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annotate src/share/vm/oops/metadata.hpp @ 12356:359f7e70ae7f

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Reduce HotSpot diff and fix previous merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Fri, 11 Oct 2013 15:41:33 +0200
parents da91efe96a93
children cd6b3f1a94ff
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1 /*
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2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_OOPS_METADATA_HPP
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26 #define SHARE_VM_OOPS_METADATA_HPP
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27
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28 #include "utilities/exceptions.hpp"
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29 #include "utilities/globalDefinitions.hpp"
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30 #include "utilities/ostream.hpp"
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31
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32 // This is the base class for an internal Class related metadata
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33 class Metadata : public MetaspaceObj {
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34 // Debugging hook to check that the metadata has not been deleted.
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35 NOT_PRODUCT(int _valid;)
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36 public:
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37 NOT_PRODUCT(Metadata() { _valid = 0; })
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38 NOT_PRODUCT(bool is_valid() const volatile { return _valid == 0; })
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39
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40 int identity_hash() { return (int)(uintptr_t)this; }
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41
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42 // Rehashing support for tables containing pointers to this
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43 unsigned int new_hash(jint seed) { ShouldNotReachHere(); return 0; }
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44
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45 virtual bool is_klass() const volatile { return false; }
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46 virtual bool is_method() const volatile { return false; }
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47 virtual bool is_methodData() const volatile { return false; }
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48 virtual bool is_constantPool() const volatile { return false; }
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49
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50 virtual const char* internal_name() const = 0;
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51
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52 void print() const { print_on(tty); }
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53 void print_value() const { print_value_on(tty); }
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54
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55 void print_maybe_null() const { print_on_maybe_null(tty); }
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56 void print_on_maybe_null(outputStream* st) const {
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57 if (this == NULL)
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58 st->print("NULL");
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59 else
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60 print_on(tty);
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61 }
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62 void print_value_on_maybe_null(outputStream* st) const {
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63 if (this == NULL)
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64 st->print("NULL");
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65 else
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66 print_value_on(tty);
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67 }
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68
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69 virtual void print_on(outputStream* st) const; // First level print
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70 virtual void print_value_on(outputStream* st) const = 0; // Second level print
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71
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72 char* print_value_string() const;
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73
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74 // Used to keep metadata alive during class redefinition
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75 // Can't assert because is called for delete functions (as an assert)
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76 virtual bool on_stack() const { return false; }
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77 virtual void set_on_stack(const bool value);
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78
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79 // Set on_stack bit, so that the metadata is not cleared
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80 // during class redefinition. This is a virtual call because only methods
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81 // and constant pools need to be set, but someday instanceKlasses might also.
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82 static void mark_on_stack(Metadata* m) { m->set_on_stack(true); }
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83 };
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84
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85 #endif // SHARE_VM_OOPS_METADATA_HPP