504bc07d1a
This is needed when running the tests in Freestanding mode, where main() isn't treated specially. In Freestanding, main() doesn't get mangled as extern "C", so whatever runtime we're using fails to find the entry point. One way to solve this problem is to define a symbol alias from __Z4mainiPPc to _main, however this requires all definitions of main() to have the same mangling. Hence this commit.
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
//===--------------------- catch_pointer_nullptr.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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// UNSUPPORTED: c++03,
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// UNSUPPORTED: no-exceptions
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#include <cassert>
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#include <cstdlib>
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struct A {};
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template<typename T, bool CanCatchNullptr>
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static void catch_nullptr_test() {
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try {
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throw nullptr;
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} catch (T &p) {
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assert(CanCatchNullptr && !static_cast<bool>(p));
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} catch (...) {
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assert(!CanCatchNullptr);
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}
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}
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int main(int, char**)
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{
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using nullptr_t = decltype(nullptr);
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// A reference to nullptr_t can catch nullptr.
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catch_nullptr_test<nullptr_t, true>();
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catch_nullptr_test<const nullptr_t, true>();
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catch_nullptr_test<volatile nullptr_t, true>();
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catch_nullptr_test<const volatile nullptr_t, true>();
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// No other reference type can.
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#if 0
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// FIXME: These tests fail, because the ABI provides no way for us to
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// distinguish this from catching by value.
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catch_nullptr_test<void *, false>();
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catch_nullptr_test<void * const, false>();
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catch_nullptr_test<int *, false>();
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catch_nullptr_test<A *, false>();
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catch_nullptr_test<int A::*, false>();
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catch_nullptr_test<int (A::*)(), false>();
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#endif
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return 0;
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}
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