Source

cpython-withatomic / Python / pythonrun.c

The branch '2.3' does not exist.
   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
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
/* Python interpreter top-level routines, including init/exit */

#include "Python.h"

#include "grammar.h"
#include "node.h"
#include "token.h"
#include "parsetok.h"
#include "errcode.h"
#include "compile.h"
#include "symtable.h"
#include "eval.h"
#include "marshal.h"

#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif

#ifdef HAVE_LANGINFO_H
#include <locale.h>
#include <langinfo.h>
#endif

#ifdef MS_WINDOWS
#undef BYTE
#include "windows.h"
#endif

#ifdef macintosh
#include "macglue.h"
#endif
extern char *Py_GetPath(void);

extern grammar _PyParser_Grammar; /* From graminit.c */

/* Forward */
static void initmain(void);
static void initsite(void);
static PyObject *run_err_node(node *, const char *, PyObject *, PyObject *,
			      PyCompilerFlags *);
static PyObject *run_node(node *, const char *, PyObject *, PyObject *,
			  PyCompilerFlags *);
static PyObject *run_pyc_file(FILE *, const char *, PyObject *, PyObject *,
			      PyCompilerFlags *);
static void err_input(perrdetail *);
static void initsigs(void);
static void call_sys_exitfunc(void);
static void call_ll_exitfuncs(void);
extern void _PyUnicode_Init(void);
extern void _PyUnicode_Fini(void);

#ifdef WITH_THREAD
extern void _PyGILState_Init(PyInterpreterState *, PyThreadState *);
extern void _PyGILState_Fini(void);
#endif /* WITH_THREAD */

int Py_DebugFlag; /* Needed by parser.c */
int Py_VerboseFlag; /* Needed by import.c */
int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */
int Py_NoSiteFlag; /* Suppress 'import site' */
int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c: deprecated */
int Py_FrozenFlag; /* Needed by getpath.c */
int Py_UnicodeFlag = 0; /* Needed by compile.c */
int Py_IgnoreEnvironmentFlag; /* e.g. PYTHONPATH, PYTHONHOME */
/* _XXX Py_QnewFlag should go away in 2.3.  It's true iff -Qnew is passed,
  on the command line, and is used in 2.2 by ceval.c to make all "/" divisions
  true divisions (which they will be in 2.3). */
int _Py_QnewFlag = 0;

/* Reference to 'warnings' module, to avoid importing it
   on the fly when the import lock may be held.  See 683658/771097
*/
static PyObject *warnings_module = NULL;

/* Returns a borrowed reference to the 'warnings' module, or NULL.
   If the module is returned, it is guaranteed to have been obtained
   without acquiring the import lock
*/
PyObject *PyModule_GetWarningsModule(void)
{
	PyObject *typ, *val, *tb;
	PyObject *all_modules;
	/* If we managed to get the module at init time, just use it */
	if (warnings_module)
		return warnings_module;
	/* If it wasn't available at init time, it may be available
	   now in sys.modules (common scenario is frozen apps: import
	   at init time fails, but the frozen init code sets up sys.path
	   correctly, then does an implicit import of warnings for us
	*/
	/* Save and restore any exceptions */
	PyErr_Fetch(&typ, &val, &tb);

	all_modules = PySys_GetObject("modules");
	if (all_modules) {
		warnings_module = PyDict_GetItemString(all_modules, "warnings");
		/* We keep a ref in the global */
		Py_XINCREF(warnings_module);
	}
	PyErr_Restore(typ, val, tb);
	return warnings_module;
}

static int initialized = 0;

/* API to access the initialized flag -- useful for esoteric use */

int
Py_IsInitialized(void)
{
	return initialized;
}

/* Global initializations.  Can be undone by Py_Finalize().  Don't
   call this twice without an intervening Py_Finalize() call.  When
   initializations fail, a fatal error is issued and the function does
   not return.  On return, the first thread and interpreter state have
   been created.

   Locking: you must hold the interpreter lock while calling this.
   (If the lock has not yet been initialized, that's equivalent to
   having the lock, but you cannot use multiple threads.)

*/

static int
add_flag(int flag, const char *envs)
{
	int env = atoi(envs);
	if (flag < env)
		flag = env;
	if (flag < 1)
		flag = 1;
	return flag;
}

void
Py_Initialize(void)
{
	PyInterpreterState *interp;
	PyThreadState *tstate;
	PyObject *bimod, *sysmod;
	char *p;
#if defined(Py_USING_UNICODE) && defined(HAVE_LANGINFO_H) && defined(CODESET)
	char *codeset;
	char *saved_locale;
	PyObject *sys_stream, *sys_isatty;
#endif
	extern void _Py_ReadyTypes(void);

	if (initialized)
		return;
	initialized = 1;

	if ((p = Py_GETENV("PYTHONDEBUG")) && *p != '\0')
		Py_DebugFlag = add_flag(Py_DebugFlag, p);
	if ((p = Py_GETENV("PYTHONVERBOSE")) && *p != '\0')
		Py_VerboseFlag = add_flag(Py_VerboseFlag, p);
	if ((p = Py_GETENV("PYTHONOPTIMIZE")) && *p != '\0')
		Py_OptimizeFlag = add_flag(Py_OptimizeFlag, p);

	interp = PyInterpreterState_New();
	if (interp == NULL)
		Py_FatalError("Py_Initialize: can't make first interpreter");

	tstate = PyThreadState_New(interp);
	if (tstate == NULL)
		Py_FatalError("Py_Initialize: can't make first thread");
	(void) PyThreadState_Swap(tstate);

	_Py_ReadyTypes();

	if (!_PyFrame_Init())
		Py_FatalError("Py_Initialize: can't init frames");

	if (!_PyInt_Init())
		Py_FatalError("Py_Initialize: can't init ints");

	interp->modules = PyDict_New();
	if (interp->modules == NULL)
		Py_FatalError("Py_Initialize: can't make modules dictionary");

#ifdef Py_USING_UNICODE
	/* Init Unicode implementation; relies on the codec registry */
	_PyUnicode_Init();
#endif

	bimod = _PyBuiltin_Init();
	if (bimod == NULL)
		Py_FatalError("Py_Initialize: can't initialize __builtin__");
	interp->builtins = PyModule_GetDict(bimod);
	Py_INCREF(interp->builtins);

	sysmod = _PySys_Init();
	if (sysmod == NULL)
		Py_FatalError("Py_Initialize: can't initialize sys");
	interp->sysdict = PyModule_GetDict(sysmod);
	Py_INCREF(interp->sysdict);
	_PyImport_FixupExtension("sys", "sys");
	PySys_SetPath(Py_GetPath());
	PyDict_SetItemString(interp->sysdict, "modules",
			     interp->modules);

