| 1 | /* Python interface to inferiors. |
| 2 | |
| 3 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "gdbcore.h" |
| 22 | #include "gdbthread.h" |
| 23 | #include "inferior.h" |
| 24 | #include "objfiles.h" |
| 25 | #include "observable.h" |
| 26 | #include "python-internal.h" |
| 27 | #include "arch-utils.h" |
| 28 | #include "language.h" |
| 29 | #include "gdbsupport/gdb_signals.h" |
| 30 | #include "py-event.h" |
| 31 | #include "py-stopevent.h" |
| 32 | |
| 33 | struct threadlist_entry |
| 34 | { |
| 35 | threadlist_entry (gdbpy_ref<thread_object> &&ref) |
| 36 | : thread_obj (std::move (ref)) |
| 37 | { |
| 38 | } |
| 39 | |
| 40 | gdbpy_ref<thread_object> thread_obj; |
| 41 | struct threadlist_entry *next; |
| 42 | }; |
| 43 | |
| 44 | struct inferior_object |
| 45 | { |
| 46 | PyObject_HEAD |
| 47 | |
| 48 | /* The inferior we represent. */ |
| 49 | struct inferior *inferior; |
| 50 | |
| 51 | /* thread_object instances under this inferior. This list owns a |
| 52 | reference to each object it contains. */ |
| 53 | struct threadlist_entry *threads; |
| 54 | |
| 55 | /* Number of threads in the list. */ |
| 56 | int nthreads; |
| 57 | }; |
| 58 | |
| 59 | extern PyTypeObject inferior_object_type |
| 60 | CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("inferior_object"); |
| 61 | |
| 62 | static const struct inferior_data *infpy_inf_data_key; |
| 63 | |
| 64 | typedef struct { |
| 65 | PyObject_HEAD |
| 66 | void *buffer; |
| 67 | |
| 68 | /* These are kept just for mbpy_str. */ |
| 69 | CORE_ADDR addr; |
| 70 | CORE_ADDR length; |
| 71 | } membuf_object; |
| 72 | |
| 73 | extern PyTypeObject membuf_object_type |
| 74 | CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("membuf_object"); |
| 75 | |
| 76 | /* Require that INFERIOR be a valid inferior ID. */ |
| 77 | #define INFPY_REQUIRE_VALID(Inferior) \ |
| 78 | do { \ |
| 79 | if (!Inferior->inferior) \ |
| 80 | { \ |
| 81 | PyErr_SetString (PyExc_RuntimeError, \ |
| 82 | _("Inferior no longer exists.")); \ |
| 83 | return NULL; \ |
| 84 | } \ |
| 85 | } while (0) |
| 86 | |
| 87 | static void |
| 88 | python_on_normal_stop (struct bpstats *bs, int print_frame) |
| 89 | { |
| 90 | enum gdb_signal stop_signal; |
| 91 | |
| 92 | if (!gdb_python_initialized) |
| 93 | return; |
| 94 | |
| 95 | if (inferior_ptid == null_ptid) |
| 96 | return; |
| 97 | |
| 98 | stop_signal = inferior_thread ()->suspend.stop_signal; |
| 99 | |
| 100 | gdbpy_enter enter_py (get_current_arch (), current_language); |
| 101 | |
| 102 | if (emit_stop_event (bs, stop_signal) < 0) |
| 103 | gdbpy_print_stack (); |
| 104 | } |
| 105 | |
| 106 | static void |
| 107 | python_on_resume (ptid_t ptid) |
| 108 | { |
| 109 | if (!gdb_python_initialized) |
| 110 | return; |
| 111 | |
| 112 | gdbpy_enter enter_py (target_gdbarch (), current_language); |
| 113 | |
| 114 | if (emit_continue_event (ptid) < 0) |
| 115 | gdbpy_print_stack (); |
| 116 | } |
| 117 | |
| 118 | /* Callback, registered as an observer, that notifies Python listeners |
| 119 | when an inferior function call is about to be made. */ |
| 120 | |
| 121 | static void |
| 122 | python_on_inferior_call_pre (ptid_t thread, CORE_ADDR address) |
| 123 | { |
| 124 | gdbpy_enter enter_py (target_gdbarch (), current_language); |
| 125 | |
| 126 | if (emit_inferior_call_event (INFERIOR_CALL_PRE, thread, address) < 0) |
| 127 | gdbpy_print_stack (); |
| 128 | } |
| 129 | |
| 130 | /* Callback, registered as an observer, that notifies Python listeners |
| 131 | when an inferior function call has completed. */ |
| 132 | |
| 133 | static void |
| 134 | python_on_inferior_call_post (ptid_t thread, CORE_ADDR address) |
| 135 | { |
| 136 | gdbpy_enter enter_py (target_gdbarch (), current_language); |
| 137 | |
| 138 | if (emit_inferior_call_event (INFERIOR_CALL_POST, thread, address) < 0) |
| 139 | gdbpy_print_stack (); |
| 140 | } |
| 141 | |
| 142 | /* Callback, registered as an observer, that notifies Python listeners |
| 143 | when a part of memory has been modified by user action (eg via a |
| 144 | 'set' command). */ |
| 145 | |
| 146 | static void |
| 147 | python_on_memory_change (struct inferior *inferior, CORE_ADDR addr, ssize_t len, const bfd_byte *data) |
| 148 | { |
| 149 | gdbpy_enter enter_py (target_gdbarch (), current_language); |
| 150 | |
| 151 | if (emit_memory_changed_event (addr, len) < 0) |
| 152 | gdbpy_print_stack (); |
| 153 | } |
| 154 | |
