Tue, 15 Nov 2011 20:17:33 +0100
7110152: assert(size_in_words <= (julong)max_jint) failed: no overflow
Summary: Reduce what arrayOopDesc::max_array_length() returns to avoid int overflow
Reviewed-by: kvn, dholmes, tonyp
never@3137 | 1 | /* |
never@3137 | 2 | * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
never@3137 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
never@3137 | 4 | * |
never@3137 | 5 | * This code is free software; you can redistribute it and/or modify it |
never@3137 | 6 | * under the terms of the GNU General Public License version 2 only, as |
never@3137 | 7 | * published by the Free Software Foundation. |
never@3137 | 8 | * |
never@3137 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
never@3137 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
never@3137 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
never@3137 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
never@3137 | 13 | * accompanied this code). |
never@3137 | 14 | * |
never@3137 | 15 | * You should have received a copy of the GNU General Public License version |
never@3137 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
never@3137 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
never@3137 | 18 | * |
never@3137 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
never@3137 | 20 | * or visit www.oracle.com if you need additional information or have any |
never@3137 | 21 | * questions. |
never@3137 | 22 | * |
never@3137 | 23 | */ |
never@3137 | 24 | |
never@3137 | 25 | #ifndef SHARE_VM_OOPS_FIELDSTREAMS_HPP |
never@3137 | 26 | #define SHARE_VM_OOPS_FIELDSTREAMS_HPP |
never@3137 | 27 | |
never@3137 | 28 | #include "oops/instanceKlass.hpp" |
never@3137 | 29 | #include "oops/fieldInfo.hpp" |
never@3137 | 30 | |
never@3137 | 31 | // The is the base class for iteration over the fields array |
never@3137 | 32 | // describing the declared fields in the class. Several subclasses |
never@3137 | 33 | // are provided depending on the kind of iteration required. The |
never@3137 | 34 | // JavaFieldStream is for iterating over regular Java fields and it |
never@3137 | 35 | // generally the preferred iterator. InternalFieldStream only |
never@3137 | 36 | // iterates over fields that have been injected by the JVM. |
never@3137 | 37 | // AllFieldStream exposes all fields and should only be used in rare |
never@3137 | 38 | // cases. |
never@3137 | 39 | class FieldStreamBase : public StackObj { |
never@3137 | 40 | protected: |
never@3137 | 41 | typeArrayHandle _fields; |
never@3137 | 42 | constantPoolHandle _constants; |
never@3137 | 43 | int _index; |
never@3137 | 44 | int _limit; |
never@3137 | 45 | |
never@3137 | 46 | FieldInfo* field() const { return FieldInfo::from_field_array(_fields(), _index); } |
never@3137 | 47 | |
never@3137 | 48 | FieldStreamBase(typeArrayHandle fields, constantPoolHandle constants, int start, int limit) { |
never@3137 | 49 | _fields = fields; |
never@3137 | 50 | _constants = constants; |
never@3137 | 51 | _index = start; |
never@3137 | 52 | _limit = limit; |
never@3137 | 53 | } |
never@3137 | 54 | |
never@3137 | 55 | FieldStreamBase(typeArrayHandle fields, constantPoolHandle constants) { |
never@3137 | 56 | _fields = fields; |
never@3137 | 57 | _constants = constants; |
never@3137 | 58 | _index = 0; |
never@3137 | 59 | _limit = fields->length() / FieldInfo::field_slots; |
never@3137 | 60 | } |
never@3137 | 61 | |
never@3137 | 62 | public: |
never@3137 | 63 | FieldStreamBase(instanceKlass* klass) { |
never@3137 | 64 | _fields = klass->fields(); |
never@3137 | 65 | _constants = klass->constants(); |
never@3137 | 66 | _index = 0; |
never@3137 | 67 | _limit = klass->java_fields_count(); |
never@3137 | 68 | } |
never@3137 | 69 | FieldStreamBase(instanceKlassHandle klass) { |
never@3137 | 70 | _fields = klass->fields(); |
never@3137 | 71 | _constants = klass->constants(); |
never@3137 | 72 | _index = 0; |
never@3137 | 73 | _limit = klass->java_fields_count(); |
never@3137 | 74 | } |
never@3137 | 75 | |
never@3137 | 76 | // accessors |
never@3137 | 77 | int index() const { return _index; } |
never@3137 | 78 | |
never@3137 | 79 | void next() { _index += 1; } |
never@3137 | 80 | bool done() const { return _index >= _limit; } |
never@3137 | 81 | |
never@3137 | 82 | // Accessors for current field |
