| 1 | /* Python interface to values. |
| 2 | |
| 3 | Copyright (C) 2008-2018 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 "charset.h" |
| 22 | #include "value.h" |
| 23 | #include "language.h" |
| 24 | #include "target-float.h" |
| 25 | #include "valprint.h" |
| 26 | #include "infcall.h" |
| 27 | #include "expression.h" |
| 28 | #include "cp-abi.h" |
| 29 | #include "python.h" |
| 30 | |
| 31 | #include "python-internal.h" |
| 32 | #include "py-ref.h" |
| 33 | |
| 34 | /* Even though Python scalar types directly map to host types, we use |
| 35 | target types here to remain consistent with the values system in |
| 36 | GDB (which uses target arithmetic). */ |
| 37 | |
| 38 | /* Python's integer type corresponds to C's long type. */ |
| 39 | #define builtin_type_pyint builtin_type (python_gdbarch)->builtin_long |
| 40 | |
| 41 | /* Python's float type corresponds to C's double type. */ |
| 42 | #define builtin_type_pyfloat builtin_type (python_gdbarch)->builtin_double |
| 43 | |
| 44 | /* Python's long type corresponds to C's long long type. */ |
| 45 | #define builtin_type_pylong builtin_type (python_gdbarch)->builtin_long_long |
| 46 | |
| 47 | /* Python's long type corresponds to C's long long type. Unsigned version. */ |
| 48 | #define builtin_type_upylong builtin_type \ |
| 49 | (python_gdbarch)->builtin_unsigned_long_long |
| 50 | |
| 51 | #define builtin_type_pybool \ |
| 52 | language_bool_type (python_language, python_gdbarch) |
| 53 | |
| 54 | #define builtin_type_pychar \ |
| 55 | language_string_char_type (python_language, python_gdbarch) |
| 56 | |
| 57 | typedef struct value_object { |
| 58 | PyObject_HEAD |
| 59 | struct value_object *next; |
| 60 | struct value_object *prev; |
| 61 | struct value *value; |
| 62 | PyObject *address; |
| 63 | PyObject *type; |
| 64 | PyObject *dynamic_type; |
| 65 | } value_object; |
| 66 | |
| 67 | /* List of all values which are currently exposed to Python. It is |
| 68 | maintained so that when an objfile is discarded, preserve_values |
| 69 | can copy the values' types if needed. */ |
| 70 | /* This variable is unnecessarily initialized to NULL in order to |
| 71 | work around a linker bug on MacOS. */ |
| 72 | static value_object *values_in_python = NULL; |
| 73 | |
| 74 | /* Called by the Python interpreter when deallocating a value object. */ |
| 75 | static void |
| 76 | valpy_dealloc (PyObject *obj) |
| 77 | { |
| 78 | value_object *self = (value_object *) obj; |
| 79 | |
| 80 | /* Remove SELF from the global list. */ |
| 81 | if (self->prev) |
| 82 | self->prev->next = self->next; |
| 83 | else |
| 84 | { |
| 85 | gdb_assert (values_in_python == self); |
| 86 | values_in_python = self->next; |
| 87 | } |
| 88 | if (self->next) |
| 89 | self->next->prev = self->prev; |
| 90 | |
| 91 | value_decref (self->value); |
| 92 | |
| 93 | if (self->address) |
| 94 | /* Use braces to appease gcc warning. *sigh* */ |
| 95 | { |
| 96 | Py_DECREF (self->address); |
| 97 | } |
| 98 | |
| 99 | if (self->type) |
| 100 | { |
| 101 | Py_DECREF (self->type); |
| 102 | } |
| 103 | |
| 104 | Py_XDECREF (self->dynamic_type); |
| 105 | |
| 106 | Py_TYPE (self)->tp_free (self); |
| 107 | } |
| 108 | |
| 109 | /* Helper to push a Value object on the global list. */ |
| 110 | static void |
| 111 | note_value (value_object *value_obj) |
| 112 | { |
| 113 | value_obj->next = values_in_python; |
| 114 | if (value_obj->next) |
| 115 | value_obj->next->prev = value_obj; |
| 116 | value_obj->prev = NULL; |
| 117 | values_in_python = value_obj; |
| 118 | } |
| 119 | |
| 120 | /* Called when a new gdb.Value object needs to be allocated. Returns NULL on |
| 121 | error, with a python exception set. */ |
| 122 | static PyObject * |
| 123 | valpy_new (PyTypeObject *subtype, PyObject *args, PyObject *keywords) |
| 124 | { |
| 125 | struct value *value = NULL; /* Initialize to appease gcc warning. */ |
| 126 | value_object *value_obj; |
| 127 | |
| 128 | if (PyTuple_Size (args) != 1) |
| 129 | { |
| 130 | PyErr_SetString (PyExc_TypeError, _("Value object creation takes only " |
| 131 | "1 argument")); |
| 132 | return NULL; |
| 133 | } |
| 134 | |
| 135 | value_obj = (value_object *) subtype->tp_alloc (subtype, 1); |
| 136 | if (value_obj == NULL) |
| 137 | { |
| 138 | PyErr_SetString (PyExc_MemoryError, _("Could not allocate memory to " |
| 139 | "create Value object.")); |
| 140 | return NULL; |
| 141 | } |
| 142 | |
| 143 | value = convert_value_from_python (PyTuple_GetItem (args, 0)); |
| 144 | if (value == NULL) |
| 145 | { |
| 146 | subtype->tp_free (value_obj); |
| 147 | return NULL; |
| 148 | } |
| 149 | |
| 150 | value_obj->value = release_value (value).release (); |
| 151 | value_obj->address = NULL; |
| 152 | value_obj->type = NULL; |
| 153 | value_obj->dynamic_type = NULL; |
| 154 | note_value (value_obj); |
| 155 | |
| 156 | return (PyObject *) value_obj; |
| 157 | } |
| 158 | |
| 159 | /* Iterate over all the Value objects, calling preserve_one_value on |
| 160 | each. */ |
| 161 | void |
| 162 | gdbpy_preserve_values (const struct extension_language_defn *extlang, |
| 163 | struct objfile *objfile, htab_t copied_types) |
| 164 | { |
| 165 | value_object *iter; |
| 166 | |
| 167 | for (iter = values_in_python; iter; iter = iter->next) |
| 168 | preserve_one_value (iter->value, objfile, copied_types); |
| 169 | } |
| 170 | |
| 171 | /* Given a value of a pointer type, apply the C unary * operator to it. */ |
| 172 | static PyObject * |
| 173 | valpy_dereference (PyObject *self, PyObject *args) |
| 174 | { |
| 175 | PyObject *result = NULL; |
| 176 | |
| 177 | TRY |
| 178 | { |
| 179 | struct value *res_val; |
| 180 | scoped_value_mark free_values; |
| 181 | |
| 182 | res_val = value_ind (((value_object *) self)->value); |
| 183 | result = value_to_value_object (res_val); |
| 184 | } |
| 185 | CATCH (except, RETURN_MASK_ALL) |
| 186 | { |
| 187 | GDB_PY_HANDLE_EXCEPTION (except); |
| 188 | } |
| 189 | END_CATCH |
| 190 | |
| 191 | return result; |
| 192 | } |
| 193 | |
| 194 | /* Given a value of a pointer type or a reference type, return the value |
| 195 | referenced. The difference between this function and valpy_dereference is |
| 196 | that the latter applies * unary operator to a value, which need not always |
| 197 | result in the value referenced. For example, for a value which is a reference |
| 198 | to an 'int' pointer ('int *'), valpy_dereference will result in a value of |
| 199 | type 'int' while valpy_referenced_value will result in a value of type |
| 200 | 'int *'. */ |
| 201 | |
| 202 | static PyObject * |
| 203 | valpy_referenced_value (PyObject *self, PyObject *args) |
| 204 | { |
| 205 | PyObject *result = NULL; |
| 206 | |
| 207 | TRY |
| 208 | { |
| 209 | struct value *self_val, *res_val; |
| 210 | scoped_value_mark free_values; |
| 211 | |
| 212 | self_val = ((value_object *) self)->value; |
| 213 | switch (TYPE_CODE (check_typedef (value_type (self_val)))) |
| 214 | { |
| 215 | case TYPE_CODE_PTR: |
| 216 | res_val = value_ind (self_val); |
| 217 | break; |
| 218 | case TYPE_CODE_REF: |
| 219 | case TYPE_CODE_RVALUE_REF: |
| 220 | res_val = coerce_ref (self_val); |
| 221 | break; |
| 222 | default: |
| 223 | error(_("Trying to get the referenced value from a value which is " |
| 224 | "neither a pointer nor a reference.")); |
| 225 | } |
| 226 | |
| 227 | result = value_to_value_object (res_val); |
| 228 | } |
| 229 | CATCH (except, RETURN_MASK_ALL) |
| 230 | { |
| 231 | GDB_PY_HANDLE_EXCEPTION (except); |
| 232 | } |
| 233 | END_CATCH |
| 234 | |
| 235 | return result; |
| 236 | } |
| 237 | |
| 238 | /* Return a value which is a reference to the value. */ |
| 239 | |
| 240 | static PyObject * |
| 241 | valpy_reference_value (PyObject *self, PyObject *args, enum type_code refcode) |
| 242 | { |
| 243 | PyObject *result = NULL; |
| 244 | |
| 245 | TRY |
| 246 | { |
| 247 | struct value *self_val; |
| 248 | scoped_value_mark free_values; |
| 249 | |
| 250 | self_val = ((value_object *) self)->value; |
| 251 | result = value_to_value_object (value_ref (self_val, refcode)); |
| 252 | } |
| 253 | CATCH (except, RETURN_MASK_ALL) |
| 254 | { |
| 255 | GDB_PY_HANDLE_EXCEPTION (except); |
| 256 | } |
| 257 | END_CATCH |
