aboutsummaryrefslogblamecommitdiffstats
path: root/lib/kernel/test/global_SUITE.erl
blob: 1e7bcf17667f9849953bd9610c2965849a0d78bc (plain) (tree)
1
2
3
4
5
6
7
8
9
10
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
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
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

                   
  
                                                        
  




                                                                      
  



                                                                         
  



                      

                        
                                                                  
                                           




















                                                                            
            





                                                      
                                                    







                                                               
 
                                         
 
         













                                                                     


              


                                                            






























                                                                                   







                                                                              





                                                                               

                                                             
                                  
                                           










                                                                             
 



































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                                                      

































































































































































































































                                                                              
                                            








































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                                        
             










































































































































































































































































































































































































































































































































                                                                                
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2011. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(global_SUITE).

%-define(line_trace, 1).

-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
	 init_per_suite/1, end_per_suite/1,
	 names/1, names_hidden/1, locks/1, locks_hidden/1,
	 bad_input/1, names_and_locks/1, lock_die/1, name_die/1,
	 basic_partition/1, basic_name_partition/1,
	 advanced_partition/1, stress_partition/1,
	 ring/1, simple_ring/1, line/1, simple_line/1,
	 global_lost_nodes/1, otp_1849/1,
	 otp_3162/1, otp_5640/1, otp_5737/1,
         otp_6931/1, 
         simple_disconnect/1, 
         simple_resolve/1, simple_resolve2/1, simple_resolve3/1,
         leftover_name/1, re_register_name/1, name_exit/1, external_nodes/1,
         many_nodes/1, sync_0/1,
	 global_groups_change/1,
	 register_1/1,
	 both_known_1/1,
         lost_unregister/1,
	 mass_death/1,
	 garbage_messages/1]).

-export([global_load/3, lock_global/2, lock_global2/2]).

-export([]).
-export([mass_spawn/1]).

-export([start_tracer/0, stop_tracer/0, get_trace/0]).

-compile(export_all).

-include_lib("test_server/include/test_server.hrl").

-define(NODES, [node()|nodes()]).

-define(UNTIL(Seq), loop_until_true(fun() -> Seq end, Config)).

%% The resource used by the global module.
-define(GLOBAL_LOCK, global).


suite() -> [{ct_hooks,[ts_install_cth]}].

all() -> 
    case init:get_argument(ring_line) of
	{ok, _} -> [ring_line];
	_ ->
	    [names, names_hidden, locks, locks_hidden, bad_input,
	     names_and_locks, lock_die, name_die, basic_partition,
	     advanced_partition, basic_name_partition,
	     stress_partition, simple_ring, simple_line, ring, line,
	     global_lost_nodes, otp_1849, otp_3162, otp_5640,
	     otp_5737, otp_6931, simple_disconnect, simple_resolve,
	     simple_resolve2, simple_resolve3, leftover_name,
	     re_register_name, name_exit, external_nodes, many_nodes,
	     sync_0, global_groups_change, register_1, both_known_1,
	     lost_unregister, mass_death, garbage_messages]
    end.

groups() -> 
    [{ttt, [],
      [names, names_hidden, locks, locks_hidden, bad_input,
       names_and_locks, lock_die, name_die, basic_partition,
       ring]}].

init_per_group(_GroupName, Config) ->
	Config.

end_per_group(_GroupName, Config) ->
	Config.

init_per_suite(Config) ->

    %% Copied from test_server_ctrl ln 647, we have to do this here as
    %% the test_server only does this when run without common_test
    global:sync(),
    case global:whereis_name(test_server) of
	undefined ->
	    io:format(user, "Registering test_server globally!~n",[]),
	    global:register_name(test_server, whereis(test_server_ctrl));
	Pid ->
	    case node() of
		N when N == node(Pid) ->
		    io:format(user, "Warning: test_server already running!\n", []),
		    global:re_register_name(test_server,self());
		_ ->
		    ok
	    end
    end,
    Config.

end_per_suite(_Config) ->
    global:unregister_name(test_server),
    ok.


-define(TESTCASE, testcase_name).
-define(testcase, ?config(?TESTCASE, Config)).
-define(nodes_tag, '$global_nodes').
-define(registered, ?config(registered, Config)).

init_per_testcase(Case, Config) when is_atom(Case), is_list(Config) ->
    ok = gen_server:call(global_name_server, high_level_trace_start,infinity),

    %% Make sure that everything is dead and done. Otherwise there are problems
    %% on platforms on which it takes a long time to shut down a node.
    stop_nodes(nodes()),
    timer:sleep(1000),

    [{?TESTCASE, Case}, {registered, registered()} | Config].

end_per_testcase(_Case, Config) ->
    ct:log("Calling end_per_testcase!",[]),
    ?line write_high_level_trace(Config),
    ?line _ = 
        gen_server:call(global_name_server, high_level_trace_stop, infinity),
    ?line[global:unregister_name(N) || N <- global:registered_names(), 
                                       N =/= test_server],
    ?line InitRegistered = ?registered,
    ?line Registered = registered(),
    ?line [io:format("~s local names: ~p~n", [What, N]) ||
              {What, N} <- [{"Added", Registered -- InitRegistered},
                            {"Removed", InitRegistered -- Registered}],
              N =/= []],

    ok.

%%% General comments:
%%% One source of problems with failing tests can be that the nodes from the
%%% previous test haven't died yet.
%%% So, when stressing a particular test by running it in a loop, it may
%%% fail already when starting the help nodes, even if the nodes have been
%%% monitored and the nodedowns picked up at the previous round. Waiting
%%% a few seconds between rounds seems to solve the problem. Possibly the
%%% timeout of 7 seconds for connections can also be a problem. This problem
%%% is the same with old (vsn 3) and new global (vsn 4).


%%% Test that register_name/2 registers the name on all nodes, even if
%%% a new node appears in the middle of the operation (OTP-3552).
%%%
%%% Test scenario: process p2 is spawned, locks global, starts a slave node,
%%% and tells the parent to do register_name. Then p2 sleeps for five seconds
%%% and releases the lock. Now the name should exist on both our own node
%%% and on the slave node (we wait until that is true; it seems that we
%%% can do rpc calls to another node before the connection is really up).
register_1(suite) -> [];
register_1(Config) when is_list(Config) ->
    Timeout = 15,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),
    P = spawn_link(?MODULE, lock_global, [self(), Config]),
    receive
	{P, ok} ->
	    io:format("p1: received ok~n"),
	    ok
    end,
    P ! step2,
    io:format("p1: sent step2~n"),
    ?line yes = global:register_name(foo, self()),
    io:format("p1: registered~n"),
    P ! step3,
    receive
	{P, I, I2} ->
	    ok
    end,
    if
	I =:= I2 ->
	    ok;
	true ->
	    test_server:fail({notsync, I, I2})
    end,
    ?line _ = global:unregister_name(foo),
    write_high_level_trace(Config),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

lock_global(Parent, Config) ->
    Id = {global, self()},
    io:format("p2: setting lock~n"),
    global:set_lock(Id, [node()]),
    Parent ! {self(), ok},
    io:format("p2: sent ok~n"),
    receive
	step2 ->
	    io:format("p2: received step2"),
	    ok
    end,
    io:format("p2: starting slave~n"),
    {ok, Host} = inet:gethostname(),
    {ok, N1} = slave:start(Host, node1),
    io:format("p2: deleting lock~n"),
    global:del_lock(Id, [node()]),
    io:format("p2: deleted lock~n"),
    receive
	step3 ->
	    ok
    end,
    io:format("p2: received step3~n"),
    I = global:whereis_name(foo),
    io:format("p2: name ~p~n", [I]),
    ?line ?UNTIL(I =:= rpc:call(N1, global, whereis_name, [foo])),
    I2 = I,
    slave:stop(N1),
    io:format("p2: name2 ~p~n", [I2]),
    Parent ! {self(), I, I2},
    ok.

