aboutsummaryrefslogtreecommitdiff
path: root/gdb/python/python.c
blob: b0b9a9ca30a21d4ce96ed8a88d97c3bea621a1df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
/* General python/gdb code

   Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "arch-utils.h"
#include "command.h"
#include "ui-out.h"
#include "cli/cli-script.h"
#include "gdbcmd.h"
#include "progspace.h"
#include "objfiles.h"
#include "value.h"
#include "language.h"
#include "exceptions.h"
#include "event-loop.h"
#include "serial.h"
#include "readline/tilde.h"
#include "python.h"

#include <ctype.h>

/* True if we should print the stack when catching a Python error,
   false otherwise.  */
static int gdbpy_should_print_stack = 0;

#ifdef HAVE_PYTHON

#include "libiberty.h"
#include "cli/cli-decode.h"
#include "charset.h"
#include "top.h"
#include "solib.h"
#include "python-internal.h"
#include "linespec.h"
#include "source.h"
#include "version.h"
#include "target.h"
#include "gdbthread.h"
#include "observer.h"
#include "interps.h"

static PyMethodDef GdbMethods[];

PyObject *gdb_module;

/* Some string constants we may wish to use.  */
PyObject *gdbpy_to_string_cst;
PyObject *gdbpy_children_cst;
PyObject *gdbpy_display_hint_cst;
PyObject *gdbpy_doc_cst;
PyObject *gdbpy_enabled_cst;
PyObject *gdbpy_value_cst;

/* The GdbError exception.  */
PyObject *gdbpy_gdberror_exc;

/* The `gdb.error' base class.  */
PyObject *gdbpy_gdb_error;

/* The `gdb.MemoryError' exception.  */
PyObject *gdbpy_gdb_memory_error;

/* Architecture and language to be used in callbacks from
   the Python interpreter.  */
struct gdbarch *python_gdbarch;
const struct language_defn *python_language;

/* Restore global language and architecture and Python GIL state
   when leaving the Python interpreter.  */

struct python_env
{
  PyGILState_STATE state;
  struct gdbarch *gdbarch;
  const struct language_defn *language;
  PyObject *error_type, *error_value, *error_traceback;
};

static void
restore_python_env (void *p)
{
  struct python_env *env = (struct python_env *)p;

  /* Leftover Python error is forbidden by Python Exception Handling.  */
  if (PyErr_Occurred ())
    {
      /* This order is similar to the one calling error afterwards. */
      gdbpy_print_stack ();
      warning (_("internal error: Unhandled Python exception"));
    }

  PyErr_Restore (env->error_type, env->error_value, env->error_traceback);

  PyGILState_Release (env->state);
  python_gdbarch = env->gdbarch;
  python_language = env->language;
  xfree (env);
}

/* Called before entering the Python interpreter to install the
   current language and architecture to be used for Python values.  */

struct cleanup *
ensure_python_env (struct gdbarch *gdbarch,
                   const struct language_defn *language)
{
  struct python_env *env = xmalloc (sizeof *env);

  env->state = PyGILState_Ensure ();
  env->gdbarch = python_gdbarch;
  env->language = python_language;

  python_gdbarch = gdbarch;
  python_language = language;

  /* Save it and ensure ! PyErr_Occurred () afterwards.  */
  PyErr_Fetch (&env->error_type, &env->error_value, &env->error_traceback);
  
  return make_cleanup (restore_python_env, env);
}

/* A wrapper around PyRun_SimpleFile.  FILENAME is the name of
   the Python script to run.

   One of the parameters of PyRun_SimpleFile is a FILE *.
   The problem is that type FILE is extremely system and compiler
   dependent.  So, unless the Python library has been compiled using
   the same build environment as GDB, we run the risk of getting
   a crash due to inconsistencies between the definition used by GDB,
   and the definition used by Python.  A mismatch can very likely
   lead to a crash.

   There is also the situation where the Python library and GDB
   are using two different versions of the C runtime library.
   This is particularly visible on Windows, where few users would
   build Python themselves (this is no trivial task on this platform),
   and thus use binaries built by someone else instead. Python,
   being built with VC, would use one version of the msvcr DLL
   (Eg. msvcr100.dll), while MinGW uses msvcrt.dll.  A FILE *
   from one runtime does not necessarily operate correctly in
   the other runtime.

   To work around this potential issue, we create the FILE object
   using Python routines, thus making sure that it is compatible
   with the Python library.  */

static void
python_run_simple_file (const char *filename)
{
  char *full_path;
  PyObject *python_file;
  struct cleanup *cleanup;

  /* Because we have a string for a filename, and are using Python to
     open the file, we need to expand any tilde in the path first.  */
  full_path = tilde_expand (filename);
  cleanup = make_cleanup (xfree, full_path);
  python_file = PyFile_FromString (full_path, "r");
  if (! python_file)
    {
      do_cleanups (cleanup);
      gdbpy_print_stack ();
      error (_("Error while opening file: %s"), full_path);
    }
 
  make_cleanup_py_decref (python_file);
  PyRun_SimpleFile (PyFile_AsFile (python_file), filename);
  do_cleanups (cleanup);
}

/* Given a command_line, return a command string suitable for passing
   to Python.  Lines in the string are separated by newlines.  The
   return value is allocated using xmalloc and the caller is
   responsible for freeing it.  */

static char *
compute_python_string (struct command_line *l)
{
  struct command_line *iter;
  char *script = NULL;
  int size = 0;
  int here;

  for (iter = l; iter; iter = iter->next)
    size += strlen (iter->line) + 1;

  script = xmalloc (size + 1);
  here = 0;
  for (iter = l; iter; iter = iter->next)
    {
      int len = strlen (iter->line);

      strcpy (&script[here], iter->line);
      here += len;
      script[here++] = '\n';
    }
  script[here] = '\0';
  return script;
}

