summaryrefslogtreecommitdiff
path: root/src/vm/method.hpp
blob: 151d1cc40b75eb5b3dba2e3a35b2669eb31d156f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
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
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// method.hpp
//

//
// See the book of the runtime entry for overall design:
// file:../../doc/BookOfTheRuntime/ClassLoader/MethodDescDesign.doc
//

#ifndef _METHOD_H 
#define _METHOD_H

#include "cor.h"
#include "util.hpp"
#include "clsload.hpp"
#include "codeman.h"
#include "class.h"
#include "siginfo.hpp"
#include "methodimpl.h"
#include "typedesc.h"
#include <stddef.h>
#include "eeconfig.h"
#include "precode.h"
#include "codeversion.h"

#ifndef FEATURE_PREJIT
#include "fixuppointer.h"
#endif

class Stub;
class FCallMethodDesc;
class FieldDesc;
class NDirect;
class MethodDescChunk;
struct LayoutRawFieldInfo;
class InstantiatedMethodDesc;
class DictionaryLayout;
class Dictionary;
class GCCoverageInfo;
class DynamicMethodDesc;
class ReJitManager;
class CodeVersionManager;
class PrepareCodeConfig;
class CallCounter;

typedef DPTR(FCallMethodDesc)        PTR_FCallMethodDesc;
typedef DPTR(ArrayMethodDesc)        PTR_ArrayMethodDesc;
typedef DPTR(DynamicMethodDesc)      PTR_DynamicMethodDesc;
typedef DPTR(InstantiatedMethodDesc) PTR_InstantiatedMethodDesc;
typedef DPTR(GCCoverageInfo)         PTR_GCCoverageInfo;        // see code:GCCoverageInfo::savedCode

#ifdef FEATURE_MINIMETADATA_IN_TRIAGEDUMPS
GVAL_DECL(DWORD, g_MiniMetaDataBuffMaxSize);
GVAL_DECL(TADDR, g_MiniMetaDataBuffAddress);
#endif // FEATURE_MINIMETADATA_IN_TRIAGEDUMPS

EXTERN_C VOID STDCALL NDirectImportThunk();

#define METHOD_TOKEN_REMAINDER_BIT_COUNT 14
#define METHOD_TOKEN_REMAINDER_MASK ((1 << METHOD_TOKEN_REMAINDER_BIT_COUNT) - 1)
#define METHOD_TOKEN_RANGE_BIT_COUNT (24 - METHOD_TOKEN_REMAINDER_BIT_COUNT)
#define METHOD_TOKEN_RANGE_MASK ((1 << METHOD_TOKEN_RANGE_BIT_COUNT) - 1)

//=============================================================
// Splits methoddef token into two pieces for
// storage inside a methoddesc.
//=============================================================
FORCEINLINE UINT16 GetTokenRange(mdToken tok)
{
    LIMITED_METHOD_CONTRACT;
    return (UINT16)((tok>>METHOD_TOKEN_REMAINDER_BIT_COUNT) & METHOD_TOKEN_RANGE_MASK);
}

FORCEINLINE VOID SplitToken(mdToken tok, UINT16 *ptokrange, UINT16 *ptokremainder)
{
    LIMITED_METHOD_CONTRACT;
    *ptokrange = (UINT16)((tok>>METHOD_TOKEN_REMAINDER_BIT_COUNT) & METHOD_TOKEN_RANGE_MASK);
    *ptokremainder = (UINT16)(tok & METHOD_TOKEN_REMAINDER_MASK);
}

FORCEINLINE mdToken MergeToken(UINT16 tokrange, UINT16 tokremainder)
{
    LIMITED_METHOD_DAC_CONTRACT;
    return (tokrange << METHOD_TOKEN_REMAINDER_BIT_COUNT) | tokremainder | mdtMethodDef;
}

// The MethodDesc is a union of several types. The following
// 3-bit field determines which type it is. Note that JIT'ed/non-JIT'ed
// is not represented here because this isn't known until the
// method is executed for the first time. Because any thread could
// change this bit, it has to be done in a place where access is
// synchronized.

// **** NOTE: if you add any new flags, make sure you add them to ClearFlagsOnUpdate
// so that when a method is replaced its relevant flags are updated

// Used in MethodDesc
enum MethodClassification
{
    mcIL        = 0, // IL
    mcFCall     = 1, // FCall (also includes tlbimped ctor, Delegate ctor)
    mcNDirect   = 2, // N/Direct
    mcEEImpl    = 3, // special method; implementation provided by EE (like Delegate Invoke)
    mcArray     = 4, // Array ECall
    mcInstantiated = 5, // Instantiated generic methods, including descriptors
                        // for both shared and unshared code (see InstantiatedMethodDesc)

#ifdef FEATURE_COMINTEROP 
    // This needs a little explanation.  There are MethodDescs on MethodTables
    // which are Interfaces.  These have the mdcInterface bit set.  Then there
    // are MethodDescs on MethodTables that are Classes, where the method is
    // exposed through an interface.  These do not have the mdcInterface bit set.
    //
    // So, today, a dispatch through an 'mdcInterface' MethodDesc is either an
    // error (someone forgot to look up the method in a class' VTable) or it is
    // a case of COM Interop.

    mcComInterop    = 6,
#endif // FEATURE_COMINTEROP
    mcDynamic       = 7, // for method desc with no metadata behind
    mcCount,
};


// All flags in the MethodDesc now reside in a single 16-bit field.

enum MethodDescClassification
{
    // Method is IL, FCall etc., see MethodClassification above.
    mdcClassification                   = 0x0007,
    mdcClassificationCount              = mdcClassification+1,

    // Note that layout of code:MethodDesc::s_ClassificationSizeTable depends on the exact values 
    // of mdcHasNonVtableSlot and mdcMethodImpl

    // Has local slot (vs. has real slot in MethodTable)
    mdcHasNonVtableSlot                 = 0x0008,

    // Method is a body for a method impl (MI_MethodDesc, MI_NDirectMethodDesc, etc)
    // where the function explicitly implements IInterface.foo() instead of foo().
    mdcMethodImpl                       = 0x0010,

    // Method is static
    mdcStatic                           = 0x0020,

    // unused                           = 0x0040,
    // unused                           = 0x0080,
    // unused                           = 0x0100,
    // unused                           = 0x0200,

    // Duplicate method. When a method needs to be placed in multiple slots in the
    // method table, because it could not be packed into one slot. For eg, a method
    // providing implementation for two interfaces, MethodImpl, etc
    mdcDuplicate                        = 0x0400,

    // Has this method been verified?
    mdcVerifiedState                    = 0x0800,

    // Is the method verifiable? It needs to be verified first to determine this
    mdcVerifiable                       = 0x1000,

    // Is this method ineligible for inlining?
    mdcNotInline                        = 0x2000,

    // Is the method synchronized
    mdcSynchronized                     = 0x4000,

    // Does the method's slot number require all 16 bits
    mdcRequiresFullSlotNumber           = 0x8000
};

#define METHOD_MAX_RVA                          0x7FFFFFFF


// The size of this structure needs to be a multiple of MethodDesc::ALIGNMENT
//
// @GENERICS:
// Method descriptors for methods belonging to instantiated types may be shared between compatible instantiations
// Hence for reflection and elsewhere where exact types are important it's necessary to pair a method desc
// with the exact owning type handle.
//
// See genmeth.cpp for details of instantiated generic method descriptors.
// 
// A MethodDesc is the representation of a method of a type.  These live in code:MethodDescChunk which in
// turn lives in code:EEClass.   They are conceptually cold (we do not expect to access them in normal
// program exectution, but we often fall short of that goal.  
// 
// A Method desc knows how to get at its metadata token code:GetMemberDef, its chunk
// code:MethodDescChunk, which in turns knows how to get at its type code:MethodTable.
// It also knows how to get at its IL code (code:IMAGE_COR_ILMETHOD)
class MethodDesc
{
    friend class EEClass;
    friend class MethodTableBuilder;
    friend class ArrayClass;
    friend class NDirect;
    friend class MethodDescChunk;
    friend class InstantiatedMethodDesc;
    friend class MethodImpl;
    friend class CheckAsmOffsets;
    friend class ClrDataAccess;

    friend class MethodDescCallSite;
#ifdef DACCESS_COMPILE
    friend class NativeImageDumper;
#endif

public:

#ifdef _WIN64
    static const int ALIGNMENT_SHIFT = 3;
#else
    static const int ALIGNMENT_SHIFT = 2;
#endif
    static const size_t ALIGNMENT = (1 << ALIGNMENT_SHIFT);
    static const size_t ALIGNMENT_MASK = (ALIGNMENT - 1);

#ifdef _DEBUG 

    // These are set only for MethodDescs but every time we want to use the debugger
    // to examine these fields, the code has the thing stored in a MethodDesc*.
    // So...
    LPCUTF8         m_pszDebugMethodName;
    LPCUTF8         m_pszDebugClassName;
    LPCUTF8         m_pszDebugMethodSignature;
    FixupPointer<PTR_MethodTable>   m_pDebugMethodTable;

    PTR_GCCoverageInfo m_GcCover;

#endif // _DEBUG

    inline BOOL HasStableEntryPoint()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (m_bFlags2 & enum_flag2_HasStableEntryPoint) != 0;
    }

    inline PCODE GetStableEntryPoint()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        _ASSERTE(HasStableEntryPoint());
        _ASSERTE(!IsVersionableWithVtableSlotBackpatch());

        return GetMethodEntryPoint();
    }

    void SetMethodEntryPoint(PCODE addr);
    BOOL SetStableEntryPointInterlocked(PCODE addr);

    BOOL HasTemporaryEntryPoint();
    PCODE GetTemporaryEntryPoint();

    void SetTemporaryEntryPoint(LoaderAllocator *pLoaderAllocator, AllocMemTracker *pamTracker);

    PCODE GetInitialEntryPointForCopiedSlot()
    {
        WRAPPER_NO_CONTRACT;

        if (IsVersionableWithVtableSlotBackpatch())
        {
            return GetTemporaryEntryPoint();
        }
        return GetMethodEntryPoint();
    }

    inline BOOL HasPrecode()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (m_bFlags2 & enum_flag2_HasPrecode) != 0;
    }

    inline Precode* GetPrecode()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        PRECONDITION(HasPrecode());
        Precode* pPrecode = Precode::GetPrecodeFromEntryPoint(GetStableEntryPoint());
        PREFIX_ASSUME(pPrecode != NULL);
        return pPrecode;
    }

    inline bool MayHavePrecode()
    {
        CONTRACTL
        {
            THROWS;
            GC_TRIGGERS;
            MODE_ANY;
        }
        CONTRACTL_END

        // Ideally, methods that will not have native code (!MayHaveNativeCode() == true) should not be versionable. Currently,
        // that is not the case, in some situations it was seen that 1/4 to 1/3 of versionable methods do not have native
        // code, though there is no significant overhead from this. MayHaveNativeCode() appears to be an expensive check to do
        // for each MethodDesc, even if it's done only once, and when it was attempted, at the time it was showing up noticeably
        // in startup performance profiles.
        //
        // In particular, methods versionable with vtable slot backpatch should not have a precode (in the sense HasPrecode()
        // must return false) even if they will not have native code.
        bool result = IsVersionableWithoutJumpStamp() ? IsVersionableWithPrecode() : !MayHaveNativeCode();
        _ASSERTE(!result || !IsVersionableWithVtableSlotBackpatch());
        return result;
    }

    void InterlockedUpdateFlags2(BYTE bMask, BOOL fSet);

    Precode* GetOrCreatePrecode();

#ifdef FEATURE_PREJIT
    Precode *     GetSavedPrecode(DataImage *image);
    Precode *     GetSavedPrecodeOrNull(DataImage *image);
#endif // FEATURE_PREJIT

    // Given a code address return back the MethodDesc whenever possible
    // 
    static MethodDesc *  GetMethodDescFromStubAddr(PCODE addr, BOOL fSpeculative = FALSE);


    DWORD GetAttrs() const;

    DWORD GetImplAttrs();

    // This function can lie if a method impl was used to implement
    // more than one method on this class. Use GetName(int) to indicate
    // which slot you are interested in.
    // See the TypeString class for better control over name formatting.
    LPCUTF8 GetName();

    LPCUTF8 GetName(USHORT slot);

    void PrecomputeNameHash();
    BOOL MightHaveName(ULONG nameHashValue);

    FORCEINLINE LPCUTF8 GetNameOnNonArrayClass()
    {
        WRAPPER_NO_CONTRACT;
        LPCSTR  szName;
        if (FAILED(GetMDImport()->GetNameOfMethodDef(GetMemberDef(), &szName)))
        {
            szName = NULL;
        }
        return szName;
    }

    COUNT_T GetStableHash();

    // Non-zero for InstantiatedMethodDescs
    DWORD GetNumGenericMethodArgs();

    // Return the number of class type parameters that are in scope for this method
    DWORD GetNumGenericClassArgs()
    {
        WRAPPER_NO_CONTRACT;
        SUPPORTS_DAC;
        return GetMethodTable()->GetNumGenericArgs();
    }

    // True if this is a method descriptor for an instantiated generic method
    // whose method type arguments are the formal type parameters of the generic method
    // NOTE: the declaring class may not be the generic type definition e.g. consider C<int>.m<T>
    BOOL IsGenericMethodDefinition() const;

    // True if the declaring type or instantiation of method (if any) contains formal generic type parameters
    BOOL ContainsGenericVariables();

    Module* GetDefiningModuleForOpenMethod();

    // True if this is a class and method instantiation that on <__Canon,...,__Canon>
    BOOL IsTypicalSharedInstantiation();


    // True if and only if this is a method desriptor for :
    // 1. a non-generic method or a generic method at its typical method instantiation
    // 2. in a non-generic class or a typical instantiation of a generic class
    // This method can be called on a non-restored method desc
    BOOL IsTypicalMethodDefinition() const;

    // Force a load of the (typical) constraints on the type parameters of a typical method definition,
    // detecting cyclic bounds on class and method type parameters.
    void LoadConstraintsForTypicalMethodDefinition(BOOL *pfHasCircularClassConstraints,
                                                   BOOL *pfHasCircularMethodConstraints,
                                                   ClassLoadLevel level = CLASS_LOADED);

    DWORD IsClassConstructor()
    {
        WRAPPER_NO_CONTRACT;
        return IsMdClassConstructor(GetAttrs(), GetName());
    }

    DWORD IsClassConstructorOrCtor()
    {
        WRAPPER_NO_CONTRACT;
        DWORD dwAttrs = GetAttrs();
        if (IsMdRTSpecialName(dwAttrs))
        {
            LPCUTF8 name = GetName();
            return IsMdInstanceInitializer(dwAttrs, name) || IsMdClassConstructor(dwAttrs, name);
        }
        return FALSE;
    }

    inline void SetHasMethodImplSlot()
    {
        m_wFlags |= mdcMethodImpl;
    }

    inline BOOL HasMethodImplSlot()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (mdcMethodImpl & m_wFlags);
    }

    FORCEINLINE BOOL IsMethodImpl()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        // Once we stop allocating dummy MethodImplSlot in MethodTableBuilder::WriteMethodImplData,
        // the check for NULL will become unnecessary.
        return HasMethodImplSlot() && (GetMethodImpl()->GetSlots() != NULL);
    }

    inline DWORD IsStatic()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        // This bit caches the IsMdStatic(GetAttrs()) check. We used to assert it here, but not doing it anymore. GetAttrs() 
        // accesses metadata that is not compatible with contracts of this method. The metadata access can fail, the metadata 
        // are not available during shutdown, the metadata access can take locks. It is not worth it to code around all these 
        // just for the assert.
        // _ASSERTE((((m_wFlags & mdcStatic) != 0) == (IsMdStatic(flags) != 0)));

        return (m_wFlags & mdcStatic) != 0;
    }

    inline void SetStatic()
    {
        LIMITED_METHOD_CONTRACT;
        m_wFlags |= mdcStatic;
    }

    inline void ClearStatic()
    {
        LIMITED_METHOD_CONTRACT;
        m_wFlags &= ~mdcStatic;
    }

    inline BOOL IsIL()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return mcIL == GetClassification()  || mcInstantiated == GetClassification();
    }

    //================================================================
    // Generics-related predicates etc.

