Repository navigation
Expand file tree
/
Copy path_warnings.c
More file actions
1407 lines (1216 loc) · 37.7 KB
/
Copy path_warnings.c
File metadata and controls
1407 lines (1216 loc) · 37.7 KB
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
#include "Python.h"
#include "pycore_initconfig.h"
#include "pycore_interp.h" // PyInterpreterState.warnings
#include "pycore_long.h" // _PyLong_GetZero()
#include "pycore_pyerrors.h"
#include "pycore_pystate.h" // _PyThreadState_GET()
#include "frameobject.h" // PyFrame_GetBack()
#include "clinic/_warnings.c.h"
#define MODULE_NAME "_warnings"
PyDoc_STRVAR(warnings__doc__,
MODULE_NAME " provides basic warning filtering support.\n"
"It is a helper module to speed up interpreter start-up.");
_Py_IDENTIFIER(stderr);
#ifndef Py_DEBUG
_Py_IDENTIFIER(default);
_Py_IDENTIFIER(ignore);
#endif
/*************************************************************************/
typedef struct _warnings_runtime_state WarningsState;
/* Forward declaration of the _warnings module definition. */
static struct PyModuleDef warningsmodule;
_Py_IDENTIFIER(__name__);
/* Given a module object, get its per-module state. */
static WarningsState *
warnings_get_state(void)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
if (interp == NULL) {
PyErr_SetString(PyExc_RuntimeError,
"warnings_get_state: could not identify "
"current interpreter");
return NULL;
}
return &interp->warnings;
}
/* Clear the given warnings module state. */
static void
warnings_clear_state(WarningsState *st)
{
Py_CLEAR(st->filters);
Py_CLEAR(st->once_registry);
Py_CLEAR(st->default_action);
}
#ifndef Py_DEBUG
static PyObject *
create_filter(PyObject *category, _Py_Identifier *id, const char *modname)
{
PyObject *modname_obj = NULL;
PyObject *action_str = _PyUnicode_FromId(id);
if (action_str == NULL) {
return NULL;
}
/* Default to "no module name" for initial filter set */
if (modname != NULL) {
modname_obj = PyUnicode_InternFromString(modname);
if (modname_obj == NULL) {
return NULL;
}
} else {
modname_obj = Py_None;
}
/* This assumes the line number is zero for now. */
return PyTuple_Pack(5, action_str, Py_None,
category, modname_obj, _PyLong_GetZero());
}
#endif
static PyObject *
init_filters(void)
{
#ifdef Py_DEBUG
/* Py_DEBUG builds show all warnings by default */
return PyList_New(0);
#else
/* Other builds ignore a number of warning categories by default */
PyObject *filters = PyList_New(5);
if (filters == NULL) {
return NULL;
}
size_t pos = 0; /* Post-incremented in each use. */
PyList_SET_ITEM(filters, pos++,
create_filter(PyExc_DeprecationWarning, &PyId_default, "__main__"));
PyList_SET_ITEM(filters, pos++,
create_filter(PyExc_DeprecationWarning, &PyId_ignore, NULL));
PyList_SET_ITEM(filters, pos++,
create_filter(PyExc_PendingDeprecationWarning, &PyId_ignore, NULL));
PyList_SET_ITEM(filters, pos++,
create_filter(PyExc_ImportWarning, &PyId_ignore, NULL));
PyList_SET_ITEM(filters, pos++,
create_filter(PyExc_ResourceWarning, &PyId_ignore, NULL));
for (size_t x = 0; x < pos; x++) {
if (PyList_GET_ITEM(filters, x) == NULL) {
Py_DECREF(filters);
return NULL;
}
}
return filters;
#endif
}
/* Initialize the given warnings module state. */
int
_PyWarnings_InitState(PyThreadState *tstate)
{
WarningsState *st = &tstate->interp->warnings;
if (st->filters == NULL) {
st->filters = init_filters();
if (st->filters == NULL) {
return -1;
}
}
if (st->once_registry == NULL) {
st->once_registry = PyDict_New();
if (st->once_registry == NULL) {
return -1;
}
}
if (st->default_action == NULL) {
st->default_action = PyUnicode_FromString("default");
if (st->default_action == NULL) {
return -1;
}
}
st->filters_version = 0;
return 0;
}
/*************************************************************************/
static int
check_matched(PyObject *obj, PyObject *arg)
{
PyObject *result;
_Py_IDENTIFIER(match);
int rc;
/* A 'None' filter always matches */
if (obj == Py_None)
return 1;
/* An internal plain text default filter must match exactly */
if (PyUnicode_CheckExact(obj)) {
int cmp_result = PyUnicode_Compare(obj, arg);
if (cmp_result == -1 && PyErr_Occurred()) {
return -1;
}
return !cmp_result;
}
/* Otherwise assume a regex filter and call its match() method */
result = _PyObject_CallMethodIdOneArg(obj, &PyId_match, arg);
if (result == NULL)
return -1;
rc = PyObject_IsTrue(result);
Py_DECREF(result);
return rc;
}
/*
Returns a new reference.