| 155 | /* Callback, registered as an observer, that notifies Python listeners |
| 156 | when a register has been modified by user action (eg via a 'set' |
| 157 | command). */ |
| 158 | |
| 159 | static void |
| 160 | python_on_register_change (struct frame_info *frame, int regnum) |
| 161 | { |
| 162 | gdbpy_enter enter_py (target_gdbarch (), current_language); |
| 163 | |
| 164 | if (emit_register_changed_event (frame, regnum) < 0) |
| 165 | gdbpy_print_stack (); |
| 166 | } |
| 167 | |
| 168 | static void |
| 169 | python_inferior_exit (struct inferior *inf) |
| 170 | { |
| 171 | const LONGEST *exit_code = NULL; |
| 172 | |
| 173 | if (!gdb_python_initialized) |
| 174 | return; |
| 175 | |
| 176 | gdbpy_enter enter_py (target_gdbarch (), current_language); |
| 177 | |
| 178 | if (inf->has_exit_code) |
| 179 | exit_code = &inf->exit_code; |
| 180 | |
| 181 | if (emit_exited_event (exit_code, inf) < 0) |
| 182 | gdbpy_print_stack (); |
| 183 | } |
| 184 | |
| 185 | /* Callback used to notify Python listeners about new objfiles loaded in the |
| 186 | inferior. OBJFILE may be NULL which means that the objfile list has been |
| 187 | cleared (emptied). */ |
| 188 | |
| 189 | static void |
| 190 | python_new_objfile (struct objfile *objfile) |
| 191 | { |
| 192 | if (!gdb_python_initialized) |
| 193 | return; |
| 194 | |
| 195 | gdbpy_enter enter_py (objfile != NULL |
| 196 | ? get_objfile_arch (objfile) |
| 197 | : target_gdbarch (), |
| 198 | current_language); |
| 199 | |
| 200 | if (objfile == NULL) |
| 201 | { |
| 202 | if (emit_clear_objfiles_event () < 0) |
| 203 | gdbpy_print_stack (); |
| 204 | } |
| 205 | else |
| 206 | { |
| 207 | if (emit_new_objfile_event (objfile) < 0) |
| 208 | gdbpy_print_stack (); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | /* Return a reference to the Python object of type Inferior |
| 213 | representing INFERIOR. If the object has already been created, |
| 214 | return it and increment the reference count, otherwise, create it. |
| 215 | Return NULL on failure. */ |
| 216 | |
| 217 | gdbpy_ref<inferior_object> |
| 218 | inferior_to_inferior_object (struct inferior *inferior) |
| 219 | { |
| 220 | inferior_object *inf_obj; |
| 221 | |
| 222 | inf_obj = (inferior_object *) inferior_data (inferior, infpy_inf_data_key); |
| 223 | if (!inf_obj) |
| 224 | { |
| 225 | inf_obj = PyObject_New (inferior_object, &inferior_object_type); |
| 226 | if (!inf_obj) |
| 227 | return NULL; |
| 228 | |
| 229 | inf_obj->inferior = inferior; |
| 230 | inf_obj->threads = NULL; |
| 231 | inf_obj->nthreads = 0; |
| 232 | |
| 233 | /* PyObject_New initializes the new object with a refcount of 1. This |
| 234 | counts for the reference we are keeping in the inferior data. */ |
| 235 | set_inferior_data (inferior, infpy_inf_data_key, inf_obj); |
| 236 | } |
| 237 | |
| 238 | /* We are returning a new reference. */ |
| 239 | gdb_assert (inf_obj != nullptr); |
| 240 | return gdbpy_ref<inferior_object>::new_reference (inf_obj); |
| 241 | } |
| 242 | |
| 243 | /* Called when a new inferior is created. Notifies any Python event |
| 244 | listeners. */ |
| 245 | static void |
| 246 | python_new_inferior (struct inferior *inf) |
| 247 | { |
| 248 | if (!gdb_python_initialized) |
| 249 | return; |
| 250 | |
| 251 | gdbpy_enter enter_py (python_gdbarch, python_language); |
| 252 | |
| 253 | if (evregpy_no_listeners_p (gdb_py_events.new_inferior)) |
| 254 | return; |
| 255 | |
| 256 | gdbpy_ref<inferior_object> inf_obj = inferior_to_inferior_object (inf); |
| 257 | if (inf_obj == NULL) |
| 258 | { |
| 259 | gdbpy_print_stack (); |
| 260 | return; |
| 261 | } |
| 262 | |
| 263 | gdbpy_ref<> event = create_event_object (&new_inferior_event_object_type); |
| 264 | if (event == NULL |
| 265 | || evpy_add_attribute (event.get (), "inferior", |
| 266 | (PyObject *) inf_obj.get ()) < 0 |
| 267 | || evpy_emit_event (event.get (), gdb_py_events.new_inferior) < 0) |
| 268 | gdbpy_print_stack (); |
| 269 | } |
| 270 | |
| 271 | /* Called when an inferior is removed. Notifies any Python event |
| 272 | listeners. */ |
| 273 | static void |
| 274 | python_inferior_deleted (struct inferior *inf) |
| 275 | { |
| 276 | if (!gdb_python_initialized) |
| 277 | return; |
| 278 | |
| 279 | gdbpy_enter enter_py (python_gdbarch, python_language); |
| 280 | |
| 281 | if (evregpy_no_listeners_p (gdb_py_events.inferior_deleted)) |
| 282 | return; |
| 283 | |
