|
0
|
1 /*
|
|
|
2 * Copyright 2000-2001 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 // ciType
|
|
|
26 //
|
|
|
27 // This class represents either a class (T_OBJECT), array (T_ARRAY),
|
|
|
28 // or one of the primitive types such as T_INT.
|
|
|
29 class ciType : public ciObject {
|
|
|
30 CI_PACKAGE_ACCESS
|
|
|
31 friend class ciKlass;
|
|
|
32 friend class ciReturnAddress;
|
|
|
33
|
|
|
34 private:
|
|
|
35 BasicType _basic_type;
|
|
|
36
|
|
|
37 ciType(BasicType t); // for the primitive types only
|
|
|
38 ciType(KlassHandle k); // for subclasses (reference types)
|
|
|
39 ciType(ciKlass* klass); // for unloaded types
|
|
|
40
|
|
|
41 const char* type_string() { return "ciType"; }
|
|
|
42
|
|
|
43 void print_impl(outputStream* st);
|
|
|
44
|
|
|
45 // Distinguished instances of primitive ciTypes..
|
|
|
46 static ciType* _basic_types[T_CONFLICT+1];
|
|
|
47
|
|
|
48 public:
|
|
|
49 BasicType basic_type() const { return _basic_type; }
|
|
|
50
|
|
|
51 // Returns true iff the types are identical, or if both are klasses
|
|
|
52 // and the is_subtype_of relation holds between the klasses.
|
|
|
53 bool is_subtype_of(ciType* type);
|
|
|
54
|
|
|
55 // Get the instance of java.lang.Class corresponding to this type.
|
|
|
56 // There are mirrors for instance, array, and primitive types (incl. void).
|
|
|
57 virtual ciInstance* java_mirror();
|
|
|
58
|
|
|
59 // Get the class which "boxes" (or "wraps") values of this type.
|
|
|
60 // Example: short is boxed by java.lang.Short, etc.
|
|
|
61 // Returns self if it is a reference type.
|
|
|
62 // Returns NULL for void, since null is used in such cases.
|
|
|
63 ciKlass* box_klass();
|
|
|
64
|
|
|
65 // Returns true if this is not a klass or array (i.e., not a reference type).
|
|
|
66 bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; }
|
|
|
67 int size() const { return type2size[basic_type()]; }
|
|
|
68 bool is_void() const { return basic_type() == T_VOID; }
|
|
|
69 bool is_one_word() const { return size() == 1; }
|
|
|
70 bool is_two_word() const { return size() == 2; }
|
|
|
71
|
|
|
72 // What kind of ciObject is this?
|
|
|
73 bool is_type() { return true; }
|
|
|
74 bool is_classless() const { return is_primitive_type(); }
|
|
|
75
|
|
|
76 virtual void print_name_on(outputStream* st);
|
|
|
77 void print_name() {
|
|
|
78 print_name_on(tty);
|
|
|
79 }
|
|
|
80
|
|
|
81 static ciType* make(BasicType t);
|
|
|
82 };
|
|
|
83
|
|
|
84
|
|
|
85 // ciReturnAddress
|
|
|
86 //
|
|
|
87 // This class represents the type of a specific return address in the
|
|
|
88 // bytecodes.
|
|
|
89 class ciReturnAddress : public ciType {
|
|
|
90 CI_PACKAGE_ACCESS
|
|
|
91
|
|
|
92 private:
|
|
|
93 // The bci of this return address.
|
|
|
94 int _bci;
|
|
|
95
|
|
|
96 ciReturnAddress(int bci);
|
|
|
97
|
|
|
98 const char* type_string() { return "ciReturnAddress"; }
|
|
|
99
|
|
|
100 void print_impl(outputStream* st);
|
|
|
101
|
|
|
102 public:
|
|
|
103 bool is_return_address() { return true; }
|
|
|
104
|
|
|
105 int bci() { return _bci; }
|
|
|
106
|
|
|
107 static ciReturnAddress* make(int bci);
|
|
|
108 };
|
