src/share/vm/oops/oopsHierarchy.hpp

Fri, 07 Sep 2012 12:04:16 -0400

author
coleenp
date
Fri, 07 Sep 2012 12:04:16 -0400
changeset 4047
aed758eda82a
parent 4037
da91efe96a93
child 4142
d8ce2825b193
permissions
-rw-r--r--

7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
Summary: Simple renaming to be consistent with instanceKlass->InstanceKlass renaming
Reviewed-by: stefank, jmasa

duke@435 1 /*
coleenp@4037 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
trims@1907 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907 20 * or visit www.oracle.com if you need additional information or have any
trims@1907 21 * questions.
duke@435 22 *
duke@435 23 */
duke@435 24
stefank@2314 25 #ifndef SHARE_VM_OOPS_OOPSHIERARCHY_HPP
stefank@2314 26 #define SHARE_VM_OOPS_OOPSHIERARCHY_HPP
stefank@2314 27
stefank@2314 28 #include "runtime/globals.hpp"
stefank@2314 29 #include "utilities/globalDefinitions.hpp"
stefank@2314 30
duke@435 31 // OBJECT hierarchy
duke@435 32 // This hierarchy is a representation hierarchy, i.e. if A is a superclass
duke@435 33 // of B, A's representation is a prefix of B's representation.
duke@435 34
coleenp@548 35 typedef juint narrowOop; // Offset instead of address for an oop within a java object
ysr@1280 36 typedef void* OopOrNarrowOopStar;
coleenp@4037 37 typedef class markOopDesc* markOop;
coleenp@548 38
duke@435 39 #ifndef CHECK_UNHANDLED_OOPS
duke@435 40
coleenp@548 41 typedef class oopDesc* oop;
duke@435 42 typedef class instanceOopDesc* instanceOop;
coleenp@548 43 typedef class arrayOopDesc* arrayOop;
coleenp@548 44 typedef class objArrayOopDesc* objArrayOop;
coleenp@548 45 typedef class typeArrayOopDesc* typeArrayOop;
duke@435 46
duke@435 47 #else
duke@435 48
duke@435 49 // When CHECK_UNHANDLED_OOPS is defined, an "oop" is a class with a
duke@435 50 // carefully chosen set of constructors and conversion operators to go
duke@435 51 // to and from the underlying oopDesc pointer type.
duke@435 52 //
duke@435 53 // Because oop and its subclasses <type>Oop are class types, arbitrary
duke@435 54 // conversions are not accepted by the compiler, and you may get a message
duke@435 55 // about overloading ambiguity (between long and int is common when converting
duke@435 56 // from a constant in 64 bit mode), or unable to convert from type to 'oop'.
duke@435 57 // Applying a cast to one of these conversion operators first will get to the
duke@435 58 // underlying oopDesc* type if appropriate.
duke@435 59 // Converting NULL to oop to Handle implicit is no longer accepted by the
duke@435 60 // compiler because there are too many steps in the conversion. Use Handle()
duke@435 61 // instead, which generates less code anyway.
duke@435 62
duke@435 63 class Thread;
duke@435 64 class PromotedObject;
duke@435 65
duke@435 66
duke@435 67 class oop {
duke@435 68 oopDesc* _o;
duke@435 69
duke@435 70 void register_oop();
duke@435 71 void unregister_oop();
duke@435 72
duke@435 73 // friend class markOop;
duke@435 74 public:
duke@435 75 void set_obj(const void* p) {
duke@435 76 raw_set_obj(p);
duke@435 77 if (CheckUnhandledOops) register_oop();
duke@435 78 }
duke@435 79 void raw_set_obj(const void* p) { _o = (oopDesc*)p; }
duke@435 80
duke@435 81 oop() { set_obj(NULL); }
duke@435 82 oop(const volatile oop& o) { set_obj(o.obj()); }
duke@435 83 oop(const void* p) { set_obj(p); }
duke@435 84 oop(intptr_t i) { set_obj((void *)i); }
duke@435 85 #ifdef _LP64
duke@435 86 oop(int i) { set_obj((void *)i); }
duke@435 87 #endif
duke@435 88 ~oop() {
duke@435 89 if (CheckUnhandledOops) unregister_oop();
duke@435 90 }
duke@435 91
duke@435 92 oopDesc* obj() const volatile { return _o; }
duke@435 93
duke@435 94 // General access
duke@435 95 oopDesc* operator->() const { return obj(); }