	_PyImport_Init();

	/* initialize builtin exceptions */
	_PyExc_Init();
	_PyImport_FixupExtension("exceptions", "exceptions");

	/* phase 2 of builtins */
	_PyImport_FixupExtension("__builtin__", "__builtin__");

	_PyImportHooks_Init();

	initsigs(); /* Signal handling stuff, including initintr() */

	initmain(); /* Module __main__ */
	if (!Py_NoSiteFlag)
		initsite(); /* Module site */

	/* auto-thread-state API, if available */
#ifdef WITH_THREAD
	_PyGILState_Init(interp, tstate);
#endif /* WITH_THREAD */

	warnings_module = PyImport_ImportModule("warnings");
	if (!warnings_module)
		PyErr_Clear();

#if defined(Py_USING_UNICODE) && defined(HAVE_LANGINFO_H) && defined(CODESET)
	/* On Unix, set the file system encoding according to the
	   user's preference, if the CODESET names a well-known
	   Python codec, and Py_FileSystemDefaultEncoding isn't
	   initialized by other means. Also set the encoding of
	   stdin and stdout if these are terminals.  */

	saved_locale = strdup(setlocale(LC_CTYPE, NULL));
	setlocale(LC_CTYPE, "");
	codeset = nl_langinfo(CODESET);
	if (codeset && *codeset) {
		PyObject *enc = PyCodec_Encoder(codeset);
		if (enc) {
			codeset = strdup(codeset);
			Py_DECREF(enc);
		} else {
			codeset = NULL;
			PyErr_Clear();
		}
	} else
		codeset = NULL;
	setlocale(LC_CTYPE, saved_locale);
	free(saved_locale);

	if (codeset) {
		sys_stream = PySys_GetObject("stdin");
		sys_isatty = PyObject_CallMethod(sys_stream, "isatty", "");
		if (!sys_isatty)
			PyErr_Clear();
		if(sys_isatty && PyObject_IsTrue(sys_isatty)) {
			if (!PyFile_SetEncoding(sys_stream, codeset))
				Py_FatalError("Cannot set codeset of stdin");
		}
		Py_XDECREF(sys_isatty);

		sys_stream = PySys_GetObject("stdout");
		sys_isatty = PyObject_CallMethod(sys_stream, "isatty", "");
		if (!sys_isatty)
			PyErr_Clear();
		if(sys_isatty && PyObject_IsTrue(sys_isatty)) {
			if (!PyFile_SetEncoding(sys_stream, codeset))
				Py_FatalError("Cannot set codeset of stdout");
		}
		Py_XDECREF(sys_isatty);

		if (!Py_FileSystemDefaultEncoding)
			Py_FileSystemDefaultEncoding = codeset;
		else
			free(codeset);
	}
#endif
}

#ifdef COUNT_ALLOCS
extern void dump_counts(void);
#endif

/* Undo the effect of Py_Initialize().

   Beware: if multiple interpreter and/or thread states exist, these
   are not wiped out; only the current thread and interpreter state
   are deleted.  But since everything else is deleted, those other
   interpreter and thread states should no longer be used.

   (XXX We should do better, e.g. wipe out all interpreters and
   threads.)

   Locking: as above.

*/

void
Py_Finalize(void)
{
	PyInterpreterState *interp;
	PyThreadState *tstate;

	if (!initialized)
		return;

	/* The interpreter is still entirely intact at this point, and the
	 * exit funcs may be relying on that.  In particular, if some thread
	 * or exit func is still waiting to do an import, the import machinery
	 * expects Py_IsInitialized() to return true.  So don't say the
	 * interpreter is uninitialized until after the exit funcs have run.
	 * Note that Threading.py uses an exit func to do a join on all the
	 * threads created thru it, so this also protects pending imports in
	 * the threads created via Threading.
	 */
	call_sys_exitfunc();
	initialized = 0;

	/* Get current thread state and interpreter pointer */
	tstate = PyThreadState_Get();
	interp = tstate->interp;

	/* Disable signal handling */
	PyOS_FiniInterrupts();

	/* drop module references we saved */
	Py_XDECREF(warnings_module);
	warnings_module = NULL;

	/* Collect garbage.  This may call finalizers; it's nice to call these
	 * before all modules are destroyed.
	 * XXX If a __del__ or weakref callback is triggered here, and tries to
	 * XXX import a module, bad things can happen, because Python no
	 * XXX longer believes it's initialized.
	 * XXX     Fatal Python error: Interpreter not initialized (version mismatch?)
	 * XXX is easy to provoke that way.  I've also seen, e.g.,
	 * XXX     Exception exceptions.ImportError: 'No module named sha'
	 * XXX         in <function callback at 0x008F5718> ignored
	 * XXX but I'm unclear on exactly how that one happens.  In any case,
	 * XXX I haven't seen a real-life report of either of these.
         */
	PyGC_Collect();

	/* Destroy all modules */
	PyImport_Cleanup();

	/* Collect final garbage.  This disposes of cycles created by
	 * new-style class definitions, for example.
	 * XXX This is disabled because it caused too many problems.  If
	 * XXX a __del__ or weakref callback triggers here, Python code has
	 * XXX a hard time running, because even the sys module has been
	 * XXX cleared out (sys.stdout is gone, sys.excepthook is gone, etc).
	 * XXX One symptom is a sequence of information-free messages
	 * XXX coming from threads (if a __del__ or callback is invoked,
	 * XXX other threads can execute too, and any exception they encounter
	 * XXX triggers a comedy of errors as subsystem after subsystem
	 * XXX fails to find what it *expects* to find in sys to help report
	 * XXX the exception and consequent unexpected failures).  I've also
	 * XXX seen segfaults then, after adding print statements to the
	 * XXX Python code getting called.
	 */
#if 0
	PyGC_Collect();
#endif

	/* Destroy the database used by _PyImport_{Fixup,Find}Extension */
	_PyImport_Fini();

