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883964a7 SC |
1 | /* Support for debug methods in Python. |
2 | ||
42a4f53d | 3 | Copyright (C) 2013-2019 Free Software Foundation, Inc. |
883964a7 SC |
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 | #include "defs.h" | |
21 | #include "arch-utils.h" | |
22 | #include "extension-priv.h" | |
23 | #include "objfiles.h" | |
24 | #include "value.h" | |
25 | #include "language.h" | |
26 | ||
27 | #include "python.h" | |
28 | #include "python-internal.h" | |
29 | ||
30 | static const char enabled_field_name[] = "enabled"; | |
31 | static const char match_method_name[] = "match"; | |
32 | static const char get_arg_types_method_name[] = "get_arg_types"; | |
2ce1cdbf | 33 | static const char get_result_type_method_name[] = "get_result_type"; |
883964a7 SC |
34 | static const char matchers_attr_str[] = "xmethods"; |
35 | ||
36 | static PyObject *py_match_method_name = NULL; | |
37 | static PyObject *py_get_arg_types_method_name = NULL; | |
883964a7 | 38 | |
ba18742c | 39 | struct python_xmethod_worker : xmethod_worker |
883964a7 | 40 | { |
ba18742c SM |
41 | python_xmethod_worker (PyObject *worker, PyObject *this_type); |
42 | ~python_xmethod_worker (); | |
883964a7 | 43 | |
ba18742c | 44 | DISABLE_COPY_AND_ASSIGN (python_xmethod_worker); |
883964a7 | 45 | |
ba18742c | 46 | /* Implementation of xmethod_worker::invoke for Python. */ |
883964a7 | 47 | |
6b1747cd | 48 | value *invoke (value *obj, gdb::array_view<value *> args) override; |
ba18742c | 49 | |
ba18742c SM |
50 | /* Implementation of xmethod_worker::do_get_arg_types for Python. */ |
51 | ||
6b1747cd | 52 | ext_lang_rc do_get_arg_types (std::vector<type *> *type_args) override; |
ba18742c SM |
53 | |
54 | /* Implementation of xmethod_worker::do_get_result_type for Python. | |
883964a7 | 55 | |
ba18742c SM |
56 | For backward compatibility with 7.9, which did not support getting the |
57 | result type, if the get_result_type operation is not provided by WORKER | |
58 | then EXT_LANG_RC_OK is returned and NULL is returned in *RESULT_TYPE. */ | |
883964a7 | 59 | |
6b1747cd | 60 | ext_lang_rc do_get_result_type (value *obj, gdb::array_view<value *> args, |
ba18742c SM |
61 | type **result_type_ptr) override; |
62 | ||
63 | private: | |
64 | ||
65 | PyObject *m_py_worker; | |
66 | PyObject *m_this_type; | |
67 | }; | |
68 | ||
69 | python_xmethod_worker::~python_xmethod_worker () | |
70 | { | |
883964a7 | 71 | /* We don't do much here, but we still need the GIL. */ |
f18e226f | 72 | gdbpy_enter enter_py (get_current_arch (), current_language); |
883964a7 | 73 | |
ba18742c SM |
74 | Py_DECREF (m_py_worker); |
75 | Py_DECREF (m_this_type); | |
883964a7 SC |
76 | } |
77 | ||
883964a7 SC |
78 | /* Invoke the "match" method of the MATCHER and return a new reference |
79 | to the result. Returns NULL on error. */ | |
80 | ||
81 | static PyObject * | |
82 | invoke_match_method (PyObject *matcher, PyObject *py_obj_type, | |
83 | const char *xmethod_name) | |
84 | { | |
883964a7 SC |
85 | int enabled; |
86 | ||
7780f186 TT |
87 | gdbpy_ref<> enabled_field (PyObject_GetAttrString (matcher, |
88 | enabled_field_name)); | |
