1 /* 2 * Copyright (c) 1999, 2017, 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/ciArrayKlass.hpp" 27 #include "ci/ciObjArrayKlass.hpp" 28 #include "ci/ciTypeArrayKlass.hpp" 29 #include "ci/ciUtilities.hpp" 30 #include "ci/ciUtilities.inline.hpp" 31 #include "ci/ciValueArrayKlass.hpp" 32 #include "ci/ciValueKlass.hpp" 33 34 // ciArrayKlass 35 // 36 // This class represents a Klass* in the HotSpot virtual machine 37 // whose Klass part in an ArrayKlass. 38 39 // ------------------------------------------------------------------ 40 // ciArrayKlass::ciArrayKlass 41 // 42 // Loaded array klass. 43 ciArrayKlass::ciArrayKlass(Klass* k) : ciKlass(k) { 44 assert(get_Klass()->is_array_klass(), "wrong type"); 45 _dimension = get_ArrayKlass()->dimension(); 46 } 47 48 // ------------------------------------------------------------------ 49 // ciArrayKlass::ciArrayKlass 50 // 51 // Unloaded array klass. 52 ciArrayKlass::ciArrayKlass(ciSymbol* name, int dimension, BasicType bt) 53 : ciKlass(name, bt) { 54 _dimension = dimension; 55 } 56 57 // ------------------------------------------------------------------ 58 // ciArrayKlass::element_type 59 // 60 // What type is obtained when this array is indexed once? 61 ciType* ciArrayKlass::element_type() { 62 if (is_type_array_klass()) { 63 return ciType::make(as_type_array_klass()->element_type()); 64 } else { 65 return element_klass()->as_klass(); 66 } 67 } 68 69 70 // ------------------------------------------------------------------ 71 // ciArrayKlass::base_element_type 72 // 73 // What type is obtained when this array is indexed as many times as possible? 74 ciType* ciArrayKlass::base_element_type() { 75 if (is_type_array_klass()) { 76 return ciType::make(as_type_array_klass()->element_type()); 77 } else if (is_obj_array_klass()) { 78 ciKlass* ek = as_obj_array_klass()->base_element_klass(); 79 if (ek->is_type_array_klass()) { 80 return ciType::make(ek->as_type_array_klass()->element_type()); 81 } 82 return ek; 83 } else { 84 return as_value_array_klass()->base_element_klass(); 85 } 86 } 87 88 89 // ------------------------------------------------------------------ 90 // ciArrayKlass::is_leaf_type 91 bool ciArrayKlass::is_leaf_type() { 92 if (is_type_array_klass()) { 93 return true; 94 } else { 95 return as_obj_array_klass()->base_element_klass()->is_leaf_type(); 96 } 97 } 98 99 100 // ------------------------------------------------------------------ 101 // ciArrayKlass::base_element_type 102 // 103 // What type is obtained when this array is indexed as many times as possible? 104 ciArrayKlass* ciArrayKlass::make(ciType* element_type, bool never_null) { 105 if (element_type->is_primitive_type()) { 106 return ciTypeArrayKlass::make(element_type->basic_type()); 107 } else if (element_type->is_valuetype() && element_type->as_value_klass()->flatten_array() && never_null) { 108 return ciValueArrayKlass::make(element_type->as_klass()); 109 } else { 110 return ciObjArrayKlass::make(element_type->as_klass(), never_null); 111 } 112 } 113 114 int ciArrayKlass::array_header_in_bytes() { 115 return get_ArrayKlass()->array_header_in_bytes(); 116 } 117 118 ArrayStorageProperties ciArrayKlass::storage_properties() { 119 return get_ArrayKlass()->storage_properties(); 120 } 121 122 ciInstance* ciArrayKlass::component_mirror_instance() const { 123 GUARDED_VM_ENTRY( 124 oop component_mirror = ArrayKlass::cast(get_Klass())->component_mirror(); 125 return CURRENT_ENV->get_instance(component_mirror); 126 ) 127 }