gdb/python/py-inferior.c

   1 /* Python interface to inferiors.
   2
   3    Copyright (C) 2009-2012 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 "exceptions.h"
  22 #include "gdbcore.h"
  23 #include "gdbthread.h"
  24 #include "inferior.h"
  25 #include "objfiles.h"
  26 #include "observer.h"
  27 #include "python-internal.h"
  28 #include "arch-utils.h"
  29 #include "language.h"
  30 #include "gdb_signals.h"
  31 #include "py-event.h"
  32 #include "py-stopevent.h"
  33
  34 struct threadlist_entry {
  35   thread_object *thread_obj;
  36   struct threadlist_entry *next;
  37 };
  38
  39 typedef struct
  40 {
  41   PyObject_HEAD
  42
  43   /* The inferior we represent.  */
  44   struct inferior *inferior;
  45
  46   /* thread_object instances under this inferior.  This list owns a
  47      reference to each object it contains.  */
  48   struct threadlist_entry *threads;
  49
  50   /* Number of threads in the list.  */
  51   int nthreads;
  52 } inferior_object;
  53
  54 static PyTypeObject inferior_object_type;
  55
  56 static const struct inferior_data *infpy_inf_data_key;
  57
  58 typedef struct {
  59   PyObject_HEAD
  60   void *buffer;
  61
  62   /* These are kept just for mbpy_str.  */
  63   CORE_ADDR addr;
  64   CORE_ADDR length;
  65 } membuf_object;
  66
  67 static PyTypeObject membuf_object_type;
  68
  69 /* Require that INFERIOR be a valid inferior ID.  */
  70 #define INFPY_REQUIRE_VALID(Inferior)                           \
  71   do {                                                          \
  72     if (!Inferior->inferior)                                    \
  73       {                                                         \
  74         PyErr_SetString (PyExc_RuntimeError,                    \
  75                          _("Inferior no longer exists."));      \
  76         return NULL;                                            \
  77       }                                                         \
  78   } while (0)
  79
  80 static void
  81 python_on_normal_stop (struct bpstats *bs, int print_frame)
  82 {
  83   struct cleanup *cleanup;
  84   enum target_signal stop_signal;
  85
  86   if (!find_thread_ptid (inferior_ptid))
  87       return;
  88
  89   stop_signal = inferior_thread ()->suspend.stop_signal;
  90
  91   cleanup = ensure_python_env (get_current_arch (), current_language);
  92
  93   if (emit_stop_event (bs, stop_signal) < 0)
  94     gdbpy_print_stack ();
  95
  96   do_cleanups (cleanup);
  97 }
  98
  99 static void
 100 python_on_resume (ptid_t ptid)
 101 {
 102   struct cleanup *cleanup;
 103
 104   cleanup = ensure_python_env (target_gdbarch, current_language);
 105
 106   if (emit_continue_event (ptid) < 0)
 107     gdbpy_print_stack ();
 108
 109   do_cleanups (cleanup);
 110 }
 111
 112 static void
 113 python_inferior_exit (struct inferior *inf)
 114 {
 115   struct cleanup *cleanup;
 116   const LONGEST *exit_code = NULL;
 117
 118   cleanup = ensure_python_env (target_gdbarch, current_language);
 119
 120   if (inf->has_exit_code)
 121     exit_code = &inf->exit_code;
 122
 123   if (emit_exited_event (exit_code, inf) < 0)
 124     gdbpy_print_stack ();
 125
 126   do_cleanups (cleanup);
 127 }
 128
 129 /* Callback used to notify Python listeners about new objfiles loaded in the
 130    inferior.  */
 131
 132 static void
 133 python_new_objfile (struct objfile *objfile)
 134 {
 135   struct cleanup *cleanup;
 136
 137   if (objfile == NULL)
 138     return;
 139
 140   cleanup = ensure_python_env (get_objfile_arch (objfile), current_language);
 141
 142   if (emit_new_objfile_event (objfile) < 0)
 143     gdbpy_print_stack ();
 144
 145   do_cleanups (cleanup);
 146 }
 147
 148 /* Return a reference to the Python object of type Inferior
 149    representing INFERIOR.  If the object has already been created,
 150    return it and increment the reference count,  otherwise, create it.
