| 1 | /* Support for debug methods in Python. |
| 2 | |
| 3 | Copyright (C) 2013-2018 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 python_xmethod_worker : xmethod_worker |
| 41 | { |
| 42 | python_xmethod_worker (PyObject *worker, PyObject *this_type); |
| 43 | ~python_xmethod_worker (); |
| 44 | |
| 45 | DISABLE_COPY_AND_ASSIGN (python_xmethod_worker); |
| 46 | |
| 47 | /* Implementation of xmethod_worker::invoke for Python. */ |
| 48 | |
| 49 | value *invoke (value *obj, value **args, int nargs) override; |
| 50 | |
| 51 | /* Implementation of xmethod_worker::clone for Python. */ |
| 52 | |
| 53 | xmethod_worker_up clone () override; |
| 54 | |
| 55 | /* Implementation of xmethod_worker::do_get_arg_types for Python. */ |
| 56 | |
| 57 | ext_lang_rc do_get_arg_types (int *nargs, type ***arg_types) override; |
| 58 | |
| 59 | /* Implementation of xmethod_worker::do_get_result_type for Python. |
| 60 | |
| 61 | For backward compatibility with 7.9, which did not support getting the |
| 62 | result type, if the get_result_type operation is not provided by WORKER |
| 63 | then EXT_LANG_RC_OK is returned and NULL is returned in *RESULT_TYPE. */ |
| 64 | |
| 65 | ext_lang_rc do_get_result_type (value *obj, value **args, int nargs, |
| 66 | type **result_type_ptr) override; |
| 67 | |
| 68 | private: |
| 69 | |
| 70 | PyObject *m_py_worker; |
| 71 | PyObject *m_this_type; |
| 72 | }; |
| 73 | |
| 74 | python_xmethod_worker::~python_xmethod_worker () |
| 75 | { |
| 76 | /* We don't do much here, but we still need the GIL. */ |
| 77 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 78 | |
| 79 | Py_DECREF (m_py_worker); |
| 80 | Py_DECREF (m_this_type); |
| 81 | } |
| 82 | |
| 83 | /* See declaration. */ |
| 84 | |
| 85 | xmethod_worker_up |
| 86 | python_xmethod_worker::clone () |
| 87 | { |
| 88 | /* We don't do much here, but we still need the GIL. */ |
| 89 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 90 | |
| 91 | xmethod_worker *worker = new python_xmethod_worker (m_py_worker, m_this_type); |
| 92 | |
| 93 | return xmethod_worker_up (worker); |
| 94 | } |
| 95 | |
| 96 | /* Invoke the "match" method of the MATCHER and return a new reference |
| 97 | to the result. Returns NULL on error. */ |
| 98 | |
| 99 | static PyObject * |
| 100 | invoke_match_method (PyObject *matcher, PyObject *py_obj_type, |
| 101 | const char *xmethod_name) |
| 102 | { |
| 103 | int enabled; |
| 104 | |
| 105 | gdbpy_ref<> enabled_field (PyObject_GetAttrString (matcher, |
| 106 | enabled_field_name)); |
| 107 | if (enabled_field == NULL) |
| 108 | return NULL; |
| 109 | |
| 110 | enabled = PyObject_IsTrue (enabled_field.get ()); |
| 111 | if (enabled == -1) |
| 112 | return NULL; |
| 113 | if (enabled == 0) |
| 114 | { |
| 115 | /* Return 'None' if the matcher is not enabled. */ |
| 116 | Py_RETURN_NONE; |
| 117 | } |
| 118 | |
| 119 | gdbpy_ref<> match_method (PyObject_GetAttrString (matcher, |
| 120 | match_method_name)); |
| 121 | if (match_method == NULL) |
| 122 | return NULL; |
| 123 | |
| 124 | gdbpy_ref<> py_xmethod_name (PyString_FromString (xmethod_name)); |
| 125 | if (py_xmethod_name == NULL) |
| 126 | return NULL; |
| 127 | |
| 128 | return PyObject_CallMethodObjArgs (matcher, py_match_method_name, |
