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d8906c6f TJB |
1 | /* gdb commands implemented in Python |
2 | ||
618f726f | 3 | Copyright (C) 2008-2016 Free Software Foundation, Inc. |
d8906c6f TJB |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | ||
21 | #include "defs.h" | |
d452c4bc | 22 | #include "arch-utils.h" |
d8906c6f | 23 | #include "value.h" |
d8906c6f TJB |
24 | #include "python-internal.h" |
25 | #include "charset.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "cli/cli-decode.h" | |
28 | #include "completer.h" | |
d452c4bc | 29 | #include "language.h" |
d8906c6f TJB |
30 | |
31 | /* Struct representing built-in completion types. */ | |
32 | struct cmdpy_completer | |
33 | { | |
75ddda77 DE |
34 | /* Python symbol name. |
35 | This isn't a const char * for Python 2.4's sake. | |
36 | PyModule_AddIntConstant only takes a char *, sigh. */ | |
d8906c6f TJB |
37 | char *name; |
38 | /* Completion function. */ | |
625e8578 | 39 | completer_ftype *completer; |
d8906c6f TJB |
40 | }; |
41 | ||
75ddda77 | 42 | static const struct cmdpy_completer completers[] = |
d8906c6f TJB |
43 | { |
44 | { "COMPLETE_NONE", noop_completer }, | |
45 | { "COMPLETE_FILENAME", filename_completer }, | |
46 | { "COMPLETE_LOCATION", location_completer }, | |
47 | { "COMPLETE_COMMAND", command_completer }, | |
48 | { "COMPLETE_SYMBOL", make_symbol_completion_list_fn }, | |
92e32e33 | 49 | { "COMPLETE_EXPRESSION", expression_completer }, |
d8906c6f TJB |
50 | }; |
51 | ||
52 | #define N_COMPLETERS (sizeof (completers) / sizeof (completers[0])) | |
53 | ||
54 | /* A gdb command. For the time being only ordinary commands (not | |
55 | set/show commands) are allowed. */ | |
56 | struct cmdpy_object | |
57 | { | |
58 | PyObject_HEAD | |
59 | ||
60 | /* The corresponding gdb command object, or NULL if the command is | |
61 | no longer installed. */ | |
62 | struct cmd_list_element *command; | |
63 | ||
64 | /* A prefix command requires storage for a list of its sub-commands. | |
65 | A pointer to this is passed to add_prefix_command, and to add_cmd | |
66 | for sub-commands of that prefix. If this Command is not a prefix | |
67 | command, then this field is unused. */ | |
68 | struct cmd_list_element *sub_list; | |
69 | }; | |
70 | ||
71 | typedef struct cmdpy_object cmdpy_object; | |
72 | ||
e36122e9 | 73 | extern PyTypeObject cmdpy_object_type |
62eec1a5 | 74 | CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("cmdpy_object"); |
d8906c6f | 75 | |
d8906c6f TJB |
76 | /* Constants used by this module. */ |
77 | static PyObject *invoke_cst; | |
78 | static PyObject *complete_cst; | |
79 | ||
80 | \f | |
81 | ||
82 | /* Python function which wraps dont_repeat. */ | |
83 | static PyObject * | |
84 | cmdpy_dont_repeat (PyObject *self, PyObject *args) | |
85 | { | |
86 | dont_repeat (); | |
87 | Py_RETURN_NONE; | |
88 | } | |
89 | ||
90 | \f | |
91 | ||
92 | /* Called if the gdb cmd_list_element is destroyed. */ | |
07ca107c | 93 | |
d8906c6f TJB |
94 | static void |
95 | cmdpy_destroyer (struct cmd_list_element *self, void *context) | |
96 | { | |
97 | cmdpy_object *cmd; | |
d452c4bc | 98 | struct cleanup *cleanup; |
d8906c6f | 99 | |
d452c4bc | 100 | cleanup = ensure_python_env (get_current_arch (), current_language); |
d8906c6f TJB |
101 | |
102 | /* Release our hold on the command object. */ | |
103 | cmd = (cmdpy_object *) context; | |
104 | cmd->command = NULL; | |
105 | Py_DECREF (cmd); | |
106 | ||
107 | /* We allocated the name, doc string, and perhaps the prefix | |
108 | name. */ | |
6f937416 | 109 | xfree ((char *) self->name); |
1947513d | 110 | xfree ((char *) self->doc); |
64e61d29 | 111 | xfree ((char *) self->prefixname); |
d8906c6f | 112 | |
d452c4bc | 113 | do_cleanups (cleanup); |
d8906c6f TJB |
114 | } |
115 | ||
116 | /* Called by gdb to invoke the command. */ | |
07ca107c | 117 | |
