Mercurial > cpython-lru_cache-weakref

annotate Python/dynload_aix.c @ 79063:2bdc8c8ea42e

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Issue #15977: Fix memory leak in Modules/_ssl.c when the function _set_npn_protocols() is called multiple times
author Christian Heimes <christian@cheimes.de>
date Thu, 20 Sep 2012 12:42:54 +0200
parents 257cbd2fac38
children c08bcf5302ec
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Support for dynamic loading of extension modules */
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3
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f99cf9bfbbaf Include Python.h first which defines _XOPEN_SOURCE
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4 #include "Python.h"
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5 #include "importdl.h"
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6
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7 #include <ctype.h> /* for isdigit() */
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8 #include <errno.h> /* for global errno */
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9 #include <string.h> /* for strerror() */
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10 #include <stdlib.h> /* for malloc(), free() */
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11 #include <sys/ldr.h>
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13
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14 #ifdef AIX_GENUINE_CPLUSPLUS
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15 #include <load.h>
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16 #define aix_load loadAndInit
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17 #else
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18 #define aix_load load
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19 #endif
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20
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21
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29da35543833 ANSIfy as many declarations as possible.
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22 extern char *Py_GetProgramName(void);
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23
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24 typedef struct Module {
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25 struct Module *next;
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26 void *entry;
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27 } Module, *ModulePtr;
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28
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29 const char *_PyImport_DynLoadFiletab[] = {".so", NULL};
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31 static int
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32 aix_getoldmodules(void **modlistptr)
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33 {
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34 register ModulePtr modptr, prevmodptr;
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35 register struct ld_info *ldiptr;
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36 register char *ldibuf;
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37 register int errflag, bufsize = 1024;
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38 register unsigned int offset;
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39 char *progname = Py_GetProgramName();
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40
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41 /*
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42 -- Get the list of loaded modules into ld_info structures.
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43 */
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44 if ((ldibuf = malloc(bufsize)) == NULL) {
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45 PyErr_SetString(PyExc_ImportError, strerror(errno));
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46 return -1;
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47 }
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48 while ((errflag = loadquery(L_GETINFO, ldibuf, bufsize)) == -1
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49 && errno == ENOMEM) {
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50 free(ldibuf);
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51 bufsize += 1024;
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52 if ((ldibuf = malloc(bufsize)) == NULL) {
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53 PyErr_SetString(PyExc_ImportError, strerror(errno));
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54 return -1;
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55 }
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56 }
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57 if (errflag == -1) {
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58 PyErr_SetString(PyExc_ImportError, strerror(errno));
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59 return -1;
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60 }
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61 /*
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62 -- Make the modules list from the ld_info structures.
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63 */
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64 ldiptr = (struct ld_info *)ldibuf;
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65 prevmodptr = NULL;
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66 do {
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67 if (strstr(progname, ldiptr->ldinfo_filename) == NULL &&
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68 strstr(ldiptr->ldinfo_filename, "python") == NULL) {
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69 /*
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70 -- Extract only the modules belonging to the main
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71 -- executable + those containing "python" as a
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72 -- substring (like the "python[version]" binary or
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73 -- "libpython[version].a" in case it's a shared lib).
