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
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
|
/* Execute compiled code */
/* XXX TO DO:
XXX speed up searching for keywords by using a dictionary
XXX document it!
*/
/* enable more aggressive intra-module optimizations, where available */
#define PY_LOCAL_AGGRESSIVE
#include "Python.h"
#include "code.h"
#include "frameobject.h"
#include "opcode.h"
#include "structmember.h"
#include <ctype.h>
#ifndef WITH_TSC
#define READ_TIMESTAMP(var)
#else
typedef unsigned long long uint64;
/* PowerPC support.
"__ppc__" appears to be the preprocessor definition to detect on OS X, whereas
"__powerpc__" appears to be the correct one for Linux with GCC
*/
#if defined(__ppc__) || defined (__powerpc__)
#define READ_TIMESTAMP(var) ppc_getcounter(&var)
static void
ppc_getcounter(uint64 *v)
{
register unsigned long tbu, tb, tbu2;
loop:
asm volatile ("mftbu %0" : "=r" (tbu) );
asm volatile ("mftb %0" : "=r" (tb) );
asm volatile ("mftbu %0" : "=r" (tbu2));
if (__builtin_expect(tbu != tbu2, 0)) goto loop;
/* The slightly peculiar way of writing the next lines is
compiled better by GCC than any other way I tried. */
((long*)(v))[0] = tbu;
((long*)(v))[1] = tb;
}
#elif defined(__i386__)
/* this is for linux/x86 (and probably any other GCC/x86 combo) */
#define READ_TIMESTAMP(val) \
__asm__ __volatile__("rdtsc" : "=A" (val))
#elif defined(__x86_64__)
/* for gcc/x86_64, the "A" constraint in DI mode means *either* rax *or* rdx;
not edx:eax as it does for i386. Since rdtsc puts its result in edx:eax
even in 64-bit mode, we need to use "a" and "d" for the lower and upper
32-bit pieces of the result. */
#define READ_TIMESTAMP(val) \
__asm__ __volatile__("rdtsc" : \
"=a" (((int*)&(val))[0]), "=d" (((int*)&(val))[1]));
#else
#error "Don't know how to implement timestamp counter for this architecture"
#endif
void dump_tsc(int opcode, int ticked, uint64 inst0, uint64 inst1,
uint64 loop0, uint64 loop1, uint64 intr0, uint64 intr1)
{
uint64 intr, inst, loop;
PyThreadState *tstate = PyThreadState_Get();
if (!tstate->interp->tscdump)
return;
intr = intr1 - intr0;
inst = inst1 - inst0 - intr;
loop = loop1 - loop0 - intr;
fprintf(stderr, "opcode=%03d t=%d inst=%06lld loop=%06lld\n",
opcode, ticked, inst, loop);
}
#endif
/* Turn this on if your compiler chokes on the big switch: */
/* #define CASE_TOO_BIG 1 */
#ifdef Py_DEBUG
/* For debugging the interpreter: */
#define LLTRACE 1 /* Low-level trace feature */
#define CHECKEXC 1 /* Double-check exception checking */
#endif
typedef PyObject *(*callproc)(PyObject *, PyObject *, PyObject *);
/* Forward declarations */
#ifdef WITH_TSC
static PyObject * call_function(PyObject ***, int, uint64*, uint64*);
#else
static PyObject * call_function(PyObject ***, int);
#endif
static PyObject * fast_function(PyObject *, PyObject ***, int, int, int);
static PyObject * do_call(PyObject *, PyObject ***, int, int);
static PyObject * ext_do_call(PyObject *, PyObject ***, int, int, int);
static PyObject * update_keyword_args(PyObject *, int, PyObject ***,
PyObject *);
static PyObject * update_star_args(int, int, PyObject *, PyObject ***);
static PyObject * load_args(PyObject ***, int);
#define CALL_FLAG_VAR 1
#define CALL_FLAG_KW 2
#ifdef LLTRACE
static int lltrace;
static int prtrace(PyObject *, char *);
#endif
static int call_trace(Py_tracefunc, PyObject *, PyFrameObject *,
int, PyObject *);
static int call_trace_protected(Py_tracefunc, PyObject *,
PyFrameObject *, int, PyObject *);
static void call_exc_trace(Py_tracefunc, PyObject *, PyFrameObject *);
static int maybe_call_line_trace(Py_tracefunc, PyObject *,
PyFrameObject *, int *, int *, int *);
static PyObject * cmp_outcome(int, PyObject *, PyObject *);
static PyObject * import_from(PyObject *, PyObject *);
static int import_all_from(PyObject *, PyObject *);
static void format_exc_check_arg(PyObject *, const char *, PyObject *);
static void format_exc_unbound(PyCodeObject *co, int oparg);
static PyObject * unicode_concatenate(PyObject *, PyObject *,
PyFrameObject *, unsigned char *);
static PyObject * special_lookup(PyObject *, char *, PyObject **);
#define NAME_ERROR_MSG \
"name '%.200s' is not defined"
#define GLOBAL_NAME_ERROR_MSG \
"global name '%.200s' is not defined"
#define UNBOUNDLOCAL_ERROR_MSG \
"local variable '%.200s' referenced before assignment"
#define UNBOUNDFREE_ERROR_MSG \
"free variable '%.200s' referenced before assignment" \
" in enclosing scope"
/* Dynamic execution profile */
#ifdef DYNAMIC_EXECUTION_PROFILE
#ifdef DXPAIRS
static long dxpairs[257][256];
#define dxp dxpairs[256]
#else
static long dxp[256];
#endif
#endif
/* Function call profile */
#ifdef CALL_PROFILE
#define PCALL_NUM 11
static int pcall[PCALL_NUM];
#define PCALL_ALL 0
#define PCALL_FUNCTION 1
#define PCALL_FAST_FUNCTION 2
#define PCALL_FASTER_FUNCTION 3
#define PCALL_METHOD 4
#define PCALL_BOUND_METHOD 5
#define PCALL_CFUNCTION 6
#define PCALL_TYPE 7
#define PCALL_GENERATOR 8
#define PCALL_OTHER 9
#define PCALL_POP 10
/* Notes about the statistics
PCALL_FAST stats
FAST_FUNCTION means no argument tuple needs to be created.
FASTER_FUNCTION means that the fast-path frame setup code is used.
If there is a method call where the call can be optimized by changing
the argument tuple and calling the function directly, it gets recorded
twice.
As a result, the relationship among the statistics appears to be
PCALL_ALL == PCALL_FUNCTION + PCALL_METHOD - PCALL_BOUND_METHOD +
PCALL_CFUNCTION + PCALL_TYPE + PCALL_GENERATOR + PCALL_OTHER
PCALL_FUNCTION > PCALL_FAST_FUNCTION > PCALL_FASTER_FUNCTION
PCALL_METHOD > PCALL_BOUND_METHOD
*/
#define PCALL(POS) pcall[POS]++
PyObject *
PyEval_GetCallStats(PyObject *self)
{
return Py_BuildValue("iiiiiiiiiii",
pcall[0], pcall[1], pcall[2], pcall[3],
pcall[4], pcall[5], pcall[6], pcall[7],
pcall[8], pcall[9], pcall[10]);
}
#else
#define PCALL(O)
PyObject *
PyEval_GetCallStats(PyObject *self)
{
Py_INCREF(Py_None);
return Py_None;
}
#endif
#ifdef WITH_THREAD
#define GIL_REQUEST _Py_atomic_load_relaxed(&gil_drop_request)
#else
#define GIL_REQUEST 0
#endif
/* This can set eval_breaker to 0 even though gil_drop_request became
1. We believe this is all right because the eval loop will release
the GIL eventually anyway. */
#define COMPUTE_EVAL_BREAKER() \
_Py_atomic_store_relaxed( \
&eval_breaker, \
GIL_REQUEST | \
_Py_atomic_load_relaxed(&pendingcalls_to_do) | \
pending_async_exc)
#ifdef WITH_THREAD
#define SET_GIL_DROP_REQUEST() \
do { \
_Py_atomic_store_relaxed(&gil_drop_request, 1); \
_Py_atomic_store_relaxed(&eval_breaker, 1); \
} while (0)
#define RESET_GIL_DROP_REQUEST() \
do { \
_Py_atomic_store_relaxed(&gil_drop_request, 0); \
COMPUTE_EVAL_BREAKER(); \
} while (0)
#endif
/* Pending calls are only modified under pending_lock */
#define SIGNAL_PENDING_CALLS() \
do { \
_Py_atomic_store_relaxed(&pendingcalls_to_do, 1); \
_Py_atomic_store_relaxed(&eval_breaker, 1); \
} while (0)
#define UNSIGNAL_PENDING_CALLS() \
do { \
_Py_atomic_store_relaxed(&pendingcalls_to_do, 0); \
COMPUTE_EVAL_BREAKER(); \
} while (0)
#define SIGNAL_ASYNC_EXC() \
do { \
pending_async_exc = 1; \
_Py_atomic_store_relaxed(&eval_breaker, 1); \
} while (0)
#define UNSIGNAL_ASYNC_EXC() \
do { pending_async_exc = 0; COMPUTE_EVAL_BREAKER(); } while (0)
#ifdef WITH_THREAD
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include "pythread.h"
static PyThread_type_lock pending_lock = 0; /* for pending calls */
static long main_thread = 0;
/* This single variable consolidates all requests to break out of the fast path
in the eval loop. */
static _Py_atomic_int eval_breaker = {0};
/* Request for dropping the GIL */
static _Py_atomic_int gil_drop_request = {0};
/* Request for running pending calls. */
static _Py_atomic_int pendingcalls_to_do = {0};
/* Request for looking at the `async_exc` field of the current thread state.
Guarded by the GIL. */
static int pending_async_exc = 0;
#include "ceval_gil.h"
int
PyEval_ThreadsInitialized(void)
{
return gil_created();
}
void
PyEval_InitThreads(void)
{
if (gil_created())
return;
create_gil();
take_gil(PyThreadState_GET());
main_thread = PyThread_get_thread_ident();
if (!pending_lock)
pending_lock = PyThread_allocate_lock();
}
void
_PyEval_FiniThreads(void)
{
if (!gil_created())
return;
destroy_gil();
assert(!gil_created());
}
void
PyEval_AcquireLock(void)
{
PyThreadState *tstate = PyThreadState_GET();
if (tstate == NULL)
Py_FatalError("PyEval_AcquireLock: current thread state is NULL");
take_gil(tstate);
}
void
PyEval_ReleaseLock(void)
{
/* This function must succeed when the current thread state is NULL.
We therefore avoid PyThreadState_GET() which dumps a fatal error
in debug mode.
*/
drop_gil((PyThreadState*)_Py_atomic_load_relaxed(
&_PyThreadState_Current));
}
void
PyEval_AcquireThread(PyThreadState *tstate)
{
if (tstate == NULL)
Py_FatalError("PyEval_AcquireThread: NULL new thread state");
/* Check someone has called PyEval_InitThreads() to create the lock */
assert(gil_created());
take_gil(tstate);
if (PyThreadState_Swap(tstate) != NULL)
Py_FatalError(
"PyEval_AcquireThread: non-NULL old thread state");
}
void
PyEval_ReleaseThread(PyThreadState *tstate)
{
if (tstate == NULL)
Py_FatalError("PyEval_ReleaseThread: NULL thread state");
if (PyThreadState_Swap(NULL) != tstate)
Py_FatalError("PyEval_ReleaseThread: wrong thread state");
drop_gil(tstate);
}
/* This function is called from PyOS_AfterFork to ensure that newly
created child processes don't hold locks referring to threads which
are not running in the child process. (This could also be done using
pthread_atfork mechanism, at least for the pthreads implementation.) */
void
PyEval_ReInitThreads(void)
{
PyObject *threading, *result;
PyThreadState *tstate = PyThreadState_GET();
if (!gil_created())
return;
recreate_gil();
pending_lock = PyThread_allocate_lock();
take_gil(tstate);
main_thread = PyThread_get_thread_ident();
/* Update the threading module with the new state.
*/
tstate = PyThreadState_GET();
threading = PyMapping_GetItemString(tstate->interp->modules,
"threading");
if (threading == NULL) {
/* threading not imported */
PyErr_Clear();
return;
}
result = PyObject_CallMethod(threading, "_after_fork", NULL);
if (result == NULL)
PyErr_WriteUnraisable(threading);
else
Py_DECREF(result);
Py_DECREF(threading);
}
#else
static _Py_atomic_int eval_breaker = {0};
static int pending_async_exc = 0;
#endif /* WITH_THREAD */
/* This function is used to signal that async exceptions are waiting to be
raised, therefore it is also useful in non-threaded builds. */
void
_PyEval_SignalAsyncExc(void)
{
SIGNAL_ASYNC_EXC();
}
/* Functions save_thread and restore_thread are always defined so
dynamically loaded modules needn't be compiled separately for use
with and without threads: */
PyThreadState *
PyEval_SaveThread(void)
{
PyThreadState *tstate = PyThreadState_Swap(NULL);
if (tstate == NULL)
Py_FatalError("PyEval_SaveThread: NULL tstate");
#ifdef WITH_THREAD
if (gil_created())
drop_gil(tstate);
#endif
return tstate;
}
void
PyEval_RestoreThread(PyThreadState *tstate)
{
if (tstate == NULL)
Py_FatalError("PyEval_RestoreThread: NULL tstate");
#ifdef WITH_THREAD
if (gil_created()) {
int err = errno;
take_gil(tstate);
/* _Py_Finalizing is protected by the GIL */
if (_Py_Finalizing && tstate != _Py_Finalizing) {
drop_gil(tstate);
PyThread_exit_thread();
assert(0); /* unreachable */
}
errno = err;
}
#endif
PyThreadState_Swap(tstate);
}
/* Mechanism whereby asynchronously executing callbacks (e.g. UNIX
signal handlers or Mac I/O completion routines) can schedule calls
to a function to be called synchronously.
The synchronous function is called with one void* argument.
It should return 0 for success or -1 for failure -- failure should
be accompanied by an exception.
If registry succeeds, the registry function returns 0; if it fails
(e.g. due to too many pending calls) it returns -1 (without setting
an exception condition).
Note that because registry may occur from within signal handlers,
or other asynchronous events, calling malloc() is unsafe!
#ifdef WITH_THREAD
Any thread can schedule pending calls, but only the main thread
will execute them.
There is no facility to schedule calls to a particular thread, but
that should be easy to change, should that ever be required. In
that case, the static variables here should go into the python
threadstate.
#endif
*/
#ifdef WITH_THREAD
/* The WITH_THREAD implementation is thread-safe. It allows
scheduling to be made from any thread, and even from an executing
callback.
*/
#define NPENDINGCALLS 32
static struct {
int (*func)(void *);
void *arg;
} pendingcalls[NPENDINGCALLS];
static int pendingfirst = 0;
static int pendinglast = 0;
static char pendingbusy = 0;
int
Py_AddPendingCall(int (*func)(void *), void *arg)
{
int i, j, result=0;
PyThread_type_lock lock = pending_lock;
/* try a few times for the lock. Since this mechanism is used
* for signal handling (on the main thread), there is a (slim)
* chance that a signal is delivered on the same thread while we
* hold the lock during the Py_MakePendingCalls() function.
* This avoids a deadlock in that case.
* Note that signals can be delivered on any thread. In particular,
* on Windows, a SIGINT is delivered on a system-created worker
* thread.
* We also check for lock being NULL, in the unlikely case that
* this function is called before any bytecode evaluation takes place.
