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7843261b TJB |
1 | /* Python interface to values. |
2 | ||
7b6bb8da | 3 | Copyright (C) 2008, 2009, 2010, 2011 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" |
03f17ccf | 30 | #include "cp-abi.h" |
7843261b | 31 | |
7843261b TJB |
32 | #ifdef HAVE_PYTHON |
33 | ||
34 | #include "python-internal.h" | |
35 | ||
36 | /* Even though Python scalar types directly map to host types, we use | |
37 | target types here to remain consistent with the the values system in | |
38 | GDB (which uses target arithmetic). */ | |
39 | ||
40 | /* Python's integer type corresponds to C's long type. */ | |
d452c4bc | 41 | #define builtin_type_pyint builtin_type (python_gdbarch)->builtin_long |
7843261b TJB |
42 | |
43 | /* Python's float type corresponds to C's double type. */ | |
d452c4bc | 44 | #define builtin_type_pyfloat builtin_type (python_gdbarch)->builtin_double |
7843261b TJB |
45 | |
46 | /* Python's long type corresponds to C's long long type. */ | |
d452c4bc | 47 | #define builtin_type_pylong builtin_type (python_gdbarch)->builtin_long_long |
7843261b | 48 | |
595939de PM |
49 | /* Python's long type corresponds to C's long long type. Unsigned version. */ |
50 | #define builtin_type_upylong builtin_type \ | |
51 | (python_gdbarch)->builtin_unsigned_long_long | |
52 | ||
7843261b | 53 | #define builtin_type_pybool \ |
d452c4bc | 54 | language_bool_type (python_language, python_gdbarch) |
7843261b | 55 | |
3b7538c0 | 56 | #define builtin_type_pychar \ |
d452c4bc | 57 | language_string_char_type (python_language, python_gdbarch) |
3b7538c0 | 58 | |
4e7a5ef5 | 59 | typedef struct value_object { |
7843261b | 60 | PyObject_HEAD |
4e7a5ef5 TT |
61 | struct value_object *next; |
62 | struct value_object *prev; | |
7843261b | 63 | struct value *value; |
c0c6f777 | 64 | PyObject *address; |
2c74e833 | 65 | PyObject *type; |
03f17ccf | 66 | PyObject *dynamic_type; |
7843261b TJB |
67 | } value_object; |
68 | ||
4e7a5ef5 TT |
69 | /* List of all values which are currently exposed to Python. It is |
70 | maintained so that when an objfile is discarded, preserve_values | |
71 | can copy the values' types if needed. */ | |
72 | /* This variable is unnecessarily initialized to NULL in order to | |
73 | work around a linker bug on MacOS. */ | |
74 | static value_object *values_in_python = NULL; | |
75 | ||
7843261b TJB |
76 | /* Called by the Python interpreter when deallocating a value object. */ |
77 | static void | |
78 | valpy_dealloc (PyObject *obj) | |
79 | { | |
80 | value_object *self = (value_object *) obj; | |
81 | ||
4e7a5ef5 TT |
82 | /* Remove SELF from the global list. */ |
83 | if (self->prev) | |
84 | self->prev->next = self->next; | |
85 | else | |
86 | { | |
87 | gdb_assert (values_in_python == self); | |
88 | values_in_python = self->next; | |
89 | } | |
90 | if (self->next) | |
91 | self->next->prev = self->prev; | |
7843261b | 92 | |
77316f4c | 93 | value_free (self->value); |
c0c6f777 TJB |
94 | |
95 | if (self->address) | |
96 | /* Use braces to appease gcc warning. *sigh* */ | |
97 | { | |
98 | Py_DECREF (self->address); | |
99 | } | |
100 | ||
2c74e833 TT |
101 | if (self->type) |
102 | { | |
103 | Py_DECREF (self->type); | |
104 | } | |
105 | ||
03f17ccf TT |
106 | Py_XDECREF (self->dynamic_type); |
107 | ||
7843261b TJB |
108 | self->ob_type->tp_free (self); |
109 | } | |
110 | ||
4e7a5ef5 TT |
111 | /* Helper to push a Value object on the global list. */ |
112 | static void | |
113 | note_value (value_object *value_obj) | |
114 | { | |
115 | value_obj->next = values_in_python; | |
116 | if (value_obj->next) | |
117 | value_obj->next->prev = value_obj; | |
118 | value_obj->prev = NULL; | |
119 | values_in_python = value_obj; | |
120 | } | |
121 | ||
8dc78533 JK |
122 | /* Called when a new gdb.Value object needs to be allocated. Returns NULL on |
123 | error, with a python exception set. */ | |
7843261b TJB |
124 | static PyObject * |
125 | valpy_new (PyTypeObject *subtype, PyObject *args, PyObject *keywords) | |
126 | { | |
127 | struct value *value = NULL; /* Initialize to appease gcc warning. */ | |
128 | value_object *value_obj; | |
7843261b TJB |
129 | |
130 | if (PyTuple_Size (args) != 1) | |
131 | { | |
132 | PyErr_SetString (PyExc_TypeError, _("Value object creation takes only " | |
133 | "1 argument")); | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | value_obj = (value_object *) subtype->tp_alloc (subtype, 1); | |
138 | if (value_obj == NULL) | |
139 | { | |
140 | PyErr_SetString (PyExc_MemoryError, _("Could not allocate memory to " | |
141 | "create Value object.")); | |
142 | return NULL; | |
143 | } | |
144 | ||
08c637de TJB |
145 | value = convert_value_from_python (PyTuple_GetItem (args, 0)); |
146 | if (value == NULL) | |
7843261b TJB |
147 | { |
148 | subtype->tp_free (value_obj); | |
08c637de | 149 | return NULL; |
7843261b TJB |
150 | } |
151 | ||
152 | value_obj->value = value; | |
4e7a5ef5 | 153 | value_incref (value); |
c0c6f777 | 154 | value_obj->address = NULL; |
2c74e833 | 155 | value_obj->type = NULL; |
03f17ccf | 156 | value_obj->dynamic_type = NULL; |
4e7a5ef5 | 157 | note_value (value_obj); |
7843261b TJB |
158 | |
159 | return (PyObject *) value_obj; | |
160 | } | |
161 | ||
4e7a5ef5 TT |
162 | /* Iterate over all the Value objects, calling preserve_one_value on |
163 | each. */ | |
164 | void | |
165 | preserve_python_values (struct objfile *objfile, htab_t copied_types) | |
166 | { | |
167 | value_object *iter; | |
168 | ||
169 | for (iter = values_in_python; iter; iter = iter->next) | |
170 | preserve_one_value (iter->value, objfile, copied_types); | |
171 | } | |
172 | ||
7843261b TJB |
173 | /* Given a value of a pointer type, apply the C unary * operator to it. */ |
174 | static PyObject * | |
175 | valpy_dereference (PyObject *self, PyObject *args) | |
176 | { | |
177 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
178 | volatile struct gdb_exception except; | |