A NULL return value can mean false or an error.
*/
static PyObject *
get_warnings_attr(_Py_Identifier *attr_id, int try_import)
{
PyObject *warnings_str;
PyObject *warnings_module, *obj;
_Py_IDENTIFIER(warnings);
warnings_str = _PyUnicode_FromId(&PyId_warnings);
if (warnings_str == NULL) {
return NULL;
}
/* don't try to import after the start of the Python finallization */
if (try_import && !_Py_IsFinalizing()) {
warnings_module = PyImport_Import(warnings_str);
if (warnings_module == NULL) {
/* Fallback to the C implementation if we cannot get
the Python implementation */
if (PyErr_ExceptionMatches(PyExc_ImportError)) {
PyErr_Clear();
}
return NULL;
}
}
else {
/* if we're so late into Python finalization that the module dict is
gone, then we can't even use PyImport_GetModule without triggering
an interpreter abort.
*/
if (!_PyInterpreterState_GET()->modules) {
return NULL;
}
warnings_module = PyImport_GetModule(warnings_str);
if (warnings_module == NULL)
return NULL;
}
(void)_PyObject_LookupAttrId(warnings_module, attr_id, &obj);
Py_DECREF(warnings_module);
return obj;
}
static PyObject *
get_once_registry(WarningsState *st)
{
PyObject *registry;
_Py_IDENTIFIER(onceregistry);
registry = get_warnings_attr(&PyId_onceregistry, 0);
if (registry == NULL) {
if (PyErr_Occurred())
return NULL;
assert(st->once_registry);
return st->once_registry;
}
if (!PyDict_Check(registry)) {
PyErr_Format(PyExc_TypeError,
MODULE_NAME ".onceregistry must be a dict, "
"not '%.200s'",
Py_TYPE(registry)->tp_name);
Py_DECREF(registry);
return NULL;
}
Py_SETREF(st->once_registry, registry);
return registry;
}
static PyObject *
get_default_action(WarningsState *st)
{
PyObject *default_action;
_Py_IDENTIFIER(defaultaction);
default_action = get_warnings_attr(&PyId_defaultaction, 0);
if (default_action == NULL) {
if (PyErr_Occurred()) {
return NULL;
}
assert(st->default_action);
return st->default_action;
}
if (!PyUnicode_Check(default_action)) {
PyErr_Format(PyExc_TypeError,
MODULE_NAME ".defaultaction must be a string, "
"not '%.200s'",
Py_TYPE(default_action)->tp_name);
Py_DECREF(default_action);
return NULL;
}
Py_SETREF(st->default_action, default_action);
return default_action;
}
/* The item is a new reference. */
static PyObject*
get_filter(PyObject *category, PyObject *text, Py_ssize_t lineno,
PyObject *module, PyObject **item)
{
PyObject *action;
Py_ssize_t i;
PyObject *warnings_filters;
_Py_IDENTIFIER(filters);
WarningsState *st = warnings_get_state();
if (st == NULL) {
return NULL;
}
warnings_filters = get_warnings_attr(&PyId_filters, 0);
if (warnings_filters == NULL) {
if (PyErr_Occurred())
return NULL;
}
else {
Py_SETREF(st->filters, warnings_filters);
}
PyObject *filters = st->filters;
if (filters == NULL || !PyList_Check(filters)) {
