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annotate Python/dynload_shlib.c @ 58664:993f703a61ba

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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
author Benjamin Peterson <benjamin@python.org>
date Wed, 03 Feb 2010 02:35:45 +0000
parents 94f64f11fdd0
children cab14be0ada1
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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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4 #include "Python.h"
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5 #include "importdl.h"
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6
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7 #include <sys/types.h>
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8 #include <sys/stat.h>
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9
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10 #if defined(__NetBSD__)
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11 #include <sys/param.h>
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12 #if (NetBSD < 199712)
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13 #include <nlist.h>
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14 #include <link.h>
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15 #define dlerror() "error in dynamic linking"
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16 #endif
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17 #endif /* NetBSD */
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19 #ifdef HAVE_DLFCN_H
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20 #include <dlfcn.h>
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21 #else
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22 #if defined(PYOS_OS2) && defined(PYCC_GCC)
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23 #include "dlfcn.h"
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24 #endif
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25 #endif
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26
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27 #if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__)
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28 #define LEAD_UNDERSCORE "_"
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29 #else
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30 #define LEAD_UNDERSCORE ""
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31 #endif
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34 const struct filedescr _PyImport_DynLoadFiletab[] = {
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35 #ifdef __CYGWIN__
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36 {".dll", "rb", C_EXTENSION},
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37 {"module.dll", "rb", C_EXTENSION},
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38 #else
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39 #if defined(PYOS_OS2) && defined(PYCC_GCC)
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40 {".pyd", "rb", C_EXTENSION},
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41 {".dll", "rb", C_EXTENSION},
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42 #else
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43 #ifdef __VMS
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44 {".exe", "rb", C_EXTENSION},
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45 {".EXE", "rb", C_EXTENSION},
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46 {"module.exe", "rb", C_EXTENSION},
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47 {"MODULE.EXE", "rb", C_EXTENSION},
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48 #else
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49 {".so", "rb", C_EXTENSION},
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50 {"module.so", "rb", C_EXTENSION},
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51 #endif
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52 #endif
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53 #endif
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54 {0, 0}
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55 };
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56
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57 static struct {
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58 dev_t dev;
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59 #ifdef __VMS
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60 ino_t ino[3];
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61 #else
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62 ino_t ino;
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63 #endif
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64 void *handle;
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65 } handles[128];
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66 static int nhandles = 0;
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67
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68
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69 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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70 const char *pathname, FILE *fp)
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71 {
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72 dl_funcptr p;
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73 void *handle;
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74 char funcname[258];
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75 char pathbuf[260];
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76 int dlopenflags=0;
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77
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78 if (strchr(pathname, '/') == NULL) {
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79 /* Prefix bare filename with "./" */
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80 PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname);
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81 pathname = pathbuf;
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82 }
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83
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84 PyOS_snprintf(funcname, sizeof(funcname),
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85 LEAD_UNDERSCORE "PyInit_%.200s", shortname);
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86
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87 if (fp != NULL) {
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88 int i;
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89 struct stat statb;
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90 fstat(fileno(fp), &statb);
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91 for (i = 0; i < nhandles; i++) {
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92 if (statb.st_dev == handles[i].dev &&
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93 statb.st_ino == handles[i].ino) {
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94 p = (dl_funcptr) dlsym(handles[i].handle,
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95 funcname);
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96 return p;
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97 }
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98 }
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99 if (nhandles < 128) {
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100 handles[nhandles].dev = statb.st_dev;
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101 #ifdef __VMS
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102 handles[nhandles].ino[0] = statb.st_ino[0];
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103 handles[nhandles].ino[1] = statb.st_ino[1];
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104 handles[nhandles].ino[2] = statb.st_ino[2];
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105 #else
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106 handles[nhandles].ino = statb.st_ino;
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107 #endif
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108 }
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109 }
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110
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111 #if !(defined(PYOS_OS2) && defined(PYCC_GCC))
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112 dlopenflags = PyThreadState_GET()->interp->dlopenflags;
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113 #endif
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114
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115 if (Py_VerboseFlag)
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116 PySys_WriteStderr("dlopen(\"%s\", %x);\n", pathname,
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117 dlopenflags);
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118
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119 #ifdef __VMS
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120 /* VMS currently don't allow a pathname, use a logical name instead */
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121 /* Concatenate 'python_module_' and shortname */
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122 /* so "import vms.bar" will use the logical python_module_bar */
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123 /* As C module use only one name space this is probably not a */
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124 /* important limitation */
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125 PyOS_snprintf(pathbuf, sizeof(pathbuf), "python_module_%-.200s",
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126 shortname);
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127 pathname = pathbuf;
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128 #endif
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129
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130 handle = dlopen(pathname, dlopenflags);
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131
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132 if (handle == NULL) {
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133 const char *error = dlerror();
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134 if (error == NULL)
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135 error = "unknown dlopen() error";
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136 PyErr_SetString(PyExc_ImportError, error);
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137 return NULL;
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138 }
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139 if (fp != NULL && nhandles < 128)
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140 handles[nhandles++].handle = handle;
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141 p = (dl_funcptr) dlsym(handle, funcname);
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142 return p;
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143 }