From 7b98f0d2c3929b3d961480d9316e9073e9bcc218 Mon Sep 17 00:00:00 2001
From: Kevin DeJong <kevinmdejong@gmail.com>
Date: Sat, 10 Dec 2016 23:32:11 -0800
Subject: Ensure child stack passed to clone is 16 byte aligned.

---
 src/sched.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/sched.rs')

diff --git a/src/sched.rs b/src/sched.rs
index 4af33203..66b4ed4f 100644
--- a/src/sched.rs
+++ b/src/sched.rs
@@ -114,8 +114,9 @@ pub fn clone(mut cb: CloneCb,
     let res = unsafe {
         let combined = flags.bits() | signal.unwrap_or(0);
         let ptr = stack.as_mut_ptr().offset(stack.len() as isize);
+        let ptr_aligned = ptr.offset((ptr as usize % 16) as isize * -1);
         ffi::clone(mem::transmute(callback as extern "C" fn(*mut Box<::std::ops::FnMut() -> isize>) -> i32),
-                   ptr as *mut c_void,
+                   ptr_aligned as *mut c_void,
                    combined,
                    &mut cb)
     };
-- 
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