 151    Return NULL on failure.  */
 152 PyObject *
 153 inferior_to_inferior_object (struct inferior *inferior)
 154 {
 155   inferior_object *inf_obj;
 156
 157   inf_obj = inferior_data (inferior, infpy_inf_data_key);
 158   if (!inf_obj)
 159     {
 160       inf_obj = PyObject_New (inferior_object, &inferior_object_type);
 161       if (!inf_obj)
 162           return NULL;
 163
 164       inf_obj->inferior = inferior;
 165       inf_obj->threads = NULL;
 166       inf_obj->nthreads = 0;
 167
 168       set_inferior_data (inferior, infpy_inf_data_key, inf_obj);
 169
 170     }
 171   else
 172     Py_INCREF ((PyObject *)inf_obj);
 173
 174   return (PyObject *) inf_obj;
 175 }
 176
 177 /* Finds the Python Inferior object for the given PID.  Returns a
 178    reference, or NULL if PID does not match any inferior object. */
 179
 180 PyObject *
 181 find_inferior_object (int pid)
 182 {
 183   struct inflist_entry *p;
 184   struct inferior *inf = find_inferior_pid (pid);
 185
 186   if (inf)
 187     return inferior_to_inferior_object (inf);
 188
 189   return NULL;
 190 }
 191
 192 thread_object *
 193 find_thread_object (ptid_t ptid)
 194 {
 195   int pid;
 196   struct threadlist_entry *thread;
 197   PyObject *inf_obj;
 198   thread_object *found = NULL;
 199
 200   pid = PIDGET (ptid);
 201   if (pid == 0)
 202     return NULL;
 203
 204   inf_obj = find_inferior_object (pid);
 205
 206   if (! inf_obj)
 207     return NULL;
 208
 209   for (thread = ((inferior_object *)inf_obj)->threads; thread;
 210        thread = thread->next)
 211     if (ptid_equal (thread->thread_obj->thread->ptid, ptid))
 212       {
 213         found = thread->thread_obj;
 214         break;
 215       }
 216
 217   Py_DECREF (inf_obj);
 218
 219   if (found)
 220     return found;
 221
 222   return NULL;
 223 }
 224
 225 static void
 226 add_thread_object (struct thread_info *tp)
 227 {
 228   struct cleanup *cleanup;
 229   thread_object *thread_obj;
 230   inferior_object *inf_obj;
 231   struct threadlist_entry *entry;
 232
 233   cleanup = ensure_python_env (python_gdbarch, python_language);
 234
 235   thread_obj = create_thread_object (tp);
 236   if (!thread_obj)
 237     {
 238       gdbpy_print_stack ();
 239       do_cleanups (cleanup);
 240       return;
 241     }
 242
 243   inf_obj = (inferior_object *) thread_obj->inf_obj;
 244
 245   entry = xmalloc (sizeof (struct threadlist_entry));
 246   entry->thread_obj = thread_obj;
 247   entry->next = inf_obj->threads;
 248
 249   inf_obj->threads = entry;
 250   inf_obj->nthreads++;
 251
 252   do_cleanups (cleanup);
 253 }
 254
 255 static void
 256 delete_thread_object (struct thread_info *tp, int ignore)
 257 {
 258   struct cleanup *cleanup;
 259   inferior_object *inf_obj;
 260   thread_object *thread_obj;
 261   struct threadlist_entry **entry, *tmp;
 262
 263   cleanup = ensure_python_env (python_gdbarch, python_language);
 264
 265   inf_obj = (inferior_object *) find_inferior_object (PIDGET(tp->ptid));
 266   if (!inf_obj)
 267     {
 268       do_cleanups (cleanup);
 269       return;
 270     }
