Commit | Line | Data |
---|---|---|
7843261b TJB |
1 | /* Python interface to values. |
2 | ||
888fe1e1 | 3 | Copyright (C) 2008, 2009, 2010, 2011, 2012 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 | |
b021a221 | 37 | target types here to remain consistent with the values system in |
7843261b TJB |
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; | |
e848a8a5 | 153 | release_value_or_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 | { | |
7843261b | 177 | volatile struct gdb_exception except; |
888fe1e1 | 178 | PyObject *result = NULL; |
7843261b TJB |
179 | |
180 | TRY_CATCH (except, RETURN_MASK_ALL) | |
181 | { | |
888fe1e1 TT |
182 | struct value *res_val; |
183 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); | |
184 | ||
7843261b | 185 | res_val = value_ind (((value_object *) self)->value); |
888fe1e1 TT |
186 | result = value_to_value_object (res_val); |
187 | do_cleanups (cleanup); | |
7843261b TJB |
188 | } |
189 | GDB_PY_HANDLE_EXCEPTION (except); | |
190 | ||
888fe1e1 | 191 | return result; |
7843261b TJB |
192 | } |
193 | ||
08c637de TJB |
194 | /* Return "&value". */ |
195 | static PyObject * | |
c0c6f777 | 196 | valpy_get_address (PyObject *self, void *closure) |
08c637de | 197 | { |
c0c6f777 | 198 | value_object *val_obj = (value_object *) self; |
08c637de TJB |
199 | volatile struct gdb_exception except; |
200 | ||
c0c6f777 | 201 | if (!val_obj->address) |
08c637de | 202 | { |
c0c6f777 TJB |
203 | TRY_CATCH (except, RETURN_MASK_ALL) |
204 | { | |
888fe1e1 TT |
205 | struct value *res_val; |
206 | struct cleanup *cleanup | |
207 | = make_cleanup_value_free_to_mark (value_mark ()); | |
208 | ||
c0c6f777 | 209 | res_val = value_addr (val_obj->value); |
888fe1e1 TT |
210 | val_obj->address = value_to_value_object (res_val); |
211 | do_cleanups (cleanup); | |
c0c6f777 TJB |
212 | } |
213 | if (except.reason < 0) | |
214 | { | |
215 | val_obj->address = Py_None; | |
216 | Py_INCREF (Py_None); | |
217 | } | |
08c637de | 218 | } |
08c637de | 219 | |
3fcaed38 | 220 | Py_XINCREF (val_obj->address); |
c0c6f777 TJB |
221 | |
222 | return val_obj->address; | |
08c637de TJB |
223 | } |
224 | ||
2c74e833 TT |
225 | /* Return type of the value. */ |
226 | static PyObject * | |
227 | valpy_get_type (PyObject *self, void *closure) | |
228 | { | |
229 | value_object *obj = (value_object *) self; | |
d59b6f6c | 230 | |
2c74e833 TT |
231 | if (!obj->type) |
232 | { | |
233 | obj->type = type_to_type_object (value_type (obj->value)); | |
234 | if (!obj->type) | |
03f17ccf | 235 | return NULL; |
2c74e833 TT |
236 | } |
237 | Py_INCREF (obj->type); | |
238 | return obj->type; | |
239 | } | |
240 | ||
03f17ccf TT |
241 | /* Return dynamic type of the value. */ |
242 | ||
243 | static PyObject * | |
244 | valpy_get_dynamic_type (PyObject *self, void *closure) | |
245 | { | |
246 | value_object *obj = (value_object *) self; | |
247 | volatile struct gdb_exception except; | |
248 | struct type *type = NULL; | |
249 | ||
250 | if (obj->dynamic_type != NULL) | |
251 | { | |
252 | Py_INCREF (obj->dynamic_type); | |
253 | return obj->dynamic_type; | |
254 | } | |
255 | ||
256 | TRY_CATCH (except, RETURN_MASK_ALL) | |
257 | { | |
258 | struct value *val = obj->value; | |
888fe1e1 | 259 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); |
03f17ccf TT |
260 | |
261 | type = value_type (val); | |
262 | CHECK_TYPEDEF (type); | |
263 | ||
264 | if (((TYPE_CODE (type) == TYPE_CODE_PTR) | |
265 | || (TYPE_CODE (type) == TYPE_CODE_REF)) | |
266 | && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS)) | |
267 | { | |
268 | struct value *target; | |
269 | int was_pointer = TYPE_CODE (type) == TYPE_CODE_PTR; | |
270 | ||
271 | target = value_ind (val); | |
272 | type = value_rtti_type (target, NULL, NULL, NULL); | |
273 | ||
274 | if (type) | |
275 | { | |
276 | if (was_pointer) | |
277 | type = lookup_pointer_type (type); | |
278 | else | |
279 | type = lookup_reference_type (type); | |
280 | } | |
281 | } | |
282 | else if (TYPE_CODE (type) == TYPE_CODE_CLASS) | |
283 | type = value_rtti_type (val, NULL, NULL, NULL); | |
284 | else | |
285 | { | |
286 | /* Re-use object's static type. */ | |
287 | type = NULL; | |
288 | } | |
888fe1e1 TT |
289 | |
290 | do_cleanups (cleanup); | |
03f17ccf TT |
291 | } |
292 | GDB_PY_HANDLE_EXCEPTION (except); | |
293 | ||
294 | if (type == NULL) | |
295 | { | |
296 | /* Ensure that the TYPE field is ready. */ | |
297 | if (!valpy_get_type (self, NULL)) | |
298 | return NULL; | |
299 | /* We don't need to incref here, because valpy_get_type already | |
300 | did it for us. */ | |
301 | obj->dynamic_type = obj->type; | |
302 | } | |
303 | else | |
304 | obj->dynamic_type = type_to_type_object (type); | |
305 | ||
306 | Py_INCREF (obj->dynamic_type); | |
307 | return obj->dynamic_type; | |
308 | } | |
309 | ||
be759fcf PM |
310 | /* Implementation of gdb.Value.lazy_string ([encoding] [, length]) -> |
311 | string. Return a PyObject representing a lazy_string_object type. | |
312 | A lazy string is a pointer to a string with an optional encoding and | |
313 | length. If ENCODING is not given, encoding is set to None. If an | |
314 | ENCODING is provided the encoding parameter is set to ENCODING, but | |
315 | the string is not encoded. If LENGTH is provided then the length | |
316 | parameter is set to LENGTH, otherwise length will be set to -1 (first | |
317 | null of appropriate with). */ | |
318 | static PyObject * | |
319 | valpy_lazy_string (PyObject *self, PyObject *args, PyObject *kw) | |
320 | { | |
74aedc46 | 321 | gdb_py_longest length = -1; |
be759fcf PM |
322 | struct value *value = ((value_object *) self)->value; |
323 | const char *user_encoding = NULL; | |
324 | static char *keywords[] = { "encoding", "length", NULL }; | |
888fe1e1 | 325 | PyObject *str_obj = NULL; |
f287c1f3 | 326 | volatile struct gdb_exception except; |
be759fcf | 327 | |
74aedc46 | 328 | if (!PyArg_ParseTupleAndKeywords (args, kw, "|s" GDB_PY_LL_ARG, keywords, |