179 | ||
180 | TRY_CATCH (except, RETURN_MASK_ALL) | |
181 | { | |
182 | res_val = value_ind (((value_object *) self)->value); | |
183 | } | |
184 | GDB_PY_HANDLE_EXCEPTION (except); | |
185 | ||
186 | return value_to_value_object (res_val); | |
187 | } | |
188 | ||
08c637de TJB |
189 | /* Return "&value". */ |
190 | static PyObject * | |
c0c6f777 | 191 | valpy_get_address (PyObject *self, void *closure) |
08c637de TJB |
192 | { |
193 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
c0c6f777 | 194 | value_object *val_obj = (value_object *) self; |
08c637de TJB |
195 | volatile struct gdb_exception except; |
196 | ||
c0c6f777 | 197 | if (!val_obj->address) |
08c637de | 198 | { |
c0c6f777 TJB |
199 | TRY_CATCH (except, RETURN_MASK_ALL) |
200 | { | |
201 | res_val = value_addr (val_obj->value); | |
202 | } | |
203 | if (except.reason < 0) | |
204 | { | |
205 | val_obj->address = Py_None; | |
206 | Py_INCREF (Py_None); | |
207 | } | |
208 | else | |
209 | val_obj->address = value_to_value_object (res_val); | |
08c637de | 210 | } |
08c637de | 211 | |
c0c6f777 TJB |
212 | Py_INCREF (val_obj->address); |
213 | ||
214 | return val_obj->address; | |
08c637de TJB |
215 | } |
216 | ||
2c74e833 TT |
217 | /* Return type of the value. */ |
218 | static PyObject * | |
219 | valpy_get_type (PyObject *self, void *closure) | |
220 | { | |
221 | value_object *obj = (value_object *) self; | |
d59b6f6c | 222 | |
2c74e833 TT |
223 | if (!obj->type) |
224 | { | |
225 | obj->type = type_to_type_object (value_type (obj->value)); | |
226 | if (!obj->type) | |
03f17ccf | 227 | return NULL; |
2c74e833 TT |
228 | } |
229 | Py_INCREF (obj->type); | |
230 | return obj->type; | |
231 | } | |
232 | ||
03f17ccf TT |
233 | /* Return dynamic type of the value. */ |
234 | ||
235 | static PyObject * | |
236 | valpy_get_dynamic_type (PyObject *self, void *closure) | |
237 | { | |
238 | value_object *obj = (value_object *) self; | |
239 | volatile struct gdb_exception except; | |
240 | struct type *type = NULL; | |
241 | ||
242 | if (obj->dynamic_type != NULL) | |
243 | { | |
244 | Py_INCREF (obj->dynamic_type); | |
245 | return obj->dynamic_type; | |
246 | } | |
247 | ||
248 | TRY_CATCH (except, RETURN_MASK_ALL) | |
249 | { | |
250 | struct value *val = obj->value; | |
251 | ||
252 | type = value_type (val); | |
253 | CHECK_TYPEDEF (type); | |
254 | ||
255 | if (((TYPE_CODE (type) == TYPE_CODE_PTR) | |
256 | || (TYPE_CODE (type) == TYPE_CODE_REF)) | |
257 | && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS)) | |
258 | { | |
259 | struct value *target; | |
260 | int was_pointer = TYPE_CODE (type) == TYPE_CODE_PTR; | |
261 | ||
262 | target = value_ind (val); | |
263 | type = value_rtti_type (target, NULL, NULL, NULL); | |
264 | ||
265 | if (type) | |
266 | { | |
267 | if (was_pointer) | |
268 | type = lookup_pointer_type (type); | |
269 | else | |
270 | type = lookup_reference_type (type); | |
271 | } | |
272 | } | |
273 | else if (TYPE_CODE (type) == TYPE_CODE_CLASS) | |
274 | type = value_rtti_type (val, NULL, NULL, NULL); | |
275 | else | |
276 | { | |
277 | /* Re-use object's static type. */ | |
278 | type = NULL; | |
279 | } | |
280 | } | |
281 | GDB_PY_HANDLE_EXCEPTION (except); | |
282 | ||
283 | if (type == NULL) | |
284 | { | |
285 | /* Ensure that the TYPE field is ready. */ | |
286 | if (!valpy_get_type (self, NULL)) | |
287 | return NULL; | |
288 | /* We don't need to incref here, because valpy_get_type already | |
289 | did it for us. */ | |
290 | obj->dynamic_type = obj->type; | |
291 | } | |
292 | else | |
293 | obj->dynamic_type = type_to_type_object (type); | |
294 | ||
295 | Py_INCREF (obj->dynamic_type); | |
296 | return obj->dynamic_type; | |
297 | } | |
298 | ||
be759fcf PM |
299 | /* Implementation of gdb.Value.lazy_string ([encoding] [, length]) -> |
300 | string. Return a PyObject representing a lazy_string_object type. | |
301 | A lazy string is a pointer to a string with an optional encoding and | |
302 | length. If ENCODING is not given, encoding is set to None. If an | |
303 | ENCODING is provided the encoding parameter is set to ENCODING, but | |
304 | the string is not encoded. If LENGTH is provided then the length | |
305 | parameter is set to LENGTH, otherwise length will be set to -1 (first | |
306 | null of appropriate with). */ | |
307 | static PyObject * | |
308 | valpy_lazy_string (PyObject *self, PyObject *args, PyObject *kw) | |
309 | { | |
74aedc46 | 310 | gdb_py_longest length = -1; |
be759fcf PM |
311 | struct value *value = ((value_object *) self)->value; |
312 | const char *user_encoding = NULL; | |
313 | static char *keywords[] = { "encoding", "length", NULL }; | |
314 | PyObject *str_obj; | |
315 | ||
74aedc46 | 316 | if (!PyArg_ParseTupleAndKeywords (args, kw, "|s" GDB_PY_LL_ARG, keywords, |
be759fcf PM |
317 | &user_encoding, &length)) |
318 | return NULL; | |
319 | ||
320 | if (TYPE_CODE (value_type (value)) == TYPE_CODE_PTR) | |
321 | value = value_ind (value); | |
322 | ||
323 | str_obj = gdbpy_create_lazy_string_object (value_address (value), length, | |
9a2b4c1b MS |
324 | user_encoding, |
325 | value_type (value)); | |
be759fcf PM |
326 | |
327 | return (PyObject *) str_obj; | |
328 | } | |
329 | ||
fbb8f299 PM |
330 | /* Implementation of gdb.Value.string ([encoding] [, errors] |
331 | [, length]) -> string. Return Unicode string with value contents. | |
332 | If ENCODING is not given, the string is assumed to be encoded in | |
333 | the target's charset. If LENGTH is provided, only fetch string to | |
334 | the length provided. */ | |
335 | ||
b6cb8e7d | 336 | static PyObject * |
cc924cad | 337 | valpy_string (PyObject *self, PyObject *args, PyObject *kw) |
b6cb8e7d | 338 | { |
f92adf3c | 339 | int length = -1; |
b6cb8e7d TJB |
340 | gdb_byte *buffer; |
341 | struct value *value = ((value_object *) self)->value; | |
342 | volatile struct gdb_exception except; | |
343 | PyObject *unicode; | |
344 | const char *encoding = NULL; | |
