Mercurial > cpython-lru_cache-weakref

comparison Python/dynload_win.c @ 61465:e38335d4df91 2.6

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Recorded merge of revisions 81029 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r81029 | antoine.pitrou | 2010-05-09 16:46:46 +0200 (dim., 09 mai 2010) | 3 lines Untabify C files. Will watch buildbots. ........
author Antoine Pitrou <solipsis@pitrou.net>
date Sun, 09 May 2010 15:15:40 +0000
parents 1434d1bc667f
children
comparison
equal deleted inserted replaced
61461:b6e03ca8a206 61465:e38335d4df91
15 extern ULONG_PTR _Py_ActivateActCtx(); 15 extern ULONG_PTR _Py_ActivateActCtx();
16 void _Py_DeactivateActCtx(ULONG_PTR cookie); 16 void _Py_DeactivateActCtx(ULONG_PTR cookie);
17 17
18 const struct filedescr _PyImport_DynLoadFiletab[] = { 18 const struct filedescr _PyImport_DynLoadFiletab[] = {
19 #ifdef _DEBUG 19 #ifdef _DEBUG
20 {"_d.pyd", "rb", C_EXTENSION}, 20 {"_d.pyd", "rb", C_EXTENSION},
21 #else 21 #else
22 {".pyd", "rb", C_EXTENSION}, 22 {".pyd", "rb", C_EXTENSION},
23 #endif 23 #endif
24 {0, 0} 24 {0, 0}
25 }; 25 };
26 26
27 27
28 /* Case insensitive string compare, to avoid any dependencies on particular 28 /* Case insensitive string compare, to avoid any dependencies on particular
29 C RTL implementations */ 29 C RTL implementations */
30 30
31 static int strcasecmp (char *string1, char *string2) 31 static int strcasecmp (char *string1, char *string2)
32 { 32 {
33 int first, second; 33 int first, second;
34 34
35 do { 35 do {
36 first = tolower(*string1); 36 first = tolower(*string1);
37 second = tolower(*string2); 37 second = tolower(*string2);
38 string1++; 38 string1++;
39 string2++; 39 string2++;
40 } while (first && first == second); 40 } while (first && first == second);
41 41
42 return (first - second); 42 return (first - second);
43 } 43 }
44 44
45 45
46 /* Function to return the name of the "python" DLL that the supplied module 46 /* Function to return the name of the "python" DLL that the supplied module
47 directly imports. Looks through the list of imported modules and 47 directly imports. Looks through the list of imported modules and
48 returns the first entry that starts with "python" (case sensitive) and 48 returns the first entry that starts with "python" (case sensitive) and
64 #define DWORD_AT(mem) (*(DWORD *)(mem)) 64 #define DWORD_AT(mem) (*(DWORD *)(mem))
65 #define WORD_AT(mem) (*(WORD *)(mem)) 65 #define WORD_AT(mem) (*(WORD *)(mem))
66 66
67 static char *GetPythonImport (HINSTANCE hModule) 67 static char *GetPythonImport (HINSTANCE hModule)
68 { 68 {
69 unsigned char *dllbase, *import_data, *import_name; 69 unsigned char *dllbase, *import_data, *import_name;
70 DWORD pe_offset, opt_offset; 70 DWORD pe_offset, opt_offset;
71 WORD opt_magic; 71 WORD opt_magic;
72 int num_dict_off, import_off; 72 int num_dict_off, import_off;
73 73
74 /* Safety check input */ 74 /* Safety check input */
75 if (hModule == NULL) { 75 if (hModule == NULL) {
76 return NULL; 76 return NULL;
77 } 77 }
78 78
79 /* Module instance is also the base load address. First portion of 79 /* Module instance is also the base load address. First portion of
80 memory is the MS-DOS loader, which holds the offset to the PE 80 memory is the MS-DOS loader, which holds the offset to the PE
81 header (from the load base) at 0x3C */ 81 header (from the load base) at 0x3C */
82 dllbase = (unsigned char *)hModule; 82 dllbase = (unsigned char *)hModule;
83 pe_offset = DWORD_AT(dllbase + 0x3C); 83 pe_offset = DWORD_AT(dllbase + 0x3C);
84 84
85 /* The PE signature must be "PE\0\0" */ 85 /* The PE signature must be "PE\0\0" */
86 if (memcmp(dllbase+pe_offset,"PE\0\0",4)) { 86 if (memcmp(dllbase+pe_offset,"PE\0\0",4)) {
87 return NULL; 87 return NULL;
88 } 88 }
89 89
90 /* Following the PE signature is the standard COFF header (20 90 /* Following the PE signature is the standard COFF header (20
91 bytes) and then the optional header. The optional header starts 91 bytes) and then the optional header. The optional header starts
92 with a magic value of 0x10B for PE32 or 0x20B for PE32+ (PE32+ 92 with a magic value of 0x10B for PE32 or 0x20B for PE32+ (PE32+
93 uses 64-bits for some fields). It might also be 0x107 for a ROM 93 uses 64-bits for some fields). It might also be 0x107 for a ROM
94 image, but we don't process that here. 94 image, but we don't process that here.
