| 1 | /* Support for debug methods in Python. |
| 2 | |
| 3 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
| 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 | #include "py-ref.h" |
| 30 | |
| 31 | static const char enabled_field_name[] = "enabled"; |
| 32 | static const char match_method_name[] = "match"; |
| 33 | static const char get_arg_types_method_name[] = "get_arg_types"; |
| 34 | static const char get_result_type_method_name[] = "get_result_type"; |
| 35 | static const char matchers_attr_str[] = "xmethods"; |
| 36 | |
| 37 | static PyObject *py_match_method_name = NULL; |
| 38 | static PyObject *py_get_arg_types_method_name = NULL; |
| 39 | |
| 40 | struct gdbpy_worker_data |
| 41 | { |
| 42 | PyObject *worker; |
| 43 | PyObject *this_type; |
| 44 | }; |
| 45 | |
| 46 | static struct xmethod_worker *new_python_xmethod_worker (PyObject *item, |
| 47 | PyObject *py_obj_type); |
| 48 | |
| 49 | /* Implementation of free_xmethod_worker_data for Python. */ |
| 50 | |
| 51 | void |
| 52 | gdbpy_free_xmethod_worker_data (const struct extension_language_defn *extlang, |
| 53 | void *data) |
| 54 | { |
| 55 | struct gdbpy_worker_data *worker_data = (struct gdbpy_worker_data *) data; |
| 56 | |
| 57 | gdb_assert (worker_data->worker != NULL && worker_data->this_type != NULL); |
| 58 | |
| 59 | /* We don't do much here, but we still need the GIL. */ |
| 60 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 61 | |
| 62 | Py_DECREF (worker_data->worker); |
| 63 | Py_DECREF (worker_data->this_type); |
| 64 | xfree (worker_data); |
| 65 | } |
| 66 | |
| 67 | /* Implementation of clone_xmethod_worker_data for Python. */ |
| 68 | |
| 69 | void * |
| 70 | gdbpy_clone_xmethod_worker_data (const struct extension_language_defn *extlang, |
| 71 | void *data) |
| 72 | { |
| 73 | struct gdbpy_worker_data *worker_data |
| 74 | = (struct gdbpy_worker_data *) data, *new_data; |
| 75 | |
| 76 | gdb_assert (worker_data->worker != NULL && worker_data->this_type != NULL); |
| 77 | |
| 78 | /* We don't do much here, but we still need the GIL. */ |
| 79 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 80 | |
| 81 | new_data = XCNEW (struct gdbpy_worker_data); |
| 82 | new_data->worker = worker_data->worker; |
| 83 | new_data->this_type = worker_data->this_type; |
| 84 | Py_INCREF (new_data->worker); |
| 85 | Py_INCREF (new_data->this_type); |
| 86 | |
| 87 | return new_data; |
| 88 | } |
| 89 | |
| 90 | /* Invoke the "match" method of the MATCHER and return a new reference |
| 91 | to the result. Returns NULL on error. */ |
| 92 | |
| 93 | static PyObject * |
| 94 | invoke_match_method (PyObject *matcher, PyObject *py_obj_type, |
| 95 | const char *xmethod_name) |
| 96 | { |
| 97 | int enabled; |
| 98 | |
| 99 | gdbpy_ref<> enabled_field (PyObject_GetAttrString (matcher, |
| 100 | enabled_field_name)); |
| 101 | if (enabled_field == NULL) |
| 102 | return NULL; |
| 103 | |
| 104 | enabled = PyObject_IsTrue (enabled_field.get ()); |
| 105 | if (enabled == -1) |
| 106 | return NULL; |