PyErr_SetString(PyExc_ValueError,
MODULE_NAME ".filters must be a list");
return NULL;
}
/* WarningsState.filters could change while we are iterating over it. */
for (i = 0; i < PyList_GET_SIZE(filters); i++) {
PyObject *tmp_item, *action, *msg, *cat, *mod, *ln_obj;
Py_ssize_t ln;
int is_subclass, good_msg, good_mod;
tmp_item = PyList_GET_ITEM(filters, i);
if (!PyTuple_Check(tmp_item) || PyTuple_GET_SIZE(tmp_item) != 5) {
PyErr_Format(PyExc_ValueError,
MODULE_NAME ".filters item %zd isn't a 5-tuple", i);
return NULL;
}
/* Python code: action, msg, cat, mod, ln = item */
Py_INCREF(tmp_item);
action = PyTuple_GET_ITEM(tmp_item, 0);
msg = PyTuple_GET_ITEM(tmp_item, 1);
cat = PyTuple_GET_ITEM(tmp_item, 2);
mod = PyTuple_GET_ITEM(tmp_item, 3);
ln_obj = PyTuple_GET_ITEM(tmp_item, 4);
if (!PyUnicode_Check(action)) {
PyErr_Format(PyExc_TypeError,
"action must be a string, not '%.200s'",
Py_TYPE(action)->tp_name);
Py_DECREF(tmp_item);
return NULL;
}
good_msg = check_matched(msg, text);
if (good_msg == -1) {
Py_DECREF(tmp_item);
return NULL;
}
good_mod = check_matched(mod, module);
if (good_mod == -1) {
Py_DECREF(tmp_item);
return NULL;
}
is_subclass = PyObject_IsSubclass(category, cat);
if (is_subclass == -1) {
Py_DECREF(tmp_item);
return NULL;
}
ln = PyLong_AsSsize_t(ln_obj);
if (ln == -1 && PyErr_Occurred()) {
Py_DECREF(tmp_item);
return NULL;
}
if (good_msg && is_subclass && good_mod && (ln == 0 || lineno == ln)) {
*item = tmp_item;
return action;
}
Py_DECREF(tmp_item);
}
action = get_default_action(st);
if (action != NULL) {
Py_INCREF(Py_None);
*item = Py_None;
return action;
}
return NULL;
}
static int
already_warned(PyObject *registry, PyObject *key, int should_set)
{
PyObject *version_obj, *already_warned;
_Py_IDENTIFIER(version);
if (key == NULL)
return -1;
WarningsState *st = warnings_get_state();
if (st == NULL) {
return -1;
}
version_obj = _PyDict_GetItemIdWithError(registry, &PyId_version);
if (version_obj == NULL
|| !PyLong_CheckExact(version_obj)
|| PyLong_AsLong(version_obj) != st->filters_version)
{
if (PyErr_Occurred()) {
return -1;
}
PyDict_Clear(registry);
version_obj = PyLong_FromLong(st->filters_version);
if (version_obj == NULL)
return -1;
if (_PyDict_SetItemId(registry, &PyId_version, version_obj) < 0) {
Py_DECREF(version_obj);
return -1;
}
Py_DECREF(version_obj);
}
else {
already_warned = PyDict_GetItemWithError(registry, key);
if (already_warned != NULL) {
int rc = PyObject_IsTrue(already_warned);
if (rc != 0)
return rc;
}
else if (PyErr_Occurred()) {
return -1;
}
}
/* This warning wasn't found in the registry, set it. */
if (should_set)
return PyDict_SetItem(registry, key, Py_True);
return 0;
}
/* New reference. */
static PyObject *
normalize_module(PyObject *filename)
{
PyObject *module;
int kind;
const void *data;
Py_ssize_t len;
