Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/verificationType.cpp @ 1955:1070423b51f3
6865028: Illegal instructions passing verification prior to 'invokespecial Object.<init>'
Summary: Update verifier to conform to spec re: reference vs. 'Object' types
Reviewed-by: dholmes, coleenp
| author | kamg |
|---|---|
| date | Wed, 27 Oct 2010 12:53:36 -0400 |
| parents | 60f88489896f |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_verificationType.cpp.incl" | |
| 27 | |
| 28 VerificationType VerificationType::from_tag(u1 tag) { | |
| 29 switch (tag) { | |
| 30 case ITEM_Top: return bogus_type(); | |
| 31 case ITEM_Integer: return integer_type(); | |
| 32 case ITEM_Float: return float_type(); | |
| 33 case ITEM_Double: return double_type(); | |
| 34 case ITEM_Long: return long_type(); | |
| 35 case ITEM_Null: return null_type(); | |
| 36 default: | |
| 37 ShouldNotReachHere(); | |
| 38 return bogus_type(); | |
| 39 } | |
| 40 } | |
| 41 | |
| 42 bool VerificationType::is_reference_assignable_from( | |
| 43 const VerificationType& from, instanceKlassHandle context, TRAPS) const { | |
| 44 if (from.is_null()) { | |
| 45 // null is assignable to any reference | |
| 46 return true; | |
| 47 } else if (is_null()) { | |
| 48 return false; | |
| 49 } else if (name() == from.name()) { | |
| 50 return true; | |
| 51 } else if (is_object()) { | |
| 52 // We need check the class hierarchy to check assignability | |
| 53 if (name() == vmSymbols::java_lang_Object()) { | |
| 54 // any object or array is assignable to java.lang.Object | |
| 55 return true; | |
| 56 } | |
| 1803 | 57 klassOop obj = SystemDictionary::resolve_or_fail( |
| 0 | 58 name_handle(), Handle(THREAD, context->class_loader()), |
| 59 Handle(THREAD, context->protection_domain()), true, CHECK_false); | |
| 1803 | 60 KlassHandle this_class(THREAD, obj); |
| 61 | |
| 62 if (this_class->is_interface()) { | |
| 0 | 63 // We treat interfaces as java.lang.Object, including |
| 64 // java.lang.Cloneable and java.io.Serializable | |
| 65 return true; | |
| 66 } else if (from.is_object()) { | |
| 67 klassOop from_class = SystemDictionary::resolve_or_fail( | |
| 68 from.name_handle(), Handle(THREAD, context->class_loader()), | |
| 69 Handle(THREAD, context->protection_domain()), true, CHECK_false); | |
| 1803 | 70 return instanceKlass::cast(from_class)->is_subclass_of(this_class()); |
| 0 | 71 } |
| 72 } else if (is_array() && from.is_array()) { | |
| 73 VerificationType comp_this = get_component(CHECK_false); | |
| 74 VerificationType comp_from = from.get_component(CHECK_false); | |
| 1677 | 75 if (!comp_this.is_bogus() && !comp_from.is_bogus()) { |
| 76 return comp_this.is_assignable_from(comp_from, context, CHECK_false); | |
| 77 } | |
| 0 | 78 } |
| 79 return false; | |
| 80 } | |
| 81 | |
| 82 VerificationType VerificationType::get_component(TRAPS) const { | |
| 83 assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array"); | |
| 84 symbolOop component; | |
| 85 switch (name()->byte_at(1)) { | |
| 86 case 'Z': return VerificationType(Boolean); | |
| 87 case 'B': return VerificationType(Byte); | |
| 88 case 'C': return VerificationType(Char); | |
| 89 case 'S': return VerificationType(Short); | |
| 90 case 'I': return VerificationType(Integer); | |
| 91 case 'J': return VerificationType(Long); | |
| 92 case 'F': return VerificationType(Float); | |
| 93 case 'D': return VerificationType(Double); | |
| 94 case '[': | |
| 95 component = SymbolTable::lookup( | |
| 96 name(), 1, name()->utf8_length(), | |
| 97 CHECK_(VerificationType::bogus_type())); | |
| 98 return VerificationType::reference_type(component); | |
| 99 case 'L': | |
| 100 component = SymbolTable::lookup( | |
| 101 name(), 2, name()->utf8_length() - 1, | |
| 102 CHECK_(VerificationType::bogus_type())); | |
| 103 return VerificationType::reference_type(component); | |
| 104 default: | |
| 1677 | 105 // Met an invalid type signature, e.g. [X |
| 0 | 106 return VerificationType::bogus_type(); |
| 107 } | |
| 108 } | |
| 109 | |
| 110 #ifndef PRODUCT | |
| 111 | |
| 112 void VerificationType::print_on(outputStream* st) const { | |
| 113 switch (_u._data) { | |
| 114 case Bogus: st->print(" bogus "); break; | |
| 115 case Category1: st->print(" category1 "); break; | |
| 116 case Category2: st->print(" category2 "); break; | |
| 117 case Category2_2nd: st->print(" category2_2nd "); break; | |
| 118 case Boolean: st->print(" boolean "); break; | |
| 119 case Byte: st->print(" byte "); break; | |
| 120 case Short: st->print(" short "); break; | |
| 121 case Char: st->print(" char "); break; | |
| 122 case Integer: st->print(" integer "); break; | |
| 123 case Float: st->print(" float "); break; | |
| 124 case Long: st->print(" long "); break; | |
| 125 case Double: st->print(" double "); break; | |
| 126 case Long_2nd: st->print(" long_2nd "); break; | |
| 127 case Double_2nd: st->print(" double_2nd "); break; | |
| 128 case Null: st->print(" null "); break; | |
| 129 default: | |
| 130 if (is_uninitialized_this()) { | |
| 131 st->print(" uninitializedThis "); | |
| 132 } else if (is_uninitialized()) { | |
| 133 st->print(" uninitialized %d ", bci()); | |
| 134 } else { | |
| 135 st->print(" class %s ", name()->as_klass_external_name()); | |
| 136 } | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 #endif |