From: Ludovic Henry <ludovic@xamarin.com>
Date: Tue, 16 May 2017 02:19:34 +0000 (-0400)
Subject: [threadpool] Fix alignment of ThreadPoolWorkerCounter (#4871)
X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=mono.git;a=commitdiff_plain;h=c74f8a0ea534b02fe693862a5c7201100266af0b

[threadpool] Fix alignment of ThreadPoolWorkerCounter (#4871)

It is accessed with a 64bits atomic operation, so it needs to be 64bits aligned, even on a 32bits platform. A CPU exception EXC_ARM_DA_ALIGN triggers on armv7 32bits.

Fix https://bugzilla.xamarin.com/show_bug.cgi?id=56202
---

diff --git a/mono/metadata/threadpool-worker-default.c b/mono/metadata/threadpool-worker-default.c
index cfcecf95a85..6c851db7370 100644
--- a/mono/metadata/threadpool-worker-default.c
+++ b/mono/metadata/threadpool-worker-default.c
@@ -118,7 +118,11 @@ typedef union {
 		gint16 parked; /* parked */
 	} _;
 	gint64 as_gint64;
-} ThreadPoolWorkerCounter;
+} ThreadPoolWorkerCounter
+#ifdef __GNUC__
+__attribute__((aligned(64)))
+#endif
+;
 
 typedef struct {
 	MonoRefCount ref;