| 129 | py_obj_type, py_xmethod_name.get (), |
| 130 | NULL); |
| 131 | } |
| 132 | |
| 133 | /* Implementation of get_matching_xmethod_workers for Python. */ |
| 134 | |
| 135 | enum ext_lang_rc |
| 136 | gdbpy_get_matching_xmethod_workers |
| 137 | (const struct extension_language_defn *extlang, |
| 138 | struct type *obj_type, const char *method_name, |
| 139 | std::vector<xmethod_worker_up> *dm_vec) |
| 140 | { |
| 141 | struct objfile *objfile; |
| 142 | PyObject *py_progspace; |
| 143 | |
| 144 | gdb_assert (obj_type != NULL && method_name != NULL); |
| 145 | |
| 146 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 147 | |
| 148 | gdbpy_ref<> py_type (type_to_type_object (obj_type)); |
| 149 | if (py_type == NULL) |
| 150 | { |
| 151 | gdbpy_print_stack (); |
| 152 | return EXT_LANG_RC_ERROR; |
| 153 | } |
| 154 | |
| 155 | /* Create an empty list of debug methods. */ |
| 156 | gdbpy_ref<> py_xmethod_matcher_list (PyList_New (0)); |
| 157 | if (py_xmethod_matcher_list == NULL) |
| 158 | { |
| 159 | gdbpy_print_stack (); |
| 160 | return EXT_LANG_RC_ERROR; |
| 161 | } |
| 162 | |
| 163 | /* Gather debug method matchers registered with the object files. |
| 164 | This could be done differently by iterating over each objfile's matcher |
| 165 | list individually, but there's no data yet to show it's needed. */ |
| 166 | ALL_OBJFILES (objfile) |
| 167 | { |
| 168 | PyObject *py_objfile = objfile_to_objfile_object (objfile); |
| 169 | |
| 170 | if (py_objfile == NULL) |
| 171 | { |
| 172 | gdbpy_print_stack (); |
| 173 | return EXT_LANG_RC_ERROR; |
| 174 | } |
| 175 | |
| 176 | gdbpy_ref<> objfile_matchers (objfpy_get_xmethods (py_objfile, NULL)); |
| 177 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
| 178 | objfile_matchers.get ())); |
| 179 | if (temp == NULL) |
| 180 | { |
| 181 | gdbpy_print_stack (); |
| 182 | return EXT_LANG_RC_ERROR; |
| 183 | } |
| 184 | |
| 185 | py_xmethod_matcher_list = std::move (temp); |
| 186 | } |
| 187 | |
| 188 | /* Gather debug methods matchers registered with the current program |
| 189 | space. */ |
| 190 | py_progspace = pspace_to_pspace_object (current_program_space); |
| 191 | if (py_progspace != NULL) |
| 192 | { |
| 193 | gdbpy_ref<> pspace_matchers (pspy_get_xmethods (py_progspace, NULL)); |
| 194 | |
| 195 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
| 196 | pspace_matchers.get ())); |
| 197 | if (temp == NULL) |
| 198 | { |
| 199 | gdbpy_print_stack (); |
| 200 | return EXT_LANG_RC_ERROR; |
| 201 | } |
| 202 | |
| 203 | py_xmethod_matcher_list = std::move (temp); |
| 204 | } |
| 205 | else |
| 206 | { |
| 207 | gdbpy_print_stack (); |
| 208 | return EXT_LANG_RC_ERROR; |
| 209 | } |
| 210 | |
| 211 | /* Gather debug method matchers registered globally. */ |
| 212 | if (gdb_python_module != NULL |
| 213 | && PyObject_HasAttrString (gdb_python_module, matchers_attr_str)) |
| 214 | { |
| 215 | gdbpy_ref<> gdb_matchers (PyObject_GetAttrString (gdb_python_module, |
| 216 | matchers_attr_str)); |
| 217 | if (gdb_matchers != NULL) |
| 218 | { |
| 219 | gdbpy_ref<> temp (PySequence_Concat (py_xmethod_matcher_list.get (), |
| 220 | gdb_matchers.get ())); |
| 221 | if (temp == NULL) |
| 222 | { |
| 223 | gdbpy_print_stack (); |
