ciType.cpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 2000, 2002, 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 "incls/_precompiled.incl" 26#include "incls/_ciType.cpp.incl" 27 28ciType* ciType::_basic_types[T_CONFLICT+1]; 29 30// ciType 31// 32// This class represents either a class (T_OBJECT), array (T_ARRAY), 33// or one of the primitive types such as T_INT. 34 35// ------------------------------------------------------------------ 36// ciType::ciType 37// 38ciType::ciType(BasicType basic_type) : ciObject() { 39 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check"); 40 assert(basic_type != T_OBJECT && basic_type != T_ARRAY, "not a reference type"); 41 _basic_type = basic_type; 42} 43 44ciType::ciType(KlassHandle k) : ciObject(k) { 45 _basic_type = Klass::cast(k())->oop_is_array() ? T_ARRAY : T_OBJECT; 46} 47 48ciType::ciType(ciKlass* klass) : ciObject(klass) { 49 _basic_type = klass->is_array_klass_klass() ? T_ARRAY : T_OBJECT; 50} 51 52 53// ------------------------------------------------------------------ 54// ciType::is_subtype_of 55// 56bool ciType::is_subtype_of(ciType* type) { 57 if (this == type) return true; 58 if (is_klass() && type->is_klass()) 59 return this->as_klass()->is_subtype_of(type->as_klass()); 60 return false; 61} 62 63// ------------------------------------------------------------------ 64// ciType::print_impl 65// 66// Implementation of the print method. 67void ciType::print_impl(outputStream* st) { 68 st->print(" type="); 69 print_name_on(st); 70} 71 72// ------------------------------------------------------------------ 73// ciType::print_name 74// 75// Print the name of this type 76void ciType::print_name_on(outputStream* st) { 77 st->print(type2name(basic_type())); 78} 79 80 81 82// ------------------------------------------------------------------ 83// ciType::java_mirror 84// 85ciInstance* ciType::java_mirror() { 86 VM_ENTRY_MARK; 87 return CURRENT_THREAD_ENV->get_object(Universe::java_mirror(basic_type()))->as_instance(); 88} 89 90// ------------------------------------------------------------------ 91// ciType::box_klass 92// 93ciKlass* ciType::box_klass() { 94 if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing" 95 96 // Void is "boxed" with a null. 97 if (basic_type() == T_VOID) return NULL; 98 99 VM_ENTRY_MARK; 100 return CURRENT_THREAD_ENV->get_object(SystemDictionary::box_klass(basic_type()))->as_instance_klass(); 101} 102 103 104// ------------------------------------------------------------------ 105// ciType::make 106// 107// Produce the ciType for a given primitive BasicType. 108// As a bonus, produce the right reference type for T_OBJECT. 109// Does not work on T_ARRAY. 110ciType* ciType::make(BasicType t) { 111 // short, etc. 112 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address. 113 assert((uint)t < T_CONFLICT+1, "range check"); 114 if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object 115 assert(_basic_types[t] != NULL, "domain check"); 116 return _basic_types[t]; 117} 118 119// ciReturnAddress 120// 121// This class represents the type of a specific return address in the 122// bytecodes. 123 124// ------------------------------------------------------------------ 125// ciReturnAddress::ciReturnAddress 126// 127ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) { 128 assert(0 <= bci, "bci cannot be negative"); 129 _bci = bci; 130} 131 132// ------------------------------------------------------------------ 133// ciReturnAddress::print_impl 134// 135// Implementation of the print method. 136void ciReturnAddress::print_impl(outputStream* st) { 137 st->print(" bci=%d", _bci); 138} 139 140// ------------------------------------------------------------------ 141// ciReturnAddress::make 142ciReturnAddress* ciReturnAddress::make(int bci) { 143 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);) 144} 145