*/
if (lock != NULL) {
for (i = 0; i<100; i++) {
if (PyThread_acquire_lock(lock, NOWAIT_LOCK))
break;
}
if (i == 100)
return -1;
}
i = pendinglast;
j = (i + 1) % NPENDINGCALLS;
if (j == pendingfirst) {
result = -1; /* Queue full */
} else {
pendingcalls[i].func = func;
pendingcalls[i].arg = arg;
pendinglast = j;
}
/* signal main loop */
SIGNAL_PENDING_CALLS();
if (lock != NULL)
PyThread_release_lock(lock);
return result;
}
int
Py_MakePendingCalls(void)
{
int i;
int r = 0;
if (!pending_lock) {
/* initial allocation of the lock */
pending_lock = PyThread_allocate_lock();
if (pending_lock == NULL)
return -1;
}
/* only service pending calls on main thread */
if (main_thread && PyThread_get_thread_ident() != main_thread)
return 0;
/* don't perform recursive pending calls */
if (pendingbusy)
return 0;
pendingbusy = 1;
/* perform a bounded number of calls, in case of recursion */
for (i=0; i<NPENDINGCALLS; i++) {
int j;
int (*func)(void *);
void *arg = NULL;
/* pop one item off the queue while holding the lock */
PyThread_acquire_lock(pending_lock, WAIT_LOCK);
j = pendingfirst;
if (j == pendinglast) {
func = NULL; /* Queue empty */
} else {
func = pendingcalls[j].func;
arg = pendingcalls[j].arg;
pendingfirst = (j + 1) % NPENDINGCALLS;
}
if (pendingfirst != pendinglast)
SIGNAL_PENDING_CALLS();
else
UNSIGNAL_PENDING_CALLS();
PyThread_release_lock(pending_lock);
/* having released the lock, perform the callback */
if (func == NULL)
break;
r = func(arg);
if (r)
break;
}
pendingbusy = 0;
return r;
}
#else /* if ! defined WITH_THREAD */
/*
WARNING! ASYNCHRONOUSLY EXECUTING CODE!
This code is used for signal handling in python that isn't built
with WITH_THREAD.
Don't use this implementation when Py_AddPendingCalls() can happen
on a different thread!
There are two possible race conditions:
(1) nested asynchronous calls to Py_AddPendingCall()
(2) AddPendingCall() calls made while pending calls are being processed.
(1) is very unlikely because typically signal delivery
is blocked during signal handling. So it should be impossible.
(2) is a real possibility.
The current code is safe against (2), but not against (1).
The safety against (2) is derived from the fact that only one
thread is present, interrupted by signals, and that the critical
section is protected with the "busy" variable. On Windows, which
delivers SIGINT on a system thread, this does not hold and therefore
Windows really shouldn't use this version.
The two threads could theoretically wiggle around the "busy" variable.
*/
#define NPENDINGCALLS 32
static struct {
int (*func)(void *);
void *arg;
} pendingcalls[NPENDINGCALLS];
static volatile int pendingfirst = 0;
static volatile int pendinglast = 0;
static _Py_atomic_int pendingcalls_to_do = {0};
int
Py_AddPendingCall(int (*func)(void *), void *arg)
{
static volatile int busy = 0;
int i, j;
/* XXX Begin critical section */
if (busy)
return -1;
busy = 1;
i = pendinglast;
j = (i + 1) % NPENDINGCALLS;
if (j == pendingfirst) {
busy = 0;
return -1; /* Queue full */
}
pendingcalls[i].func = func;
pendingcalls[i].arg = arg;
pendinglast = j;
SIGNAL_PENDING_CALLS();
busy = 0;
/* XXX End critical section */
return 0;
}
int
Py_MakePendingCalls(void)
{
static int busy = 0;
if (busy)
return 0;
busy = 1;
UNSIGNAL_PENDING_CALLS();
for (;;) {
int i;
int (*func)(void *);
void *arg;
i = pendingfirst;
if (i == pendinglast)
break; /* Queue empty */
func = pendingcalls[i].func;
arg = pendingcalls[i].arg;
pendingfirst = (i + 1) % NPENDINGCALLS;
if (func(arg) < 0) {
busy = 0;
SIGNAL_PENDING_CALLS(); /* We're not done yet */
return -1;
}
}
busy = 0;
return 0;
}
#endif /* WITH_THREAD */
/* The interpreter's recursion limit */
#ifndef Py_DEFAULT_RECURSION_LIMIT
#define Py_DEFAULT_RECURSION_LIMIT 1000
#endif
static int recursion_limit = Py_DEFAULT_RECURSION_LIMIT;
int _Py_CheckRecursionLimit = Py_DEFAULT_RECURSION_LIMIT;
int
Py_GetRecursionLimit(void)
{
return recursion_limit;
}
void
Py_SetRecursionLimit(int new_limit)
{
recursion_limit = new_limit;
_Py_CheckRecursionLimit = recursion_limit;
}
/* the macro Py_EnterRecursiveCall() only calls _Py_CheckRecursiveCall()
if the recursion_depth reaches _Py_CheckRecursionLimit.
If USE_STACKCHECK, the macro decrements _Py_CheckRecursionLimit
to guarantee that _Py_CheckRecursiveCall() is regularly called.
Without USE_STACKCHECK, there is no need for this. */
int
_Py_CheckRecursiveCall(char *where)
{
PyThreadState *tstate = PyThreadState_GET();
#ifdef USE_STACKCHECK
if (PyOS_CheckStack()) {
--tstate->recursion_depth;
PyErr_SetString(PyExc_MemoryError, "Stack overflow");
return -1;
}
#endif
_Py_CheckRecursionLimit = recursion_limit;
if (tstate->recursion_critical)
/* Somebody asked that we don't check for recursion. */
return 0;
if (tstate->overflowed) {
if (tstate->recursion_depth > recursion_limit + 50) {
/* Overflowing while handling an overflow. Give up. */
Py_FatalError("Cannot recover from stack overflow.");
}
return 0;
}
if (tstate->recursion_depth > recursion_limit) {
--tstate->recursion_depth;
tstate->overflowed = 1;
PyErr_Format(PyExc_RuntimeError,
"maximum recursion depth exceeded%s",
where);
return -1;
}
return 0;
}
/* Status code for main loop (reason for stack unwind) */
enum why_code {
WHY_NOT = 0x0001, /* No error */
WHY_EXCEPTION = 0x0002, /* Exception occurred */
WHY_RERAISE = 0x0004, /* Exception re-raised by 'finally' */
WHY_RETURN = 0x0008, /* 'return' statement */
WHY_BREAK = 0x0010, /* 'break' statement */
WHY_CONTINUE = 0x0020, /* 'continue' statement */
WHY_YIELD = 0x0040, /* 'yield' operator */
WHY_SILENCED = 0x0080 /* Exception silenced by 'with' */
};
static enum why_code do_raise(PyObject *, PyObject *);
static int unpack_iterable(PyObject *, int, int, PyObject **);
/* Records whether tracing is on for any thread. Counts the number of
threads for which tstate->c_tracefunc is non-NULL, so if the value
is 0, we know we don't have to check this thread's c_tracefunc.
This speeds up the if statement in PyEval_EvalFrameEx() after
fast_next_opcode*/
static int _Py_TracingPossible = 0;
PyObject *
PyEval_EvalCode(PyObject *co, PyObject *globals, PyObject *locals)
{
return PyEval_EvalCodeEx(co,
globals, locals,
(PyObject **)NULL, 0,
(PyObject **)NULL, 0,
(PyObject **)NULL, 0,
NULL, NULL);
}
/* Interpreter main loop */
PyObject *
PyEval_EvalFrame(PyFrameObject *f) {
/* This is for backward compatibility with extension modules that
used this API; core interpreter code should call
PyEval_EvalFrameEx() */
return PyEval_EvalFrameEx(f, 0);
}
PyObject *
PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
{
#ifdef DXPAIRS
int lastopcode = 0;
#endif
register PyObject **stack_pointer; /* Next free slot in value stack */
register unsigned char *next_instr;
register int opcode; /* Current opcode */
register int oparg; /* Current opcode argument, if any */
register enum why_code why; /* Reason for block stack unwind */
register int err; /* Error status -- nonzero if error */
register PyObject *x; /* Result object -- NULL if error */
register PyObject *v; /* Temporary objects popped off stack */
register PyObject *w;
register PyObject *u;
register PyObject *t;
register PyObject **fastlocals, **freevars;
PyObject *retval = NULL; /* Return value */
PyThreadState *tstate = PyThreadState_GET();
PyCodeObject *co;
/* when tracing we set things up so that
not (instr_lb <= current_bytecode_offset < instr_ub)
is true when the line being executed has changed. The
initial values are such as to make this false the first
time it is tested. */
int instr_ub = -1, instr_lb = 0, instr_prev = -1;
unsigned char *first_instr;
PyObject *names;
PyObject *consts;
#if defined(Py_DEBUG) || defined(LLTRACE)
/* Make it easier to find out where we are with a debugger */
char *filename;
#endif
/* Computed GOTOs, or
the-optimization-commonly-but-improperly-known-as-"threaded code"
using gcc's labels-as-values extension
(http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html).
The traditional bytecode evaluation loop uses a "switch" statement, which
decent compilers will optimize as a single indirect branch instruction
combined with a lookup table of jump addresses. However, since the
indirect jump instruction is shared by all opcodes, the CPU will have a
hard time making the right prediction for where to jump next (actually,
it will be always wrong except in the uncommon case of a sequence of
several identical opcodes).
"Threaded code" in contrast, uses an explicit jump table and an explicit
indirect jump instruction at the end of each opcode. Since the jump
instruction is at a different address for each opcode, the CPU will make a
separate prediction for each of these instructions, which is equivalent to
predicting the second opcode of each opcode pair. These predictions have
a much better chance to turn out valid, especially in small bytecode loops.
A mispredicted branch on a modern CPU flushes the whole pipeline and
can cost several CPU cycles (depending on the pipeline depth),
and potentially many more instructions (depending on the pipeline width).
A correctly predicted branch, however, is nearly free.
At the time of this writing, the "threaded code" version is up to 15-20%
faster than the normal "switch" version, depending on the compiler and the
CPU architecture.
We disable the optimization if DYNAMIC_EXECUTION_PROFILE is defined,
because it would render the measurements invalid.
NOTE: care must be taken that the compiler doesn't try to "optimize" the
indirect jumps by sharing them between all opcodes. Such optimizations
can be disabled on gcc by using the -fno-gcse flag (or possibly
-fno-crossjumping).
*/
#ifdef DYNAMIC_EXECUTION_PROFILE
#undef USE_COMPUTED_GOTOS
#define USE_COMPUTED_GOTOS 0
#endif
#ifdef HAVE_COMPUTED_GOTOS
#ifndef USE_COMPUTED_GOTOS
#define USE_COMPUTED_GOTOS 1
#endif
#else
#if defined(USE_COMPUTED_GOTOS) && USE_COMPUTED_GOTOS
#error "Computed gotos are not supported on this compiler."
#endif
#undef USE_COMPUTED_GOTOS
#define USE_COMPUTED_GOTOS 0
#endif
#if USE_COMPUTED_GOTOS
/* Import the static jump table */
#include "opcode_targets.h"
/* This macro is used when several opcodes defer to the same implementation
(e.g. SETUP_LOOP, SETUP_FINALLY) */
#define TARGET_WITH_IMPL(op, impl) \
TARGET_##op: \
opcode = op; \
if (HAS_ARG(op)) \
oparg = NEXTARG(); \
case op: \
goto impl; \
#define TARGET(op) \
TARGET_##op: \
opcode = op; \
if (HAS_ARG(op)) \
oparg = NEXTARG(); \
case op:
#define DISPATCH() \
{ \
if (!_Py_atomic_load_relaxed(&eval_breaker)) { \
FAST_DISPATCH(); \
} \
continue; \
}
#ifdef LLTRACE
#define FAST_DISPATCH() \
{ \
if (!lltrace && !_Py_TracingPossible) { \
f->f_lasti = INSTR_OFFSET(); \
goto *opcode_targets[*next_instr++]; \
} \
goto fast_next_opcode; \
}
#else
#define FAST_DISPATCH() \
{ \
if (!_Py_TracingPossible) { \
f->f_lasti = INSTR_OFFSET(); \
goto *opcode_targets[*next_instr++]; \
} \
goto fast_next_opcode; \
}
#endif
#else
#define TARGET(op) \
case op:
#define TARGET_WITH_IMPL(op, impl) \
/* silence compiler warnings about `impl` unused */ \
if (0) goto impl; \
case op:
#define DISPATCH() continue
#define FAST_DISPATCH() goto fast_next_opcode
#endif
/* Tuple access macros */
#ifndef Py_DEBUG
#define GETITEM(v, i) PyTuple_GET_ITEM((PyTupleObject *)(v), (i))
#else
#define GETITEM(v, i) PyTuple_GetItem((v), (i))
#endif
#ifdef WITH_TSC
/* Use Pentium timestamp counter to mark certain events:
inst0 -- beginning of switch statement for opcode dispatch
inst1 -- end of switch statement (may be skipped)
loop0 -- the top of the mainloop
loop1 -- place where control returns again to top of mainloop
(may be skipped)
intr1 -- beginning of long interruption
intr2 -- end of long interruption
Many opcodes call out to helper C functions. In some cases, the
time in those functions should be counted towards the time for the
opcode, but not in all cases. For example, a CALL_FUNCTION opcode
calls another Python function; there's no point in charge all the
bytecode executed by the called function to the caller.
It's hard to make a useful judgement statically. In the presence
of operator overloading, it's impossible to tell if a call will
execute new Python code or not.
It's a case-by-case judgement. I'll use intr1 for the following
cases:
IMPORT_STAR
IMPORT_FROM
CALL_FUNCTION (and friends)
*/
uint64 inst0, inst1, loop0, loop1, intr0 = 0, intr1 = 0;
int ticked = 0;
READ_TIMESTAMP(inst0);
READ_TIMESTAMP(inst1);
READ_TIMESTAMP(loop0);
READ_TIMESTAMP(loop1);
/* shut up the compiler */
opcode = 0;
#endif
/* Code access macros */
#define INSTR_OFFSET() ((int)(next_instr - first_instr))
#define NEXTOP() (*next_instr++)
#define NEXTARG() (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2])
#define PEEKARG() ((next_instr[2]<<8) + next_instr[1])
#define JUMPTO(x) (next_instr = first_instr + (x))
#define JUMPBY(x) (next_instr += (x))
/* OpCode prediction macros
Some opcodes tend to come in pairs thus making it possible to
predict the second code when the first is run. For example,
COMPARE_OP is often followed by JUMP_IF_FALSE or JUMP_IF_TRUE. And,
those opcodes are often followed by a POP_TOP.
Verifying the prediction costs a single high-speed test of a register
variable against a constant. If the pairing was good, then the
processor's own internal branch predication has a high likelihood of
success, resulting in a nearly zero-overhead transition to the
next opcode. A successful prediction saves a trip through the eval-loop
including its two unpredictable branches, the HAS_ARG test and the
switch-case. Combined with the processor's internal branch prediction,
a successful PREDICT has the effect of making the two opcodes run as if
they were a single new opcode with the bodies combined.
If collecting opcode statistics, your choices are to either keep the
predictions turned-on and interpret the results as if some opcodes
had been combined or turn-off predictions so that the opcode frequency
counter updates for both opcodes.
Opcode prediction is disabled with threaded code, since the latter allows
the CPU to record separate branch prediction information for each
opcode.
