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7843261b TJB |
1 | /* Python interface to values. |
2 | ||
4c38e0a4 | 3 | Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. |
7843261b TJB |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
08c637de | 21 | #include "gdb_assert.h" |
7843261b TJB |
22 | #include "charset.h" |
23 | #include "value.h" | |
24 | #include "exceptions.h" | |
25 | #include "language.h" | |
26 | #include "dfp.h" | |
79a45b7d | 27 | #include "valprint.h" |
5374244e | 28 | #include "infcall.h" |
f9ffd4bb | 29 | #include "expression.h" |
7843261b | 30 | |
7843261b TJB |
31 | #ifdef HAVE_PYTHON |
32 | ||
33 | #include "python-internal.h" | |
34 | ||
35 | /* Even though Python scalar types directly map to host types, we use | |
36 | target types here to remain consistent with the the values system in | |
37 | GDB (which uses target arithmetic). */ | |
38 | ||
39 | /* Python's integer type corresponds to C's long type. */ | |
d452c4bc | 40 | #define builtin_type_pyint builtin_type (python_gdbarch)->builtin_long |
7843261b TJB |
41 | |
42 | /* Python's float type corresponds to C's double type. */ | |
d452c4bc | 43 | #define builtin_type_pyfloat builtin_type (python_gdbarch)->builtin_double |
7843261b TJB |
44 | |
45 | /* Python's long type corresponds to C's long long type. */ | |
d452c4bc | 46 | #define builtin_type_pylong builtin_type (python_gdbarch)->builtin_long_long |
7843261b | 47 | |
595939de PM |
48 | /* Python's long type corresponds to C's long long type. Unsigned version. */ |
49 | #define builtin_type_upylong builtin_type \ | |
50 | (python_gdbarch)->builtin_unsigned_long_long | |
51 | ||
7843261b | 52 | #define builtin_type_pybool \ |
d452c4bc | 53 | language_bool_type (python_language, python_gdbarch) |
7843261b | 54 | |
3b7538c0 | 55 | #define builtin_type_pychar \ |
d452c4bc | 56 | language_string_char_type (python_language, python_gdbarch) |
3b7538c0 | 57 | |
4e7a5ef5 | 58 | typedef struct value_object { |
7843261b | 59 | PyObject_HEAD |
4e7a5ef5 TT |
60 | struct value_object *next; |
61 | struct value_object *prev; | |
7843261b | 62 | struct value *value; |
c0c6f777 | 63 | PyObject *address; |
2c74e833 | 64 | PyObject *type; |
7843261b TJB |
65 | } value_object; |
66 | ||
4e7a5ef5 TT |
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 | ||
7843261b TJB |
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 | ||
4e7a5ef5 TT |
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; | |
7843261b | 90 | |
77316f4c | 91 | value_free (self->value); |
c0c6f777 TJB |
92 | |
93 | if (self->address) | |
94 | /* Use braces to appease gcc warning. *sigh* */ | |
95 | { | |
96 | Py_DECREF (self->address); | |
97 | } | |
98 | ||
2c74e833 TT |
99 | if (self->type) |
100 | { | |
101 | Py_DECREF (self->type); | |
102 | } | |
103 | ||
7843261b TJB |
104 | self->ob_type->tp_free (self); |
105 | } | |
106 | ||
4e7a5ef5 TT |
107 | /* Helper to push a Value object on the global list. */ |
108 | static void | |
109 | note_value (value_object *value_obj) | |
110 | { | |
111 | value_obj->next = values_in_python; | |
112 | if (value_obj->next) | |
113 | value_obj->next->prev = value_obj; | |
114 | value_obj->prev = NULL; | |
115 | values_in_python = value_obj; | |
116 | } | |
117 | ||
7843261b TJB |
118 | /* Called when a new gdb.Value object needs to be allocated. */ |
119 | static PyObject * | |
120 | valpy_new (PyTypeObject *subtype, PyObject *args, PyObject *keywords) | |
121 | { | |
122 | struct value *value = NULL; /* Initialize to appease gcc warning. */ | |
123 | value_object *value_obj; | |
7843261b TJB |
124 | |
125 | if (PyTuple_Size (args) != 1) | |
126 | { | |
127 | PyErr_SetString (PyExc_TypeError, _("Value object creation takes only " | |
128 | "1 argument")); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | value_obj = (value_object *) subtype->tp_alloc (subtype, 1); | |
133 | if (value_obj == NULL) | |
134 | { | |
135 | PyErr_SetString (PyExc_MemoryError, _("Could not allocate memory to " | |
136 | "create Value object.")); | |
137 | return NULL; | |
138 | } | |
139 | ||
08c637de TJB |
140 | value = convert_value_from_python (PyTuple_GetItem (args, 0)); |
141 | if (value == NULL) | |
7843261b TJB |
142 | { |
143 | subtype->tp_free (value_obj); | |
08c637de | 144 | return NULL; |
7843261b TJB |
145 | } |
146 | ||
147 | value_obj->value = value; | |
4e7a5ef5 | 148 | value_incref (value); |
c0c6f777 | 149 | value_obj->address = NULL; |
2c74e833 | 150 | value_obj->type = NULL; |
4e7a5ef5 | 151 | note_value (value_obj); |
7843261b TJB |
152 | |
153 | return (PyObject *) value_obj; | |
154 | } | |
155 | ||
4e7a5ef5 TT |
156 | /* Iterate over all the Value objects, calling preserve_one_value on |
157 | each. */ | |
158 | void | |
159 | preserve_python_values (struct objfile *objfile, htab_t copied_types) | |
160 | { | |
161 | value_object *iter; | |
162 | ||
163 | for (iter = values_in_python; iter; iter = iter->next) | |
164 | preserve_one_value (iter->value, objfile, copied_types); | |
165 | } | |
166 | ||
7843261b TJB |
167 | /* Given a value of a pointer type, apply the C unary * operator to it. */ |
168 | static PyObject * | |
169 | valpy_dereference (PyObject *self, PyObject *args) | |
170 | { | |
171 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
172 | volatile struct gdb_exception except; | |
173 | ||
174 | TRY_CATCH (except, RETURN_MASK_ALL) | |
175 | { | |
176 | res_val = value_ind (((value_object *) self)->value); | |
177 | } | |
178 | GDB_PY_HANDLE_EXCEPTION (except); | |
179 | ||
180 | return value_to_value_object (res_val); | |
181 | } | |
182 | ||