| 258 | |
| 259 | return result; |
| 260 | } |
| 261 | |
| 262 | static PyObject * |
| 263 | valpy_lvalue_reference_value (PyObject *self, PyObject *args) |
| 264 | { |
| 265 | return valpy_reference_value (self, args, TYPE_CODE_REF); |
| 266 | } |
| 267 | |
| 268 | static PyObject * |
| 269 | valpy_rvalue_reference_value (PyObject *self, PyObject *args) |
| 270 | { |
| 271 | return valpy_reference_value (self, args, TYPE_CODE_RVALUE_REF); |
| 272 | } |
| 273 | |
| 274 | /* Return a "const" qualified version of the value. */ |
| 275 | |
| 276 | static PyObject * |
| 277 | valpy_const_value (PyObject *self, PyObject *args) |
| 278 | { |
| 279 | PyObject *result = NULL; |
| 280 | |
| 281 | TRY |
| 282 | { |
| 283 | struct value *self_val, *res_val; |
| 284 | scoped_value_mark free_values; |
| 285 | |
| 286 | self_val = ((value_object *) self)->value; |
| 287 | res_val = make_cv_value (1, 0, self_val); |
| 288 | result = value_to_value_object (res_val); |
| 289 | } |
| 290 | CATCH (except, RETURN_MASK_ALL) |
| 291 | { |
| 292 | GDB_PY_HANDLE_EXCEPTION (except); |
| 293 | } |
| 294 | END_CATCH |
| 295 | |
| 296 | return result; |
| 297 | } |
| 298 | |
| 299 | /* Return "&value". */ |
| 300 | static PyObject * |
| 301 | valpy_get_address (PyObject *self, void *closure) |
| 302 | { |
| 303 | value_object *val_obj = (value_object *) self; |
| 304 | |
| 305 | if (!val_obj->address) |
| 306 | { |
| 307 | TRY |
| 308 | { |
| 309 | struct value *res_val; |
| 310 | scoped_value_mark free_values; |
| 311 | |
| 312 | res_val = value_addr (val_obj->value); |
| 313 | val_obj->address = value_to_value_object (res_val); |
| 314 | } |
| 315 | CATCH (except, RETURN_MASK_ALL) |
| 316 | { |
| 317 | val_obj->address = Py_None; |
| 318 | Py_INCREF (Py_None); |
| 319 | } |
| 320 | END_CATCH |
| 321 | } |
| 322 | |
| 323 | Py_XINCREF (val_obj->address); |
| 324 | |
| 325 | return val_obj->address; |
| 326 | } |
| 327 | |
| 328 | /* Return type of the value. */ |
| 329 | static PyObject * |
| 330 | valpy_get_type (PyObject *self, void *closure) |
| 331 | { |
| 332 | value_object *obj = (value_object *) self; |
| 333 | |
| 334 | if (!obj->type) |
| 335 | { |
| 336 | obj->type = type_to_type_object (value_type (obj->value)); |
| 337 | if (!obj->type) |
| 338 | return NULL; |
| 339 | } |
| 340 | Py_INCREF (obj->type); |
| 341 | return obj->type; |
| 342 | } |
| 343 | |
| 344 | /* Return dynamic type of the value. */ |
| 345 | |
| 346 | static PyObject * |
| 347 | valpy_get_dynamic_type (PyObject *self, void *closure) |
| 348 | { |
| 349 | value_object *obj = (value_object *) self; |
| 350 | struct type *type = NULL; |
| 351 | |
| 352 | if (obj->dynamic_type != NULL) |
| 353 | { |
| 354 | Py_INCREF (obj->dynamic_type); |
| 355 | return obj->dynamic_type; |
| 356 | } |
| 357 | |
| 358 | TRY |
| 359 | { |
| 360 | struct value *val = obj->value; |
| 361 | scoped_value_mark free_values; |
| 362 | |
| 363 | type = value_type (val); |
| 364 | type = check_typedef (type); |
| 365 | |
| 366 | if (((TYPE_CODE (type) == TYPE_CODE_PTR) || TYPE_IS_REFERENCE (type)) |
| 367 | && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)) |
| 368 | { |
| 369 | struct value *target; |
| 370 | int was_pointer = TYPE_CODE (type) == TYPE_CODE_PTR; |
| 371 | |
| 372 | if (was_pointer) |
| 373 | target = value_ind (val); |
| 374 | else |
| 375 | target = coerce_ref (val); |
| 376 | type = value_rtti_type (target, NULL, NULL, NULL); |
| 377 | |
| 378 | if (type) |
| 379 | { |
| 380 | if (was_pointer) |
| 381 | type = lookup_pointer_type (type); |
| 382 | else |
| 383 | type = lookup_lvalue_reference_type (type); |
| 384 | } |
| 385 | } |
| 386 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
| 387 | type = value_rtti_type (val, NULL, NULL, NULL); |
| 388 | else |
| 389 | { |
| 390 | /* Re-use object's static type. */ |
| 391 | type = NULL; |
| 392 | } |
| 393 | } |
| 394 | CATCH (except, RETURN_MASK_ALL) |
| 395 | { |
| 396 | GDB_PY_HANDLE_EXCEPTION (except); |
| 397 | } |
| 398 | END_CATCH |
| 399 | |
| 400 | if (type == NULL) |
| 401 | obj->dynamic_type = valpy_get_type (self, NULL); |
| 402 | else |
| 403 | obj->dynamic_type = type_to_type_object (type); |
| 404 | |
| 405 | Py_XINCREF (obj->dynamic_type); |
| 406 | return obj->dynamic_type; |
| 407 | } |
| 408 | |
| 409 | /* Implementation of gdb.Value.lazy_string ([encoding] [, length]) -> |
| 410 | string. Return a PyObject representing a lazy_string_object type. |
| 411 | A lazy string is a pointer to a string with an optional encoding and |
| 412 | length. If ENCODING is not given, encoding is set to None. If an |
| 413 | ENCODING is provided the encoding parameter is set to ENCODING, but |
| 414 | the string is not encoded. |
| 415 | If LENGTH is provided then the length parameter is set to LENGTH. |
| 416 | Otherwise if the value is an array of known length then the array's length |
| 417 | is used. Otherwise the length will be set to -1 (meaning first null of |
| 418 | appropriate with). |
| 419 | |
| 420 | Note: In order to not break any existing uses this allows creating |
| 421 | lazy strings from anything. PR 20769. E.g., |
| 422 | gdb.parse_and_eval("my_int_variable").lazy_string(). |
| 423 | "It's easier to relax restrictions than it is to impose them after the |
| 424 | fact." So we should be flagging any unintended uses as errors, but it's |
| 425 | perhaps too late for that. */ |
| 426 | |
| 427 | static PyObject * |
| 428 | valpy_lazy_string (PyObject *self, PyObject *args, PyObject *kw) |
| 429 | { |
| 430 | gdb_py_longest length = -1; |
| 431 | struct value *value = ((value_object *) self)->value; |
| 432 | const char *user_encoding = NULL; |
| 433 | static const char *keywords[] = { "encoding", "length", NULL }; |
| 434 | PyObject *str_obj = NULL; |
| 435 | |
| 436 | if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "|s" GDB_PY_LL_ARG, |
| 437 | keywords, &user_encoding, &length)) |
| 438 | return NULL; |
| 439 | |
| 440 | if (length < -1) |
| 441 | { |
| 442 | PyErr_SetString (PyExc_ValueError, _("Invalid length.")); |
| 443 | return NULL; |
| 444 | } |
| 445 | |
| 446 | TRY |
| 447 | { |
| 448 | scoped_value_mark free_values; |
| 449 | struct type *type, *realtype; |
| 450 | CORE_ADDR addr; |
| 451 | |
| 452 | type = value_type (value); |
| 453 | realtype = check_typedef (type); |
| 454 | |
| 455 | switch (TYPE_CODE (realtype)) |
| 456 | { |
| 457 | case TYPE_CODE_ARRAY: |
| 458 | { |
| 459 | LONGEST array_length = -1; |
| 460 | LONGEST low_bound, high_bound; |
| 461 | |
| 462 | /* PR 20786: There's no way to specify an array of length zero. |
| 463 | Record a length of [0,-1] which is how Ada does it. Anything |
| 464 | we do is broken, but this one possible solution. */ |
| 465 | if (get_array_bounds (realtype, &low_bound, &high_bound)) |
| 466 | array_length = high_bound - low_bound + 1; |
| 467 | if (length == -1) |
| 468 | length = array_length; |
| 469 | else if (array_length == -1) |
| 470 | { |
| 471 | type = lookup_array_range_type (TYPE_TARGET_TYPE (realtype), |
| 472 | 0, length - 1); |
| 473 | } |
| 474 | else if (length != array_length) |
| 475 | { |
| 476 | /* We need to create a new array type with the |
| 477 | specified length. */ |
| 478 | if (length > array_length) |
| 479 | error (_("Length is larger than array size.")); |
| 480 | type = lookup_array_range_type (TYPE_TARGET_TYPE (realtype), |
| 481 | low_bound, |
| 482 | low_bound + length - 1); |
| 483 | } |
| 484 | addr = value_address (value); |
| 485 | break; |
| 486 | } |
| 487 | case TYPE_CODE_PTR: |
| 488 | /* If a length is specified we defer creating an array of the |
| 489 | specified width until we need to. */ |
| 490 | addr = value_as_address (value); |
| 491 | break; |
| 492 | default: |
| 493 | /* Should flag an error here. PR 20769. */ |
| 494 | addr = value_address (value); |
| 495 | break; |
| 496 | } |
| 497 | |
| 498 | str_obj = gdbpy_create_lazy_string_object (addr, length, user_encoding, |
| 499 | type); |
| 500 | } |
| 501 | CATCH (except, RETURN_MASK_ALL) |
| 502 | { |
| 503 | GDB_PY_HANDLE_EXCEPTION (except); |
| 504 | } |
| 505 | END_CATCH |
| 506 | |
| 507 | return str_obj; |
| 508 | } |
| 509 | |
| 510 | /* Implementation of gdb.Value.string ([encoding] [, errors] |
