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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - lld assertion failure linking FreeBSD base system after r265293"
href="https://llvm.org/bugs/show_bug.cgi?id=27228">27228</a>
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<tr>
<th>Summary</th>
<td>lld assertion failure linking FreeBSD base system after r265293
</td>
</tr>
<tr>
<th>Product</th>
<td>lld
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>FreeBSD
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>All Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>emaste@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This assertion fails:
(lldb) frame sel 4
frame #4: 0x00000000005b1a74 ld`SymbolBody(this=0x00000008068ea140,
K=SharedKind, Name=StringRef at 0x00007fffffffc798, Binding='\0',
StOther='\0', Type='\0') + 276 at Symbols.h:134
131 : SymbolKind(K), MustBeInDynSym(false),
NeedsCopyOrPltAddr(false),
132 Type(Type), Binding(Binding), StOther(StOther),
133 Name({Name.data(), Name.size()}) {
-> 134 assert(!isLocal());
135 IsUsedInRegularObj =
136 K != SharedKind && K != LazyKind && K != DefinedBitcodeKind;
137 }
The failing symbol is:
(lldb) p Name
(lld::elf::SymbolBody::Str) $1 = (S = "__start_set_kvm_arch", Len = 20)
This is a synthetic symbol generated for section start and stop (for use by
e.g. linker sets), for the "set_kvm_arch" section in a .so that we're linking
against.
It looks like the issue is getSymbolBinding returns only STB_LOCAL for
synthetic symbols:
template <class ELFT>
uint8_t SymbolTableSection<ELFT>::getSymbolBinding(SymbolBody *Body) {
uint8_t Visibility = Body->getVisibility();
if (Visibility != STV_DEFAULT && Visibility != STV_PROTECTED)
return STB_LOCAL;
if (isa<DefinedSynthetic<ELFT>>(Body))
return STB_LOCAL;
return Body->Binding;
}</pre>
</div>
</p>
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