/* Take a command line structure representing a 'python' command, and
   evaluate its body using the Python interpreter.  */

void
eval_python_from_control_command (struct command_line *cmd)
{
  int ret;
  char *script;
  struct cleanup *cleanup;

  if (cmd->body_count != 1)
    error (_("Invalid \"python\" block structure."));

  cleanup = ensure_python_env (get_current_arch (), current_language);

  script = compute_python_string (cmd->body_list[0]);
  ret = PyRun_SimpleString (script);
  xfree (script);
  if (ret)
    {
      gdbpy_print_stack ();
      error (_("Error while executing Python code."));
    }

  do_cleanups (cleanup);
}

/* Implementation of the gdb "python" command.  */

static void
python_command (char *arg, int from_tty)
{
  struct cleanup *cleanup;

  cleanup = ensure_python_env (get_current_arch (), current_language);

  make_cleanup_restore_integer (&interpreter_async);
  interpreter_async = 0;

  while (arg && *arg && isspace (*arg))
    ++arg;
  if (arg && *arg)
    {
      if (PyRun_SimpleString (arg))
	{
	  gdbpy_print_stack ();
	  error (_("Error while executing Python code."));
	}
    }
  else
    {
      struct command_line *l = get_command_line (python_control, "");

      make_cleanup_free_command_lines (&l);
      execute_control_command_untraced (l);
    }

  do_cleanups (cleanup);
}



/* Transform a gdb parameters's value into a Python value.  May return
   NULL (and set a Python exception) on error.  Helper function for
   get_parameter.  */
PyObject *
gdbpy_parameter_value (enum var_types type, void *var)
{
  switch (type)
    {
    case var_string:
    case var_string_noescape:
    case var_optional_filename:
    case var_filename:
    case var_enum:
      {
	char *str = * (char **) var;

	if (! str)
	  str = "";
	return PyString_Decode (str, strlen (str), host_charset (), NULL);
      }

    case var_boolean:
      {
	if (* (int *) var)
	  Py_RETURN_TRUE;
	else
	  Py_RETURN_FALSE;
      }

    case var_auto_boolean:
      {
	enum auto_boolean ab = * (enum auto_boolean *) var;

	if (ab == AUTO_BOOLEAN_TRUE)
	  Py_RETURN_TRUE;
	else if (ab == AUTO_BOOLEAN_FALSE)
	  Py_RETURN_FALSE;
	else
	  Py_RETURN_NONE;
      }

    case var_integer:
      if ((* (int *) var) == INT_MAX)
	Py_RETURN_NONE;
      /* Fall through.  */
    case var_zinteger:
      return PyLong_FromLong (* (int *) var);

    case var_uinteger:
      {
	unsigned int val = * (unsigned int *) var;

	if (val == UINT_MAX)
	  Py_RETURN_NONE;
	return PyLong_FromUnsignedLong (val);
      }
    }

  return PyErr_Format (PyExc_RuntimeError, 
		       _("Programmer error: unhandled type."));
}

/* A Python function which returns a gdb parameter's value as a Python
   value.  */

PyObject *
gdbpy_parameter (PyObject *self, PyObject *args)
{
  struct cmd_list_element *alias, *prefix, *cmd;
  const char *arg;
  char *newarg;
  int found = -1;
  volatile struct gdb_exception except;

  if (! PyArg_ParseTuple (args, "s", &arg))
    return NULL;

  newarg = concat ("show ", arg, (char *) NULL);

  TRY_CATCH (except, RETURN_MASK_ALL)
    {
      found = lookup_cmd_composition (newarg, &alias, &prefix, &cmd);
    }
  xfree (newarg);
  GDB_PY_HANDLE_EXCEPTION (except);
  if (!found)
    return PyErr_Format (PyExc_RuntimeError,
			 _("Could not find parameter `%s'."), arg);

  if (! cmd->var)
    return PyErr_Format (PyExc_RuntimeError, 
			 _("`%s' is not a parameter."), arg);
  return gdbpy_parameter_value (cmd->var_type, cmd->var);
}

/* Wrapper for target_charset.  */

static PyObject *
gdbpy_target_charset (PyObject *self, PyObject *args)
{
  const char *cset = target_charset (python_gdbarch);

  return PyUnicode_Decode (cset, strlen (cset), host_charset (), NULL);
}

/* Wrapper for target_wide_charset.  */

static PyObject *
gdbpy_target_wide_charset (PyObject *self, PyObject *args)
{
  const char *cset = target_wide_charset (python_gdbarch);

  return PyUnicode_Decode (cset, strlen (cset), host_charset (), NULL);
}

/* A Python function which evaluates a string using the gdb CLI.  */

static PyObject *
execute_gdb_command (PyObject *self, PyObject *args, PyObject *kw)
{
  const char *arg;
  PyObject *from_tty_obj = NULL, *to_string_obj = NULL;
  int from_tty, to_string;
  volatile struct gdb_exception except;
  static char *keywords[] = {"command", "from_tty", "to_string", NULL };
  char *result = NULL;

  if (! PyArg_ParseTupleAndKeywords (args, kw, "s|O!O!", keywords, &arg,
				     &PyBool_Type, &from_tty_obj,
				     &PyBool_Type, &to_string_obj))
    return NULL;

  from_tty = 0;
  if (from_tty_obj)
    {
      int cmp = PyObject_IsTrue (from_tty_obj);
      if (cmp < 0)
	return NULL;
      from_tty = cmp;
    }

  to_string = 0;
  if (to_string_obj)
    {
      int cmp = PyObject_IsTrue (to_string_obj);
      if (cmp < 0)
	return NULL;
      to_string = cmp;
    }