883964a7 | 89 | if (enabled_field == NULL) |
bf1ca3b9 | 90 | return NULL; |
883964a7 | 91 | |
bf1ca3b9 | 92 | enabled = PyObject_IsTrue (enabled_field.get ()); |
883964a7 | 93 | if (enabled == -1) |
bf1ca3b9 | 94 | return NULL; |
883964a7 SC |
95 | if (enabled == 0) |
96 | { | |
97 | /* Return 'None' if the matcher is not enabled. */ | |
883964a7 SC |
98 | Py_RETURN_NONE; |
99 | } | |
100 | ||
7780f186 TT |
101 | gdbpy_ref<> match_method (PyObject_GetAttrString (matcher, |
102 | match_method_name)); | |
883964a7 | 103 | if (match_method == NULL) |
bf1ca3b9 | 104 | return NULL; |
883964a7 | 105 | |
7780f186 | 106 | gdbpy_ref<> py_xmethod_name (PyString_FromString (xmethod_name)); |
883964a7 | 107 | if (py_xmethod_name == NULL) |
bf1ca3b9 | 108 | return NULL; |
883964a7 | 109 | |
bf1ca3b9 TT |
110 | return PyObject_CallMethodObjArgs (matcher, py_match_method_name, |
111 | py_obj_type, py_xmethod_name.get (), | |
112 | NULL); | |
883964a7 SC |
113 | } |
114 | ||
115 | /* Implementation of get_matching_xmethod_workers for Python. */ | |
116 | ||
117 | enum ext_lang_rc | |
118 | gdbpy_get_matching_xmethod_workers | |
119 | (const struct extension_language_defn *extlang, | |
120 | struct type *obj_type, const char *method_name, | |
ba18742c | 121 | std::vector<xmethod_worker_up> *dm_vec) |
883964a7 | 122 | { |
883964a7 SC |
123 | gdb_assert (obj_type != NULL && method_name != NULL); |
124 | ||
572a5524 | 125 | gdbpy_enter enter_py (get_current_arch (), current_language); |
883964a7 | 126 | |
7780f186 | 127 | gdbpy_ref<> py_type (type_to_type_object (obj_type)); |
883964a7 SC |
128 | if (py_type == NULL) |
129 | { | |
130 | gdbpy_print_stack (); | |
883964a7 SC |
131 | return EXT_LANG_RC_ERROR; |
132 | } | |
883964a7 SC |
133 | |
134 | /* Create an empty list of debug methods. */ | |
7780f186 | 135 | gdbpy_ref<> py_xmethod_matcher_list (PyList_New (0)); |
883964a7 SC |
136 | if (py_xmethod_matcher_list == NULL) |
137 | { | |
138 | gdbpy_print_stack (); | |
883964a7 SC |
139 | return EXT_LANG_RC_ERROR; |
140 | } | |
141 | ||
142 | /* Gather debug method matchers registered with the object files. | |
143 | This could be done differently by iterating over each objfile's matcher | |
144 | list individually, but there's no data yet to show it's needed. */ | |
2030c079 | 145 | for (objfile *objfile : current_program_space->objfiles ()) |
883964a7 | 146 | { |
0a9db5ad | 147 | gdbpy_ref<> py_objfile = objfile_to_objfile_object (objfile); |
883964a7 SC |
148 | |
149 | if (py_objfile == NULL) | |
150 | { | |
151 | gdbpy_print_stack (); | |
883964a7 SC |
152 | return EXT_LANG_RC_ERROR; |
153 | } | |
154 | ||
0a9db5ad TT |
155 | gdbpy_ref<> objfile_matchers (objfpy_get_xmethods (py_objfile.get (), |
156 | NULL)); | |
7780f186 TT |
157 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
158 | objfile_matchers.get ())); | |
572a5524 | 159 | if (temp == NULL) |
883964a7 SC |
160 | { |
161 | gdbpy_print_stack (); | |
883964a7 SC |
162 | return EXT_LANG_RC_ERROR; |
163 | } | |
572a5524 TT |
164 | |
165 | py_xmethod_matcher_list = std::move (temp); | |
883964a7 SC |
166 | } |
167 | ||
168 | /* Gather debug methods matchers registered with the current program | |