95 95
96 The optional header ends with a data dictionary that directly 96 The optional header ends with a data dictionary that directly
97 points to certain types of data, among them the import entries 97 points to certain types of data, among them the import entries
98 (in the second table entry). Based on the header type, we 98 (in the second table entry). Based on the header type, we
99 determine offsets for the data dictionary count and the entry 99 determine offsets for the data dictionary count and the entry
100 within the dictionary pointing to the imports. */ 100 within the dictionary pointing to the imports. */
101 101
102 opt_offset = pe_offset + 4 + 20; 102 opt_offset = pe_offset + 4 + 20;
103 opt_magic = WORD_AT(dllbase+opt_offset); 103 opt_magic = WORD_AT(dllbase+opt_offset);
104 if (opt_magic == 0x10B) { 104 if (opt_magic == 0x10B) {
105 /* PE32 */ 105 /* PE32 */
106 num_dict_off = 92; 106 num_dict_off = 92;
107 import_off = 104; 107 import_off = 104;
108 } else if (opt_magic == 0x20B) { 108 } else if (opt_magic == 0x20B) {
109 /* PE32+ */ 109 /* PE32+ */
110 num_dict_off = 108; 110 num_dict_off = 108;
111 import_off = 120; 111 import_off = 120;
112 } else { 112 } else {
113 /* Unsupported */ 113 /* Unsupported */
114 return NULL; 114 return NULL;
115 } 115 }
116 116
117 /* Now if an import table exists, offset to it and walk the list of 117 /* Now if an import table exists, offset to it and walk the list of
118 imports. The import table is an array (ending when an entry has 118 imports. The import table is an array (ending when an entry has
119 empty values) of structures (20 bytes each), which contains (at 119 empty values) of structures (20 bytes each), which contains (at
120 offset 12) a relative address (to the module base) at which a 120 offset 12) a relative address (to the module base) at which a
121 string constant holding the import name is located. */ 121 string constant holding the import name is located. */
122 122
123 if (DWORD_AT(dllbase + opt_offset + num_dict_off) >= 2) { 123 if (DWORD_AT(dllbase + opt_offset + num_dict_off) >= 2) {
124 /* We have at least 2 tables - the import table is the second 124 /* We have at least 2 tables - the import table is the second
125 one. But still it may be that the table size is zero */ 125 one. But still it may be that the table size is zero */
126 if (0 == DWORD_AT(dllbase + opt_offset + import_off + sizeof(DWORD))) 126 if (0 == DWORD_AT(dllbase + opt_offset + import_off + sizeof(DWORD)))
127 return NULL; 127 return NULL;
128 import_data = dllbase + DWORD_AT(dllbase + 128 import_data = dllbase + DWORD_AT(dllbase +
129 opt_offset + 129 opt_offset +
130 import_off); 130 import_off);
131 while (DWORD_AT(import_data)) { 131 while (DWORD_AT(import_data)) {
132 import_name = dllbase + DWORD_AT(import_data+12); 132 import_name = dllbase + DWORD_AT(import_data+12);
133 if (strlen(import_name) >= 6 && 133 if (strlen(import_name) >= 6 &&
134 !strncmp(import_name,"python",6)) { 134 !strncmp(import_name,"python",6)) {
135 char *pch; 135 char *pch;
136 136
137 /* Ensure python prefix is followed only 137 /* Ensure python prefix is followed only
138 by numbers to the end of the basename */ 138 by numbers to the end of the basename */
139 pch = import_name + 6; 139 pch = import_name + 6;
140 #ifdef _DEBUG 140 #ifdef _DEBUG
141 while (*pch && pch[0] != '_' && pch[1] != 'd' && pch[2] != '.') { 141 while (*pch && pch[0] != '_' && pch[1] != 'd' && pch[2] != '.') {
142 #else 142 #else
143 while (*pch && *pch != '.') { 143 while (*pch && *pch != '.') {
144 #endif 144 #endif
145 if (*pch >= '0' && *pch <= '9') { 145 if (*pch >= '0' && *pch <= '9') {
146 pch++; 146 pch++;
147 } else { 147 } else {
148 pch = NULL; 148 pch = NULL;
149 break; 149 break;
150 } 150 }
151 } 151 }
152 152
153 if (pch) { 153 if (pch) {
154 /* Found it - return the name */ 154 /* Found it - return the name */
