aboutsummaryrefslogtreecommitdiff
path: root/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c
blob: 6ce3dadd4e849d527a0e8fbef20cfc1cc0ec8da4 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Copyright (c) 2013, Joyent Inc. All rights reserved.
 * Copyright (c) 2013 by Delphix. All rights reserved.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * DTrace D Language Parser
 *
 * The D Parser is a lex/yacc parser consisting of the lexer dt_lex.l, the
 * parsing grammar dt_grammar.y, and this file, dt_parser.c, which handles
 * the construction of the parse tree nodes and their syntactic validation.
 * The parse tree is constructed of dt_node_t structures (see <dt_parser.h>)
 * that are built in two passes: (1) the "create" pass, where the parse tree
 * nodes are allocated by calls from the grammar to dt_node_*() subroutines,
 * and (2) the "cook" pass, where nodes are coalesced, assigned D types, and
 * validated according to the syntactic rules of the language.
 *
 * All node allocations are performed using dt_node_alloc().  All node frees
 * during the parsing phase are performed by dt_node_free(), which frees node-
 * internal state but does not actually free the nodes.  All final node frees
 * are done as part of the end of dt_compile() or as part of destroying
 * persistent identifiers or translators which have embedded nodes.
 *
 * The dt_node_* routines that implement pass (1) may allocate new nodes.  The
 * dt_cook_* routines that implement pass (2) may *not* allocate new nodes.
 * They may free existing nodes using dt_node_free(), but they may not actually
 * deallocate any dt_node_t's.  Currently dt_cook_op2() is an exception to this
 * rule: see the comments therein for how this issue is resolved.
 *
 * The dt_cook_* routines are responsible for (at minimum) setting the final
 * node type (dn_ctfp/dn_type) and attributes (dn_attr).  If dn_ctfp/dn_type
 * are set manually (i.e. not by one of the type assignment functions), then
 * the DT_NF_COOKED flag must be set manually on the node.
 *
 * The cooking pass can be applied to the same parse tree more than once (used
 * in the case of a comma-separated list of probe descriptions).  As such, the
 * cook routines must not perform any parse tree transformations which would
 * be invalid if the tree were subsequently cooked using a different context.
 *
 * The dn_ctfp and dn_type fields form the type of the node.  This tuple can
 * take on the following set of values, which form our type invariants:
 *
 * 1. dn_ctfp = NULL, dn_type = CTF_ERR
 *
 *    In this state, the node has unknown type and is not yet cooked.  The
 *    DT_NF_COOKED flag is not yet set on the node.
 *
 * 2. dn_ctfp = DT_DYN_CTFP(dtp), dn_type = DT_DYN_TYPE(dtp)
 *
 *    In this state, the node is a dynamic D type.  This means that generic
 *    operations are not valid on this node and only code that knows how to
 *    examine the inner details of the node can operate on it.  A <DYN> node
 *    must have dn_ident set to point to an identifier describing the object
 *    and its type.  The DT_NF_REF flag is set for all nodes of type <DYN>.
 *    At present, the D compiler uses the <DYN> type for:
 *
 *    - associative arrays that do not yet have a value type defined
 *    - translated data (i.e. the result of the xlate operator)
 *    - aggregations
 *
 * 3. dn_ctfp = DT_STR_CTFP(dtp), dn_type = DT_STR_TYPE(dtp)
 *
 *    In this state, the node is of type D string.  The string type is really
 *    a char[0] typedef, but requires special handling throughout the compiler.
 *
 * 4. dn_ctfp != NULL, dn_type = any other type ID
 *
 *    In this state, the node is of some known D/CTF type.  The normal libctf
 *    APIs can be used to learn more about the type name or structure.  When
 *    the type is assigned, the DT_NF_SIGNED, DT_NF_REF, and DT_NF_BITFIELD
 *    flags cache the corresponding attributes of the underlying CTF type.
 */

#include <sys/param.h>
#include <sys/sysmacros.h>
#include <limits.h>
#include <setjmp.h>
#include <strings.h>
#include <assert.h>
#if defined(sun)
#include <alloca.h>
#endif
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>

#include <dt_impl.h>
#include <dt_grammar.h>
#include <dt_module.h>
#include <dt_provider.h>
#include <dt_string.h>
#include <dt_as.h>

dt_pcb_t *yypcb;	/* current control block for parser */
dt_node_t *yypragma;	/* lex token list for control lines */
char yyintprefix;	/* int token macro prefix (+/-) */
char yyintsuffix[4];	/* int token suffix string [uU][lL] */
int yyintdecimal;	/* int token format flag (1=decimal, 0=octal/hex) */

static const char *
opstr(int op)
{
	switch (op) {
	case DT_TOK_COMMA:	return (",");
	case DT_TOK_ELLIPSIS:	return ("...");
	case DT_TOK_ASGN:	return ("=");
	case DT_TOK_ADD_EQ:	return ("+=");
	case DT_TOK_SUB_EQ:	return ("-=");
	case DT_TOK_MUL_EQ:	return ("*=");
	case DT_TOK_DIV_EQ:	return ("/=");
	case DT_TOK_MOD_EQ:	return ("%=");
	case DT_TOK_AND_EQ:	return ("&=");
	case DT_TOK_XOR_EQ:	return ("^=");
	case DT_TOK_OR_EQ:	return ("|=");
	case DT_TOK_LSH_EQ:	return ("<<=");
	case DT_TOK_RSH_EQ:	return (">>=");
	case DT_TOK_QUESTION:	return ("?");
	case DT_TOK_COLON:	return (":");
	case DT_TOK_LOR:	return ("||");
	case DT_TOK_LXOR:	return ("^^");
	case DT_TOK_LAND:	return ("&&");
	case DT_TOK_BOR:	return ("|");
	case DT_TOK_XOR:	return ("^");
	case DT_TOK_BAND:	return ("&");
	case DT_TOK_EQU:	return ("==");
	case DT_TOK_NEQ:	return ("!=");
	case DT_TOK_LT:		return ("<");
	case DT_TOK_LE:		return ("<=");
	case DT_TOK_GT:		return (">");
	case DT_TOK_GE:		return (">=");
	case DT_TOK_LSH:	return ("<<");
	case DT_TOK_RSH:	return (">>");
	case DT_TOK_ADD:	return ("+");
	case DT_TOK_SUB:	return ("-");
	case DT_TOK_MUL:	return ("*");
	case DT_TOK_DIV:	return ("/");
	case DT_TOK_MOD:	return ("%");
	case DT_TOK_LNEG:	return ("!");
	case DT_TOK_BNEG:	return ("~");
	case DT_TOK_ADDADD:	return ("++");
	case DT_TOK_PREINC:	return ("++");
	case DT_TOK_POSTINC:	return ("++");
	case DT_TOK_SUBSUB:	return ("--");
	case DT_TOK_PREDEC:	return ("--");
	case DT_TOK_POSTDEC:	return ("--");
	case DT_TOK_IPOS:	return ("+");
	case DT_TOK_INEG:	return ("-");
	case DT_TOK_DEREF:	return ("*");
	case DT_TOK_ADDROF:	return ("&");
	case DT_TOK_OFFSETOF:	return ("offsetof");
	case DT_TOK_SIZEOF:	return ("sizeof");
	case DT_TOK_STRINGOF:	return ("stringof");
	case DT_TOK_XLATE:	return ("xlate");
	case DT_TOK_LPAR:	return ("(");
	case DT_TOK_RPAR:	return (")");
	case DT_TOK_LBRAC:	return ("[");
	case DT_TOK_RBRAC:	return ("]");
	case DT_TOK_PTR:	return ("->");
	case DT_TOK_DOT:	return (".");
	case DT_TOK_STRING:	return ("<string>");
	case DT_TOK_IDENT:	return ("<ident>");
	case DT_TOK_TNAME:	return ("<type>");
	case DT_TOK_INT:	return ("<int>");
	default:		return ("<?>");
	}
}

int
dt_type_lookup(const char *s, dtrace_typeinfo_t *tip)
{
	static const char delimiters[] = " \t\n\r\v\f*`";
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	const char *p, *q, *r, *end, *obj;

	for (p = s, end = s + strlen(s); *p != '\0'; p = q) {
		while (isspace(*p))
			p++;	/* skip leading whitespace prior to token */

		if (p == end || (q = strpbrk(p + 1, delimiters)) == NULL)
			break;	/* empty string or single token remaining */

		if (*q == '`') {
			char *object = alloca((size_t)(q - p) + 1);
			char *type = alloca((size_t)(end - s) + 1);

			/*
			 * Copy from the start of the token (p) to the location
			 * backquote (q) to extract the nul-terminated object.
			 */
			bcopy(p, object, (size_t)(q - p));
			object[(size_t)(q - p)] = '\0';

			/*
			 * Copy the original string up to the start of this
			 * token (p) into type, and then concatenate everything
			 * after q.  This is the type name without the object.
			 */
			bcopy(s, type, (size_t)(p - s));
			bcopy(q + 1, type + (size_t)(p - s), strlen(q + 1) + 1);

			/*
			 * There may be at most three delimeters. The second
			 * delimeter is usually used to distinguish the type
			 * within a given module, however, there could be a link
			 * map id on the scene in which case that delimeter
			 * would be the third. We determine presence of the lmid
			 * if it rouglhly meets the from LM[0-9]
			 */
			if ((r = strchr(q + 1, '`')) != NULL &&
			    ((r = strchr(r + 1, '`')) != NULL)) {
				if (strchr(r + 1, '`') != NULL)
					return (dt_set_errno(dtp,
					    EDT_BADSCOPE));
				if (q[1] != 'L' || q[2] != 'M')
					return (dt_set_errno(dtp,
					    EDT_BADSCOPE));
			}

			return (dtrace_lookup_by_type(dtp, object, type, tip));
		}
	}

	if (yypcb->pcb_idepth != 0)
		obj = DTRACE_OBJ_CDEFS;
	else
		obj = DTRACE_OBJ_EVERY;

	return (dtrace_lookup_by_type(dtp, obj, s, tip));
}

/*
 * When we parse type expressions or parse an expression with unary "&", we
 * need to find a type that is a pointer to a previously known type.
 * Unfortunately CTF is limited to a per-container view, so ctf_type_pointer()
 * alone does not suffice for our needs.  We provide a more intelligent wrapper
 * for the compiler that attempts to compute a pointer to either the given type
 * or its base (that is, we try both "foo_t *" and "struct foo *"), and also
 * to potentially construct the required type on-the-fly.
 */
int
dt_type_pointer(dtrace_typeinfo_t *tip)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	ctf_file_t *ctfp = tip->dtt_ctfp;
	ctf_id_t type = tip->dtt_type;
	ctf_id_t base = ctf_type_resolve(ctfp, type);
	uint_t bflags = tip->dtt_flags;

	dt_module_t *dmp;
	ctf_id_t ptr;

	if ((ptr = ctf_type_pointer(ctfp, type)) != CTF_ERR ||
	    (ptr = ctf_type_pointer(ctfp, base)) != CTF_ERR) {
		tip->dtt_type = ptr;
		return (0);
	}

	if (yypcb->pcb_idepth != 0)
		dmp = dtp->dt_cdefs;
	else
		dmp = dtp->dt_ddefs;

	if (ctfp != dmp->dm_ctfp && ctfp != ctf_parent_file(dmp->dm_ctfp) &&
	    (type = ctf_add_type(dmp->dm_ctfp, ctfp, type)) == CTF_ERR) {
		dtp->dt_ctferr = ctf_errno(dmp->dm_ctfp);
		return (dt_set_errno(dtp, EDT_CTF));
	}

	ptr = ctf_add_pointer(dmp->dm_ctfp, CTF_ADD_ROOT, type);

	if (ptr == CTF_ERR || ctf_update(dmp->dm_ctfp) == CTF_ERR) {
		dtp->dt_ctferr = ctf_errno(dmp->dm_ctfp);
		return (dt_set_errno(dtp, EDT_CTF));
	}

	tip->dtt_object = dmp->dm_name;
	tip->dtt_ctfp = dmp->dm_ctfp;
	tip->dtt_type = ptr;
	tip->dtt_flags = bflags;

	return (0);
}

const char *
dt_type_name(ctf_file_t *ctfp, ctf_id_t type, char *buf, size_t len)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;

	if (ctfp == DT_FPTR_CTFP(dtp) && type == DT_FPTR_TYPE(dtp))
		(void) snprintf(buf, len, "function pointer");
	else if (ctfp == DT_FUNC_CTFP(dtp) && type == DT_FUNC_TYPE(dtp))
		(void) snprintf(buf, len, "function");
	else if (ctfp == DT_DYN_CTFP(dtp) && type == DT_DYN_TYPE(dtp))
		(void) snprintf(buf, len, "dynamic variable");
	else if (ctfp == NULL)
		(void) snprintf(buf, len, "<none>");
	else if (ctf_type_name(ctfp, type, buf, len) == NULL)
		(void) snprintf(buf, len, "unknown");

	return (buf);
}

/*
 * Perform the "usual arithmetic conversions" to determine which of the two
 * input operand types should be promoted and used as a result type.  The
 * rules for this are described in ISOC[6.3.1.8] and K&R[A6.5].
 */
static void
dt_type_promote(dt_node_t *lp, dt_node_t *rp, ctf_file_t **ofp, ctf_id_t *otype)
{
	ctf_file_t *lfp = lp->dn_ctfp;
	ctf_id_t ltype = lp->dn_type;

	ctf_file_t *rfp = rp->dn_ctfp;
	ctf_id_t rtype = rp->dn_type;

	ctf_id_t lbase = ctf_type_resolve(lfp, ltype);
	uint_t lkind = ctf_type_kind(lfp, lbase);

	ctf_id_t rbase = ctf_type_resolve(rfp, rtype);
	uint_t rkind = ctf_type_kind(rfp, rbase);

	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	ctf_encoding_t le, re;
	uint_t lrank, rrank;

	assert(lkind == CTF_K_INTEGER || lkind == CTF_K_ENUM);
	assert(rkind == CTF_K_INTEGER || rkind == CTF_K_ENUM);

	if (lkind == CTF_K_ENUM) {
		lfp = DT_INT_CTFP(dtp);
		ltype = lbase = DT_INT_TYPE(dtp);
	}

	if (rkind == CTF_K_ENUM) {
		rfp = DT_INT_CTFP(dtp);
		rtype = rbase = DT_INT_TYPE(dtp);
	}

	if (ctf_type_encoding(lfp, lbase, &le) == CTF_ERR) {
		yypcb->pcb_hdl->dt_ctferr = ctf_errno(lfp);
		longjmp(yypcb->pcb_jmpbuf, EDT_CTF);
	}

	if (ctf_type_encoding(rfp, rbase, &re) == CTF_ERR) {
		yypcb->pcb_hdl->dt_ctferr = ctf_errno(rfp);
		longjmp(yypcb->pcb_jmpbuf, EDT_CTF);
	}

	/*
	 * Compute an integer rank based on the size and unsigned status.
	 * If rank is identical, pick the "larger" of the equivalent types
	 * which we define as having a larger base ctf_id_t.  If rank is
	 * different, pick the type with the greater rank.
	 */
	lrank = le.cte_bits + ((le.cte_format & CTF_INT_SIGNED) == 0);
	rrank = re.cte_bits + ((re.cte_format & CTF_INT_SIGNED) == 0);

	if (lrank == rrank) {
		if (lbase - rbase < 0)
			goto return_rtype;
		else
			goto return_ltype;
	} else if (lrank > rrank) {
		goto return_ltype;
	} else
		goto return_rtype;

return_ltype:
	*ofp = lfp;
	*otype = ltype;
	return;

return_rtype:
	*ofp = rfp;
	*otype = rtype;
}

void
dt_node_promote(dt_node_t *lp, dt_node_t *rp, dt_node_t *dnp)
{
	dt_type_promote(lp, rp, &dnp->dn_ctfp, &dnp->dn_type);
	dt_node_type_assign(dnp, dnp->dn_ctfp, dnp->dn_type, B_FALSE);
	dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));
}

const char *
dt_node_name(const dt_node_t *dnp, char *buf, size_t len)
{
	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	const char *prefix = "", *suffix = "";
	const dtrace_syminfo_t *dts;
	char *s;

	switch (dnp->dn_kind) {
	case DT_NODE_INT:
		(void) snprintf(buf, len, "integer constant 0x%llx",
		    (u_longlong_t)dnp->dn_value);
		break;
	case DT_NODE_STRING:
		s = strchr2esc(dnp->dn_string, strlen(dnp->dn_string));
		(void) snprintf(buf, len, "string constant \"%s\"",
		    s != NULL ? s : dnp->dn_string);
		free(s);
		break;
	case DT_NODE_IDENT:
		(void) snprintf(buf, len, "identifier %s", dnp->dn_string);
		break;
	case DT_NODE_VAR:
	case DT_NODE_FUNC:
	case DT_NODE_AGG:
	case DT_NODE_INLINE:
		switch (dnp->dn_ident->di_kind) {
		case DT_IDENT_FUNC:
		case DT_IDENT_AGGFUNC:
		case DT_IDENT_ACTFUNC:
			suffix = "( )";
			break;
		case DT_IDENT_AGG:
			prefix = "@";
			break;
		}
		(void) snprintf(buf, len, "%s %s%s%s",
		    dt_idkind_name(dnp->dn_ident->di_kind),
		    prefix, dnp->dn_ident->di_name, suffix);
		break;
	case DT_NODE_SYM:
		dts = dnp->dn_ident->di_data;
		(void) snprintf(buf, len, "symbol %s`%s",
		    dts->dts_object, dts->dts_name);
		break;
	case DT_NODE_TYPE:
		(void) snprintf(buf, len, "type %s",
		    dt_node_type_name(dnp, n1, sizeof (n1)));
		break;
	case DT_NODE_OP1:
	case DT_NODE_OP2:
	case DT_NODE_OP3:
		(void) snprintf(buf, len, "operator %s", opstr(dnp->dn_op));
		break;
	case DT_NODE_DEXPR:
	case DT_NODE_DFUNC:
		if (dnp->dn_expr)
			return (dt_node_name(dnp->dn_expr, buf, len));
		(void) snprintf(buf, len, "%s", "statement");
		break;
	case DT_NODE_PDESC:
		if (dnp->dn_desc->dtpd_id == 0) {
			(void) snprintf(buf, len,
			    "probe description %s:%s:%s:%s",
			    dnp->dn_desc->dtpd_provider, dnp->dn_desc->dtpd_mod,
			    dnp->dn_desc->dtpd_func, dnp->dn_desc->dtpd_name);
		} else {
			(void) snprintf(buf, len, "probe description %u",
			    dnp->dn_desc->dtpd_id);
		}
		break;
	case DT_NODE_CLAUSE:
		(void) snprintf(buf, len, "%s", "clause");
		break;
	case DT_NODE_MEMBER:
		(void) snprintf(buf, len, "member %s", dnp->dn_membname);
		break;
	case DT_NODE_XLATOR:
		(void) snprintf(buf, len, "translator <%s> (%s)",
		    dt_type_name(dnp->dn_xlator->dx_dst_ctfp,
			dnp->dn_xlator->dx_dst_type, n1, sizeof (n1)),
		    dt_type_name(dnp->dn_xlator->dx_src_ctfp,
			dnp->dn_xlator->dx_src_type, n2, sizeof (n2)));
		break;
	case DT_NODE_PROG:
		(void) snprintf(buf, len, "%s", "program");
		break;
	default:
		(void) snprintf(buf, len, "node <%u>", dnp->dn_kind);
		break;
	}

	return (buf);
}

/*
 * dt_node_xalloc() can be used to create new parse nodes from any libdtrace
 * caller.  The caller is responsible for assigning dn_link appropriately.
 */
dt_node_t *
dt_node_xalloc(dtrace_hdl_t *dtp, int kind)
{
	dt_node_t *dnp = dt_alloc(dtp, sizeof (dt_node_t));

	if (dnp == NULL)
		return (NULL);

	dnp->dn_ctfp = NULL;
	dnp->dn_type = CTF_ERR;
	dnp->dn_kind = (uchar_t)kind;
	dnp->dn_flags = 0;
	dnp->dn_op = 0;
	dnp->dn_line = -1;
	dnp->dn_reg = -1;
	dnp->dn_attr = _dtrace_defattr;
	dnp->dn_list = NULL;
	dnp->dn_link = NULL;
	bzero(&dnp->dn_u, sizeof (dnp->dn_u));

	return (dnp);
}

/*
 * dt_node_alloc() is used to create new parse nodes from the parser.  It
 * assigns the node location based on the current lexer line number and places
 * the new node on the default allocation list.  If allocation fails, we
 * automatically longjmp the caller back to the enclosing compilation call.
 */
static dt_node_t *
dt_node_alloc(int kind)
{
	dt_node_t *dnp = dt_node_xalloc(yypcb->pcb_hdl, kind);

	if (dnp == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	dnp->dn_line = yylineno;
	dnp->dn_link = yypcb->pcb_list;
	yypcb->pcb_list = dnp;

	return (dnp);
}

void
dt_node_free(dt_node_t *dnp)
{
	uchar_t kind = dnp->dn_kind;

	dnp->dn_kind = DT_NODE_FREE;

	switch (kind) {
	case DT_NODE_STRING:
	case DT_NODE_IDENT:
	case DT_NODE_TYPE:
		free(dnp->dn_string);
		dnp->dn_string = NULL;
		break;

	case DT_NODE_VAR:
	case DT_NODE_FUNC:
	case DT_NODE_PROBE:
		if (dnp->dn_ident != NULL) {
			if (dnp->dn_ident->di_flags & DT_IDFLG_ORPHAN)
				dt_ident_destroy(dnp->dn_ident);
			dnp->dn_ident = NULL;
		}
		dt_node_list_free(&dnp->dn_args);
		break;

	case DT_NODE_OP1:
		if (dnp->dn_child != NULL) {
			dt_node_free(dnp->dn_child);
			dnp->dn_child = NULL;
		}
		break;

	case DT_NODE_OP3:
		if (dnp->dn_expr != NULL) {
			dt_node_free(dnp->dn_expr);
			dnp->dn_expr = NULL;
		}
		/*FALLTHRU*/
	case DT_NODE_OP2:
		if (dnp->dn_left != NULL) {
			dt_node_free(dnp->dn_left);
			dnp->dn_left = NULL;
		}
		if (dnp->dn_right != NULL) {
			dt_node_free(dnp->dn_right);
			dnp->dn_right = NULL;
		}
		break;

	case DT_NODE_DEXPR:
	case DT_NODE_DFUNC:
		if (dnp->dn_expr != NULL) {
			dt_node_free(dnp->dn_expr);
			dnp->dn_expr = NULL;
		}
		break;

	case DT_NODE_AGG:
		if (dnp->dn_aggfun != NULL) {
			dt_node_free(dnp->dn_aggfun);
			dnp->dn_aggfun = NULL;
		}
		dt_node_list_free(&dnp->dn_aggtup);
		break;

	case DT_NODE_PDESC:
		free(dnp->dn_spec);
		dnp->dn_spec = NULL;
		free(dnp->dn_desc);
		dnp->dn_desc = NULL;
		break;

