jdk8-mips64-public/hotspot: src/share/vm/ci/ciMetadata.hpp@da91efe96a93

6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

     1 /*

     2  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_CI_CIMETADATA_HPP

    26 #define SHARE_VM_CI_CIMETADATA_HPP

    28 #include "ci/ciBaseObject.hpp"

    29 #include "ci/ciClassList.hpp"

    30 #include "memory/allocation.hpp"

    31 #include "runtime/handles.hpp"

    32 #include "runtime/jniHandles.hpp"

    34 // ciMetadata

    35 //

    36 // Compiler interface to metadata object in the VM, not Java object.

    38 class ciMetadata: public ciBaseObject {

    39   CI_PACKAGE_ACCESS

    40   friend class ciEnv;

    42  protected:

    43   Metadata* _metadata;

    45   ciMetadata(): _metadata(NULL) {}

    46   ciMetadata(Metadata* o): _metadata(o) {}

    48   virtual bool is_classless() const         { return false; }

    49  public:

    50   bool is_loaded() const { return _metadata != NULL || is_classless(); }

    52   virtual bool is_metadata() const          { return true; }

    54   virtual bool is_type() const              { return false; }

    55   virtual bool is_cpcache() const           { return false; }

    56   virtual bool is_return_address() const    { return false; }

    57   virtual bool is_method() const            { return false; }

    58   virtual bool is_method_data() const       { return false; }

    59   virtual bool is_klass() const             { return false; }

    60   virtual bool is_instance_klass() const    { return false; }

    61   virtual bool is_array_klass() const       { return false; }

    62   virtual bool is_obj_array_klass() const   { return false; }

    63   virtual bool is_type_array_klass() const  { return false; }

    65   ciMethod*                as_method() {

    66     assert(is_method(), "bad cast");

    67     return (ciMethod*)this;

    68   }

    69   ciMethodData*            as_method_data() {

    70     assert(is_method_data(), "bad cast");

    71     return (ciMethodData*)this;

    72   }

    73   ciSymbol*                as_symbol() {

    74     assert(is_symbol(), "bad cast");

    75     return (ciSymbol*)this;

    76   }

    77   ciType*                  as_type() {

    78     assert(is_type(), "bad cast");

    79     return (ciType*)this;

    80   }

    81   ciReturnAddress*         as_return_address() {

    82     assert(is_return_address(), "bad cast");

    83     return (ciReturnAddress*)this;

    84   }

    85   ciKlass*                 as_klass() {

    86     assert(is_klass(), "bad cast");

    87     return (ciKlass*)this;

    88   }

    89   ciInstanceKlass*         as_instance_klass() {

    90     assert(is_instance_klass(), "bad cast");

    91     return (ciInstanceKlass*)this;

    92   }

    93   ciArrayKlass*            as_array_klass() {

    94     assert(is_array_klass(), "bad cast");

    95     return (ciArrayKlass*)this;

    96   }

    97   ciObjArrayKlass*         as_obj_array_klass() {

    98     assert(is_obj_array_klass(), "bad cast");

    99     return (ciObjArrayKlass*)this;

   100   }

   101   ciTypeArrayKlass*        as_type_array_klass() {

   102     assert(is_type_array_klass(), "bad cast");

   103     return (ciTypeArrayKlass*)this;

   104   }

   106   Metadata* constant_encoding() { return _metadata; }

   108   bool equals(ciMetadata* obj) const { return (this == obj); }

   110   int hash() { return ident() * 31; } // ???

   112   void print(outputStream* st);

   113   virtual void print_impl(outputStream* st) {}

   114   virtual const char* type_string() { return "ciMetadata"; }

   116   void print()  { print(tty); }

   117   void print_metadata(outputStream* st = tty);

   119 };

   120 #endif // SHARE_VM_CI_CIMETADATA_HPP

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

src/share/vm/ci/ciMetadata.hpp@da91efe96a93

src/share/vm/ci/ciMetadata.hpp