1.1 --- a/src/share/vm/oops/klassVtable.cpp Thu Mar 19 09:13:24 2009 -0700
1.2 +++ b/src/share/vm/oops/klassVtable.cpp Fri Mar 20 23:19:36 2009 -0700
1.3 @@ -1,5 +1,5 @@
1.4 /*
1.5 - * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
1.7 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 *
1.9 * This code is free software; you can redistribute it and/or modify it
1.10 @@ -1153,6 +1153,27 @@
1.11 return index;
1.12 }
1.13
1.14 +
1.15 +// inverse to compute_itable_index
1.16 +methodOop klassItable::method_for_itable_index(klassOop intf, int itable_index) {
1.17 + assert(instanceKlass::cast(intf)->is_interface(), "sanity check");
1.18 + objArrayOop methods = instanceKlass::cast(intf)->methods();
1.19 +
1.20 + int index = itable_index;
1.21 + // Adjust for <clinit>, which is left out of table if first method
1.22 + if (methods->length() > 0 && ((methodOop)methods->obj_at(0))->name() == vmSymbols::class_initializer_name()) {
1.23 + index++;
1.24 + }
1.25 +
1.26 + if (itable_index < 0 || index >= methods->length())
1.27 + return NULL; // help caller defend against bad indexes
1.28 +
1.29 + methodOop m = (methodOop)methods->obj_at(index);
1.30 + assert(compute_itable_index(m) == itable_index, "correct inverse");
1.31 +
1.32 + return m;
1.33 +}
1.34 +
1.35 void klassVtable::verify(outputStream* st, bool forced) {
1.36 // make sure table is initialized
1.37 if (!Universe::is_fully_initialized()) return;
