From 4b58f577cd33749dabd27b0811a495e426701613 Mon Sep 17 00:00:00 2001
From: Rui Ueyama <ruiu@google.com>
Date: Wed, 15 Feb 2017 01:48:33 +0000
Subject: Revert r295138: Instead of a series of string operations, use
 snprintf().

This broke buildbots.

llvm-svn: 295142
---
 llvm/lib/MC/WinCOFFObjectWriter.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/MC/WinCOFFObjectWriter.cpp')

diff --git a/llvm/lib/MC/WinCOFFObjectWriter.cpp b/llvm/lib/MC/WinCOFFObjectWriter.cpp
index 091693a483a..8ed5dd0c45e 100644
--- a/llvm/lib/MC/WinCOFFObjectWriter.cpp
+++ b/llvm/lib/MC/WinCOFFObjectWriter.cpp
@@ -434,8 +434,10 @@ void WinCOFFObjectWriter::SetSectionName(COFFSection &S) {
 
   uint64_t StringTableEntry = Strings.getOffset(S.Name);
   if (StringTableEntry <= Max7DecimalOffset) {
-    snprintf(S.Header.Name, sizeof(S.Header.Name), "/%" PRIu64,
-             StringTableEntry);
+    SmallVector<char, COFF::NameSize> Buffer;
+    Twine('/').concat(Twine(StringTableEntry)).toVector(Buffer);
+    assert(Buffer.size() <= COFF::NameSize && Buffer.size() >= 2);
+    std::memcpy(S.Header.Name, Buffer.data(), Buffer.size());
     return;
   }
   if (StringTableEntry <= MaxBase64Offset) {
-- 
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