forked from OSchip/llvm-project
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
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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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// Let's run ForcedUnwind until it reaches end of the stack, this test simulates
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// what pthread_cancel does.
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// UNSUPPORTED: c++03
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// UNSUPPORTED: libcxxabi-no-threads
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// UNSUPPORTED: no-exceptions
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#include <assert.h>
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#include <exception>
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#include <stdlib.h>
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#include <string.h>
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#include <unwind.h>
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#include <thread>
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#include <tuple>
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#include <__cxxabi_config.h>
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// TODO: dump version back to 14 once clang is updated on the CI.
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#if defined(_LIBCXXABI_ARM_EHABI) && defined(__clang__) && __clang_major__ < 15
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// _Unwind_ForcedUnwind is not available or broken before version 14.
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int main(int, char**) { return 0; }
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#else
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static bool destructorCalled = false;
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struct myClass {
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myClass() {}
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~myClass() {
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assert(destructorCalled == false);
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destructorCalled = true;
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};
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};
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template <typename T>
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struct Stop;
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template <typename R, typename... Args>
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struct Stop<R (*)(Args...)> {
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// The third argument of _Unwind_Stop_Fn is uint64_t in Itanium C++ ABI/LLVM
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// libunwind while _Unwind_Exception_Class in libgcc.
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typedef typename std::tuple_element<2, std::tuple<Args...>>::type type;
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static _Unwind_Reason_Code stop(int, _Unwind_Action actions, type, struct _Unwind_Exception*, struct _Unwind_Context*,
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void*) {
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if (actions & _UA_END_OF_STACK) {
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assert(destructorCalled == true);
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exit(0);
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}
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return _URC_NO_REASON;
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}
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};
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static void forced_unwind() {
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_Unwind_Exception* exc = new _Unwind_Exception;
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memset(&exc->exception_class, 0, sizeof(exc->exception_class));
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exc->exception_cleanup = 0;
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_Unwind_ForcedUnwind(exc, Stop<_Unwind_Stop_Fn>::stop, 0);
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abort();
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}
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__attribute__((__noinline__)) static void test() {
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myClass c{};
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forced_unwind();
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abort();
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}
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int main(int, char**) {
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std::thread t{test};
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t.join();
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return -1;
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}
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#endif
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