1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_OOPS_OOPSHIERARCHY_HPP
26 #define SHARE_VM_OOPS_OOPSHIERARCHY_HPP
27
28 #include "runtime/globals.hpp"
29 #include "utilities/globalDefinitions.hpp"
30
31 // OBJECT hierarchy
32 // This hierarchy is a representation hierarchy, i.e. if A is a superclass
33 // of B, A's representation is a prefix of B's representation.
34
35 typedef juint narrowOop; // Offset instead of address for an oop within a java object
36
37 // If compressed klass pointers then use narrowKlass.
38 typedef juint narrowKlass;
39
40 typedef void* OopOrNarrowOopStar;
41 typedef class markOopDesc* markOop;
42
43 #ifndef CHECK_UNHANDLED_OOPS
44
45 typedef class oopDesc* oop;
46 typedef class instanceOopDesc* instanceOop;
47 typedef class arrayOopDesc* arrayOop;
123 operator HeapWord* () const { return (HeapWord*)obj(); }
124 operator oopDesc* () const volatile { return obj(); }
125 operator intptr_t* () const { return (intptr_t*)obj(); }
126 operator PromotedObject* () const { return (PromotedObject*)obj(); }
127 operator markOop () const volatile { return markOop(obj()); }
128 operator address () const { return (address)obj(); }
129
130 // from javaCalls.cpp
131 operator jobject () const { return (jobject)obj(); }
132 // from javaClasses.cpp
133 operator JavaThread* () const { return (JavaThread*)obj(); }
134
135 #ifndef _LP64
136 // from jvm.cpp
137 operator jlong* () const { return (jlong*)obj(); }
138 #endif
139
140 // from parNewGeneration and other things that want to get to the end of
141 // an oop for stuff (like ObjArrayKlass.cpp)
142 operator oop* () const { return (oop *)obj(); }
143 };
144
145 #define DEF_OOP(type) \
146 class type##OopDesc; \
147 class type##Oop : public oop { \
148 public: \
149 type##Oop() : oop() {} \
150 type##Oop(const oop& o) : oop(o) {} \
151 type##Oop(const volatile oop& o) : oop(o) {} \
152 type##Oop(const void* p) : oop(p) {} \
153 operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \
154 type##OopDesc* operator->() const { \
155 return (type##OopDesc*)obj(); \
156 } \
157 type##Oop& operator=(const type##Oop& o) { \
158 oop::operator=(o); \
159 return *this; \
160 } \
161 volatile type##Oop& operator=(const type##Oop& o) volatile { \
162 (void)const_cast<oop&>(oop::operator=(o)); \
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1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_OOPS_OOPSHIERARCHY_HPP
26 #define SHARE_VM_OOPS_OOPSHIERARCHY_HPP
27
28 #include "metaprogramming/integerTypes.hpp"
29 #include "metaprogramming/integralConstant.hpp"
30 #include "runtime/globals.hpp"
31 #include "utilities/globalDefinitions.hpp"
32
33 // OBJECT hierarchy
34 // This hierarchy is a representation hierarchy, i.e. if A is a superclass
35 // of B, A's representation is a prefix of B's representation.
36
37 typedef juint narrowOop; // Offset instead of address for an oop within a java object
38
39 // If compressed klass pointers then use narrowKlass.
40 typedef juint narrowKlass;
41
42 typedef void* OopOrNarrowOopStar;
43 typedef class markOopDesc* markOop;
44
45 #ifndef CHECK_UNHANDLED_OOPS
46
47 typedef class oopDesc* oop;
48 typedef class instanceOopDesc* instanceOop;
49 typedef class arrayOopDesc* arrayOop;
125 operator HeapWord* () const { return (HeapWord*)obj(); }
126 operator oopDesc* () const volatile { return obj(); }
127 operator intptr_t* () const { return (intptr_t*)obj(); }
128 operator PromotedObject* () const { return (PromotedObject*)obj(); }
129 operator markOop () const volatile { return markOop(obj()); }
130 operator address () const { return (address)obj(); }
131
132 // from javaCalls.cpp
133 operator jobject () const { return (jobject)obj(); }
134 // from javaClasses.cpp
135 operator JavaThread* () const { return (JavaThread*)obj(); }
136
137 #ifndef _LP64
138 // from jvm.cpp
139 operator jlong* () const { return (jlong*)obj(); }
140 #endif
141
142 // from parNewGeneration and other things that want to get to the end of
143 // an oop for stuff (like ObjArrayKlass.cpp)
144 operator oop* () const { return (oop *)obj(); }
145 };
146
147 template<>
148 struct IntegerTypes::Translate<oop> : public TrueType {
149 typedef oop Value;
150 typedef oopDesc* Decayed;
151
152 static Decayed decay(Value x) { return x.obj(); }
153 static Value recover(Decayed x) { return oop(x); }
154 };
155
156 #define DEF_OOP(type) \
157 class type##OopDesc; \
158 class type##Oop : public oop { \
159 public: \
160 type##Oop() : oop() {} \
161 type##Oop(const oop& o) : oop(o) {} \
162 type##Oop(const volatile oop& o) : oop(o) {} \
163 type##Oop(const void* p) : oop(p) {} \
164 operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \
165 type##OopDesc* operator->() const { \
166 return (type##OopDesc*)obj(); \
167 } \
168 type##Oop& operator=(const type##Oop& o) { \
169 oop::operator=(o); \
170 return *this; \
171 } \
172 volatile type##Oop& operator=(const type##Oop& o) volatile { \
173 (void)const_cast<oop&>(oop::operator=(o)); \
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