	case DT_NODE_CLAUSE:
		if (dnp->dn_pred != NULL)
			dt_node_free(dnp->dn_pred);
		if (dnp->dn_locals != NULL)
			dt_idhash_destroy(dnp->dn_locals);
		dt_node_list_free(&dnp->dn_pdescs);
		dt_node_list_free(&dnp->dn_acts);
		break;

	case DT_NODE_MEMBER:
		free(dnp->dn_membname);
		dnp->dn_membname = NULL;
		if (dnp->dn_membexpr != NULL) {
			dt_node_free(dnp->dn_membexpr);
			dnp->dn_membexpr = NULL;
		}
		break;

	case DT_NODE_PROVIDER:
		dt_node_list_free(&dnp->dn_probes);
		free(dnp->dn_provname);
		dnp->dn_provname = NULL;
		break;

	case DT_NODE_PROG:
		dt_node_list_free(&dnp->dn_list);
		break;
	}
}

void
dt_node_attr_assign(dt_node_t *dnp, dtrace_attribute_t attr)
{
	if ((yypcb->pcb_cflags & DTRACE_C_EATTR) &&
	    (dt_attr_cmp(attr, yypcb->pcb_amin) < 0)) {
		char a[DTRACE_ATTR2STR_MAX];
		char s[BUFSIZ];

		dnerror(dnp, D_ATTR_MIN, "attributes for %s (%s) are less than "
		    "predefined minimum\n", dt_node_name(dnp, s, sizeof (s)),
		    dtrace_attr2str(attr, a, sizeof (a)));
	}

	dnp->dn_attr = attr;
}

void
dt_node_type_assign(dt_node_t *dnp, ctf_file_t *fp, ctf_id_t type,
    boolean_t user)
{
	ctf_id_t base = ctf_type_resolve(fp, type);
	uint_t kind = ctf_type_kind(fp, base);
	ctf_encoding_t e;

	dnp->dn_flags &=
	    ~(DT_NF_SIGNED | DT_NF_REF | DT_NF_BITFIELD | DT_NF_USERLAND);

	if (kind == CTF_K_INTEGER && ctf_type_encoding(fp, base, &e) == 0) {
		size_t size = e.cte_bits / NBBY;

		if (size > 8 || (e.cte_bits % NBBY) != 0 || (size & (size - 1)))
			dnp->dn_flags |= DT_NF_BITFIELD;

		if (e.cte_format & CTF_INT_SIGNED)
			dnp->dn_flags |= DT_NF_SIGNED;
	}

	if (kind == CTF_K_FLOAT && ctf_type_encoding(fp, base, &e) == 0) {
		if (e.cte_bits / NBBY > sizeof (uint64_t))
			dnp->dn_flags |= DT_NF_REF;
	}

	if (kind == CTF_K_STRUCT || kind == CTF_K_UNION ||
	    kind == CTF_K_FORWARD ||
	    kind == CTF_K_ARRAY || kind == CTF_K_FUNCTION)
		dnp->dn_flags |= DT_NF_REF;
	else if (yypcb != NULL && fp == DT_DYN_CTFP(yypcb->pcb_hdl) &&
	    type == DT_DYN_TYPE(yypcb->pcb_hdl))
		dnp->dn_flags |= DT_NF_REF;

	if (user)
		dnp->dn_flags |= DT_NF_USERLAND;

	dnp->dn_flags |= DT_NF_COOKED;
	dnp->dn_ctfp = fp;
	dnp->dn_type = type;
}

void
dt_node_type_propagate(const dt_node_t *src, dt_node_t *dst)
{
	assert(src->dn_flags & DT_NF_COOKED);
	dst->dn_flags = src->dn_flags & ~DT_NF_LVALUE;
	dst->dn_ctfp = src->dn_ctfp;
	dst->dn_type = src->dn_type;
}

const char *
dt_node_type_name(const dt_node_t *dnp, char *buf, size_t len)
{
	if (dt_node_is_dynamic(dnp) && dnp->dn_ident != NULL) {
		(void) snprintf(buf, len, "%s",
		    dt_idkind_name(dt_ident_resolve(dnp->dn_ident)->di_kind));
		return (buf);
	}

	if (dnp->dn_flags & DT_NF_USERLAND) {
		size_t n = snprintf(buf, len, "userland ");
		len = len > n ? len - n : 0;
		(void) dt_type_name(dnp->dn_ctfp, dnp->dn_type, buf + n, len);
		return (buf);
	}

	return (dt_type_name(dnp->dn_ctfp, dnp->dn_type, buf, len));
}

size_t
dt_node_type_size(const dt_node_t *dnp)
{
	ctf_id_t base;
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;

	if (dnp->dn_kind == DT_NODE_STRING)
		return (strlen(dnp->dn_string) + 1);

	if (dt_node_is_dynamic(dnp) && dnp->dn_ident != NULL)
		return (dt_ident_size(dnp->dn_ident));

	base = ctf_type_resolve(dnp->dn_ctfp, dnp->dn_type);

	if (ctf_type_kind(dnp->dn_ctfp, base) == CTF_K_FORWARD)
		return (0);

	/*
	 * Here we have a 32-bit user pointer that is being used with a 64-bit
	 * kernel. When we're using it and its tagged as a userland reference --
	 * then we need to keep it as a 32-bit pointer. However, if we are
	 * referring to it as a kernel address, eg. being used after a copyin()
	 * then we need to make sure that we actually return the kernel's size
	 * of a pointer, 8 bytes.
	 */
	if (ctf_type_kind(dnp->dn_ctfp, base) == CTF_K_POINTER &&
	    ctf_getmodel(dnp->dn_ctfp) == CTF_MODEL_ILP32 &&
	    !(dnp->dn_flags & DT_NF_USERLAND) &&
	    dtp->dt_conf.dtc_ctfmodel == CTF_MODEL_LP64)
			return (8);

	return (ctf_type_size(dnp->dn_ctfp, dnp->dn_type));
}

/*
 * Determine if the specified parse tree node references an identifier of the
 * specified kind, and if so return a pointer to it; otherwise return NULL.
 * This function resolves the identifier itself, following through any inlines.
 */
dt_ident_t *
dt_node_resolve(const dt_node_t *dnp, uint_t idkind)
{
	dt_ident_t *idp;

	switch (dnp->dn_kind) {
	case DT_NODE_VAR:
	case DT_NODE_SYM:
	case DT_NODE_FUNC:
	case DT_NODE_AGG:
	case DT_NODE_INLINE:
	case DT_NODE_PROBE:
		idp = dt_ident_resolve(dnp->dn_ident);
		return (idp->di_kind == idkind ? idp : NULL);
	}

	if (dt_node_is_dynamic(dnp)) {
		idp = dt_ident_resolve(dnp->dn_ident);
		return (idp->di_kind == idkind ? idp : NULL);
	}

	return (NULL);
}

size_t
dt_node_sizeof(const dt_node_t *dnp)
{
	dtrace_syminfo_t *sip;
	GElf_Sym sym;
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;

	/*
	 * The size of the node as used for the sizeof() operator depends on
	 * the kind of the node.  If the node is a SYM, the size is obtained
	 * from the symbol table; if it is not a SYM, the size is determined
	 * from the node's type.  This is slightly different from C's sizeof()
	 * operator in that (for example) when applied to a function, sizeof()
	 * will evaluate to the length of the function rather than the size of
	 * the function type.
	 */
	if (dnp->dn_kind != DT_NODE_SYM)
		return (dt_node_type_size(dnp));

	sip = dnp->dn_ident->di_data;

	if (dtrace_lookup_by_name(dtp, sip->dts_object,
	    sip->dts_name, &sym, NULL) == -1)
		return (0);

	return (sym.st_size);
}

int
dt_node_is_integer(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	ctf_encoding_t e;
	ctf_id_t type;
	uint_t kind;

	assert(dnp->dn_flags & DT_NF_COOKED);

	type = ctf_type_resolve(fp, dnp->dn_type);
	kind = ctf_type_kind(fp, type);

	if (kind == CTF_K_INTEGER &&
	    ctf_type_encoding(fp, type, &e) == 0 && IS_VOID(e))
		return (0); /* void integer */

	return (kind == CTF_K_INTEGER || kind == CTF_K_ENUM);
}

int
dt_node_is_float(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	ctf_encoding_t e;
	ctf_id_t type;
	uint_t kind;

	assert(dnp->dn_flags & DT_NF_COOKED);

	type = ctf_type_resolve(fp, dnp->dn_type);
	kind = ctf_type_kind(fp, type);

	return (kind == CTF_K_FLOAT &&
	    ctf_type_encoding(dnp->dn_ctfp, type, &e) == 0 && (
	    e.cte_format == CTF_FP_SINGLE || e.cte_format == CTF_FP_DOUBLE ||
	    e.cte_format == CTF_FP_LDOUBLE));
}

int
dt_node_is_scalar(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	ctf_encoding_t e;
	ctf_id_t type;
	uint_t kind;

	assert(dnp->dn_flags & DT_NF_COOKED);

	type = ctf_type_resolve(fp, dnp->dn_type);
	kind = ctf_type_kind(fp, type);

	if (kind == CTF_K_INTEGER &&
	    ctf_type_encoding(fp, type, &e) == 0 && IS_VOID(e))
		return (0); /* void cannot be used as a scalar */

	return (kind == CTF_K_INTEGER || kind == CTF_K_ENUM ||
	    kind == CTF_K_POINTER);
}

int
dt_node_is_arith(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	ctf_encoding_t e;
	ctf_id_t type;
	uint_t kind;

	assert(dnp->dn_flags & DT_NF_COOKED);

	type = ctf_type_resolve(fp, dnp->dn_type);
	kind = ctf_type_kind(fp, type);

	if (kind == CTF_K_INTEGER)
		return (ctf_type_encoding(fp, type, &e) == 0 && !IS_VOID(e));
	else
		return (kind == CTF_K_ENUM);
}

int
dt_node_is_vfptr(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	ctf_encoding_t e;
	ctf_id_t type;
	uint_t kind;

	assert(dnp->dn_flags & DT_NF_COOKED);

	type = ctf_type_resolve(fp, dnp->dn_type);
	if (ctf_type_kind(fp, type) != CTF_K_POINTER)
		return (0); /* type is not a pointer */

	type = ctf_type_resolve(fp, ctf_type_reference(fp, type));
	kind = ctf_type_kind(fp, type);

	return (kind == CTF_K_FUNCTION || (kind == CTF_K_INTEGER &&
	    ctf_type_encoding(fp, type, &e) == 0 && IS_VOID(e)));
}

int
dt_node_is_dynamic(const dt_node_t *dnp)
{
	if (dnp->dn_kind == DT_NODE_VAR &&
	    (dnp->dn_ident->di_flags & DT_IDFLG_INLINE)) {
		const dt_idnode_t *inp = dnp->dn_ident->di_iarg;
		return (inp->din_root ? dt_node_is_dynamic(inp->din_root) : 0);
	}

	return (dnp->dn_ctfp == DT_DYN_CTFP(yypcb->pcb_hdl) &&
	    dnp->dn_type == DT_DYN_TYPE(yypcb->pcb_hdl));
}

int
dt_node_is_string(const dt_node_t *dnp)
{
	return (dnp->dn_ctfp == DT_STR_CTFP(yypcb->pcb_hdl) &&
	    dnp->dn_type == DT_STR_TYPE(yypcb->pcb_hdl));
}

int
dt_node_is_stack(const dt_node_t *dnp)
{
	return (dnp->dn_ctfp == DT_STACK_CTFP(yypcb->pcb_hdl) &&
	    dnp->dn_type == DT_STACK_TYPE(yypcb->pcb_hdl));
}

int
dt_node_is_symaddr(const dt_node_t *dnp)
{
	return (dnp->dn_ctfp == DT_SYMADDR_CTFP(yypcb->pcb_hdl) &&
	    dnp->dn_type == DT_SYMADDR_TYPE(yypcb->pcb_hdl));
}

int
dt_node_is_usymaddr(const dt_node_t *dnp)
{
	return (dnp->dn_ctfp == DT_USYMADDR_CTFP(yypcb->pcb_hdl) &&
	    dnp->dn_type == DT_USYMADDR_TYPE(yypcb->pcb_hdl));
}

int
dt_node_is_strcompat(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	ctf_encoding_t e;
	ctf_arinfo_t r;
	ctf_id_t base;
	uint_t kind;

	assert(dnp->dn_flags & DT_NF_COOKED);

	base = ctf_type_resolve(fp, dnp->dn_type);
	kind = ctf_type_kind(fp, base);

	if (kind == CTF_K_POINTER &&
	    (base = ctf_type_reference(fp, base)) != CTF_ERR &&
	    (base = ctf_type_resolve(fp, base)) != CTF_ERR &&
	    ctf_type_encoding(fp, base, &e) == 0 && IS_CHAR(e))
		return (1); /* promote char pointer to string */

	if (kind == CTF_K_ARRAY && ctf_array_info(fp, base, &r) == 0 &&
	    (base = ctf_type_resolve(fp, r.ctr_contents)) != CTF_ERR &&
	    ctf_type_encoding(fp, base, &e) == 0 && IS_CHAR(e))
		return (1); /* promote char array to string */

	return (0);
}

int
dt_node_is_pointer(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	uint_t kind;

	assert(dnp->dn_flags & DT_NF_COOKED);

	if (dt_node_is_string(dnp))
		return (0); /* string are pass-by-ref but act like structs */

	kind = ctf_type_kind(fp, ctf_type_resolve(fp, dnp->dn_type));
	return (kind == CTF_K_POINTER || kind == CTF_K_ARRAY);
}

int
dt_node_is_void(const dt_node_t *dnp)
{
	ctf_file_t *fp = dnp->dn_ctfp;
	ctf_encoding_t e;
	ctf_id_t type;

	if (dt_node_is_dynamic(dnp))
		return (0); /* <DYN> is an alias for void but not the same */

	if (dt_node_is_stack(dnp))
		return (0);

	if (dt_node_is_symaddr(dnp) || dt_node_is_usymaddr(dnp))
		return (0);

	type = ctf_type_resolve(fp, dnp->dn_type);

	return (ctf_type_kind(fp, type) == CTF_K_INTEGER &&
	    ctf_type_encoding(fp, type, &e) == 0 && IS_VOID(e));
}

int
dt_node_is_ptrcompat(const dt_node_t *lp, const dt_node_t *rp,
    ctf_file_t **fpp, ctf_id_t *tp)
{
	ctf_file_t *lfp = lp->dn_ctfp;
	ctf_file_t *rfp = rp->dn_ctfp;

	ctf_id_t lbase = CTF_ERR, rbase = CTF_ERR;
	ctf_id_t lref = CTF_ERR, rref = CTF_ERR;

	int lp_is_void, rp_is_void, lp_is_int, rp_is_int, compat;
	uint_t lkind, rkind;
	ctf_encoding_t e;
	ctf_arinfo_t r;

	assert(lp->dn_flags & DT_NF_COOKED);
	assert(rp->dn_flags & DT_NF_COOKED);

	if (dt_node_is_dynamic(lp) || dt_node_is_dynamic(rp))
		return (0); /* fail if either node is a dynamic variable */

	lp_is_int = dt_node_is_integer(lp);
	rp_is_int = dt_node_is_integer(rp);

	if (lp_is_int && rp_is_int)
		return (0); /* fail if both nodes are integers */

	if (lp_is_int && (lp->dn_kind != DT_NODE_INT || lp->dn_value != 0))
		return (0); /* fail if lp is an integer that isn't 0 constant */

	if (rp_is_int && (rp->dn_kind != DT_NODE_INT || rp->dn_value != 0))
		return (0); /* fail if rp is an integer that isn't 0 constant */

	if ((lp_is_int == 0 && rp_is_int == 0) && (
	    (lp->dn_flags & DT_NF_USERLAND) ^ (rp->dn_flags & DT_NF_USERLAND)))
		return (0); /* fail if only one pointer is a userland address */

	/*
	 * Resolve the left-hand and right-hand types to their base type, and
	 * then resolve the referenced type as well (assuming the base type
	 * is CTF_K_POINTER or CTF_K_ARRAY).  Otherwise [lr]ref = CTF_ERR.
	 */
	if (!lp_is_int) {
		lbase = ctf_type_resolve(lfp, lp->dn_type);
		lkind = ctf_type_kind(lfp, lbase);

		if (lkind == CTF_K_POINTER) {
			lref = ctf_type_resolve(lfp,
			    ctf_type_reference(lfp, lbase));
		} else if (lkind == CTF_K_ARRAY &&
		    ctf_array_info(lfp, lbase, &r) == 0) {
			lref = ctf_type_resolve(lfp, r.ctr_contents);
		}
	}

	if (!rp_is_int) {
		rbase = ctf_type_resolve(rfp, rp->dn_type);
		rkind = ctf_type_kind(rfp, rbase);

		if (rkind == CTF_K_POINTER) {
			rref = ctf_type_resolve(rfp,
			    ctf_type_reference(rfp, rbase));
		} else if (rkind == CTF_K_ARRAY &&
		    ctf_array_info(rfp, rbase, &r) == 0) {
			rref = ctf_type_resolve(rfp, r.ctr_contents);
		}
	}

	/*
	 * We know that one or the other type may still be a zero-valued
	 * integer constant.  To simplify the code below, set the integer
	 * type variables equal to the non-integer types and proceed.
	 */
	if (lp_is_int) {
		lbase = rbase;
		lkind = rkind;
		lref = rref;
		lfp = rfp;
	} else if (rp_is_int) {
		rbase = lbase;
		rkind = lkind;
		rref = lref;
		rfp = lfp;
	}

	lp_is_void = ctf_type_encoding(lfp, lref, &e) == 0 && IS_VOID(e);
	rp_is_void = ctf_type_encoding(rfp, rref, &e) == 0 && IS_VOID(e);

	/*
	 * The types are compatible if both are pointers to the same type, or
	 * if either pointer is a void pointer.  If they are compatible, set
	 * tp to point to the more specific pointer type and return it.
	 */
	compat = (lkind == CTF_K_POINTER || lkind == CTF_K_ARRAY) &&
	    (rkind == CTF_K_POINTER || rkind == CTF_K_ARRAY) &&
	    (lp_is_void || rp_is_void || ctf_type_compat(lfp, lref, rfp, rref));

	if (compat) {
		if (fpp != NULL)
			*fpp = rp_is_void ? lfp : rfp;
		if (tp != NULL)
			*tp = rp_is_void ? lbase : rbase;
	}

	return (compat);
}

/*
 * The rules for checking argument types against parameter types are described
 * in the ANSI-C spec (see K&R[A7.3.2] and K&R[A7.17]).  We use the same rule
 * set to determine whether associative array arguments match the prototype.
 */
int
dt_node_is_argcompat(const dt_node_t *lp, const dt_node_t *rp)
{
	ctf_file_t *lfp = lp->dn_ctfp;
	ctf_file_t *rfp = rp->dn_ctfp;

	assert(lp->dn_flags & DT_NF_COOKED);
	assert(rp->dn_flags & DT_NF_COOKED);

	if (dt_node_is_integer(lp) && dt_node_is_integer(rp))
		return (1); /* integer types are compatible */

	if (dt_node_is_strcompat(lp) && dt_node_is_strcompat(rp))
		return (1); /* string types are compatible */

	if (dt_node_is_stack(lp) && dt_node_is_stack(rp))
		return (1); /* stack types are compatible */

	if (dt_node_is_symaddr(lp) && dt_node_is_symaddr(rp))
		return (1); /* symaddr types are compatible */

	if (dt_node_is_usymaddr(lp) && dt_node_is_usymaddr(rp))
		return (1); /* usymaddr types are compatible */

	switch (ctf_type_kind(lfp, ctf_type_resolve(lfp, lp->dn_type))) {
	case CTF_K_FUNCTION:
	case CTF_K_STRUCT:
	case CTF_K_UNION:
		return (ctf_type_compat(lfp, lp->dn_type, rfp, rp->dn_type));
	default:
		return (dt_node_is_ptrcompat(lp, rp, NULL, NULL));
	}
}

/*
 * We provide dt_node_is_posconst() as a convenience routine for callers who
 * wish to verify that an argument is a positive non-zero integer constant.
 */
int
dt_node_is_posconst(const dt_node_t *dnp)
{
	return (dnp->dn_kind == DT_NODE_INT && dnp->dn_value != 0 && (
	    (dnp->dn_flags & DT_NF_SIGNED) == 0 || (int64_t)dnp->dn_value > 0));
}

int
dt_node_is_actfunc(const dt_node_t *dnp)
{
	return (dnp->dn_kind == DT_NODE_FUNC &&
	    dnp->dn_ident->di_kind == DT_IDENT_ACTFUNC);
}

/*
 * The original rules for integer constant typing are described in K&R[A2.5.1].
 * However, since we support long long, we instead use the rules from ISO C99
 * clause 6.4.4.1 since that is where long longs are formally described.  The
 * rules require us to know whether the constant was specified in decimal or
 * in octal or hex, which we do by looking at our lexer's 'yyintdecimal' flag.
 * The type of an integer constant is the first of the corresponding list in
 * which its value can be represented:
 *
 * unsuffixed decimal:   int, long, long long
 * unsuffixed oct/hex:   int, unsigned int, long, unsigned long,
 *                       long long, unsigned long long
 * suffix [uU]:          unsigned int, unsigned long, unsigned long long
 * suffix [lL] decimal:  long, long long
 * suffix [lL] oct/hex:  long, unsigned long, long long, unsigned long long
 * suffix [uU][Ll]:      unsigned long, unsigned long long
 * suffix ll/LL decimal: long long
 * suffix ll/LL oct/hex: long long, unsigned long long
 * suffix [uU][ll/LL]:   unsigned long long
 *
 * Given that our lexer has already validated the suffixes by regexp matching,
 * there is an obvious way to concisely encode these rules: construct an array
 * of the types in the order int, unsigned int, long, unsigned long, long long,
 * unsigned long long.  Compute an integer array starting index based on the
 * suffix (e.g. none = 0, u = 1, ull = 5), and compute an increment based on
 * the specifier (dec/oct/hex) and suffix (u).  Then iterate from the starting
 * index to the end, advancing using the increment, and searching until we
 * find a limit that matches or we run out of choices (overflow).  To make it
 * even faster, we precompute the table of type information in dtrace_open().
 */
dt_node_t *
dt_node_int(uintmax_t value)
{
	dt_node_t *dnp = dt_node_alloc(DT_NODE_INT);
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;

	int n = (yyintdecimal | (yyintsuffix[0] == 'u')) + 1;
	int i = 0;

	const char *p;
	char c;

	dnp->dn_op = DT_TOK_INT;
	dnp->dn_value = value;

	for (p = yyintsuffix; (c = *p) != '\0'; p++) {
		if (c == 'U' || c == 'u')
			i += 1;
		else if (c == 'L' || c == 'l')
			i += 2;
	}

	for (; i < sizeof (dtp->dt_ints) / sizeof (dtp->dt_ints[0]); i += n) {
		if (value <= dtp->dt_ints[i].did_limit) {
			dt_node_type_assign(dnp,
			    dtp->dt_ints[i].did_ctfp,
			    dtp->dt_ints[i].did_type, B_FALSE);