| 107 | if (enabled == 0) |
| 108 | { |
| 109 | /* Return 'None' if the matcher is not enabled. */ |
| 110 | Py_RETURN_NONE; |
| 111 | } |
| 112 | |
| 113 | gdbpy_ref<> match_method (PyObject_GetAttrString (matcher, |
| 114 | match_method_name)); |
| 115 | if (match_method == NULL) |
| 116 | return NULL; |
| 117 | |
| 118 | gdbpy_ref<> py_xmethod_name (PyString_FromString (xmethod_name)); |
| 119 | if (py_xmethod_name == NULL) |
| 120 | return NULL; |
| 121 | |
| 122 | return PyObject_CallMethodObjArgs (matcher, py_match_method_name, |
| 123 | py_obj_type, py_xmethod_name.get (), |
| 124 | NULL); |
| 125 | } |
| 126 | |
| 127 | /* Implementation of get_matching_xmethod_workers for Python. */ |
| 128 | |
| 129 | enum ext_lang_rc |
| 130 | gdbpy_get_matching_xmethod_workers |
| 131 | (const struct extension_language_defn *extlang, |
| 132 | struct type *obj_type, const char *method_name, |
| 133 | xmethod_worker_vec **dm_vec) |
| 134 | { |
| 135 | struct objfile *objfile; |
| 136 | VEC (xmethod_worker_ptr) *worker_vec = NULL; |
| 137 | PyObject *py_progspace; |
| 138 | |
| 139 | gdb_assert (obj_type != NULL && method_name != NULL); |
| 140 | |
| 141 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 142 | |
| 143 | gdbpy_ref<> py_type (type_to_type_object (obj_type)); |
| 144 | if (py_type == NULL) |
| 145 | { |
| 146 | gdbpy_print_stack (); |
| 147 | return EXT_LANG_RC_ERROR; |
| 148 | } |
| 149 | |
| 150 | /* Create an empty list of debug methods. */ |
| 151 | gdbpy_ref<> py_xmethod_matcher_list (PyList_New (0)); |
| 152 | if (py_xmethod_matcher_list == NULL) |
| 153 | { |
| 154 | gdbpy_print_stack (); |
| 155 | return EXT_LANG_RC_ERROR; |
| 156 | } |
| 157 | |
| 158 | /* Gather debug method matchers registered with the object files. |
| 159 | This could be done differently by iterating over each objfile's matcher |
| 160 | list individually, but there's no data yet to show it's needed. */ |
| 161 | ALL_OBJFILES (objfile) |
| 162 | { |
| 163 | PyObject *py_objfile = objfile_to_objfile_object (objfile); |
| 164 | |
| 165 | if (py_objfile == NULL) |
| 166 | { |
| 167 | gdbpy_print_stack (); |
| 168 | return EXT_LANG_RC_ERROR; |
| 169 | } |
| 170 | |
| 171 | gdbpy_ref<> objfile_matchers (objfpy_get_xmethods (py_objfile, NULL)); |
| 172 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
| 173 | objfile_matchers.get ())); |
| 174 | if (temp == NULL) |
| 175 | { |
| 176 | gdbpy_print_stack (); |
| 177 | return EXT_LANG_RC_ERROR; |
| 178 | } |
| 179 | |
| 180 | py_xmethod_matcher_list = std::move (temp); |
| 181 | } |
| 182 | |
| 183 | /* Gather debug methods matchers registered with the current program |
| 184 | space. */ |
| 185 | py_progspace = pspace_to_pspace_object (current_program_space); |
| 186 | if (py_progspace != NULL) |
| 187 | { |
| 188 | gdbpy_ref<> pspace_matchers (pspy_get_xmethods (py_progspace, NULL)); |
| 189 | |
| 190 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
| 191 | pspace_matchers.get ())); |
| 192 | if (temp == NULL) |
| 193 | { |