*/
#if defined(DYNAMIC_EXECUTION_PROFILE) || USE_COMPUTED_GOTOS
#define PREDICT(op) if (0) goto PRED_##op
#define PREDICTED(op) PRED_##op:
#define PREDICTED_WITH_ARG(op) PRED_##op:
#else
#define PREDICT(op) if (*next_instr == op) goto PRED_##op
#define PREDICTED(op) PRED_##op: next_instr++
#define PREDICTED_WITH_ARG(op) PRED_##op: oparg = PEEKARG(); next_instr += 3
#endif
/* Stack manipulation macros */
/* The stack can grow at most MAXINT deep, as co_nlocals and
co_stacksize are ints. */
#define STACK_LEVEL() ((int)(stack_pointer - f->f_valuestack))
#define EMPTY() (STACK_LEVEL() == 0)
#define TOP() (stack_pointer[-1])
#define SECOND() (stack_pointer[-2])
#define THIRD() (stack_pointer[-3])
#define FOURTH() (stack_pointer[-4])
#define PEEK(n) (stack_pointer[-(n)])
#define SET_TOP(v) (stack_pointer[-1] = (v))
#define SET_SECOND(v) (stack_pointer[-2] = (v))
#define SET_THIRD(v) (stack_pointer[-3] = (v))
#define SET_FOURTH(v) (stack_pointer[-4] = (v))
#define SET_VALUE(n, v) (stack_pointer[-(n)] = (v))
#define BASIC_STACKADJ(n) (stack_pointer += n)
#define BASIC_PUSH(v) (*stack_pointer++ = (v))
#define BASIC_POP() (*--stack_pointer)
#ifdef LLTRACE
#define PUSH(v) { (void)(BASIC_PUSH(v), \
lltrace && prtrace(TOP(), "push")); \
assert(STACK_LEVEL() <= co->co_stacksize); }
#define POP() ((void)(lltrace && prtrace(TOP(), "pop")), \
BASIC_POP())
#define STACKADJ(n) { (void)(BASIC_STACKADJ(n), \
lltrace && prtrace(TOP(), "stackadj")); \
assert(STACK_LEVEL() <= co->co_stacksize); }
#define EXT_POP(STACK_POINTER) ((void)(lltrace && \
prtrace((STACK_POINTER)[-1], "ext_pop")), \
*--(STACK_POINTER))
#else
#define PUSH(v) BASIC_PUSH(v)
#define POP() BASIC_POP()
#define STACKADJ(n) BASIC_STACKADJ(n)
#define EXT_POP(STACK_POINTER) (*--(STACK_POINTER))
#endif
/* Local variable macros */
#define GETLOCAL(i) (fastlocals[i])
/* The SETLOCAL() macro must not DECREF the local variable in-place and
then store the new value; it must copy the old value to a temporary
value, then store the new value, and then DECREF the temporary value.
This is because it is possible that during the DECREF the frame is
accessed by other code (e.g. a __del__ method or gc.collect()) and the
variable would be pointing to already-freed memory. */
#define SETLOCAL(i, value) do { PyObject *tmp = GETLOCAL(i); \
GETLOCAL(i) = value; \
Py_XDECREF(tmp); } while (0)
#define UNWIND_BLOCK(b) \
while (STACK_LEVEL() > (b)->b_level) { \
PyObject *v = POP(); \
Py_XDECREF(v); \
}
#define UNWIND_EXCEPT_HANDLER(b) \
{ \
PyObject *type, *value, *traceback; \
assert(STACK_LEVEL() >= (b)->b_level + 3); \
while (STACK_LEVEL() > (b)->b_level + 3) { \
value = POP(); \
Py_XDECREF(value); \
} \
type = tstate->exc_type; \
value = tstate->exc_value; \
traceback = tstate->exc_traceback; \
tstate->exc_type = POP(); \
tstate->exc_value = POP(); \
tstate->exc_traceback = POP(); \
Py_XDECREF(type); \
Py_XDECREF(value); \
Py_XDECREF(traceback); \
}
#define SAVE_EXC_STATE() \
{ \
PyObject *type, *value, *traceback; \
Py_XINCREF(tstate->exc_type); \
Py_XINCREF(tstate->exc_value); \
Py_XINCREF(tstate->exc_traceback); \
type = f->f_exc_type; \
value = f->f_exc_value; \
traceback = f->f_exc_traceback; \
f->f_exc_type = tstate->exc_type; \
f->f_exc_value = tstate->exc_value; \
f->f_exc_traceback = tstate->exc_traceback; \
Py_XDECREF(type); \
Py_XDECREF(value); \
Py_XDECREF(traceback); \
}
#define SWAP_EXC_STATE() \
{ \
PyObject *tmp; \
tmp = tstate->exc_type; \
tstate->exc_type = f->f_exc_type; \
f->f_exc_type = tmp; \
tmp = tstate->exc_value; \
tstate->exc_value = f->f_exc_value; \
f->f_exc_value = tmp; \
tmp = tstate->exc_traceback; \
tstate->exc_traceback = f->f_exc_traceback; \
f->f_exc_traceback = tmp; \
}
/* Start of code */
if (f == NULL)
return NULL;
/* push frame */
if (Py_EnterRecursiveCall(""))
return NULL;
tstate->frame = f;
if (tstate->use_tracing) {
if (tstate->c_tracefunc != NULL) {
/* tstate->c_tracefunc, if defined, is a
function that will be called on *every* entry
to a code block. Its return value, if not
None, is a function that will be called at
the start of each executed line of code.
(Actually, the function must return itself
in order to continue tracing.) The trace
functions are called with three arguments:
a pointer to the current frame, a string
indicating why the function is called, and
an argument which depends on the situation.
The global trace function is also called
whenever an exception is detected. */
if (call_trace_protected(tstate->c_tracefunc,
tstate->c_traceobj,
f, PyTrace_CALL, Py_None)) {
/* Trace function raised an error */
goto exit_eval_frame;
}
}
if (tstate->c_profilefunc != NULL) {
/* Similar for c_profilefunc, except it needn't
return itself and isn't called for "line" events */
if (call_trace_protected(tstate->c_profilefunc,
tstate->c_profileobj,
f, PyTrace_CALL, Py_None)) {
/* Profile function raised an error */
goto exit_eval_frame;
}
}
}
co = f->f_code;
names = co->co_names;
consts = co->co_consts;
fastlocals = f->f_localsplus;
freevars = f->f_localsplus + co->co_nlocals;
first_instr = (unsigned char*) PyBytes_AS_STRING(co->co_code);
/* An explanation is in order for the next line.
f->f_lasti now refers to the index of the last instruction
executed. You might think this was obvious from the name, but
this wasn't always true before 2.3! PyFrame_New now sets
f->f_lasti to -1 (i.e. the index *before* the first instruction)
and YIELD_VALUE doesn't fiddle with f_lasti any more. So this
does work. Promise.
When the PREDICT() macros are enabled, some opcode pairs follow in
direct succession without updating f->f_lasti. A successful
prediction effectively links the two codes together as if they
were a single new opcode; accordingly,f->f_lasti will point to
the first code in the pair (for instance, GET_ITER followed by
FOR_ITER is effectively a single opcode and f->f_lasti will point
at to the beginning of the combined pair.)
*/
next_instr = first_instr + f->f_lasti + 1;
stack_pointer = f->f_stacktop;
assert(stack_pointer != NULL);
f->f_stacktop = NULL; /* remains NULL unless yield suspends frame */
if (co->co_flags & CO_GENERATOR && !throwflag) {
if (f->f_exc_type != NULL && f->f_exc_type != Py_None) {
/* We were in an except handler when we left,
restore the exception state which was put aside
(see YIELD_VALUE). */
SWAP_EXC_STATE();
}
else {
SAVE_EXC_STATE();
}
}
#ifdef LLTRACE
lltrace = PyDict_GetItemString(f->f_globals, "__lltrace__") != NULL;
#endif
#if defined(Py_DEBUG) || defined(LLTRACE)
{
PyObject *error_type, *error_value, *error_traceback;
PyErr_Fetch(&error_type, &error_value, &error_traceback);
filename = _PyUnicode_AsString(co->co_filename);
if (filename == NULL && tstate->overflowed) {
/* maximum recursion depth exceeded */
goto exit_eval_frame;
}
PyErr_Restore(error_type, error_value, error_traceback);
}
#endif
why = WHY_NOT;
err = 0;
x = Py_None; /* Not a reference, just anything non-NULL */
w = NULL;
if (throwflag) { /* support for generator.throw() */
why = WHY_EXCEPTION;
goto on_error;
}
for (;;) {
#ifdef WITH_TSC
if (inst1 == 0) {
/* Almost surely, the opcode executed a break
or a continue, preventing inst1 from being set
on the way out of the loop.
*/
READ_TIMESTAMP(inst1);
loop1 = inst1;
}
dump_tsc(opcode, ticked, inst0, inst1, loop0, loop1,
intr0, intr1);
ticked = 0;
inst1 = 0;
intr0 = 0;
intr1 = 0;
READ_TIMESTAMP(loop0);
#endif
assert(stack_pointer >= f->f_valuestack); /* else underflow */
assert(STACK_LEVEL() <= co->co_stacksize); /* else overflow */
/* Do periodic things. Doing this every time through
the loop would add too much overhead, so we do it
only every Nth instruction. We also do it if
``pendingcalls_to_do'' is set, i.e. when an asynchronous
event needs attention (e.g. a signal handler or
async I/O handler); see Py_AddPendingCall() and
Py_MakePendingCalls() above. */
if (_Py_atomic_load_relaxed(&eval_breaker)) {
if (*next_instr == SETUP_FINALLY) {
/* Make the last opcode before
a try: finally: block uninterruptible. */
goto fast_next_opcode;
}
tstate->tick_counter++;
#ifdef WITH_TSC
ticked = 1;
#endif
if (_Py_atomic_load_relaxed(&pendingcalls_to_do)) {
if (Py_MakePendingCalls() < 0) {
why = WHY_EXCEPTION;
goto on_error;
}
}
#ifdef WITH_THREAD
if (_Py_atomic_load_relaxed(&gil_drop_request)) {
/* Give another thread a chance */
if (PyThreadState_Swap(NULL) != tstate)
Py_FatalError("ceval: tstate mix-up");
drop_gil(tstate);
/* Other threads may run now */
take_gil(tstate);
if (PyThreadState_Swap(tstate) != NULL)
Py_FatalError("ceval: orphan tstate");
}
#endif
/* Check for asynchronous exceptions. */
if (tstate->async_exc != NULL) {
x = tstate->async_exc;
tstate->async_exc = NULL;
UNSIGNAL_ASYNC_EXC();
PyErr_SetNone(x);
Py_DECREF(x);
why = WHY_EXCEPTION;
goto on_error;
}
}
fast_next_opcode:
f->f_lasti = INSTR_OFFSET();
/* line-by-line tracing support */
if (_Py_TracingPossible &&
tstate->c_tracefunc != NULL && !tstate->tracing) {
/* see maybe_call_line_trace
for expository comments */
f->f_stacktop = stack_pointer;
err = maybe_call_line_trace(tstate->c_tracefunc,
tstate->c_traceobj,
f, &instr_lb, &instr_ub,
&instr_prev);
/* Reload possibly changed frame fields */
JUMPTO(f->f_lasti);
if (f->f_stacktop != NULL) {
stack_pointer = f->f_stacktop;
f->f_stacktop = NULL;
}
if (err) {
/* trace function raised an exception */
goto on_error;
}
}
/* Extract opcode and argument */
opcode = NEXTOP();
oparg = 0; /* allows oparg to be stored in a register because
it doesn't have to be remembered across a full loop */
if (HAS_ARG(opcode))
oparg = NEXTARG();
dispatch_opcode:
#ifdef DYNAMIC_EXECUTION_PROFILE
#ifdef DXPAIRS
dxpairs[lastopcode][opcode]++;
lastopcode = opcode;
#endif
dxp[opcode]++;
#endif
#ifdef LLTRACE
/* Instruction tracing */
if (lltrace) {
if (HAS_ARG(opcode)) {
printf("%d: %d, %d\n",
f->f_lasti, opcode, oparg);
}
else {
printf("%d: %d\n",
f->f_lasti, opcode);
}
}
#endif
/* Main switch on opcode */
READ_TIMESTAMP(inst0);
switch (opcode) {
/* BEWARE!
