Mercurial > hg > graal-jvmci-8
annotate src/share/vm/classfile/verificationType.cpp @ 24225:a2dbb6fcc923
Added tag jvmci-0.33 for changeset 3aed4cb813f4
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Fri, 18 Aug 2017 22:47:33 +0200 |
| parents | 50e62b688ddc |
| children |
| rev | line source |
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| 0 | 1 /* |
| 23893 | 2 * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/symbolTable.hpp" | |
| 23893 | 27 #include "classfile/systemDictionaryShared.hpp" |
| 1972 | 28 #include "classfile/verificationType.hpp" |
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29 #include "classfile/verifier.hpp" |
| 0 | 30 |
| 31 VerificationType VerificationType::from_tag(u1 tag) { | |
| 32 switch (tag) { | |
| 33 case ITEM_Top: return bogus_type(); | |
| 34 case ITEM_Integer: return integer_type(); | |
| 35 case ITEM_Float: return float_type(); | |
| 36 case ITEM_Double: return double_type(); | |
| 37 case ITEM_Long: return long_type(); | |
| 38 case ITEM_Null: return null_type(); | |
| 39 default: | |
| 40 ShouldNotReachHere(); | |
| 41 return bogus_type(); | |
| 42 } | |
| 43 } | |
| 44 | |
| 45 bool VerificationType::is_reference_assignable_from( | |
| 18052 | 46 const VerificationType& from, ClassVerifier* context, |
| 47 bool from_field_is_protected, TRAPS) const { | |
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48 instanceKlassHandle klass = context->current_class(); |
| 0 | 49 if (from.is_null()) { |
| 50 // null is assignable to any reference | |
| 51 return true; | |
| 52 } else if (is_null()) { | |
| 53 return false; | |
| 54 } else if (name() == from.name()) { | |
| 55 return true; | |
| 56 } else if (is_object()) { | |
| 57 // We need check the class hierarchy to check assignability | |
| 58 if (name() == vmSymbols::java_lang_Object()) { | |
| 59 // any object or array is assignable to java.lang.Object | |
| 60 return true; | |
| 61 } | |
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62 Klass* obj = SystemDictionary::resolve_or_fail( |
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63 name(), Handle(THREAD, klass->class_loader()), |
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64 Handle(THREAD, klass->protection_domain()), true, CHECK_false); |
| 1803 | 65 KlassHandle this_class(THREAD, obj); |
| 66 | |
| 18052 | 67 if (this_class->is_interface() && (!from_field_is_protected || |
| 68 from.name() != vmSymbols::java_lang_Object())) { | |
| 69 // If we are not trying to access a protected field or method in | |
| 70 // java.lang.Object then we treat interfaces as java.lang.Object, | |
| 71 // including java.lang.Cloneable and java.io.Serializable. | |
| 0 | 72 return true; |
| 73 } else if (from.is_object()) { | |
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74 Klass* from_class = SystemDictionary::resolve_or_fail( |
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75 from.name(), Handle(THREAD, klass->class_loader()), |
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76 Handle(THREAD, klass->protection_domain()), true, CHECK_false); |
| 23893 | 77 bool result = InstanceKlass::cast(from_class)->is_subclass_of(this_class()); |
| 78 if (result && DumpSharedSpaces) { | |
| 79 if (klass()->is_subclass_of(from_class) && klass()->is_subclass_of(this_class())) { | |
| 80 // No need to save verification dependency. At run time, <klass> will be | |
| 81 // loaded from the archived only if <from_class> and <this_class> are | |
| 82 // also loaded from the archive. I.e., all 3 classes are exactly the same | |
| 83 // as we saw at archive creation time. | |
| 84 } else { | |
| 85 // Save the dependency. At run time, we need to check that the condition | |
| 86 // from_class->is_subclass_of(this_class() is still true. | |