| 284 | gdbpy_ref<inferior_object> inf_obj = inferior_to_inferior_object (inf); |
| 285 | if (inf_obj == NULL) |
| 286 | { |
| 287 | gdbpy_print_stack (); |
| 288 | return; |
| 289 | } |
| 290 | |
| 291 | gdbpy_ref<> event = create_event_object (&inferior_deleted_event_object_type); |
| 292 | if (event == NULL |
| 293 | || evpy_add_attribute (event.get (), "inferior", |
| 294 | (PyObject *) inf_obj.get ()) < 0 |
| 295 | || evpy_emit_event (event.get (), gdb_py_events.inferior_deleted) < 0) |
| 296 | gdbpy_print_stack (); |
| 297 | } |
| 298 | |
| 299 | gdbpy_ref<> |
| 300 | thread_to_thread_object (thread_info *thr) |
| 301 | { |
| 302 | gdbpy_ref<inferior_object> inf_obj = inferior_to_inferior_object (thr->inf); |
| 303 | if (inf_obj == NULL) |
| 304 | return NULL; |
| 305 | |
| 306 | for (threadlist_entry *thread = inf_obj->threads; |
| 307 | thread != NULL; |
| 308 | thread = thread->next) |
| 309 | if (thread->thread_obj->thread == thr) |
| 310 | return gdbpy_ref<>::new_reference ((PyObject *) thread->thread_obj.get ()); |
| 311 | |
| 312 | PyErr_SetString (PyExc_SystemError, |
| 313 | _("could not find gdb thread object")); |
| 314 | return NULL; |
| 315 | } |
| 316 | |
| 317 | static void |
| 318 | add_thread_object (struct thread_info *tp) |
| 319 | { |
| 320 | inferior_object *inf_obj; |
| 321 | struct threadlist_entry *entry; |
| 322 | |
| 323 | if (!gdb_python_initialized) |
| 324 | return; |
| 325 | |
| 326 | gdbpy_enter enter_py (python_gdbarch, python_language); |
| 327 | |
| 328 | gdbpy_ref<thread_object> thread_obj = create_thread_object (tp); |
| 329 | if (thread_obj == NULL) |
| 330 | { |
| 331 | gdbpy_print_stack (); |
| 332 | return; |
| 333 | } |
| 334 | |
| 335 | inf_obj = (inferior_object *) thread_obj->inf_obj; |
| 336 | |
| 337 | entry = new threadlist_entry (std::move (thread_obj)); |
| 338 | entry->next = inf_obj->threads; |
| 339 | |
| 340 | inf_obj->threads = entry; |
| 341 | inf_obj->nthreads++; |
| 342 | |
| 343 | if (evregpy_no_listeners_p (gdb_py_events.new_thread)) |
| 344 | return; |
| 345 | |
| 346 | gdbpy_ref<> event = create_thread_event_object (&new_thread_event_object_type, |
| 347 | (PyObject *) inf_obj); |
| 348 | if (event == NULL |
| 349 | || evpy_emit_event (event.get (), gdb_py_events.new_thread) < 0) |
| 350 | gdbpy_print_stack (); |
| 351 | } |
| 352 | |
| 353 | static void |
| 354 | delete_thread_object (struct thread_info *tp, int ignore) |
| 355 | { |
| 356 | struct threadlist_entry **entry, *tmp; |
| 357 | |
| 358 | if (!gdb_python_initialized) |
| 359 | return; |
| 360 | |
| 361 | gdbpy_enter enter_py (python_gdbarch, python_language); |
| 362 | |
| 363 | gdbpy_ref<inferior_object> inf_obj = inferior_to_inferior_object (tp->inf); |
| 364 | if (inf_obj == NULL) |
| 365 | return; |
| 366 | |
| 367 | /* Find thread entry in its inferior's thread_list. */ |
| 368 | for (entry = &inf_obj->threads; *entry != NULL; entry = |
| 369 | &(*entry)->next) |
| 370 | if ((*entry)->thread_obj->thread == tp) |
| 371 | break; |
| 372 | |
| 373 | if (!*entry) |
| 374 | return; |
| 375 | |
| 376 | tmp = *entry; |
| 377 | tmp->thread_obj->thread = NULL; |
| 378 | |
| 379 | *entry = (*entry)->next; |
| 380 | inf_obj->nthreads--; |
| 381 | |
| 382 | delete tmp; |
| 383 | } |
| 384 | |
| 385 | static PyObject * |
| 386 | infpy_threads (PyObject *self, PyObject *args) |
| 387 | { |
| 388 | int i; |
| 389 | struct threadlist_entry *entry; |
| 390 | inferior_object *inf_obj = (inferior_object *) self; |
| 391 | PyObject *tuple; |
| 392 | |
| 393 | INFPY_REQUIRE_VALID (inf_obj); |
| 394 | |
| 395 | try |
| 396 | { |
| 397 | update_thread_list (); |
| 398 | } |
| 399 | catch (const gdb_exception &except) |
| 400 | { |
| 401 | GDB_PY_HANDLE_EXCEPTION (except); |
| 402 | } |
| 403 | |
| 404 | tuple = PyTuple_New (inf_obj->nthreads); |
| 405 | if (!tuple) |
| 406 | return NULL; |
| 407 | |
| 408 | for (i = 0, entry = inf_obj->threads; i < inf_obj->nthreads; |
| 409 | i++, entry = entry->next) |
| 410 | { |
| 411 | PyObject *thr = (PyObject *) entry->thread_obj.get (); |
| 412 | Py_INCREF (thr); |
| 413 | PyTuple_SET_ITEM (tuple, i, thr); |
| 414 | } |
| 415 | |
| 416 | return tuple; |
| 417 | } |
| 418 | |
| 419 | static PyObject * |
| 420 | infpy_get_num (PyObject *self, void *closure) |
| 421 | { |
| 422 | inferior_object *inf = (inferior_object *) self; |
| 423 | |
| 424 | INFPY_REQUIRE_VALID (inf); |
| 425 | |
| 426 | return PyLong_FromLong (inf->inferior->num); |
