Index: lib/Transforms/Instrumentation/AddressSanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -1072,6 +1072,10 @@
       DEBUG(dbgs() << "Ignoring objc_methname cstring global: " << *G << "\n");
       return false;
     }
+    if (Section.startswith("__TEXT,__objc_classname,cstring_literals")) {
+      DEBUG(dbgs() << "Ignoring objc_classname cstring global: " << *G << "\n");
+      return false;
+    }
 
 
     // Callbacks put into the CRT initializer/terminator sections
Index: projects/compiler-rt/test/asan/TestCases/Darwin/objc-odr.mm
===================================================================
--- projects/compiler-rt/test/asan/TestCases/Darwin/objc-odr.mm
+++ projects/compiler-rt/test/asan/TestCases/Darwin/objc-odr.mm
@@ -0,0 +1,23 @@
+// Regression test for
+// https://code.google.com/p/address-sanitizer/issues/detail?id=360.
+
+// RUN: %clang_asan %s -o %t -framework Foundation
+// RUN: %run %t 2>&1 | FileCheck %s
+
+#import <Foundation/Foundation.h>
+
+void f() {
+    int y = 7;
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
+        dispatch_sync(dispatch_get_main_queue(), ^{
+            printf("num = %d\n", y);
+        });
+    });
+}
+
+int main() {
+  NSLog(@"Hello world");
+}
+
+// CHECK-NOT: AddressSanitizer: odr-violation
+// CHECK: Hello world