1 /*
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 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 5  * This code is free software; you can redistribute it and/or modify it
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 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).
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24 
25 #ifndef SHARE_OOPS_INSTANCEKLASSMISCSTATUS_HPP
26 #define SHARE_OOPS_INSTANCEKLASSMISCSTATUS_HPP
27 
28 class ClassLoaderData;
29 
30 class InstanceKlassMiscStatus {
31   friend class VMStructs;
32   friend class JVMCIVMStructs;
33 
34 #define IK_FLAGS_DO(flag)  \
35     flag(rewritten                          , 1 << 0) /* methods rewritten. */ \
36     flag(has_nonstatic_fields               , 1 << 1) /* for sizing with UseCompressedOops */ \
37     flag(should_verify_class                , 1 << 2) /* allow caching of preverification */ \
38     flag(unused                             , 1 << 3) /* not currently used */ \
39     flag(is_contended                       , 1 << 4) /* marked with contended annotation */ \
40     flag(has_nonstatic_concrete_methods     , 1 << 5) /* class/superclass/implemented interfaces has non-static, concrete methods */ \
41     flag(declares_nonstatic_concrete_methods, 1 << 6) /* directly declares non-static, concrete methods */ \
42     flag(has_been_redefined                 , 1 << 7) /* class has been redefined */ \
43     flag(shared_loading_failed              , 1 << 8) /* class has been loaded from shared archive */ \
44     flag(is_scratch_class                   , 1 << 9) /* class is the redefined scratch class */ \
45     flag(is_shared_boot_class               , 1 << 10) /* defining class loader is boot class loader */ \
46     flag(is_shared_platform_class           , 1 << 11) /* defining class loader is platform class loader */ \
47     flag(is_shared_app_class                , 1 << 12) /* defining class loader is app class loader */ \
48     flag(has_contended_annotations          , 1 << 13) /* has @Contended annotation */
49 
50 #define IK_FLAGS_ENUM_NAME(name, value)    _misc_##name = value,
51   enum {
52     IK_FLAGS_DO(IK_FLAGS_ENUM_NAME)
53   };
54 #undef IK_FLAGS_ENUM_NAME
55 
56   u2 shared_loader_type_bits() const {
57     return _misc_is_shared_boot_class|_misc_is_shared_platform_class|_misc_is_shared_app_class;
58   }
59 
60   // These flags are write-once before the class is published and then read-only so don't require atomic updates.
61   u2 _flags;
62 
63  public:
64 
65   InstanceKlassMiscStatus() : _flags(0) {}
66 
67   // Create getters and setters for the flag values.
68 #define IK_FLAGS_GET(name, ignore)          \
69   bool name() const { return (_flags & _misc_##name) != 0; }
70   IK_FLAGS_DO(IK_FLAGS_GET)
71 #undef IK_FLAGS_GET
72 
73 #define IK_FLAGS_SET(name, ignore)   \
74   void set_##name(bool b) {         \
75     assert(!name(), "set once");    \
76     if (b) _flags |= _misc_##name; \
77   }
78   IK_FLAGS_DO(IK_FLAGS_SET)
79 #undef IK_FLAGS_SET
80 
81   bool is_shared_unregistered_class() const {
82     return (_flags & shared_loader_type_bits()) == 0;
83   }
84 
85   void set_shared_class_loader_type(s2 loader_type);
86 
87   void assign_class_loader_type(const ClassLoaderData* cld);
88 };
89 
90 #endif // SHARE_OOPS_INSTANCEKLASSMISCSTATUS_HPP