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comparison src/share/vm/oops/oopsHierarchy.hpp @ 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 1997-2007 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 // OBJECT hierarchy
26 // This hierarchy is a representation hierarchy, i.e. if A is a superclass
27 // of B, A's representation is a prefix of B's representation.
28
29 #ifndef CHECK_UNHANDLED_OOPS
30
31 typedef class oopDesc* oop;
32 typedef class instanceOopDesc* instanceOop;
33 typedef class methodOopDesc* methodOop;
34 typedef class constMethodOopDesc* constMethodOop;
35 typedef class methodDataOopDesc* methodDataOop;
36 typedef class arrayOopDesc* arrayOop;
37 typedef class constantPoolOopDesc* constantPoolOop;
38 typedef class constantPoolCacheOopDesc* constantPoolCacheOop;
39 typedef class objArrayOopDesc* objArrayOop;
40 typedef class typeArrayOopDesc* typeArrayOop;
41 typedef class symbolOopDesc* symbolOop;
42 typedef class klassOopDesc* klassOop;
43 typedef class markOopDesc* markOop;
44 typedef class compiledICHolderOopDesc* compiledICHolderOop;
45
46 #else
47
48
49 // When CHECK_UNHANDLED_OOPS is defined, an "oop" is a class with a
50 // carefully chosen set of constructors and conversion operators to go
51 // to and from the underlying oopDesc pointer type.
52 //
53 // Because oop and its subclasses <type>Oop are class types, arbitrary
54 // conversions are not accepted by the compiler, and you may get a message
55 // about overloading ambiguity (between long and int is common when converting
56 // from a constant in 64 bit mode), or unable to convert from type to 'oop'.
57 // Applying a cast to one of these conversion operators first will get to the
58 // underlying oopDesc* type if appropriate.
59 // Converting NULL to oop to Handle implicit is no longer accepted by the
60 // compiler because there are too many steps in the conversion. Use Handle()
61 // instead, which generates less code anyway.
62
63 class Thread;
64 typedef class markOopDesc* markOop;
65 class PromotedObject;
66
67
68 class oop {
69 oopDesc* _o;
70
71 void register_oop();
72 void unregister_oop();
73
74 // friend class markOop;
75 public:
76 void set_obj(const void* p) {
77 raw_set_obj(p);
78 if (CheckUnhandledOops) register_oop();
79 }
80 void raw_set_obj(const void* p) { _o = (oopDesc*)p; }
81
82 oop() { set_obj(NULL); }
83 oop(const volatile oop& o) { set_obj(o.obj()); }
84 oop(const void* p) { set_obj(p); }
85 oop(intptr_t i) { set_obj((void *)i); }
86 #ifdef _LP64
87 oop(int i) { set_obj((void *)i); }
88 #endif
89 ~oop() {
90 if (CheckUnhandledOops) unregister_oop();
91 }
92
93 oopDesc* obj() const volatile { return _o; }
94
95 // General access
96 oopDesc* operator->() const { return obj(); }
97 bool operator==(const oop o) const { return obj() == o.obj(); }
98 bool operator==(void *p) const { return obj() == p; }
99 bool operator!=(const oop o) const { return obj() != o.obj(); }
100 bool operator!=(void *p) const { return obj() != p; }
101 bool operator==(intptr_t p) const { return obj() == (oopDesc*)p; }
102 bool operator!=(intptr_t p) const { return obj() != (oopDesc*)p; }
103
104 bool operator<(oop o) const { return obj() < o.obj(); }
105 bool operator>(oop o) const { return obj() > o.obj(); }
106 bool operator<=(oop o) const { return obj() <= o.obj(); }
107 bool operator>=(oop o) const { return obj() >= o.obj(); }
108 bool operator!() const { return !obj(); }
109
110 // Cast
111 operator void* () const { return (void *)obj(); }
112 operator HeapWord* () const { return (HeapWord*)obj(); }
113 operator oopDesc* () const { return obj(); }
114 operator intptr_t* () const { return (intptr_t*)obj(); }
115 operator PromotedObject* () const { return (PromotedObject*)obj(); }
116 operator markOop () const { return markOop(obj()); }
117
118 operator address () const { return (address)obj(); }
119 operator intptr_t () const { return (intptr_t)obj(); }
120
121 // from javaCalls.cpp
122 operator jobject () const { return (jobject)obj(); }
123 // from javaClasses.cpp
124 operator JavaThread* () const { return (JavaThread*)obj(); }
125 // from jvm.cpp
126 operator jlong* () const { return (jlong*)obj(); }
127
128 // from parNewGeneration and other things that want to get to the end of
129 // an oop for stuff (like constMethodKlass.cpp, objArrayKlass.cpp)
130 operator oop* () const { return (oop *)obj(); }
131 };
132
133 #define DEF_OOP(type) \
134 class type##OopDesc; \
135 class type##Oop : public oop { \
136 public: \
137 type##Oop() : oop() {} \
138 type##Oop(const volatile oop& o) : oop(o) {} \
139 type##Oop(const void* p) : oop(p) {} \
140 operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \
141 type##OopDesc* operator->() const { \
142 return (type##OopDesc*)obj(); \
143 } \
144 }; \
145
146 DEF_OOP(instance);
147 DEF_OOP(method);
148 DEF_OOP(methodData);
149 DEF_OOP(array);
150 DEF_OOP(constMethod);
151 DEF_OOP(constantPool);
152 DEF_OOP(constantPoolCache);
153 DEF_OOP(objArray);
154 DEF_OOP(typeArray);
155 DEF_OOP(symbol);
156 DEF_OOP(klass);
157 DEF_OOP(compiledICHolder);
158
159 #endif // CHECK_UNHANDLED_OOPS
160
161 // The klass hierarchy is separate from the oop hierarchy.
162
163 class Klass;
164 class instanceKlass;
165 class instanceRefKlass;
166 class methodKlass;
167 class constMethodKlass;
168 class methodDataKlass;
169 class klassKlass;
170 class instanceKlassKlass;
171 class arrayKlassKlass;
172 class objArrayKlassKlass;
173 class typeArrayKlassKlass;
174 class arrayKlass;
175 class constantPoolKlass;
176 class constantPoolCacheKlass;
177 class objArrayKlass;
178 class typeArrayKlass;
179 class symbolKlass;
180 class compiledICHolderKlass;