345 | const char *errors = NULL; | |
346 | const char *user_encoding = NULL; | |
347 | const char *la_encoding = NULL; | |
96c07c5b | 348 | struct type *char_type; |
31158f0e | 349 | static char *keywords[] = { "encoding", "errors", "length", NULL }; |
b6cb8e7d | 350 | |
fbb8f299 PM |
351 | if (!PyArg_ParseTupleAndKeywords (args, kw, "|ssi", keywords, |
352 | &user_encoding, &errors, &length)) | |
b6cb8e7d TJB |
353 | return NULL; |
354 | ||
355 | TRY_CATCH (except, RETURN_MASK_ALL) | |
356 | { | |
96c07c5b | 357 | LA_GET_STRING (value, &buffer, &length, &char_type, &la_encoding); |
b6cb8e7d TJB |
358 | } |
359 | GDB_PY_HANDLE_EXCEPTION (except); | |
360 | ||
361 | encoding = (user_encoding && *user_encoding) ? user_encoding : la_encoding; | |
96c07c5b TT |
362 | unicode = PyUnicode_Decode (buffer, length * TYPE_LENGTH (char_type), |
363 | encoding, errors); | |
b6cb8e7d TJB |
364 | xfree (buffer); |
365 | ||
366 | return unicode; | |
367 | } | |
368 | ||
f9ffd4bb TT |
369 | /* A helper function that implements the various cast operators. */ |
370 | ||
2c74e833 | 371 | static PyObject * |
f9ffd4bb | 372 | valpy_do_cast (PyObject *self, PyObject *args, enum exp_opcode op) |
2c74e833 TT |
373 | { |
374 | PyObject *type_obj; | |
375 | struct type *type; | |
376 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
377 | volatile struct gdb_exception except; | |
378 | ||
379 | if (! PyArg_ParseTuple (args, "O", &type_obj)) | |
380 | return NULL; | |
381 | ||
382 | type = type_object_to_type (type_obj); | |
383 | if (! type) | |
384 | { | |
044c0f87 PM |
385 | PyErr_SetString (PyExc_RuntimeError, |
386 | _("Argument must be a type.")); | |
2c74e833 TT |
387 | return NULL; |
388 | } | |
389 | ||
390 | TRY_CATCH (except, RETURN_MASK_ALL) | |
391 | { | |
f9ffd4bb TT |
392 | struct value *val = ((value_object *) self)->value; |
393 | ||
394 | if (op == UNOP_DYNAMIC_CAST) | |
395 | res_val = value_dynamic_cast (type, val); | |
396 | else if (op == UNOP_REINTERPRET_CAST) | |
397 | res_val = value_reinterpret_cast (type, val); | |
398 | else | |
399 | { | |
400 | gdb_assert (op == UNOP_CAST); | |
401 | res_val = value_cast (type, val); | |
402 | } | |
2c74e833 TT |
403 | } |
404 | GDB_PY_HANDLE_EXCEPTION (except); | |
405 | ||
406 | return value_to_value_object (res_val); | |
407 | } | |
408 | ||
f9ffd4bb TT |
409 | /* Implementation of the "cast" method. */ |
410 | ||
411 | static PyObject * | |
412 | valpy_cast (PyObject *self, PyObject *args) | |
413 | { | |
414 | return valpy_do_cast (self, args, UNOP_CAST); | |
415 | } | |
416 | ||
417 | /* Implementation of the "dynamic_cast" method. */ | |
418 | ||
419 | static PyObject * | |
420 | valpy_dynamic_cast (PyObject *self, PyObject *args) | |
421 | { | |
422 | return valpy_do_cast (self, args, UNOP_DYNAMIC_CAST); | |
423 | } | |
424 | ||
425 | /* Implementation of the "reinterpret_cast" method. */ | |
426 | ||
427 | static PyObject * | |
428 | valpy_reinterpret_cast (PyObject *self, PyObject *args) | |
429 | { | |
430 | return valpy_do_cast (self, args, UNOP_REINTERPRET_CAST); | |
431 | } | |
432 | ||
7843261b TJB |
433 | static Py_ssize_t |
434 | valpy_length (PyObject *self) | |
435 | { | |
436 | /* We don't support getting the number of elements in a struct / class. */ | |
437 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 438 | _("Invalid operation on gdb.Value.")); |
7843261b TJB |
439 | return -1; |
440 | } | |
441 | ||
442 | /* Given string name of an element inside structure, return its value | |
8dc78533 | 443 | object. Returns NULL on error, with a python exception set. */ |
7843261b TJB |
444 | static PyObject * |
445 | valpy_getitem (PyObject *self, PyObject *key) | |
446 | { | |
447 | value_object *self_value = (value_object *) self; | |
08c637de | 448 | char *field = NULL; |
570e2b1a | 449 | struct value *res_val = NULL; |
7843261b TJB |
450 | volatile struct gdb_exception except; |
451 | ||
08c637de TJB |
452 | if (gdbpy_is_string (key)) |
453 | { | |
454 | field = python_string_to_host_string (key); | |
455 | if (field == NULL) | |
456 | return NULL; | |
457 | } | |
7843261b TJB |
458 | |
459 | TRY_CATCH (except, RETURN_MASK_ALL) | |
460 | { | |
3c0ed299 | 461 | struct value *tmp = self_value->value; |
08c637de TJB |
462 | |
463 | if (field) | |
464 | res_val = value_struct_elt (&tmp, NULL, field, 0, NULL); | |
465 | else | |
466 | { | |
467 | /* Assume we are attempting an array access, and let the | |
468 | value code throw an exception if the index has an invalid | |
469 | type. */ | |
470 | struct value *idx = convert_value_from_python (key); | |
d59b6f6c | 471 | |
570e2b1a | 472 | if (idx != NULL) |
2e4d963f PM |
473 | { |
474 | /* Check the value's type is something that can be accessed via | |
475 | a subscript. */ | |
476 | struct type *type; | |
d59b6f6c | 477 | |
2e4d963f PM |
478 | tmp = coerce_ref (tmp); |
479 | type = check_typedef (value_type (tmp)); | |
480 | if (TYPE_CODE (type) != TYPE_CODE_ARRAY | |
481 | && TYPE_CODE (type) != TYPE_CODE_PTR) | |
044c0f87 | 482 | error( _("Cannot subscript requested type.")); |
2e4d963f PM |
483 | else |
484 | res_val = value_subscript (tmp, value_as_long (idx)); | |
485 | } | |
08c637de | 486 | } |
7843261b | 487 | } |
570e2b1a | 488 | |
06878dd2 | 489 | xfree (field); |
7843261b TJB |
490 | GDB_PY_HANDLE_EXCEPTION (except); |
491 | ||
06878dd2 | 492 | return res_val ? value_to_value_object (res_val) : NULL; |
7843261b TJB |
493 | } |
494 | ||
495 | static int | |
496 | valpy_setitem (PyObject *self, PyObject *key, PyObject *value) | |
497 | { | |
498 | PyErr_Format (PyExc_NotImplementedError, | |
499 | _("Setting of struct elements is not currently supported.")); | |
500 | return -1; | |
501 | } | |
502 | ||
5374244e | 503 | /* Called by the Python interpreter to perform an inferior function |
8dc78533 | 504 | call on the value. Returns NULL on error, with a python exception set. */ |
5374244e PM |
505 | static PyObject * |