be759fcf PM |
329 | &user_encoding, &length)) |
330 | return NULL; | |
331 | ||
f287c1f3 PM |
332 | TRY_CATCH (except, RETURN_MASK_ALL) |
333 | { | |
888fe1e1 TT |
334 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); |
335 | ||
f287c1f3 PM |
336 | if (TYPE_CODE (value_type (value)) == TYPE_CODE_PTR) |
337 | value = value_ind (value); | |
888fe1e1 TT |
338 | |
339 | str_obj = gdbpy_create_lazy_string_object (value_address (value), length, | |
340 | user_encoding, | |
341 | value_type (value)); | |
342 | ||
343 | do_cleanups (cleanup); | |
f287c1f3 PM |
344 | } |
345 | GDB_PY_HANDLE_EXCEPTION (except); | |
be759fcf | 346 | |
888fe1e1 | 347 | return str_obj; |
be759fcf PM |
348 | } |
349 | ||
fbb8f299 PM |
350 | /* Implementation of gdb.Value.string ([encoding] [, errors] |
351 | [, length]) -> string. Return Unicode string with value contents. | |
352 | If ENCODING is not given, the string is assumed to be encoded in | |
353 | the target's charset. If LENGTH is provided, only fetch string to | |
354 | the length provided. */ | |
355 | ||
b6cb8e7d | 356 | static PyObject * |
cc924cad | 357 | valpy_string (PyObject *self, PyObject *args, PyObject *kw) |
b6cb8e7d | 358 | { |
f92adf3c | 359 | int length = -1; |
b6cb8e7d TJB |
360 | gdb_byte *buffer; |
361 | struct value *value = ((value_object *) self)->value; | |
362 | volatile struct gdb_exception except; | |
363 | PyObject *unicode; | |
364 | const char *encoding = NULL; | |
365 | const char *errors = NULL; | |
366 | const char *user_encoding = NULL; | |
367 | const char *la_encoding = NULL; | |
96c07c5b | 368 | struct type *char_type; |
31158f0e | 369 | static char *keywords[] = { "encoding", "errors", "length", NULL }; |
b6cb8e7d | 370 | |
fbb8f299 PM |
371 | if (!PyArg_ParseTupleAndKeywords (args, kw, "|ssi", keywords, |
372 | &user_encoding, &errors, &length)) | |
b6cb8e7d TJB |
373 | return NULL; |
374 | ||
375 | TRY_CATCH (except, RETURN_MASK_ALL) | |
376 | { | |
96c07c5b | 377 | LA_GET_STRING (value, &buffer, &length, &char_type, &la_encoding); |
b6cb8e7d TJB |
378 | } |
379 | GDB_PY_HANDLE_EXCEPTION (except); | |
380 | ||
381 | encoding = (user_encoding && *user_encoding) ? user_encoding : la_encoding; | |
96c07c5b TT |
382 | unicode = PyUnicode_Decode (buffer, length * TYPE_LENGTH (char_type), |
383 | encoding, errors); | |
b6cb8e7d TJB |
384 | xfree (buffer); |
385 | ||
386 | return unicode; | |
387 | } | |
388 | ||
f9ffd4bb TT |
389 | /* A helper function that implements the various cast operators. */ |
390 | ||
2c74e833 | 391 | static PyObject * |
f9ffd4bb | 392 | valpy_do_cast (PyObject *self, PyObject *args, enum exp_opcode op) |
2c74e833 | 393 | { |
888fe1e1 | 394 | PyObject *type_obj, *result = NULL; |
2c74e833 | 395 | struct type *type; |
2c74e833 TT |
396 | volatile struct gdb_exception except; |
397 | ||
398 | if (! PyArg_ParseTuple (args, "O", &type_obj)) | |
399 | return NULL; | |
400 | ||
401 | type = type_object_to_type (type_obj); | |
402 | if (! type) | |
403 | { | |
044c0f87 PM |
404 | PyErr_SetString (PyExc_RuntimeError, |
405 | _("Argument must be a type.")); | |
2c74e833 TT |
406 | return NULL; |
407 | } | |
408 | ||
409 | TRY_CATCH (except, RETURN_MASK_ALL) | |
410 | { | |
f9ffd4bb | 411 | struct value *val = ((value_object *) self)->value; |
888fe1e1 TT |
412 | struct value *res_val; |
413 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); | |
f9ffd4bb TT |
414 | |
415 | if (op == UNOP_DYNAMIC_CAST) | |
416 | res_val = value_dynamic_cast (type, val); | |
417 | else if (op == UNOP_REINTERPRET_CAST) | |
418 | res_val = value_reinterpret_cast (type, val); | |
419 | else | |
420 | { | |
421 | gdb_assert (op == UNOP_CAST); | |
422 | res_val = value_cast (type, val); | |
423 | } | |
888fe1e1 TT |
424 | |
425 | result = value_to_value_object (res_val); | |
426 | do_cleanups (cleanup); | |
2c74e833 TT |
427 | } |
428 | GDB_PY_HANDLE_EXCEPTION (except); | |
429 | ||
888fe1e1 | 430 | return result; |
2c74e833 TT |
431 | } |
432 | ||
f9ffd4bb TT |
433 | /* Implementation of the "cast" method. */ |
434 | ||
435 | static PyObject * | |
436 | valpy_cast (PyObject *self, PyObject *args) | |
437 | { | |
438 | return valpy_do_cast (self, args, UNOP_CAST); | |
439 | } | |
440 | ||
441 | /* Implementation of the "dynamic_cast" method. */ | |
442 | ||
443 | static PyObject * | |
444 | valpy_dynamic_cast (PyObject *self, PyObject *args) | |
445 | { | |
446 | return valpy_do_cast (self, args, UNOP_DYNAMIC_CAST); | |
447 | } | |
448 | ||
449 | /* Implementation of the "reinterpret_cast" method. */ | |
450 | ||
451 | static PyObject * | |
452 | valpy_reinterpret_cast (PyObject *self, PyObject *args) | |
453 | { | |
454 | return valpy_do_cast (self, args, UNOP_REINTERPRET_CAST); | |
455 | } | |
456 | ||
7843261b TJB |
457 | static Py_ssize_t |
458 | valpy_length (PyObject *self) | |
459 | { | |
460 | /* We don't support getting the number of elements in a struct / class. */ | |
461 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 462 | _("Invalid operation on gdb.Value.")); |
7843261b TJB |
463 | return -1; |
464 | } | |
465 | ||
466 | /* Given string name of an element inside structure, return its value | |
8dc78533 | 467 | object. Returns NULL on error, with a python exception set. */ |
7843261b TJB |
468 | static PyObject * |
469 | valpy_getitem (PyObject *self, PyObject *key) | |
470 | { | |
471 | value_object *self_value = (value_object *) self; | |
08c637de | 472 | char *field = NULL; |
7843261b | 473 | volatile struct gdb_exception except; |
888fe1e1 | 474 | PyObject *result = NULL; |
7843261b | 475 | |
08c637de TJB |
476 | if (gdbpy_is_string (key)) |
477 | { | |
478 | field = python_string_to_host_string (key); | |
479 | if (field == NULL) | |
480 | return NULL; | |
481 | } | |
7843261b TJB |
482 | |
483 | TRY_CATCH (except, RETURN_MASK_ALL) | |
484 | { | |
3c0ed299 | 485 | struct value *tmp = self_value->value; |
888fe1e1 TT |
486 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); |