08c637de TJB |
183 | /* Return "&value". */ |
184 | static PyObject * | |
c0c6f777 | 185 | valpy_get_address (PyObject *self, void *closure) |
08c637de TJB |
186 | { |
187 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
c0c6f777 | 188 | value_object *val_obj = (value_object *) self; |
08c637de TJB |
189 | volatile struct gdb_exception except; |
190 | ||
c0c6f777 | 191 | if (!val_obj->address) |
08c637de | 192 | { |
c0c6f777 TJB |
193 | TRY_CATCH (except, RETURN_MASK_ALL) |
194 | { | |
195 | res_val = value_addr (val_obj->value); | |
196 | } | |
197 | if (except.reason < 0) | |
198 | { | |
199 | val_obj->address = Py_None; | |
200 | Py_INCREF (Py_None); | |
201 | } | |
202 | else | |
203 | val_obj->address = value_to_value_object (res_val); | |
08c637de | 204 | } |
08c637de | 205 | |
c0c6f777 TJB |
206 | Py_INCREF (val_obj->address); |
207 | ||
208 | return val_obj->address; | |
08c637de TJB |
209 | } |
210 | ||
2c74e833 TT |
211 | /* Return type of the value. */ |
212 | static PyObject * | |
213 | valpy_get_type (PyObject *self, void *closure) | |
214 | { | |
215 | value_object *obj = (value_object *) self; | |
d59b6f6c | 216 | |
2c74e833 TT |
217 | if (!obj->type) |
218 | { | |
219 | obj->type = type_to_type_object (value_type (obj->value)); | |
220 | if (!obj->type) | |
221 | { | |
222 | obj->type = Py_None; | |
223 | Py_INCREF (obj->type); | |
224 | } | |
225 | } | |
226 | Py_INCREF (obj->type); | |
227 | return obj->type; | |
228 | } | |
229 | ||
be759fcf PM |
230 | /* Implementation of gdb.Value.lazy_string ([encoding] [, length]) -> |
231 | string. Return a PyObject representing a lazy_string_object type. | |
232 | A lazy string is a pointer to a string with an optional encoding and | |
233 | length. If ENCODING is not given, encoding is set to None. If an | |
234 | ENCODING is provided the encoding parameter is set to ENCODING, but | |
235 | the string is not encoded. If LENGTH is provided then the length | |
236 | parameter is set to LENGTH, otherwise length will be set to -1 (first | |
237 | null of appropriate with). */ | |
238 | static PyObject * | |
239 | valpy_lazy_string (PyObject *self, PyObject *args, PyObject *kw) | |
240 | { | |
241 | int length = -1; | |
242 | struct value *value = ((value_object *) self)->value; | |
243 | const char *user_encoding = NULL; | |
244 | static char *keywords[] = { "encoding", "length", NULL }; | |
245 | PyObject *str_obj; | |
246 | ||
247 | if (!PyArg_ParseTupleAndKeywords (args, kw, "|si", keywords, | |
248 | &user_encoding, &length)) | |
249 | return NULL; | |
250 | ||
251 | if (TYPE_CODE (value_type (value)) == TYPE_CODE_PTR) | |
252 | value = value_ind (value); | |
253 | ||
254 | str_obj = gdbpy_create_lazy_string_object (value_address (value), length, | |
255 | user_encoding, value_type (value)); | |
256 | ||
257 | return (PyObject *) str_obj; | |
258 | } | |
259 | ||
fbb8f299 PM |
260 | /* Implementation of gdb.Value.string ([encoding] [, errors] |
261 | [, length]) -> string. Return Unicode string with value contents. | |
262 | If ENCODING is not given, the string is assumed to be encoded in | |
263 | the target's charset. If LENGTH is provided, only fetch string to | |
264 | the length provided. */ | |
265 | ||
b6cb8e7d | 266 | static PyObject * |
cc924cad | 267 | valpy_string (PyObject *self, PyObject *args, PyObject *kw) |
b6cb8e7d | 268 | { |
f92adf3c | 269 | int length = -1; |
b6cb8e7d TJB |
270 | gdb_byte *buffer; |
271 | struct value *value = ((value_object *) self)->value; | |
272 | volatile struct gdb_exception except; | |
273 | PyObject *unicode; | |
274 | const char *encoding = NULL; | |
275 | const char *errors = NULL; | |
276 | const char *user_encoding = NULL; | |
277 | const char *la_encoding = NULL; | |
96c07c5b | 278 | struct type *char_type; |
31158f0e | 279 | static char *keywords[] = { "encoding", "errors", "length", NULL }; |
b6cb8e7d | 280 | |
fbb8f299 PM |
281 | if (!PyArg_ParseTupleAndKeywords (args, kw, "|ssi", keywords, |
282 | &user_encoding, &errors, &length)) | |
b6cb8e7d TJB |
283 | return NULL; |
284 | ||
285 | TRY_CATCH (except, RETURN_MASK_ALL) | |
286 | { | |
96c07c5b | 287 | LA_GET_STRING (value, &buffer, &length, &char_type, &la_encoding); |
b6cb8e7d TJB |
288 | } |
289 | GDB_PY_HANDLE_EXCEPTION (except); | |
290 | ||
291 | encoding = (user_encoding && *user_encoding) ? user_encoding : la_encoding; | |
96c07c5b TT |
292 | unicode = PyUnicode_Decode (buffer, length * TYPE_LENGTH (char_type), |
293 | encoding, errors); | |
b6cb8e7d TJB |
294 | xfree (buffer); |
295 | ||
296 | return unicode; | |
297 | } | |
298 | ||
f9ffd4bb TT |
299 | /* A helper function that implements the various cast operators. */ |
300 | ||
2c74e833 | 301 | static PyObject * |
f9ffd4bb | 302 | valpy_do_cast (PyObject *self, PyObject *args, enum exp_opcode op) |
2c74e833 TT |
303 | { |
304 | PyObject *type_obj; | |
305 | struct type *type; | |
306 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
307 | volatile struct gdb_exception except; | |
308 | ||
309 | if (! PyArg_ParseTuple (args, "O", &type_obj)) | |
310 | return NULL; | |
311 | ||
312 | type = type_object_to_type (type_obj); | |
313 | if (! type) | |
314 | { | |
044c0f87 PM |
315 | PyErr_SetString (PyExc_RuntimeError, |
316 | _("Argument must be a type.")); | |
2c74e833 TT |
317 | return NULL; |
318 | } | |
319 | ||
320 | TRY_CATCH (except, RETURN_MASK_ALL) | |
321 | { | |
f9ffd4bb TT |
322 | struct value *val = ((value_object *) self)->value; |
323 | ||
324 | if (op == UNOP_DYNAMIC_CAST) | |
325 | res_val = value_dynamic_cast (type, val); | |
326 | else if (op == UNOP_REINTERPRET_CAST) | |
