1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/vm/oops/metadata.hpp Wed Apr 27 01:25:04 2016 +0800 1.3 @@ -0,0 +1,86 @@ 1.4 +/* 1.5 + * Copyright (c) 2011, 2014, 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(juint seed) { ShouldNotReachHere(); return 0; } 1.47 + 1.48 + virtual bool is_metadata() const volatile { return true; } 1.49 + virtual bool is_klass() const volatile { return false; } 1.50 + virtual bool is_method() const volatile { return false; } 1.51 + virtual bool is_methodData() const volatile { return false; } 1.52 + virtual bool is_constantPool() const volatile { return false; } 1.53 + 1.54 + virtual const char* internal_name() const = 0; 1.55 + 1.56 + void print() const { print_on(tty); } 1.57 + void print_value() const { print_value_on(tty); } 1.58 + 1.59 + void print_maybe_null() const { print_on_maybe_null(tty); } 1.60 + void print_on_maybe_null(outputStream* st) const { 1.61 + if (this == NULL) 1.62 + st->print("NULL"); 1.63 + else 1.64 + print_on(tty); 1.65 + } 1.66 + void print_value_on_maybe_null(outputStream* st) const { 1.67 + if (this == NULL) 1.68 + st->print("NULL"); 1.69 + else 1.70 + print_value_on(tty); 1.71 + } 1.72 + 1.73 + virtual void print_on(outputStream* st) const; // First level print 1.74 + virtual void print_value_on(outputStream* st) const = 0; // Second level print 1.75 + 1.76 + char* print_value_string() const; 1.77 + 1.78 + // Used to keep metadata alive during class redefinition 1.79 + // Can't assert because is called for delete functions (as an assert) 1.80 + virtual bool on_stack() const { return false; } 1.81 + virtual void set_on_stack(const bool value); 1.82 + 1.83 + // Set on_stack bit, so that the metadata is not cleared 1.84 + // during class redefinition. This is a virtual call because only methods 1.85 + // and constant pools need to be set, but someday instanceKlasses might also. 1.86 + static void mark_on_stack(Metadata* m) { m->set_on_stack(true); } 1.87 +}; 1.88 + 1.89 +#endif // SHARE_VM_OOPS_METADATA_HPP