	/* Debugging stuff */
#ifdef COUNT_ALLOCS
	dump_counts();
#endif

#ifdef Py_REF_DEBUG
	fprintf(stderr, "[%ld refs]\n", _Py_RefTotal);
#endif

#ifdef Py_TRACE_REFS
	/* Display all objects still alive -- this can invoke arbitrary
	 * __repr__ overrides, so requires a mostly-intact interpreter.
	 * Alas, a lot of stuff may still be alive now that will be cleaned
	 * up later.
	 */
	if (Py_GETENV("PYTHONDUMPREFS"))
		_Py_PrintReferences(stderr);
#endif /* Py_TRACE_REFS */

	/* Now we decref the exception classes.  After this point nothing
	   can raise an exception.  That's okay, because each Fini() method
	   below has been checked to make sure no exceptions are ever
	   raised.
	*/
	_PyExc_Fini();

	/* Cleanup auto-thread-state */
#ifdef WITH_THREAD
	_PyGILState_Fini();
#endif /* WITH_THREAD */

	/* Clear interpreter state */
	PyInterpreterState_Clear(interp);

	/* Delete current thread */
	PyThreadState_Swap(NULL);
	PyInterpreterState_Delete(interp);

	/* Sundry finalizers */
	PyMethod_Fini();
	PyFrame_Fini();
	PyCFunction_Fini();
	PyTuple_Fini();
	PyString_Fini();
	PyInt_Fini();
	PyFloat_Fini();

#ifdef Py_USING_UNICODE
	/* Cleanup Unicode implementation */
	_PyUnicode_Fini();
#endif

	/* XXX Still allocated:
	   - various static ad-hoc pointers to interned strings
	   - int and float free list blocks
	   - whatever various modules and libraries allocate
	*/

	PyGrammar_RemoveAccelerators(&_PyParser_Grammar);

#ifdef Py_TRACE_REFS
	/* Display addresses (& refcnts) of all objects still alive.
	 * An address can be used to find the repr of the object, printed
	 * above by _Py_PrintReferences.
	 */
	if (Py_GETENV("PYTHONDUMPREFS"))
		_Py_PrintReferenceAddresses(stderr);
#endif /* Py_TRACE_REFS */
#ifdef PYMALLOC_DEBUG
	if (Py_GETENV("PYTHONMALLOCSTATS"))
		_PyObject_DebugMallocStats();
#endif

	call_ll_exitfuncs();
}

/* Create and initialize a new interpreter and thread, and return the
   new thread.  This requires that Py_Initialize() has been called
   first.

   Unsuccessful initialization yields a NULL pointer.  Note that *no*
   exception information is available even in this case -- the
   exception information is held in the thread, and there is no
   thread.

   Locking: as above.

*/

PyThreadState *
Py_NewInterpreter(void)
{
	PyInterpreterState *interp;
	PyThreadState *tstate, *save_tstate;
	PyObject *bimod, *sysmod;

	if (!initialized)
		Py_FatalError("Py_NewInterpreter: call Py_Initialize first");

	interp = PyInterpreterState_New();
	if (interp == NULL)
		return NULL;

	tstate = PyThreadState_New(interp);
	if (tstate == NULL) {
		PyInterpreterState_Delete(interp);
		return NULL;
	}

	save_tstate = PyThreadState_Swap(tstate);

	/* XXX The following is lax in error checking */

	interp->modules = PyDict_New();

	bimod = _PyImport_FindExtension("__builtin__", "__builtin__");
	if (bimod != NULL) {
		interp->builtins = PyModule_GetDict(bimod);
		Py_INCREF(interp->builtins);
	}
	sysmod = _PyImport_FindExtension("sys", "sys");
	if (bimod != NULL && sysmod != NULL) {
		interp->sysdict = PyModule_GetDict(sysmod);
		Py_INCREF(interp->sysdict);
		PySys_SetPath(Py_GetPath());
		PyDict_SetItemString(interp->sysdict, "modules",
				     interp->modules);
		_PyImportHooks_Init();
		initmain();
		if (!Py_NoSiteFlag)
			initsite();
	}

	if (!PyErr_Occurred())
		return tstate;

	/* Oops, it didn't work.  Undo it all. */

	PyErr_Print();
	PyThreadState_Clear(tstate);
	PyThreadState_Swap(save_tstate);
	PyThreadState_Delete(tstate);
	PyInterpreterState_Delete(interp);

	return NULL;
}

/* Delete an interpreter and its last thread.  This requires that the
   given thread state is current, that the thread has no remaining
   frames, and that it is its interpreter's only remaining thread.
   It is a fatal error to violate these constraints.

   (Py_Finalize() doesn't have these constraints -- it zaps
   everything, regardless.)

   Locking: as above.

*/

void
Py_EndInterpreter(PyThreadState *tstate)
{
	PyInterpreterState *interp = tstate->interp;

	if (tstate != PyThreadState_Get())
		Py_FatalError("Py_EndInterpreter: thread is not current");
	if (tstate->frame != NULL)
		Py_FatalError("Py_EndInterpreter: thread still has a frame");
	if (tstate != interp->tstate_head || tstate->next != NULL)
		Py_FatalError("Py_EndInterpreter: not the last thread");

	PyImport_Cleanup();
	PyInterpreterState_Clear(interp);
	PyThreadState_Swap(NULL);
	PyInterpreterState_Delete(interp);
}

static char *progname = "python";

void
Py_SetProgramName(char *pn)
{
	if (pn && *pn)
		progname = pn;
}

char *
Py_GetProgramName(void)
{
	return progname;
}

static char *default_home = NULL;

void
Py_SetPythonHome(char *home)
{
	default_home = home;
}

char *
Py_GetPythonHome(void)
{
	char *home = default_home;
	if (home == NULL && !Py_IgnoreEnvironmentFlag)
		home = Py_GETENV("PYTHONHOME");
	return home;
}

/* Create __main__ module */

static void
initmain(void)
{
	PyObject *m, *d;
	m = PyImport_AddModule("__main__");
	if (m == NULL)
		Py_FatalError("can't create __main__ module");
	d = PyModule_GetDict(m);
	if (PyDict_GetItemString(d, "__builtins__") == NULL) {
		PyObject *bimod = PyImport_ImportModule("__builtin__");
		if (bimod == NULL ||
		    PyDict_SetItemString(d, "__builtins__", bimod) != 0)
			Py_FatalError("can't add __builtins__ to __main__");
		Py_DECREF(bimod);
	}
}