327 | res_val = value_reinterpret_cast (type, val); | |
328 | else | |
329 | { | |
330 | gdb_assert (op == UNOP_CAST); | |
331 | res_val = value_cast (type, val); | |
332 | } | |
2c74e833 TT |
333 | } |
334 | GDB_PY_HANDLE_EXCEPTION (except); | |
335 | ||
336 | return value_to_value_object (res_val); | |
337 | } | |
338 | ||
f9ffd4bb TT |
339 | /* Implementation of the "cast" method. */ |
340 | ||
341 | static PyObject * | |
342 | valpy_cast (PyObject *self, PyObject *args) | |
343 | { | |
344 | return valpy_do_cast (self, args, UNOP_CAST); | |
345 | } | |
346 | ||
347 | /* Implementation of the "dynamic_cast" method. */ | |
348 | ||
349 | static PyObject * | |
350 | valpy_dynamic_cast (PyObject *self, PyObject *args) | |
351 | { | |
352 | return valpy_do_cast (self, args, UNOP_DYNAMIC_CAST); | |
353 | } | |
354 | ||
355 | /* Implementation of the "reinterpret_cast" method. */ | |
356 | ||
357 | static PyObject * | |
358 | valpy_reinterpret_cast (PyObject *self, PyObject *args) | |
359 | { | |
360 | return valpy_do_cast (self, args, UNOP_REINTERPRET_CAST); | |
361 | } | |
362 | ||
7843261b TJB |
363 | static Py_ssize_t |
364 | valpy_length (PyObject *self) | |
365 | { | |
366 | /* We don't support getting the number of elements in a struct / class. */ | |
367 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 368 | _("Invalid operation on gdb.Value.")); |
7843261b TJB |
369 | return -1; |
370 | } | |
371 | ||
372 | /* Given string name of an element inside structure, return its value | |
373 | object. */ | |
374 | static PyObject * | |
375 | valpy_getitem (PyObject *self, PyObject *key) | |
376 | { | |
377 | value_object *self_value = (value_object *) self; | |
08c637de | 378 | char *field = NULL; |
570e2b1a | 379 | struct value *res_val = NULL; |
7843261b TJB |
380 | volatile struct gdb_exception except; |
381 | ||
08c637de TJB |
382 | if (gdbpy_is_string (key)) |
383 | { | |
384 | field = python_string_to_host_string (key); | |
385 | if (field == NULL) | |
386 | return NULL; | |
387 | } | |
7843261b TJB |
388 | |
389 | TRY_CATCH (except, RETURN_MASK_ALL) | |
390 | { | |
3c0ed299 | 391 | struct value *tmp = self_value->value; |
08c637de TJB |
392 | |
393 | if (field) | |
394 | res_val = value_struct_elt (&tmp, NULL, field, 0, NULL); | |
395 | else | |
396 | { | |
397 | /* Assume we are attempting an array access, and let the | |
398 | value code throw an exception if the index has an invalid | |
399 | type. */ | |
400 | struct value *idx = convert_value_from_python (key); | |
d59b6f6c | 401 | |
570e2b1a | 402 | if (idx != NULL) |
2e4d963f PM |
403 | { |
404 | /* Check the value's type is something that can be accessed via | |
405 | a subscript. */ | |
406 | struct type *type; | |
d59b6f6c | 407 | |
2e4d963f PM |
408 | tmp = coerce_ref (tmp); |
409 | type = check_typedef (value_type (tmp)); | |
410 | if (TYPE_CODE (type) != TYPE_CODE_ARRAY | |
411 | && TYPE_CODE (type) != TYPE_CODE_PTR) | |
044c0f87 | 412 | error( _("Cannot subscript requested type.")); |
2e4d963f PM |
413 | else |
414 | res_val = value_subscript (tmp, value_as_long (idx)); | |
415 | } | |
08c637de | 416 | } |
7843261b | 417 | } |
570e2b1a | 418 | |
06878dd2 | 419 | xfree (field); |
7843261b TJB |
420 | GDB_PY_HANDLE_EXCEPTION (except); |
421 | ||
06878dd2 | 422 | return res_val ? value_to_value_object (res_val) : NULL; |
7843261b TJB |
423 | } |
424 | ||
425 | static int | |
426 | valpy_setitem (PyObject *self, PyObject *key, PyObject *value) | |
427 | { | |
428 | PyErr_Format (PyExc_NotImplementedError, | |
429 | _("Setting of struct elements is not currently supported.")); | |
430 | return -1; | |
431 | } | |
432 | ||
5374244e PM |
433 | /* Called by the Python interpreter to perform an inferior function |
434 | call on the value. */ | |
435 | static PyObject * | |
436 | valpy_call (PyObject *self, PyObject *args, PyObject *keywords) | |
437 | { | |
438 | struct value *return_value = NULL; | |
439 | Py_ssize_t args_count; | |
440 | volatile struct gdb_exception except; | |
441 | struct value *function = ((value_object *) self)->value; | |
442 | struct value **vargs = NULL; | |
443 | struct type *ftype = check_typedef (value_type (function)); | |
444 | ||
445 | if (TYPE_CODE (ftype) != TYPE_CODE_FUNC) | |
446 | { | |
447 | PyErr_SetString (PyExc_RuntimeError, | |
448 | _("Value is not callable (not TYPE_CODE_FUNC).")); | |
449 | return NULL; | |
450 | } | |
451 | ||
452 | args_count = PyTuple_Size (args); | |
453 | if (args_count > 0) | |
454 | { | |
455 | int i; | |
456 | ||
457 | vargs = alloca (sizeof (struct value *) * args_count); | |
458 | for (i = 0; i < args_count; i++) | |
459 | { | |
460 | PyObject *item = PyTuple_GetItem (args, i); | |
461 | ||
462 | if (item == NULL) | |
463 | return NULL; | |
464 | ||
465 | vargs[i] = convert_value_from_python (item); | |
466 | if (vargs[i] == NULL) | |
467 | return NULL; | |
468 | } | |
469 | } | |
470 | ||
471 | TRY_CATCH (except, RETURN_MASK_ALL) | |
472 | { | |
473 | return_value = call_function_by_hand (function, args_count, vargs); | |
474 | } | |
475 | GDB_PY_HANDLE_EXCEPTION (except); | |
476 | ||
477 | return value_to_value_object (return_value); | |
478 | } | |
479 | ||
7843261b TJB |
480 | /* Called by the Python interpreter to obtain string representation |
481 | of the object. */ | |
482 | static PyObject * | |
483 | valpy_str (PyObject *self) | |
484 | { | |
485 | char *s = NULL; | |
7843261b TJB |
486 | struct ui_file *stb; |
487 | struct cleanup *old_chain; | |
488 | PyObject *result; | |
79a45b7d | 489 | struct value_print_options opts; |
7843261b TJB |
