1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/ci/ciType.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,157 @@
1.4 +/*
1.5 + * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "ci/ciEnv.hpp"
1.30 +#include "ci/ciType.hpp"
1.31 +#include "ci/ciUtilities.hpp"
1.32 +#include "classfile/systemDictionary.hpp"
1.33 +#include "oops/oop.inline.hpp"
1.34 +
1.35 +ciType* ciType::_basic_types[T_CONFLICT+1];
1.36 +
1.37 +// ciType
1.38 +//
1.39 +// This class represents either a class (T_OBJECT), array (T_ARRAY),
1.40 +// or one of the primitive types such as T_INT.
1.41 +
1.42 +// ------------------------------------------------------------------
1.43 +// ciType::ciType
1.44 +//
1.45 +ciType::ciType(BasicType basic_type) : ciMetadata() {
1.46 + assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
1.47 + _basic_type = basic_type;
1.48 +}
1.49 +
1.50 +ciType::ciType(KlassHandle k) : ciMetadata(k()) {
1.51 + _basic_type = k()->oop_is_array() ? T_ARRAY : T_OBJECT;
1.52 +}
1.53 +
1.54 +
1.55 +// ------------------------------------------------------------------
1.56 +// ciType::is_subtype_of
1.57 +//
1.58 +bool ciType::is_subtype_of(ciType* type) {
1.59 + if (this == type) return true;
1.60 + if (is_klass() && type->is_klass())
1.61 + return this->as_klass()->is_subtype_of(type->as_klass());
1.62 + return false;
1.63 +}
1.64 +
1.65 +// ------------------------------------------------------------------
1.66 +// ciType::name
1.67 +//
1.68 +// Return the name of this type
1.69 +const char* ciType::name() {
1.70 + if (is_primitive_type()) {
1.71 + return type2name(basic_type());
1.72 + } else {
1.73 + assert(is_klass(), "must be");
1.74 + return as_klass()->name()->as_utf8();
1.75 + }
1.76 +}
1.77 +
1.78 +// ------------------------------------------------------------------
1.79 +// ciType::print_impl
1.80 +//
1.81 +// Implementation of the print method.
1.82 +void ciType::print_impl(outputStream* st) {
1.83 + st->print(" type=");
1.84 + print_name_on(st);
1.85 +}
1.86 +
1.87 +// ------------------------------------------------------------------
1.88 +// ciType::print_name
1.89 +//
1.90 +// Print the name of this type
1.91 +void ciType::print_name_on(outputStream* st) {
1.92 + ResourceMark rm;
1.93 + st->print("%s", name());
1.94 +}
1.95 +
1.96 +
1.97 +
1.98 +// ------------------------------------------------------------------
1.99 +// ciType::java_mirror
1.100 +//
1.101 +ciInstance* ciType::java_mirror() {
1.102 + VM_ENTRY_MARK;
1.103 + return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type()));
1.104 +}
1.105 +
1.106 +// ------------------------------------------------------------------
1.107 +// ciType::box_klass
1.108 +//
1.109 +ciKlass* ciType::box_klass() {
1.110 + if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing"
1.111 +
1.112 + // Void is "boxed" with a null.
1.113 + if (basic_type() == T_VOID) return NULL;
1.114 +
1.115 + VM_ENTRY_MARK;
1.116 + return CURRENT_THREAD_ENV->get_instance_klass(SystemDictionary::box_klass(basic_type()));
1.117 +}
1.118 +
1.119 +
1.120 +// ------------------------------------------------------------------
1.121 +// ciType::make
1.122 +//
1.123 +// Produce the ciType for a given primitive BasicType.
1.124 +// As a bonus, produce the right reference type for T_OBJECT.
1.125 +// Does not work on T_ARRAY.
1.126 +ciType* ciType::make(BasicType t) {
1.127 + // short, etc.
1.128 + // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
1.129 + assert((uint)t < T_CONFLICT+1, "range check");
1.130 + if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object
1.131 + assert(_basic_types[t] != NULL, "domain check");
1.132 + return _basic_types[t];
1.133 +}
1.134 +
1.135 +// ciReturnAddress
1.136 +//
1.137 +// This class represents the type of a specific return address in the
1.138 +// bytecodes.
1.139 +
1.140 +// ------------------------------------------------------------------
1.141 +// ciReturnAddress::ciReturnAddress
1.142 +//
1.143 +ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
1.144 + assert(0 <= bci, "bci cannot be negative");
1.145 + _bci = bci;
1.146 +}
1.147 +
1.148 +// ------------------------------------------------------------------
1.149 +// ciReturnAddress::print_impl
1.150 +//
1.151 +// Implementation of the print method.
1.152 +void ciReturnAddress::print_impl(outputStream* st) {
1.153 + st->print(" bci=%d", _bci);
1.154 +}
1.155 +
1.156 +// ------------------------------------------------------------------
1.157 +// ciReturnAddress::make
1.158 +ciReturnAddress* ciReturnAddress::make(int bci) {
1.159 + GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
1.160 +}
