author | kamg |
Mon, 20 Sep 2010 15:38:04 -0400 | |
changeset 6473 | 04e6d80f38b1 |
parent 6172 | e1d9c632fa3c |
child 7397 | 5b173b4ca846 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2006, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* 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 obj = 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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KlassHandle this_class(THREAD, obj); |
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if (this_class->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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if (!comp_this.is_bogus() && !comp_from.is_bogus()) { |
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return comp_this.is_assignable_from(comp_from, context, CHECK_false); |
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} |
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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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// Met an invalid type signature, e.g. [X |
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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 |