1 /*
2 * Copyright (c) 2011, 2014, 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 *
39
40 int identity_hash() { return (int)(uintptr_t)this; }
41
42 // Rehashing support for tables containing pointers to this
43 unsigned int new_hash(juint seed) { ShouldNotReachHere(); return 0; }
44
45 virtual bool is_metadata() const volatile { return true; }
46 virtual bool is_klass() const volatile { return false; }
47 virtual bool is_method() const volatile { return false; }
48 virtual bool is_methodData() const volatile { return false; }
49 virtual bool is_constantPool() const volatile { return false; }
50 virtual bool is_methodCounters() const volatile { return false; }
51 virtual int size() const = 0;
52 virtual MetaspaceObj::Type type() const = 0;
53 virtual const char* internal_name() const = 0;
54 virtual void metaspace_pointers_do(MetaspaceClosure* iter) {}
55
56 void print() const { print_on(tty); }
57 void print_value() const { print_value_on(tty); }
58
59 void print_maybe_null() const { print_on_maybe_null(tty); }
60 void print_on_maybe_null(outputStream* st) const {
61 if (this == NULL)
62 st->print("NULL");
63 else
64 print_on(st);
65 }
66 void print_value_on_maybe_null(outputStream* st) const {
67 if (this == NULL)
68 st->print("NULL");
69 else
70 print_value_on(st);
71 }
72
73 virtual void print_on(outputStream* st) const; // First level print
74 virtual void print_value_on(outputStream* st) const = 0; // Second level print
75
76 char* print_value_string() const;
77
78 // Used to keep metadata alive during class redefinition
79 // Can't assert because is called for delete functions (as an assert)
80 virtual bool on_stack() const { return false; }
81 virtual void set_on_stack(const bool value);
82
83 // Set on_stack bit, so that the metadata is not cleared
84 // during class redefinition. This is a virtual call because only methods
85 // and constant pools need to be set, but someday instanceKlasses might also.
86 static void mark_on_stack(Metadata* m) { m->set_on_stack(true); }
87 };
88
89 #endif // SHARE_VM_OOPS_METADATA_HPP
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1 /*
2 * Copyright (c) 2011, 2018, 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 *
39
40 int identity_hash() { return (int)(uintptr_t)this; }
41
42 // Rehashing support for tables containing pointers to this
43 unsigned int new_hash(juint seed) { ShouldNotReachHere(); return 0; }
44
45 virtual bool is_metadata() const volatile { return true; }
46 virtual bool is_klass() const volatile { return false; }
47 virtual bool is_method() const volatile { return false; }
48 virtual bool is_methodData() const volatile { return false; }
49 virtual bool is_constantPool() const volatile { return false; }
50 virtual bool is_methodCounters() const volatile { return false; }
51 virtual int size() const = 0;
52 virtual MetaspaceObj::Type type() const = 0;
53 virtual const char* internal_name() const = 0;
54 virtual void metaspace_pointers_do(MetaspaceClosure* iter) {}
55
56 void print() const { print_on(tty); }
57 void print_value() const { print_value_on(tty); }
58
59 static void print_value_on_maybe_null(outputStream* st, const Metadata* m) {
60 if (m == NULL)
61 st->print("NULL");
62 else
63 m->print_value_on(st);
64 }
65
66 virtual void print_on(outputStream* st) const; // First level print
67 virtual void print_value_on(outputStream* st) const = 0; // Second level print
68
69 char* print_value_string() const;
70
71 // Used to keep metadata alive during class redefinition
72 // Can't assert because is called for delete functions (as an assert)
73 virtual bool on_stack() const { return false; }
74 virtual void set_on_stack(const bool value);
75
76 // Set on_stack bit, so that the metadata is not cleared
77 // during class redefinition. This is a virtual call because only methods
78 // and constant pools need to be set, but someday instanceKlasses might also.
79 static void mark_on_stack(Metadata* m) { m->set_on_stack(true); }
80 };
81
82 #endif // SHARE_VM_OOPS_METADATA_HPP
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