--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/verificationType.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2003-2006 Sun Microsystems, Inc.  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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_verificationType.cpp.incl"
+
+VerificationType VerificationType::from_tag(u1 tag) {
+  switch (tag) {
+    case ITEM_Top:     return bogus_type();
+    case ITEM_Integer: return integer_type();
+    case ITEM_Float:   return float_type();
+    case ITEM_Double:  return double_type();
+    case ITEM_Long:    return long_type();
+    case ITEM_Null:    return null_type();
+    default:
+      ShouldNotReachHere();
+      return bogus_type();
+  }
+}
+
+bool VerificationType::is_reference_assignable_from(
+    const VerificationType& from, instanceKlassHandle context, TRAPS) const {
+  if (from.is_null()) {
+    // null is assignable to any reference
+    return true;
+  } else if (is_null()) {
+    return false;
+  } else if (name() == from.name()) {
+    return true;
+  } else if (is_object()) {
+    // We need check the class hierarchy to check assignability
+    if (name() == vmSymbols::java_lang_Object()) {
+      // any object or array is assignable to java.lang.Object
+      return true;
+    }
+    klassOop this_class = SystemDictionary::resolve_or_fail(
+        name_handle(), Handle(THREAD, context->class_loader()),
+        Handle(THREAD, context->protection_domain()), true, CHECK_false);
+    if (this_class->klass_part()->is_interface()) {
+      // We treat interfaces as java.lang.Object, including
+      // java.lang.Cloneable and java.io.Serializable
+      return true;
+    } else if (from.is_object()) {
+      klassOop from_class = SystemDictionary::resolve_or_fail(
+          from.name_handle(), Handle(THREAD, context->class_loader()),
+          Handle(THREAD, context->protection_domain()), true, CHECK_false);
+      return instanceKlass::cast(from_class)->is_subclass_of(this_class);
+    }
+  } else if (is_array() && from.is_array()) {
+    VerificationType comp_this = get_component(CHECK_false);
+    VerificationType comp_from = from.get_component(CHECK_false);
+    return comp_this.is_assignable_from(comp_from, context, CHECK_false);
+  }
+  return false;
+}
+
+VerificationType VerificationType::get_component(TRAPS) const {
+  assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array");
+  symbolOop component;
+  switch (name()->byte_at(1)) {
+    case 'Z': return VerificationType(Boolean);
+    case 'B': return VerificationType(Byte);
+    case 'C': return VerificationType(Char);
+    case 'S': return VerificationType(Short);
+    case 'I': return VerificationType(Integer);
+    case 'J': return VerificationType(Long);
+    case 'F': return VerificationType(Float);
+    case 'D': return VerificationType(Double);
+    case '[':
+      component = SymbolTable::lookup(
+        name(), 1, name()->utf8_length(),
+        CHECK_(VerificationType::bogus_type()));
+      return VerificationType::reference_type(component);
+    case 'L':
+      component = SymbolTable::lookup(
+        name(), 2, name()->utf8_length() - 1,
+        CHECK_(VerificationType::bogus_type()));
+      return VerificationType::reference_type(component);
+    default:
+      ShouldNotReachHere();
+      return VerificationType::bogus_type();
+  }
+}
+
+#ifndef PRODUCT
+
+void VerificationType::print_on(outputStream* st) const {
+  switch (_u._data) {
+    case Bogus:            st->print(" bogus "); break;
+    case Category1:        st->print(" category1 "); break;
+    case Category2:        st->print(" category2 "); break;
+    case Category2_2nd:    st->print(" category2_2nd "); break;
+    case Boolean:          st->print(" boolean "); break;
+    case Byte:             st->print(" byte "); break;
+    case Short:            st->print(" short "); break;
+    case Char:             st->print(" char "); break;
+    case Integer:          st->print(" integer "); break;
+    case Float:            st->print(" float "); break;
+    case Long:             st->print(" long "); break;
+    case Double:           st->print(" double "); break;
+    case Long_2nd:         st->print(" long_2nd "); break;
+    case Double_2nd:       st->print(" double_2nd "); break;
+    case Null:             st->print(" null "); break;
+    default:
+      if (is_uninitialized_this()) {
+        st->print(" uninitializedThis ");
+      } else if (is_uninitialized()) {
+        st->print(" uninitialized %d ", bci());
+      } else {
+        st->print(" class %s ", name()->as_klass_external_name());
+      }
+  }
+}
+
+#endif