1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // _Unwind_ForcedUnwind raised exception can be caught by catch (...) and be
10 // rethrown. If not rethrown, exception_cleanup will be called.
11
12 // UNSUPPORTED: no-exceptions, c++03
13
14 // These tests fail on previously released dylibs, investigation needed.
15 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
16 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
17
18 #include <stdlib.h>
19 #include <string.h>
20 #include <unwind.h>
21 #include <tuple>
22 #include <__cxxabi_config.h>
23
24 static int bits = 0;
25
26 struct C {
27 int bit;
CC28 C(int b) : bit(b) {}
~CC29 ~C() { bits |= bit; }
30 };
31
32 template <typename T>
33 struct Stop;
34
35 template <typename R, typename... Args>
36 struct Stop<R (*)(Args...)> {
37 // The third argument of _Unwind_Stop_Fn is uint64_t in Itanium C++ ABI/LLVM
38 // libunwind while _Unwind_Exception_Class in libgcc.
39 typedef typename std::tuple_element<2, std::tuple<Args...>>::type type;
40
stopStop41 static _Unwind_Reason_Code stop(int, _Unwind_Action actions, type,
42 struct _Unwind_Exception*,
43 struct _Unwind_Context*, void*) {
44 if (actions & _UA_END_OF_STACK)
45 abort();
46 return _URC_NO_REASON;
47 }
48 };
49
cleanup(_Unwind_Reason_Code,struct _Unwind_Exception * exc)50 static void cleanup(_Unwind_Reason_Code, struct _Unwind_Exception* exc) {
51 bits |= 8;
52 delete exc;
53 }
54
forced_unwind()55 static void forced_unwind() {
56 _Unwind_Exception* exc = new _Unwind_Exception;
57 memset(&exc->exception_class, 0, sizeof(exc->exception_class));
58 exc->exception_cleanup = cleanup;
59 _Unwind_ForcedUnwind(exc, Stop<_Unwind_Stop_Fn>::stop, 0);
60 abort();
61 }
62
test()63 static void test() {
64 try {
65 C four(4);
66 try {
67 C one(1);
68 forced_unwind();
69 } catch (...) {
70 bits |= 2;
71 throw;
72 }
73 } catch (int) {
74 } catch (...) {
75 // __cxa_end_catch calls cleanup.
76 }
77 }
78
main(int,char **)79 int main(int, char**) {
80 test();
81 return bits != 15;
82 }
83