Mercurial > hg > truffle
annotate src/share/vm/oops/oopsHierarchy.hpp @ 845:df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
| author | ysr |
|---|---|
| date | Tue, 14 Jul 2009 15:40:39 -0700 |
| parents | 0fbdb4381b99 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 | |
|
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29 typedef juint narrowOop; // Offset instead of address for an oop within a java object |
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30 typedef class klassOopDesc* wideKlassOop; // to keep SA happy and unhandled oop |
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31 // detector happy. |
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32 typedef void* OopOrNarrowOopStar; |
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33 |
| 0 | 34 #ifndef CHECK_UNHANDLED_OOPS |
| 35 | |
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36 typedef class oopDesc* oop; |
| 0 | 37 typedef class instanceOopDesc* instanceOop; |
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38 typedef class methodOopDesc* methodOop; |
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39 typedef class constMethodOopDesc* constMethodOop; |
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40 typedef class methodDataOopDesc* methodDataOop; |
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41 typedef class arrayOopDesc* arrayOop; |
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42 typedef class objArrayOopDesc* objArrayOop; |
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43 typedef class typeArrayOopDesc* typeArrayOop; |
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44 typedef class constantPoolOopDesc* constantPoolOop; |
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45 typedef class constantPoolCacheOopDesc* constantPoolCacheOop; |
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46 typedef class symbolOopDesc* symbolOop; |
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47 typedef class klassOopDesc* klassOop; |
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48 typedef class markOopDesc* markOop; |
| 0 | 49 typedef class compiledICHolderOopDesc* compiledICHolderOop; |
| 50 | |
| 51 #else | |
| 52 | |
| 53 | |
| 54 // When CHECK_UNHANDLED_OOPS is defined, an "oop" is a class with a | |
| 55 // carefully chosen set of constructors and conversion operators to go | |
| 56 // to and from the underlying oopDesc pointer type. | |
| 57 // | |
| 58 // Because oop and its subclasses <type>Oop are class types, arbitrary | |
| 59 // conversions are not accepted by the compiler, and you may get a message | |
| 60 // about overloading ambiguity (between long and int is common when converting | |
| 61 // from a constant in 64 bit mode), or unable to convert from type to 'oop'. | |
| 62 // Applying a cast to one of these conversion operators first will get to the | |
| 63 // underlying oopDesc* type if appropriate. | |
| 64 // Converting NULL to oop to Handle implicit is no longer accepted by the | |
| 65 // compiler because there are too many steps in the conversion. Use Handle() | |
| 66 // instead, which generates less code anyway. | |
| 67 | |
| 68 class Thread; | |
| 69 typedef class markOopDesc* markOop; | |
| 70 class PromotedObject; | |
| 71 | |
| 72 | |
| 73 class oop { | |
| 74 oopDesc* _o; | |
| 75 | |
| 76 void register_oop(); | |
| 77 void unregister_oop(); | |
| 78 | |
| 79 // friend class markOop; | |
| 80 public: | |
| 81 void set_obj(const void* p) { | |
| 82 raw_set_obj(p); | |
| 83 if (CheckUnhandledOops) register_oop(); | |
| 84 } | |
| 85 void raw_set_obj(const void* p) { _o = (oopDesc*)p; } | |
| 86 | |
| 87 oop() { set_obj(NULL); } | |
| 88 oop(const volatile oop& o) { set_obj(o.obj()); } | |
| 89 oop(const void* p) { set_obj(p); } | |
| 90 oop(intptr_t i) { set_obj((void *)i); } | |
| 91 #ifdef _LP64 | |
| 92 oop(int i) { set_obj((void *)i); } | |
| 93 #endif | |
| 94 ~oop() { | |