  TRY_CATCH (except, RETURN_MASK_ALL)
    {
      /* Copy the argument text in case the command modifies it.  */
      char *copy = xstrdup (arg);
      struct cleanup *cleanup = make_cleanup (xfree, copy);

      make_cleanup_restore_integer (&interpreter_async);
      interpreter_async = 0;

      prevent_dont_repeat ();
      if (to_string)
	result = execute_command_to_string (copy, from_tty);
      else
	{
	  result = NULL;
	  execute_command (copy, from_tty);
	}

      do_cleanups (cleanup);
    }
  GDB_PY_HANDLE_EXCEPTION (except);

  /* Do any commands attached to breakpoint we stopped at.  */
  bpstat_do_actions ();

  if (result)
    {
      PyObject *r = PyString_FromString (result);
      xfree (result);
      return r;
    }
  Py_RETURN_NONE;
}

/* Implementation of gdb.solib_name (Long) -> String.
   Returns the name of the shared library holding a given address, or None.  */

static PyObject *
gdbpy_solib_name (PyObject *self, PyObject *args)
{
  char *soname;
  PyObject *str_obj;
  gdb_py_longest pc;

  if (!PyArg_ParseTuple (args, GDB_PY_LL_ARG, &pc))
    return NULL;

  soname = solib_name_from_address (current_program_space, pc);
  if (soname)
    str_obj = PyString_Decode (soname, strlen (soname), host_charset (), NULL);
  else
    {
      str_obj = Py_None;
      Py_INCREF (Py_None);
    }

  return str_obj;
}

/* A Python function which is a wrapper for decode_line_1.  */

static PyObject *
gdbpy_decode_line (PyObject *self, PyObject *args)
{
  struct symtabs_and_lines sals = { NULL, 0 }; /* Initialize to
						  appease gcc.  */
  struct symtab_and_line sal;
  const char *arg = NULL;
  char *copy = NULL;
  struct cleanup *cleanups;
  PyObject *result = NULL;
  PyObject *return_result = NULL;
  PyObject *unparsed = NULL;
  volatile struct gdb_exception except;

  if (! PyArg_ParseTuple (args, "|s", &arg))
    return NULL;

  cleanups = make_cleanup (null_cleanup, NULL);

  TRY_CATCH (except, RETURN_MASK_ALL)
    {
      if (arg)
	{
	  copy = xstrdup (arg);
	  make_cleanup (xfree, copy);
	  sals = decode_line_1 (&copy, 0, 0, 0);
	  make_cleanup (xfree, sals.sals);
	}
      else
	{
	  set_default_source_symtab_and_line ();
	  sal = get_current_source_symtab_and_line ();
	  sals.sals = &sal;
	  sals.nelts = 1;
	}
    }
  if (except.reason < 0)
    {
      do_cleanups (cleanups);
      /* We know this will always throw.  */
      GDB_PY_HANDLE_EXCEPTION (except);
    }

  if (sals.nelts)
    {
      int i;

      result = PyTuple_New (sals.nelts);
      if (! result)
	goto error;
      for (i = 0; i < sals.nelts; ++i)
	{
	  PyObject *obj;
	  char *str;

	  obj = symtab_and_line_to_sal_object (sals.sals[i]);
	  if (! obj)
	    {
	      Py_DECREF (result);
	      goto error;
	    }

	  PyTuple_SetItem (result, i, obj);
	}
    }
  else
    {
      result = Py_None;
      Py_INCREF (Py_None);
    }

  return_result = PyTuple_New (2);
  if (! return_result)
    {
      Py_DECREF (result);
      goto error;
    }

  if (copy && strlen (copy) > 0)
    unparsed = PyString_FromString (copy);
  else
    {
      unparsed = Py_None;
      Py_INCREF (Py_None);
    }

  PyTuple_SetItem (return_result, 0, unparsed);
  PyTuple_SetItem (return_result, 1, result);

  do_cleanups (cleanups);

  return return_result;

 error:
  do_cleanups (cleanups);
  return NULL;
}

/* Parse a string and evaluate it as an expression.  */
static PyObject *
gdbpy_parse_and_eval (PyObject *self, PyObject *args)
{
  const char *expr_str;
  struct value *result = NULL;
  volatile struct gdb_exception except;

  if (!PyArg_ParseTuple (args, "s", &expr_str))
    return NULL;

  TRY_CATCH (except, RETURN_MASK_ALL)
    {
      char *copy = xstrdup (expr_str);
      struct cleanup *cleanup = make_cleanup (xfree, copy);

      result = parse_and_eval (copy);
      do_cleanups (cleanup);
    }
  GDB_PY_HANDLE_EXCEPTION (except);

  return value_to_value_object (result);
}

/* Read a file as Python code.
   FILE is the name of the file.
   This does not throw any errors.  If an exception occurs python will print
   the traceback and clear the error indicator.  */

void
source_python_script (const char *file)
{
  struct cleanup *cleanup;

  cleanup = ensure_python_env (get_current_arch (), current_language);
  python_run_simple_file (file);
  do_cleanups (cleanup);
}



