From 5f2c46d62e49aa6950639b35c8af2b005e91aa45 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Wed, 23 Dec 2015 01:06:39 +0000
Subject: [PATCH] Fix two asan found bugs:

We were leaking InputFile subclasses data.
UndefinedElf was missing a classof.

llvm-svn: 256309
---
 lld/ELF/InputFiles.cpp | 2 ++
 lld/ELF/InputFiles.h   | 1 +
 lld/ELF/Symbols.h      | 4 ++++
 3 files changed, 7 insertions(+)

diff --git a/lld/ELF/InputFiles.cpp b/lld/ELF/InputFiles.cpp
index 62d9e671ef83..909f69ee2bc2 100644
--- a/lld/ELF/InputFiles.cpp
+++ b/lld/ELF/InputFiles.cpp
@@ -31,6 +31,8 @@ public:
 };
 }
 
+InputFile::~InputFile() {}
+
 template <class ELFT>
 ELFFileBase<ELFT>::ELFFileBase(Kind K, MemoryBufferRef M)
     : InputFile(K, M), ELFObj(MB.getBuffer(), ECRAII().getEC()) {}
diff --git a/lld/ELF/InputFiles.h b/lld/ELF/InputFiles.h
index 95c8f0f5128b..ba7d51ba00b0 100644
--- a/lld/ELF/InputFiles.h
+++ b/lld/ELF/InputFiles.h
@@ -35,6 +35,7 @@ class InputFile {
 public:
   enum Kind { ObjectKind, SharedKind, ArchiveKind };
   Kind kind() const { return FileKind; }
+  virtual ~InputFile();
 
   StringRef getName() const { return MB.getBufferIdentifier(); }
 
diff --git a/lld/ELF/Symbols.h b/lld/ELF/Symbols.h
index b60e4a29f631..88991924a698 100644
--- a/lld/ELF/Symbols.h
+++ b/lld/ELF/Symbols.h
@@ -270,6 +270,10 @@ template <class ELFT> class UndefinedElf : public Undefined {
 public:
   UndefinedElf(StringRef N, const Elf_Sym &Sym);
   const Elf_Sym &Sym;
+
+  static bool classof(const SymbolBody *S) {
+    return S->kind() == SymbolBody::UndefinedElfKind;
+  }
 };
 
 template <class ELFT> class SharedSymbol : public Defined<ELFT> {