-
Notifications
You must be signed in to change notification settings - Fork 75
/
vm.c
1559 lines (1420 loc) · 65.6 KB
/
vm.c
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
/*
* This file is part of the Pycopy project, https://github.com/pfalcon/pycopy
* This file was part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013-2019 Damien P. George
* Copyright (c) 2014-2018 Paul Sokolovsky
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "py/emitglue.h"
#include "py/objtype.h"
#include "py/runtime.h"
#include "py/bc0.h"
#include "py/bc.h"
#include "py/profile.h"
// *FORMAT-OFF*
#if 0
#if MICROPY_PY_THREAD
#define TRACE_PREFIX mp_printf(&mp_plat_print, "ts=%p sp=%d ", mp_thread_get_state(), (int)(sp - &code_state->state[0] + 1))
#else
#define TRACE_PREFIX mp_printf(&mp_plat_print, "sp=%d ", (int)(sp - &code_state->state[0] + 1))
#endif
#define TRACE(ip) TRACE_PREFIX; mp_bytecode_print2(&mp_plat_print, ip, 1, code_state->fun_bc->const_table);
#else
#define TRACE(ip)
#endif
// Value stack grows up (this makes it incompatible with native C stack, but
// makes sure that arguments to functions are in natural order arg1..argN
// (Python semantics mandates left-to-right evaluation order, including for
// function arguments). Stack pointer is pre-incremented and points at the
// top element.
// Exception stack also grows up, top element is also pointed at.
#define DECODE_UINT \
mp_uint_t unum = 0; \
do { \
unum = (unum << 7) + (*ip & 0x7f); \
} while ((*ip++ & 0x80) != 0)
#define DECODE_ULABEL size_t ulab = (ip[0] | (ip[1] << 8)); ip += 2
#define DECODE_SLABEL size_t slab = (ip[0] | (ip[1] << 8)) - 0x8000; ip += 2
#if MICROPY_PERSISTENT_CODE
#define DECODE_QSTR \
qstr qst = ip[0] | ip[1] << 8; \
ip += 2;
#define DECODE_PTR \
DECODE_UINT; \
void *ptr = (void*)(uintptr_t)code_state->fun_bc->const_table[unum]
#define DECODE_OBJ \
DECODE_UINT; \
mp_obj_t obj = (mp_obj_t)code_state->fun_bc->const_table[unum]
#else
#define DECODE_QSTR qstr qst = 0; \
do { \
qst = (qst << 7) + (*ip & 0x7f); \
} while ((*ip++ & 0x80) != 0)
#define DECODE_PTR \
ip = (byte*)MP_ALIGN(ip, sizeof(void*)); \
void *ptr = *(void**)ip; \
ip += sizeof(void*)
#define DECODE_OBJ \
ip = (byte*)MP_ALIGN(ip, sizeof(mp_obj_t)); \
mp_obj_t obj = *(mp_obj_t*)ip; \
ip += sizeof(mp_obj_t)
#endif
#define PUSH(val) *++sp = (val)
#define POP() (*sp--)
#define TOP() (*sp)
#define SET_TOP(val) *sp = (val)
#if MICROPY_PY_SYS_EXC_INFO
#define CLEAR_SYS_EXC_INFO() MP_STATE_VM(cur_exception) = NULL;
#else
#define CLEAR_SYS_EXC_INFO()
#endif
#define PUSH_EXC_BLOCK(with_or_finally) do { \
DECODE_ULABEL; /* except labels are always forward */ \
++exc_sp; \
exc_sp->handler = ip + ulab; \
exc_sp->val_sp = MP_TAGPTR_MAKE(sp, ((with_or_finally) << 1)); \
exc_sp->prev_exc = NULL; \
} while (0)
#define POP_EXC_BLOCK() \
exc_sp--; /* pop back to previous exception handler */ \
CLEAR_SYS_EXC_INFO() /* just clear sys.exc_info(), not compliant, but it shouldn't be used in 1st place */
#define CANCEL_ACTIVE_FINALLY(sp) do { \
if (mp_obj_is_small_int(sp[-1])) { \
/* Stack: (..., prev_dest_ip, prev_cause, dest_ip) */ \
/* Cancel the unwind through the previous finally, replace with current one */ \
sp[-2] = sp[0]; \
sp -= 2; \
} else { \
assert(sp[-1] == mp_const_none || mp_obj_is_exception_instance(sp[-1])); \
/* Stack: (..., None/exception, dest_ip) */ \
/* Silence the finally's exception value (may be None or an exception) */ \
sp[-1] = sp[0]; \
--sp; \
} \
} while (0)
#if MICROPY_PY_SYS_SETTRACE
#define FRAME_SETUP() do { \