| 511 | [, length]) -> string. Return Unicode string with value contents. |
| 512 | If ENCODING is not given, the string is assumed to be encoded in |
| 513 | the target's charset. If LENGTH is provided, only fetch string to |
| 514 | the length provided. */ |
| 515 | |
| 516 | static PyObject * |
| 517 | valpy_string (PyObject *self, PyObject *args, PyObject *kw) |
| 518 | { |
| 519 | int length = -1; |
| 520 | gdb::unique_xmalloc_ptr<gdb_byte> buffer; |
| 521 | struct value *value = ((value_object *) self)->value; |
| 522 | const char *encoding = NULL; |
| 523 | const char *errors = NULL; |
| 524 | const char *user_encoding = NULL; |
| 525 | const char *la_encoding = NULL; |
| 526 | struct type *char_type; |
| 527 | static const char *keywords[] = { "encoding", "errors", "length", NULL }; |
| 528 | |
| 529 | if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "|ssi", keywords, |
| 530 | &user_encoding, &errors, &length)) |
| 531 | return NULL; |
| 532 | |
| 533 | TRY |
| 534 | { |
| 535 | LA_GET_STRING (value, &buffer, &length, &char_type, &la_encoding); |
| 536 | } |
| 537 | CATCH (except, RETURN_MASK_ALL) |
| 538 | { |
| 539 | GDB_PY_HANDLE_EXCEPTION (except); |
| 540 | } |
| 541 | END_CATCH |
| 542 | |
| 543 | encoding = (user_encoding && *user_encoding) ? user_encoding : la_encoding; |
| 544 | return PyUnicode_Decode ((const char *) buffer.get (), |
| 545 | length * TYPE_LENGTH (char_type), |
| 546 | encoding, errors); |
| 547 | } |
| 548 | |
| 549 | /* A helper function that implements the various cast operators. */ |
| 550 | |
| 551 | static PyObject * |
| 552 | valpy_do_cast (PyObject *self, PyObject *args, enum exp_opcode op) |
| 553 | { |
| 554 | PyObject *type_obj, *result = NULL; |
| 555 | struct type *type; |
| 556 | |
| 557 | if (! PyArg_ParseTuple (args, "O", &type_obj)) |
| 558 | return NULL; |
| 559 | |
| 560 | type = type_object_to_type (type_obj); |
| 561 | if (! type) |
| 562 | { |
| 563 | PyErr_SetString (PyExc_RuntimeError, |
| 564 | _("Argument must be a type.")); |
| 565 | return NULL; |
| 566 | } |
| 567 | |
| 568 | TRY |
| 569 | { |
| 570 | struct value *val = ((value_object *) self)->value; |
| 571 | struct value *res_val; |
| 572 | scoped_value_mark free_values; |
| 573 | |
| 574 | if (op == UNOP_DYNAMIC_CAST) |
| 575 | res_val = value_dynamic_cast (type, val); |
| 576 | else if (op == UNOP_REINTERPRET_CAST) |
| 577 | res_val = value_reinterpret_cast (type, val); |
| 578 | else |
| 579 | { |
| 580 | gdb_assert (op == UNOP_CAST); |
| 581 | res_val = value_cast (type, val); |
| 582 | } |
| 583 | |
| 584 | result = value_to_value_object (res_val); |
| 585 | } |
| 586 | CATCH (except, RETURN_MASK_ALL) |
| 587 | { |
| 588 | GDB_PY_HANDLE_EXCEPTION (except); |
| 589 | } |
| 590 | END_CATCH |
| 591 | |
| 592 | return result; |
| 593 | } |
| 594 | |
| 595 | /* Implementation of the "cast" method. */ |
| 596 | |
| 597 | static PyObject * |
| 598 | valpy_cast (PyObject *self, PyObject *args) |
| 599 | { |
| 600 | return valpy_do_cast (self, args, UNOP_CAST); |
| 601 | } |
| 602 | |
| 603 | /* Implementation of the "dynamic_cast" method. */ |
| 604 | |
| 605 | static PyObject * |
| 606 | valpy_dynamic_cast (PyObject *self, PyObject *args) |
| 607 | { |
| 608 | return valpy_do_cast (self, args, UNOP_DYNAMIC_CAST); |
| 609 | } |
| 610 | |
| 611 | /* Implementation of the "reinterpret_cast" method. */ |
| 612 | |
| 613 | static PyObject * |
| 614 | valpy_reinterpret_cast (PyObject *self, PyObject *args) |
| 615 | { |
| 616 | return valpy_do_cast (self, args, UNOP_REINTERPRET_CAST); |
| 617 | } |
| 618 | |
| 619 | static Py_ssize_t |
| 620 | valpy_length (PyObject *self) |
| 621 | { |
| 622 | /* We don't support getting the number of elements in a struct / class. */ |
| 623 | PyErr_SetString (PyExc_NotImplementedError, |
| 624 | _("Invalid operation on gdb.Value.")); |
| 625 | return -1; |
| 626 | } |
| 627 | |
| 628 | /* Return 1 if the gdb.Field object FIELD is present in the value V. |
| 629 | Returns 0 otherwise. If any Python error occurs, -1 is returned. */ |
| 630 | |
| 631 | static int |
| 632 | value_has_field (struct value *v, PyObject *field) |
| 633 | { |
| 634 | struct type *parent_type, *val_type; |
| 635 | enum type_code type_code; |
| 636 | gdbpy_ref<> type_object (PyObject_GetAttrString (field, "parent_type")); |
| 637 | int has_field = 0; |
| 638 | |
| 639 | if (type_object == NULL) |
| 640 | return -1; |
| 641 | |
| 642 | parent_type = type_object_to_type (type_object.get ()); |
| 643 | if (parent_type == NULL) |
| 644 | { |
| 645 | PyErr_SetString (PyExc_TypeError, |
| 646 | _("'parent_type' attribute of gdb.Field object is not a" |
| 647 | "gdb.Type object.")); |
| 648 | return -1; |
| 649 | } |
| 650 | |
| 651 | TRY |
| 652 | { |
| 653 | val_type = value_type (v); |
| 654 | val_type = check_typedef (val_type); |
| 655 | if (TYPE_IS_REFERENCE (val_type) || TYPE_CODE (val_type) == TYPE_CODE_PTR) |
| 656 | val_type = check_typedef (TYPE_TARGET_TYPE (val_type)); |
| 657 | |
| 658 | type_code = TYPE_CODE (val_type); |
| 659 | if ((type_code == TYPE_CODE_STRUCT || type_code == TYPE_CODE_UNION) |
| 660 | && types_equal (val_type, parent_type)) |
| 661 | has_field = 1; |
| 662 | else |
| 663 | has_field = 0; |
| 664 | } |
| 665 | CATCH (except, RETURN_MASK_ALL) |
| 666 | { |
| 667 | GDB_PY_SET_HANDLE_EXCEPTION (except); |
| 668 | } |
| 669 | END_CATCH |
| 670 | |
| 671 | return has_field; |
| 672 | } |
| 673 | |
| 674 | /* Return the value of a flag FLAG_NAME in a gdb.Field object FIELD. |
| 675 | Returns 1 if the flag value is true, 0 if it is false, and -1 if |
| 676 | a Python error occurs. */ |
| 677 | |
| 678 | static int |
| 679 | get_field_flag (PyObject *field, const char *flag_name) |
| 680 | { |
| 681 | gdbpy_ref<> flag_object (PyObject_GetAttrString (field, flag_name)); |
| 682 | |
| 683 | if (flag_object == NULL) |
| 684 | return -1; |
| 685 | |
| 686 | return PyObject_IsTrue (flag_object.get ()); |
| 687 | } |
| 688 | |
| 689 | /* Return the "type" attribute of a gdb.Field object. |
| 690 | Returns NULL on error, with a Python exception set. */ |
| 691 | |
| 692 | static struct type * |
| 693 | get_field_type (PyObject *field) |
| 694 | { |
| 695 | gdbpy_ref<> ftype_obj (PyObject_GetAttrString (field, "type")); |
| 696 | struct type *ftype; |
| 697 | |
| 698 | if (ftype_obj == NULL) |
| 699 | return NULL; |
| 700 | ftype = type_object_to_type (ftype_obj.get ()); |
| 701 | if (ftype == NULL) |
| 702 | PyErr_SetString (PyExc_TypeError, |
| 703 | _("'type' attribute of gdb.Field object is not a " |
| 704 | "gdb.Type object.")); |
| 705 | |
| 706 | return ftype; |
| 707 | } |
| 708 | |
| 709 | /* Given string name or a gdb.Field object corresponding to an element inside |
| 710 | a structure, return its value object. Returns NULL on error, with a python |
| 711 | exception set. */ |
| 712 | |
| 713 | static PyObject * |
| 714 | valpy_getitem (PyObject *self, PyObject *key) |
| 715 | { |
| 716 | struct gdb_exception except = exception_none; |
| 717 | value_object *self_value = (value_object *) self; |
| 718 | gdb::unique_xmalloc_ptr<char> field; |
| 719 | struct type *base_class_type = NULL, *field_type = NULL; |
| 720 | long bitpos = -1; |
| 721 | PyObject *result = NULL; |
| 722 | |
| 723 | if (gdbpy_is_string (key)) |
| 724 | { |
| 725 | field = python_string_to_host_string (key); |
| 726 | if (field == NULL) |
| 727 | return NULL; |
| 728 | } |
| 729 | else if (gdbpy_is_field (key)) |
| 730 | { |
| 731 | int is_base_class, valid_field; |
| 732 | |
| 733 | valid_field = value_has_field (self_value->value, key); |
| 734 | if (valid_field < 0) |
| 735 | return NULL; |
| 736 | else if (valid_field == 0) |
| 737 | { |
| 738 | PyErr_SetString (PyExc_TypeError, |
| 739 | _("Invalid lookup for a field not contained in " |
| 740 | "the value.")); |
| 741 | |
| 742 | return NULL; |
| 743 | } |
| 744 | |
| 745 | is_base_class = get_field_flag (key, "is_base_class"); |
| 746 | if (is_base_class < 0) |
| 747 | return NULL; |
| 748 | else if (is_base_class > 0) |
| 749 | { |
| 750 | base_class_type = get_field_type (key); |
| 751 | if (base_class_type == NULL) |
| 752 | return NULL; |
| 753 | } |