It is essential that any operation that fails sets either
x to NULL, err to nonzero, or why to anything but WHY_NOT,
and that no operation that succeeds does this! */
/* case STOP_CODE: this is an error! */
TARGET(NOP)
FAST_DISPATCH();
TARGET(LOAD_FAST)
x = GETLOCAL(oparg);
if (x != NULL) {
Py_INCREF(x);
PUSH(x);
FAST_DISPATCH();
}
format_exc_check_arg(PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
PyTuple_GetItem(co->co_varnames, oparg));
break;
TARGET(LOAD_CONST)
x = GETITEM(consts, oparg);
Py_INCREF(x);
PUSH(x);
FAST_DISPATCH();
PREDICTED_WITH_ARG(STORE_FAST);
TARGET(STORE_FAST)
v = POP();
SETLOCAL(oparg, v);
FAST_DISPATCH();
TARGET(POP_TOP)
v = POP();
Py_DECREF(v);
FAST_DISPATCH();
TARGET(ROT_TWO)
v = TOP();
w = SECOND();
SET_TOP(w);
SET_SECOND(v);
FAST_DISPATCH();
TARGET(ROT_THREE)
v = TOP();
w = SECOND();
x = THIRD();
SET_TOP(w);
SET_SECOND(x);
SET_THIRD(v);
FAST_DISPATCH();
TARGET(DUP_TOP)
v = TOP();
Py_INCREF(v);
PUSH(v);
FAST_DISPATCH();
TARGET(DUP_TOP_TWO)
x = TOP();
Py_INCREF(x);
w = SECOND();
Py_INCREF(w);
STACKADJ(2);
SET_TOP(x);
SET_SECOND(w);
FAST_DISPATCH();
TARGET(UNARY_POSITIVE)
v = TOP();
x = PyNumber_Positive(v);
Py_DECREF(v);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(UNARY_NEGATIVE)
v = TOP();
x = PyNumber_Negative(v);
Py_DECREF(v);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(UNARY_NOT)
v = TOP();
err = PyObject_IsTrue(v);
Py_DECREF(v);
if (err == 0) {
Py_INCREF(Py_True);
SET_TOP(Py_True);
DISPATCH();
}
else if (err > 0) {
Py_INCREF(Py_False);
SET_TOP(Py_False);
err = 0;
DISPATCH();
}
STACKADJ(-1);
break;
TARGET(UNARY_INVERT)
v = TOP();
x = PyNumber_Invert(v);
Py_DECREF(v);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_POWER)
w = POP();
v = TOP();
x = PyNumber_Power(v, w, Py_None);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_MULTIPLY)
w = POP();
v = TOP();
x = PyNumber_Multiply(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_TRUE_DIVIDE)
w = POP();
v = TOP();
x = PyNumber_TrueDivide(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_FLOOR_DIVIDE)
w = POP();
v = TOP();
x = PyNumber_FloorDivide(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_MODULO)
w = POP();
v = TOP();
if (PyUnicode_CheckExact(v))
x = PyUnicode_Format(v, w);
else
x = PyNumber_Remainder(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_ADD)
w = POP();
v = TOP();
if (PyUnicode_CheckExact(v) &&
PyUnicode_CheckExact(w)) {
x = unicode_concatenate(v, w, f, next_instr);
/* unicode_concatenate consumed the ref to v */
goto skip_decref_vx;
}
else {
x = PyNumber_Add(v, w);
}
Py_DECREF(v);
skip_decref_vx:
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_SUBTRACT)
w = POP();
v = TOP();
x = PyNumber_Subtract(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_SUBSCR)
w = POP();
v = TOP();
x = PyObject_GetItem(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_LSHIFT)
w = POP();
v = TOP();
x = PyNumber_Lshift(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_RSHIFT)
w = POP();
v = TOP();
x = PyNumber_Rshift(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_AND)
w = POP();
v = TOP();
x = PyNumber_And(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_XOR)
w = POP();
v = TOP();
x = PyNumber_Xor(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(BINARY_OR)
w = POP();
v = TOP();
x = PyNumber_Or(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(LIST_APPEND)
w = POP();
v = PEEK(oparg);
err = PyList_Append(v, w);
Py_DECREF(w);
if (err == 0) {
PREDICT(JUMP_ABSOLUTE);
DISPATCH();
}
break;
TARGET(SET_ADD)
w = POP();
v = stack_pointer[-oparg];
err = PySet_Add(v, w);
Py_DECREF(w);
if (err == 0) {
PREDICT(JUMP_ABSOLUTE);
DISPATCH();
}
break;
TARGET(INPLACE_POWER)
w = POP();
v = TOP();
x = PyNumber_InPlacePower(v, w, Py_None);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_MULTIPLY)
w = POP();
v = TOP();
x = PyNumber_InPlaceMultiply(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_TRUE_DIVIDE)
w = POP();
v = TOP();
x = PyNumber_InPlaceTrueDivide(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_FLOOR_DIVIDE)
w = POP();
v = TOP();
x = PyNumber_InPlaceFloorDivide(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_MODULO)
w = POP();
v = TOP();
x = PyNumber_InPlaceRemainder(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_ADD)
w = POP();
v = TOP();
if (PyUnicode_CheckExact(v) &&
PyUnicode_CheckExact(w)) {
x = unicode_concatenate(v, w, f, next_instr);
/* unicode_concatenate consumed the ref to v */
goto skip_decref_v;
}
else {
x = PyNumber_InPlaceAdd(v, w);
}
Py_DECREF(v);
skip_decref_v:
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_SUBTRACT)
w = POP();
v = TOP();
x = PyNumber_InPlaceSubtract(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_LSHIFT)
w = POP();
v = TOP();
x = PyNumber_InPlaceLshift(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_RSHIFT)
w = POP();
v = TOP();
x = PyNumber_InPlaceRshift(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_AND)
w = POP();
v = TOP();
x = PyNumber_InPlaceAnd(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_XOR)
w = POP();
v = TOP();
x = PyNumber_InPlaceXor(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(INPLACE_OR)
w = POP();
v = TOP();
x = PyNumber_InPlaceOr(v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(STORE_SUBSCR)
w = TOP();
v = SECOND();
u = THIRD();
STACKADJ(-3);
/* v[w] = u */
err = PyObject_SetItem(v, w, u);
Py_DECREF(u);
Py_DECREF(v);
Py_DECREF(w);
if (err == 0) DISPATCH();
break;
TARGET(DELETE_SUBSCR)
w = TOP();
v = SECOND();
STACKADJ(-2);
/* del v[w] */
err = PyObject_DelItem(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (err == 0) DISPATCH();
break;
TARGET(PRINT_EXPR)
v = POP();
w = PySys_GetObject("displayhook");
if (w == NULL) {
PyErr_SetString(PyExc_RuntimeError,
"lost sys.displayhook");
err = -1;
x = NULL;
}
if (err == 0) {
x = PyTuple_Pack(1, v);
if (x == NULL)
err = -1;
}
if (err == 0) {
w = PyEval_CallObject(w, x);
Py_XDECREF(w);
if (w == NULL)
err = -1;
}
Py_DECREF(v);
Py_XDECREF(x);
break;
#ifdef CASE_TOO_BIG
default: switch (opcode) {
#endif
TARGET(RAISE_VARARGS)
v = w = NULL;
switch (oparg) {
case 2:
v = POP(); /* cause */
case 1:
w = POP(); /* exc */
case 0: /* Fallthrough */
why = do_raise(w, v);
break;
default:
PyErr_SetString(PyExc_SystemError,
"bad RAISE_VARARGS oparg");
why = WHY_EXCEPTION;
break;
}
break;
TARGET(STORE_LOCALS)
x = POP();
v = f->f_locals;
Py_XDECREF(v);
f->f_locals = x;
DISPATCH();
TARGET(RETURN_VALUE)
retval = POP();
why = WHY_RETURN;
goto fast_block_end;
TARGET(YIELD_VALUE)
retval = POP();
f->f_stacktop = stack_pointer;
why = WHY_YIELD;
/* Put aside the current exception state and restore
that of the calling frame. This only serves when
"yield" is used inside an except handler. */
SWAP_EXC_STATE();
goto fast_yield;
TARGET(POP_EXCEPT)
{
PyTryBlock *b = PyFrame_BlockPop(f);
if (b->b_type != EXCEPT_HANDLER) {
PyErr_SetString(PyExc_SystemError,
"popped block is not an except handler");
why = WHY_EXCEPTION;
break;
}
UNWIND_EXCEPT_HANDLER(b);
}
DISPATCH();
TARGET(POP_BLOCK)
{
PyTryBlock *b = PyFrame_BlockPop(f);
UNWIND_BLOCK(b);
}
DISPATCH();
PREDICTED(END_FINALLY);
TARGET(END_FINALLY)
v = POP();
if (PyLong_Check(v)) {
why = (enum why_code) PyLong_AS_LONG(v);
assert(why != WHY_YIELD);
if (why == WHY_RETURN ||
why == WHY_CONTINUE)
retval = POP();
if (why == WHY_SILENCED) {
/* An exception was silenced by 'with', we must
manually unwind the EXCEPT_HANDLER block which was
created when the exception was caught, otherwise
the stack will be in an inconsistent state. */
PyTryBlock *b = PyFrame_BlockPop(f);
assert(b->b_type == EXCEPT_HANDLER);
UNWIND_EXCEPT_HANDLER(b);
why = WHY_NOT;
}
}
else if (PyExceptionClass_Check(v)) {
w = POP();
u = POP();
PyErr_Restore(v, w, u);
why = WHY_RERAISE;
break;
}
else if (v != Py_None) {
PyErr_SetString(PyExc_SystemError,
"'finally' pops bad exception");
why = WHY_EXCEPTION;
}
Py_DECREF(v);
break;
TARGET(LOAD_BUILD_CLASS)
x = PyDict_GetItemString(f->f_builtins,
"__build_class__");
if (x == NULL) {
PyErr_SetString(PyExc_ImportError,
"__build_class__ not found");
break;
}
Py_INCREF(x);
PUSH(x);
break;
TARGET(STORE_NAME)
w = GETITEM(names, oparg);
v = POP();
if ((x = f->f_locals) != NULL) {
if (PyDict_CheckExact(x))
err = PyDict_SetItem(x, w, v);
else
err = PyObject_SetItem(x, w, v);
Py_DECREF(v);
if (err == 0) DISPATCH();
break;
}
PyErr_Format(PyExc_SystemError,
"no locals found when storing %R", w);
break;
TARGET(DELETE_NAME)
w = GETITEM(names, oparg);
if ((x = f->f_locals) != NULL) {
if ((err = PyObject_DelItem(x, w)) != 0)
format_exc_check_arg(PyExc_NameError,
NAME_ERROR_MSG,
w);
break;
}
PyErr_Format(PyExc_SystemError,
"no locals when deleting %R", w);
break;
PREDICTED_WITH_ARG(UNPACK_SEQUENCE);
TARGET(UNPACK_SEQUENCE)
v = POP();
if (PyTuple_CheckExact(v) &&
PyTuple_GET_SIZE(v) == oparg) {
PyObject **items = \
((PyTupleObject *)v)->ob_item;
while (oparg--) {
w = items[oparg];
Py_INCREF(w);
PUSH(w);
}
Py_DECREF(v);
DISPATCH();
} else if (PyList_CheckExact(v) &&
PyList_GET_SIZE(v) == oparg) {
PyObject **items = \
((PyListObject *)v)->ob_item;
while (oparg--) {
w = items[oparg];
Py_INCREF(w);
PUSH(w);
}
} else if (unpack_iterable(v, oparg, -1,
stack_pointer + oparg)) {
STACKADJ(oparg);
} else {
/* unpack_iterable() raised an exception */
why = WHY_EXCEPTION;
}
Py_DECREF(v);
break;
TARGET(UNPACK_EX)
{
int totalargs = 1 + (oparg & 0xFF) + (oparg >> 8);
v = POP();
if (unpack_iterable(v, oparg & 0xFF, oparg >> 8,
stack_pointer + totalargs)) {
stack_pointer += totalargs;
} else {
why = WHY_EXCEPTION;
}
Py_DECREF(v);
break;
}
TARGET(STORE_ATTR)
w = GETITEM(names, oparg);
v = TOP();
u = SECOND();
STACKADJ(-2);
err = PyObject_SetAttr(v, w, u); /* v.w = u */
Py_DECREF(v);
Py_DECREF(u);
if (err == 0) DISPATCH();
break;
TARGET(DELETE_ATTR)
w = GETITEM(names, oparg);
v = POP();
err = PyObject_SetAttr(v, w, (PyObject *)NULL);
/* del v.w */
Py_DECREF(v);
break;
TARGET(STORE_GLOBAL)
w = GETITEM(names, oparg);
v = POP();
err = PyDict_SetItem(f->f_globals, w, v);
Py_DECREF(v);
if (err == 0) DISPATCH();
break;
TARGET(DELETE_GLOBAL)
w = GETITEM(names, oparg);
if ((err = PyDict_DelItem(f->f_globals, w)) != 0)
format_exc_check_arg(
PyExc_NameError, GLOBAL_NAME_ERROR_MSG, w);
break;
TARGET(LOAD_NAME)
w = GETITEM(names, oparg);
if ((v = f->f_locals) == NULL) {
PyErr_Format(PyExc_SystemError,
"no locals when loading %R", w);
why = WHY_EXCEPTION;
break;
}
if (PyDict_CheckExact(v)) {
x = PyDict_GetItem(v, w);
Py_XINCREF(x);
}
else {
x = PyObject_GetItem(v, w);
if (x == NULL && PyErr_Occurred()) {
if (!PyErr_ExceptionMatches(
PyExc_KeyError))
break;
PyErr_Clear();
}
}
if (x == NULL) {
x = PyDict_GetItem(f->f_globals, w);
if (x == NULL) {
x = PyDict_GetItem(f->f_builtins, w);
if (x == NULL) {
format_exc_check_arg(
PyExc_NameError,
NAME_ERROR_MSG, w);
break;
}
}
Py_INCREF(x);
}
PUSH(x);
DISPATCH();
TARGET(LOAD_GLOBAL)
w = GETITEM(names, oparg);
if (PyUnicode_CheckExact(w)) {
/* Inline the PyDict_GetItem() calls.
WARNING: this is an extreme speed hack.
Do not try this at home. */
Py_hash_t hash = ((PyUnicodeObject *)w)->hash;
if (hash != -1) {
PyDictObject *d;
PyDictEntry *e;
d = (PyDictObject *)(f->f_globals);
e = d->ma_lookup(d, w, hash);
if (e == NULL) {
x = NULL;
break;
}
x = e->me_value;
if (x != NULL) {
Py_INCREF(x);
PUSH(x);
DISPATCH();
}
d = (PyDictObject *)(f->f_builtins);
e = d->ma_lookup(d, w, hash);
if (e == NULL) {
x = NULL;
break;
}
x = e->me_value;
if (x != NULL) {
Py_INCREF(x);
PUSH(x);
DISPATCH();
}
goto load_global_error;
}
}
/* This is the un-inlined version of the code above */
x = PyDict_GetItem(f->f_globals, w);
if (x == NULL) {
x = PyDict_GetItem(f->f_builtins, w);
if (x == NULL) {
load_global_error:
format_exc_check_arg(
PyExc_NameError,
GLOBAL_NAME_ERROR_MSG, w);
break;
}
}
Py_INCREF(x);
PUSH(x);
DISPATCH();
TARGET(DELETE_FAST)
x = GETLOCAL(oparg);
if (x != NULL) {
SETLOCAL(oparg, NULL);
DISPATCH();
}
format_exc_check_arg(
PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
PyTuple_GetItem(co->co_varnames, oparg)
);
break;
TARGET(DELETE_DEREF)
x = freevars[oparg];
if (PyCell_GET(x) != NULL) {
PyCell_Set(x, NULL);
DISPATCH();
}
err = -1;
format_exc_unbound(co, oparg);
break;
TARGET(LOAD_CLOSURE)
x = freevars[oparg];
Py_INCREF(x);
PUSH(x);
if (x != NULL) DISPATCH();
break;
TARGET(LOAD_DEREF)
x = freevars[oparg];
w = PyCell_Get(x);
if (w != NULL) {
PUSH(w);
DISPATCH();
}
err = -1;
format_exc_unbound(co, oparg);
break;
TARGET(STORE_DEREF)
w = POP();
x = freevars[oparg];
PyCell_Set(x, w);
Py_DECREF(w);
DISPATCH();
TARGET(BUILD_TUPLE)
x = PyTuple_New(oparg);
if (x != NULL) {
for (; --oparg >= 0;) {
w = POP();
PyTuple_SET_ITEM(x, oparg, w);
}
PUSH(x);
DISPATCH();
}
break;
TARGET(BUILD_LIST)
x = PyList_New(oparg);
if (x != NULL) {
for (; --oparg >= 0;) {
w = POP();
PyList_SET_ITEM(x, oparg, w);
}
PUSH(x);
DISPATCH();
}
break;
TARGET(BUILD_SET)
x = PySet_New(NULL);
if (x != NULL) {
for (; --oparg >= 0;) {
w = POP();
if (err == 0)
err = PySet_Add(x, w);
Py_DECREF(w);
}
if (err != 0) {
Py_DECREF(x);
break;
}
PUSH(x);
DISPATCH();
}
break;
TARGET(BUILD_MAP)
x = _PyDict_NewPresized((Py_ssize_t)oparg);
PUSH(x);
if (x != NULL) DISPATCH();
break;
TARGET(STORE_MAP)
w = TOP(); /* key */
u = SECOND(); /* value */
v = THIRD(); /* dict */
STACKADJ(-2);
assert (PyDict_CheckExact(v));
err = PyDict_SetItem(v, w, u); /* v[w] = u */
Py_DECREF(u);
Py_DECREF(w);
if (err == 0) DISPATCH();
break;
TARGET(MAP_ADD)
w = TOP(); /* key */
u = SECOND(); /* value */
STACKADJ(-2);
v = stack_pointer[-oparg]; /* dict */
assert (PyDict_CheckExact(v));
err = PyDict_SetItem(v, w, u); /* v[w] = u */
Py_DECREF(u);
Py_DECREF(w);
if (err == 0) {
PREDICT(JUMP_ABSOLUTE);
DISPATCH();
}
break;
TARGET(LOAD_ATTR)
w = GETITEM(names, oparg);
v = TOP();
x = PyObject_GetAttr(v, w);
Py_DECREF(v);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(COMPARE_OP)
w = POP();
v = TOP();
x = cmp_outcome(oparg, v, w);
Py_DECREF(v);
Py_DECREF(w);
SET_TOP(x);
if (x == NULL) break;
PREDICT(POP_JUMP_IF_FALSE);
PREDICT(POP_JUMP_IF_TRUE);
DISPATCH();
TARGET(IMPORT_NAME)
w = GETITEM(names, oparg);
x = PyDict_GetItemString(f->f_builtins, "__import__");
if (x == NULL) {
PyErr_SetString(PyExc_ImportError,
"__import__ not found");
break;
}
Py_INCREF(x);
v = POP();
u = TOP();
if (PyLong_AsLong(u) != -1 || PyErr_Occurred())
w = PyTuple_Pack(5,
w,
f->f_globals,
f->f_locals == NULL ?
