| File: | jdk/src/hotspot/share/runtime/fieldDescriptor.cpp |
| Warning: | line 167, column 7 Value stored to 'as_int' is never read |
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| 1 | /* |
| 2 | * Copyright (c) 1997, 2021, 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 "runtime/fieldDescriptor.inline.hpp" |
| 35 | #include "runtime/handles.inline.hpp" |
| 36 | #include "runtime/signature.hpp" |
| 37 | |
| 38 | |
| 39 | oop fieldDescriptor::loader() const { |
| 40 | return _cp->pool_holder()->class_loader(); |
| 41 | } |
| 42 | |
| 43 | Symbol* fieldDescriptor::generic_signature() const { |
| 44 | if (!has_generic_signature()) { |
| 45 | return NULL__null; |
| 46 | } |
| 47 | |
| 48 | int idx = 0; |
| 49 | InstanceKlass* ik = field_holder(); |
| 50 | for (AllFieldStream fs(ik); !fs.done(); fs.next()) { |
| 51 | if (idx == _index) { |
| 52 | return fs.generic_signature(); |
| 53 | } else { |
| 54 | idx ++; |
| 55 | } |
| 56 | } |
| 57 | assert(false, "should never happen")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 57, "assert(" "false" ") failed", "should never happen"); :: breakpoint(); } } while (0); |
| 58 | return vmSymbols::void_signature(); // return a default value (for code analyzers) |
| 59 | } |
| 60 | |
| 61 | bool fieldDescriptor::is_trusted_final() const { |
| 62 | InstanceKlass* ik = field_holder(); |
| 63 | return is_final() && (is_static() || ik->is_hidden() || ik->is_record()); |
| 64 | } |
| 65 | |
| 66 | AnnotationArray* fieldDescriptor::annotations() const { |
| 67 | InstanceKlass* ik = field_holder(); |
| 68 | Array<AnnotationArray*>* md = ik->fields_annotations(); |
| 69 | if (md == NULL__null) |
| 70 | return NULL__null; |
| 71 | return md->at(index()); |
| 72 | } |
| 73 | |
| 74 | AnnotationArray* fieldDescriptor::type_annotations() const { |
| 75 | InstanceKlass* ik = field_holder(); |
| 76 | Array<AnnotationArray*>* type_annos = ik->fields_type_annotations(); |
| 77 | if (type_annos == NULL__null) |
| 78 | return NULL__null; |
| 79 | return type_annos->at(index()); |
| 80 | } |
| 81 | |
| 82 | constantTag fieldDescriptor::initial_value_tag() const { |
| 83 | return constants()->tag_at(initial_value_index()); |
| 84 | } |
| 85 | |
| 86 | jint fieldDescriptor::int_initial_value() const { |
| 87 | return constants()->int_at(initial_value_index()); |
| 88 | } |
| 89 | |
| 90 | jlong fieldDescriptor::long_initial_value() const { |
| 91 | return constants()->long_at(initial_value_index()); |
| 92 | } |
| 93 | |
| 94 | jfloat fieldDescriptor::float_initial_value() const { |
| 95 | return constants()->float_at(initial_value_index()); |
| 96 | } |
| 97 | |
| 98 | jdouble fieldDescriptor::double_initial_value() const { |
| 99 | return constants()->double_at(initial_value_index()); |
| 100 | } |
| 101 | |
| 102 | oop fieldDescriptor::string_initial_value(TRAPSJavaThread* __the_thread__) const { |
| 103 | return constants()->uncached_string_at(initial_value_index(), THREAD__the_thread__); |
| 104 | } |
| 105 | |
| 106 | void fieldDescriptor::reinitialize(InstanceKlass* ik, int index) { |
| 107 | if (_cp.is_null() || field_holder() != ik) { |
| 108 | _cp = constantPoolHandle(Thread::current(), ik->constants()); |
| 109 | // _cp should now reference ik's constant pool; i.e., ik is now field_holder. |
| 110 | assert(field_holder() == ik, "must be already initialized to this class")do { if (!(field_holder() == ik)) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 110, "assert(" "field_holder() == ik" ") failed", "must be already initialized to this class" ); ::breakpoint(); } } while (0); |
| 111 | } |
| 112 | FieldInfo* f = ik->field(index); |
| 113 | _access_flags = accessFlags_from(f->access_flags()); |
| 114 | guarantee(f->name_index() != 0 && f->signature_index() != 0, "bad constant pool index for fieldDescriptor")do { if (!(f->name_index() != 0 && f->signature_index () != 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 114, "guarantee(" "f->name_index() != 0 && f->signature_index() != 0" ") failed", "bad constant pool index for fieldDescriptor"); :: breakpoint(); } } while (0); |
| 115 | _index = index; |
| 116 | verify(); |
| 117 | } |
| 118 | |
| 119 | #ifndef PRODUCT |
| 120 | |
| 121 | void fieldDescriptor::verify() const { |
| 122 | if (_cp.is_null()) { |
| 123 | assert(_index == badInt, "constructor must be called")do { if (!(_index == badInt)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 123, "assert(" "_index == badInt" ") failed", "constructor must be called" ); ::breakpoint(); } } while (0); // see constructor |
| 124 | } else { |