| 224 | return EXT_LANG_RC_ERROR; |
| 225 | } |
| 226 | |
| 227 | py_xmethod_matcher_list = std::move (temp); |
| 228 | } |
| 229 | else |
| 230 | { |
| 231 | gdbpy_print_stack (); |
| 232 | return EXT_LANG_RC_ERROR; |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | gdbpy_ref<> list_iter (PyObject_GetIter (py_xmethod_matcher_list.get ())); |
| 237 | if (list_iter == NULL) |
| 238 | { |
| 239 | gdbpy_print_stack (); |
| 240 | return EXT_LANG_RC_ERROR; |
| 241 | } |
| 242 | while (true) |
| 243 | { |
| 244 | gdbpy_ref<> matcher (PyIter_Next (list_iter.get ())); |
| 245 | if (matcher == NULL) |
| 246 | { |
| 247 | if (PyErr_Occurred ()) |
| 248 | { |
| 249 | gdbpy_print_stack (); |
| 250 | return EXT_LANG_RC_ERROR; |
| 251 | } |
| 252 | break; |
| 253 | } |
| 254 | |
| 255 | gdbpy_ref<> match_result (invoke_match_method (matcher.get (), |
| 256 | py_type.get (), |
| 257 | method_name)); |
| 258 | |
| 259 | if (match_result == NULL) |
| 260 | { |
| 261 | gdbpy_print_stack (); |
| 262 | return EXT_LANG_RC_ERROR; |
| 263 | } |
| 264 | if (match_result == Py_None) |
| 265 | ; /* This means there was no match. */ |
| 266 | else if (PySequence_Check (match_result.get ())) |
| 267 | { |
| 268 | gdbpy_ref<> iter (PyObject_GetIter (match_result.get ())); |
| 269 | |
| 270 | if (iter == NULL) |
| 271 | { |
| 272 | gdbpy_print_stack (); |
| 273 | return EXT_LANG_RC_ERROR; |
| 274 | } |
| 275 | while (true) |
| 276 | { |
| 277 | struct xmethod_worker *worker; |
| 278 | |
| 279 | gdbpy_ref<> py_worker (PyIter_Next (iter.get ())); |
| 280 | if (py_worker == NULL) |
| 281 | { |
| 282 | if (PyErr_Occurred ()) |
| 283 | { |
| 284 | gdbpy_print_stack (); |
| 285 | return EXT_LANG_RC_ERROR; |
| 286 | } |
| 287 | break; |
| 288 | } |
| 289 | |
| 290 | worker = new python_xmethod_worker (py_worker.get (), |
| 291 | py_type.get ()); |
| 292 | |
| 293 | dm_vec->emplace_back (worker); |
| 294 | } |
| 295 | } |
| 296 | else |
| 297 | { |
| 298 | struct xmethod_worker *worker; |
| 299 | |
| 300 | worker = new python_xmethod_worker (match_result.get (), |
| 301 | py_type.get ()); |
| 302 | dm_vec->emplace_back (worker); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | return EXT_LANG_RC_OK; |
| 307 | } |
| 308 | |
| 309 | /* See declaration. */ |
| 310 | |
| 311 | ext_lang_rc |
| 312 | python_xmethod_worker::do_get_arg_types (int *nargs, type ***arg_types) |
| 313 | { |
| 314 | /* The gdbpy_enter object needs to be placed first, so that it's the last to |
| 315 | be destroyed. */ |
| 316 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 317 | struct type *obj_type; |
| 318 | int i = 1, arg_count; |
| 319 | gdbpy_ref<> list_iter; |
| 320 | |
| 321 | /* Set nargs to -1 so that any premature return from this function returns |
| 322 | an invalid/unusable number of arg types. */ |
| 323 | *nargs = -1; |
| 324 | |
| 325 | gdbpy_ref<> get_arg_types_method |
| 326 | (PyObject_GetAttrString (m_py_worker, get_arg_types_method_name)); |
| 327 | if (get_arg_types_method == NULL) |
| 328 | { |
| 329 | gdbpy_print_stack (); |
| 330 | return EXT_LANG_RC_ERROR; |
| 331 | } |
| 332 | |
| 333 | gdbpy_ref<> py_argtype_list |
| 334 | (PyObject_CallMethodObjArgs (m_py_worker, py_get_arg_types_method_name, |
| 335 | NULL)); |
