From 9c5ff6b248e7c81e5951f7a9e5f37e4d90df2234 Mon Sep 17 00:00:00 2001
From: Scott Mansell <phiren@gmail.com>
Date: Mon, 3 Aug 2026 02:03:40 +1200
Subject: [PATCH] Mach exception thread: Fix msg alignment

msg_in and msg_out were ending up with only 4-byte alignment, which
is undefined behaviour, since they contain 64-bit fields. Probably
doesn't cause any issues, but it showed up in ubsan.
---
 Source/Core/Core/MemTools.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Source/Core/Core/MemTools.cpp b/Source/Core/Core/MemTools.cpp
index f66aca2e0e..a7919fbef2 100644
--- a/Source/Core/Core/MemTools.cpp
+++ b/Source/Core/Core/MemTools.cpp
@@ -134,7 +134,7 @@ static void ExceptionThread(mach_port_t port)
 {
   Common::SetCurrentThreadName("Mach exception thread");
 #pragma pack(4)
-  struct
+  struct alignas(8)
   {
     mach_msg_header_t Head;
     NDR_record_t NDR;
@@ -147,7 +147,7 @@ static void ExceptionThread(mach_port_t port)
     mach_msg_trailer_t trailer;
   } msg_in;
 
-  struct
+  struct alignas(8)
   {
     mach_msg_header_t Head;
     NDR_record_t NDR;