    // True if the method descriptor is an instantiation of a generic method.
    inline BOOL HasMethodInstantiation() const;

    // True if the method descriptor is either an instantiation of
    // a generic method or is an instance method in an instantiated class (or both).
    BOOL HasClassOrMethodInstantiation()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (HasClassInstantiation() || HasMethodInstantiation());
    }

    BOOL HasClassOrMethodInstantiation_NoLogging() const
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (HasClassInstantiation_NoLogging() || HasMethodInstantiation());
    }

    inline BOOL HasClassInstantiation() const 
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return GetMethodTable()->HasInstantiation();
    }

    inline BOOL HasClassInstantiation_NoLogging() const
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return GetMethodTable_NoLogging()->HasInstantiation();
    }

    // Return the instantiation for an instantiated generic method
    // Return NULL if not an instantiated method
    // To get the (representative) instantiation of the declaring class use GetMethodTable()->GetInstantiation()
    // NOTE: This will assert if you try to get the instantiation of a generic method def in a non-typical class
    // e.g. C<int>.m<U> will fail but C<T>.m<U> will succeed
    Instantiation GetMethodInstantiation() const;

    // As above, but will succeed on C<int>.m<U>
    // To do this it might force a load of the typical parent
    Instantiation LoadMethodInstantiation();

    // Return a pointer to the method dictionary for an instantiated generic method
    // The initial slots in a method dictionary are the type arguments themselves
    // Return NULL if not an instantiated method
    Dictionary* GetMethodDictionary();
    DictionaryLayout* GetDictionaryLayout();

    InstantiatedMethodDesc* AsInstantiatedMethodDesc() const;

    BaseDomain *GetDomain();

#ifdef FEATURE_CODE_VERSIONING
    CodeVersionManager* GetCodeVersionManager();
#endif
#ifdef FEATURE_TIERED_COMPILATION
    CallCounter* GetCallCounter();
#endif

#ifndef CROSSGEN_COMPILE
    MethodDescBackpatchInfoTracker* GetBackpatchInfoTracker();
#endif

    PTR_LoaderAllocator GetLoaderAllocator();

    // GetDomainSpecificLoaderAllocator returns the collectable loader allocator for collectable types
    // and the loader allocator in the current domain for non-collectable types
    LoaderAllocator * GetDomainSpecificLoaderAllocator();

    Module* GetLoaderModule();

    Module* GetZapModule();

    // Does this immediate item live in an NGEN module?
    BOOL IsZapped();

    // Strip off method and class instantiation if present and replace by the typical instantiation
    // e.g. C<int>.m<string> -> C<T>.m<U>.  Does not modify the MethodDesc, but returns
    // the appropriate stripped MethodDesc.
    // This is the identity function on non-instantiated method descs in non-instantiated classes
    MethodDesc* LoadTypicalMethodDefinition();

    // Strip off the method instantiation (if present) and replace by the typical instantiation
    // e.g. // C<int>.m<string> -> C<int>.m<U>.   Does not modify the MethodDesc, but returns
    // the appropriate stripped MethodDesc.
    // This is the identity function on non-instantiated method descs
    MethodDesc* StripMethodInstantiation();

    // Return the instantiation of a method's enclosing class
    // Return NULL if the enclosing class is not instantiated
    // If the method code is shared then this might be a *representative* instantiation
    //
    // See GetExactClassInstantiation if you need to get the exact
    // instantiation of a shared method desc.
    Instantiation GetClassInstantiation() const;

    // Is the code shared between multiple instantiations of class or method?
    // If so, then when compiling the code we might need to look up tokens
    // in the class or method dictionary.  Also, when debugging the exact generic arguments
    // need to be ripped off the stack, either from the this pointer or from one of the
    // extra args below.
    BOOL IsSharedByGenericInstantiations(); // shared code of any kind

    BOOL IsSharedByGenericMethodInstantiations(); // shared due to method instantiation

    // How does a method shared between generic instantiations get at
    // the extra instantiation information at runtime?  Only one of the following three
    // will ever hold:
    //
    // AcquiresInstMethodTableFromThis()
    //    The method is in a generic class but is not itself a
    // generic method (the normal case). Furthermore a "this" pointer
    // is available and we can get the exact instantiation from it.
    //
    // RequiresInstMethodTableArg()
    //    The method is shared between generic classes but is not
    // itself generic.  Furthermore no "this" pointer is given
    // (e.g. a value type method), so we pass in the exact-instantiation
    // method table as an extra argument.
    //   i.e. per-inst static methods in shared-code instantiated generic
    //        classes (e.g. static void MyClass<string>::m())
    //   i.e. shared-code instance methods in instantiated generic
    //        structs (e.g. void MyValueType<string>::m())
    //
    // RequiresInstMethodDescArg()
    //    The method is itself generic and is shared between generic
    // instantiations but is not itself generic.  Furthermore
    // no "this" pointer is given (e.g. a value type method), so we pass in the
    // exact-instantiation method table as an extra argument.
    //   i.e. shared-code instantiated generic methods
    //
    // These are used for direct calls to instantiated generic methods
    //     e.g. call void C::m<string>()  implemented by calculating dict(m<string>) at compile-time and passing it as an extra parameter
    //          call void C::m<!0>()      implemented by calculating dict(m<!0>) at run-time (if the caller lives in shared-class code)

    BOOL AcquiresInstMethodTableFromThis();
    BOOL RequiresInstMethodTableArg();
    BOOL RequiresInstMethodDescArg();
    BOOL RequiresInstArg();

    // Can this method handle be given out to reflection for use in a MethodInfo
    // object?
    BOOL IsRuntimeMethodHandle();

    // Given a method table of an object and a method that comes from some
    // superclass of the class of that object, find that superclass.
    MethodTable * GetExactDeclaringType(MethodTable * ownerOrSubType);

    // Given a type handle of an object and a method that comes from some
    // superclass of the class of that object, find the instantiation of
    // that superclass, i.e. the class instantiation which will be relevant
    // to interpreting the signature of the method.  The type handle of
    // the object does not need to be given in all circumstances, in
    // particular it is only needed for MethodDescs pMD that
    // return true for pMD->RequiresInstMethodTableArg() or
    // pMD->RequiresInstMethodDescArg(). In other cases it is
    // allowed to be null.
    //
    // Will return NULL if the method is not in a generic class.
    Instantiation GetExactClassInstantiation(TypeHandle possibleObjType);


    BOOL SatisfiesMethodConstraints(TypeHandle thParent, BOOL fThrowIfNotSatisfied = FALSE);


    BOOL HasSameMethodDefAs(MethodDesc * pMD);

    //================================================================
    // Classifications of kinds of MethodDescs.

    inline BOOL IsRuntimeSupplied()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return mcFCall == GetClassification()
            || mcArray == GetClassification();
    }


    inline DWORD IsArray() const
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return mcArray == GetClassification();
    }

    inline DWORD IsEEImpl() const
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return mcEEImpl == GetClassification();
    }

    inline DWORD IsNoMetadata() const
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (mcDynamic == GetClassification());
    }

    inline PTR_DynamicMethodDesc AsDynamicMethodDesc();
    inline bool IsDynamicMethod();
    inline bool IsILStub();
    inline bool IsLCGMethod();

    inline DWORD IsNDirect()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return mcNDirect == GetClassification();
    }

    inline DWORD IsInterface()
    {
        WRAPPER_NO_CONTRACT;
        return GetMethodTable()->IsInterface();
    }

    void ComputeSuppressUnmanagedCodeAccessAttr(IMDInternalImport *pImport);
    BOOL HasNativeCallableAttribute();

#ifdef FEATURE_COMINTEROP 
    inline DWORD IsComPlusCall()
    {
        WRAPPER_NO_CONTRACT;
        return mcComInterop == GetClassification();
    }
    inline DWORD IsGenericComPlusCall();
    inline void SetupGenericComPlusCall();
#else // !FEATURE_COMINTEROP
     // hardcoded to return FALSE to improve code readibility
    inline DWORD IsComPlusCall()
    {
        LIMITED_METHOD_CONTRACT;
        return FALSE;
    }
    inline DWORD IsGenericComPlusCall()
    {
        LIMITED_METHOD_CONTRACT;
        return FALSE;
    }
#endif // !FEATURE_COMINTEROP

    // Update flags in a thread safe manner.
    WORD InterlockedUpdateFlags(WORD wMask, BOOL fSet);

    // If the method is in an Edit and Contine (EnC) module, then
    // we DON'T want to backpatch this, ever.  We MUST always call
    // through the precode so that we can update the method.
    inline DWORD IsEnCMethod()
    {
        WRAPPER_NO_CONTRACT;
        Module *pModule = GetModule();
        PREFIX_ASSUME(pModule != NULL);
        return pModule->IsEditAndContinueEnabled();
    }

    inline BOOL IsNotInline()
    {
        LIMITED_METHOD_CONTRACT;
        return (m_wFlags & mdcNotInline);
    }

    inline void SetNotInline(BOOL set)
    {
        WRAPPER_NO_CONTRACT;
        InterlockedUpdateFlags(mdcNotInline, set);
    }

#ifndef DACCESS_COMPILE
    VOID EnsureActive();
#endif
    CHECK CheckActivated();

    //================================================================
    // FCalls.
    BOOL IsFCall()
    {
        WRAPPER_NO_CONTRACT;
        return mcFCall == GetClassification();
    }

    BOOL IsFCallOrIntrinsic();

    BOOL IsQCall();

    //================================================================
    //

    inline void ClearFlagsOnUpdate()
    {
        WRAPPER_NO_CONTRACT;
        SetNotInline(FALSE);
    }

    // Restore the MethodDesc to it's initial, pristine state, so that
    // it can be reused for new code (eg. for EnC, method rental, etc.)
    //
    // Things to think about before calling this:
    //
    // Does the caller need to free up the jitted code for the old IL
    // (including any other IJitManager datastructures) ?
    // Does the caller guarantee thread-safety ?
    //
    void Reset();

    //================================================================
    // About the signature.

    BOOL IsVarArg();
    BOOL IsVoid();
    BOOL HasRetBuffArg();

    // Returns the # of bytes of stack used by arguments. Does not include
    // arguments passed in registers.
    UINT SizeOfArgStack();

    // Returns the # of bytes of stack used by arguments in a call from native to this function.
    // Does not include arguments passed in registers.
    UINT SizeOfNativeArgStack();

    // Returns the # of bytes to pop after a call. Not necessary the
    // same as SizeOfArgStack()!
    UINT CbStackPop();

    //================================================================
    // Unboxing stubs.
    //
    // Return TRUE if this is this a special stub used to implement delegates to an
    // instance method in a value class and/or virtual methods on a value class.
    //
    // For every BoxedEntryPointStub there is associated unboxed-this-MethodDesc
    // which accepts an unboxed "this" pointer.
    //
    // The action of a typical BoxedEntryPointStub is to
    // bump up the this pointer by one word so that it points to the interior of the object
    // and then call the underlying unboxed-this-MethodDesc.
    //
    // Additionally, if the non-BoxedEntryPointStub is RequiresInstMethodTableArg()
    // then pass on the MethodTable as an extra argument to the
    // underlying unboxed-this-MethodDesc.
    BOOL IsUnboxingStub()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (m_bFlags2 & enum_flag2_IsUnboxingStub) != 0;
    }

    void SetIsUnboxingStub()
    {    
        LIMITED_METHOD_CONTRACT;
        m_bFlags2 |= enum_flag2_IsUnboxingStub;
    }


    //================================================================
    // Instantiating Stubs
    //
    // Return TRUE if this is this a special stub used to implement an
    // instantiated generic method or per-instantiation static method.
    // The action of an instantiating stub is
    // * pass on a MethodTable or InstantiatedMethodDesc extra argument to shared code
    BOOL IsInstantiatingStub();


    // A wrapper stub is either an unboxing stub or an instantiating stub
    BOOL IsWrapperStub();
    MethodDesc *GetWrappedMethodDesc();
    MethodDesc *GetExistingWrappedMethodDesc();

    //==================================================================
    // Access the underlying metadata

    BOOL HasILHeader()
    {
        CONTRACTL
        {
            NOTHROW;
            GC_NOTRIGGER;
            MODE_ANY;
        }
        CONTRACTL_END;
        return IsIL() && !IsUnboxingStub() && GetRVA();
    }

    COR_ILMETHOD* GetILHeader(BOOL fAllowOverrides = FALSE);

    BOOL HasStoredSig()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return IsEEImpl() || IsArray() || IsNoMetadata();
    }

    PCCOR_SIGNATURE GetSig();

    void GetSig(PCCOR_SIGNATURE *ppSig, DWORD *pcSig);
    SigParser GetSigParser();

    // Convenience methods for common signature wrapper types.
    SigPointer GetSigPointer();
    Signature GetSignature();
    

    void GetSigFromMetadata(IMDInternalImport * importer, 
                            PCCOR_SIGNATURE   * ppSig, 
                            DWORD             * pcSig);


    IMDInternalImport* GetMDImport() const
    {
        WRAPPER_NO_CONTRACT;
        Module *pModule = GetModule();
        PREFIX_ASSUME(pModule != NULL);
        return pModule->GetMDImport();
    }

    HRESULT GetCustomAttribute(WellKnownAttribute attribute,
                               const void  **ppData,
                               ULONG *pcbData) const
    {
        WRAPPER_NO_CONTRACT;
        Module *pModule = GetModule();
        PREFIX_ASSUME(pModule != NULL);
        return pModule->GetCustomAttribute(GetMemberDef(), attribute, ppData, pcbData);
    }

#ifndef DACCESS_COMPILE 
    IMetaDataEmit* GetEmitter()
    {
        WRAPPER_NO_CONTRACT;
        Module *pModule = GetModule();
        PREFIX_ASSUME(pModule != NULL);
        return pModule->GetEmitter();
    }

    IMetaDataImport* GetRWImporter()
    {
        WRAPPER_NO_CONTRACT;
        Module *pModule = GetModule();
        PREFIX_ASSUME(pModule != NULL);
        return pModule->GetRWImporter();
    }
#endif // !DACCESS_COMPILE

#ifdef FEATURE_COMINTEROP 
    WORD GetComSlot();
    LONG GetComDispid();
#endif // FEATURE_COMINTEROP

    inline DWORD IsCtor()
    {
        WRAPPER_NO_CONTRACT;
        return IsMdInstanceInitializer(GetAttrs(), GetName());
    }

    inline DWORD IsFinal()
    {
        WRAPPER_NO_CONTRACT;
        return IsMdFinal(GetAttrs());
    }

    inline DWORD IsPrivate()
    {
        WRAPPER_NO_CONTRACT;
        return IsMdPrivate(GetAttrs());
    }

    inline DWORD IsPublic() const
    {
        WRAPPER_NO_CONTRACT;
        return IsMdPublic(GetAttrs());
    }

    inline DWORD IsProtected() const
    {
        WRAPPER_NO_CONTRACT;
        return IsMdFamily(GetAttrs());
    }

    inline DWORD IsVirtual()
    {
        WRAPPER_NO_CONTRACT;
        return IsMdVirtual(GetAttrs());
    }

    inline DWORD IsAbstract()
    {
        WRAPPER_NO_CONTRACT;
        return IsMdAbstract(GetAttrs());
    }

    //==================================================================
    // Flags..

    inline void SetSynchronized()
    {
        LIMITED_METHOD_CONTRACT;
        m_wFlags |= mdcSynchronized;
    }

    inline DWORD IsSynchronized()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (m_wFlags & mdcSynchronized) != 0;
    }

    // Be careful about races with profiler when using this method. The profiler can 
    // replace preimplemented code of the method with jitted code.
    // Avoid code patterns like if(IsPreImplemented()) { PCODE pCode = GetPreImplementedCode(); ... }.
    // Use PCODE pCode = GetPreImplementedCode(); if (pCode != NULL) { ... } instead.
    BOOL IsPreImplemented()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return GetPreImplementedCode() != NULL;
    }

    //==================================================================
    // The MethodDesc in relation to the VTable it is associated with.
    // WARNING: Not all MethodDescs have slots, nor do they all have
    // entries in MethodTables.  Beware.

