Base * volatile &, Base *, Derived>(); |
| assert_catches< Base * const volatile &, Base *, Derived>(); |
| assert_catches<const Base * const volatile &, Base *, Derived>(); |
| assert_catches< volatile Base * const volatile &, Base *, Derived>(); |
| assert_catches<const volatile Base * const volatile &, Base *, Derived>(); |
| |
| } |
| |
| void f7() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Derived * cv2 & |
| // cannot catch an exception of type: |
| // Base * |
| assert_cannot_catch< Derived * &, Base *, Derived>(); |
| assert_cannot_catch<const Derived * &, Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * &, Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * &, Base *, Derived>(); |
| assert_cannot_catch< Derived * const &, Base *, Derived>(); |
| assert_cannot_catch<const Derived * const &, Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * const &, Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * const &, Base *, Derived>(); |
| assert_cannot_catch< Derived * volatile &, Base *, Derived>(); |
| assert_cannot_catch<const Derived * volatile &, Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * volatile &, Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * volatile &, Base *, Derived>(); |
| assert_cannot_catch< Derived * const volatile &, Base *, Derived>(); |
| assert_cannot_catch<const Derived * const volatile &, Base *, Derived>(); |
| assert_cannot_catch< volatile Derived * const volatile &, Base *, Derived>(); |
| assert_cannot_catch<const volatile Derived * const volatile &, Base *, Derived>(); |
| } |
| |
| void f8() |
| { |
| // This test case has a caveat noted in the discussion here: |
| // https://gcc.gnu.org/ml/gcc-patches/2009-08/msg00264.html |
| // Specifically: |
| // This [test exposes a] corner case of the ARM C++ ABI. The generic C++ |
| // ABI also gets this wrong, because I failed to notice the subtlety here. |
| // The issue is that 15.3/3 3rd bullet says: |
| // The handler is of type cv1 T* cv2 and E is a pointer type that |
| // can be converted to the type of the handler by either or both of: |
| // * a standard pointer conversion (4.10) not involving conversions |
| // to pointers to private or protected or ambiguous classes |
| // Notice that the handlers of type "cv1 T*cv2&" are not allowed such |
| // freedom to find a base class. The ABI error is that we treat handlers |
| // of reference type exactly the same as the corresponding hander of |
| // non-reference type. Elsewhere in the exception handling this makes no |
| // difference (for instance bullet 1 explicitly says 'cv T or cv T&'). |
| // |
| // See also: http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#388 |
| // |
| // TL;DR: it is an unresolved C++ ABI defect that these do catch |
| |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 & |
| // catches an exception of type: |
| // Derived * |
| assert_catches< Base * &, Derived *, Derived>(); |
| assert_catches<const Base * &, Derived *, Derived>(); |
| assert_catches< volatile Base * &, Derived *, Derived>(); |
| assert_catches<const volatile Base * &, Derived *, Derived>(); |
| assert_catches< Base * const &, Derived *, Derived>(); |
| assert_catches<const Base * const &, Derived *, Derived>(); |
| assert_catches< volatile Base * const &, Derived *, Derived>(); |
| assert_catches<const volatile Base * const &, Derived *, Derived>(); |
| assert_catches< Base * volatile &, Derived *, Derived>(); |
| assert_catches<const Base * volatile &, Derived *, Derived>(); |
| assert_catches< volatile Base * volatile &, Derived *, Derived>(); |
| assert_catches<const volatile Base * volatile &, Derived *, Derived>(); |
| assert_catches< Base * const volatile &, Derived *, Derived>(); |
| assert_catches<const Base * const volatile &, Derived *, Derived>(); |
| assert_catches< volatile Base * const volatile &, Derived *, Derived>(); |
| assert_catches<const volatile Base * const volatile &, Derived *, Derived>(); |
| } |
| |
| void f9() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 |
| // cannot catch an exception of type: |
| // Ambiguous * |
| assert_cannot_catch< Base * , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const Base * , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch< volatile Base * , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const volatile Base * , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch< Base * const , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const Base * const , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch< volatile Base * const , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const volatile Base * const , Ambiguous *, Ambiguous>(); |
| assert_cannot_catch< Base * volatile, Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const Base * volatile, Ambiguous *, Ambiguous>(); |
| assert_cannot_catch< volatile Base * volatile, Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const volatile Base * volatile, Ambiguous *, Ambiguous>(); |
| assert_cannot_catch< Base * const volatile, Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const Base * const volatile, Ambiguous *, Ambiguous>(); |
| assert_cannot_catch< volatile Base * const volatile, Ambiguous *, Ambiguous>(); |
| assert_cannot_catch<const volatile Base * const volatile, Ambiguous *, Ambiguous>(); |