169 | space. */ | |
3c7aa307 | 170 | gdbpy_ref<> py_progspace = pspace_to_pspace_object (current_program_space); |
883964a7 SC |
171 | if (py_progspace != NULL) |
172 | { | |
3c7aa307 TT |
173 | gdbpy_ref<> pspace_matchers (pspy_get_xmethods (py_progspace.get (), |
174 | NULL)); | |
883964a7 | 175 | |
7780f186 TT |
176 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
177 | pspace_matchers.get ())); | |
572a5524 | 178 | if (temp == NULL) |
883964a7 SC |
179 | { |
180 | gdbpy_print_stack (); | |
883964a7 SC |
181 | return EXT_LANG_RC_ERROR; |
182 | } | |
572a5524 TT |
183 | |
184 | py_xmethod_matcher_list = std::move (temp); | |
883964a7 SC |
185 | } |
186 | else | |
187 | { | |
188 | gdbpy_print_stack (); | |
883964a7 SC |
189 | return EXT_LANG_RC_ERROR; |
190 | } | |
191 | ||
192 | /* Gather debug method matchers registered globally. */ | |
193 | if (gdb_python_module != NULL | |
194 | && PyObject_HasAttrString (gdb_python_module, matchers_attr_str)) | |
195 | { | |
7780f186 TT |
196 | gdbpy_ref<> gdb_matchers (PyObject_GetAttrString (gdb_python_module, |
197 | matchers_attr_str)); | |
883964a7 SC |
198 | if (gdb_matchers != NULL) |
199 | { | |
7780f186 TT |
200 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
201 | gdb_matchers.get ())); | |
572a5524 | 202 | if (temp == NULL) |
883964a7 SC |
203 | { |
204 | gdbpy_print_stack (); | |
883964a7 SC |
205 | return EXT_LANG_RC_ERROR; |
206 | } | |
572a5524 TT |
207 | |
208 | py_xmethod_matcher_list = std::move (temp); | |
883964a7 SC |
209 | } |
210 | else | |
211 | { | |
212 | gdbpy_print_stack (); | |
883964a7 SC |
213 | return EXT_LANG_RC_ERROR; |
214 | } | |
215 | } | |
216 | ||
7780f186 | 217 | gdbpy_ref<> list_iter (PyObject_GetIter (py_xmethod_matcher_list.get ())); |
883964a7 SC |
218 | if (list_iter == NULL) |
219 | { | |
220 | gdbpy_print_stack (); | |
883964a7 SC |
221 | return EXT_LANG_RC_ERROR; |
222 | } | |
572a5524 | 223 | while (true) |
883964a7 | 224 | { |
7780f186 | 225 | gdbpy_ref<> matcher (PyIter_Next (list_iter.get ())); |
572a5524 TT |
226 | if (matcher == NULL) |
227 | { | |
228 | if (PyErr_Occurred ()) | |
229 | { | |
230 | gdbpy_print_stack (); | |
231 | return EXT_LANG_RC_ERROR; | |
232 | } | |
233 | break; | |
234 | } | |
235 | ||
7780f186 TT |
236 | gdbpy_ref<> match_result (invoke_match_method (matcher.get (), |
237 | py_type.get (), | |
238 | method_name)); | |
883964a7 SC |
239 | |
240 | if (match_result == NULL) | |
241 | { | |
242 | gdbpy_print_stack (); | |
883964a7 SC |
243 | return EXT_LANG_RC_ERROR; |
244 | } | |
245 | if (match_result == Py_None) | |
246 | ; /* This means there was no match. */ | |
572a5524 | 247 | else if (PySequence_Check (match_result.get ())) |
883964a7 | 248 | { |
7780f186 | 249 | gdbpy_ref<> iter (PyObject_GetIter (match_result.get ())); |
883964a7 SC |
250 | |
251 | if (iter == NULL) | |
252 | { | |
253 | gdbpy_print_stack (); | |
883964a7 SC |
254 | return EXT_LANG_RC_ERROR; |
255 | } | |
572a5524 | 256 | while (true) |
883964a7 SC |
257 | { |
258 | struct xmethod_worker *worker; | |
259 | ||
7780f186 | 260 | gdbpy_ref<> py_worker (PyIter_Next (iter.get ())); |
572a5524 TT |