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74 */
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75 offset = (unsigned int)ldiptr->ldinfo_next;
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76 ldiptr = (struct ld_info *)((char*)ldiptr + offset);
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77 continue;
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78 }
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79 if ((modptr = (ModulePtr)malloc(sizeof(Module))) == NULL) {
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80 PyErr_SetString(PyExc_ImportError, strerror(errno));
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81 while (*modlistptr) {
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82 modptr = (ModulePtr)*modlistptr;
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83 *modlistptr = (void *)modptr->next;
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84 free(modptr);
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85 }
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86 return -1;
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87 }
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88 modptr->entry = ldiptr->ldinfo_dataorg;
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89 modptr->next = NULL;
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90 if (prevmodptr == NULL)
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91 *modlistptr = (void *)modptr;
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92 else
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93 prevmodptr->next = modptr;
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94 prevmodptr = modptr;
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95 offset = (unsigned int)ldiptr->ldinfo_next;
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96 ldiptr = (struct ld_info *)((char*)ldiptr + offset);
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97 } while (offset);
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98 free(ldibuf);
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99 return 0;
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100 }
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101
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102
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103 static void
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104 aix_loaderror(const char *pathname)
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105 {
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106
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107 char *message[1024], errbuf[1024];
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108 PyObject *pathname_ob = NULL;
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109 PyObject *errbuf_ob = NULL;
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110 register int i,j;
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111
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112 struct errtab {
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113 int errNo;
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114 char *errstr;
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115 } load_errtab[] = {
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116 {L_ERROR_TOOMANY, "too many errors, rest skipped."},
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117 {L_ERROR_NOLIB, "can't load library:"},
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118 {L_ERROR_UNDEF, "can't find symbol in library:"},
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119 {L_ERROR_RLDBAD,
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120 "RLD index out of range or bad relocation type:"},
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121 {L_ERROR_FORMAT, "not a valid, executable xcoff file:"},
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122 {L_ERROR_MEMBER,
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123 "file not an archive or does not contain requested member:"},
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124 {L_ERROR_TYPE, "symbol table mismatch:"},
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125 {L_ERROR_ALIGN, "text alignment in file is wrong."},
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126 {L_ERROR_SYSTEM, "System error:"},
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127 {L_ERROR_ERRNO, NULL}
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128 };
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129
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130 #define ERRBUF_APPEND(s) strncat(errbuf, s, sizeof(errbuf)-strlen(errbuf)-1)
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131
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132 PyOS_snprintf(errbuf, sizeof(errbuf), "from module %.200s ", pathname);
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133
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134 if (!loadquery(L_GETMESSAGES, &message[0], sizeof(message))) {
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135 ERRBUF_APPEND(strerror(errno));
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136 ERRBUF_APPEND("\n");
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137 }
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138 for(i = 0; message[i] && *message[i]; i++) {
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139 int nerr = atoi(message[i]);
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Victor Stinner <victor.stinner@haypocalc.com>
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140 for (j=0; j < Py_ARRAY_LENGTH(load_errtab); j++) {
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141 if (nerr == load_errtab[j].errNo && load_errtab[j].errstr)
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142 ERRBUF_APPEND(load_errtab[j].errstr);
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143 }
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144 while (isdigit(Py_CHARMASK(*message[i]))) message[i]++ ;
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145 ERRBUF_APPEND(message[i]);
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146 ERRBUF_APPEND("\n");
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147 }
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148 errbuf[strlen(errbuf)-1] = '\0'; /* trim off last newline */
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56aa4cda11a8 Issue #14599: Support ImportError.path on AIX and HPUX when loading
Brett Cannon <brett@python.org>
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149 pathname_ob = PyUnicode_FromString(pathname);
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150 errbuf_ob = PyUnicode_FromString(errbuf);
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151 PyErr_SetImportError(errbuf_ob, NULL, pathname);
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152 Py_DECREF(pathname_ob);
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153 Py_DECREF(errbuf_ob);
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154 return;
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155 }
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156
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157
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0874698b1201 Issue #3080: Remove unused argument of _PyImport_GetDynLoadFunc()
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158 dl_funcptr _PyImport_GetDynLoadFunc(const char *shortname,
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159 const char *pathname, FILE *fp)
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160 {
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161 dl_funcptr p;
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162
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163 /*
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164 -- Invoke load() with L_NOAUTODEFER leaving the imported symbols
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165 -- of the shared module unresolved. Thus we have to resolve them
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166 -- explicitly with loadbind. The new module is loaded, then we
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167 -- resolve its symbols using the list of already loaded modules
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168 -- (only those that belong to the python executable). Get these
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169 -- with loadquery(L_GETINFO).
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170 */
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171
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172 static void *staticmodlistptr = NULL;
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173
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174 if (!staticmodlistptr)
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175 if (aix_getoldmodules(&staticmodlistptr) == -1)
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176 return NULL;
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177 p = (dl_funcptr) aix_load((char *)pathname, L_NOAUTODEFER, 0);
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178 if (p == NULL) {
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179 aix_loaderror(pathname);
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180 return NULL;
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181 }
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182
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183 return p;
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184 }