| 194 | gdbpy_print_stack (); |
| 195 | return EXT_LANG_RC_ERROR; |
| 196 | } |
| 197 | |
| 198 | py_xmethod_matcher_list = std::move (temp); |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | gdbpy_print_stack (); |
| 203 | return EXT_LANG_RC_ERROR; |
| 204 | } |
| 205 | |
| 206 | /* Gather debug method matchers registered globally. */ |
| 207 | if (gdb_python_module != NULL |
| 208 | && PyObject_HasAttrString (gdb_python_module, matchers_attr_str)) |
| 209 | { |
| 210 | gdbpy_ref<> gdb_matchers (PyObject_GetAttrString (gdb_python_module, |
| 211 | matchers_attr_str)); |
| 212 | if (gdb_matchers != NULL) |
| 213 | { |
| 214 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
| 215 | gdb_matchers.get ())); |
| 216 | if (temp == NULL) |
| 217 | { |
| 218 | gdbpy_print_stack (); |
| 219 | return EXT_LANG_RC_ERROR; |
| 220 | } |
| 221 | |
| 222 | py_xmethod_matcher_list = std::move (temp); |
| 223 | } |
| 224 | else |
| 225 | { |
| 226 | gdbpy_print_stack (); |
| 227 | return EXT_LANG_RC_ERROR; |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | gdbpy_ref<> list_iter (PyObject_GetIter (py_xmethod_matcher_list.get ())); |
| 232 | if (list_iter == NULL) |
| 233 | { |
| 234 | gdbpy_print_stack (); |
| 235 | return EXT_LANG_RC_ERROR; |
| 236 | } |
| 237 | while (true) |
| 238 | { |
| 239 | gdbpy_ref<> matcher (PyIter_Next (list_iter.get ())); |
| 240 | if (matcher == NULL) |
| 241 | { |
| 242 | if (PyErr_Occurred ()) |
| 243 | { |
| 244 | gdbpy_print_stack (); |
| 245 | return EXT_LANG_RC_ERROR; |
| 246 | } |
| 247 | break; |
| 248 | } |
| 249 | |
| 250 | gdbpy_ref<> match_result (invoke_match_method (matcher.get (), |
| 251 | py_type.get (), |
| 252 | method_name)); |
| 253 | |
| 254 | if (match_result == NULL) |
| 255 | { |
| 256 | gdbpy_print_stack (); |
| 257 | return EXT_LANG_RC_ERROR; |
| 258 | } |
| 259 | if (match_result == Py_None) |
| 260 | ; /* This means there was no match. */ |
| 261 | else if (PySequence_Check (match_result.get ())) |
| 262 | { |
| 263 | gdbpy_ref<> iter (PyObject_GetIter (match_result.get ())); |
| 264 | |
| 265 | if (iter == NULL) |
| 266 | { |
| 267 | gdbpy_print_stack (); |
| 268 | return EXT_LANG_RC_ERROR; |
| 269 | } |
| 270 | while (true) |
| 271 | { |
| 272 | struct xmethod_worker *worker; |
| 273 | |
| 274 | gdbpy_ref<> py_worker (PyIter_Next (iter.get ())); |
| 275 | if (py_worker == NULL) |
| 276 | { |
| 277 | if (PyErr_Occurred ()) |
| 278 | { |
| 279 | gdbpy_print_stack (); |
| 280 | return EXT_LANG_RC_ERROR; |
| 281 | } |
| 282 | break; |
| 283 | } |
| 284 | |
| 285 | worker = new_python_xmethod_worker (py_worker.get (), |
| 286 | py_type.get ()); |
| 287 | VEC_safe_push (xmethod_worker_ptr, worker_vec, worker); |
| 288 | } |
| 289 | } |
| 290 | else |
| 291 | { |
| 292 | struct xmethod_worker *worker; |
| 293 | |
| 294 | worker = new_python_xmethod_worker (match_result.get (), |
| 295 | py_type.get ()); |
| 296 | VEC_safe_push (xmethod_worker_ptr, worker_vec, worker); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | *dm_vec = worker_vec; |
