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