/* Import the site module (not into __main__ though) */

static void
initsite(void)
{
	PyObject *m, *f;
	m = PyImport_ImportModule("site");
	if (m == NULL) {
		f = PySys_GetObject("stderr");
		if (Py_VerboseFlag) {
			PyFile_WriteString(
				"'import site' failed; traceback:\n", f);
			PyErr_Print();
		}
		else {
			PyFile_WriteString(
			  "'import site' failed; use -v for traceback\n", f);
			PyErr_Clear();
		}
	}
	else {
		Py_DECREF(m);
	}
}

/* Parse input from a file and execute it */

int
PyRun_AnyFile(FILE *fp, const char *filename)
{
	return PyRun_AnyFileExFlags(fp, filename, 0, NULL);
}

int
PyRun_AnyFileFlags(FILE *fp, const char *filename, PyCompilerFlags *flags)
{
	return PyRun_AnyFileExFlags(fp, filename, 0, flags);
}

int
PyRun_AnyFileEx(FILE *fp, const char *filename, int closeit)
{
	return PyRun_AnyFileExFlags(fp, filename, closeit, NULL);
}

int
PyRun_AnyFileExFlags(FILE *fp, const char *filename, int closeit,
		     PyCompilerFlags *flags)
{
	if (filename == NULL)
		filename = "???";
	if (Py_FdIsInteractive(fp, filename)) {
		int err = PyRun_InteractiveLoopFlags(fp, filename, flags);
		if (closeit)
			fclose(fp);
		return err;
	}
	else
		return PyRun_SimpleFileExFlags(fp, filename, closeit, flags);
}

int
PyRun_InteractiveLoop(FILE *fp, const char *filename)
{
	return PyRun_InteractiveLoopFlags(fp, filename, NULL);
}

int
PyRun_InteractiveLoopFlags(FILE *fp, const char *filename, PyCompilerFlags *flags)
{
	PyObject *v;
	int ret;
	PyCompilerFlags local_flags;

	if (flags == NULL) {
		flags = &local_flags;
		local_flags.cf_flags = 0;
	}
	v = PySys_GetObject("ps1");
	if (v == NULL) {
		PySys_SetObject("ps1", v = PyString_FromString(">>> "));
		Py_XDECREF(v);
	}
	v = PySys_GetObject("ps2");
	if (v == NULL) {
		PySys_SetObject("ps2", v = PyString_FromString("... "));
		Py_XDECREF(v);
	}
	for (;;) {
		ret = PyRun_InteractiveOneFlags(fp, filename, flags);
#ifdef Py_REF_DEBUG
		fprintf(stderr, "[%ld refs]\n", _Py_RefTotal);
#endif
		if (ret == E_EOF)
			return 0;
		/*
		if (ret == E_NOMEM)
			return -1;
		*/
	}
}

int
PyRun_InteractiveOne(FILE *fp, const char *filename)
{
	return PyRun_InteractiveOneFlags(fp, filename, NULL);
}

/* compute parser flags based on compiler flags */
#define PARSER_FLAGS(flags) \
	(((flags) && (flags)->cf_flags & PyCF_DONT_IMPLY_DEDENT) ? \
		PyPARSE_DONT_IMPLY_DEDENT : 0)

int
PyRun_InteractiveOneFlags(FILE *fp, const char *filename, PyCompilerFlags *flags)
{
	PyObject *m, *d, *v, *w;
	node *n;
	perrdetail err;
	char *ps1 = "", *ps2 = "";

	v = PySys_GetObject("ps1");
	if (v != NULL) {
		v = PyObject_Str(v);
		if (v == NULL)
			PyErr_Clear();
		else if (PyString_Check(v))
			ps1 = PyString_AsString(v);
	}
	w = PySys_GetObject("ps2");
	if (w != NULL) {
		w = PyObject_Str(w);
		if (w == NULL)
			PyErr_Clear();
		else if (PyString_Check(w))
			ps2 = PyString_AsString(w);
	}
	n = PyParser_ParseFileFlags(fp, filename, &_PyParser_Grammar,
			    	    Py_single_input, ps1, ps2, &err,
			    	    PARSER_FLAGS(flags));
	Py_XDECREF(v);
	Py_XDECREF(w);
	if (n == NULL) {
		if (err.error == E_EOF) {
			if (err.text)
				PyMem_DEL(err.text);
			return E_EOF;
		}
		err_input(&err);
		PyErr_Print();
		return err.error;
	}
	m = PyImport_AddModule("__main__");
	if (m == NULL)
		return -1;
	d = PyModule_GetDict(m);
	v = run_node(n, filename, d, d, flags);
	if (v == NULL) {
		PyErr_Print();
		return -1;
	}
	Py_DECREF(v);
	if (Py_FlushLine())
		PyErr_Clear();
	return 0;
}

int
PyRun_SimpleFile(FILE *fp, const char *filename)
{
	return PyRun_SimpleFileEx(fp, filename, 0);
}

/* Check whether a file maybe a pyc file: Look at the extension,
   the file type, and, if we may close it, at the first few bytes. */

static int
maybe_pyc_file(FILE *fp, const char* filename, const char* ext, int closeit)
{
	if (strcmp(ext, ".pyc") == 0 || strcmp(ext, ".pyo") == 0)
		return 1;

#ifdef macintosh
	/* On a mac, we also assume a pyc file for types 'PYC ' and 'APPL' */
	if (PyMac_getfiletype((char *)filename) == 'PYC '
	    || PyMac_getfiletype((char *)filename) == 'APPL')
		return 1;
#endif /* macintosh */

	/* Only look into the file if we are allowed to close it, since
	   it then should also be seekable. */
	if (closeit) {
		/* Read only two bytes of the magic. If the file was opened in
		   text mode, the bytes 3 and 4 of the magic (\r\n) might not
		   be read as they are on disk. */
		unsigned int halfmagic = PyImport_GetMagicNumber() & 0xFFFF;
		unsigned char buf[2];
		/* Mess:  In case of -x, the stream is NOT at its start now,
		   and ungetc() was used to push back the first newline,
		   which makes the current stream position formally undefined,
		   and a x-platform nightmare.
		   Unfortunately, we have no direct way to know whether -x
		   was specified.  So we use a terrible hack:  if the current
		   stream position is not 0, we assume -x was specified, and
		   give up.  Bug 132850 on SourceForge spells out the
		   hopelessness of trying anything else (fseek and ftell
		   don't work predictably x-platform for text-mode files).
		*/
		int ispyc = 0;
		if (ftell(fp) == 0) {
			if (fread(buf, 1, 2, fp) == 2 &&
			    ((unsigned int)buf[1]<<8 | buf[0]) == halfmagic)
				ispyc = 1;
			rewind(fp);
		}
		return ispyc;
	}
	return 0;
}