| 301 | |
| 302 | return EXT_LANG_RC_OK; |
| 303 | } |
| 304 | |
| 305 | /* Implementation of get_xmethod_arg_types for Python. */ |
| 306 | |
| 307 | enum ext_lang_rc |
| 308 | gdbpy_get_xmethod_arg_types (const struct extension_language_defn *extlang, |
| 309 | struct xmethod_worker *worker, |
| 310 | int *nargs, struct type ***arg_types) |
| 311 | { |
| 312 | /* The gdbpy_enter object needs to be placed first, so that it's the last to |
| 313 | be destroyed. */ |
| 314 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 315 | struct gdbpy_worker_data *worker_data |
| 316 | = (struct gdbpy_worker_data *) worker->data; |
| 317 | PyObject *py_worker = worker_data->worker; |
| 318 | struct type *obj_type; |
| 319 | int i = 1, arg_count; |
| 320 | gdbpy_ref<> list_iter; |
| 321 | |
| 322 | /* Set nargs to -1 so that any premature return from this function returns |
| 323 | an invalid/unusable number of arg types. */ |
| 324 | *nargs = -1; |
| 325 | |
| 326 | gdbpy_ref<> get_arg_types_method |
| 327 | (PyObject_GetAttrString (py_worker, get_arg_types_method_name)); |
| 328 | if (get_arg_types_method == NULL) |
| 329 | { |
| 330 | gdbpy_print_stack (); |
| 331 | return EXT_LANG_RC_ERROR; |
| 332 | } |
| 333 | |
| 334 | gdbpy_ref<> py_argtype_list |
| 335 | (PyObject_CallMethodObjArgs (py_worker, py_get_arg_types_method_name, |
| 336 | NULL)); |
| 337 | if (py_argtype_list == NULL) |
| 338 | { |
| 339 | gdbpy_print_stack (); |
| 340 | return EXT_LANG_RC_ERROR; |
| 341 | } |
| 342 | |
| 343 | if (py_argtype_list == Py_None) |
| 344 | arg_count = 0; |
| 345 | else if (PySequence_Check (py_argtype_list.get ())) |
| 346 | { |
| 347 | arg_count = PySequence_Size (py_argtype_list.get ()); |
| 348 | if (arg_count == -1) |
| 349 | { |
| 350 | gdbpy_print_stack (); |
| 351 | return EXT_LANG_RC_ERROR; |
| 352 | } |
| 353 | |
| 354 | list_iter.reset (PyObject_GetIter (py_argtype_list.get ())); |
| 355 | if (list_iter == NULL) |
| 356 | { |
| 357 | gdbpy_print_stack (); |
| 358 | return EXT_LANG_RC_ERROR; |
| 359 | } |
| 360 | } |
| 361 | else |
| 362 | arg_count = 1; |
| 363 | |
| 364 | /* Include the 'this' argument in the size. */ |
| 365 | gdb::unique_xmalloc_ptr<struct type *> type_array |
| 366 | (XCNEWVEC (struct type *, arg_count + 1)); |
| 367 | i = 1; |
| 368 | if (list_iter != NULL) |
| 369 | { |
| 370 | while (true) |
| 371 | { |
| 372 | gdbpy_ref<> item (PyIter_Next (list_iter.get ())); |
| 373 | if (item == NULL) |
| 374 | { |
| 375 | if (PyErr_Occurred ()) |
| 376 | { |
| 377 | gdbpy_print_stack (); |
| 378 | return EXT_LANG_RC_ERROR; |
| 379 | } |
| 380 | break; |
| 381 | } |
| 382 | |
| 383 | struct type *arg_type = type_object_to_type (item.get ()); |
| 384 | if (arg_type == NULL) |
| 385 | { |
| 386 | PyErr_SetString (PyExc_TypeError, |
| 387 | _("Arg type returned by the get_arg_types " |
| 388 | "method of a debug method worker object is " |
| 389 | "not a gdb.Type object.")); |
| 390 | return EXT_LANG_RC_ERROR; |
| 391 | } |
| 392 | |
