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 #ifndef SHARE_VM_CI_CIVALUEKLASS_HPP 26 #define SHARE_VM_CI_CIVALUEKLASS_HPP 27 28 #include "ci/ciConstantPoolCache.hpp" 29 #include "ci/ciFlags.hpp" 30 #include "ci/ciInstanceKlass.hpp" 31 #include "ci/ciSymbol.hpp" 32 33 // ciValueKlass 34 // 35 // Specialized ciInstanceKlass for value types. 36 class ciValueKlass : public ciInstanceKlass { 37 CI_PACKAGE_ACCESS 38 39 private: 40 // Index fields of a value type, indeces range from 0 to the number of fields of the 41 // value type - 1. 42 // For each index constructed, _field_index_map records the field's index 43 // in InstanceKlass::_fields (i.e., _field_index_map records the value returned by 44 // fieldDescriptor::index() for each field). 45 GrowableArray<int>* _field_index_map; 46 47 protected: 48 ciValueKlass(Klass* h_k) : ciInstanceKlass(h_k), _field_index_map(NULL) { 49 assert(is_final(), "ValueKlass must be final"); 50 }; 51 52 const char* type_string() { return "ciValueKlass"; } 53 int compute_field_index_map(); 54 55 public: 56 bool is_valuetype() const { return true; } 57 bool flatten_array() const; 58 bool contains_oops() const; 59 60 // Value type fields 61 int field_count(); 62 int field_size(); 63 int flattened_field_count() { 64 return nof_nonstatic_fields(); 65 } 66 int field_index_by_offset(int offset); 67 int field_offset_by_index(int index); 68 ciType* field_type_by_index(int index); 69 int first_field_offset() const; 70 71 int value_arg_slots(); 72 }; 73 74 #endif // SHARE_VM_CI_CIVALUEKLASS_HPP