%%% Test for the OTP-3576 problem: if nodes 1 and 2 are separated and
%%% brought together again, while keeping connection with 3, it could
%%% happen that if someone temporarily held the 'global' lock,
%%% 'try_again_locker' would be called, and this time cause both 1 and 2
%%% to obtain a lock for 'global' on node 3, which would keep the
%%% name registry from ever becoming consistent again.
both_known_1(suite) -> [];
both_known_1(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),

    ?line OrigNames = global:registered_names(),

    ?line [Cp1, Cp2, Cp3] = start_nodes([cp1, cp2, cp3], slave, Config),

    ?line wait_for_ready_net(Config),

    ?line rpc_disconnect_node(Cp1, Cp2, Config),

    ?line {_Pid1, yes} = rpc:call(Cp1, ?MODULE, start_proc, [p1]),
    ?line {_Pid2, yes} = rpc:call(Cp2, ?MODULE, start_proc, [p2]),

    ?line Names10 = rpc:call(Cp1, global, registered_names, []),
    ?line Names20 = rpc:call(Cp2, global, registered_names, []),
    ?line Names30 = rpc:call(Cp3, global, registered_names, []),

    Names1 = Names10 -- OrigNames,
    Names2 = Names20 -- OrigNames,
    Names3 = Names30 -- OrigNames,

    ?line [p1] = lists:sort(Names1),
    ?line [p2] = lists:sort(Names2),
    ?line [p1, p2] = lists:sort(Names3),

    ?line Locker = spawn(Cp3, ?MODULE, lock_global2, [{global, l3},
					     self()]),

    ?line receive
	      {locked, S} ->
		  true = S
	  end,

    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp2]),

    %% Bring cp1 and cp2 together, while someone has locked global.
    %% They will now loop in 'loop_locker'.

    ?line Names10_2 = rpc:call(Cp1, global, registered_names, []),
    ?line Names20_2 = rpc:call(Cp2, global, registered_names, []),
    ?line Names30_2 = rpc:call(Cp3, global, registered_names, []),

    Names1_2 = Names10_2 -- OrigNames,
    Names2_2 = Names20_2 -- OrigNames,
    Names3_2 = Names30_2 -- OrigNames,

    ?line [p1] = lists:sort(Names1_2),
    ?line [p2] = lists:sort(Names2_2),
    ?line [p1, p2] = lists:sort(Names3_2),

    %% Let go of the lock, and expect the lockers to resolve the name
    %% registry.
    Locker ! {ok, self()},

    ?line 
    ?UNTIL(begin
	       ?line Names10_3 = rpc:call(Cp1, global, registered_names, []),
	       ?line Names20_3 = rpc:call(Cp2, global, registered_names, []),
	       ?line Names30_3 = rpc:call(Cp3, global, registered_names, []),
	       
	       Names1_3 = Names10_3 -- OrigNames,
	       Names2_3 = Names20_3 -- OrigNames,
	       Names3_3 = Names30_3 -- OrigNames,
	       
	       N1 = lists:sort(Names1_3),
	       N2 = lists:sort(Names2_3),
	       N3 = lists:sort(Names3_3),
	       (N1 =:= [p1, p2]) and (N2 =:= [p1, p2]) and (N3 =:= [p1, p2])
	   end),

    write_high_level_trace(Config),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

lost_unregister(suite) -> [];
lost_unregister(doc) ->
    ["OTP-6428. An unregistered name reappears."];
lost_unregister(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),

    ?line {ok, B} = start_node(b, Config),
    ?line {ok, C} = start_node(c, Config),
    Nodes = [node(), B, C],

    ?line wait_for_ready_net(Config),

    % start a proc and register it
    ?line {Pid, yes} = start_proc(test),

    ?line ?UNTIL(Pid =:= global:whereis_name(test)),
    ?line check_everywhere(Nodes, test, Config),

    ?line rpc_disconnect_node(B, C, Config),
    ?line check_everywhere(Nodes, test, Config),
    ?line _ = rpc:call(B, global, unregister_name, [test]),
    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
    ?line Pid = rpc:call(C, global, whereis_name, [test]),
    ?line check_everywhere(Nodes--[C], test, Config),
    ?line pong = rpc:call(B, net_adm, ping, [C]),

    %% Now the name has reappeared on node B.
    ?line ?UNTIL(Pid =:= global:whereis_name(test)),
    ?line check_everywhere(Nodes, test, Config),

    exit_p(Pid),

    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
    ?line check_everywhere(Nodes, test, Config),

    write_high_level_trace(Config),
    stop_node(B),
    stop_node(C),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

-define(UNTIL_LOOP, 300).

-define(end_tag, 'end at').

init_high_level_trace(Time) ->
    Mul = try 
              test_server:timetrap_scale_factor()
              catch _:_ -> 1 
          end,
    put(?end_tag, msec() + Time * Mul * 1000),
    %% Assures that started nodes start the high level trace automatically.
    ok = gen_server:call(global_name_server, high_level_trace_start,infinity),
    os:putenv("GLOBAL_HIGH_LEVEL_TRACE", "TRUE"),
    put(?nodes_tag, []).

loop_until_true(Fun, Config) ->
    case Fun() of
	true ->
	    true;
	_ ->
            case get(?end_tag) of
                undefined ->
                    timer:sleep(?UNTIL_LOOP),
                    loop_until_true(Fun, Config);
                EndAt ->
                    Left = EndAt - msec(),
                    case Left < 6000 of
                        true -> 
                            write_high_level_trace(Config),
                            Ref = make_ref(),
                            receive Ref -> ok end;
                        false ->
                            timer:sleep(?UNTIL_LOOP),
                            loop_until_true(Fun, Config)
                    end
            end
    end.

write_high_level_trace(Config) ->
    case erase(?nodes_tag) of
        undefined -> 
            ok;
        Nodes0 -> 
            Nodes = lists:usort([node() | Nodes0]),            
            write_high_level_trace(Nodes, Config)
    end.

write_high_level_trace(Nodes, Config) ->
    When = now(),
    %% 'info' returns more than the trace, which is nice.
    Data = [{Node, {info, rpc:call(Node, global, info, [])}} ||
               Node <- Nodes],
    Dir = ?config(priv_dir, Config),
    DataFile = filename:join([Dir, lists:concat(["global_", ?testcase])]),
    file:write_file(DataFile, term_to_binary({high_level_trace, When, Data})).

lock_global2(Id, Parent) ->
    S = global:set_lock(Id),
    Parent ! {locked, S},
    receive
	{ok, Parent} ->
	    ok
    end.