| } |
| |
| void f10() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 |
| // cannot catch an exception of type: |
| // Private * |
| assert_cannot_catch< Base * , Private *, Private>(); |
| assert_cannot_catch<const Base * , Private *, Private>(); |
| assert_cannot_catch< volatile Base * , Private *, Private>(); |
| assert_cannot_catch<const volatile Base * , Private *, Private>(); |
| assert_cannot_catch< Base * const , Private *, Private>(); |
| assert_cannot_catch<const Base * const , Private *, Private>(); |
| assert_cannot_catch< volatile Base * const , Private *, Private>(); |
| assert_cannot_catch<const volatile Base * const , Private *, Private>(); |
| assert_cannot_catch< Base * volatile, Private *, Private>(); |
| assert_cannot_catch<const Base * volatile, Private *, Private>(); |
| assert_cannot_catch< volatile Base * volatile, Private *, Private>(); |
| assert_cannot_catch<const volatile Base * volatile, Private *, Private>(); |
| assert_cannot_catch< Base * const volatile, Private *, Private>(); |
| assert_cannot_catch<const Base * const volatile, Private *, Private>(); |
| assert_cannot_catch< volatile Base * const volatile, Private *, Private>(); |
| assert_cannot_catch<const volatile Base * const volatile, Private *, Private>(); |
| } |
| |
| void f11() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 |
| // cannot catch an exception of type: |
| // Protected * |
| assert_cannot_catch< Base * , Protected *, Protected>(); |
| assert_cannot_catch<const Base * , Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * , Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * , Protected *, Protected>(); |
| assert_cannot_catch< Base * const , Protected *, Protected>(); |
| assert_cannot_catch<const Base * const , Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * const , Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * const , Protected *, Protected>(); |
| assert_cannot_catch< Base * volatile, Protected *, Protected>(); |
| assert_cannot_catch<const Base * volatile, Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * volatile, Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * volatile, Protected *, Protected>(); |
| assert_cannot_catch< Base * const volatile, Protected *, Protected>(); |
| assert_cannot_catch<const Base * const volatile, Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * const volatile, Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * const volatile, Protected *, Protected>(); |
| } |
| |
| void f12() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 & |
| // cannot catch an exception of type: |
| // Private * |
| assert_cannot_catch< Base * &, Private *, Private>(); |
| assert_cannot_catch<const Base * &, Private *, Private>(); |
| assert_cannot_catch< volatile Base * &, Private *, Private>(); |
| assert_cannot_catch<const volatile Base * &, Private *, Private>(); |
| assert_cannot_catch< Base * const &, Private *, Private>(); |
| assert_cannot_catch<const Base * const &, Private *, Private>(); |
| assert_cannot_catch< volatile Base * const &, Private *, Private>(); |
| assert_cannot_catch<const volatile Base * const &, Private *, Private>(); |
| assert_cannot_catch< Base * volatile &, Private *, Private>(); |
| assert_cannot_catch<const Base * volatile &, Private *, Private>(); |
| assert_cannot_catch< volatile Base * volatile &, Private *, Private>(); |
| assert_cannot_catch<const volatile Base * volatile &, Private *, Private>(); |
| assert_cannot_catch< Base * const volatile &, Private *, Private>(); |
| assert_cannot_catch<const Base * const volatile &, Private *, Private>(); |
| assert_cannot_catch< volatile Base * const volatile &, Private *, Private>(); |
| assert_cannot_catch<const volatile Base * const volatile &, Private *, Private>(); |
| } |
| |
| void f13() |
| { |
| // Test that every combination of handler of type: |
| // cv1 Base * cv2 & |
| // cannot catch an exception of type: |
| // Protected * |
| assert_cannot_catch< Base * &, Protected *, Protected>(); |
| assert_cannot_catch<const Base * &, Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * &, Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * &, Protected *, Protected>(); |
| assert_cannot_catch< Base * const &, Protected *, Protected>(); |
| assert_cannot_catch<const Base * const &, Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * const &, Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * const &, Protected *, Protected>(); |
| assert_cannot_catch< Base * volatile &, Protected *, Protected>(); |
| assert_cannot_catch<const Base * volatile &, Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * volatile &, Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * volatile &, Protected *, Protected>(); |
| assert_cannot_catch< Base * const volatile &, Protected *, Protected>(); |
| assert_cannot_catch<const Base * const volatile &, Protected *, Protected>(); |
| assert_cannot_catch< volatile Base * const volatile &, Protected *, Protected>(); |
| assert_cannot_catch<const volatile Base * const volatile &, Protected *, Protected>(); |
| } |
| |
| int main(int, char**) |
| { |
| f1(); |
| f2(); |
| f3(); |
| f4(); |
| f5(); |
| f6(); |
| f7(); |
| f8(); |
| f9(); |
| f10(); |
| f11(); |
| f12(); |
| f13(); |
| |
| return 0; |
| } |