d8906c6f TJB |
118 | static void |
119 | cmdpy_function (struct cmd_list_element *command, char *args, int from_tty) | |
120 | { | |
121 | cmdpy_object *obj = (cmdpy_object *) get_cmd_context (command); | |
122 | PyObject *argobj, *ttyobj, *result; | |
123 | struct cleanup *cleanup; | |
d8906c6f | 124 | |
d452c4bc | 125 | cleanup = ensure_python_env (get_current_arch (), current_language); |
d8906c6f TJB |
126 | |
127 | if (! obj) | |
128 | error (_("Invalid invocation of Python command object.")); | |
129 | if (! PyObject_HasAttr ((PyObject *) obj, invoke_cst)) | |
130 | { | |
131 | if (obj->command->prefixname) | |
132 | { | |
133 | /* A prefix command does not need an invoke method. */ | |
134 | do_cleanups (cleanup); | |
135 | return; | |
136 | } | |
137 | error (_("Python command object missing 'invoke' method.")); | |
138 | } | |
139 | ||
140 | if (! args) | |
141 | args = ""; | |
142 | argobj = PyUnicode_Decode (args, strlen (args), host_charset (), NULL); | |
143 | if (! argobj) | |
8dc78533 JK |
144 | { |
145 | gdbpy_print_stack (); | |
146 | error (_("Could not convert arguments to Python string.")); | |
147 | } | |
d8906c6f TJB |
148 | |
149 | ttyobj = from_tty ? Py_True : Py_False; | |
150 | Py_INCREF (ttyobj); | |
151 | result = PyObject_CallMethodObjArgs ((PyObject *) obj, invoke_cst, argobj, | |
152 | ttyobj, NULL); | |
153 | Py_DECREF (argobj); | |
154 | Py_DECREF (ttyobj); | |
07ca107c | 155 | |
d8906c6f TJB |
156 | if (! result) |
157 | { | |
158 | PyObject *ptype, *pvalue, *ptraceback; | |
d8906c6f TJB |
159 | |
160 | PyErr_Fetch (&ptype, &pvalue, &ptraceback); | |
161 | ||
07ca107c DE |
162 | /* Try to fetch an error message contained within ptype, pvalue. |
163 | When fetching the error message we need to make our own copy, | |
164 | we no longer own ptype, pvalue after the call to PyErr_Restore. */ | |
d8906c6f | 165 | |
9b972014 TT |
166 | gdb::unique_xmalloc_ptr<char> |
167 | msg (gdbpy_exception_to_string (ptype, pvalue)); | |
07ca107c DE |
168 | |
169 | if (msg == NULL) | |
170 | { | |
171 | /* An error occurred computing the string representation of the | |
172 | error message. This is rare, but we should inform the user. */ | |
173 | printf_filtered (_("An error occurred in a Python command\n" | |
9a2b4c1b MS |
174 | "and then another occurred computing the " |
175 | "error message.\n")); | |
d8906c6f | 176 | gdbpy_print_stack (); |
d8906c6f | 177 | } |
07ca107c DE |
178 | |
179 | /* Don't print the stack for gdb.GdbError exceptions. | |
180 | It is generally used to flag user errors. | |
181 | ||
182 | We also don't want to print "Error occurred in Python command" | |
183 | for user errors. However, a missing message for gdb.GdbError | |
184 | exceptions is arguably a bug, so we flag it as such. */ | |
185 | ||
186 | if (! PyErr_GivenExceptionMatches (ptype, gdbpy_gdberror_exc) | |
187 | || msg == NULL || *msg == '\0') | |
d8906c6f TJB |
188 | { |
189 | PyErr_Restore (ptype, pvalue, ptraceback); | |
190 | gdbpy_print_stack (); | |
07ca107c | 191 | if (msg != NULL && *msg != '\0') |
9b972014 | 192 | error (_("Error occurred in Python command: %s"), msg.get ()); |
07ca107c DE |
193 | else |
194 | error (_("Error occurred in Python command.")); | |
d8906c6f | 195 | } |
07ca107c | 196 | else |
cca56ac7 TT |
197 | { |
198 | Py_XDECREF (ptype); | |
199 | Py_XDECREF (pvalue); | |
200 | Py_XDECREF (ptraceback); | |
9b972014 | 201 | error ("%s", msg.get ()); |
cca56ac7 | 202 | } |
d8906c6f | 203 | } |
07ca107c | 204 | |
d8906c6f TJB |
205 | Py_DECREF (result); |
206 | do_cleanups (cleanup); | |
207 | } | |
208 | ||
7d793aa9 SDJ |
209 | /* Helper function for the Python command completers (both "pure" |
210 | completer and brkchar handler). This function takes COMMAND, TEXT | |
211 | and WORD and tries to call the Python method for completion with | |
6d62641c SDJ |
212 | these arguments. |
