Mercurial > hg > graal-compiler
view src/share/vm/oops/fieldInfo.hpp @ 6494:df02fa2bce58
refactored all AMD64 specific HotSpot code in com.oracle.graal.hotspot.target.amd64 package
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 03 Oct 2012 00:25:30 +0200 |
parents | 71afdabfd05b |
children | da91efe96a93 |
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/* * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_OOPS_FIELDINFO_HPP #define SHARE_VM_OOPS_FIELDINFO_HPP #include "oops/typeArrayOop.hpp" #include "classfile/vmSymbols.hpp" // This class represents the field information contained in the fields // array of an instanceKlass. Currently it's laid on top an array of // Java shorts but in the future it could simply be used as a real // array type. FieldInfo generally shouldn't be used directly. // Fields should be queried either through instanceKlass or through // the various FieldStreams. class FieldInfo VALUE_OBJ_CLASS_SPEC { friend class fieldDescriptor; friend class JavaFieldStream; friend class ClassFileParser; public: // fields // Field info extracted from the class file and stored // as an array of 7 shorts enum FieldOffset { access_flags_offset = 0, name_index_offset = 1, signature_index_offset = 2, initval_index_offset = 3, low_offset = 4, high_offset = 5, field_slots = 6 }; private: u2 _shorts[field_slots]; void set_name_index(u2 val) { _shorts[name_index_offset] = val; } void set_signature_index(u2 val) { _shorts[signature_index_offset] = val; } void set_initval_index(u2 val) { _shorts[initval_index_offset] = val; } u2 name_index() const { return _shorts[name_index_offset]; } u2 signature_index() const { return _shorts[signature_index_offset]; } u2 initval_index() const { return _shorts[initval_index_offset]; } public: static FieldInfo* from_field_array(typeArrayOop fields, int index) { return ((FieldInfo*)fields->short_at_addr(index * field_slots)); } static FieldInfo* from_field_array(u2* fields, int index) { return ((FieldInfo*)(fields + index * field_slots)); } void initialize(u2 access_flags, u2 name_index, u2 signature_index, u2 initval_index, u4 offset) { _shorts[access_flags_offset] = access_flags; _shorts[name_index_offset] = name_index; _shorts[signature_index_offset] = signature_index; _shorts[initval_index_offset] = initval_index; set_offset(offset); } u2 access_flags() const { return _shorts[access_flags_offset]; } u4 offset() const { return build_int_from_shorts(_shorts[low_offset], _shorts[high_offset]); } Symbol* name(constantPoolHandle cp) const { int index = name_index(); if (is_internal()) { return lookup_symbol(index); } return cp->symbol_at(index); } Symbol* signature(constantPoolHandle cp) const { int index = signature_index(); if (is_internal()) { return lookup_symbol(index); } return cp->symbol_at(index); } void set_access_flags(u2 val) { _shorts[access_flags_offset] = val; } void set_offset(u4 val) { _shorts[low_offset] = extract_low_short_from_int(val); _shorts[high_offset] = extract_high_short_from_int(val); } bool is_internal() const { return (access_flags() & JVM_ACC_FIELD_INTERNAL) != 0; } Symbol* lookup_symbol(int symbol_index) const { assert(is_internal(), "only internal fields"); return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); } }; #endif // SHARE_VM_OOPS_FIELDINFO_HPP