490 | volatile struct gdb_exception except; |
491 | ||
79a45b7d TT |
492 | get_user_print_options (&opts); |
493 | opts.deref_ref = 0; | |
494 | ||
7843261b TJB |
495 | stb = mem_fileopen (); |
496 | old_chain = make_cleanup_ui_file_delete (stb); | |
497 | ||
498 | TRY_CATCH (except, RETURN_MASK_ALL) | |
499 | { | |
79a45b7d | 500 | common_val_print (((value_object *) self)->value, stb, 0, |
d452c4bc | 501 | &opts, python_language); |
759ef836 | 502 | s = ui_file_xstrdup (stb, NULL); |
7843261b TJB |
503 | } |
504 | GDB_PY_HANDLE_EXCEPTION (except); | |
505 | ||
506 | do_cleanups (old_chain); | |
507 | ||
508 | result = PyUnicode_Decode (s, strlen (s), host_charset (), NULL); | |
509 | xfree (s); | |
510 | ||
511 | return result; | |
512 | } | |
513 | ||
def2b000 TJB |
514 | /* Implements gdb.Value.is_optimized_out. */ |
515 | static PyObject * | |
516 | valpy_get_is_optimized_out (PyObject *self, void *closure) | |
517 | { | |
518 | struct value *value = ((value_object *) self)->value; | |
519 | ||
520 | if (value_optimized_out (value)) | |
521 | Py_RETURN_TRUE; | |
522 | ||
523 | Py_RETURN_FALSE; | |
524 | } | |
525 | ||
88d4aea7 PM |
526 | /* Calculate and return the address of the PyObject as the value of |
527 | the builtin __hash__ call. */ | |
528 | static long | |
529 | valpy_hash (PyObject *self) | |
530 | { | |
531 | return (long) (intptr_t) self; | |
532 | } | |
533 | ||
7843261b TJB |
534 | enum valpy_opcode |
535 | { | |
536 | VALPY_ADD, | |
537 | VALPY_SUB, | |
538 | VALPY_MUL, | |
539 | VALPY_DIV, | |
540 | VALPY_REM, | |
08c637de TJB |
541 | VALPY_POW, |
542 | VALPY_LSH, | |
543 | VALPY_RSH, | |
544 | VALPY_BITAND, | |
545 | VALPY_BITOR, | |
546 | VALPY_BITXOR | |
7843261b TJB |
547 | }; |
548 | ||
549 | /* If TYPE is a reference, return the target; otherwise return TYPE. */ | |
550 | #define STRIP_REFERENCE(TYPE) \ | |
551 | ((TYPE_CODE (TYPE) == TYPE_CODE_REF) ? (TYPE_TARGET_TYPE (TYPE)) : (TYPE)) | |
552 | ||
553 | /* Returns a value object which is the result of applying the operation | |
554 | specified by OPCODE to the given arguments. */ | |
555 | static PyObject * | |
556 | valpy_binop (enum valpy_opcode opcode, PyObject *self, PyObject *other) | |
557 | { | |
558 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
559 | volatile struct gdb_exception except; | |
560 | ||
561 | TRY_CATCH (except, RETURN_MASK_ALL) | |
562 | { | |
563 | struct value *arg1, *arg2; | |
564 | ||
565 | /* If the gdb.Value object is the second operand, then it will be passed | |
566 | to us as the OTHER argument, and SELF will be an entirely different | |
567 | kind of object, altogether. Because of this, we can't assume self is | |
568 | a gdb.Value object and need to convert it from python as well. */ | |
569 | arg1 = convert_value_from_python (self); | |
08c637de | 570 | if (arg1 == NULL) |
cc924cad | 571 | break; |
08c637de | 572 | |
7843261b | 573 | arg2 = convert_value_from_python (other); |
08c637de | 574 | if (arg2 == NULL) |
cc924cad | 575 | break; |
7843261b TJB |
576 | |
577 | switch (opcode) | |
578 | { | |
579 | case VALPY_ADD: | |
580 | { | |
581 | struct type *ltype = value_type (arg1); | |
582 | struct type *rtype = value_type (arg2); | |
583 | ||
584 | CHECK_TYPEDEF (ltype); | |
585 | ltype = STRIP_REFERENCE (ltype); | |
586 | CHECK_TYPEDEF (rtype); | |
587 | rtype = STRIP_REFERENCE (rtype); | |
588 | ||
2497b498 UW |
589 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
590 | && is_integral_type (rtype)) | |
591 | res_val = value_ptradd (arg1, value_as_long (arg2)); | |
592 | else if (TYPE_CODE (rtype) == TYPE_CODE_PTR | |
593 | && is_integral_type (ltype)) | |
594 | res_val = value_ptradd (arg2, value_as_long (arg1)); | |
7843261b TJB |
595 | else |
596 | res_val = value_binop (arg1, arg2, BINOP_ADD); | |
597 | } | |
598 | break; | |
599 | case VALPY_SUB: | |
600 | { | |
601 | struct type *ltype = value_type (arg1); | |
602 | struct type *rtype = value_type (arg2); | |
603 | ||
604 | CHECK_TYPEDEF (ltype); | |
605 | ltype = STRIP_REFERENCE (ltype); | |
606 | CHECK_TYPEDEF (rtype); | |
607 | rtype = STRIP_REFERENCE (rtype); | |
608 | ||
2497b498 UW |
609 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
610 | && TYPE_CODE (rtype) == TYPE_CODE_PTR) | |
611 | /* A ptrdiff_t for the target would be preferable here. */ | |
612 | res_val = value_from_longest (builtin_type_pyint, | |
613 | value_ptrdiff (arg1, arg2)); | |
614 | else if (TYPE_CODE (ltype) == TYPE_CODE_PTR | |
615 | && is_integral_type (rtype)) | |
616 | res_val = value_ptradd (arg1, - value_as_long (arg2)); | |
7843261b TJB |
617 | else |
618 | res_val = value_binop (arg1, arg2, BINOP_SUB); | |
619 | } | |
620 | break; | |
621 | case VALPY_MUL: | |
622 | res_val = value_binop (arg1, arg2, BINOP_MUL); | |
623 | break; | |
624 | case VALPY_DIV: | |
625 | res_val = value_binop (arg1, arg2, BINOP_DIV); | |
626 | break; | |
627 | case VALPY_REM: | |
628 | res_val = value_binop (arg1, arg2, BINOP_REM); | |
629 | break; | |
630 | case VALPY_POW: | |
631 | res_val = value_binop (arg1, arg2, BINOP_EXP); | |
632 | break; | |
08c637de TJB |
633 | case VALPY_LSH: |
634 | res_val = value_binop (arg1, arg2, BINOP_LSH); | |
635 | break; | |
636 | case VALPY_RSH: | |
637 | res_val = value_binop (arg1, arg2, BINOP_RSH); | |
638 | break; | |
639 | case VALPY_BITAND: | |
640 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_AND); | |
641 | break; | |
642 | case VALPY_BITOR: | |
643 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_IOR); | |
644 | break; | |
645 | case VALPY_BITXOR: | |
646 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_XOR); | |