assert(code_state != code_state->prev_state); \
MP_STATE_THREAD(current_code_state) = code_state; \
assert(code_state != code_state->prev_state); \
} while(0)
#define FRAME_ENTER() do { \
assert(code_state != code_state->prev_state); \
code_state->prev_state = MP_STATE_THREAD(current_code_state); \
assert(code_state != code_state->prev_state); \
if (!mp_prof_is_executing) { \
mp_prof_frame_enter(code_state); \
} \
} while(0)
#define FRAME_LEAVE() do { \
assert(code_state != code_state->prev_state); \
MP_STATE_THREAD(current_code_state) = code_state->prev_state; \
assert(code_state != code_state->prev_state); \
} while(0)
#define FRAME_UPDATE() do { \
assert(MP_STATE_THREAD(current_code_state) == code_state); \
if (!mp_prof_is_executing) { \
code_state->frame = MP_OBJ_TO_PTR(mp_prof_frame_update(code_state)); \
} \
} while(0)
#define TRACE_TICK(current_ip, current_sp, is_exception) do { \
assert(code_state != code_state->prev_state); \
assert(MP_STATE_THREAD(current_code_state) == code_state); \
if (!mp_prof_is_executing && code_state->frame && MP_STATE_THREAD(prof_trace_callback)) { \
MP_PROF_INSTR_DEBUG_PRINT(code_state->ip); \
} \
if (!mp_prof_is_executing && code_state->frame && code_state->frame->callback) { \
mp_prof_instr_tick(code_state, is_exception); \
} \
} while(0)
#else // MICROPY_PY_SYS_SETTRACE
#define FRAME_SETUP()
#define FRAME_ENTER()
#define FRAME_LEAVE()
#define FRAME_UPDATE()
#define TRACE_TICK(current_ip, current_sp, is_exception)
#endif // MICROPY_PY_SYS_SETTRACE
#if MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
static inline mp_map_elem_t *mp_map_cached_lookup(mp_map_t *map, qstr qst, uint8_t *idx_cache) {
size_t idx = *idx_cache;
mp_obj_t key = MP_OBJ_NEW_QSTR(qst);
mp_map_elem_t *elem = NULL;
if (idx < map->alloc && map->table[idx].key == key) {
elem = &map->table[idx];
} else {
elem = mp_map_lookup(map, key, MP_MAP_LOOKUP);
if (elem != NULL) {
*idx_cache = (elem - &map->table[0]) & 0xff;
}
}
return elem;
}
#endif
// fastn has items in reverse order (fastn[0] is local[0], fastn[-1] is local[1], etc)
// sp points to bottom of stack which grows up
// returns:
// MP_VM_RETURN_NORMAL, sp valid, return value in *sp
// MP_VM_RETURN_YIELD, ip, sp valid, yielded value in *sp
// MP_VM_RETURN_EXCEPTION, exception in state[0]
mp_vm_return_kind_t mp_execute_bytecode(mp_code_state_t *code_state, volatile mp_obj_t inject_exc) {
#define SELECTIVE_EXC_IP (0)
#if SELECTIVE_EXC_IP
#define MARK_EXC_IP_SELECTIVE() { code_state->ip = ip; } /* stores ip 1 byte past last opcode */
#define MARK_EXC_IP_GLOBAL()
#else
#define MARK_EXC_IP_SELECTIVE()
#define MARK_EXC_IP_GLOBAL() { code_state->ip = ip; } /* stores ip pointing to last opcode */
#endif
#if MICROPY_OPT_COMPUTED_GOTO
#include "py/vmentrytable.h"
#define DISPATCH() do { \
TRACE(ip); \
MARK_EXC_IP_GLOBAL(); \
TRACE_TICK(ip, sp, false); \
goto *entry_table[*ip++]; \
} while (0)
#define DISPATCH_WITH_PEND_EXC_CHECK() goto pending_exception_check
#define ENTRY(op) entry_##op
#define ENTRY_DEFAULT entry_default
#else
#define DISPATCH() goto dispatch_loop
#define DISPATCH_WITH_PEND_EXC_CHECK() goto pending_exception_check
#define ENTRY(op) case op
#define ENTRY_DEFAULT default
#endif
// nlr_raise needs to be implemented as a goto, so that the C compiler's flow analyser
// sees that it's possible for us to jump from the dispatch loop to the exception
// handler. Without this, the code may have a different stack layout in the dispatch
// loop and the exception handler, leading to very obscure bugs.
