Mercurial > hg > graal-compiler
annotate src/share/vm/oops/oopsHierarchy.hpp @ 12056:740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops
8005933: The -Xshare:auto option is ignored for -server
Summary: Move klass metaspace above the heap and support CDS with compressed klass ptrs.
Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank
| author | hseigel |
|---|---|
| date | Thu, 15 Aug 2013 20:04:10 -0400 |
| parents | d8ce2825b193 |
| children | 190899198332 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 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 | |
| 0 | 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 | |
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35 typedef juint narrowOop; // Offset instead of address for an oop within a java object |
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36 |
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37 // If compressed klass pointers then use narrowKlass. |
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38 typedef juint narrowKlass; |
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39 |
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40 typedef void* OopOrNarrowOopStar; |
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41 typedef class markOopDesc* markOop; |
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42 |
| 0 | 43 #ifndef CHECK_UNHANDLED_OOPS |
| 44 | |
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45 typedef class oopDesc* oop; |
| 0 | 46 typedef class instanceOopDesc* instanceOop; |
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47 typedef class arrayOopDesc* arrayOop; |
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48 typedef class objArrayOopDesc* objArrayOop; |
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49 typedef class typeArrayOopDesc* typeArrayOop; |
| 0 | 50 |
| 51 #else | |
| 52 | |
| 53 // When CHECK_UNHANDLED_OOPS is defined, an "oop" is a class with a | |
| 54 // carefully chosen set of constructors and conversion operators to go | |
| 55 // to and from the underlying oopDesc pointer type. | |
| 56 // | |
| 57 // Because oop and its subclasses <type>Oop are class types, arbitrary | |
| 58 // conversions are not accepted by the compiler, and you may get a message | |
| 59 // about overloading ambiguity (between long and int is common when converting | |
| 60 // from a constant in 64 bit mode), or unable to convert from type to 'oop'. | |
| 61 // Applying a cast to one of these conversion operators first will get to the | |
| 62 // underlying oopDesc* type if appropriate. | |
| 63 // Converting NULL to oop to Handle implicit is no longer accepted by the | |
| 64 // compiler because there are too many steps in the conversion. Use Handle() | |
| 65 // instead, which generates less code anyway. | |
| 66 | |
| 67 class Thread; | |
| 68 class PromotedObject; | |
| 69 | |
| 70 | |
| 71 class oop { | |
| 72 oopDesc* _o; | |
| 73 | |
| 74 void register_oop(); | |
| 75 void unregister_oop(); | |
| 76 | |
| 77 // friend class markOop; | |
| 78 public: | |
| 79 void set_obj(const void* p) { | |
| 80 raw_set_obj(p); | |
| 81 if (CheckUnhandledOops) register_oop(); | |
| 82 } | |
| 83 void raw_set_obj(const void* p) { _o = (oopDesc*)p; } | |
| 84 | |
| 85 oop() { set_obj(NULL); } | |
| 86 oop(const volatile oop& o) { set_obj(o.obj()); } | |
| 87 oop(const void* p) { set_obj(p); } | |
| 88 oop(intptr_t i) { set_obj((void *)i); } | |
| 89 #ifdef _LP64 | |
| 90 oop(int i) { set_obj((void *)i); } | |
| 91 #endif | |
| 92 ~oop() { | |
| 93 if (CheckUnhandledOops) unregister_oop(); | |
| 94 } | |
| 95 | |
| 96 oopDesc* obj() const volatile { return _o; } | |
| 97 | |
| 98 // General access | |
| 99 oopDesc* operator->() const { return obj(); } | |
| 100 bool operator==(const oop o) const { return obj() == o.obj(); } | |
| 101 bool operator==(void *p) const { return obj() == p; } | |
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102 bool operator!=(const volatile oop o) const { return obj() != o.obj(); } |
| 0 | 103 bool operator!=(void *p) const { return obj() != p; } |
| 104 bool operator==(intptr_t p) const { return obj() == (oopDesc*)p; } | |
| 105 bool operator!=(intptr_t p) const { return obj() != (oopDesc*)p; } | |
| 106 | |
| 107 bool operator<(oop o) const { return obj() < o.obj(); } | |
| 108 bool operator>(oop o) const { return obj() > o.obj(); } | |
| 109 bool operator<=(oop o) const { return obj() <= o.obj(); } | |
| 110 bool operator>=(oop o) const { return obj() >= o.obj(); } | |
| 111 bool operator!() const { return !obj(); } | |
| 112 | |
| 113 // Cast | |
| 114 operator void* () const { return (void *)obj(); } | |
| 115 operator HeapWord* () const { return (HeapWord*)obj(); } | |
| 116 operator oopDesc* () const { return obj(); } | |
| 117 operator intptr_t* () const { return (intptr_t*)obj(); } | |
| 118 operator PromotedObject* () const { return (PromotedObject*)obj(); } | |
| 119 operator markOop () const { return markOop(obj()); } | |
| 120 | |
| 121 operator address () const { return (address)obj(); } | |
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122 operator intptr_t () const volatile { return (intptr_t)obj(); } |
| 0 | 123 |
| 124 // from javaCalls.cpp | |
| 125 operator jobject () const { return (jobject)obj(); } | |
| 126 // from javaClasses.cpp | |
| 127 operator JavaThread* () const { return (JavaThread*)obj(); } | |
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128 |
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129 #ifndef _LP64 |
| 0 | 130 // from jvm.cpp |
| 131 operator jlong* () const { return (jlong*)obj(); } | |
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132 #endif |
| 0 | 133 |
| 134 // from parNewGeneration and other things that want to get to the end of | |
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135 // an oop for stuff (like ObjArrayKlass.cpp) |
| 0 | 136 operator oop* () const { return (oop *)obj(); } |
| 137 }; | |
| 138 | |
| 139 #define DEF_OOP(type) \ | |
| 140 class type##OopDesc; \ | |
| 141 class type##Oop : public oop { \ | |
| 142 public: \ | |
| 143 type##Oop() : oop() {} \ | |
| 144 type##Oop(const volatile oop& o) : oop(o) {} \ | |
| 145 type##Oop(const void* p) : oop(p) {} \ | |
| 146 operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \ | |
| 147 type##OopDesc* operator->() const { \ | |
| 148 return (type##OopDesc*)obj(); \ | |
| 149 } \ | |
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150 }; |
| 0 | 151 |
| 152 DEF_OOP(instance); | |
| 153 DEF_OOP(array); | |
| 154 DEF_OOP(objArray); | |
| 155 DEF_OOP(typeArray); | |
| 156 | |
| 157 #endif // CHECK_UNHANDLED_OOPS | |
| 158 | |
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159 // The metadata hierarchy is separate from the oop hierarchy |
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160 |
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161 // class MetaspaceObj |
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162 class ConstMethod; |
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163 class ConstantPoolCache; |
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164 class MethodData; |
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165 // class Metadata |
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166 class Method; |
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167 class ConstantPool; |
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168 // class CHeapObj |
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169 class CompiledICHolder; |
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170 |
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171 |
| 0 | 172 // The klass hierarchy is separate from the oop hierarchy. |
| 173 | |
| 174 class Klass; | |
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175 class InstanceKlass; |
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176 class InstanceMirrorKlass; |
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177 class InstanceClassLoaderKlass; |
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178 class InstanceRefKlass; |
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179 class ArrayKlass; |
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180 class ObjArrayKlass; |
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181 class TypeArrayKlass; |
| 1972 | 182 |
| 183 #endif // SHARE_VM_OOPS_OOPSHIERARCHY_HPP |