jdk8-mips64-public/hotspot: src/share/vm/oops/cpCacheKlass.hpp@c5a923563727

6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?")
Summary: Fix block_size_if_printezis_bits() so it does not expect the bits, only uses them when available. Fix block_size_no_stall() so it does not stall when the bits are missing such cases, letting the caller deal with zero size returns. Constant pool cache oops do not need to be unparsable or conc_unsafe after their klass pointer is installed. Some cosmetic clean-ups and some assertion checking for conc-usafety which, in the presence of class file redefinition, has no a-priori time boundedness, so all GCs must be able to safely deal with putatively conc-unsafe objects in a stop-world pause.
Reviewed-by: jmasa, johnc

     1 /*

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     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.

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     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  *

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    25 #ifndef SHARE_VM_OOPS_CPCACHEKLASS_HPP

    26 #define SHARE_VM_OOPS_CPCACHEKLASS_HPP

    28 #include "oops/arrayKlass.hpp"

    29 #include "oops/cpCacheOop.hpp"

    30 #include "oops/instanceKlass.hpp"

    32 class constantPoolCacheKlass: public Klass {

    33   juint    _alloc_size;        // allocation profiling support

    34  public:

    35   // Dispatched klass operations

    36   bool oop_is_constantPoolCache() const          { return true; }

    37   int  oop_size(oop obj) const;

    38   int  klass_oop_size() const                    { return object_size(); }

    40   // Allocation

    41   DEFINE_ALLOCATE_PERMANENT(constantPoolCacheKlass);

    42   constantPoolCacheOop allocate(int length, TRAPS);

    43   static klassOop create_klass(TRAPS);

    45   // Casting from klassOop

    46   static constantPoolCacheKlass* cast(klassOop k) {

    47     assert(k->klass_part()->oop_is_constantPoolCache(), "cast to constantPoolCacheKlass");

    48     return (constantPoolCacheKlass*)k->klass_part();

    49   }

    51   // Sizing

    52   static int header_size()       { return oopDesc::header_size() + sizeof(constantPoolCacheKlass)/HeapWordSize; }

    53   int object_size() const        { return align_object_size(header_size()); }

    55   // Garbage collection

    56   void oop_follow_contents(oop obj);

    57   int oop_adjust_pointers(oop obj);

    59   // Parallel Scavenge and Parallel Old

    60   PARALLEL_GC_DECLS

    62   // Iterators

    63   int oop_oop_iterate(oop obj, OopClosure* blk);

    64   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);

    66   // Allocation profiling support

    67   juint alloc_size() const              { return _alloc_size; }

    68   void set_alloc_size(juint n)          { _alloc_size = n; }

    70   // Printing

    71   void oop_print_value_on(oop obj, outputStream* st);

    72   void oop_print_on(oop obj, outputStream* st);

    74   // Verification

    75   const char* internal_name() const;

    76   void oop_verify_on(oop obj, outputStream* st);

    77 };

    79 #endif // SHARE_VM_OOPS_CPCACHEKLASS_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/oops/cpCacheKlass.hpp@c5a923563727

src/share/vm/oops/cpCacheKlass.hpp