int
PyRun_SimpleFileEx(FILE *fp, const char *filename, int closeit)
{
	return PyRun_SimpleFileExFlags(fp, filename, closeit, NULL);
}

int
PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit,
			PyCompilerFlags *flags)
{
	PyObject *m, *d, *v;
	const char *ext;

	m = PyImport_AddModule("__main__");
	if (m == NULL)
		return -1;
	d = PyModule_GetDict(m);
	if (PyDict_GetItemString(d, "__file__") == NULL) {
		PyObject *f = PyString_FromString(filename);
		if (f == NULL)
			return -1;
		if (PyDict_SetItemString(d, "__file__", f) < 0) {
			Py_DECREF(f);
			return -1;
		}
		Py_DECREF(f);
	}
	ext = filename + strlen(filename) - 4;
	if (maybe_pyc_file(fp, filename, ext, closeit)) {
		/* Try to run a pyc file. First, re-open in binary */
		if (closeit)
			fclose(fp);
		if ((fp = fopen(filename, "rb")) == NULL) {
			fprintf(stderr, "python: Can't reopen .pyc file\n");
			return -1;
		}
		/* Turn on optimization if a .pyo file is given */
		if (strcmp(ext, ".pyo") == 0)
			Py_OptimizeFlag = 1;
		v = run_pyc_file(fp, filename, d, d, flags);
	} else {
		v = PyRun_FileExFlags(fp, filename, Py_file_input, d, d,
				      closeit, flags);
	}
	if (v == NULL) {
		PyErr_Print();
		return -1;
	}
	Py_DECREF(v);
	if (Py_FlushLine())
		PyErr_Clear();
	return 0;
}

int
PyRun_SimpleString(const char *command)
{
	return PyRun_SimpleStringFlags(command, NULL);
}

int
PyRun_SimpleStringFlags(const char *command, PyCompilerFlags *flags)
{
	PyObject *m, *d, *v;
	m = PyImport_AddModule("__main__");
	if (m == NULL)
		return -1;
	d = PyModule_GetDict(m);
	v = PyRun_StringFlags(command, Py_file_input, d, d, flags);
	if (v == NULL) {
		PyErr_Print();
		return -1;
	}
	Py_DECREF(v);
	if (Py_FlushLine())
		PyErr_Clear();
	return 0;
}

static int
parse_syntax_error(PyObject *err, PyObject **message, const char **filename,
		   int *lineno, int *offset, const char **text)
{
	long hold;
	PyObject *v;

	/* old style errors */
	if (PyTuple_Check(err))
		return PyArg_ParseTuple(err, "O(ziiz)", message, filename,
				        lineno, offset, text);

	/* new style errors.  `err' is an instance */

	if (! (v = PyObject_GetAttrString(err, "msg")))
		goto finally;
	*message = v;

	if (!(v = PyObject_GetAttrString(err, "filename")))
		goto finally;
	if (v == Py_None)
		*filename = NULL;
	else if (! (*filename = PyString_AsString(v)))
		goto finally;

	Py_DECREF(v);
	if (!(v = PyObject_GetAttrString(err, "lineno")))
		goto finally;
	hold = PyInt_AsLong(v);
	Py_DECREF(v);
	v = NULL;
	if (hold < 0 && PyErr_Occurred())
		goto finally;
	*lineno = (int)hold;

	if (!(v = PyObject_GetAttrString(err, "offset")))
		goto finally;
	if (v == Py_None) {
		*offset = -1;
		Py_DECREF(v);
		v = NULL;
	} else {
		hold = PyInt_AsLong(v);
		Py_DECREF(v);
		v = NULL;
		if (hold < 0 && PyErr_Occurred())
			goto finally;
		*offset = (int)hold;
	}

	if (!(v = PyObject_GetAttrString(err, "text")))
		goto finally;
	if (v == Py_None)
		*text = NULL;
	else if (! (*text = PyString_AsString(v)))
		goto finally;
	Py_DECREF(v);
	return 1;

finally:
	Py_XDECREF(v);
	return 0;
}

void
PyErr_Print(void)
{
	PyErr_PrintEx(1);
}

static void
print_error_text(PyObject *f, int offset, const char *text)
{
	char *nl;
	if (offset >= 0) {
		if (offset > 0 && offset == (int)strlen(text))
			offset--;
		for (;;) {
			nl = strchr(text, '\n');
			if (nl == NULL || nl-text >= offset)
				break;
			offset -= (nl+1-text);
			text = nl+1;
		}
		while (*text == ' ' || *text == '\t') {
			text++;
			offset--;
		}
	}
	PyFile_WriteString("    ", f);
	PyFile_WriteString(text, f);
	if (*text == '\0' || text[strlen(text)-1] != '\n')
		PyFile_WriteString("\n", f);
	if (offset == -1)
		return;
	PyFile_WriteString("    ", f);
	offset--;
	while (offset > 0) {
		PyFile_WriteString(" ", f);
		offset--;
	}
	PyFile_WriteString("^\n", f);
}

static void
handle_system_exit(void)
{
        PyObject *exception, *value, *tb;
        int exitcode = 0;

	PyErr_Fetch(&exception, &value, &tb);
	if (Py_FlushLine())
		PyErr_Clear();
	fflush(stdout);
	if (value == NULL || value == Py_None)
		goto done;
	if (PyInstance_Check(value)) {
		/* The error code should be in the `code' attribute. */
		PyObject *code = PyObject_GetAttrString(value, "code");
		if (code) {
			Py_DECREF(value);
			value = code;
			if (value == Py_None)
				goto done;
		}
		/* If we failed to dig out the 'code' attribute,
		   just let the else clause below print the error. */
	}
	if (PyInt_Check(value))
		exitcode = (int)PyInt_AsLong(value);
	else {
		PyObject_Print(value, stderr, Py_PRINT_RAW);
		PySys_WriteStderr("\n");
		exitcode = 1;
	}
 done:
 	/* Restore and clear the exception info, in order to properly decref
 	 * the exception, value, and traceback.  If we just exit instead,
 	 * these leak, which confuses PYTHONDUMPREFS output, and may prevent
 	 * some finalizers from running.
 	 */
	PyErr_Restore(exception, value, tb);
	PyErr_Clear();
	Py_Exit(exitcode);
	/* NOTREACHED */
}