261 | if (py_worker == NULL) |
262 | { | |
263 | if (PyErr_Occurred ()) | |
264 | { | |
265 | gdbpy_print_stack (); | |
266 | return EXT_LANG_RC_ERROR; | |
267 | } | |
268 | break; | |
269 | } | |
270 | ||
ba18742c | 271 | worker = new python_xmethod_worker (py_worker.get (), |
572a5524 | 272 | py_type.get ()); |
ba18742c SM |
273 | |
274 | dm_vec->emplace_back (worker); | |
883964a7 SC |
275 | } |
276 | } | |
277 | else | |
278 | { | |
279 | struct xmethod_worker *worker; | |
280 | ||
ba18742c | 281 | worker = new python_xmethod_worker (match_result.get (), |
572a5524 | 282 | py_type.get ()); |
ba18742c | 283 | dm_vec->emplace_back (worker); |
883964a7 | 284 | } |
883964a7 | 285 | } |
883964a7 | 286 | |
883964a7 SC |
287 | return EXT_LANG_RC_OK; |
288 | } | |
289 | ||
ba18742c | 290 | /* See declaration. */ |
883964a7 | 291 | |
ba18742c | 292 | ext_lang_rc |
6b1747cd | 293 | python_xmethod_worker::do_get_arg_types (std::vector<type *> *arg_types) |
883964a7 | 294 | { |
b1ce6568 SM |
295 | /* The gdbpy_enter object needs to be placed first, so that it's the last to |
296 | be destroyed. */ | |
297 | gdbpy_enter enter_py (get_current_arch (), current_language); | |
14b122bf | 298 | struct type *obj_type; |
883964a7 | 299 | int i = 1, arg_count; |
7780f186 | 300 | gdbpy_ref<> list_iter; |
883964a7 | 301 | |
7780f186 | 302 | gdbpy_ref<> get_arg_types_method |
ba18742c | 303 | (PyObject_GetAttrString (m_py_worker, get_arg_types_method_name)); |
883964a7 SC |
304 | if (get_arg_types_method == NULL) |
305 | { | |
306 | gdbpy_print_stack (); | |
883964a7 SC |
307 | return EXT_LANG_RC_ERROR; |
308 | } | |
883964a7 | 309 | |
7780f186 | 310 | gdbpy_ref<> py_argtype_list |
ba18742c | 311 | (PyObject_CallMethodObjArgs (m_py_worker, py_get_arg_types_method_name, |
14b122bf | 312 | NULL)); |
883964a7 SC |
313 | if (py_argtype_list == NULL) |
314 | { | |
315 | gdbpy_print_stack (); | |
883964a7 SC |
316 | return EXT_LANG_RC_ERROR; |
317 | } | |
14b122bf | 318 | |
883964a7 SC |
319 | if (py_argtype_list == Py_None) |
320 | arg_count = 0; | |
14b122bf | 321 | else if (PySequence_Check (py_argtype_list.get ())) |
883964a7 | 322 | { |
14b122bf | 323 | arg_count = PySequence_Size (py_argtype_list.get ()); |
883964a7 SC |
324 | if (arg_count == -1) |
325 | { | |
326 | gdbpy_print_stack (); | |
883964a7 SC |
327 | return EXT_LANG_RC_ERROR; |
328 | } | |
329 | ||
14b122bf | 330 | list_iter.reset (PyObject_GetIter (py_argtype_list.get ())); |
883964a7 SC |
331 | if (list_iter == NULL) |
332 | { | |
333 | gdbpy_print_stack (); | |
883964a7 SC |
334 | return EXT_LANG_RC_ERROR; |
335 | } | |
883964a7 SC |
336 | } |
337 | else | |
338 | arg_count = 1; | |
339 | ||
340 | /* Include the 'this' argument in the size. */ | |
6b1747cd | 341 | arg_types->resize (arg_count + 1); |
883964a7 SC |
342 | i = 1; |
343 | if (list_iter != NULL) | |
344 | { | |
14b122bf | 345 | while (true) |
883964a7 | 346 | { |
7780f186 | 347 | gdbpy_ref<> item (PyIter_Next (list_iter.get ())); |
14b122bf TT |
348 | if (item == NULL) |
349 | { | |
350 | if (PyErr_Occurred ()) | |
351 | { | |
352 | gdbpy_print_stack (); | |
353 | return EXT_LANG_RC_ERROR; | |
354 | } | |
355 | break; | |
