jdk8-mips64-public/hotspot: src/share/vm/oops/symbolKlass.hpp@5f24d0319e54

4360113: Evict nmethods when code cache gets full
Summary: Speculatively unload the oldest nmethods when code cache gets full.
Reviewed-by: never, kvn
Contributed-by: eric.caspole@amd.com

     1 /*

     2  * Copyright 1997-2006 Sun Microsystems, Inc.  All Rights Reserved.

     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  */

    25 // a symbolKlass is the klass for a symbolOop

    27 class symbolKlass : public Klass {

    28   friend class VMStructs;

    29  private:

    30   juint    _alloc_size;        // allocation profiling support

    31  public:

    32   // Allocation

    33   DEFINE_ALLOCATE_PERMANENT(symbolKlass);

    34   static klassOop create_klass(TRAPS);

    35   symbolOop allocate_symbol(u1* name, int len, TRAPS);   // Assumes no characters larger than 0x7F

    36   bool allocate_symbols(int names_count, const char** names, int* lengths, symbolOop* sym_oops, TRAPS);

    38   // Test operation

    39   bool oop_is_symbol() const { return true; }

    41   // Casting from klassOop

    42   static symbolKlass* cast(klassOop k) {

    43     assert(k->klass_part()->oop_is_symbol(), "cast to symbolKlass");

    44     return (symbolKlass*) k->klass_part();

    45   }

    47   static int header_size()       { return oopDesc::header_size() + sizeof(symbolKlass)/HeapWordSize; }

    48   int oop_size(oop obj) const;

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

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

    52     // Garbage collection

    53   void oop_follow_contents(oop obj);

    54   int  oop_adjust_pointers(oop obj);

    55   bool oop_is_parsable(oop obj) const;

    57   // Parallel Scavenge and Parallel Old

    58   PARALLEL_GC_DECLS

    60   // Allocation profiling support

    61   juint alloc_size() const              { return _alloc_size; }

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

    64   // Iterators

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

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

    68   // Printing

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

    70 #ifndef PRODUCT

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

    72 #endif //PRODUCT

    73   const char* internal_name() const;

    74 };

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

src/share/vm/oops/symbolKlass.hpp@5f24d0319e54

src/share/vm/oops/symbolKlass.hpp