From a33f23cbbcd68c0f534d874052311672d0dcaf5d Mon Sep 17 00:00:00 2001
From: Fedor Indutny <fedor@indutny.com>
Date: Wed, 11 Mar 2015 07:28:05 -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 v0.12 should do
this too for compatibility.

PR-URL: https://github.com/joyent/node/pull/9375
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
---
 lib/buffer.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/buffer.js b/lib/buffer.js
index dd6f7a37abe315..1a9f7caeb5aba9 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -86,6 +86,12 @@ function Buffer(subject, encoding) {
                             poolOffset,
                             poolOffset + this.length);
     poolOffset += this.length;
+
+    // Ensure aligned slices
+    if (poolOffset & 0x7) {
+      poolOffset |= 0x7;
+      poolOffset++;
+    }
   } else {
     alloc(this, this.length);
   }