    // Does the method has virtual slot? Note that methods implementing interfaces
    // on value types do not have virtual slots, but they are marked as virtual in metadata.
    inline BOOL IsVtableMethod()
    {
        LIMITED_METHOD_CONTRACT;
        MethodTable *pMT = GetMethodTable();
        g_IBCLogger.LogMethodTableAccess(pMT);
        return
            !IsEnCAddedMethod()
            // The slot numbers are currently meaningless for
            // some unboxed-this-generic-method-instantiations
            && !(pMT->IsValueType() && !IsStatic() && !IsUnboxingStub())
            && GetSlot() < pMT->GetNumVirtuals();
    }

    // Is this a default interface method (virtual non-abstract instance method)
    inline BOOL IsDefaultInterfaceMethod()
    {
        LIMITED_METHOD_CONTRACT;

#ifdef FEATURE_DEFAULT_INTERFACES
        return (GetMethodTable()->IsInterface() && !IsStatic() && IsVirtual() && !IsAbstract());
#else
        return false;
#endif // FEATURE_DEFAULT_INTERFACES
    }

    inline BOOL HasNonVtableSlot();

    void SetHasNonVtableSlot()
    {
        LIMITED_METHOD_CONTRACT;
        m_wFlags |= mdcHasNonVtableSlot;
    }

    // duplicate methods
    inline BOOL  IsDuplicate()
    {
        LIMITED_METHOD_CONTRACT;
        return (m_wFlags & mdcDuplicate) == mdcDuplicate;
    }

    void SetDuplicate()
    {
        LIMITED_METHOD_CONTRACT;
        // method table is not setup yet
        //_ASSERTE(!GetClass()->IsInterface());
        m_wFlags |= mdcDuplicate;
    }

    //==================================================================
    // EnC

    inline BOOL IsEnCAddedMethod();

    //==================================================================
    //

    inline EEClass* GetClass()
    {
        WRAPPER_NO_CONTRACT;
        MethodTable *pMT = GetMethodTable_NoLogging();
        g_IBCLogger.LogEEClassAndMethodTableAccess(pMT);
        EEClass *pClass = pMT->GetClass_NoLogging();
        PREFIX_ASSUME(pClass != NULL);
        return pClass;
    }

    inline PTR_MethodTable GetMethodTable() const;
    inline PTR_MethodTable GetMethodTable_NoLogging() const;

    inline DPTR(RelativeFixupPointer<PTR_MethodTable>) GetMethodTablePtr() const;

  public:
    inline MethodDescChunk* GetMethodDescChunk() const;
    inline int GetMethodDescIndex() const;
    // If this is an method desc. (whether non-generic shared-instantiated or exact-instantiated)
    // inside a shared class then get the method table for the representative
    // class.
    inline MethodTable* GetCanonicalMethodTable();

    Module *GetModule() const;
    Module *GetModule_NoLogging() const;

    Assembly *GetAssembly() const
    {
        WRAPPER_NO_CONTRACT;
        Module *pModule = GetModule();
        PREFIX_ASSUME(pModule != NULL);
        return pModule->GetAssembly();
    }

    //==================================================================
    // The slot number of this method in the corresponding method table.
    //
    // Use with extreme caution.  The slot number will not be
    // valid for EnC code or for MethodDescs representing instantiation
    // of generic methods.  It may also not mean what you think it will mean
    // for strange method descs such as BoxedEntryPointStubs.
    //
    // In any case we should be moving to use slot numbers a lot less
    // since they make the EE code inflexible.

    inline WORD GetSlot()
    {
        LIMITED_METHOD_DAC_CONTRACT;
#ifndef DACCESS_COMPILE
        // The DAC build uses this method to test for "sanity" of a MethodDesc, and
        // doesn't need the assert.
        _ASSERTE(! IsEnCAddedMethod() || !"Cannot get slot for method added via EnC");
#endif // !DACCESS_COMPILE

        // Check if this MD is using the packed slot layout
        if (!RequiresFullSlotNumber())
        {
            return (m_wSlotNumber & enum_packedSlotLayout_SlotMask);
        }

        return m_wSlotNumber;
    }

    inline VOID SetSlot(WORD wSlotNum)
    {
        LIMITED_METHOD_CONTRACT;

        // Check if we have to avoid using the packed slot layout
        if (wSlotNum > enum_packedSlotLayout_SlotMask)
        {
            SetRequiresFullSlotNumber();
        }

        // Set only the portion of m_wSlotNumber we are using
        if (!RequiresFullSlotNumber())
        {
            m_wSlotNumber &= ~enum_packedSlotLayout_SlotMask;
            m_wSlotNumber |= wSlotNum;
        }
        else
        {
            m_wSlotNumber = wSlotNum;
        }
    }

    inline BOOL IsVirtualSlot()
    {
        return GetSlot() < GetMethodTable()->GetNumVirtuals();
    }
    inline BOOL IsVtableSlot()
    {
        return IsVirtualSlot() && !HasNonVtableSlot();
    }

    TADDR GetAddrOfSlot();

    PTR_MethodDesc GetDeclMethodDesc(UINT32 slotNumber);

protected:
    inline void SetRequiresFullSlotNumber()
    {
        LIMITED_METHOD_CONTRACT;
        m_wFlags |= mdcRequiresFullSlotNumber;
    }

    inline DWORD RequiresFullSlotNumber()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (m_wFlags & mdcRequiresFullSlotNumber) != 0;
    }

public:
    mdMethodDef GetMemberDef() const;
    mdMethodDef GetMemberDef_NoLogging() const;

#ifdef _DEBUG 
    BOOL SanityCheck();
#endif // _DEBUG

public:

    void SetMemberDef(mdMethodDef mb);

    //================================================================
    // Set the offset of this method desc in a chunk table (which allows us
    // to work back to the method table/module pointer stored at the head of
    // the table.
    void SetChunkIndex(MethodDescChunk *pChunk);

    BOOL IsPointingToPrestub();

public:

    // True iff it is possible to change the code this method will run using the CodeVersionManager. Note: EnC currently returns
    // false here because it uses its own seperate scheme to manage versionability. We will likely want to converge them at some
    // point.
    bool IsVersionable()
    {
        WRAPPER_NO_CONTRACT;
        return IsVersionableWithoutJumpStamp() || IsVersionableWithJumpStamp();
    }

    // True iff this method's code may be versioned using a technique other than JumpStamp
    bool IsVersionableWithoutJumpStamp()
    {
        WRAPPER_NO_CONTRACT;

#ifdef FEATURE_CODE_VERSIONING
        return IsEligibleForTieredCompilation();
#else
        return false;
#endif
    }

    // True iff all calls to the method should funnel through a Precode which can be updated to point to the current method
    // body. This versioning technique can introduce more indirections than optimal but it has low memory overhead when a
    // FixupPrecode may be shared with the temporary entry point that is created anyway.
    bool IsVersionableWithPrecode()
    {
        WRAPPER_NO_CONTRACT;
        return IsVersionableWithoutJumpStamp() && !Helper_IsEligibleForVersioningWithVtableSlotBackpatch();
    }

    // True iff all calls to the method should go through a backpatchable vtable slot or through a FuncPtrStub. This versioning
    // technique eliminates extra indirections from precodes but is more memory intensive to track all the appropriate slots.
    // See Helper_IsEligibleForVersioningWithEntryPointSlotBackpatch() for more details.
    bool IsVersionableWithVtableSlotBackpatch()
    {
        WRAPPER_NO_CONTRACT;
        return IsVersionableWithoutJumpStamp() && Helper_IsEligibleForVersioningWithVtableSlotBackpatch();
    }

    // True iff All calls to the method go to the default code and the prologue of that code will be overwritten with a jmp to
    // other code if necessary. This is the only technique that can handle NGEN'ed code that embeds untracked direct calls
    // between methods. It has much higher update overhead than other approaches because it needs runtime suspension to evacuate
    // all threads from method prologues before a prologue can be patched. The patching is also not compatible with a debugger
    // that may be trying to rewrite the same code bytes to add/remove a breakpoint.
    bool IsVersionableWithJumpStamp()
    {
        WRAPPER_NO_CONTRACT;

#if defined(FEATURE_CODE_VERSIONING) && defined(FEATURE_JUMPSTAMP)
        return
            // Functional requirement / policy - Only one versioning technique may be used for a method, and versioning without
            // a jump stamp is preferred
            !IsVersionableWithoutJumpStamp() &&

            // Functional requirement - If we aren't doing tiered compilation, ReJIT is currently the only other reason to make
            // methods versionable. ReJIT is required to work even in NGEN images where the other versioning techniques aren't
            // supported. If both ReJIT and tiered compilation are enabled then we prefer using the Precode or
            // EntryPointSlotBackpatch techniques because they offer lower overhead method update performance and don't
            // interfere with the debugger.
            ReJitManager::IsReJITEnabled() &&

            // Functional requirement - We must be able to evacuate the prolog and the prolog must be big enough, both of which
            // are only designed to work on jitted code
            (IsIL() || IsNoMetadata()) &&
            !IsWrapperStub() &&

            // Functional requirement
            CodeVersionManager::IsMethodSupported(PTR_MethodDesc(this));
#else
        return false;
#endif
    }

public:

    bool IsEligibleForTieredCompilation()
    {
        LIMITED_METHOD_DAC_CONTRACT;

#ifdef FEATURE_TIERED_COMPILATION
        return (m_bFlags2 & enum_flag2_IsEligibleForTieredCompilation) != 0;
#else
        return false;
#endif
    }

    // Is this method allowed to be recompiled and the entrypoint redirected so that we
    // can optimize its performance? Eligibility is invariant for the lifetime of a method.
    bool DetermineAndSetIsEligibleForTieredCompilation();

    bool IsJitOptimizationDisabled();

private:
    // This function is not intended to be called in most places, and is named as such to discourage calling it accidentally
    bool Helper_IsEligibleForVersioningWithVtableSlotBackpatch()
    {
        WRAPPER_NO_CONTRACT;
        _ASSERTE(IsVersionableWithoutJumpStamp());
        _ASSERTE(IsIL() || IsDynamicMethod());

#if defined(FEATURE_CODE_VERSIONING) && !defined(CROSSGEN_COMPILE)
        _ASSERTE(CodeVersionManager::IsMethodSupported(PTR_MethodDesc(this)));

        // For a method eligible for code versioning and vtable slot backpatch:
        //   - It does not have a precode (HasPrecode() returns false)
        //   - It does not have a stable entry point (HasStableEntryPoint() returns false)
        //   - A call to the method may be:
        //     - An indirect call through the MethodTable's backpatchable vtable slot
        //     - A direct call to a backpatchable FuncPtrStub, perhaps through a JumpStub
        //     - For interface methods, an indirect call through the virtual stub dispatch (VSD) indirection cell to a
        //       backpatchable DispatchStub or a ResolveStub that refers to a backpatchable ResolveCacheEntry
        //   - The purpose is that typical calls to the method have no additional overhead when code versioning is enabled
        //
        // Recording and backpatching slots:
        //   - In order for all vtable slots for the method to be backpatchable:
        //     - A vtable slot initially points to the MethodDesc's temporary entry point, even when the method is inherited by
        //       a derived type (the slot's value is not copied from the parent)
        //     - The temporary entry point always points to the prestub and is never backpatched, in order to be able to
        //       discover new vtable slots through which the method may be called
        //     - The prestub, as part of DoBackpatch(), records any slots that are transitioned from the temporary entry point
        //       to the method's at-the-time current, non-prestub entry point
        //     - Any further changes to the method's entry point cause recorded slots to be backpatched in
        //       BackpatchEntryPointSlots()
        //   - In order for the FuncPtrStub to be backpatchable:
        //     - After the FuncPtrStub is created and exposed, it is patched to point to the method's at-the-time current entry
        //       point if necessary
        //     - Any further changes to the method's entry point cause the FuncPtrStub to be backpatched in
        //       BackpatchEntryPointSlots()
        //   - In order for VSD entities to be backpatchable:
        //     - A DispatchStub's entry point target is aligned and recorded for backpatching in BackpatchEntryPointSlots()
        //     - A ResolveCacheEntry's entry point target is recorded for backpatching in BackpatchEntryPointSlots()
        //
        // Slot lifetime and management of recorded slots:
        //   - A slot is recorded in the LoaderAllocator in which the slot is allocated, see
        //     RecordAndBackpatchEntryPointSlot()
        //   - An inherited slot that has a shorter lifetime than the MethodDesc, when recorded, needs to be accessible by the
        //     MethodDesc for backpatching, so the dependent LoaderAllocator with the slot to backpatch is also recorded in the
        //     MethodDesc's LoaderAllocator, see
        //     MethodDescBackpatchInfo::AddDependentLoaderAllocator_Locked()
        //   - At the end of a LoaderAllocator's lifetime, the LoaderAllocator is unregistered from dependency LoaderAllocators,
        //     see MethodDescBackpatchInfoTracker::ClearDependencyMethodDescEntryPointSlots()
        //   - When a MethodDesc's entry point changes, backpatching also includes iterating over recorded dependent
        //     LoaderAllocators to backpatch the relevant slots recorded there, see BackpatchEntryPointSlots()
        //
        // Synchronization between entry point changes and backpatching slots
        //   - A global lock is used to ensure that all recorded backpatchable slots corresponding to a MethodDesc point to the
        //     same entry point, see DoBackpatch() and BackpatchEntryPointSlots() for examples
        //
        // Typical slot value transitions when tiered compilation is enabled:
        //   - Initially, the slot contains the method's temporary entry point, which always points to the prestub (see above)
        //   - After the tier 0 JIT completes, the slot is transitioned to the tier 0 entry point, and the slot is recorded for
        //     backpatching
        //   - When tiered compilation decides to begin counting calls for the method, the slot is transitioned to the temporary
        //     entry point (call counting currently happens in the prestub)
        //   - When the call count reaches the tier 1 threshold, the slot is transitioned to the tier 0 entry point and a tier 1
        //     JIT is scheduled
        //   - After the tier 1 JIT completes, the slot is transitioned to the tier 1 entry point

        return
            // Policy
            g_pConfig->BackpatchEntryPointSlots() &&

            // Functional requirement - The entry point must be through a vtable slot in the MethodTable that may be recorded
            // and backpatched
            IsVtableSlot() &&

            // Functional requirement - True interface methods are not backpatched, see DoBackpatch()
            !(IsInterface() && !IsStatic());
#else
        // Entry point slot backpatch is disabled for CrossGen
        return false;
#endif
    }

public:
    bool MayHaveEntryPointSlotsToBackpatch()
    {
        WRAPPER_NO_CONTRACT;

#ifndef CROSSGEN_COMPILE
        // This is the only case currently. In the future, a method that does not have a vtable slot may still record entry
        // point slots that need to be backpatched on entry point change, and in such cases the conditions here may be changed.
        bool result = IsVersionableWithVtableSlotBackpatch();

        // Cases where this function returns true are not expected to need to handle JumpStamp versioning in the future
        _ASSERTE(!result || !IsVersionableWithJumpStamp());
        return result;
#else
        // Entry point slot backpatch is disabled for CrossGen
        return false;
#endif
    }

#ifndef CROSSGEN_COMPILE

private:
    // Gets the prestub entry point to use for backpatching. Entry point slot backpatch uses this entry point as an oracle to
    // determine if the entry point actually changed and warrants backpatching.
    PCODE GetPrestubEntryPointToBackpatch()
    {
        WRAPPER_NO_CONTRACT;
        _ASSERTE(MayHaveEntryPointSlotsToBackpatch());

        // At the moment this is the only case, see MayHaveEntryPointSlotsToBackpatch()
        _ASSERTE(IsVersionableWithVtableSlotBackpatch());
        return GetTemporaryEntryPoint();
    }

    // Gets the entry point stored in the primary storage location for backpatching. Entry point slot backpatch uses this entry
    // point as an oracle to determine if the entry point actually changed and warrants backpatching.
    PCODE GetEntryPointToBackpatch_Locked()
    {
        WRAPPER_NO_CONTRACT;
        _ASSERTE(MethodDescBackpatchInfoTracker::IsLockedByCurrentThread());
        _ASSERTE(MayHaveEntryPointSlotsToBackpatch());

        // At the moment this is the only case, see MayHaveEntryPointSlotsToBackpatch()
        _ASSERTE(IsVersionableWithVtableSlotBackpatch());
        return GetMethodEntryPoint();
    }

    // Sets the entry point stored in the primary storage location for backpatching. Entry point slot backpatch uses this entry
    // point as an oracle to determine if the entry point actually changed and warrants backpatching.
    void SetEntryPointToBackpatch_Locked(PCODE entryPoint)
    {
        WRAPPER_NO_CONTRACT;
        _ASSERTE(MethodDescBackpatchInfoTracker::IsLockedByCurrentThread());
        _ASSERTE(entryPoint != NULL);
        _ASSERTE(MayHaveEntryPointSlotsToBackpatch());

        // At the moment this is the only case, see MayHaveEntryPointSlotsToBackpatch(). If that changes in the future, this
        // function may have to handle other cases in SetCodeEntryPoint().
        _ASSERTE(IsVersionableWithVtableSlotBackpatch());
        SetMethodEntryPoint(entryPoint);
    }

public:
    void RecordAndBackpatchEntryPointSlot(LoaderAllocator *slotLoaderAllocator, TADDR slot, EntryPointSlots::SlotType slotType);
private:
    void RecordAndBackpatchEntryPointSlot_Locked(LoaderAllocator *mdLoaderAllocator, LoaderAllocator *slotLoaderAllocator, TADDR slot, EntryPointSlots::SlotType slotType, PCODE currentEntryPoint);

public:
    void BackpatchEntryPointSlots(PCODE entryPoint)
    {
        WRAPPER_NO_CONTRACT;
        _ASSERTE(entryPoint != GetPrestubEntryPointToBackpatch());
        _ASSERTE(MayHaveEntryPointSlotsToBackpatch());

        BackpatchEntryPointSlots(entryPoint, false /* isPrestubEntryPoint */);
    }

    void BackpatchToResetEntryPointSlots()
    {
        WRAPPER_NO_CONTRACT;
        _ASSERTE(MayHaveEntryPointSlotsToBackpatch());

        BackpatchEntryPointSlots(GetPrestubEntryPointToBackpatch(), true /* isPrestubEntryPoint */);
    }

private:
    void BackpatchEntryPointSlots(PCODE entryPoint, bool isPrestubEntryPoint);

public:
    void SetCodeEntryPoint(PCODE entryPoint);
    void ResetCodeEntryPoint();

#endif // !CROSSGEN_COMPILE

public:
    bool RequestedAggressiveOptimization()
    {
        WRAPPER_NO_CONTRACT;

        return
            IsIL() && // only makes sense for IL methods, and this implies !IsNoMetadata()
            IsMiAggressiveOptimization(GetImplAttrs());
    }

