1 /*
2 * Copyright (c) 2000, 2025, 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/ciEnv.hpp"
26 #include "ci/ciType.hpp"
27 #include "ci/ciUtilities.inline.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "memory/universe.hpp"
30 #include "oops/oop.inline.hpp"
31
32 ciType* ciType::_basic_types[T_CONFLICT+1];
33
34 // ciType
35 //
36 // This class represents a Java reference or primitive type.
37
38 // ------------------------------------------------------------------
39 // ciType::ciType
40 //
41 ciType::ciType(BasicType basic_type) : ciMetadata() {
42 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
43 _basic_type = basic_type;
44 }
45
46 ciType::ciType(Klass* k) : ciMetadata(k) {
47 _basic_type = k->is_array_klass() ? T_ARRAY : T_OBJECT;
48 }
49
50
51 // ------------------------------------------------------------------
52 // ciType::is_subtype_of
53 //
54 bool ciType::is_subtype_of(ciType* type) {
55 if (this == type) return true;
56 if (is_klass() && type->is_klass())
57 return this->as_klass()->is_subtype_of(type->as_klass());
58 return false;
59 }
60
61 // ------------------------------------------------------------------
62 // ciType::name
63 //
64 // Return the name of this type
65 const char* ciType::name() {
66 if (is_primitive_type()) {
67 return type2name(basic_type());
68 } else {
69 assert(is_klass(), "must be");
70 return as_klass()->name()->as_utf8();
71 }
72 }
73
74 // ------------------------------------------------------------------
75 // ciType::print_impl
76 //
77 // Implementation of the print method.
78 void ciType::print_impl(outputStream* st) {
79 st->print(" type=");
80 print_name_on(st);
81 }
82
83 // ------------------------------------------------------------------
84 // ciType::print_name
85 //
86 // Print the name of this type
87 void ciType::print_name_on(outputStream* st) {
88 ResourceMark rm;
89 st->print("%s", name());
90 }
91
92
93
94 // ------------------------------------------------------------------
95 // ciType::java_mirror
96 //
97 ciInstance* ciType::java_mirror() {
98 VM_ENTRY_MARK;
99 return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type()));
100 }
101
102 // ------------------------------------------------------------------
103 // ciType::make
104 //
105 // Produce the ciType for a given primitive BasicType.
106 // As a bonus, produce the right reference type for T_OBJECT.
107 // Does not work on T_ARRAY.
108 ciType* ciType::make(BasicType t) {
109 // short, etc.
110 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
111 assert((uint)t < T_CONFLICT+1, "range check");
112 if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object
113 assert(_basic_types[t] != nullptr, "domain check");
114 return _basic_types[t];
115 }
116
117 // ciReturnAddress
118 //
119 // This class represents the type of a specific return address in the
120 // bytecodes.
121
122 // ------------------------------------------------------------------
123 // ciReturnAddress::ciReturnAddress
124 //
125 ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
126 assert(0 <= bci, "bci cannot be negative");
127 _bci = bci;
128 }
129
130 // ------------------------------------------------------------------
131 // ciReturnAddress::print_impl
132 //
133 // Implementation of the print method.
134 void ciReturnAddress::print_impl(outputStream* st) {
135 st->print(" bci=%d", _bci);
136 }
137
138 // ------------------------------------------------------------------
139 // ciReturnAddress::make
140 ciReturnAddress* ciReturnAddress::make(int bci) {
141 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
142 }