647 | break; | |
7843261b TJB |
648 | } |
649 | } | |
650 | GDB_PY_HANDLE_EXCEPTION (except); | |
651 | ||
cc924cad | 652 | return res_val ? value_to_value_object (res_val) : NULL; |
7843261b TJB |
653 | } |
654 | ||
655 | static PyObject * | |
656 | valpy_add (PyObject *self, PyObject *other) | |
657 | { | |
658 | return valpy_binop (VALPY_ADD, self, other); | |
659 | } | |
660 | ||
661 | static PyObject * | |
662 | valpy_subtract (PyObject *self, PyObject *other) | |
663 | { | |
664 | return valpy_binop (VALPY_SUB, self, other); | |
665 | } | |
666 | ||
667 | static PyObject * | |
668 | valpy_multiply (PyObject *self, PyObject *other) | |
669 | { | |
670 | return valpy_binop (VALPY_MUL, self, other); | |
671 | } | |
672 | ||
673 | static PyObject * | |
674 | valpy_divide (PyObject *self, PyObject *other) | |
675 | { | |
676 | return valpy_binop (VALPY_DIV, self, other); | |
677 | } | |
678 | ||
679 | static PyObject * | |
680 | valpy_remainder (PyObject *self, PyObject *other) | |
681 | { | |
682 | return valpy_binop (VALPY_REM, self, other); | |
683 | } | |
684 | ||
685 | static PyObject * | |
686 | valpy_power (PyObject *self, PyObject *other, PyObject *unused) | |
687 | { | |
688 | /* We don't support the ternary form of pow. I don't know how to express | |
689 | that, so let's just throw NotImplementedError to at least do something | |
690 | about it. */ | |
691 | if (unused != Py_None) | |
692 | { | |
693 | PyErr_SetString (PyExc_NotImplementedError, | |
694 | "Invalid operation on gdb.Value."); | |
695 | return NULL; | |
696 | } | |
697 | ||
698 | return valpy_binop (VALPY_POW, self, other); | |
699 | } | |
700 | ||
701 | static PyObject * | |
702 | valpy_negative (PyObject *self) | |
703 | { | |
704 | struct value *val = NULL; | |
705 | volatile struct gdb_exception except; | |
706 | ||
707 | TRY_CATCH (except, RETURN_MASK_ALL) | |
708 | { | |
709 | val = value_neg (((value_object *) self)->value); | |
710 | } | |
711 | GDB_PY_HANDLE_EXCEPTION (except); | |
712 | ||
713 | return value_to_value_object (val); | |
714 | } | |
715 | ||
716 | static PyObject * | |
717 | valpy_positive (PyObject *self) | |
718 | { | |
4e7a5ef5 | 719 | return value_to_value_object (((value_object *) self)->value); |
7843261b TJB |
720 | } |
721 | ||
722 | static PyObject * | |
723 | valpy_absolute (PyObject *self) | |
724 | { | |
22601c15 | 725 | struct value *value = ((value_object *) self)->value; |
d59b6f6c | 726 | |
22601c15 | 727 | if (value_less (value, value_zero (value_type (value), not_lval))) |
7843261b TJB |
728 | return valpy_negative (self); |
729 | else | |
730 | return valpy_positive (self); | |
731 | } | |
732 | ||
733 | /* Implements boolean evaluation of gdb.Value. */ | |
734 | static int | |
735 | valpy_nonzero (PyObject *self) | |
736 | { | |
737 | value_object *self_value = (value_object *) self; | |
738 | struct type *type; | |
739 | ||
740 | type = check_typedef (value_type (self_value->value)); | |
741 | ||
742 | if (is_integral_type (type) || TYPE_CODE (type) == TYPE_CODE_PTR) | |
743 | return !!value_as_long (self_value->value); | |
744 | else if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
745 | return value_as_double (self_value->value) != 0; | |
746 | else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
747 | return !decimal_is_zero (value_contents (self_value->value), | |
e17a4113 UW |
748 | TYPE_LENGTH (type), |
749 | gdbarch_byte_order (get_type_arch (type))); | |
7843261b | 750 | else |
96f73ba5 TT |
751 | /* All other values are True. */ |
752 | return 1; | |
7843261b TJB |
753 | } |
754 | ||
08c637de | 755 | /* Implements ~ for value objects. */ |
7843261b | 756 | static PyObject * |
08c637de | 757 | valpy_invert (PyObject *self) |
7843261b | 758 | { |
08c637de | 759 | struct value *val = NULL; |
7843261b TJB |
760 | volatile struct gdb_exception except; |
761 | ||
08c637de | 762 | TRY_CATCH (except, RETURN_MASK_ALL) |
7843261b | 763 | { |
08c637de TJB |
764 | val = value_complement (((value_object *) self)->value); |
765 | } | |
766 | GDB_PY_HANDLE_EXCEPTION (except); | |
7843261b | 767 | |
08c637de TJB |
768 | return value_to_value_object (val); |
769 | } | |
7843261b | 770 | |
08c637de TJB |
771 | /* Implements left shift for value objects. */ |
772 | static PyObject * | |
773 | valpy_lsh (PyObject *self, PyObject *other) | |
774 | { | |
775 | return valpy_binop (VALPY_LSH, self, other); | |
776 | } | |
7843261b | 777 | |
08c637de TJB |
778 | /* Implements right shift for value objects. */ |
779 | static PyObject * | |
780 | valpy_rsh (PyObject *self, PyObject *other) | |
781 | { | |
782 | return valpy_binop (VALPY_RSH, self, other); | |
783 | } | |
7843261b | 784 | |
08c637de TJB |
785 | /* Implements bitwise and for value objects. */ |
786 | static PyObject * | |
787 | valpy_and (PyObject *self, PyObject *other) | |
788 | { | |
789 | return valpy_binop (VALPY_BITAND, self, other); | |
790 | } | |
7843261b | 791 | |
08c637de TJB |
792 | /* Implements bitwise or for value objects. */ |
793 | static PyObject * | |
794 | valpy_or (PyObject *self, PyObject *other) | |
795 | { | |
796 | return valpy_binop (VALPY_BITOR, self, other); | |
797 | } | |
798 | ||
799 | /* Implements bitwise xor for value objects. */ | |
800 | static PyObject * | |
801 | valpy_xor (PyObject *self, PyObject *other) | |
802 | { | |
803 | return valpy_binop (VALPY_BITXOR, self, other); | |
804 | } | |
805 | ||
806 | /* Implements comparison operations for value objects. */ | |
807 | static PyObject * | |
808 | valpy_richcompare (PyObject *self, PyObject *other, int op) | |
809 | { | |
810 | int result = 0; | |