Py_None : f->f_locals,
v,
u);
else
w = PyTuple_Pack(4,
w,
f->f_globals,
f->f_locals == NULL ?
Py_None : f->f_locals,
v);
Py_DECREF(v);
Py_DECREF(u);
if (w == NULL) {
u = POP();
Py_DECREF(x);
x = NULL;
break;
}
READ_TIMESTAMP(intr0);
v = x;
x = PyEval_CallObject(v, w);
Py_DECREF(v);
READ_TIMESTAMP(intr1);
Py_DECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(IMPORT_STAR)
v = POP();
PyFrame_FastToLocals(f);
if ((x = f->f_locals) == NULL) {
PyErr_SetString(PyExc_SystemError,
"no locals found during 'import *'");
break;
}
READ_TIMESTAMP(intr0);
err = import_all_from(x, v);
READ_TIMESTAMP(intr1);
PyFrame_LocalsToFast(f, 0);
Py_DECREF(v);
if (err == 0) DISPATCH();
break;
TARGET(IMPORT_FROM)
w = GETITEM(names, oparg);
v = TOP();
READ_TIMESTAMP(intr0);
x = import_from(v, w);
READ_TIMESTAMP(intr1);
PUSH(x);
if (x != NULL) DISPATCH();
break;
TARGET(JUMP_FORWARD)
JUMPBY(oparg);
FAST_DISPATCH();
PREDICTED_WITH_ARG(POP_JUMP_IF_FALSE);
TARGET(POP_JUMP_IF_FALSE)
w = POP();
if (w == Py_True) {
Py_DECREF(w);
FAST_DISPATCH();
}
if (w == Py_False) {
Py_DECREF(w);
JUMPTO(oparg);
FAST_DISPATCH();
}
err = PyObject_IsTrue(w);
Py_DECREF(w);
if (err > 0)
err = 0;
else if (err == 0)
JUMPTO(oparg);
else
break;
DISPATCH();
PREDICTED_WITH_ARG(POP_JUMP_IF_TRUE);
TARGET(POP_JUMP_IF_TRUE)
w = POP();
if (w == Py_False) {
Py_DECREF(w);
FAST_DISPATCH();
}
if (w == Py_True) {
Py_DECREF(w);
JUMPTO(oparg);
FAST_DISPATCH();
}
err = PyObject_IsTrue(w);
Py_DECREF(w);
if (err > 0) {
err = 0;
JUMPTO(oparg);
}
else if (err == 0)
;
else
break;
DISPATCH();
TARGET(JUMP_IF_FALSE_OR_POP)
w = TOP();
if (w == Py_True) {
STACKADJ(-1);
Py_DECREF(w);
FAST_DISPATCH();
}
if (w == Py_False) {
JUMPTO(oparg);
FAST_DISPATCH();
}
err = PyObject_IsTrue(w);
if (err > 0) {
STACKADJ(-1);
Py_DECREF(w);
err = 0;
}
else if (err == 0)
JUMPTO(oparg);
else
break;
DISPATCH();
TARGET(JUMP_IF_TRUE_OR_POP)
w = TOP();
if (w == Py_False) {
STACKADJ(-1);
Py_DECREF(w);
FAST_DISPATCH();
}
if (w == Py_True) {
JUMPTO(oparg);
FAST_DISPATCH();
}
err = PyObject_IsTrue(w);
if (err > 0) {
err = 0;
JUMPTO(oparg);
}
else if (err == 0) {
STACKADJ(-1);
Py_DECREF(w);
}
else
break;
DISPATCH();
PREDICTED_WITH_ARG(JUMP_ABSOLUTE);
TARGET(JUMP_ABSOLUTE)
JUMPTO(oparg);
#if FAST_LOOPS
/* Enabling this path speeds-up all while and for-loops by bypassing
the per-loop checks for signals. By default, this should be turned-off
because it prevents detection of a control-break in tight loops like
"while 1: pass". Compile with this option turned-on when you need
the speed-up and do not need break checking inside tight loops (ones
that contain only instructions ending with FAST_DISPATCH).
*/
FAST_DISPATCH();
#else
DISPATCH();
#endif
TARGET(GET_ITER)
/* before: [obj]; after [getiter(obj)] */
v = TOP();
x = PyObject_GetIter(v);
Py_DECREF(v);
if (x != NULL) {
SET_TOP(x);
PREDICT(FOR_ITER);
DISPATCH();
}
STACKADJ(-1);
break;
PREDICTED_WITH_ARG(FOR_ITER);
TARGET(FOR_ITER)
/* before: [iter]; after: [iter, iter()] *or* [] */
v = TOP();
x = (*v->ob_type->tp_iternext)(v);
if (x != NULL) {
PUSH(x);
PREDICT(STORE_FAST);
PREDICT(UNPACK_SEQUENCE);
DISPATCH();
}
if (PyErr_Occurred()) {
if (!PyErr_ExceptionMatches(
PyExc_StopIteration))
break;
PyErr_Clear();
}
/* iterator ended normally */
x = v = POP();
Py_DECREF(v);
JUMPBY(oparg);
DISPATCH();
TARGET(BREAK_LOOP)
why = WHY_BREAK;
goto fast_block_end;
TARGET(CONTINUE_LOOP)
retval = PyLong_FromLong(oparg);
if (!retval) {
x = NULL;
break;
}
why = WHY_CONTINUE;
goto fast_block_end;
TARGET_WITH_IMPL(SETUP_LOOP, _setup_finally)
TARGET_WITH_IMPL(SETUP_EXCEPT, _setup_finally)
TARGET(SETUP_FINALLY)
_setup_finally:
/* NOTE: If you add any new block-setup opcodes that
are not try/except/finally handlers, you may need
to update the PyGen_NeedsFinalizing() function.
*/
PyFrame_BlockSetup(f, opcode, INSTR_OFFSET() + oparg,
STACK_LEVEL());
DISPATCH();
TARGET(SETUP_WITH)
{
static PyObject *exit, *enter;
w = TOP();
x = special_lookup(w, "__exit__", &exit);
if (!x)
break;
SET_TOP(x);
u = special_lookup(w, "__enter__", &enter);
Py_DECREF(w);
if (!u) {
x = NULL;
break;
}
x = PyObject_CallFunctionObjArgs(u, NULL);
Py_DECREF(u);
if (!x)
break;
/* Setup the finally block before pushing the result
of __enter__ on the stack. */
PyFrame_BlockSetup(f, SETUP_FINALLY, INSTR_OFFSET() + oparg,
STACK_LEVEL());
PUSH(x);
DISPATCH();
}
TARGET(WITH_CLEANUP)
{
/* At the top of the stack are 1-3 values indicating
how/why we entered the finally clause:
- TOP = None
- (TOP, SECOND) = (WHY_{RETURN,CONTINUE}), retval
- TOP = WHY_*; no retval below it
- (TOP, SECOND, THIRD) = exc_info()
(FOURTH, FITH, SIXTH) = previous exception for EXCEPT_HANDLER
Below them is EXIT, the context.__exit__ bound method.
In the last case, we must call
EXIT(TOP, SECOND, THIRD)
otherwise we must call
EXIT(None, None, None)
In the first two cases, we remove EXIT from the
stack, leaving the rest in the same order. In the
third case, we shift the bottom 3 values of the
stack down, and replace the empty spot with NULL.
In addition, if the stack represents an exception,
*and* the function call returns a 'true' value, we
push WHY_SILENCED onto the stack. END_FINALLY will
then not re-raise the exception. (But non-local
gotos should still be resumed.)
*/
PyObject *exit_func;
u = TOP();
if (u == Py_None) {
(void)POP();
exit_func = TOP();
SET_TOP(u);
v = w = Py_None;
}
else if (PyLong_Check(u)) {
(void)POP();
switch(PyLong_AsLong(u)) {
case WHY_RETURN:
case WHY_CONTINUE:
/* Retval in TOP. */
exit_func = SECOND();
SET_SECOND(TOP());
SET_TOP(u);
break;
default:
exit_func = TOP();
SET_TOP(u);
break;
}
u = v = w = Py_None;
}
else {
PyObject *tp, *exc, *tb;
PyTryBlock *block;
v = SECOND();
w = THIRD();
tp = FOURTH();
exc = PEEK(5);
tb = PEEK(6);
exit_func = PEEK(7);
SET_VALUE(7, tb);
SET_VALUE(6, exc);
SET_VALUE(5, tp);
/* UNWIND_EXCEPT_HANDLER will pop this off. */
SET_FOURTH(NULL);
/* We just shifted the stack down, so we have
to tell the except handler block that the
values are lower than it expects. */
block = &f->f_blockstack[f->f_iblock - 1];
assert(block->b_type == EXCEPT_HANDLER);
block->b_level--;
}
/* XXX Not the fastest way to call it... */
x = PyObject_CallFunctionObjArgs(exit_func, u, v, w,
NULL);
Py_DECREF(exit_func);
if (x == NULL)
break; /* Go to error exit */
if (u != Py_None)
err = PyObject_IsTrue(x);
else
err = 0;
Py_DECREF(x);
if (err < 0)
break; /* Go to error exit */
else if (err > 0) {
err = 0;
/* There was an exception and a True return */
PUSH(PyLong_FromLong((long) WHY_SILENCED));
}
PREDICT(END_FINALLY);
break;
}
TARGET(CALL_FUNCTION)
{
PyObject **sp;
PCALL(PCALL_ALL);
sp = stack_pointer;
#ifdef WITH_TSC
x = call_function(&sp, oparg, &intr0, &intr1);
#else
x = call_function(&sp, oparg);
#endif
stack_pointer = sp;
PUSH(x);
if (x != NULL)
DISPATCH();
break;
}
TARGET_WITH_IMPL(CALL_FUNCTION_VAR, _call_function_var_kw)
TARGET_WITH_IMPL(CALL_FUNCTION_KW, _call_function_var_kw)
TARGET(CALL_FUNCTION_VAR_KW)
_call_function_var_kw:
{
int na = oparg & 0xff;
int nk = (oparg>>8) & 0xff;
int flags = (opcode - CALL_FUNCTION) & 3;
int n = na + 2 * nk;
PyObject **pfunc, *func, **sp;
PCALL(PCALL_ALL);
if (flags & CALL_FLAG_VAR)
n++;
if (flags & CALL_FLAG_KW)
n++;
pfunc = stack_pointer - n - 1;
func = *pfunc;
if (PyMethod_Check(func)
&& PyMethod_GET_SELF(func) != NULL) {
PyObject *self = PyMethod_GET_SELF(func);
Py_INCREF(self);
func = PyMethod_GET_FUNCTION(func);
Py_INCREF(func);
Py_DECREF(*pfunc);
*pfunc = self;
na++;
n++;
} else
Py_INCREF(func);
sp = stack_pointer;
READ_TIMESTAMP(intr0);
x = ext_do_call(func, &sp, flags, na, nk);
READ_TIMESTAMP(intr1);
stack_pointer = sp;
Py_DECREF(func);
while (stack_pointer > pfunc) {
w = POP();
Py_DECREF(w);
}
PUSH(x);
if (x != NULL)
DISPATCH();
break;
}
TARGET_WITH_IMPL(MAKE_CLOSURE, _make_function)
TARGET(MAKE_FUNCTION)
_make_function:
{
int posdefaults = oparg & 0xff;
int kwdefaults = (oparg>>8) & 0xff;
int num_annotations = (oparg >> 16) & 0x7fff;
v = POP(); /* code object */
x = PyFunction_New(v, f->f_globals);
Py_DECREF(v);
if (x != NULL && opcode == MAKE_CLOSURE) {
v = POP();
if (PyFunction_SetClosure(x, v) != 0) {
/* Can't happen unless bytecode is corrupt. */
why = WHY_EXCEPTION;
}
Py_DECREF(v);
}
if (x != NULL && num_annotations > 0) {
Py_ssize_t name_ix;
u = POP(); /* names of args with annotations */
v = PyDict_New();
if (v == NULL) {
Py_DECREF(x);
x = NULL;
break;
}
name_ix = PyTuple_Size(u);
assert(num_annotations == name_ix+1);
while (name_ix > 0) {
--name_ix;
t = PyTuple_GET_ITEM(u, name_ix);
w = POP();
/* XXX(nnorwitz): check for errors */
PyDict_SetItem(v, t, w);
Py_DECREF(w);
}
if (PyFunction_SetAnnotations(x, v) != 0) {
/* Can't happen unless
PyFunction_SetAnnotations changes. */
why = WHY_EXCEPTION;
}
Py_DECREF(v);
Py_DECREF(u);
}
/* XXX Maybe this should be a separate opcode? */
if (x != NULL && posdefaults > 0) {
v = PyTuple_New(posdefaults);
if (v == NULL) {
Py_DECREF(x);
x = NULL;
break;
}
while (--posdefaults >= 0) {
w = POP();
PyTuple_SET_ITEM(v, posdefaults, w);
}
if (PyFunction_SetDefaults(x, v) != 0) {
/* Can't happen unless
PyFunction_SetDefaults changes. */
why = WHY_EXCEPTION;
}
Py_DECREF(v);
}
if (x != NULL && kwdefaults > 0) {
v = PyDict_New();
if (v == NULL) {
Py_DECREF(x);
x = NULL;
break;
}
while (--kwdefaults >= 0) {
w = POP(); /* default value */
u = POP(); /* kw only arg name */
/* XXX(nnorwitz): check for errors */
PyDict_SetItem(v, u, w);
Py_DECREF(w);
Py_DECREF(u);
}
if (PyFunction_SetKwDefaults(x, v) != 0) {
/* Can't happen unless
PyFunction_SetKwDefaults changes. */
why = WHY_EXCEPTION;
}
Py_DECREF(v);
}
PUSH(x);
break;
}
TARGET(BUILD_SLICE)
if (oparg == 3)
w = POP();
else
w = NULL;
v = POP();
u = TOP();
x = PySlice_New(u, v, w);
Py_DECREF(u);
Py_DECREF(v);
Py_XDECREF(w);
SET_TOP(x);
if (x != NULL) DISPATCH();
break;
TARGET(EXTENDED_ARG)
opcode = NEXTOP();
oparg = oparg<<16 | NEXTARG();
goto dispatch_opcode;
#if USE_COMPUTED_GOTOS
_unknown_opcode:
#endif
default:
fprintf(stderr,
"XXX lineno: %d, opcode: %d\n",
PyFrame_GetLineNumber(f),
opcode);
PyErr_SetString(PyExc_SystemError, "unknown opcode");
why = WHY_EXCEPTION;
break;
#ifdef CASE_TOO_BIG
}
#endif
} /* switch */
on_error:
READ_TIMESTAMP(inst1);
/* Quickly continue if no error occurred */
if (why == WHY_NOT) {
if (err == 0 && x != NULL) {
#ifdef CHECKEXC
/* This check is expensive! */
if (PyErr_Occurred())
fprintf(stderr,
"XXX undetected error\n");
else {
#endif
READ_TIMESTAMP(loop1);
continue; /* Normal, fast path */
#ifdef CHECKEXC
}
#endif
}
why = WHY_EXCEPTION;
x = Py_None;
err = 0;
}
/* Double-check exception status */
if (why == WHY_EXCEPTION || why == WHY_RERAISE) {
if (!PyErr_Occurred()) {
PyErr_SetString(PyExc_SystemError,
"error return without exception set");
why = WHY_EXCEPTION;
}
}
#ifdef CHECKEXC
else {
/* This check is expensive! */
if (PyErr_Occurred()) {
char buf[128];
sprintf(buf, "Stack unwind with exception "
"set and why=%d", why);
Py_FatalError(buf);
}
}
#endif
/* Log traceback info if this is a real exception */
if (why == WHY_EXCEPTION) {
PyTraceBack_Here(f);
if (tstate->c_tracefunc != NULL)
call_exc_trace(tstate->c_tracefunc,
tstate->c_traceobj, f);
}
/* For the rest, treat WHY_RERAISE as WHY_EXCEPTION */
