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//===----------------------------------------------------------------------===//
//
// 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 3.3:
//
// 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
// This test requires the fix to https://github.com/llvm/llvm-project/issues/64953,
// which landed in d5f84e6 and is in the libc++abi built library.
// XFAIL: using-built-library-before-llvm-18
#include <exception>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>
struct Base {
int b;
};
struct Base2 {
int b;
};
struct Derived1 : Base {
int b;
};
struct Derived2 : Base {
int b;
};
struct Derived3 : Base2 {
int b;
};
struct Private : private Base {
int b;
};
struct Protected : protected Base {
int b;
};
struct Virtual1 : virtual Base {
int b;
};
struct Virtual2 : virtual Base {
int b;
};
struct Ambiguous1 : Derived1, Derived2 {
int b;
};
struct Ambiguous2 : Derived1, Private {
int b;
};
struct Ambiguous3 : Derived1, Protected {
int b;
};
struct NoPublic1 : Private, Base2 {
int b;
};
struct NoPublic2 : Protected, Base2 {
int b;
};
struct Catchable1 : Derived3, Derived1 {
int b;
};
struct Catchable2 : Virtual1, Virtual2 {
int b;
};
struct Catchable3 : virtual Base, Virtual2 {
int b;
};
// Check that, when we have a null pointer-to-object that we catch a nullptr.
template <typename T // Handler type
,
typename E // Thrown exception type
>
void assert_catches() {
try {
throw static_cast<E>(0);
printf("%s\n", __PRETTY_FUNCTION__);
assert(false && "Statements after throw must be unreachable");
} catch (T t) {
assert(t == nullptr);
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
>
void assert_cannot_catch() {
try {
throw static_cast<E>(0);
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");
}
// Check that when we have a pointer-to-actual-object we, in fact, get the
// adjusted pointer to the base class.
template <typename T // Handler type
,
typename O // Object type
>
void assert_catches_bp() {
O* o = new (O);
try {
throw o;
printf("%s\n", __PRETTY_FUNCTION__);
assert(false && "Statements after throw must be unreachable");
} catch (T t) {
assert(t == static_cast<T>(o));
//__builtin_printf("o = %p t = %p\n", o, t);
delete o;
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");
}
void f1() {
assert_catches<Base*, Catchable1*>();
assert_catches<Base*, Catchable2*>();
assert_catches<Base*, Catchable3*>();
}
void f2() {
assert_cannot_catch<Base*, Ambiguous1*>();
assert_cannot_catch<Base*, Ambiguous2*>();
assert_cannot_catch<Base*, Ambiguous3*>();
assert_cannot_catch<Base*, NoPublic1*>();
assert_cannot_catch<Base*, NoPublic2*>();
}
void f3() {
assert_catches_bp<Base*, Catchable1>();
assert_catches_bp<Base*, Catchable2>();
assert_catches_bp<Base*, Catchable3>();
}
int main(int, char**) {
f1();
f2();
f3();
return 0;
}
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