1
|
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 |
};
|