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