487 | struct value *res_val = NULL; | |
08c637de TJB |
488 | |
489 | if (field) | |
490 | res_val = value_struct_elt (&tmp, NULL, field, 0, NULL); | |
491 | else | |
492 | { | |
493 | /* Assume we are attempting an array access, and let the | |
494 | value code throw an exception if the index has an invalid | |
495 | type. */ | |
496 | struct value *idx = convert_value_from_python (key); | |
d59b6f6c | 497 | |
570e2b1a | 498 | if (idx != NULL) |
2e4d963f PM |
499 | { |
500 | /* Check the value's type is something that can be accessed via | |
501 | a subscript. */ | |
502 | struct type *type; | |
d59b6f6c | 503 | |
2e4d963f PM |
504 | tmp = coerce_ref (tmp); |
505 | type = check_typedef (value_type (tmp)); | |
506 | if (TYPE_CODE (type) != TYPE_CODE_ARRAY | |
507 | && TYPE_CODE (type) != TYPE_CODE_PTR) | |
e10abd8f | 508 | error (_("Cannot subscript requested type.")); |
2e4d963f PM |
509 | else |
510 | res_val = value_subscript (tmp, value_as_long (idx)); | |
511 | } | |
08c637de | 512 | } |
888fe1e1 TT |
513 | |
514 | if (res_val) | |
515 | result = value_to_value_object (res_val); | |
516 | do_cleanups (cleanup); | |
7843261b | 517 | } |
570e2b1a | 518 | |
06878dd2 | 519 | xfree (field); |
7843261b TJB |
520 | GDB_PY_HANDLE_EXCEPTION (except); |
521 | ||
888fe1e1 | 522 | return result; |
7843261b TJB |
523 | } |
524 | ||
525 | static int | |
526 | valpy_setitem (PyObject *self, PyObject *key, PyObject *value) | |
527 | { | |
528 | PyErr_Format (PyExc_NotImplementedError, | |
529 | _("Setting of struct elements is not currently supported.")); | |
530 | return -1; | |
531 | } | |
532 | ||
5374244e | 533 | /* Called by the Python interpreter to perform an inferior function |
8dc78533 | 534 | call on the value. Returns NULL on error, with a python exception set. */ |
5374244e PM |
535 | static PyObject * |
536 | valpy_call (PyObject *self, PyObject *args, PyObject *keywords) | |
537 | { | |
5374244e PM |
538 | Py_ssize_t args_count; |
539 | volatile struct gdb_exception except; | |
540 | struct value *function = ((value_object *) self)->value; | |
541 | struct value **vargs = NULL; | |
749fd4ea | 542 | struct type *ftype = NULL; |
888fe1e1 TT |
543 | struct value *mark = value_mark (); |
544 | PyObject *result = NULL; | |
f287c1f3 PM |
545 | |
546 | TRY_CATCH (except, RETURN_MASK_ALL) | |
547 | { | |
548 | ftype = check_typedef (value_type (function)); | |
549 | } | |
550 | GDB_PY_HANDLE_EXCEPTION (except); | |
5374244e PM |
551 | |
552 | if (TYPE_CODE (ftype) != TYPE_CODE_FUNC) | |
553 | { | |
554 | PyErr_SetString (PyExc_RuntimeError, | |
555 | _("Value is not callable (not TYPE_CODE_FUNC).")); | |
556 | return NULL; | |
557 | } | |
558 | ||
f287c1f3 PM |
559 | if (! PyTuple_Check (args)) |
560 | { | |
561 | PyErr_SetString (PyExc_TypeError, | |
562 | _("Inferior arguments must be provided in a tuple.")); | |
563 | return NULL; | |
564 | } | |
565 | ||
5374244e PM |
566 | args_count = PyTuple_Size (args); |
567 | if (args_count > 0) | |
568 | { | |
569 | int i; | |
570 | ||
571 | vargs = alloca (sizeof (struct value *) * args_count); | |
572 | for (i = 0; i < args_count; i++) | |
573 | { | |
574 | PyObject *item = PyTuple_GetItem (args, i); | |
575 | ||
576 | if (item == NULL) | |
577 | return NULL; | |
578 | ||
579 | vargs[i] = convert_value_from_python (item); | |
580 | if (vargs[i] == NULL) | |
581 | return NULL; | |
582 | } | |
583 | } | |
584 | ||
585 | TRY_CATCH (except, RETURN_MASK_ALL) | |
586 | { | |
888fe1e1 TT |
587 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (mark); |
588 | struct value *return_value; | |
589 | ||
5374244e | 590 | return_value = call_function_by_hand (function, args_count, vargs); |
888fe1e1 TT |
591 | result = value_to_value_object (return_value); |
592 | do_cleanups (cleanup); | |
5374244e PM |
593 | } |
594 | GDB_PY_HANDLE_EXCEPTION (except); | |
595 | ||
888fe1e1 | 596 | return result; |
5374244e PM |
597 | } |
598 | ||
7843261b TJB |
599 | /* Called by the Python interpreter to obtain string representation |
600 | of the object. */ | |
601 | static PyObject * | |
602 | valpy_str (PyObject *self) | |
603 | { | |
604 | char *s = NULL; | |
7843261b | 605 | PyObject *result; |
79a45b7d | 606 | struct value_print_options opts; |
7843261b TJB |
607 | volatile struct gdb_exception except; |
608 | ||
79a45b7d TT |
609 | get_user_print_options (&opts); |
610 | opts.deref_ref = 0; | |
611 | ||
7843261b TJB |
612 | TRY_CATCH (except, RETURN_MASK_ALL) |
613 | { | |
5fe41fbf TT |
614 | struct ui_file *stb = mem_fileopen (); |
615 | struct cleanup *old_chain = make_cleanup_ui_file_delete (stb); | |
616 | ||
79a45b7d | 617 | common_val_print (((value_object *) self)->value, stb, 0, |
d452c4bc | 618 | &opts, python_language); |
759ef836 | 619 | s = ui_file_xstrdup (stb, NULL); |
5fe41fbf TT |
620 | |
621 | do_cleanups (old_chain); | |
7843261b TJB |
622 | } |
623 | GDB_PY_HANDLE_EXCEPTION (except); | |
624 | ||
7843261b TJB |
625 | result = PyUnicode_Decode (s, strlen (s), host_charset (), NULL); |
626 | xfree (s); | |
627 | ||
628 | return result; | |
629 | } | |
630 | ||
def2b000 TJB |
631 | /* Implements gdb.Value.is_optimized_out. */ |
632 | static PyObject * | |
633 | valpy_get_is_optimized_out (PyObject *self, void *closure) | |
634 | { | |
635 | struct value *value = ((value_object *) self)->value; | |
f287c1f3 PM |
636 | int opt = 0; |
637 | volatile struct gdb_exception except; | |
def2b000 | 638 | |
f287c1f3 PM |
639 | TRY_CATCH (except, RETURN_MASK_ALL) |
640 | { | |
641 | opt = value_optimized_out (value); | |
642 | } | |
643 | GDB_PY_HANDLE_EXCEPTION (except); | |
644 | ||
645 | if (opt) | |
def2b000 TJB |
646 | Py_RETURN_TRUE; |
647 | ||
648 | Py_RETURN_FALSE; | |
649 | } | |
650 | ||
913460fc PK |
651 | /* Implements gdb.Value.is_lazy. */ |
652 | static PyObject * | |
653 | valpy_get_is_lazy (PyObject *self, void *closure) | |
654 | { | |
655 | struct value *value = ((value_object *) self)->value; | |