| 427 | } |
| 428 | |
| 429 | static PyObject * |
| 430 | infpy_get_pid (PyObject *self, void *closure) |
| 431 | { |
| 432 | inferior_object *inf = (inferior_object *) self; |
| 433 | |
| 434 | INFPY_REQUIRE_VALID (inf); |
| 435 | |
| 436 | return PyLong_FromLong (inf->inferior->pid); |
| 437 | } |
| 438 | |
| 439 | static PyObject * |
| 440 | infpy_get_was_attached (PyObject *self, void *closure) |
| 441 | { |
| 442 | inferior_object *inf = (inferior_object *) self; |
| 443 | |
| 444 | INFPY_REQUIRE_VALID (inf); |
| 445 | if (inf->inferior->attach_flag) |
| 446 | Py_RETURN_TRUE; |
| 447 | Py_RETURN_FALSE; |
| 448 | } |
| 449 | |
| 450 | /* Getter of gdb.Inferior.progspace. */ |
| 451 | |
| 452 | static PyObject * |
| 453 | infpy_get_progspace (PyObject *self, void *closure) |
| 454 | { |
| 455 | inferior_object *inf = (inferior_object *) self; |
| 456 | |
| 457 | INFPY_REQUIRE_VALID (inf); |
| 458 | |
| 459 | program_space *pspace = inf->inferior->pspace; |
| 460 | gdb_assert (pspace != nullptr); |
| 461 | |
| 462 | return pspace_to_pspace_object (pspace).release (); |
| 463 | } |
| 464 | |
| 465 | /* Implementation of gdb.inferiors () -> (gdb.Inferior, ...). |
| 466 | Returns a tuple of all inferiors. */ |
| 467 | PyObject * |
| 468 | gdbpy_inferiors (PyObject *unused, PyObject *unused2) |
| 469 | { |
| 470 | gdbpy_ref<> list (PyList_New (0)); |
| 471 | if (list == NULL) |
| 472 | return NULL; |
| 473 | |
| 474 | for (inferior *inf : all_inferiors ()) |
| 475 | { |
| 476 | gdbpy_ref<inferior_object> inferior = inferior_to_inferior_object (inf); |
| 477 | |
| 478 | if (inferior == NULL) |
| 479 | continue; |
| 480 | |
| 481 | if (PyList_Append (list.get (), (PyObject *) inferior.get ()) != 0) |
| 482 | return NULL; |
| 483 | } |
| 484 | |
| 485 | return PyList_AsTuple (list.get ()); |
| 486 | } |
| 487 | |
| 488 | /* Membuf and memory manipulation. */ |
| 489 | |
| 490 | /* Implementation of Inferior.read_memory (address, length). |
| 491 | Returns a Python buffer object with LENGTH bytes of the inferior's |
| 492 | memory at ADDRESS. Both arguments are integers. Returns NULL on error, |
| 493 | with a python exception set. */ |
| 494 | static PyObject * |
| 495 | infpy_read_memory (PyObject *self, PyObject *args, PyObject *kw) |
| 496 | { |
| 497 | CORE_ADDR addr, length; |
| 498 | gdb::unique_xmalloc_ptr<gdb_byte> buffer; |
| 499 | PyObject *addr_obj, *length_obj, *result; |
| 500 | static const char *keywords[] = { "address", "length", NULL }; |
| 501 | |
| 502 | if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "OO", keywords, |
| 503 | &addr_obj, &length_obj)) |
| 504 | return NULL; |
| 505 | |
| 506 | if (get_addr_from_python (addr_obj, &addr) < 0 |
| 507 | || get_addr_from_python (length_obj, &length) < 0) |
| 508 | return NULL; |
| 509 | |
| 510 | try |
| 511 | { |
| 512 | buffer.reset ((gdb_byte *) xmalloc (length)); |
| 513 | |
| 514 | read_memory (addr, buffer.get (), length); |
| 515 | } |
| 516 | catch (const gdb_exception &except) |
| 517 | { |
| 518 | GDB_PY_HANDLE_EXCEPTION (except); |
| 519 | } |
| 520 | |
| 521 | gdbpy_ref<membuf_object> membuf_obj (PyObject_New (membuf_object, |
| 522 | &membuf_object_type)); |
| 523 | if (membuf_obj == NULL) |
| 524 | return NULL; |
| 525 | |
| 526 | membuf_obj->buffer = buffer.release (); |
| 527 | membuf_obj->addr = addr; |
| 528 | membuf_obj->length = length; |
| 529 | |
| 530 | #ifdef IS_PY3K |
| 531 | result = PyMemoryView_FromObject ((PyObject *) membuf_obj.get ()); |
| 532 | #else |
| 533 | result = PyBuffer_FromReadWriteObject ((PyObject *) membuf_obj.get (), 0, |
| 534 | Py_END_OF_BUFFER); |
| 535 | #endif |
| 536 | |
| 537 | return result; |
| 538 | } |
| 539 | |
| 540 | /* Implementation of Inferior.write_memory (address, buffer [, length]). |
| 541 | Writes the contents of BUFFER (a Python object supporting the read |
| 542 | buffer protocol) at ADDRESS in the inferior's memory. Write LENGTH |
| 543 | bytes from BUFFER, or its entire contents if the argument is not |
| 544 | provided. The function returns nothing. Returns NULL on error, with |
| 545 | a python exception set. */ |
| 546 | static PyObject * |
| 547 | infpy_write_memory (PyObject *self, PyObject *args, PyObject *kw) |
| 548 | { |
| 549 | struct gdb_exception except; |
| 550 | Py_ssize_t buf_len; |
| 551 | const gdb_byte *buffer; |
| 552 | CORE_ADDR addr, length; |
| 553 | PyObject *addr_obj, *length_obj = NULL; |
