ciType.cpp revision 3602:da91efe96a93
1/* 2 * Copyright (c) 2000, 2012, 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 32ciType* 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// 42ciType::ciType(BasicType basic_type) : ciMetadata() { 43 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check"); 44 _basic_type = basic_type; 45} 46 47ciType::ciType(KlassHandle k) : ciMetadata(k()) { 48 _basic_type = Klass::cast(k())->oop_is_array() ? T_ARRAY : T_OBJECT; 49} 50 51 52// ------------------------------------------------------------------ 53// ciType::is_subtype_of 54// 55bool 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::print_impl 64// 65// Implementation of the print method. 66void ciType::print_impl(outputStream* st) { 67 st->print(" type="); 68 print_name_on(st); 69} 70 71// ------------------------------------------------------------------ 72// ciType::print_name 73// 74// Print the name of this type 75void ciType::print_name_on(outputStream* st) { 76 st->print(type2name(basic_type())); 77} 78 79 80 81// ------------------------------------------------------------------ 82// ciType::java_mirror 83// 84ciInstance* ciType::java_mirror() { 85 VM_ENTRY_MARK; 86 return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type())); 87} 88 89// ------------------------------------------------------------------ 90// ciType::box_klass 91// 92ciKlass* ciType::box_klass() { 93 if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing" 94 95 // Void is "boxed" with a null. 96 if (basic_type() == T_VOID) return NULL; 97 98 VM_ENTRY_MARK; 99 return CURRENT_THREAD_ENV->get_instance_klass(SystemDictionary::box_klass(basic_type())); 100} 101 102 103// ------------------------------------------------------------------ 104// ciType::make 105// 106// Produce the ciType for a given primitive BasicType. 107// As a bonus, produce the right reference type for T_OBJECT. 108// Does not work on T_ARRAY. 109ciType* ciType::make(BasicType t) { 110 // short, etc. 111 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address. 112 assert((uint)t < T_CONFLICT+1, "range check"); 113 if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object 114 assert(_basic_types[t] != NULL, "domain check"); 115 return _basic_types[t]; 116} 117 118// ciReturnAddress 119// 120// This class represents the type of a specific return address in the 121// bytecodes. 122 123// ------------------------------------------------------------------ 124// ciReturnAddress::ciReturnAddress 125// 126ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) { 127 assert(0 <= bci, "bci cannot be negative"); 128 _bci = bci; 129} 130 131// ------------------------------------------------------------------ 132// ciReturnAddress::print_impl 133// 134// Implementation of the print method. 135void ciReturnAddress::print_impl(outputStream* st) { 136 st->print(" bci=%d", _bci); 137} 138 139// ------------------------------------------------------------------ 140// ciReturnAddress::make 141ciReturnAddress* ciReturnAddress::make(int bci) { 142 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);) 143} 144