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Differential D13466 Diff 36521 contrib/llvm/tools/lld/ELF/MarkLive.cpp

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contrib/llvm/tools/lld/ELF/MarkLive.cpp

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// identifiers, so we just store a std::vector instead of a multimap. // identifiers, so we just store a std::vector instead of a multimap.
static DenseMap<StringRef, std::vector<InputSectionBase *>> CNamedSections; static DenseMap<StringRef, std::vector<InputSectionBase *>> CNamedSections;
template <class ELFT, class RelT> template <class ELFT, class RelT>
static void resolveReloc(InputSectionBase &Sec, RelT &Rel, static void resolveReloc(InputSectionBase &Sec, RelT &Rel,
std::function<void(ResolvedReloc)> Fn) { std::function<void(ResolvedReloc)> Fn) {
SymbolBody &B = Sec.getFile<ELFT>()->getRelocTargetSym(Rel); SymbolBody &B = Sec.getFile<ELFT>()->getRelocTargetSym(Rel);
if (auto *D = dyn_cast<DefinedRegular>(&B)) { if (auto *D = dyn_cast<DefinedRegular>(&B)) {
if (!D->Section) auto *RelSec = dyn_cast_or_null<InputSectionBase>(D->Section);
if (!RelSec)
return; return;
typename ELFT::uint Offset = D->Value; typename ELFT::uint Offset = D->Value;
if (D->isSection()) if (D->isSection())
Offset += getAddend<ELFT>(Sec, Rel); Offset += getAddend<ELFT>(Sec, Rel);
Fn({cast<InputSectionBase>(D->Section), Offset}); Fn({RelSec, Offset});
} else if (auto *U = dyn_cast<Undefined>(&B)) { } else if (auto *U = dyn_cast<Undefined>(&B)) {
for (InputSectionBase *Sec : CNamedSections.lookup(U->getName())) for (InputSectionBase *Sec : CNamedSections.lookup(U->getName()))
Fn({Sec, 0}); Fn({Sec, 0});
} }
} }
// Calls Fn for each section that Sec refers to via relocations. // Calls Fn for each section that Sec refers to via relocations.
template <class ELFT> template <class ELFT>
▲ Show 20 Lines • Show All 125 Lines • ▼ Show 20 Lines auto Enqueue = [&](ResolvedReloc R) {
R.Sec->Live = true; R.Sec->Live = true;
// Add input section to the queue. // Add input section to the queue.
if (InputSection *S = dyn_cast<InputSection>(R.Sec)) if (InputSection *S = dyn_cast<InputSection>(R.Sec))
Q.push_back(S); Q.push_back(S);
}; };
auto MarkSymbol = [&](const SymbolBody *Sym) { auto MarkSymbol = [&](const SymbolBody *Sym) {
if (auto *D = dyn_cast_or_null<DefinedRegular>(Sym)) if (auto *D = dyn_cast_or_null<DefinedRegular>(Sym))
if (auto *IS = cast_or_null<InputSectionBase>(D->Section)) if (auto *IS = dyn_cast_or_null<InputSectionBase>(D->Section))
Enqueue({IS, D->Value}); Enqueue({IS, D->Value});
}; };
// Add GC root symbols. // Add GC root symbols.
MarkSymbol(Symtab<ELFT>::X->find(Config->Entry)); MarkSymbol(Symtab<ELFT>::X->find(Config->Entry));
MarkSymbol(Symtab<ELFT>::X->find(Config->Init)); MarkSymbol(Symtab<ELFT>::X->find(Config->Init));
MarkSymbol(Symtab<ELFT>::X->find(Config->Fini)); MarkSymbol(Symtab<ELFT>::X->find(Config->Fini));
for (StringRef S : Config->Undefined) for (StringRef S : Config->Undefined)
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