/* Posting and handling events.  */

/* A single event.  */
struct gdbpy_event
{
  /* The Python event.  This is just a callable object.  */
  PyObject *event;
  /* The next event.  */
  struct gdbpy_event *next;
};

/* All pending events.  */
static struct gdbpy_event *gdbpy_event_list;
/* The final link of the event list.  */
static struct gdbpy_event **gdbpy_event_list_end;

/* We use a file handler, and not an async handler, so that we can
   wake up the main thread even when it is blocked in poll().  */
static struct serial *gdbpy_event_fds[2];

/* The file handler callback.  This reads from the internal pipe, and
   then processes the Python event queue.  This will always be run in
   the main gdb thread.  */

static void
gdbpy_run_events (struct serial *scb, void *context)
{
  struct cleanup *cleanup;
  int r;

  cleanup = ensure_python_env (get_current_arch (), current_language);

  /* Flush the fd.  Do this before flushing the events list, so that
     any new event post afterwards is sure to re-awake the event
     loop.  */
  while (serial_readchar (gdbpy_event_fds[0], 0) >= 0)
    ;

  while (gdbpy_event_list)
    {
      /* Dispatching the event might push a new element onto the event
	 loop, so we update here "atomically enough".  */
      struct gdbpy_event *item = gdbpy_event_list;
      gdbpy_event_list = gdbpy_event_list->next;
      if (gdbpy_event_list == NULL)
	gdbpy_event_list_end = &gdbpy_event_list;

      /* Ignore errors.  */
      if (PyObject_CallObject (item->event, NULL) == NULL)
	PyErr_Clear ();

      Py_DECREF (item->event);
      xfree (item);
    }

  do_cleanups (cleanup);
}

/* Submit an event to the gdb thread.  */
static PyObject *
gdbpy_post_event (PyObject *self, PyObject *args)
{
  struct gdbpy_event *event;
  PyObject *func;
  int wakeup;

  if (!PyArg_ParseTuple (args, "O", &func))
    return NULL;

  if (!PyCallable_Check (func))
    {
      PyErr_SetString (PyExc_RuntimeError, 
		       _("Posted event is not callable"));
      return NULL;
    }

  Py_INCREF (func);

  /* From here until the end of the function, we have the GIL, so we
     can operate on our global data structures without worrying.  */
  wakeup = gdbpy_event_list == NULL;

  event = XNEW (struct gdbpy_event);
  event->event = func;
  event->next = NULL;
  *gdbpy_event_list_end = event;
  gdbpy_event_list_end = &event->next;

  /* Wake up gdb when needed.  */
  if (wakeup)
    {
      char c = 'q';		/* Anything. */

      if (serial_write (gdbpy_event_fds[1], &c, 1))
        return PyErr_SetFromErrno (PyExc_IOError);
    }

  Py_RETURN_NONE;
}

/* Initialize the Python event handler.  */
static void
gdbpy_initialize_events (void)
{
  if (serial_pipe (gdbpy_event_fds) == 0)
    {
      gdbpy_event_list_end = &gdbpy_event_list;
      serial_async (gdbpy_event_fds[0], gdbpy_run_events, NULL);
    }
}



static void
before_prompt_hook (const char *current_gdb_prompt)
{
  struct cleanup *cleanup;
  char *prompt = NULL;

  cleanup = ensure_python_env (get_current_arch (), current_language);

  if (PyObject_HasAttrString (gdb_module, "prompt_hook"))
    {
      PyObject *hook;

      hook = PyObject_GetAttrString (gdb_module, "prompt_hook");
      if (hook == NULL)
	goto fail;

      if (PyCallable_Check (hook))
	{
	  PyObject *result;
	  PyObject *current_prompt;

	  current_prompt = PyString_FromString (current_gdb_prompt);
	  if (current_prompt == NULL)
	    goto fail;

	  result = PyObject_CallFunctionObjArgs (hook, current_prompt, NULL);

	  Py_DECREF (current_prompt);

	  if (result == NULL)
	    goto fail;

	  make_cleanup_py_decref (result);

	  /* Return type should be None, or a String.  If it is None,
	     fall through, we will not set a prompt.  If it is a
	     string, set  PROMPT.  Anything else, set an exception.  */
	  if (result != Py_None && ! PyString_Check (result))
	    {
	      PyErr_Format (PyExc_RuntimeError,
			    _("Return from prompt_hook must " \
			      "be either a Python string, or None"));
	      goto fail;
	    }

	  if (result != Py_None)
	    {
	      prompt = python_string_to_host_string (result);

	      if (prompt == NULL)
		goto fail;
	      else
		make_cleanup (xfree, prompt);
	    }
	}
    }

  /* If a prompt has been set, PROMPT will not be NULL.  If it is
     NULL, do not set the prompt.  */
  if (prompt != NULL)
    set_prompt (prompt);

  do_cleanups (cleanup);
  return;

 fail:
  gdbpy_print_stack ();
  do_cleanups (cleanup);
  return;
}



/* Printing.  */

/* A python function to write a single string using gdb's filtered
   output stream .  The optional keyword STREAM can be used to write
   to a particular stream.  The default stream is to gdb_stdout.  */

static PyObject *
gdbpy_write (PyObject *self, PyObject *args, PyObject *kw)
{
  const char *arg;
  static char *keywords[] = {"text", "stream", NULL };
  int stream_type = 0;
  
  if (! PyArg_ParseTupleAndKeywords (args, kw, "s|i", keywords, &arg,
				     &stream_type))
    return NULL;

  switch (stream_type)
    {
    case 1:
      {
	fprintf_filtered (gdb_stderr, "%s", arg);
	break;
      }
    case 2:
      {
	fprintf_filtered (gdb_stdlog, "%s", arg);
	break;
      }
    default:
      fprintf_filtered (gdb_stdout, "%s", arg);
    }
     