656 | int opt = 0; | |
657 | volatile struct gdb_exception except; | |
658 | ||
659 | TRY_CATCH (except, RETURN_MASK_ALL) | |
660 | { | |
661 | opt = value_lazy (value); | |
662 | } | |
663 | GDB_PY_HANDLE_EXCEPTION (except); | |
664 | ||
665 | if (opt) | |
666 | Py_RETURN_TRUE; | |
667 | ||
668 | Py_RETURN_FALSE; | |
669 | } | |
670 | ||
671 | /* Implements gdb.Value.fetch_lazy (). */ | |
672 | static PyObject * | |
673 | valpy_fetch_lazy (PyObject *self, PyObject *args) | |
674 | { | |
675 | struct value *value = ((value_object *) self)->value; | |
676 | volatile struct gdb_exception except; | |
677 | ||
678 | TRY_CATCH (except, RETURN_MASK_ALL) | |
679 | { | |
680 | if (value_lazy (value)) | |
681 | value_fetch_lazy (value); | |
682 | } | |
683 | GDB_PY_HANDLE_EXCEPTION (except); | |
684 | ||
685 | Py_RETURN_NONE; | |
686 | } | |
687 | ||
88d4aea7 PM |
688 | /* Calculate and return the address of the PyObject as the value of |
689 | the builtin __hash__ call. */ | |
690 | static long | |
691 | valpy_hash (PyObject *self) | |
692 | { | |
693 | return (long) (intptr_t) self; | |
694 | } | |
695 | ||
7843261b TJB |
696 | enum valpy_opcode |
697 | { | |
698 | VALPY_ADD, | |
699 | VALPY_SUB, | |
700 | VALPY_MUL, | |
701 | VALPY_DIV, | |
702 | VALPY_REM, | |
08c637de TJB |
703 | VALPY_POW, |
704 | VALPY_LSH, | |
705 | VALPY_RSH, | |
706 | VALPY_BITAND, | |
707 | VALPY_BITOR, | |
708 | VALPY_BITXOR | |
7843261b TJB |
709 | }; |
710 | ||
711 | /* If TYPE is a reference, return the target; otherwise return TYPE. */ | |
712 | #define STRIP_REFERENCE(TYPE) \ | |
713 | ((TYPE_CODE (TYPE) == TYPE_CODE_REF) ? (TYPE_TARGET_TYPE (TYPE)) : (TYPE)) | |
714 | ||
715 | /* Returns a value object which is the result of applying the operation | |
8dc78533 JK |
716 | specified by OPCODE to the given arguments. Returns NULL on error, with |
717 | a python exception set. */ | |
7843261b TJB |
718 | static PyObject * |
719 | valpy_binop (enum valpy_opcode opcode, PyObject *self, PyObject *other) | |
720 | { | |
7843261b | 721 | volatile struct gdb_exception except; |
888fe1e1 | 722 | PyObject *result = NULL; |
7843261b TJB |
723 | |
724 | TRY_CATCH (except, RETURN_MASK_ALL) | |
725 | { | |
726 | struct value *arg1, *arg2; | |
888fe1e1 | 727 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); |
0f5b7562 | 728 | struct value *res_val = NULL; |
7843261b TJB |
729 | |
730 | /* If the gdb.Value object is the second operand, then it will be passed | |
731 | to us as the OTHER argument, and SELF will be an entirely different | |
732 | kind of object, altogether. Because of this, we can't assume self is | |
733 | a gdb.Value object and need to convert it from python as well. */ | |
734 | arg1 = convert_value_from_python (self); | |
08c637de | 735 | if (arg1 == NULL) |
cc924cad | 736 | break; |
08c637de | 737 | |
7843261b | 738 | arg2 = convert_value_from_python (other); |
08c637de | 739 | if (arg2 == NULL) |
cc924cad | 740 | break; |
7843261b TJB |
741 | |
742 | switch (opcode) | |
743 | { | |
744 | case VALPY_ADD: | |
745 | { | |
746 | struct type *ltype = value_type (arg1); | |
747 | struct type *rtype = value_type (arg2); | |
748 | ||
749 | CHECK_TYPEDEF (ltype); | |
750 | ltype = STRIP_REFERENCE (ltype); | |
751 | CHECK_TYPEDEF (rtype); | |
752 | rtype = STRIP_REFERENCE (rtype); | |
753 | ||
2497b498 UW |
754 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
755 | && is_integral_type (rtype)) | |
756 | res_val = value_ptradd (arg1, value_as_long (arg2)); | |
757 | else if (TYPE_CODE (rtype) == TYPE_CODE_PTR | |
758 | && is_integral_type (ltype)) | |
759 | res_val = value_ptradd (arg2, value_as_long (arg1)); | |
7843261b TJB |
760 | else |
761 | res_val = value_binop (arg1, arg2, BINOP_ADD); | |
762 | } | |
763 | break; | |
764 | case VALPY_SUB: | |
765 | { | |
766 | struct type *ltype = value_type (arg1); | |
767 | struct type *rtype = value_type (arg2); | |
768 | ||
769 | CHECK_TYPEDEF (ltype); | |
770 | ltype = STRIP_REFERENCE (ltype); | |
771 | CHECK_TYPEDEF (rtype); | |
772 | rtype = STRIP_REFERENCE (rtype); | |
773 | ||
2497b498 UW |
774 | if (TYPE_CODE (ltype) == TYPE_CODE_PTR |
775 | && TYPE_CODE (rtype) == TYPE_CODE_PTR) | |
776 | /* A ptrdiff_t for the target would be preferable here. */ | |
777 | res_val = value_from_longest (builtin_type_pyint, | |
778 | value_ptrdiff (arg1, arg2)); | |
779 | else if (TYPE_CODE (ltype) == TYPE_CODE_PTR | |
780 | && is_integral_type (rtype)) | |
781 | res_val = value_ptradd (arg1, - value_as_long (arg2)); | |
7843261b TJB |
782 | else |
783 | res_val = value_binop (arg1, arg2, BINOP_SUB); | |
784 | } | |
785 | break; | |
786 | case VALPY_MUL: | |
787 | res_val = value_binop (arg1, arg2, BINOP_MUL); | |
788 | break; | |
789 | case VALPY_DIV: | |
790 | res_val = value_binop (arg1, arg2, BINOP_DIV); | |
791 | break; | |
792 | case VALPY_REM: | |
793 | res_val = value_binop (arg1, arg2, BINOP_REM); | |
794 | break; | |
795 | case VALPY_POW: | |
796 | res_val = value_binop (arg1, arg2, BINOP_EXP); | |
797 | break; | |
08c637de TJB |
798 | case VALPY_LSH: |
799 | res_val = value_binop (arg1, arg2, BINOP_LSH); | |
800 | break; | |
801 | case VALPY_RSH: | |
802 | res_val = value_binop (arg1, arg2, BINOP_RSH); | |
803 | break; | |
804 | case VALPY_BITAND: | |
805 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_AND); | |
806 | break; | |
807 | case VALPY_BITOR: | |
808 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_IOR); | |
809 | break; | |
810 | case VALPY_BITXOR: | |
811 | res_val = value_binop (arg1, arg2, BINOP_BITWISE_XOR); | |
812 | break; | |
7843261b | 813 | } |
888fe1e1 TT |
814 | |
815 | if (res_val) | |
816 | result = value_to_value_object (res_val); | |
817 | ||
818 | do_cleanups (cleanup); | |
7843261b TJB |
819 | } |
820 | GDB_PY_HANDLE_EXCEPTION (except); | |
821 | ||
888fe1e1 | 822 | return result; |
7843261b TJB |
823 | } |
824 | ||
825 | static PyObject * | |
826 | valpy_add (PyObject *self, PyObject *other) | |
827 | { | |