    // Does this method force the NativeCodeSlot to stay fixed after it
    // is first initialized to native code? Consumers of the native code
    // pointer need to be very careful about if and when they cache it
    // if it is not stable.
    //
    // The stability of the native code pointer is separate from the
    // stability of the entrypoint. A stable entrypoint can be a precode
    // which dispatches to an unstable native code pointer.
    BOOL IsNativeCodeStableAfterInit()
    {
        LIMITED_METHOD_DAC_CONTRACT;

#if defined(FEATURE_JIT_PITCHING)
        if (IsPitchable())
            return false;
#endif

        return !IsVersionableWithoutJumpStamp() && !IsEnCMethod();
    }

    //Is this method currently pointing to native code that will never change?
    BOOL IsPointingToStableNativeCode()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        if (!IsNativeCodeStableAfterInit())
            return FALSE;

        return IsPointingToNativeCode();
    }

    // Note: We are skipping the prestub based on addition information from the JIT.
    // (e.g. that the call is on same this ptr or that the this ptr is not null).
    // Thus we can end up with a running NGENed method for which IsPointingToNativeCode is false!
    BOOL IsPointingToNativeCode()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        if (!HasStableEntryPoint())
            return FALSE;

        if (!HasPrecode())
            return TRUE;

        return GetPrecode()->IsPointingToNativeCode(GetNativeCode());
    }

    // Be careful about races with profiler when using this method. The profiler can 
    // replace preimplemented code of the method with jitted code.
    // Avoid code patterns like if(HasNativeCode()) { PCODE pCode = GetNativeCode(); ... }.
    // Use PCODE pCode = GetNativeCode(); if (pCode != NULL) { ... } instead.
    BOOL HasNativeCode()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return GetNativeCode() != NULL;
    }

    BOOL SetNativeCodeInterlocked(PCODE addr, PCODE pExpected = NULL);

    TADDR GetAddrOfNativeCodeSlot();

    BOOL MayHaveNativeCode();

    ULONG GetRVA();

public:

    // Returns preimplemented code of the method if method has one.
    // Returns NULL if method has no preimplemented code.
    // Be careful about races with profiler when using this method. The profiler can 
    // replace preimplemented code of the method with jitted code.
    PCODE GetPreImplementedCode();

    // Returns address of code to call. The address is good for one immediate invocation only.
    // Use GetMultiCallableAddrOfCode() to get address that can be invoked multiple times.
    //
    // Only call GetSingleCallableAddrOfCode() if you can guarantee that no virtualization is 
    // necessary, or if you can guarantee that it has already happened. For instance, the frame of a
    // stackwalk has obviously been virtualized as much as it will be.
    //
    PCODE GetSingleCallableAddrOfCode()
    { 
        WRAPPER_NO_CONTRACT; 
        _ASSERTE(!IsGenericMethodDefinition());
        return GetMethodEntryPoint();
    }

    // This one is used to implement "ldftn".
    PCODE GetMultiCallableAddrOfCode(CORINFO_ACCESS_FLAGS accessFlags = CORINFO_ACCESS_LDFTN);

    // Internal version of GetMultiCallableAddrOfCode. Returns NULL if attempt to acquire directly
    // callable entrypoint would result into unnecesary allocation of indirection stub. Caller should use
    // indirect call via slot in this case.
    PCODE TryGetMultiCallableAddrOfCode(CORINFO_ACCESS_FLAGS accessFlags);

    // These return an address after resolving "virtual methods" correctly, including any
    // handling of context proxies, other thunking layers and also including
    // instantiation of generic virtual methods if required.
    // The first one returns an address which cannot be invoked
    // multiple times. Use GetMultiCallableAddrOfVirtualizedCode() for that.
    //
    // The code that implements these was taken verbatim from elsewhere in the
    // codebase, and there may be subtle differences between the two, e.g. with
    // regard to thunking.
    PCODE GetSingleCallableAddrOfVirtualizedCode(OBJECTREF *orThis, TypeHandle staticTH);
    PCODE GetMultiCallableAddrOfVirtualizedCode(OBJECTREF *orThis, TypeHandle staticTH);

    // The current method entrypoint. It is simply the value of the current method slot.
    // GetMethodEntryPoint() should be used to get an opaque method entrypoint, for instance 
    // when copying or searching vtables. It should not be used to get address to call.
    //
    // GetSingleCallableAddrOfCode() and GetStableEntryPoint() are aliases with stricter preconditions.
    // Use of these aliases is as appropriate.
    //
    PCODE GetMethodEntryPoint();

    //*******************************************************************************
    // Returns the address of the native code. The native code can be one of:
    // - jitted code if !IsPreImplemented()
    // - ngened code if IsPreImplemented()
    PCODE GetNativeCode();

#if defined(FEATURE_JIT_PITCHING)
    bool IsPitchable();
    void PitchNativeCode();
#endif

    //================================================================
    // FindOrCreateAssociatedMethodDesc
    //
    // You might think that every MethodDef in the metadata had
    // one and only one MethodDesc in the source...  Well, how wrong
    // you are :-)
    //
    // Some MethodDefs can be associated with more than one MethodDesc.
    // This can happen because:
    //      (1) The method is an instance method in a struct, which
    //          can be called with either an unboxed "this" pointer or
    //          a "boxed" this pointer..  There is a different MethodDesc for
    //          these two cases.
    //      (2) The method is a generic method.  There is one primary
    //          MethodDesc for each generic method, called the GenericMethodDefinition.
    //          This is the one stored in the vtable.  New MethodDescs will
    //          be created for instantiations according to the scheme described
    //          elsewhere in this file.
    // There are also various other stubs associated with MethodDesc, but these stubs
    // do not result in new MethodDescs.
    //
    // All of the above MethodDescs are called "associates" of the primary MethodDesc.
    // Note that the primary MethodDesc for an instance method on a struct is
    // the one that accepts an unboxed "this" pointer.
    //
    // FindOrCreateAssociatedMethodDesc is the _primary_ routine
    // in the codebase for getting an associated MethodDesc from a primary MethodDesc.
    // You should treat this routine as a black box, i.e. just specify the right
    // parameters and it will do all the hard work of finding the right
    // MethodDesc for you.
    //
    // This routine can be used for "normal" MethodDescs that have nothing
    // to do with generics.  For example, if you need an BoxedEntryPointStub then
    // you may call this routine to get it.  It may also return
    // the Primary MethodDesc itself if that MethodDesc is suitable given the
    // parameters.
    //
    // NOTE: The behaviour of this method is not thoroughly defined
    // if pPrimaryMD is not really a "primary" MD.  Primary MDs are:
    //     1. Primary MDs are:never a generic method instantiation,
    //        but are instead the "uninstantiated" generic MD.
    //     2. Primary MDs are never instantiating stubs.
    //     3. Primary MDs are never BoxedEntryPointStubs.
    //
    // We assert if cases (1) or (2) occur.  However, some places in the
    // code pass in an BoxedEntryPointStub when pPrimaryMD is a virtual/interface method on
    // a struct.  These cases are confusing and should be rooted
    // out: it is probably preferable in terms
    // of correctness to pass in the the corresponding non-unboxing MD.
    //
    // allowCreate may be set to FALSE to enforce that the method searched
    // should already be in existence - thus preventing creation and GCs during 
    // inappropriate times.
    //
    static MethodDesc* FindOrCreateAssociatedMethodDesc(MethodDesc* pPrimaryMD,
                                                        MethodTable *pExactMT,
                                                        BOOL forceBoxedEntryPoint,
                                                        Instantiation methodInst,
                                                        BOOL allowInstParam,
                                                        BOOL forceRemotableMethod = FALSE,
                                                        BOOL allowCreate = TRUE,
                                                        ClassLoadLevel level = CLASS_LOADED);

    // Normalize methoddesc for reflection
    static MethodDesc* FindOrCreateAssociatedMethodDescForReflection(MethodDesc *pMethod,
                                                                     TypeHandle instType,
                                                                     Instantiation methodInst);

    // True if a MD is an funny BoxedEntryPointStub (not from the method table) or
    // an MD for a generic instantiation...In other words the MethodDescs and the
    // MethodTable are guaranteed to be "tightly-knit", i.e. if one is present in
    // an NGEN image then then other will be, and if one is "used" at runtime then
    // the other will be too.
    BOOL IsTightlyBoundToMethodTable();

    // For method descriptors which are non-generic this is the identity function
    // (except it returns the primary descriptor, not an BoxedEntryPointStub).
    //
    // For a generic method definition C<T>.m<U> this will return
    // C<__Canon>.m<__Canon>
    //
    // allowCreate may be set to FALSE to enforce that the method searched
    // should already be in existence - thus preventing creation and GCs during 
    // inappropriate times.
    //
    MethodDesc * FindOrCreateTypicalSharedInstantiation(BOOL allowCreate = TRUE);

    // Given an object and an method descriptor for an instantiation of
    // a virtualized generic method, get the
    // corresponding instantiation of the target of a call.
    MethodDesc *ResolveGenericVirtualMethod(OBJECTREF *orThis);


private:
    ReturnKind ParseReturnKindFromSig(INDEBUG(bool supportStringConstructors = false));

public:
    // This method is used to restore ReturnKind using the class handle, it is fully supported only on x64 Ubuntu,
    // other platforms do not support multi-reg return case with pointers. 
    // Use this method only when you can't hit this case
    // (like ComPlusMethodFrame::GcScanRoots) or when you can tolerate RT_Illegal return.
    // Also, on the other platforms for a single field struct return case
    // the function can't distinguish RT_Object and RT_ByRef.
    ReturnKind GetReturnKind(INDEBUG(bool supportStringConstructors = false));

public:
    // In general you don't want to call GetCallTarget - you want to
    // use either "call" directly or call MethodDesc::GetSingleCallableAddrOfVirtualizedCode and
    // then "CallTarget".  Note that GetCallTarget is approximately GetSingleCallableAddrOfCode
    // but the additional wierdness that class-based-virtual calls (but not interface calls nor calls
    // on proxies) are resolved to their target.  Because of this, many clients of "Call" (see above)
    // end up doing some resolution for interface calls and/or proxies themselves.
    PCODE GetCallTarget(OBJECTREF* pThisObj, TypeHandle ownerType = TypeHandle());

    MethodImpl *GetMethodImpl();


#if defined(FEATURE_PREJIT ) && !defined(DACCESS_COMPILE)
    //================================================================
    // Precompilation (NGEN)

    void Save(DataImage *image);
    void Fixup(DataImage *image);
    void FixupSlot(DataImage *image, PVOID p, SSIZE_T offset, ZapRelocationType type = IMAGE_REL_BASED_PTR);

    //
    // Helper class used to regroup MethodDesc chunks before saving them into NGen image.
    // The regrouping takes into account IBC data and optional NGen-specific MethodDesc members.
    //
    class SaveChunk
    {
        DataImage * m_pImage;

        ZapStoredStructure * m_pFirstNode;
        MethodDescChunk * m_pLastChunk;

        typedef enum _MethodPriorityEnum
        {
            NoFlags = -1,	
            HotMethodDesc = 0x0,
            WriteableMethodDesc = 0x1,
            ColdMethodDesc = 0x2,
            ColdWriteableMethodDesc=  ColdMethodDesc | WriteableMethodDesc

        } MethodPriorityEnum;

        struct MethodInfo
        {
            MethodDesc * m_pMD;
            //MethodPriorityEnum
            BYTE m_priority;

            BOOL m_fHasPrecode:1;
            BOOL m_fHasNativeCodeSlot:1;
            BOOL m_fHasFixupList:1;
        };

        InlineSArray<MethodInfo, 20> m_methodInfos;

        static int __cdecl MethodInfoCmp(const void* a_, const void* b_);

        SIZE_T GetSavedMethodDescSize(MethodInfo * pMethodInfo);

        void SaveOneChunk(COUNT_T start, COUNT_T count, ULONG size, DWORD priority);

    public:
        SaveChunk(DataImage * image)
            : m_pImage(image), m_pFirstNode(NULL), m_pLastChunk(NULL)
        {
            LIMITED_METHOD_CONTRACT;
        }

        void Append(MethodDesc * pMD);

        ZapStoredStructure * Save();
    };

    bool CanSkipDoPrestub(MethodDesc * callerMD, 
                          CorInfoIndirectCallReason *pReason,
                          CORINFO_ACCESS_FLAGS  accessFlags = CORINFO_ACCESS_ANY);

    // This is different from !IsRestored() in that it checks if restoring
    // will ever be needed for this ngened data-structure.
    // This is to be used at ngen time of a dependent module to determine
    // if it can be accessed directly, or if the restoring mechanism needs
    // to be hooked in.
    BOOL NeedsRestore(DataImage *image, BOOL fAssumeMethodTableRestored = FALSE)
    {
        WRAPPER_NO_CONTRACT;
        return ComputeNeedsRestore(image, NULL, fAssumeMethodTableRestored);
    }

    BOOL ComputeNeedsRestore(DataImage *image, TypeHandleList *pVisited, BOOL fAssumeMethodTableRestored = FALSE);

    //
    // After the zapper compiles all code in a module it may attempt
    // to populate entries in all dictionaries
    // associated with instantiations of generic methods.  This is an optional step - nothing will
    // go wrong at runtime except we may get more one-off calls to JIT_GenericHandle.
    // Although these are one-off we prefer to avoid them since they touch metadata
    // pages.
    //
    // Fully populating a dictionary may in theory load more types, methods etc. However
    // for the moment only those entries that refer to things that
    // are already loaded will be filled in.
    void PrepopulateDictionary(DataImage * image, BOOL nonExpansive);

#endif // FEATURE_PREJIT && !DACCESS_COMPILE

    TADDR GetFixupList();

    BOOL IsRestored_NoLogging();
    BOOL IsRestored();
    void CheckRestore(ClassLoadLevel level = CLASS_LOADED);

    //================================================================
    // Running the Prestub preparation step.

    // The stub produced by prestub requires method desc to be passed
    // in dedicated register. Used to implement stubs shared between
    // MethodDescs (e.g. PInvoke stubs)
    BOOL RequiresMethodDescCallingConvention(BOOL fEstimateForChunk = FALSE);

    // Returns true if the method has to have stable entrypoint always.
    BOOL RequiresStableEntryPoint(BOOL fEstimateForChunk = FALSE);

    //
    // Backpatch method slots
    //
    // Arguments:
    //     pMT - cached value of code:MethodDesc::GetMethodTable()
    //     pDispatchingMT - method table of the object that the method is being dispatched on, can be NULL.
    //     fFullBackPatch - indicates whether to patch all possible slots, including the ones 
    //                      expensive to patch
    //                      
    // Return value:
    //     stable entry point (code:MethodDesc::GetStableEntryPoint())
    //
    PCODE DoBackpatch(MethodTable * pMT, MethodTable * pDispatchingMT, BOOL fFullBackPatch);

    PCODE DoPrestub(MethodTable *pDispatchingMT);

    VOID GetMethodInfo(SString &namespaceOrClassName, SString &methodName, SString &methodSignature);
    VOID GetMethodInfoWithNewSig(SString &namespaceOrClassName, SString &methodName, SString &methodSignature);
    VOID GetMethodInfoNoSig(SString &namespaceOrClassName, SString &methodName);
    VOID GetFullMethodInfo(SString& fullMethodSigName);

    BOOL HasTypeEquivalentStructParameters();

    typedef void (*WalkValueTypeParameterFnPtr)(Module *pModule, mdToken token, Module *pDefModule, mdToken tkDefToken, const SigParser *ptr, SigTypeContext *pTypeContext, void *pData);

    void WalkValueTypeParameters(MethodTable *pMT, WalkValueTypeParameterFnPtr function, void *pData);

    void PrepareForUseAsADependencyOfANativeImage()
    {
        WRAPPER_NO_CONTRACT;
        if (!IsZapped() && !HaveValueTypeParametersBeenWalked())
            PrepareForUseAsADependencyOfANativeImageWorker();
    }

    void PrepareForUseAsADependencyOfANativeImageWorker();

    //================================================================
    // The actual data stored in a MethodDesc follows.

protected:
    enum {
        // There are flags available for use here (currently 5 flags bits are available); however, new bits are hard to come by, so any new flags bits should
        // have a fairly strong justification for existence.
        enum_flag3_TokenRemainderMask                       = 0x3FFF, // This must equal METHOD_TOKEN_REMAINDER_MASK calculated higher in this file
                                                                      // These are seperate to allow the flags space available and used to be obvious here
                                                                      // and for the logic that splits the token to be algorithmically generated based on the 
                                                                      // #define
        enum_flag3_HasForwardedValuetypeParameter           = 0x4000, // Indicates that a type-forwarded type is used as a valuetype parameter (this flag is only valid for ngenned items)
        enum_flag3_ValueTypeParametersWalked                = 0x4000, // Indicates that all typeref's in the signature of the method have been resolved to typedefs (or that process failed) (this flag is only valid for non-ngenned methods)
        enum_flag3_DoesNotHaveEquivalentValuetypeParameters = 0x8000, // Indicates that we have verified that there are no equivalent valuetype parameters for this method
    };
    UINT16      m_wFlags3AndTokenRemainder;
    