#define RAISE(o) do { nlr_pop(); nlr.ret_val = MP_OBJ_TO_PTR(o); goto exception_handler; } while (0)
#if MICROPY_STACKLESS
run_code_state: ;
#endif
FRAME_ENTER();
#if MICROPY_STACKLESS
run_code_state_from_return: ;
#endif
FRAME_SETUP();
// Pointers which are constant for particular invocation of mp_execute_bytecode()
mp_obj_t * /*const*/ fastn;
mp_exc_stack_t * /*const*/ exc_stack;
{
size_t n_state = code_state->n_state;
fastn = &code_state->state[n_state - 1];
exc_stack = (mp_exc_stack_t*)(code_state->state + n_state);
}
// variables that are visible to the exception handler (declared volatile)
mp_exc_stack_t *volatile exc_sp = MP_CODE_STATE_EXC_SP_IDX_TO_PTR(exc_stack, code_state->exc_sp_idx); // stack grows up, exc_sp points to top of stack
#if MICROPY_PY_THREAD_GIL && MICROPY_PY_THREAD_GIL_VM_DIVISOR
// This needs to be volatile and outside the VM loop so it persists across handling
// of any exceptions. Otherwise it's possible that the VM never gives up the GIL.
volatile int gil_divisor = MICROPY_PY_THREAD_GIL_VM_DIVISOR;
#endif
// outer exception handling loop
for (;;) {
nlr_buf_t nlr;
outer_dispatch_loop:
if (nlr_push(&nlr) == 0) {
// local variables that are not visible to the exception handler
const byte *ip = code_state->ip;
mp_obj_t *sp = code_state->sp;
mp_obj_t obj_shared;
MICROPY_VM_HOOK_INIT
// If we have exception to inject, now that we finish setting up
// execution context, raise it. This works as if RAISE_VARARGS
// bytecode was executed.
// Injecting exc into yield from generator is a special case,
// handled by MP_BC_YIELD_FROM itself
if (inject_exc != MP_OBJ_NULL && *ip != MP_BC_YIELD_FROM) {
mp_obj_t exc = inject_exc;
inject_exc = MP_OBJ_NULL;
exc = mp_make_raise_obj(exc);
RAISE(exc);
}
// loop to execute byte code
for (;;) {
dispatch_loop:
#if MICROPY_OPT_COMPUTED_GOTO
DISPATCH();
#else
TRACE(ip);
MARK_EXC_IP_GLOBAL();
TRACE_TICK(ip, sp, false);
switch (*ip++) {
#endif
ENTRY(MP_BC_LOAD_CONST_FALSE):
PUSH(mp_const_false);
DISPATCH();
ENTRY(MP_BC_LOAD_CONST_NONE):
PUSH(mp_const_none);
DISPATCH();
ENTRY(MP_BC_LOAD_CONST_TRUE):
PUSH(mp_const_true);
DISPATCH();
ENTRY(MP_BC_LOAD_CONST_SMALL_INT): {
mp_int_t num = 0;
if ((ip[0] & 0x40) != 0) {
// Number is negative
num--;
}
do {
num = (num << 7) | (*ip & 0x7f);
} while ((*ip++ & 0x80) != 0);
PUSH(MP_OBJ_NEW_SMALL_INT(num));
DISPATCH();
}
ENTRY(MP_BC_LOAD_CONST_STRING): {
DECODE_QSTR;
PUSH(MP_OBJ_NEW_QSTR(qst));
DISPATCH();
}
ENTRY(MP_BC_LOAD_CONST_OBJ): {
DECODE_OBJ;
PUSH(obj);
DISPATCH();
}
ENTRY(MP_BC_LOAD_NULL):
PUSH(MP_OBJ_NULL);
DISPATCH();
ENTRY(MP_BC_LOAD_FAST_N): {
DECODE_UINT;
obj_shared = fastn[-unum];
load_check:
if (obj_shared == MP_OBJ_NULL) {
local_name_error: {
MARK_EXC_IP_SELECTIVE();
mp_obj_t obj = mp_obj_new_exception_msg(&mp_type_NameError, MP_ERROR_TEXT("local variable referenced before assignment"));
RAISE(obj);
}
}
PUSH(obj_shared);
DISPATCH();
}
ENTRY(MP_BC_LOAD_DEREF): {
DECODE_UINT;
obj_shared = mp_obj_cell_get(fastn[-unum]);
goto load_check;
}
#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
ENTRY(MP_BC_LOAD_NAME): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