506 | valpy_call (PyObject *self, PyObject *args, PyObject *keywords) | |
507 | { | |
508 | struct value *return_value = NULL; | |
509 | Py_ssize_t args_count; | |
510 | volatile struct gdb_exception except; | |
511 | struct value *function = ((value_object *) self)->value; | |
512 | struct value **vargs = NULL; | |
513 | struct type *ftype = check_typedef (value_type (function)); | |
514 | ||
515 | if (TYPE_CODE (ftype) != TYPE_CODE_FUNC) | |
516 | { | |
517 | PyErr_SetString (PyExc_RuntimeError, | |
518 | _("Value is not callable (not TYPE_CODE_FUNC).")); | |
519 | return NULL; | |
520 | } | |
521 | ||
522 | args_count = PyTuple_Size (args); | |
523 | if (args_count > 0) | |
524 | { | |
525 | int i; | |
526 | ||
527 | vargs = alloca (sizeof (struct value *) * args_count); | |
528 | for (i = 0; i < args_count; i++) | |
529 | { | |
530 | PyObject *item = PyTuple_GetItem (args, i); | |
531 | ||
532 | if (item == NULL) | |
533 | return NULL; | |
534 | ||
535 | vargs[i] = convert_value_from_python (item); | |
536 | if (vargs[i] == NULL) | |
537 | return NULL; | |
538 | } | |
539 | } | |
540 | ||
541 | TRY_CATCH (except, RETURN_MASK_ALL) | |
542 | { | |
543 | return_value = call_function_by_hand (function, args_count, vargs); | |
544 | } | |
545 | GDB_PY_HANDLE_EXCEPTION (except); | |
546 | ||
547 | return value_to_value_object (return_value); | |
548 | } | |
549 | ||
7843261b TJB |
550 | /* Called by the Python interpreter to obtain string representation |
551 | of the object. */ | |
552 | static PyObject * | |
553 | valpy_str (PyObject *self) | |
554 | { | |
555 | char *s = NULL; | |
7843261b TJB |
556 | struct ui_file *stb; |
557 | struct cleanup *old_chain; | |
558 | PyObject *result; | |
79a45b7d | 559 | struct value_print_options opts; |
7843261b TJB |
560 | volatile struct gdb_exception except; |
561 | ||
79a45b7d TT |
562 | get_user_print_options (&opts); |
563 | opts.deref_ref = 0; | |
564 | ||
7843261b TJB |
565 | stb = mem_fileopen (); |
566 | old_chain = make_cleanup_ui_file_delete (stb); | |
567 | ||
568 | TRY_CATCH (except, RETURN_MASK_ALL) | |
569 | { | |
79a45b7d | 570 | common_val_print (((value_object *) self)->value, stb, 0, |
d452c4bc | 571 | &opts, python_language); |
759ef836 | 572 | s = ui_file_xstrdup (stb, NULL); |
7843261b TJB |
573 | } |
574 | GDB_PY_HANDLE_EXCEPTION (except); | |
575 | ||
576 | do_cleanups (old_chain); | |
577 | ||
578 | result = PyUnicode_Decode (s, strlen (s), host_charset (), NULL); | |
579 | xfree (s); | |
580 | ||
581 | return result; | |
582 | } | |
583 | ||
def2b000 TJB |
584 | /* Implements gdb.Value.is_optimized_out. */ |
585 | static PyObject * | |
586 | valpy_get_is_optimized_out (PyObject *self, void *closure) | |
587 | { | |
588 | struct value *value = ((value_object *) self)->value; | |
589 | ||
590 | if (value_optimized_out (value)) | |
591 | Py_RETURN_TRUE; | |
592 | ||
593 | Py_RETURN_FALSE; | |
594 | } | |
595 | ||
88d4aea7 PM |
596 | /* Calculate and return the address of the PyObject as the value of |
597 | the builtin __hash__ call. */ | |
598 | static long | |
599 | valpy_hash (PyObject *self) | |
600 | { | |
601 | return (long) (intptr_t) self; | |
602 | } | |
603 | ||
7843261b TJB |
604 | enum valpy_opcode |
605 | { | |
606 | VALPY_ADD, | |
607 | VALPY_SUB, | |
608 | VALPY_MUL, | |
609 | VALPY_DIV, | |
610 | VALPY_REM, | |
08c637de TJB |
611 | VALPY_POW, |
612 | VALPY_LSH, | |
613 | VALPY_RSH, | |
614 | VALPY_BITAND, | |
615 | VALPY_BITOR, | |
616 | VALPY_BITXOR | |
7843261b TJB |
617 | }; |
618 | ||
619 | /* If TYPE is a reference, return the target; otherwise return TYPE. */ | |
620 | #define STRIP_REFERENCE(TYPE) \ | |
621 | ((TYPE_CODE (TYPE) == TYPE_CODE_REF) ? (TYPE_TARGET_TYPE (TYPE)) : (TYPE)) | |
622 | ||
623 | /* Returns a value object which is the result of applying the operation | |
8dc78533 JK |
624 | specified by OPCODE to the given arguments. Returns NULL on error, with |
625 | a python exception set. */ | |
7843261b TJB |
626 | static PyObject * |
627 | valpy_binop (enum valpy_opcode opcode, PyObject *self, PyObject *other) | |
628 | { | |
629 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
630 | volatile struct gdb_exception except; | |
631 | ||
632 | TRY_CATCH (except, RETURN_MASK_ALL) | |
633 | { | |
634 | struct value *arg1, *arg2; | |
635 | ||
636 | /* If the gdb.Value object is the second operand, then it will be passed | |
637 | to us as the OTHER argument, and SELF will be an entirely different | |
638 | kind of object, altogether. Because of this, we can't assume self is | |
639 | a gdb.Value object and need to convert it from python as well. */ | |
640 | arg1 = convert_value_from_python (self); | |
08c637de | 641 | if (arg1 == NULL) |
cc924cad | 642 | break; |
08c637de | 643 | |
7843261b | 644 | arg2 = convert_value_from_python (other); |
08c637de | 645 | if (arg2 == NULL) |
cc924cad | 646 | break; |
7843261b TJB |
647 | |
648 | switch (opcode) | |
649 | { | |
650 | case VALPY_ADD: | |
651 | { | |
652 | struct type *ltype = value_type (arg1); | |
653 | struct type *rtype = value_type (arg2); | |
654 | ||
655 | CHECK_TYPEDEF (ltype); | |
656 | ltype = STRIP_REFERENCE (ltype); | |
657 | CHECK_TYPEDEF (rtype); | |
658 | rtype = STRIP_REFERENCE (rtype); | |
659 | ||
2497b498 UW |
660 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
661 | && is_integral_type (rtype)) | |
662 | res_val = value_ptradd (arg1, value_as_long (arg2)); | |
663 | else if (TYPE_CODE (rtype) == TYPE_CODE_PTR | |
664 | && is_integral_type (ltype)) | |
665 | res_val = value_ptradd (arg2, value_as_long (arg1)); | |
7843261b TJB |
666 | else |
667 | res_val = value_binop (arg1, arg2, BINOP_ADD); | |
668 | } | |
669 | break; | |
670 | case VALPY_SUB: | |
671 | { | |
672 | struct type *ltype = value_type (arg1); | |
673 | struct type *rtype = value_type (arg2); | |
674 | ||
675 | CHECK_TYPEDEF (ltype); | |
676 | ltype = STRIP_REFERENCE (ltype); | |
677 | CHECK_TYPEDEF (rtype); | |
678 | rtype = STRIP_REFERENCE (rtype); | |
679 | ||