    BYTE        m_chunkIndex;

    enum {
        // enum_flag2_HasPrecode implies that enum_flag2_HasStableEntryPoint is set.
        enum_flag2_HasStableEntryPoint      = 0x01,   // The method entrypoint is stable (either precode or actual code)
        enum_flag2_HasPrecode               = 0x02,   // Precode has been allocated for this method

        enum_flag2_IsUnboxingStub           = 0x04,
        enum_flag2_HasNativeCodeSlot        = 0x08,   // Has slot for native code

        enum_flag2_IsJitIntrinsic           = 0x10,   // Jit may expand method as an intrinsic

        enum_flag2_IsEligibleForTieredCompilation = 0x20,

        // unused                           = 0x40,
        // unused                           = 0x80, 
    };
    BYTE        m_bFlags2;

    // The slot number of this MethodDesc in the vtable array.
    // Note that we may store other information in the high bits if available -- 
    // see enum_packedSlotLayout and mdcRequiresFullSlotNumber for details.
    WORD m_wSlotNumber;

    enum {
        enum_packedSlotLayout_SlotMask      = 0x03FF,
        enum_packedSlotLayout_NameHashMask  = 0xFC00
    };

    WORD m_wFlags;



public:
#ifdef DACCESS_COMPILE 
    void EnumMemoryRegions(CLRDataEnumMemoryFlags flags);
#endif

public:
    inline DWORD GetClassification() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (m_wFlags & mdcClassification);
    }

    inline void SetClassification(DWORD classification)
    {
        LIMITED_METHOD_CONTRACT;
        _ASSERTE((m_wFlags & mdcClassification) == 0);
        m_wFlags |= classification;
    }

    inline BOOL HasNativeCodeSlot()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (m_bFlags2 & enum_flag2_HasNativeCodeSlot) != 0;
    }

    inline void SetHasNativeCodeSlot()
    {
        LIMITED_METHOD_CONTRACT;
        m_bFlags2 |= enum_flag2_HasNativeCodeSlot;
    }

    inline BOOL IsJitIntrinsic()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (m_bFlags2 & enum_flag2_IsJitIntrinsic) != 0;
    }

    inline void SetIsJitIntrinsic()
    {
        LIMITED_METHOD_CONTRACT;
        m_bFlags2 |= enum_flag2_IsJitIntrinsic;
    }

    static const SIZE_T s_ClassificationSizeTable[];

    static SIZE_T GetBaseSize(DWORD classification)
    {
        LIMITED_METHOD_DAC_CONTRACT;
        _ASSERTE(classification < mdcClassificationCount);
        return s_ClassificationSizeTable[classification];
    }

    SIZE_T GetBaseSize()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return GetBaseSize(GetClassification());
    }

    SIZE_T SizeOf();

    WORD InterlockedUpdateFlags3(WORD wMask, BOOL fSet);

#ifdef FEATURE_TYPEEQUIVALENCE
    inline BOOL DoesNotHaveEquivalentValuetypeParameters()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return (m_wFlags3AndTokenRemainder & enum_flag3_DoesNotHaveEquivalentValuetypeParameters) != 0;
    }

    inline void SetDoesNotHaveEquivalentValuetypeParameters()
    {
        LIMITED_METHOD_CONTRACT;
        InterlockedUpdateFlags3(enum_flag3_DoesNotHaveEquivalentValuetypeParameters, TRUE);
    }
#endif // FEATURE_TYPEEQUIVALENCE

    inline BOOL HasForwardedValuetypeParameter()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        // This should only be asked of Zapped MethodDescs
        _ASSERTE(IsZapped());
        return (m_wFlags3AndTokenRemainder & enum_flag3_HasForwardedValuetypeParameter) != 0;
    }

    inline void SetHasForwardedValuetypeParameter()
    {
        LIMITED_METHOD_CONTRACT;
        InterlockedUpdateFlags3(enum_flag3_HasForwardedValuetypeParameter, TRUE);
    }

    inline BOOL HaveValueTypeParametersBeenWalked()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        // This should only be asked of non-Zapped MethodDescs, and only during execution (not compilation)
        _ASSERTE(!IsZapped() && !IsCompilationProcess());

        return (m_wFlags3AndTokenRemainder & enum_flag3_ValueTypeParametersWalked) != 0;
    }

    inline void SetValueTypeParametersWalked()
    {
        LIMITED_METHOD_CONTRACT;

        _ASSERTE(!IsZapped() && !IsCompilationProcess());

        InterlockedUpdateFlags3(enum_flag3_ValueTypeParametersWalked, TRUE);
    }

    //
    // Optional MethodDesc slots appear after the end of base MethodDesc in this order:
    //

    // class MethodImpl;                            // Present if HasMethodImplSlot() is true

    typedef RelativePointer<PCODE> NonVtableSlot;   // Present if HasNonVtableSlot() is true 
                                                    // RelativePointer for NGen, PCODE for JIT

#define FIXUP_LIST_MASK 1
    typedef RelativePointer<TADDR> NativeCodeSlot;  // Present if HasNativeCodeSlot() is true
                                                    // lower order bit (FIXUP_LIST_MASK) used to determine if FixupListSlot is present
    typedef RelativePointer<TADDR> FixupListSlot;

// Stub Dispatch code
public:
    MethodDesc *GetInterfaceMD();

// StubMethodInfo for use in creating RuntimeMethodHandles
    REFLECTMETHODREF GetStubMethodInfo();
    
    PrecodeType GetPrecodeType();


    // ---------------------------------------------------------------------------------
    // IL based Code generation pipeline
    // ---------------------------------------------------------------------------------

#ifndef DACCESS_COMPILE
public:
    PCODE PrepareInitialCode();
    PCODE PrepareCode(NativeCodeVersion codeVersion);
    PCODE PrepareCode(PrepareCodeConfig* pConfig);

private:
    PCODE PrepareILBasedCode(PrepareCodeConfig* pConfig);
    PCODE GetPrecompiledCode(PrepareCodeConfig* pConfig);
    PCODE GetPrecompiledNgenCode(PrepareCodeConfig* pConfig);
    PCODE GetPrecompiledR2RCode(PrepareCodeConfig* pConfig);
    PCODE GetMulticoreJitCode();
    COR_ILMETHOD_DECODER* GetAndVerifyILHeader(PrepareCodeConfig* pConfig, COR_ILMETHOD_DECODER* pIlDecoderMemory);
    COR_ILMETHOD_DECODER* GetAndVerifyMetadataILHeader(PrepareCodeConfig* pConfig, COR_ILMETHOD_DECODER* pIlDecoderMemory);
    COR_ILMETHOD_DECODER* GetAndVerifyNoMetadataILHeader();
    PCODE JitCompileCode(PrepareCodeConfig* pConfig);
    PCODE JitCompileCodeLockedEventWrapper(PrepareCodeConfig* pConfig, JitListLockEntry* pEntry);
    PCODE JitCompileCodeLocked(PrepareCodeConfig* pConfig, JitListLockEntry* pLockEntry, ULONG* pSizeOfCode, CORJIT_FLAGS* pFlags);
#endif // DACCESS_COMPILE

#ifdef HAVE_GCCOVER
private:
    static CrstStatic m_GCCoverCrst;

public:
    static void Init();
#endif
};

#ifndef DACCESS_COMPILE
class PrepareCodeConfig
{
public:
    PrepareCodeConfig();
    PrepareCodeConfig(NativeCodeVersion nativeCodeVersion, BOOL needsMulticoreJitNotification, BOOL mayUsePrecompiledCode);
    MethodDesc* GetMethodDesc();
    NativeCodeVersion GetCodeVersion();
    BOOL NeedsMulticoreJitNotification();
    BOOL MayUsePrecompiledCode();
    virtual PCODE IsJitCancellationRequested();
    virtual BOOL SetNativeCode(PCODE pCode, PCODE * ppAlternateCodeToUse);
    virtual COR_ILMETHOD* GetILHeader();
    virtual CORJIT_FLAGS GetJitCompilationFlags();
    BOOL ProfilerRejectedPrecompiledCode();
    BOOL ReadyToRunRejectedPrecompiledCode();
    void SetProfilerRejectedPrecompiledCode();
    void SetReadyToRunRejectedPrecompiledCode();

#ifndef CROSSGEN_COMPILE
public:
    enum class JitOptimizationTier : UINT8
    {
        Unknown, // to identify older runtimes that would send this value
        MinOptJitted,
        Optimized,
        QuickJitted,
        OptimizedTier1,

        Count
    };

    static JitOptimizationTier GetJitOptimizationTier(PrepareCodeConfig *config, MethodDesc *methodDesc);
    static const char *GetJitOptimizationTierStr(PrepareCodeConfig *config, MethodDesc *methodDesc);

    bool JitSwitchedToMinOpt() const
    {
        LIMITED_METHOD_CONTRACT;
        return m_jitSwitchedToMinOpt;
    }

    void SetJitSwitchedToMinOpt()
    {
        LIMITED_METHOD_CONTRACT;

#ifdef FEATURE_TIERED_COMPILATION
        m_jitSwitchedToOptimized = false;
#endif
        m_jitSwitchedToMinOpt = true;
    }

#ifdef FEATURE_TIERED_COMPILATION
public:
    bool JitSwitchedToOptimized() const
    {
        LIMITED_METHOD_CONTRACT;
        return m_jitSwitchedToOptimized;
    }

    void SetJitSwitchedToOptimized()
    {
        LIMITED_METHOD_CONTRACT;

        if (!m_jitSwitchedToMinOpt)
        {
            m_jitSwitchedToOptimized = true;
        }
    }
#endif

public:
    PrepareCodeConfig *GetNextInSameThread() const
    {
        LIMITED_METHOD_CONTRACT;
        return m_nextInSameThread;
    }

    void SetNextInSameThread(PrepareCodeConfig *config)
    {
        LIMITED_METHOD_CONTRACT;
        _ASSERTE(config == nullptr || m_nextInSameThread == nullptr);

        m_nextInSameThread = config;
    }
#endif // !CROSSGEN_COMPILE
    
protected:
    MethodDesc* m_pMethodDesc;
    NativeCodeVersion m_nativeCodeVersion;
    BOOL m_needsMulticoreJitNotification;
    BOOL m_mayUsePrecompiledCode;
    BOOL m_ProfilerRejectedPrecompiledCode;
    BOOL m_ReadyToRunRejectedPrecompiledCode;

#ifndef CROSSGEN_COMPILE
private:
    bool m_jitSwitchedToMinOpt; // when it wasn't requested
#ifdef FEATURE_TIERED_COMPILATION
    bool m_jitSwitchedToOptimized; // when a different tier was requested
#endif
    PrepareCodeConfig *m_nextInSameThread;
#endif // !CROSSGEN_COMPILE
};

#ifdef FEATURE_CODE_VERSIONING
class VersionedPrepareCodeConfig : public PrepareCodeConfig
{
public:
    VersionedPrepareCodeConfig();
    VersionedPrepareCodeConfig(NativeCodeVersion codeVersion);
    HRESULT FinishConfiguration();
    virtual PCODE IsJitCancellationRequested();
    virtual BOOL SetNativeCode(PCODE pCode, PCODE * ppAlternateCodeToUse);
    virtual COR_ILMETHOD* GetILHeader();
    virtual CORJIT_FLAGS GetJitCompilationFlags();
private:
    ILCodeVersion m_ilCodeVersion;
};
#endif // FEATURE_CODE_VERSIONING
#endif // DACCESS_COMPILE

/******************************************************************/

// A code:MethodDescChunk is a container that holds one or more code:MethodDesc.  Logically it is just
// compression.  Basically fields that are common among methods descs in the chunk are stored in the chunk
// and the MethodDescs themselves just store and index that allows them to find their Chunk.  Semantically
// a code:MethodDescChunk is just a set of code:MethodDesc.  
class MethodDescChunk
{
    friend class MethodDesc;
    friend class CheckAsmOffsets;
#if defined(FEATURE_PREJIT) && !defined(DACCESS_COMPILE)
    friend class MethodDesc::SaveChunk;
#endif
#ifdef DACCESS_COMPILE 
    friend class NativeImageDumper;
#endif // DACCESS_COMPILE

    enum {
        enum_flag_TokenRangeMask                           = 0x03FF, // This must equal METHOD_TOKEN_RANGE_MASK calculated higher in this file
                                                                     // These are seperate to allow the flags space available and used to be obvious here
                                                                     // and for the logic that splits the token to be algorithmically generated based on the 
                                                                     // #define
        enum_flag_HasCompactEntrypoints                    = 0x4000, // Compact temporary entry points
        enum_flag_IsZapped                                 = 0x8000, // This chunk lives in NGen module
    };

public:
    //
    // Allocates methodDescCount identical MethodDescs in smallest possible number of chunks.
    // If methodDescCount is zero, one chunk with maximum number of MethodDescs is allocated.
    //
    static MethodDescChunk *CreateChunk(LoaderHeap *pHeap, DWORD methodDescCount,
                                        DWORD classification,
                                        BOOL fNonVtableSlot,
                                        BOOL fNativeCodeSlot,
                                        BOOL fComPlusCallInfo,
                                        MethodTable *initialMT,
                                        class AllocMemTracker *pamTracker);

    BOOL HasTemporaryEntryPoints()
    {
        LIMITED_METHOD_CONTRACT;
        return !IsZapped();
    }

    TADDR GetTemporaryEntryPoints()
    {
        LIMITED_METHOD_CONTRACT;
        _ASSERTE(HasTemporaryEntryPoints());
        return *(dac_cast<DPTR(TADDR)>(this) - 1);
    }

    PCODE GetTemporaryEntryPoint(int index);

    void EnsureTemporaryEntryPointsCreated(LoaderAllocator *pLoaderAllocator, AllocMemTracker *pamTracker)
    {
        CONTRACTL
        {
            THROWS;
            GC_NOTRIGGER;
            MODE_ANY;
        }
        CONTRACTL_END;

        if (GetTemporaryEntryPoints() == NULL)
            CreateTemporaryEntryPoints(pLoaderAllocator, pamTracker);
    }

    void CreateTemporaryEntryPoints(LoaderAllocator *pLoaderAllocator, AllocMemTracker *pamTracker);

#ifdef HAS_COMPACT_ENTRYPOINTS
    //
    // There two implementation options for temporary entrypoints:
    //
    // (1) Compact entrypoints. They provide as dense entrypoints as possible, but can't be patched
    // to point to the final code. The call to unjitted method is indirect call via slot.
    //
    // (2) Precodes. The precode will be patched to point to the final code eventually, thus
    // the temporary entrypoint can be embedded in the code. The call to unjitted method is
    // direct call to direct jump.
    //
    // We use (1) for x86 and (2) for 64-bit to get the best performance on each platform.
    // For ARM (1) is used.

    TADDR AllocateCompactEntryPoints(LoaderAllocator *pLoaderAllocator, AllocMemTracker *pamTracker);

    static MethodDesc* GetMethodDescFromCompactEntryPoint(PCODE addr, BOOL fSpeculative = FALSE);
    static SIZE_T SizeOfCompactEntryPoints(int count);

    static BOOL IsCompactEntryPointAtAddress(PCODE addr);

#ifdef _TARGET_ARM_
    static int GetCompactEntryPointMaxCount ();
#endif // _TARGET_ARM_
#endif // HAS_COMPACT_ENTRYPOINTS

    FORCEINLINE PTR_MethodTable GetMethodTable()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return m_methodTable.GetValue(PTR_HOST_MEMBER_TADDR(MethodDescChunk, this, m_methodTable));
    }

    inline DPTR(RelativeFixupPointer<PTR_MethodTable>) GetMethodTablePtr() const
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return dac_cast<DPTR(RelativeFixupPointer<PTR_MethodTable>)>(PTR_HOST_MEMBER_TADDR(MethodDescChunk, this, m_methodTable));
    }

#ifndef DACCESS_COMPILE 
    inline void SetMethodTable(MethodTable * pMT)
    {
        LIMITED_METHOD_CONTRACT;
        _ASSERTE(m_methodTable.IsNull());
        _ASSERTE(pMT != NULL);
        m_methodTable.SetValue(pMT);
    }

    inline void SetSizeAndCount(ULONG sizeOfMethodDescs, COUNT_T methodDescCount)
    {
        LIMITED_METHOD_CONTRACT;

        _ASSERTE(FitsIn<BYTE>((sizeOfMethodDescs / MethodDesc::ALIGNMENT) - 1));
        m_size = static_cast<BYTE>((sizeOfMethodDescs / MethodDesc::ALIGNMENT) - 1);
        _ASSERTE(SizeOf() == sizeof(MethodDescChunk) + sizeOfMethodDescs);
    
        _ASSERTE(FitsIn<BYTE>(methodDescCount - 1));
        m_count = static_cast<BYTE>(methodDescCount - 1);
        _ASSERTE(GetCount() == methodDescCount);
    }
#endif // !DACCESS_COMPILE

#ifdef FEATURE_PREJIT 
#ifndef DACCESS_COMPILE 
    inline void RestoreMTPointer(ClassLoadLevel level = CLASS_LOADED)
    {
        LIMITED_METHOD_CONTRACT;
        Module::RestoreMethodTablePointer(&m_methodTable, NULL, level);
    }
#endif // !DACCESS_COMPILE
#endif // FEATURE_PREJIT