 271
 272   /* Find thread entry in its inferior's thread_list.  */
 273   for (entry = &inf_obj->threads; *entry != NULL; entry =
 274          &(*entry)->next)
 275     if ((*entry)->thread_obj->thread == tp)
 276       break;
 277
 278   if (!*entry)
 279     {
 280       Py_DECREF (inf_obj);
 281       do_cleanups (cleanup);
 282       return;
 283     }
 284
 285   tmp = *entry;
 286   tmp->thread_obj->thread = NULL;
 287
 288   *entry = (*entry)->next;
 289   inf_obj->nthreads--;
 290
 291   Py_DECREF (tmp->thread_obj);
 292   Py_DECREF (inf_obj);
 293   xfree (tmp);
 294
 295   do_cleanups (cleanup);
 296 }
 297
 298 static PyObject *
 299 infpy_threads (PyObject *self, PyObject *args)
 300 {
 301   int i;
 302   struct threadlist_entry *entry;
 303   inferior_object *inf_obj = (inferior_object *) self;
 304   PyObject *tuple;
 305
 306   INFPY_REQUIRE_VALID (inf_obj);
 307
 308   tuple = PyTuple_New (inf_obj->nthreads);
 309   if (!tuple)
 310     return NULL;
 311
 312   for (i = 0, entry = inf_obj->threads; i < inf_obj->nthreads;
 313        i++, entry = entry->next)
 314     {
 315       Py_INCREF (entry->thread_obj);
 316       PyTuple_SET_ITEM (tuple, i, (PyObject *) entry->thread_obj);
 317     }
 318
 319   return tuple;
 320 }
 321
 322 static PyObject *
 323 infpy_get_num (PyObject *self, void *closure)
 324 {
 325   inferior_object *inf = (inferior_object *) self;
 326
 327   INFPY_REQUIRE_VALID (inf);
 328
 329   return PyLong_FromLong (inf->inferior->num);
 330 }
 331
 332 static PyObject *
 333 infpy_get_pid (PyObject *self, void *closure)
 334 {
 335   inferior_object *inf = (inferior_object *) self;
 336
 337   INFPY_REQUIRE_VALID (inf);
 338
 339   return PyLong_FromLong (inf->inferior->pid);
 340 }
 341
 342 static PyObject *
 343 infpy_get_was_attached (PyObject *self, void *closure)
 344 {
 345   inferior_object *inf = (inferior_object *) self;
 346
 347   INFPY_REQUIRE_VALID (inf);
 348   if (inf->inferior->attach_flag)
 349     Py_RETURN_TRUE;
 350   Py_RETURN_FALSE;
 351 }
 352
 353 static int
 354 build_inferior_list (struct inferior *inf, void *arg)
 355 {
 356   PyObject *list = arg;
 357   PyObject *inferior = inferior_to_inferior_object (inf);
 358   int success = 0;
 359
 360   if (! inferior)
 361     return 0;
 362
 363   success = PyList_Append (list, inferior);
 364   Py_DECREF (inferior);
 365
 366   if (success)
 367     return 1;
 368
 369   return 0;
 370 }
 371
 372 /* Implementation of gdb.inferiors () -> (gdb.Inferior, ...).
 373    Returns a tuple of all inferiors.  */
 374 PyObject *
 375 gdbpy_inferiors (PyObject *unused, PyObject *unused2)
 376 {
 377   PyObject *list, *tuple;
 378
 379   list = PyList_New (0);
 380   if (!list)
 381     return NULL;
 382
 383   if (iterate_over_inferiors (build_inferior_list, list))
 384     {
 385       Py_DECREF (list);
 386       return NULL;
 387     }
 388
 389   tuple = PyList_AsTuple (list);
 390   Py_DECREF (list);
 391
 392   return tuple;
 393 }
 394
 395 /* Membuf and memory manipulation.  */
 396
 397 /* Implementation of gdb.read_memory (address, length).