| 554 | static const char *keywords[] = { "address", "buffer", "length", NULL }; |
| 555 | Py_buffer pybuf; |
| 556 | |
| 557 | if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "Os*|O", keywords, |
| 558 | &addr_obj, &pybuf, &length_obj)) |
| 559 | return NULL; |
| 560 | |
| 561 | Py_buffer_up buffer_up (&pybuf); |
| 562 | buffer = (const gdb_byte *) pybuf.buf; |
| 563 | buf_len = pybuf.len; |
| 564 | |
| 565 | if (get_addr_from_python (addr_obj, &addr) < 0) |
| 566 | return nullptr; |
| 567 | |
| 568 | if (!length_obj) |
| 569 | length = buf_len; |
| 570 | else if (get_addr_from_python (length_obj, &length) < 0) |
| 571 | return nullptr; |
| 572 | |
| 573 | try |
| 574 | { |
| 575 | write_memory_with_notification (addr, buffer, length); |
| 576 | } |
| 577 | catch (gdb_exception &ex) |
| 578 | { |
| 579 | except = std::move (ex); |
| 580 | } |
| 581 | |
| 582 | GDB_PY_HANDLE_EXCEPTION (except); |
| 583 | |
| 584 | Py_RETURN_NONE; |
| 585 | } |
| 586 | |
| 587 | /* Destructor of Membuf objects. */ |
| 588 | static void |
| 589 | mbpy_dealloc (PyObject *self) |
| 590 | { |
| 591 | xfree (((membuf_object *) self)->buffer); |
| 592 | Py_TYPE (self)->tp_free (self); |
| 593 | } |
| 594 | |
| 595 | /* Return a description of the Membuf object. */ |
| 596 | static PyObject * |
| 597 | mbpy_str (PyObject *self) |
| 598 | { |
| 599 | membuf_object *membuf_obj = (membuf_object *) self; |
| 600 | |
| 601 | return PyString_FromFormat (_("Memory buffer for address %s, \ |
| 602 | which is %s bytes long."), |
| 603 | paddress (python_gdbarch, membuf_obj->addr), |
| 604 | pulongest (membuf_obj->length)); |
| 605 | } |
| 606 | |
| 607 | #ifdef IS_PY3K |
| 608 | |
| 609 | static int |
| 610 | get_buffer (PyObject *self, Py_buffer *buf, int flags) |
| 611 | { |
| 612 | membuf_object *membuf_obj = (membuf_object *) self; |
| 613 | int ret; |
| 614 | |
| 615 | ret = PyBuffer_FillInfo (buf, self, membuf_obj->buffer, |
| 616 | membuf_obj->length, 0, |
| 617 | PyBUF_CONTIG); |
| 618 | |
| 619 | /* Despite the documentation saying this field is a "const char *", |
| 620 | in Python 3.4 at least, it's really a "char *". */ |
| 621 | buf->format = (char *) "c"; |
| 622 | |
| 623 | return ret; |
| 624 | } |
| 625 | |
| 626 | #else |
| 627 | |
| 628 | static Py_ssize_t |
| 629 | get_read_buffer (PyObject *self, Py_ssize_t segment, void **ptrptr) |
| 630 | { |
| 631 | membuf_object *membuf_obj = (membuf_object *) self; |
| 632 | |
| 633 | if (segment) |
| 634 | { |
| 635 | PyErr_SetString (PyExc_SystemError, |
| 636 | _("The memory buffer supports only one segment.")); |
| 637 | return -1; |
| 638 | } |
| 639 | |
| 640 | *ptrptr = membuf_obj->buffer; |
| 641 | |
| 642 | return membuf_obj->length; |
| 643 | } |
| 644 | |
| 645 | static Py_ssize_t |
| 646 | get_write_buffer (PyObject *self, Py_ssize_t segment, void **ptrptr) |
| 647 | { |
| 648 | return get_read_buffer (self, segment, ptrptr); |
| 649 | } |
| 650 | |
| 651 | static Py_ssize_t |
| 652 | get_seg_count (PyObject *self, Py_ssize_t *lenp) |
| 653 | { |
| 654 | if (lenp) |
| 655 | *lenp = ((membuf_object *) self)->length; |
| 656 | |
| 657 | return 1; |
| 658 | } |
| 659 | |
| 660 | static Py_ssize_t |
| 661 | get_char_buffer (PyObject *self, Py_ssize_t segment, char **ptrptr) |
| 662 | { |
| 663 | void *ptr = NULL; |
| 664 | Py_ssize_t ret; |
| 665 | |
| 666 | ret = get_read_buffer (self, segment, &ptr); |
| 667 | *ptrptr = (char *) ptr; |
| 668 | |
| 669 | return ret; |
| 670 | } |
| 671 | |
| 672 | #endif /* IS_PY3K */ |
| 673 | |
| 674 | /* Implementation of |
| 675 | gdb.search_memory (address, length, pattern). ADDRESS is the |
| 676 | address to start the search. LENGTH specifies the scope of the |
| 677 | search from ADDRESS. PATTERN is the pattern to search for (and |
| 678 | must be a Python object supporting the buffer protocol). |
| 679 | Returns a Python Long object holding the address where the pattern |
| 680 | was located, or if the pattern was not found, returns None. Returns NULL |
| 681 | on error, with a python exception set. */ |
| 682 | static PyObject * |
| 683 | infpy_search_memory (PyObject *self, PyObject *args, PyObject *kw) |
| 684 | { |
| 685 | struct gdb_exception except; |
| 686 | CORE_ADDR start_addr, length; |
| 687 | static const char *keywords[] = { "address", "length", "pattern", NULL }; |
| 688 | PyObject *start_addr_obj, *length_obj; |
| 689 | Py_ssize_t pattern_size; |
| 690 | const gdb_byte *buffer; |