%%-----------------------------------------------------------------
%% Test suite for global names and locks.
%% Should be started in a CC view with:
%% erl -sname XXX -rsh ctrsh where XX not in [cp1, cp2, cp3]
%%-----------------------------------------------------------------

%cp1 - cp3 are started, and the name 'test' registered for a process on
%test_server. Then it is checked that the name is registered on all
%nodes, using whereis_name and safe_whereis_name. Check that the same
%name can't be registered with another value. Exit the registered
%process and check that the name disappears. Register a new process
%(Pid2) under the name 'test'. Let another new process (Pid3)
%reregister itself under the same name. Test global:send/2. Test
%unregister. Kill Pid3. Start a process (Pid6) on cp3,
%register it as 'test', stop cp1 - cp3 and check that 'test' disappeared.
%Kill Pid2 and check that 'test' isn't registered.

names(suite) -> [];
names(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),
    ?line OrigNames = global:registered_names(),

    ?line {ok, Cp1} = start_node(cp1, Config),
    ?line {ok, Cp2} = start_node(cp2, Config),
    ?line {ok, Cp3} = start_node(cp3, Config),

    ?line wait_for_ready_net(Config),

    % start a proc and register it
    ?line {Pid, yes} = start_proc(test),

    % test that it is registered at all nodes
    ?line 
    ?UNTIL(begin 
            (Pid =:= global:safe_whereis_name(test)) and
            (Pid =:= rpc:call(Cp1, global, safe_whereis_name, [test])) and
            (Pid =:= rpc:call(Cp2, global, safe_whereis_name, [test])) and
            (Pid =:= rpc:call(Cp3, global, safe_whereis_name, [test])) and
            (Pid =:= global:whereis_name(test)) and
            (Pid =:= rpc:call(Cp1, global, whereis_name, [test])) and
            (Pid =:= rpc:call(Cp2, global, whereis_name, [test])) and
            (Pid =:= rpc:call(Cp3, global, whereis_name, [test])) and
            ([test] =:= global:registered_names() -- OrigNames)
           end),
    
    % try to register the same name
    ?line no = global:register_name(test, self()),
    ?line no = rpc:call(Cp1, global, register_name, [test, self()]),
    
    % let process exit, check that it is unregistered automatically
    exit_p(Pid),

    ?line
    ?UNTIL((undefined =:= global:whereis_name(test)) and
           (undefined =:= rpc:call(Cp1, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp2, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp3, global, whereis_name, [test]))),
    
    % test re_register
    ?line {Pid2, yes} = start_proc(test),
    ?line ?UNTIL(Pid2 =:= rpc:call(Cp3, global, whereis_name, [test])),
    Pid3 = rpc:call(Cp3, ?MODULE, start_proc2, [test]),
    ?line ?UNTIL(Pid3 =:= rpc:call(Cp3, global, whereis_name, [test])),
    Pid3 = global:whereis_name(test),

    % test sending
    global:send(test, {ping, self()}),
    receive
	{pong, Cp3} -> ok
    after
	2000 -> test_server:fail(timeout1)
    end,

    rpc:call(Cp1, global, send, [test, {ping, self()}]),
    receive
	{pong, Cp3} -> ok
    after
	2000 -> test_server:fail(timeout2)
    end,

    ?line _ = global:unregister_name(test),
    ?line
    ?UNTIL((undefined =:= global:whereis_name(test)) and
           (undefined =:= rpc:call(Cp1, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp2, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp3, global, whereis_name, [test]))),

    exit_p(Pid3),

    ?line ?UNTIL(undefined =:= global:whereis_name(test)),

    % register a proc
    ?line {_Pid6, yes} = rpc:call(Cp3, ?MODULE, start_proc, [test]),

    write_high_level_trace(Config),
    % stop the nodes, and make sure names are released.
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),

    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
    exit_p(Pid2),

    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

names_hidden(suite) -> [];
names_hidden(doc) ->
    ["Tests that names on a hidden node doesn't interfere with names on "
     "visible nodes."];
names_hidden(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),
    ?line OrigNodes = nodes(),

    ?line {ok, Cp1} = start_node(cp1, Config),
    ?line {ok, Cp2} = start_node(cp2, Config),
    ?line {ok, Cp3} = start_hidden_node(cp3, Config),
    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp3]),
    ?line pong = rpc:call(Cp3, net_adm, ping, [Cp2]),
    ?line pong = rpc:call(Cp3, net_adm, ping, [node()]),

    ?line [] = [Cp1, Cp2 | OrigNodes] -- nodes(),

    % start a proc on hidden node and register it
    ?line {HPid, yes} = rpc:call(Cp3, ?MODULE, start_proc, [test]),
    ?line Cp3 = node(HPid),

    % Check that it didn't get registered on visible nodes
    ?line
    ?UNTIL((undefined =:= global:safe_whereis_name(test)) and
           (undefined =:= rpc:call(Cp1, global, safe_whereis_name, [test])) and
           (undefined =:= rpc:call(Cp2, global, safe_whereis_name, [test])) and
           (undefined =:= global:whereis_name(test)) and
           (undefined =:= rpc:call(Cp1, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp2, global, whereis_name, [test]))),

    % start a proc on visible node and register it
    ?line {Pid, yes} = start_proc(test),
    ?line true = (Pid =/= HPid),

    % test that it is registered at all nodes
    ?line
    ?UNTIL((Pid =:= global:safe_whereis_name(test)) and
           (Pid =:= rpc:call(Cp1, global, safe_whereis_name, [test])) and
           (Pid =:= rpc:call(Cp2, global, safe_whereis_name, [test])) and
           (HPid =:= rpc:call(Cp3, global, safe_whereis_name, [test])) and
           (Pid =:= global:whereis_name(test)) and
           (Pid =:= rpc:call(Cp1, global, whereis_name, [test])) and
           (Pid =:= rpc:call(Cp2, global, whereis_name, [test])) and
           (HPid =:= rpc:call(Cp3, global, whereis_name, [test])) and
           ([test] =:= global:registered_names() -- OrigNames)),
    
    % try to register the same name
    ?line no = global:register_name(test, self()),
    ?line no = rpc:call(Cp1, global, register_name, [test, self()]),
    
    % let process exit, check that it is unregistered automatically
    exit_p(Pid),

    ?line 
    ?UNTIL((undefined =:= global:whereis_name(test)) and
           (undefined =:= rpc:call(Cp1, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp2, global, whereis_name, [test])) and
           (HPid      =:= rpc:call(Cp3, global, whereis_name, [test]))),
    
    % test re_register
    ?line {Pid2, yes} = start_proc(test),
    ?line ?UNTIL(Pid2 =:= rpc:call(Cp2, global, whereis_name, [test])),
    Pid3 = rpc:call(Cp2, ?MODULE, start_proc2, [test]),
    ?line ?UNTIL(Pid3 =:= rpc:call(Cp2, global, whereis_name, [test])),
    ?line Pid3 = global:whereis_name(test),

    % test sending
    ?line Pid3 = global:send(test, {ping, self()}),
    receive
	{pong, Cp2} -> ok
    after
	2000 -> test_server:fail(timeout1)
    end,

    rpc:call(Cp1, global, send, [test, {ping, self()}]),
    receive
	{pong, Cp2} -> ok
    after
	2000 -> test_server:fail(timeout2)
    end,

    ?line _ = rpc:call(Cp3, global, unregister_name, [test]),
    ?line
    ?UNTIL((Pid3      =:= global:whereis_name(test)) and
           (Pid3      =:= rpc:call(Cp1, global, whereis_name, [test])) and
           (Pid3      =:= rpc:call(Cp2, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp3, global, whereis_name, [test]))),

    ?line _ = global:unregister_name(test),
    ?line
    ?UNTIL((undefined =:= global:whereis_name(test)) and
           (undefined =:= rpc:call(Cp1, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp2, global, whereis_name, [test])) and
           (undefined =:= rpc:call(Cp3, global, whereis_name, [test]))),

    exit_p(Pid3),
    exit_p(HPid),

    ?line ?UNTIL(undefined =:= global:whereis_name(test)),

    write_high_level_trace(Config),
    % stop the nodes, and make sure names are released.
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

locks(suite) -> [];
locks(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line {ok, Cp1} = start_node(cp1, Config),
    ?line {ok, Cp2} = start_node(cp2, Config),
    ?line {ok, Cp3} = start_node(cp3, Config),

