Mercurial > hg > truffle
annotate src/share/vm/runtime/fieldDescriptor.cpp @ 6100:71afdabfd05b
7168280: Eliminate the generic signature index slot from field array for field without generic signature.
Summary: Only allocate the generic signature index slot in the field array for field with generic signature attribute.
Reviewed-by: coleenp, dlong
| author | jiangli |
|---|---|
| date | Mon, 21 May 2012 14:10:35 -0400 |
| parents | e6b1331a51d2 |
| children | 634b8615a6ba |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, 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 "classfile/systemDictionary.hpp" | |
| 27 #include "classfile/vmSymbols.hpp" | |
| 28 #include "memory/resourceArea.hpp" | |
| 29 #include "memory/universe.inline.hpp" | |
| 30 #include "oops/instanceKlass.hpp" | |
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31 #include "oops/fieldStreams.hpp" |
| 1972 | 32 #include "runtime/fieldDescriptor.hpp" |
| 33 #include "runtime/handles.inline.hpp" | |
| 34 #include "runtime/signature.hpp" | |
| 0 | 35 |
| 36 | |
| 37 oop fieldDescriptor::loader() const { | |
| 38 return instanceKlass::cast(_cp->pool_holder())->class_loader(); | |
| 39 } | |
| 40 | |
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41 Symbol* fieldDescriptor::generic_signature() const { |
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42 int idx = 0; |
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43 instanceKlass* ik = instanceKlass::cast(field_holder()); |
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44 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { |
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45 if (idx == _index) { |
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46 return fs.generic_signature(); |
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47 } else { |
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48 idx ++; |
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49 } |
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50 } |
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51 assert(false, "should never happen"); |
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52 return NULL; |
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53 } |
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54 |
| 0 | 55 typeArrayOop fieldDescriptor::annotations() const { |
| 56 instanceKlass* ik = instanceKlass::cast(field_holder()); | |
| 57 objArrayOop md = ik->fields_annotations(); | |
| 58 if (md == NULL) | |
| 59 return NULL; | |
| 3938 | 60 return typeArrayOop(md->obj_at(index())); |
| 0 | 61 } |
| 62 | |
| 63 constantTag fieldDescriptor::initial_value_tag() const { | |
| 3938 | 64 return constants()->tag_at(initial_value_index()); |
| 0 | 65 } |
| 66 | |
| 67 jint fieldDescriptor::int_initial_value() const { | |
| 3938 | 68 return constants()->int_at(initial_value_index()); |
| 0 | 69 } |
| 70 | |
| 71 jlong fieldDescriptor::long_initial_value() const { | |
| 3938 | 72 return constants()->long_at(initial_value_index()); |
| 0 | 73 } |
| 74 | |
| 75 jfloat fieldDescriptor::float_initial_value() const { | |
| 3938 | 76 return constants()->float_at(initial_value_index()); |
| 0 | 77 } |
| 78 | |
| 79 jdouble fieldDescriptor::double_initial_value() const { | |
| 3938 | 80 return constants()->double_at(initial_value_index()); |
| 0 | 81 } |
| 82 | |
| 83 oop fieldDescriptor::string_initial_value(TRAPS) const { | |
| 3938 | 84 return constants()->string_at(initial_value_index(), CHECK_0); |
| 0 | 85 } |
| 86 | |
| 87 void fieldDescriptor::initialize(klassOop k, int index) { | |
| 88 instanceKlass* ik = instanceKlass::cast(k); | |
| 89 _cp = ik->constants(); | |
| 3938 | 90 FieldInfo* f = ik->field(index); |