| 754 | else |
| 755 | { |
| 756 | gdbpy_ref<> name_obj (PyObject_GetAttrString (key, "name")); |
| 757 | |
| 758 | if (name_obj == NULL) |
| 759 | return NULL; |
| 760 | |
| 761 | if (name_obj != Py_None) |
| 762 | { |
| 763 | field = python_string_to_host_string (name_obj.get ()); |
| 764 | if (field == NULL) |
| 765 | return NULL; |
| 766 | } |
| 767 | else |
| 768 | { |
| 769 | if (!PyObject_HasAttrString (key, "bitpos")) |
| 770 | { |
| 771 | PyErr_SetString (PyExc_AttributeError, |
| 772 | _("gdb.Field object has no name and no " |
| 773 | "'bitpos' attribute.")); |
| 774 | |
| 775 | return NULL; |
| 776 | } |
| 777 | gdbpy_ref<> bitpos_obj (PyObject_GetAttrString (key, "bitpos")); |
| 778 | if (bitpos_obj == NULL) |
| 779 | return NULL; |
| 780 | if (!gdb_py_int_as_long (bitpos_obj.get (), &bitpos)) |
| 781 | return NULL; |
| 782 | |
| 783 | field_type = get_field_type (key); |
| 784 | if (field_type == NULL) |
| 785 | return NULL; |
| 786 | } |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | TRY |
| 791 | { |
| 792 | struct value *tmp = self_value->value; |
| 793 | struct value *res_val = NULL; |
| 794 | scoped_value_mark free_values; |
| 795 | |
| 796 | if (field) |
| 797 | res_val = value_struct_elt (&tmp, NULL, field.get (), NULL, |
| 798 | "struct/class/union"); |
| 799 | else if (bitpos >= 0) |
| 800 | res_val = value_struct_elt_bitpos (&tmp, bitpos, field_type, |
| 801 | "struct/class/union"); |
| 802 | else if (base_class_type != NULL) |
| 803 | { |
| 804 | struct type *val_type; |
| 805 | |
| 806 | val_type = check_typedef (value_type (tmp)); |
| 807 | if (TYPE_CODE (val_type) == TYPE_CODE_PTR) |
| 808 | res_val = value_cast (lookup_pointer_type (base_class_type), tmp); |
| 809 | else if (TYPE_CODE (val_type) == TYPE_CODE_REF) |
| 810 | res_val = value_cast (lookup_lvalue_reference_type (base_class_type), |
| 811 | tmp); |
| 812 | else if (TYPE_CODE (val_type) == TYPE_CODE_RVALUE_REF) |
| 813 | res_val = value_cast (lookup_rvalue_reference_type (base_class_type), |
| 814 | tmp); |
| 815 | else |
| 816 | res_val = value_cast (base_class_type, tmp); |
| 817 | } |
| 818 | else |
| 819 | { |
| 820 | /* Assume we are attempting an array access, and let the |
| 821 | value code throw an exception if the index has an invalid |
| 822 | type. */ |
| 823 | struct value *idx = convert_value_from_python (key); |
| 824 | |
| 825 | if (idx != NULL) |
| 826 | { |
| 827 | /* Check the value's type is something that can be accessed via |
| 828 | a subscript. */ |
| 829 | struct type *type; |
| 830 | |
| 831 | tmp = coerce_ref (tmp); |
| 832 | type = check_typedef (value_type (tmp)); |
| 833 | if (TYPE_CODE (type) != TYPE_CODE_ARRAY |
| 834 | && TYPE_CODE (type) != TYPE_CODE_PTR) |
| 835 | error (_("Cannot subscript requested type.")); |
| 836 | else |
| 837 | res_val = value_subscript (tmp, value_as_long (idx)); |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | if (res_val) |
| 842 | result = value_to_value_object (res_val); |
| 843 | } |
| 844 | CATCH (ex, RETURN_MASK_ALL) |
| 845 | { |
| 846 | except = ex; |
| 847 | } |
| 848 | END_CATCH |
| 849 | |
| 850 | GDB_PY_HANDLE_EXCEPTION (except); |
| 851 | |
| 852 | return result; |
| 853 | } |
| 854 | |
| 855 | static int |
| 856 | valpy_setitem (PyObject *self, PyObject *key, PyObject *value) |
| 857 | { |
| 858 | PyErr_Format (PyExc_NotImplementedError, |
| 859 | _("Setting of struct elements is not currently supported.")); |
| 860 | return -1; |
| 861 | } |
| 862 | |
| 863 | /* Called by the Python interpreter to perform an inferior function |
| 864 | call on the value. Returns NULL on error, with a python exception set. */ |
| 865 | static PyObject * |
| 866 | valpy_call (PyObject *self, PyObject *args, PyObject *keywords) |
| 867 | { |
| 868 | Py_ssize_t args_count; |
| 869 | struct value *function = ((value_object *) self)->value; |
| 870 | struct value **vargs = NULL; |
| 871 | struct type *ftype = NULL; |
| 872 | PyObject *result = NULL; |
| 873 | |
| 874 | TRY |
| 875 | { |
| 876 | ftype = check_typedef (value_type (function)); |
| 877 | } |
| 878 | CATCH (except, RETURN_MASK_ALL) |
| 879 | { |
| 880 | GDB_PY_HANDLE_EXCEPTION (except); |
| 881 | } |
| 882 | END_CATCH |
| 883 | |
| 884 | if (TYPE_CODE (ftype) != TYPE_CODE_FUNC) |
| 885 | { |
| 886 | PyErr_SetString (PyExc_RuntimeError, |
| 887 | _("Value is not callable (not TYPE_CODE_FUNC).")); |
| 888 | return NULL; |
| 889 | } |
| 890 | |
| 891 | if (! PyTuple_Check (args)) |
| 892 | { |
| 893 | PyErr_SetString (PyExc_TypeError, |
| 894 | _("Inferior arguments must be provided in a tuple.")); |
| 895 | return NULL; |
| 896 | } |
| 897 | |
| 898 | args_count = PyTuple_Size (args); |
| 899 | if (args_count > 0) |
| 900 | { |
| 901 | int i; |
| 902 | |
| 903 | vargs = XALLOCAVEC (struct value *, args_count); |
| 904 | for (i = 0; i < args_count; i++) |
| 905 | { |
| 906 | PyObject *item = PyTuple_GetItem (args, i); |
| 907 | |
| 908 | if (item == NULL) |
| 909 | return NULL; |
| 910 | |
| 911 | vargs[i] = convert_value_from_python (item); |
| 912 | if (vargs[i] == NULL) |
| 913 | return NULL; |
| 914 | } |
| 915 | } |
| 916 | |
| 917 | TRY |
| 918 | { |
| 919 | scoped_value_mark free_values; |
| 920 | |
| 921 | value *return_value |
| 922 | = call_function_by_hand (function, NULL, |
| 923 | gdb::make_array_view (vargs, args_count)); |
| 924 | result = value_to_value_object (return_value); |
| 925 | } |
| 926 | CATCH (except, RETURN_MASK_ALL) |
| 927 | { |
| 928 | GDB_PY_HANDLE_EXCEPTION (except); |
| 929 | } |
| 930 | END_CATCH |
| 931 | |
| 932 | return result; |
| 933 | } |
| 934 | |
| 935 | /* Called by the Python interpreter to obtain string representation |
| 936 | of the object. */ |
| 937 | static PyObject * |
| 938 | valpy_str (PyObject *self) |
| 939 | { |
| 940 | struct value_print_options opts; |
| 941 | |
| 942 | get_user_print_options (&opts); |
| 943 | opts.deref_ref = 0; |
| 944 | |
| 945 | string_file stb; |
| 946 | |
| 947 | TRY |
| 948 | { |
| 949 | common_val_print (((value_object *) self)->value, &stb, 0, |
| 950 | &opts, python_language); |
| 951 | } |
| 952 | CATCH (except, RETURN_MASK_ALL) |
| 953 | { |
| 954 | GDB_PY_HANDLE_EXCEPTION (except); |
| 955 | } |
| 956 | END_CATCH |
| 957 | |
| 958 | return PyUnicode_Decode (stb.c_str (), stb.size (), host_charset (), NULL); |
| 959 | } |
| 960 | |
| 961 | /* Implements gdb.Value.is_optimized_out. */ |
| 962 | static PyObject * |
| 963 | valpy_get_is_optimized_out (PyObject *self, void *closure) |
| 964 | { |
| 965 | struct value *value = ((value_object *) self)->value; |
| 966 | int opt = 0; |
| 967 | |
| 968 | TRY |
| 969 | { |
| 970 | opt = value_optimized_out (value); |
| 971 | } |
| 972 | CATCH (except, RETURN_MASK_ALL) |
| 973 | { |
| 974 | GDB_PY_HANDLE_EXCEPTION (except); |
| 975 | } |
| 976 | END_CATCH |
| 977 | |
| 978 | if (opt) |
| 979 | Py_RETURN_TRUE; |
| 980 | |
| 981 | Py_RETURN_FALSE; |
| 982 | } |
| 983 | |
| 984 | /* Implements gdb.Value.is_lazy. */ |
| 985 | static PyObject * |
| 986 | valpy_get_is_lazy (PyObject *self, void *closure) |
| 987 | { |
| 988 | struct value *value = ((value_object *) self)->value; |
| 989 | int opt = 0; |
| 990 | |
| 991 | TRY |
| 992 | { |
| 993 | opt = value_lazy (value); |
| 994 | } |
| 995 | CATCH (except, RETURN_MASK_ALL) |
| 996 | { |
| 997 | GDB_PY_HANDLE_EXCEPTION (except); |
| 998 | } |
| 999 | END_CATCH |
| 1000 | |
| 1001 | if (opt) |
| 1002 | Py_RETURN_TRUE; |
| 1003 | |
| 1004 | Py_RETURN_FALSE; |
| 1005 | } |
| 1006 | |
| 1007 | /* Implements gdb.Value.fetch_lazy (). */ |
| 1008 | static PyObject * |
| 1009 | valpy_fetch_lazy (PyObject *self, PyObject *args) |
| 1010 | { |
| 1011 | struct value *value = ((value_object *) self)->value; |
| 1012 | |
| 1013 | TRY |
| 1014 | { |
| 1015 | if (value_lazy (value)) |
| 1016 | value_fetch_lazy (value); |
| 1017 | } |
| 1018 | CATCH (except, RETURN_MASK_ALL) |
| 1019 | { |
| 1020 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1021 | } |
| 1022 | END_CATCH |
| 1023 | |
| 1024 | Py_RETURN_NONE; |
| 1025 | } |
| 1026 | |
| 1027 | /* Calculate and return the address of the PyObject as the value of |
| 1028 | the builtin __hash__ call. */ |
| 1029 | static Py_hash_t |
