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src/share/vm/oops/oopsHierarchy.hpp@a61af66fc99e (annotated)

src/share/vm/oops/oopsHierarchy.hpp

Sat, 01 Dec 2007 00:00:00 +0000

author
duke
date
Sat, 01 Dec 2007 00:00:00 +0000
changeset 435
a61af66fc99e
child 548
ba764ed4b6f2
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duke@435 1 /*
duke@435 2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 *
duke@435 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435 21 * have any questions.
duke@435 22 *
duke@435 23 */
duke@435 24
duke@435 25 // OBJECT hierarchy
duke@435 26 // This hierarchy is a representation hierarchy, i.e. if A is a superclass
duke@435 27 // of B, A's representation is a prefix of B's representation.
duke@435 28
duke@435 29 #ifndef CHECK_UNHANDLED_OOPS
duke@435 30
duke@435 31 typedef class oopDesc* oop;
duke@435 32 typedef class instanceOopDesc* instanceOop;
duke@435 33 typedef class methodOopDesc* methodOop;
duke@435 34 typedef class constMethodOopDesc* constMethodOop;
duke@435 35 typedef class methodDataOopDesc* methodDataOop;
duke@435 36 typedef class arrayOopDesc* arrayOop;
duke@435 37 typedef class constantPoolOopDesc* constantPoolOop;
duke@435 38 typedef class constantPoolCacheOopDesc* constantPoolCacheOop;
duke@435 39 typedef class objArrayOopDesc* objArrayOop;
duke@435 40 typedef class typeArrayOopDesc* typeArrayOop;
duke@435 41 typedef class symbolOopDesc* symbolOop;
duke@435 42 typedef class klassOopDesc* klassOop;
duke@435 43 typedef class markOopDesc* markOop;
duke@435 44 typedef class compiledICHolderOopDesc* compiledICHolderOop;
duke@435 45
duke@435 46 #else
duke@435 47
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 typedef class markOopDesc* markOop;
duke@435 65 class PromotedObject;
duke@435 66
duke@435 67
duke@435 68 class oop {
duke@435 69 oopDesc* _o;
duke@435 70
duke@435 71 void register_oop();
duke@435 72 void unregister_oop();
duke@435 73
duke@435 74 // friend class markOop;
duke@435 75 public:
duke@435 76 void set_obj(const void* p) {
duke@435 77 raw_set_obj(p);
duke@435 78 if (CheckUnhandledOops) register_oop();
duke@435 79 }
duke@435 80 void raw_set_obj(const void* p) { _o = (oopDesc*)p; }
duke@435 81
duke@435 82 oop() { set_obj(NULL); }
duke@435 83 oop(const volatile oop& o) { set_obj(o.obj()); }
duke@435 84 oop(const void* p) { set_obj(p); }
duke@435 85 oop(intptr_t i) { set_obj((void *)i); }
duke@435 86 #ifdef _LP64
duke@435 87 oop(int i) { set_obj((void *)i); }
duke@435 88 #endif
duke@435 89 ~oop() {
duke@435 90 if (CheckUnhandledOops) unregister_oop();
duke@435 91 }
duke@435 92
duke@435 93 oopDesc* obj() const volatile { return _o; }
duke@435 94
duke@435 95 // General access
duke@435 96 oopDesc* operator->() const { return obj(); }
duke@435 97 bool operator==(const oop o) const { return obj() == o.obj(); }
duke@435 98 bool operator==(void *p) const { return obj() == p; }
duke@435 99 bool operator!=(const oop o) const { return obj() != o.obj(); }
duke@435 100 bool operator!=(void *p) const { return obj() != p; }
duke@435 101 bool operator==(intptr_t p) const { return obj() == (oopDesc*)p; }
duke@435 102 bool operator!=(intptr_t p) const { return obj() != (oopDesc*)p; }
duke@435 103
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>=(oop o) const { return obj() >= o.obj(); }
duke@435 108 bool operator!() const { return !obj(); }
duke@435 109
duke@435 110 // Cast
duke@435 111 operator void* () const { return (void *)obj(); }
duke@435 112 operator HeapWord* () const { return (HeapWord*)obj(); }
duke@435 113 operator oopDesc* () const { return obj(); }
duke@435 114 operator intptr_t* () const { return (intptr_t*)obj(); }
duke@435 115 operator PromotedObject* () const { return (PromotedObject*)obj(); }
duke@435 116 operator markOop () const { return markOop(obj()); }
duke@435 117
duke@435 118 operator address () const { return (address)obj(); }
duke@435 119 operator intptr_t () const { return (intptr_t)obj(); }
duke@435 120
duke@435 121 // from javaCalls.cpp
duke@435 122 operator jobject () const { return (jobject)obj(); }
duke@435 123 // from javaClasses.cpp
duke@435 124 operator JavaThread* () const { return (JavaThread*)obj(); }
duke@435 125 // from jvm.cpp
duke@435 126 operator jlong* () const { return (jlong*)obj(); }
duke@435 127
duke@435 128 // from parNewGeneration and other things that want to get to the end of
duke@435 129 // an oop for stuff (like constMethodKlass.cpp, objArrayKlass.cpp)
duke@435 130 operator oop* () const { return (oop *)obj(); }
duke@435 131 };
duke@435 132
duke@435 133 #define DEF_OOP(type) \
duke@435 134 class type##OopDesc; \
duke@435 135 class type##Oop : public oop { \
duke@435 136 public: \
duke@435 137 type##Oop() : oop() {} \
duke@435 138 type##Oop(const volatile oop& o) : oop(o) {} \
duke@435 139 type##Oop(const void* p) : oop(p) {} \
duke@435 140 operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \
duke@435 141 type##OopDesc* operator->() const { \
duke@435 142 return (type##OopDesc*)obj(); \
duke@435 143 } \
duke@435 144 }; \
duke@435 145
duke@435 146 DEF_OOP(instance);
duke@435 147 DEF_OOP(method);
duke@435 148 DEF_OOP(methodData);
duke@435 149 DEF_OOP(array);
duke@435 150 DEF_OOP(constMethod);
duke@435 151 DEF_OOP(constantPool);
duke@435 152 DEF_OOP(constantPoolCache);
duke@435 153 DEF_OOP(objArray);
duke@435 154 DEF_OOP(typeArray);
duke@435 155 DEF_OOP(symbol);
duke@435 156 DEF_OOP(klass);
duke@435 157 DEF_OOP(compiledICHolder);
duke@435 158
duke@435 159 #endif // CHECK_UNHANDLED_OOPS
duke@435 160
duke@435 161 // The klass hierarchy is separate from the oop hierarchy.
duke@435 162
duke@435 163 class Klass;
duke@435 164 class instanceKlass;
duke@435 165 class instanceRefKlass;
duke@435 166 class methodKlass;
duke@435 167 class constMethodKlass;
duke@435 168 class methodDataKlass;
duke@435 169 class klassKlass;
duke@435 170 class instanceKlassKlass;
duke@435 171 class arrayKlassKlass;
duke@435 172 class objArrayKlassKlass;
duke@435 173 class typeArrayKlassKlass;
duke@435 174 class arrayKlass;
duke@435 175 class constantPoolKlass;
duke@435 176 class constantPoolCacheKlass;
duke@435 177 class objArrayKlass;
duke@435 178 class typeArrayKlass;
duke@435 179 class symbolKlass;
duke@435 180 class compiledICHolderKlass;

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