duke@435: /* duke@435: * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * duke@435: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, duke@435: * CA 95054 USA or visit www.sun.com if you need additional information or duke@435: * have any questions. duke@435: * duke@435: */ duke@435: duke@435: # include "incls/_precompiled.incl" duke@435: # include "incls/_verificationType.cpp.incl" duke@435: duke@435: VerificationType VerificationType::from_tag(u1 tag) { duke@435: switch (tag) { duke@435: case ITEM_Top: return bogus_type(); duke@435: case ITEM_Integer: return integer_type(); duke@435: case ITEM_Float: return float_type(); duke@435: case ITEM_Double: return double_type(); duke@435: case ITEM_Long: return long_type(); duke@435: case ITEM_Null: return null_type(); duke@435: default: duke@435: ShouldNotReachHere(); duke@435: return bogus_type(); duke@435: } duke@435: } duke@435: duke@435: bool VerificationType::is_reference_assignable_from( duke@435: const VerificationType& from, instanceKlassHandle context, TRAPS) const { duke@435: if (from.is_null()) { duke@435: // null is assignable to any reference duke@435: return true; duke@435: } else if (is_null()) { duke@435: return false; duke@435: } else if (name() == from.name()) { duke@435: return true; duke@435: } else if (is_object()) { duke@435: // We need check the class hierarchy to check assignability duke@435: if (name() == vmSymbols::java_lang_Object()) { duke@435: // any object or array is assignable to java.lang.Object duke@435: return true; duke@435: } duke@435: klassOop this_class = SystemDictionary::resolve_or_fail( duke@435: name_handle(), Handle(THREAD, context->class_loader()), duke@435: Handle(THREAD, context->protection_domain()), true, CHECK_false); duke@435: if (this_class->klass_part()->is_interface()) { duke@435: // We treat interfaces as java.lang.Object, including duke@435: // java.lang.Cloneable and java.io.Serializable duke@435: return true; duke@435: } else if (from.is_object()) { duke@435: klassOop from_class = SystemDictionary::resolve_or_fail( duke@435: from.name_handle(), Handle(THREAD, context->class_loader()), duke@435: Handle(THREAD, context->protection_domain()), true, CHECK_false); duke@435: return instanceKlass::cast(from_class)->is_subclass_of(this_class); duke@435: } duke@435: } else if (is_array() && from.is_array()) { duke@435: VerificationType comp_this = get_component(CHECK_false); duke@435: VerificationType comp_from = from.get_component(CHECK_false); duke@435: return comp_this.is_assignable_from(comp_from, context, CHECK_false); duke@435: } duke@435: return false; duke@435: } duke@435: duke@435: VerificationType VerificationType::get_component(TRAPS) const { duke@435: assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array"); duke@435: symbolOop component; duke@435: switch (name()->byte_at(1)) { duke@435: case 'Z': return VerificationType(Boolean); duke@435: case 'B': return VerificationType(Byte); duke@435: case 'C': return VerificationType(Char); duke@435: case 'S': return VerificationType(Short); duke@435: case 'I': return VerificationType(Integer); duke@435: case 'J': return VerificationType(Long); duke@435: case 'F': return VerificationType(Float); duke@435: case 'D': return VerificationType(Double); duke@435: case '[': duke@435: component = SymbolTable::lookup( duke@435: name(), 1, name()->utf8_length(), duke@435: CHECK_(VerificationType::bogus_type())); duke@435: return VerificationType::reference_type(component); duke@435: case 'L': duke@435: component = SymbolTable::lookup( duke@435: name(), 2, name()->utf8_length() - 1, duke@435: CHECK_(VerificationType::bogus_type())); duke@435: return VerificationType::reference_type(component); duke@435: default: duke@435: ShouldNotReachHere(); duke@435: return VerificationType::bogus_type(); duke@435: } duke@435: } duke@435: duke@435: #ifndef PRODUCT duke@435: duke@435: void VerificationType::print_on(outputStream* st) const { duke@435: switch (_u._data) { duke@435: case Bogus: st->print(" bogus "); break; duke@435: case Category1: st->print(" category1 "); break; duke@435: case Category2: st->print(" category2 "); break; duke@435: case Category2_2nd: st->print(" category2_2nd "); break; duke@435: case Boolean: st->print(" boolean "); break; duke@435: case Byte: st->print(" byte "); break; duke@435: case Short: st->print(" short "); break; duke@435: case Char: st->print(" char "); break; duke@435: case Integer: st->print(" integer "); break; duke@435: case Float: st->print(" float "); break; duke@435: case Long: st->print(" long "); break; duke@435: case Double: st->print(" double "); break; duke@435: case Long_2nd: st->print(" long_2nd "); break; duke@435: case Double_2nd: st->print(" double_2nd "); break; duke@435: case Null: st->print(" null "); break; duke@435: default: duke@435: if (is_uninitialized_this()) { duke@435: st->print(" uninitializedThis "); duke@435: } else if (is_uninitialized()) { duke@435: st->print(" uninitialized %d ", bci()); duke@435: } else { duke@435: st->print(" class %s ", name()->as_klass_external_name()); duke@435: } duke@435: } duke@435: } duke@435: duke@435: #endif