| /* |
| * 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 |