| 336 | if (py_argtype_list == NULL) |
| 337 | { |
| 338 | gdbpy_print_stack (); |
| 339 | return EXT_LANG_RC_ERROR; |
| 340 | } |
| 341 | |
| 342 | if (py_argtype_list == Py_None) |
| 343 | arg_count = 0; |
| 344 | else if (PySequence_Check (py_argtype_list.get ())) |
| 345 | { |
| 346 | arg_count = PySequence_Size (py_argtype_list.get ()); |
| 347 | if (arg_count == -1) |
| 348 | { |
| 349 | gdbpy_print_stack (); |
| 350 | return EXT_LANG_RC_ERROR; |
| 351 | } |
| 352 | |
| 353 | list_iter.reset (PyObject_GetIter (py_argtype_list.get ())); |
| 354 | if (list_iter == NULL) |
| 355 | { |
| 356 | gdbpy_print_stack (); |
| 357 | return EXT_LANG_RC_ERROR; |
| 358 | } |
| 359 | } |
| 360 | else |
| 361 | arg_count = 1; |
| 362 | |
| 363 | /* Include the 'this' argument in the size. */ |
| 364 | gdb::unique_xmalloc_ptr<struct type *> type_array |
| 365 | (XCNEWVEC (struct type *, arg_count + 1)); |
| 366 | i = 1; |
| 367 | if (list_iter != NULL) |
| 368 | { |
| 369 | while (true) |
| 370 | { |
| 371 | gdbpy_ref<> item (PyIter_Next (list_iter.get ())); |
| 372 | if (item == NULL) |
| 373 | { |
| 374 | if (PyErr_Occurred ()) |
| 375 | { |
| 376 | gdbpy_print_stack (); |
| 377 | return EXT_LANG_RC_ERROR; |
| 378 | } |
| 379 | break; |
| 380 | } |
| 381 | |
| 382 | struct type *arg_type = type_object_to_type (item.get ()); |
| 383 | if (arg_type == NULL) |
| 384 | { |
| 385 | PyErr_SetString (PyExc_TypeError, |
| 386 | _("Arg type returned by the get_arg_types " |
| 387 | "method of a debug method worker object is " |
| 388 | "not a gdb.Type object.")); |
| 389 | return EXT_LANG_RC_ERROR; |
| 390 | } |
| 391 | |
| 392 | (type_array.get ())[i] = arg_type; |
| 393 | i++; |
| 394 | } |
| 395 | } |
| 396 | else if (arg_count == 1) |
| 397 | { |
| 398 | /* py_argtype_list is not actually a list but a single gdb.Type |
| 399 | object. */ |
| 400 | struct type *arg_type = type_object_to_type (py_argtype_list.get ()); |
| 401 | |
| 402 | if (arg_type == NULL) |
| 403 | { |
| 404 | PyErr_SetString (PyExc_TypeError, |
| 405 | _("Arg type returned by the get_arg_types method " |
| 406 | "of an xmethod worker object is not a gdb.Type " |
| 407 | "object.")); |
| 408 | return EXT_LANG_RC_ERROR; |
| 409 | } |
| 410 | else |
| 411 | { |
| 412 | (type_array.get ())[i] = arg_type; |
| 413 | i++; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | /* Add the type of 'this' as the first argument. The 'this' pointer should |
| 418 | be a 'const' value. Hence, create a 'const' variant of the 'this' pointer |
| 419 | type. */ |
| 420 | obj_type = type_object_to_type (m_this_type); |
| 421 | (type_array.get ())[0] = make_cv_type (1, 0, lookup_pointer_type (obj_type), |
| 422 | NULL); |
| 423 | *nargs = i; |
| 424 | *arg_types = type_array.release (); |
| 425 | |
| 426 | return EXT_LANG_RC_OK; |
| 427 | } |
| 428 | |
| 429 | /* See declaration. */ |
| 430 | |
| 431 | ext_lang_rc |
| 432 | python_xmethod_worker::do_get_result_type (value *obj, value **args, int nargs, |
| 433 | type **result_type_ptr) |
| 434 | { |
| 435 | struct type *obj_type, *this_type; |
| 436 | int i; |
| 437 | |
| 438 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 439 | |
| 440 | /* First see if there is a get_result_type method. |