    ?line wait_for_ready_net(Config),

    % start two procs
    ?line Pid = start_proc(),
    ?line Pid2 = rpc:call(Cp1, ?MODULE, start_proc, []),
    % set a lock, and make sure noone else can set the same lock
    ?line true = global:set_lock({test_lock, self()}, ?NODES, 1),
    ?line false = req(Pid, {set_lock, test_lock, self()}),
    ?line false = req(Pid2, {set_lock, test_lock, self()}),
    % delete, and let another proc set the lock
    global:del_lock({test_lock, self()}),
    ?line true = req(Pid, {set_lock, test_lock, self()}),
    ?line false = req(Pid2, {set_lock, test_lock, self()}),
    ?line false = global:set_lock({test_lock, self()}, ?NODES,1),
    % kill lock-holding proc, make sure the lock is released
    exit_p(Pid),
    ?UNTIL(true =:= global:set_lock({test_lock, self()}, ?NODES,1)),
    Pid2 ! {set_lock_loop, test_lock, self()},
    % make sure we don't have the msg
    receive
	{got_lock, Pid2} -> test_server:fail(got_lock)
    after
	1000 -> ok
    end,
    global:del_lock({test_lock, self()}),
    % make sure pid2 got the lock
    receive
	{got_lock, Pid2} -> ok
    after
	% 12000 >> 5000, which is the max time before a new retry for
        % set_lock
	12000 -> test_server:fail(got_lock2)
    end,

    % let proc set the same lock
    ?line true = req(Pid2, {set_lock, test_lock, self()}),
    % let proc set new lock
    ?line true = req(Pid2, {set_lock, test_lock2, self()}),
    ?line false = global:set_lock({test_lock, self()},?NODES,1),    
    ?line false = global:set_lock({test_lock2, self()}, ?NODES,1),    
    exit_p(Pid2),
%    erlang:display({locks1, ets:tab2list(global_locks)}),
    ?UNTIL(true =:= global:set_lock({test_lock, self()}, ?NODES, 1)),
    ?UNTIL(true =:= global:set_lock({test_lock2, self()}, ?NODES, 1)),
    ?line global:del_lock({test_lock, self()}),
    ?line global:del_lock({test_lock2, self()}),

    % let proc set two locks
    ?line Pid3 = rpc:call(Cp1, ?MODULE, start_proc, []),
    ?line true = req(Pid3, {set_lock, test_lock, self()}),
    ?line true = req(Pid3, {set_lock, test_lock2, self()}),
    % del one lock
    ?line Pid3 ! {del_lock, test_lock2},
    ?line test_server:sleep(100),
    % check that one lock is still set, but not the other
    ?line false = global:set_lock({test_lock, self()}, ?NODES, 1),    
    ?line true = global:set_lock({test_lock2, self()}, ?NODES, 1),    
    ?line global:del_lock({test_lock2, self()}),
    % kill lock-holder
    exit_p(Pid3),
%    erlang:display({locks2, ets:tab2list(global_locks)}),
    ?UNTIL(true =:= global:set_lock({test_lock, self()}, ?NODES, 1)),
    ?line global:del_lock({test_lock, self()}),
    ?UNTIL(true =:= global:set_lock({test_lock2, self()}, ?NODES, 1)),
    ?line global:del_lock({test_lock2, self()}),

    % start one proc on each node
    ?line Pid4 = start_proc(),
    ?line Pid5 = rpc:call(Cp1, ?MODULE, start_proc, []),
    ?line Pid6 = rpc:call(Cp2, ?MODULE, start_proc, []),
    ?line Pid7 = rpc:call(Cp3, ?MODULE, start_proc, []),
    % set lock on two nodes
    ?line true = req(Pid4, {set_lock, test_lock, self(), [node(), Cp1]}),
    ?line false = req(Pid5, {set_lock, test_lock, self(), [node(), Cp1]}),
    % set same lock on other two nodes
    ?line true = req(Pid6, {set_lock, test_lock, self(), [Cp2, Cp3]}),
    ?line false = req(Pid7, {set_lock, test_lock, self(), [Cp2, Cp3]}),
    % release lock
    Pid6 ! {del_lock, test_lock, [Cp2, Cp3]},
    % try to set lock on a node that already has the lock
    ?line false = req(Pid6, {set_lock, test_lock, self(), [Cp1, Cp2, Cp3]}),

    % set lock on a node
    exit_p(Pid4),
    ?UNTIL(true =:= req(Pid5, {set_lock, test_lock, self(), [node(), Cp1]})),
    ?line Pid8 = start_proc(),
    ?line false = req(Pid8, {set_lock, test_lock, self()}),
    write_high_level_trace(Config),
    % stop the nodes, and make sure locks are released.
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    ?line test_server:sleep(100),
    ?line true = req(Pid8, {set_lock, test_lock, self()}),
    exit_p(Pid8),
    ?line test_server:sleep(10),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    

locks_hidden(suite) -> [];
locks_hidden(doc) ->
    ["Tests that locks on a hidden node doesn't interere with locks on "
     "visible nodes."];
locks_hidden(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNodes = nodes(),
    ?line {ok, Cp1} = start_node(cp1, Config),
    ?line {ok, Cp2} = start_node(cp2, Config),
    ?line {ok, Cp3} = start_hidden_node(cp3, Config),
    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp3]),
    ?line pong = rpc:call(Cp3, net_adm, ping, [Cp2]),
    ?line pong = rpc:call(Cp3, net_adm, ping, [node()]),

    ?line [] = [Cp1, Cp2 | OrigNodes] -- nodes(),

    % start two procs
    ?line Pid = start_proc(),
    ?line Pid2 = rpc:call(Cp1, ?MODULE, start_proc, []),
    ?line HPid = rpc:call(Cp3, ?MODULE, start_proc, []),
    % Make sure hidden node doesn't interfere with visible nodes lock
    ?line true = req(HPid, {set_lock, test_lock, self()}), 
    ?line true = global:set_lock({test_lock, self()}, ?NODES, 1),
    ?line false = req(Pid, {set_lock, test_lock, self()}),
    ?line true = req(HPid, {del_lock_sync, test_lock, self()}),     
    ?line false = req(Pid2, {set_lock, test_lock, self()}),
    % delete, and let another proc set the lock
    global:del_lock({test_lock, self()}),
    ?line true = req(Pid, {set_lock, test_lock, self()}),
    ?line false = req(Pid2, {set_lock, test_lock, self()}),
    ?line false = global:set_lock({test_lock, self()}, ?NODES,1),
    % kill lock-holding proc, make sure the lock is released
    exit_p(Pid),
    ?UNTIL(true =:= global:set_lock({test_lock, self()}, ?NODES, 1)),
    ?UNTIL(true =:= req(HPid, {set_lock, test_lock, self()})),
    Pid2 ! {set_lock_loop, test_lock, self()},
    % make sure we don't have the msg
    receive
	{got_lock, Pid2} -> test_server:fail(got_lock)
    after
	1000 -> ok
    end,
    global:del_lock({test_lock, self()}),
    % make sure pid2 got the lock
    receive
	{got_lock, Pid2} -> ok
    after
	% 12000 >> 5000, which is the max time before a new retry for
        % set_lock
	12000 -> test_server:fail(got_lock2)
    end,
    ?line true = req(HPid, {del_lock_sync, test_lock, self()}),     