  Py_RETURN_NONE;
}

/* A python function to flush a gdb stream.  The optional keyword
   STREAM can be used to flush a particular stream.  The default stream
   is gdb_stdout.  */

static PyObject *
gdbpy_flush (PyObject *self, PyObject *args, PyObject *kw)
{
  static char *keywords[] = {"stream", NULL };
  int stream_type = 0;
  
  if (! PyArg_ParseTupleAndKeywords (args, kw, "|i", keywords,
				     &stream_type))
    return NULL;

  switch (stream_type)
    {
    case 1:
      {
	gdb_flush (gdb_stderr);
	break;
      }
    case 2:
      {
	gdb_flush (gdb_stdlog);
	break;
      }
    default:
      gdb_flush (gdb_stdout);
    }
     
  Py_RETURN_NONE;
}

/* Print a python exception trace, or print nothing and clear the
   python exception, depending on gdbpy_should_print_stack.  Only call
   this if a python exception is set.  */
void
gdbpy_print_stack (void)
{
  if (gdbpy_should_print_stack)
    {
      PyErr_Print ();
      /* PyErr_Print doesn't necessarily end output with a newline.
	 This works because Python's stdout/stderr is fed through
	 printf_filtered.  */
      begin_line ();
    }
  else
    PyErr_Clear ();
}



/* Return the current Progspace.
   There always is one.  */

static PyObject *
gdbpy_get_current_progspace (PyObject *unused1, PyObject *unused2)
{
  PyObject *result;

  result = pspace_to_pspace_object (current_program_space);
  if (result)
    Py_INCREF (result);
  return result;
}

/* Return a sequence holding all the Progspaces.  */

static PyObject *
gdbpy_progspaces (PyObject *unused1, PyObject *unused2)
{
  struct program_space *ps;
  PyObject *list;

  list = PyList_New (0);
  if (!list)
    return NULL;

  ALL_PSPACES (ps)
  {
    PyObject *item = pspace_to_pspace_object (ps);

    if (!item || PyList_Append (list, item) == -1)
      {
	Py_DECREF (list);
	return NULL;
      }
  }

  return list;
}



/* The "current" objfile.  This is set when gdb detects that a new
   objfile has been loaded.  It is only set for the duration of a call to
   source_python_script_for_objfile; it is NULL at other times.  */
static struct objfile *gdbpy_current_objfile;

/* Set the current objfile to OBJFILE and then read FILE as Python code.
   This does not throw any errors.  If an exception occurs python will print
   the traceback and clear the error indicator.  */

void
source_python_script_for_objfile (struct objfile *objfile, const char *file)
{
  struct cleanup *cleanups;

  cleanups = ensure_python_env (get_objfile_arch (objfile), current_language);
  gdbpy_current_objfile = objfile;

  python_run_simple_file (file);

  do_cleanups (cleanups);
  gdbpy_current_objfile = NULL;
}

/* Return the current Objfile, or None if there isn't one.  */

static PyObject *
gdbpy_get_current_objfile (PyObject *unused1, PyObject *unused2)
{
  PyObject *result;

  if (! gdbpy_current_objfile)
    Py_RETURN_NONE;

  result = objfile_to_objfile_object (gdbpy_current_objfile);
  if (result)
    Py_INCREF (result);
  return result;
}

/* Return a sequence holding all the Objfiles.  */

static PyObject *
gdbpy_objfiles (PyObject *unused1, PyObject *unused2)
{
  struct objfile *objf;
  PyObject *list;

  list = PyList_New (0);
  if (!list)
    return NULL;

  ALL_OBJFILES (objf)
  {
    PyObject *item = objfile_to_objfile_object (objf);

    if (!item || PyList_Append (list, item) == -1)
      {
	Py_DECREF (list);
	return NULL;
      }
  }

  return list;
}

#else /* HAVE_PYTHON */

/* Dummy implementation of the gdb "python" command.  */

static void
python_command (char *arg, int from_tty)
{
  while (arg && *arg && isspace (*arg))
    ++arg;
  if (arg && *arg)
    error (_("Python scripting is not supported in this copy of GDB."));
  else
    {
      struct command_line *l = get_command_line (python_control, "");
      struct cleanup *cleanups = make_cleanup_free_command_lines (&l);

      execute_control_command_untraced (l);
      do_cleanups (cleanups);
    }
}

void
eval_python_from_control_command (struct command_line *cmd)
{
  error (_("Python scripting is not supported in this copy of GDB."));
}

void
source_python_script (const char *file)
{
  throw_error (UNSUPPORTED_ERROR,
	       _("Python scripting is not supported in this copy of GDB."));
}

int
gdbpy_should_stop (struct breakpoint_object *bp_obj)
{
  internal_error (__FILE__, __LINE__,
		  _("gdbpy_should_stop called when Python scripting is  " \
		    "not supported."));
}

int
gdbpy_breakpoint_has_py_cond (struct breakpoint_object *bp_obj)
{
  internal_error (__FILE__, __LINE__,
		  _("gdbpy_breakpoint_has_py_cond called when Python " \
		    "scripting is not supported."));
}