| 393 | (type_array.get ())[i] = arg_type; |
| 394 | i++; |
| 395 | } |
| 396 | } |
| 397 | else if (arg_count == 1) |
| 398 | { |
| 399 | /* py_argtype_list is not actually a list but a single gdb.Type |
| 400 | object. */ |
| 401 | struct type *arg_type = type_object_to_type (py_argtype_list.get ()); |
| 402 | |
| 403 | if (arg_type == NULL) |
| 404 | { |
| 405 | PyErr_SetString (PyExc_TypeError, |
| 406 | _("Arg type returned by the get_arg_types method " |
| 407 | "of an xmethod worker object is not a gdb.Type " |
| 408 | "object.")); |
| 409 | return EXT_LANG_RC_ERROR; |
| 410 | } |
| 411 | else |
| 412 | { |
| 413 | (type_array.get ())[i] = arg_type; |
| 414 | i++; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | /* Add the type of 'this' as the first argument. The 'this' pointer should |
| 419 | be a 'const' value. Hence, create a 'const' variant of the 'this' pointer |
| 420 | type. */ |
| 421 | obj_type = type_object_to_type (worker_data->this_type); |
| 422 | (type_array.get ())[0] = make_cv_type (1, 0, lookup_pointer_type (obj_type), |
| 423 | NULL); |
| 424 | *nargs = i; |
| 425 | *arg_types = type_array.release (); |
| 426 | |
| 427 | return EXT_LANG_RC_OK; |
| 428 | } |
| 429 | |
| 430 | /* Implementation of get_xmethod_result_type for Python. */ |
| 431 | |
| 432 | enum ext_lang_rc |
| 433 | gdbpy_get_xmethod_result_type (const struct extension_language_defn *extlang, |
| 434 | struct xmethod_worker *worker, |
| 435 | struct value *obj, |
| 436 | struct value **args, int nargs, |
| 437 | struct type **result_type_ptr) |
| 438 | { |
| 439 | struct gdbpy_worker_data *worker_data |
| 440 | = (struct gdbpy_worker_data *) worker->data; |
| 441 | PyObject *py_worker = worker_data->worker; |
| 442 | struct type *obj_type, *this_type; |
| 443 | int i; |
| 444 | |
| 445 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 446 | |
| 447 | /* First see if there is a get_result_type method. |
| 448 | If not this could be an old xmethod (pre 7.9.1). */ |
| 449 | gdbpy_ref<> get_result_type_method |
| 450 | (PyObject_GetAttrString (py_worker, get_result_type_method_name)); |
| 451 | if (get_result_type_method == NULL) |
| 452 | { |
| 453 | PyErr_Clear (); |
| 454 | *result_type_ptr = NULL; |
| 455 | return EXT_LANG_RC_OK; |
| 456 | } |
| 457 | |
| 458 | obj_type = check_typedef (value_type (obj)); |
| 459 | this_type = check_typedef (type_object_to_type (worker_data->this_type)); |
| 460 | if (TYPE_CODE (obj_type) == TYPE_CODE_PTR) |
| 461 | { |
| 462 | struct type *this_ptr = lookup_pointer_type (this_type); |
| 463 | |
| 464 | if (!types_equal (obj_type, this_ptr)) |
| 465 | obj = value_cast (this_ptr, obj); |
| 466 | } |
| 467 | else if (TYPE_IS_REFERENCE (obj_type)) |
| 468 | { |
| 469 | struct type *this_ref |
| 470 | = lookup_reference_type (this_type, TYPE_CODE (obj_type)); |
| 471 | |
| 472 | if (!types_equal (obj_type, this_ref)) |
| 473 | obj = value_cast (this_ref, obj); |
| 474 | } |
| 475 | else |
| 476 | { |
| 477 | if (!types_equal (obj_type, this_type)) |