155 return import_name; 155 return import_name;
156 } 156 }
157 } 157 }
158 import_data += 20; 158 import_data += 20;
159 } 159 }
160 } 160 }
161 161
162 return NULL; 162 return NULL;
163 } 163 }
164 164
165 165
166 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname, 166 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
167 const char *pathname, FILE *fp) 167 const char *pathname, FILE *fp)
168 { 168 {
169 dl_funcptr p; 169 dl_funcptr p;
170 char funcname[258], *import_python; 170 char funcname[258], *import_python;
171 171
172 PyOS_snprintf(funcname, sizeof(funcname), "init%.200s", shortname); 172 PyOS_snprintf(funcname, sizeof(funcname), "init%.200s", shortname);
173 173
174 { 174 {
175 HINSTANCE hDLL = NULL; 175 HINSTANCE hDLL = NULL;
176 char pathbuf[260]; 176 char pathbuf[260];
177 LPTSTR dummy; 177 LPTSTR dummy;
178 unsigned int old_mode; 178 unsigned int old_mode;
179 ULONG_PTR cookie = 0; 179 ULONG_PTR cookie = 0;
180 /* We use LoadLibraryEx so Windows looks for dependent DLLs 180 /* We use LoadLibraryEx so Windows looks for dependent DLLs
181 in directory of pathname first. However, Windows95 181 in directory of pathname first. However, Windows95
182 can sometimes not work correctly unless the absolute 182 can sometimes not work correctly unless the absolute
183 path is used. If GetFullPathName() fails, the LoadLibrary 183 path is used. If GetFullPathName() fails, the LoadLibrary
184 will certainly fail too, so use its error code */ 184 will certainly fail too, so use its error code */
185 185
186 /* Don't display a message box when Python can't load a DLL */ 186 /* Don't display a message box when Python can't load a DLL */
187 old_mode = SetErrorMode(SEM_FAILCRITICALERRORS); 187 old_mode = SetErrorMode(SEM_FAILCRITICALERRORS);
188 188
189 if (GetFullPathName(pathname, 189 if (GetFullPathName(pathname,
190 sizeof(pathbuf), 190 sizeof(pathbuf),
191 pathbuf, 191 pathbuf,
192 &dummy)) { 192 &dummy)) {
193 ULONG_PTR cookie = _Py_ActivateActCtx(); 193 ULONG_PTR cookie = _Py_ActivateActCtx();
194 /* XXX This call doesn't exist in Windows CE */ 194 /* XXX This call doesn't exist in Windows CE */
195 hDLL = LoadLibraryEx(pathname, NULL, 195 hDLL = LoadLibraryEx(pathname, NULL,
196 LOAD_WITH_ALTERED_SEARCH_PATH); 196 LOAD_WITH_ALTERED_SEARCH_PATH);
197 _Py_DeactivateActCtx(cookie); 197 _Py_DeactivateActCtx(cookie);
198 } 198 }
199 199
200 /* restore old error mode settings */ 200 /* restore old error mode settings */
201 SetErrorMode(old_mode); 201 SetErrorMode(old_mode);
202 202
203 if (hDLL==NULL){ 203 if (hDLL==NULL){
204 char errBuf[256]; 204 char errBuf[256];
205 unsigned int errorCode; 205 unsigned int errorCode;
206 206
207 /* Get an error string from Win32 error code */ 207 /* Get an error string from Win32 error code */
208 char theInfo[256]; /* Pointer to error text 208 char theInfo[256]; /* Pointer to error text
209 from system */ 209 from system */
210 int theLength; /* Length of error text */ 210 int theLength; /* Length of error text */
211 211
212 errorCode = GetLastError(); 212 errorCode = GetLastError();
213 213
214 theLength = FormatMessage( 214 theLength = FormatMessage(
215 FORMAT_MESSAGE_FROM_SYSTEM | 215 FORMAT_MESSAGE_FROM_SYSTEM |
216 FORMAT_MESSAGE_IGNORE_INSERTS, /* flags */ 216 FORMAT_MESSAGE_IGNORE_INSERTS, /* flags */
217 NULL, /* message source */ 217 NULL, /* message source */
218 errorCode, /* the message (error) ID */ 218 errorCode, /* the message (error) ID */
219 0, /* default language environment */ 219 0, /* default language environment */
220 (LPTSTR) theInfo, /* the buffer */ 220 (LPTSTR) theInfo, /* the buffer */
221 sizeof(theInfo), /* the buffer size */ 221 sizeof(theInfo), /* the buffer size */
222 NULL); /* no additional format args. */ 222 NULL); /* no additional format args. */
223 223
224 /* Problem: could not get the error message. 224 /* Problem: could not get the error message.