 398    Returns a Python buffer object with LENGTH bytes of the inferior's
 399    memory at ADDRESS.  Both arguments are integers.  Returns NULL on error,
 400    with a python exception set.  */
 401 static PyObject *
 402 infpy_read_memory (PyObject *self, PyObject *args, PyObject *kw)
 403 {
 404   int error = 0;
 405   CORE_ADDR addr, length;
 406   void *buffer = NULL;
 407   membuf_object *membuf_obj;
 408   PyObject *addr_obj, *length_obj, *result;
 409   volatile struct gdb_exception except;
 410   static char *keywords[] = { "address", "length", NULL };
 411
 412   if (! PyArg_ParseTupleAndKeywords (args, kw, "OO", keywords,
 413                                      &addr_obj, &length_obj))
 414     return NULL;
 415
 416   TRY_CATCH (except, RETURN_MASK_ALL)
 417     {
 418       if (!get_addr_from_python (addr_obj, &addr)
 419           || !get_addr_from_python (length_obj, &length))
 420         {
 421           error = 1;
 422           break;
 423         }
 424
 425       buffer = xmalloc (length);
 426
 427       read_memory (addr, buffer, length);
 428     }
 429   if (except.reason < 0)
 430     {
 431       xfree (buffer);
 432       GDB_PY_HANDLE_EXCEPTION (except);
 433     }
 434
 435   if (error)
 436     {
 437       xfree (buffer);
 438       return NULL;
 439     }
 440
 441   membuf_obj = PyObject_New (membuf_object, &membuf_object_type);
 442   if (membuf_obj == NULL)
 443     {
 444       xfree (buffer);
 445       PyErr_SetString (PyExc_MemoryError,
 446                        _("Could not allocate memory buffer object."));
 447       return NULL;
 448     }
 449
 450   membuf_obj->buffer = buffer;
 451   membuf_obj->addr = addr;
 452   membuf_obj->length = length;
 453
 454   result = PyBuffer_FromReadWriteObject ((PyObject *) membuf_obj, 0,
 455                                          Py_END_OF_BUFFER);
 456   Py_DECREF (membuf_obj);
 457   return result;
 458 }
 459
 460 /* Implementation of gdb.write_memory (address, buffer [, length]).
 461    Writes the contents of BUFFER (a Python object supporting the read
 462    buffer protocol) at ADDRESS in the inferior's memory.  Write LENGTH
 463    bytes from BUFFER, or its entire contents if the argument is not
 464    provided.  The function returns nothing.  Returns NULL on error, with
 465    a python exception set.  */
 466 static PyObject *
 467 infpy_write_memory (PyObject *self, PyObject *args, PyObject *kw)
 468 {
 469   Py_ssize_t buf_len;
 470   int error = 0;
 471   const char *buffer;
 472   CORE_ADDR addr, length;
 473   PyObject *addr_obj, *length_obj = NULL;
 474   volatile struct gdb_exception except;
 475   static char *keywords[] = { "address", "buffer", "length", NULL };
 476
 477
 478   if (! PyArg_ParseTupleAndKeywords (args, kw, "Os#|O", keywords,
 479                                      &addr_obj, &buffer, &buf_len,
 480                                      &length_obj))
 481     return NULL;
 482
 483   TRY_CATCH (except, RETURN_MASK_ALL)
 484     {
 485       if (!get_addr_from_python (addr_obj, &addr))
 486         {
 487           error = 1;
 488           break;
 489         }
 490
 491       if (!length_obj)
 492         length = buf_len;
 493       else if (!get_addr_from_python (length_obj, &length))
 494         {
 495           error = 1;
 496           break;
 497         }
 498       write_memory (addr, buffer, length);
 499     }
 500   GDB_PY_HANDLE_EXCEPTION (except);
 501
 502   if (error)
 503     return NULL;
 504
 505   Py_RETURN_NONE;
 506 }
 507
 508 /* Destructor of Membuf objects.  */
 509 static void
 510 mbpy_dealloc (PyObject *self)
 511 {
 512   xfree (((membuf_object *) self)->buffer);
 513   self->ob_type->tp_free (self);
 514 }
 515
 516 /* Return a description of the Membuf object.  */
 517 static PyObject *
 518 mbpy_str (PyObject *self)
 519 {
 520   membuf_object *membuf_obj = (membuf_object *) self;
 521
 522   return PyString_FromFormat (_("Memory buffer for address %s, \
 523 which is %s bytes long."),
 524                               paddress (python_gdbarch, membuf_obj->addr),
 525                               pulongest (membuf_obj->length));
 526 }
 527
 528 static Py_ssize_t
 529 get_read_buffer (PyObject *self, Py_ssize_t segment, void **ptrptr)
 530 {
 531   membuf_object *membuf_obj = (membuf_object *) self;
 532
 533   if (segment)
 534     {
 535       PyErr_SetString (PyExc_SystemError,
 536                        _("The memory buffer supports only one segment."));
 537       return -1;
 538     }
 539
 540   *ptrptr = membuf_obj->buffer;
 541
 542   return membuf_obj->length;
 543 }
 544
 545 static Py_ssize_t
 546 get_write_buffer (PyObject *self, Py_ssize_t segment, void **ptrptr)
 547 {
 548   return get_read_buffer (self, segment, ptrptr);
 549 }
 550
 551 static Py_ssize_t
 552 get_seg_count (PyObject *self, Py_ssize_t *lenp)
 553 {
 554   if (lenp)
 555     *lenp = ((membuf_object *) self)->length;
 556
 557   return 1;
 558 }
 559
 560 static Py_ssize_t
 561 get_char_buffer (PyObject *self, Py_ssize_t segment, char **ptrptr)
 562 {
 563   void *ptr = NULL;
 564   Py_ssize_t ret;
 565
 566   ret = get_read_buffer (self, segment, &ptr);
 567   *ptrptr = (char *) ptr;
 568
 569   return ret;
 570 }
 571
 572 /* Implementation of
 573    gdb.search_memory (address, length, pattern).  ADDRESS is the
 574    address to start the search.  LENGTH specifies the scope of the
 575    search from ADDRESS.  PATTERN is the pattern to search for (and
 576    must be a Python object supporting the buffer protocol).