213 | ||
214 | This function is usually called twice: once when we are figuring out | |
215 | the break characters to be used, and another to perform the real | |
216 | completion itself. The reason for this two step dance is that we | |
217 | need to know the set of "brkchars" to use early on, before we | |
218 | actually try to perform the completion. But if a Python command | |
219 | supplies a "complete" method then we have to call that method | |
220 | first: it may return as its result the kind of completion to | |
221 | perform and that will in turn specify which brkchars to use. IOW, | |
222 | we need the result of the "complete" method before we actually | |
223 | perform the completion. The only situation when this function is | |
224 | not called twice is when the user uses the "complete" command: in | |
225 | this scenario, there is no call to determine the "brkchars". | |
226 | ||
227 | Ideally, it would be nice to cache the result of the first call (to | |
228 | determine the "brkchars") and return this value directly in the | |
229 | second call (to perform the actual completion). However, due to | |
230 | the peculiarity of the "complete" command mentioned above, it is | |
231 | possible to put GDB in a bad state if you perform a TAB-completion | |
232 | and then a "complete"-completion sequentially. Therefore, we just | |
233 | recalculate everything twice for TAB-completions. | |
7d793aa9 SDJ |
234 | |
235 | This function returns the PyObject representing the Python method | |
236 | call. */ | |
237 | ||
238 | static PyObject * | |
239 | cmdpy_completer_helper (struct cmd_list_element *command, | |
6d62641c | 240 | const char *text, const char *word) |
7d793aa9 SDJ |
241 | { |
242 | cmdpy_object *obj = (cmdpy_object *) get_cmd_context (command); | |
243 | PyObject *textobj, *wordobj; | |
6d62641c | 244 | PyObject *resultobj; |
7d793aa9 | 245 | |
6d62641c SDJ |
246 | if (obj == NULL) |
247 | error (_("Invalid invocation of Python command object.")); | |
248 | if (!PyObject_HasAttr ((PyObject *) obj, complete_cst)) | |
7d793aa9 | 249 | { |
6d62641c SDJ |
250 | /* If there is no complete method, don't error. */ |
251 | return NULL; | |
252 | } | |
7d793aa9 | 253 | |
6d62641c SDJ |
254 | textobj = PyUnicode_Decode (text, strlen (text), host_charset (), NULL); |
255 | if (textobj == NULL) | |
256 | error (_("Could not convert argument to Python string.")); | |
257 | wordobj = PyUnicode_Decode (word, strlen (word), host_charset (), NULL); | |
258 | if (wordobj == NULL) | |
259 | { | |
7d793aa9 | 260 | Py_DECREF (textobj); |
6d62641c SDJ |
261 | error (_("Could not convert argument to Python string.")); |
262 | } | |
7d793aa9 | 263 | |
6d62641c SDJ |
264 | resultobj = PyObject_CallMethodObjArgs ((PyObject *) obj, complete_cst, |
265 | textobj, wordobj, NULL); | |
266 | Py_DECREF (textobj); | |
267 | Py_DECREF (wordobj); | |
268 | if (!resultobj) | |
269 | { | |
270 | /* Just swallow errors here. */ | |
271 | PyErr_Clear (); | |
7d793aa9 SDJ |
272 | } |
273 | ||
6d62641c SDJ |
274 | Py_XINCREF (resultobj); |
275 | ||
7d793aa9 SDJ |
276 | return resultobj; |
277 | } | |
278 | ||
279 | /* Python function called to determine the break characters of a | |
280 | certain completer. We are only interested in knowing if the | |
281 | completer registered by the user will return one of the integer | |
282 | codes (see COMPLETER_* symbols). */ | |
283 | ||
284 | static void | |
285 | cmdpy_completer_handle_brkchars (struct cmd_list_element *command, | |
286 | const char *text, const char *word) | |
287 | { | |
288 | PyObject *resultobj = NULL; | |
289 | struct cleanup *cleanup; | |
290 | ||
291 | cleanup = ensure_python_env (get_current_arch (), current_language); | |
292 | ||
293 | /* Calling our helper to obtain the PyObject of the Python | |
294 | function. */ | |
