From 07c066724ced98adcae3f9f97cfcd301b138eb18 Mon Sep 17 00:00:00 2001
From: Fedor Indutny <fedor@indutny.com>
Date: Wed, 11 Mar 2015 07:17:53 -0700
Subject: [PATCH] buffer: align chunks on 8-byte boundary

When slicing global pool - ensure that the underlying buffer's data ptr
is 8-byte alignment to do not ruin expectations of 3rd party C++ addons.

NOTE: 0.10 node.js always returned aligned pointers and io.js should do
this too for compatibility.

PR-URL: https://github.com/iojs/io.js/pull/1126
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-by: Bert Belder <bertbelder@gmail.com>
---
 lib/buffer.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/buffer.js b/lib/buffer.js
index dde229a2ea9..f125806622d 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -157,6 +157,12 @@ function palloc(that, length) {
   var buf = sliceOnto(allocPool, that, start, end);
   poolOffset = end;
 
+  // Ensure aligned slices
+  if (poolOffset & 0x7) {
+    poolOffset |= 0x7;
+    poolOffset++;
+  }
+
   return buf;
 }