Mercurial > hg > truffle
annotate src/share/vm/classfile/verificationType.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 4ee06e614636 |
| children | 2373a1f4987c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 6605 | 2 * Copyright (c) 2003, 2012, 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" | |
| 27 #include "classfile/verificationType.hpp" | |
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28 #include "classfile/verifier.hpp" |
| 0 | 29 |
| 30 VerificationType VerificationType::from_tag(u1 tag) { | |
| 31 switch (tag) { | |
| 32 case ITEM_Top: return bogus_type(); | |
| 33 case ITEM_Integer: return integer_type(); | |
| 34 case ITEM_Float: return float_type(); | |
| 35 case ITEM_Double: return double_type(); | |
| 36 case ITEM_Long: return long_type(); | |
| 37 case ITEM_Null: return null_type(); | |
| 38 default: | |
| 39 ShouldNotReachHere(); | |
| 40 return bogus_type(); | |
| 41 } | |
| 42 } | |
| 43 | |
| 44 bool VerificationType::is_reference_assignable_from( | |
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45 const VerificationType& from, ClassVerifier* context, TRAPS) const { |
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46 instanceKlassHandle klass = context->current_class(); |
| 0 | 47 if (from.is_null()) { |
| 48 // null is assignable to any reference | |
| 49 return true; | |
| 50 } else if (is_null()) { | |
| 51 return false; | |
| 52 } else if (name() == from.name()) { | |
| 53 return true; | |
| 54 } else if (is_object()) { | |
| 55 // We need check the class hierarchy to check assignability | |
| 56 if (name() == vmSymbols::java_lang_Object()) { | |
| 57 // any object or array is assignable to java.lang.Object | |
| 58 return true; | |
| 59 } | |
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60 Klass* obj = SystemDictionary::resolve_or_fail( |
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61 name(), Handle(THREAD, klass->class_loader()), |
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62 Handle(THREAD, klass->protection_domain()), true, CHECK_false); |
| 1803 | 63 KlassHandle this_class(THREAD, obj); |
| 64 | |
| 65 if (this_class->is_interface()) { | |
| 0 | 66 // We treat interfaces as java.lang.Object, including |
| 67 // java.lang.Cloneable and java.io.Serializable | |
| 68 return true; | |
| 69 } else if (from.is_object()) { | |
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70 Klass* from_class = SystemDictionary::resolve_or_fail( |
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71 from.name(), Handle(THREAD, klass->class_loader()), |
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72 Handle(THREAD, klass->protection_domain()), true, CHECK_false); |
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73 return InstanceKlass::cast(from_class)->is_subclass_of(this_class()); |
| 0 | 74 } |
| 75 } else if (is_array() && from.is_array()) { | |
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76 VerificationType comp_this = get_component(context, CHECK_false); |
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77 VerificationType comp_from = from.get_component(context, CHECK_false); |
| 1677 | 78 if (!comp_this.is_bogus() && !comp_from.is_bogus()) { |
| 79 return comp_this.is_assignable_from(comp_from, context, CHECK_false); | |
| 80 } | |
| 0 | 81 } |
| 82 return false; | |
| 83 } | |
| 84 | |
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85 VerificationType VerificationType::get_component(ClassVerifier *context, TRAPS) const { |
| 0 | 86 assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array"); |
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87 Symbol* component; |
| 0 | 88 switch (name()->byte_at(1)) { |
| 89 case 'Z': return VerificationType(Boolean); | |
| 90 case 'B': return VerificationType(Byte); | |
| 91 case 'C': return VerificationType(Char); | |
| 92 case 'S': return VerificationType(Short); | |
| 93 case 'I': return VerificationType(Integer); | |
| 94 case 'J': return VerificationType(Long); | |
| 95 case 'F': return VerificationType(Float); | |
| 96 case 'D': return VerificationType(Double); | |
| 97 case '[': | |
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98 component = context->create_temporary_symbol( |
| 0 | 99 name(), 1, name()->utf8_length(), |
| 100 CHECK_(VerificationType::bogus_type())); | |
| 101 return VerificationType::reference_type(component); | |
| 102 case 'L': | |
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103 component = context->create_temporary_symbol( |
| 0 | 104 name(), 2, name()->utf8_length() - 1, |
| 105 CHECK_(VerificationType::bogus_type())); | |
| 106 return VerificationType::reference_type(component); | |
| 107 default: | |
| 1677 | 108 // Met an invalid type signature, e.g. [X |
| 0 | 109 return VerificationType::bogus_type(); |
| 110 } | |
| 111 } | |
| 112 | |
| 113 void VerificationType::print_on(outputStream* st) const { | |
| 114 switch (_u._data) { | |
| 6605 | 115 case Bogus: st->print("top"); break; |
| 116 case Category1: st->print("category1"); break; | |
| 117 case Category2: st->print("category2"); break; | |
| 118 case Category2_2nd: st->print("category2_2nd"); break; | |
| 119 case Boolean: st->print("boolean"); break; | |
| 120 case Byte: st->print("byte"); break; | |
| 121 case Short: st->print("short"); break; | |
| 122 case Char: st->print("char"); break; | |
| 123 case Integer: st->print("integer"); break; | |
| 124 case Float: st->print("float"); break; | |
| 125 case Long: st->print("long"); break; | |
| 126 case Double: st->print("double"); break; | |
| 127 case Long_2nd: st->print("long_2nd"); break; | |
| 128 case Double_2nd: st->print("double_2nd"); break; | |
| 129 case Null: st->print("null"); break; | |
| 130 case ReferenceQuery: st->print("reference type"); break; | |
| 131 case Category1Query: st->print("category1 type"); break; | |
| 132 case Category2Query: st->print("category2 type"); break; | |
| 133 case Category2_2ndQuery: st->print("category2_2nd type"); break; | |
| 0 | 134 default: |
| 135 if (is_uninitialized_this()) { | |
| 6605 | 136 st->print("uninitializedThis"); |
| 0 | 137 } else if (is_uninitialized()) { |
| 6605 | 138 st->print("uninitialized %d", bci()); |
| 0 | 139 } else { |
| 6605 | 140 name()->print_value_on(st); |
| 0 | 141 } |
| 142 } | |
| 143 } |