1 /*
   2  * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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.
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   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
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  24 
  25 #ifndef SHARE_VM_CODE_RELOCINFO_EXT_HPP
  26 #define SHARE_VM_CODE_RELOCINFO_EXT_HPP
  27 
  28 // symbolic_Relocation allows to anotate some addresses in the generated code.
  29 //
  30 // This class was initially defined using the last unused relocType. The
  31 // new version tries to limit the impact on open source code changes.
  32 //
  33 // Without compiled code support, symbolic_Relocation need not be a real
  34 // relocation. To avoid using the last unused relocType, the
  35 // symbolic_Relocation::spec(<any symbolic type>) has been replaced
  36 // by additional methods using directly the symbolic type.
  37 //
  38 // Note: the order of the arguments in some methods had to reversed
  39 // to avoid confusion between the relocType enum and the
  40 // symbolic_reference enum.
  41 class symbolic_Relocation : AllStatic {
  42 
  43  public:
  44   enum symbolic_reference {
  45     card_table_reference,
  46     eden_top_reference,
  47     heap_end_reference,
  48     polling_page_reference,
  49     mark_bits_reference,
  50     mark_mask_reference,
  51     oop_bits_reference,
  52     oop_mask_reference,
  53     debug_string_reference,
  54     last_symbolic_reference
  55   };
  56 
  57   // get the new value for a given symbolic type
  58   static address symbolic_value(symbolic_reference t);
  59 };
  60 
  61 #endif // SHARE_VM_CODE_RELOCINFO_EXT_HPP