Index: compiler-rt/trunk/include/xray/xray_records.h
===================================================================
--- compiler-rt/trunk/include/xray/xray_records.h
+++ compiler-rt/trunk/include/xray/xray_records.h
@@ -96,7 +96,7 @@
   uint32_t TId = 0;
 
   // Use some bytes in the end of the record for buffers.
-  char Buffer[4] = {};
+  char Buffer[12] = {};
 } __attribute__((packed));
 
 static_assert(sizeof(XRayRecord) == 32, "XRayRecord != 32 bytes");