1 /* 2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/vmSymbols.hpp" 27 #include "memory/resourceArea.hpp" 28 #include "oops/annotations.hpp" 29 #include "oops/constantPool.hpp" 30 #include "oops/instanceKlass.hpp" 31 #include "oops/klass.inline.hpp" 32 #include "oops/oop.inline.hpp" 33 #include "oops/fieldStreams.inline.hpp" 34 #include "oops/inlineKlass.inline.hpp" 35 #include "runtime/fieldDescriptor.inline.hpp" 36 #include "runtime/handles.inline.hpp" 37 #include "runtime/signature.hpp" 38 39 Symbol* fieldDescriptor::generic_signature() const { 40 if (!has_generic_signature()) { 41 return nullptr; 42 } 43 return _cp->symbol_at(_fieldinfo.generic_signature_index()); 44 } 45 46 bool fieldDescriptor::is_trusted_final() const { 47 InstanceKlass* ik = field_holder(); 48 return is_final() && (is_static() || ik->is_hidden() || ik->is_record() || ik->is_inline_klass() 49 || (ik->is_abstract() && !ik->is_identity_class() && !ik->is_interface())); 50 } 51 52 AnnotationArray* fieldDescriptor::annotations() const { 53 InstanceKlass* ik = field_holder(); 54 Array<AnnotationArray*>* md = ik->fields_annotations(); 55 if (md == nullptr) 56 return nullptr; 57 return md->at(index()); 58 } 59 60 AnnotationArray* fieldDescriptor::type_annotations() const { 61 InstanceKlass* ik = field_holder(); 62 Array<AnnotationArray*>* type_annos = ik->fields_type_annotations(); 63 if (type_annos == nullptr) 64 return nullptr; 65 return type_annos->at(index()); 66 } 67 68 constantTag fieldDescriptor::initial_value_tag() const { 69 return constants()->tag_at(initial_value_index()); 70 } 71 72 jint fieldDescriptor::int_initial_value() const { 73 return constants()->int_at(initial_value_index()); 74 } 75 76 jlong fieldDescriptor::long_initial_value() const { 77 return constants()->long_at(initial_value_index()); 78 } 79 80 jfloat fieldDescriptor::float_initial_value() const { 81 return constants()->float_at(initial_value_index()); 82 } 83 84 jdouble fieldDescriptor::double_initial_value() const { 85 return constants()->double_at(initial_value_index()); 86 } 87 88 oop fieldDescriptor::string_initial_value(TRAPS) const { 89 return constants()->uncached_string_at(initial_value_index(), THREAD); 90 } 91 92 void fieldDescriptor::reinitialize(InstanceKlass* ik, int index) { 93 if (_cp.is_null() || field_holder() != ik) { 94 _cp = constantPoolHandle(Thread::current(), ik->constants()); 95 // _cp should now reference ik's constant pool; i.e., ik is now field_holder. 96 // If the class is a scratch class, the constant pool points to the original class, 97 // but that's ok because of constant pool merging. 98 assert(field_holder() == ik || ik->is_scratch_class(), "must be already initialized to this class"); 99 } 100 _fieldinfo= ik->field(index); 101 assert((int)_fieldinfo.index() == index, "just checking"); 102 guarantee(_fieldinfo.name_index() != 0 && _fieldinfo.signature_index() != 0, "bad constant pool index for fieldDescriptor"); 103 } 104 105 void fieldDescriptor::print_on(outputStream* st) const { 106 access_flags().print_on(st); 107 if (field_flags().is_injected()) st->print("injected "); 108 name()->print_value_on(st); 109 st->print(" "); 110 signature()->print_value_on(st); 111 st->print(" @%d ", offset()); 112 if (WizardMode && has_initial_value()) { 113 st->print("(initval "); 114 constantTag t = initial_value_tag(); 115 if (t.is_int()) { 116 st->print("int %d)", int_initial_value()); 