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annotate src/share/vm/utilities/elfSymbolTable.hpp @ 2177:3582bf76420e

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6990754: Use native memory and reference counting to implement SymbolTable Summary: move symbols from permgen into C heap and reference count them Reviewed-by: never, acorn, jmasa, stefank
author coleenp
date Thu, 27 Jan 2011 16:11:27 -0800
parents 2d4762ec74af
children f08d439fab8c
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1 /*
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2 * Copyright (c) 1997, 2010, 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 __ELF_SYMBOL_TABLE_HPP
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26 #define __ELF_SYMBOL_TABLE_HPP
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27
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28 #ifndef _WINDOWS
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29
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30
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31 #include "memory/allocation.hpp"
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32 #include "utilities/decoder.hpp"
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33 #include "utilities/elfFile.hpp"
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34
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35 /*
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36 * symbol table object represents a symbol section in an elf file.
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37 * Whenever possible, it will load all symbols from the corresponding section
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38 * of the elf file into memory. Otherwise, it will walk the section in file
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39 * to look up the symbol that nearest the given address.
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40 */
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41 class ElfSymbolTable: public CHeapObj {
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42 friend class ElfFile;
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43 public:
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44 ElfSymbolTable(FILE* file, Elf_Shdr shdr);
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45 ~ElfSymbolTable();
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46
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47 // search the symbol that is nearest to the specified address.
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48 Decoder::decoder_status lookup(address addr, int* stringtableIndex, int* posIndex, int* offset);
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49
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50 Decoder::decoder_status get_status() { return m_status; };
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51
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52 protected:
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53 ElfSymbolTable* m_next;
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54
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55 // holds a complete symbol table section if
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56 // can allocate enough memory
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57 Elf_Sym* m_symbols;
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58
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59 // file contains string table
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60 FILE* m_file;
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61
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62 // section header
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63 Elf_Shdr m_shdr;
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64
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65 Decoder::decoder_status m_status;
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66 };
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67
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68 #endif // _WINDOWS
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69
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70 #endif // __ELF_SYMBOL_TABLE_HPP
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73