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<body><span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Windows x64 SEH __except filter continuing to __finally gets UD2"
href="https://llvm.org/bugs/show_bug.cgi?id=30747">bug 30747</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>rnk@google.com
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Windows x64 SEH __except filter continuing to __finally gets UD2"
href="https://llvm.org/bugs/show_bug.cgi?id=30747#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Windows x64 SEH __except filter continuing to __finally gets UD2"
href="https://llvm.org/bugs/show_bug.cgi?id=30747">bug 30747</a>
from <span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span></b>
<pre>This doesn't reproduce for me locally with a recent version of clang.
Here's your annotated disassembly:
?dtor$3@?0?f@4HA: This is a filter function with zero
handlercont, i.e. a clean-up.
0040: mov qword ptr [rsp+10h],rdx save rdx
0045: push rbp
0046: sub rsp,20h
004A: lea rbp,[rdx+30h]
004E: ud2 ??? ???
Assembly produced by clang locally:
"?dtor$3@?0??f@@YAHXZ@4HA":
movq %rdx, 16(%rsp)
pushq %rbp
subq $32, %rsp
leaq 48(%rdx), %rbp
incl ".L?f@@YAHXZ$frame_escape_0"(%rbp)
addq $32, %rsp
popq %rbp
retq # CLEANUPRET
I think this has been fixed some time between 3.8 and now.
A ud2 instruction usually indicates that reaching it would be an error,
something like falling off the end of a function without returning or calling a
function with the wrong calling convention. I'm not sure why 3.8 had this
problem, but it doesn't seem present today. Please reopen if you still have
issues with 3.9 or 4.0.</pre>
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