if (why == WHY_RERAISE)
why = WHY_EXCEPTION;
/* Unwind stacks if a (pseudo) exception occurred */
fast_block_end:
while (why != WHY_NOT && f->f_iblock > 0) {
/* Peek at the current block. */
PyTryBlock *b = &f->f_blockstack[f->f_iblock - 1];
assert(why != WHY_YIELD);
if (b->b_type == SETUP_LOOP && why == WHY_CONTINUE) {
why = WHY_NOT;
JUMPTO(PyLong_AS_LONG(retval));
Py_DECREF(retval);
break;
}
/* Now we have to pop the block. */
f->f_iblock--;
if (b->b_type == EXCEPT_HANDLER) {
UNWIND_EXCEPT_HANDLER(b);
continue;
}
UNWIND_BLOCK(b);
if (b->b_type == SETUP_LOOP && why == WHY_BREAK) {
why = WHY_NOT;
JUMPTO(b->b_handler);
break;
}
if (why == WHY_EXCEPTION && (b->b_type == SETUP_EXCEPT
|| b->b_type == SETUP_FINALLY)) {
PyObject *exc, *val, *tb;
int handler = b->b_handler;
/* Beware, this invalidates all b->b_* fields */
PyFrame_BlockSetup(f, EXCEPT_HANDLER, -1, STACK_LEVEL());
PUSH(tstate->exc_traceback);
PUSH(tstate->exc_value);
if (tstate->exc_type != NULL) {
PUSH(tstate->exc_type);
}
else {
Py_INCREF(Py_None);
PUSH(Py_None);
}
PyErr_Fetch(&exc, &val, &tb);
/* Make the raw exception data
available to the handler,
so a program can emulate the
Python main loop. */
PyErr_NormalizeException(
&exc, &val, &tb);
PyException_SetTraceback(val, tb);
Py_INCREF(exc);
tstate->exc_type = exc;
Py_INCREF(val);
tstate->exc_value = val;
tstate->exc_traceback = tb;
if (tb == NULL)
tb = Py_None;
Py_INCREF(tb);
PUSH(tb);
PUSH(val);
PUSH(exc);
why = WHY_NOT;
JUMPTO(handler);
break;
}
if (b->b_type == SETUP_FINALLY) {
if (why & (WHY_RETURN | WHY_CONTINUE))
PUSH(retval);
PUSH(PyLong_FromLong((long)why));
why = WHY_NOT;
JUMPTO(b->b_handler);
break;
}
} /* unwind stack */
/* End the loop if we still have an error (or return) */
if (why != WHY_NOT)
break;
READ_TIMESTAMP(loop1);
} /* main loop */
assert(why != WHY_YIELD);
/* Pop remaining stack entries. */
while (!EMPTY()) {
v = POP();
Py_XDECREF(v);
}
if (why != WHY_RETURN)
retval = NULL;
fast_yield:
if (tstate->use_tracing) {
if (tstate->c_tracefunc) {
if (why == WHY_RETURN || why == WHY_YIELD) {
if (call_trace(tstate->c_tracefunc,
tstate->c_traceobj, f,
PyTrace_RETURN, retval)) {
Py_XDECREF(retval);
retval = NULL;
why = WHY_EXCEPTION;
}
}
else if (why == WHY_EXCEPTION) {
call_trace_protected(tstate->c_tracefunc,
tstate->c_traceobj, f,
PyTrace_RETURN, NULL);
}
}
if (tstate->c_profilefunc) {
if (why == WHY_EXCEPTION)
call_trace_protected(tstate->c_profilefunc,
tstate->c_profileobj, f,
PyTrace_RETURN, NULL);
else if (call_trace(tstate->c_profilefunc,
tstate->c_profileobj, f,
PyTrace_RETURN, retval)) {
Py_XDECREF(retval);
retval = NULL;
why = WHY_EXCEPTION;
}
}
}
/* pop frame */
exit_eval_frame:
Py_LeaveRecursiveCall();
tstate->frame = f->f_back;
return retval;
}
/* This is gonna seem *real weird*, but if you put some other code between
PyEval_EvalFrame() and PyEval_EvalCodeEx() you will need to adjust
the test in the if statements in Misc/gdbinit (pystack and pystackv). */
PyObject *
PyEval_EvalCodeEx(PyObject *_co, PyObject *globals, PyObject *locals,
PyObject **args, int argcount, PyObject **kws, int kwcount,
PyObject **defs, int defcount, PyObject *kwdefs, PyObject *closure)
{
PyCodeObject* co = (PyCodeObject*)_co;
register PyFrameObject *f;
register PyObject *retval = NULL;
register PyObject **fastlocals, **freevars;
PyThreadState *tstate = PyThreadState_GET();
PyObject *x, *u;
int total_args = co->co_argcount + co->co_kwonlyargcount;
if (globals == NULL) {
PyErr_SetString(PyExc_SystemError,
"PyEval_EvalCodeEx: NULL globals");
return NULL;
}
assert(tstate != NULL);
assert(globals != NULL);
f = PyFrame_New(tstate, co, globals, locals);
if (f == NULL)
return NULL;
fastlocals = f->f_localsplus;
freevars = f->f_localsplus + co->co_nlocals;
if (total_args || co->co_flags & (CO_VARARGS | CO_VARKEYWORDS)) {
int i;
int n = argcount;
PyObject *kwdict = NULL;
if (co->co_flags & CO_VARKEYWORDS) {
kwdict = PyDict_New();
if (kwdict == NULL)
goto fail;
i = total_args;
if (co->co_flags & CO_VARARGS)
i++;
SETLOCAL(i, kwdict);
}
if (argcount > co->co_argcount) {
if (!(co->co_flags & CO_VARARGS)) {
PyErr_Format(PyExc_TypeError,
"%U() takes %s %d "
"positional argument%s (%d given)",
co->co_name,
defcount ? "at most" : "exactly",
co->co_argcount,
co->co_argcount == 1 ? "" : "s",
argcount + kwcount);
goto fail;
}
n = co->co_argcount;
}
for (i = 0; i < n; i++) {
x = args[i];
Py_INCREF(x);
SETLOCAL(i, x);
}
if (co->co_flags & CO_VARARGS) {
u = PyTuple_New(argcount - n);
if (u == NULL)
goto fail;
SETLOCAL(total_args, u);
for (i = n; i < argcount; i++) {
x = args[i];
Py_INCREF(x);
PyTuple_SET_ITEM(u, i-n, x);
}
}
for (i = 0; i < kwcount; i++) {
PyObject **co_varnames;
PyObject *keyword = kws[2*i];
PyObject *value = kws[2*i + 1];
int j;
if (keyword == NULL || !PyUnicode_Check(keyword)) {
PyErr_Format(PyExc_TypeError,
"%U() keywords must be strings",
co->co_name);
goto fail;
}
/* Speed hack: do raw pointer compares. As names are
normally interned this should almost always hit. */
co_varnames = ((PyTupleObject *)(co->co_varnames))->ob_item;
for (j = 0; j < total_args; j++) {
PyObject *nm = co_varnames[j];
if (nm == keyword)
goto kw_found;
}
/* Slow fallback, just in case */
for (j = 0; j < total_args; j++) {
PyObject *nm = co_varnames[j];
int cmp = PyObject_RichCompareBool(
keyword, nm, Py_EQ);
if (cmp > 0)
goto kw_found;
else if (cmp < 0)
goto fail;
}
if (j >= total_args && kwdict == NULL) {
PyErr_Format(PyExc_TypeError,
"%U() got an unexpected "
"keyword argument '%S'",
co->co_name,
keyword);
goto fail;
}
PyDict_SetItem(kwdict, keyword, value);
continue;
kw_found:
if (GETLOCAL(j) != NULL) {
PyErr_Format(PyExc_TypeError,
"%U() got multiple "
"values for keyword "
"argument '%S'",
co->co_name,
keyword);
goto fail;
}
Py_INCREF(value);
SETLOCAL(j, value);
}
if (co->co_kwonlyargcount > 0) {
for (i = co->co_argcount; i < total_args; i++) {
PyObject *name;
if (GETLOCAL(i) != NULL)
continue;
name = PyTuple_GET_ITEM(co->co_varnames, i);
if (kwdefs != NULL) {
PyObject *def = PyDict_GetItem(kwdefs, name);
if (def) {
Py_INCREF(def);
SETLOCAL(i, def);
continue;
}
}
PyErr_Format(PyExc_TypeError,
"%U() needs keyword-only argument %S",
co->co_name, name);
goto fail;
}
}
if (argcount < co->co_argcount) {
int m = co->co_argcount - defcount;
for (i = argcount; i < m; i++) {
if (GETLOCAL(i) == NULL) {
int j, given = 0;
for (j = 0; j < co->co_argcount; j++)
if (GETLOCAL(j))
given++;
PyErr_Format(PyExc_TypeError,
"%U() takes %s %d "
"argument%s "
"(%d given)",
co->co_name,
((co->co_flags & CO_VARARGS) ||
defcount) ? "at least"
: "exactly",
m, m == 1 ? "" : "s", given);
goto fail;
}
}
if (n > m)
i = n - m;
else
i = 0;
for (; i < defcount; i++) {
if (GETLOCAL(m+i) == NULL) {
PyObject *def = defs[i];
Py_INCREF(def);
SETLOCAL(m+i, def);
}
}
}
}
else if (argcount > 0 || kwcount > 0) {
PyErr_Format(PyExc_TypeError,
"%U() takes no arguments (%d given)",
co->co_name,
argcount + kwcount);
goto fail;
}
/* Allocate and initialize storage for cell vars, and copy free
vars into frame. This isn't too efficient right now. */
if (PyTuple_GET_SIZE(co->co_cellvars)) {
int i, j, nargs, found;
Py_UNICODE *cellname, *argname;
PyObject *c;
nargs = total_args;
if (co->co_flags & CO_VARARGS)
nargs++;
if (co->co_flags & CO_VARKEYWORDS)
nargs++;
/* Initialize each cell var, taking into account
cell vars that are initialized from arguments.
Should arrange for the compiler to put cellvars
that are arguments at the beginning of the cellvars
list so that we can march over it more efficiently?
*/
for (i = 0; i < PyTuple_GET_SIZE(co->co_cellvars); ++i) {
cellname = PyUnicode_AS_UNICODE(
PyTuple_GET_ITEM(co->co_cellvars, i));
found = 0;
for (j = 0; j < nargs; j++) {
argname = PyUnicode_AS_UNICODE(
PyTuple_GET_ITEM(co->co_varnames, j));
if (Py_UNICODE_strcmp(cellname, argname) == 0) {
c = PyCell_New(GETLOCAL(j));
if (c == NULL)
goto fail;
GETLOCAL(co->co_nlocals + i) = c;
found = 1;
break;
}
}
if (found == 0) {
c = PyCell_New(NULL);
if (c == NULL)
goto fail;
SETLOCAL(co->co_nlocals + i, c);
}
}
}
if (PyTuple_GET_SIZE(co->co_freevars)) {
int i;
for (i = 0; i < PyTuple_GET_SIZE(co->co_freevars); ++i) {
PyObject *o = PyTuple_GET_ITEM(closure, i);
Py_INCREF(o);
freevars[PyTuple_GET_SIZE(co->co_cellvars) + i] = o;
}
}
if (co->co_flags & CO_GENERATOR) {
/* Don't need to keep the reference to f_back, it will be set
* when the generator is resumed. */
Py_XDECREF(f->f_back);
f->f_back = NULL;
PCALL(PCALL_GENERATOR);
/* Create a new generator that owns the ready to run frame
* and return that as the value. */
return PyGen_New(f);
}
retval = PyEval_EvalFrameEx(f,0);
fail: /* Jump here from prelude on failure */
/* decref'ing the frame can cause __del__ methods to get invoked,
which can call back into Python. While we're done with the
current Python frame (f), the associated C stack is still in use,
so recursion_depth must be boosted for the duration.
*/
assert(tstate != NULL);
++tstate->recursion_depth;
Py_DECREF(f);
--tstate->recursion_depth;
return retval;
}
static PyObject *
special_lookup(PyObject *o, char *meth, PyObject **cache)
{
PyObject *res;
res = _PyObject_LookupSpecial(o, meth, cache);
if (res == NULL && !PyErr_Occurred()) {
PyErr_SetObject(PyExc_AttributeError, *cache);
return NULL;
}
return res;
}
/* Logic for the raise statement (too complicated for inlining).
This *consumes* a reference count to each of its arguments. */
static enum why_code
do_raise(PyObject *exc, PyObject *cause)
{
PyObject *type = NULL, *value = NULL;
if (exc == NULL) {
/* Reraise */
PyThreadState *tstate = PyThreadState_GET();
PyObject *tb;
type = tstate->exc_type;
value = tstate->exc_value;
tb = tstate->exc_traceback;
if (type == Py_None) {
PyErr_SetString(PyExc_RuntimeError,
"No active exception to reraise");
return WHY_EXCEPTION;
}
Py_XINCREF(type);
Py_XINCREF(value);
Py_XINCREF(tb);
PyErr_Restore(type, value, tb);
return WHY_RERAISE;
}
/* We support the following forms of raise:
raise
raise <instance>
raise <type> */
if (PyExceptionClass_Check(exc)) {
type = exc;
value = PyObject_CallObject(exc, NULL);
if (value == NULL)
goto raise_error;
}
else if (PyExceptionInstance_Check(exc)) {
value = exc;
type = PyExceptionInstance_Class(exc);
Py_INCREF(type);
}
else {
/* Not something you can raise. You get an exception
anyway, just not what you specified :-) */
Py_DECREF(exc);
PyErr_SetString(PyExc_TypeError,
"exceptions must derive from BaseException");
goto raise_error;
}
if (cause) {
PyObject *fixed_cause;
if (PyExceptionClass_Check(cause)) {
fixed_cause = PyObject_CallObject(cause, NULL);
if (fixed_cause == NULL)
goto raise_error;
Py_DECREF(cause);
}
else if (PyExceptionInstance_Check(cause)) {
fixed_cause = cause;
}
else {
PyErr_SetString(PyExc_TypeError,
"exception causes must derive from "
"BaseException");
goto raise_error;
}
PyException_SetCause(value, fixed_cause);
}
PyErr_SetObject(type, value);
/* PyErr_SetObject incref's its arguments */
Py_XDECREF(value);
Py_XDECREF(type);
return WHY_EXCEPTION;
raise_error:
Py_XDECREF(value);
Py_XDECREF(type);
Py_XDECREF(cause);
return WHY_EXCEPTION;
}
/* Iterate v argcnt times and store the results on the stack (via decreasing
sp). Return 1 for success, 0 if error.
