1 /* 2 * Copyright (c) 2017, 2019, 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/ciField.hpp" 27 #include "ci/ciInlineKlass.hpp" 28 #include "ci/ciUtilities.inline.hpp" 29 #include "oops/inlineKlass.inline.hpp" 30 31 int ciInlineKlass::compute_nonstatic_fields() { 32 int result = ciInstanceKlass::compute_nonstatic_fields(); 33 assert(super() == NULL || !super()->has_nonstatic_fields(), "an inline type must not inherit fields from its superclass"); 34 35 // Compute declared non-static fields (without flattening of inline type fields) 36 GrowableArray<ciField*>* fields = NULL; 37 GUARDED_VM_ENTRY(fields = compute_nonstatic_fields_impl(NULL, false /* no flattening */);) 38 Arena* arena = CURRENT_ENV->arena(); 39 _declared_nonstatic_fields = (fields != NULL) ? fields : new (arena) GrowableArray<ciField*>(arena, 0, 0, 0); 40 return result; 41 } 42 43 // Offset of the first field in the inline type 44 int ciInlineKlass::first_field_offset() const { 45 GUARDED_VM_ENTRY(return to_InlineKlass()->first_field_offset();) 46 } 47 48 // Returns the index of the field with the given offset. If the field at 'offset' 49 // belongs to a flattened inline type field, return the index of the field 50 // in the flattened inline type. 51 int ciInlineKlass::field_index_by_offset(int offset) { 52 assert(contains_field_offset(offset), "invalid field offset"); 53 int best_offset = 0; 54 int best_index = -1; 55 // Search the field with the given offset 56 for (int i = 0; i < nof_declared_nonstatic_fields(); ++i) { 57 int field_offset = _declared_nonstatic_fields->at(i)->offset(); 58 if (field_offset == offset) { 59 // Exact match 60 return i; 61 } else if (field_offset < offset && field_offset > best_offset) { 62 // No exact match. Save the index of the field with the closest offset that 63 // is smaller than the given field offset. This index corresponds to the 64 // flattened inline type field that holds the field we are looking for. 65 best_offset = field_offset; 66 best_index = i; 67 } 68 } 69 assert(best_index >= 0, "field not found"); 70 assert(best_offset == offset || _declared_nonstatic_fields->at(best_index)->type()->is_inlinetype(), "offset should match for non-inline types"); 71 return best_index; 72 } 73 74 // Are arrays containing this inline type flattened? 75 bool ciInlineKlass::flatten_array() const { 76 GUARDED_VM_ENTRY(return to_InlineKlass()->flatten_array();) 77 } 78 79 // Can this inline type be passed as multiple values? 80 bool ciInlineKlass::can_be_passed_as_fields() const { 81 GUARDED_VM_ENTRY(return to_InlineKlass()->can_be_passed_as_fields();) 82 } 83 84 // Can this inline type be returned as multiple values? 85 bool ciInlineKlass::can_be_returned_as_fields() const { 86 GUARDED_VM_ENTRY(return to_InlineKlass()->can_be_returned_as_fields();) 87 } 88 89 bool ciInlineKlass::is_empty() { 90 // Do not use InlineKlass::is_empty_inline_type here because it does 91 // consider the container empty even if fields of empty inline types 92 // are not flattened 93 return nof_nonstatic_fields() == 0; 94 } 95 96 // When passing an inline type's fields as arguments, count the number 97 // of argument slots that are needed 98 int ciInlineKlass::inline_arg_slots() { 99 int slots = 0; 100 for (int j = 0; j < nof_nonstatic_fields(); j++) { 101 ciField* field = nonstatic_field_at(j); 102 slots += type2size[field->type()->basic_type()]; 103 } 104 return slots; 105 } 106 107 // Offset of the default oop in the mirror 108 int ciInlineKlass::default_value_offset() const { 109 GUARDED_VM_ENTRY(return to_InlineKlass()->default_value_offset();) 110 } 111 112 ciInstance* ciInlineKlass::default_instance() const { 113 GUARDED_VM_ENTRY( 114 oop default_value = to_InlineKlass()->default_value(); 115 return CURRENT_ENV->get_instance(default_value); 116 ) 117 } 118 119 ciInstance* ciInlineKlass::ref_instance() const { 120 GUARDED_VM_ENTRY( 121 oop ref_mirror = to_InlineKlass()->ref_mirror(); 122 return CURRENT_ENV->get_instance(ref_mirror); 123 ) 124 } 125 126 ciInstance* ciInlineKlass::val_instance() const { 127 GUARDED_VM_ENTRY( 128 oop val_mirror = to_InlineKlass()->val_mirror(); 129 return CURRENT_ENV->get_instance(val_mirror); 130 ) 131 } 132 133 bool ciInlineKlass::contains_oops() const { 134 GUARDED_VM_ENTRY(return get_InlineKlass()->contains_oops();) 135 } 136 137 int ciInlineKlass::oop_count() const { 138 GUARDED_VM_ENTRY(return get_InlineKlass()->nonstatic_oop_count();) 139 } 140 141 address ciInlineKlass::pack_handler() const { 142 GUARDED_VM_ENTRY(return get_InlineKlass()->pack_handler();) 143 } 144 145 address ciInlineKlass::unpack_handler() const { 146 GUARDED_VM_ENTRY(return get_InlineKlass()->unpack_handler();) 147 } 148 149 InlineKlass* ciInlineKlass::get_InlineKlass() const { 150 GUARDED_VM_ENTRY(return to_InlineKlass();) 151 } 152 153 ciInstance* ciInlineKlass::ref_mirror() { 154 GUARDED_VM_ENTRY(return CURRENT_ENV->get_instance(to_InlineKlass()->ref_mirror());) 155 } 156 157 ciInstance* ciInlineKlass::val_mirror() { 158 GUARDED_VM_ENTRY(return CURRENT_ENV->get_instance(to_InlineKlass()->val_mirror());) 159 }