From: alexrp <xtzgzorex@gmail.com>
Date: Mon, 9 Jul 2012 23:14:53 +0000 (+0200)
Subject: Use a critical region in mono_gc_alloc_array.
X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=commitdiff_plain;h=96b0bddf7165ddb03f8f0a267d39cb60ad55f637;p=mono.git

Use a critical region in mono_gc_alloc_array.
---

diff --git a/mono/metadata/sgen-alloc.c b/mono/metadata/sgen-alloc.c
index 7896c31292a..86095e5d042 100644
--- a/mono/metadata/sgen-alloc.c
+++ b/mono/metadata/sgen-alloc.c
@@ -474,6 +474,22 @@ mono_gc_alloc_array (MonoVTable *vtable, size_t size, uintptr_t max_length, uint
 	MonoArray *arr;
 	MonoArrayBounds *bounds;
 
+#ifndef DISABLE_CRITICAL_REGION
+	TLAB_ACCESS_INIT;
+	ENTER_CRITICAL_REGION;
+	arr = mono_gc_try_alloc_obj_nolock (vtable, size);
+	if (arr) {
+		/*This doesn't require fencing since EXIT_CRITICAL_REGION already does it for us*/
+		arr->max_length = max_length;
+
+		bounds = (MonoArrayBounds*)((char*)arr + size - bounds_size);
+		arr->bounds = bounds;
+		EXIT_CRITICAL_REGION;
+		return arr;
+	}
+	EXIT_CRITICAL_REGION;
+#endif
+
 	LOCK_GC;
 
 	arr = mono_gc_alloc_obj_nolock (vtable, size);