--- a/hotspot/src/share/vm/prims/methodHandles.cpp	Tue Jan 26 17:13:18 2016 +0100
+++ b/hotspot/src/share/vm/prims/methodHandles.cpp	Thu Jan 28 09:49:17 2016 +0100
@@ -202,6 +202,7 @@
     assert(m_klass->verify_itable_index(vmindex), "");
     flags |= IS_METHOD | (JVM_REF_invokeInterface << REFERENCE_KIND_SHIFT);
     if (TraceInvokeDynamic) {
+      ttyLocker ttyl;
       ResourceMark rm;
       tty->print_cr("memberName: invokeinterface method_holder::method: %s, itableindex: %d, access_flags:",
             Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()),
@@ -242,6 +243,7 @@
       m_klass = m_klass_non_interface;
     }
     if (TraceInvokeDynamic) {
+      ttyLocker ttyl;
       ResourceMark rm;
       tty->print_cr("memberName: invokevirtual method_holder::method: %s, receiver: %s, vtableindex: %d, access_flags:",
             Method::name_and_sig_as_C_string(m->method_holder(), m->name(), m->signature()),