| 691 | CORE_ADDR found_addr; |
| 692 | int found = 0; |
| 693 | Py_buffer pybuf; |
| 694 | |
| 695 | if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "OOs*", keywords, |
| 696 | &start_addr_obj, &length_obj, |
| 697 | &pybuf)) |
| 698 | return NULL; |
| 699 | |
| 700 | Py_buffer_up buffer_up (&pybuf); |
| 701 | buffer = (const gdb_byte *) pybuf.buf; |
| 702 | pattern_size = pybuf.len; |
| 703 | |
| 704 | if (get_addr_from_python (start_addr_obj, &start_addr) < 0) |
| 705 | return nullptr; |
| 706 | |
| 707 | if (get_addr_from_python (length_obj, &length) < 0) |
| 708 | return nullptr; |
| 709 | |
| 710 | if (!length) |
| 711 | { |
| 712 | PyErr_SetString (PyExc_ValueError, |
| 713 | _("Search range is empty.")); |
| 714 | return nullptr; |
| 715 | } |
| 716 | /* Watch for overflows. */ |
| 717 | else if (length > CORE_ADDR_MAX |
| 718 | || (start_addr + length - 1) < start_addr) |
| 719 | { |
| 720 | PyErr_SetString (PyExc_ValueError, |
| 721 | _("The search range is too large.")); |
| 722 | return nullptr; |
| 723 | } |
| 724 | |
| 725 | try |
| 726 | { |
| 727 | found = target_search_memory (start_addr, length, |
| 728 | buffer, pattern_size, |
| 729 | &found_addr); |
| 730 | } |
| 731 | catch (gdb_exception &ex) |
| 732 | { |
| 733 | except = std::move (ex); |
| 734 | } |
| 735 | |
| 736 | GDB_PY_HANDLE_EXCEPTION (except); |
| 737 | |
| 738 | if (found) |
| 739 | return PyLong_FromLong (found_addr); |
| 740 | else |
| 741 | Py_RETURN_NONE; |
| 742 | } |
| 743 | |
| 744 | /* Implementation of gdb.Inferior.is_valid (self) -> Boolean. |
| 745 | Returns True if this inferior object still exists in GDB. */ |
| 746 | |
| 747 | static PyObject * |
| 748 | infpy_is_valid (PyObject *self, PyObject *args) |
| 749 | { |
| 750 | inferior_object *inf = (inferior_object *) self; |
| 751 | |
| 752 | if (! inf->inferior) |
| 753 | Py_RETURN_FALSE; |
| 754 | |
| 755 | Py_RETURN_TRUE; |
| 756 | } |
| 757 | |
| 758 | /* Implementation of gdb.Inferior.thread_from_handle (self, handle) |
| 759 | -> gdb.InferiorThread. */ |
| 760 | |
| 761 | static PyObject * |
| 762 | infpy_thread_from_thread_handle (PyObject *self, PyObject *args, PyObject *kw) |
| 763 | { |
| 764 | PyObject *handle_obj; |
| 765 | inferior_object *inf_obj = (inferior_object *) self; |
| 766 | static const char *keywords[] = { "handle", NULL }; |
| 767 | |
| 768 | INFPY_REQUIRE_VALID (inf_obj); |
| 769 | |
| 770 | if (! gdb_PyArg_ParseTupleAndKeywords (args, kw, "O", keywords, &handle_obj)) |
| 771 | return NULL; |
| 772 | |
| 773 | const gdb_byte *bytes; |
| 774 | size_t bytes_len; |
| 775 | Py_buffer_up buffer_up; |
| 776 | Py_buffer py_buf; |
| 777 | |
| 778 | if (PyObject_CheckBuffer (handle_obj) |
| 779 | && PyObject_GetBuffer (handle_obj, &py_buf, PyBUF_SIMPLE) == 0) |
| 780 | { |
| 781 | buffer_up.reset (&py_buf); |
| 782 | bytes = (const gdb_byte *) py_buf.buf; |
| 783 | bytes_len = py_buf.len; |
| 784 | } |
| 785 | else if (gdbpy_is_value_object (handle_obj)) |
| 786 | { |
| 787 | struct value *val = value_object_to_value (handle_obj); |
| 788 | bytes = value_contents_all (val); |
| 789 | bytes_len = TYPE_LENGTH (value_type (val)); |
| 790 | } |
| 791 | else |
| 792 | { |
| 793 | PyErr_SetString (PyExc_TypeError, |
| 794 | _("Argument 'handle' must be a thread handle object.")); |
| 795 | |
| 796 | return NULL; |
| 797 | } |
| 798 | |
| 799 | try |
| 800 | { |
| 801 | struct thread_info *thread_info; |
| 802 | |
| 803 | thread_info = find_thread_by_handle |
| 804 | (gdb::array_view<const gdb_byte> (bytes, bytes_len), |
| 805 | inf_obj->inferior); |
| 806 | if (thread_info != NULL) |
| 807 | return thread_to_thread_object (thread_info).release (); |
| 808 | } |
| 809 | catch (const gdb_exception &except) |
| 810 | { |
| 811 | GDB_PY_HANDLE_EXCEPTION (except); |
| 812 | } |
| 813 | |
| 814 | Py_RETURN_NONE; |
| 815 | } |
| 816 | |
| 817 | /* Implementation of gdb.Inferior.architecture. */ |
| 818 | |
| 819 | static PyObject * |
| 820 | infpy_architecture (PyObject *self, PyObject *args) |
| 821 | { |
| 822 | inferior_object *inf = (inferior_object *) self; |
| 823 | |
| 824 | INFPY_REQUIRE_VALID (inf); |
| 825 | |
| 826 | return gdbarch_to_arch_object (inf->inferior->gdbarch); |
| 827 | } |
| 828 | |
| 829 | /* Implement repr() for gdb.Inferior. */ |
| 830 | |
| 831 | static PyObject * |
| 832 | infpy_repr (PyObject *obj) |
| 833 | { |
| 834 | inferior_object *self = (inferior_object *) obj; |
