1 /* 2 * Copyright (c) 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 #ifndef SHARE_VM_CI_CIVALUEKLASS_HPP 26 #define SHARE_VM_CI_CIVALUEKLASS_HPP 27 28 #include "ci/ciConstantPoolCache.hpp" 29 #include "ci/ciEnv.hpp" 30 #include "ci/ciFlags.hpp" 31 #include "ci/ciInstanceKlass.hpp" 32 #include "ci/ciSymbol.hpp" 33 #include "oops/valueKlass.hpp" 34 35 // ciValueKlass 36 // 37 // Specialized ciInstanceKlass for value types. 38 class ciValueKlass : public ciInstanceKlass { 39 CI_PACKAGE_ACCESS 40 41 private: 42 // Fields declared in the bytecode (without flattened value type fields) 43 GrowableArray<ciField*>* _declared_nonstatic_fields; 44 45 protected: 46 ciValueKlass(Klass* h_k) : ciInstanceKlass(h_k), _declared_nonstatic_fields(NULL) { 47 assert(is_final(), "ValueKlass must be final"); 48 }; 49 50 ciValueKlass(ciSymbol* name, jobject loader, jobject protection_domain) : 51 ciInstanceKlass(name, loader, protection_domain, T_VALUETYPE) {} 52 53 int compute_nonstatic_fields(); 54 const char* type_string() { return "ciValueKlass"; } 55 56 public: 57 bool is_valuetype() const { return true; } 58 59 int nof_declared_nonstatic_fields() { 60 if (_declared_nonstatic_fields == NULL) { 61 compute_nonstatic_fields(); 62 } 63 return _declared_nonstatic_fields->length(); 64 } 65 66 // ith non-static declared field (presented by ascending address) 67 ciField* declared_nonstatic_field_at(int i) { 68 assert(_declared_nonstatic_fields != NULL, "should be initialized"); 69 return _declared_nonstatic_fields->at(i); 70 } 71 72 // Value type fields 73 int first_field_offset() const; 74 int field_index_by_offset(int offset); 75 76 bool flatten_array() const; 77 bool can_be_returned_as_fields() const; 78 bool is_scalarizable() const; 79 int value_arg_slots(); 80 int default_value_offset() const; 81 ciInstance* default_value_instance() const; 82 bool contains_oops() const; 83 Array<SigEntry>* extended_sig() const; 84 }; 85 86 #endif // SHARE_VM_CI_CIVALUEKLASS_HPP