811 | struct value *value_other; | |
812 | volatile struct gdb_exception except; | |
813 | ||
814 | if (other == Py_None) | |
7843261b TJB |
815 | /* Comparing with None is special. From what I can tell, in Python |
816 | None is smaller than anything else. */ | |
817 | switch (op) { | |
818 | case Py_LT: | |
819 | case Py_LE: | |
820 | case Py_EQ: | |
821 | Py_RETURN_FALSE; | |
822 | case Py_NE: | |
823 | case Py_GT: | |
824 | case Py_GE: | |
825 | Py_RETURN_TRUE; | |
826 | default: | |
827 | /* Can't happen. */ | |
828 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 829 | _("Invalid operation on gdb.Value.")); |
7843261b TJB |
830 | return NULL; |
831 | } | |
7843261b TJB |
832 | |
833 | TRY_CATCH (except, RETURN_MASK_ALL) | |
834 | { | |
08c637de TJB |
835 | value_other = convert_value_from_python (other); |
836 | if (value_other == NULL) | |
f02779d8 TT |
837 | { |
838 | result = -1; | |
839 | break; | |
840 | } | |
08c637de | 841 | |
7843261b TJB |
842 | switch (op) { |
843 | case Py_LT: | |
844 | result = value_less (((value_object *) self)->value, value_other); | |
845 | break; | |
846 | case Py_LE: | |
847 | result = value_less (((value_object *) self)->value, value_other) | |
848 | || value_equal (((value_object *) self)->value, value_other); | |
849 | break; | |
850 | case Py_EQ: | |
851 | result = value_equal (((value_object *) self)->value, value_other); | |
852 | break; | |
853 | case Py_NE: | |
854 | result = !value_equal (((value_object *) self)->value, value_other); | |
855 | break; | |
856 | case Py_GT: | |
857 | result = value_less (value_other, ((value_object *) self)->value); | |
858 | break; | |
859 | case Py_GE: | |
860 | result = value_less (value_other, ((value_object *) self)->value) | |
861 | || value_equal (((value_object *) self)->value, value_other); | |
862 | break; | |
863 | default: | |
864 | /* Can't happen. */ | |
865 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 866 | _("Invalid operation on gdb.Value.")); |
f02779d8 TT |
867 | result = -1; |
868 | break; | |
7843261b TJB |
869 | } |
870 | } | |
871 | GDB_PY_HANDLE_EXCEPTION (except); | |
872 | ||
f02779d8 TT |
873 | /* In this case, the Python exception has already been set. */ |
874 | if (result < 0) | |
875 | return NULL; | |
876 | ||
7843261b TJB |
877 | if (result == 1) |
878 | Py_RETURN_TRUE; | |
879 | ||
880 | Py_RETURN_FALSE; | |
881 | } | |
882 | ||
08c637de TJB |
883 | /* Helper function to determine if a type is "int-like". */ |
884 | static int | |
885 | is_intlike (struct type *type, int ptr_ok) | |
886 | { | |
887 | CHECK_TYPEDEF (type); | |
888 | return (TYPE_CODE (type) == TYPE_CODE_INT | |
889 | || TYPE_CODE (type) == TYPE_CODE_ENUM | |
890 | || TYPE_CODE (type) == TYPE_CODE_BOOL | |
891 | || TYPE_CODE (type) == TYPE_CODE_CHAR | |
892 | || (ptr_ok && TYPE_CODE (type) == TYPE_CODE_PTR)); | |
893 | } | |
894 | ||
895 | /* Implements conversion to int. */ | |
896 | static PyObject * | |
897 | valpy_int (PyObject *self) | |
898 | { | |
899 | struct value *value = ((value_object *) self)->value; | |
900 | struct type *type = value_type (value); | |
901 | LONGEST l = 0; | |
902 | volatile struct gdb_exception except; | |
903 | ||
904 | CHECK_TYPEDEF (type); | |
905 | if (!is_intlike (type, 0)) | |
906 | { | |
044c0f87 PM |
907 | PyErr_SetString (PyExc_RuntimeError, |
908 | _("Cannot convert value to int.")); | |
08c637de TJB |
909 | return NULL; |
910 | } | |
911 | ||
912 | TRY_CATCH (except, RETURN_MASK_ALL) | |
913 | { | |
914 | l = value_as_long (value); | |
915 | } | |
916 | GDB_PY_HANDLE_EXCEPTION (except); | |
917 | ||
89fa5381 TT |
918 | #ifdef HAVE_LONG_LONG /* Defined by Python. */ |
919 | /* If we have 'long long', and the value overflows a 'long', use a | |
920 | Python Long; otherwise use a Python Int. */ | |
921 | if (sizeof (l) > sizeof (long) && (l > PyInt_GetMax () | |
922 | || l < (- (LONGEST) PyInt_GetMax ()) - 1)) | |
923 | return PyLong_FromLongLong (l); | |
924 | #endif | |
08c637de TJB |
925 | return PyInt_FromLong (l); |
926 | } | |
927 | ||
928 | /* Implements conversion to long. */ | |
929 | static PyObject * | |
930 | valpy_long (PyObject *self) | |
931 | { | |
932 | struct value *value = ((value_object *) self)->value; | |
933 | struct type *type = value_type (value); | |
934 | LONGEST l = 0; | |
935 | volatile struct gdb_exception except; | |
936 | ||
937 | if (!is_intlike (type, 1)) | |
938 | { | |
044c0f87 PM |
939 | PyErr_SetString (PyExc_RuntimeError, |
940 | _("Cannot convert value to long.")); | |
08c637de TJB |
941 | return NULL; |
942 | } | |
943 | ||
944 | TRY_CATCH (except, RETURN_MASK_ALL) | |
945 | { | |
946 | l = value_as_long (value); | |
947 | } | |
948 | GDB_PY_HANDLE_EXCEPTION (except); | |
949 | ||
89fa5381 TT |
950 | #ifdef HAVE_LONG_LONG /* Defined by Python. */ |
951 | return PyLong_FromLongLong (l); | |
952 | #else | |
08c637de | 953 | return PyLong_FromLong (l); |
89fa5381 | 954 | #endif |
08c637de TJB |
955 | } |
956 | ||
957 | /* Implements conversion to float. */ | |
958 | static PyObject * | |
959 | valpy_float (PyObject *self) | |
960 | { | |
961 | struct value *value = ((value_object *) self)->value; | |
962 | struct type *type = value_type (value); | |
963 | double d = 0; | |
964 | volatile struct gdb_exception except; | |
965 | ||
966 | CHECK_TYPEDEF (type); | |
967 | if (TYPE_CODE (type) != TYPE_CODE_FLT) | |
968 | { | |
044c0f87 PM |
969 | PyErr_SetString (PyExc_RuntimeError, |
970 | _("Cannot convert value to float.")); | |
08c637de TJB |
971 | return NULL; |
972 | } | |
973 | ||
974 | TRY_CATCH (except, RETURN_MASK_ALL) | |
975 | { | |