If argcntafter == -1, do a simple unpack. If it is >= 0, do an unpack
with a variable target.
*/
static int
unpack_iterable(PyObject *v, int argcnt, int argcntafter, PyObject **sp)
{
int i = 0, j = 0;
Py_ssize_t ll = 0;
PyObject *it; /* iter(v) */
PyObject *w;
PyObject *l = NULL; /* variable list */
assert(v != NULL);
it = PyObject_GetIter(v);
if (it == NULL)
goto Error;
for (; i < argcnt; i++) {
w = PyIter_Next(it);
if (w == NULL) {
/* Iterator done, via error or exhaustion. */
if (!PyErr_Occurred()) {
PyErr_Format(PyExc_ValueError,
"need more than %d value%s to unpack",
i, i == 1 ? "" : "s");
}
goto Error;
}
*--sp = w;
}
if (argcntafter == -1) {
/* We better have exhausted the iterator now. */
w = PyIter_Next(it);
if (w == NULL) {
if (PyErr_Occurred())
goto Error;
Py_DECREF(it);
return 1;
}
Py_DECREF(w);
PyErr_Format(PyExc_ValueError, "too many values to unpack "
"(expected %d)", argcnt);
goto Error;
}
l = PySequence_List(it);
if (l == NULL)
goto Error;
*--sp = l;
i++;
ll = PyList_GET_SIZE(l);
if (ll < argcntafter) {
PyErr_Format(PyExc_ValueError, "need more than %zd values to unpack",
argcnt + ll);
goto Error;
}
/* Pop the "after-variable" args off the list. */
for (j = argcntafter; j > 0; j--, i++) {
*--sp = PyList_GET_ITEM(l, ll - j);
}
/* Resize the list. */
Py_SIZE(l) = ll - argcntafter;
Py_DECREF(it);
return 1;
Error:
for (; i > 0; i--, sp++)
Py_DECREF(*sp);
Py_XDECREF(it);
return 0;
}
#ifdef LLTRACE
static int
prtrace(PyObject *v, char *str)
{
printf("%s ", str);
if (PyObject_Print(v, stdout, 0) != 0)
PyErr_Clear(); /* Don't know what else to do */
printf("\n");
return 1;
}
#endif
static void
call_exc_trace(Py_tracefunc func, PyObject *self, PyFrameObject *f)
{
PyObject *type, *value, *traceback, *arg;
int err;
PyErr_Fetch(&type, &value, &traceback);
if (value == NULL) {
value = Py_None;
Py_INCREF(value);
}
arg = PyTuple_Pack(3, type, value, traceback);
if (arg == NULL) {
PyErr_Restore(type, value, traceback);
return;
}
err = call_trace(func, self, f, PyTrace_EXCEPTION, arg);
Py_DECREF(arg);
if (err == 0)
PyErr_Restore(type, value, traceback);
else {
Py_XDECREF(type);
Py_XDECREF(value);
Py_XDECREF(traceback);
}
}
static int
call_trace_protected(Py_tracefunc func, PyObject *obj, PyFrameObject *frame,
int what, PyObject *arg)
{
PyObject *type, *value, *traceback;
int err;
PyErr_Fetch(&type, &value, &traceback);
err = call_trace(func, obj, frame, what, arg);
if (err == 0)
{
PyErr_Restore(type, value, traceback);
return 0;
}
else {
Py_XDECREF(type);
Py_XDECREF(value);
Py_XDECREF(traceback);
return -1;
}
}
static int
call_trace(Py_tracefunc func, PyObject *obj, PyFrameObject *frame,
int what, PyObject *arg)
{
register PyThreadState *tstate = frame->f_tstate;
int result;
if (tstate->tracing)
return 0;
tstate->tracing++;
tstate->use_tracing = 0;
result = func(obj, frame, what, arg);
tstate->use_tracing = ((tstate->c_tracefunc != NULL)
|| (tstate->c_profilefunc != NULL));
tstate->tracing--;
return result;
}
PyObject *
_PyEval_CallTracing(PyObject *func, PyObject *args)
{
PyFrameObject *frame = PyEval_GetFrame();
PyThreadState *tstate = frame->f_tstate;
int save_tracing = tstate->tracing;
int save_use_tracing = tstate->use_tracing;
PyObject *result;
tstate->tracing = 0;
tstate->use_tracing = ((tstate->c_tracefunc != NULL)
|| (tstate->c_profilefunc != NULL));
result = PyObject_Call(func, args, NULL);
tstate->tracing = save_tracing;
tstate->use_tracing = save_use_tracing;
return result;
}
/* See Objects/lnotab_notes.txt for a description of how tracing works. */
static int
maybe_call_line_trace(Py_tracefunc func, PyObject *obj,
PyFrameObject *frame, int *instr_lb, int *instr_ub,
int *instr_prev)
{
int result = 0;
int line = frame->f_lineno;
/* If the last instruction executed isn't in the current
instruction window, reset the window.
*/
if (frame->f_lasti < *instr_lb || frame->f_lasti >= *instr_ub) {
PyAddrPair bounds;
line = _PyCode_CheckLineNumber(frame->f_code, frame->f_lasti,
&bounds);
*instr_lb = bounds.ap_lower;
*instr_ub = bounds.ap_upper;
}
/* If the last instruction falls at the start of a line or if
it represents a jump backwards, update the frame's line
number and call the trace function. */
if (frame->f_lasti == *instr_lb || frame->f_lasti < *instr_prev) {
frame->f_lineno = line;
result = call_trace(func, obj, frame, PyTrace_LINE, Py_None);
}
*instr_prev = frame->f_lasti;
return result;
}
void
PyEval_SetProfile(Py_tracefunc func, PyObject *arg)
{
PyThreadState *tstate = PyThreadState_GET();
PyObject *temp = tstate->c_profileobj;
Py_XINCREF(arg);
tstate->c_profilefunc = NULL;
tstate->c_profileobj = NULL;
/* Must make sure that tracing is not ignored if 'temp' is freed */
tstate->use_tracing = tstate->c_tracefunc != NULL;
Py_XDECREF(temp);
tstate->c_profilefunc = func;
tstate->c_profileobj = arg;
/* Flag that tracing or profiling is turned on */
tstate->use_tracing = (func != NULL) || (tstate->c_tracefunc != NULL);
}
void
PyEval_SetTrace(Py_tracefunc func, PyObject *arg)
{
PyThreadState *tstate = PyThreadState_GET();
PyObject *temp = tstate->c_traceobj;
_Py_TracingPossible += (func != NULL) - (tstate->c_tracefunc != NULL);
Py_XINCREF(arg);
tstate->c_tracefunc = NULL;
tstate->c_traceobj = NULL;
/* Must make sure that profiling is not ignored if 'temp' is freed */
tstate->use_tracing = tstate->c_profilefunc != NULL;
Py_XDECREF(temp);
tstate->c_tracefunc = func;
tstate->c_traceobj = arg;
/* Flag that tracing or profiling is turned on */
tstate->use_tracing = ((func != NULL)
|| (tstate->c_profilefunc != NULL));
}
PyObject *
PyEval_GetBuiltins(void)
{
PyFrameObject *current_frame = PyEval_GetFrame();
if (current_frame == NULL)
return PyThreadState_GET()->interp->builtins;
else
return current_frame->f_builtins;
}
PyObject *
PyEval_GetLocals(void)
{
PyFrameObject *current_frame = PyEval_GetFrame();
if (current_frame == NULL)
return NULL;
PyFrame_FastToLocals(current_frame);
return current_frame->f_locals;
}
PyObject *
PyEval_GetGlobals(void)
{
PyFrameObject *current_frame = PyEval_GetFrame();
if (current_frame == NULL)
return NULL;
else
return current_frame->f_globals;
}
PyFrameObject *
PyEval_GetFrame(void)
{
PyThreadState *tstate = PyThreadState_GET();
return _PyThreadState_GetFrame(tstate);
}
int
PyEval_MergeCompilerFlags(PyCompilerFlags *cf)
{
PyFrameObject *current_frame = PyEval_GetFrame();
int result = cf->cf_flags != 0;
if (current_frame != NULL) {
const int codeflags = current_frame->f_code->co_flags;
const int compilerflags = codeflags & PyCF_MASK;
if (compilerflags) {
result = 1;
cf->cf_flags |= compilerflags;
}
#if 0 /* future keyword */
if (codeflags & CO_GENERATOR_ALLOWED) {
result = 1;
cf->cf_flags |= CO_GENERATOR_ALLOWED;
}
#endif
}
return result;
}
/* External interface to call any callable object.
The arg must be a tuple or NULL. The kw must be a dict or NULL. */
PyObject *
PyEval_CallObjectWithKeywords(PyObject *func, PyObject *arg, PyObject *kw)
{
PyObject *result;
if (arg == NULL) {
arg = PyTuple_New(0);
if (arg == NULL)
return NULL;
}
else if (!PyTuple_Check(arg)) {
PyErr_SetString(PyExc_TypeError,
"argument list must be a tuple");
return NULL;
}
else
Py_INCREF(arg);
if (kw != NULL && !PyDict_Check(kw)) {
PyErr_SetString(PyExc_TypeError,
"keyword list must be a dictionary");
Py_DECREF(arg);
return NULL;
}
result = PyObject_Call(func, arg, kw);
Py_DECREF(arg);
return result;
}
const char *
PyEval_GetFuncName(PyObject *func)
{
if (PyMethod_Check(func))
return PyEval_GetFuncName(PyMethod_GET_FUNCTION(func));
else if (PyFunction_Check(func))
return _PyUnicode_AsString(((PyFunctionObject*)func)->func_name);
else if (PyCFunction_Check(func))
return ((PyCFunctionObject*)func)->m_ml->ml_name;
else
return func->ob_type->tp_name;
}
const char *
PyEval_GetFuncDesc(PyObject *func)
{
if (PyMethod_Check(func))
return "()";
else if (PyFunction_Check(func))
return "()";
else if (PyCFunction_Check(func))
return "()";
else
return " object";
}
static void
err_args(PyObject *func, int flags, int nargs)
{
if (flags & METH_NOARGS)
PyErr_Format(PyExc_TypeError,
"%.200s() takes no arguments (%d given)",
((PyCFunctionObject *)func)->m_ml->ml_name,
nargs);
else
PyErr_Format(PyExc_TypeError,
"%.200s() takes exactly one argument (%d given)",
((PyCFunctionObject *)func)->m_ml->ml_name,
nargs);
}
#define C_TRACE(x, call) \
if (tstate->use_tracing && tstate->c_profilefunc) { \
if (call_trace(tstate->c_profilefunc, \
tstate->c_profileobj, \
tstate->frame, PyTrace_C_CALL, \
func)) { \
x = NULL; \
} \
else { \
x = call; \
if (tstate->c_profilefunc != NULL) { \
if (x == NULL) { \
call_trace_protected(tstate->c_profilefunc, \
tstate->c_profileobj, \
tstate->frame, PyTrace_C_EXCEPTION, \
func); \
/* XXX should pass (type, value, tb) */ \
} else { \
if (call_trace(tstate->c_profilefunc, \
tstate->c_profileobj, \
tstate->frame, PyTrace_C_RETURN, \
func)) { \
Py_DECREF(x); \
x = NULL; \
} \
} \
} \
} \
} else { \
x = call; \
}
static PyObject *
call_function(PyObject ***pp_stack, int oparg
#ifdef WITH_TSC
, uint64* pintr0, uint64* pintr1
#endif
)
{
int na = oparg & 0xff;
int nk = (oparg>>8) & 0xff;
int n = na + 2 * nk;
PyObject **pfunc = (*pp_stack) - n - 1;
PyObject *func = *pfunc;
PyObject *x, *w;
/* Always dispatch PyCFunction first, because these are
presumed to be the most frequent callable object.
*/
if (PyCFunction_Check(func) && nk == 0) {
int flags = PyCFunction_GET_FLAGS(func);
PyThreadState *tstate = PyThreadState_GET();
PCALL(PCALL_CFUNCTION);
if (flags & (METH_NOARGS | METH_O)) {
PyCFunction meth = PyCFunction_GET_FUNCTION(func);
PyObject *self = PyCFunction_GET_SELF(func);
if (flags & METH_NOARGS && na == 0) {
C_TRACE(x, (*meth)(self,NULL));
}
else if (flags & METH_O && na == 1) {
PyObject *arg = EXT_POP(*pp_stack);
C_TRACE(x, (*meth)(self,arg));
Py_DECREF(arg);
}
else {
err_args(func, flags, na);
x = NULL;
}
}
else {
PyObject *callargs;
callargs = load_args(pp_stack, na);
READ_TIMESTAMP(*pintr0);
C_TRACE(x, PyCFunction_Call(func,callargs,NULL));
READ_TIMESTAMP(*pintr1);
Py_XDECREF(callargs);
}
} else {
if (PyMethod_Check(func) && PyMethod_GET_SELF(func) != NULL) {
/* optimize access to bound methods */
PyObject *self = PyMethod_GET_SELF(func);
PCALL(PCALL_METHOD);
PCALL(PCALL_BOUND_METHOD);
Py_INCREF(self);
func = PyMethod_GET_FUNCTION(func);
Py_INCREF(func);
Py_DECREF(*pfunc);
*pfunc = self;
na++;
n++;
} else
Py_INCREF(func);
READ_TIMESTAMP(*pintr0);
if (PyFunction_Check(func))
x = fast_function(func, pp_stack, n, na, nk);
else
x = do_call(func, pp_stack, na, nk);
READ_TIMESTAMP(*pintr1);
Py_DECREF(func);
}
/* Clear the stack of the function object. Also removes
the arguments in case they weren't consumed already
(fast_function() and err_args() leave them on the stack).
*/
while ((*pp_stack) > pfunc) {
w = EXT_POP(*pp_stack);
Py_DECREF(w);
PCALL(PCALL_POP);
}
return x;
}
/* The fast_function() function optimize calls for which no argument
tuple is necessary; the objects are passed directly from the stack.
For the simplest case -- a function that takes only positional
arguments and is called with only positional arguments -- it
inlines the most primitive frame setup code from
PyEval_EvalCodeEx(), which vastly reduces the checks that must be
done before evaluating the frame.
*/
static PyObject *
fast_function(PyObject *func, PyObject ***pp_stack, int n, int na, int nk)
{
PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
PyObject *globals = PyFunction_GET_GLOBALS(func);
PyObject *argdefs = PyFunction_GET_DEFAULTS(func);
PyObject *kwdefs = PyFunction_GET_KW_DEFAULTS(func);
PyObject **d = NULL;
int nd = 0;
PCALL(PCALL_FUNCTION);
PCALL(PCALL_FAST_FUNCTION);
if (argdefs == NULL && co->co_argcount == n &&
co->co_kwonlyargcount == 0 && nk==0 &&
co->co_flags == (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)) {
PyFrameObject *f;
PyObject *retval = NULL;
PyThreadState *tstate = PyThreadState_GET();
PyObject **fastlocals, **stack;
int i;
PCALL(PCALL_FASTER_FUNCTION);
assert(globals != NULL);
/* XXX Perhaps we should create a specialized
PyFrame_New() that doesn't take locals, but does
take builtins without sanity checking them.