6d62641c | 295 | resultobj = cmdpy_completer_helper (command, text, word); |
7d793aa9 SDJ |
296 | |
297 | /* Check if there was an error. */ | |
298 | if (resultobj == NULL) | |
299 | goto done; | |
300 | ||
301 | if (PyInt_Check (resultobj)) | |
302 | { | |
303 | /* User code may also return one of the completion constants, | |
304 | thus requesting that sort of completion. We are only | |
305 | interested in this kind of return. */ | |
306 | long value; | |
307 | ||
308 | if (!gdb_py_int_as_long (resultobj, &value)) | |
309 | { | |
310 | /* Ignore. */ | |
311 | PyErr_Clear (); | |
312 | } | |
313 | else if (value >= 0 && value < (long) N_COMPLETERS) | |
314 | { | |
315 | /* This is the core of this function. Depending on which | |
316 | completer type the Python function returns, we have to | |
317 | adjust the break characters accordingly. */ | |
318 | set_gdb_completion_word_break_characters | |
319 | (completers[value].completer); | |
320 | } | |
321 | } | |
322 | ||
323 | done: | |
324 | ||
6d62641c | 325 | Py_XDECREF (resultobj); |
7d793aa9 SDJ |
326 | do_cleanups (cleanup); |
327 | } | |
328 | ||
d8906c6f | 329 | /* Called by gdb for command completion. */ |
63d97a20 | 330 | |
49c4e619 | 331 | static VEC (char_ptr) * |
6f937416 PA |
332 | cmdpy_completer (struct cmd_list_element *command, |
333 | const char *text, const char *word) | |
d8906c6f | 334 | { |
7d793aa9 | 335 | PyObject *resultobj = NULL; |
49c4e619 | 336 | VEC (char_ptr) *result = NULL; |
d8906c6f | 337 | struct cleanup *cleanup; |
d8906c6f | 338 | |
d452c4bc | 339 | cleanup = ensure_python_env (get_current_arch (), current_language); |
d8906c6f | 340 | |
7d793aa9 SDJ |
341 | /* Calling our helper to obtain the PyObject of the Python |
342 | function. */ | |
6d62641c | 343 | resultobj = cmdpy_completer_helper (command, text, word); |
d8906c6f | 344 | |
7d793aa9 SDJ |
345 | /* If the result object of calling the Python function is NULL, it |
346 | means that there was an error. In this case, just give up and | |
347 | return NULL. */ | |
348 | if (resultobj == NULL) | |
349 | goto done; | |
d8906c6f TJB |
350 | |
351 | result = NULL; | |
ba327838 | 352 | if (PyInt_Check (resultobj)) |
d8906c6f | 353 | { |
ba327838 TT |
354 | /* User code may also return one of the completion constants, |
355 | thus requesting that sort of completion. */ | |
356 | long value; | |
357 | ||
358 | if (! gdb_py_int_as_long (resultobj, &value)) | |
359 | { | |
360 | /* Ignore. */ | |
361 | PyErr_Clear (); | |
362 | } | |
363 | else if (value >= 0 && value < (long) N_COMPLETERS) | |
364 | result = completers[value].completer (command, text, word); | |
365 | } | |
366 | else | |
367 | { | |
368 | PyObject *iter = PyObject_GetIter (resultobj); | |
369 | PyObject *elt; | |
d59b6f6c | 370 | |
ba327838 | 371 | if (iter == NULL) |
d8906c6f TJB |
372 | goto done; |
373 | ||
ba327838 | 374 | while ((elt = PyIter_Next (iter)) != NULL) |
d8906c6f | 375 | { |
d59b6f6c | 376 | |
ba327838 | 377 | if (! gdbpy_is_string (elt)) |
d8906c6f TJB |
378 | { |
379 | /* Skip problem elements. */ | |
ba327838 | 380 | Py_DECREF (elt); |
d8906c6f TJB |
381 | continue; |
382 | } | |
9b972014 TT |
383 | gdb::unique_xmalloc_ptr<char> |
384 | item (python_string_to_host_string (elt)); | |
ba327838 | 385 | Py_DECREF (elt); |
49c4e619 | 386 | if (item == NULL) |
8dc78533 JK |
387 | { |
388 | /* Skip problem elements. */ | |
389 | PyErr_Clear (); | |
390 | continue; | |
391 | } | |
9b972014 | 392 | VEC_safe_push (char_ptr, result, item.release ()); |
d8906c6f | 393 | } |
d59b6f6c | 394 | |
ba327838 TT |
395 | Py_DECREF (iter); |
396 | ||
397 | /* If we got some results, ignore problems. Otherwise, report | |
398 | the problem. */ | |
399 | if (result != NULL && PyErr_Occurred ()) | |
400 | PyErr_Clear (); | |
d8906c6f TJB |
401 | } |
402 | ||
403 | done: | |
404 | ||
6d62641c | 405 | Py_XDECREF (resultobj); |
d8906c6f TJB |