#endif /* HAVE_PYTHON */



/* Lists for 'maint set python' commands.  */

static struct cmd_list_element *maint_set_python_list;
static struct cmd_list_element *maint_show_python_list;

/* Lists for 'set python' commands.  */

static struct cmd_list_element *user_set_python_list;
static struct cmd_list_element *user_show_python_list;

/* Function for use by 'maint set python' prefix command.  */

static void
maint_set_python (char *args, int from_tty)
{
  help_list (maint_set_python_list, "maintenance set python ",
	     class_deprecated, gdb_stdout);
}

/* Function for use by 'maint show python' prefix command.  */

static void
maint_show_python (char *args, int from_tty)
{
  cmd_show_list (maint_show_python_list, from_tty, "");
}

/* Function for use by 'set python' prefix command.  */

static void
user_set_python (char *args, int from_tty)
{
  help_list (user_set_python_list, "set python ", all_commands,
	     gdb_stdout);
}

/* Function for use by 'show python' prefix command.  */

static void
user_show_python (char *args, int from_tty)
{
  cmd_show_list (user_show_python_list, from_tty, "");
}

/* Initialize the Python code.  */

/* Provide a prototype to silence -Wmissing-prototypes.  */
extern initialize_file_ftype _initialize_python;

void
_initialize_python (void)
{
  char *cmd_name;
  struct cmd_list_element *cmd;

  add_com ("python", class_obscure, python_command,
#ifdef HAVE_PYTHON
	   _("\
Evaluate a Python command.\n\
\n\
The command can be given as an argument, for instance:\n\
\n\
    python print 23\n\
\n\
If no argument is given, the following lines are read and used\n\
as the Python commands.  Type a line containing \"end\" to indicate\n\
the end of the command.")
#else /* HAVE_PYTHON */
	   _("\
Evaluate a Python command.\n\
\n\
Python scripting is not supported in this copy of GDB.\n\
This command is only a placeholder.")
#endif /* HAVE_PYTHON */
	   );

  add_prefix_cmd ("python", no_class, maint_show_python,
		  _("Prefix command for python maintenance settings."),
		  &maint_show_python_list, "maintenance show python ", 0,
		  &maintenance_show_cmdlist);
  add_prefix_cmd ("python", no_class, maint_set_python,
		  _("Prefix command for python maintenance settings."),
		  &maint_set_python_list, "maintenance set python ", 0,
		  &maintenance_set_cmdlist);

  add_setshow_boolean_cmd ("print-stack", class_maintenance,
			   &gdbpy_should_print_stack, _("\
Enable or disable printing of Python stack dump on error."), _("\
Show whether Python stack will be printed on error."), _("\
Enables or disables printing of Python stack traces."),
			   NULL, NULL,
			   &maint_set_python_list,
			   &maint_show_python_list);

  /* Deprecate maint set/show python print-stack in favour of
     non-maintenance alternatives.  */
  cmd_name = "print-stack";
  cmd = lookup_cmd (&cmd_name, maint_set_python_list, "", -1, 0);
  deprecate_cmd (cmd, "set python print-stack");
  cmd_name = "print-stack"; /* Reset name.  */
  cmd = lookup_cmd (&cmd_name, maint_show_python_list, "", -1, 0);
  deprecate_cmd (cmd, "show python print-stack");

  /* Add set/show python print-stack.  */
  add_prefix_cmd ("python", no_class, user_show_python,
		  _("Prefix command for python preference settings."),
		  &user_show_python_list, "show python ", 0,
		  &showlist);

  add_prefix_cmd ("python", no_class, user_set_python,
		  _("Prefix command for python preference settings."),
		  &user_set_python_list, "set python ", 0,
		  &setlist);

  add_setshow_boolean_cmd ("print-stack", no_class,
			   &gdbpy_should_print_stack, _("\
Enable or disable printing of Python stack dump on error."), _("\
Show whether Python stack will be printed on error."), _("\
Enables or disables printing of Python stack traces."),
			   NULL, NULL,
			   &user_set_python_list,
			   &user_show_python_list);

#ifdef HAVE_PYTHON
#ifdef WITH_PYTHON_PATH
  /* Work around problem where python gets confused about where it is,
     and then can't find its libraries, etc.
     NOTE: Python assumes the following layout:
     /foo/bin/python
     /foo/lib/pythonX.Y/...
     This must be done before calling Py_Initialize.  */
  Py_SetProgramName (concat (ldirname (python_libdir), SLASH_STRING, "bin",
			     SLASH_STRING, "python", NULL));
#endif

  Py_Initialize ();
  PyEval_InitThreads ();

  gdb_module = Py_InitModule ("gdb", GdbMethods);

  /* The casts to (char*) are for python 2.4.  */
  PyModule_AddStringConstant (gdb_module, "VERSION", (char*) version);
  PyModule_AddStringConstant (gdb_module, "HOST_CONFIG", (char*) host_name);
  PyModule_AddStringConstant (gdb_module, "TARGET_CONFIG",
			      (char*) target_name);

  /* Add stream constants.  */
  PyModule_AddIntConstant (gdb_module, "STDOUT", 0);
  PyModule_AddIntConstant (gdb_module, "STDERR", 1);
  PyModule_AddIntConstant (gdb_module, "STDLOG", 2);
  
