From 9bfcf776385b343b0743e5c528032df6c614f158 Mon Sep 17 00:00:00 2001
From: NAKAMURA Takumi <geek4civic@gmail.com>
Date: Wed, 12 Oct 2011 10:28:55 +0000
Subject: lib/Object/ELFObjectFile.cpp: Fix undefined behavior for
 MC/ELF/many-section.s not to fail (on msvc).

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

llvm-svn: 141774
---
 llvm/lib/Object/ELFObjectFile.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'llvm/lib/Object/ELFObjectFile.cpp')

diff --git a/llvm/lib/Object/ELFObjectFile.cpp b/llvm/lib/Object/ELFObjectFile.cpp
index a580dd0..7add2d8 100644
--- a/llvm/lib/Object/ELFObjectFile.cpp
+++ b/llvm/lib/Object/ELFObjectFile.cpp
@@ -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);
-- 
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