406 | do_cleanups (cleanup); |
407 | ||
408 | return result; | |
409 | } | |
410 | ||
411 | /* Helper for cmdpy_init which locates the command list to use and | |
412 | pulls out the command name. | |
256458bc | 413 | |
63d97a20 | 414 | NAME is the command name list. The final word in the list is the |
d8906c6f TJB |
415 | name of the new command. All earlier words must be existing prefix |
416 | commands. | |
417 | ||
418 | *BASE_LIST is set to the final prefix command's list of | |
419 | *sub-commands. | |
256458bc | 420 | |
d7b32ed3 PM |
421 | START_LIST is the list in which the search starts. |
422 | ||
d8906c6f TJB |
423 | This function returns the xmalloc()d name of the new command. On |
424 | error sets the Python error and returns NULL. */ | |
63d97a20 | 425 | |
d7b32ed3 | 426 | char * |
63d97a20 | 427 | gdbpy_parse_command_name (const char *name, |
d7b32ed3 PM |
428 | struct cmd_list_element ***base_list, |
429 | struct cmd_list_element **start_list) | |
d8906c6f TJB |
430 | { |
431 | struct cmd_list_element *elt; | |
63d97a20 | 432 | int len = strlen (name); |
d8906c6f | 433 | int i, lastchar; |
6f937416 PA |
434 | char *prefix_text; |
435 | const char *prefix_text2; | |
d8906c6f TJB |
436 | char *result; |
437 | ||
438 | /* Skip trailing whitespace. */ | |
63d97a20 | 439 | for (i = len - 1; i >= 0 && (name[i] == ' ' || name[i] == '\t'); --i) |
d8906c6f TJB |
440 | ; |
441 | if (i < 0) | |
442 | { | |
044c0f87 | 443 | PyErr_SetString (PyExc_RuntimeError, _("No command name found.")); |
d8906c6f TJB |
444 | return NULL; |
445 | } | |
446 | lastchar = i; | |
447 | ||
448 | /* Find first character of the final word. */ | |
63d97a20 DE |
449 | for (; i > 0 && (isalnum (name[i - 1]) |
450 | || name[i - 1] == '-' | |
451 | || name[i - 1] == '_'); | |
d8906c6f TJB |
452 | --i) |
453 | ; | |
224c3ddb | 454 | result = (char *) xmalloc (lastchar - i + 2); |
63d97a20 | 455 | memcpy (result, &name[i], lastchar - i + 1); |
d8906c6f TJB |
456 | result[lastchar - i + 1] = '\0'; |
457 | ||
458 | /* Skip whitespace again. */ | |
63d97a20 | 459 | for (--i; i >= 0 && (name[i] == ' ' || name[i] == '\t'); --i) |
d8906c6f TJB |
460 | ; |
461 | if (i < 0) | |
462 | { | |
d7b32ed3 | 463 | *base_list = start_list; |
d8906c6f TJB |
464 | return result; |
465 | } | |
466 | ||
224c3ddb | 467 | prefix_text = (char *) xmalloc (i + 2); |
63d97a20 | 468 | memcpy (prefix_text, name, i + 1); |
d8906c6f TJB |
469 | prefix_text[i + 1] = '\0'; |
470 | ||
63d97a20 DE |
471 | prefix_text2 = prefix_text; |
472 | elt = lookup_cmd_1 (&prefix_text2, *start_list, NULL, 1); | |
d81412aa | 473 | if (elt == NULL || elt == CMD_LIST_AMBIGUOUS) |
d8906c6f | 474 | { |
044c0f87 | 475 | PyErr_Format (PyExc_RuntimeError, _("Could not find command prefix %s."), |
d8906c6f TJB |
476 | prefix_text); |
477 | xfree (prefix_text); | |
478 | xfree (result); | |
479 | return NULL; | |
480 | } | |
481 | ||
482 | if (elt->prefixlist) | |
483 | { | |
484 | xfree (prefix_text); | |
485 | *base_list = elt->prefixlist; | |
486 | return result; | |
487 | } | |
488 | ||
044c0f87 | 489 | PyErr_Format (PyExc_RuntimeError, _("'%s' is not a prefix command."), |
d8906c6f TJB |
490 | prefix_text); |
491 | xfree (prefix_text); | |
492 | xfree (result); | |
493 | return NULL; | |
494 | } | |
495 | ||
496 | /* Object initializer; sets up gdb-side structures for command. | |
497 | ||
cc924cad | 498 | Use: __init__(NAME, COMMAND_CLASS [, COMPLETER_CLASS][, PREFIX]]). |
d8906c6f TJB |
499 | |
500 | NAME is the name of the command. It may consist of multiple words, | |
501 | in which case the final word is the name of the new command, and | |
502 | earlier words must be prefix commands. | |
503 | ||
cc924cad | 504 | COMMAND_CLASS is the kind of command. It should be one of the COMMAND_* |
d8906c6f TJB |
505 | constants defined in the gdb module. |
506 | ||