void
PyErr_PrintEx(int set_sys_last_vars)
{
	PyObject *exception, *v, *tb, *hook;

	if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
		handle_system_exit();
	}
	PyErr_Fetch(&exception, &v, &tb);
	PyErr_NormalizeException(&exception, &v, &tb);
	if (exception == NULL)
		return;
	if (set_sys_last_vars) {
		PySys_SetObject("last_type", exception);
		PySys_SetObject("last_value", v);
		PySys_SetObject("last_traceback", tb);
	}
	hook = PySys_GetObject("excepthook");
	if (hook) {
		PyObject *args = Py_BuildValue("(OOO)",
                    exception, v ? v : Py_None, tb ? tb : Py_None);
		PyObject *result = PyEval_CallObject(hook, args);
		if (result == NULL) {
			PyObject *exception2, *v2, *tb2;
			if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
				handle_system_exit();
			}
			PyErr_Fetch(&exception2, &v2, &tb2);
			PyErr_NormalizeException(&exception2, &v2, &tb2);
			if (Py_FlushLine())
				PyErr_Clear();
			fflush(stdout);
			PySys_WriteStderr("Error in sys.excepthook:\n");
			PyErr_Display(exception2, v2, tb2);
			PySys_WriteStderr("\nOriginal exception was:\n");
			PyErr_Display(exception, v, tb);
			Py_XDECREF(exception2);
			Py_XDECREF(v2);
			Py_XDECREF(tb2);
		}
		Py_XDECREF(result);
		Py_XDECREF(args);
	} else {
		PySys_WriteStderr("sys.excepthook is missing\n");
		PyErr_Display(exception, v, tb);
	}
	Py_XDECREF(exception);
	Py_XDECREF(v);
	Py_XDECREF(tb);
}

void PyErr_Display(PyObject *exception, PyObject *value, PyObject *tb)
{
	int err = 0;
	PyObject *f = PySys_GetObject("stderr");
	Py_INCREF(value);
	if (f == NULL)
		fprintf(stderr, "lost sys.stderr\n");
	else {
		if (Py_FlushLine())
			PyErr_Clear();
		fflush(stdout);
		if (tb && tb != Py_None)
			err = PyTraceBack_Print(tb, f);
		if (err == 0 &&
		    PyObject_HasAttrString(value, "print_file_and_line"))
		{
			PyObject *message;
			const char *filename, *text;
			int lineno, offset;
			if (!parse_syntax_error(value, &message, &filename,
						&lineno, &offset, &text))
				PyErr_Clear();
			else {
				char buf[10];
				PyFile_WriteString("  File \"", f);
				if (filename == NULL)
					PyFile_WriteString("<string>", f);
				else
					PyFile_WriteString(filename, f);
				PyFile_WriteString("\", line ", f);
				PyOS_snprintf(buf, sizeof(buf), "%d", lineno);
				PyFile_WriteString(buf, f);
				PyFile_WriteString("\n", f);
				if (text != NULL)
					print_error_text(f, offset, text);
				Py_DECREF(value);
				value = message;
				/* Can't be bothered to check all those
				   PyFile_WriteString() calls */
				if (PyErr_Occurred())
					err = -1;
			}
		}
		if (err) {
			/* Don't do anything else */
		}
		else if (PyClass_Check(exception)) {
			PyClassObject* exc = (PyClassObject*)exception;
			PyObject* className = exc->cl_name;
			PyObject* moduleName =
			      PyDict_GetItemString(exc->cl_dict, "__module__");

			if (moduleName == NULL)
				err = PyFile_WriteString("<unknown>", f);
			else {
				char* modstr = PyString_AsString(moduleName);
				if (modstr && strcmp(modstr, "exceptions"))
				{
					err = PyFile_WriteString(modstr, f);
					err += PyFile_WriteString(".", f);
				}
			}
			if (err == 0) {
				if (className == NULL)
				      err = PyFile_WriteString("<unknown>", f);
				else
				      err = PyFile_WriteObject(className, f,
							       Py_PRINT_RAW);
			}
		}
		else
			err = PyFile_WriteObject(exception, f, Py_PRINT_RAW);
		if (err == 0) {
			if (value != Py_None) {
				PyObject *s = PyObject_Str(value);
				/* only print colon if the str() of the
				   object is not the empty string
				*/
				if (s == NULL)
					err = -1;
				else if (!PyString_Check(s) ||
					 PyString_GET_SIZE(s) != 0)
					err = PyFile_WriteString(": ", f);
				if (err == 0)
				  err = PyFile_WriteObject(s, f, Py_PRINT_RAW);
				Py_XDECREF(s);
			}
		}
		if (err == 0)
			err = PyFile_WriteString("\n", f);
	}
	Py_DECREF(value);
	/* If an error happened here, don't show it.
	   XXX This is wrong, but too many callers rely on this behavior. */
	if (err != 0)
		PyErr_Clear();
}

PyObject *
PyRun_String(const char *str, int start, PyObject *globals, PyObject *locals)
{
	return run_err_node(PyParser_SimpleParseString(str, start),
			    "<string>", globals, locals, NULL);
}

PyObject *
PyRun_File(FILE *fp, const char *filename, int start, PyObject *globals,
	   PyObject *locals)
{
	return PyRun_FileEx(fp, filename, start, globals, locals, 0);
}

PyObject *
PyRun_FileEx(FILE *fp, const char *filename, int start, PyObject *globals,
	     PyObject *locals, int closeit)
{
	node *n = PyParser_SimpleParseFile(fp, filename, start);
	if (closeit)
		fclose(fp);
	return run_err_node(n, filename, globals, locals, NULL);
}

PyObject *
PyRun_StringFlags(const char *str, int start, PyObject *globals, PyObject *locals,
		  PyCompilerFlags *flags)
{
	return run_err_node(PyParser_SimpleParseStringFlags(
				    str, start, PARSER_FLAGS(flags)),
			    "<string>", globals, locals, flags);
}

PyObject *
PyRun_FileFlags(FILE *fp, const char *filename, int start, PyObject *globals,
		PyObject *locals, PyCompilerFlags *flags)
{
	return PyRun_FileExFlags(fp, filename, start, globals, locals, 0,
				 flags);
}