			/*
			 * If a prefix character is present in macro text, add
			 * in the corresponding operator node (see dt_lex.l).
			 */
			switch (yyintprefix) {
			case '+':
				return (dt_node_op1(DT_TOK_IPOS, dnp));
			case '-':
				return (dt_node_op1(DT_TOK_INEG, dnp));
			default:
				return (dnp);
			}
		}
	}

	xyerror(D_INT_OFLOW, "integer constant 0x%llx cannot be represented "
	    "in any built-in integral type\n", (u_longlong_t)value);
	/*NOTREACHED*/
	return (NULL);		/* keep gcc happy */
}

dt_node_t *
dt_node_string(char *string)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_node_t *dnp;

	if (string == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	dnp = dt_node_alloc(DT_NODE_STRING);
	dnp->dn_op = DT_TOK_STRING;
	dnp->dn_string = string;
	dt_node_type_assign(dnp, DT_STR_CTFP(dtp), DT_STR_TYPE(dtp), B_FALSE);

	return (dnp);
}

dt_node_t *
dt_node_ident(char *name)
{
	dt_ident_t *idp;
	dt_node_t *dnp;

	if (name == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	/*
	 * If the identifier is an inlined integer constant, then create an INT
	 * node that is a clone of the inline parse tree node and return that
	 * immediately, allowing this inline to be used in parsing contexts
	 * that require constant expressions (e.g. scalar array sizes).
	 */
	if ((idp = dt_idstack_lookup(&yypcb->pcb_globals, name)) != NULL &&
	    (idp->di_flags & DT_IDFLG_INLINE)) {
		dt_idnode_t *inp = idp->di_iarg;

		if (inp->din_root != NULL &&
		    inp->din_root->dn_kind == DT_NODE_INT) {
			free(name);

			dnp = dt_node_alloc(DT_NODE_INT);
			dnp->dn_op = DT_TOK_INT;
			dnp->dn_value = inp->din_root->dn_value;
			dt_node_type_propagate(inp->din_root, dnp);

			return (dnp);
		}
	}

	dnp = dt_node_alloc(DT_NODE_IDENT);
	dnp->dn_op = name[0] == '@' ? DT_TOK_AGG : DT_TOK_IDENT;
	dnp->dn_string = name;

	return (dnp);
}

/*
 * Create an empty node of type corresponding to the given declaration.
 * Explicit references to user types (C or D) are assigned the default
 * stability; references to other types are _dtrace_typattr (Private).
 */
dt_node_t *
dt_node_type(dt_decl_t *ddp)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dtrace_typeinfo_t dtt;
	dt_node_t *dnp;
	char *name = NULL;
	int err;

	/*
	 * If 'ddp' is NULL, we get a decl by popping the decl stack.  This
	 * form of dt_node_type() is used by parameter rules in dt_grammar.y.
	 */
	if (ddp == NULL)
		ddp = dt_decl_pop_param(&name);

	err = dt_decl_type(ddp, &dtt);
	dt_decl_free(ddp);

	if (err != 0) {
		free(name);
		longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
	}

	dnp = dt_node_alloc(DT_NODE_TYPE);
	dnp->dn_op = DT_TOK_IDENT;
	dnp->dn_string = name;

	dt_node_type_assign(dnp, dtt.dtt_ctfp, dtt.dtt_type, dtt.dtt_flags);

	if (dtt.dtt_ctfp == dtp->dt_cdefs->dm_ctfp ||
	    dtt.dtt_ctfp == dtp->dt_ddefs->dm_ctfp)
		dt_node_attr_assign(dnp, _dtrace_defattr);
	else
		dt_node_attr_assign(dnp, _dtrace_typattr);

	return (dnp);
}

/*
 * Create a type node corresponding to a varargs (...) parameter by just
 * assigning it type CTF_ERR.  The decl processing code will handle this.
 */
dt_node_t *
dt_node_vatype(void)
{
	dt_node_t *dnp = dt_node_alloc(DT_NODE_TYPE);

	dnp->dn_op = DT_TOK_IDENT;
	dnp->dn_ctfp = yypcb->pcb_hdl->dt_cdefs->dm_ctfp;
	dnp->dn_type = CTF_ERR;
	dnp->dn_attr = _dtrace_defattr;

	return (dnp);
}

/*
 * Instantiate a decl using the contents of the current declaration stack.  As
 * we do not currently permit decls to be initialized, this function currently
 * returns NULL and no parse node is created.  When this function is called,
 * the topmost scope's ds_ident pointer will be set to NULL (indicating no
 * init_declarator rule was matched) or will point to the identifier to use.
 */
dt_node_t *
dt_node_decl(void)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_scope_t *dsp = &yypcb->pcb_dstack;
	dt_dclass_t class = dsp->ds_class;
	dt_decl_t *ddp = dt_decl_top();

	dt_module_t *dmp;
	dtrace_typeinfo_t dtt;
	ctf_id_t type;

	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	if (dt_decl_type(ddp, &dtt) != 0)
		longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);

	/*
	 * If we have no declaration identifier, then this is either a spurious
	 * declaration of an intrinsic type (e.g. "extern int;") or declaration
	 * or redeclaration of a struct, union, or enum type or tag.
	 */
	if (dsp->ds_ident == NULL) {
		if (ddp->dd_kind != CTF_K_STRUCT &&
		    ddp->dd_kind != CTF_K_UNION && ddp->dd_kind != CTF_K_ENUM)
			xyerror(D_DECL_USELESS, "useless declaration\n");

		dt_dprintf("type %s added as id %ld\n", dt_type_name(
		    ddp->dd_ctfp, ddp->dd_type, n1, sizeof (n1)), ddp->dd_type);

		return (NULL);
	}

	if (strchr(dsp->ds_ident, '`') != NULL) {
		xyerror(D_DECL_SCOPE, "D scoping operator may not be used in "
		    "a declaration name (%s)\n", dsp->ds_ident);
	}

	/*
	 * If we are nested inside of a C include file, add the declaration to
	 * the C definition module; otherwise use the D definition module.
	 */
	if (yypcb->pcb_idepth != 0)
		dmp = dtp->dt_cdefs;
	else
		dmp = dtp->dt_ddefs;

	/*
	 * If we see a global or static declaration of a function prototype,
	 * treat this as equivalent to a D extern declaration.
	 */
	if (ctf_type_kind(dtt.dtt_ctfp, dtt.dtt_type) == CTF_K_FUNCTION &&
	    (class == DT_DC_DEFAULT || class == DT_DC_STATIC))
		class = DT_DC_EXTERN;

	switch (class) {
	case DT_DC_AUTO:
	case DT_DC_REGISTER:
	case DT_DC_STATIC:
		xyerror(D_DECL_BADCLASS, "specified storage class not "
		    "appropriate in D\n");
		/*NOTREACHED*/

	case DT_DC_EXTERN: {
		dtrace_typeinfo_t ott;
		dtrace_syminfo_t dts;
		GElf_Sym sym;

		int exists = dtrace_lookup_by_name(dtp,
		    dmp->dm_name, dsp->ds_ident, &sym, &dts) == 0;

		if (exists && (dtrace_symbol_type(dtp, &sym, &dts, &ott) != 0 ||
		    ctf_type_cmp(dtt.dtt_ctfp, dtt.dtt_type,
		    ott.dtt_ctfp, ott.dtt_type) != 0)) {
			xyerror(D_DECL_IDRED, "identifier redeclared: %s`%s\n"
			    "\t current: %s\n\tprevious: %s\n",
			    dmp->dm_name, dsp->ds_ident,
			    dt_type_name(dtt.dtt_ctfp, dtt.dtt_type,
				n1, sizeof (n1)),
			    dt_type_name(ott.dtt_ctfp, ott.dtt_type,
				n2, sizeof (n2)));
		} else if (!exists && dt_module_extern(dtp, dmp,
		    dsp->ds_ident, &dtt) == NULL) {
			xyerror(D_UNKNOWN,
			    "failed to extern %s: %s\n", dsp->ds_ident,
			    dtrace_errmsg(dtp, dtrace_errno(dtp)));
		} else {
			dt_dprintf("extern %s`%s type=<%s>\n",
			    dmp->dm_name, dsp->ds_ident,
			    dt_type_name(dtt.dtt_ctfp, dtt.dtt_type,
				n1, sizeof (n1)));
		}
		break;
	}

	case DT_DC_TYPEDEF:
		if (dt_idstack_lookup(&yypcb->pcb_globals, dsp->ds_ident)) {
			xyerror(D_DECL_IDRED, "global variable identifier "
			    "redeclared: %s\n", dsp->ds_ident);
		}

		if (ctf_lookup_by_name(dmp->dm_ctfp,
		    dsp->ds_ident) != CTF_ERR) {
			xyerror(D_DECL_IDRED,
			    "typedef redeclared: %s\n", dsp->ds_ident);
		}

		/*
		 * If the source type for the typedef is not defined in the
		 * target container or its parent, copy the type to the target
		 * container and reset dtt_ctfp and dtt_type to the copy.
		 */
		if (dtt.dtt_ctfp != dmp->dm_ctfp &&
		    dtt.dtt_ctfp != ctf_parent_file(dmp->dm_ctfp)) {

			dtt.dtt_type = ctf_add_type(dmp->dm_ctfp,
			    dtt.dtt_ctfp, dtt.dtt_type);
			dtt.dtt_ctfp = dmp->dm_ctfp;

			if (dtt.dtt_type == CTF_ERR ||
			    ctf_update(dtt.dtt_ctfp) == CTF_ERR) {
				xyerror(D_UNKNOWN, "failed to copy typedef %s "
				    "source type: %s\n", dsp->ds_ident,
				    ctf_errmsg(ctf_errno(dtt.dtt_ctfp)));
			}
		}

		type = ctf_add_typedef(dmp->dm_ctfp,
		    CTF_ADD_ROOT, dsp->ds_ident, dtt.dtt_type);

		if (type == CTF_ERR || ctf_update(dmp->dm_ctfp) == CTF_ERR) {
			xyerror(D_UNKNOWN, "failed to typedef %s: %s\n",
			    dsp->ds_ident, ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
		}

		dt_dprintf("typedef %s added as id %ld\n", dsp->ds_ident, type);
		break;

	default: {
		ctf_encoding_t cte;
		dt_idhash_t *dhp;
		dt_ident_t *idp;
		dt_node_t idn;
		int assc, idkind;
		uint_t id, kind;
		ushort_t idflags;

		switch (class) {
		case DT_DC_THIS:
			dhp = yypcb->pcb_locals;
			idflags = DT_IDFLG_LOCAL;
			idp = dt_idhash_lookup(dhp, dsp->ds_ident);
			break;
		case DT_DC_SELF:
			dhp = dtp->dt_tls;
			idflags = DT_IDFLG_TLS;
			idp = dt_idhash_lookup(dhp, dsp->ds_ident);
			break;
		default:
			dhp = dtp->dt_globals;
			idflags = 0;
			idp = dt_idstack_lookup(
			    &yypcb->pcb_globals, dsp->ds_ident);
			break;
		}

		if (ddp->dd_kind == CTF_K_ARRAY && ddp->dd_node == NULL) {
			xyerror(D_DECL_ARRNULL,
			    "array declaration requires array dimension or "
			    "tuple signature: %s\n", dsp->ds_ident);
		}

		if (idp != NULL && idp->di_gen == 0) {
			xyerror(D_DECL_IDRED, "built-in identifier "
			    "redeclared: %s\n", idp->di_name);
		}

		if (dtrace_lookup_by_type(dtp, DTRACE_OBJ_CDEFS,
		    dsp->ds_ident, NULL) == 0 ||
		    dtrace_lookup_by_type(dtp, DTRACE_OBJ_DDEFS,
		    dsp->ds_ident, NULL) == 0) {
			xyerror(D_DECL_IDRED, "typedef identifier "
			    "redeclared: %s\n", dsp->ds_ident);
		}

		/*
		 * Cache some attributes of the decl to make the rest of this
		 * code simpler: if the decl is an array which is subscripted
		 * by a type rather than an integer, then it's an associative
		 * array (assc).  We then expect to match either DT_IDENT_ARRAY
		 * for associative arrays or DT_IDENT_SCALAR for anything else.
		 */
		assc = ddp->dd_kind == CTF_K_ARRAY &&
		    ddp->dd_node->dn_kind == DT_NODE_TYPE;

		idkind = assc ? DT_IDENT_ARRAY : DT_IDENT_SCALAR;

		/*
		 * Create a fake dt_node_t on the stack so we can determine the
		 * type of any matching identifier by assigning to this node.
		 * If the pre-existing ident has its di_type set, propagate
		 * the type by hand so as not to trigger a prototype check for
		 * arrays (yet); otherwise we use dt_ident_cook() on the ident
		 * to ensure it is fully initialized before looking at it.
		 */
		bzero(&idn, sizeof (dt_node_t));

		if (idp != NULL && idp->di_type != CTF_ERR)
			dt_node_type_assign(&idn, idp->di_ctfp, idp->di_type,
			    B_FALSE);
		else if (idp != NULL)
			(void) dt_ident_cook(&idn, idp, NULL);

		if (assc) {
			if (class == DT_DC_THIS) {
				xyerror(D_DECL_LOCASSC, "associative arrays "
				    "may not be declared as local variables:"
				    " %s\n", dsp->ds_ident);
			}

			if (dt_decl_type(ddp->dd_next, &dtt) != 0)
				longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
		}

		if (idp != NULL && (idp->di_kind != idkind ||
		    ctf_type_cmp(dtt.dtt_ctfp, dtt.dtt_type,
		    idn.dn_ctfp, idn.dn_type) != 0)) {
			xyerror(D_DECL_IDRED, "identifier redeclared: %s\n"
			    "\t current: %s %s\n\tprevious: %s %s\n",
			    dsp->ds_ident, dt_idkind_name(idkind),
			    dt_type_name(dtt.dtt_ctfp,
			    dtt.dtt_type, n1, sizeof (n1)),
			    dt_idkind_name(idp->di_kind),
			    dt_node_type_name(&idn, n2, sizeof (n2)));

		} else if (idp != NULL && assc) {
			const dt_idsig_t *isp = idp->di_data;
			dt_node_t *dnp = ddp->dd_node;
			int argc = 0;

			for (; dnp != NULL; dnp = dnp->dn_list, argc++) {
				const dt_node_t *pnp = &isp->dis_args[argc];

				if (argc >= isp->dis_argc)
					continue; /* tuple length mismatch */

				if (ctf_type_cmp(dnp->dn_ctfp, dnp->dn_type,
				    pnp->dn_ctfp, pnp->dn_type) == 0)
					continue;

				xyerror(D_DECL_IDRED,
				    "identifier redeclared: %s\n"
				    "\t current: %s, key #%d of type %s\n"
				    "\tprevious: %s, key #%d of type %s\n",
				    dsp->ds_ident,
				    dt_idkind_name(idkind), argc + 1,
				    dt_node_type_name(dnp, n1, sizeof (n1)),
				    dt_idkind_name(idp->di_kind), argc + 1,
				    dt_node_type_name(pnp, n2, sizeof (n2)));
			}

			if (isp->dis_argc != argc) {
				xyerror(D_DECL_IDRED,
				    "identifier redeclared: %s\n"
				    "\t current: %s of %s, tuple length %d\n"
				    "\tprevious: %s of %s, tuple length %d\n",
				    dsp->ds_ident, dt_idkind_name(idkind),
				    dt_type_name(dtt.dtt_ctfp, dtt.dtt_type,
				    n1, sizeof (n1)), argc,
				    dt_idkind_name(idp->di_kind),
				    dt_node_type_name(&idn, n2, sizeof (n2)),
				    isp->dis_argc);
			}

		} else if (idp == NULL) {
			type = ctf_type_resolve(dtt.dtt_ctfp, dtt.dtt_type);
			kind = ctf_type_kind(dtt.dtt_ctfp, type);

			switch (kind) {
			case CTF_K_INTEGER:
				if (ctf_type_encoding(dtt.dtt_ctfp, type,
				    &cte) == 0 && IS_VOID(cte)) {
					xyerror(D_DECL_VOIDOBJ, "cannot have "
					    "void object: %s\n", dsp->ds_ident);
				}
				break;
			case CTF_K_STRUCT:
			case CTF_K_UNION:
				if (ctf_type_size(dtt.dtt_ctfp, type) != 0)
					break; /* proceed to declaring */
				/*FALLTHRU*/
			case CTF_K_FORWARD:
				xyerror(D_DECL_INCOMPLETE,
				    "incomplete struct/union/enum %s: %s\n",
				    dt_type_name(dtt.dtt_ctfp, dtt.dtt_type,
				    n1, sizeof (n1)), dsp->ds_ident);
				/*NOTREACHED*/
			}

			if (dt_idhash_nextid(dhp, &id) == -1) {
				xyerror(D_ID_OFLOW, "cannot create %s: limit "
				    "on number of %s variables exceeded\n",
				    dsp->ds_ident, dt_idhash_name(dhp));
			}

			dt_dprintf("declare %s %s variable %s, id=%u\n",
			    dt_idhash_name(dhp), dt_idkind_name(idkind),
			    dsp->ds_ident, id);

			idp = dt_idhash_insert(dhp, dsp->ds_ident, idkind,
			    idflags | DT_IDFLG_WRITE | DT_IDFLG_DECL, id,
			    _dtrace_defattr, 0, assc ? &dt_idops_assc :
			    &dt_idops_thaw, NULL, dtp->dt_gen);

			if (idp == NULL)
				longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

			dt_ident_type_assign(idp, dtt.dtt_ctfp, dtt.dtt_type);

			/*
			 * If we are declaring an associative array, use our
			 * fake parse node to cook the new assoc identifier.
			 * This will force the ident code to instantiate the
			 * array type signature corresponding to the list of
			 * types pointed to by ddp->dd_node.  We also reset
			 * the identifier's attributes based upon the result.
			 */
			if (assc) {
				idp->di_attr =
				    dt_ident_cook(&idn, idp, &ddp->dd_node);
			}
		}
	}

	} /* end of switch */

	free(dsp->ds_ident);
	dsp->ds_ident = NULL;

	return (NULL);
}

dt_node_t *
dt_node_func(dt_node_t *dnp, dt_node_t *args)
{
	dt_ident_t *idp;

	if (dnp->dn_kind != DT_NODE_IDENT) {
		xyerror(D_FUNC_IDENT,
		    "function designator is not of function type\n");
	}

	idp = dt_idstack_lookup(&yypcb->pcb_globals, dnp->dn_string);

	if (idp == NULL) {
		xyerror(D_FUNC_UNDEF,
		    "undefined function name: %s\n", dnp->dn_string);
	}

	if (idp->di_kind != DT_IDENT_FUNC &&
	    idp->di_kind != DT_IDENT_AGGFUNC &&
	    idp->di_kind != DT_IDENT_ACTFUNC) {
		xyerror(D_FUNC_IDKIND, "%s '%s' may not be referenced as a "
		    "function\n", dt_idkind_name(idp->di_kind), idp->di_name);
	}

	free(dnp->dn_string);
	dnp->dn_string = NULL;

	dnp->dn_kind = DT_NODE_FUNC;
	dnp->dn_flags &= ~DT_NF_COOKED;
	dnp->dn_ident = idp;
	dnp->dn_args = args;
	dnp->dn_list = NULL;

	return (dnp);
}

/*
 * The offsetof() function is special because it takes a type name as an
 * argument.  It does not actually construct its own node; after looking up the
 * structure or union offset, we just return an integer node with the offset.
 */
dt_node_t *
dt_node_offsetof(dt_decl_t *ddp, char *s)
{
	dtrace_typeinfo_t dtt;
	dt_node_t dn;
	char *name;
	int err;

	ctf_membinfo_t ctm;
	ctf_id_t type;
	uint_t kind;

	name = alloca(strlen(s) + 1);
	(void) strcpy(name, s);
	free(s);

	err = dt_decl_type(ddp, &dtt);
	dt_decl_free(ddp);

	if (err != 0)
		longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);

	type = ctf_type_resolve(dtt.dtt_ctfp, dtt.dtt_type);
	kind = ctf_type_kind(dtt.dtt_ctfp, type);

	if (kind != CTF_K_STRUCT && kind != CTF_K_UNION) {
		xyerror(D_OFFSETOF_TYPE,
		    "offsetof operand must be a struct or union type\n");
	}

	if (ctf_member_info(dtt.dtt_ctfp, type, name, &ctm) == CTF_ERR) {
		xyerror(D_UNKNOWN, "failed to determine offset of %s: %s\n",
		    name, ctf_errmsg(ctf_errno(dtt.dtt_ctfp)));
	}

	bzero(&dn, sizeof (dn));
	dt_node_type_assign(&dn, dtt.dtt_ctfp, ctm.ctm_type, B_FALSE);

	if (dn.dn_flags & DT_NF_BITFIELD) {
		xyerror(D_OFFSETOF_BITFIELD,
		    "cannot take offset of a bit-field: %s\n", name);
	}

	return (dt_node_int(ctm.ctm_offset / NBBY));
}

dt_node_t *
dt_node_op1(int op, dt_node_t *cp)
{
	dt_node_t *dnp;

	if (cp->dn_kind == DT_NODE_INT) {
		switch (op) {
		case DT_TOK_INEG:
			/*
			 * If we're negating an unsigned integer, zero out any
			 * extra top bits to truncate the value to the size of
			 * the effective type determined by dt_node_int().
			 */
			cp->dn_value = -cp->dn_value;
			if (!(cp->dn_flags & DT_NF_SIGNED)) {
				cp->dn_value &= ~0ULL >>
				    (64 - dt_node_type_size(cp) * NBBY);
			}
			/*FALLTHRU*/
		case DT_TOK_IPOS:
			return (cp);
		case DT_TOK_BNEG:
			cp->dn_value = ~cp->dn_value;
			return (cp);
		case DT_TOK_LNEG:
			cp->dn_value = !cp->dn_value;
			return (cp);
		}
	}

	/*
	 * If sizeof is applied to a type_name or string constant, we can
	 * transform 'cp' into an integer constant in the node construction
	 * pass so that it can then be used for arithmetic in this pass.
	 */
	if (op == DT_TOK_SIZEOF &&
	    (cp->dn_kind == DT_NODE_STRING || cp->dn_kind == DT_NODE_TYPE)) {
		dtrace_hdl_t *dtp = yypcb->pcb_hdl;
		size_t size = dt_node_type_size(cp);

		if (size == 0) {
			xyerror(D_SIZEOF_TYPE, "cannot apply sizeof to an "
			    "operand of unknown size\n");
		}

		dt_node_type_assign(cp, dtp->dt_ddefs->dm_ctfp,
		    ctf_lookup_by_name(dtp->dt_ddefs->dm_ctfp, "size_t"),
		    B_FALSE);

		cp->dn_kind = DT_NODE_INT;
		cp->dn_op = DT_TOK_INT;
		cp->dn_value = size;

		return (cp);
	}

	dnp = dt_node_alloc(DT_NODE_OP1);
	assert(op <= USHRT_MAX);
	dnp->dn_op = (ushort_t)op;
	dnp->dn_child = cp;

	return (dnp);
}

/*
 * If an integer constant is being cast to another integer type, we can
 * perform the cast as part of integer constant folding in this pass. We must
 * take action when the integer is being cast to a smaller type or if it is
 * changing signed-ness. If so, we first shift rp's bits bits high (losing
 * excess bits if narrowing) and then shift them down with either a logical
 * shift (unsigned) or arithmetic shift (signed).
 */
static void
dt_cast(dt_node_t *lp, dt_node_t *rp)
{
	size_t srcsize = dt_node_type_size(rp);
	size_t dstsize = dt_node_type_size(lp);

	if (dstsize < srcsize) {
		int n = (sizeof (uint64_t) - dstsize) * NBBY;
		rp->dn_value <<= n;
		rp->dn_value >>= n;
	} else if (dstsize > srcsize) {
		int n = (sizeof (uint64_t) - srcsize) * NBBY;
		int s = (dstsize - srcsize) * NBBY;

		rp->dn_value <<= n;
		if (rp->dn_flags & DT_NF_SIGNED) {
			rp->dn_value = (intmax_t)rp->dn_value >> s;
			rp->dn_value >>= n - s;
		} else {
			rp->dn_value >>= n;
		}
	}
}

dt_node_t *
dt_node_op2(int op, dt_node_t *lp, dt_node_t *rp)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_node_t *dnp;