828 | return valpy_binop (VALPY_ADD, self, other); | |
829 | } | |
830 | ||
831 | static PyObject * | |
832 | valpy_subtract (PyObject *self, PyObject *other) | |
833 | { | |
834 | return valpy_binop (VALPY_SUB, self, other); | |
835 | } | |
836 | ||
837 | static PyObject * | |
838 | valpy_multiply (PyObject *self, PyObject *other) | |
839 | { | |
840 | return valpy_binop (VALPY_MUL, self, other); | |
841 | } | |
842 | ||
843 | static PyObject * | |
844 | valpy_divide (PyObject *self, PyObject *other) | |
845 | { | |
846 | return valpy_binop (VALPY_DIV, self, other); | |
847 | } | |
848 | ||
849 | static PyObject * | |
850 | valpy_remainder (PyObject *self, PyObject *other) | |
851 | { | |
852 | return valpy_binop (VALPY_REM, self, other); | |
853 | } | |
854 | ||
855 | static PyObject * | |
856 | valpy_power (PyObject *self, PyObject *other, PyObject *unused) | |
857 | { | |
858 | /* We don't support the ternary form of pow. I don't know how to express | |
859 | that, so let's just throw NotImplementedError to at least do something | |
860 | about it. */ | |
861 | if (unused != Py_None) | |
862 | { | |
863 | PyErr_SetString (PyExc_NotImplementedError, | |
864 | "Invalid operation on gdb.Value."); | |
865 | return NULL; | |
866 | } | |
867 | ||
868 | return valpy_binop (VALPY_POW, self, other); | |
869 | } | |
870 | ||
871 | static PyObject * | |
872 | valpy_negative (PyObject *self) | |
873 | { | |
7843261b | 874 | volatile struct gdb_exception except; |
888fe1e1 | 875 | PyObject *result = NULL; |
7843261b TJB |
876 | |
877 | TRY_CATCH (except, RETURN_MASK_ALL) | |
878 | { | |
888fe1e1 TT |
879 | /* Perhaps overkill, but consistency has some virtue. */ |
880 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); | |
881 | struct value *val; | |
882 | ||
7843261b | 883 | val = value_neg (((value_object *) self)->value); |
888fe1e1 TT |
884 | result = value_to_value_object (val); |
885 | do_cleanups (cleanup); | |
7843261b TJB |
886 | } |
887 | GDB_PY_HANDLE_EXCEPTION (except); | |
888 | ||
888fe1e1 | 889 | return result; |
7843261b TJB |
890 | } |
891 | ||
892 | static PyObject * | |
893 | valpy_positive (PyObject *self) | |
894 | { | |
4e7a5ef5 | 895 | return value_to_value_object (((value_object *) self)->value); |
7843261b TJB |
896 | } |
897 | ||
898 | static PyObject * | |
899 | valpy_absolute (PyObject *self) | |
900 | { | |
22601c15 | 901 | struct value *value = ((value_object *) self)->value; |
f287c1f3 PM |
902 | volatile struct gdb_exception except; |
903 | int isabs = 1; | |
d59b6f6c | 904 | |
f287c1f3 PM |
905 | TRY_CATCH (except, RETURN_MASK_ALL) |
906 | { | |
888fe1e1 TT |
907 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ()); |
908 | ||
f287c1f3 PM |
909 | if (value_less (value, value_zero (value_type (value), not_lval))) |
910 | isabs = 0; | |
888fe1e1 TT |
911 | |
912 | do_cleanups (cleanup); | |
f287c1f3 PM |
913 | } |
914 | GDB_PY_HANDLE_EXCEPTION (except); | |
915 | ||
916 | if (isabs) | |
7843261b | 917 | return valpy_positive (self); |
f287c1f3 PM |
918 | else |
919 | return valpy_negative (self); | |
7843261b TJB |
920 | } |
921 | ||
922 | /* Implements boolean evaluation of gdb.Value. */ | |
923 | static int | |
924 | valpy_nonzero (PyObject *self) | |
925 | { | |
f287c1f3 | 926 | volatile struct gdb_exception except; |
7843261b TJB |
927 | value_object *self_value = (value_object *) self; |
928 | struct type *type; | |
f287c1f3 | 929 | int nonzero = 0; /* Appease GCC warning. */ |
7843261b | 930 | |
f287c1f3 PM |
931 | TRY_CATCH (except, RETURN_MASK_ALL) |
932 | { | |
5d9c5995 PM |
933 | type = check_typedef (value_type (self_value->value)); |
934 | ||
f287c1f3 PM |
935 | if (is_integral_type (type) || TYPE_CODE (type) == TYPE_CODE_PTR) |
936 | nonzero = !!value_as_long (self_value->value); | |
937 | else if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
938 | nonzero = value_as_double (self_value->value) != 0; | |
939 | else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
940 | nonzero = !decimal_is_zero (value_contents (self_value->value), | |
941 | TYPE_LENGTH (type), | |
942 | gdbarch_byte_order (get_type_arch (type))); | |
943 | else | |
944 | /* All other values are True. */ | |
945 | nonzero = 1; | |
946 | } | |
947 | /* This is not documented in the Python documentation, but if this | |
948 | function fails, return -1 as slot_nb_nonzero does (the default | |
949 | Python nonzero function). */ | |
950 | GDB_PY_SET_HANDLE_EXCEPTION (except); | |
951 | ||
952 | return nonzero; | |
7843261b TJB |
953 | } |
954 | ||
08c637de | 955 | /* Implements ~ for value objects. */ |
7843261b | 956 | static PyObject * |
08c637de | 957 | valpy_invert (PyObject *self) |
7843261b | 958 | { |
08c637de | 959 | struct value *val = NULL; |
7843261b TJB |
960 | volatile struct gdb_exception except; |
961 | ||
08c637de | 962 | TRY_CATCH (except, RETURN_MASK_ALL) |
7843261b | 963 | { |
08c637de TJB |
964 | val = value_complement (((value_object *) self)->value); |
965 | } | |
966 | GDB_PY_HANDLE_EXCEPTION (except); | |
7843261b | 967 | |
08c637de TJB |
968 | return value_to_value_object (val); |
969 | } | |
7843261b | 970 | |
08c637de TJB |
971 | /* Implements left shift for value objects. */ |
972 | static PyObject * | |
973 | valpy_lsh (PyObject *self, PyObject *other) | |
974 | { | |
975 | return valpy_binop (VALPY_LSH, self, other); | |
976 | } | |
7843261b | 977 | |
08c637de TJB |
978 | /* Implements right shift for value objects. */ |
979 | static PyObject * | |
980 | valpy_rsh (PyObject *self, PyObject *other) | |
981 | { | |
982 | return valpy_binop (VALPY_RSH, self, other); | |
983 | } | |
7843261b | 984 | |
08c637de TJB |
985 | /* Implements bitwise and for value objects. */ |
986 | static PyObject * | |
987 | valpy_and (PyObject *self, PyObject *other) | |
988 | { | |
989 | return valpy_binop (VALPY_BITAND, self, other); | |
990 | } | |
7843261b | 991 | |
08c637de TJB |
992 | /* Implements bitwise or for value objects. */ |