117 } else if (t.is_long()){ 118 st->print_jlong(long_initial_value()); 119 } else if (t.is_float()){ 120 st->print("float %f)", float_initial_value()); 121 } else if (t.is_double()){ 122 st->print("double %lf)", double_initial_value()); 123 } 124 } 125 } 126 127 void fieldDescriptor::print() const { print_on(tty); } 128 129 void fieldDescriptor::print_on_for(outputStream* st, oop obj) { 130 BasicType ft = field_type(); 131 if (!is_null_free_inline_type()) { 132 print_on(st); 133 st->print(" "); 134 } 135 jint as_int = 0; 136 switch (ft) { 137 case T_BYTE: 138 st->print("%d", obj->byte_field(offset())); 139 break; 140 case T_CHAR: 141 { 142 jchar c = obj->char_field(offset()); 143 st->print("%c %d", isprint(c) ? c : ' ', c); 144 } 145 break; 146 case T_DOUBLE: 147 st->print("%lf", obj->double_field(offset())); 148 break; 149 case T_FLOAT: 150 st->print("%f", obj->float_field(offset())); 151 break; 152 case T_INT: 153 st->print("%d", obj->int_field(offset())); 154 break; 155 case T_LONG: 156 st->print_jlong(obj->long_field(offset())); 157 break; 158 case T_SHORT: 159 st->print("%d", obj->short_field(offset())); 160 break; 161 case T_BOOLEAN: 162 st->print("%s", obj->bool_field(offset()) ? "true" : "false"); 163 break; 164 case T_ARRAY: 165 case T_OBJECT: 166 if (is_flat()) { // only some inline types can be flat 167 assert(is_null_free_inline_type(), "Only null free inline type fields can be flat"); 168 // Print fields of flat fields (recursively) 169 InlineKlass* vk = InlineKlass::cast(field_holder()->get_inline_type_field_klass(index())); 170 int field_offset = offset() - vk->first_field_offset(); 171 obj = cast_to_oop(cast_from_oop<address>(obj) + field_offset); 172 st->print_cr("Flat inline type field '%s':", vk->name()->as_C_string()); 173 FieldPrinter print_field(st, obj); 174 vk->do_nonstatic_fields(&print_field); 175 return; // Do not print underlying representation 176 } 177 // Not flat inline type field, fall through 178 if (obj->obj_field(offset()) != nullptr) { 179 obj->obj_field(offset())->print_value_on(st); 180 } else { 181 st->print("null"); 182 } 183 break; 184 default: 185 ShouldNotReachHere(); 186 break; 187 } 188 189 // Print a hint as to the underlying integer representation. 190 if (is_reference_type(ft)) { 191 #ifdef _LP64 192 if (UseCompressedOops) { 193 st->print(" (" INT32_FORMAT_X_0 ")", obj->int_field(offset())); 194 } else { 195 st->print(" (" INT64_FORMAT_X_0 ")", (int64_t)obj->long_field(offset())); 196 } 197 #else 198 st->print(" (" INT32_FORMAT_X_0 ")", obj->int_field(offset())); 199 #endif 200 } else { // Primitives 201 switch (ft) { 202 case T_LONG: st->print(" (" INT64_FORMAT_X_0 ")", (int64_t)obj->long_field(offset())); break; 203 case T_DOUBLE: st->print(" (" INT64_FORMAT_X_0 ")", (int64_t)obj->long_field(offset())); break; 204 case T_BYTE: st->print(" (" INT8_FORMAT_X_0 ")", obj->byte_field(offset())); break; 205 case T_CHAR: st->print(" (" INT16_FORMAT_X_0 ")", obj->char_field(offset())); break; 206 case T_FLOAT: st->print(" (" INT32_FORMAT_X_0 ")", obj->int_field(offset())); break; 207 case T_INT: st->print(" (" INT32_FORMAT_X_0 ")", obj->int_field(offset())); break; 208 case T_SHORT: st->print(" (" INT16_FORMAT_X_0 ")", obj->short_field(offset())); break; 209 case T_BOOLEAN: st->print(" (" INT8_FORMAT_X_0 ")", obj->bool_field(offset())); break; 210 default: 211 ShouldNotReachHere(); 212 break; 213 } 214 } 215 } --- EOF ---