duke@435 96 bool operator==(const oop o) const { return obj() == o.obj(); }
duke@435 97 bool operator==(void *p) const { return obj() == p; }
coleenp@4037 98 bool operator!=(const volatile oop o) const { return obj() != o.obj(); }
duke@435 99 bool operator!=(void *p) const { return obj() != p; }
duke@435 100 bool operator==(intptr_t p) const { return obj() == (oopDesc*)p; }
duke@435 101 bool operator!=(intptr_t p) const { return obj() != (oopDesc*)p; }
duke@435 102
duke@435 103 bool operator<(oop o) const { return obj() < o.obj(); }
duke@435 104 bool operator>(oop o) const { return obj() > o.obj(); }
duke@435 105 bool operator<=(oop o) const { return obj() <= o.obj(); }
duke@435 106 bool operator>=(oop o) const { return obj() >= o.obj(); }
duke@435 107 bool operator!() const { return !obj(); }
duke@435 108
duke@435 109 // Cast
duke@435 110 operator void* () const { return (void *)obj(); }
duke@435 111 operator HeapWord* () const { return (HeapWord*)obj(); }
duke@435 112 operator oopDesc* () const { return obj(); }
duke@435 113 operator intptr_t* () const { return (intptr_t*)obj(); }
duke@435 114 operator PromotedObject* () const { return (PromotedObject*)obj(); }
duke@435 115 operator markOop () const { return markOop(obj()); }
duke@435 116
duke@435 117 operator address () const { return (address)obj(); }
coleenp@4037 118 operator intptr_t () const volatile { return (intptr_t)obj(); }
duke@435 119
duke@435 120 // from javaCalls.cpp
duke@435 121 operator jobject () const { return (jobject)obj(); }
duke@435 122 // from javaClasses.cpp
duke@435 123 operator JavaThread* () const { return (JavaThread*)obj(); }
xlu@948 124
xlu@948 125 #ifndef _LP64
duke@435 126 // from jvm.cpp
duke@435 127 operator jlong* () const { return (jlong*)obj(); }
xlu@948 128 #endif
duke@435 129
duke@435 130 // from parNewGeneration and other things that want to get to the end of
coleenp@4037 131 // an oop for stuff (like objArrayKlass.cpp)
duke@435 132 operator oop* () const { return (oop *)obj(); }
duke@435 133 };
duke@435 134
duke@435 135 #define DEF_OOP(type) \
duke@435 136 class type##OopDesc; \
duke@435 137 class type##Oop : public oop { \
duke@435 138 public: \
duke@435 139 type##Oop() : oop() {} \
duke@435 140 type##Oop(const volatile oop& o) : oop(o) {} \
duke@435 141 type##Oop(const void* p) : oop(p) {} \
duke@435 142 operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \
duke@435 143 type##OopDesc* operator->() const { \
duke@435 144 return (type##OopDesc*)obj(); \
duke@435 145 } \
coleenp@4037 146 };
duke@435 147
duke@435 148 DEF_OOP(instance);
duke@435 149 DEF_OOP(array);
duke@435 150 DEF_OOP(objArray);
duke@435 151 DEF_OOP(typeArray);
duke@435 152
duke@435 153 #endif // CHECK_UNHANDLED_OOPS
duke@435 154
coleenp@4037 155 // The metadata hierarchy is separate from the oop hierarchy
coleenp@4037 156
coleenp@4037 157 // class MetaspaceObj
coleenp@4037 158 class ConstMethod;
coleenp@4037 159 class ConstantPoolCache;
coleenp@4037 160 class MethodData;
coleenp@4037 161 // class Metadata
coleenp@4037 162 class Method;
coleenp@4037 163 class ConstantPool;
coleenp@4037 164 // class CHeapObj
coleenp@4037 165 class CompiledICHolder;
coleenp@4037 166
coleenp@4037 167
duke@435 168 // The klass hierarchy is separate from the oop hierarchy.
duke@435 169
duke@435 170 class Klass;
coleenp@4037 171 class InstanceKlass;
coleenp@4047 172 class InstanceMirrorKlass;
coleenp@4047 173 class InstanceClassLoaderKlass;
coleenp@4047 174 class InstanceRefKlass;
duke@435 175 class arrayKlass;
duke@435 176 class objArrayKlass;
duke@435 177 class typeArrayKlass;
stefank@2314 178
stefank@2314 179 #endif // SHARE_VM_OOPS_OOPSHIERARCHY_HPP

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