976 | d = value_as_double (value); | |
977 | } | |
978 | GDB_PY_HANDLE_EXCEPTION (except); | |
979 | ||
980 | return PyFloat_FromDouble (d); | |
981 | } | |
982 | ||
7843261b TJB |
983 | /* Returns an object for a value which is released from the all_values chain, |
984 | so its lifetime is not bound to the execution of a command. */ | |
985 | PyObject * | |
986 | value_to_value_object (struct value *val) | |
987 | { | |
988 | value_object *val_obj; | |
989 | ||
990 | val_obj = PyObject_New (value_object, &value_object_type); | |
991 | if (val_obj != NULL) | |
992 | { | |
993 | val_obj->value = val; | |
4e7a5ef5 | 994 | value_incref (val); |
c0c6f777 | 995 | val_obj->address = NULL; |
2c74e833 | 996 | val_obj->type = NULL; |
4e7a5ef5 | 997 | note_value (val_obj); |
7843261b TJB |
998 | } |
999 | ||
1000 | return (PyObject *) val_obj; | |
1001 | } | |
1002 | ||
4e7a5ef5 TT |
1003 | /* Returns a borrowed reference to the struct value corresponding to |
1004 | the given value object. */ | |
a6bac58e TT |
1005 | struct value * |
1006 | value_object_to_value (PyObject *self) | |
1007 | { | |
1008 | value_object *real; | |
d59b6f6c | 1009 | |
a6bac58e TT |
1010 | if (! PyObject_TypeCheck (self, &value_object_type)) |
1011 | return NULL; | |
1012 | real = (value_object *) self; | |
1013 | return real->value; | |
1014 | } | |
1015 | ||
7843261b | 1016 | /* Try to convert a Python value to a gdb value. If the value cannot |
4e7a5ef5 TT |
1017 | be converted, set a Python exception and return NULL. Returns a |
1018 | reference to a new value on the all_values chain. */ | |
7843261b TJB |
1019 | |
1020 | struct value * | |
1021 | convert_value_from_python (PyObject *obj) | |
1022 | { | |
1023 | struct value *value = NULL; /* -Wall */ | |
7843261b | 1024 | struct cleanup *old; |
08c637de TJB |
1025 | volatile struct gdb_exception except; |
1026 | int cmp; | |
7843261b | 1027 | |
08c637de | 1028 | gdb_assert (obj != NULL); |
7843261b | 1029 | |
08c637de | 1030 | TRY_CATCH (except, RETURN_MASK_ALL) |
7843261b | 1031 | { |
08c637de TJB |
1032 | if (PyBool_Check (obj)) |
1033 | { | |
1034 | cmp = PyObject_IsTrue (obj); | |
1035 | if (cmp >= 0) | |
1036 | value = value_from_longest (builtin_type_pybool, cmp); | |
1037 | } | |
1038 | else if (PyInt_Check (obj)) | |
1039 | { | |
1040 | long l = PyInt_AsLong (obj); | |
7843261b | 1041 | |
08c637de TJB |
1042 | if (! PyErr_Occurred ()) |
1043 | value = value_from_longest (builtin_type_pyint, l); | |
1044 | } | |
1045 | else if (PyLong_Check (obj)) | |
1046 | { | |
1047 | LONGEST l = PyLong_AsLongLong (obj); | |
7843261b | 1048 | |
595939de PM |
1049 | if (PyErr_Occurred ()) |
1050 | { | |
1051 | /* If the error was an overflow, we can try converting to | |
1052 | ULONGEST instead. */ | |
1053 | if (PyErr_ExceptionMatches (PyExc_OverflowError)) | |
1054 | { | |
1055 | PyObject *etype, *evalue, *etraceback, *zero; | |
1056 | ||
1057 | PyErr_Fetch (&etype, &evalue, &etraceback); | |
1058 | zero = PyInt_FromLong (0); | |
1059 | ||
1060 | /* Check whether obj is positive. */ | |
1061 | if (PyObject_RichCompareBool (obj, zero, Py_GT) > 0) | |
1062 | { | |
1063 | ULONGEST ul; | |
1064 | ||
1065 | ul = PyLong_AsUnsignedLongLong (obj); | |
1066 | if (! PyErr_Occurred ()) | |
1067 | value = value_from_ulongest (builtin_type_upylong, ul); | |
1068 | } | |
1069 | else | |
1070 | /* There's nothing we can do. */ | |
1071 | PyErr_Restore (etype, evalue, etraceback); | |
1072 | ||
1073 | Py_DECREF (zero); | |
1074 | } | |
1075 | } | |
1076 | else | |
08c637de TJB |
1077 | value = value_from_longest (builtin_type_pylong, l); |
1078 | } | |
1079 | else if (PyFloat_Check (obj)) | |
1080 | { | |
1081 | double d = PyFloat_AsDouble (obj); | |
7843261b | 1082 | |
08c637de TJB |
1083 | if (! PyErr_Occurred ()) |
1084 | value = value_from_double (builtin_type_pyfloat, d); | |
1085 | } | |
1086 | else if (gdbpy_is_string (obj)) | |
1087 | { | |
1088 | char *s; | |
1089 | ||
1090 | s = python_string_to_target_string (obj); | |
1091 | if (s != NULL) | |
1092 | { | |
1093 | old = make_cleanup (xfree, s); | |
3b7538c0 | 1094 | value = value_cstring (s, strlen (s), builtin_type_pychar); |
08c637de TJB |
1095 | do_cleanups (old); |
1096 | } | |
1097 | } | |
1098 | else if (PyObject_TypeCheck (obj, &value_object_type)) | |
cc924cad | 1099 | value = value_copy (((value_object *) obj)->value); |
be759fcf PM |
1100 | else if (gdbpy_is_lazy_string (obj)) |
1101 | { | |
1102 | PyObject *result; | |
1103 | PyObject *function = PyString_FromString ("value"); | |
d59b6f6c | 1104 | |
be759fcf PM |
1105 | result = PyObject_CallMethodObjArgs (obj, function, NULL); |
1106 | value = value_copy (((value_object *) result)->value); | |
1107 | } | |
08c637de | 1108 | else |
044c0f87 | 1109 | PyErr_Format (PyExc_TypeError, _("Could not convert Python object: %s."), |
08c637de TJB |
1110 | PyString_AsString (PyObject_Str (obj))); |
1111 | } | |
1112 | if (except.reason < 0) | |
1113 | { | |
1114 | PyErr_Format (except.reason == RETURN_QUIT | |
1115 | ? PyExc_KeyboardInterrupt : PyExc_RuntimeError, | |
1116 | "%s", except.message); | |
1117 | return NULL; | |
1118 | } | |
7843261b TJB |
1119 | |
1120 | return value; | |
1121 | } | |
1122 | ||
1123 | /* Returns value object in the ARGth position in GDB's history. */ | |
1124 | PyObject * | |
08c637de | 1125 | gdbpy_history (PyObject *self, PyObject *args) |
7843261b TJB |
1126 | { |
1127 | int i; | |
1128 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
1129 | volatile struct gdb_exception except; | |
1130 | ||
1131 | if (!PyArg_ParseTuple (args, "i", &i)) | |
1132 | return NULL; | |