len = PyUnicode_GetLength(filename);
if (len < 0)
return NULL;
if (len == 0)
return PyUnicode_FromString("<unknown>");
kind = PyUnicode_KIND(filename);
data = PyUnicode_DATA(filename);
/* if filename.endswith(".py"): */
if (len >= 3 &&
PyUnicode_READ(kind, data, len-3) == '.' &&
PyUnicode_READ(kind, data, len-2) == 'p' &&
PyUnicode_READ(kind, data, len-1) == 'y')
{
module = PyUnicode_Substring(filename, 0, len-3);
}
else {
module = filename;
Py_INCREF(module);
}
return module;
}
static int
update_registry(PyObject *registry, PyObject *text, PyObject *category,
int add_zero)
{
PyObject *altkey;
int rc;
if (add_zero)
altkey = PyTuple_Pack(3, text, category, _PyLong_GetZero());
else
altkey = PyTuple_Pack(2, text, category);
rc = already_warned(registry, altkey, 1);
Py_XDECREF(altkey);
return rc;
}
static void
show_warning(PyObject *filename, int lineno, PyObject *text,
PyObject *category, PyObject *sourceline)
{
PyObject *f_stderr;
PyObject *name;
char lineno_str[128];
PyOS_snprintf(lineno_str, sizeof(lineno_str), ":%d: ", lineno);
name = _PyObject_GetAttrId(category, &PyId___name__);
if (name == NULL) {
goto error;
}
f_stderr = _PySys_GetObjectId(&PyId_stderr);
if (f_stderr == NULL) {
fprintf(stderr, "lost sys.stderr\n");
goto error;
}
/* Print "filename:lineno: category: text\n" */
if (PyFile_WriteObject(filename, f_stderr, Py_PRINT_RAW) < 0)
goto error;
if (PyFile_WriteString(lineno_str, f_stderr) < 0)
goto error;
if (PyFile_WriteObject(name, f_stderr, Py_PRINT_RAW) < 0)
goto error;
if (PyFile_WriteString(": ", f_stderr) < 0)
goto error;
if (PyFile_WriteObject(text, f_stderr, Py_PRINT_RAW) < 0)
goto error;
if (PyFile_WriteString("\n", f_stderr) < 0)
goto error;
Py_CLEAR(name);
/* Print " source_line\n" */
if (sourceline) {
int kind;
const void *data;
Py_ssize_t i, len;
Py_UCS4 ch;
PyObject *truncated;
if (PyUnicode_READY(sourceline) < 1)
goto error;
kind = PyUnicode_KIND(sourceline);
data = PyUnicode_DATA(sourceline);
len = PyUnicode_GET_LENGTH(sourceline);
for (i=0; i<len; i++) {
ch = PyUnicode_READ(kind, data, i);
if (ch != ' ' && ch != '\t' && ch != '\014')
break;
}
truncated = PyUnicode_Substring(sourceline, i, len);
if (truncated == NULL)
goto error;
PyFile_WriteObject(sourceline, f_stderr, Py_PRINT_RAW);
Py_DECREF(truncated);
PyFile_WriteString("\n", f_stderr);
}
else {
_Py_DisplaySourceLine(f_stderr, filename, lineno, 2);
}
error:
Py_XDECREF(name);
PyErr_Clear();
}
static int
call_show_warning(PyObject *category, PyObject *text, PyObject *message,
PyObject *filename, int lineno, PyObject *lineno_obj,
PyObject *sourceline, PyObject *source)
{
PyObject *show_fn, *msg, *res, *warnmsg_cls = NULL;
_Py_IDENTIFIER(_showwarnmsg);
_Py_IDENTIFIER(WarningMessage);
/* If the source parameter is set, try to get the Python implementation.
