From: Evgeniy Stepanov <eugeni.stepanov@gmail.com>
Date: Thu, 14 Feb 2013 12:18:32 +0000 (+0000)
Subject: Workaround an MSan false positive.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=79e8429e41c98d42e9e4d13de8276b8de24ddc83;p=oota-llvm.git

Workaround an MSan false positive.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175156 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/Unix/Process.inc b/lib/Support/Unix/Process.inc
index 1335b78e86b..9a4454f1c65 100644
--- a/lib/Support/Unix/Process.inc
+++ b/lib/Support/Unix/Process.inc
@@ -224,6 +224,8 @@ static unsigned getColumns(int FileID) {
 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_TERMIOS_H)
   // Try to determine the width of the terminal.
   struct winsize ws;
+  // Zero-fill ws to avoid a false positive from MemorySanitizer.
+  memset(&ws, 0, sizeof(ws));
   if (ioctl(FileID, TIOCGWINSZ, &ws) == 0)
     Columns = ws.ws_col;
 #endif