    % let proc set the same lock
    ?line true = req(Pid2, {set_lock, test_lock, self()}),
    % let proc set new lock
    ?line true = req(Pid2, {set_lock, test_lock2, self()}),
    ?line true = req(HPid, {set_lock, test_lock, self()}), 
    ?line true = req(HPid, {set_lock, test_lock2, self()}), 
    exit_p(HPid),
    ?line false = global:set_lock({test_lock, self()},?NODES,1),    
    ?line false = global:set_lock({test_lock2, self()}, ?NODES,1),    
    exit_p(Pid2),
%    erlang:display({locks1, ets:tab2list(global_locks)}),
    ?UNTIL(true =:= global:set_lock({test_lock, self()}, ?NODES, 1)),
    ?UNTIL(true =:= global:set_lock({test_lock2, self()}, ?NODES, 1)),
    ?line global:del_lock({test_lock, self()}),
    ?line global:del_lock({test_lock2, self()}),

    write_high_level_trace(Config),
    % stop the nodes, and make sure locks are released.
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    

bad_input(suite) -> [];
bad_input(Config) when is_list(Config) ->
    Timeout = 15,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    Pid = whereis(global_name_server),
    ?line {'EXIT', _} = (catch global:set_lock(bad_id)),
    ?line {'EXIT', _} = (catch global:set_lock({id, self()}, bad_nodes)),
    ?line {'EXIT', _} = (catch global:del_lock(bad_id)),
    ?line {'EXIT', _} = (catch global:del_lock({id, self()}, bad_nodes)),
    ?line {'EXIT', _} = (catch global:register_name(name, bad_pid)),
    ?line {'EXIT', _} = (catch global:reregister_name(name, bad_pid)),
    ?line {'EXIT', _} = (catch global:trans(bad_id, {m,f})),
    ?line {'EXIT', _} = (catch global:trans({id, self()}, {m,f}, [node()], -1)),
    ?line Pid = whereis(global_name_server),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

names_and_locks(suite) -> [];
names_and_locks(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line {ok, Cp1} = start_node(cp1, Config),
    ?line {ok, Cp2} = start_node(cp2, Config),
    ?line {ok, Cp3} = start_node(cp3, Config),

    % start one proc on each node
    ?line PidTS = start_proc(),
    ?line Pid1 = rpc:call(Cp1, ?MODULE, start_proc, []),
    ?line Pid2 = rpc:call(Cp2, ?MODULE, start_proc, []),
    ?line Pid3 = rpc:call(Cp3, ?MODULE, start_proc, []),
    % register some of them
    ?line yes = global:register_name(test1, Pid1),
    ?line yes = global:register_name(test2, Pid2),
    ?line yes = global:register_name(test3, Pid3),
    ?line no = global:register_name(test3, PidTS),
    ?line yes = global:register_name(test4, PidTS),
    
    % set lock on two nodes
    ?line true = req(PidTS, {set_lock, test_lock, self(), [node(), Cp1]}),
    ?line false = req(Pid1, {set_lock, test_lock, self(), [node(), Cp1]}),
    % set same lock on other two nodes
    ?line true = req(Pid2, {set_lock, test_lock, self(), [Cp2, Cp3]}),
    ?line false = req(Pid3, {set_lock, test_lock, self(), [Cp2, Cp3]}),
    % release lock
    Pid2 ! {del_lock, test_lock, [Cp2, Cp3]},
    ?line test_server:sleep(100),
    % try to set lock on a node that already has the lock
    ?line false = req(Pid2, {set_lock, test_lock, self(), [Cp1, Cp2, Cp3]}),
    % set two locks
    ?line true = req(Pid2, {set_lock, test_lock, self(), [Cp2, Cp3]}),
    ?line true = req(Pid2, {set_lock, test_lock2, self(), [Cp2, Cp3]}),

    % kill some processes, make sure all locks/names are released
    exit_p(PidTS),
    ?line ?UNTIL(undefined =:= global:whereis_name(test4)),
    ?line true = global:set_lock({test_lock, self()}, [node(), Cp1], 1),    
    global:del_lock({test_lock, self()}, [node(), Cp1]),
    
    exit_p(Pid2),
    ?line
    ?UNTIL((undefined =:= global:whereis_name(test2)) and
           (true =:= global:set_lock({test_lock, self()}, [Cp2, Cp3], 1)) and
           (true =:= global:set_lock({test_lock2, self()}, [Cp2, Cp3], 1))),

    global:del_lock({test_lock, self()}, [Cp2, Cp3]),
    global:del_lock({test_lock2, self()}, [Cp2, Cp3]),

    exit_p(Pid1),
    exit_p(Pid3),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    
lock_die(suite) -> [];
lock_die(doc) ->
    ["OTP-6341. Remove locks using monitors."];
lock_die(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line {ok, Cp1} = start_node(cp1, Config),
    ?line {ok, Cp2} = start_node(cp2, Config),

    %% First test.
    LockId = {id, self()},
    ?line Pid2 = start_proc(),
    ?line true = req(Pid2, {set_lock2, LockId, self()}),

    ?line true = global:set_lock(LockId, [Cp1]),
    %% Id is locked on Cp1 and Cp2 (by Pid2) but not by self(): 
    %% (there is no mon. ref)
    ?line _ = global:del_lock(LockId, [node(), Cp1, Cp2]),

    ?line exit_p(Pid2),
    
    %% Second test.
    ?line Pid3 = start_proc(),
    ?line true = req(Pid3, {set_lock, id, self(), [Cp1]}),
    %% The lock is removed from Cp1 thanks to monitors.
    ?line exit_p(Pid3),
    
    ?line true = global:set_lock(LockId, [node(), Cp1]),
    ?line _ = global:del_lock(LockId, [node(), Cp1]),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),
    write_high_level_trace(Config),
    stop_node(Cp1),
    stop_node(Cp2),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

name_die(suite) -> [];
name_die(doc) ->
    ["OTP-6341. Remove names using monitors."];
name_die(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),
    ?line [Cp1] = Cps = start_nodes([z], peer,  Config), % z > test_server
    Nodes = lists:sort([node() | Cps]),
    ?line wait_for_ready_net(Config),
    
    Name = name_die,
    ?line Pid = rpc:call(Cp1, ?MODULE, start_proc, []),

    %% Test 1. No resolver is called if the same pid is registered on
    %% both partitions.
    T1 = node(),
    Part1 = [T1],
    Part2 = [Cp1],
    ?line rpc_cast(Cp1, 
                   ?MODULE, part_2_2, [Config,
                                       Part1, 
                                       Part2, 
                                       []]),
    ?line ?UNTIL(is_ready_partition(Config)),
    ?line ?UNTIL(undefined =:= global:whereis_name(Name)),
    ?line yes = global:register_name(Name, Pid),

    ?line pong = net_adm:ping(Cp1),
    ?line wait_for_ready_net(Nodes, Config),
    ?line assert_pid(global:whereis_name(Name)),
    exit_p(Pid),
    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    %% Test 2. Register a name running outside the current partition.
    %% Killing the pid will not remove the name from the current
    %% partition, unless monitors are used.
    ?line Pid2 = rpc:call(Cp1, ?MODULE, start_proc, []),
    Dir = ?config(priv_dir, Config),
    KillFile = filename:join([Dir, "kill.txt"]),
    file:delete(KillFile),
    ?line erlang:spawn(Cp1, fun() -> kill_pid(Pid2, KillFile, Config) end),
    ?line rpc_cast(Cp1, 
                   ?MODULE, part_2_2, [Config,
                                       Part1, 
                                       Part2, 
                                       []]),
    ?line ?UNTIL(is_ready_partition(Config)),
    ?line ?UNTIL(undefined =:= global:whereis_name(Name)),
    ?line yes = global:register_name(Name, Pid2),
    ?line touch(KillFile, "kill"),    
    ?line file_contents(KillFile, "done", Config),
    file:delete(KillFile),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),
    write_high_level_trace(Config),
    stop_nodes(Cps),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

kill_pid(Pid, File, Config) ->
    file_contents(File, "kill", Config),
    exit_p(Pid),
    touch(File, "done").