| 91 assert(!f->is_internal(), "regular Java fields only"); | |
| 0 | 92 |
| 3938 | 93 _access_flags = accessFlags_from(f->access_flags()); |
| 94 guarantee(f->name_index() != 0 && f->signature_index() != 0, "bad constant pool index for fieldDescriptor"); | |
| 0 | 95 _index = index; |
| 96 } | |
| 97 | |
| 98 #ifndef PRODUCT | |
| 99 | |
| 100 void fieldDescriptor::print_on(outputStream* st) const { | |
| 3938 | 101 access_flags().print_on(st); |
| 102 name()->print_value_on(st); | |
| 0 | 103 st->print(" "); |
| 3938 | 104 signature()->print_value_on(st); |
| 0 | 105 st->print(" @%d ", offset()); |
| 106 if (WizardMode && has_initial_value()) { | |
| 107 st->print("(initval "); | |
| 108 constantTag t = initial_value_tag(); | |
| 109 if (t.is_int()) { | |
| 110 st->print("int %d)", int_initial_value()); | |
| 111 } else if (t.is_long()){ | |
| 112 st->print_jlong(long_initial_value()); | |
| 113 } else if (t.is_float()){ | |
| 114 st->print("float %f)", float_initial_value()); | |
| 115 } else if (t.is_double()){ | |
| 116 st->print("double %lf)", double_initial_value()); | |
| 117 } | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 void fieldDescriptor::print_on_for(outputStream* st, oop obj) { | |
| 122 print_on(st); | |
| 123 BasicType ft = field_type(); | |
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124 jint as_int = 0; |
| 0 | 125 switch (ft) { |
| 126 case T_BYTE: | |
| 127 as_int = (jint)obj->byte_field(offset()); | |
| 128 st->print(" %d", obj->byte_field(offset())); | |
| 129 break; | |
| 130 case T_CHAR: | |
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131 as_int = (jint)obj->char_field(offset()); |
| 0 | 132 { |
| 133 jchar c = obj->char_field(offset()); | |
| 134 as_int = c; | |
| 135 st->print(" %c %d", isprint(c) ? c : ' ', c); | |
| 136 } | |
| 137 break; | |
| 138 case T_DOUBLE: | |
| 139 st->print(" %lf", obj->double_field(offset())); | |
| 140 break; | |
| 141 case T_FLOAT: | |
| 142 as_int = obj->int_field(offset()); | |
| 143 st->print(" %f", obj->float_field(offset())); | |
| 144 break; | |
| 145 case T_INT: | |
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146 as_int = obj->int_field(offset()); |
| 0 | 147 st->print(" %d", obj->int_field(offset())); |
| 148 break; | |
| 149 case T_LONG: | |
| 150 st->print(" "); | |
| 151 st->print_jlong(obj->long_field(offset())); | |
| 152 break; | |
| 153 case T_SHORT: | |
| 154 as_int = obj->short_field(offset()); | |
| 155 st->print(" %d", obj->short_field(offset())); | |
| 156 break; | |
| 157 case T_BOOLEAN: | |
| 158 as_int = obj->bool_field(offset()); | |
| 159 st->print(" %s", obj->bool_field(offset()) ? "true" : "false"); | |
| 160 break; | |
| 161 case T_ARRAY: | |
| 162 st->print(" "); | |
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163 NOT_LP64(as_int = obj->int_field(offset())); |
| 0 | 164 obj->obj_field(offset())->print_value_on(st); |
| 165 break; | |
| 166 case T_OBJECT: | |
| 167 st->print(" "); | |
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168 NOT_LP64(as_int = obj->int_field(offset())); |
| 0 | 169 obj->obj_field(offset())->print_value_on(st); |
| 170 break; | |
| 171 default: | |
| 172 ShouldNotReachHere(); | |
| 173 break; | |
| 174 } | |
| 175 // Print a hint as to the underlying integer representation. This can be wrong for | |
| 176 // pointers on an LP64 machine | |
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177 if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) { |
| 0 | 178 st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint))); |
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179 } else if (as_int < 0 || as_int > 9) { |
| 0 | 180 st->print(" (%x)", as_int); |
| 181 } | |
| 182 } | |
| 183 | |
| 184 #endif /* PRODUCT */ |