| 478 | obj = value_cast (this_type, obj); |
| 479 | } |
| 480 | gdbpy_ref<> py_value_obj (value_to_value_object (obj)); |
| 481 | if (py_value_obj == NULL) |
| 482 | { |
| 483 | gdbpy_print_stack (); |
| 484 | return EXT_LANG_RC_ERROR; |
| 485 | } |
| 486 | |
| 487 | gdbpy_ref<> py_arg_tuple (PyTuple_New (nargs + 1)); |
| 488 | if (py_arg_tuple == NULL) |
| 489 | { |
| 490 | gdbpy_print_stack (); |
| 491 | return EXT_LANG_RC_ERROR; |
| 492 | } |
| 493 | |
| 494 | /* PyTuple_SET_ITEM steals the reference of the element, hence the |
| 495 | release. */ |
| 496 | PyTuple_SET_ITEM (py_arg_tuple.get (), 0, py_value_obj.release ()); |
| 497 | |
| 498 | for (i = 0; i < nargs; i++) |
| 499 | { |
| 500 | PyObject *py_value_arg = value_to_value_object (args[i]); |
| 501 | |
| 502 | if (py_value_arg == NULL) |
| 503 | { |
| 504 | gdbpy_print_stack (); |
| 505 | return EXT_LANG_RC_ERROR; |
| 506 | } |
| 507 | PyTuple_SET_ITEM (py_arg_tuple.get (), i + 1, py_value_arg); |
| 508 | } |
| 509 | |
| 510 | gdbpy_ref<> py_result_type |
| 511 | (PyObject_CallObject (get_result_type_method.get (), py_arg_tuple.get ())); |
| 512 | if (py_result_type == NULL) |
| 513 | { |
| 514 | gdbpy_print_stack (); |
| 515 | return EXT_LANG_RC_ERROR; |
| 516 | } |
| 517 | |
| 518 | *result_type_ptr = type_object_to_type (py_result_type.get ()); |
| 519 | if (*result_type_ptr == NULL) |
| 520 | { |
| 521 | PyErr_SetString (PyExc_TypeError, |
| 522 | _("Type returned by the get_result_type method of an" |
| 523 | " xmethod worker object is not a gdb.Type object.")); |
| 524 | gdbpy_print_stack (); |
| 525 | return EXT_LANG_RC_ERROR; |
| 526 | } |
| 527 | |
| 528 | return EXT_LANG_RC_OK; |
| 529 | } |
| 530 | |
| 531 | /* Implementation of invoke_xmethod for Python. */ |
| 532 | |
| 533 | struct value * |
| 534 | gdbpy_invoke_xmethod (const struct extension_language_defn *extlang, |
| 535 | struct xmethod_worker *worker, |
| 536 | struct value *obj, struct value **args, int nargs) |
| 537 | { |
| 538 | int i; |
| 539 | struct type *obj_type, *this_type; |
| 540 | struct value *res = NULL; |
| 541 | struct gdbpy_worker_data *worker_data |
| 542 | = (struct gdbpy_worker_data *) worker->data; |
| 543 | PyObject *xmethod_worker = worker_data->worker; |
| 544 | |
| 545 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 546 | |
| 547 | obj_type = check_typedef (value_type (obj)); |
| 548 | this_type = check_typedef (type_object_to_type (worker_data->this_type)); |
| 549 | if (TYPE_CODE (obj_type) == TYPE_CODE_PTR) |
| 550 | { |
| 551 | struct type *this_ptr = lookup_pointer_type (this_type); |
| 552 | |
| 553 | if (!types_equal (obj_type, this_ptr)) |
| 554 | obj = value_cast (this_ptr, obj); |
| 555 | } |
| 556 | else if (TYPE_IS_REFERENCE (obj_type)) |
| 557 | { |
| 558 | struct type *this_ref |
| 559 | = lookup_reference_type (this_type, TYPE_CODE (obj_type)); |
| 560 | |
| 561 | if (!types_equal (obj_type, this_ref)) |
| 562 | obj = value_cast (this_ref, obj); |
| 563 | } |
| 564 | else |
| 565 | { |