| 1030 | valpy_hash (PyObject *self) |
| 1031 | { |
| 1032 | return (intptr_t) self; |
| 1033 | } |
| 1034 | |
| 1035 | enum valpy_opcode |
| 1036 | { |
| 1037 | VALPY_ADD, |
| 1038 | VALPY_SUB, |
| 1039 | VALPY_MUL, |
| 1040 | VALPY_DIV, |
| 1041 | VALPY_REM, |
| 1042 | VALPY_POW, |
| 1043 | VALPY_LSH, |
| 1044 | VALPY_RSH, |
| 1045 | VALPY_BITAND, |
| 1046 | VALPY_BITOR, |
| 1047 | VALPY_BITXOR |
| 1048 | }; |
| 1049 | |
| 1050 | /* If TYPE is a reference, return the target; otherwise return TYPE. */ |
| 1051 | #define STRIP_REFERENCE(TYPE) \ |
| 1052 | (TYPE_IS_REFERENCE (TYPE) ? (TYPE_TARGET_TYPE (TYPE)) : (TYPE)) |
| 1053 | |
| 1054 | /* Helper for valpy_binop. Returns a value object which is the result |
| 1055 | of applying the operation specified by OPCODE to the given |
| 1056 | arguments. Throws a GDB exception on error. */ |
| 1057 | |
| 1058 | static PyObject * |
| 1059 | valpy_binop_throw (enum valpy_opcode opcode, PyObject *self, PyObject *other) |
| 1060 | { |
| 1061 | PyObject *result = NULL; |
| 1062 | |
| 1063 | struct value *arg1, *arg2; |
| 1064 | struct value *res_val = NULL; |
| 1065 | enum exp_opcode op = OP_NULL; |
| 1066 | int handled = 0; |
| 1067 | |
| 1068 | scoped_value_mark free_values; |
| 1069 | |
| 1070 | /* If the gdb.Value object is the second operand, then it will be |
| 1071 | passed to us as the OTHER argument, and SELF will be an entirely |
| 1072 | different kind of object, altogether. Because of this, we can't |
| 1073 | assume self is a gdb.Value object and need to convert it from |
| 1074 | python as well. */ |
| 1075 | arg1 = convert_value_from_python (self); |
| 1076 | if (arg1 == NULL) |
| 1077 | return NULL; |
| 1078 | |
| 1079 | arg2 = convert_value_from_python (other); |
| 1080 | if (arg2 == NULL) |
| 1081 | return NULL; |
| 1082 | |
| 1083 | switch (opcode) |
| 1084 | { |
| 1085 | case VALPY_ADD: |
| 1086 | { |
| 1087 | struct type *ltype = value_type (arg1); |
| 1088 | struct type *rtype = value_type (arg2); |
| 1089 | |
| 1090 | ltype = check_typedef (ltype); |
| 1091 | ltype = STRIP_REFERENCE (ltype); |
| 1092 | rtype = check_typedef (rtype); |
| 1093 | rtype = STRIP_REFERENCE (rtype); |
| 1094 | |
| 1095 | handled = 1; |
| 1096 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
| 1097 | && is_integral_type (rtype)) |
| 1098 | res_val = value_ptradd (arg1, value_as_long (arg2)); |
| 1099 | else if (TYPE_CODE (rtype) == TYPE_CODE_PTR |
| 1100 | && is_integral_type (ltype)) |
| 1101 | res_val = value_ptradd (arg2, value_as_long (arg1)); |
| 1102 | else |
| 1103 | { |
| 1104 | handled = 0; |
| 1105 | op = BINOP_ADD; |
| 1106 | } |
| 1107 | } |
| 1108 | break; |
| 1109 | case VALPY_SUB: |
| 1110 | { |
| 1111 | struct type *ltype = value_type (arg1); |
| 1112 | struct type *rtype = value_type (arg2); |
| 1113 | |
| 1114 | ltype = check_typedef (ltype); |
| 1115 | ltype = STRIP_REFERENCE (ltype); |
| 1116 | rtype = check_typedef (rtype); |
| 1117 | rtype = STRIP_REFERENCE (rtype); |
| 1118 | |
| 1119 | handled = 1; |
| 1120 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
| 1121 | && TYPE_CODE (rtype) == TYPE_CODE_PTR) |
| 1122 | /* A ptrdiff_t for the target would be preferable here. */ |
| 1123 | res_val = value_from_longest (builtin_type_pyint, |
| 1124 | value_ptrdiff (arg1, arg2)); |
| 1125 | else if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
| 1126 | && is_integral_type (rtype)) |
| 1127 | res_val = value_ptradd (arg1, - value_as_long (arg2)); |
| 1128 | else |
| 1129 | { |
| 1130 | handled = 0; |
| 1131 | op = BINOP_SUB; |
| 1132 | } |
| 1133 | } |
| 1134 | break; |
| 1135 | case VALPY_MUL: |
| 1136 | op = BINOP_MUL; |
| 1137 | break; |
| 1138 | case VALPY_DIV: |
| 1139 | op = BINOP_DIV; |
| 1140 | break; |
| 1141 | case VALPY_REM: |
| 1142 | op = BINOP_REM; |
| 1143 | break; |
| 1144 | case VALPY_POW: |
| 1145 | op = BINOP_EXP; |
| 1146 | break; |
| 1147 | case VALPY_LSH: |
| 1148 | op = BINOP_LSH; |
| 1149 | break; |
| 1150 | case VALPY_RSH: |
| 1151 | op = BINOP_RSH; |
| 1152 | break; |
| 1153 | case VALPY_BITAND: |
| 1154 | op = BINOP_BITWISE_AND; |
| 1155 | break; |
| 1156 | case VALPY_BITOR: |
| 1157 | op = BINOP_BITWISE_IOR; |
| 1158 | break; |
| 1159 | case VALPY_BITXOR: |
| 1160 | op = BINOP_BITWISE_XOR; |
| 1161 | break; |
| 1162 | } |
| 1163 | |
| 1164 | if (!handled) |
| 1165 | { |
| 1166 | if (binop_user_defined_p (op, arg1, arg2)) |
| 1167 | res_val = value_x_binop (arg1, arg2, op, OP_NULL, EVAL_NORMAL); |
| 1168 | else |
| 1169 | res_val = value_binop (arg1, arg2, op); |
| 1170 | } |
| 1171 | |
| 1172 | if (res_val) |
| 1173 | result = value_to_value_object (res_val); |
| 1174 | |
| 1175 | return result; |
| 1176 | } |
| 1177 | |
| 1178 | /* Returns a value object which is the result of applying the operation |
| 1179 | specified by OPCODE to the given arguments. Returns NULL on error, with |
| 1180 | a python exception set. */ |
| 1181 | static PyObject * |
| 1182 | valpy_binop (enum valpy_opcode opcode, PyObject *self, PyObject *other) |
| 1183 | { |
| 1184 | PyObject *result = NULL; |
| 1185 | |
| 1186 | TRY |
| 1187 | { |
| 1188 | result = valpy_binop_throw (opcode, self, other); |
| 1189 | } |
| 1190 | CATCH (except, RETURN_MASK_ALL) |
| 1191 | { |
| 1192 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1193 | } |
| 1194 | END_CATCH |
| 1195 | |
| 1196 | return result; |
| 1197 | } |
| 1198 | |
| 1199 | static PyObject * |
| 1200 | valpy_add (PyObject *self, PyObject *other) |
| 1201 | { |
| 1202 | return valpy_binop (VALPY_ADD, self, other); |
| 1203 | } |
| 1204 | |
| 1205 | static PyObject * |
| 1206 | valpy_subtract (PyObject *self, PyObject *other) |
| 1207 | { |
| 1208 | return valpy_binop (VALPY_SUB, self, other); |
| 1209 | } |
| 1210 | |
| 1211 | static PyObject * |
| 1212 | valpy_multiply (PyObject *self, PyObject *other) |
| 1213 | { |
| 1214 | return valpy_binop (VALPY_MUL, self, other); |
| 1215 | } |
| 1216 | |
| 1217 | static PyObject * |
| 1218 | valpy_divide (PyObject *self, PyObject *other) |
| 1219 | { |
| 1220 | return valpy_binop (VALPY_DIV, self, other); |
| 1221 | } |
| 1222 | |
| 1223 | static PyObject * |
| 1224 | valpy_remainder (PyObject *self, PyObject *other) |
| 1225 | { |
| 1226 | return valpy_binop (VALPY_REM, self, other); |
| 1227 | } |
| 1228 | |
| 1229 | static PyObject * |
| 1230 | valpy_power (PyObject *self, PyObject *other, PyObject *unused) |
| 1231 | { |
| 1232 | /* We don't support the ternary form of pow. I don't know how to express |
| 1233 | that, so let's just throw NotImplementedError to at least do something |
| 1234 | about it. */ |
| 1235 | if (unused != Py_None) |
| 1236 | { |
| 1237 | PyErr_SetString (PyExc_NotImplementedError, |
| 1238 | "Invalid operation on gdb.Value."); |
| 1239 | return NULL; |
| 1240 | } |
| 1241 | |
| 1242 | return valpy_binop (VALPY_POW, self, other); |
| 1243 | } |
| 1244 | |
| 1245 | static PyObject * |
| 1246 | valpy_negative (PyObject *self) |
| 1247 | { |
| 1248 | PyObject *result = NULL; |
| 1249 | |
| 1250 | TRY |
| 1251 | { |
| 1252 | /* Perhaps overkill, but consistency has some virtue. */ |
| 1253 | scoped_value_mark free_values; |
| 1254 | struct value *val; |
| 1255 | |
| 1256 | val = value_neg (((value_object *) self)->value); |
| 1257 | result = value_to_value_object (val); |
| 1258 | } |
| 1259 | CATCH (except, RETURN_MASK_ALL) |
| 1260 | { |
| 1261 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1262 | } |
| 1263 | END_CATCH |
| 1264 | |
| 1265 | return result; |
| 1266 | } |
| 1267 | |
| 1268 | static PyObject * |
| 1269 | valpy_positive (PyObject *self) |
| 1270 | { |
| 1271 | return value_to_value_object (((value_object *) self)->value); |
| 1272 | } |
| 1273 | |
| 1274 | static PyObject * |
| 1275 | valpy_absolute (PyObject *self) |
| 1276 | { |
| 1277 | struct value *value = ((value_object *) self)->value; |
| 1278 | int isabs = 1; |
| 1279 | |
| 1280 | TRY |
| 1281 | { |
| 1282 | scoped_value_mark free_values; |
| 1283 | |
| 1284 | if (value_less (value, value_zero (value_type (value), not_lval))) |
| 1285 | isabs = 0; |
| 1286 | } |
| 1287 | CATCH (except, RETURN_MASK_ALL) |
| 1288 | { |
| 1289 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1290 | } |
| 1291 | END_CATCH |
| 1292 | |
