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lib/Object/ELFObjectFile.cpp: Fix undefined behavior for MC/ELF/many-section.s not to fail (on msvc).

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DenseMap::lookup(k) would return "default constructor value" when k was not met. It would be useless when value type were POD.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141774 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
NAKAMURA Takumi 2011-10-12 10:28:55 +00:00
parent a2e87912d8
commit 18dcb87f6b
1 changed files with 4 additions and 1 deletions
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lib/Object/ELFObjectFile.cpp
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@ -444,8 +444,11 @@ template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
ELFObjectFile<target_endianness, is64Bits>
::getSection(const Elf_Sym *symb) const {
if (symb->st_shndx == ELF::SHN_XINDEX)
if (symb->st_shndx == ELF::SHN_XINDEX) {
if (!ExtendedSymbolTable.count(symb))
return 0;
return getSection(ExtendedSymbolTable.lookup(symb));
}
if (symb->st_shndx >= ELF::SHN_LORESERVE)
return 0;
return getSection(symb->st_shndx);