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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
//
//===----------------------------------------------------------------------===//
// Let's run ForcedUnwind until it reaches end of the stack, this test simulates
// what pthread_cancel does.
// UNSUPPORTED: c++03
// UNSUPPORTED: 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, _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
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