PyObject *
PyRun_FileExFlags(FILE *fp, const char *filename, int start, PyObject *globals,
		  PyObject *locals, int closeit, PyCompilerFlags *flags)
{
	node *n = PyParser_SimpleParseFileFlags(fp, filename, start,
						PARSER_FLAGS(flags));
	if (closeit)
		fclose(fp);
	return run_err_node(n, filename, globals, locals, flags);
}

static PyObject *
run_err_node(node *n, const char *filename, PyObject *globals, PyObject *locals,
	     PyCompilerFlags *flags)
{
	if (n == NULL)
		return  NULL;
	return run_node(n, filename, globals, locals, flags);
}

static PyObject *
run_node(node *n, const char *filename, PyObject *globals, PyObject *locals,
	 PyCompilerFlags *flags)
{
	PyCodeObject *co;
	PyObject *v;
	co = PyNode_CompileFlags(n, filename, flags);
	PyNode_Free(n);
	if (co == NULL)
		return NULL;
	v = PyEval_EvalCode(co, globals, locals);
	Py_DECREF(co);
	return v;
}

static PyObject *
run_pyc_file(FILE *fp, const char *filename, PyObject *globals, PyObject *locals,
	     PyCompilerFlags *flags)
{
	PyCodeObject *co;
	PyObject *v;
	long magic;
	long PyImport_GetMagicNumber(void);

	magic = PyMarshal_ReadLongFromFile(fp);
	if (magic != PyImport_GetMagicNumber()) {
		PyErr_SetString(PyExc_RuntimeError,
			   "Bad magic number in .pyc file");
		return NULL;
	}
	(void) PyMarshal_ReadLongFromFile(fp);
	v = PyMarshal_ReadLastObjectFromFile(fp);
	fclose(fp);
	if (v == NULL || !PyCode_Check(v)) {
		Py_XDECREF(v);
		PyErr_SetString(PyExc_RuntimeError,
			   "Bad code object in .pyc file");
		return NULL;
	}
	co = (PyCodeObject *)v;
	v = PyEval_EvalCode(co, globals, locals);
	if (v && flags)
		flags->cf_flags |= (co->co_flags & PyCF_MASK);
	Py_DECREF(co);
	return v;
}

PyObject *
Py_CompileString(const char *str, const char *filename, int start)
{
	return Py_CompileStringFlags(str, filename, start, NULL);
}

PyObject *
Py_CompileStringFlags(const char *str, const char *filename, int start,
		      PyCompilerFlags *flags)
{
	node *n;
	PyCodeObject *co;

	n = PyParser_SimpleParseStringFlagsFilename(str, filename, start,
						    PARSER_FLAGS(flags));
	if (n == NULL)
		return NULL;
	co = PyNode_CompileFlags(n, filename, flags);
	PyNode_Free(n);
	return (PyObject *)co;
}

struct symtable *
Py_SymtableString(const char *str, const char *filename, int start)
{
	node *n;
	struct symtable *st;
	n = PyParser_SimpleParseStringFlagsFilename(str, filename,
						    start, 0);
	if (n == NULL)
		return NULL;
	st = PyNode_CompileSymtable(n, filename);
	PyNode_Free(n);
	return st;
}

/* Simplified interface to parsefile -- return node or set exception */

node *
PyParser_SimpleParseFileFlags(FILE *fp, const char *filename, int start, int flags)
{
	node *n;
	perrdetail err;
	n = PyParser_ParseFileFlags(fp, filename, &_PyParser_Grammar, start,
					(char *)0, (char *)0, &err, flags);
	if (n == NULL)
		err_input(&err);
	return n;
}

node *
PyParser_SimpleParseFile(FILE *fp, const char *filename, int start)
{
	return PyParser_SimpleParseFileFlags(fp, filename, start, 0);
}

/* Simplified interface to parsestring -- return node or set exception */

node *
PyParser_SimpleParseStringFlags(const char *str, int start, int flags)
{
	node *n;
	perrdetail err;
	n = PyParser_ParseStringFlags(str, &_PyParser_Grammar, start, &err,
				      flags);
	if (n == NULL)
		err_input(&err);
	return n;
}

node *
PyParser_SimpleParseString(const char *str, int start)
{
	return PyParser_SimpleParseStringFlags(str, start, 0);
}

node *
PyParser_SimpleParseStringFlagsFilename(const char *str, const char *filename,
					int start, int flags)
{
	node *n;
	perrdetail err;

	n = PyParser_ParseStringFlagsFilename(str, filename,
					      &_PyParser_Grammar,
					      start, &err, flags);
	if (n == NULL)
		err_input(&err);
	return n;
}

node *
PyParser_SimpleParseStringFilename(const char *str, const char *filename, int start)
{
	return PyParser_SimpleParseStringFlagsFilename(str, filename,
						       start, 0);
}

/* May want to move a more generalized form of this to parsetok.c or
   even parser modules. */

void
PyParser_SetError(perrdetail *err)
{
	err_input(err);
}

/* Set the error appropriate to the given input error code (see errcode.h) */

static void
err_input(perrdetail *err)
{
	PyObject *v, *w, *errtype;
	PyObject* u = NULL;
	char *msg = NULL;
	errtype = PyExc_SyntaxError;
	v = Py_BuildValue("(ziiz)", err->filename,
			    err->lineno, err->offset, err->text);
	if (err->text != NULL) {
		PyMem_DEL(err->text);
		err->text = NULL;
	}
	switch (err->error) {
	case E_SYNTAX:
		errtype = PyExc_IndentationError;
		if (err->expected == INDENT)
			msg = "expected an indented block";
		else if (err->token == INDENT)
			msg = "unexpected indent";
		else if (err->token == DEDENT)
			msg = "unexpected unindent";
		else {
			errtype = PyExc_SyntaxError;
			msg = "invalid syntax";
		}
		break;
	case E_TOKEN:
		msg = "invalid token";
		break;
	case E_EOFS:
		msg = "EOF while scanning triple-quoted string";
		break;
	case E_EOLS:
		msg = "EOL while scanning single-quoted string";
		break;
	case E_INTR:
		PyErr_SetNone(PyExc_KeyboardInterrupt);
		Py_XDECREF(v);
		return;
	case E_NOMEM:
		PyErr_NoMemory();
		Py_XDECREF(v);
		return;
	case E_EOF:
		msg = "unexpected EOF while parsing";
		break;
	case E_TABSPACE:
		errtype = PyExc_TabError;
		msg = "inconsistent use of tabs and spaces in indentation";
		break;
	case E_OVERFLOW:
		msg = "expression too long";
		break;
	case E_DEDENT:
		errtype = PyExc_IndentationError;
		msg = "unindent does not match any outer indentation level";
		break;
	case E_TOODEEP:
		errtype = PyExc_IndentationError;
		msg = "too many levels of indentation";
		break;
	case E_DECODE: {	/* XXX */
		PyThreadState* tstate = PyThreadState_Get();
		PyObject* value = tstate->curexc_value;
		if (value != NULL) {
			u = PyObject_Repr(value);
			if (u != NULL) {
				msg = PyString_AsString(u);
				break;
			}
		}
		if (msg == NULL)
			msg = "unknown decode error";
		break;
	}
	default:
		fprintf(stderr, "error=%d\n", err->error);
		msg = "unknown parsing error";
		break;
	}
	w = Py_BuildValue("(sO)", msg, v);
	Py_XDECREF(u);
	Py_XDECREF(v);
	PyErr_SetObject(errtype, w);
	Py_XDECREF(w);
}