#ifndef DACCESS_COMPILE 
    void SetNextChunk(MethodDescChunk *chunk)
    {
        LIMITED_METHOD_CONTRACT;
        m_next.SetValueMaybeNull(chunk);
    }
#endif // !DACCESS_COMPILE

    PTR_MethodDescChunk GetNextChunk()
    {
        LIMITED_METHOD_CONTRACT;
        return m_next.GetValueMaybeNull(PTR_HOST_MEMBER_TADDR(MethodDescChunk, this, m_next));
    }

    UINT32 GetCount()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return m_count + 1;
    }

    BOOL IsZapped()
    {
        LIMITED_METHOD_DAC_CONTRACT;
#ifdef FEATURE_PREJIT
        return (m_flagsAndTokenRange & enum_flag_IsZapped) != 0;
#else
        return FALSE;
#endif
    }

    inline BOOL HasCompactEntryPoints()
    {
        LIMITED_METHOD_DAC_CONTRACT;

#ifdef HAS_COMPACT_ENTRYPOINTS
        return (m_flagsAndTokenRange & enum_flag_HasCompactEntrypoints) != 0;
#else
        return FALSE;
#endif
    }

    inline UINT16 GetTokRange()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return m_flagsAndTokenRange & enum_flag_TokenRangeMask;
    }

    inline SIZE_T SizeOf()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return sizeof(MethodDescChunk) + (m_size + 1) * MethodDesc::ALIGNMENT;
    }

    inline MethodDesc *GetFirstMethodDesc()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return PTR_MethodDesc(dac_cast<TADDR>(this) + sizeof(MethodDescChunk));
    }

    // Maximum size of one chunk (corresponts to the maximum of m_size = 0xFF)
    static const SIZE_T MaxSizeOfMethodDescs = 0x100 * MethodDesc::ALIGNMENT;

#ifdef DACCESS_COMPILE 
    void EnumMemoryRegions(CLRDataEnumMemoryFlags flags);
#endif

private:
    void SetIsZapped()
    {
        LIMITED_METHOD_CONTRACT;
        m_flagsAndTokenRange |= enum_flag_IsZapped;
    }

    void SetHasCompactEntryPoints()
    {
        LIMITED_METHOD_CONTRACT;
        m_flagsAndTokenRange |= enum_flag_HasCompactEntrypoints;
    }

    void SetTokenRange(UINT16 tokenRange)
    {
        LIMITED_METHOD_CONTRACT;
        _ASSERTE((tokenRange & ~enum_flag_TokenRangeMask) == 0);
        static_assert_no_msg(enum_flag_TokenRangeMask == METHOD_TOKEN_RANGE_MASK);
        m_flagsAndTokenRange = (m_flagsAndTokenRange & ~enum_flag_TokenRangeMask) | tokenRange;
    }

    RelativeFixupPointer<PTR_MethodTable> m_methodTable;

    RelativePointer<PTR_MethodDescChunk> m_next;

    BYTE                 m_size;        // The size of this chunk minus 1 (in multiples of MethodDesc::ALIGNMENT)
    BYTE                 m_count;       // The number of MethodDescs in this chunk minus 1
    UINT16               m_flagsAndTokenRange;

    // Followed by array of method descs...
};

inline int MethodDesc::GetMethodDescIndex() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    return m_chunkIndex;
}

inline MethodDescChunk *MethodDesc::GetMethodDescChunk() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    return
        PTR_MethodDescChunk(dac_cast<TADDR>(this) -
                            (sizeof(MethodDescChunk) + (GetMethodDescIndex() * MethodDesc::ALIGNMENT)));
}

// convert an entry point into a MethodDesc
MethodDesc* Entry2MethodDesc(PCODE entryPoint, MethodTable *pMT);


typedef DPTR(class StoredSigMethodDesc) PTR_StoredSigMethodDesc;
class StoredSigMethodDesc : public MethodDesc
{
  public:
    // Put the sig RVA in here - this allows us to avoid
    // touching the method desc table when mscorlib is prejitted.

    RelativePointer<TADDR>           m_pSig;
    DWORD           m_cSig;
#ifdef _WIN64 
    // m_dwExtendedFlags is not used by StoredSigMethodDesc itself.
    // It is used by child classes. We allocate the space here to get
    // optimal layout.
    DWORD           m_dwExtendedFlags;
#endif

    TADDR GetSigRVA()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return RelativePointer<TADDR>::GetValueMaybeNullAtPtr(PTR_HOST_MEMBER_TADDR(StoredSigMethodDesc, this, m_pSig));
    }

    bool HasStoredMethodSig(void)
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return !m_pSig.IsNull();
    }
    PCCOR_SIGNATURE GetStoredMethodSig(DWORD* sigLen = NULL)
    {
        LIMITED_METHOD_DAC_CONTRACT;
        if (sigLen)
        {
            *sigLen = m_cSig;
        }
#ifdef DACCESS_COMPILE 
        return (PCCOR_SIGNATURE)
            DacInstantiateTypeByAddress(GetSigRVA(), m_cSig, true);
#else // !DACCESS_COMPILE
        g_IBCLogger.LogNDirectCodeAccess(this);
        return (PCCOR_SIGNATURE) m_pSig.GetValueMaybeNull();
#endif // !DACCESS_COMPILE
    }
    void SetStoredMethodSig(PCCOR_SIGNATURE sig, DWORD sigBytes)
    {
#ifndef DACCESS_COMPILE 
        m_pSig.SetValueMaybeNull((TADDR)sig);
        m_cSig = sigBytes;
#endif // !DACCESS_COMPILE
    }

#ifdef DACCESS_COMPILE 
    void EnumMemoryRegions(CLRDataEnumMemoryFlags flags);
#endif
};

//-----------------------------------------------------------------------
// Operations specific to FCall methods. We use a derived class to get
// the compiler involved in enforcing proper method type usage.
// DO NOT ADD FIELDS TO THIS CLASS.
//-----------------------------------------------------------------------

class FCallMethodDesc : public MethodDesc
{
#ifdef DACCESS_COMPILE
    friend class NativeImageDumper;
#endif

    DWORD   m_dwECallID;
#ifdef _WIN64 
    DWORD   m_padding;
#endif

public:
    void SetECallID(DWORD dwID)
    {
        LIMITED_METHOD_CONTRACT;
        m_dwECallID = dwID;
    }

    DWORD GetECallID()
    {
        LIMITED_METHOD_CONTRACT;
        return m_dwECallID;
    }
};

class HostCodeHeap;
class LCGMethodResolver;
typedef DPTR(LCGMethodResolver)       PTR_LCGMethodResolver;
class ILStubResolver;
typedef DPTR(ILStubResolver)          PTR_ILStubResolver;
class DynamicResolver;
typedef DPTR(DynamicResolver)         PTR_DynamicResolver;

class DynamicMethodDesc : public StoredSigMethodDesc
{
    friend class ILStubCache;
    friend class ILStubState;
    friend class DynamicMethodTable;
    friend class MethodDesc;
#ifdef DACCESS_COMPILE
    friend class NativeImageDumper;
#endif

protected:
    RelativePointer<PTR_CUTF8>           m_pszMethodName;
    PTR_DynamicResolver m_pResolver;

#ifndef _WIN64
    // We use m_dwExtendedFlags from StoredSigMethodDesc on WIN64
    DWORD               m_dwExtendedFlags;   // see DynamicMethodDesc::ExtendedFlags enum
#endif

    typedef enum ExtendedFlags
    {
        nomdAttrs           = 0x0000FFFF, // method attributes (LCG)
        nomdILStubAttrs     = mdMemberAccessMask | mdStatic, //  method attributes (IL stubs)

        // attributes (except mdStatic and mdMemberAccessMask) have different meaning for IL stubs
        // mdMemberAccessMask     = 0x0007,
        nomdReverseStub           = 0x0008,
        // mdStatic               = 0x0010,
        nomdCALLIStub             = 0x0020,
        nomdDelegateStub          = 0x0040,
        // unused                 = 0x0080
        nomdUnbreakable           = 0x0100,
        nomdDelegateCOMStub       = 0x0200,  // CLR->COM or COM->CLR call via a delegate (WinRT specific)
        nomdSignatureNeedsRestore = 0x0400,
        nomdStubNeedsCOMStarted   = 0x0800,  // EnsureComStarted must be called before executing the method
        nomdMulticastStub         = 0x1000,
        nomdUnboxingILStub        = 0x2000,
        nomdWrapperDelegateStub   = 0x4000,

        nomdILStub          = 0x00010000,
        nomdLCGMethod       = 0x00020000,
        nomdStackArgSize    = 0xFFFC0000, // native stack arg size for IL stubs
    } ExtendedFlags;

public:
    bool IsILStub() { LIMITED_METHOD_DAC_CONTRACT; return !!(m_dwExtendedFlags & nomdILStub); }
    bool IsLCGMethod() { LIMITED_METHOD_DAC_CONTRACT; return !!(m_dwExtendedFlags & nomdLCGMethod); }

	inline PTR_DynamicResolver    GetResolver();
    inline PTR_LCGMethodResolver  GetLCGMethodResolver();
    inline PTR_ILStubResolver     GetILStubResolver();

    PTR_CUTF8 GetMethodName()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return RelativePointer<PTR_CUTF8>::GetValueMaybeNullAtPtr(PTR_HOST_MEMBER_TADDR(DynamicMethodDesc, this, m_pszMethodName));
    }

    WORD GetAttrs()
    {
        LIMITED_METHOD_CONTRACT;
        return (IsILStub() ? (m_dwExtendedFlags & nomdILStubAttrs) : (m_dwExtendedFlags & nomdAttrs));
    }

    DWORD GetExtendedFlags()
    {
        LIMITED_METHOD_CONTRACT;
        return m_dwExtendedFlags;
    }

    WORD GetNativeStackArgSize()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        _ASSERTE(IsILStub());
        return (WORD)((m_dwExtendedFlags & nomdStackArgSize) >> 16);
    }

    void SetNativeStackArgSize(WORD cbArgSize)
    {
        LIMITED_METHOD_CONTRACT; 
        _ASSERTE(IsILStub() && (cbArgSize % sizeof(SLOT)) == 0);
        m_dwExtendedFlags = (m_dwExtendedFlags & ~nomdStackArgSize) | ((DWORD)cbArgSize << 16);
    }

    void SetUnbreakable(bool value)
    {
        LIMITED_METHOD_CONTRACT;
        if (value)
        {
            m_dwExtendedFlags |= nomdUnbreakable;
        }
    }

    void SetSignatureNeedsRestore(bool value)
    {
        LIMITED_METHOD_CONTRACT;
        if (value)
        {
            m_dwExtendedFlags |= nomdSignatureNeedsRestore;
        }
    }

    void SetStubNeedsCOMStarted(bool value)
    {
        LIMITED_METHOD_CONTRACT;
        if (value)
        {
            m_dwExtendedFlags |= nomdStubNeedsCOMStarted;
        }
    }

    bool IsRestored()
    {
        LIMITED_METHOD_CONTRACT;

        if (IsSignatureNeedsRestore())
        {
            // Since we don't update the signatreNeedsRestore bit when we actually
            // restore the signature, the bit will have a stall value.  The signature
            // bit in the metadata will always contain the correct, up-to-date
            // information. 
            Volatile<BYTE> *pVolatileSig = (Volatile<BYTE> *)GetStoredMethodSig();
            if ((*pVolatileSig & IMAGE_CEE_CS_CALLCONV_NEEDSRESTORE) != 0)
                return false;
        }            

        return true;
    }

    bool IsReverseStub()     { LIMITED_METHOD_DAC_CONTRACT; _ASSERTE(IsILStub()); return (0 != (m_dwExtendedFlags & nomdReverseStub));  }
    bool IsCALLIStub()       { LIMITED_METHOD_DAC_CONTRACT; _ASSERTE(IsILStub()); return (0 != (m_dwExtendedFlags & nomdCALLIStub));    }
    bool IsDelegateStub()    { LIMITED_METHOD_DAC_CONTRACT; _ASSERTE(IsILStub()); return (0 != (m_dwExtendedFlags & nomdDelegateStub)); }
    bool IsCLRToCOMStub()    { LIMITED_METHOD_CONTRACT; _ASSERTE(IsILStub()); return ((0 == (m_dwExtendedFlags & mdStatic)) && !IsReverseStub() && !IsDelegateStub()); }
    bool IsCOMToCLRStub()    { LIMITED_METHOD_CONTRACT; _ASSERTE(IsILStub()); return ((0 == (m_dwExtendedFlags & mdStatic)) &&  IsReverseStub()); }
    bool IsPInvokeStub()     { LIMITED_METHOD_CONTRACT; _ASSERTE(IsILStub()); return ((0 != (m_dwExtendedFlags & mdStatic)) && !IsReverseStub() && !IsCALLIStub()); }
    bool IsUnbreakable()     { LIMITED_METHOD_CONTRACT; _ASSERTE(IsILStub()); return (0 != (m_dwExtendedFlags & nomdUnbreakable));  }
    bool IsDelegateCOMStub() { LIMITED_METHOD_CONTRACT; _ASSERTE(IsILStub()); return (0 != (m_dwExtendedFlags & nomdDelegateCOMStub));  }
    bool IsSignatureNeedsRestore() { LIMITED_METHOD_CONTRACT; _ASSERTE(IsILStub()); return (0 != (m_dwExtendedFlags & nomdSignatureNeedsRestore)); }
    bool IsStubNeedsCOMStarted()   { LIMITED_METHOD_CONTRACT; _ASSERTE(IsILStub()); return (0 != (m_dwExtendedFlags & nomdStubNeedsCOMStarted)); }
#ifdef FEATURE_MULTICASTSTUB_AS_IL
    bool IsMulticastStub() {
        LIMITED_METHOD_DAC_CONTRACT;
        _ASSERTE(IsILStub());
        return !!(m_dwExtendedFlags & nomdMulticastStub);
    }
#endif
    bool IsWrapperDelegateStub() {
        LIMITED_METHOD_DAC_CONTRACT;
        _ASSERTE(IsILStub());
        return !!(m_dwExtendedFlags & nomdWrapperDelegateStub);
    }
#ifdef FEATURE_INSTANTIATINGSTUB_AS_IL
    bool IsUnboxingILStub() { 
        LIMITED_METHOD_DAC_CONTRACT; 
        _ASSERTE(IsILStub());
        return !!(m_dwExtendedFlags & nomdUnboxingILStub);
    }
#endif

    // Whether the stub takes a context argument that is an interop MethodDesc.
    bool HasMDContextArg()
    {
        LIMITED_METHOD_CONTRACT;
        return ((IsCLRToCOMStub() && !IsDelegateCOMStub()) || IsPInvokeStub());
    }

    void Restore();
    void Fixup(DataImage* image);
    //
    // following implementations defined in DynamicMethod.cpp
    //
    void Destroy();
};


class ArrayMethodDesc : public StoredSigMethodDesc
{
public:
    // The VTABLE for an array look like

    //  System.Object Vtable
    //  System.Array Vtable
    //  type[] Vtable
    //      Get(<rank specific)
    //      Set(<rank specific)
    //      Address(<rank specific)
    //      .ctor(int)      // Possibly more

    enum {
        ARRAY_FUNC_GET      = 0,
        ARRAY_FUNC_SET      = 1,
        ARRAY_FUNC_ADDRESS  = 2,
        ARRAY_FUNC_CTOR     = 3, // Anything >= ARRAY_FUNC_CTOR is .ctor
    };

    // Get the index of runtime provided array method
    DWORD GetArrayFuncIndex()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        // The ru
        DWORD dwSlot = GetSlot();
        DWORD dwVirtuals = GetMethodTable()->GetNumVirtuals();
        _ASSERTE(dwSlot >= dwVirtuals);
        return dwSlot - dwVirtuals;
    }

    LPCUTF8 GetMethodName();
    DWORD GetAttrs();
    CorInfoIntrinsics GetIntrinsicID();
};

#ifdef HAS_NDIRECT_IMPORT_PRECODE
typedef NDirectImportPrecode NDirectImportThunkGlue;
#else // HAS_NDIRECT_IMPORT_PRECODE

class NDirectImportThunkGlue
{
    PVOID m_dummy; // Dummy field to make the alignment right

public:
    LPVOID GetEntrypoint()
    {
        LIMITED_METHOD_CONTRACT;
        return NULL;
    }
    void Init(MethodDesc *pMethod)
    {        
        LIMITED_METHOD_CONTRACT;
    }
};
#ifdef FEATURE_PREJIT
PORTABILITY_WARNING("NDirectImportThunkGlue");
#endif // FEATURE_PREJIT

#endif // HAS_NDIRECT_IMPORT_PRECODE

typedef DPTR(NDirectImportThunkGlue)      PTR_NDirectImportThunkGlue;


//
// This struct consolidates the writeable parts of the NDirectMethodDesc
// so that we can eventually layout a read-only NDirectMethodDesc with a pointer
// to the writeable parts in an ngen image
//
class NDirectWriteableData
{
public:
    // The JIT generates an indirect call through this location in some cases.
    // Initialized to NDirectImportThunkGlue. Patched to the true target or 
    // host interceptor stub or alignment thunk after linking.
    LPVOID      m_pNDirectTarget;
};

typedef DPTR(NDirectWriteableData)      PTR_NDirectWriteableData;

//-----------------------------------------------------------------------
// Operations specific to NDirect methods. We use a derived class to get
// the compiler involved in enforcing proper method type usage.
// DO NOT ADD FIELDS TO THIS CLASS.
//-----------------------------------------------------------------------
class NDirectMethodDesc : public MethodDesc
{
public:
    struct temp1
    {
        // If we are hosted, stack imbalance MDA is active, or alignment thunks are needed,
        // we will intercept m_pNDirectTarget. The true target is saved here.
        LPVOID      m_pNativeNDirectTarget;
            
        // Information about the entrypoint
        RelativePointer<PTR_CUTF8>     m_pszEntrypointName;

        union
        {
            RelativePointer<PTR_CUTF8>     m_pszLibName;
            DWORD       m_dwECallID;    // ECallID for QCalls
        };

        // The writeable part of the methoddesc.
#if defined(FEATURE_NGEN_RELOCS_OPTIMIZATIONS)
        RelativePointer<PTR_NDirectWriteableData>    m_pWriteableData;
#else
        PlainPointer<PTR_NDirectWriteableData>    m_pWriteableData;
#endif

#ifdef HAS_NDIRECT_IMPORT_PRECODE
        RelativePointer<PTR_NDirectImportThunkGlue> m_pImportThunkGlue;
#else // HAS_NDIRECT_IMPORT_PRECODE
        NDirectImportThunkGlue      m_ImportThunkGlue;
#endif // HAS_NDIRECT_IMPORT_PRECODE

        ULONG       m_DefaultDllImportSearchPathsAttributeValue; // DefaultDllImportSearchPathsAttribute is saved.