2497b498 UW |
680 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
681 | && TYPE_CODE (rtype) == TYPE_CODE_PTR) | |
682 | /* A ptrdiff_t for the target would be preferable here. */ | |
683 | res_val = value_from_longest (builtin_type_pyint, | |
684 | value_ptrdiff (arg1, arg2)); | |
685 | else if (TYPE_CODE (ltype) == TYPE_CODE_PTR | |
686 | && is_integral_type (rtype)) | |
687 | res_val = value_ptradd (arg1, - value_as_long (arg2)); | |
7843261b TJB |
688 | else |
689 | res_val = value_binop (arg1, arg2, BINOP_SUB); | |
690 | } | |
691 | break; | |
692 | case VALPY_MUL: | |
693 | res_val = value_binop (arg1, arg2, BINOP_MUL); | |
694 | break; | |
695 | case VALPY_DIV: | |
696 | res_val = value_binop (arg1, arg2, BINOP_DIV); | |
697 | break; | |
698 | case VALPY_REM: | |
699 | res_val = value_binop (arg1, arg2, BINOP_REM); | |
700 | break; | |
701 | case VALPY_POW: | |
702 | res_val = value_binop (arg1, arg2, BINOP_EXP); | |
703 | break; | |
08c637de TJB |
704 | case VALPY_LSH: |
705 | res_val = value_binop (arg1, arg2, BINOP_LSH); | |
706 | break; | |
707 | case VALPY_RSH: | |
708 | res_val = value_binop (arg1, arg2, BINOP_RSH); | |
709 | break; | |
710 | case VALPY_BITAND: | |
711 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_AND); | |
712 | break; | |
713 | case VALPY_BITOR: | |
714 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_IOR); | |
715 | break; | |
716 | case VALPY_BITXOR: | |
717 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_XOR); | |
718 | break; | |
7843261b TJB |
719 | } |
720 | } | |
721 | GDB_PY_HANDLE_EXCEPTION (except); | |
722 | ||
cc924cad | 723 | return res_val ? value_to_value_object (res_val) : NULL; |
7843261b TJB |
724 | } |
725 | ||
726 | static PyObject * | |
727 | valpy_add (PyObject *self, PyObject *other) | |
728 | { | |
729 | return valpy_binop (VALPY_ADD, self, other); | |
730 | } | |
731 | ||
732 | static PyObject * | |
733 | valpy_subtract (PyObject *self, PyObject *other) | |
734 | { | |
735 | return valpy_binop (VALPY_SUB, self, other); | |
736 | } | |
737 | ||
738 | static PyObject * | |
739 | valpy_multiply (PyObject *self, PyObject *other) | |
740 | { | |
741 | return valpy_binop (VALPY_MUL, self, other); | |
742 | } | |
743 | ||
744 | static PyObject * | |
745 | valpy_divide (PyObject *self, PyObject *other) | |
746 | { | |
747 | return valpy_binop (VALPY_DIV, self, other); | |
748 | } | |
749 | ||
750 | static PyObject * | |
751 | valpy_remainder (PyObject *self, PyObject *other) | |
752 | { | |
753 | return valpy_binop (VALPY_REM, self, other); | |
754 | } | |
755 | ||
756 | static PyObject * | |
757 | valpy_power (PyObject *self, PyObject *other, PyObject *unused) | |
758 | { | |
759 | /* We don't support the ternary form of pow. I don't know how to express | |
760 | that, so let's just throw NotImplementedError to at least do something | |
761 | about it. */ | |
762 | if (unused != Py_None) | |
763 | { | |
764 | PyErr_SetString (PyExc_NotImplementedError, | |
765 | "Invalid operation on gdb.Value."); | |
766 | return NULL; | |
767 | } | |
768 | ||
769 | return valpy_binop (VALPY_POW, self, other); | |
770 | } | |
771 | ||
772 | static PyObject * | |
773 | valpy_negative (PyObject *self) | |
774 | { | |
775 | struct value *val = NULL; | |
776 | volatile struct gdb_exception except; | |
777 | ||
778 | TRY_CATCH (except, RETURN_MASK_ALL) | |
779 | { | |
780 | val = value_neg (((value_object *) self)->value); | |
781 | } | |
782 | GDB_PY_HANDLE_EXCEPTION (except); | |
783 | ||
784 | return value_to_value_object (val); | |
785 | } | |
786 | ||
787 | static PyObject * | |
788 | valpy_positive (PyObject *self) | |
789 | { | |
4e7a5ef5 | 790 | return value_to_value_object (((value_object *) self)->value); |
7843261b TJB |
791 | } |
792 | ||
793 | static PyObject * | |
794 | valpy_absolute (PyObject *self) | |
795 | { | |
22601c15 | 796 | struct value *value = ((value_object *) self)->value; |
d59b6f6c | 797 | |
22601c15 | 798 | if (value_less (value, value_zero (value_type (value), not_lval))) |
7843261b TJB |
799 | return valpy_negative (self); |
800 | else | |
801 | return valpy_positive (self); | |
802 | } | |
803 | ||
804 | /* Implements boolean evaluation of gdb.Value. */ | |
805 | static int | |
806 | valpy_nonzero (PyObject *self) | |
807 | { | |
808 | value_object *self_value = (value_object *) self; | |
809 | struct type *type; | |
810 | ||
811 | type = check_typedef (value_type (self_value->value)); | |
812 | ||
813 | if (is_integral_type (type) || TYPE_CODE (type) == TYPE_CODE_PTR) | |
814 | return !!value_as_long (self_value->value); | |
815 | else if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
816 | return value_as_double (self_value->value) != 0; | |
817 | else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
818 | return !decimal_is_zero (value_contents (self_value->value), | |
e17a4113 UW |
819 | TYPE_LENGTH (type), |
820 | gdbarch_byte_order (get_type_arch (type))); | |
7843261b | 821 | else |
96f73ba5 TT |
822 | /* All other values are True. */ |
823 | return 1; | |
7843261b TJB |
824 | } |
825 | ||
08c637de | 826 | /* Implements ~ for value objects. */ |
7843261b | 827 | static PyObject * |
08c637de | 828 | valpy_invert (PyObject *self) |
7843261b | 829 | { |
08c637de | 830 | struct value *val = NULL; |
7843261b TJB |
831 | volatile struct gdb_exception except; |
832 | ||
08c637de | 833 | TRY_CATCH (except, RETURN_MASK_ALL) |
7843261b | 834 | { |
08c637de TJB |
835 | val = value_complement (((value_object *) self)->value); |
836 | } | |
837 | GDB_PY_HANDLE_EXCEPTION (except); | |
7843261b | 838 | |
08c637de TJB |
839 | return value_to_value_object (val); |
840 | } | |
7843261b | 841 | |
08c637de TJB |
842 | /* Implements left shift for value objects. */ |
843 | static PyObject * | |
844 | valpy_lsh (PyObject *self, PyObject *other) | |
845 | { | |
846 | return valpy_binop (VALPY_LSH, self, other); | |
847 | } | |
7843261b | 848 | |
08c637de TJB |
849 | /* Implements right shift for value objects. */ |
