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221
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1 //===----------------------------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 // _Unwind_ForcedUnwind raised exception can be caught by catch (...) and be
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10 // rethrown. If not rethrown, exception_cleanup will be called.
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11
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12 // UNSUPPORTED: no-exceptions, c++03
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13
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14 // These tests fail on previously released dylibs, investigation needed.
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252
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15 // XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
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16 // XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx{{11.0|12.0}}
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221
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17
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18 #include <stdlib.h>
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19 #include <string.h>
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20 #include <unwind.h>
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21 #include <tuple>
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22 #include <__cxxabi_config.h>
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23
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24 static int bits = 0;
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25
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26 struct C {
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27 int bit;
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28 C(int b) : bit(b) {}
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29 ~C() { bits |= bit; }
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30 };
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31
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32 template <typename T>
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33 struct Stop;
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34
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35 template <typename R, typename... Args>
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36 struct Stop<R (*)(Args...)> {
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37 // The third argument of _Unwind_Stop_Fn is uint64_t in Itanium C++ ABI/LLVM
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38 // libunwind while _Unwind_Exception_Class in libgcc.
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39 typedef typename std::tuple_element<2, std::tuple<Args...>>::type type;
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40
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41 static _Unwind_Reason_Code stop(int, _Unwind_Action actions, type,
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42 struct _Unwind_Exception*,
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43 struct _Unwind_Context*, void*) {
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44 if (actions & _UA_END_OF_STACK)
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45 abort();
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46 return _URC_NO_REASON;
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47 }
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48 };
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49
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50 static void cleanup(_Unwind_Reason_Code, struct _Unwind_Exception* exc) {
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51 bits |= 8;
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52 delete exc;
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53 }
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54
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55 static void forced_unwind() {
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56 _Unwind_Exception* exc = new _Unwind_Exception;
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236
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57 memset(&exc->exception_class, 0, sizeof(exc->exception_class));
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221
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58 exc->exception_cleanup = cleanup;
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59 _Unwind_ForcedUnwind(exc, Stop<_Unwind_Stop_Fn>::stop, 0);
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60 abort();
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61 }
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62
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63 static void test() {
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64 try {
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65 C four(4);
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66 try {
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67 C one(1);
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68 forced_unwind();
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69 } catch (...) {
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70 bits |= 2;
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71 throw;
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72 }
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73 } catch (int) {
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74 } catch (...) {
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75 // __cxa_end_catch calls cleanup.
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76 }
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77 }
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78
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79 int main(int, char**) {
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80 test();
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81 return bits != 15;
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82 }
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