        // Various attributes needed at runtime.
        WORD        m_wFlags;

#if defined(_TARGET_X86_)
        // Size of outgoing arguments (on stack). Note that in order to get the @n stdcall name decoration,
        // it may be necessary to subtract 4 as the hidden large structure pointer parameter does not count.
        // See code:kStdCallWithRetBuf
        WORD        m_cbStackArgumentSize;
#endif // defined(_TARGET_X86_)

        // This field gets set only when this MethodDesc is marked as PreImplemented
        RelativePointer<PTR_MethodDesc> m_pStubMD;

    } ndirect;

    enum Flags
    {
        // There are two groups of flag bits here each which gets initialized
        // at different times. 

        //
        // Group 1: The init group.
        //
        //   This group is set during MethodDesc construction. No race issues
        //   here since they are initialized before the MD is ever published
        //   and never change after that.

        kEarlyBound                     = 0x0001,   // IJW managed->unmanaged thunk. Standard [sysimport] stuff otherwise.

        kHasSuppressUnmanagedCodeAccess = 0x0002,

        kDefaultDllImportSearchPathsIsCached = 0x0004, // set if we cache attribute value.

        // kUnusedMask                  = 0x0008

        //
        // Group 2: The runtime group.
        //
        //   This group is set during runtime potentially by multiple threads
        //   at the same time. All flags in this category has to be set via interlocked operation.
        //
        kIsMarshalingRequiredCached     = 0x0010,   // Set if we have cached the results of marshaling required computation
        kCachedMarshalingRequired       = 0x0020,   // The result of the marshaling required computation

        kNativeAnsi                     = 0x0040,

        kLastError                      = 0x0080,   // setLastError keyword specified
        kNativeNoMangle                 = 0x0100,   // nomangle keyword specified

        kVarArgs                        = 0x0200,
        kStdCall                        = 0x0400,
        kThisCall                       = 0x0800,

        kIsQCall                        = 0x1000,

        kDefaultDllImportSearchPathsStatus = 0x2000, // either method has custom attribute or not.

        kStdCallWithRetBuf              = 0x8000,   // Call returns large structure, only valid if kStdCall is also set

    };

    // Retrieves the cached result of marshaling required computation, or performs the computation
    // if the result is not cached yet.
    BOOL MarshalingRequired()
    {
        STANDARD_VM_CONTRACT;

        if ((ndirect.m_wFlags & kIsMarshalingRequiredCached) == 0)
        {
            // Compute the flag and cache the result
            InterlockedSetNDirectFlags(kIsMarshalingRequiredCached |
                (ComputeMarshalingRequired() ? kCachedMarshalingRequired : 0));
        }
        _ASSERTE((ndirect.m_wFlags & kIsMarshalingRequiredCached) != 0);
        return (ndirect.m_wFlags & kCachedMarshalingRequired) != 0;
    }

    BOOL ComputeMarshalingRequired();

    // Atomically set specified flags. Only setting of the bits is supported.
    void InterlockedSetNDirectFlags(WORD wFlags);

    void SetIsEarlyBound()
    {
        LIMITED_METHOD_CONTRACT;
        ndirect.m_wFlags |= kEarlyBound;
    }

    BOOL IsEarlyBound()
    {
        LIMITED_METHOD_CONTRACT;
        return (ndirect.m_wFlags & kEarlyBound) != 0;
    }

    BOOL IsNativeAnsi() const
    {
        LIMITED_METHOD_CONTRACT;

        return (ndirect.m_wFlags & kNativeAnsi) != 0;
    }

    BOOL IsNativeNoMangled() const
    {
        LIMITED_METHOD_CONTRACT;

        return (ndirect.m_wFlags & kNativeNoMangle) != 0;
    }


    DWORD GetECallID() const
    {
        LIMITED_METHOD_CONTRACT;

        _ASSERTE(IsQCall());
        return ndirect.m_dwECallID;
    }

    void SetECallID(DWORD dwID)
    {
        LIMITED_METHOD_CONTRACT;

        _ASSERTE(IsQCall());
        ndirect.m_dwECallID = dwID;
    }

    PTR_CUTF8 GetLibNameRaw()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return RelativePointer<PTR_CUTF8>::GetValueMaybeNullAtPtr(PTR_HOST_MEMBER_TADDR(NDirectMethodDesc, this, ndirect.m_pszLibName));
    }

#ifndef DACCESS_COMPILE
    LPCUTF8 GetLibName() const
    {
        LIMITED_METHOD_CONTRACT;

        return IsQCall() ? "QCall" : ndirect.m_pszLibName.GetValueMaybeNull();
    }
#endif // !DACCESS_COMPILE

    PTR_CUTF8 GetEntrypointName() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return RelativePointer<PTR_CUTF8>::GetValueMaybeNullAtPtr(PTR_HOST_MEMBER_TADDR(NDirectMethodDesc, this, ndirect.m_pszEntrypointName));
    }

    BOOL IsVarArgs() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (ndirect.m_wFlags & kVarArgs) != 0;
    }

    BOOL IsStdCall() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (ndirect.m_wFlags & kStdCall) != 0;
    }

    BOOL IsThisCall() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (ndirect.m_wFlags & kThisCall) != 0;
    }

    // Returns TRUE if this MethodDesc is internal call from mscorlib to mscorwks
    BOOL IsQCall() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (ndirect.m_wFlags & kIsQCall) != 0;
    }

    BOOL HasDefaultDllImportSearchPathsAttribute();

    BOOL IsDefaultDllImportSearchPathsAttributeCached()
    {
        LIMITED_METHOD_CONTRACT;
        return (ndirect.m_wFlags  & kDefaultDllImportSearchPathsIsCached) != 0;
    }
    
    ULONG DefaultDllImportSearchPathsAttributeCachedValue()
    {
        LIMITED_METHOD_CONTRACT;
        return ndirect.m_DefaultDllImportSearchPathsAttributeValue & 0xFFFFFFFD;
    }

    BOOL DllImportSearchAssemblyDirectory()
    {
        LIMITED_METHOD_CONTRACT;
        return (ndirect.m_DefaultDllImportSearchPathsAttributeValue & 0x2) != 0;
    }

    BOOL IsStdCallWithRetBuf() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return (ndirect.m_wFlags & kStdCallWithRetBuf) != 0;
    }

    PTR_NDirectWriteableData GetWriteableData() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return ReadPointer(this, &NDirectMethodDesc::ndirect, &decltype(NDirectMethodDesc::ndirect)::m_pWriteableData);
    }

    PTR_NDirectImportThunkGlue GetNDirectImportThunkGlue()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        TADDR base = PTR_HOST_MEMBER_TADDR(NDirectMethodDesc, this, ndirect.m_pImportThunkGlue);

#ifdef HAS_NDIRECT_IMPORT_PRECODE
        return RelativePointer<PTR_NDirectImportThunkGlue>::GetValueAtPtr(base);
#else
        return dac_cast<PTR_NDirectImportThunkGlue>(base);
#endif
    }

    LPVOID GetNDirectTarget()
    {
        LIMITED_METHOD_CONTRACT;

        _ASSERTE(IsNDirect());
        return GetWriteableData()->m_pNDirectTarget;
    }

    LPVOID GetNativeNDirectTarget()
    {
        LIMITED_METHOD_CONTRACT;

        _ASSERTE(IsNDirect());
        _ASSERTE_IMPL(!NDirectTargetIsImportThunk());

        LPVOID pNativeNDirectTarget = ndirect.m_pNativeNDirectTarget;
        if (pNativeNDirectTarget != NULL)
            return pNativeNDirectTarget;

        return GetNDirectTarget();
    }

    VOID SetNDirectTarget(LPVOID pTarget);

#ifndef DACCESS_COMPILE
    BOOL NDirectTargetIsImportThunk()
    {
        WRAPPER_NO_CONTRACT;

        _ASSERTE(IsNDirect());

        return (GetNDirectTarget() == GetNDirectImportThunkGlue()->GetEntrypoint());
    }
#endif // !DACCESS_COMPILE

    //  Find the entry point name and function address
    //  based on the module and data from NDirectMethodDesc
    //
    LPVOID FindEntryPoint(NATIVE_LIBRARY_HANDLE hMod) const;

private:
    FARPROC FindEntryPointWithMangling(NATIVE_LIBRARY_HANDLE mod, PTR_CUTF8 entryPointName) const;

public:

    void SetStackArgumentSize(WORD cbDstBuffer, CorPinvokeMap unmgdCallConv)
    {
        LIMITED_METHOD_CONTRACT;

#if defined(_TARGET_X86_)
        // thiscall passes the this pointer in ECX
        if (unmgdCallConv == pmCallConvThiscall)
        {
            _ASSERTE(cbDstBuffer >= sizeof(SLOT));
            cbDstBuffer -= sizeof(SLOT);
        }

        // Don't write to the field if it's already initialized to avoid creating private pages (NGEN)
        if (ndirect.m_cbStackArgumentSize == 0xFFFF)
        {
            ndirect.m_cbStackArgumentSize = cbDstBuffer;
        }
        else
        {
            _ASSERTE(ndirect.m_cbStackArgumentSize == cbDstBuffer);
        }
#endif // defined(_TARGET_X86_)
    }

#if defined(_TARGET_X86_)
    WORD GetStackArgumentSize() const
    {
        LIMITED_METHOD_DAC_CONTRACT;

        _ASSERTE(ndirect.m_cbStackArgumentSize != 0xFFFF);

        // If we have a methoddesc, stackArgSize is the number of bytes of
        // the outgoing marshalling buffer.
        return ndirect.m_cbStackArgumentSize;
    }
#endif // defined(_TARGET_X86_)

    VOID InitEarlyBoundNDirectTarget();

    // In AppDomains, we can trigger declarer's cctor when we link the P/Invoke,
    // which takes care of inlined calls as well. See code:NDirect.NDirectLink.
    // Although the cctor is guaranteed to run in the shared domain before the
    // target is invoked (code:IsClassConstructorTriggeredByILStub), we will
    // trigger at it link time as well because linking may depend on it - the
    // cctor may change the target DLL, change DLL search path etc.
    BOOL IsClassConstructorTriggeredAtLinkTime()
    {
        LIMITED_METHOD_CONTRACT;       
        MethodTable * pMT = GetMethodTable();
        // Try to avoid touching the EEClass if possible
        if (pMT->IsClassPreInited())
            return FALSE;      
        return !pMT->GetClass()->IsBeforeFieldInit();
    }

#ifndef DACCESS_COMPILE
    // In the shared domain and in NGENed code, we will trigger declarer's cctor
    // in the marshaling stub by calling code:StubHelpers.InitDeclaringType. If
    // this returns TRUE, the call must not be inlined.
    BOOL IsClassConstructorTriggeredByILStub()
    {
        WRAPPER_NO_CONTRACT;
        
        return (IsClassConstructorTriggeredAtLinkTime() &&
                (IsZapped() || GetDomain()->IsSharedDomain() || SystemDomain::GetCurrentDomain()->IsCompilationDomain()));
    }
#endif //!DACCESS_COMPILE
};  //class NDirectMethodDesc


//-----------------------------------------------------------------------
// Operations specific to EEImplCall methods. We use a derived class to get
// the compiler involved in enforcing proper method type usage.
//
// For now, the only EE impl is the delegate Invoke method. If we
// add other EE impl types in the future, may need a discriminator
// field here.
//-----------------------------------------------------------------------
class EEImplMethodDesc : public StoredSigMethodDesc
{ };

#ifdef FEATURE_COMINTEROP 

// This is the extra information needed to be associated with a method in order to use it for
// CLR->COM calls. It is currently used by code:ComPlusCallMethodDesc (ordinary CLR->COM calls),
// code:InstantiatedMethodDesc (optional field, CLR->COM calls on shared generic interfaces),
// and code:DelegateEEClass (delegate->COM calls for WinRT).
typedef DPTR(struct ComPlusCallInfo) PTR_ComPlusCallInfo;
struct ComPlusCallInfo
{
    // Returns ComPlusCallInfo associated with a method. pMD must be a ComPlusCallMethodDesc or
    // EEImplMethodDesc that has already been initialized for COM interop.
    inline static ComPlusCallInfo *FromMethodDesc(MethodDesc *pMD);

    enum Flags
    {
        kHasSuppressUnmanagedCodeAccess = 0x1,
        kRequiresArgumentWrapping       = 0x2,
    };

    union
    {
        // IL stub for CLR to COM call
        PCODE m_pILStub; 

        // MethodDesc of the COM event provider to forward the call to (COM event interfaces)
        MethodDesc *m_pEventProviderMD;
    };

    // method table of the interface which this represents
    PTR_MethodTable m_pInterfaceMT;

    // We need only 3 bits here, see enum Flags below.
    BYTE        m_flags;

    // ComSlot() (is cached when we first invoke the method and generate
    // the stubs for it. There's probably a better place to do this
    // caching but I'm not sure I know all the places these things are
    // created.)
    WORD        m_cachedComSlot; 

    PCODE * GetAddrOfILStubField()
    {
        LIMITED_METHOD_CONTRACT;
        return &m_pILStub;
    }

#ifdef _TARGET_X86_
    // Size of outgoing arguments (on stack). This is currently used only
    // on x86 when we have an InlinedCallFrame representing a CLR->COM call.
    WORD        m_cbStackArgumentSize;

    void InitStackArgumentSize()
    {
        LIMITED_METHOD_CONTRACT;

        m_cbStackArgumentSize = 0xFFFF;
    }

    void SetStackArgumentSize(WORD cbDstBuffer)
    {
        LIMITED_METHOD_CONTRACT;

        // Don't write to the field if it's already initialized to avoid creating private pages (NGEN)
        if (m_cbStackArgumentSize == 0xFFFF)
        {
            m_cbStackArgumentSize = cbDstBuffer;
        }
        _ASSERTE(m_cbStackArgumentSize == cbDstBuffer);
    }

    WORD GetStackArgumentSize()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        _ASSERTE(m_cbStackArgumentSize != 0xFFFF);
        return m_cbStackArgumentSize;
    }

    LPVOID      m_pRetThunk;

#else // _TARGET_X86_
    void InitStackArgumentSize()
    {
        LIMITED_METHOD_CONTRACT;
    }

    void SetStackArgumentSize(WORD cbDstBuffer)
    {
        LIMITED_METHOD_CONTRACT;
    }
#endif // _TARGET_X86_

    // This field gets set only when this MethodDesc is marked as PreImplemented
    RelativePointer<PTR_MethodDesc> m_pStubMD;

#ifdef FEATURE_PREJIT
    BOOL ShouldSave(DataImage *image);
    void Fixup(DataImage *image);
#endif
};


//-----------------------------------------------------------------------
// Operations specific to ComPlusCall methods. We use a derived class to get
// the compiler involved in enforcing proper method type usage.
// DO NOT ADD FIELDS TO THIS CLASS.
//-----------------------------------------------------------------------
class ComPlusCallMethodDesc : public MethodDesc
{
public:
    ComPlusCallInfo *m_pComPlusCallInfo; // initialized in code:ComPlusCall.PopulateComPlusCallMethodDesc

    void InitRetThunk();
    void InitComEventCallInfo();

    PCODE * GetAddrOfILStubField()
    {
        LIMITED_METHOD_CONTRACT;
        return m_pComPlusCallInfo->GetAddrOfILStubField();
    }

    MethodTable* GetInterfaceMethodTable()
    {
        LIMITED_METHOD_CONTRACT;
        _ASSERTE(m_pComPlusCallInfo->m_pInterfaceMT != NULL);
        return m_pComPlusCallInfo->m_pInterfaceMT;
    }