PUSH(mp_load_name(qst));
DISPATCH();
}
#else
ENTRY(MP_BC_LOAD_NAME): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_map_elem_t *elem = mp_map_cached_lookup(&mp_locals_get()->map, qst, (uint8_t*)ip);
mp_obj_t obj;
if (elem != NULL) {
obj = elem->value;
} else {
obj = mp_load_name(qst);
}
PUSH(obj);
ip++;
DISPATCH();
}
#endif
#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
ENTRY(MP_BC_LOAD_GLOBAL): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
PUSH(mp_load_global(qst));
DISPATCH();
}
#else
ENTRY(MP_BC_LOAD_GLOBAL): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_map_elem_t *elem = mp_map_cached_lookup(&mp_globals_get()->map, qst, (uint8_t*)ip);
mp_obj_t obj;
if (elem != NULL) {
obj = elem->value;
} else {
obj = mp_load_global(qst);
}
PUSH(obj);
ip++;
DISPATCH();
}
#endif
#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
ENTRY(MP_BC_LOAD_ATTR): {
FRAME_UPDATE();
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
SET_TOP(mp_load_attr(TOP(), qst));
DISPATCH();
}
#else
ENTRY(MP_BC_LOAD_ATTR): {
FRAME_UPDATE();
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_obj_t top = TOP();
mp_map_elem_t *elem = NULL;
if (mp_obj_is_instance_dict_type(mp_obj_get_type(top))) {
mp_obj_instance_t *self = MP_OBJ_TO_PTR(top);
elem = mp_map_cached_lookup(&self->members, qst, (uint8_t*)ip);
}
mp_obj_t obj;
if (elem != NULL) {
obj = elem->value;
} else {
obj = mp_load_attr(top, qst);
}
SET_TOP(obj);
ip++;
DISPATCH();
}
#endif
ENTRY(MP_BC_LOAD_METHOD): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_load_method(*sp, qst, sp);
sp += 1;
DISPATCH();
}
ENTRY(MP_BC_LOAD_SUPER_METHOD): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
sp -= 1;
mp_load_super_method(qst, sp - 1);
DISPATCH();
}
ENTRY(MP_BC_LOAD_BUILD_CLASS):
MARK_EXC_IP_SELECTIVE();
PUSH(mp_load_build_class());
DISPATCH();
ENTRY(MP_BC_LOAD_SUBSCR): {
MARK_EXC_IP_SELECTIVE();
mp_obj_t index = POP();
SET_TOP(mp_obj_subscr(TOP(), index, MP_OBJ_SENTINEL));
DISPATCH();
}
ENTRY(MP_BC_STORE_FAST_N): {
DECODE_UINT;
fastn[-unum] = POP();
DISPATCH();
}
ENTRY(MP_BC_STORE_DEREF): {
DECODE_UINT;
mp_obj_cell_set(fastn[-unum], POP());
DISPATCH();
}
ENTRY(MP_BC_STORE_NAME_CONST):
ENTRY(MP_BC_STORE_NAME): {
MARK_EXC_IP_SELECTIVE();
byte opcode = ip[-1];
DECODE_QSTR;
mp_store_name(qst, POP(), opcode == MP_BC_STORE_NAME_CONST);
DISPATCH();
}
ENTRY(MP_BC_STORE_GLOBAL_CONST):
ENTRY(MP_BC_STORE_GLOBAL): {
MARK_EXC_IP_SELECTIVE();
byte opcode = ip[-1];
DECODE_QSTR;
mp_store_global(qst, POP(), opcode == MP_BC_STORE_GLOBAL_CONST);
DISPATCH();
}
#if !MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
ENTRY(MP_BC_STORE_ATTR): {
FRAME_UPDATE();
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_store_attr(sp[0], qst, sp[-1]);
sp -= 2;
DISPATCH();
}
#else
// This caching code works with MICROPY_PY_BUILTINS_PROPERTY and/or
// MICROPY_PY_DESCRIPTORS enabled because if the attr exists in
// self->members then it can't be a property or have descriptors. A
// consequence of this is that we can't use MP_MAP_LOOKUP_ADD_IF_NOT_FOUND
// in the fast-path below, because that store could override a property.