356 | } | |
883964a7 | 357 | |
14b122bf | 358 | struct type *arg_type = type_object_to_type (item.get ()); |
883964a7 SC |
359 | if (arg_type == NULL) |
360 | { | |
361 | PyErr_SetString (PyExc_TypeError, | |
362 | _("Arg type returned by the get_arg_types " | |
363 | "method of a debug method worker object is " | |
364 | "not a gdb.Type object.")); | |
14b122bf | 365 | return EXT_LANG_RC_ERROR; |
883964a7 SC |
366 | } |
367 | ||
6b1747cd | 368 | (*arg_types)[i] = arg_type; |
883964a7 SC |
369 | i++; |
370 | } | |
371 | } | |
372 | else if (arg_count == 1) | |
373 | { | |
374 | /* py_argtype_list is not actually a list but a single gdb.Type | |
375 | object. */ | |
14b122bf | 376 | struct type *arg_type = type_object_to_type (py_argtype_list.get ()); |
883964a7 SC |
377 | |
378 | if (arg_type == NULL) | |
379 | { | |
380 | PyErr_SetString (PyExc_TypeError, | |
381 | _("Arg type returned by the get_arg_types method " | |
382 | "of an xmethod worker object is not a gdb.Type " | |
383 | "object.")); | |
14b122bf | 384 | return EXT_LANG_RC_ERROR; |
883964a7 SC |
385 | } |
386 | else | |
387 | { | |
6b1747cd | 388 | (*arg_types)[i] = arg_type; |
883964a7 SC |
389 | i++; |
390 | } | |
391 | } | |
883964a7 SC |
392 | |
393 | /* Add the type of 'this' as the first argument. The 'this' pointer should | |
394 | be a 'const' value. Hence, create a 'const' variant of the 'this' pointer | |
395 | type. */ | |
ba18742c | 396 | obj_type = type_object_to_type (m_this_type); |
6b1747cd PA |
397 | (*arg_types)[0] = make_cv_type (1, 0, lookup_pointer_type (obj_type), |
398 | NULL); | |
883964a7 SC |
399 | |
400 | return EXT_LANG_RC_OK; | |
401 | } | |
402 | ||
ba18742c | 403 | /* See declaration. */ |
2ce1cdbf | 404 | |
ba18742c | 405 | ext_lang_rc |
6b1747cd PA |
406 | python_xmethod_worker::do_get_result_type (value *obj, |
407 | gdb::array_view<value *> args, | |
ba18742c | 408 | type **result_type_ptr) |
2ce1cdbf | 409 | { |
2ce1cdbf | 410 | struct type *obj_type, *this_type; |
2ce1cdbf DE |
411 | int i; |
412 | ||
14b122bf | 413 | gdbpy_enter enter_py (get_current_arch (), current_language); |
2ce1cdbf DE |
414 | |
415 | /* First see if there is a get_result_type method. | |
416 | If not this could be an old xmethod (pre 7.9.1). */ | |
7780f186 | 417 | gdbpy_ref<> get_result_type_method |
ba18742c | 418 | (PyObject_GetAttrString (m_py_worker, get_result_type_method_name)); |
2ce1cdbf DE |
419 | if (get_result_type_method == NULL) |
420 | { | |
421 | PyErr_Clear (); | |
2ce1cdbf DE |
422 | *result_type_ptr = NULL; |
423 | return EXT_LANG_RC_OK; | |
424 | } | |
2ce1cdbf DE |
425 | |
426 | obj_type = check_typedef (value_type (obj)); | |
ba18742c | 427 | this_type = check_typedef (type_object_to_type (m_this_type)); |
2ce1cdbf DE |
428 | if (TYPE_CODE (obj_type) == TYPE_CODE_PTR) |
429 | { | |
430 | struct type *this_ptr = lookup_pointer_type (this_type); | |
431 | ||
432 | if (!types_equal (obj_type, this_ptr)) | |
433 | obj = value_cast (this_ptr, obj); | |
434 | } | |
3fcf899d | 435 | else if (TYPE_IS_REFERENCE (obj_type)) |
2ce1cdbf | 436 | { |
3fcf899d AV |
437 | struct type *this_ref |
438 | = lookup_reference_type (this_type, TYPE_CODE (obj_type)); | |
