Wed, 03 Jul 2019 20:42:37 +0800
Merge
aoqi@0 | 1 | /* |
coleenp@9530 | 2 | * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "classfile/symbolTable.hpp" |
iklam@8497 | 27 | #include "classfile/systemDictionaryShared.hpp" |
aoqi@0 | 28 | #include "classfile/verificationType.hpp" |
aoqi@0 | 29 | #include "classfile/verifier.hpp" |
aoqi@0 | 30 | |
aoqi@0 | 31 | VerificationType VerificationType::from_tag(u1 tag) { |
aoqi@0 | 32 | switch (tag) { |
aoqi@0 | 33 | case ITEM_Top: return bogus_type(); |
aoqi@0 | 34 | case ITEM_Integer: return integer_type(); |
aoqi@0 | 35 | case ITEM_Float: return float_type(); |
aoqi@0 | 36 | case ITEM_Double: return double_type(); |
aoqi@0 | 37 | case ITEM_Long: return long_type(); |
aoqi@0 | 38 | case ITEM_Null: return null_type(); |
aoqi@0 | 39 | default: |
aoqi@0 | 40 | ShouldNotReachHere(); |
aoqi@0 | 41 | return bogus_type(); |
aoqi@0 | 42 | } |
aoqi@0 | 43 | } |
aoqi@0 | 44 | |
aoqi@0 | 45 | bool VerificationType::is_reference_assignable_from( |
aoqi@0 | 46 | const VerificationType& from, ClassVerifier* context, |
aoqi@0 | 47 | bool from_field_is_protected, TRAPS) const { |
aoqi@0 | 48 | instanceKlassHandle klass = context->current_class(); |
aoqi@0 | 49 | if (from.is_null()) { |
aoqi@0 | 50 | // null is assignable to any reference |
aoqi@0 | 51 | return true; |
aoqi@0 | 52 | } else if (is_null()) { |
aoqi@0 | 53 | return false; |
aoqi@0 | 54 | } else if (name() == from.name()) { |
aoqi@0 | 55 | return true; |
aoqi@0 | 56 | } else if (is_object()) { |
aoqi@0 | 57 | // We need check the class hierarchy to check assignability |
aoqi@0 | 58 | if (name() == vmSymbols::java_lang_Object()) { |
aoqi@0 | 59 | // any object or array is assignable to java.lang.Object |
aoqi@0 | 60 | return true; |
aoqi@0 | 61 | } |
aoqi@0 | 62 | Klass* obj = SystemDictionary::resolve_or_fail( |
aoqi@0 | 63 | name(), Handle(THREAD, klass->class_loader()), |
aoqi@0 | 64 | Handle(THREAD, klass->protection_domain()), true, CHECK_false); |
aoqi@0 | 65 | KlassHandle this_class(THREAD, obj); |
aoqi@0 | 66 | |
aoqi@0 | 67 | if (this_class->is_interface() && (!from_field_is_protected || |
aoqi@0 | 68 | from.name() != vmSymbols::java_lang_Object())) { |
aoqi@0 | 69 | // If we are not trying to access a protected field or method in |
aoqi@0 | 70 | // java.lang.Object then we treat interfaces as java.lang.Object, |
aoqi@0 | 71 | // including java.lang.Cloneable and java.io.Serializable. |
aoqi@0 | 72 | return true; |
aoqi@0 | 73 | } else if (from.is_object()) { |
aoqi@0 | 74 | Klass* from_class = SystemDictionary::resolve_or_fail( |
aoqi@0 | 75 | from.name(), Handle(THREAD, klass->class_loader()), |
aoqi@0 | 76 | Handle(THREAD, klass->protection_domain()), true, CHECK_false); |
iklam@8497 | 77 | bool result = InstanceKlass::cast(from_class)->is_subclass_of(this_class()); |
iklam@8497 | 78 | if (result && DumpSharedSpaces) { |
iklam@8497 | 79 | if (klass()->is_subclass_of(from_class) && klass()->is_subclass_of(this_class())) { |
iklam@8497 | 80 | // No need to save verification dependency. At run time, <klass> will be |
iklam@8497 | 81 | // loaded from the archived only if <from_class> and <this_class> are |
iklam@8497 | 82 | // also loaded from the archive. I.e., all 3 classes are exactly the same |
iklam@8497 | 83 | // as we saw at archive creation time. |
iklam@8497 | 84 | } else { |
iklam@8497 | 85 | // Save the dependency. At run time, we need to check that the condition |
iklam@8497 | 86 | // from_class->is_subclass_of(this_class() is still true. |
iklam@8497 | 87 | Symbol* accessor_clsname = from.name(); |
iklam@8497 | 88 | Symbol* target_clsname = this_class()->name(); |
iklam@8497 | 89 | SystemDictionaryShared::add_verification_dependency(klass(), |
iklam@8497 | 90 | accessor_clsname, target_clsname); |