ENTRY(MP_BC_STORE_ATTR): {
FRAME_UPDATE();
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_map_elem_t *elem = NULL;
mp_obj_t top = TOP();
if (mp_obj_is_instance_dict_type(mp_obj_get_type(top)) && sp[-1] != MP_OBJ_NULL) {
mp_obj_instance_t *self = MP_OBJ_TO_PTR(top);
elem = mp_map_cached_lookup(&self->members, qst, (uint8_t*)ip);
}
if (elem != NULL) {
elem->value = sp[-1];
} else {
mp_store_attr(sp[0], qst, sp[-1]);
}
sp -= 2;
ip++;
DISPATCH();
}
#endif
ENTRY(MP_BC_STORE_SUBSCR):
MARK_EXC_IP_SELECTIVE();
mp_obj_subscr(sp[-1], sp[0], sp[-2]);
sp -= 3;
DISPATCH();
ENTRY(MP_BC_DELETE_FAST): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
if (fastn[-unum] == MP_OBJ_NULL) {
goto local_name_error;
}
fastn[-unum] = MP_OBJ_NULL;
DISPATCH();
}
ENTRY(MP_BC_DELETE_DEREF): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
if (mp_obj_cell_get(fastn[-unum]) == MP_OBJ_NULL) {
goto local_name_error;
}
mp_obj_cell_set(fastn[-unum], MP_OBJ_NULL);
DISPATCH();
}
ENTRY(MP_BC_DELETE_NAME): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_delete_name(qst);
DISPATCH();
}
ENTRY(MP_BC_DELETE_GLOBAL): {
MARK_EXC_IP_SELECTIVE();
DECODE_QSTR;
mp_delete_global(qst);
DISPATCH();
}
ENTRY(MP_BC_DUP_TOP): {
mp_obj_t top = TOP();
PUSH(top);
DISPATCH();
}
ENTRY(MP_BC_DUP_TOP_TWO):
sp += 2;
sp[0] = sp[-2];
sp[-1] = sp[-3];
DISPATCH();
ENTRY(MP_BC_POP_TOP):
sp -= 1;
DISPATCH();
ENTRY(MP_BC_ROT_TWO): {
mp_obj_t top = sp[0];
sp[0] = sp[-1];
sp[-1] = top;
DISPATCH();
}
ENTRY(MP_BC_ROT_THREE): {
mp_obj_t top = sp[0];
sp[0] = sp[-1];
sp[-1] = sp[-2];
sp[-2] = top;
DISPATCH();
}
ENTRY(MP_BC_JUMP): {
DECODE_SLABEL;
ip += slab;
DISPATCH_WITH_PEND_EXC_CHECK();
}
ENTRY(MP_BC_POP_JUMP_IF_TRUE): {
DECODE_SLABEL;
if (mp_obj_is_true(POP())) {
ip += slab;
}
DISPATCH_WITH_PEND_EXC_CHECK();
}
ENTRY(MP_BC_POP_JUMP_IF_FALSE): {
DECODE_SLABEL;
if (!mp_obj_is_true(POP())) {
ip += slab;
}
DISPATCH_WITH_PEND_EXC_CHECK();
}
ENTRY(MP_BC_JUMP_IF_TRUE_OR_POP): {
DECODE_SLABEL;
if (mp_obj_is_true(TOP())) {
ip += slab;
} else {
sp--;
}
DISPATCH_WITH_PEND_EXC_CHECK();
}
ENTRY(MP_BC_JUMP_IF_FALSE_OR_POP): {
DECODE_SLABEL;
if (mp_obj_is_true(TOP())) {
sp--;
} else {
ip += slab;
}
DISPATCH_WITH_PEND_EXC_CHECK();
}
ENTRY(MP_BC_SETUP_WITH): {
MARK_EXC_IP_SELECTIVE();
// stack: (..., ctx_mgr)
mp_obj_t obj = TOP();
mp_load_method(obj, MP_QSTR___exit__, sp);
mp_load_method(obj, MP_QSTR___enter__, sp + 2);
mp_obj_t ret = mp_call_method_n_kw(0, 0, sp + 2);
sp += 1;
PUSH_EXC_BLOCK(1);
PUSH(ret);
// stack: (..., __exit__, ctx_mgr, as_value)
DISPATCH();
}
ENTRY(MP_BC_WITH_CLEANUP): {
MARK_EXC_IP_SELECTIVE();
// Arriving here, there's "exception control block" on top of stack,
// and __exit__ method (with self) underneath it. Bytecode calls __exit__,
// and "deletes" it off stack, shifting "exception control block"
// to its place.