850 | static PyObject * | |
851 | valpy_rsh (PyObject *self, PyObject *other) | |
852 | { | |
853 | return valpy_binop (VALPY_RSH, self, other); | |
854 | } | |
7843261b | 855 | |
08c637de TJB |
856 | /* Implements bitwise and for value objects. */ |
857 | static PyObject * | |
858 | valpy_and (PyObject *self, PyObject *other) | |
859 | { | |
860 | return valpy_binop (VALPY_BITAND, self, other); | |
861 | } | |
7843261b | 862 | |
08c637de TJB |
863 | /* Implements bitwise or for value objects. */ |
864 | static PyObject * | |
865 | valpy_or (PyObject *self, PyObject *other) | |
866 | { | |
867 | return valpy_binop (VALPY_BITOR, self, other); | |
868 | } | |
869 | ||
870 | /* Implements bitwise xor for value objects. */ | |
871 | static PyObject * | |
872 | valpy_xor (PyObject *self, PyObject *other) | |
873 | { | |
874 | return valpy_binop (VALPY_BITXOR, self, other); | |
875 | } | |
876 | ||
8dc78533 JK |
877 | /* Implements comparison operations for value objects. Returns NULL on error, |
878 | with a python exception set. */ | |
08c637de TJB |
879 | static PyObject * |
880 | valpy_richcompare (PyObject *self, PyObject *other, int op) | |
881 | { | |
882 | int result = 0; | |
883 | struct value *value_other; | |
884 | volatile struct gdb_exception except; | |
885 | ||
886 | if (other == Py_None) | |
7843261b TJB |
887 | /* Comparing with None is special. From what I can tell, in Python |
888 | None is smaller than anything else. */ | |
889 | switch (op) { | |
890 | case Py_LT: | |
891 | case Py_LE: | |
892 | case Py_EQ: | |
893 | Py_RETURN_FALSE; | |
894 | case Py_NE: | |
895 | case Py_GT: | |
896 | case Py_GE: | |
897 | Py_RETURN_TRUE; | |
898 | default: | |
899 | /* Can't happen. */ | |
900 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 901 | _("Invalid operation on gdb.Value.")); |
7843261b TJB |
902 | return NULL; |
903 | } | |
7843261b TJB |
904 | |
905 | TRY_CATCH (except, RETURN_MASK_ALL) | |
906 | { | |
08c637de TJB |
907 | value_other = convert_value_from_python (other); |
908 | if (value_other == NULL) | |
f02779d8 TT |
909 | { |
910 | result = -1; | |
911 | break; | |
912 | } | |
08c637de | 913 | |
7843261b TJB |
914 | switch (op) { |
915 | case Py_LT: | |
916 | result = value_less (((value_object *) self)->value, value_other); | |
917 | break; | |
918 | case Py_LE: | |
919 | result = value_less (((value_object *) self)->value, value_other) | |
920 | || value_equal (((value_object *) self)->value, value_other); | |
921 | break; | |
922 | case Py_EQ: | |
923 | result = value_equal (((value_object *) self)->value, value_other); | |
924 | break; | |
925 | case Py_NE: | |
926 | result = !value_equal (((value_object *) self)->value, value_other); | |
927 | break; | |
928 | case Py_GT: | |
929 | result = value_less (value_other, ((value_object *) self)->value); | |
930 | break; | |
931 | case Py_GE: | |
932 | result = value_less (value_other, ((value_object *) self)->value) | |
933 | || value_equal (((value_object *) self)->value, value_other); | |
934 | break; | |
935 | default: | |
936 | /* Can't happen. */ | |
937 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 938 | _("Invalid operation on gdb.Value.")); |
f02779d8 TT |
939 | result = -1; |
940 | break; | |
7843261b TJB |
941 | } |
942 | } | |
943 | GDB_PY_HANDLE_EXCEPTION (except); | |
944 | ||
f02779d8 TT |
945 | /* In this case, the Python exception has already been set. */ |
946 | if (result < 0) | |
947 | return NULL; | |
948 | ||
7843261b TJB |
949 | if (result == 1) |
950 | Py_RETURN_TRUE; | |
951 | ||
952 | Py_RETURN_FALSE; | |
953 | } | |
954 | ||
08c637de TJB |
955 | /* Helper function to determine if a type is "int-like". */ |
956 | static int | |
957 | is_intlike (struct type *type, int ptr_ok) | |
958 | { | |
959 | CHECK_TYPEDEF (type); | |
960 | return (TYPE_CODE (type) == TYPE_CODE_INT | |
961 | || TYPE_CODE (type) == TYPE_CODE_ENUM | |
962 | || TYPE_CODE (type) == TYPE_CODE_BOOL | |
963 | || TYPE_CODE (type) == TYPE_CODE_CHAR | |
964 | || (ptr_ok && TYPE_CODE (type) == TYPE_CODE_PTR)); | |
965 | } | |
966 | ||
967 | /* Implements conversion to int. */ | |
968 | static PyObject * | |
969 | valpy_int (PyObject *self) | |
970 | { | |
971 | struct value *value = ((value_object *) self)->value; | |
972 | struct type *type = value_type (value); | |
973 | LONGEST l = 0; | |
974 | volatile struct gdb_exception except; | |
975 | ||
976 | CHECK_TYPEDEF (type); | |
977 | if (!is_intlike (type, 0)) | |
978 | { | |
044c0f87 PM |
979 | PyErr_SetString (PyExc_RuntimeError, |
980 | _("Cannot convert value to int.")); | |
08c637de TJB |
981 | return NULL; |
982 | } | |
983 | ||
984 | TRY_CATCH (except, RETURN_MASK_ALL) | |
985 | { | |
986 | l = value_as_long (value); | |
987 | } | |
988 | GDB_PY_HANDLE_EXCEPTION (except); | |
989 | ||
74aedc46 | 990 | return gdb_py_object_from_longest (l); |
08c637de TJB |
991 | } |
992 | ||
993 | /* Implements conversion to long. */ | |
994 | static PyObject * | |
995 | valpy_long (PyObject *self) | |
996 | { | |
997 | struct value *value = ((value_object *) self)->value; | |
998 | struct type *type = value_type (value); | |
999 | LONGEST l = 0; | |
1000 | volatile struct gdb_exception except; | |
1001 | ||
1002 | if (!is_intlike (type, 1)) | |
1003 | { | |
044c0f87 PM |
1004 | PyErr_SetString (PyExc_RuntimeError, |
1005 | _("Cannot convert value to long.")); | |
08c637de TJB |
1006 | return NULL; |
1007 | } | |
1008 | ||
1009 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1010 | { | |
1011 | l = value_as_long (value); | |
1012 | } | |
1013 | GDB_PY_HANDLE_EXCEPTION (except); | |
1014 | ||
74aedc46 | 1015 | return gdb_py_long_from_longest (l); |
08c637de TJB |
1016 | } |
1017 | ||
1018 | /* Implements conversion to float. */ | |
1019 | static PyObject * | |
1020 | valpy_float (PyObject *self) | |
1021 | { | |
1022 | struct value *value = ((value_object *) self)->value; | |
1023 | struct type *type = value_type (value); | |