    MethodDesc* GetEventProviderMD()
    {
        LIMITED_METHOD_CONTRACT;

        return m_pComPlusCallInfo->m_pEventProviderMD;
    }


    BOOL RequiresArgumentWrapping()
    {
        LIMITED_METHOD_CONTRACT;

        return (m_pComPlusCallInfo->m_flags & ComPlusCallInfo::kRequiresArgumentWrapping) != 0;
    }

    void SetLateBoundFlags(BYTE newFlags)
    {
        LIMITED_METHOD_CONTRACT;

        FastInterlockOr(reinterpret_cast<DWORD *>(&m_pComPlusCallInfo->m_flags), newFlags);
    }

#ifdef _TARGET_X86_
    WORD GetStackArgumentSize()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return m_pComPlusCallInfo->GetStackArgumentSize();
    }

    void SetStackArgumentSize(WORD cbDstBuffer)
    {
        LIMITED_METHOD_CONTRACT;
        m_pComPlusCallInfo->SetStackArgumentSize(cbDstBuffer);
    }
#else // _TARGET_X86_
    void SetStackArgumentSize(WORD cbDstBuffer)
    {
        LIMITED_METHOD_CONTRACT;
    }
#endif // _TARGET_X86_
};
#endif // FEATURE_COMINTEROP

//-----------------------------------------------------------------------
// InstantiatedMethodDesc's are used for generics and
// come in four flavours, discriminated by the
// low order bits of the first field:
//
//  00 --> GenericMethodDefinition
//  01 --> UnsharedMethodInstantiation
//  10 --> SharedMethodInstantiation
//  11 --> WrapperStubWithInstantiations - and unboxing or instantiating stub
//
// A SharedMethodInstantiation descriptor extends MethodDesc
// with a pointer to dictionary layout and a representative instantiation.
//
// A GenericMethodDefinition is the instantiation of a
// generic method at its formals, used for verifying the method and
// also for reflection.
//
// A WrapperStubWithInstantiations extends MethodDesc with:
//    (1) a method instantiation
//    (2) an "underlying" method descriptor.
// A WrapperStubWithInstantiations may be placed in a MethodChunk for
// a method table which specifies an exact instantiation for the class/struct.
// A WrapperStubWithInstantiations may be either
// an BoxedEntryPointStub or an exact-instantiation stub.
//
// Exact-instantiation stubs are used as extra type-context parameters. When
// used as an entry, instantiating stubs pass an instantiation
// dictionary on to the underlying method.  These entries are required to
// implement ldftn instructions on instantiations of shared generic
// methods, as the InstantiatingStub's pointer does not expect a
// dictionary argument; instead, it passes itself on to the shared
// code as the dictionary.
//
// An UnsharedMethodInstantiation contains just an instantiation.
// These are fully-specialized wrt method and class type parameters.
// These satisfy (!IMD_IsGenericMethodDefinition() &&
//                !IMD_IsSharedByGenericMethodInstantiations() &&
//                !IMD_IsWrapperStubWithInstantiations())
//
// Note that plain MethodDescs may represent shared code w.r.t. class type
// parameters (see MethodDesc::IsSharedByGenericInstantiations()).
//-----------------------------------------------------------------------

class InstantiatedMethodDesc : public MethodDesc
{
#ifdef DACCESS_COMPILE
    friend class NativeImageDumper;
#endif

public:

    // All varities of InstantiatedMethodDesc's support this method.
    BOOL IMD_HasMethodInstantiation()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        if (IMD_IsGenericMethodDefinition())
            return TRUE;
        else
            return !m_pPerInstInfo.IsNull();
    }

    // All varieties of InstantiatedMethodDesc's support this method.
    Instantiation IMD_GetMethodInstantiation()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return Instantiation(IMD_GetMethodDictionary()->GetInstantiation(), m_wNumGenericArgs);
    }

    PTR_Dictionary IMD_GetMethodDictionary()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return ReadPointerMaybeNull(this, &InstantiatedMethodDesc::m_pPerInstInfo);
    }

    PTR_Dictionary IMD_GetMethodDictionaryNonNull()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return ReadPointer(this, &InstantiatedMethodDesc::m_pPerInstInfo);
    }

    BOOL IMD_IsGenericMethodDefinition()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return((m_wFlags2 & KindMask) == GenericMethodDefinition);
    }

    BOOL IMD_IsSharedByGenericMethodInstantiations()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return((m_wFlags2 & KindMask) == SharedMethodInstantiation);
    }
    BOOL IMD_IsWrapperStubWithInstantiations()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        return((m_wFlags2 & KindMask) == WrapperStubWithInstantiations);
    }

    BOOL IMD_IsEnCAddedMethod()
    {
        LIMITED_METHOD_CONTRACT;

#ifdef EnC_SUPPORTED
        return((m_wFlags2 & KindMask) == EnCAddedMethod);
#else
        return FALSE;
#endif
    }

#ifdef FEATURE_COMINTEROP
    BOOL IMD_HasComPlusCallInfo()
    {
        LIMITED_METHOD_CONTRACT;
        return ((m_wFlags2 & HasComPlusCallInfo) != 0);
    }

    void IMD_SetupGenericComPlusCall()
    {
        LIMITED_METHOD_CONTRACT;

        m_wFlags2 |= InstantiatedMethodDesc::HasComPlusCallInfo;

        IMD_GetComPlusCallInfo()->InitStackArgumentSize();
    }

    PTR_ComPlusCallInfo IMD_GetComPlusCallInfo()
    {
        LIMITED_METHOD_CONTRACT;

        _ASSERTE(IMD_HasComPlusCallInfo());
        SIZE_T size = s_ClassificationSizeTable[m_wFlags & (mdcClassification | mdcHasNonVtableSlot | mdcMethodImpl)];

        if (HasNativeCodeSlot())
        {
            size += (*dac_cast<PTR_TADDR>(dac_cast<TADDR>(this) + size) & FIXUP_LIST_MASK) ?
                (sizeof(NativeCodeSlot) + sizeof(FixupListSlot)) : sizeof(NativeCodeSlot);
        }

        return dac_cast<PTR_ComPlusCallInfo>(dac_cast<TADDR>(this) + size);
    }
#endif // FEATURE_COMINTEROP

    PTR_DictionaryLayout GetDictLayoutRaw()
    {
        LIMITED_METHOD_DAC_CONTRACT;
        return RelativePointer<PTR_DictionaryLayout>::GetValueMaybeNullAtPtr(PTR_HOST_MEMBER_TADDR(InstantiatedMethodDesc, this, m_pDictLayout));
    }

    PTR_MethodDesc IMD_GetWrappedMethodDesc()
    {
        LIMITED_METHOD_DAC_CONTRACT;

        _ASSERTE(IMD_IsWrapperStubWithInstantiations());
        return RelativeFixupPointer<PTR_MethodDesc>::GetValueAtPtr(PTR_HOST_MEMBER_TADDR(InstantiatedMethodDesc, this, m_pWrappedMethodDesc));
    }

#ifndef DACCESS_COMPILE
    // Get the dictionary layout, if there is one
    DictionaryLayout* IMD_GetDictionaryLayout()
    {
        WRAPPER_NO_CONTRACT;
        if (IMD_IsWrapperStubWithInstantiations() && IMD_HasMethodInstantiation())
        {
            InstantiatedMethodDesc* pIMD = IMD_GetWrappedMethodDesc()->AsInstantiatedMethodDesc();
            return pIMD->m_pDictLayout.GetValueMaybeNull();
        }
        else
        if (IMD_IsSharedByGenericMethodInstantiations())
            return m_pDictLayout.GetValueMaybeNull();
        else
            return NULL;
    }
#endif // !DACCESS_COMPILE

    // Setup the IMD as shared code
    void SetupSharedMethodInstantiation(DWORD numGenericArgs, TypeHandle *pPerInstInfo, DictionaryLayout *pDL);

    // Setup the IMD as unshared code
    void SetupUnsharedMethodInstantiation(DWORD numGenericArgs, TypeHandle *pInst);

    // Setup the IMD as the special MethodDesc for a "generic" method
    void SetupGenericMethodDefinition(IMDInternalImport *pIMDII, LoaderAllocator* pAllocator, AllocMemTracker *pamTracker,
        Module *pModule, mdMethodDef tok);

    // Setup the IMD as a wrapper around another method desc
    void SetupWrapperStubWithInstantiations(MethodDesc* wrappedMD,DWORD numGenericArgs, TypeHandle *pGenericMethodInst);
    

#ifdef EnC_SUPPORTED
    void SetupEnCAddedMethod()
    {
        LIMITED_METHOD_CONTRACT;
        m_wFlags2 = EnCAddedMethod;
    }
#endif

private:
    enum
    {
        KindMask                            = 0x07,
        GenericMethodDefinition             = 0x00,
        UnsharedMethodInstantiation         = 0x01,
        SharedMethodInstantiation           = 0x02,
        WrapperStubWithInstantiations       = 0x03,

#ifdef EnC_SUPPORTED
        // Non-virtual method added through EditAndContinue.
        EnCAddedMethod                      = 0x07,
#endif // EnC_SUPPORTED

        Unrestored                          = 0x08,

#ifdef FEATURE_COMINTEROP
        HasComPlusCallInfo                  = 0x10, // this IMD contains an optional ComPlusCallInfo
#endif // FEATURE_COMINTEROP
    };

    friend class MethodDesc; // this fields are currently accessed by MethodDesc::Save/Restore etc.
    union {
        RelativePointer<PTR_DictionaryLayout> m_pDictLayout; //SharedMethodInstantiation

        RelativeFixupPointer<PTR_MethodDesc> m_pWrappedMethodDesc; // For WrapperStubWithInstantiations
    };

public: // <TODO>make private: JITinterface.cpp accesses through this </TODO>
    // Note we can't steal bits off m_pPerInstInfo as the JIT generates code to access through it!!

        // Type parameters to method (exact)
        // For non-unboxing instantiating stubs this is actually
        // a dictionary and further slots may hang off the end of the
        // instantiation.
        //
        // For generic method definitions that are not the typical method definition (e.g. C<int>.m<U>)
        // this field is null; to obtain the instantiation use LoadMethodInstantiation
#if defined(FEATURE_NGEN_RELOCS_OPTIMIZATIONS)
    RelativePointer<PTR_Dictionary> m_pPerInstInfo;  //SHARED
#else
    PlainPointer<PTR_Dictionary> m_pPerInstInfo;  //SHARED
#endif

private:
    WORD          m_wFlags2;
    WORD          m_wNumGenericArgs;

public:
    static InstantiatedMethodDesc *FindOrCreateExactClassMethod(MethodTable *pExactMT,
                                                                MethodDesc *pCanonicalMD);

    static InstantiatedMethodDesc* FindLoadedInstantiatedMethodDesc(MethodTable *pMT,
                                                                    mdMethodDef methodDef,
                                                                    Instantiation methodInst,
                                                                    BOOL getSharedNotStub);

private:

    static InstantiatedMethodDesc *NewInstantiatedMethodDesc(MethodTable *pMT,
                                                             MethodDesc* pGenericMDescInRepMT,
                                                             MethodDesc* pSharedMDescForStub,
                                                             Instantiation methodInst,
                                                             BOOL getSharedNotStub);

};

inline PTR_MethodTable MethodDesc::GetMethodTable_NoLogging() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    MethodDescChunk *pChunk = GetMethodDescChunk();
    PREFIX_ASSUME(pChunk != NULL);
    return pChunk->GetMethodTable();
}

inline PTR_MethodTable MethodDesc::GetMethodTable() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    g_IBCLogger.LogMethodDescAccess(this);
    return GetMethodTable_NoLogging();
}

inline DPTR(RelativeFixupPointer<PTR_MethodTable>) MethodDesc::GetMethodTablePtr() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    MethodDescChunk *pChunk = GetMethodDescChunk();
    PREFIX_ASSUME(pChunk != NULL);
    return pChunk->GetMethodTablePtr();
}

inline MethodTable* MethodDesc::GetCanonicalMethodTable()
{
    LIMITED_METHOD_DAC_CONTRACT;

    return GetMethodTable()->GetCanonicalMethodTable();
}

inline mdMethodDef MethodDesc::GetMemberDef_NoLogging() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    MethodDescChunk *pChunk = GetMethodDescChunk();
    PREFIX_ASSUME(pChunk != NULL);
    UINT16   tokrange = pChunk->GetTokRange();

    UINT16 tokremainder = m_wFlags3AndTokenRemainder & enum_flag3_TokenRemainderMask;
    static_assert_no_msg(enum_flag3_TokenRemainderMask == METHOD_TOKEN_REMAINDER_MASK);

    return MergeToken(tokrange, tokremainder);
}

inline mdMethodDef MethodDesc::GetMemberDef() const
{
    LIMITED_METHOD_DAC_CONTRACT;
    g_IBCLogger.LogMethodDescAccess(this);
    return GetMemberDef_NoLogging();
}

// Set the offset of this method desc in a chunk table (which allows us
// to work back to the method table/module pointer stored at the head of
// the table.
inline void MethodDesc::SetChunkIndex(MethodDescChunk * pChunk)
{
    WRAPPER_NO_CONTRACT;

    // Calculate the offset (mod 8) from the chunk table header.
    SIZE_T offset = (BYTE*)this - (BYTE*)pChunk->GetFirstMethodDesc();
    _ASSERTE((offset & ALIGNMENT_MASK) == 0);
    offset >>= ALIGNMENT_SHIFT;

    // Make sure that we did not overflow the BYTE
    _ASSERTE(offset == (BYTE)offset);
    m_chunkIndex = (BYTE)offset;

    // Make sure that the MethodDescChunk is setup correctly
    _ASSERTE(GetMethodDescChunk() == pChunk);
}

inline void MethodDesc::SetMemberDef(mdMethodDef mb)
{
    WRAPPER_NO_CONTRACT;

    UINT16 tokrange;
    UINT16 tokremainder;
    SplitToken(mb, &tokrange, &tokremainder);

    _ASSERTE((tokremainder & ~enum_flag3_TokenRemainderMask) == 0);
    m_wFlags3AndTokenRemainder = (m_wFlags3AndTokenRemainder & ~enum_flag3_TokenRemainderMask) | tokremainder;

    if (GetMethodDescIndex() == 0)
    {
        GetMethodDescChunk()->SetTokenRange(tokrange);
    }

#ifdef _DEBUG
    if (mb != 0)
    {
        _ASSERTE(GetMemberDef_NoLogging() == mb);
    }
#endif
}

#ifdef _DEBUG 

inline BOOL MethodDesc::SanityCheck()
{
    CONTRACTL
    {
        NOTHROW;
        GC_NOTRIGGER;
        MODE_ANY;
        SUPPORTS_DAC;
    }
    CONTRACTL_END;


    // Do a simple sanity test
    if (IsRestored())
    {
        // If it looks good, do a more intensive sanity test. We don't care about the result,
        // we just want it to not AV.
        return GetMethodTable() == m_pDebugMethodTable.GetValue() && this->GetModule() != NULL;
    }
    
    return TRUE;
}

#endif // _DEBUG

inline BOOL MethodDesc::IsEnCAddedMethod()
{
    LIMITED_METHOD_DAC_CONTRACT;

    return (GetClassification() == mcInstantiated) && AsInstantiatedMethodDesc()->IMD_IsEnCAddedMethod();
}

inline BOOL MethodDesc::HasNonVtableSlot()
{
    LIMITED_METHOD_DAC_CONTRACT;

    return (m_wFlags & mdcHasNonVtableSlot) != 0;
}

inline Instantiation MethodDesc::GetMethodInstantiation() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    return
        (GetClassification() == mcInstantiated)
        ? AsInstantiatedMethodDesc()->IMD_GetMethodInstantiation()
        : Instantiation();
}

inline Instantiation MethodDesc::GetClassInstantiation() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    return GetMethodTable()->GetInstantiation();
}

inline BOOL MethodDesc::IsGenericMethodDefinition() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    g_IBCLogger.LogMethodDescAccess(this);
    return GetClassification() == mcInstantiated && AsInstantiatedMethodDesc()->IMD_IsGenericMethodDefinition();
}

// True if the method descriptor is an instantiation of a generic method.
inline BOOL MethodDesc::HasMethodInstantiation() const
{
    LIMITED_METHOD_DAC_CONTRACT;

    return mcInstantiated == GetClassification() && AsInstantiatedMethodDesc()->IMD_HasMethodInstantiation();
}

#if defined(FEATURE_GDBJIT)
class CalledMethod
{
private:
    MethodDesc * m_pMD;
    void * m_CallAddr;
    CalledMethod * m_pNext;
public:
    CalledMethod(MethodDesc *pMD, void * addr, CalledMethod * next) : m_pMD(pMD), m_CallAddr(addr), m_pNext(next)  {}
    ~CalledMethod() {}
    MethodDesc * GetMethodDesc() { return m_pMD; }
    void * GetCallAddr() { return m_CallAddr; }
    CalledMethod * GetNext() { return m_pNext; }
};
#endif

#include "method.inl"

#endif // !_METHOD_H