	/*
	 * First we check for operations that are illegal -- namely those that
	 * might result in integer division by zero, and abort if one is found.
	 */
	if (rp->dn_kind == DT_NODE_INT && rp->dn_value == 0 &&
	    (op == DT_TOK_MOD || op == DT_TOK_DIV ||
	    op == DT_TOK_MOD_EQ || op == DT_TOK_DIV_EQ))
		xyerror(D_DIV_ZERO, "expression contains division by zero\n");

	/*
	 * If both children are immediate values, we can just perform inline
	 * calculation and return a new immediate node with the result.
	 */
	if (lp->dn_kind == DT_NODE_INT && rp->dn_kind == DT_NODE_INT) {
		uintmax_t l = lp->dn_value;
		uintmax_t r = rp->dn_value;

		dnp = dt_node_int(0); /* allocate new integer node for result */

		switch (op) {
		case DT_TOK_LOR:
			dnp->dn_value = l || r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_LXOR:
			dnp->dn_value = (l != 0) ^ (r != 0);
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_LAND:
			dnp->dn_value = l && r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_BOR:
			dnp->dn_value = l | r;
			dt_node_promote(lp, rp, dnp);
			break;
		case DT_TOK_XOR:
			dnp->dn_value = l ^ r;
			dt_node_promote(lp, rp, dnp);
			break;
		case DT_TOK_BAND:
			dnp->dn_value = l & r;
			dt_node_promote(lp, rp, dnp);
			break;
		case DT_TOK_EQU:
			dnp->dn_value = l == r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_NEQ:
			dnp->dn_value = l != r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_LT:
			dt_node_promote(lp, rp, dnp);
			if (dnp->dn_flags & DT_NF_SIGNED)
				dnp->dn_value = (intmax_t)l < (intmax_t)r;
			else
				dnp->dn_value = l < r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_LE:
			dt_node_promote(lp, rp, dnp);
			if (dnp->dn_flags & DT_NF_SIGNED)
				dnp->dn_value = (intmax_t)l <= (intmax_t)r;
			else
				dnp->dn_value = l <= r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_GT:
			dt_node_promote(lp, rp, dnp);
			if (dnp->dn_flags & DT_NF_SIGNED)
				dnp->dn_value = (intmax_t)l > (intmax_t)r;
			else
				dnp->dn_value = l > r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_GE:
			dt_node_promote(lp, rp, dnp);
			if (dnp->dn_flags & DT_NF_SIGNED)
				dnp->dn_value = (intmax_t)l >= (intmax_t)r;
			else
				dnp->dn_value = l >= r;
			dt_node_type_assign(dnp,
			    DT_INT_CTFP(dtp), DT_INT_TYPE(dtp), B_FALSE);
			break;
		case DT_TOK_LSH:
			dnp->dn_value = l << r;
			dt_node_type_propagate(lp, dnp);
			dt_node_attr_assign(rp,
			    dt_attr_min(lp->dn_attr, rp->dn_attr));
			break;
		case DT_TOK_RSH:
			dnp->dn_value = l >> r;
			dt_node_type_propagate(lp, dnp);
			dt_node_attr_assign(rp,
			    dt_attr_min(lp->dn_attr, rp->dn_attr));
			break;
		case DT_TOK_ADD:
			dnp->dn_value = l + r;
			dt_node_promote(lp, rp, dnp);
			break;
		case DT_TOK_SUB:
			dnp->dn_value = l - r;
			dt_node_promote(lp, rp, dnp);
			break;
		case DT_TOK_MUL:
			dnp->dn_value = l * r;
			dt_node_promote(lp, rp, dnp);
			break;
		case DT_TOK_DIV:
			dt_node_promote(lp, rp, dnp);
			if (dnp->dn_flags & DT_NF_SIGNED)
				dnp->dn_value = (intmax_t)l / (intmax_t)r;
			else
				dnp->dn_value = l / r;
			break;
		case DT_TOK_MOD:
			dt_node_promote(lp, rp, dnp);
			if (dnp->dn_flags & DT_NF_SIGNED)
				dnp->dn_value = (intmax_t)l % (intmax_t)r;
			else
				dnp->dn_value = l % r;
			break;
		default:
			dt_node_free(dnp);
			dnp = NULL;
		}

		if (dnp != NULL) {
			dt_node_free(lp);
			dt_node_free(rp);
			return (dnp);
		}
	}

	if (op == DT_TOK_LPAR && rp->dn_kind == DT_NODE_INT &&
	    dt_node_is_integer(lp)) {
		dt_cast(lp, rp);
		dt_node_type_propagate(lp, rp);
		dt_node_attr_assign(rp, dt_attr_min(lp->dn_attr, rp->dn_attr));
		dt_node_free(lp);

		return (rp);
	}

	/*
	 * If no immediate optimizations are available, create an new OP2 node
	 * and glue the left and right children into place and return.
	 */
	dnp = dt_node_alloc(DT_NODE_OP2);
	assert(op <= USHRT_MAX);
	dnp->dn_op = (ushort_t)op;
	dnp->dn_left = lp;
	dnp->dn_right = rp;

	return (dnp);
}

dt_node_t *
dt_node_op3(dt_node_t *expr, dt_node_t *lp, dt_node_t *rp)
{
	dt_node_t *dnp;

	if (expr->dn_kind == DT_NODE_INT)
		return (expr->dn_value != 0 ? lp : rp);

	dnp = dt_node_alloc(DT_NODE_OP3);
	dnp->dn_op = DT_TOK_QUESTION;
	dnp->dn_expr = expr;
	dnp->dn_left = lp;
	dnp->dn_right = rp;

	return (dnp);
}

dt_node_t *
dt_node_statement(dt_node_t *expr)
{
	dt_node_t *dnp;

	if (expr->dn_kind == DT_NODE_AGG)
		return (expr);

	if (expr->dn_kind == DT_NODE_FUNC &&
	    expr->dn_ident->di_kind == DT_IDENT_ACTFUNC)
		dnp = dt_node_alloc(DT_NODE_DFUNC);
	else
		dnp = dt_node_alloc(DT_NODE_DEXPR);

	dnp->dn_expr = expr;
	return (dnp);
}

dt_node_t *
dt_node_pdesc_by_name(char *spec)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_node_t *dnp;

	if (spec == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	dnp = dt_node_alloc(DT_NODE_PDESC);
	dnp->dn_spec = spec;
	dnp->dn_desc = malloc(sizeof (dtrace_probedesc_t));

	if (dnp->dn_desc == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	if (dtrace_xstr2desc(dtp, yypcb->pcb_pspec, dnp->dn_spec,
	    yypcb->pcb_sargc, yypcb->pcb_sargv, dnp->dn_desc) != 0) {
		xyerror(D_PDESC_INVAL, "invalid probe description \"%s\": %s\n",
		    dnp->dn_spec, dtrace_errmsg(dtp, dtrace_errno(dtp)));
	}

	free(dnp->dn_spec);
	dnp->dn_spec = NULL;

	return (dnp);
}

dt_node_t *
dt_node_pdesc_by_id(uintmax_t id)
{
	static const char *const names[] = {
		"providers", "modules", "functions"
	};

	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_node_t *dnp = dt_node_alloc(DT_NODE_PDESC);

	if ((dnp->dn_desc = malloc(sizeof (dtrace_probedesc_t))) == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	if (id > UINT_MAX) {
		xyerror(D_PDESC_INVAL, "identifier %llu exceeds maximum "
		    "probe id\n", (u_longlong_t)id);
	}

	if (yypcb->pcb_pspec != DTRACE_PROBESPEC_NAME) {
		xyerror(D_PDESC_INVAL, "probe identifier %llu not permitted "
		    "when specifying %s\n", (u_longlong_t)id,
		    names[yypcb->pcb_pspec]);
	}

	if (dtrace_id2desc(dtp, (dtrace_id_t)id, dnp->dn_desc) != 0) {
		xyerror(D_PDESC_INVAL, "invalid probe identifier %llu: %s\n",
		    (u_longlong_t)id, dtrace_errmsg(dtp, dtrace_errno(dtp)));
	}

	return (dnp);
}

dt_node_t *
dt_node_clause(dt_node_t *pdescs, dt_node_t *pred, dt_node_t *acts)
{
	dt_node_t *dnp = dt_node_alloc(DT_NODE_CLAUSE);

	dnp->dn_pdescs = pdescs;
	dnp->dn_pred = pred;
	dnp->dn_acts = acts;

	yybegin(YYS_CLAUSE);
	return (dnp);
}

dt_node_t *
dt_node_inline(dt_node_t *expr)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_scope_t *dsp = &yypcb->pcb_dstack;
	dt_decl_t *ddp = dt_decl_top();

	char n[DT_TYPE_NAMELEN];
	dtrace_typeinfo_t dtt;

	dt_ident_t *idp, *rdp;
	dt_idnode_t *inp;
	dt_node_t *dnp;

	if (dt_decl_type(ddp, &dtt) != 0)
		longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);

	if (dsp->ds_class != DT_DC_DEFAULT) {
		xyerror(D_DECL_BADCLASS, "specified storage class not "
		    "appropriate for inline declaration\n");
	}

	if (dsp->ds_ident == NULL)
		xyerror(D_DECL_USELESS, "inline declaration requires a name\n");

	if ((idp = dt_idstack_lookup(
	    &yypcb->pcb_globals, dsp->ds_ident)) != NULL) {
		xyerror(D_DECL_IDRED, "identifier redefined: %s\n\t current: "
		    "inline definition\n\tprevious: %s %s\n",
		    idp->di_name, dt_idkind_name(idp->di_kind),
		    (idp->di_flags & DT_IDFLG_INLINE) ? "inline" : "");
	}

	/*
	 * If we are declaring an inlined array, verify that we have a tuple
	 * signature, and then recompute 'dtt' as the array's value type.
	 */
	if (ddp->dd_kind == CTF_K_ARRAY) {
		if (ddp->dd_node == NULL) {
			xyerror(D_DECL_ARRNULL, "inline declaration requires "
			    "array tuple signature: %s\n", dsp->ds_ident);
		}

		if (ddp->dd_node->dn_kind != DT_NODE_TYPE) {
			xyerror(D_DECL_ARRNULL, "inline declaration cannot be "
			    "of scalar array type: %s\n", dsp->ds_ident);
		}

		if (dt_decl_type(ddp->dd_next, &dtt) != 0)
			longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
	}

	/*
	 * If the inline identifier is not defined, then create it with the
	 * orphan flag set.  We do not insert the identifier into dt_globals
	 * until we have successfully cooked the right-hand expression, below.
	 */
	dnp = dt_node_alloc(DT_NODE_INLINE);
	dt_node_type_assign(dnp, dtt.dtt_ctfp, dtt.dtt_type, B_FALSE);
	dt_node_attr_assign(dnp, _dtrace_defattr);

	if (dt_node_is_void(dnp)) {
		xyerror(D_DECL_VOIDOBJ,
		    "cannot declare void inline: %s\n", dsp->ds_ident);
	}

	if (ctf_type_kind(dnp->dn_ctfp, ctf_type_resolve(
	    dnp->dn_ctfp, dnp->dn_type)) == CTF_K_FORWARD) {
		xyerror(D_DECL_INCOMPLETE,
		    "incomplete struct/union/enum %s: %s\n",
		    dt_node_type_name(dnp, n, sizeof (n)), dsp->ds_ident);
	}

	if ((inp = malloc(sizeof (dt_idnode_t))) == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	bzero(inp, sizeof (dt_idnode_t));

	idp = dnp->dn_ident = dt_ident_create(dsp->ds_ident,
	    ddp->dd_kind == CTF_K_ARRAY ? DT_IDENT_ARRAY : DT_IDENT_SCALAR,
	    DT_IDFLG_INLINE | DT_IDFLG_REF | DT_IDFLG_DECL | DT_IDFLG_ORPHAN, 0,
	    _dtrace_defattr, 0, &dt_idops_inline, inp, dtp->dt_gen);

	if (idp == NULL) {
		free(inp);
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
	}

	/*
	 * If we're inlining an associative array, create a private identifier
	 * hash containing the named parameters and store it in inp->din_hash.
	 * We then push this hash on to the top of the pcb_globals stack.
	 */
	if (ddp->dd_kind == CTF_K_ARRAY) {
		dt_idnode_t *pinp;
		dt_ident_t *pidp;
		dt_node_t *pnp;
		uint_t i = 0;

		for (pnp = ddp->dd_node; pnp != NULL; pnp = pnp->dn_list)
			i++; /* count up parameters for din_argv[] */

		inp->din_hash = dt_idhash_create("inline args", NULL, 0, 0);
		inp->din_argv = calloc(i, sizeof (dt_ident_t *));

		if (inp->din_hash == NULL || inp->din_argv == NULL)
			longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

		/*
		 * Create an identifier for each parameter as a scalar inline,
		 * and store it in din_hash and in position in din_argv[].  The
		 * parameter identifiers also use dt_idops_inline, but we leave
		 * the dt_idnode_t argument 'pinp' zeroed.  This will be filled
		 * in by the code generation pass with references to the args.
		 */
		for (i = 0, pnp = ddp->dd_node;
		    pnp != NULL; pnp = pnp->dn_list, i++) {

			if (pnp->dn_string == NULL)
				continue; /* ignore anonymous parameters */

			if ((pinp = malloc(sizeof (dt_idnode_t))) == NULL)
				longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

			pidp = dt_idhash_insert(inp->din_hash, pnp->dn_string,
			    DT_IDENT_SCALAR, DT_IDFLG_DECL | DT_IDFLG_INLINE, 0,
			    _dtrace_defattr, 0, &dt_idops_inline,
			    pinp, dtp->dt_gen);

			if (pidp == NULL) {
				free(pinp);
				longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
			}

			inp->din_argv[i] = pidp;
			bzero(pinp, sizeof (dt_idnode_t));
			dt_ident_type_assign(pidp, pnp->dn_ctfp, pnp->dn_type);
		}

		dt_idstack_push(&yypcb->pcb_globals, inp->din_hash);
	}

	/*
	 * Unlike most constructors, we need to explicitly cook the right-hand
	 * side of the inline definition immediately to prevent recursion.  If
	 * the right-hand side uses the inline itself, the cook will fail.
	 */
	expr = dt_node_cook(expr, DT_IDFLG_REF);

	if (ddp->dd_kind == CTF_K_ARRAY)
		dt_idstack_pop(&yypcb->pcb_globals, inp->din_hash);

	/*
	 * Set the type, attributes, and flags for the inline.  If the right-
	 * hand expression has an identifier, propagate its flags.  Then cook
	 * the identifier to fully initialize it: if we're declaring an inline
	 * associative array this will construct a type signature from 'ddp'.
	 */
	if (dt_node_is_dynamic(expr))
		rdp = dt_ident_resolve(expr->dn_ident);
	else if (expr->dn_kind == DT_NODE_VAR || expr->dn_kind == DT_NODE_SYM)
		rdp = expr->dn_ident;
	else
		rdp = NULL;

	if (rdp != NULL) {
		idp->di_flags |= (rdp->di_flags &
		    (DT_IDFLG_WRITE | DT_IDFLG_USER | DT_IDFLG_PRIM));
	}

	idp->di_attr = dt_attr_min(_dtrace_defattr, expr->dn_attr);
	dt_ident_type_assign(idp, dtt.dtt_ctfp, dtt.dtt_type);
	(void) dt_ident_cook(dnp, idp, &ddp->dd_node);

	/*
	 * Store the parse tree nodes for 'expr' inside of idp->di_data ('inp')
	 * so that they will be preserved with this identifier.  Then pop the
	 * inline declaration from the declaration stack and restore the lexer.
	 */
	inp->din_list = yypcb->pcb_list;
	inp->din_root = expr;

	dt_decl_free(dt_decl_pop());
	yybegin(YYS_CLAUSE);

	/*
	 * Finally, insert the inline identifier into dt_globals to make it
	 * visible, and then cook 'dnp' to check its type against 'expr'.
	 */
	dt_idhash_xinsert(dtp->dt_globals, idp);
	return (dt_node_cook(dnp, DT_IDFLG_REF));
}

dt_node_t *
dt_node_member(dt_decl_t *ddp, char *name, dt_node_t *expr)
{
	dtrace_typeinfo_t dtt;
	dt_node_t *dnp;
	int err;

	if (ddp != NULL) {
		err = dt_decl_type(ddp, &dtt);
		dt_decl_free(ddp);

		if (err != 0)
			longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
	}

	dnp = dt_node_alloc(DT_NODE_MEMBER);
	dnp->dn_membname = name;
	dnp->dn_membexpr = expr;

	if (ddp != NULL)
		dt_node_type_assign(dnp, dtt.dtt_ctfp, dtt.dtt_type,
		    dtt.dtt_flags);

	return (dnp);
}

dt_node_t *
dt_node_xlator(dt_decl_t *ddp, dt_decl_t *sdp, char *name, dt_node_t *members)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dtrace_typeinfo_t src, dst;
	dt_node_t sn, dn;
	dt_xlator_t *dxp;
	dt_node_t *dnp;
	int edst, esrc;
	uint_t kind;

	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	edst = dt_decl_type(ddp, &dst);
	dt_decl_free(ddp);

	esrc = dt_decl_type(sdp, &src);
	dt_decl_free(sdp);

	if (edst != 0 || esrc != 0) {
		free(name);
		longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
	}

	bzero(&sn, sizeof (sn));
	dt_node_type_assign(&sn, src.dtt_ctfp, src.dtt_type, B_FALSE);

	bzero(&dn, sizeof (dn));
	dt_node_type_assign(&dn, dst.dtt_ctfp, dst.dtt_type, B_FALSE);

	if (dt_xlator_lookup(dtp, &sn, &dn, DT_XLATE_EXACT) != NULL) {
		xyerror(D_XLATE_REDECL,
		    "translator from %s to %s has already been declared\n",
		    dt_node_type_name(&sn, n1, sizeof (n1)),
		    dt_node_type_name(&dn, n2, sizeof (n2)));
	}

	kind = ctf_type_kind(dst.dtt_ctfp,
	    ctf_type_resolve(dst.dtt_ctfp, dst.dtt_type));

	if (kind == CTF_K_FORWARD) {
		xyerror(D_XLATE_SOU, "incomplete struct/union/enum %s\n",
		    dt_type_name(dst.dtt_ctfp, dst.dtt_type, n1, sizeof (n1)));
	}

	if (kind != CTF_K_STRUCT && kind != CTF_K_UNION) {
		xyerror(D_XLATE_SOU,
		    "translator output type must be a struct or union\n");
	}

	dxp = dt_xlator_create(dtp, &src, &dst, name, members, yypcb->pcb_list);
	yybegin(YYS_CLAUSE);
	free(name);

	if (dxp == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	dnp = dt_node_alloc(DT_NODE_XLATOR);
	dnp->dn_xlator = dxp;
	dnp->dn_members = members;

	return (dt_node_cook(dnp, DT_IDFLG_REF));
}

dt_node_t *
dt_node_probe(char *s, int protoc, dt_node_t *nargs, dt_node_t *xargs)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	int nargc, xargc;
	dt_node_t *dnp;

	size_t len = strlen(s) + 3; /* +3 for :: and \0 */
	char *name = alloca(len);

	(void) snprintf(name, len, "::%s", s);
	(void) strhyphenate(name);
	free(s);

	if (strchr(name, '`') != NULL) {
		xyerror(D_PROV_BADNAME, "probe name may not "
		    "contain scoping operator: %s\n", name);
	}

	if (strlen(name) - 2 >= DTRACE_NAMELEN) {
		xyerror(D_PROV_BADNAME, "probe name may not exceed %d "
		    "characters: %s\n", DTRACE_NAMELEN - 1, name);
	}

	dnp = dt_node_alloc(DT_NODE_PROBE);

	dnp->dn_ident = dt_ident_create(name, DT_IDENT_PROBE,
	    DT_IDFLG_ORPHAN, DTRACE_IDNONE, _dtrace_defattr, 0,
	    &dt_idops_probe, NULL, dtp->dt_gen);

	nargc = dt_decl_prototype(nargs, nargs,
	    "probe input", DT_DP_VOID | DT_DP_ANON);

	xargc = dt_decl_prototype(xargs, nargs,
	    "probe output", DT_DP_VOID);

	if (nargc > UINT8_MAX) {
		xyerror(D_PROV_PRARGLEN, "probe %s input prototype exceeds %u "
		    "parameters: %d params used\n", name, UINT8_MAX, nargc);
	}

	if (xargc > UINT8_MAX) {
		xyerror(D_PROV_PRARGLEN, "probe %s output prototype exceeds %u "
		    "parameters: %d params used\n", name, UINT8_MAX, xargc);
	}

	if (dnp->dn_ident == NULL || dt_probe_create(dtp,
	    dnp->dn_ident, protoc, nargs, nargc, xargs, xargc) == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

	return (dnp);
}

dt_node_t *
dt_node_provider(char *name, dt_node_t *probes)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_node_t *dnp = dt_node_alloc(DT_NODE_PROVIDER);
	dt_node_t *lnp;
	size_t len;

	dnp->dn_provname = name;
	dnp->dn_probes = probes;

	if (strchr(name, '`') != NULL) {
		dnerror(dnp, D_PROV_BADNAME, "provider name may not "
		    "contain scoping operator: %s\n", name);
	}

	if ((len = strlen(name)) >= DTRACE_PROVNAMELEN) {
		dnerror(dnp, D_PROV_BADNAME, "provider name may not exceed %d "
		    "characters: %s\n", DTRACE_PROVNAMELEN - 1, name);
	}

	if (isdigit(name[len - 1])) {
		dnerror(dnp, D_PROV_BADNAME, "provider name may not "
		    "end with a digit: %s\n", name);
	}

	/*
	 * Check to see if the provider is already defined or visible through
	 * dtrace(7D).  If so, set dn_provred to treat it as a re-declaration.
	 * If not, create a new provider and set its interface-only flag.  This
	 * flag may be cleared later by calls made to dt_probe_declare().
	 */
	if ((dnp->dn_provider = dt_provider_lookup(dtp, name)) != NULL)
		dnp->dn_provred = B_TRUE;
	else if ((dnp->dn_provider = dt_provider_create(dtp, name)) == NULL)
		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
	else
		dnp->dn_provider->pv_flags |= DT_PROVIDER_INTF;