| 835 | inferior *inf = self->inferior; |
| 836 | |
| 837 | if (inf == nullptr) |
| 838 | return PyString_FromString ("<gdb.Inferior (invalid)>"); |
| 839 | |
| 840 | return PyString_FromFormat ("<gdb.Inferior num=%d, pid=%d>", |
| 841 | inf->num, inf->pid); |
| 842 | } |
| 843 | |
| 844 | |
| 845 | static void |
| 846 | infpy_dealloc (PyObject *obj) |
| 847 | { |
| 848 | inferior_object *inf_obj = (inferior_object *) obj; |
| 849 | struct inferior *inf = inf_obj->inferior; |
| 850 | |
| 851 | if (! inf) |
| 852 | return; |
| 853 | |
| 854 | set_inferior_data (inf, infpy_inf_data_key, NULL); |
| 855 | Py_TYPE (obj)->tp_free (obj); |
| 856 | } |
| 857 | |
| 858 | /* Clear the INFERIOR pointer in an Inferior object and clear the |
| 859 | thread list. */ |
| 860 | static void |
| 861 | py_free_inferior (struct inferior *inf, void *datum) |
| 862 | { |
| 863 | struct threadlist_entry *th_entry, *th_tmp; |
| 864 | |
| 865 | if (!gdb_python_initialized) |
| 866 | return; |
| 867 | |
| 868 | gdbpy_enter enter_py (python_gdbarch, python_language); |
| 869 | gdbpy_ref<inferior_object> inf_obj ((inferior_object *) datum); |
| 870 | |
| 871 | inf_obj->inferior = NULL; |
| 872 | |
| 873 | /* Deallocate threads list. */ |
| 874 | for (th_entry = inf_obj->threads; th_entry != NULL;) |
| 875 | { |
| 876 | th_tmp = th_entry; |
| 877 | th_entry = th_entry->next; |
| 878 | delete th_tmp; |
| 879 | } |
| 880 | |
| 881 | inf_obj->nthreads = 0; |
| 882 | } |
| 883 | |
| 884 | /* Implementation of gdb.selected_inferior() -> gdb.Inferior. |
| 885 | Returns the current inferior object. */ |
| 886 | |
| 887 | PyObject * |
| 888 | gdbpy_selected_inferior (PyObject *self, PyObject *args) |
| 889 | { |
| 890 | return ((PyObject *) |
| 891 | inferior_to_inferior_object (current_inferior ()).release ()); |
| 892 | } |
| 893 | |
| 894 | int |
| 895 | gdbpy_initialize_inferior (void) |
| 896 | { |
| 897 | if (PyType_Ready (&inferior_object_type) < 0) |
| 898 | return -1; |
| 899 | |
| 900 | if (gdb_pymodule_addobject (gdb_module, "Inferior", |
| 901 | (PyObject *) &inferior_object_type) < 0) |
| 902 | return -1; |
| 903 | |
| 904 | infpy_inf_data_key = |
| 905 | register_inferior_data_with_cleanup (NULL, py_free_inferior); |
| 906 | |
| 907 | gdb::observers::new_thread.attach (add_thread_object); |
| 908 | gdb::observers::thread_exit.attach (delete_thread_object); |
| 909 | gdb::observers::normal_stop.attach (python_on_normal_stop); |
| 910 | gdb::observers::target_resumed.attach (python_on_resume); |
| 911 | gdb::observers::inferior_call_pre.attach (python_on_inferior_call_pre); |
| 912 | gdb::observers::inferior_call_post.attach (python_on_inferior_call_post); |
| 913 | gdb::observers::memory_changed.attach (python_on_memory_change); |
| 914 | gdb::observers::register_changed.attach (python_on_register_change); |
| 915 | gdb::observers::inferior_exit.attach (python_inferior_exit); |
| 916 | gdb::observers::new_objfile.attach (python_new_objfile); |
| 917 | gdb::observers::inferior_added.attach (python_new_inferior); |
| 918 | gdb::observers::inferior_removed.attach (python_inferior_deleted); |
| 919 | |
| 920 | membuf_object_type.tp_new = PyType_GenericNew; |
| 921 | if (PyType_Ready (&membuf_object_type) < 0) |
| 922 | return -1; |
| 923 | |
| 924 | return gdb_pymodule_addobject (gdb_module, "Membuf", |
| 925 | (PyObject *) &membuf_object_type); |
| 926 | } |
| 927 | |
| 928 | static gdb_PyGetSetDef inferior_object_getset[] = |
| 929 | { |
| 930 | { "num", infpy_get_num, NULL, "ID of inferior, as assigned by GDB.", NULL }, |
| 931 | { "pid", infpy_get_pid, NULL, "PID of inferior, as assigned by the OS.", |
| 932 | NULL }, |
| 933 | { "was_attached", infpy_get_was_attached, NULL, |
| 934 | "True if the inferior was created using 'attach'.", NULL }, |
| 935 | { "progspace", infpy_get_progspace, NULL, "Program space of this inferior" }, |
| 936 | { NULL } |
| 937 | }; |
| 938 | |
| 939 | static PyMethodDef inferior_object_methods[] = |
| 940 | { |
| 941 | { "is_valid", infpy_is_valid, METH_NOARGS, |
| 942 | "is_valid () -> Boolean.\n\ |
| 943 | Return true if this inferior is valid, false if not." }, |
| 944 | { "threads", infpy_threads, METH_NOARGS, |
| 945 | "Return all the threads of this inferior." }, |
| 946 | { "read_memory", (PyCFunction) infpy_read_memory, |
| 947 | METH_VARARGS | METH_KEYWORDS, |
| 948 | "read_memory (address, length) -> buffer\n\ |