993 | static PyObject * | |
994 | valpy_or (PyObject *self, PyObject *other) | |
995 | { | |
996 | return valpy_binop (VALPY_BITOR, self, other); | |
997 | } | |
998 | ||
999 | /* Implements bitwise xor for value objects. */ | |
1000 | static PyObject * | |
1001 | valpy_xor (PyObject *self, PyObject *other) | |
1002 | { | |
1003 | return valpy_binop (VALPY_BITXOR, self, other); | |
1004 | } | |
1005 | ||
8dc78533 JK |
1006 | /* Implements comparison operations for value objects. Returns NULL on error, |
1007 | with a python exception set. */ | |
08c637de TJB |
1008 | static PyObject * |
1009 | valpy_richcompare (PyObject *self, PyObject *other, int op) | |
1010 | { | |
1011 | int result = 0; | |
08c637de TJB |
1012 | volatile struct gdb_exception except; |
1013 | ||
1014 | if (other == Py_None) | |
7843261b TJB |
1015 | /* Comparing with None is special. From what I can tell, in Python |
1016 | None is smaller than anything else. */ | |
1017 | switch (op) { | |
1018 | case Py_LT: | |
1019 | case Py_LE: | |
1020 | case Py_EQ: | |
1021 | Py_RETURN_FALSE; | |
1022 | case Py_NE: | |
1023 | case Py_GT: | |
1024 | case Py_GE: | |
1025 | Py_RETURN_TRUE; | |
1026 | default: | |
1027 | /* Can't happen. */ | |
1028 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 1029 | _("Invalid operation on gdb.Value.")); |
7843261b TJB |
1030 | return NULL; |
1031 | } | |
7843261b TJB |
1032 | |
1033 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1034 | { | |
888fe1e1 TT |
1035 | struct value *value_other, *mark = value_mark (); |
1036 | struct cleanup *cleanup; | |
1037 | ||
08c637de TJB |
1038 | value_other = convert_value_from_python (other); |
1039 | if (value_other == NULL) | |
f02779d8 TT |
1040 | { |
1041 | result = -1; | |
1042 | break; | |
1043 | } | |
08c637de | 1044 | |
888fe1e1 TT |
1045 | cleanup = make_cleanup_value_free_to_mark (mark); |
1046 | ||
7843261b TJB |
1047 | switch (op) { |
1048 | case Py_LT: | |
1049 | result = value_less (((value_object *) self)->value, value_other); | |
1050 | break; | |
1051 | case Py_LE: | |
1052 | result = value_less (((value_object *) self)->value, value_other) | |
1053 | || value_equal (((value_object *) self)->value, value_other); | |
1054 | break; | |
1055 | case Py_EQ: | |
1056 | result = value_equal (((value_object *) self)->value, value_other); | |
1057 | break; | |
1058 | case Py_NE: | |
1059 | result = !value_equal (((value_object *) self)->value, value_other); | |
1060 | break; | |
1061 | case Py_GT: | |
1062 | result = value_less (value_other, ((value_object *) self)->value); | |
1063 | break; | |
1064 | case Py_GE: | |
1065 | result = value_less (value_other, ((value_object *) self)->value) | |
1066 | || value_equal (((value_object *) self)->value, value_other); | |
1067 | break; | |
1068 | default: | |
1069 | /* Can't happen. */ | |
1070 | PyErr_SetString (PyExc_NotImplementedError, | |
044c0f87 | 1071 | _("Invalid operation on gdb.Value.")); |
f02779d8 TT |
1072 | result = -1; |
1073 | break; | |
7843261b | 1074 | } |
888fe1e1 TT |
1075 | |
1076 | do_cleanups (cleanup); | |
7843261b TJB |
1077 | } |
1078 | GDB_PY_HANDLE_EXCEPTION (except); | |
1079 | ||
f02779d8 TT |
1080 | /* In this case, the Python exception has already been set. */ |
1081 | if (result < 0) | |
1082 | return NULL; | |
1083 | ||
7843261b TJB |
1084 | if (result == 1) |
1085 | Py_RETURN_TRUE; | |
1086 | ||
1087 | Py_RETURN_FALSE; | |
1088 | } | |
1089 | ||
08c637de TJB |
1090 | /* Helper function to determine if a type is "int-like". */ |
1091 | static int | |
1092 | is_intlike (struct type *type, int ptr_ok) | |
1093 | { | |
08c637de TJB |
1094 | return (TYPE_CODE (type) == TYPE_CODE_INT |
1095 | || TYPE_CODE (type) == TYPE_CODE_ENUM | |
1096 | || TYPE_CODE (type) == TYPE_CODE_BOOL | |
1097 | || TYPE_CODE (type) == TYPE_CODE_CHAR | |
1098 | || (ptr_ok && TYPE_CODE (type) == TYPE_CODE_PTR)); | |
1099 | } | |
1100 | ||
1101 | /* Implements conversion to int. */ | |
1102 | static PyObject * | |
1103 | valpy_int (PyObject *self) | |
1104 | { | |
1105 | struct value *value = ((value_object *) self)->value; | |
1106 | struct type *type = value_type (value); | |
1107 | LONGEST l = 0; | |
1108 | volatile struct gdb_exception except; | |
1109 | ||
08c637de TJB |
1110 | TRY_CATCH (except, RETURN_MASK_ALL) |
1111 | { | |
f287c1f3 PM |
1112 | CHECK_TYPEDEF (type); |
1113 | if (!is_intlike (type, 0)) | |
1114 | error (_("Cannot convert value to int.")); | |
1115 | ||
08c637de TJB |
1116 | l = value_as_long (value); |
1117 | } | |
1118 | GDB_PY_HANDLE_EXCEPTION (except); | |
1119 | ||
74aedc46 | 1120 | return gdb_py_object_from_longest (l); |
08c637de TJB |
1121 | } |
1122 | ||
1123 | /* Implements conversion to long. */ | |
1124 | static PyObject * | |
1125 | valpy_long (PyObject *self) | |
1126 | { | |
1127 | struct value *value = ((value_object *) self)->value; | |
1128 | struct type *type = value_type (value); | |
1129 | LONGEST l = 0; | |
1130 | volatile struct gdb_exception except; | |
1131 | ||
08c637de TJB |
1132 | TRY_CATCH (except, RETURN_MASK_ALL) |
1133 | { | |
f287c1f3 PM |
1134 | CHECK_TYPEDEF (type); |
1135 | ||
1136 | if (!is_intlike (type, 1)) | |
1137 | error (_("Cannot convert value to long.")); | |
1138 | ||
08c637de TJB |
1139 | l = value_as_long (value); |
1140 | } | |
1141 | GDB_PY_HANDLE_EXCEPTION (except); | |
1142 | ||
74aedc46 | 1143 | return gdb_py_long_from_longest (l); |
08c637de TJB |
1144 | } |
1145 | ||
1146 | /* Implements conversion to float. */ | |
1147 | static PyObject * | |
1148 | valpy_float (PyObject *self) | |
1149 | { | |
1150 | struct value *value = ((value_object *) self)->value; | |
1151 | struct type *type = value_type (value); | |
1152 | double d = 0; | |
1153 | volatile struct gdb_exception except; | |
1154 | ||
08c637de TJB |
1155 | TRY_CATCH (except, RETURN_MASK_ALL) |
1156 | { | |
f287c1f3 PM |
1157 | CHECK_TYPEDEF (type); |
1158 | ||
1159 | if (TYPE_CODE (type) != TYPE_CODE_FLT) | |
1160 | error (_("Cannot convert value to float.")); | |