	/*
	 * Store all parse nodes created since we consumed the DT_KEY_PROVIDER
	 * token with the provider and then restore our lexing state to CLAUSE.
	 * Note that if dnp->dn_provred is true, we may end up storing dups of
	 * a provider's interface and implementation: we eat this space because
	 * the implementation will likely need to redeclare probe members, and
	 * therefore may result in those member nodes becoming persistent.
	 */
	for (lnp = yypcb->pcb_list; lnp->dn_link != NULL; lnp = lnp->dn_link)
		continue; /* skip to end of allocation list */

	lnp->dn_link = dnp->dn_provider->pv_nodes;
	dnp->dn_provider->pv_nodes = yypcb->pcb_list;

	yybegin(YYS_CLAUSE);
	return (dnp);
}

dt_node_t *
dt_node_program(dt_node_t *lnp)
{
	dt_node_t *dnp = dt_node_alloc(DT_NODE_PROG);
	dnp->dn_list = lnp;
	return (dnp);
}

/*
 * This function provides the underlying implementation of cooking an
 * identifier given its node, a hash of dynamic identifiers, an identifier
 * kind, and a boolean flag indicating whether we are allowed to instantiate
 * a new identifier if the string is not found.  This function is either
 * called from dt_cook_ident(), below, or directly by the various cooking
 * routines that are allowed to instantiate identifiers (e.g. op2 TOK_ASGN).
 */
static void
dt_xcook_ident(dt_node_t *dnp, dt_idhash_t *dhp, uint_t idkind, int create)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	const char *sname = dt_idhash_name(dhp);
	int uref = 0;

	dtrace_attribute_t attr = _dtrace_defattr;
	dt_ident_t *idp;
	dtrace_syminfo_t dts;
	GElf_Sym sym;

	const char *scope, *mark;
	uchar_t dnkind;
	char *name;

	/*
	 * Look for scoping marks in the identifier.  If one is found, set our
	 * scope to either DTRACE_OBJ_KMODS or UMODS or to the first part of
	 * the string that specifies the scope using an explicit module name.
	 * If two marks in a row are found, set 'uref' (user symbol reference).
	 * Otherwise we set scope to DTRACE_OBJ_EXEC, indicating that normal
	 * scope is desired and we should search the specified idhash.
	 */
	if ((name = strrchr(dnp->dn_string, '`')) != NULL) {
		if (name > dnp->dn_string && name[-1] == '`') {
			uref++;
			name[-1] = '\0';
		}

		if (name == dnp->dn_string + uref)
			scope = uref ? DTRACE_OBJ_UMODS : DTRACE_OBJ_KMODS;
		else
			scope = dnp->dn_string;

		*name++ = '\0'; /* leave name pointing after scoping mark */
		dnkind = DT_NODE_VAR;

	} else if (idkind == DT_IDENT_AGG) {
		scope = DTRACE_OBJ_EXEC;
		name = dnp->dn_string + 1;
		dnkind = DT_NODE_AGG;
	} else {
		scope = DTRACE_OBJ_EXEC;
		name = dnp->dn_string;
		dnkind = DT_NODE_VAR;
	}

	/*
	 * If create is set to false, and we fail our idhash lookup, preset
	 * the errno code to EDT_NOVAR for our final error message below.
	 * If we end up calling dtrace_lookup_by_name(), it will reset the
	 * errno appropriately and that error will be reported instead.
	 */
	(void) dt_set_errno(dtp, EDT_NOVAR);
	mark = uref ? "``" : "`";

	if (scope == DTRACE_OBJ_EXEC && (
	    (dhp != dtp->dt_globals &&
	    (idp = dt_idhash_lookup(dhp, name)) != NULL) ||
	    (dhp == dtp->dt_globals &&
	    (idp = dt_idstack_lookup(&yypcb->pcb_globals, name)) != NULL))) {
		/*
		 * Check that we are referencing the ident in the manner that
		 * matches its type if this is a global lookup.  In the TLS or
		 * local case, we don't know how the ident will be used until
		 * the time operator -> is seen; more parsing is needed.
		 */
		if (idp->di_kind != idkind && dhp == dtp->dt_globals) {
			xyerror(D_IDENT_BADREF, "%s '%s' may not be referenced "
			    "as %s\n", dt_idkind_name(idp->di_kind),
			    idp->di_name, dt_idkind_name(idkind));
		}

		/*
		 * Arrays and aggregations are not cooked individually. They
		 * have dynamic types and must be referenced using operator [].
		 * This is handled explicitly by the code for DT_TOK_LBRAC.
		 */
		if (idp->di_kind != DT_IDENT_ARRAY &&
		    idp->di_kind != DT_IDENT_AGG)
			attr = dt_ident_cook(dnp, idp, NULL);
		else {
			dt_node_type_assign(dnp,
			    DT_DYN_CTFP(dtp), DT_DYN_TYPE(dtp), B_FALSE);
			attr = idp->di_attr;
		}

		free(dnp->dn_string);
		dnp->dn_string = NULL;
		dnp->dn_kind = dnkind;
		dnp->dn_ident = idp;
		dnp->dn_flags |= DT_NF_LVALUE;

		if (idp->di_flags & DT_IDFLG_WRITE)
			dnp->dn_flags |= DT_NF_WRITABLE;

		dt_node_attr_assign(dnp, attr);

	} else if (dhp == dtp->dt_globals && scope != DTRACE_OBJ_EXEC &&
	    dtrace_lookup_by_name(dtp, scope, name, &sym, &dts) == 0) {

		dt_module_t *mp = dt_module_lookup_by_name(dtp, dts.dts_object);
		int umod = (mp->dm_flags & DT_DM_KERNEL) == 0;
		static const char *const kunames[] = { "kernel", "user" };

		dtrace_typeinfo_t dtt;
		dtrace_syminfo_t *sip;

		if (uref ^ umod) {
			xyerror(D_SYM_BADREF, "%s module '%s' symbol '%s' may "
			    "not be referenced as a %s symbol\n", kunames[umod],
			    dts.dts_object, dts.dts_name, kunames[uref]);
		}

		if (dtrace_symbol_type(dtp, &sym, &dts, &dtt) != 0) {
			/*
			 * For now, we special-case EDT_DATAMODEL to clarify
			 * that mixed data models are not currently supported.
			 */
			if (dtp->dt_errno == EDT_DATAMODEL) {
				xyerror(D_SYM_MODEL, "cannot use %s symbol "
				    "%s%s%s in a %s D program\n",
				    dt_module_modelname(mp),
				    dts.dts_object, mark, dts.dts_name,
				    dt_module_modelname(dtp->dt_ddefs));
			}

			xyerror(D_SYM_NOTYPES,
			    "no symbolic type information is available for "
			    "%s%s%s: %s\n", dts.dts_object, mark, dts.dts_name,
			    dtrace_errmsg(dtp, dtrace_errno(dtp)));
		}

		idp = dt_ident_create(name, DT_IDENT_SYMBOL, 0, 0,
		    _dtrace_symattr, 0, &dt_idops_thaw, NULL, dtp->dt_gen);

		if (idp == NULL)
			longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

		if (mp->dm_flags & DT_DM_PRIMARY)
			idp->di_flags |= DT_IDFLG_PRIM;

		idp->di_next = dtp->dt_externs;
		dtp->dt_externs = idp;

		if ((sip = malloc(sizeof (dtrace_syminfo_t))) == NULL)
			longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

		bcopy(&dts, sip, sizeof (dtrace_syminfo_t));
		idp->di_data = sip;
		idp->di_ctfp = dtt.dtt_ctfp;
		idp->di_type = dtt.dtt_type;

		free(dnp->dn_string);
		dnp->dn_string = NULL;
		dnp->dn_kind = DT_NODE_SYM;
		dnp->dn_ident = idp;
		dnp->dn_flags |= DT_NF_LVALUE;

		dt_node_type_assign(dnp, dtt.dtt_ctfp, dtt.dtt_type,
		    dtt.dtt_flags);
		dt_node_attr_assign(dnp, _dtrace_symattr);

		if (uref) {
			idp->di_flags |= DT_IDFLG_USER;
			dnp->dn_flags |= DT_NF_USERLAND;
		}

	} else if (scope == DTRACE_OBJ_EXEC && create == B_TRUE) {
		uint_t flags = DT_IDFLG_WRITE;
		uint_t id;

		if (dt_idhash_nextid(dhp, &id) == -1) {
			xyerror(D_ID_OFLOW, "cannot create %s: limit on number "
			    "of %s variables exceeded\n", name, sname);
		}

		if (dhp == yypcb->pcb_locals)
			flags |= DT_IDFLG_LOCAL;
		else if (dhp == dtp->dt_tls)
			flags |= DT_IDFLG_TLS;

		dt_dprintf("create %s %s variable %s, id=%u\n",
		    sname, dt_idkind_name(idkind), name, id);

		if (idkind == DT_IDENT_ARRAY || idkind == DT_IDENT_AGG) {
			idp = dt_idhash_insert(dhp, name,
			    idkind, flags, id, _dtrace_defattr, 0,
			    &dt_idops_assc, NULL, dtp->dt_gen);
		} else {
			idp = dt_idhash_insert(dhp, name,
			    idkind, flags, id, _dtrace_defattr, 0,
			    &dt_idops_thaw, NULL, dtp->dt_gen);
		}

		if (idp == NULL)
			longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);

		/*
		 * Arrays and aggregations are not cooked individually. They
		 * have dynamic types and must be referenced using operator [].
		 * This is handled explicitly by the code for DT_TOK_LBRAC.
		 */
		if (idp->di_kind != DT_IDENT_ARRAY &&
		    idp->di_kind != DT_IDENT_AGG)
			attr = dt_ident_cook(dnp, idp, NULL);
		else {
			dt_node_type_assign(dnp,
			    DT_DYN_CTFP(dtp), DT_DYN_TYPE(dtp), B_FALSE);
			attr = idp->di_attr;
		}

		free(dnp->dn_string);
		dnp->dn_string = NULL;
		dnp->dn_kind = dnkind;
		dnp->dn_ident = idp;
		dnp->dn_flags |= DT_NF_LVALUE | DT_NF_WRITABLE;

		dt_node_attr_assign(dnp, attr);

	} else if (scope != DTRACE_OBJ_EXEC) {
		xyerror(D_IDENT_UNDEF, "failed to resolve %s%s%s: %s\n",
		    dnp->dn_string, mark, name,
		    dtrace_errmsg(dtp, dtrace_errno(dtp)));
	} else {
		xyerror(D_IDENT_UNDEF, "failed to resolve %s: %s\n",
		    dnp->dn_string, dtrace_errmsg(dtp, dtrace_errno(dtp)));
	}
}

static dt_node_t *
dt_cook_ident(dt_node_t *dnp, uint_t idflags)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;

	if (dnp->dn_op == DT_TOK_AGG)
		dt_xcook_ident(dnp, dtp->dt_aggs, DT_IDENT_AGG, B_FALSE);
	else
		dt_xcook_ident(dnp, dtp->dt_globals, DT_IDENT_SCALAR, B_FALSE);

	return (dt_node_cook(dnp, idflags));
}

/*
 * Since operators [ and -> can instantiate new variables before we know
 * whether the reference is for a read or a write, we need to check read
 * references to determine if the identifier is currently dt_ident_unref().
 * If so, we report that this first access was to an undefined variable.
 */
static dt_node_t *
dt_cook_var(dt_node_t *dnp, uint_t idflags)
{
	dt_ident_t *idp = dnp->dn_ident;

	if ((idflags & DT_IDFLG_REF) && dt_ident_unref(idp)) {
		dnerror(dnp, D_VAR_UNDEF,
		    "%s%s has not yet been declared or assigned\n",
		    (idp->di_flags & DT_IDFLG_LOCAL) ? "this->" :
		    (idp->di_flags & DT_IDFLG_TLS) ? "self->" : "",
		    idp->di_name);
	}

	dt_node_attr_assign(dnp, dt_ident_cook(dnp, idp, &dnp->dn_args));
	return (dnp);
}

/*ARGSUSED*/
static dt_node_t *
dt_cook_func(dt_node_t *dnp, uint_t idflags)
{
	dt_node_attr_assign(dnp,
	    dt_ident_cook(dnp, dnp->dn_ident, &dnp->dn_args));

	return (dnp);
}

static dt_node_t *
dt_cook_op1(dt_node_t *dnp, uint_t idflags)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_node_t *cp = dnp->dn_child;

	char n[DT_TYPE_NAMELEN];
	dtrace_typeinfo_t dtt;
	dt_ident_t *idp;

	ctf_encoding_t e;
	ctf_arinfo_t r;
	ctf_id_t type, base;
	uint_t kind;

	if (dnp->dn_op == DT_TOK_PREINC || dnp->dn_op == DT_TOK_POSTINC ||
	    dnp->dn_op == DT_TOK_PREDEC || dnp->dn_op == DT_TOK_POSTDEC)
		idflags = DT_IDFLG_REF | DT_IDFLG_MOD;
	else
		idflags = DT_IDFLG_REF;

	/*
	 * We allow the unary ++ and -- operators to instantiate new scalar
	 * variables if applied to an identifier; otherwise just cook as usual.
	 */
	if (cp->dn_kind == DT_NODE_IDENT && (idflags & DT_IDFLG_MOD))
		dt_xcook_ident(cp, dtp->dt_globals, DT_IDENT_SCALAR, B_TRUE);

	cp = dnp->dn_child = dt_node_cook(cp, 0); /* don't set idflags yet */

	if (cp->dn_kind == DT_NODE_VAR && dt_ident_unref(cp->dn_ident)) {
		if (dt_type_lookup("int64_t", &dtt) != 0)
			xyerror(D_TYPE_ERR, "failed to lookup int64_t\n");

		dt_ident_type_assign(cp->dn_ident, dtt.dtt_ctfp, dtt.dtt_type);
		dt_node_type_assign(cp, dtt.dtt_ctfp, dtt.dtt_type,
		    dtt.dtt_flags);
	}

	if (cp->dn_kind == DT_NODE_VAR)
		cp->dn_ident->di_flags |= idflags;

	switch (dnp->dn_op) {
	case DT_TOK_DEREF:
		/*
		 * If the deref operator is applied to a translated pointer,
		 * we set our output type to the output of the translation.
		 */
		if ((idp = dt_node_resolve(cp, DT_IDENT_XLPTR)) != NULL) {
			dt_xlator_t *dxp = idp->di_data;

			dnp->dn_ident = &dxp->dx_souid;
			dt_node_type_assign(dnp,
			    dnp->dn_ident->di_ctfp, dnp->dn_ident->di_type,
			    cp->dn_flags & DT_NF_USERLAND);
			break;
		}

		type = ctf_type_resolve(cp->dn_ctfp, cp->dn_type);
		kind = ctf_type_kind(cp->dn_ctfp, type);

		if (kind == CTF_K_ARRAY) {
			if (ctf_array_info(cp->dn_ctfp, type, &r) != 0) {
				dtp->dt_ctferr = ctf_errno(cp->dn_ctfp);
				longjmp(yypcb->pcb_jmpbuf, EDT_CTF);
			} else
				type = r.ctr_contents;
		} else if (kind == CTF_K_POINTER) {
			type = ctf_type_reference(cp->dn_ctfp, type);
		} else {
			xyerror(D_DEREF_NONPTR,
			    "cannot dereference non-pointer type\n");
		}

		dt_node_type_assign(dnp, cp->dn_ctfp, type,
		    cp->dn_flags & DT_NF_USERLAND);
		base = ctf_type_resolve(cp->dn_ctfp, type);
		kind = ctf_type_kind(cp->dn_ctfp, base);

		if (kind == CTF_K_INTEGER && ctf_type_encoding(cp->dn_ctfp,
		    base, &e) == 0 && IS_VOID(e)) {
			xyerror(D_DEREF_VOID,
			    "cannot dereference pointer to void\n");
		}

		if (kind == CTF_K_FUNCTION) {
			xyerror(D_DEREF_FUNC,
			    "cannot dereference pointer to function\n");
		}

		if (kind != CTF_K_ARRAY || dt_node_is_string(dnp))
			dnp->dn_flags |= DT_NF_LVALUE; /* see K&R[A7.4.3] */

		/*
		 * If we propagated the l-value bit and the child operand was
		 * a writable D variable or a binary operation of the form
		 * a + b where a is writable, then propagate the writable bit.
		 * This is necessary to permit assignments to scalar arrays,
		 * which are converted to expressions of the form *(a + i).
		 */
		if ((cp->dn_flags & DT_NF_WRITABLE) ||
		    (cp->dn_kind == DT_NODE_OP2 && cp->dn_op == DT_TOK_ADD &&
		    (cp->dn_left->dn_flags & DT_NF_WRITABLE)))
			dnp->dn_flags |= DT_NF_WRITABLE;

		if ((cp->dn_flags & DT_NF_USERLAND) &&
		    (kind == CTF_K_POINTER || (dnp->dn_flags & DT_NF_REF)))
			dnp->dn_flags |= DT_NF_USERLAND;
		break;

	case DT_TOK_IPOS:
	case DT_TOK_INEG:
		if (!dt_node_is_arith(cp)) {
			xyerror(D_OP_ARITH, "operator %s requires an operand "
			    "of arithmetic type\n", opstr(dnp->dn_op));
		}
		dt_node_type_propagate(cp, dnp); /* see K&R[A7.4.4-6] */
		break;

	case DT_TOK_BNEG:
		if (!dt_node_is_integer(cp)) {
			xyerror(D_OP_INT, "operator %s requires an operand of "
			    "integral type\n", opstr(dnp->dn_op));
		}
		dt_node_type_propagate(cp, dnp); /* see K&R[A7.4.4-6] */
		break;

	case DT_TOK_LNEG:
		if (!dt_node_is_scalar(cp)) {
			xyerror(D_OP_SCALAR, "operator %s requires an operand "
			    "of scalar type\n", opstr(dnp->dn_op));
		}
		dt_node_type_assign(dnp, DT_INT_CTFP(dtp), DT_INT_TYPE(dtp),
		    B_FALSE);
		break;

	case DT_TOK_ADDROF:
		if (cp->dn_kind == DT_NODE_VAR || cp->dn_kind == DT_NODE_AGG) {
			xyerror(D_ADDROF_VAR,
			    "cannot take address of dynamic variable\n");
		}

		if (dt_node_is_dynamic(cp)) {
			xyerror(D_ADDROF_VAR,
			    "cannot take address of dynamic object\n");
		}

		if (!(cp->dn_flags & DT_NF_LVALUE)) {
			xyerror(D_ADDROF_LVAL, /* see K&R[A7.4.2] */
			    "unacceptable operand for unary & operator\n");
		}

		if (cp->dn_flags & DT_NF_BITFIELD) {
			xyerror(D_ADDROF_BITFIELD,
			    "cannot take address of bit-field\n");
		}

		dtt.dtt_object = NULL;
		dtt.dtt_ctfp = cp->dn_ctfp;
		dtt.dtt_type = cp->dn_type;

		if (dt_type_pointer(&dtt) == -1) {
			xyerror(D_TYPE_ERR, "cannot find type for \"&\": %s*\n",
			    dt_node_type_name(cp, n, sizeof (n)));
		}

		dt_node_type_assign(dnp, dtt.dtt_ctfp, dtt.dtt_type,
		    cp->dn_flags & DT_NF_USERLAND);
		break;

	case DT_TOK_SIZEOF:
		if (cp->dn_flags & DT_NF_BITFIELD) {
			xyerror(D_SIZEOF_BITFIELD,
			    "cannot apply sizeof to a bit-field\n");
		}

		if (dt_node_sizeof(cp) == 0) {
			xyerror(D_SIZEOF_TYPE, "cannot apply sizeof to an "
			    "operand of unknown size\n");
		}

		dt_node_type_assign(dnp, dtp->dt_ddefs->dm_ctfp,
		    ctf_lookup_by_name(dtp->dt_ddefs->dm_ctfp, "size_t"),
		    B_FALSE);
		break;

	case DT_TOK_STRINGOF:
		if (!dt_node_is_scalar(cp) && !dt_node_is_pointer(cp) &&
		    !dt_node_is_strcompat(cp)) {
			xyerror(D_STRINGOF_TYPE,
			    "cannot apply stringof to a value of type %s\n",
			    dt_node_type_name(cp, n, sizeof (n)));
		}
		dt_node_type_assign(dnp, DT_STR_CTFP(dtp), DT_STR_TYPE(dtp),
		    cp->dn_flags & DT_NF_USERLAND);
		break;

	case DT_TOK_PREINC:
	case DT_TOK_POSTINC:
	case DT_TOK_PREDEC:
	case DT_TOK_POSTDEC:
		if (dt_node_is_scalar(cp) == 0) {
			xyerror(D_OP_SCALAR, "operator %s requires operand of "
			    "scalar type\n", opstr(dnp->dn_op));
		}

		if (dt_node_is_vfptr(cp)) {
			xyerror(D_OP_VFPTR, "operator %s requires an operand "
			    "of known size\n", opstr(dnp->dn_op));
		}

		if (!(cp->dn_flags & DT_NF_LVALUE)) {
			xyerror(D_OP_LVAL, "operator %s requires modifiable "
			    "lvalue as an operand\n", opstr(dnp->dn_op));
		}

		if (!(cp->dn_flags & DT_NF_WRITABLE)) {
			xyerror(D_OP_WRITE, "operator %s can only be applied "
			    "to a writable variable\n", opstr(dnp->dn_op));
		}

		dt_node_type_propagate(cp, dnp); /* see K&R[A7.4.1] */
		break;

	default:
		xyerror(D_UNKNOWN, "invalid unary op %s\n", opstr(dnp->dn_op));
	}

	dt_node_attr_assign(dnp, cp->dn_attr);
	return (dnp);
}

static void
dt_assign_common(dt_node_t *dnp)
{
	dt_node_t *lp = dnp->dn_left;
	dt_node_t *rp = dnp->dn_right;
	int op = dnp->dn_op;

	if (rp->dn_kind == DT_NODE_INT)
		dt_cast(lp, rp);

	if (!(lp->dn_flags & DT_NF_LVALUE)) {
		xyerror(D_OP_LVAL, "operator %s requires modifiable "
		    "lvalue as an operand\n", opstr(op));
		/* see K&R[A7.17] */
	}

	if (!(lp->dn_flags & DT_NF_WRITABLE)) {
		xyerror(D_OP_WRITE, "operator %s can only be applied "
		    "to a writable variable\n", opstr(op));
	}

	dt_node_type_propagate(lp, dnp); /* see K&R[A7.17] */
	dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));
}

static dt_node_t *
dt_cook_op2(dt_node_t *dnp, uint_t idflags)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_node_t *lp = dnp->dn_left;
	dt_node_t *rp = dnp->dn_right;
	int op = dnp->dn_op;

	ctf_membinfo_t m;
	ctf_file_t *ctfp;
	ctf_id_t type;
	int kind, val, uref;
	dt_ident_t *idp;