| 1293 | if (isabs) |
| 1294 | return valpy_positive (self); |
| 1295 | else |
| 1296 | return valpy_negative (self); |
| 1297 | } |
| 1298 | |
| 1299 | /* Implements boolean evaluation of gdb.Value. */ |
| 1300 | static int |
| 1301 | valpy_nonzero (PyObject *self) |
| 1302 | { |
| 1303 | struct gdb_exception except = exception_none; |
| 1304 | value_object *self_value = (value_object *) self; |
| 1305 | struct type *type; |
| 1306 | int nonzero = 0; /* Appease GCC warning. */ |
| 1307 | |
| 1308 | TRY |
| 1309 | { |
| 1310 | type = check_typedef (value_type (self_value->value)); |
| 1311 | |
| 1312 | if (is_integral_type (type) || TYPE_CODE (type) == TYPE_CODE_PTR) |
| 1313 | nonzero = !!value_as_long (self_value->value); |
| 1314 | else if (is_floating_value (self_value->value)) |
| 1315 | nonzero = !target_float_is_zero (value_contents (self_value->value), |
| 1316 | type); |
| 1317 | else |
| 1318 | /* All other values are True. */ |
| 1319 | nonzero = 1; |
| 1320 | } |
| 1321 | CATCH (ex, RETURN_MASK_ALL) |
| 1322 | { |
| 1323 | except = ex; |
| 1324 | } |
| 1325 | END_CATCH |
| 1326 | |
| 1327 | /* This is not documented in the Python documentation, but if this |
| 1328 | function fails, return -1 as slot_nb_nonzero does (the default |
| 1329 | Python nonzero function). */ |
| 1330 | GDB_PY_SET_HANDLE_EXCEPTION (except); |
| 1331 | |
| 1332 | return nonzero; |
| 1333 | } |
| 1334 | |
| 1335 | /* Implements ~ for value objects. */ |
| 1336 | static PyObject * |
| 1337 | valpy_invert (PyObject *self) |
| 1338 | { |
| 1339 | struct value *val = NULL; |
| 1340 | |
| 1341 | TRY |
| 1342 | { |
| 1343 | val = value_complement (((value_object *) self)->value); |
| 1344 | } |
| 1345 | CATCH (except, RETURN_MASK_ALL) |
| 1346 | { |
| 1347 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1348 | } |
| 1349 | END_CATCH |
| 1350 | |
| 1351 | return value_to_value_object (val); |
| 1352 | } |
| 1353 | |
| 1354 | /* Implements left shift for value objects. */ |
| 1355 | static PyObject * |
| 1356 | valpy_lsh (PyObject *self, PyObject *other) |
| 1357 | { |
| 1358 | return valpy_binop (VALPY_LSH, self, other); |
| 1359 | } |
| 1360 | |
| 1361 | /* Implements right shift for value objects. */ |
| 1362 | static PyObject * |
| 1363 | valpy_rsh (PyObject *self, PyObject *other) |
| 1364 | { |
| 1365 | return valpy_binop (VALPY_RSH, self, other); |
| 1366 | } |
| 1367 | |
| 1368 | /* Implements bitwise and for value objects. */ |
| 1369 | static PyObject * |
| 1370 | valpy_and (PyObject *self, PyObject *other) |
| 1371 | { |
| 1372 | return valpy_binop (VALPY_BITAND, self, other); |
| 1373 | } |
| 1374 | |
| 1375 | /* Implements bitwise or for value objects. */ |
| 1376 | static PyObject * |
| 1377 | valpy_or (PyObject *self, PyObject *other) |
| 1378 | { |
| 1379 | return valpy_binop (VALPY_BITOR, self, other); |
| 1380 | } |
| 1381 | |
| 1382 | /* Implements bitwise xor for value objects. */ |
| 1383 | static PyObject * |
| 1384 | valpy_xor (PyObject *self, PyObject *other) |
| 1385 | { |
| 1386 | return valpy_binop (VALPY_BITXOR, self, other); |
| 1387 | } |
| 1388 | |
| 1389 | /* Helper for valpy_richcompare. Implements comparison operations for |
| 1390 | value objects. Returns true/false on success. Returns -1 with a |
| 1391 | Python exception set if a Python error is detected. Throws a GDB |
| 1392 | exception on other errors (memory error, etc.). */ |
| 1393 | |
| 1394 | static int |
| 1395 | valpy_richcompare_throw (PyObject *self, PyObject *other, int op) |
| 1396 | { |
| 1397 | int result; |
| 1398 | struct value *value_other; |
| 1399 | struct value *value_self; |
| 1400 | |
| 1401 | scoped_value_mark free_values; |
| 1402 | |
| 1403 | value_other = convert_value_from_python (other); |
| 1404 | if (value_other == NULL) |
| 1405 | return -1; |
| 1406 | |
| 1407 | value_self = ((value_object *) self)->value; |
| 1408 | |
| 1409 | switch (op) |
| 1410 | { |
| 1411 | case Py_LT: |
| 1412 | result = value_less (value_self, value_other); |
| 1413 | break; |
| 1414 | case Py_LE: |
| 1415 | result = value_less (value_self, value_other) |
| 1416 | || value_equal (value_self, value_other); |
| 1417 | break; |
| 1418 | case Py_EQ: |
| 1419 | result = value_equal (value_self, value_other); |
| 1420 | break; |
| 1421 | case Py_NE: |
| 1422 | result = !value_equal (value_self, value_other); |
| 1423 | break; |
| 1424 | case Py_GT: |
| 1425 | result = value_less (value_other, value_self); |
| 1426 | break; |
| 1427 | case Py_GE: |
| 1428 | result = (value_less (value_other, value_self) |
| 1429 | || value_equal (value_self, value_other)); |
| 1430 | break; |
| 1431 | default: |
| 1432 | /* Can't happen. */ |
| 1433 | PyErr_SetString (PyExc_NotImplementedError, |
| 1434 | _("Invalid operation on gdb.Value.")); |
| 1435 | result = -1; |
| 1436 | break; |
| 1437 | } |
| 1438 | |
| 1439 | return result; |
| 1440 | } |
| 1441 | |
| 1442 | |
| 1443 | /* Implements comparison operations for value objects. Returns NULL on error, |
| 1444 | with a python exception set. */ |
| 1445 | static PyObject * |
| 1446 | valpy_richcompare (PyObject *self, PyObject *other, int op) |
| 1447 | { |
| 1448 | int result = 0; |
| 1449 | |
| 1450 | if (other == Py_None) |
| 1451 | /* Comparing with None is special. From what I can tell, in Python |
| 1452 | None is smaller than anything else. */ |
| 1453 | switch (op) { |
| 1454 | case Py_LT: |
| 1455 | case Py_LE: |
| 1456 | case Py_EQ: |
| 1457 | Py_RETURN_FALSE; |
| 1458 | case Py_NE: |
| 1459 | case Py_GT: |
| 1460 | case Py_GE: |
| 1461 | Py_RETURN_TRUE; |
| 1462 | default: |
| 1463 | /* Can't happen. */ |
| 1464 | PyErr_SetString (PyExc_NotImplementedError, |
| 1465 | _("Invalid operation on gdb.Value.")); |
| 1466 | return NULL; |
| 1467 | } |
| 1468 | |
| 1469 | TRY |
| 1470 | { |
| 1471 | result = valpy_richcompare_throw (self, other, op); |
| 1472 | } |
| 1473 | CATCH (except, RETURN_MASK_ALL) |
| 1474 | { |
| 1475 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1476 | } |
| 1477 | END_CATCH |
| 1478 | |
| 1479 | /* In this case, the Python exception has already been set. */ |
| 1480 | if (result < 0) |
| 1481 | return NULL; |
| 1482 | |
| 1483 | if (result == 1) |
| 1484 | Py_RETURN_TRUE; |
| 1485 | |
| 1486 | Py_RETURN_FALSE; |
| 1487 | } |
| 1488 | |
| 1489 | #ifndef IS_PY3K |
| 1490 | /* Implements conversion to int. */ |
| 1491 | static PyObject * |
| 1492 | valpy_int (PyObject *self) |
| 1493 | { |
| 1494 | struct value *value = ((value_object *) self)->value; |
| 1495 | struct type *type = value_type (value); |
| 1496 | LONGEST l = 0; |
| 1497 | |
| 1498 | TRY |
| 1499 | { |
| 1500 | if (is_floating_value (value)) |
| 1501 | { |
| 1502 | type = builtin_type_pylong; |
| 1503 | value = value_cast (type, value); |
| 1504 | } |
| 1505 | |
| 1506 | if (!is_integral_type (type) |
| 1507 | && TYPE_CODE (type) != TYPE_CODE_PTR) |
| 1508 | error (_("Cannot convert value to int.")); |
| 1509 | |
| 1510 | l = value_as_long (value); |
| 1511 | } |
| 1512 | CATCH (except, RETURN_MASK_ALL) |
| 1513 | { |
| 1514 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1515 | } |
| 1516 | END_CATCH |
| 1517 | |
| 1518 | if (TYPE_UNSIGNED (type)) |
| 1519 | return gdb_py_object_from_ulongest (l).release (); |
| 1520 | else |
| 1521 | return gdb_py_object_from_longest (l).release (); |
| 1522 | } |
| 1523 | #endif |
| 1524 | |
| 1525 | /* Implements conversion to long. */ |
| 1526 | static PyObject * |
| 1527 | valpy_long (PyObject *self) |
| 1528 | { |
| 1529 | struct value *value = ((value_object *) self)->value; |
| 1530 | struct type *type = value_type (value); |
| 1531 | LONGEST l = 0; |
| 1532 | |
| 1533 | TRY |
| 1534 | { |
| 1535 | if (is_floating_value (value)) |
| 1536 | { |
| 1537 | type = builtin_type_pylong; |
| 1538 | value = value_cast (type, value); |
| 1539 | } |
| 1540 | |
| 1541 | type = check_typedef (type); |
| 1542 | |
| 1543 | if (!is_integral_type (type) |
| 1544 | && TYPE_CODE (type) != TYPE_CODE_PTR) |
| 1545 | error (_("Cannot convert value to long.")); |
| 1546 | |
| 1547 | l = value_as_long (value); |
| 1548 | } |
| 1549 | CATCH (except, RETURN_MASK_ALL) |
| 1550 | { |
| 1551 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1552 | } |