2ce1cdbf DE |
439 | |
440 | if (!types_equal (obj_type, this_ref)) | |
441 | obj = value_cast (this_ref, obj); | |
442 | } | |
443 | else | |
444 | { | |
445 | if (!types_equal (obj_type, this_type)) | |
446 | obj = value_cast (this_type, obj); | |
447 | } | |
7780f186 | 448 | gdbpy_ref<> py_value_obj (value_to_value_object (obj)); |
2ce1cdbf | 449 | if (py_value_obj == NULL) |
14b122bf TT |
450 | { |
451 | gdbpy_print_stack (); | |
452 | return EXT_LANG_RC_ERROR; | |
453 | } | |
2ce1cdbf | 454 | |
6b1747cd | 455 | gdbpy_ref<> py_arg_tuple (PyTuple_New (args.size () + 1)); |
2ce1cdbf | 456 | if (py_arg_tuple == NULL) |
14b122bf TT |
457 | { |
458 | gdbpy_print_stack (); | |
459 | return EXT_LANG_RC_ERROR; | |
460 | } | |
2ce1cdbf | 461 | |
14b122bf TT |
462 | /* PyTuple_SET_ITEM steals the reference of the element, hence the |
463 | release. */ | |
464 | PyTuple_SET_ITEM (py_arg_tuple.get (), 0, py_value_obj.release ()); | |
2ce1cdbf | 465 | |
6b1747cd | 466 | for (i = 0; i < args.size (); i++) |
2ce1cdbf DE |
467 | { |
468 | PyObject *py_value_arg = value_to_value_object (args[i]); | |
469 | ||
470 | if (py_value_arg == NULL) | |
14b122bf TT |
471 | { |
472 | gdbpy_print_stack (); | |
473 | return EXT_LANG_RC_ERROR; | |
474 | } | |
475 | PyTuple_SET_ITEM (py_arg_tuple.get (), i + 1, py_value_arg); | |
2ce1cdbf DE |
476 | } |
477 | ||
7780f186 | 478 | gdbpy_ref<> py_result_type |
14b122bf | 479 | (PyObject_CallObject (get_result_type_method.get (), py_arg_tuple.get ())); |
2ce1cdbf | 480 | if (py_result_type == NULL) |
14b122bf TT |
481 | { |
482 | gdbpy_print_stack (); | |
483 | return EXT_LANG_RC_ERROR; | |
484 | } | |
2ce1cdbf | 485 | |
14b122bf | 486 | *result_type_ptr = type_object_to_type (py_result_type.get ()); |
2ce1cdbf DE |
487 | if (*result_type_ptr == NULL) |
488 | { | |
489 | PyErr_SetString (PyExc_TypeError, | |
490 | _("Type returned by the get_result_type method of an" | |
491 | " xmethod worker object is not a gdb.Type object.")); | |
14b122bf TT |
492 | gdbpy_print_stack (); |
493 | return EXT_LANG_RC_ERROR; | |
2ce1cdbf DE |
494 | } |
495 | ||
2ce1cdbf | 496 | return EXT_LANG_RC_OK; |
2ce1cdbf DE |
497 | } |
498 | ||
ba18742c | 499 | /* See declaration. */ |
883964a7 SC |
500 | |
501 | struct value * | |
6b1747cd PA |
502 | python_xmethod_worker::invoke (struct value *obj, |
503 | gdb::array_view<value *> args) | |
883964a7 | 504 | { |
ba18742c SM |
505 | gdbpy_enter enter_py (get_current_arch (), current_language); |
506 | ||
883964a7 | 507 | int i; |
883964a7 SC |
508 | struct type *obj_type, *this_type; |
509 | struct value *res = NULL; | |
883964a7 SC |
510 | |
511 | obj_type = check_typedef (value_type (obj)); | |
ba18742c | 512 | this_type = check_typedef (type_object_to_type (m_this_type)); |
883964a7 SC |
513 | if (TYPE_CODE (obj_type) == TYPE_CODE_PTR) |
514 | { | |
515 | struct type *this_ptr = lookup_pointer_type (this_type); | |
516 | ||
517 | if (!types_equal (obj_type, this_ptr)) | |
518 | obj = value_cast (this_ptr, obj); | |
519 | } | |
a65cfae5 | 520 | else if (TYPE_IS_REFERENCE (obj_type)) |
883964a7 | 521 | { |
a65cfae5 AV |
522 | struct type *this_ref |