The Python implementation is able to log the traceback where the source
was allocated, whereas the C implementation doesn't. */
show_fn = get_warnings_attr(&PyId__showwarnmsg, source != NULL);
if (show_fn == NULL) {
if (PyErr_Occurred())
return -1;
show_warning(filename, lineno, text, category, sourceline);
return 0;
}
if (!PyCallable_Check(show_fn)) {
PyErr_SetString(PyExc_TypeError,
"warnings._showwarnmsg() must be set to a callable");
goto error;
}
warnmsg_cls = get_warnings_attr(&PyId_WarningMessage, 0);
if (warnmsg_cls == NULL) {
if (!PyErr_Occurred()) {
PyErr_SetString(PyExc_RuntimeError,
"unable to get warnings.WarningMessage");
}
goto error;
}
msg = PyObject_CallFunctionObjArgs(warnmsg_cls, message, category,
filename, lineno_obj, Py_None, Py_None, source,
NULL);
Py_DECREF(warnmsg_cls);
if (msg == NULL)
goto error;
res = PyObject_CallOneArg(show_fn, msg);
Py_DECREF(show_fn);
Py_DECREF(msg);
if (res == NULL)
return -1;
Py_DECREF(res);
return 0;
error:
Py_XDECREF(show_fn);
return -1;
}
static PyObject *
warn_explicit(PyObject *category, PyObject *message,
PyObject *filename, int lineno,
PyObject *module, PyObject *registry, PyObject *sourceline,
PyObject *source)
{
PyObject *key = NULL, *text = NULL, *result = NULL, *lineno_obj = NULL;
PyObject *item = NULL;
PyObject *action;
int rc;
/* module can be None if a warning is emitted late during Python shutdown.
In this case, the Python warnings module was probably unloaded, filters
are no more available to choose as action. It is safer to ignore the
warning and do nothing. */
if (module == Py_None)
Py_RETURN_NONE;
if (registry && !PyDict_Check(registry) && (registry != Py_None)) {
PyErr_SetString(PyExc_TypeError, "'registry' must be a dict or None");
return NULL;
}
/* Normalize module. */
if (module == NULL) {
module = normalize_module(filename);
if (module == NULL)
return NULL;
}
else
Py_INCREF(module);
/* Normalize message. */
Py_INCREF(message); /* DECREF'ed in cleanup. */
rc = PyObject_IsInstance(message, PyExc_Warning);
if (rc == -1) {
goto cleanup;
}
if (rc == 1) {
text = PyObject_Str(message);
if (text == NULL)
goto cleanup;
category = (PyObject*)Py_TYPE(message);
}
else {
text = message;
message = PyObject_CallOneArg(category, message);
if (message == NULL)
goto cleanup;
}
lineno_obj = PyLong_FromLong(lineno);
if (lineno_obj == NULL)
goto cleanup;
if (source == Py_None) {
source = NULL;
}
/* Create key. */
key = PyTuple_Pack(3, text, category, lineno_obj);
if (key == NULL)
goto cleanup;
if ((registry != NULL) && (registry != Py_None)) {
rc = already_warned(registry, key, 0);
if (rc == -1)
goto cleanup;
else if (rc == 1)
goto return_none;
/* Else this warning hasn't been generated before. */
}
action = get_filter(category, text, lineno, module, &item);
if (action == NULL)
goto cleanup;
if (_PyUnicode_EqualToASCIIString(action, "error")) {
PyErr_SetObject(category, message);
goto cleanup;
}
if (_PyUnicode_EqualToASCIIString(action, "ignore")) {
goto return_none;
}
/* Store in the registry that we've been here, *except* when the action
is "always". */
rc = 0;