basic_partition(suite) -> [];
basic_partition(doc) ->
    ["Tests that two partitioned networks exchange correct info."];
basic_partition(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [Cp1, Cp2, Cp3] = start_nodes([cp1, cp2, cp3], peer, Config),
    ?line [Cp1, Cp2, Cp3] = lists:sort(nodes()),

    ?line wait_for_ready_net(Config),

    % make cp2 and cp3 connected, partitioned from us and cp1
    ?line rpc_cast(Cp2, ?MODULE, part1, [Config, node(), Cp1, Cp3]),
    ?line ?UNTIL(is_ready_partition(Config)),
   
    % start different processes in both partitions
    ?line {Pid, yes} = start_proc(test),

    % connect to other partition
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line [Cp1, Cp2, Cp3] = lists:sort(nodes()),
    
    % check names
    ?line ?UNTIL(Pid =:= rpc:call(Cp2, global, whereis_name, [test])),
    ?line ?UNTIL(undefined =/= global:whereis_name(test2)),
    ?line Pid2 = global:whereis_name(test2),
    ?line Pid2 = rpc:call(Cp2, global, whereis_name, [test2]),
    ?line assert_pid(Pid2),
    ?line Pid3 = global:whereis_name(test4),
    ?line ?UNTIL(Pid3 =:= rpc:call(Cp1, global, whereis_name, [test4])),
    ?line assert_pid(Pid3),

    % kill all procs
    ?line Pid3 = global:send(test4, die),
    % sleep to let the proc die
    wait_for_exit(Pid3),
    ?line ?UNTIL(undefined =:= global:whereis_name(test4)),
    
    exit_p(Pid),
    exit_p(Pid2),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

basic_name_partition(suite) ->
    [];
basic_name_partition(doc) ->
    ["Creates two partitions with two nodes in each partition.",
     "Tests that names are exchanged correctly, and that EXITs",
     "during connect phase are handled correctly."];
basic_name_partition(Config) when is_list(Config) ->
    Timeout = 60,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [Cp1, Cp2, Cp3] = start_nodes([cp1, cp2, cp3], peer, Config),
    ?line [Cp1, Cp2, Cp3] = lists:sort(nodes()),
    Nodes = ?NODES,

    ?line wait_for_ready_net(Config),

    % There used to be more than one name registered for some
    % processes. That was a mistake; there is no support for more than
    % one name per process, and the manual is quite clear about that
    % ("equivalent to the register/2 and whereis/1 BIFs"). The
    % resolver procedure did not take care of such "duplicated" names,
    % which caused this testcase to fail every now and then.

    % make cp2 and cp3 connected, partitioned from us and cp1
    % us:  register name03
    % cp1: register name12
    % cp2: register name12
    % cp3: register name03
    
    ?line rpc_cast(Cp2, ?MODULE, part1_5, [Config, node(), Cp1, Cp3]),
    ?line ?UNTIL(is_ready_partition(Config)),
    
    % start different processes in both partitions
    ?line {_, yes} = start_proc_basic(name03),
    ?line {_, yes} = rpc:call(Cp1, ?MODULE, start_proc_basic, [name12]),
    test_server:sleep(1000),

    % connect to other partition
    ?line pong = net_adm:ping(Cp3),
    
    ?line ?UNTIL([Cp1, Cp2, Cp3] =:= lists:sort(nodes())),
    ?line wait_for_ready_net(Config),
    % check names
    ?line Pid03 = global:whereis_name(name03),
    ?line assert_pid(Pid03),
    ?line true = lists:member(node(Pid03), [node(), Cp3]),
    ?line check_everywhere(Nodes, name03, Config),
   
    ?line Pid12 = global:whereis_name(name12),
    ?line assert_pid(Pid12),
    ?line true = lists:member(node(Pid12), [Cp1, Cp2]),
    ?line check_everywhere(Nodes, name12, Config),

    % kill all procs
    ?line Pid12 = global:send(name12, die),
    ?line Pid03 = global:send(name03, die),
    % sleep to let the procs die
    wait_for_exit(Pid12),
    wait_for_exit(Pid03),
    ?line 
    ?UNTIL(begin
	       Names = [name03, name12],
	       lists:duplicate(length(Names), undefined)
		   =:= [global:whereis_name(Name) || Name <- Names]
	   end),
    
    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%Peer nodes cp0 - cp6 are started. Break apart the connections from
%cp3-cp6 to cp0-cp2 and test_server so we get two partitions.
%In the cp3-cp6 partition, start one process on each node and register
%using both erlang:register, and global:register (test1 on cp3, test2 on
%cp4, test3 on cp5, test4 on cp6), using different resolution functions:
%default for test1, notify_all_name for test2, random_notify_name for test3
%and one for test4 that sends a message to test_server and keeps the
%process which is greater in the standard ordering. In the other partition,
%do the same (test1 on test_server, test2 on cp0, test3 on cp1, test4 on cp2).
%Sleep a little, then from test_server, connect to cp3-cp6 in order.
%Check that the values for the registered names are the expected ones, and
%that the messages from test4 arrive.

advanced_partition(suite) ->
    [];
advanced_partition(doc) ->
    ["Test that names are resolved correctly when two",
     "partitioned networks connect."];
advanced_partition(Config) when is_list(Config) ->
    Timeout = 60,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6]
	= start_nodes([cp0, cp1, cp2, cp3, cp4, cp5, cp6], peer, Config),
    Nodes = lists:sort([node(), Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6]),
    ?line wait_for_ready_net(Config),

    % make cp3-cp6 connected, partitioned from us and cp0-cp2
    ?line rpc_cast(Cp3, ?MODULE, part2,
                   [Config, self(), node(), Cp0, Cp1, Cp2, Cp3, Cp4, Cp5,Cp6]),
    ?line ?UNTIL(is_ready_partition(Config)),
    
    % start different processes in this partition
    ?line start_procs(self(), Cp0, Cp1, Cp2, Config),

    % connect to other partition
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),
    ?line pong = net_adm:ping(Cp6),
    
    ?line wait_for_ready_net(Config),

    ?line 
    ?UNTIL(lists:member(undefined,
			[rpc:call(Cp3, erlang, whereis, [test1]),
			 rpc:call(node(), erlang, whereis, [test1])])),

    Nt1 = rpc:call(Cp3, erlang, whereis, [test1]),
    Nt2 = rpc:call(Cp4, erlang, whereis, [test2]),
    Nt3 = rpc:call(Cp5, erlang, whereis, [test3]),
    Nt4 = rpc:call(Cp6, erlang, whereis, [test4]),

    Mt1 = rpc:call(node(), erlang, whereis, [test1]),
    Mt2 = rpc:call(Cp0, erlang, whereis, [test2]),
    Mt3 = rpc:call(Cp1, erlang, whereis, [test3]),
    _Mt4 = rpc:call(Cp2, erlang, whereis, [test4]),

    % check names
    ?line Pid1 = global:whereis_name(test1),
    ?line Pid1 = rpc:call(Cp3, global, whereis_name, [test1]),
    ?line assert_pid(Pid1),
    ?line true = lists:member(Pid1, [Nt1, Mt1]),
    ?line true = lists:member(undefined, [Nt1, Mt1]),
    ?line check_everywhere(Nodes, test1, Config),
    