| 566 | if (!types_equal (obj_type, this_type)) |
| 567 | obj = value_cast (this_type, obj); |
| 568 | } |
| 569 | gdbpy_ref<> py_value_obj (value_to_value_object (obj)); |
| 570 | if (py_value_obj == NULL) |
| 571 | { |
| 572 | gdbpy_print_stack (); |
| 573 | error (_("Error while executing Python code.")); |
| 574 | } |
| 575 | |
| 576 | gdbpy_ref<> py_arg_tuple (PyTuple_New (nargs + 1)); |
| 577 | if (py_arg_tuple == NULL) |
| 578 | { |
| 579 | gdbpy_print_stack (); |
| 580 | error (_("Error while executing Python code.")); |
| 581 | } |
| 582 | |
| 583 | /* PyTuple_SET_ITEM steals the reference of the element, hence the |
| 584 | release. */ |
| 585 | PyTuple_SET_ITEM (py_arg_tuple.get (), 0, py_value_obj.release ()); |
| 586 | |
| 587 | for (i = 0; i < nargs; i++) |
| 588 | { |
| 589 | PyObject *py_value_arg = value_to_value_object (args[i]); |
| 590 | |
| 591 | if (py_value_arg == NULL) |
| 592 | { |
| 593 | gdbpy_print_stack (); |
| 594 | error (_("Error while executing Python code.")); |
| 595 | } |
| 596 | |
| 597 | PyTuple_SET_ITEM (py_arg_tuple.get (), i + 1, py_value_arg); |
| 598 | } |
| 599 | |
| 600 | gdbpy_ref<> py_result (PyObject_CallObject (xmethod_worker, |
| 601 | py_arg_tuple.get ())); |
| 602 | if (py_result == NULL) |
| 603 | { |
| 604 | gdbpy_print_stack (); |
| 605 | error (_("Error while executing Python code.")); |
| 606 | } |
| 607 | |
| 608 | if (py_result != Py_None) |
| 609 | { |
| 610 | res = convert_value_from_python (py_result.get ()); |
| 611 | if (res == NULL) |
| 612 | { |
| 613 | gdbpy_print_stack (); |
| 614 | error (_("Error while executing Python code.")); |
| 615 | } |
| 616 | } |
| 617 | else |
| 618 | { |
| 619 | res = allocate_value (lookup_typename (python_language, python_gdbarch, |
| 620 | "void", NULL, 0)); |
| 621 | } |
| 622 | |
| 623 | return res; |
| 624 | } |
| 625 | |
| 626 | /* Creates a new Python xmethod_worker object. |
| 627 | The new object has data of type 'struct gdbpy_worker_data' composed |
| 628 | with the components PY_WORKER and THIS_TYPE. */ |
| 629 | |
| 630 | static struct xmethod_worker * |
| 631 | new_python_xmethod_worker (PyObject *py_worker, PyObject *this_type) |
| 632 | { |
| 633 | struct gdbpy_worker_data *data; |
| 634 | |
| 635 | gdb_assert (py_worker != NULL && this_type != NULL); |
| 636 | |
| 637 | data = XCNEW (struct gdbpy_worker_data); |
| 638 | data->worker = py_worker; |
| 639 | data->this_type = this_type; |
| 640 | Py_INCREF (py_worker); |
| 641 | Py_INCREF (this_type); |
| 642 | |
| 643 | return new_xmethod_worker (&extension_language_python, data); |
| 644 | } |
| 645 | |
| 646 | int |
| 647 | gdbpy_initialize_xmethods (void) |
| 648 | { |
| 649 | py_match_method_name = PyString_FromString (match_method_name); |
| 650 | if (py_match_method_name == NULL) |
| 651 | return -1; |
| 652 | |
| 653 | py_get_arg_types_method_name |
| 654 | = PyString_FromString (get_arg_types_method_name); |
| 655 | if (py_get_arg_types_method_name == NULL) |
| 656 | return -1; |
| 657 | |
| 658 | return 1; |
| 659 | } |