/* Print fatal error message and abort */

void
Py_FatalError(const char *msg)
{
	fprintf(stderr, "Fatal Python error: %s\n", msg);
#ifdef MS_WINDOWS
	OutputDebugString("Fatal Python error: ");
	OutputDebugString(msg);
	OutputDebugString("\n");
#ifdef _DEBUG
	DebugBreak();
#endif
#endif /* MS_WINDOWS */
	abort();
}

/* Clean up and exit */

#ifdef WITH_THREAD
#include "pythread.h"
int _PyThread_Started = 0; /* Set by threadmodule.c and maybe others */
#endif

#define NEXITFUNCS 32
static void (*exitfuncs[NEXITFUNCS])(void);
static int nexitfuncs = 0;

int Py_AtExit(void (*func)(void))
{
	if (nexitfuncs >= NEXITFUNCS)
		return -1;
	exitfuncs[nexitfuncs++] = func;
	return 0;
}

static void
call_sys_exitfunc(void)
{
	PyObject *exitfunc = PySys_GetObject("exitfunc");

	if (exitfunc) {
		PyObject *res;
		Py_INCREF(exitfunc);
		PySys_SetObject("exitfunc", (PyObject *)NULL);
		res = PyEval_CallObject(exitfunc, (PyObject *)NULL);
		if (res == NULL) {
			if (!PyErr_ExceptionMatches(PyExc_SystemExit)) {
				PySys_WriteStderr("Error in sys.exitfunc:\n");
			}
			PyErr_Print();
		}
		Py_DECREF(exitfunc);
	}

	if (Py_FlushLine())
		PyErr_Clear();
}

static void
call_ll_exitfuncs(void)
{
	while (nexitfuncs > 0)
		(*exitfuncs[--nexitfuncs])();

	fflush(stdout);
	fflush(stderr);
}

void
Py_Exit(int sts)
{
	Py_Finalize();

#ifdef macintosh
	PyMac_Exit(sts);
#else
	exit(sts);
#endif
}

static void
initsigs(void)
{
#ifdef HAVE_SIGNAL_H
#ifdef SIGPIPE
	signal(SIGPIPE, SIG_IGN);
#endif
#ifdef SIGXFZ
	signal(SIGXFZ, SIG_IGN);
#endif
#ifdef SIGXFSZ
	signal(SIGXFSZ, SIG_IGN);
#endif
#endif /* HAVE_SIGNAL_H */
	PyOS_InitInterrupts(); /* May imply initsignal() */
}

#ifdef MPW

/* Check for file descriptor connected to interactive device.
   Pretend that stdin is always interactive, other files never. */

int
isatty(int fd)
{
	return fd == fileno(stdin);
}

#endif

/*
 * The file descriptor fd is considered ``interactive'' if either
 *   a) isatty(fd) is TRUE, or
 *   b) the -i flag was given, and the filename associated with
 *      the descriptor is NULL or "<stdin>" or "???".
 */
int
Py_FdIsInteractive(FILE *fp, const char *filename)
{
	if (isatty((int)fileno(fp)))
		return 1;
	if (!Py_InteractiveFlag)
		return 0;
	return (filename == NULL) ||
	       (strcmp(filename, "<stdin>") == 0) ||
	       (strcmp(filename, "???") == 0);
}


#if defined(USE_STACKCHECK)
#if defined(WIN32) && defined(_MSC_VER)

/* Stack checking for Microsoft C */

#include <malloc.h>
#include <excpt.h>

/*
 * Return non-zero when we run out of memory on the stack; zero otherwise.
 */
int
PyOS_CheckStack(void)
{
	__try {
		/* alloca throws a stack overflow exception if there's
		   not enough space left on the stack */
		alloca(PYOS_STACK_MARGIN * sizeof(void*));
		return 0;
	} __except (EXCEPTION_EXECUTE_HANDLER) {
		/* just ignore all errors */
	}
	return 1;
}

#endif /* WIN32 && _MSC_VER */

/* Alternate implementations can be added here... */

#endif /* USE_STACKCHECK */


/* Wrappers around sigaction() or signal(). */

PyOS_sighandler_t
PyOS_getsig(int sig)
{
#ifdef HAVE_SIGACTION
	struct sigaction context;
	/* Initialize context.sa_handler to SIG_ERR which makes about as
	 * much sense as anything else.  It should get overwritten if
	 * sigaction actually succeeds and otherwise we avoid an
	 * uninitialized memory read.
	 */
	context.sa_handler = SIG_ERR;
	sigaction(sig, NULL, &context);
	return context.sa_handler;
#else
	PyOS_sighandler_t handler;
	handler = signal(sig, SIG_IGN);
	signal(sig, handler);
	return handler;
#endif
}

PyOS_sighandler_t
PyOS_setsig(int sig, PyOS_sighandler_t handler)
{
#ifdef HAVE_SIGACTION
	struct sigaction context;
	PyOS_sighandler_t oldhandler;
	/* Initialize context.sa_handler to SIG_ERR which makes about as
	 * much sense as anything else.  It should get overwritten if
	 * sigaction actually succeeds and otherwise we avoid an
	 * uninitialized memory read.
	 */
	context.sa_handler = SIG_ERR;
	sigaction(sig, NULL, &context);
	oldhandler = context.sa_handler;
	context.sa_handler = handler;
	sigaction(sig, &context, NULL);
	return oldhandler;
#else
	return signal(sig, handler);
#endif
}
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.