    ?line undefined = global:whereis_name(test2),
    ?line undefined = rpc:call(Cp3, global, whereis_name, [test2]),
    ?line yes = sreq(Nt2, {got_notify, self()}),
    ?line yes = sreq(Mt2, {got_notify, self()}),
    ?line check_everywhere(Nodes, test2, Config),

    ?line Pid3 = global:whereis_name(test3),
    ?line Pid3 = rpc:call(Cp3, global, whereis_name, [test3]),
    ?line assert_pid(Pid3),
    ?line true = lists:member(Pid3, [Nt3, Mt3]),
    ?line no = sreq(Pid3, {got_notify, self()}),
    ?line yes = sreq(other(Pid3, [Nt2, Nt3]), {got_notify, self()}),
    ?line check_everywhere(Nodes, test3, Config),

    ?line Pid4 = global:whereis_name(test4),
    ?line Pid4 = rpc:call(Cp3, global, whereis_name, [test4]),
    ?line assert_pid(Pid4),
%    ?line true = lists:member(Pid4, [Nt4, Mt4]),
    ?line Pid4 = Nt4,
    ?line check_everywhere(Nodes, test4, Config),
    
    ?line 1 = collect_resolves(),

    ?line Pid1 = global:send(test1, die),
    exit_p(Pid3),
    exit_p(Pid4),
    wait_for_exit(Pid1),
    wait_for_exit(Pid3),
    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp0),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    stop_node(Cp4),
    stop_node(Cp5),
    stop_node(Cp6),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    
%Peer nodes cp0 - cp6 are started, and partitioned just like in
%advanced_partition. Start cp8, only connected to test_server. Let cp6
%break apart from the rest, and 12 s later, ping cp0 and cp3, and
%register the name test5. After the same 12 s, let cp5 halt.
%Wait for the death of cp5. Ping cp3 (at the same time as cp6 does).
%Take down cp2. Start cp7, restart cp2. Ping cp4, cp6 and cp8.
%Now, expect all nodes to be connected and have the same picture of all
%registered names.

stress_partition(suite) ->
    [];
stress_partition(doc) ->
    ["Stress global, make a partitioned net, make some nodes",
     "go up/down a bit."];
stress_partition(Config) when is_list(Config) ->
    Timeout = 90,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6]
	= start_nodes([cp0, cp1, cp2, cp3, cp4, cp5, cp6], peer, Config),

    ?line wait_for_ready_net(Config),

    % make cp3-cp5 connected, partitioned from us and cp0-cp2
    % cp6 is alone (single node).  cp6 pings cp0 and cp3 in 12 secs...
    ?line rpc_cast(Cp3, ?MODULE, part3,
                   [Config, self(), node(), Cp0, Cp1, Cp2, Cp3, Cp4, Cp5,Cp6]),
    ?line ?UNTIL(is_ready_partition(Config)),
    
    % start different processes in this partition
    ?line start_procs(self(), Cp0, Cp1, Cp2, Config),

    ?line {ok, Cp8} = start_peer_node(cp8, Config),
    
    monitor_node(Cp5, true),
    receive
	{nodedown, Cp5} -> ok
    after
	20000 -> test_server:fail({no_nodedown, Cp5})
    end,
    monitor_node(Cp5, false),    

    % Ok, now cp6 pings us, and cp5 will go down.
    
    % connect to other partition
    ?line pong = net_adm:ping(Cp3),
    ?line rpc_cast(Cp2, ?MODULE, crash, [0]),
    
    % Start new nodes
    ?line {ok, Cp7} = start_peer_node(cp7, Config),
    ?line {ok, Cp2_2} = start_peer_node(cp2, Config),
    Nodes = lists:sort([node(), Cp0, Cp1, Cp2_2, Cp3, Cp4, Cp6, Cp7, Cp8]),
    put(?nodes_tag, Nodes),

    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp6),
    ?line pong = net_adm:ping(Cp8),

    ?line wait_for_ready_net(Nodes, Config),

    % Make sure that all nodes have the same picture of all names
    ?line check_everywhere(Nodes, test1, Config),
    ?line assert_pid(global:whereis_name(test1)),
    
    ?line check_everywhere(Nodes, test2, Config),
    ?line undefined = global:whereis_name(test2),

    ?line check_everywhere(Nodes, test3, Config),
    ?line assert_pid(global:whereis_name(test3)),

    ?line check_everywhere(Nodes, test4, Config),
    ?line assert_pid(global:whereis_name(test4)),

    ?line check_everywhere(Nodes, test5, Config),
    ?line ?UNTIL(undefined =:= global:whereis_name(test5)),
    
    ?line assert_pid(global:send(test1, die)),
    ?line assert_pid(global:send(test3, die)),
    ?line assert_pid(global:send(test4, die)),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp0),
    stop_node(Cp1),
    stop_node(Cp2_2),
    stop_node(Cp3),
    stop_node(Cp4),
    stop_node(Cp5),
    stop_node(Cp6),
    stop_node(Cp7),
    stop_node(Cp8),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.


%% Use this one to test alot of connection tests
%%  erl -sname ts -rsh ctrsh -pa /clearcase/otp/internal_tools/test_server/ebin/ -ring_line 10000 -s test_server run_test global_SUITE

ring_line(suite) -> [];
ring_line(doc) -> [""];
ring_line(Config) when is_list(Config) ->
    {ok, [[N]]} = init:get_argument(ring_line),
    loop_it(list_to_integer(N), Config).

loop_it(N, Config) -> loop_it(N,N, Config).

loop_it(0,_, _Config) -> ok;
loop_it(N,M, Config) ->
    test_server:format(1, "Round: ~w", [M-N]),
    ring(Config),
    line(Config),
    loop_it(N-1,M, Config).


ring(suite) ->
    [];
ring(doc) ->
    ["Make 10 single nodes, all having the same name.",
     "Make all ping its predecessor, pinging in a ring.",
     "Make sure that there's just one winner."];
ring(Config) when is_list(Config) ->
    Timeout = 60,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6, Cp7, Cp8]
	= start_nodes([cp0, cp1, cp2, cp3, cp4, cp5, cp6, cp7, cp8], 
                      peer, Config),
    Nodes = lists:sort([node(), Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6, Cp7, Cp8]),

    ?line wait_for_ready_net(Config),

    Time = msec() + 7000,

    ?line rpc_cast(Cp0, ?MODULE, single_node, [Time, Cp8, Config]),
    ?line rpc_cast(Cp1, ?MODULE, single_node, [Time, Cp0, Config]),
    ?line rpc_cast(Cp2, ?MODULE, single_node, [Time, Cp1, Config]),
    ?line rpc_cast(Cp3, ?MODULE, single_node, [Time, Cp2, Config]),
    ?line rpc_cast(Cp4, ?MODULE, single_node, [Time, Cp3, Config]),
    ?line rpc_cast(Cp5, ?MODULE, single_node, [Time, Cp4, Config]),
    ?line rpc_cast(Cp6, ?MODULE, single_node, [Time, Cp5, Config]),
    ?line rpc_cast(Cp7, ?MODULE, single_node, [Time, Cp6, Config]),
    ?line rpc_cast(Cp8, ?MODULE, single_node, [Time, Cp7, Config]),
    
    % sleep to make the partitioned net ready
    test_server:sleep(Time - msec()),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),
    ?line pong = net_adm:ping(Cp6),
    ?line pong = net_adm:ping(Cp7),
    ?line pong = net_adm:ping(Cp8),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),
    ?line pong = net_adm:ping(Cp6),
    ?line pong = net_adm:ping(Cp7),
    ?line pong = net_adm:ping(Cp8),