if (!_PyUnicode_EqualToASCIIString(action, "always")) {
if (registry != NULL && registry != Py_None &&
PyDict_SetItem(registry, key, Py_True) < 0)
{
goto cleanup;
}
if (_PyUnicode_EqualToASCIIString(action, "once")) {
if (registry == NULL || registry == Py_None) {
WarningsState *st = warnings_get_state();
if (st == NULL) {
goto cleanup;
}
registry = get_once_registry(st);
if (registry == NULL)
goto cleanup;
}
/* WarningsState.once_registry[(text, category)] = 1 */
rc = update_registry(registry, text, category, 0);
}
else if (_PyUnicode_EqualToASCIIString(action, "module")) {
/* registry[(text, category, 0)] = 1 */
if (registry != NULL && registry != Py_None)
rc = update_registry(registry, text, category, 0);
}
else if (!_PyUnicode_EqualToASCIIString(action, "default")) {
PyErr_Format(PyExc_RuntimeError,
"Unrecognized action (%R) in warnings.filters:\n %R",
action, item);
goto cleanup;
}
}
if (rc == 1) /* Already warned for this module. */
goto return_none;
if (rc == 0) {
if (call_show_warning(category, text, message, filename, lineno,
lineno_obj, sourceline, source) < 0)
goto cleanup;
}
else /* if (rc == -1) */
goto cleanup;
return_none:
result = Py_None;
Py_INCREF(result);
cleanup:
Py_XDECREF(item);
Py_XDECREF(key);
Py_XDECREF(text);
Py_XDECREF(lineno_obj);
Py_DECREF(module);
Py_XDECREF(message);
return result; /* Py_None or NULL. */
}
static int
is_internal_frame(PyFrameObject *frame)
{
static PyObject *importlib_string = NULL;
static PyObject *bootstrap_string = NULL;
int contains;
if (importlib_string == NULL) {
importlib_string = PyUnicode_FromString("importlib");
if (importlib_string == NULL) {
return 0;
}
bootstrap_string = PyUnicode_FromString("_bootstrap");
if (bootstrap_string == NULL) {
Py_DECREF(importlib_string);
return 0;
}
Py_INCREF(importlib_string);
Py_INCREF(bootstrap_string);
}
if (frame == NULL) {
return 0;
}
PyCodeObject *code = PyFrame_GetCode(frame);
PyObject *filename = code->co_filename;
Py_DECREF(code);
if (filename == NULL) {
return 0;
}
if (!PyUnicode_Check(filename)) {
return 0;
}
contains = PyUnicode_Contains(filename, importlib_string);
if (contains < 0) {
return 0;
}
else if (contains > 0) {
contains = PyUnicode_Contains(filename, bootstrap_string);
if (contains < 0) {
return 0;
}
else if (contains > 0) {
return 1;
}
}
return 0;
}
static PyFrameObject *
next_external_frame(PyFrameObject *frame)
{
do {
PyFrameObject *back = PyFrame_GetBack(frame);
Py_DECREF(frame);
frame = back;
} while (frame != NULL && is_internal_frame(frame));
return frame;
}
/* filename, module, and registry are new refs, globals is borrowed */
/* Returns 0 on error (no new refs), 1 on success */
static int
setup_context(Py_ssize_t stack_level, PyObject **filename, int *lineno,
PyObject **module, PyObject **registry)
{
_Py_IDENTIFIER(__warningregistry__);
PyObject *globals;
/* Setup globals, filename and lineno. */
PyThreadState *tstate = _PyThreadState_GET();
PyFrameObject *f = PyThreadState_GetFrame(tstate);
// Stack level comparisons to Python code is off by one as there is no
// warnings-related stack level to avoid.
