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comparison libcxxabi/test/exception_object_alignment.2.pass.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 0572611fdcc8
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147:c2174574ed3a 150:1d019706d866
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 // UNSUPPORTED: libcxxabi-no-exceptions
10
11 // This test checks that the compiler does not make incorrect assumptions
12 // about the alignment of the exception (only in that specific case, of
13 // course).
14 //
15 // There was a bug where Clang would emit a call to memset assuming a 16-byte
16 // aligned exception even when back-deploying to older Darwin systems where
17 // exceptions are 8-byte aligned, which caused a segfault on those systems.
18
19 struct exception {
20 exception() : x(0) { }
21 virtual ~exception() { }
22 int x;
23 };
24
25 struct foo : exception { };
26
27 int main() {
28 try {
29 throw foo();
30 } catch (...) {
31
32 }
33 return 0;
34 }