iklam@8497 | 91 | } |
iklam@8497 | 92 | } |
iklam@8497 | 93 | return result; |
aoqi@0 | 94 | } |
aoqi@0 | 95 | } else if (is_array() && from.is_array()) { |
aoqi@0 | 96 | VerificationType comp_this = get_component(context, CHECK_false); |
aoqi@0 | 97 | VerificationType comp_from = from.get_component(context, CHECK_false); |
aoqi@0 | 98 | if (!comp_this.is_bogus() && !comp_from.is_bogus()) { |
aoqi@0 | 99 | return comp_this.is_assignable_from(comp_from, context, |
phh@9515 | 100 | from_field_is_protected, THREAD); |
aoqi@0 | 101 | } |
aoqi@0 | 102 | } |
aoqi@0 | 103 | return false; |
aoqi@0 | 104 | } |
aoqi@0 | 105 | |
aoqi@0 | 106 | VerificationType VerificationType::get_component(ClassVerifier *context, TRAPS) const { |
aoqi@0 | 107 | assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array"); |
aoqi@0 | 108 | Symbol* component; |
aoqi@0 | 109 | switch (name()->byte_at(1)) { |
aoqi@0 | 110 | case 'Z': return VerificationType(Boolean); |
aoqi@0 | 111 | case 'B': return VerificationType(Byte); |
aoqi@0 | 112 | case 'C': return VerificationType(Char); |
aoqi@0 | 113 | case 'S': return VerificationType(Short); |
aoqi@0 | 114 | case 'I': return VerificationType(Integer); |
aoqi@0 | 115 | case 'J': return VerificationType(Long); |
aoqi@0 | 116 | case 'F': return VerificationType(Float); |
aoqi@0 | 117 | case 'D': return VerificationType(Double); |
aoqi@0 | 118 | case '[': |
aoqi@0 | 119 | component = context->create_temporary_symbol( |
aoqi@0 | 120 | name(), 1, name()->utf8_length(), |
aoqi@0 | 121 | CHECK_(VerificationType::bogus_type())); |
aoqi@0 | 122 | return VerificationType::reference_type(component); |
aoqi@0 | 123 | case 'L': |
aoqi@0 | 124 | component = context->create_temporary_symbol( |
aoqi@0 | 125 | name(), 2, name()->utf8_length() - 1, |
aoqi@0 | 126 | CHECK_(VerificationType::bogus_type())); |
aoqi@0 | 127 | return VerificationType::reference_type(component); |
aoqi@0 | 128 | default: |
aoqi@0 | 129 | // Met an invalid type signature, e.g. [X |
aoqi@0 | 130 | return VerificationType::bogus_type(); |
aoqi@0 | 131 | } |
aoqi@0 | 132 | } |
aoqi@0 | 133 | |
aoqi@0 | 134 | void VerificationType::print_on(outputStream* st) const { |
aoqi@0 | 135 | switch (_u._data) { |
aoqi@0 | 136 | case Bogus: st->print("top"); break; |
aoqi@0 | 137 | case Category1: st->print("category1"); break; |
aoqi@0 | 138 | case Category2: st->print("category2"); break; |
aoqi@0 | 139 | case Category2_2nd: st->print("category2_2nd"); break; |
aoqi@0 | 140 | case Boolean: st->print("boolean"); break; |
aoqi@0 | 141 | case Byte: st->print("byte"); break; |
aoqi@0 | 142 | case Short: st->print("short"); break; |
aoqi@0 | 143 | case Char: st->print("char"); break; |
aoqi@0 | 144 | case Integer: st->print("integer"); break; |
aoqi@0 | 145 | case Float: st->print("float"); break; |
aoqi@0 | 146 | case Long: st->print("long"); break; |
aoqi@0 | 147 | case Double: st->print("double"); break; |
aoqi@0 | 148 | case Long_2nd: st->print("long_2nd"); break; |
aoqi@0 | 149 | case Double_2nd: st->print("double_2nd"); break; |
aoqi@0 | 150 | case Null: st->print("null"); break; |
aoqi@0 | 151 | case ReferenceQuery: st->print("reference type"); break; |
aoqi@0 | 152 | case Category1Query: st->print("category1 type"); break; |
aoqi@0 | 153 | case Category2Query: st->print("category2 type"); break; |
aoqi@0 | 154 | case Category2_2ndQuery: st->print("category2_2nd type"); break; |
aoqi@0 | 155 | default: |
aoqi@0 | 156 | if (is_uninitialized_this()) { |
aoqi@0 | 157 | st->print("uninitializedThis"); |
aoqi@0 | 158 | } else if (is_uninitialized()) { |
aoqi@0 | 159 | st->print("uninitialized %d", bci()); |
aoqi@0 | 160 | } else { |
aoqi@0 | 161 | name()->print_value_on(st); |
aoqi@0 | 162 | } |
aoqi@0 | 163 | } |
aoqi@0 | 164 | } |