 577    Returns a Python Long object holding the address where the pattern
 578    was located, or if the pattern was not found, returns None.  Returns NULL
 579    on error, with a python exception set.  */
 580 static PyObject *
 581 infpy_search_memory (PyObject *self, PyObject *args, PyObject *kw)
 582 {
 583   CORE_ADDR start_addr, length;
 584   static char *keywords[] = { "address", "length", "pattern", NULL };
 585   PyObject *pattern, *start_addr_obj, *length_obj;
 586   volatile struct gdb_exception except;
 587   Py_ssize_t pattern_size;
 588   const void *buffer;
 589   CORE_ADDR found_addr;
 590   int found = 0;
 591
 592   if (! PyArg_ParseTupleAndKeywords (args, kw, "OOO", keywords,
 593                                      &start_addr_obj, &length_obj,
 594                                      &pattern))
 595     return NULL;
 596
 597   if (get_addr_from_python (start_addr_obj, &start_addr)
 598       && get_addr_from_python (length_obj, &length))
 599     {
 600       if (!length)
 601         {
 602           PyErr_SetString (PyExc_ValueError,
 603                            _("Search range is empty."));
 604           return NULL;
 605         }
 606       /* Watch for overflows.  */
 607       else if (length > CORE_ADDR_MAX
 608                || (start_addr + length - 1) < start_addr)
 609         {
 610           PyErr_SetString (PyExc_ValueError,
 611                            _("The search range is too large."));
 612
 613           return NULL;
 614         }
 615     }
 616   else
 617     return NULL;
 618
 619   if (!PyObject_CheckReadBuffer (pattern))
 620     {
 621       PyErr_SetString (PyExc_RuntimeError,
 622                        _("The pattern is not a Python buffer."));
 623
 624       return NULL;
 625     }
 626
 627   if (PyObject_AsReadBuffer (pattern, &buffer, &pattern_size) == -1)
 628     return NULL;
 629
 630   TRY_CATCH (except, RETURN_MASK_ALL)
 631     {
 632       found = target_search_memory (start_addr, length,
 633                                     buffer, pattern_size,
 634                                     &found_addr);
 635     }
 636   GDB_PY_HANDLE_EXCEPTION (except);
 637
 638   if (found)
 639     return PyLong_FromLong (found_addr);
 640   else
 641     Py_RETURN_NONE;
 642 }
 643
 644 /* Implementation of gdb.Inferior.is_valid (self) -> Boolean.