	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	/*
	 * The expression E1[E2] is identical by definition to *((E1)+(E2)) so
	 * we convert "[" to "+" and glue on "*" at the end (see K&R[A7.3.1])
	 * unless the left-hand side is an untyped D scalar, associative array,
	 * or aggregation.  In these cases, we proceed to case DT_TOK_LBRAC and
	 * handle associative array and aggregation references there.
	 */
	if (op == DT_TOK_LBRAC) {
		if (lp->dn_kind == DT_NODE_IDENT) {
			dt_idhash_t *dhp;
			uint_t idkind;

			if (lp->dn_op == DT_TOK_AGG) {
				dhp = dtp->dt_aggs;
				idp = dt_idhash_lookup(dhp, lp->dn_string + 1);
				idkind = DT_IDENT_AGG;
			} else {
				dhp = dtp->dt_globals;
				idp = dt_idstack_lookup(
				    &yypcb->pcb_globals, lp->dn_string);
				idkind = DT_IDENT_ARRAY;
			}

			if (idp == NULL || dt_ident_unref(idp))
				dt_xcook_ident(lp, dhp, idkind, B_TRUE);
			else
				dt_xcook_ident(lp, dhp, idp->di_kind, B_FALSE);
		} else
			lp = dnp->dn_left = dt_node_cook(lp, 0);

		/*
		 * Switch op to '+' for *(E1 + E2) array mode in these cases:
		 * (a) lp is a DT_IDENT_ARRAY variable that has already been
		 *	referenced using [] notation (dn_args != NULL).
		 * (b) lp is a non-ARRAY variable that has already been given
		 *	a type by assignment or declaration (!dt_ident_unref())
		 * (c) lp is neither a variable nor an aggregation
		 */
		if (lp->dn_kind == DT_NODE_VAR) {
			if (lp->dn_ident->di_kind == DT_IDENT_ARRAY) {
				if (lp->dn_args != NULL)
					op = DT_TOK_ADD;
			} else if (!dt_ident_unref(lp->dn_ident))
				op = DT_TOK_ADD;
		} else if (lp->dn_kind != DT_NODE_AGG)
			op = DT_TOK_ADD;
	}

	switch (op) {
	case DT_TOK_BAND:
	case DT_TOK_XOR:
	case DT_TOK_BOR:
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		if (!dt_node_is_integer(lp) || !dt_node_is_integer(rp)) {
			xyerror(D_OP_INT, "operator %s requires operands of "
			    "integral type\n", opstr(op));
		}

		dt_node_promote(lp, rp, dnp); /* see K&R[A7.11-13] */
		break;

	case DT_TOK_LSH:
	case DT_TOK_RSH:
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		if (!dt_node_is_integer(lp) || !dt_node_is_integer(rp)) {
			xyerror(D_OP_INT, "operator %s requires operands of "
			    "integral type\n", opstr(op));
		}

		dt_node_type_propagate(lp, dnp); /* see K&R[A7.8] */
		dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));
		break;

	case DT_TOK_MOD:
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		if (!dt_node_is_integer(lp) || !dt_node_is_integer(rp)) {
			xyerror(D_OP_INT, "operator %s requires operands of "
			    "integral type\n", opstr(op));
		}

		dt_node_promote(lp, rp, dnp); /* see K&R[A7.6] */
		break;

	case DT_TOK_MUL:
	case DT_TOK_DIV:
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		if (!dt_node_is_arith(lp) || !dt_node_is_arith(rp)) {
			xyerror(D_OP_ARITH, "operator %s requires operands of "
			    "arithmetic type\n", opstr(op));
		}

		dt_node_promote(lp, rp, dnp); /* see K&R[A7.6] */
		break;

	case DT_TOK_LAND:
	case DT_TOK_LXOR:
	case DT_TOK_LOR:
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		if (!dt_node_is_scalar(lp) || !dt_node_is_scalar(rp)) {
			xyerror(D_OP_SCALAR, "operator %s requires operands "
			    "of scalar type\n", opstr(op));
		}

		dt_node_type_assign(dnp, DT_INT_CTFP(dtp), DT_INT_TYPE(dtp),
		    B_FALSE);
		dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));
		break;

	case DT_TOK_LT:
	case DT_TOK_LE:
	case DT_TOK_GT:
	case DT_TOK_GE:
	case DT_TOK_EQU:
	case DT_TOK_NEQ:
		/*
		 * The D comparison operators provide the ability to transform
		 * a right-hand identifier into a corresponding enum tag value
		 * if the left-hand side is an enum type.  To do this, we cook
		 * the left-hand side, and then see if the right-hand side is
		 * an unscoped identifier defined in the enum.  If so, we
		 * convert into an integer constant node with the tag's value.
		 */
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);

		kind = ctf_type_kind(lp->dn_ctfp,
		    ctf_type_resolve(lp->dn_ctfp, lp->dn_type));

		if (kind == CTF_K_ENUM && rp->dn_kind == DT_NODE_IDENT &&
		    strchr(rp->dn_string, '`') == NULL && ctf_enum_value(
		    lp->dn_ctfp, lp->dn_type, rp->dn_string, &val) == 0) {

			if ((idp = dt_idstack_lookup(&yypcb->pcb_globals,
			    rp->dn_string)) != NULL) {
				xyerror(D_IDENT_AMBIG,
				    "ambiguous use of operator %s: %s is "
				    "both a %s enum tag and a global %s\n",
				    opstr(op), rp->dn_string,
				    dt_node_type_name(lp, n1, sizeof (n1)),
				    dt_idkind_name(idp->di_kind));
			}

			free(rp->dn_string);
			rp->dn_string = NULL;
			rp->dn_kind = DT_NODE_INT;
			rp->dn_flags |= DT_NF_COOKED;
			rp->dn_op = DT_TOK_INT;
			rp->dn_value = (intmax_t)val;

			dt_node_type_assign(rp, lp->dn_ctfp, lp->dn_type,
			    B_FALSE);
			dt_node_attr_assign(rp, _dtrace_symattr);
		}

		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		/*
		 * The rules for type checking for the relational operators are
		 * described in the ANSI-C spec (see K&R[A7.9-10]).  We perform
		 * the various tests in order from least to most expensive.  We
		 * also allow derived strings to be compared as a first-class
		 * type (resulting in a strcmp(3C)-style comparison), and we
		 * slightly relax the A7.9 rules to permit void pointer
		 * comparisons as in A7.10.  Our users won't be confused by
		 * this since they understand pointers are just numbers, and
		 * relaxing this constraint simplifies the implementation.
		 */
		if (ctf_type_compat(lp->dn_ctfp, lp->dn_type,
		    rp->dn_ctfp, rp->dn_type))
			/*EMPTY*/;
		else if (dt_node_is_integer(lp) && dt_node_is_integer(rp))
			/*EMPTY*/;
		else if (dt_node_is_strcompat(lp) && dt_node_is_strcompat(rp) &&
		    (dt_node_is_string(lp) || dt_node_is_string(rp)))
			/*EMPTY*/;
		else if (dt_node_is_ptrcompat(lp, rp, NULL, NULL) == 0) {
			xyerror(D_OP_INCOMPAT, "operands have "
			    "incompatible types: \"%s\" %s \"%s\"\n",
			    dt_node_type_name(lp, n1, sizeof (n1)), opstr(op),
			    dt_node_type_name(rp, n2, sizeof (n2)));
		}

		dt_node_type_assign(dnp, DT_INT_CTFP(dtp), DT_INT_TYPE(dtp),
		    B_FALSE);
		dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));
		break;

	case DT_TOK_ADD:
	case DT_TOK_SUB: {
		/*
		 * The rules for type checking for the additive operators are
		 * described in the ANSI-C spec (see K&R[A7.7]).  Pointers and
		 * integers may be manipulated according to specific rules.  In
		 * these cases D permits strings to be treated as pointers.
		 */
		int lp_is_ptr, lp_is_int, rp_is_ptr, rp_is_int;

		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		lp_is_ptr = dt_node_is_string(lp) ||
		    (dt_node_is_pointer(lp) && !dt_node_is_vfptr(lp));
		lp_is_int = dt_node_is_integer(lp);

		rp_is_ptr = dt_node_is_string(rp) ||
		    (dt_node_is_pointer(rp) && !dt_node_is_vfptr(rp));
		rp_is_int = dt_node_is_integer(rp);

		if (lp_is_int && rp_is_int) {
			dt_type_promote(lp, rp, &ctfp, &type);
			uref = 0;
		} else if (lp_is_ptr && rp_is_int) {
			ctfp = lp->dn_ctfp;
			type = lp->dn_type;
			uref = lp->dn_flags & DT_NF_USERLAND;
		} else if (lp_is_int && rp_is_ptr && op == DT_TOK_ADD) {
			ctfp = rp->dn_ctfp;
			type = rp->dn_type;
			uref = rp->dn_flags & DT_NF_USERLAND;
		} else if (lp_is_ptr && rp_is_ptr && op == DT_TOK_SUB &&
		    dt_node_is_ptrcompat(lp, rp, NULL, NULL)) {
			ctfp = dtp->dt_ddefs->dm_ctfp;
			type = ctf_lookup_by_name(ctfp, "ptrdiff_t");
			uref = 0;
		} else {
			xyerror(D_OP_INCOMPAT, "operands have incompatible "
			    "types: \"%s\" %s \"%s\"\n",
			    dt_node_type_name(lp, n1, sizeof (n1)), opstr(op),
			    dt_node_type_name(rp, n2, sizeof (n2)));
		}

		dt_node_type_assign(dnp, ctfp, type, B_FALSE);
		dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));

		if (uref)
			dnp->dn_flags |= DT_NF_USERLAND;
		break;
	}

	case DT_TOK_OR_EQ:
	case DT_TOK_XOR_EQ:
	case DT_TOK_AND_EQ:
	case DT_TOK_LSH_EQ:
	case DT_TOK_RSH_EQ:
	case DT_TOK_MOD_EQ:
		if (lp->dn_kind == DT_NODE_IDENT) {
			dt_xcook_ident(lp, dtp->dt_globals,
			    DT_IDENT_SCALAR, B_TRUE);
		}

		lp = dnp->dn_left =
		    dt_node_cook(lp, DT_IDFLG_REF | DT_IDFLG_MOD);

		rp = dnp->dn_right =
		    dt_node_cook(rp, DT_IDFLG_REF | DT_IDFLG_MOD);

		if (!dt_node_is_integer(lp) || !dt_node_is_integer(rp)) {
			xyerror(D_OP_INT, "operator %s requires operands of "
			    "integral type\n", opstr(op));
		}
		goto asgn_common;

	case DT_TOK_MUL_EQ:
	case DT_TOK_DIV_EQ:
		if (lp->dn_kind == DT_NODE_IDENT) {
			dt_xcook_ident(lp, dtp->dt_globals,
			    DT_IDENT_SCALAR, B_TRUE);
		}

		lp = dnp->dn_left =
		    dt_node_cook(lp, DT_IDFLG_REF | DT_IDFLG_MOD);

		rp = dnp->dn_right =
		    dt_node_cook(rp, DT_IDFLG_REF | DT_IDFLG_MOD);

		if (!dt_node_is_arith(lp) || !dt_node_is_arith(rp)) {
			xyerror(D_OP_ARITH, "operator %s requires operands of "
			    "arithmetic type\n", opstr(op));
		}
		goto asgn_common;

	case DT_TOK_ASGN:
		/*
		 * If the left-hand side is an identifier, attempt to resolve
		 * it as either an aggregation or scalar variable.  We pass
		 * B_TRUE to dt_xcook_ident to indicate that a new variable can
		 * be created if no matching variable exists in the namespace.
		 */
		if (lp->dn_kind == DT_NODE_IDENT) {
			if (lp->dn_op == DT_TOK_AGG) {
				dt_xcook_ident(lp, dtp->dt_aggs,
				    DT_IDENT_AGG, B_TRUE);
			} else {
				dt_xcook_ident(lp, dtp->dt_globals,
				    DT_IDENT_SCALAR, B_TRUE);
			}
		}

		lp = dnp->dn_left = dt_node_cook(lp, 0); /* don't set mod yet */
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		/*
		 * If the left-hand side is an aggregation, verify that we are
		 * assigning it the result of an aggregating function.  Once
		 * we've done so, hide the func node in the aggregation and
		 * return the aggregation itself up to the parse tree parent.
		 * This transformation is legal since the assigned function
		 * cannot change identity across disjoint cooking passes and
		 * the argument list subtree is retained for later cooking.
		 */
		if (lp->dn_kind == DT_NODE_AGG) {
			const char *aname = lp->dn_ident->di_name;
			dt_ident_t *oid = lp->dn_ident->di_iarg;

			if (rp->dn_kind != DT_NODE_FUNC ||
			    rp->dn_ident->di_kind != DT_IDENT_AGGFUNC) {
				xyerror(D_AGG_FUNC,
				    "@%s must be assigned the result of "
				    "an aggregating function\n", aname);
			}

			if (oid != NULL && oid != rp->dn_ident) {
				xyerror(D_AGG_REDEF,
				    "aggregation redefined: @%s\n\t "
				    "current: @%s = %s( )\n\tprevious: @%s = "
				    "%s( ) : line %d\n", aname, aname,
				    rp->dn_ident->di_name, aname, oid->di_name,
				    lp->dn_ident->di_lineno);
			} else if (oid == NULL)
				lp->dn_ident->di_iarg = rp->dn_ident;

			/*
			 * Do not allow multiple aggregation assignments in a
			 * single statement, e.g. (@a = count()) = count();
			 * We produce a message as if the result of aggregating
			 * function does not propagate DT_NF_LVALUE.
			 */
			if (lp->dn_aggfun != NULL) {
				xyerror(D_OP_LVAL, "operator = requires "
				    "modifiable lvalue as an operand\n");
			}

			lp->dn_aggfun = rp;
			lp = dt_node_cook(lp, DT_IDFLG_MOD);

			dnp->dn_left = dnp->dn_right = NULL;
			dt_node_free(dnp);

			return (lp);
		}

		/*
		 * If the right-hand side is a dynamic variable that is the
		 * output of a translator, our result is the translated type.
		 */
		if ((idp = dt_node_resolve(rp, DT_IDENT_XLSOU)) != NULL) {
			ctfp = idp->di_ctfp;
			type = idp->di_type;
			uref = idp->di_flags & DT_IDFLG_USER;
		} else {
			ctfp = rp->dn_ctfp;
			type = rp->dn_type;
			uref = rp->dn_flags & DT_NF_USERLAND;
		}

		/*
		 * If the left-hand side of an assignment statement is a virgin
		 * variable created by this compilation pass, reset the type of
		 * this variable to the type of the right-hand side.
		 */
		if (lp->dn_kind == DT_NODE_VAR &&
		    dt_ident_unref(lp->dn_ident)) {
			dt_node_type_assign(lp, ctfp, type, B_FALSE);
			dt_ident_type_assign(lp->dn_ident, ctfp, type);

			if (uref) {
				lp->dn_flags |= DT_NF_USERLAND;
				lp->dn_ident->di_flags |= DT_IDFLG_USER;
			}
		}

		if (lp->dn_kind == DT_NODE_VAR)
			lp->dn_ident->di_flags |= DT_IDFLG_MOD;

		/*
		 * The rules for type checking for the assignment operators are
		 * described in the ANSI-C spec (see K&R[A7.17]).  We share
		 * most of this code with the argument list checking code.
		 */
		if (!dt_node_is_string(lp)) {
			kind = ctf_type_kind(lp->dn_ctfp,
			    ctf_type_resolve(lp->dn_ctfp, lp->dn_type));

			if (kind == CTF_K_ARRAY || kind == CTF_K_FUNCTION) {
				xyerror(D_OP_ARRFUN, "operator %s may not be "
				    "applied to operand of type \"%s\"\n",
				    opstr(op),
				    dt_node_type_name(lp, n1, sizeof (n1)));
			}
		}

		if (idp != NULL && idp->di_kind == DT_IDENT_XLSOU &&
		    ctf_type_compat(lp->dn_ctfp, lp->dn_type, ctfp, type))
			goto asgn_common;

		if (dt_node_is_argcompat(lp, rp))
			goto asgn_common;

		xyerror(D_OP_INCOMPAT,
		    "operands have incompatible types: \"%s\" %s \"%s\"\n",
		    dt_node_type_name(lp, n1, sizeof (n1)), opstr(op),
		    dt_node_type_name(rp, n2, sizeof (n2)));
		/*NOTREACHED*/

	case DT_TOK_ADD_EQ:
	case DT_TOK_SUB_EQ:
		if (lp->dn_kind == DT_NODE_IDENT) {
			dt_xcook_ident(lp, dtp->dt_globals,
			    DT_IDENT_SCALAR, B_TRUE);
		}

		lp = dnp->dn_left =
		    dt_node_cook(lp, DT_IDFLG_REF | DT_IDFLG_MOD);

		rp = dnp->dn_right =
		    dt_node_cook(rp, DT_IDFLG_REF | DT_IDFLG_MOD);

		if (dt_node_is_string(lp) || dt_node_is_string(rp)) {
			xyerror(D_OP_INCOMPAT, "operands have "
			    "incompatible types: \"%s\" %s \"%s\"\n",
			    dt_node_type_name(lp, n1, sizeof (n1)), opstr(op),
			    dt_node_type_name(rp, n2, sizeof (n2)));
		}

		/*
		 * The rules for type checking for the assignment operators are
		 * described in the ANSI-C spec (see K&R[A7.17]).  To these
		 * rules we add that only writable D nodes can be modified.
		 */
		if (dt_node_is_integer(lp) == 0 ||
		    dt_node_is_integer(rp) == 0) {
			if (!dt_node_is_pointer(lp) || dt_node_is_vfptr(lp)) {
				xyerror(D_OP_VFPTR,
				    "operator %s requires left-hand scalar "
				    "operand of known size\n", opstr(op));
			} else if (dt_node_is_integer(rp) == 0 &&
			    dt_node_is_ptrcompat(lp, rp, NULL, NULL) == 0) {
				xyerror(D_OP_INCOMPAT, "operands have "
				    "incompatible types: \"%s\" %s \"%s\"\n",
				    dt_node_type_name(lp, n1, sizeof (n1)),
				    opstr(op),
				    dt_node_type_name(rp, n2, sizeof (n2)));
			}
		}
asgn_common:
		dt_assign_common(dnp);
		break;

	case DT_TOK_PTR:
		/*
		 * If the left-hand side of operator -> is the name "self",
		 * then we permit a TLS variable to be created or referenced.
		 */
		if (lp->dn_kind == DT_NODE_IDENT &&
		    strcmp(lp->dn_string, "self") == 0) {
			if (rp->dn_kind != DT_NODE_VAR) {
				dt_xcook_ident(rp, dtp->dt_tls,
				    DT_IDENT_SCALAR, B_TRUE);
			}

			if (idflags != 0)
				rp = dt_node_cook(rp, idflags);

			dnp->dn_right = dnp->dn_left; /* avoid freeing rp */
			dt_node_free(dnp);
			return (rp);
		}

		/*
		 * If the left-hand side of operator -> is the name "this",
		 * then we permit a local variable to be created or referenced.
		 */
		if (lp->dn_kind == DT_NODE_IDENT &&
		    strcmp(lp->dn_string, "this") == 0) {
			if (rp->dn_kind != DT_NODE_VAR) {
				dt_xcook_ident(rp, yypcb->pcb_locals,
				    DT_IDENT_SCALAR, B_TRUE);
			}

			if (idflags != 0)
				rp = dt_node_cook(rp, idflags);

			dnp->dn_right = dnp->dn_left; /* avoid freeing rp */
			dt_node_free(dnp);
			return (rp);
		}

		/*FALLTHRU*/

	case DT_TOK_DOT:
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);

		if (rp->dn_kind != DT_NODE_IDENT) {
			xyerror(D_OP_IDENT, "operator %s must be followed by "
			    "an identifier\n", opstr(op));
		}

		if ((idp = dt_node_resolve(lp, DT_IDENT_XLSOU)) != NULL ||
		    (idp = dt_node_resolve(lp, DT_IDENT_XLPTR)) != NULL) {
			/*
			 * If the left-hand side is a translated struct or ptr,
			 * the type of the left is the translation output type.
			 */
			dt_xlator_t *dxp = idp->di_data;

			if (dt_xlator_member(dxp, rp->dn_string) == NULL) {
				xyerror(D_XLATE_NOCONV,
				    "translator does not define conversion "
				    "for member: %s\n", rp->dn_string);
			}

			ctfp = idp->di_ctfp;
			type = ctf_type_resolve(ctfp, idp->di_type);
			uref = idp->di_flags & DT_IDFLG_USER;
		} else {
			ctfp = lp->dn_ctfp;
			type = ctf_type_resolve(ctfp, lp->dn_type);
			uref = lp->dn_flags & DT_NF_USERLAND;
		}

		kind = ctf_type_kind(ctfp, type);

		if (op == DT_TOK_PTR) {
			if (kind != CTF_K_POINTER) {
				xyerror(D_OP_PTR, "operator %s must be "
				    "applied to a pointer\n", opstr(op));
			}
			type = ctf_type_reference(ctfp, type);
			type = ctf_type_resolve(ctfp, type);
			kind = ctf_type_kind(ctfp, type);
		}

		/*
		 * If we follow a reference to a forward declaration tag,
		 * search the entire type space for the actual definition.
		 */
		while (kind == CTF_K_FORWARD) {
			char *tag = ctf_type_name(ctfp, type, n1, sizeof (n1));
			dtrace_typeinfo_t dtt;

			if (tag != NULL && dt_type_lookup(tag, &dtt) == 0 &&
			    (dtt.dtt_ctfp != ctfp || dtt.dtt_type != type)) {
				ctfp = dtt.dtt_ctfp;
				type = ctf_type_resolve(ctfp, dtt.dtt_type);
				kind = ctf_type_kind(ctfp, type);
			} else {
				xyerror(D_OP_INCOMPLETE,
				    "operator %s cannot be applied to a "
				    "forward declaration: no %s definition "
				    "is available\n", opstr(op), tag);
			}
		}

		if (kind != CTF_K_STRUCT && kind != CTF_K_UNION) {
			if (op == DT_TOK_PTR) {
				xyerror(D_OP_SOU, "operator -> cannot be "
				    "applied to pointer to type \"%s\"; must "
				    "be applied to a struct or union pointer\n",
				    ctf_type_name(ctfp, type, n1, sizeof (n1)));
			} else {
				xyerror(D_OP_SOU, "operator %s cannot be "
				    "applied to type \"%s\"; must be applied "
				    "to a struct or union\n", opstr(op),
				    ctf_type_name(ctfp, type, n1, sizeof (n1)));
			}
		}

		if (ctf_member_info(ctfp, type, rp->dn_string, &m) == CTF_ERR) {
			xyerror(D_TYPE_MEMBER,
			    "%s is not a member of %s\n", rp->dn_string,
			    ctf_type_name(ctfp, type, n1, sizeof (n1)));
		}

		type = ctf_type_resolve(ctfp, m.ctm_type);
		kind = ctf_type_kind(ctfp, type);

		dt_node_type_assign(dnp, ctfp, m.ctm_type, B_FALSE);
		dt_node_attr_assign(dnp, lp->dn_attr);

		if (op == DT_TOK_PTR && (kind != CTF_K_ARRAY ||
		    dt_node_is_string(dnp)))
			dnp->dn_flags |= DT_NF_LVALUE; /* see K&R[A7.3.3] */

		if (op == DT_TOK_DOT && (lp->dn_flags & DT_NF_LVALUE) &&
		    (kind != CTF_K_ARRAY || dt_node_is_string(dnp)))
			dnp->dn_flags |= DT_NF_LVALUE; /* see K&R[A7.3.3] */

		if (lp->dn_flags & DT_NF_WRITABLE)
			dnp->dn_flags |= DT_NF_WRITABLE;

		if (uref && (kind == CTF_K_POINTER ||
		    (dnp->dn_flags & DT_NF_REF)))
			dnp->dn_flags |= DT_NF_USERLAND;
		break;

	case DT_TOK_LBRAC: {
		/*
		 * If op is DT_TOK_LBRAC, we know from the special-case code at
		 * the top that lp is either a D variable or an aggregation.
		 */
		dt_node_t *lnp;