| 87 Symbol* accessor_clsname = from.name(); | |
| 88 Symbol* target_clsname = this_class()->name(); | |
| 89 SystemDictionaryShared::add_verification_dependency(klass(), | |
| 90 accessor_clsname, target_clsname); | |
| 91 } | |
| 92 } | |
| 93 return result; | |
| 0 | 94 } |
| 95 } else if (is_array() && from.is_array()) { | |
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96 VerificationType comp_this = get_component(context, CHECK_false); |
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97 VerificationType comp_from = from.get_component(context, CHECK_false); |
| 1677 | 98 if (!comp_this.is_bogus() && !comp_from.is_bogus()) { |
| 18052 | 99 return comp_this.is_assignable_from(comp_from, context, |
| 100 from_field_is_protected, CHECK_false); | |
| 1677 | 101 } |
| 0 | 102 } |
| 103 return false; | |
| 104 } | |
| 105 | |
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106 VerificationType VerificationType::get_component(ClassVerifier *context, TRAPS) const { |
| 0 | 107 assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array"); |
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108 Symbol* component; |
| 0 | 109 switch (name()->byte_at(1)) { |
| 110 case 'Z': return VerificationType(Boolean); | |
| 111 case 'B': return VerificationType(Byte); | |
| 112 case 'C': return VerificationType(Char); | |
| 113 case 'S': return VerificationType(Short); | |
| 114 case 'I': return VerificationType(Integer); | |
| 115 case 'J': return VerificationType(Long); | |
| 116 case 'F': return VerificationType(Float); | |
| 117 case 'D': return VerificationType(Double); | |
| 118 case '[': | |
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119 component = context->create_temporary_symbol( |
| 0 | 120 name(), 1, name()->utf8_length(), |
| 121 CHECK_(VerificationType::bogus_type())); | |
| 122 return VerificationType::reference_type(component); | |
| 123 case 'L': | |
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124 component = context->create_temporary_symbol( |
| 0 | 125 name(), 2, name()->utf8_length() - 1, |
| 126 CHECK_(VerificationType::bogus_type())); | |
| 127 return VerificationType::reference_type(component); | |
| 128 default: | |
| 1677 | 129 // Met an invalid type signature, e.g. [X |
| 0 | 130 return VerificationType::bogus_type(); |
| 131 } | |
| 132 } | |
| 133 | |
| 134 void VerificationType::print_on(outputStream* st) const { | |
| 135 switch (_u._data) { | |
| 6605 | 136 case Bogus: st->print("top"); break; |
| 137 case Category1: st->print("category1"); break; | |
| 138 case Category2: st->print("category2"); break; | |
| 139 case Category2_2nd: st->print("category2_2nd"); break; | |
| 140 case Boolean: st->print("boolean"); break; | |
| 141 case Byte: st->print("byte"); break; | |
| 142 case Short: st->print("short"); break; | |
| 143 case Char: st->print("char"); break; | |
| 144 case Integer: st->print("integer"); break; | |
| 145 case Float: st->print("float"); break; | |
| 146 case Long: st->print("long"); break; | |
| 147 case Double: st->print("double"); break; | |
| 148 case Long_2nd: st->print("long_2nd"); break; | |
| 149 case Double_2nd: st->print("double_2nd"); break; | |
| 150 case Null: st->print("null"); break; | |
| 151 case ReferenceQuery: st->print("reference type"); break; | |
| 152 case Category1Query: st->print("category1 type"); break; | |
| 153 case Category2Query: st->print("category2 type"); break; | |
| 154 case Category2_2ndQuery: st->print("category2_2nd type"); break; | |
| 0 | 155 default: |
| 156 if (is_uninitialized_this()) { | |
| 6605 | 157 st->print("uninitializedThis"); |
| 0 | 158 } else if (is_uninitialized()) { |
| 6605 | 159 st->print("uninitialized %d", bci()); |
| 0 | 160 } else { |
| 6605 | 161 name()->print_value_on(st); |
| 0 | 162 } |
| 163 } | |
| 164 } |