| /* |
| * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OOPS_METADATA_HPP |
| #define SHARE_VM_OOPS_METADATA_HPP |
| |
| #include "utilities/exceptions.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/ostream.hpp" |
| |
| // This is the base class for an internal Class related metadata |
| class Metadata : public MetaspaceObj { |
| // Debugging hook to check that the metadata has not been deleted. |
| NOT_PRODUCT(int _valid;) |
| public: |
| NOT_PRODUCT(Metadata() { _valid = 0; }) |
| NOT_PRODUCT(bool is_valid() const volatile { return _valid == 0; }) |
| |
| int identity_hash() { return (int)(uintptr_t)this; } |
| |
| // Rehashing support for tables containing pointers to this |
| unsigned int new_hash(juint seed) { ShouldNotReachHere(); return 0; } |
| |
| virtual bool is_metadata() const volatile { return true; } |
| virtual bool is_klass() const volatile { return false; } |
| virtual bool is_method() const volatile { return false; } |
| virtual bool is_methodData() const volatile { return false; } |
| virtual bool is_constantPool() const volatile { return false; } |
| virtual bool is_methodCounters() const volatile { return false; } |
| |
| virtual const char* internal_name() const = 0; |
| |
| void print() const { print_on(tty); } |
| void print_value() const { print_value_on(tty); } |
| |
| void print_maybe_null() const { print_on_maybe_null(tty); } |
| void print_on_maybe_null(outputStream* st) const { |
| if (this == NULL) |
| st->print("NULL"); |
| else |
| print_on(st); |
| } |
| void print_value_on_maybe_null(outputStream* st) const { |
| if (this == NULL) |
| st->print("NULL"); |
| else |
| print_value_on(st); |
| } |
| |
| virtual void print_on(outputStream* st) const; // First level print |
| virtual void print_value_on(outputStream* st) const = 0; // Second level print |
| |
| char* print_value_string() const; |
| |
| // Used to keep metadata alive during class redefinition |
| // Can't assert because is called for delete functions (as an assert) |
| virtual bool on_stack() const { return false; } |
| virtual void set_on_stack(const bool value); |
| |
| // Set on_stack bit, so that the metadata is not cleared |
| // during class redefinition. This is a virtual call because only methods |
| // and constant pools need to be set, but someday instanceKlasses might also. |
| static void mark_on_stack(Metadata* m) { m->set_on_stack(true); } |
| }; |
| |
| #endif // SHARE_VM_OOPS_METADATA_HPP |