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comparison src/share/vm/ci/ciType.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_ciType.cpp.incl"
27
28 ciType* ciType::_basic_types[T_CONFLICT+1];
29
30 // ciType
31 //
32 // This class represents either a class (T_OBJECT), array (T_ARRAY),
33 // or one of the primitive types such as T_INT.
34
35 // ------------------------------------------------------------------
36 // ciType::ciType
37 //
38 ciType::ciType(BasicType basic_type) : ciObject() {
39 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
40 assert(basic_type != T_OBJECT && basic_type != T_ARRAY, "not a reference type");
41 _basic_type = basic_type;
42 }
43
44 ciType::ciType(KlassHandle k) : ciObject(k) {
45 _basic_type = Klass::cast(k())->oop_is_array() ? T_ARRAY : T_OBJECT;
46 }
47
48 ciType::ciType(ciKlass* klass) : ciObject(klass) {
49 _basic_type = klass->is_array_klass_klass() ? T_ARRAY : T_OBJECT;
50 }
51
52
53 // ------------------------------------------------------------------
54 // ciType::is_subtype_of
55 //
56 bool ciType::is_subtype_of(ciType* type) {
57 if (this == type) return true;
58 if (is_klass() && type->is_klass())
59 return this->as_klass()->is_subtype_of(type->as_klass());
60 return false;
61 }
62
63 // ------------------------------------------------------------------
64 // ciType::print_impl
65 //
66 // Implementation of the print method.
67 void ciType::print_impl(outputStream* st) {
68 st->print(" type=");
69 print_name_on(st);
70 }
71
72 // ------------------------------------------------------------------
73 // ciType::print_name
74 //
75 // Print the name of this type
76 void ciType::print_name_on(outputStream* st) {
77 st->print(type2name(basic_type()));
78 }
79
80
81
82 // ------------------------------------------------------------------
83 // ciType::java_mirror
84 //
85 ciInstance* ciType::java_mirror() {
86 VM_ENTRY_MARK;
87 return CURRENT_THREAD_ENV->get_object(Universe::java_mirror(basic_type()))->as_instance();
88 }
89
90 // ------------------------------------------------------------------
91 // ciType::box_klass
92 //
93 ciKlass* ciType::box_klass() {
94 if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing"
95
96 // Void is "boxed" with a null.
97 if (basic_type() == T_VOID) return NULL;
98
99 VM_ENTRY_MARK;
100 return CURRENT_THREAD_ENV->get_object(SystemDictionary::box_klass(basic_type()))->as_instance_klass();
101 }
102
103
104 // ------------------------------------------------------------------
105 // ciType::make
106 //
107 // Produce the ciType for a given primitive BasicType.
108 // As a bonus, produce the right reference type for T_OBJECT.
109 // Does not work on T_ARRAY.
110 ciType* ciType::make(BasicType t) {
111 // short, etc.
112 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
113 assert((uint)t < T_CONFLICT+1, "range check");
114 if (t == T_OBJECT) return ciEnv::_Object; // java/lang/Object
115 assert(_basic_types[t] != NULL, "domain check");
116 return _basic_types[t];
117 }
118
119 // ciReturnAddress
120 //
121 // This class represents the type of a specific return address in the
122 // bytecodes.
123
124 // ------------------------------------------------------------------
125 // ciReturnAddress::ciReturnAddress
126 //
127 ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
128 assert(0 <= bci, "bci cannot be negative");
129 _bci = bci;
130 }
131
132 // ------------------------------------------------------------------
133 // ciReturnAddress::print_impl
134 //
135 // Implementation of the print method.
136 void ciReturnAddress::print_impl(outputStream* st) {
137 st->print(" bci=%d", _bci);
138 }
139
140 // ------------------------------------------------------------------
141 // ciReturnAddress::make
142 ciReturnAddress* ciReturnAddress::make(int bci) {
143 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
144 }