523 | = lookup_reference_type (this_type, TYPE_CODE (obj_type)); | |
883964a7 SC |
524 | |
525 | if (!types_equal (obj_type, this_ref)) | |
526 | obj = value_cast (this_ref, obj); | |
527 | } | |
528 | else | |
529 | { | |
530 | if (!types_equal (obj_type, this_type)) | |
531 | obj = value_cast (this_type, obj); | |
532 | } | |
7780f186 | 533 | gdbpy_ref<> py_value_obj (value_to_value_object (obj)); |
883964a7 SC |
534 | if (py_value_obj == NULL) |
535 | { | |
536 | gdbpy_print_stack (); | |
537 | error (_("Error while executing Python code.")); | |
538 | } | |
883964a7 | 539 | |
6b1747cd | 540 | gdbpy_ref<> py_arg_tuple (PyTuple_New (args.size () + 1)); |
883964a7 SC |
541 | if (py_arg_tuple == NULL) |
542 | { | |
543 | gdbpy_print_stack (); | |
544 | error (_("Error while executing Python code.")); | |
545 | } | |
883964a7 | 546 | |
14b122bf TT |
547 | /* PyTuple_SET_ITEM steals the reference of the element, hence the |
548 | release. */ | |
549 | PyTuple_SET_ITEM (py_arg_tuple.get (), 0, py_value_obj.release ()); | |
883964a7 | 550 | |
6b1747cd | 551 | for (i = 0; i < args.size (); i++) |
883964a7 SC |
552 | { |
553 | PyObject *py_value_arg = value_to_value_object (args[i]); | |
554 | ||
555 | if (py_value_arg == NULL) | |
556 | { | |
557 | gdbpy_print_stack (); | |
558 | error (_("Error while executing Python code.")); | |
559 | } | |
560 | ||
14b122bf | 561 | PyTuple_SET_ITEM (py_arg_tuple.get (), i + 1, py_value_arg); |
883964a7 SC |
562 | } |
563 | ||
ba18742c | 564 | gdbpy_ref<> py_result (PyObject_CallObject (m_py_worker, |
7780f186 | 565 | py_arg_tuple.get ())); |
883964a7 SC |
566 | if (py_result == NULL) |
567 | { | |
568 | gdbpy_print_stack (); | |
569 | error (_("Error while executing Python code.")); | |
570 | } | |
883964a7 SC |
571 | |
572 | if (py_result != Py_None) | |
573 | { | |
14b122bf | 574 | res = convert_value_from_python (py_result.get ()); |
883964a7 SC |
575 | if (res == NULL) |
576 | { | |
577 | gdbpy_print_stack (); | |
578 | error (_("Error while executing Python code.")); | |
579 | } | |
580 | } | |
581 | else | |
582 | { | |
583 | res = allocate_value (lookup_typename (python_language, python_gdbarch, | |
584 | "void", NULL, 0)); | |
585 | } | |
586 | ||
883964a7 SC |
587 | return res; |
588 | } | |
589 | ||
ba18742c SM |
590 | python_xmethod_worker::python_xmethod_worker (PyObject *py_worker, |
591 | PyObject *this_type) | |
592 | : xmethod_worker (&extension_language_python), | |
593 | m_py_worker (py_worker), m_this_type (this_type) | |
883964a7 | 594 | { |
ba18742c | 595 | gdb_assert (m_py_worker != NULL && m_this_type != NULL); |
883964a7 | 596 | |
883964a7 SC |
597 | Py_INCREF (py_worker); |
598 | Py_INCREF (this_type); | |
883964a7 SC |
599 | } |
600 | ||
601 | int | |
602 | gdbpy_initialize_xmethods (void) | |
603 | { | |
604 | py_match_method_name = PyString_FromString (match_method_name); | |
605 | if (py_match_method_name == NULL) | |
606 | return -1; | |
607 | ||
883964a7 SC |
608 | py_get_arg_types_method_name |
609 | = PyString_FromString (get_arg_types_method_name); | |
610 | if (py_get_arg_types_method_name == NULL) | |
611 | return -1; | |
612 | ||
613 | return 1; | |
614 | } |