*/
assert(tstate != NULL);
f = PyFrame_New(tstate, co, globals, NULL);
if (f == NULL)
return NULL;
fastlocals = f->f_localsplus;
stack = (*pp_stack) - n;
for (i = 0; i < n; i++) {
Py_INCREF(*stack);
fastlocals[i] = *stack++;
}
retval = PyEval_EvalFrameEx(f,0);
++tstate->recursion_depth;
Py_DECREF(f);
--tstate->recursion_depth;
return retval;
}
if (argdefs != NULL) {
d = &PyTuple_GET_ITEM(argdefs, 0);
nd = Py_SIZE(argdefs);
}
return PyEval_EvalCodeEx((PyObject*)co, globals,
(PyObject *)NULL, (*pp_stack)-n, na,
(*pp_stack)-2*nk, nk, d, nd, kwdefs,
PyFunction_GET_CLOSURE(func));
}
static PyObject *
update_keyword_args(PyObject *orig_kwdict, int nk, PyObject ***pp_stack,
PyObject *func)
{
PyObject *kwdict = NULL;
if (orig_kwdict == NULL)
kwdict = PyDict_New();
else {
kwdict = PyDict_Copy(orig_kwdict);
Py_DECREF(orig_kwdict);
}
if (kwdict == NULL)
return NULL;
while (--nk >= 0) {
int err;
PyObject *value = EXT_POP(*pp_stack);
PyObject *key = EXT_POP(*pp_stack);
if (PyDict_GetItem(kwdict, key) != NULL) {
PyErr_Format(PyExc_TypeError,
"%.200s%s got multiple values "
"for keyword argument '%U'",
PyEval_GetFuncName(func),
PyEval_GetFuncDesc(func),
key);
Py_DECREF(key);
Py_DECREF(value);
Py_DECREF(kwdict);
return NULL;
}
err = PyDict_SetItem(kwdict, key, value);
Py_DECREF(key);
Py_DECREF(value);
if (err) {
Py_DECREF(kwdict);
return NULL;
}
}
return kwdict;
}
static PyObject *
update_star_args(int nstack, int nstar, PyObject *stararg,
PyObject ***pp_stack)
{
PyObject *callargs, *w;
callargs = PyTuple_New(nstack + nstar);
if (callargs == NULL) {
return NULL;
}
if (nstar) {
int i;
for (i = 0; i < nstar; i++) {
PyObject *a = PyTuple_GET_ITEM(stararg, i);
Py_INCREF(a);
PyTuple_SET_ITEM(callargs, nstack + i, a);
}
}
while (--nstack >= 0) {
w = EXT_POP(*pp_stack);
PyTuple_SET_ITEM(callargs, nstack, w);
}
return callargs;
}
static PyObject *
load_args(PyObject ***pp_stack, int na)
{
PyObject *args = PyTuple_New(na);
PyObject *w;
if (args == NULL)
return NULL;
while (--na >= 0) {
w = EXT_POP(*pp_stack);
PyTuple_SET_ITEM(args, na, w);
}
return args;
}
static PyObject *
do_call(PyObject *func, PyObject ***pp_stack, int na, int nk)
{
PyObject *callargs = NULL;
PyObject *kwdict = NULL;
PyObject *result = NULL;
if (nk > 0) {
kwdict = update_keyword_args(NULL, nk, pp_stack, func);
if (kwdict == NULL)
goto call_fail;
}
callargs = load_args(pp_stack, na);
if (callargs == NULL)
goto call_fail;
#ifdef CALL_PROFILE
/* At this point, we have to look at the type of func to
update the call stats properly. Do it here so as to avoid
exposing the call stats machinery outside ceval.c
*/
if (PyFunction_Check(func))
PCALL(PCALL_FUNCTION);
else if (PyMethod_Check(func))
PCALL(PCALL_METHOD);
else if (PyType_Check(func))
PCALL(PCALL_TYPE);
else if (PyCFunction_Check(func))
PCALL(PCALL_CFUNCTION);
else
PCALL(PCALL_OTHER);
#endif
if (PyCFunction_Check(func)) {
PyThreadState *tstate = PyThreadState_GET();
C_TRACE(result, PyCFunction_Call(func, callargs, kwdict));
}
else
result = PyObject_Call(func, callargs, kwdict);
call_fail:
Py_XDECREF(callargs);
Py_XDECREF(kwdict);
return result;
}
static PyObject *
ext_do_call(PyObject *func, PyObject ***pp_stack, int flags, int na, int nk)
{
int nstar = 0;
PyObject *callargs = NULL;
PyObject *stararg = NULL;
PyObject *kwdict = NULL;
PyObject *result = NULL;
if (flags & CALL_FLAG_KW) {
kwdict = EXT_POP(*pp_stack);
if (!PyDict_Check(kwdict)) {
PyObject *d;
d = PyDict_New();
if (d == NULL)
goto ext_call_fail;
if (PyDict_Update(d, kwdict) != 0) {
Py_DECREF(d);
/* PyDict_Update raises attribute
* error (percolated from an attempt
* to get 'keys' attribute) instead of
* a type error if its second argument
* is not a mapping.
*/
if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Format(PyExc_TypeError,
"%.200s%.200s argument after ** "
"must be a mapping, not %.200s",
PyEval_GetFuncName(func),
PyEval_GetFuncDesc(func),
kwdict->ob_type->tp_name);
}
goto ext_call_fail;
}
Py_DECREF(kwdict);
kwdict = d;
}
}
if (flags & CALL_FLAG_VAR) {
stararg = EXT_POP(*pp_stack);
if (!PyTuple_Check(stararg)) {
PyObject *t = NULL;
t = PySequence_Tuple(stararg);
if (t == NULL) {
if (PyErr_ExceptionMatches(PyExc_TypeError)) {
PyErr_Format(PyExc_TypeError,
"%.200s%.200s argument after * "
"must be a sequence, not %200s",
PyEval_GetFuncName(func),
PyEval_GetFuncDesc(func),
stararg->ob_type->tp_name);
}
goto ext_call_fail;
}
Py_DECREF(stararg);
stararg = t;
}
nstar = PyTuple_GET_SIZE(stararg);
}
if (nk > 0) {
kwdict = update_keyword_args(kwdict, nk, pp_stack, func);
if (kwdict == NULL)
goto ext_call_fail;
}
callargs = update_star_args(na, nstar, stararg, pp_stack);
if (callargs == NULL)
goto ext_call_fail;
#ifdef CALL_PROFILE
/* At this point, we have to look at the type of func to
update the call stats properly. Do it here so as to avoid
exposing the call stats machinery outside ceval.c
*/
if (PyFunction_Check(func))
PCALL(PCALL_FUNCTION);
else if (PyMethod_Check(func))
PCALL(PCALL_METHOD);
else if (PyType_Check(func))
PCALL(PCALL_TYPE);
else if (PyCFunction_Check(func))
PCALL(PCALL_CFUNCTION);
else
PCALL(PCALL_OTHER);
#endif
if (PyCFunction_Check(func)) {
PyThreadState *tstate = PyThreadState_GET();
C_TRACE(result, PyCFunction_Call(func, callargs, kwdict));
}
else
result = PyObject_Call(func, callargs, kwdict);
ext_call_fail:
Py_XDECREF(callargs);
Py_XDECREF(kwdict);
Py_XDECREF(stararg);
return result;
}
/* Extract a slice index from a PyInt or PyLong or an object with the
nb_index slot defined, and store in *pi.
Silently reduce values larger than PY_SSIZE_T_MAX to PY_SSIZE_T_MAX,
and silently boost values less than -PY_SSIZE_T_MAX-1 to -PY_SSIZE_T_MAX-1.
Return 0 on error, 1 on success.
*/
/* Note: If v is NULL, return success without storing into *pi. This
is because_PyEval_SliceIndex() is called by apply_slice(), which can be
called by the SLICE opcode with v and/or w equal to NULL.
*/
int
_PyEval_SliceIndex(PyObject *v, Py_ssize_t *pi)
{
if (v != NULL) {
Py_ssize_t x;
if (PyIndex_Check(v)) {
x = PyNumber_AsSsize_t(v, NULL);
if (x == -1 && PyErr_Occurred())
return 0;
}
else {
PyErr_SetString(PyExc_TypeError,
"slice indices must be integers or "
"None or have an __index__ method");
return 0;
}
*pi = x;
}
return 1;
}
#define CANNOT_CATCH_MSG "catching classes that do not inherit from "\
"BaseException is not allowed"
static PyObject *
cmp_outcome(int op, register PyObject *v, register PyObject *w)
{
int res = 0;
switch (op) {
case PyCmp_IS:
res = (v == w);
break;
case PyCmp_IS_NOT:
res = (v != w);
break;
case PyCmp_IN:
res = PySequence_Contains(w, v);
if (res < 0)
return NULL;
break;
case PyCmp_NOT_IN:
res = PySequence_Contains(w, v);
if (res < 0)
return NULL;
res = !res;
break;
case PyCmp_EXC_MATCH:
if (PyTuple_Check(w)) {
Py_ssize_t i, length;
length = PyTuple_Size(w);
for (i = 0; i < length; i += 1) {
PyObject *exc = PyTuple_GET_ITEM(w, i);
if (!PyExceptionClass_Check(exc)) {
PyErr_SetString(PyExc_TypeError,
CANNOT_CATCH_MSG);
return NULL;
}
}
}
else {
if (!PyExceptionClass_Check(w)) {
PyErr_SetString(PyExc_TypeError,
CANNOT_CATCH_MSG);
return NULL;
}
}
res = PyErr_GivenExceptionMatches(v, w);
break;
default:
return PyObject_RichCompare(v, w, op);
}
v = res ? Py_True : Py_False;
Py_INCREF(v);
return v;
}
static PyObject *
import_from(PyObject *v, PyObject *name)
{
PyObject *x;
x = PyObject_GetAttr(v, name);
if (x == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Format(PyExc_ImportError, "cannot import name %S", name);
}
return x;
}
static int
import_all_from(PyObject *locals, PyObject *v)
{
PyObject *all = PyObject_GetAttrString(v, "__all__");
PyObject *dict, *name, *value;
int skip_leading_underscores = 0;
int pos, err;
if (all == NULL) {
if (!PyErr_ExceptionMatches(PyExc_AttributeError))
return -1; /* Unexpected error */
PyErr_Clear();
dict = PyObject_GetAttrString(v, "__dict__");
if (dict == NULL) {
if (!PyErr_ExceptionMatches(PyExc_AttributeError))
return -1;
PyErr_SetString(PyExc_ImportError,
"from-import-* object has no __dict__ and no __all__");
return -1;
}
all = PyMapping_Keys(dict);
Py_DECREF(dict);
if (all == NULL)
return -1;
skip_leading_underscores = 1;
}
for (pos = 0, err = 0; ; pos++) {
name = PySequence_GetItem(all, pos);
if (name == NULL) {
if (!PyErr_ExceptionMatches(PyExc_IndexError))
err = -1;
else
PyErr_Clear();
break;
}
if (skip_leading_underscores &&
PyUnicode_Check(name) &&
PyUnicode_AS_UNICODE(name)[0] == '_')
{
Py_DECREF(name);
continue;
}
value = PyObject_GetAttr(v, name);
if (value == NULL)
err = -1;
else if (PyDict_CheckExact(locals))
err = PyDict_SetItem(locals, name, value);
else
err = PyObject_SetItem(locals, name, value);
Py_DECREF(name);
Py_XDECREF(value);
if (err != 0)
break;
}
Py_DECREF(all);
return err;
}
static void
format_exc_check_arg(PyObject *exc, const char *format_str, PyObject *obj)
{
const char *obj_str;
if (!obj)
return;
obj_str = _PyUnicode_AsString(obj);
if (!obj_str)
return;
PyErr_Format(exc, format_str, obj_str);
}
static void
format_exc_unbound(PyCodeObject *co, int oparg)
{
PyObject *name;
/* Don't stomp existing exception */
if (PyErr_Occurred())
return;
if (oparg < PyTuple_GET_SIZE(co->co_cellvars)) {
name = PyTuple_GET_ITEM(co->co_cellvars,
oparg);
format_exc_check_arg(
PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
name);
} else {
name = PyTuple_GET_ITEM(co->co_freevars, oparg -
PyTuple_GET_SIZE(co->co_cellvars));
format_exc_check_arg(PyExc_NameError,
UNBOUNDFREE_ERROR_MSG, name);
}
}
static PyObject *
unicode_concatenate(PyObject *v, PyObject *w,
PyFrameObject *f, unsigned char *next_instr)
{
/* This function implements 'variable += expr' when both arguments
are (Unicode) strings. */
Py_ssize_t v_len = PyUnicode_GET_SIZE(v);
Py_ssize_t w_len = PyUnicode_GET_SIZE(w);
Py_ssize_t new_len = v_len + w_len;
if (new_len < 0) {
PyErr_SetString(PyExc_OverflowError,
"strings are too large to concat");
return NULL;
}
if (Py_REFCNT(v) == 2) {
/* In the common case, there are 2 references to the value
* stored in 'variable' when the += is performed: one on the
* value stack (in 'v') and one still stored in the
* 'variable'. We try to delete the variable now to reduce
* the refcnt to 1.
*/
switch (*next_instr) {
case STORE_FAST:
{
int oparg = PEEKARG();
PyObject **fastlocals = f->f_localsplus;
if (GETLOCAL(oparg) == v)
SETLOCAL(oparg, NULL);
break;
}
case STORE_DEREF:
{
PyObject **freevars = (f->f_localsplus +
f->f_code->co_nlocals);
PyObject *c = freevars[PEEKARG()];
if (PyCell_GET(c) == v)
PyCell_Set(c, NULL);
break;
}
case STORE_NAME:
{
PyObject *names = f->f_code->co_names;
PyObject *name = GETITEM(names, PEEKARG());
PyObject *locals = f->f_locals;
if (PyDict_CheckExact(locals) &&
PyDict_GetItem(locals, name) == v) {
if (PyDict_DelItem(locals, name) != 0) {
PyErr_Clear();
}
}
break;
}
}
}
if (Py_REFCNT(v) == 1 && !PyUnicode_CHECK_INTERNED(v)) {
/* Now we own the last reference to 'v', so we can resize it
* in-place.
*/
if (PyUnicode_Resize(&v, new_len) != 0) {
/* XXX if PyUnicode_Resize() fails, 'v' has been
* deallocated so it cannot be put back into
* 'variable'. The MemoryError is raised when there
* is no value in 'variable', which might (very
* remotely) be a cause of incompatibilities.
*/
return NULL;
}
/* copy 'w' into the newly allocated area of 'v' */
memcpy(PyUnicode_AS_UNICODE(v) + v_len,
PyUnicode_AS_UNICODE(w), w_len*sizeof(Py_UNICODE));
return v;
}
else {
/* When in-place resizing is not an option. */
w = PyUnicode_Concat(v, w);
Py_DECREF(v);
return w;
}
}
#ifdef DYNAMIC_EXECUTION_PROFILE
static PyObject *
getarray(long a[256])
{
int i;
PyObject *l = PyList_New(256);
if (l == NULL) return NULL;
for (i = 0; i < 256; i++) {
PyObject *x = PyLong_FromLong(a[i]);
if (x == NULL) {
Py_DECREF(l);
return NULL;
}
PyList_SetItem(l, i, x);
}
for (i = 0; i < 256; i++)
a[i] = 0;
return l;
}
PyObject *
_Py_GetDXProfile(PyObject *self, PyObject *args)
{
#ifndef DXPAIRS
return getarray(dxp);
#else
int i;
PyObject *l = PyList_New(257);
if (l == NULL) return NULL;
for (i = 0; i < 257; i++) {
PyObject *x = getarray(dxpairs[i]);
if (x == NULL) {
Py_DECREF(l);
return NULL;
}
PyList_SetItem(l, i, x);
}
return l;
#endif
}
#endif
|