if (stack_level <= 0 || is_internal_frame(f)) {
while (--stack_level > 0 && f != NULL) {
PyFrameObject *back = PyFrame_GetBack(f);
Py_DECREF(f);
f = back;
}
}
else {
while (--stack_level > 0 && f != NULL) {
f = next_external_frame(f);
}
}
if (f == NULL) {
globals = tstate->interp->sysdict;
*filename = PyUnicode_FromString("sys");
*lineno = 1;
}
else {
globals = f->f_globals;
PyCodeObject *code = PyFrame_GetCode(f);
*filename = code->co_filename;
Py_DECREF(code);
Py_INCREF(*filename);
*lineno = PyFrame_GetLineNumber(f);
Py_DECREF(f);
}
*module = NULL;
/* Setup registry. */
assert(globals != NULL);
assert(PyDict_Check(globals));
*registry = _PyDict_GetItemIdWithError(globals, &PyId___warningregistry__);
if (*registry == NULL) {
int rc;
if (_PyErr_Occurred(tstate)) {
goto handle_error;
}
*registry = PyDict_New();
if (*registry == NULL)
goto handle_error;
rc = _PyDict_SetItemId(globals, &PyId___warningregistry__, *registry);
if (rc < 0)
goto handle_error;
}
else
Py_INCREF(*registry);
/* Setup module. */
*module = _PyDict_GetItemIdWithError(globals, &PyId___name__);
if (*module == Py_None || (*module != NULL && PyUnicode_Check(*module))) {
Py_INCREF(*module);
}
else if (_PyErr_Occurred(tstate)) {
goto handle_error;
}
else {
*module = PyUnicode_FromString("<string>");
if (*module == NULL)
goto handle_error;
}
return 1;
handle_error:
Py_XDECREF(*registry);
Py_XDECREF(*module);
Py_DECREF(*filename);
return 0;
}
static PyObject *
get_category(PyObject *message, PyObject *category)
{
int rc;
/* Get category. */
rc = PyObject_IsInstance(message, PyExc_Warning);
if (rc == -1)
return NULL;
if (rc == 1)
category = (PyObject*)Py_TYPE(message);
else if (category == NULL || category == Py_None)
category = PyExc_UserWarning;
/* Validate category. */
rc = PyObject_IsSubclass(category, PyExc_Warning);
/* category is not a subclass of PyExc_Warning or
PyObject_IsSubclass raised an error */
if (rc == -1 || rc == 0) {
PyErr_Format(PyExc_TypeError,
"category must be a Warning subclass, not '%s'",
Py_TYPE(category)->tp_name);
return NULL;
}
return category;
}
static PyObject *
do_warn(PyObject *message, PyObject *category, Py_ssize_t stack_level,
PyObject *source)
{
PyObject *filename, *module, *registry, *res;
int lineno;
if (!setup_context(stack_level, &filename, &lineno, &module, ®istry))
return NULL;
res = warn_explicit(category, message, filename, lineno, module, registry,
NULL, source);
Py_DECREF(filename);
Py_DECREF(registry);
Py_DECREF(module);
return res;
}
/*[clinic input]
warn as warnings_warn
message: object
category: object = None
stacklevel: Py_ssize_t = 1
source: object = None
Issue a warning, or maybe ignore it or raise an exception.
[clinic start generated code]*/
static PyObject *
warnings_warn_impl(PyObject *module, PyObject *message, PyObject *category,
Py_ssize_t stacklevel, PyObject *source)
/*[clinic end generated code: output=31ed5ab7d8d760b2 input=bfdf5cf99f6c4edd]*/
{
category = get_category(message, category);
if (category == NULL)
return NULL;
return do_warn(message, category, stacklevel, source);
}
static PyObject *
get_source_line(PyObject *module_globals, int lineno)
{
_Py_IDENTIFIER(get_source);
_Py_IDENTIFIER(__loader__);
PyObject *loader;
PyObject *module_name;
PyObject *get_source;
PyObject *source;
PyObject *source_list;
PyObject *source_line;
/* Check/get the requisite pieces needed for the loader. */
loader = _PyDict_GetItemIdWithError(module_globals, &PyId___loader__);
if (loader == NULL) {
return NULL;
}
Py_INCREF(loader);
module_name = _PyDict_GetItemIdWithError(module_globals, &PyId___name__);
if (!module_name) {