| 1553 | END_CATCH |
| 1554 | |
| 1555 | if (TYPE_UNSIGNED (type)) |
| 1556 | return gdb_py_long_from_ulongest (l); |
| 1557 | else |
| 1558 | return gdb_py_long_from_longest (l); |
| 1559 | } |
| 1560 | |
| 1561 | /* Implements conversion to float. */ |
| 1562 | static PyObject * |
| 1563 | valpy_float (PyObject *self) |
| 1564 | { |
| 1565 | struct value *value = ((value_object *) self)->value; |
| 1566 | struct type *type = value_type (value); |
| 1567 | double d = 0; |
| 1568 | |
| 1569 | TRY |
| 1570 | { |
| 1571 | type = check_typedef (type); |
| 1572 | |
| 1573 | if (TYPE_CODE (type) == TYPE_CODE_FLT && is_floating_value (value)) |
| 1574 | d = target_float_to_host_double (value_contents (value), type); |
| 1575 | else if (TYPE_CODE (type) == TYPE_CODE_INT) |
| 1576 | { |
| 1577 | /* Note that valpy_long accepts TYPE_CODE_PTR and some |
| 1578 | others here here -- but casting a pointer or bool to a |
| 1579 | float seems wrong. */ |
| 1580 | d = value_as_long (value); |
| 1581 | } |
| 1582 | else |
| 1583 | error (_("Cannot convert value to float.")); |
| 1584 | } |
| 1585 | CATCH (except, RETURN_MASK_ALL) |
| 1586 | { |
| 1587 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1588 | } |
| 1589 | END_CATCH |
| 1590 | |
| 1591 | return PyFloat_FromDouble (d); |
| 1592 | } |
| 1593 | |
| 1594 | /* Returns an object for a value which is released from the all_values chain, |
| 1595 | so its lifetime is not bound to the execution of a command. */ |
| 1596 | PyObject * |
| 1597 | value_to_value_object (struct value *val) |
| 1598 | { |
| 1599 | value_object *val_obj; |
| 1600 | |
| 1601 | val_obj = PyObject_New (value_object, &value_object_type); |
| 1602 | if (val_obj != NULL) |
| 1603 | { |
| 1604 | val_obj->value = release_value (val).release (); |
| 1605 | val_obj->address = NULL; |
| 1606 | val_obj->type = NULL; |
| 1607 | val_obj->dynamic_type = NULL; |
| 1608 | note_value (val_obj); |
| 1609 | } |
| 1610 | |
| 1611 | return (PyObject *) val_obj; |
| 1612 | } |
| 1613 | |
| 1614 | /* Returns a borrowed reference to the struct value corresponding to |
| 1615 | the given value object. */ |
| 1616 | struct value * |
| 1617 | value_object_to_value (PyObject *self) |
| 1618 | { |
| 1619 | value_object *real; |
| 1620 | |
| 1621 | if (! PyObject_TypeCheck (self, &value_object_type)) |
| 1622 | return NULL; |
| 1623 | real = (value_object *) self; |
| 1624 | return real->value; |
| 1625 | } |
| 1626 | |
| 1627 | /* Try to convert a Python value to a gdb value. If the value cannot |
| 1628 | be converted, set a Python exception and return NULL. Returns a |
| 1629 | reference to a new value on the all_values chain. */ |
| 1630 | |
| 1631 | struct value * |
| 1632 | convert_value_from_python (PyObject *obj) |
| 1633 | { |
| 1634 | struct value *value = NULL; /* -Wall */ |
| 1635 | int cmp; |
| 1636 | |
| 1637 | gdb_assert (obj != NULL); |
| 1638 | |
| 1639 | TRY |
| 1640 | { |
| 1641 | if (PyBool_Check (obj)) |
| 1642 | { |
| 1643 | cmp = PyObject_IsTrue (obj); |
| 1644 | if (cmp >= 0) |
| 1645 | value = value_from_longest (builtin_type_pybool, cmp); |
| 1646 | } |
| 1647 | /* Make a long logic check first. In Python 3.x, internally, |
| 1648 | all integers are represented as longs. In Python 2.x, there |
| 1649 | is still a differentiation internally between a PyInt and a |
| 1650 | PyLong. Explicitly do this long check conversion first. In |
| 1651 | GDB, for Python 3.x, we #ifdef PyInt = PyLong. This check has |
| 1652 | to be done first to ensure we do not lose information in the |
| 1653 | conversion process. */ |
| 1654 | else if (PyLong_Check (obj)) |
| 1655 | { |
| 1656 | LONGEST l = PyLong_AsLongLong (obj); |
| 1657 | |
| 1658 | if (PyErr_Occurred ()) |
| 1659 | { |
| 1660 | /* If the error was an overflow, we can try converting to |
| 1661 | ULONGEST instead. */ |
| 1662 | if (PyErr_ExceptionMatches (PyExc_OverflowError)) |
| 1663 | { |
| 1664 | PyObject *etype, *evalue, *etraceback; |
| 1665 | |
| 1666 | PyErr_Fetch (&etype, &evalue, &etraceback); |
| 1667 | gdbpy_ref<> zero (PyInt_FromLong (0)); |
| 1668 | |
| 1669 | /* Check whether obj is positive. */ |
| 1670 | if (PyObject_RichCompareBool (obj, zero.get (), Py_GT) > 0) |
| 1671 | { |
| 1672 | ULONGEST ul; |
| 1673 | |
| 1674 | ul = PyLong_AsUnsignedLongLong (obj); |
| 1675 | if (! PyErr_Occurred ()) |
| 1676 | value = value_from_ulongest (builtin_type_upylong, ul); |
| 1677 | } |
| 1678 | else |
| 1679 | /* There's nothing we can do. */ |
| 1680 | PyErr_Restore (etype, evalue, etraceback); |
| 1681 | } |
| 1682 | } |
| 1683 | else |
| 1684 | value = value_from_longest (builtin_type_pylong, l); |
| 1685 | } |
| 1686 | #if PY_MAJOR_VERSION == 2 |
| 1687 | else if (PyInt_Check (obj)) |
| 1688 | { |
| 1689 | long l = PyInt_AsLong (obj); |
| 1690 | |
| 1691 | if (! PyErr_Occurred ()) |
| 1692 | value = value_from_longest (builtin_type_pyint, l); |
| 1693 | } |
| 1694 | #endif |
| 1695 | else if (PyFloat_Check (obj)) |
| 1696 | { |
| 1697 | double d = PyFloat_AsDouble (obj); |
| 1698 | |
| 1699 | if (! PyErr_Occurred ()) |
| 1700 | { |
| 1701 | value = allocate_value (builtin_type_pyfloat); |
| 1702 | target_float_from_host_double (value_contents_raw (value), |
| 1703 | value_type (value), d); |
| 1704 | } |
| 1705 | } |
| 1706 | else if (gdbpy_is_string (obj)) |
| 1707 | { |
| 1708 | gdb::unique_xmalloc_ptr<char> s |
| 1709 | = python_string_to_target_string (obj); |
| 1710 | if (s != NULL) |
| 1711 | value = value_cstring (s.get (), strlen (s.get ()), |
| 1712 | builtin_type_pychar); |
| 1713 | } |
| 1714 | else if (PyObject_TypeCheck (obj, &value_object_type)) |
| 1715 | value = value_copy (((value_object *) obj)->value); |
| 1716 | else if (gdbpy_is_lazy_string (obj)) |
| 1717 | { |
| 1718 | PyObject *result; |
| 1719 | |
| 1720 | result = PyObject_CallMethodObjArgs (obj, gdbpy_value_cst, NULL); |
| 1721 | value = value_copy (((value_object *) result)->value); |
| 1722 | } |
| 1723 | else |
| 1724 | #ifdef IS_PY3K |
| 1725 | PyErr_Format (PyExc_TypeError, |
| 1726 | _("Could not convert Python object: %S."), obj); |
| 1727 | #else |
| 1728 | PyErr_Format (PyExc_TypeError, |
| 1729 | _("Could not convert Python object: %s."), |
| 1730 | PyString_AsString (PyObject_Str (obj))); |
| 1731 | #endif |
| 1732 | } |
| 1733 | CATCH (except, RETURN_MASK_ALL) |
| 1734 | { |
| 1735 | PyErr_Format (except.reason == RETURN_QUIT |
| 1736 | ? PyExc_KeyboardInterrupt : PyExc_RuntimeError, |
| 1737 | "%s", except.message); |
| 1738 | return NULL; |
| 1739 | } |
| 1740 | END_CATCH |
| 1741 | |
| 1742 | return value; |
| 1743 | } |
| 1744 | |
| 1745 | /* Returns value object in the ARGth position in GDB's history. */ |
| 1746 | PyObject * |
| 1747 | gdbpy_history (PyObject *self, PyObject *args) |
| 1748 | { |
| 1749 | int i; |
| 1750 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ |
| 1751 | |
| 1752 | if (!PyArg_ParseTuple (args, "i", &i)) |
| 1753 | return NULL; |
| 1754 | |
| 1755 | TRY |
| 1756 | { |
| 1757 | res_val = access_value_history (i); |
| 1758 | } |
| 1759 | CATCH (except, RETURN_MASK_ALL) |
| 1760 | { |
| 1761 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1762 | } |
| 1763 | END_CATCH |
| 1764 | |
| 1765 | return value_to_value_object (res_val); |
| 1766 | } |
| 1767 | |
| 1768 | /* Return the value of a convenience variable. */ |
| 1769 | PyObject * |
| 1770 | gdbpy_convenience_variable (PyObject *self, PyObject *args) |
| 1771 | { |
| 1772 | const char *varname; |
| 1773 | struct value *res_val = NULL; |
| 1774 | |
| 1775 | if (!PyArg_ParseTuple (args, "s", &varname)) |
| 1776 | return NULL; |
| 1777 | |
| 1778 | TRY |
| 1779 | { |
| 1780 | struct internalvar *var = lookup_only_internalvar (varname); |
| 1781 | |
| 1782 | if (var != NULL) |
| 1783 | { |
| 1784 | res_val = value_of_internalvar (python_gdbarch, var); |
| 1785 | if (TYPE_CODE (value_type (res_val)) == TYPE_CODE_VOID) |
| 1786 | res_val = NULL; |
| 1787 | } |
| 1788 | } |
| 1789 | CATCH (except, RETURN_MASK_ALL) |
| 1790 | { |
| 1791 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1792 | } |
| 1793 | END_CATCH |
| 1794 | |
| 1795 | if (res_val == NULL) |
| 1796 | Py_RETURN_NONE; |
| 1797 | |