  /* gdb.parameter ("data-directory") doesn't necessarily exist when the python
     script below is run (depending on order of _initialize_* functions).
     Define the initial value of gdb.PYTHONDIR here.  */
  {
    char *gdb_pythondir;

    gdb_pythondir = concat (gdb_datadir, SLASH_STRING, "python", NULL);
    PyModule_AddStringConstant (gdb_module, "PYTHONDIR", gdb_pythondir);
    xfree (gdb_pythondir);
  }

  gdbpy_gdb_error = PyErr_NewException ("gdb.error", PyExc_RuntimeError, NULL);
  PyModule_AddObject (gdb_module, "error", gdbpy_gdb_error);

  gdbpy_gdb_memory_error = PyErr_NewException ("gdb.MemoryError",
					       gdbpy_gdb_error, NULL);
  PyModule_AddObject (gdb_module, "MemoryError", gdbpy_gdb_memory_error);

  gdbpy_gdberror_exc = PyErr_NewException ("gdb.GdbError", NULL, NULL);
  PyModule_AddObject (gdb_module, "GdbError", gdbpy_gdberror_exc);

  gdbpy_initialize_auto_load ();
  gdbpy_initialize_values ();
  gdbpy_initialize_frames ();
  gdbpy_initialize_commands ();
  gdbpy_initialize_symbols ();
  gdbpy_initialize_symtabs ();
  gdbpy_initialize_blocks ();
  gdbpy_initialize_functions ();
  gdbpy_initialize_parameters ();
  gdbpy_initialize_types ();
  gdbpy_initialize_pspace ();
  gdbpy_initialize_objfile ();
  gdbpy_initialize_breakpoints ();
  gdbpy_initialize_lazy_string ();
  gdbpy_initialize_thread ();
  gdbpy_initialize_inferior ();
  gdbpy_initialize_events ();

  gdbpy_initialize_eventregistry ();
  gdbpy_initialize_py_events ();
  gdbpy_initialize_event ();
  gdbpy_initialize_stop_event ();
  gdbpy_initialize_signal_event ();
  gdbpy_initialize_breakpoint_event ();
  gdbpy_initialize_continue_event ();
  gdbpy_initialize_exited_event ();
  gdbpy_initialize_thread_event ();
  gdbpy_initialize_new_objfile_event () ;

  observer_attach_before_prompt (before_prompt_hook);

  PyRun_SimpleString ("import gdb");
  PyRun_SimpleString ("gdb.pretty_printers = []");

  gdbpy_to_string_cst = PyString_FromString ("to_string");
  gdbpy_children_cst = PyString_FromString ("children");
  gdbpy_display_hint_cst = PyString_FromString ("display_hint");
  gdbpy_doc_cst = PyString_FromString ("__doc__");
  gdbpy_enabled_cst = PyString_FromString ("enabled");
  gdbpy_value_cst = PyString_FromString ("value");

  /* Release the GIL while gdb runs.  */
  PyThreadState_Swap (NULL);
  PyEval_ReleaseLock ();

#endif /* HAVE_PYTHON */
}

#ifdef HAVE_PYTHON

/* Perform the remaining python initializations.
   These must be done after GDB is at least mostly initialized.
   E.g., The "info pretty-printer" command needs the "info" prefix
   command installed.  */

void
finish_python_initialization (void)
{
  struct cleanup *cleanup;

  cleanup = ensure_python_env (get_current_arch (), current_language);

  PyRun_SimpleString ("\
import os\n\
import sys\n\
\n\
class GdbOutputFile:\n\
  def close(self):\n\
    # Do nothing.\n\
    return None\n\
\n\
  def isatty(self):\n\
    return False\n\
\n\
  def write(self, s):\n\
    gdb.write(s, stream=gdb.STDOUT)\n   \
\n\
  def writelines(self, iterable):\n\
    for line in iterable:\n\
      self.write(line)\n\
\n\
  def flush(self):\n\
    gdb.flush()\n\
\n\
sys.stdout = GdbOutputFile()\n\
\n\
class GdbOutputErrorFile:\n\
  def close(self):\n\
    # Do nothing.\n\
    return None\n\
\n\
  def isatty(self):\n\
    return False\n\
\n\
  def write(self, s):\n\
    gdb.write(s, stream=gdb.STDERR)\n		\
\n\
  def writelines(self, iterable):\n\
    for line in iterable:\n\
      self.write(line)\n \
\n\
  def flush(self):\n\
    gdb.flush()\n\
\n\
sys.stderr = GdbOutputErrorFile()\n\
\n\
# Ideally this would live in the gdb module, but it's intentionally written\n\
# in python, and we need this to bootstrap the gdb module.\n\
\n\
def GdbSetPythonDirectory (dir):\n\
  \"Set gdb.PYTHONDIR and update sys.path,etc.\"\n\
  old_dir = gdb.PYTHONDIR\n\
  gdb.PYTHONDIR = dir\n\
  # GDB's python scripts are stored inside gdb.PYTHONDIR.  So insert\n\
  # that directory name at the start of sys.path to allow the Python\n\
  # interpreter to find them.\n\
  if old_dir in sys.path:\n\
    sys.path.remove (old_dir)\n\
  sys.path.insert (0, gdb.PYTHONDIR)\n\
\n\
  # Tell python where to find submodules of gdb.\n\
  gdb.__path__ = [os.path.join (gdb.PYTHONDIR, 'gdb')]\n\
\n\
  # The gdb module is implemented in C rather than in Python.  As a result,\n\
  # the associated __init.py__ script is not not executed by default when\n\
  # the gdb module gets imported.  Execute that script manually if it\n\
  # exists.\n\
  ipy = os.path.join (gdb.PYTHONDIR, 'gdb', '__init__.py')\n\
  if os.path.exists (ipy):\n\
    execfile (ipy)\n\
\n\
# Install the default gdb.PYTHONDIR.\n\
GdbSetPythonDirectory (gdb.PYTHONDIR)\n\
# Default prompt hook does nothing.\n\
prompt_hook = None\n\
");

  do_cleanups (cleanup);
}

#endif /* HAVE_PYTHON */



#ifdef HAVE_PYTHON

static PyMethodDef GdbMethods[] =
{
  { "history", gdbpy_history, METH_VARARGS,
    "Get a value from history" },
  { "execute", (PyCFunction) execute_gdb_command, METH_VARARGS | METH_KEYWORDS,
    "Execute a gdb command" },
  { "parameter", gdbpy_parameter, METH_VARARGS,
    "Return a gdb parameter's value" },