// The bytecode emitter ensures that there is enough space on the Python
// value stack to hold the __exit__ method plus an additional 4 entries.
if (TOP() == mp_const_none) {
// stack: (..., __exit__, ctx_mgr, None)
sp[1] = mp_const_none;
sp[2] = mp_const_none;
sp -= 2;
mp_call_method_n_kw(3, 0, sp);
SET_TOP(mp_const_none);
} else if (mp_obj_is_small_int(TOP())) {
// Getting here there are two distinct cases:
// - unwind return, stack: (..., __exit__, ctx_mgr, ret_val, SMALL_INT(-1))
// - unwind jump, stack: (..., __exit__, ctx_mgr, dest_ip, SMALL_INT(num_exc))
// For both cases we do exactly the same thing.
mp_obj_t data = sp[-1];
mp_obj_t cause = sp[0];
sp[-1] = mp_const_none;
sp[0] = mp_const_none;
sp[1] = mp_const_none;
mp_call_method_n_kw(3, 0, sp - 3);
sp[-3] = data;
sp[-2] = cause;
sp -= 2; // we removed (__exit__, ctx_mgr)
} else {
assert(mp_obj_is_exception_instance(TOP()));
// stack: (..., __exit__, ctx_mgr, exc_instance)
// Need to pass (exc_type, exc_instance, None) as arguments to __exit__.
sp[1] = sp[0];
sp[0] = MP_OBJ_FROM_PTR(mp_obj_get_type(sp[0]));
sp[2] = mp_const_none;
sp -= 2;
mp_obj_t ret_value = mp_call_method_n_kw(3, 0, sp);
if (mp_obj_is_true(ret_value)) {
// We need to silence/swallow the exception. This is done
// by popping the exception and the __exit__ handler and
// replacing it with None, which signals END_FINALLY to just
// execute the finally handler normally.
SET_TOP(mp_const_none);
} else {
// We need to re-raise the exception. We pop __exit__ handler
// by copying the exception instance down to the new top-of-stack.
sp[0] = sp[3];
}
}
DISPATCH();
}
ENTRY(MP_BC_UNWIND_JUMP): {
MARK_EXC_IP_SELECTIVE();
DECODE_SLABEL;
PUSH((mp_obj_t)(mp_uint_t)(uintptr_t)(ip + slab)); // push destination ip for jump
PUSH((mp_obj_t)(mp_uint_t)(*ip)); // push number of exception handlers to unwind (0x80 bit set if we also need to pop stack)
unwind_jump:;
mp_uint_t unum = (mp_uint_t)POP(); // get number of exception handlers to unwind
while ((unum & 0x7f) > 0) {
unum -= 1;
assert(exc_sp >= exc_stack);
if (MP_TAGPTR_TAG1(exc_sp->val_sp)) {
if (exc_sp->handler > ip) {
// Found a finally handler that isn't active; run it.
// Getting here the stack looks like:
// (..., X, dest_ip)
// where X is pointed to by exc_sp->val_sp and in the case
// of a "with" block contains the context manager info.
assert(&sp[-1] == MP_TAGPTR_PTR(exc_sp->val_sp));
// We're going to run "finally" code as a coroutine
// (not calling it recursively). Set up a sentinel
// on the stack so it can return back to us when it is
// done (when WITH_CLEANUP or END_FINALLY reached).
// The sentinel is the number of exception handlers left to
// unwind, which is a non-negative integer.
PUSH(MP_OBJ_NEW_SMALL_INT(unum));
ip = exc_sp->handler;
goto dispatch_loop;
} else {
// Found a finally handler that is already active; cancel it.