1161 | ||
08c637de TJB |
1162 | d = value_as_double (value); |
1163 | } | |
1164 | GDB_PY_HANDLE_EXCEPTION (except); | |
1165 | ||
1166 | return PyFloat_FromDouble (d); | |
1167 | } | |
1168 | ||
7843261b TJB |
1169 | /* Returns an object for a value which is released from the all_values chain, |
1170 | so its lifetime is not bound to the execution of a command. */ | |
1171 | PyObject * | |
1172 | value_to_value_object (struct value *val) | |
1173 | { | |
1174 | value_object *val_obj; | |
1175 | ||
1176 | val_obj = PyObject_New (value_object, &value_object_type); | |
1177 | if (val_obj != NULL) | |
1178 | { | |
1179 | val_obj->value = val; | |
e848a8a5 | 1180 | release_value_or_incref (val); |
c0c6f777 | 1181 | val_obj->address = NULL; |
2c74e833 | 1182 | val_obj->type = NULL; |
03f17ccf | 1183 | val_obj->dynamic_type = NULL; |
4e7a5ef5 | 1184 | note_value (val_obj); |
7843261b TJB |
1185 | } |
1186 | ||
1187 | return (PyObject *) val_obj; | |
1188 | } | |
1189 | ||
4e7a5ef5 TT |
1190 | /* Returns a borrowed reference to the struct value corresponding to |
1191 | the given value object. */ | |
a6bac58e TT |
1192 | struct value * |
1193 | value_object_to_value (PyObject *self) | |
1194 | { | |
1195 | value_object *real; | |
d59b6f6c | 1196 | |
a6bac58e TT |
1197 | if (! PyObject_TypeCheck (self, &value_object_type)) |
1198 | return NULL; | |
1199 | real = (value_object *) self; | |
1200 | return real->value; | |
1201 | } | |
1202 | ||
7843261b | 1203 | /* Try to convert a Python value to a gdb value. If the value cannot |
4e7a5ef5 TT |
1204 | be converted, set a Python exception and return NULL. Returns a |
1205 | reference to a new value on the all_values chain. */ | |
7843261b TJB |
1206 | |
1207 | struct value * | |
1208 | convert_value_from_python (PyObject *obj) | |
1209 | { | |
1210 | struct value *value = NULL; /* -Wall */ | |
7843261b | 1211 | struct cleanup *old; |
08c637de TJB |
1212 | volatile struct gdb_exception except; |
1213 | int cmp; | |
7843261b | 1214 | |
08c637de | 1215 | gdb_assert (obj != NULL); |
7843261b | 1216 | |
08c637de | 1217 | TRY_CATCH (except, RETURN_MASK_ALL) |
7843261b | 1218 | { |
08c637de TJB |
1219 | if (PyBool_Check (obj)) |
1220 | { | |
1221 | cmp = PyObject_IsTrue (obj); | |
1222 | if (cmp >= 0) | |
1223 | value = value_from_longest (builtin_type_pybool, cmp); | |
1224 | } | |
1225 | else if (PyInt_Check (obj)) | |
1226 | { | |
1227 | long l = PyInt_AsLong (obj); | |
7843261b | 1228 | |
08c637de TJB |
1229 | if (! PyErr_Occurred ()) |
1230 | value = value_from_longest (builtin_type_pyint, l); | |
1231 | } | |
1232 | else if (PyLong_Check (obj)) | |
1233 | { | |
1234 | LONGEST l = PyLong_AsLongLong (obj); | |
7843261b | 1235 | |
595939de PM |
1236 | if (PyErr_Occurred ()) |
1237 | { | |
1238 | /* If the error was an overflow, we can try converting to | |
1239 | ULONGEST instead. */ | |
1240 | if (PyErr_ExceptionMatches (PyExc_OverflowError)) | |
1241 | { | |
1242 | PyObject *etype, *evalue, *etraceback, *zero; | |
1243 | ||
1244 | PyErr_Fetch (&etype, &evalue, &etraceback); | |
1245 | zero = PyInt_FromLong (0); | |
1246 | ||
1247 | /* Check whether obj is positive. */ | |
1248 | if (PyObject_RichCompareBool (obj, zero, Py_GT) > 0) | |
1249 | { | |
1250 | ULONGEST ul; | |
1251 | ||
1252 | ul = PyLong_AsUnsignedLongLong (obj); | |
1253 | if (! PyErr_Occurred ()) | |
1254 | value = value_from_ulongest (builtin_type_upylong, ul); | |
1255 | } | |
1256 | else | |
1257 | /* There's nothing we can do. */ | |
1258 | PyErr_Restore (etype, evalue, etraceback); | |
1259 | ||
1260 | Py_DECREF (zero); | |
1261 | } | |
1262 | } | |
1263 | else | |
08c637de TJB |
1264 | value = value_from_longest (builtin_type_pylong, l); |
1265 | } | |
1266 | else if (PyFloat_Check (obj)) | |
1267 | { | |
1268 | double d = PyFloat_AsDouble (obj); | |
7843261b | 1269 | |
08c637de TJB |
1270 | if (! PyErr_Occurred ()) |
1271 | value = value_from_double (builtin_type_pyfloat, d); | |
1272 | } | |
1273 | else if (gdbpy_is_string (obj)) | |
1274 | { | |
1275 | char *s; | |
1276 | ||
1277 | s = python_string_to_target_string (obj); | |
1278 | if (s != NULL) | |
1279 | { | |
1280 | old = make_cleanup (xfree, s); | |
3b7538c0 | 1281 | value = value_cstring (s, strlen (s), builtin_type_pychar); |
08c637de TJB |
1282 | do_cleanups (old); |
1283 | } | |
1284 | } | |
1285 | else if (PyObject_TypeCheck (obj, &value_object_type)) | |
cc924cad | 1286 | value = value_copy (((value_object *) obj)->value); |
be759fcf PM |
1287 | else if (gdbpy_is_lazy_string (obj)) |
1288 | { | |
1289 | PyObject *result; | |
d59b6f6c | 1290 | |
fb6a3ed3 | 1291 | result = PyObject_CallMethodObjArgs (obj, gdbpy_value_cst, NULL); |
be759fcf PM |
1292 | value = value_copy (((value_object *) result)->value); |
1293 | } | |
08c637de | 1294 | else |
9a2b4c1b MS |
1295 | PyErr_Format (PyExc_TypeError, |
1296 | _("Could not convert Python object: %s."), | |
08c637de TJB |
1297 | PyString_AsString (PyObject_Str (obj))); |
1298 | } | |
1299 | if (except.reason < 0) | |
1300 | { | |
1301 | PyErr_Format (except.reason == RETURN_QUIT | |
1302 | ? PyExc_KeyboardInterrupt : PyExc_RuntimeError, | |
1303 | "%s", except.message); | |
1304 | return NULL; | |
1305 | } | |
7843261b TJB |
1306 | |
1307 | return value; | |
1308 | } | |
1309 | ||
1310 | /* Returns value object in the ARGth position in GDB's history. */ | |
1311 | PyObject * | |
08c637de | 1312 | gdbpy_history (PyObject *self, PyObject *args) |
7843261b TJB |
1313 | { |
1314 | int i; | |
1315 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
1316 | volatile struct gdb_exception except; | |
1317 | ||
1318 | if (!PyArg_ParseTuple (args, "i", &i)) | |
1319 | return NULL; | |
1320 | ||
1321 | TRY_CATCH (except, RETURN_MASK_ALL) | |
1322 | { | |
1323 | res_val = access_value_history (i); | |
1324 | } | |
1325 | GDB_PY_HANDLE_EXCEPTION (except); | |
1326 | ||
1327 | return value_to_value_object (res_val); | |
1328 | } | |
1329 | ||