1024 | double d = 0; | |
1025 | volatile struct gdb_exception except; | |
1026 | ||
1027 | CHECK_TYPEDEF (type); | |
1028 | if (TYPE_CODE (type) != TYPE_CODE_FLT) | |
1029 | { | |
044c0f87 PM |
1030 | PyErr_SetString (PyExc_RuntimeError, |
1031 | _("Cannot convert value to float.")); | |
08c637de TJB |
1032 | return NULL; |
1033 | } | |
1034 | ||
1035 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1036 | { | |
1037 | d = value_as_double (value); | |
1038 | } | |
1039 | GDB_PY_HANDLE_EXCEPTION (except); | |
1040 | ||
1041 | return PyFloat_FromDouble (d); | |
1042 | } | |
1043 | ||
7843261b TJB |
1044 | /* Returns an object for a value which is released from the all_values chain, |
1045 | so its lifetime is not bound to the execution of a command. */ | |
1046 | PyObject * | |
1047 | value_to_value_object (struct value *val) | |
1048 | { | |
1049 | value_object *val_obj; | |
1050 | ||
1051 | val_obj = PyObject_New (value_object, &value_object_type); | |
1052 | if (val_obj != NULL) | |
1053 | { | |
1054 | val_obj->value = val; | |
4e7a5ef5 | 1055 | value_incref (val); |
c0c6f777 | 1056 | val_obj->address = NULL; |
2c74e833 | 1057 | val_obj->type = NULL; |
03f17ccf | 1058 | val_obj->dynamic_type = NULL; |
4e7a5ef5 | 1059 | note_value (val_obj); |
7843261b TJB |
1060 | } |
1061 | ||
1062 | return (PyObject *) val_obj; | |
1063 | } | |
1064 | ||
4e7a5ef5 TT |
1065 | /* Returns a borrowed reference to the struct value corresponding to |
1066 | the given value object. */ | |
a6bac58e TT |
1067 | struct value * |
1068 | value_object_to_value (PyObject *self) | |
1069 | { | |
1070 | value_object *real; | |
d59b6f6c | 1071 | |
a6bac58e TT |
1072 | if (! PyObject_TypeCheck (self, &value_object_type)) |
1073 | return NULL; | |
1074 | real = (value_object *) self; | |
1075 | return real->value; | |
1076 | } | |
1077 | ||
7843261b | 1078 | /* Try to convert a Python value to a gdb value. If the value cannot |
4e7a5ef5 TT |
1079 | be converted, set a Python exception and return NULL. Returns a |
1080 | reference to a new value on the all_values chain. */ | |
7843261b TJB |
1081 | |
1082 | struct value * | |
1083 | convert_value_from_python (PyObject *obj) | |
1084 | { | |
1085 | struct value *value = NULL; /* -Wall */ | |
7843261b | 1086 | struct cleanup *old; |
08c637de TJB |
1087 | volatile struct gdb_exception except; |
1088 | int cmp; | |
7843261b | 1089 | |
08c637de | 1090 | gdb_assert (obj != NULL); |
7843261b | 1091 | |
08c637de | 1092 | TRY_CATCH (except, RETURN_MASK_ALL) |
7843261b | 1093 | { |
08c637de TJB |
1094 | if (PyBool_Check (obj)) |
1095 | { | |
1096 | cmp = PyObject_IsTrue (obj); | |
1097 | if (cmp >= 0) | |
1098 | value = value_from_longest (builtin_type_pybool, cmp); | |
1099 | } | |
1100 | else if (PyInt_Check (obj)) | |
1101 | { | |
1102 | long l = PyInt_AsLong (obj); | |
7843261b | 1103 | |
08c637de TJB |
1104 | if (! PyErr_Occurred ()) |
1105 | value = value_from_longest (builtin_type_pyint, l); | |
1106 | } | |
1107 | else if (PyLong_Check (obj)) | |
1108 | { | |
1109 | LONGEST l = PyLong_AsLongLong (obj); | |
7843261b | 1110 | |
595939de PM |
1111 | if (PyErr_Occurred ()) |
1112 | { | |
1113 | /* If the error was an overflow, we can try converting to | |
1114 | ULONGEST instead. */ | |
1115 | if (PyErr_ExceptionMatches (PyExc_OverflowError)) | |
1116 | { | |
1117 | PyObject *etype, *evalue, *etraceback, *zero; | |
1118 | ||
1119 | PyErr_Fetch (&etype, &evalue, &etraceback); | |
1120 | zero = PyInt_FromLong (0); | |
1121 | ||
1122 | /* Check whether obj is positive. */ | |
1123 | if (PyObject_RichCompareBool (obj, zero, Py_GT) > 0) | |
1124 | { | |
1125 | ULONGEST ul; | |
1126 | ||
1127 | ul = PyLong_AsUnsignedLongLong (obj); | |
1128 | if (! PyErr_Occurred ()) | |
1129 | value = value_from_ulongest (builtin_type_upylong, ul); | |
1130 | } | |
1131 | else | |
1132 | /* There's nothing we can do. */ | |
1133 | PyErr_Restore (etype, evalue, etraceback); | |
1134 | ||
1135 | Py_DECREF (zero); | |
1136 | } | |
1137 | } | |
1138 | else | |
08c637de TJB |
1139 | value = value_from_longest (builtin_type_pylong, l); |
1140 | } | |
1141 | else if (PyFloat_Check (obj)) | |
1142 | { | |
1143 | double d = PyFloat_AsDouble (obj); | |
7843261b | 1144 | |
08c637de TJB |
1145 | if (! PyErr_Occurred ()) |
1146 | value = value_from_double (builtin_type_pyfloat, d); | |
1147 | } | |
1148 | else if (gdbpy_is_string (obj)) | |
1149 | { | |
1150 | char *s; | |
1151 | ||
1152 | s = python_string_to_target_string (obj); | |
1153 | if (s != NULL) | |
1154 | { | |
1155 | old = make_cleanup (xfree, s); | |
3b7538c0 | 1156 | value = value_cstring (s, strlen (s), builtin_type_pychar); |
08c637de TJB |
1157 | do_cleanups (old); |
1158 | } | |
1159 | } | |
1160 | else if (PyObject_TypeCheck (obj, &value_object_type)) | |
cc924cad | 1161 | value = value_copy (((value_object *) obj)->value); |
be759fcf PM |
1162 | else if (gdbpy_is_lazy_string (obj)) |
1163 | { | |
1164 | PyObject *result; | |
1165 | PyObject *function = PyString_FromString ("value"); | |
d59b6f6c | 1166 | |
be759fcf PM |
1167 | result = PyObject_CallMethodObjArgs (obj, function, NULL); |
1168 | value = value_copy (((value_object *) result)->value); | |
1169 | } | |
08c637de | 1170 | else |
9a2b4c1b MS |
1171 | PyErr_Format (PyExc_TypeError, |
1172 | _("Could not convert Python object: %s."), | |
08c637de TJB |
1173 | PyString_AsString (PyObject_Str (obj))); |
1174 | } | |
1175 | if (except.reason < 0) | |
1176 | { | |
1177 | PyErr_Format (except.reason == RETURN_QUIT | |
1178 | ? PyExc_KeyboardInterrupt : PyExc_RuntimeError, | |
1179 | "%s", except.message); | |
1180 | return NULL; | |
1181 | } | |
7843261b TJB |
1182 | |
1183 | return value; | |
1184 | } | |
1185 | ||
1186 | /* Returns value object in the ARGth position in GDB's history. */ | |
1187 | PyObject * | |
08c637de | 1188 | gdbpy_history (PyObject *self, PyObject *args) |
7843261b TJB |
1189 | { |
1190 | int i; | |
1191 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