cc924cad | 507 | COMPLETER_CLASS is the kind of completer. If not given, the |
d8906c6f TJB |
508 | "complete" method will be used. Otherwise, it should be one of the |
509 | COMPLETE_* constants defined in the gdb module. | |
510 | ||
511 | If PREFIX is True, then this command is a prefix command. | |
512 | ||
513 | The documentation for the command is taken from the doc string for | |
63d97a20 DE |
514 | the python class. */ |
515 | ||
d8906c6f | 516 | static int |
cc924cad | 517 | cmdpy_init (PyObject *self, PyObject *args, PyObject *kw) |
d8906c6f TJB |
518 | { |
519 | cmdpy_object *obj = (cmdpy_object *) self; | |
ddd49eee | 520 | const char *name; |
d8906c6f TJB |
521 | int cmdtype; |
522 | int completetype = -1; | |
523 | char *docstring = NULL; | |
d8906c6f TJB |
524 | struct cmd_list_element **cmd_list; |
525 | char *cmd_name, *pfx_name; | |
cc924cad TJB |
526 | static char *keywords[] = { "name", "command_class", "completer_class", |
527 | "prefix", NULL }; | |
d8906c6f TJB |
528 | PyObject *is_prefix = NULL; |
529 | int cmp; | |
530 | ||
531 | if (obj->command) | |
532 | { | |
533 | /* Note: this is apparently not documented in Python. We return | |
534 | 0 for success, -1 for failure. */ | |
535 | PyErr_Format (PyExc_RuntimeError, | |
044c0f87 | 536 | _("Command object already initialized.")); |
d8906c6f TJB |
537 | return -1; |
538 | } | |
539 | ||
9a2b4c1b MS |
540 | if (! PyArg_ParseTupleAndKeywords (args, kw, "si|iO", |
541 | keywords, &name, &cmdtype, | |
d8906c6f TJB |
542 | &completetype, &is_prefix)) |
543 | return -1; | |
544 | ||
545 | if (cmdtype != no_class && cmdtype != class_run | |
546 | && cmdtype != class_vars && cmdtype != class_stack | |
547 | && cmdtype != class_files && cmdtype != class_support | |
548 | && cmdtype != class_info && cmdtype != class_breakpoint | |
549 | && cmdtype != class_trace && cmdtype != class_obscure | |
7d74f244 | 550 | && cmdtype != class_maintenance && cmdtype != class_user) |
d8906c6f | 551 | { |
044c0f87 | 552 | PyErr_Format (PyExc_RuntimeError, _("Invalid command class argument.")); |
d8906c6f TJB |
553 | return -1; |
554 | } | |
555 | ||
556 | if (completetype < -1 || completetype >= (int) N_COMPLETERS) | |
557 | { | |
9a2b4c1b MS |
558 | PyErr_Format (PyExc_RuntimeError, |
559 | _("Invalid completion type argument.")); | |
d8906c6f TJB |
560 | return -1; |
561 | } | |
562 | ||
63d97a20 | 563 | cmd_name = gdbpy_parse_command_name (name, &cmd_list, &cmdlist); |
d8906c6f TJB |
564 | if (! cmd_name) |
565 | return -1; | |
566 | ||
567 | pfx_name = NULL; | |
256458bc | 568 | if (is_prefix != NULL) |
d8906c6f TJB |
569 | { |
570 | cmp = PyObject_IsTrue (is_prefix); | |
571 | if (cmp == 1) | |
572 | { | |
573 | int i, out; | |
256458bc | 574 | |
d8906c6f | 575 | /* Make a normalized form of the command name. */ |
224c3ddb | 576 | pfx_name = (char *) xmalloc (strlen (name) + 2); |
256458bc | 577 | |
d8906c6f TJB |
578 | i = 0; |
579 | out = 0; | |
580 | while (name[i]) | |
581 | { | |
582 | /* Skip whitespace. */ | |
583 | while (name[i] == ' ' || name[i] == '\t') | |
584 | ++i; | |
585 | /* Copy non-whitespace characters. */ | |
586 | while (name[i] && name[i] != ' ' && name[i] != '\t') | |
587 | pfx_name[out++] = name[i++]; | |
588 | /* Add a single space after each word -- including the final | |
589 | word. */ | |
590 | pfx_name[out++] = ' '; | |
591 | } | |
592 | pfx_name[out] = '\0'; | |
593 | } | |
594 | else if (cmp < 0) | |
e463f587 MS |
595 | { |
596 | xfree (cmd_name); | |
d8906c6f | 597 | return -1; |
e463f587 | 598 | } |
d8906c6f TJB |
599 | } |
600 | if (PyObject_HasAttr (self, gdbpy_doc_cst)) | |
601 | { | |
602 | PyObject *ds_obj = PyObject_GetAttr (self, gdbpy_doc_cst); | |
d59b6f6c | 603 | |
d8906c6f | 604 | if (ds_obj && gdbpy_is_string (ds_obj)) |
8dc78533 | 605 | { |
9b972014 | 606 | docstring = python_string_to_host_string (ds_obj).release (); |
