1 /*
2 * Copyright (c) 2000, 2023, 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/ciEnv.hpp"
27 #include "ci/ciType.hpp"
28 #include "ci/ciUtilities.inline.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "memory/universe.hpp"
31 #include "oops/oop.inline.hpp"
32
33 ciType* ciType::_basic_types[T_CONFLICT+1];
34
35 // ciType
36 //
37 // This class represents a Java reference or primitive type.
38
39 // ------------------------------------------------------------------
40 // ciType::ciType
41 //
42 ciType::ciType(BasicType basic_type) : ciMetadata() {
43 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
44 _basic_type = basic_type;
45 }
46
47 ciType::ciType(Klass* k) : ciMetadata(k) {
48 _basic_type = k->is_array_klass() ? T_ARRAY : T_OBJECT;
49 }
50
51
52 // ------------------------------------------------------------------
53 // ciType::is_subtype_of
54 //
55 bool ciType::is_subtype_of(ciType* type) {
56 if (this == type) return true;
57 if (is_klass() && type->is_klass())
58 return this->as_klass()->is_subtype_of(type->as_klass());
59 return false;
60 }
61
62 // ------------------------------------------------------------------
63 // ciType::name
64 //
65 // Return the name of this type
66 const char* ciType::name() {
67 if (is_primitive_type()) {
68 return type2name(basic_type());
69 } else {
70 assert(is_klass(), "must be");
71 return as_klass()->name()->as_utf8();
72 }
73 }
74
75 // ------------------------------------------------------------------
76 // ciType::print_impl
77 //
78 // Implementation of the print method.
79 void ciType::print_impl(outputStream* st) {
80 st->print(" type=");
81 print_name_on(st);
82 }
83
84 // ------------------------------------------------------------------
85 // ciType::print_name
86 //
87 // Print the name of this type
88 void ciType::print_name_on(outputStream* st) {
89 ResourceMark rm;
90 st->print("%s", name());
91 }
92
93
94
95 // ------------------------------------------------------------------
96 // ciType::java_mirror
97 //
98 ciInstance* ciType::java_mirror() {
99 VM_ENTRY_MARK;
100 return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type()));
101 }
102
103 // ------------------------------------------------------------------
104 // ciType::make
105 //
106 // Produce the ciType for a given primitive BasicType.
107 // As a bonus, produce the right reference type for T_OBJECT.
108 // Does not work on T_ARRAY.
109 ciType* ciType::make(BasicType t) {
110 // short, etc.
111 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
112 assert((uint)t < T_CONFLICT+1, "range check");
113 if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object
114 assert(_basic_types[t] != nullptr, "domain check");
115 return _basic_types[t];
116 }
117
118 // ciReturnAddress
119 //
120 // This class represents the type of a specific return address in the
121 // bytecodes.
122
123 // ------------------------------------------------------------------
124 // ciReturnAddress::ciReturnAddress
125 //
126 ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
127 assert(0 <= bci, "bci cannot be negative");
128 _bci = bci;
129 }
130
131 // ------------------------------------------------------------------
132 // ciReturnAddress::print_impl
133 //
134 // Implementation of the print method.
135 void ciReturnAddress::print_impl(outputStream* st) {
136 st->print(" bci=%d", _bci);
137 }
138
139 // ------------------------------------------------------------------
140 // ciReturnAddress::make
141 ciReturnAddress* ciReturnAddress::make(int bci) {
142 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
143 }