| 949 | Return a buffer object for reading from the inferior's memory." }, |
| 950 | { "write_memory", (PyCFunction) infpy_write_memory, |
| 951 | METH_VARARGS | METH_KEYWORDS, |
| 952 | "write_memory (address, buffer [, length])\n\ |
| 953 | Write the given buffer object to the inferior's memory." }, |
| 954 | { "search_memory", (PyCFunction) infpy_search_memory, |
| 955 | METH_VARARGS | METH_KEYWORDS, |
| 956 | "search_memory (address, length, pattern) -> long\n\ |
| 957 | Return a long with the address of a match, or None." }, |
| 958 | /* thread_from_thread_handle is deprecated. */ |
| 959 | { "thread_from_thread_handle", (PyCFunction) infpy_thread_from_thread_handle, |
| 960 | METH_VARARGS | METH_KEYWORDS, |
| 961 | "thread_from_thread_handle (handle) -> gdb.InferiorThread.\n\ |
| 962 | Return thread object corresponding to thread handle.\n\ |
| 963 | This method is deprecated - use thread_from_handle instead." }, |
| 964 | { "thread_from_handle", (PyCFunction) infpy_thread_from_thread_handle, |
| 965 | METH_VARARGS | METH_KEYWORDS, |
| 966 | "thread_from_handle (handle) -> gdb.InferiorThread.\n\ |
| 967 | Return thread object corresponding to thread handle." }, |
| 968 | { "architecture", (PyCFunction) infpy_architecture, METH_NOARGS, |
| 969 | "architecture () -> gdb.Architecture\n\ |
| 970 | Return architecture of this inferior." }, |
| 971 | { NULL } |
| 972 | }; |
| 973 | |
| 974 | PyTypeObject inferior_object_type = |
| 975 | { |
| 976 | PyVarObject_HEAD_INIT (NULL, 0) |
| 977 | "gdb.Inferior", /* tp_name */ |
| 978 | sizeof (inferior_object), /* tp_basicsize */ |
| 979 | 0, /* tp_itemsize */ |
| 980 | infpy_dealloc, /* tp_dealloc */ |
| 981 | 0, /* tp_print */ |
| 982 | 0, /* tp_getattr */ |
| 983 | 0, /* tp_setattr */ |
| 984 | 0, /* tp_compare */ |
| 985 | infpy_repr, /* tp_repr */ |
| 986 | 0, /* tp_as_number */ |
| 987 | 0, /* tp_as_sequence */ |
| 988 | 0, /* tp_as_mapping */ |
| 989 | 0, /* tp_hash */ |
| 990 | 0, /* tp_call */ |
| 991 | 0, /* tp_str */ |
| 992 | 0, /* tp_getattro */ |
| 993 | 0, /* tp_setattro */ |
| 994 | 0, /* tp_as_buffer */ |
| 995 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER, /* tp_flags */ |
| 996 | "GDB inferior object", /* tp_doc */ |
| 997 | 0, /* tp_traverse */ |
| 998 | 0, /* tp_clear */ |
| 999 | 0, /* tp_richcompare */ |
| 1000 | 0, /* tp_weaklistoffset */ |
| 1001 | 0, /* tp_iter */ |
| 1002 | 0, /* tp_iternext */ |
| 1003 | inferior_object_methods, /* tp_methods */ |
| 1004 | 0, /* tp_members */ |
| 1005 | inferior_object_getset, /* tp_getset */ |
| 1006 | 0, /* tp_base */ |
| 1007 | 0, /* tp_dict */ |
| 1008 | 0, /* tp_descr_get */ |
| 1009 | 0, /* tp_descr_set */ |
| 1010 | 0, /* tp_dictoffset */ |
| 1011 | 0, /* tp_init */ |
| 1012 | 0 /* tp_alloc */ |
| 1013 | }; |
| 1014 | |
| 1015 | #ifdef IS_PY3K |
| 1016 | |
| 1017 | static PyBufferProcs buffer_procs = |
| 1018 | { |
| 1019 | get_buffer |
| 1020 | }; |
| 1021 | |
| 1022 | #else |
| 1023 | |
| 1024 | static PyBufferProcs buffer_procs = { |
| 1025 | get_read_buffer, |
| 1026 | get_write_buffer, |
| 1027 | get_seg_count, |
| 1028 | get_char_buffer |
| 1029 | }; |
| 1030 | #endif /* IS_PY3K */ |
| 1031 | |
| 1032 | PyTypeObject membuf_object_type = { |
| 1033 | PyVarObject_HEAD_INIT (NULL, 0) |
| 1034 | "gdb.Membuf", /*tp_name*/ |
| 1035 | sizeof (membuf_object), /*tp_basicsize*/ |
| 1036 | 0, /*tp_itemsize*/ |
| 1037 | mbpy_dealloc, /*tp_dealloc*/ |
| 1038 | 0, /*tp_print*/ |
| 1039 | 0, /*tp_getattr*/ |
| 1040 | 0, /*tp_setattr*/ |
| 1041 | 0, /*tp_compare*/ |
| 1042 | 0, /*tp_repr*/ |
| 1043 | 0, /*tp_as_number*/ |
| 1044 | 0, /*tp_as_sequence*/ |
| 1045 | 0, /*tp_as_mapping*/ |
| 1046 | 0, /*tp_hash */ |
| 1047 | 0, /*tp_call*/ |
| 1048 | mbpy_str, /*tp_str*/ |
| 1049 | 0, /*tp_getattro*/ |
| 1050 | 0, /*tp_setattro*/ |
| 1051 | &buffer_procs, /*tp_as_buffer*/ |
| 1052 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
| 1053 | "GDB memory buffer object", /*tp_doc*/ |
| 1054 | 0, /* tp_traverse */ |
| 1055 | 0, /* tp_clear */ |
| 1056 | 0, /* tp_richcompare */ |
| 1057 | 0, /* tp_weaklistoffset */ |
| 1058 | 0, /* tp_iter */ |
| 1059 | 0, /* tp_iternext */ |
| 1060 | 0, /* tp_methods */ |
| 1061 | 0, /* tp_members */ |
| 1062 | 0, /* tp_getset */ |
| 1063 | 0, /* tp_base */ |
| 1064 | 0, /* tp_dict */ |
| 1065 | 0, /* tp_descr_get */ |
| 1066 | 0, /* tp_descr_set */ |
| 1067 | 0, /* tp_dictoffset */ |
| 1068 | 0, /* tp_init */ |
| 1069 | 0, /* tp_alloc */ |
| 1070 | }; |