1192 | volatile struct gdb_exception except; | |
1193 | ||
1194 | if (!PyArg_ParseTuple (args, "i", &i)) | |
1195 | return NULL; | |
1196 | ||
1197 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1198 | { | |
1199 | res_val = access_value_history (i); | |
1200 | } | |
1201 | GDB_PY_HANDLE_EXCEPTION (except); | |
1202 | ||
1203 | return value_to_value_object (res_val); | |
1204 | } | |
1205 | ||
595939de PM |
1206 | /* Returns 1 in OBJ is a gdb.Value object, 0 otherwise. */ |
1207 | ||
1208 | int | |
1209 | gdbpy_is_value_object (PyObject *obj) | |
1210 | { | |
1211 | return PyObject_TypeCheck (obj, &value_object_type); | |
1212 | } | |
1213 | ||
7843261b TJB |
1214 | void |
1215 | gdbpy_initialize_values (void) | |
1216 | { | |
7843261b TJB |
1217 | if (PyType_Ready (&value_object_type) < 0) |
1218 | return; | |
1219 | ||
1220 | Py_INCREF (&value_object_type); | |
1221 | PyModule_AddObject (gdb_module, "Value", (PyObject *) &value_object_type); | |
1222 | ||
1223 | values_in_python = NULL; | |
1224 | } | |
1225 | ||
2c74e833 TT |
1226 | \f |
1227 | ||
def2b000 | 1228 | static PyGetSetDef value_object_getset[] = { |
c0c6f777 TJB |
1229 | { "address", valpy_get_address, NULL, "The address of the value.", |
1230 | NULL }, | |
def2b000 | 1231 | { "is_optimized_out", valpy_get_is_optimized_out, NULL, |
9a2b4c1b MS |
1232 | "Boolean telling whether the value is optimized " |
1233 | "out (i.e., not available).", | |
def2b000 | 1234 | NULL }, |
2c74e833 | 1235 | { "type", valpy_get_type, NULL, "Type of the value.", NULL }, |
03f17ccf TT |
1236 | { "dynamic_type", valpy_get_dynamic_type, NULL, |
1237 | "Dynamic type of the value.", NULL }, | |
def2b000 TJB |
1238 | {NULL} /* Sentinel */ |
1239 | }; | |
1240 | ||
f9176c46 | 1241 | static PyMethodDef value_object_methods[] = { |
2c74e833 | 1242 | { "cast", valpy_cast, METH_VARARGS, "Cast the value to the supplied type." }, |
f9ffd4bb TT |
1243 | { "dynamic_cast", valpy_dynamic_cast, METH_VARARGS, |
1244 | "dynamic_cast (gdb.Type) -> gdb.Value\n\ | |
1245 | Cast the value to the supplied type, as if by the C++ dynamic_cast operator." | |
1246 | }, | |
1247 | { "reinterpret_cast", valpy_reinterpret_cast, METH_VARARGS, | |
1248 | "reinterpret_cast (gdb.Type) -> gdb.Value\n\ | |
1249 | Cast the value to the supplied type, as if by the C++\n\ | |
1250 | reinterpret_cast operator." | |
1251 | }, | |
f9176c46 | 1252 | { "dereference", valpy_dereference, METH_NOARGS, "Dereferences the value." }, |
9a2b4c1b MS |
1253 | { "lazy_string", (PyCFunction) valpy_lazy_string, |
1254 | METH_VARARGS | METH_KEYWORDS, | |
be759fcf PM |
1255 | "lazy_string ([encoding] [, length]) -> lazy_string\n\ |
1256 | Return a lazy string representation of the value." }, | |
cc924cad | 1257 | { "string", (PyCFunction) valpy_string, METH_VARARGS | METH_KEYWORDS, |
fbb8f299 | 1258 | "string ([encoding] [, errors] [, length]) -> string\n\ |
cc924cad | 1259 | Return Unicode string representation of the value." }, |
f9176c46 PA |
1260 | {NULL} /* Sentinel */ |
1261 | }; | |
1262 | ||
1263 | static PyNumberMethods value_object_as_number = { | |
1264 | valpy_add, | |
1265 | valpy_subtract, | |
1266 | valpy_multiply, | |
1267 | valpy_divide, | |
1268 | valpy_remainder, | |
1269 | NULL, /* nb_divmod */ | |
1270 | valpy_power, /* nb_power */ | |
1271 | valpy_negative, /* nb_negative */ | |
1272 | valpy_positive, /* nb_positive */ | |
1273 | valpy_absolute, /* nb_absolute */ | |
08c637de TJB |
1274 | valpy_nonzero, /* nb_nonzero */ |
1275 | valpy_invert, /* nb_invert */ | |
1276 | valpy_lsh, /* nb_lshift */ | |
1277 | valpy_rsh, /* nb_rshift */ | |
1278 | valpy_and, /* nb_and */ | |
1279 | valpy_xor, /* nb_xor */ | |
1280 | valpy_or, /* nb_or */ | |
1281 | NULL, /* nb_coerce */ | |
1282 | valpy_int, /* nb_int */ | |
1283 | valpy_long, /* nb_long */ | |
1284 | valpy_float, /* nb_float */ | |
1285 | NULL, /* nb_oct */ | |
1286 | NULL /* nb_hex */ | |
f9176c46 PA |
1287 | }; |
1288 | ||
1289 | static PyMappingMethods value_object_as_mapping = { | |
1290 | valpy_length, | |
1291 | valpy_getitem, | |
1292 | valpy_setitem | |
1293 | }; | |
1294 | ||
1295 | PyTypeObject value_object_type = { | |
1296 | PyObject_HEAD_INIT (NULL) | |
1297 | 0, /*ob_size*/ | |
1298 | "gdb.Value", /*tp_name*/ | |
1299 | sizeof (value_object), /*tp_basicsize*/ | |
1300 | 0, /*tp_itemsize*/ | |
1301 | valpy_dealloc, /*tp_dealloc*/ | |
1302 | 0, /*tp_print*/ | |
1303 | 0, /*tp_getattr*/ | |
1304 | 0, /*tp_setattr*/ | |
1305 | 0, /*tp_compare*/ | |
1306 | 0, /*tp_repr*/ | |
1307 | &value_object_as_number, /*tp_as_number*/ | |
1308 | 0, /*tp_as_sequence*/ | |
1309 | &value_object_as_mapping, /*tp_as_mapping*/ | |
88d4aea7 | 1310 | valpy_hash, /*tp_hash*/ |
5374244e | 1311 | valpy_call, /*tp_call*/ |
f9176c46 PA |
1312 | valpy_str, /*tp_str*/ |
1313 | 0, /*tp_getattro*/ | |
1314 | 0, /*tp_setattro*/ | |
1315 | 0, /*tp_as_buffer*/ | |
9a2b4c1b MS |
1316 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
1317 | | Py_TPFLAGS_BASETYPE, /*tp_flags*/ | |
f9176c46 PA |
1318 | "GDB value object", /* tp_doc */ |
1319 | 0, /* tp_traverse */ | |
1320 | 0, /* tp_clear */ | |
1321 | valpy_richcompare, /* tp_richcompare */ | |
1322 | 0, /* tp_weaklistoffset */ | |
1323 | 0, /* tp_iter */ | |
1324 | 0, /* tp_iternext */ | |
08c637de TJB |
1325 | value_object_methods, /* tp_methods */ |
1326 | 0, /* tp_members */ | |
def2b000 | 1327 | value_object_getset, /* tp_getset */ |
08c637de TJB |
1328 | 0, /* tp_base */ |
1329 | 0, /* tp_dict */ | |
1330 | 0, /* tp_descr_get */ | |
1331 | 0, /* tp_descr_set */ | |
1332 | 0, /* tp_dictoffset */ | |
1333 | 0, /* tp_init */ | |
1334 | 0, /* tp_alloc */ | |
1335 | valpy_new /* tp_new */ | |
f9176c46 PA |
1336 | }; |
1337 | ||
4e7a5ef5 TT |
1338 | #else |
1339 | ||
1340 | void | |
1341 | preserve_python_values (struct objfile *objfile, htab_t copied_types) | |
1342 | { | |
1343 | /* Nothing. */ | |
1344 | } | |
1345 | ||
7843261b | 1346 | #endif /* HAVE_PYTHON */ |