Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/oops/metadata.hpp@f90c822e73f8 (annotated)
src/share/vm/oops/metadata.hpp
Wed, 27 Apr 2016 01:25:04 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:25:04 +0800
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_OOPS_METADATA_HPP |
| aoqi@0 | 26 | #define SHARE_VM_OOPS_METADATA_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "utilities/exceptions.hpp" |
| aoqi@0 | 29 | #include "utilities/globalDefinitions.hpp" |
| aoqi@0 | 30 | #include "utilities/ostream.hpp" |
| aoqi@0 | 31 | |
| aoqi@0 | 32 | // This is the base class for an internal Class related metadata |
| aoqi@0 | 33 | class Metadata : public MetaspaceObj { |
| aoqi@0 | 34 | // Debugging hook to check that the metadata has not been deleted. |
| aoqi@0 | 35 | NOT_PRODUCT(int _valid;) |
| aoqi@0 | 36 | public: |
| aoqi@0 | 37 | NOT_PRODUCT(Metadata() { _valid = 0; }) |
| aoqi@0 | 38 | NOT_PRODUCT(bool is_valid() const volatile { return _valid == 0; }) |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | int identity_hash() { return (int)(uintptr_t)this; } |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | // Rehashing support for tables containing pointers to this |
| aoqi@0 | 43 | unsigned int new_hash(juint seed) { ShouldNotReachHere(); return 0; } |
| aoqi@0 | 44 | |
| aoqi@0 | 45 | virtual bool is_metadata() const volatile { return true; } |
| aoqi@0 | 46 | virtual bool is_klass() const volatile { return false; } |
| aoqi@0 | 47 | virtual bool is_method() const volatile { return false; } |
| aoqi@0 | 48 | virtual bool is_methodData() const volatile { return false; } |
| aoqi@0 | 49 | virtual bool is_constantPool() const volatile { return false; } |
| aoqi@0 | 50 | |
| aoqi@0 | 51 | virtual const char* internal_name() const = 0; |
| aoqi@0 | 52 | |
| aoqi@0 | 53 | void print() const { print_on(tty); } |
| aoqi@0 | 54 | void print_value() const { print_value_on(tty); } |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | void print_maybe_null() const { print_on_maybe_null(tty); } |
| aoqi@0 | 57 | void print_on_maybe_null(outputStream* st) const { |
| aoqi@0 | 58 | if (this == NULL) |
| aoqi@0 | 59 | st->print("NULL"); |
| aoqi@0 | 60 | else |
| aoqi@0 | 61 | print_on(tty); |
| aoqi@0 | 62 | } |
| aoqi@0 | 63 | void print_value_on_maybe_null(outputStream* st) const { |
| aoqi@0 | 64 | if (this == NULL) |
| aoqi@0 | 65 | st->print("NULL"); |
| aoqi@0 | 66 | else |
| aoqi@0 | 67 | print_value_on(tty); |
| aoqi@0 | 68 | } |
| aoqi@0 | 69 | |
| aoqi@0 | 70 | virtual void print_on(outputStream* st) const; // First level print |
| aoqi@0 | 71 | virtual void print_value_on(outputStream* st) const = 0; // Second level print |
| aoqi@0 | 72 | |
| aoqi@0 | 73 | char* print_value_string() const; |
| aoqi@0 | 74 | |
| aoqi@0 | 75 | // Used to keep metadata alive during class redefinition |
| aoqi@0 | 76 | // Can't assert because is called for delete functions (as an assert) |
| aoqi@0 | 77 | virtual bool on_stack() const { return false; } |
| aoqi@0 | 78 | virtual void set_on_stack(const bool value); |
| aoqi@0 | 79 | |
| aoqi@0 | 80 | // Set on_stack bit, so that the metadata is not cleared |
| aoqi@0 | 81 | // during class redefinition. This is a virtual call because only methods |
| aoqi@0 | 82 | // and constant pools need to be set, but someday instanceKlasses might also. |
| aoqi@0 | 83 | static void mark_on_stack(Metadata* m) { m->set_on_stack(true); } |
| aoqi@0 | 84 | }; |
| aoqi@0 | 85 | |
| aoqi@0 | 86 | #endif // SHARE_VM_OOPS_METADATA_HPP |
