1 /* 2 * Copyright (c) 2016, 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 "ci/ciField.hpp" 26 #include "ci/ciValueKlass.hpp" 27 #include "oops/valueKlass.hpp" 28 29 // Number of value type factory parameters 30 int ciValueKlass::param_count() const { 31 VM_ENTRY_MARK 32 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 33 methodHandle factory_h(vklass_h->factory_method()); 34 int count = factory_h->constMethod()->valuefactory_parameter_mapping_length(); 35 return count; 36 } 37 38 // Size of value type factory parameters in words 39 int ciValueKlass::param_size() { 40 int size = 0; 41 for (int i = 0; i < nof_declared_nonstatic_fields(); ++i) { 42 size += get_field_type_by_index(i)->size(); 43 } 44 return size; 45 } 46 47 int ciValueKlass::field_index_for_argument(int argument) { 48 VM_ENTRY_MARK 49 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 50 methodHandle factory_h(vklass_h->factory_method()); 51 return factory_h->constMethod()->valuefactory_parameter_mapping_start()[argument].data.field_index; 52 } 53 54 // Returns the value factory parameter index of the field with the given offset. 55 // If the field at 'offset' belongs to a flattened value type field, return the 56 // index of the ValueType parameter corresponding to this flattened value type. 57 int ciValueKlass::get_field_index_by_offset(int offset) { 58 assert(contains_field_offset(offset), "invalid field offset"); 59 int best_offset = 0; 60 int best_index = -1; 61 // Search the field with the given offset 62 for (int i = 0; i < nof_declared_nonstatic_fields(); ++i) { 63 int field_offset = get_field_offset_by_index(i); 64 if (field_offset == offset) { 65 // Exact match 66 return i; 67 } else if (field_offset < offset && field_offset > best_offset) { 68 // No exact match. Save the index of the field with the closest offset that 69 // is smaller than the given field offset. This index corresponds to the 70 // flattened value type field that holds the field we are looking for. 71 best_offset = field_offset; 72 best_index = i; 73 } 74 } 75 assert(best_index >= 0, "field not found"); 76 assert(best_offset == offset || get_field_type_by_index(best_index)->is_valuetype(), "offset should match for non-VTs"); 77 return best_index; 78 } 79 80 // Returns the field offset of the value factory parameter with the given index 81 int ciValueKlass::get_field_offset_by_index(int index) const { 82 // Compute the field index from the factory parameter index 83 GUARDED_VM_ENTRY( 84 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 85 return vklass_h->field_offset(index); 86 ) 87 } 88 89 // Returns the field type of the field with the given index 90 ciType* ciValueKlass::get_field_type_by_index(int index) { 91 VM_ENTRY_MARK 92 int offset = get_field_offset_by_index(index); 93 return get_field_type_by_offset(offset); 94 } 95 96 // Offset of the first field in the value type 97 int ciValueKlass::get_first_field_offset() const { 98 GUARDED_VM_ENTRY( 99 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 100 return vklass_h()->first_field_offset(); 101 ) 102 }