8dc78533 JK |
607 | if (docstring == NULL) |
608 | { | |
609 | xfree (cmd_name); | |
610 | xfree (pfx_name); | |
d8191432 | 611 | Py_DECREF (ds_obj); |
8dc78533 JK |
612 | return -1; |
613 | } | |
614 | } | |
d8191432 TT |
615 | |
616 | Py_XDECREF (ds_obj); | |
d8906c6f TJB |
617 | } |
618 | if (! docstring) | |
619 | docstring = xstrdup (_("This command is not documented.")); | |
620 | ||
621 | Py_INCREF (self); | |
622 | ||
492d29ea | 623 | TRY |
d8906c6f TJB |
624 | { |
625 | struct cmd_list_element *cmd; | |
626 | ||
627 | if (pfx_name) | |
628 | { | |
629 | int allow_unknown; | |
630 | ||
631 | /* If we have our own "invoke" method, then allow unknown | |
632 | sub-commands. */ | |
633 | allow_unknown = PyObject_HasAttr (self, invoke_cst); | |
634 | cmd = add_prefix_cmd (cmd_name, (enum command_class) cmdtype, | |
635 | NULL, docstring, &obj->sub_list, | |
636 | pfx_name, allow_unknown, cmd_list); | |
637 | } | |
638 | else | |
639 | cmd = add_cmd (cmd_name, (enum command_class) cmdtype, NULL, | |
640 | docstring, cmd_list); | |
641 | ||
642 | /* There appears to be no API to set this. */ | |
643 | cmd->func = cmdpy_function; | |
644 | cmd->destroyer = cmdpy_destroyer; | |
645 | ||
646 | obj->command = cmd; | |
647 | set_cmd_context (cmd, self); | |
648 | set_cmd_completer (cmd, ((completetype == -1) ? cmdpy_completer | |
649 | : completers[completetype].completer)); | |
7d793aa9 SDJ |
650 | if (completetype == -1) |
651 | set_cmd_completer_handle_brkchars (cmd, | |
652 | cmdpy_completer_handle_brkchars); | |
d8906c6f | 653 | } |
492d29ea | 654 | CATCH (except, RETURN_MASK_ALL) |
d8906c6f TJB |
655 | { |
656 | xfree (cmd_name); | |
657 | xfree (docstring); | |
658 | xfree (pfx_name); | |
659 | Py_DECREF (self); | |
660 | PyErr_Format (except.reason == RETURN_QUIT | |
661 | ? PyExc_KeyboardInterrupt : PyExc_RuntimeError, | |
662 | "%s", except.message); | |
663 | return -1; | |
664 | } | |
492d29ea PA |
665 | END_CATCH |
666 | ||
d8906c6f TJB |
667 | return 0; |
668 | } | |
669 | ||
670 | \f | |
671 | ||
672 | /* Initialize the 'commands' code. */ | |
63d97a20 | 673 | |
999633ed | 674 | int |
d8906c6f TJB |
675 | gdbpy_initialize_commands (void) |
676 | { | |
677 | int i; | |
678 | ||
6a1b1664 | 679 | cmdpy_object_type.tp_new = PyType_GenericNew; |
d8906c6f | 680 | if (PyType_Ready (&cmdpy_object_type) < 0) |
999633ed | 681 | return -1; |
d8906c6f TJB |
682 | |
683 | /* Note: alias and user are special; pseudo appears to be unused, | |
4f45d445 | 684 | and there is no reason to expose tui, I think. */ |
d8906c6f TJB |
685 | if (PyModule_AddIntConstant (gdb_module, "COMMAND_NONE", no_class) < 0 |
686 | || PyModule_AddIntConstant (gdb_module, "COMMAND_RUNNING", class_run) < 0 | |
687 | || PyModule_AddIntConstant (gdb_module, "COMMAND_DATA", class_vars) < 0 | |
688 | || PyModule_AddIntConstant (gdb_module, "COMMAND_STACK", class_stack) < 0 | |
689 | || PyModule_AddIntConstant (gdb_module, "COMMAND_FILES", class_files) < 0 | |
690 | || PyModule_AddIntConstant (gdb_module, "COMMAND_SUPPORT", | |
691 | class_support) < 0 | |
692 | || PyModule_AddIntConstant (gdb_module, "COMMAND_STATUS", class_info) < 0 | |
693 | || PyModule_AddIntConstant (gdb_module, "COMMAND_BREAKPOINTS", | |
694 | class_breakpoint) < 0 | |
695 | || PyModule_AddIntConstant (gdb_module, "COMMAND_TRACEPOINTS", | |
696 | class_trace) < 0 | |
697 | || PyModule_AddIntConstant (gdb_module, "COMMAND_OBSCURE", | |
698 | class_obscure) < 0 | |
699 | || PyModule_AddIntConstant (gdb_module, "COMMAND_MAINTENANCE", | |
7d74f244 DE |
700 | class_maintenance) < 0 |
701 | || PyModule_AddIntConstant (gdb_module, "COMMAND_USER", class_user) < 0) | |
999633ed | 702 | return -1; |
d8906c6f TJB |
703 | |
704 | for (i = 0; i < N_COMPLETERS; ++i) | |
705 | { | |
706 | if (PyModule_AddIntConstant (gdb_module, completers[i].name, i) < 0) | |
999633ed | 707 | return -1; |