| 125 | assert(_index >= 0, "good index")do { if (!(_index >= 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 125, "assert(" "_index >= 0" ") failed", "good index"); :: breakpoint(); } } while (0); |
| 126 | assert(access_flags().is_internal() ||do { if (!(access_flags().is_internal() || _index < field_holder ()->java_fields_count())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 127, "assert(" "access_flags().is_internal() || _index < field_holder()->java_fields_count()" ") failed", "oob"); ::breakpoint(); } } while (0) |
| 127 | _index < field_holder()->java_fields_count(), "oob")do { if (!(access_flags().is_internal() || _index < field_holder ()->java_fields_count())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 127, "assert(" "access_flags().is_internal() || _index < field_holder()->java_fields_count()" ") failed", "oob"); ::breakpoint(); } } while (0); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | #endif /* PRODUCT */ |
| 132 | |
| 133 | void fieldDescriptor::print_on(outputStream* st) const { |
| 134 | access_flags().print_on(st); |
| 135 | if (access_flags().is_internal()) st->print("internal "); |
| 136 | name()->print_value_on(st); |
| 137 | st->print(" "); |
| 138 | signature()->print_value_on(st); |
| 139 | st->print(" @%d ", offset()); |
| 140 | if (WizardMode && has_initial_value()) { |
| 141 | st->print("(initval "); |
| 142 | constantTag t = initial_value_tag(); |
| 143 | if (t.is_int()) { |
| 144 | st->print("int %d)", int_initial_value()); |
| 145 | } else if (t.is_long()){ |
| 146 | st->print_jlong(long_initial_value()); |
| 147 | } else if (t.is_float()){ |
| 148 | st->print("float %f)", float_initial_value()); |
| 149 | } else if (t.is_double()){ |
| 150 | st->print("double %lf)", double_initial_value()); |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | void fieldDescriptor::print() const { print_on(tty); } |
| 156 | |
| 157 | void fieldDescriptor::print_on_for(outputStream* st, oop obj) { |
| 158 | print_on(st); |
| 159 | BasicType ft = field_type(); |
| 160 | jint as_int = 0; |
| 161 | switch (ft) { |
| 162 | case T_BYTE: |
| 163 | as_int = (jint)obj->byte_field(offset()); |
| 164 | st->print(" %d", obj->byte_field(offset())); |
| 165 | break; |
| 166 | case T_CHAR: |
| 167 | as_int = (jint)obj->char_field(offset()); |
Value stored to 'as_int' is never read | |
| 168 | { |
| 169 | jchar c = obj->char_field(offset()); |
| 170 | as_int = c; |
| 171 | st->print(" %c %d", isprint(c) ? c : ' ', c); |
| 172 | } |
| 173 | break; |
| 174 | case T_DOUBLE: |
| 175 | st->print(" %lf", obj->double_field(offset())); |
| 176 | break; |
| 177 | case T_FLOAT: |
| 178 | as_int = obj->int_field(offset()); |
| 179 | st->print(" %f", obj->float_field(offset())); |
| 180 | break; |
| 181 | case T_INT: |
| 182 | as_int = obj->int_field(offset()); |
| 183 | st->print(" %d", obj->int_field(offset())); |
| 184 | break; |
| 185 | case T_LONG: |
| 186 | st->print(" "); |
| 187 | st->print_jlong(obj->long_field(offset())); |
| 188 | break; |
| 189 | case T_SHORT: |
| 190 | as_int = obj->short_field(offset()); |
| 191 | st->print(" %d", obj->short_field(offset())); |
| 192 | break; |
| 193 | case T_BOOLEAN: |
| 194 | as_int = obj->bool_field(offset()); |
| 195 | st->print(" %s", obj->bool_field(offset()) ? "true" : "false"); |
| 196 | break; |
| 197 | case T_ARRAY: |
| 198 | st->print(" "); |
| 199 | NOT_LP64(as_int = obj->int_field(offset())); |
| 200 | if (obj->obj_field(offset()) != NULL__null) { |
| 201 | obj->obj_field(offset())->print_value_on(st); |
| 202 | } else { |
| 203 | st->print("NULL"); |
| 204 | } |
| 205 | break; |
| 206 | case T_OBJECT: |
| 207 | st->print(" "); |
| 208 | NOT_LP64(as_int = obj->int_field(offset())); |
| 209 | if (obj->obj_field(offset()) != NULL__null) { |
| 210 | obj->obj_field(offset())->print_value_on(st); |
| 211 | } else { |
| 212 | st->print("NULL"); |
| 213 | } |
| 214 | break; |
| 215 | default: |
| 216 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/fieldDescriptor.cpp" , 216); ::breakpoint(); } while (0); |
| 217 | break; |
| 218 | } |
| 219 | // Print a hint as to the underlying integer representation. This can be wrong for |
| 220 | // pointers on an LP64 machine |
| 221 | #ifdef _LP641 |
| 222 | if (is_reference_type(ft) && UseCompressedOops) { |
| 223 | st->print(" (%x)", obj->int_field(offset())); |
| 224 | } |
| 225 | else // <- intended |
| 226 | #endif |
| 227 | if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft))|| !is_java_primitive(ft) ) { |
| 228 | st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint))); |
| 229 | } else if (as_int < 0 || as_int > 9) { |
| 230 | st->print(" (%x)", as_int); |
| 231 | } |
| 232 | } |
| 233 |