https://llvm.org/bugs/show_bug.cgi?id=27228
Bug ID: 27228
Summary: lld assertion failure linking FreeBSD base system
after r265293
Product: lld
Version: unspecified
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedb...@nondot.org
Reporter: ema...@freebsd.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
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;
}
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