never@3137 | 83 | AccessFlags access_flags() const { |
never@3137 | 84 | AccessFlags flags; |
never@3137 | 85 | flags.set_flags(field()->access_flags()); |
never@3137 | 86 | return flags; |
never@3137 | 87 | } |
never@3137 | 88 | |
never@3137 | 89 | void set_access_flags(u2 flags) const { |
never@3137 | 90 | field()->set_access_flags(flags); |
never@3137 | 91 | } |
never@3137 | 92 | |
never@3137 | 93 | void set_access_flags(AccessFlags flags) const { |
never@3137 | 94 | set_access_flags(flags.as_short()); |
never@3137 | 95 | } |
never@3137 | 96 | |
never@3137 | 97 | Symbol* name() const { |
never@3137 | 98 | return field()->name(_constants); |
never@3137 | 99 | } |
never@3137 | 100 | |
never@3137 | 101 | Symbol* signature() const { |
never@3137 | 102 | return field()->signature(_constants); |
never@3137 | 103 | } |
never@3137 | 104 | |
never@3137 | 105 | Symbol* generic_signature() const { |
never@3137 | 106 | return field()->generic_signature(_constants); |
never@3137 | 107 | } |
never@3137 | 108 | |
never@3137 | 109 | int offset() const { |
never@3137 | 110 | return field()->offset(); |
never@3137 | 111 | } |
never@3137 | 112 | |
never@3137 | 113 | void set_offset(int offset) { |
never@3137 | 114 | field()->set_offset(offset); |
never@3137 | 115 | } |
never@3137 | 116 | }; |
never@3137 | 117 | |
never@3137 | 118 | // Iterate over only the internal fields |
never@3137 | 119 | class JavaFieldStream : public FieldStreamBase { |
never@3137 | 120 | public: |
never@3137 | 121 | JavaFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants(), 0, k->java_fields_count()) {} |
never@3137 | 122 | JavaFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), 0, k->java_fields_count()) {} |
never@3137 | 123 | |
never@3137 | 124 | int name_index() const { |
never@3137 | 125 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 126 | return field()->name_index(); |
never@3137 | 127 | } |
never@3137 | 128 | void set_name_index(int index) { |
never@3137 | 129 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 130 | field()->set_name_index(index); |
never@3137 | 131 | } |
never@3137 | 132 | int signature_index() const { |
never@3137 | 133 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 134 | return field()->signature_index(); |
never@3137 | 135 | } |
never@3137 | 136 | void set_signature_index(int index) { |
never@3137 | 137 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 138 | field()->set_signature_index(index); |
never@3137 | 139 | } |
never@3137 | 140 | int generic_signature_index() const { |
never@3137 | 141 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 142 | return field()->generic_signature_index(); |
never@3137 | 143 | } |
never@3137 | 144 | void set_generic_signature_index(int index) { |
never@3137 | 145 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 146 | field()->set_generic_signature_index(index); |
never@3137 | 147 | } |
never@3137 | 148 | int initval_index() const { |
never@3137 | 149 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 150 | return field()->initval_index(); |
never@3137 | 151 | } |
never@3137 | 152 | void set_initval_index(int index) { |
never@3137 | 153 | assert(!field()->is_internal(), "regular only"); |
never@3137 | 154 | return field()->set_initval_index(index); |
never@3137 | 155 | } |
never@3137 | 156 | }; |
never@3137 | 157 | |
never@3137 | 158 | |
never@3137 | 159 | // Iterate over only the internal fields |
never@3137 | 160 | class InternalFieldStream : public FieldStreamBase { |
never@3137 | 161 | public: |
never@3137 | 162 | InternalFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), k->all_fields_count()) {} |
never@3137 | 163 | InternalFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), k->all_fields_count()) {} |
never@3137 | 164 | }; |
never@3137 | 165 | |
never@3137 | 166 | |
never@3137 | 167 | class AllFieldStream : public FieldStreamBase { |
never@3137 | 168 | public: |
never@3137 | 169 | AllFieldStream(typeArrayHandle fields, constantPoolHandle constants): FieldStreamBase(fields, constants) {} |
never@3137 | 170 | AllFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants()) {} |
never@3137 | 171 | AllFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants()) {} |
never@3137 | 172 | }; |
never@3137 | 173 | |
never@3137 | 174 | #endif // SHARE_VM_OOPS_FIELDSTREAMS_HPP |