225 This should not happen if called correctly. */ 225 This should not happen if called correctly. */
226 if (theLength == 0) { 226 if (theLength == 0) {
227 PyOS_snprintf(errBuf, sizeof(errBuf), 227 PyOS_snprintf(errBuf, sizeof(errBuf),
228 "DLL load failed with error code %d", 228 "DLL load failed with error code %d",
229 errorCode); 229 errorCode);
230 } else { 230 } else {
231 size_t len; 231 size_t len;
232 /* For some reason a \r\n 232 /* For some reason a \r\n
233 is appended to the text */ 233 is appended to the text */
234 if (theLength >= 2 && 234 if (theLength >= 2 &&
235 theInfo[theLength-2] == '\r' && 235 theInfo[theLength-2] == '\r' &&
236 theInfo[theLength-1] == '\n') { 236 theInfo[theLength-1] == '\n') {
237 theLength -= 2; 237 theLength -= 2;
238 theInfo[theLength] = '\0'; 238 theInfo[theLength] = '\0';
239 } 239 }
240 strcpy(errBuf, "DLL load failed: "); 240 strcpy(errBuf, "DLL load failed: ");
241 len = strlen(errBuf); 241 len = strlen(errBuf);
242 strncpy(errBuf+len, theInfo, 242 strncpy(errBuf+len, theInfo,
243 sizeof(errBuf)-len); 243 sizeof(errBuf)-len);
244 errBuf[sizeof(errBuf)-1] = '\0'; 244 errBuf[sizeof(errBuf)-1] = '\0';
245 } 245 }
246 PyErr_SetString(PyExc_ImportError, errBuf); 246 PyErr_SetString(PyExc_ImportError, errBuf);
247 return NULL; 247 return NULL;
248 } else { 248 } else {
249 char buffer[256]; 249 char buffer[256];
250 250
251 #ifdef _DEBUG 251 #ifdef _DEBUG
252 PyOS_snprintf(buffer, sizeof(buffer), "python%d%d_d.dll", 252 PyOS_snprintf(buffer, sizeof(buffer), "python%d%d_d.dll",
253 #else 253 #else
254 PyOS_snprintf(buffer, sizeof(buffer), "python%d%d.dll", 254 PyOS_snprintf(buffer, sizeof(buffer), "python%d%d.dll",
255 #endif 255 #endif
256 PY_MAJOR_VERSION,PY_MINOR_VERSION); 256 PY_MAJOR_VERSION,PY_MINOR_VERSION);
257 import_python = GetPythonImport(hDLL); 257 import_python = GetPythonImport(hDLL);
258 258
259 if (import_python && 259 if (import_python &&
260 strcasecmp(buffer,import_python)) { 260 strcasecmp(buffer,import_python)) {
261 PyOS_snprintf(buffer, sizeof(buffer), 261 PyOS_snprintf(buffer, sizeof(buffer),
262 "Module use of %.150s conflicts " 262 "Module use of %.150s conflicts "
263 "with this version of Python.", 263 "with this version of Python.",
264 import_python); 264 import_python);
265 PyErr_SetString(PyExc_ImportError,buffer); 265 PyErr_SetString(PyExc_ImportError,buffer);
266 FreeLibrary(hDLL); 266 FreeLibrary(hDLL);
267 return NULL; 267 return NULL;
268 } 268 }
269 } 269 }
270 p = GetProcAddress(hDLL, funcname); 270 p = GetProcAddress(hDLL, funcname);
271 } 271 }
272 272
273 return p; 273 return p;
274 } 274 }