|
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 }; |