jdk8-mips64-public/hotspot: src/share/vm/oops/metadata.hpp@6a51fc70a15e

8006613: adding reason to made_not_compilable
Reviewed-by: kvn, vlivanov
Contributed-by: Igor Ignatyev <igor.ignatyev@oracle.com>

     1 /*

     2  * Copyright (c) 2011, 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_OOPS_METADATA_HPP

    26 #define SHARE_VM_OOPS_METADATA_HPP

    28 #include "utilities/exceptions.hpp"

    29 #include "utilities/globalDefinitions.hpp"

    30 #include "utilities/ostream.hpp"

    32 // This is the base class for an internal Class related metadata

    33 class Metadata : public MetaspaceObj {

    34   // Debugging hook to check that the metadata has not been deleted.

    35   NOT_PRODUCT(int _valid;)

    36  public:

    37   NOT_PRODUCT(Metadata()     { _valid = 0; })

    38   NOT_PRODUCT(bool is_valid() const volatile { return _valid == 0; })

    40   int identity_hash()                { return (int)(uintptr_t)this; }

    42   // Rehashing support for tables containing pointers to this

    43   unsigned int new_hash(jint seed)   { ShouldNotReachHere();  return 0; }

    45   virtual bool is_klass()              const volatile { return false; }

    46   virtual bool is_method()             const volatile { return false; }

    47   virtual bool is_methodData()         const volatile { return false; }

    48   virtual bool is_constantPool()       const volatile { return false; }

    50   virtual const char* internal_name()  const = 0;

    52   void print()       const { print_on(tty); }

    53   void print_value() const { print_value_on(tty); }

    55   void print_maybe_null() const { print_on_maybe_null(tty); }

    56   void print_on_maybe_null(outputStream* st) const {

    57     if (this == NULL)

    58       st->print("NULL");

    59     else

    60       print_on(tty);

    61   }

    62   void print_value_on_maybe_null(outputStream* st) const {

    63     if (this == NULL)

    64       st->print("NULL");

    65     else

    66       print_value_on(tty);

    67   }

    69   virtual void print_on(outputStream* st) const;       // First level print

    70   virtual void print_value_on(outputStream* st) const = 0; // Second level print

    72   char* print_value_string() const;

    74   // Used to keep metadata alive during class redefinition

    75   // Can't assert because is called for delete functions (as an assert)

    76   virtual bool on_stack() const { return false; }

    77   virtual void set_on_stack(const bool value);

    79   // Set on_stack bit, so that the metadata is not cleared

    80   // during class redefinition.  This is a virtual call because only methods

    81   // and constant pools need to be set, but someday instanceKlasses might also.

    82   static void mark_on_stack(Metadata* m) { m->set_on_stack(true); }

    83 };

    85 #endif // SHARE_VM_OOPS_METADATA_HPP

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