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