595939de PM |
1330 | /* Returns 1 in OBJ is a gdb.Value object, 0 otherwise. */ |
1331 | ||
1332 | int | |
1333 | gdbpy_is_value_object (PyObject *obj) | |
1334 | { | |
1335 | return PyObject_TypeCheck (obj, &value_object_type); | |
1336 | } | |
1337 | ||
7843261b TJB |
1338 | void |
1339 | gdbpy_initialize_values (void) | |
1340 | { | |
7843261b TJB |
1341 | if (PyType_Ready (&value_object_type) < 0) |
1342 | return; | |
1343 | ||
1344 | Py_INCREF (&value_object_type); | |
1345 | PyModule_AddObject (gdb_module, "Value", (PyObject *) &value_object_type); | |
1346 | ||
1347 | values_in_python = NULL; | |
1348 | } | |
1349 | ||
2c74e833 TT |
1350 | \f |
1351 | ||
def2b000 | 1352 | static PyGetSetDef value_object_getset[] = { |
c0c6f777 TJB |
1353 | { "address", valpy_get_address, NULL, "The address of the value.", |
1354 | NULL }, | |
def2b000 | 1355 | { "is_optimized_out", valpy_get_is_optimized_out, NULL, |
9a2b4c1b MS |
1356 | "Boolean telling whether the value is optimized " |
1357 | "out (i.e., not available).", | |
def2b000 | 1358 | NULL }, |
2c74e833 | 1359 | { "type", valpy_get_type, NULL, "Type of the value.", NULL }, |
03f17ccf TT |
1360 | { "dynamic_type", valpy_get_dynamic_type, NULL, |
1361 | "Dynamic type of the value.", NULL }, | |
913460fc PK |
1362 | { "is_lazy", valpy_get_is_lazy, NULL, |
1363 | "Boolean telling whether the value is lazy (not fetched yet\n\ | |
1364 | from the inferior). A lazy value is fetched when needed, or when\n\ | |
1365 | the \"fetch_lazy()\" method is called.", NULL }, | |
def2b000 TJB |
1366 | {NULL} /* Sentinel */ |
1367 | }; | |
1368 | ||
f9176c46 | 1369 | static PyMethodDef value_object_methods[] = { |
2c74e833 | 1370 | { "cast", valpy_cast, METH_VARARGS, "Cast the value to the supplied type." }, |
f9ffd4bb TT |
1371 | { "dynamic_cast", valpy_dynamic_cast, METH_VARARGS, |
1372 | "dynamic_cast (gdb.Type) -> gdb.Value\n\ | |
1373 | Cast the value to the supplied type, as if by the C++ dynamic_cast operator." | |
1374 | }, | |
1375 | { "reinterpret_cast", valpy_reinterpret_cast, METH_VARARGS, | |
1376 | "reinterpret_cast (gdb.Type) -> gdb.Value\n\ | |
1377 | Cast the value to the supplied type, as if by the C++\n\ | |
1378 | reinterpret_cast operator." | |
1379 | }, | |
f9176c46 | 1380 | { "dereference", valpy_dereference, METH_NOARGS, "Dereferences the value." }, |
9a2b4c1b MS |
1381 | { "lazy_string", (PyCFunction) valpy_lazy_string, |
1382 | METH_VARARGS | METH_KEYWORDS, | |
be759fcf PM |
1383 | "lazy_string ([encoding] [, length]) -> lazy_string\n\ |
1384 | Return a lazy string representation of the value." }, | |
cc924cad | 1385 | { "string", (PyCFunction) valpy_string, METH_VARARGS | METH_KEYWORDS, |
fbb8f299 | 1386 | "string ([encoding] [, errors] [, length]) -> string\n\ |
cc924cad | 1387 | Return Unicode string representation of the value." }, |
913460fc PK |
1388 | { "fetch_lazy", valpy_fetch_lazy, METH_NOARGS, |
1389 | "Fetches the value from the inferior, if it was lazy." }, | |
f9176c46 PA |
1390 | {NULL} /* Sentinel */ |
1391 | }; | |
1392 | ||
1393 | static PyNumberMethods value_object_as_number = { | |
1394 | valpy_add, | |
1395 | valpy_subtract, | |
1396 | valpy_multiply, | |
1397 | valpy_divide, | |
1398 | valpy_remainder, | |
1399 | NULL, /* nb_divmod */ | |
1400 | valpy_power, /* nb_power */ | |
1401 | valpy_negative, /* nb_negative */ | |
1402 | valpy_positive, /* nb_positive */ | |
1403 | valpy_absolute, /* nb_absolute */ | |
08c637de TJB |
1404 | valpy_nonzero, /* nb_nonzero */ |
1405 | valpy_invert, /* nb_invert */ | |
1406 | valpy_lsh, /* nb_lshift */ | |
1407 | valpy_rsh, /* nb_rshift */ | |
1408 | valpy_and, /* nb_and */ | |
1409 | valpy_xor, /* nb_xor */ | |
1410 | valpy_or, /* nb_or */ | |
1411 | NULL, /* nb_coerce */ | |
1412 | valpy_int, /* nb_int */ | |
1413 | valpy_long, /* nb_long */ | |
1414 | valpy_float, /* nb_float */ | |
1415 | NULL, /* nb_oct */ | |
1416 | NULL /* nb_hex */ | |
f9176c46 PA |
1417 | }; |
1418 | ||
1419 | static PyMappingMethods value_object_as_mapping = { | |
1420 | valpy_length, | |
1421 | valpy_getitem, | |
1422 | valpy_setitem | |
1423 | }; | |
1424 | ||
1425 | PyTypeObject value_object_type = { | |
1426 | PyObject_HEAD_INIT (NULL) | |
1427 | 0, /*ob_size*/ | |
1428 | "gdb.Value", /*tp_name*/ | |
1429 | sizeof (value_object), /*tp_basicsize*/ | |
1430 | 0, /*tp_itemsize*/ | |
1431 | valpy_dealloc, /*tp_dealloc*/ | |
1432 | 0, /*tp_print*/ | |
1433 | 0, /*tp_getattr*/ | |
1434 | 0, /*tp_setattr*/ | |
1435 | 0, /*tp_compare*/ | |
1436 | 0, /*tp_repr*/ | |
1437 | &value_object_as_number, /*tp_as_number*/ | |
1438 | 0, /*tp_as_sequence*/ | |
1439 | &value_object_as_mapping, /*tp_as_mapping*/ | |
88d4aea7 | 1440 | valpy_hash, /*tp_hash*/ |
5374244e | 1441 | valpy_call, /*tp_call*/ |
f9176c46 PA |
1442 | valpy_str, /*tp_str*/ |
1443 | 0, /*tp_getattro*/ | |
1444 | 0, /*tp_setattro*/ | |
1445 | 0, /*tp_as_buffer*/ | |
9a2b4c1b MS |
1446 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
1447 | | Py_TPFLAGS_BASETYPE, /*tp_flags*/ | |
f9176c46 PA |
1448 | "GDB value object", /* tp_doc */ |
1449 | 0, /* tp_traverse */ | |
1450 | 0, /* tp_clear */ | |
1451 | valpy_richcompare, /* tp_richcompare */ | |
1452 | 0, /* tp_weaklistoffset */ | |
1453 | 0, /* tp_iter */ | |
1454 | 0, /* tp_iternext */ | |
08c637de TJB |
1455 | value_object_methods, /* tp_methods */ |
1456 | 0, /* tp_members */ | |
def2b000 | 1457 | value_object_getset, /* tp_getset */ |
08c637de TJB |
1458 | 0, /* tp_base */ |
1459 | 0, /* tp_dict */ | |
1460 | 0, /* tp_descr_get */ | |
1461 | 0, /* tp_descr_set */ | |
1462 | 0, /* tp_dictoffset */ | |
1463 | 0, /* tp_init */ | |
1464 | 0, /* tp_alloc */ | |
1465 | valpy_new /* tp_new */ | |
f9176c46 PA |
1466 | }; |
1467 | ||
4e7a5ef5 TT |
1468 | #else |
1469 | ||
1470 | void | |
1471 | preserve_python_values (struct objfile *objfile, htab_t copied_types) | |
1472 | { | |
1473 | /* Nothing. */ | |
1474 | } | |
1475 | ||
7843261b | 1476 | #endif /* HAVE_PYTHON */ |