--- old/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Mon Mar  9 09:40:59 2015
+++ new/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Mon Mar  9 09:40:58 2015
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -2581,6 +2581,7 @@
     __ lea(c_rarg1, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size));
 
     __ mov(c_rarg0, obj_reg);
+    __ mov(c_rarg2, r15_thread);
     __ mov(r12, rsp); // remember sp
     __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
     __ andptr(rsp, -16); // align stack as required by ABI
@@ -2590,6 +2591,7 @@
     __ movptr(rbx, Address(r15_thread, in_bytes(Thread::pending_exception_offset())));
     __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD);
 
+    // args are (oop obj, BasicLock* lock, JavaThread* thread)
     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C)));
     __ mov(rsp, r12); // restore sp
     __ reinit_heapbase();