Mercurial > hg > truffle
annotate src/os/aix/vm/loadlib_aix.cpp @ 21408:32ca2353accf
Truffle/Instrumentation: fix NPE hazard
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Sun, 17 May 2015 20:47:04 -0700 |
parents | 666e6ce3976c |
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rev | line source |
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14415
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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 // Implementation of LoadedLibraries and friends |
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27 |
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28 // Ultimately this just uses loadquery() |
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29 // See: |
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30 // http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp |
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31 // ?topic=/com.ibm.aix.basetechref/doc/basetrf1/loadquery.htm |
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32 |
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33 #ifndef __STDC_FORMAT_MACROS |
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34 #define __STDC_FORMAT_MACROS |
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35 #endif |
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36 // 'allocation.inline.hpp' triggers the inclusion of 'inttypes.h' which defines macros |
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37 // required by the definitions in 'globalDefinitions.hpp'. But these macros in 'inttypes.h' |
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38 // are only defined if '__STDC_FORMAT_MACROS' is defined! |
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39 #include "memory/allocation.inline.hpp" |
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40 #include "oops/oop.inline.hpp" |
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41 #include "runtime/threadCritical.hpp" |
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42 #include "utilities/debug.hpp" |
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43 #include "utilities/ostream.hpp" |
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44 #include "loadlib_aix.hpp" |
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45 #include "porting_aix.hpp" |
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46 |
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47 // For loadquery() |
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48 #include <sys/ldr.h> |
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49 |
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50 /////////////////////////////////////////////////////////////////////////////// |
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51 // Implementation for LoadedLibraryModule |
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52 |
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53 // output debug info |
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54 void LoadedLibraryModule::print(outputStream* os) const { |
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55 os->print("%15.15s: text: " INTPTR_FORMAT " - " INTPTR_FORMAT |
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56 ", data: " INTPTR_FORMAT " - " INTPTR_FORMAT " ", |
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57 shortname, text_from, text_to, data_from, data_to); |
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58 os->print(" %s", fullpath); |
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59 if (strlen(membername) > 0) { |
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60 os->print("(%s)", membername); |
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61 } |
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62 os->cr(); |
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63 } |
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64 |
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65 |
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66 /////////////////////////////////////////////////////////////////////////////// |
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67 // Implementation for LoadedLibraries |
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68 |
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69 // class variables |
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70 LoadedLibraryModule LoadedLibraries::tab[MAX_MODULES]; |
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71 int LoadedLibraries::num_loaded = 0; |
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72 |
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73 // Checks whether the address p points to any of the loaded code segments. |
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74 // If it does, returns the LoadedLibraryModule entry. If not, returns NULL. |
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75 // static |
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76 const LoadedLibraryModule* LoadedLibraries::find_for_text_address(const unsigned char* p) { |
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77 |
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78 if (num_loaded == 0) { |
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79 reload(); |
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80 } |
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81 for (int i = 0; i < num_loaded; i++) { |
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82 if (tab[i].is_in_text(p)) { |
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83 return &tab[i]; |
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84 } |
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85 } |
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86 return NULL; |
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87 } |
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88 |
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89 // Checks whether the address p points to any of the loaded data segments. |
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90 // If it does, returns the LoadedLibraryModule entry. If not, returns NULL. |
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91 // static |
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92 const LoadedLibraryModule* LoadedLibraries::find_for_data_address(const unsigned char* p) { |
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93 if (num_loaded == 0) { |
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94 reload(); |
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95 } |
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96 for (int i = 0; i < num_loaded; i++) { |
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97 if (tab[i].is_in_data(p)) { |
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98 return &tab[i]; |
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99 } |
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100 } |
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101 return NULL; |
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102 } |
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103 |
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104 // Rebuild the internal table of LoadedLibraryModule objects |
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105 // static |
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106 void LoadedLibraries::reload() { |
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107 |
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108 ThreadCritical cs; |
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109 |
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110 // discard old content |
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111 num_loaded = 0; |
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112 |
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113 // Call loadquery(L_GETINFO..) to get a list of all loaded Dlls from AIX. |
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114 size_t buf_size = 4096; |
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115 char* loadquery_buf = AllocateHeap(buf_size, mtInternal); |
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116 |
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117 while(loadquery(L_GETINFO, loadquery_buf, buf_size) == -1) { |
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118 if (errno == ENOMEM) { |
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119 buf_size *= 2; |
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120 loadquery_buf = ReallocateHeap(loadquery_buf, buf_size, mtInternal); |
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121 } else { |
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122 FreeHeap(loadquery_buf); |
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123 // Ensure that the uintptr_t pointer is valid |
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124 assert(errno != EFAULT, "loadquery: Invalid uintptr_t in info buffer."); |
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125 fprintf(stderr, "loadquery failed (%d %s)", errno, strerror(errno)); |
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126 return; |
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127 } |
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128 } |
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129 |
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130 // Iterate over the loadquery result. For details see sys/ldr.h on AIX. |
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131 const struct ld_info* p = (struct ld_info*) loadquery_buf; |
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132 |
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133 // Ensure we have all loaded libs. |
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134 bool all_loaded = false; |
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135 while(num_loaded < MAX_MODULES) { |
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136 LoadedLibraryModule& mod = tab[num_loaded]; |
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137 mod.text_from = (const unsigned char*) p->ldinfo_textorg; |
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138 mod.text_to = (const unsigned char*) (((char*)p->ldinfo_textorg) + p->ldinfo_textsize); |
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139 mod.data_from = (const unsigned char*) p->ldinfo_dataorg; |
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140 mod.data_to = (const unsigned char*) (((char*)p->ldinfo_dataorg) + p->ldinfo_datasize); |
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141 sprintf(mod.fullpath, "%.*s", sizeof(mod.fullpath), p->ldinfo_filename); |
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142 // do we have a member name as well (see ldr.h)? |
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143 const char* p_mbr_name = p->ldinfo_filename + strlen(p->ldinfo_filename) + 1; |
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144 if (*p_mbr_name) { |
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145 sprintf(mod.membername, "%.*s", sizeof(mod.membername), p_mbr_name); |
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146 } else { |
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147 mod.membername[0] = '\0'; |
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148 } |
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149 |
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150 // fill in the short name |
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151 const char* p_slash = strrchr(mod.fullpath, '/'); |
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152 if (p_slash) { |
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153 sprintf(mod.shortname, "%.*s", sizeof(mod.shortname), p_slash + 1); |
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154 } else { |
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155 sprintf(mod.shortname, "%.*s", sizeof(mod.shortname), mod.fullpath); |
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156 } |
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157 num_loaded ++; |
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158 |
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159 // next entry... |
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160 if (p->ldinfo_next) { |
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161 p = (struct ld_info*)(((char*)p) + p->ldinfo_next); |
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162 } else { |
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163 all_loaded = true; |
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164 break; |
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165 } |
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166 } |
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167 |
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168 FreeHeap(loadquery_buf); |
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169 |
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170 // Ensure we have all loaded libs |
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171 assert(all_loaded, "loadquery returned more entries then expected. Please increase MAX_MODULES"); |
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172 |
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173 } // end LoadedLibraries::reload() |
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174 |
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175 |
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176 // output loaded libraries table |
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177 //static |
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178 void LoadedLibraries::print(outputStream* os) { |
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179 |
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180 for (int i = 0; i < num_loaded; i++) { |
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181 tab[i].print(os); |
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182 } |
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183 |
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184 } |
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185 |