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annotate src/share/vm/ci/ciSignature.cpp @ 4001:5eb9169b1a14
7092712: JSR 292: unloaded invokedynamic call sites can lead to a crash with signature types not on BCP
Reviewed-by: jrose, never
| author | twisti |
|---|---|
| date | Wed, 12 Oct 2011 21:00:13 -0700 |
| parents | ddd894528dbc |
| children | f6b0eb4e44cf |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2011, 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 "ci/ciSignature.hpp" | |
| 27 #include "ci/ciUtilities.hpp" | |
| 28 #include "memory/allocation.inline.hpp" | |
| 29 #include "oops/oop.inline.hpp" | |
| 30 #include "runtime/signature.hpp" | |
| 0 | 31 |
| 32 // ciSignature | |
| 33 // | |
| 34 // This class represents the signature of a method. | |
| 35 | |
| 36 // ------------------------------------------------------------------ | |
| 37 // ciSignature::ciSignature | |
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38 ciSignature::ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* symbol) { |
| 0 | 39 ASSERT_IN_VM; |
| 40 EXCEPTION_CONTEXT; | |
| 41 _accessing_klass = accessing_klass; | |
| 42 _symbol = symbol; | |
| 43 | |
| 44 ciEnv* env = CURRENT_ENV; | |
| 45 Arena* arena = env->arena(); | |
| 46 _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL); | |
| 47 | |
| 48 int size = 0; | |
| 49 int count = 0; | |
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50 ResourceMark rm(THREAD); |
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51 Symbol* sh = symbol->get_symbol(); |
| 0 | 52 SignatureStream ss(sh); |
| 53 for (; ; ss.next()) { | |
| 54 // Process one element of the signature | |
| 55 ciType* type; | |
| 56 if (!ss.is_object()) { | |
| 57 type = ciType::make(ss.type()); | |
| 58 } else { | |
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59 Symbol* name = ss.as_symbol(THREAD); |
| 0 | 60 if (HAS_PENDING_EXCEPTION) { |
| 61 type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass() | |
| 62 : (ciType*)ciEnv::unloaded_ciinstance_klass(); | |
| 63 env->record_out_of_memory_failure(); | |
| 64 CLEAR_PENDING_EXCEPTION; | |
| 65 } else { | |
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66 ciSymbol* klass_name = env->get_symbol(name); |
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67 type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false); |
| 0 | 68 } |
| 69 } | |
| 70 _types->append(type); | |
| 71 if (ss.at_return_type()) { | |
| 72 // Done processing the return type; do not add it into the count. | |
| 73 break; | |
| 74 } | |
| 75 size += type->size(); | |
| 76 count++; | |
| 77 } | |
| 78 _size = size; | |
| 79 _count = count; | |
| 80 } | |
| 81 | |
| 82 // ------------------------------------------------------------------ | |
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83 // ciSignature::return_type |
| 0 | 84 // |
| 85 // What is the return type of this signature? | |
| 86 ciType* ciSignature::return_type() const { | |
| 87 return _types->at(_count); | |
| 88 } | |
| 89 | |
| 90 // ------------------------------------------------------------------ | |
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91 // ciSignature::type_at |
| 0 | 92 // |
| 93 // What is the type of the index'th element of this | |
| 94 // signature? | |
| 95 ciType* ciSignature::type_at(int index) const { | |
| 96 assert(index < _count, "out of bounds"); | |
| 97 // The first _klasses element holds the return klass. | |
| 98 return _types->at(index); | |
| 99 } | |
| 100 | |
| 101 // ------------------------------------------------------------------ | |
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102 // ciSignature::equals |
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103 // |
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104 // Compare this signature to another one. Signatures with different |
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105 // accessing classes but with signature-types resolved to the same |
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106 // types are defined to be equal. |
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107 bool ciSignature::equals(ciSignature* that) { |
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108 // Compare signature |
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109 if (!this->as_symbol()->equals(that->as_symbol())) return false; |
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110 // Compare all types of the arguments |
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111 for (int i = 0; i < _count; i++) { |
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112 if (this->type_at(i) != that->type_at(i)) return false; |
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113 } |
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114 // Compare the return type |
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115 if (this->return_type() != that->return_type()) return false; |
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116 return true; |
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117 } |
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118 |
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119 // ------------------------------------------------------------------ |
| 0 | 120 // ciSignature::print_signature |
| 121 void ciSignature::print_signature() { | |
| 122 _symbol->print_symbol(); | |
| 123 } | |
| 124 | |
| 125 // ------------------------------------------------------------------ | |
| 126 // ciSignature::print | |
| 127 void ciSignature::print() { | |
| 128 tty->print("<ciSignature symbol="); | |
| 129 print_signature(); | |
| 130 tty->print(" accessing_klass="); | |
| 131 _accessing_klass->print(); | |
| 132 tty->print(" address=0x%x>", (address)this); | |
| 133 } |