		/*
		 * If the left-hand side is an aggregation, just set dn_aggtup
		 * to the right-hand side and return the cooked aggregation.
		 * This transformation is legal since we are just collapsing
		 * nodes to simplify later processing, and the entire aggtup
		 * parse subtree is retained for subsequent cooking passes.
		 */
		if (lp->dn_kind == DT_NODE_AGG) {
			if (lp->dn_aggtup != NULL) {
				xyerror(D_AGG_MDIM, "improper attempt to "
				    "reference @%s as a multi-dimensional "
				    "array\n", lp->dn_ident->di_name);
			}

			lp->dn_aggtup = rp;
			lp = dt_node_cook(lp, 0);

			dnp->dn_left = dnp->dn_right = NULL;
			dt_node_free(dnp);

			return (lp);
		}

		assert(lp->dn_kind == DT_NODE_VAR);
		idp = lp->dn_ident;

		/*
		 * If the left-hand side is a non-global scalar that hasn't yet
		 * been referenced or modified, it was just created by self->
		 * or this-> and we can convert it from scalar to assoc array.
		 */
		if (idp->di_kind == DT_IDENT_SCALAR && dt_ident_unref(idp) &&
		    (idp->di_flags & (DT_IDFLG_LOCAL | DT_IDFLG_TLS)) != 0) {

			if (idp->di_flags & DT_IDFLG_LOCAL) {
				xyerror(D_ARR_LOCAL,
				    "local variables may not be used as "
				    "associative arrays: %s\n", idp->di_name);
			}

			dt_dprintf("morph variable %s (id %u) from scalar to "
			    "array\n", idp->di_name, idp->di_id);

			dt_ident_morph(idp, DT_IDENT_ARRAY,
			    &dt_idops_assc, NULL);
		}

		if (idp->di_kind != DT_IDENT_ARRAY) {
			xyerror(D_IDENT_BADREF, "%s '%s' may not be referenced "
			    "as %s\n", dt_idkind_name(idp->di_kind),
			    idp->di_name, dt_idkind_name(DT_IDENT_ARRAY));
		}

		/*
		 * Now that we've confirmed our left-hand side is a DT_NODE_VAR
		 * of idkind DT_IDENT_ARRAY, we need to splice the [ node from
		 * the parse tree and leave a cooked DT_NODE_VAR in its place
		 * where dn_args for the VAR node is the right-hand 'rp' tree,
		 * as shown in the parse tree diagram below:
		 *
		 *	  /			    /
		 * [ OP2 "[" ]=dnp		[ VAR ]=dnp
		 *	 /	\	  =>	   |
		 *	/	 \		   +- dn_args -> [ ??? ]=rp
		 * [ VAR ]=lp  [ ??? ]=rp
		 *
		 * Since the final dt_node_cook(dnp) can fail using longjmp we
		 * must perform the transformations as a group first by over-
		 * writing 'dnp' to become the VAR node, so that the parse tree
		 * is guaranteed to be in a consistent state if the cook fails.
		 */
		assert(lp->dn_kind == DT_NODE_VAR);
		assert(lp->dn_args == NULL);

		lnp = dnp->dn_link;
		bcopy(lp, dnp, sizeof (dt_node_t));
		dnp->dn_link = lnp;

		dnp->dn_args = rp;
		dnp->dn_list = NULL;

		dt_node_free(lp);
		return (dt_node_cook(dnp, idflags));
	}

	case DT_TOK_XLATE: {
		dt_xlator_t *dxp;

		assert(lp->dn_kind == DT_NODE_TYPE);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);
		dxp = dt_xlator_lookup(dtp, rp, lp, DT_XLATE_FUZZY);

		if (dxp == NULL) {
			xyerror(D_XLATE_NONE,
			    "cannot translate from \"%s\" to \"%s\"\n",
			    dt_node_type_name(rp, n1, sizeof (n1)),
			    dt_node_type_name(lp, n2, sizeof (n2)));
		}

		dnp->dn_ident = dt_xlator_ident(dxp, lp->dn_ctfp, lp->dn_type);
		dt_node_type_assign(dnp, DT_DYN_CTFP(dtp), DT_DYN_TYPE(dtp),
		    B_FALSE);
		dt_node_attr_assign(dnp,
		    dt_attr_min(rp->dn_attr, dnp->dn_ident->di_attr));
		break;
	}

	case DT_TOK_LPAR: {
		ctf_id_t ltype, rtype;
		uint_t lkind, rkind;

		assert(lp->dn_kind == DT_NODE_TYPE);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		ltype = ctf_type_resolve(lp->dn_ctfp, lp->dn_type);
		lkind = ctf_type_kind(lp->dn_ctfp, ltype);

		rtype = ctf_type_resolve(rp->dn_ctfp, rp->dn_type);
		rkind = ctf_type_kind(rp->dn_ctfp, rtype);

		/*
		 * The rules for casting are loosely explained in K&R[A7.5]
		 * and K&R[A6].  Basically, we can cast to the same type or
		 * same base type, between any kind of scalar values, from
		 * arrays to pointers, and we can cast anything to void.
		 * To these rules D adds casts from scalars to strings.
		 */
		if (ctf_type_compat(lp->dn_ctfp, lp->dn_type,
		    rp->dn_ctfp, rp->dn_type))
			/*EMPTY*/;
		else if (dt_node_is_scalar(lp) &&
		    (dt_node_is_scalar(rp) || rkind == CTF_K_FUNCTION))
			/*EMPTY*/;
		else if (dt_node_is_void(lp))
			/*EMPTY*/;
		else if (lkind == CTF_K_POINTER && dt_node_is_pointer(rp))
			/*EMPTY*/;
		else if (dt_node_is_string(lp) && (dt_node_is_scalar(rp) ||
		    dt_node_is_pointer(rp) || dt_node_is_strcompat(rp)))
			/*EMPTY*/;
		else {
			xyerror(D_CAST_INVAL,
			    "invalid cast expression: \"%s\" to \"%s\"\n",
			    dt_node_type_name(rp, n1, sizeof (n1)),
			    dt_node_type_name(lp, n2, sizeof (n2)));
		}

		dt_node_type_propagate(lp, dnp); /* see K&R[A7.5] */
		dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));

		/*
		 * If it's a pointer then should be able to (attempt to)
		 * assign to it.
		 */
		if (lkind == CTF_K_POINTER)
			dnp->dn_flags |= DT_NF_WRITABLE;

		break;
	}

	case DT_TOK_COMMA:
		lp = dnp->dn_left = dt_node_cook(lp, DT_IDFLG_REF);
		rp = dnp->dn_right = dt_node_cook(rp, DT_IDFLG_REF);

		if (dt_node_is_dynamic(lp) || dt_node_is_dynamic(rp)) {
			xyerror(D_OP_DYN, "operator %s operands "
			    "cannot be of dynamic type\n", opstr(op));
		}

		if (dt_node_is_actfunc(lp) || dt_node_is_actfunc(rp)) {
			xyerror(D_OP_ACT, "operator %s operands "
			    "cannot be actions\n", opstr(op));
		}

		dt_node_type_propagate(rp, dnp); /* see K&R[A7.18] */
		dt_node_attr_assign(dnp, dt_attr_min(lp->dn_attr, rp->dn_attr));
		break;

	default:
		xyerror(D_UNKNOWN, "invalid binary op %s\n", opstr(op));
	}

	/*
	 * Complete the conversion of E1[E2] to *((E1)+(E2)) that we started
	 * at the top of our switch() above (see K&R[A7.3.1]).  Since E2 is
	 * parsed as an argument_expression_list by dt_grammar.y, we can
	 * end up with a comma-separated list inside of a non-associative
	 * array reference.  We check for this and report an appropriate error.
	 */
	if (dnp->dn_op == DT_TOK_LBRAC && op == DT_TOK_ADD) {
		dt_node_t *pnp;

		if (rp->dn_list != NULL) {
			xyerror(D_ARR_BADREF,
			    "cannot access %s as an associative array\n",
			    dt_node_name(lp, n1, sizeof (n1)));
		}

		dnp->dn_op = DT_TOK_ADD;
		pnp = dt_node_op1(DT_TOK_DEREF, dnp);

		/*
		 * Cook callbacks are not typically permitted to allocate nodes.
		 * When we do, we must insert them in the middle of an existing
		 * allocation list rather than having them appended to the pcb
		 * list because the sub-expression may be part of a definition.
		 */
		assert(yypcb->pcb_list == pnp);
		yypcb->pcb_list = pnp->dn_link;

		pnp->dn_link = dnp->dn_link;
		dnp->dn_link = pnp;

		return (dt_node_cook(pnp, DT_IDFLG_REF));
	}

	return (dnp);
}

/*ARGSUSED*/
static dt_node_t *
dt_cook_op3(dt_node_t *dnp, uint_t idflags)
{
	dt_node_t *lp, *rp;
	ctf_file_t *ctfp;
	ctf_id_t type;

	dnp->dn_expr = dt_node_cook(dnp->dn_expr, DT_IDFLG_REF);
	lp = dnp->dn_left = dt_node_cook(dnp->dn_left, DT_IDFLG_REF);
	rp = dnp->dn_right = dt_node_cook(dnp->dn_right, DT_IDFLG_REF);

	if (!dt_node_is_scalar(dnp->dn_expr)) {
		xyerror(D_OP_SCALAR,
		    "operator ?: expression must be of scalar type\n");
	}

	if (dt_node_is_dynamic(lp) || dt_node_is_dynamic(rp)) {
		xyerror(D_OP_DYN,
		    "operator ?: operands cannot be of dynamic type\n");
	}

	/*
	 * The rules for type checking for the ternary operator are complex and
	 * are described in the ANSI-C spec (see K&R[A7.16]).  We implement
	 * the various tests in order from least to most expensive.
	 */
	if (ctf_type_compat(lp->dn_ctfp, lp->dn_type,
	    rp->dn_ctfp, rp->dn_type)) {
		ctfp = lp->dn_ctfp;
		type = lp->dn_type;
	} else if (dt_node_is_integer(lp) && dt_node_is_integer(rp)) {
		dt_type_promote(lp, rp, &ctfp, &type);
	} else if (dt_node_is_strcompat(lp) && dt_node_is_strcompat(rp) &&
	    (dt_node_is_string(lp) || dt_node_is_string(rp))) {
		ctfp = DT_STR_CTFP(yypcb->pcb_hdl);
		type = DT_STR_TYPE(yypcb->pcb_hdl);
	} else if (dt_node_is_ptrcompat(lp, rp, &ctfp, &type) == 0) {
		xyerror(D_OP_INCOMPAT,
		    "operator ?: operands must have compatible types\n");
	}

	if (dt_node_is_actfunc(lp) || dt_node_is_actfunc(rp)) {
		xyerror(D_OP_ACT, "action cannot be "
		    "used in a conditional context\n");
	}

	dt_node_type_assign(dnp, ctfp, type, B_FALSE);
	dt_node_attr_assign(dnp, dt_attr_min(dnp->dn_expr->dn_attr,
	    dt_attr_min(lp->dn_attr, rp->dn_attr)));

	return (dnp);
}

static dt_node_t *
dt_cook_statement(dt_node_t *dnp, uint_t idflags)
{
	dnp->dn_expr = dt_node_cook(dnp->dn_expr, idflags);
	dt_node_attr_assign(dnp, dnp->dn_expr->dn_attr);

	return (dnp);
}

/*
 * If dn_aggfun is set, this node is a collapsed aggregation assignment (see
 * the special case code for DT_TOK_ASGN in dt_cook_op2() above), in which
 * case we cook both the tuple and the function call.  If dn_aggfun is NULL,
 * this node is just a reference to the aggregation's type and attributes.
 */
/*ARGSUSED*/
static dt_node_t *
dt_cook_aggregation(dt_node_t *dnp, uint_t idflags)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;

	if (dnp->dn_aggfun != NULL) {
		dnp->dn_aggfun = dt_node_cook(dnp->dn_aggfun, DT_IDFLG_REF);
		dt_node_attr_assign(dnp, dt_ident_cook(dnp,
		    dnp->dn_ident, &dnp->dn_aggtup));
	} else {
		dt_node_type_assign(dnp, DT_DYN_CTFP(dtp), DT_DYN_TYPE(dtp),
		    B_FALSE);
		dt_node_attr_assign(dnp, dnp->dn_ident->di_attr);
	}

	return (dnp);
}

/*
 * Since D permits new variable identifiers to be instantiated in any program
 * expression, we may need to cook a clause's predicate either before or after
 * the action list depending on the program code in question.  Consider:
 *
 * probe-description-list	probe-description-list
 * /x++/			/x == 0/
 * {				{
 *     trace(x);		    trace(x++);
 * }				}
 *
 * In the left-hand example, the predicate uses operator ++ to instantiate 'x'
 * as a variable of type int64_t.  The predicate must be cooked first because
 * otherwise the statement trace(x) refers to an unknown identifier.  In the
 * right-hand example, the action list uses ++ to instantiate 'x'; the action
 * list must be cooked first because otherwise the predicate x == 0 refers to
 * an unknown identifier.  In order to simplify programming, we support both.
 *
 * When cooking a clause, we cook the action statements before the predicate by
 * default, since it seems more common to create or modify identifiers in the
 * action list.  If cooking fails due to an unknown identifier, we attempt to
 * cook the predicate (i.e. do it first) and then go back and cook the actions.
 * If this, too, fails (or if we get an error other than D_IDENT_UNDEF) we give
 * up and report failure back to the user.  There are five possible paths:
 *
 * cook actions = OK, cook predicate = OK -> OK
 * cook actions = OK, cook predicate = ERR -> ERR
 * cook actions = ERR, cook predicate = ERR -> ERR
 * cook actions = ERR, cook predicate = OK, cook actions = OK -> OK
 * cook actions = ERR, cook predicate = OK, cook actions = ERR -> ERR
 *
 * The programmer can still defeat our scheme by creating circular definition
 * dependencies between predicates and actions, as in this example clause:
 *
 * probe-description-list
 * /x++ && y == 0/
 * {
 * 	trace(x + y++);
 * }
 *
 * but it doesn't seem worth the complexity to handle such rare cases.  The
 * user can simply use the D variable declaration syntax to work around them.
 */
static dt_node_t *
dt_cook_clause(dt_node_t *dnp, uint_t idflags)
{
	volatile int err, tries;
	jmp_buf ojb;

	/*
	 * Before assigning dn_ctxattr, temporarily assign the probe attribute
	 * to 'dnp' itself to force an attribute check and minimum violation.
	 */
	dt_node_attr_assign(dnp, yypcb->pcb_pinfo.dtp_attr);
	dnp->dn_ctxattr = yypcb->pcb_pinfo.dtp_attr;

	bcopy(yypcb->pcb_jmpbuf, ojb, sizeof (jmp_buf));
	tries = 0;

	if (dnp->dn_pred != NULL && (err = setjmp(yypcb->pcb_jmpbuf)) != 0) {
		bcopy(ojb, yypcb->pcb_jmpbuf, sizeof (jmp_buf));
		if (tries++ != 0 || err != EDT_COMPILER || (
		    yypcb->pcb_hdl->dt_errtag != dt_errtag(D_IDENT_UNDEF) &&
		    yypcb->pcb_hdl->dt_errtag != dt_errtag(D_VAR_UNDEF)))
			longjmp(yypcb->pcb_jmpbuf, err);
	}

	if (tries == 0) {
		yylabel("action list");

		dt_node_attr_assign(dnp,
		    dt_node_list_cook(&dnp->dn_acts, idflags));

		bcopy(ojb, yypcb->pcb_jmpbuf, sizeof (jmp_buf));
		yylabel(NULL);
	}

	if (dnp->dn_pred != NULL) {
		yylabel("predicate");

		dnp->dn_pred = dt_node_cook(dnp->dn_pred, idflags);
		dt_node_attr_assign(dnp,
		    dt_attr_min(dnp->dn_attr, dnp->dn_pred->dn_attr));

		if (!dt_node_is_scalar(dnp->dn_pred)) {
			xyerror(D_PRED_SCALAR,
			    "predicate result must be of scalar type\n");
		}

		yylabel(NULL);
	}

	if (tries != 0) {
		yylabel("action list");

		dt_node_attr_assign(dnp,
		    dt_node_list_cook(&dnp->dn_acts, idflags));

		yylabel(NULL);
	}

	return (dnp);
}

/*ARGSUSED*/
static dt_node_t *
dt_cook_inline(dt_node_t *dnp, uint_t idflags)
{
	dt_idnode_t *inp = dnp->dn_ident->di_iarg;
	dt_ident_t *rdp;

	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	assert(dnp->dn_ident->di_flags & DT_IDFLG_INLINE);
	assert(inp->din_root->dn_flags & DT_NF_COOKED);

	/*
	 * If we are inlining a translation, verify that the inline declaration
	 * type exactly matches the type that is returned by the translation.
	 * Otherwise just use dt_node_is_argcompat() to check the types.
	 */
	if ((rdp = dt_node_resolve(inp->din_root, DT_IDENT_XLSOU)) != NULL ||
	    (rdp = dt_node_resolve(inp->din_root, DT_IDENT_XLPTR)) != NULL) {

		ctf_file_t *lctfp = dnp->dn_ctfp;
		ctf_id_t ltype = ctf_type_resolve(lctfp, dnp->dn_type);

		dt_xlator_t *dxp = rdp->di_data;
		ctf_file_t *rctfp = dxp->dx_dst_ctfp;
		ctf_id_t rtype = dxp->dx_dst_base;

		if (ctf_type_kind(lctfp, ltype) == CTF_K_POINTER) {
			ltype = ctf_type_reference(lctfp, ltype);
			ltype = ctf_type_resolve(lctfp, ltype);
		}

		if (ctf_type_compat(lctfp, ltype, rctfp, rtype) == 0) {
			dnerror(dnp, D_OP_INCOMPAT,
			    "inline %s definition uses incompatible types: "
			    "\"%s\" = \"%s\"\n", dnp->dn_ident->di_name,
			    dt_type_name(lctfp, ltype, n1, sizeof (n1)),
			    dt_type_name(rctfp, rtype, n2, sizeof (n2)));
		}

	} else if (dt_node_is_argcompat(dnp, inp->din_root) == 0) {
		dnerror(dnp, D_OP_INCOMPAT,
		    "inline %s definition uses incompatible types: "
		    "\"%s\" = \"%s\"\n", dnp->dn_ident->di_name,
		    dt_node_type_name(dnp, n1, sizeof (n1)),
		    dt_node_type_name(inp->din_root, n2, sizeof (n2)));
	}

	return (dnp);
}

static dt_node_t *
dt_cook_member(dt_node_t *dnp, uint_t idflags)
{
	dnp->dn_membexpr = dt_node_cook(dnp->dn_membexpr, idflags);
	dt_node_attr_assign(dnp, dnp->dn_membexpr->dn_attr);
	return (dnp);
}

/*ARGSUSED*/
static dt_node_t *
dt_cook_xlator(dt_node_t *dnp, uint_t idflags)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_xlator_t *dxp = dnp->dn_xlator;
	dt_node_t *mnp;

	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	dtrace_attribute_t attr = _dtrace_maxattr;
	ctf_membinfo_t ctm;

	/*
	 * Before cooking each translator member, we push a reference to the
	 * hash containing translator-local identifiers on to pcb_globals to
	 * temporarily interpose these identifiers in front of other globals.
	 */
	dt_idstack_push(&yypcb->pcb_globals, dxp->dx_locals);

	for (mnp = dnp->dn_members; mnp != NULL; mnp = mnp->dn_list) {
		if (ctf_member_info(dxp->dx_dst_ctfp, dxp->dx_dst_type,
		    mnp->dn_membname, &ctm) == CTF_ERR) {
			xyerror(D_XLATE_MEMB,
			    "translator member %s is not a member of %s\n",
			    mnp->dn_membname, ctf_type_name(dxp->dx_dst_ctfp,
			    dxp->dx_dst_type, n1, sizeof (n1)));
		}

		(void) dt_node_cook(mnp, DT_IDFLG_REF);
		dt_node_type_assign(mnp, dxp->dx_dst_ctfp, ctm.ctm_type,
		    B_FALSE);
		attr = dt_attr_min(attr, mnp->dn_attr);

		if (dt_node_is_argcompat(mnp, mnp->dn_membexpr) == 0) {
			xyerror(D_XLATE_INCOMPAT,
			    "translator member %s definition uses "
			    "incompatible types: \"%s\" = \"%s\"\n",
			    mnp->dn_membname,
			    dt_node_type_name(mnp, n1, sizeof (n1)),
			    dt_node_type_name(mnp->dn_membexpr,
			    n2, sizeof (n2)));
		}
	}

	dt_idstack_pop(&yypcb->pcb_globals, dxp->dx_locals);

	dxp->dx_souid.di_attr = attr;
	dxp->dx_ptrid.di_attr = attr;

	dt_node_type_assign(dnp, DT_DYN_CTFP(dtp), DT_DYN_TYPE(dtp), B_FALSE);
	dt_node_attr_assign(dnp, _dtrace_defattr);

	return (dnp);
}

static void
dt_node_provider_cmp_argv(dt_provider_t *pvp, dt_node_t *pnp, const char *kind,
    uint_t old_argc, dt_node_t *old_argv, uint_t new_argc, dt_node_t *new_argv)
{
	dt_probe_t *prp = pnp->dn_ident->di_data;
	uint_t i;

	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	if (old_argc != new_argc) {
		dnerror(pnp, D_PROV_INCOMPAT,
		    "probe %s:%s %s prototype mismatch:\n"
		    "\t current: %u arg%s\n\tprevious: %u arg%s\n",
		    pvp->pv_desc.dtvd_name, prp->pr_ident->di_name, kind,
		    new_argc, new_argc != 1 ? "s" : "",
		    old_argc, old_argc != 1 ? "s" : "");
	}

	for (i = 0; i < old_argc; i++,
	    old_argv = old_argv->dn_list, new_argv = new_argv->dn_list) {
		if (ctf_type_cmp(old_argv->dn_ctfp, old_argv->dn_type,
		    new_argv->dn_ctfp, new_argv->dn_type) == 0)
			continue;

		dnerror(pnp, D_PROV_INCOMPAT,
		    "probe %s:%s %s prototype argument #%u mismatch:\n"
		    "\t current: %s\n\tprevious: %s\n",
		    pvp->pv_desc.dtvd_name, prp->pr_ident->di_name, kind, i + 1,
		    dt_node_type_name(new_argv, n1, sizeof (n1)),
		    dt_node_type_name(old_argv, n2, sizeof (n2)));
	}
}

