1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/oops/metadata.hpp Sat Sep 01 13:25:18 2012 -0400
1.3 @@ -0,0 +1,85 @@
1.4 +/*
1.5 + * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_OOPS_METADATA_HPP
1.29 +#define SHARE_VM_OOPS_METADATA_HPP
1.30 +
1.31 +#include "utilities/exceptions.hpp"
1.32 +#include "utilities/globalDefinitions.hpp"
1.33 +#include "utilities/ostream.hpp"
1.34 +
1.35 +// This is the base class for an internal Class related metadata
1.36 +class Metadata : public MetaspaceObj {
1.37 + // Debugging hook to check that the metadata has not been deleted.
1.38 + NOT_PRODUCT(int _valid;)
1.39 + public:
1.40 + NOT_PRODUCT(Metadata() { _valid = 0; })
1.41 + NOT_PRODUCT(bool is_valid() const volatile { return _valid == 0; })
1.42 +
1.43 + int identity_hash() { return (int)(uintptr_t)this; }
1.44 +
1.45 + // Rehashing support for tables containing pointers to this
1.46 + unsigned int new_hash(jint seed) { ShouldNotReachHere(); return 0; }
1.47 +
1.48 + virtual bool is_klass() const volatile { return false; }
1.49 + virtual bool is_method() const volatile { return false; }
1.50 + virtual bool is_methodData() const volatile { return false; }
1.51 + virtual bool is_constantPool() const volatile { return false; }
1.52 +
1.53 + virtual const char* internal_name() const = 0;
1.54 +
1.55 + void print() const { print_on(tty); }
1.56 + void print_value() const { print_value_on(tty); }
1.57 +
1.58 + void print_maybe_null() const { print_on_maybe_null(tty); }
1.59 + void print_on_maybe_null(outputStream* st) const {
1.60 + if (this == NULL)
1.61 + st->print("NULL");
1.62 + else
1.63 + print_on(tty);
1.64 + }
1.65 + void print_value_on_maybe_null(outputStream* st) const {
1.66 + if (this == NULL)
1.67 + st->print("NULL");
1.68 + else
1.69 + print_value_on(tty);
1.70 + }
1.71 +
1.72 + virtual void print_on(outputStream* st) const; // First level print
1.73 + virtual void print_value_on(outputStream* st) const = 0; // Second level print
1.74 +
1.75 + char* print_value_string() const;
1.76 +
1.77 + // Used to keep metadata alive during class redefinition
1.78 + // Can't assert because is called for delete functions (as an assert)
1.79 + virtual bool on_stack() const { return false; }
1.80 + virtual void set_on_stack(const bool value);
1.81 +
1.82 + // Set on_stack bit, so that the metadata is not cleared
1.83 + // during class redefinition. This is a virtual call because only methods
1.84 + // and constant pools need to be set, but someday instanceKlasses might also.
1.85 + static void mark_on_stack(Metadata* m) { m->set_on_stack(true); }
1.86 +};
1.87 +
1.88 +#endif // SHARE_VM_OOPS_METADATA_HPP
