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annotate src/os/aix/vm/loadlib_aix.hpp @ 21947:9f70fc90169d

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Truffle: remove expensive assertion
author Andreas Woess <andreas.woess@oracle.com>
date Wed, 17 Jun 2015 04:09:30 +0200
parents 666e6ce3976c
children
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1 /*
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2 * Copyright 2012, 2013 SAP AG. 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
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26 // Loadlib_aix.cpp contains support code for analysing the memory
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27 // layout of loaded binaries in ones own process space.
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28 //
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29 // It is needed, among other things, to provide a dladdr() emulation, because
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30 // that one is not provided by AIX
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31
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32 #ifndef OS_AIX_VM_LOADLIB_AIX_HPP
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33 #define OS_AIX_VM_LOADLIB_AIX_HPP
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34
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35 class outputStream;
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36
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37 // This class holds information about a single loaded library module.
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38 // Note that on AIX, a single library can be spread over multiple
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39 // uintptr_t range on a module base, eg.
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40 // libC.a(shr3_64.o) or libC.a(shrcore_64.o).
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41 class LoadedLibraryModule {
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42
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43 friend class LoadedLibraries;
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44
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45 char fullpath[512]; // eg /usr/lib/libC.a
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46 char shortname[30]; // eg libC.a
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47 char membername[30]; // eg shrcore_64.o
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48 const unsigned char* text_from;
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49 const unsigned char* text_to;
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50 const unsigned char* data_from;
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51 const unsigned char* data_to;
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52
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53 public:
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54
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55 const char* get_fullpath() const {
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56 return fullpath;
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57 }
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58 const char* get_shortname() const {
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59 return shortname;
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60 }
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61 const char* get_membername() const {
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62 return membername;
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63 }
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64
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65 // text_from, text_to: returns the range of the text (code)
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66 // segment for that module
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67 const unsigned char* get_text_from() const {
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68 return text_from;
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69 }
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70 const unsigned char* get_text_to() const {
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71 return text_to;
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72 }
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73
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74 // data_from/data_to: returns the range of the data
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75 // segment for that module
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76 const unsigned char* get_data_from() const {
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77 return data_from;
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78 }
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79 const unsigned char* get_data_to() const {
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80 return data_to;
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81 }
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82
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83 // returns true if the
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84 bool is_in_text(const unsigned char* p) const {
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85 return p >= text_from && p < text_to ? true : false;
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86 }
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87
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88 bool is_in_data(const unsigned char* p) const {
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89 return p >= data_from && p < data_to ? true : false;
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90 }
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91
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92 // output debug info
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93 void print(outputStream* os) const;
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94
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95 }; // end LoadedLibraryModule
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96
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97 // This class is a singleton holding a map of all loaded binaries
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98 // in the AIX process space.
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99 class LoadedLibraries
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100 // : AllStatic (including allocation.hpp just for AllStatic is overkill.)
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101 {
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102
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103 private:
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104
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105 enum {MAX_MODULES = 100};
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106 static LoadedLibraryModule tab[MAX_MODULES];
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107 static int num_loaded;
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108
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109 public:
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110
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111 // rebuild the internal table of LoadedLibraryModule objects
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112 static void reload();
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113
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114 // checks whether the address p points to any of the loaded code segments.
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115 // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
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116 static const LoadedLibraryModule* find_for_text_address(const unsigned char* p);
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117
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118 // checks whether the address p points to any of the loaded data segments.
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119 // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
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120 static const LoadedLibraryModule* find_for_data_address(const unsigned char* p);
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121
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122 // output debug info
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123 static void print(outputStream* os);
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124
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125 }; // end LoadedLibraries
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126
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127
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128 #endif // OS_AIX_VM_LOADLIB_AIX_HPP