  { "breakpoints", gdbpy_breakpoints, METH_NOARGS,
    "Return a tuple of all breakpoint objects" },

  { "default_visualizer", gdbpy_default_visualizer, METH_VARARGS,
    "Find the default visualizer for a Value." },

  { "current_progspace", gdbpy_get_current_progspace, METH_NOARGS,
    "Return the current Progspace." },
  { "progspaces", gdbpy_progspaces, METH_NOARGS,
    "Return a sequence of all progspaces." },

  { "current_objfile", gdbpy_get_current_objfile, METH_NOARGS,
    "Return the current Objfile being loaded, or None." },
  { "objfiles", gdbpy_objfiles, METH_NOARGS,
    "Return a sequence of all loaded objfiles." },

  { "newest_frame", gdbpy_newest_frame, METH_NOARGS,
    "newest_frame () -> gdb.Frame.\n\
Return the newest frame object." },
  { "selected_frame", gdbpy_selected_frame, METH_NOARGS,
    "selected_frame () -> gdb.Frame.\n\
Return the selected frame object." },
  { "frame_stop_reason_string", gdbpy_frame_stop_reason_string, METH_VARARGS,
    "stop_reason_string (Integer) -> String.\n\
Return a string explaining unwind stop reason." },

  { "lookup_type", (PyCFunction) gdbpy_lookup_type,
    METH_VARARGS | METH_KEYWORDS,
    "lookup_type (name [, block]) -> type\n\
Return a Type corresponding to the given name." },
  { "lookup_symbol", (PyCFunction) gdbpy_lookup_symbol,
    METH_VARARGS | METH_KEYWORDS,
    "lookup_symbol (name [, block] [, domain]) -> (symbol, is_field_of_this)\n\
Return a tuple with the symbol corresponding to the given name (or None) and\n\
a boolean indicating if name is a field of the current implied argument\n\
`this' (when the current language is object-oriented)." },
  { "lookup_global_symbol", (PyCFunction) gdbpy_lookup_global_symbol,
    METH_VARARGS | METH_KEYWORDS,
    "lookup_global_symbol (name [, domain]) -> symbol\n\
Return the symbol corresponding to the given name (or None)." },
  { "block_for_pc", gdbpy_block_for_pc, METH_VARARGS,
    "Return the block containing the given pc value, or None." },
  { "solib_name", gdbpy_solib_name, METH_VARARGS,
    "solib_name (Long) -> String.\n\
Return the name of the shared library holding a given address, or None." },
  { "decode_line", gdbpy_decode_line, METH_VARARGS,
    "decode_line (String) -> Tuple.  Decode a string argument the way\n\
that 'break' or 'edit' does.  Return a tuple containing two elements.\n\
The first element contains any unparsed portion of the String parameter\n\
(or None if the string was fully parsed).  The second element contains\n\
a tuple that contains all the locations that match, represented as\n\
gdb.Symtab_and_line objects (or None)."},
  { "parse_and_eval", gdbpy_parse_and_eval, METH_VARARGS,
    "parse_and_eval (String) -> Value.\n\
Parse String as an expression, evaluate it, and return the result as a Value."
  },

  { "post_event", gdbpy_post_event, METH_VARARGS,
    "Post an event into gdb's event loop." },

  { "target_charset", gdbpy_target_charset, METH_NOARGS,
    "target_charset () -> string.\n\
Return the name of the current target charset." },
  { "target_wide_charset", gdbpy_target_wide_charset, METH_NOARGS,
    "target_wide_charset () -> string.\n\
Return the name of the current target wide charset." },

  { "string_to_argv", gdbpy_string_to_argv, METH_VARARGS,
    "string_to_argv (String) -> Array.\n\
Parse String and return an argv-like array.\n\
Arguments are separate by spaces and may be quoted."
  },
  { "write", (PyCFunction)gdbpy_write, METH_VARARGS | METH_KEYWORDS,
    "Write a string using gdb's filtered stream." },
  { "flush", (PyCFunction)gdbpy_flush, METH_VARARGS | METH_KEYWORDS,
    "Flush gdb's filtered stdout stream." },
  { "selected_thread", gdbpy_selected_thread, METH_NOARGS,
    "selected_thread () -> gdb.InferiorThread.\n\
Return the selected thread object." },
  { "selected_inferior", gdbpy_selected_inferior, METH_NOARGS,
    "selected_inferior () -> gdb.Inferior.\n\
Return the selected inferior object." },
  { "inferiors", gdbpy_inferiors, METH_NOARGS,
    "inferiors () -> (gdb.Inferior, ...).\n\
Return a tuple containing all inferiors." },
  {NULL, NULL, 0, NULL}
};

#endif /* HAVE_PYTHON */