/*
 * Compare a new probe declaration with an existing probe definition (either
 * from a previous declaration or cached from the kernel).  If the existing
 * definition and declaration both have an input and output parameter list,
 * compare both lists.  Otherwise compare only the output parameter lists.
 */
static void
dt_node_provider_cmp(dt_provider_t *pvp, dt_node_t *pnp,
    dt_probe_t *old, dt_probe_t *new)
{
	dt_node_provider_cmp_argv(pvp, pnp, "output",
	    old->pr_xargc, old->pr_xargs, new->pr_xargc, new->pr_xargs);

	if (old->pr_nargs != old->pr_xargs && new->pr_nargs != new->pr_xargs) {
		dt_node_provider_cmp_argv(pvp, pnp, "input",
		    old->pr_nargc, old->pr_nargs, new->pr_nargc, new->pr_nargs);
	}

	if (old->pr_nargs == old->pr_xargs && new->pr_nargs != new->pr_xargs) {
		if (pvp->pv_flags & DT_PROVIDER_IMPL) {
			dnerror(pnp, D_PROV_INCOMPAT,
			    "provider interface mismatch: %s\n"
			    "\t current: probe %s:%s has an output prototype\n"
			    "\tprevious: probe %s:%s has no output prototype\n",
			    pvp->pv_desc.dtvd_name, pvp->pv_desc.dtvd_name,
			    new->pr_ident->di_name, pvp->pv_desc.dtvd_name,
			    old->pr_ident->di_name);
		}

		if (old->pr_ident->di_gen == yypcb->pcb_hdl->dt_gen)
			old->pr_ident->di_flags |= DT_IDFLG_ORPHAN;

		dt_idhash_delete(pvp->pv_probes, old->pr_ident);
		dt_probe_declare(pvp, new);
	}
}

static void
dt_cook_probe(dt_node_t *dnp, dt_provider_t *pvp)
{
	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
	dt_probe_t *prp = dnp->dn_ident->di_data;

	dt_xlator_t *dxp;
	uint_t i;

	char n1[DT_TYPE_NAMELEN];
	char n2[DT_TYPE_NAMELEN];

	if (prp->pr_nargs == prp->pr_xargs)
		return;

	for (i = 0; i < prp->pr_xargc; i++) {
		dt_node_t *xnp = prp->pr_xargv[i];
		dt_node_t *nnp = prp->pr_nargv[prp->pr_mapping[i]];

		if ((dxp = dt_xlator_lookup(dtp,
		    nnp, xnp, DT_XLATE_FUZZY)) != NULL) {
			if (dt_provider_xref(dtp, pvp, dxp->dx_id) != 0)
				longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
			continue;
		}

		if (dt_node_is_argcompat(nnp, xnp))
			continue; /* no translator defined and none required */

		dnerror(dnp, D_PROV_PRXLATOR, "translator for %s:%s output "
		    "argument #%u from %s to %s is not defined\n",
		    pvp->pv_desc.dtvd_name, dnp->dn_ident->di_name, i + 1,
		    dt_node_type_name(nnp, n1, sizeof (n1)),
		    dt_node_type_name(xnp, n2, sizeof (n2)));
	}
}

/*ARGSUSED*/
static dt_node_t *
dt_cook_provider(dt_node_t *dnp, uint_t idflags)
{
	dt_provider_t *pvp = dnp->dn_provider;
	dt_node_t *pnp;

	/*
	 * If we're declaring a provider for the first time and it is unknown
	 * to dtrace(7D), insert the probe definitions into the provider's hash.
	 * If we're redeclaring a known provider, verify the interface matches.
	 */
	for (pnp = dnp->dn_probes; pnp != NULL; pnp = pnp->dn_list) {
		const char *probename = pnp->dn_ident->di_name;
		dt_probe_t *prp = dt_probe_lookup(pvp, probename);

		assert(pnp->dn_kind == DT_NODE_PROBE);

		if (prp != NULL && dnp->dn_provred) {
			dt_node_provider_cmp(pvp, pnp,
			    prp, pnp->dn_ident->di_data);
		} else if (prp == NULL && dnp->dn_provred) {
			dnerror(pnp, D_PROV_INCOMPAT,
			    "provider interface mismatch: %s\n"
			    "\t current: probe %s:%s defined\n"
			    "\tprevious: probe %s:%s not defined\n",
			    dnp->dn_provname, dnp->dn_provname,
			    probename, dnp->dn_provname, probename);
		} else if (prp != NULL) {
			dnerror(pnp, D_PROV_PRDUP, "probe redeclared: %s:%s\n",
			    dnp->dn_provname, probename);
		} else
			dt_probe_declare(pvp, pnp->dn_ident->di_data);

		dt_cook_probe(pnp, pvp);
	}

	return (dnp);
}

/*ARGSUSED*/
static dt_node_t *
dt_cook_none(dt_node_t *dnp, uint_t idflags)
{
	return (dnp);
}

static dt_node_t *(*dt_cook_funcs[])(dt_node_t *, uint_t) = {
	dt_cook_none,		/* DT_NODE_FREE */
	dt_cook_none,		/* DT_NODE_INT */
	dt_cook_none,		/* DT_NODE_STRING */
	dt_cook_ident,		/* DT_NODE_IDENT */
	dt_cook_var,		/* DT_NODE_VAR */
	dt_cook_none,		/* DT_NODE_SYM */
	dt_cook_none,		/* DT_NODE_TYPE */
	dt_cook_func,		/* DT_NODE_FUNC */
	dt_cook_op1,		/* DT_NODE_OP1 */
	dt_cook_op2,		/* DT_NODE_OP2 */
	dt_cook_op3,		/* DT_NODE_OP3 */
	dt_cook_statement,	/* DT_NODE_DEXPR */
	dt_cook_statement,	/* DT_NODE_DFUNC */
	dt_cook_aggregation,	/* DT_NODE_AGG */
	dt_cook_none,		/* DT_NODE_PDESC */
	dt_cook_clause,		/* DT_NODE_CLAUSE */
	dt_cook_inline,		/* DT_NODE_INLINE */
	dt_cook_member,		/* DT_NODE_MEMBER */
	dt_cook_xlator,		/* DT_NODE_XLATOR */
	dt_cook_none,		/* DT_NODE_PROBE */
	dt_cook_provider,	/* DT_NODE_PROVIDER */
	dt_cook_none		/* DT_NODE_PROG */
};

/*
 * Recursively cook the parse tree starting at the specified node.  The idflags
 * parameter is used to indicate the type of reference (r/w) and is applied to
 * the resulting identifier if it is a D variable or D aggregation.
 */
dt_node_t *
dt_node_cook(dt_node_t *dnp, uint_t idflags)
{
	int oldlineno = yylineno;

	yylineno = dnp->dn_line;

	dnp = dt_cook_funcs[dnp->dn_kind](dnp, idflags);
	dnp->dn_flags |= DT_NF_COOKED;

	if (dnp->dn_kind == DT_NODE_VAR || dnp->dn_kind == DT_NODE_AGG)
		dnp->dn_ident->di_flags |= idflags;

	yylineno = oldlineno;
	return (dnp);
}

dtrace_attribute_t
dt_node_list_cook(dt_node_t **pnp, uint_t idflags)
{
	dtrace_attribute_t attr = _dtrace_defattr;
	dt_node_t *dnp, *nnp;

	for (dnp = (pnp != NULL ? *pnp : NULL); dnp != NULL; dnp = nnp) {
		nnp = dnp->dn_list;
		dnp = *pnp = dt_node_cook(dnp, idflags);
		attr = dt_attr_min(attr, dnp->dn_attr);
		dnp->dn_list = nnp;
		pnp = &dnp->dn_list;
	}

	return (attr);
}

void
dt_node_list_free(dt_node_t **pnp)
{
	dt_node_t *dnp, *nnp;

	for (dnp = (pnp != NULL ? *pnp : NULL); dnp != NULL; dnp = nnp) {
		nnp = dnp->dn_list;
		dt_node_free(dnp);
	}

	if (pnp != NULL)
		*pnp = NULL;
}

void
dt_node_link_free(dt_node_t **pnp)
{
	dt_node_t *dnp, *nnp;

	for (dnp = (pnp != NULL ? *pnp : NULL); dnp != NULL; dnp = nnp) {
		nnp = dnp->dn_link;
		dt_node_free(dnp);
	}

	for (dnp = (pnp != NULL ? *pnp : NULL); dnp != NULL; dnp = nnp) {
		nnp = dnp->dn_link;
		free(dnp);
	}

	if (pnp != NULL)
		*pnp = NULL;
}

dt_node_t *
dt_node_link(dt_node_t *lp, dt_node_t *rp)
{
	dt_node_t *dnp;

	if (lp == NULL)
		return (rp);
	else if (rp == NULL)
		return (lp);

	for (dnp = lp; dnp->dn_list != NULL; dnp = dnp->dn_list)
		continue;

	dnp->dn_list = rp;
	return (lp);
}

/*
 * Compute the DOF dtrace_diftype_t representation of a node's type.  This is
 * called from a variety of places in the library so it cannot assume yypcb
 * is valid: any references to handle-specific data must be made through 'dtp'.
 */
void
dt_node_diftype(dtrace_hdl_t *dtp, const dt_node_t *dnp, dtrace_diftype_t *tp)
{
	if (dnp->dn_ctfp == DT_STR_CTFP(dtp) &&
	    dnp->dn_type == DT_STR_TYPE(dtp)) {
		tp->dtdt_kind = DIF_TYPE_STRING;
		tp->dtdt_ckind = CTF_K_UNKNOWN;
	} else {
		tp->dtdt_kind = DIF_TYPE_CTF;
		tp->dtdt_ckind = ctf_type_kind(dnp->dn_ctfp,
		    ctf_type_resolve(dnp->dn_ctfp, dnp->dn_type));
	}

	tp->dtdt_flags = (dnp->dn_flags & DT_NF_REF) ?
	    (dnp->dn_flags & DT_NF_USERLAND) ? DIF_TF_BYUREF :
	    DIF_TF_BYREF : 0;
	tp->dtdt_pad = 0;
	tp->dtdt_size = ctf_type_size(dnp->dn_ctfp, dnp->dn_type);
}

void
dt_node_printr(dt_node_t *dnp, FILE *fp, int depth)
{
	char n[DT_TYPE_NAMELEN], buf[BUFSIZ], a[8];
	const dtrace_syminfo_t *dts;
	const dt_idnode_t *inp;
	dt_node_t *arg;

	(void) fprintf(fp, "%*s", depth * 2, "");
	(void) dt_attr_str(dnp->dn_attr, a, sizeof (a));

	if (dnp->dn_ctfp != NULL && dnp->dn_type != CTF_ERR &&
	    ctf_type_name(dnp->dn_ctfp, dnp->dn_type, n, sizeof (n)) != NULL) {
		(void) snprintf(buf, BUFSIZ, "type=<%s> attr=%s flags=", n, a);
	} else {
		(void) snprintf(buf, BUFSIZ, "type=<%ld> attr=%s flags=",
		    dnp->dn_type, a);
	}

	if (dnp->dn_flags != 0) {
		n[0] = '\0';
		if (dnp->dn_flags & DT_NF_SIGNED)
			(void) strcat(n, ",SIGN");
		if (dnp->dn_flags & DT_NF_COOKED)
			(void) strcat(n, ",COOK");
		if (dnp->dn_flags & DT_NF_REF)
			(void) strcat(n, ",REF");
		if (dnp->dn_flags & DT_NF_LVALUE)
			(void) strcat(n, ",LVAL");
		if (dnp->dn_flags & DT_NF_WRITABLE)
			(void) strcat(n, ",WRITE");
		if (dnp->dn_flags & DT_NF_BITFIELD)
			(void) strcat(n, ",BITF");
		if (dnp->dn_flags & DT_NF_USERLAND)
			(void) strcat(n, ",USER");
		(void) strcat(buf, n + 1);
	} else
		(void) strcat(buf, "0");

	switch (dnp->dn_kind) {
	case DT_NODE_FREE:
		(void) fprintf(fp, "FREE <node %p>\n", (void *)dnp);
		break;

	case DT_NODE_INT:
		(void) fprintf(fp, "INT 0x%llx (%s)\n",
		    (u_longlong_t)dnp->dn_value, buf);
		break;

	case DT_NODE_STRING:
		(void) fprintf(fp, "STRING \"%s\" (%s)\n", dnp->dn_string, buf);
		break;

	case DT_NODE_IDENT:
		(void) fprintf(fp, "IDENT %s (%s)\n", dnp->dn_string, buf);
		break;

	case DT_NODE_VAR:
		(void) fprintf(fp, "VARIABLE %s%s (%s)\n",
		    (dnp->dn_ident->di_flags & DT_IDFLG_LOCAL) ? "this->" :
		    (dnp->dn_ident->di_flags & DT_IDFLG_TLS) ? "self->" : "",
		    dnp->dn_ident->di_name, buf);

		if (dnp->dn_args != NULL)
			(void) fprintf(fp, "%*s[\n", depth * 2, "");

		for (arg = dnp->dn_args; arg != NULL; arg = arg->dn_list) {
			dt_node_printr(arg, fp, depth + 1);
			if (arg->dn_list != NULL)
				(void) fprintf(fp, "%*s,\n", depth * 2, "");
		}

		if (dnp->dn_args != NULL)
			(void) fprintf(fp, "%*s]\n", depth * 2, "");
		break;

	case DT_NODE_SYM:
		dts = dnp->dn_ident->di_data;
		(void) fprintf(fp, "SYMBOL %s`%s (%s)\n",
		    dts->dts_object, dts->dts_name, buf);
		break;

	case DT_NODE_TYPE:
		if (dnp->dn_string != NULL) {
			(void) fprintf(fp, "TYPE (%s) %s\n",
			    buf, dnp->dn_string);
		} else
			(void) fprintf(fp, "TYPE (%s)\n", buf);
		break;

	case DT_NODE_FUNC:
		(void) fprintf(fp, "FUNC %s (%s)\n",
		    dnp->dn_ident->di_name, buf);

		for (arg = dnp->dn_args; arg != NULL; arg = arg->dn_list) {
			dt_node_printr(arg, fp, depth + 1);
			if (arg->dn_list != NULL)
				(void) fprintf(fp, "%*s,\n", depth * 2, "");
		}
		break;

	case DT_NODE_OP1:
		(void) fprintf(fp, "OP1 %s (%s)\n", opstr(dnp->dn_op), buf);
		dt_node_printr(dnp->dn_child, fp, depth + 1);
		break;

	case DT_NODE_OP2:
		(void) fprintf(fp, "OP2 %s (%s)\n", opstr(dnp->dn_op), buf);
		dt_node_printr(dnp->dn_left, fp, depth + 1);
		dt_node_printr(dnp->dn_right, fp, depth + 1);
		break;

	case DT_NODE_OP3:
		(void) fprintf(fp, "OP3 (%s)\n", buf);
		dt_node_printr(dnp->dn_expr, fp, depth + 1);
		(void) fprintf(fp, "%*s?\n", depth * 2, "");
		dt_node_printr(dnp->dn_left, fp, depth + 1);
		(void) fprintf(fp, "%*s:\n", depth * 2, "");
		dt_node_printr(dnp->dn_right, fp, depth + 1);
		break;

	case DT_NODE_DEXPR:
	case DT_NODE_DFUNC:
		(void) fprintf(fp, "D EXPRESSION attr=%s\n", a);
		dt_node_printr(dnp->dn_expr, fp, depth + 1);
		break;

	case DT_NODE_AGG:
		(void) fprintf(fp, "AGGREGATE @%s attr=%s [\n",
		    dnp->dn_ident->di_name, a);

		for (arg = dnp->dn_aggtup; arg != NULL; arg = arg->dn_list) {
			dt_node_printr(arg, fp, depth + 1);
			if (arg->dn_list != NULL)
				(void) fprintf(fp, "%*s,\n", depth * 2, "");
		}

		if (dnp->dn_aggfun) {
			(void) fprintf(fp, "%*s] = ", depth * 2, "");
			dt_node_printr(dnp->dn_aggfun, fp, depth + 1);
		} else
			(void) fprintf(fp, "%*s]\n", depth * 2, "");

		if (dnp->dn_aggfun)
			(void) fprintf(fp, "%*s)\n", depth * 2, "");
		break;

	case DT_NODE_PDESC:
		(void) fprintf(fp, "PDESC %s:%s:%s:%s [%u]\n",
		    dnp->dn_desc->dtpd_provider, dnp->dn_desc->dtpd_mod,
		    dnp->dn_desc->dtpd_func, dnp->dn_desc->dtpd_name,
		    dnp->dn_desc->dtpd_id);
		break;

	case DT_NODE_CLAUSE:
		(void) fprintf(fp, "CLAUSE attr=%s\n", a);

		for (arg = dnp->dn_pdescs; arg != NULL; arg = arg->dn_list)
			dt_node_printr(arg, fp, depth + 1);

		(void) fprintf(fp, "%*sCTXATTR %s\n", depth * 2, "",
		    dt_attr_str(dnp->dn_ctxattr, a, sizeof (a)));

		if (dnp->dn_pred != NULL) {
			(void) fprintf(fp, "%*sPREDICATE /\n", depth * 2, "");
			dt_node_printr(dnp->dn_pred, fp, depth + 1);
			(void) fprintf(fp, "%*s/\n", depth * 2, "");
		}

		for (arg = dnp->dn_acts; arg != NULL; arg = arg->dn_list)
			dt_node_printr(arg, fp, depth + 1);
		break;

	case DT_NODE_INLINE:
		inp = dnp->dn_ident->di_iarg;

		(void) fprintf(fp, "INLINE %s (%s)\n",
		    dnp->dn_ident->di_name, buf);
		dt_node_printr(inp->din_root, fp, depth + 1);
		break;

	case DT_NODE_MEMBER:
		(void) fprintf(fp, "MEMBER %s (%s)\n", dnp->dn_membname, buf);
		if (dnp->dn_membexpr)
			dt_node_printr(dnp->dn_membexpr, fp, depth + 1);
		break;

	case DT_NODE_XLATOR:
		(void) fprintf(fp, "XLATOR (%s)", buf);

		if (ctf_type_name(dnp->dn_xlator->dx_src_ctfp,
		    dnp->dn_xlator->dx_src_type, n, sizeof (n)) != NULL)
			(void) fprintf(fp, " from <%s>", n);

		if (ctf_type_name(dnp->dn_xlator->dx_dst_ctfp,
		    dnp->dn_xlator->dx_dst_type, n, sizeof (n)) != NULL)
			(void) fprintf(fp, " to <%s>", n);

		(void) fprintf(fp, "\n");

		for (arg = dnp->dn_members; arg != NULL; arg = arg->dn_list)
			dt_node_printr(arg, fp, depth + 1);
		break;

	case DT_NODE_PROBE:
		(void) fprintf(fp, "PROBE %s\n", dnp->dn_ident->di_name);
		break;

	case DT_NODE_PROVIDER:
		(void) fprintf(fp, "PROVIDER %s (%s)\n",
		    dnp->dn_provname, dnp->dn_provred ? "redecl" : "decl");
		for (arg = dnp->dn_probes; arg != NULL; arg = arg->dn_list)
			dt_node_printr(arg, fp, depth + 1);
		break;

	case DT_NODE_PROG:
		(void) fprintf(fp, "PROGRAM attr=%s\n", a);
		for (arg = dnp->dn_list; arg != NULL; arg = arg->dn_list)
			dt_node_printr(arg, fp, depth + 1);
		break;

	default:
		(void) fprintf(fp, "<bad node %p, kind %d>\n",
		    (void *)dnp, dnp->dn_kind);
	}
}

int
dt_node_root(dt_node_t *dnp)
{
	yypcb->pcb_root = dnp;
	return (0);
}

/*PRINTFLIKE3*/
void
dnerror(const dt_node_t *dnp, dt_errtag_t tag, const char *format, ...)
{
	int oldlineno = yylineno;
	va_list ap;

	yylineno = dnp->dn_line;

	va_start(ap, format);
	xyvwarn(tag, format, ap);
	va_end(ap);

	yylineno = oldlineno;
	longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
}

/*PRINTFLIKE3*/
void
dnwarn(const dt_node_t *dnp, dt_errtag_t tag, const char *format, ...)
{
	int oldlineno = yylineno;
	va_list ap;

	yylineno = dnp->dn_line;

	va_start(ap, format);
	xyvwarn(tag, format, ap);
	va_end(ap);

	yylineno = oldlineno;
}

/*PRINTFLIKE2*/
void
xyerror(dt_errtag_t tag, const char *format, ...)
{
	va_list ap;

	va_start(ap, format);
	xyvwarn(tag, format, ap);
	va_end(ap);

	longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
}

/*PRINTFLIKE2*/
void
xywarn(dt_errtag_t tag, const char *format, ...)
{
	va_list ap;

	va_start(ap, format);
	xyvwarn(tag, format, ap);
	va_end(ap);
}

void
xyvwarn(dt_errtag_t tag, const char *format, va_list ap)
{
	if (yypcb == NULL)
		return; /* compiler is not currently active: act as a no-op */

	dt_set_errmsg(yypcb->pcb_hdl, dt_errtag(tag), yypcb->pcb_region,
	    yypcb->pcb_filetag, yypcb->pcb_fileptr ? yylineno : 0, format, ap);
}

/*PRINTFLIKE1*/
void
yyerror(const char *format, ...)
{
	va_list ap;

	va_start(ap, format);
	yyvwarn(format, ap);
	va_end(ap);

	longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
}

/*PRINTFLIKE1*/
void
yywarn(const char *format, ...)
{
	va_list ap;

	va_start(ap, format);
	yyvwarn(format, ap);
	va_end(ap);
}

void
yyvwarn(const char *format, va_list ap)
{
	if (yypcb == NULL)
		return; /* compiler is not currently active: act as a no-op */

	dt_set_errmsg(yypcb->pcb_hdl, dt_errtag(D_SYNTAX), yypcb->pcb_region,
	    yypcb->pcb_filetag, yypcb->pcb_fileptr ? yylineno : 0, format, ap);

	if (strchr(format, '\n') == NULL) {
		dtrace_hdl_t *dtp = yypcb->pcb_hdl;
		size_t len = strlen(dtp->dt_errmsg);
		char *p, *s = dtp->dt_errmsg + len;
		size_t n = sizeof (dtp->dt_errmsg) - len;

		if (yytext[0] == '\0')
			(void) snprintf(s, n, " near end of input");
		else if (yytext[0] == '\n')
			(void) snprintf(s, n, " near end of line");
		else {
			if ((p = strchr(yytext, '\n')) != NULL)
				*p = '\0'; /* crop at newline */
			(void) snprintf(s, n, " near \"%s\"", yytext);
		}
	}
}

void
yylabel(const char *label)
{
	dt_dprintf("set label to <%s>\n", label ? label : "NULL");
	yypcb->pcb_region = label;
}

int
yywrap(void)
{
	return (1); /* indicate that lex should return a zero token for EOF */
}