Fri, 20 Sep 2013 09:30:02 -0400
8022887: Assertion hit while using class and redefining it with RedefineClasses simultaneously
Summary: Need to refetch each method from InstanceKlass after all safepoints. Removed leaky PreviousVersionInfo code.
Reviewed-by: dcubed, sspitsyn
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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13 * accompanied this code).
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25 #ifndef SHARE_VM_OOPS_OOPSHIERARCHY_HPP
26 #define SHARE_VM_OOPS_OOPSHIERARCHY_HPP
28 #include "runtime/globals.hpp"
29 #include "utilities/globalDefinitions.hpp"
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.
35 typedef juint narrowOop; // Offset instead of address for an oop within a java object
37 // If compressed klass pointers then use narrowKlass.
38 typedef juint narrowKlass;
40 typedef void* OopOrNarrowOopStar;
41 typedef class markOopDesc* markOop;
43 #ifndef CHECK_UNHANDLED_OOPS
45 typedef class oopDesc* oop;
46 typedef class instanceOopDesc* instanceOop;
47 typedef class arrayOopDesc* arrayOop;
48 typedef class objArrayOopDesc* objArrayOop;
49 typedef class typeArrayOopDesc* typeArrayOop;
51 #else
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.
67 class Thread;
68 class PromotedObject;
71 class oop {
72 oopDesc* _o;
74 void register_oop();
75 void unregister_oop();
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; }
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 }
96 oopDesc* obj() const volatile { return _o; }
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; }
102 bool operator!=(const volatile oop o) const { return obj() != o.obj(); }
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; }
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(); }
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()); }
121 operator address () const { return (address)obj(); }
122 operator intptr_t () const volatile { return (intptr_t)obj(); }
124 // from javaCalls.cpp
125 operator jobject () const { return (jobject)obj(); }
126 // from javaClasses.cpp
127 operator JavaThread* () const { return (JavaThread*)obj(); }
129 #ifndef _LP64
130 // from jvm.cpp
131 operator jlong* () const { return (jlong*)obj(); }
132 #endif
134 // from parNewGeneration and other things that want to get to the end of
135 // an oop for stuff (like ObjArrayKlass.cpp)
136 operator oop* () const { return (oop *)obj(); }
137 };
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 } \
150 };
152 DEF_OOP(instance);
153 DEF_OOP(array);
154 DEF_OOP(objArray);
155 DEF_OOP(typeArray);
157 #endif // CHECK_UNHANDLED_OOPS
159 // The metadata hierarchy is separate from the oop hierarchy
161 // class MetaspaceObj
162 class ConstMethod;
163 class ConstantPoolCache;
164 class MethodData;
165 // class Metadata
166 class Method;
167 class ConstantPool;
168 // class CHeapObj
169 class CompiledICHolder;
172 // The klass hierarchy is separate from the oop hierarchy.
174 class Klass;
175 class InstanceKlass;
176 class InstanceMirrorKlass;
177 class InstanceClassLoaderKlass;
178 class InstanceRefKlass;
179 class ArrayKlass;
180 class ObjArrayKlass;
181 class TypeArrayKlass;
183 #endif // SHARE_VM_OOPS_OOPSHIERARCHY_HPP