CANCEL_ACTIVE_FINALLY(sp);
}
}
POP_EXC_BLOCK();
}
ip = (const byte*)MP_OBJ_TO_PTR(POP()); // pop destination ip for jump
if (unum != 0) {
// pop the exhausted iterator
sp -= MP_OBJ_ITER_BUF_NSLOTS;
}
DISPATCH_WITH_PEND_EXC_CHECK();
}
ENTRY(MP_BC_SETUP_EXCEPT):
ENTRY(MP_BC_SETUP_FINALLY): {
MARK_EXC_IP_SELECTIVE();
#if SELECTIVE_EXC_IP
PUSH_EXC_BLOCK((code_state->ip[-1] == MP_BC_SETUP_FINALLY) ? 1 : 0);
#else
PUSH_EXC_BLOCK((code_state->ip[0] == MP_BC_SETUP_FINALLY) ? 1 : 0);
#endif
DISPATCH();
}
ENTRY(MP_BC_END_FINALLY):
MARK_EXC_IP_SELECTIVE();
// if TOS is None, just pops it and continues
// if TOS is an integer, finishes coroutine and returns control to caller
// if TOS is an exception, reraises the exception
assert(exc_sp >= exc_stack);
POP_EXC_BLOCK();
if (TOP() == mp_const_none) {
sp--;
} else if (mp_obj_is_small_int(TOP())) {
// We finished "finally" coroutine and now dispatch back
// to our caller, based on TOS value
mp_int_t cause = MP_OBJ_SMALL_INT_VALUE(POP());
if (cause < 0) {
// A negative cause indicates unwind return
goto unwind_return;
} else {
// Otherwise it's an unwind jump and we must push as a raw
// number the number of exception handlers to unwind
PUSH((mp_obj_t)cause);
goto unwind_jump;
}
} else {
assert(mp_obj_is_exception_instance(TOP()));
RAISE(TOP());
}
DISPATCH();
ENTRY(MP_BC_GET_ITER):
MARK_EXC_IP_SELECTIVE();
SET_TOP(mp_getiter(TOP(), NULL));
DISPATCH();
// An iterator for a for-loop takes MP_OBJ_ITER_BUF_NSLOTS slots on
// the Python value stack. These slots are either used to store the
// iterator object itself, or the first slot is MP_OBJ_NULL and
// the second slot holds a reference to the iterator object.
ENTRY(MP_BC_GET_ITER_STACK): {
MARK_EXC_IP_SELECTIVE();
mp_obj_t obj = TOP();
mp_obj_iter_buf_t *iter_buf = (mp_obj_iter_buf_t*)sp;
sp += MP_OBJ_ITER_BUF_NSLOTS - 1;
obj = mp_getiter(obj, iter_buf);
if (obj != MP_OBJ_FROM_PTR(iter_buf)) {
// Iterator didn't use the stack so indicate that with MP_OBJ_NULL.
sp[-MP_OBJ_ITER_BUF_NSLOTS + 1] = MP_OBJ_NULL;
sp[-MP_OBJ_ITER_BUF_NSLOTS + 2] = obj;
}
DISPATCH();
}
ENTRY(MP_BC_FOR_ITER): {
FRAME_UPDATE();
MARK_EXC_IP_SELECTIVE();
DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward
code_state->sp = sp;
mp_obj_t obj;
if (sp[-MP_OBJ_ITER_BUF_NSLOTS + 1] == MP_OBJ_NULL) {
obj = sp[-MP_OBJ_ITER_BUF_NSLOTS + 2];
} else {
obj = MP_OBJ_FROM_PTR(&sp[-MP_OBJ_ITER_BUF_NSLOTS + 1]);
}
mp_obj_t value = mp_iternext_allow_raise(obj);
if (value == MP_OBJ_STOP_ITERATION) {
sp -= MP_OBJ_ITER_BUF_NSLOTS; // pop the exhausted iterator
ip += ulab; // jump to after for-block
} else {
PUSH(value); // push the next iteration value
#if MICROPY_PY_SYS_SETTRACE
// LINE event should trigger for every iteration so invalidate last trigger
if (code_state->frame) {
code_state->frame->lineno = 0;
}
#endif
}
DISPATCH();
}
ENTRY(MP_BC_POP_EXCEPT_JUMP): {
assert(exc_sp >= exc_stack);
POP_EXC_BLOCK();
DECODE_ULABEL;
ip += ulab;
DISPATCH_WITH_PEND_EXC_CHECK();
}
ENTRY(MP_BC_BUILD_TUPLE): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
sp -= unum - 1;
SET_TOP(mp_obj_new_tuple(unum, sp));