| 95 if (CheckUnhandledOops) unregister_oop(); | |
| 96 } | |
| 97 | |
| 98 oopDesc* obj() const volatile { return _o; } | |
| 99 | |
| 100 // General access | |
| 101 oopDesc* operator->() const { return obj(); } | |
| 102 bool operator==(const oop o) const { return obj() == o.obj(); } | |
| 103 bool operator==(void *p) const { return obj() == p; } | |
| 104 bool operator!=(const oop o) const { return obj() != o.obj(); } | |
| 105 bool operator!=(void *p) const { return obj() != p; } | |
| 106 bool operator==(intptr_t p) const { return obj() == (oopDesc*)p; } | |
| 107 bool operator!=(intptr_t p) const { return obj() != (oopDesc*)p; } | |
| 108 | |
| 109 bool operator<(oop o) const { return obj() < o.obj(); } | |
| 110 bool operator>(oop o) const { return obj() > o.obj(); } | |
| 111 bool operator<=(oop o) const { return obj() <= o.obj(); } | |
| 112 bool operator>=(oop o) const { return obj() >= o.obj(); } | |
| 113 bool operator!() const { return !obj(); } | |
| 114 | |
| 115 // Cast | |
| 116 operator void* () const { return (void *)obj(); } | |
| 117 operator HeapWord* () const { return (HeapWord*)obj(); } | |
| 118 operator oopDesc* () const { return obj(); } | |
| 119 operator intptr_t* () const { return (intptr_t*)obj(); } | |
| 120 operator PromotedObject* () const { return (PromotedObject*)obj(); } | |
| 121 operator markOop () const { return markOop(obj()); } | |
| 122 | |
| 123 operator address () const { return (address)obj(); } | |
| 124 operator intptr_t () const { return (intptr_t)obj(); } | |
| 125 | |
| 126 // from javaCalls.cpp | |
| 127 operator jobject () const { return (jobject)obj(); } | |
| 128 // from javaClasses.cpp | |
| 129 operator JavaThread* () const { return (JavaThread*)obj(); } | |
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130 |
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131 #ifndef _LP64 |
| 0 | 132 // from jvm.cpp |
| 133 operator jlong* () const { return (jlong*)obj(); } | |
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134 #endif |
| 0 | 135 |
| 136 // from parNewGeneration and other things that want to get to the end of | |
| 137 // an oop for stuff (like constMethodKlass.cpp, objArrayKlass.cpp) | |
| 138 operator oop* () const { return (oop *)obj(); } | |
| 139 }; | |
| 140 | |
| 141 #define DEF_OOP(type) \ | |
| 142 class type##OopDesc; \ | |
| 143 class type##Oop : public oop { \ | |
| 144 public: \ | |
| 145 type##Oop() : oop() {} \ | |
| 146 type##Oop(const volatile oop& o) : oop(o) {} \ | |
| 147 type##Oop(const void* p) : oop(p) {} \ | |
| 148 operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \ | |
| 149 type##OopDesc* operator->() const { \ | |
| 150 return (type##OopDesc*)obj(); \ | |
| 151 } \ | |
| 152 }; \ | |
| 153 | |
| 154 DEF_OOP(instance); | |
| 155 DEF_OOP(method); | |
| 156 DEF_OOP(methodData); | |
| 157 DEF_OOP(array); | |
| 158 DEF_OOP(constMethod); | |
| 159 DEF_OOP(constantPool); | |
| 160 DEF_OOP(constantPoolCache); | |
| 161 DEF_OOP(objArray); | |
| 162 DEF_OOP(typeArray); | |
| 163 DEF_OOP(symbol); | |
| 164 DEF_OOP(klass); | |
| 165 DEF_OOP(compiledICHolder); | |
| 166 | |
| 167 #endif // CHECK_UNHANDLED_OOPS | |
| 168 | |
| 169 // The klass hierarchy is separate from the oop hierarchy. | |
| 170 | |
| 171 class Klass; | |
| 172 class instanceKlass; | |
| 173 class instanceRefKlass; | |
| 174 class methodKlass; | |
| 175 class constMethodKlass; | |
| 176 class methodDataKlass; | |
| 177 class klassKlass; | |
| 178 class instanceKlassKlass; | |
| 179 class arrayKlassKlass; | |
| 180 class objArrayKlassKlass; | |
| 181 class typeArrayKlassKlass; | |
| 182 class arrayKlass; | |
| 183 class objArrayKlass; | |
| 184 class typeArrayKlass; | |
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185 class constantPoolKlass; |
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186 class constantPoolCacheKlass; |
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187 class symbolKlass; |
| 0 | 188 class compiledICHolderKlass; |