1 /* 2 * Copyright (c) 2000, 2015, 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 "ci/ciEnv.hpp" 27 #include "ci/ciType.hpp" 28 #include "ci/ciUtilities.hpp" 29 #include "classfile/systemDictionary.hpp" 30 #include "oops/oop.inline.hpp" 31 32 ciType* ciType::_basic_types[T_CONFLICT+1]; 33 34 // ciType 35 // 36 // This class represents either a class (T_OBJECT), array (T_ARRAY), 37 // or one of the primitive types such as T_INT. 38 39 // ------------------------------------------------------------------ 40 // ciType::ciType 41 // 42 ciType::ciType(BasicType basic_type) : ciMetadata() { 43 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check"); 44 _basic_type = basic_type; 45 } 46 47 ciType::ciType(KlassHandle k) : ciMetadata(k()) { 48 _basic_type = k()->is_array_klass() ? T_ARRAY : T_OBJECT; 49 } 50 51 52 // ------------------------------------------------------------------ 53 // ciType::is_subtype_of 54 // 55 bool ciType::is_subtype_of(ciType* type) { 56 if (this == type) return true; 57 if (is_klass() && type->is_klass()) 58 return this->as_klass()->is_subtype_of(type->as_klass()); 59 return false; 60 } 61 62 // ------------------------------------------------------------------ 63 // ciType::name 64 // 65 // Return the name of this type 66 const char* ciType::name() { 67 if (is_primitive_type()) { 68 return type2name(basic_type()); 69 } else { 70 assert(is_klass(), "must be"); 71 return as_klass()->name()->as_utf8(); 72 } 73 } 74 75 // ------------------------------------------------------------------ 76 // ciType::print_impl 77 // 78 // Implementation of the print method. 79 void ciType::print_impl(outputStream* st) { 80 st->print(" type="); 81 print_name_on(st); 82 } 83 84 // ------------------------------------------------------------------ 85 // ciType::print_name 86 // 87 // Print the name of this type 88 void ciType::print_name_on(outputStream* st) { 89 ResourceMark rm; 90 st->print("%s", name()); 91 } 92 93 94 95 // ------------------------------------------------------------------ 96 // ciType::java_mirror 97 // 98 ciInstance* ciType::java_mirror() { 99 VM_ENTRY_MARK; 100 return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type())); 101 } 102 103 // ------------------------------------------------------------------ 104 // ciType::box_klass 105 // 106 ciKlass* ciType::box_klass() { 107 if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing" 108 109 // Void is "boxed" with a null. 110 if (basic_type() == T_VOID) return NULL; 111 112 VM_ENTRY_MARK; 113 return CURRENT_THREAD_ENV->get_instance_klass(SystemDictionary::box_klass(basic_type())); 114 } 115 116 117 // ------------------------------------------------------------------ 118 // ciType::make 119 // 120 // Produce the ciType for a given primitive BasicType. 121 // As a bonus, produce the right reference type for T_OBJECT. 122 // Does not work on T_ARRAY. 123 ciType* ciType::make(BasicType t) { 124 // short, etc. 125 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address. 126 assert((uint)t < T_CONFLICT+1, "range check"); 127 if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object 128 assert(_basic_types[t] != NULL, "domain check"); 129 return _basic_types[t]; 130 } 131 132 // ciReturnAddress 133 // 134 // This class represents the type of a specific return address in the 135 // bytecodes. 136 137 // ------------------------------------------------------------------ 138 // ciReturnAddress::ciReturnAddress 139 // 140 ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) { 141 assert(0 <= bci, "bci cannot be negative"); 142 _bci = bci; 143 } 144 145 // ------------------------------------------------------------------ 146 // ciReturnAddress::print_impl 147 // 148 // Implementation of the print method. 149 void ciReturnAddress::print_impl(outputStream* st) { 150 st->print(" bci=%d", _bci); 151 } 152 153 // ------------------------------------------------------------------ 154 // ciReturnAddress::make 155 ciReturnAddress* ciReturnAddress::make(int bci) { 156 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);) 157 }