| 441 | If not this could be an old xmethod (pre 7.9.1). */ |
| 442 | gdbpy_ref<> get_result_type_method |
| 443 | (PyObject_GetAttrString (m_py_worker, get_result_type_method_name)); |
| 444 | if (get_result_type_method == NULL) |
| 445 | { |
| 446 | PyErr_Clear (); |
| 447 | *result_type_ptr = NULL; |
| 448 | return EXT_LANG_RC_OK; |
| 449 | } |
| 450 | |
| 451 | obj_type = check_typedef (value_type (obj)); |
| 452 | this_type = check_typedef (type_object_to_type (m_this_type)); |
| 453 | if (TYPE_CODE (obj_type) == TYPE_CODE_PTR) |
| 454 | { |
| 455 | struct type *this_ptr = lookup_pointer_type (this_type); |
| 456 | |
| 457 | if (!types_equal (obj_type, this_ptr)) |
| 458 | obj = value_cast (this_ptr, obj); |
| 459 | } |
| 460 | else if (TYPE_IS_REFERENCE (obj_type)) |
| 461 | { |
| 462 | struct type *this_ref |
| 463 | = lookup_reference_type (this_type, TYPE_CODE (obj_type)); |
| 464 | |
| 465 | if (!types_equal (obj_type, this_ref)) |
| 466 | obj = value_cast (this_ref, obj); |
| 467 | } |
| 468 | else |
| 469 | { |
| 470 | if (!types_equal (obj_type, this_type)) |
| 471 | obj = value_cast (this_type, obj); |
| 472 | } |
| 473 | gdbpy_ref<> py_value_obj (value_to_value_object (obj)); |
| 474 | if (py_value_obj == NULL) |
| 475 | { |
| 476 | gdbpy_print_stack (); |
| 477 | return EXT_LANG_RC_ERROR; |
| 478 | } |
| 479 | |
| 480 | gdbpy_ref<> py_arg_tuple (PyTuple_New (nargs + 1)); |
| 481 | if (py_arg_tuple == NULL) |
| 482 | { |
| 483 | gdbpy_print_stack (); |
| 484 | return EXT_LANG_RC_ERROR; |
| 485 | } |
| 486 | |
| 487 | /* PyTuple_SET_ITEM steals the reference of the element, hence the |
| 488 | release. */ |
| 489 | PyTuple_SET_ITEM (py_arg_tuple.get (), 0, py_value_obj.release ()); |
| 490 | |
| 491 | for (i = 0; i < nargs; i++) |
| 492 | { |
| 493 | PyObject *py_value_arg = value_to_value_object (args[i]); |
| 494 | |
| 495 | if (py_value_arg == NULL) |
| 496 | { |
| 497 | gdbpy_print_stack (); |
| 498 | return EXT_LANG_RC_ERROR; |
| 499 | } |
| 500 | PyTuple_SET_ITEM (py_arg_tuple.get (), i + 1, py_value_arg); |
| 501 | } |
| 502 | |
| 503 | gdbpy_ref<> py_result_type |
| 504 | (PyObject_CallObject (get_result_type_method.get (), py_arg_tuple.get ())); |
| 505 | if (py_result_type == NULL) |
| 506 | { |
| 507 | gdbpy_print_stack (); |
| 508 | return EXT_LANG_RC_ERROR; |
| 509 | } |
| 510 | |
| 511 | *result_type_ptr = type_object_to_type (py_result_type.get ()); |
| 512 | if (*result_type_ptr == NULL) |
| 513 | { |
| 514 | PyErr_SetString (PyExc_TypeError, |
| 515 | _("Type returned by the get_result_type method of an" |
| 516 | " xmethod worker object is not a gdb.Type object.")); |
| 517 | gdbpy_print_stack (); |
| 518 | return EXT_LANG_RC_ERROR; |
| 519 | } |
| 520 | |
| 521 | return EXT_LANG_RC_OK; |
| 522 | } |
| 523 | |
| 524 | /* See declaration. */ |
| 525 | |
| 526 | struct value * |
| 527 | python_xmethod_worker::invoke (struct value *obj, struct value **args, |
| 528 | int nargs) |
| 529 | { |
| 530 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 531 | |
| 532 | int i; |
| 533 | struct type *obj_type, *this_type; |
| 534 | struct value *res = NULL; |
| 535 | |
| 536 | obj_type = check_typedef (value_type (obj)); |
| 537 | this_type = check_typedef (type_object_to_type (m_this_type)); |