 645    Returns True if this inferior object still exists in GDB.  */
 646
 647 static PyObject *
 648 infpy_is_valid (PyObject *self, PyObject *args)
 649 {
 650   inferior_object *inf = (inferior_object *) self;
 651
 652   if (! inf->inferior)
 653     Py_RETURN_FALSE;
 654
 655   Py_RETURN_TRUE;
 656 }
 657
 658 static void
 659 infpy_dealloc (PyObject *obj)
 660 {
 661   inferior_object *inf_obj = (inferior_object *) obj;
 662   struct inferior *inf = inf_obj->inferior;
 663
 664   if (! inf)
 665     return;
 666
 667   set_inferior_data (inf, infpy_inf_data_key, NULL);
 668 }
 669
 670 /* Clear the INFERIOR pointer in an Inferior object and clear the
 671    thread list.  */
 672 static void
 673 py_free_inferior (struct inferior *inf, void *datum)
 674 {
 675
 676   struct cleanup *cleanup;
 677   inferior_object *inf_obj = datum;
 678   struct threadlist_entry *th_entry, *th_tmp;
 679
 680   cleanup = ensure_python_env (python_gdbarch, python_language);
 681
 682   inf_obj->inferior = NULL;
 683
 684   /* Deallocate threads list.  */
 685   for (th_entry = inf_obj->threads; th_entry != NULL;)
 686     {
 687       Py_DECREF (th_entry->thread_obj);
 688
 689       th_tmp = th_entry;
 690       th_entry = th_entry->next;
 691       xfree (th_tmp);
 692     }
 693
 694   inf_obj->nthreads = 0;
 695
 696   Py_DECREF ((PyObject *) inf_obj);
 697   do_cleanups (cleanup);
 698 }
 699
 700 /* Implementation of gdb.selected_inferior() -> gdb.Inferior.
 701    Returns the current inferior object.  */
 702
 703 PyObject *
 704 gdbpy_selected_inferior (PyObject *self, PyObject *args)
 705 {
 706   PyObject *inf_obj;
 707
 708   inf_obj = inferior_to_inferior_object (current_inferior ());
 709   Py_INCREF (inf_obj);
 710
 711   return inf_obj;
 712 }
 713
 714 void
 715 gdbpy_initialize_inferior (void)
 716 {
 717   if (PyType_Ready (&inferior_object_type) < 0)
 718     return;
 719
 720   Py_INCREF (&inferior_object_type);
 721   PyModule_AddObject (gdb_module, "Inferior",
 722                       (PyObject *) &inferior_object_type);
 723
 724   infpy_inf_data_key =
 725     register_inferior_data_with_cleanup (py_free_inferior);
 726
 727   observer_attach_new_thread (add_thread_object);
 728   observer_attach_thread_exit (delete_thread_object);
 729   observer_attach_normal_stop (python_on_normal_stop);
 730   observer_attach_target_resumed (python_on_resume);
 731   observer_attach_inferior_exit (python_inferior_exit);
 732   observer_attach_new_objfile (python_new_objfile);
 733
 734   membuf_object_type.tp_new = PyType_GenericNew;
 735   if (PyType_Ready (&membuf_object_type) < 0)
 736     return;
 737
 738   Py_INCREF (&membuf_object_type);
 739   PyModule_AddObject (gdb_module, "Membuf", (PyObject *)
 740                       &membuf_object_type);
 741 }
 742
 743 static PyGetSetDef inferior_object_getset[] =
 744 {
 745   { "num", infpy_get_num, NULL, "ID of inferior, as assigned by GDB.", NULL },
 746   { "pid", infpy_get_pid, NULL, "PID of inferior, as assigned by the OS.",
 747     NULL },
 748   { "was_attached", infpy_get_was_attached, NULL,
 749     "True if the inferior was created using 'attach'.", NULL },
 750   { NULL }
 751 };
 752
 753 static PyMethodDef inferior_object_methods[] =
 754 {
 755   { "is_valid", infpy_is_valid, METH_NOARGS,
 756     "is_valid () -> Boolean.\n\
 757 Return true if this inferior is valid, false if not." },
 758   { "threads", infpy_threads, METH_NOARGS,
 759     "Return all the threads of this inferior." },
 760   { "read_memory", (PyCFunction) infpy_read_memory,
 761     METH_VARARGS | METH_KEYWORDS,
 762     "read_memory (address, length) -> buffer\n\
 763 Return a buffer object for reading from the inferior's memory." },
 764   { "write_memory", (PyCFunction) infpy_write_memory,
 765     METH_VARARGS | METH_KEYWORDS,
 766     "write_memory (address, buffer [, length])\n\
 767 Write the given buffer object to the inferior's memory." },
 768   { "search_memory", (PyCFunction) infpy_search_memory,
 769     METH_VARARGS | METH_KEYWORDS,
 770     "search_memory (address, length, pattern) -> long\n\
 771 Return a long with the address of a match, or None." },
 772   { NULL }
 773 };
 774
 775 static PyTypeObject inferior_object_type =
 776 {
 777   PyObject_HEAD_INIT (NULL)
 778   0,                              /* ob_size */
 779   "gdb.Inferior",                 /* tp_name */
 780   sizeof (inferior_object),       /* tp_basicsize */
 781   0,                              /* tp_itemsize */
