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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Regression Sep 16 2020] Build fails, if NT_X86_XSTATE is not defined, in sanitizer_common/tests/sanitizer_stoptheworld_linux_libcdep.cpp"
href="https://bugs.llvm.org/show_bug.cgi?id=47896">47896</a>
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<th>Summary</th>
<td>[Regression Sep 16 2020] Build fails, if NT_X86_XSTATE is not defined, in sanitizer_common/tests/sanitizer_stoptheworld_linux_libcdep.cpp
</td>
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<th>Product</th>
<td>compiler-rt
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Keywords</th>
<td>build-problem, portability
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>compiler-rt
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>burnus@net-b.de
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, vitalybuka@google.com
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<pre>Regression caused by <a href="https://reviews.llvm.org/D87754">https://reviews.llvm.org/D87754</a>
[Lsan] Use fp registers to search for pointers
<a href="https://github.com/llvm/llvm-project/commit/5813fca1076089c835de737834955a0fe7eb3898">https://github.com/llvm/llvm-project/commit/5813fca1076089c835de737834955a0fe7eb3898</a>
Using an older GLIBC 2.11.1 as cross-build symroot causes the fail:
sanitizer_common/tests/sanitizer_stoptheworld_linux_libcdep.cpp:490:39:
error: 'NT_X86_XSTATE' was not declared in this scope
as elf.h does not yet include NT_X86_XSTATE
Possible patch:
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
@@ -490 +490,5 @@ typedef user_regs_struct regs_struct;
-static constexpr uptr kExtraRegs[] = {NT_X86_XSTATE, NT_FPREGSET};
+static constexpr uptr kExtraRegs[] = {
+#ifdef NT_X86_XSTATE
+ NT_X86_XSTATE,
+#endif
+ NT_FPREGSET};</pre>
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