DISPATCH();
}
ENTRY(MP_BC_BUILD_LIST): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
sp -= unum - 1;
SET_TOP(mp_obj_new_list(unum, sp));
DISPATCH();
}
ENTRY(MP_BC_BUILD_MAP): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
PUSH(mp_obj_new_dict(unum));
DISPATCH();
}
ENTRY(MP_BC_STORE_MAP):
MARK_EXC_IP_SELECTIVE();
sp -= 2;
mp_obj_dict_store(sp[0], sp[2], sp[1]);
DISPATCH();
#if MICROPY_PY_BUILTINS_SET
ENTRY(MP_BC_BUILD_SET): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
sp -= unum - 1;
SET_TOP(mp_obj_new_set(unum, sp));
DISPATCH();
}
#endif
#if MICROPY_PY_BUILTINS_SLICE
ENTRY(MP_BC_BUILD_SLICE): {
MARK_EXC_IP_SELECTIVE();
mp_obj_t step = mp_const_none;
if (*ip++ == 3) {
// 3-argument slice includes step
step = POP();
}
mp_obj_t stop = POP();
mp_obj_t start = TOP();
SET_TOP(mp_obj_new_slice(start, stop, step));
DISPATCH();
}
#endif
ENTRY(MP_BC_STORE_COMP): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
mp_obj_t obj = sp[-(unum >> 2)];
if ((unum & 3) == 0) {
mp_obj_list_append(obj, sp[0]);
sp--;
} else if (!MICROPY_PY_BUILTINS_SET || (unum & 3) == 1) {
mp_obj_dict_store(obj, sp[0], sp[-1]);
sp -= 2;
#if MICROPY_PY_BUILTINS_SET
} else {
mp_obj_set_store(obj, sp[0]);
sp--;
#endif
}
DISPATCH();
}
ENTRY(MP_BC_UNPACK_SEQUENCE): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
mp_unpack_sequence(sp[0], unum, sp);
sp += unum - 1;
DISPATCH();
}
ENTRY(MP_BC_UNPACK_EX): {
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
mp_unpack_ex(sp[0], unum, sp);
sp += (unum & 0xff) + ((unum >> 8) & 0xff);
DISPATCH();
}
ENTRY(MP_BC_MAKE_FUNCTION): {
DECODE_PTR;
PUSH(mp_make_function_from_raw_code(ptr, MP_OBJ_NULL, MP_OBJ_NULL));
DISPATCH();
}
ENTRY(MP_BC_MAKE_FUNCTION_DEFARGS): {
DECODE_PTR;
// Stack layout: def_tuple def_dict <- TOS
mp_obj_t def_dict = POP();
SET_TOP(mp_make_function_from_raw_code(ptr, TOP(), def_dict));
DISPATCH();
}
ENTRY(MP_BC_MAKE_CLOSURE): {
DECODE_PTR;
size_t n_closed_over = *ip++;
// Stack layout: closed_overs <- TOS
sp -= n_closed_over - 1;
SET_TOP(mp_make_closure_from_raw_code(ptr, n_closed_over, sp));
DISPATCH();
}
ENTRY(MP_BC_MAKE_CLOSURE_DEFARGS): {
DECODE_PTR;
size_t n_closed_over = *ip++;
// Stack layout: def_tuple def_dict closed_overs <- TOS
sp -= 2 + n_closed_over - 1;
SET_TOP(mp_make_closure_from_raw_code(ptr, 0x100 | n_closed_over, sp));
DISPATCH();
}
ENTRY(MP_BC_CALL_FUNCTION): {
FRAME_UPDATE();
MARK_EXC_IP_SELECTIVE();
DECODE_UINT;
// unum & 0xff == n_positional
// (unum >> 8) & 0xff == n_keyword
sp -= (unum & 0xff) + ((unum >> 7) & 0x1fe);
#if MICROPY_STACKLESS
if (mp_obj_get_type(*sp) == &mp_type_fun_bc) {
code_state->ip = ip;
code_state->sp = sp;
code_state->exc_sp_idx = MP_CODE_STATE_EXC_SP_IDX_FROM_PTR(exc_stack, exc_sp);
mp_code_state_t *new_state = mp_obj_fun_bc_prepare_codestate(*sp, unum & 0xff, (unum >> 8) & 0xff, sp + 1);
#if !MICROPY_ENABLE_PYSTACK
if (new_state == NULL) {
// Couldn't allocate codestate on heap: in the strict case raise
// an exception, otherwise just fall through to stack allocation.
#if MICROPY_STACKLESS_STRICT
deep_recursion_error:
mp_raise_recursion_depth();
#endif
} else