 782   infpy_dealloc,                  /* tp_dealloc */
 783   0,                              /* tp_print */
 784   0,                              /* tp_getattr */
 785   0,                              /* tp_setattr */
 786   0,                              /* tp_compare */
 787   0,                              /* tp_repr */
 788   0,                              /* tp_as_number */
 789   0,                              /* tp_as_sequence */
 790   0,                              /* tp_as_mapping */
 791   0,                              /* tp_hash  */
 792   0,                              /* tp_call */
 793   0,                              /* tp_str */
 794   0,                              /* tp_getattro */
 795   0,                              /* tp_setattro */
 796   0,                              /* tp_as_buffer */
 797   Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER,  /* tp_flags */
 798   "GDB inferior object",          /* tp_doc */
 799   0,                              /* tp_traverse */
 800   0,                              /* tp_clear */
 801   0,                              /* tp_richcompare */
 802   0,                              /* tp_weaklistoffset */
 803   0,                              /* tp_iter */
 804   0,                              /* tp_iternext */
 805   inferior_object_methods,        /* tp_methods */
 806   0,                              /* tp_members */
 807   inferior_object_getset,         /* tp_getset */
 808   0,                              /* tp_base */
 809   0,                              /* tp_dict */
 810   0,                              /* tp_descr_get */
 811   0,                              /* tp_descr_set */
 812   0,                              /* tp_dictoffset */
 813   0,                              /* tp_init */
 814   0                               /* tp_alloc */
 815 };
 816
 817 /* Python doesn't provide a decent way to get compatibility here.  */
 818 #if HAVE_LIBPYTHON2_4
 819 #define CHARBUFFERPROC_NAME getcharbufferproc
 820 #else
 821 #define CHARBUFFERPROC_NAME charbufferproc
 822 #endif
 823
 824 static PyBufferProcs buffer_procs = {
 825   get_read_buffer,
 826   get_write_buffer,
 827   get_seg_count,
 828   /* The cast here works around a difference between Python 2.4 and
 829      Python 2.5.  */
 830   (CHARBUFFERPROC_NAME) get_char_buffer
 831 };
 832
 833 static PyTypeObject membuf_object_type = {
 834   PyObject_HEAD_INIT (NULL)
 835   0,                              /*ob_size*/
 836   "gdb.Membuf",                   /*tp_name*/
 837   sizeof (membuf_object),         /*tp_basicsize*/
 838   0,                              /*tp_itemsize*/
 839   mbpy_dealloc,                   /*tp_dealloc*/
 840   0,                              /*tp_print*/
 841   0,                              /*tp_getattr*/
 842   0,                              /*tp_setattr*/
 843   0,                              /*tp_compare*/
 844   0,                              /*tp_repr*/
 845   0,                              /*tp_as_number*/
 846   0,                              /*tp_as_sequence*/
 847   0,                              /*tp_as_mapping*/
 848   0,                              /*tp_hash */
 849   0,                              /*tp_call*/
 850   mbpy_str,                       /*tp_str*/
 851   0,                              /*tp_getattro*/
 852   0,                              /*tp_setattro*/
 853   &buffer_procs,                  /*tp_as_buffer*/
 854   Py_TPFLAGS_DEFAULT,             /*tp_flags*/
 855   "GDB memory buffer object",     /*tp_doc*/
 856   0,                              /* tp_traverse */
 857   0,                              /* tp_clear */
 858   0,                              /* tp_richcompare */
 859   0,                              /* tp_weaklistoffset */
 860   0,                              /* tp_iter */
 861   0,                              /* tp_iternext */
 862   0,                              /* tp_methods */
 863   0,                              /* tp_members */
 864   0,                              /* tp_getset */
 865   0,                              /* tp_base */
 866   0,                              /* tp_dict */
 867   0,                              /* tp_descr_get */
 868   0,                              /* tp_descr_set */
 869   0,                              /* tp_dictoffset */
 870   0,                              /* tp_init */
 871   0,                              /* tp_alloc */
 872 };