Mercurial > hg > truffle
annotate src/share/vm/utilities/elfFile.hpp @ 21244:bf5e055dbc9c
SSAUtils: minor refactoring.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 30 Apr 2015 15:36:03 +0200 |
parents | 52b4284cb496 |
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rev | line source |
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1 /* |
17524 | 2 * Copyright (c) 1997, 2013, 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 |
4803 | 25 #ifndef SHARE_VM_UTILITIES_ELF_FILE_HPP |
26 #define SHARE_VM_UTILITIES_ELF_FILE_HPP | |
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27 |
3960 | 28 #if !defined(_WINDOWS) && !defined(__APPLE__) |
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29 |
3960 | 30 #if defined(__OpenBSD__) |
31 #include <sys/exec_elf.h> | |
32 #else | |
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33 #include <elf.h> |
3960 | 34 #endif |
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35 #include <stdio.h> |
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36 |
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37 #ifdef _LP64 |
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38 |
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39 typedef Elf64_Half Elf_Half; |
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40 typedef Elf64_Word Elf_Word; |
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41 typedef Elf64_Off Elf_Off; |
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42 typedef Elf64_Addr Elf_Addr; |
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43 |
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44 typedef Elf64_Ehdr Elf_Ehdr; |
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45 typedef Elf64_Shdr Elf_Shdr; |
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46 typedef Elf64_Phdr Elf_Phdr; |
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47 typedef Elf64_Sym Elf_Sym; |
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48 |
3960 | 49 #if !defined(_ALLBSD_SOURCE) || defined(__APPLE__) |
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50 #define ELF_ST_TYPE ELF64_ST_TYPE |
3960 | 51 #endif |
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52 |
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53 #else |
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54 |
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55 typedef Elf32_Half Elf_Half; |
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56 typedef Elf32_Word Elf_Word; |
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57 typedef Elf32_Off Elf_Off; |
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58 typedef Elf32_Addr Elf_Addr; |
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59 |
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60 |
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61 typedef Elf32_Ehdr Elf_Ehdr; |
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62 typedef Elf32_Shdr Elf_Shdr; |
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63 typedef Elf32_Phdr Elf_Phdr; |
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64 typedef Elf32_Sym Elf_Sym; |
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65 |
3960 | 66 #if !defined(_ALLBSD_SOURCE) || defined(__APPLE__) |
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67 #define ELF_ST_TYPE ELF32_ST_TYPE |
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68 #endif |
3960 | 69 #endif |
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70 |
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71 #include "globalDefinitions.hpp" |
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72 #include "memory/allocation.hpp" |
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73 #include "utilities/decoder.hpp" |
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74 |
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75 |
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76 class ElfStringTable; |
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77 class ElfSymbolTable; |
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78 class ElfFuncDescTable; |
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79 |
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80 |
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81 // On Solaris/Linux platforms, libjvm.so does contain all private symbols. |
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82 // ElfFile is basically an elf file parser, which can lookup the symbol |
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83 // that is the nearest to the given address. |
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84 // Beware, this code is called from vm error reporting code, when vm is already |
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85 // in "error" state, so there are scenarios, lookup will fail. We want this |
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86 // part of code to be very defensive, and bait out if anything went wrong. |
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87 |
6197 | 88 class ElfFile: public CHeapObj<mtInternal> { |
4803 | 89 friend class ElfDecoder; |
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90 public: |
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91 ElfFile(const char* filepath); |
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92 ~ElfFile(); |
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93 |
4803 | 94 bool decode(address addr, char* buf, int buflen, int* offset); |
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95 const char* filepath() { |
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96 return m_filepath; |
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97 } |
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98 |
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99 bool same_elf_file(const char* filepath) { |
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100 assert(filepath, "null file path"); |
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101 assert(m_filepath, "already out of memory"); |
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102 return (m_filepath && !strcmp(filepath, m_filepath)); |
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103 } |
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104 |
4803 | 105 NullDecoder::decoder_status get_status() { |
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106 return m_status; |
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107 } |
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108 |
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109 private: |
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110 // sanity check, if the file is a real elf file |
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111 bool is_elf_file(Elf_Ehdr&); |
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112 |
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113 // load string tables from the elf file |
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114 bool load_tables(); |
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115 |
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116 // string tables are stored in a linked list |
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117 void add_string_table(ElfStringTable* table); |
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118 |
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119 // symbol tables are stored in a linked list |
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120 void add_symbol_table(ElfSymbolTable* table); |
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121 |
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122 // return a string table at specified section index |
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123 ElfStringTable* get_string_table(int index); |
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124 |
4803 | 125 protected: |
126 ElfFile* next() const { return m_next; } | |
127 void set_next(ElfFile* file) { m_next = file; } | |
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128 |
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129 public: |
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130 // Returns true if the elf file is marked NOT to require an executable stack, |
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131 // or if the file could not be opened. |
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132 // Returns false if the elf file requires an executable stack, the stack flag |
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133 // is not set at all, or if the file can not be read. |
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134 // On systems other than linux it always returns false. |
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135 bool specifies_noexecstack() NOT_LINUX({ return false; }); |
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136 |
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137 protected: |
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138 ElfFile* m_next; |
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139 |
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140 private: |
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141 // file |
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142 const char* m_filepath; |
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143 FILE* m_file; |
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144 |
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145 // Elf header |
4803 | 146 Elf_Ehdr m_elfHdr; |
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147 |
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148 // symbol tables |
4803 | 149 ElfSymbolTable* m_symbol_tables; |
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150 |
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151 // string tables |
4803 | 152 ElfStringTable* m_string_tables; |
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153 |
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154 // function descriptors table |
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155 ElfFuncDescTable* m_funcDesc_table; |
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156 |
4803 | 157 NullDecoder::decoder_status m_status; |
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158 }; |
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159 |
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160 #endif // !_WINDOWS && !__APPLE__ |
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161 |
4803 | 162 #endif // SHARE_VM_UTILITIES_ELF_FILE_HPP |