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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - CFI tests using ThinLTO on Windows all fail with unsupported X86 relocation"
href="https://bugs.llvm.org/show_bug.cgi?id=32770">32770</a>
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<th>Summary</th>
<td>CFI tests using ThinLTO on Windows all fail with unsupported X86 relocation
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Linker
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>rnk@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>This was found after Evgeniy's refactoring of the CFI tests in r301016.
The failing tests:
Failing Tests (4):
cfi-devirt-lld-thinlto :: simple-pass.cpp
cfi-devirt-thinlto :: simple-pass.cpp
cfi-standalone-lld-thinlto :: simple-pass.cpp
cfi-standalone-thinlto :: simple-pass.cpp
Example build:
<a href="http://lab.llvm.org:8011/builders/sanitizer-windows/builds/10028/">http://lab.llvm.org:8011/builders/sanitizer-windows/builds/10028/</a>
LLD crashes when attempting to emit a COFF object after ThinLTO optimization:
$ "C:/b/slave/sanitizer-windows/build/./bin/clang.exe" "-fuse-ld=lld"
"-Wl,-nopdb" "-flto=thin" "-fsanitize=cfi" "-fvisibility=hidden" "-o"
"C:\b\slave\sanitizer-windows\build\projects\compiler-rt\test\cfi\Standalone-thinlto\Output\simple-pass.cpp.tmp"
"C:\b\slave\sanitizer-windows\llvm\projects\compiler-rt\test\cfi\simple-pass.cpp"
# command stderr:
unsupported relocation type
UNREACHABLE executed at
C:\b\slave\sanitizer-windows\llvm\lib\Target\X86\MCTargetDesc\X86WinCOFFObjectWriter.cpp:92!</pre>
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