From: Vedant Kumar <vsk@apple.com>
Date: Sat, 10 Jun 2017 18:07:24 +0000 (+0000)
Subject: Fix a ubsan failure introduced by r305092
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ce478a5667ffa36afe3c59ab39c6727d23266f18;p=llvm

Fix a ubsan failure introduced by r305092

lib/Object/WindowsResource.cpp:578:3: runtime error: store to
misaligned address 0x7fa09aedebbe for type 'unsigned int', which
requires 4 byte alignment
0x7fa09aedebbe: note: pointer points here
00 00 03 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00  00 00
            ^

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305149 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Object/WindowsResource.cpp b/lib/Object/WindowsResource.cpp
index 041659e7aa2..3a1ed9a907a 100644
--- a/lib/Object/WindowsResource.cpp
+++ b/lib/Object/WindowsResource.cpp
@@ -574,8 +574,8 @@ void WindowsResourceCOFFWriter::writeSymbolTable() {
 
 void WindowsResourceCOFFWriter::writeStringTable() {
   // Just 4 null bytes for the string table.
-  auto COFFStringTable = reinterpret_cast<uint32_t *>(Current);
-  *COFFStringTable = 0;
+  auto COFFStringTable = reinterpret_cast<void *>(Current);
+  memset(COFFStringTable, 0, 4);
 }
 
 void WindowsResourceCOFFWriter::writeDirectoryTree() {