d8906c6f TJB |
708 | } |
709 | ||
aa36459a TT |
710 | if (gdb_pymodule_addobject (gdb_module, "Command", |
711 | (PyObject *) &cmdpy_object_type) < 0) | |
999633ed | 712 | return -1; |
d8906c6f TJB |
713 | |
714 | invoke_cst = PyString_FromString ("invoke"); | |
999633ed TT |
715 | if (invoke_cst == NULL) |
716 | return -1; | |
d8906c6f | 717 | complete_cst = PyString_FromString ("complete"); |
999633ed TT |
718 | if (complete_cst == NULL) |
719 | return -1; | |
720 | ||
721 | return 0; | |
d8906c6f TJB |
722 | } |
723 | ||
724 | \f | |
725 | ||
726 | static PyMethodDef cmdpy_object_methods[] = | |
727 | { | |
728 | { "dont_repeat", cmdpy_dont_repeat, METH_NOARGS, | |
729 | "Prevent command repetition when user enters empty line." }, | |
730 | ||
731 | { 0 } | |
732 | }; | |
733 | ||
e36122e9 | 734 | PyTypeObject cmdpy_object_type = |
d8906c6f | 735 | { |
9a27f2c6 | 736 | PyVarObject_HEAD_INIT (NULL, 0) |
d8906c6f TJB |
737 | "gdb.Command", /*tp_name*/ |
738 | sizeof (cmdpy_object), /*tp_basicsize*/ | |
739 | 0, /*tp_itemsize*/ | |
740 | 0, /*tp_dealloc*/ | |
741 | 0, /*tp_print*/ | |
742 | 0, /*tp_getattr*/ | |
743 | 0, /*tp_setattr*/ | |
744 | 0, /*tp_compare*/ | |
745 | 0, /*tp_repr*/ | |
746 | 0, /*tp_as_number*/ | |
747 | 0, /*tp_as_sequence*/ | |
748 | 0, /*tp_as_mapping*/ | |
749 | 0, /*tp_hash */ | |
750 | 0, /*tp_call*/ | |
751 | 0, /*tp_str*/ | |
752 | 0, /*tp_getattro*/ | |
753 | 0, /*tp_setattro*/ | |
754 | 0, /*tp_as_buffer*/ | |
755 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ | |
756 | "GDB command object", /* tp_doc */ | |
757 | 0, /* tp_traverse */ | |
758 | 0, /* tp_clear */ | |
759 | 0, /* tp_richcompare */ | |
760 | 0, /* tp_weaklistoffset */ | |
761 | 0, /* tp_iter */ | |
762 | 0, /* tp_iternext */ | |
763 | cmdpy_object_methods, /* tp_methods */ | |
764 | 0, /* tp_members */ | |
765 | 0, /* tp_getset */ | |
766 | 0, /* tp_base */ | |
767 | 0, /* tp_dict */ | |
768 | 0, /* tp_descr_get */ | |
769 | 0, /* tp_descr_set */ | |
770 | 0, /* tp_dictoffset */ | |
771 | cmdpy_init, /* tp_init */ | |
772 | 0, /* tp_alloc */ | |
d8906c6f | 773 | }; |
07ca107c DE |
774 | |
775 | \f | |
776 | ||
777 | /* Utility to build a buildargv-like result from ARGS. | |
778 | This intentionally parses arguments the way libiberty/argv.c:buildargv | |
779 | does. It splits up arguments in a reasonable way, and we want a standard | |
780 | way of parsing arguments. Several gdb commands use buildargv to parse their | |
781 | arguments. Plus we want to be able to write compatible python | |
782 | implementations of gdb commands. */ | |
783 | ||
784 | PyObject * | |
785 | gdbpy_string_to_argv (PyObject *self, PyObject *args) | |
786 | { | |
787 | PyObject *py_argv; | |
ddd49eee | 788 | const char *input; |
07ca107c DE |
789 | |
790 | if (!PyArg_ParseTuple (args, "s", &input)) | |
791 | return NULL; | |
792 | ||
793 | py_argv = PyList_New (0); | |
3919fd96 TT |
794 | if (py_argv == NULL) |
795 | return NULL; | |
07ca107c DE |
796 | |
797 | /* buildargv uses NULL to represent an empty argument list, but we can't use | |
798 | that in Python. Instead, if ARGS is "" then return an empty list. | |
799 | This undoes the NULL -> "" conversion that cmdpy_function does. */ | |
800 | ||
801 | if (*input != '\0') | |
802 | { | |
803 | char **c_argv = gdb_buildargv (input); | |
804 | int i; | |
805 | ||
806 | for (i = 0; c_argv[i] != NULL; ++i) | |
807 | { | |
808 | PyObject *argp = PyString_FromString (c_argv[i]); | |
809 | ||
810 | if (argp == NULL | |
811 | || PyList_Append (py_argv, argp) < 0) | |
812 | { | |
5af65ec0 | 813 | Py_XDECREF (argp); |
07ca107c DE |
814 | Py_DECREF (py_argv); |
815 | freeargv (c_argv); | |
816 | return NULL; | |
817 | } | |
5af65ec0 | 818 | Py_DECREF (argp); |
07ca107c DE |
819 | } |
820 | ||
821 | freeargv (c_argv); | |
822 | } | |
823 | ||
824 | return py_argv; | |
825 | } |