1133 | ||
1134 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1135 | { | |
1136 | res_val = access_value_history (i); | |
1137 | } | |
1138 | GDB_PY_HANDLE_EXCEPTION (except); | |
1139 | ||
1140 | return value_to_value_object (res_val); | |
1141 | } | |
1142 | ||
595939de PM |
1143 | /* Returns 1 in OBJ is a gdb.Value object, 0 otherwise. */ |
1144 | ||
1145 | int | |
1146 | gdbpy_is_value_object (PyObject *obj) | |
1147 | { | |
1148 | return PyObject_TypeCheck (obj, &value_object_type); | |
1149 | } | |
1150 | ||
7843261b TJB |
1151 | void |
1152 | gdbpy_initialize_values (void) | |
1153 | { | |
7843261b TJB |
1154 | if (PyType_Ready (&value_object_type) < 0) |
1155 | return; | |
1156 | ||
1157 | Py_INCREF (&value_object_type); | |
1158 | PyModule_AddObject (gdb_module, "Value", (PyObject *) &value_object_type); | |
1159 | ||
1160 | values_in_python = NULL; | |
1161 | } | |
1162 | ||
2c74e833 TT |
1163 | \f |
1164 | ||
def2b000 | 1165 | static PyGetSetDef value_object_getset[] = { |
c0c6f777 TJB |
1166 | { "address", valpy_get_address, NULL, "The address of the value.", |
1167 | NULL }, | |
def2b000 TJB |
1168 | { "is_optimized_out", valpy_get_is_optimized_out, NULL, |
1169 | "Boolean telling whether the value is optimized out (i.e., not available).", | |
1170 | NULL }, | |
2c74e833 | 1171 | { "type", valpy_get_type, NULL, "Type of the value.", NULL }, |
def2b000 TJB |
1172 | {NULL} /* Sentinel */ |
1173 | }; | |
1174 | ||
f9176c46 | 1175 | static PyMethodDef value_object_methods[] = { |
2c74e833 | 1176 | { "cast", valpy_cast, METH_VARARGS, "Cast the value to the supplied type." }, |
f9ffd4bb TT |
1177 | { "dynamic_cast", valpy_dynamic_cast, METH_VARARGS, |
1178 | "dynamic_cast (gdb.Type) -> gdb.Value\n\ | |
1179 | Cast the value to the supplied type, as if by the C++ dynamic_cast operator." | |
1180 | }, | |
1181 | { "reinterpret_cast", valpy_reinterpret_cast, METH_VARARGS, | |
1182 | "reinterpret_cast (gdb.Type) -> gdb.Value\n\ | |
1183 | Cast the value to the supplied type, as if by the C++\n\ | |
1184 | reinterpret_cast operator." | |
1185 | }, | |
f9176c46 | 1186 | { "dereference", valpy_dereference, METH_NOARGS, "Dereferences the value." }, |
be759fcf PM |
1187 | { "lazy_string", (PyCFunction) valpy_lazy_string, METH_VARARGS | METH_KEYWORDS, |
1188 | "lazy_string ([encoding] [, length]) -> lazy_string\n\ | |
1189 | Return a lazy string representation of the value." }, | |
cc924cad | 1190 | { "string", (PyCFunction) valpy_string, METH_VARARGS | METH_KEYWORDS, |
fbb8f299 | 1191 | "string ([encoding] [, errors] [, length]) -> string\n\ |
cc924cad | 1192 | Return Unicode string representation of the value." }, |
f9176c46 PA |
1193 | {NULL} /* Sentinel */ |
1194 | }; | |
1195 | ||
1196 | static PyNumberMethods value_object_as_number = { | |
1197 | valpy_add, | |
1198 | valpy_subtract, | |
1199 | valpy_multiply, | |
1200 | valpy_divide, | |
1201 | valpy_remainder, | |
1202 | NULL, /* nb_divmod */ | |
1203 | valpy_power, /* nb_power */ | |
1204 | valpy_negative, /* nb_negative */ | |
1205 | valpy_positive, /* nb_positive */ | |
1206 | valpy_absolute, /* nb_absolute */ | |
08c637de TJB |
1207 | valpy_nonzero, /* nb_nonzero */ |
1208 | valpy_invert, /* nb_invert */ | |
1209 | valpy_lsh, /* nb_lshift */ | |
1210 | valpy_rsh, /* nb_rshift */ | |
1211 | valpy_and, /* nb_and */ | |
1212 | valpy_xor, /* nb_xor */ | |
1213 | valpy_or, /* nb_or */ | |
1214 | NULL, /* nb_coerce */ | |
1215 | valpy_int, /* nb_int */ | |
1216 | valpy_long, /* nb_long */ | |
1217 | valpy_float, /* nb_float */ | |
1218 | NULL, /* nb_oct */ | |
1219 | NULL /* nb_hex */ | |
f9176c46 PA |
1220 | }; |
1221 | ||
1222 | static PyMappingMethods value_object_as_mapping = { | |
1223 | valpy_length, | |
1224 | valpy_getitem, | |
1225 | valpy_setitem | |
1226 | }; | |
1227 | ||
1228 | PyTypeObject value_object_type = { | |
1229 | PyObject_HEAD_INIT (NULL) | |
1230 | 0, /*ob_size*/ | |
1231 | "gdb.Value", /*tp_name*/ | |
1232 | sizeof (value_object), /*tp_basicsize*/ | |
1233 | 0, /*tp_itemsize*/ | |
1234 | valpy_dealloc, /*tp_dealloc*/ | |
1235 | 0, /*tp_print*/ | |
1236 | 0, /*tp_getattr*/ | |
1237 | 0, /*tp_setattr*/ | |
1238 | 0, /*tp_compare*/ | |
1239 | 0, /*tp_repr*/ | |
1240 | &value_object_as_number, /*tp_as_number*/ | |
1241 | 0, /*tp_as_sequence*/ | |
1242 | &value_object_as_mapping, /*tp_as_mapping*/ | |
88d4aea7 | 1243 | valpy_hash, /*tp_hash*/ |
5374244e | 1244 | valpy_call, /*tp_call*/ |
f9176c46 PA |
1245 | valpy_str, /*tp_str*/ |
1246 | 0, /*tp_getattro*/ | |
1247 | 0, /*tp_setattro*/ | |
1248 | 0, /*tp_as_buffer*/ | |
1249 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES, /*tp_flags*/ | |
1250 | "GDB value object", /* tp_doc */ | |
1251 | 0, /* tp_traverse */ | |
1252 | 0, /* tp_clear */ | |
1253 | valpy_richcompare, /* tp_richcompare */ | |
1254 | 0, /* tp_weaklistoffset */ | |
1255 | 0, /* tp_iter */ | |
1256 | 0, /* tp_iternext */ | |
08c637de TJB |
1257 | value_object_methods, /* tp_methods */ |
1258 | 0, /* tp_members */ | |
def2b000 | 1259 | value_object_getset, /* tp_getset */ |
08c637de TJB |
1260 | 0, /* tp_base */ |
1261 | 0, /* tp_dict */ | |
1262 | 0, /* tp_descr_get */ | |
1263 | 0, /* tp_descr_set */ | |
1264 | 0, /* tp_dictoffset */ | |
1265 | 0, /* tp_init */ | |
1266 | 0, /* tp_alloc */ | |
1267 | valpy_new /* tp_new */ | |
f9176c46 PA |
1268 | }; |
1269 | ||
4e7a5ef5 TT |
1270 | #else |
1271 | ||
1272 | void | |
1273 | preserve_python_values (struct objfile *objfile, htab_t copied_types) | |
1274 | { | |
1275 | /* Nothing. */ | |
1276 | } | |
1277 | ||
7843261b | 1278 | #endif /* HAVE_PYTHON */ |