| 538 | if (TYPE_CODE (obj_type) == TYPE_CODE_PTR) |
| 539 | { |
| 540 | struct type *this_ptr = lookup_pointer_type (this_type); |
| 541 | |
| 542 | if (!types_equal (obj_type, this_ptr)) |
| 543 | obj = value_cast (this_ptr, obj); |
| 544 | } |
| 545 | else if (TYPE_IS_REFERENCE (obj_type)) |
| 546 | { |
| 547 | struct type *this_ref |
| 548 | = lookup_reference_type (this_type, TYPE_CODE (obj_type)); |
| 549 | |
| 550 | if (!types_equal (obj_type, this_ref)) |
| 551 | obj = value_cast (this_ref, obj); |
| 552 | } |
| 553 | else |
| 554 | { |
| 555 | if (!types_equal (obj_type, this_type)) |
| 556 | obj = value_cast (this_type, obj); |
| 557 | } |
| 558 | gdbpy_ref<> py_value_obj (value_to_value_object (obj)); |
| 559 | if (py_value_obj == NULL) |
| 560 | { |
| 561 | gdbpy_print_stack (); |
| 562 | error (_("Error while executing Python code.")); |
| 563 | } |
| 564 | |
| 565 | gdbpy_ref<> py_arg_tuple (PyTuple_New (nargs + 1)); |
| 566 | if (py_arg_tuple == NULL) |
| 567 | { |
| 568 | gdbpy_print_stack (); |
| 569 | error (_("Error while executing Python code.")); |
| 570 | } |
| 571 | |
| 572 | /* PyTuple_SET_ITEM steals the reference of the element, hence the |
| 573 | release. */ |
| 574 | PyTuple_SET_ITEM (py_arg_tuple.get (), 0, py_value_obj.release ()); |
| 575 | |
| 576 | for (i = 0; i < nargs; i++) |
| 577 | { |
| 578 | PyObject *py_value_arg = value_to_value_object (args[i]); |
| 579 | |
| 580 | if (py_value_arg == NULL) |
| 581 | { |
| 582 | gdbpy_print_stack (); |
| 583 | error (_("Error while executing Python code.")); |
| 584 | } |
| 585 | |
| 586 | PyTuple_SET_ITEM (py_arg_tuple.get (), i + 1, py_value_arg); |
| 587 | } |
| 588 | |
| 589 | gdbpy_ref<> py_result (PyObject_CallObject (m_py_worker, |
| 590 | py_arg_tuple.get ())); |
| 591 | if (py_result == NULL) |
| 592 | { |
| 593 | gdbpy_print_stack (); |
| 594 | error (_("Error while executing Python code.")); |
| 595 | } |
| 596 | |
| 597 | if (py_result != Py_None) |
| 598 | { |
| 599 | res = convert_value_from_python (py_result.get ()); |
| 600 | if (res == NULL) |
| 601 | { |
| 602 | gdbpy_print_stack (); |
| 603 | error (_("Error while executing Python code.")); |
| 604 | } |
| 605 | } |
| 606 | else |
| 607 | { |
| 608 | res = allocate_value (lookup_typename (python_language, python_gdbarch, |
| 609 | "void", NULL, 0)); |
| 610 | } |
| 611 | |
| 612 | return res; |
| 613 | } |
| 614 | |
| 615 | python_xmethod_worker::python_xmethod_worker (PyObject *py_worker, |
| 616 | PyObject *this_type) |
| 617 | : xmethod_worker (&extension_language_python), |
| 618 | m_py_worker (py_worker), m_this_type (this_type) |
| 619 | { |
| 620 | gdb_assert (m_py_worker != NULL && m_this_type != NULL); |
| 621 | |
| 622 | Py_INCREF (py_worker); |
| 623 | Py_INCREF (this_type); |
| 624 | } |
| 625 | |
| 626 | int |
| 627 | gdbpy_initialize_xmethods (void) |
| 628 | { |
| 629 | py_match_method_name = PyString_FromString (match_method_name); |
| 630 | if (py_match_method_name == NULL) |
| 631 | return -1; |
| 632 | |
| 633 | py_get_arg_types_method_name |
| 634 | = PyString_FromString (get_arg_types_method_name); |
| 635 | if (py_get_arg_types_method_name == NULL) |
| 636 | return -1; |
| 637 | |
| 638 | return 1; |
| 639 | } |