| 1798 | return value_to_value_object (res_val); |
| 1799 | } |
| 1800 | |
| 1801 | /* Set the value of a convenience variable. */ |
| 1802 | PyObject * |
| 1803 | gdbpy_set_convenience_variable (PyObject *self, PyObject *args) |
| 1804 | { |
| 1805 | const char *varname; |
| 1806 | PyObject *value_obj; |
| 1807 | struct value *value = NULL; |
| 1808 | |
| 1809 | if (!PyArg_ParseTuple (args, "sO", &varname, &value_obj)) |
| 1810 | return NULL; |
| 1811 | |
| 1812 | /* None means to clear the variable. */ |
| 1813 | if (value_obj != Py_None) |
| 1814 | { |
| 1815 | value = convert_value_from_python (value_obj); |
| 1816 | if (value == NULL) |
| 1817 | return NULL; |
| 1818 | } |
| 1819 | |
| 1820 | TRY |
| 1821 | { |
| 1822 | if (value == NULL) |
| 1823 | { |
| 1824 | struct internalvar *var = lookup_only_internalvar (varname); |
| 1825 | |
| 1826 | if (var != NULL) |
| 1827 | clear_internalvar (var); |
| 1828 | } |
| 1829 | else |
| 1830 | { |
| 1831 | struct internalvar *var = lookup_internalvar (varname); |
| 1832 | |
| 1833 | set_internalvar (var, value); |
| 1834 | } |
| 1835 | } |
| 1836 | CATCH (except, RETURN_MASK_ALL) |
| 1837 | { |
| 1838 | GDB_PY_HANDLE_EXCEPTION (except); |
| 1839 | } |
| 1840 | END_CATCH |
| 1841 | |
| 1842 | Py_RETURN_NONE; |
| 1843 | } |
| 1844 | |
| 1845 | /* Returns 1 in OBJ is a gdb.Value object, 0 otherwise. */ |
| 1846 | |
| 1847 | int |
| 1848 | gdbpy_is_value_object (PyObject *obj) |
| 1849 | { |
| 1850 | return PyObject_TypeCheck (obj, &value_object_type); |
| 1851 | } |
| 1852 | |
| 1853 | int |
| 1854 | gdbpy_initialize_values (void) |
| 1855 | { |
| 1856 | if (PyType_Ready (&value_object_type) < 0) |
| 1857 | return -1; |
| 1858 | |
| 1859 | return gdb_pymodule_addobject (gdb_module, "Value", |
| 1860 | (PyObject *) &value_object_type); |
| 1861 | } |
| 1862 | |
| 1863 | \f |
| 1864 | |
| 1865 | static gdb_PyGetSetDef value_object_getset[] = { |
| 1866 | { "address", valpy_get_address, NULL, "The address of the value.", |
| 1867 | NULL }, |
| 1868 | { "is_optimized_out", valpy_get_is_optimized_out, NULL, |
| 1869 | "Boolean telling whether the value is optimized " |
| 1870 | "out (i.e., not available).", |
| 1871 | NULL }, |
| 1872 | { "type", valpy_get_type, NULL, "Type of the value.", NULL }, |
| 1873 | { "dynamic_type", valpy_get_dynamic_type, NULL, |
| 1874 | "Dynamic type of the value.", NULL }, |
| 1875 | { "is_lazy", valpy_get_is_lazy, NULL, |
| 1876 | "Boolean telling whether the value is lazy (not fetched yet\n\ |
| 1877 | from the inferior). A lazy value is fetched when needed, or when\n\ |
| 1878 | the \"fetch_lazy()\" method is called.", NULL }, |
| 1879 | {NULL} /* Sentinel */ |
| 1880 | }; |
| 1881 | |
| 1882 | static PyMethodDef value_object_methods[] = { |
| 1883 | { "cast", valpy_cast, METH_VARARGS, "Cast the value to the supplied type." }, |
| 1884 | { "dynamic_cast", valpy_dynamic_cast, METH_VARARGS, |
| 1885 | "dynamic_cast (gdb.Type) -> gdb.Value\n\ |
| 1886 | Cast the value to the supplied type, as if by the C++ dynamic_cast operator." |
| 1887 | }, |
| 1888 | { "reinterpret_cast", valpy_reinterpret_cast, METH_VARARGS, |
| 1889 | "reinterpret_cast (gdb.Type) -> gdb.Value\n\ |
| 1890 | Cast the value to the supplied type, as if by the C++\n\ |
| 1891 | reinterpret_cast operator." |
| 1892 | }, |
| 1893 | { "dereference", valpy_dereference, METH_NOARGS, "Dereferences the value." }, |
| 1894 | { "referenced_value", valpy_referenced_value, METH_NOARGS, |
| 1895 | "Return the value referenced by a TYPE_CODE_REF or TYPE_CODE_PTR value." }, |
| 1896 | { "reference_value", valpy_lvalue_reference_value, METH_NOARGS, |
| 1897 | "Return a value of type TYPE_CODE_REF referencing this value." }, |
| 1898 | { "rvalue_reference_value", valpy_rvalue_reference_value, METH_NOARGS, |
| 1899 | "Return a value of type TYPE_CODE_RVALUE_REF referencing this value." }, |
| 1900 | { "const_value", valpy_const_value, METH_NOARGS, |
| 1901 | "Return a 'const' qualied version of the same value." }, |
| 1902 | { "lazy_string", (PyCFunction) valpy_lazy_string, |
| 1903 | METH_VARARGS | METH_KEYWORDS, |
| 1904 | "lazy_string ([encoding] [, length]) -> lazy_string\n\ |
| 1905 | Return a lazy string representation of the value." }, |
| 1906 | { "string", (PyCFunction) valpy_string, METH_VARARGS | METH_KEYWORDS, |
| 1907 | "string ([encoding] [, errors] [, length]) -> string\n\ |
| 1908 | Return Unicode string representation of the value." }, |
| 1909 | { "fetch_lazy", valpy_fetch_lazy, METH_NOARGS, |
| 1910 | "Fetches the value from the inferior, if it was lazy." }, |
| 1911 | {NULL} /* Sentinel */ |
| 1912 | }; |
| 1913 | |
| 1914 | static PyNumberMethods value_object_as_number = { |
| 1915 | valpy_add, |
| 1916 | valpy_subtract, |
| 1917 | valpy_multiply, |
| 1918 | #ifndef IS_PY3K |
| 1919 | valpy_divide, |
| 1920 | #endif |
| 1921 | valpy_remainder, |
| 1922 | NULL, /* nb_divmod */ |
| 1923 | valpy_power, /* nb_power */ |
| 1924 | valpy_negative, /* nb_negative */ |
| 1925 | valpy_positive, /* nb_positive */ |
| 1926 | valpy_absolute, /* nb_absolute */ |
| 1927 | valpy_nonzero, /* nb_nonzero */ |
| 1928 | valpy_invert, /* nb_invert */ |
| 1929 | valpy_lsh, /* nb_lshift */ |
| 1930 | valpy_rsh, /* nb_rshift */ |
| 1931 | valpy_and, /* nb_and */ |
| 1932 | valpy_xor, /* nb_xor */ |
| 1933 | valpy_or, /* nb_or */ |
| 1934 | #ifdef IS_PY3K |
| 1935 | valpy_long, /* nb_int */ |
| 1936 | NULL, /* reserved */ |
| 1937 | #else |
| 1938 | NULL, /* nb_coerce */ |
| 1939 | valpy_int, /* nb_int */ |
| 1940 | valpy_long, /* nb_long */ |
| 1941 | #endif |
| 1942 | valpy_float, /* nb_float */ |
| 1943 | #ifndef IS_PY3K |
| 1944 | NULL, /* nb_oct */ |
| 1945 | NULL, /* nb_hex */ |
| 1946 | #endif |
| 1947 | NULL, /* nb_inplace_add */ |
| 1948 | NULL, /* nb_inplace_subtract */ |
| 1949 | NULL, /* nb_inplace_multiply */ |
| 1950 | #ifndef IS_PY3K |
| 1951 | NULL, /* nb_inplace_divide */ |
| 1952 | #endif |
| 1953 | NULL, /* nb_inplace_remainder */ |
| 1954 | NULL, /* nb_inplace_power */ |
| 1955 | NULL, /* nb_inplace_lshift */ |
| 1956 | NULL, /* nb_inplace_rshift */ |
| 1957 | NULL, /* nb_inplace_and */ |
| 1958 | NULL, /* nb_inplace_xor */ |
| 1959 | NULL, /* nb_inplace_or */ |
| 1960 | NULL, /* nb_floor_divide */ |
| 1961 | valpy_divide, /* nb_true_divide */ |
| 1962 | NULL, /* nb_inplace_floor_divide */ |
| 1963 | NULL, /* nb_inplace_true_divide */ |
| 1964 | #ifndef HAVE_LIBPYTHON2_4 |
| 1965 | /* This was added in Python 2.5. */ |
| 1966 | valpy_long, /* nb_index */ |
| 1967 | #endif /* HAVE_LIBPYTHON2_4 */ |
| 1968 | }; |
| 1969 | |
| 1970 | static PyMappingMethods value_object_as_mapping = { |
| 1971 | valpy_length, |
| 1972 | valpy_getitem, |
| 1973 | valpy_setitem |
| 1974 | }; |
| 1975 | |
| 1976 | PyTypeObject value_object_type = { |
| 1977 | PyVarObject_HEAD_INIT (NULL, 0) |
| 1978 | "gdb.Value", /*tp_name*/ |
| 1979 | sizeof (value_object), /*tp_basicsize*/ |
| 1980 | 0, /*tp_itemsize*/ |
| 1981 | valpy_dealloc, /*tp_dealloc*/ |
| 1982 | 0, /*tp_print*/ |
| 1983 | 0, /*tp_getattr*/ |
| 1984 | 0, /*tp_setattr*/ |
| 1985 | 0, /*tp_compare*/ |
| 1986 | 0, /*tp_repr*/ |
| 1987 | &value_object_as_number, /*tp_as_number*/ |
| 1988 | 0, /*tp_as_sequence*/ |
| 1989 | &value_object_as_mapping, /*tp_as_mapping*/ |
| 1990 | valpy_hash, /*tp_hash*/ |
| 1991 | valpy_call, /*tp_call*/ |
| 1992 | valpy_str, /*tp_str*/ |
| 1993 | 0, /*tp_getattro*/ |
| 1994 | 0, /*tp_setattro*/ |
| 1995 | 0, /*tp_as_buffer*/ |
| 1996 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
| 1997 | | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
| 1998 | "GDB value object", /* tp_doc */ |
| 1999 | 0, /* tp_traverse */ |
| 2000 | 0, /* tp_clear */ |
| 2001 | valpy_richcompare, /* tp_richcompare */ |
| 2002 | 0, /* tp_weaklistoffset */ |
| 2003 | 0, /* tp_iter */ |
| 2004 | 0, /* tp_iternext */ |
| 2005 | value_object_methods, /* tp_methods */ |
| 2006 | 0, /* tp_members */ |
| 2007 | value_object_getset, /* tp_getset */ |
| 2008 | 0, /* tp_base */ |
| 2009 | 0, /* tp_dict */ |
| 2010 | 0, /* tp_descr_get */ |
| 2011 | 0, /* tp_descr_set */ |
| 2012 | 0, /* tp_dictoffset */ |
| 2013 | 0, /* tp_init */ |
| 2014 | 0, /* tp_alloc */ |
| 2015 | valpy_new /* tp_new */ |
| 2016 | }; |