    ?line wait_for_ready_net(Nodes, Config),

    % Just make sure that all nodes have the same picture of all names
    ?line check_everywhere(Nodes, single_name, Config),
    ?line assert_pid(global:whereis_name(single_name)),

    ?line 
    ?UNTIL(begin
               {Ns2, []} = rpc:multicall(Nodes, erlang, whereis, 
                                         [single_name]),
               9 =:= lists:foldl(fun(undefined, N) -> N + 1;
                                    (_, N) -> N
                                 end,
                                 0, Ns2)
           end),
    
    ?line assert_pid(global:send(single_name, die)),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp0),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    stop_node(Cp4),
    stop_node(Cp5),
    stop_node(Cp6),
    stop_node(Cp7),
    stop_node(Cp8),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

simple_ring(suite) ->
    [];
simple_ring(doc) ->
    ["Simpler version of the ring case.  Used because there are some",
     "distribution problems with many nodes.",
     "Make 6 single nodes, all having the same name.",
     "Make all ping its predecessor, pinging in a ring.",
     "Make sure that there's just one winner."];
simple_ring(Config) when is_list(Config) ->
    Timeout = 60,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    Names = [cp0, cp1, cp2, cp3, cp4, cp5],
    ?line [Cp0, Cp1, Cp2, Cp3, Cp4, Cp5]
	= start_nodes(Names, peer, Config),
    Nodes = lists:sort([node(), Cp0, Cp1, Cp2, Cp3, Cp4, Cp5]),

    ?line wait_for_ready_net(Config),

    Time = msec() + 5000,

    ?line rpc_cast(Cp0, ?MODULE, single_node, [Time, Cp5, Config]),
    ?line rpc_cast(Cp1, ?MODULE, single_node, [Time, Cp0, Config]),
    ?line rpc_cast(Cp2, ?MODULE, single_node, [Time, Cp1, Config]),
    ?line rpc_cast(Cp3, ?MODULE, single_node, [Time, Cp2, Config]),
    ?line rpc_cast(Cp4, ?MODULE, single_node, [Time, Cp3, Config]),
    ?line rpc_cast(Cp5, ?MODULE, single_node, [Time, Cp4, Config]),
    
    % sleep to make the partitioned net ready
    test_server:sleep(Time - msec()),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),

    ?line wait_for_ready_net(Nodes, Config),

    % Just make sure that all nodes have the same picture of all names
    ?line check_everywhere(Nodes, single_name, Config),
    ?line assert_pid(global:whereis_name(single_name)),

    ?line 
    ?UNTIL(begin
               {Ns2, []} = rpc:multicall(Nodes, erlang, whereis, 
                                         [single_name]),
               6 =:= lists:foldl(fun(undefined, N) -> N + 1;
                                    (_, N) -> N
                                 end,
                                 0, Ns2)
           end),
    
    ?line assert_pid(global:send(single_name, die)),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp0),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    stop_node(Cp4),
    stop_node(Cp5),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

line(suite) ->
    [];
line(doc) ->
    ["Make 6 single nodes, all having the same name.",
     "Make all ping its predecessor, pinging in a line.",
     "Make sure that there's just one winner."];
line(Config) when is_list(Config) ->
    Timeout = 60,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6, Cp7, Cp8]
	= start_nodes([cp0, cp1, cp2, cp3, cp4, cp5, cp6, cp7, cp8], 
                      peer, Config),
    Nodes = lists:sort([node(), Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6, Cp7, Cp8]),

    ?line wait_for_ready_net(Config),

    Time = msec() + 7000,

    ?line rpc_cast(Cp0, ?MODULE, single_node, 
                   [Time, Cp0, Config]), % ping ourself!
    ?line rpc_cast(Cp1, ?MODULE, single_node, [Time, Cp0, Config]),
    ?line rpc_cast(Cp2, ?MODULE, single_node, [Time, Cp1, Config]),
    ?line rpc_cast(Cp3, ?MODULE, single_node, [Time, Cp2, Config]),
    ?line rpc_cast(Cp4, ?MODULE, single_node, [Time, Cp3, Config]),
    ?line rpc_cast(Cp5, ?MODULE, single_node, [Time, Cp4, Config]),
    ?line rpc_cast(Cp6, ?MODULE, single_node, [Time, Cp5, Config]),
    ?line rpc_cast(Cp7, ?MODULE, single_node, [Time, Cp6, Config]),
    ?line rpc_cast(Cp8, ?MODULE, single_node, [Time, Cp7, Config]),

    % sleep to make the partitioned net ready
    test_server:sleep(Time - msec()),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),
    ?line pong = net_adm:ping(Cp6),
    ?line pong = net_adm:ping(Cp7),
    ?line pong = net_adm:ping(Cp8),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),
    ?line pong = net_adm:ping(Cp6),
    ?line pong = net_adm:ping(Cp7),
    ?line pong = net_adm:ping(Cp8),

    ?line wait_for_ready_net(Nodes, Config),

    % Just make sure that all nodes have the same picture of all names
    ?line check_everywhere(Nodes, single_name, Config),
    ?line assert_pid(global:whereis_name(single_name)),

    ?line 
    ?UNTIL(begin
	       {Ns2, []} = rpc:multicall(Nodes, erlang, whereis,
					 [single_name]),
 	       9 =:= lists:foldl(fun(undefined, N) -> N + 1;
                                    (_, N) -> N
                                 end,
                                 0, Ns2)
	   end),
    
    ?line assert_pid(global:send(single_name, die)),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp0),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    stop_node(Cp4),
    stop_node(Cp5),
    stop_node(Cp6),
    stop_node(Cp7),
    stop_node(Cp8),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.


simple_line(suite) ->
    [];
simple_line(doc) ->
    ["Simpler version of the line case.  Used because there are some",
     "distribution problems with many nodes.",
     "Make 6 single nodes, all having the same name.",
     "Make all ping its predecessor, pinging in a line.",
     "Make sure that there's just one winner."];
simple_line(Config) when is_list(Config) ->
    Timeout = 60,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [Cp0, Cp1, Cp2, Cp3, Cp4, Cp5]
	= start_nodes([cp0, cp1, cp2, cp3, cp4, cp5], peer, Config),
    Nodes = lists:sort([node(), Cp0, Cp1, Cp2, Cp3, Cp4, Cp5]),

    ?line wait_for_ready_net(Config),

    Time = msec() + 5000,

    ?line rpc_cast(Cp0, ?MODULE, single_node, 
                   [Time, Cp0, Config]), % ping ourself!
    ?line rpc_cast(Cp1, ?MODULE, single_node, [Time, Cp0, Config]),
    ?line rpc_cast(Cp2, ?MODULE, single_node, [Time, Cp1, Config]),
    ?line rpc_cast(Cp3, ?MODULE, single_node, [Time, Cp2, Config]),
    ?line rpc_cast(Cp4, ?MODULE, single_node, [Time, Cp3, Config]),
    ?line rpc_cast(Cp5, ?MODULE, single_node, [Time, Cp4, Config]),
    
    % sleep to make the partitioned net ready
    test_server:sleep(Time - msec()),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),

    ?line pong = net_adm:ping(Cp0),
    ?line pong = net_adm:ping(Cp1),
    ?line pong = net_adm:ping(Cp2),
    ?line pong = net_adm:ping(Cp3),
    ?line pong = net_adm:ping(Cp4),
    ?line pong = net_adm:ping(Cp5),

    ?line wait_for_ready_net(Nodes, Config),

    % Just make sure that all nodes have the same picture of all names
    ?line check_everywhere(Nodes, single_name, Config),
    ?line assert_pid(global:whereis_name(single_name)),

    ?line 
    ?UNTIL(begin
	       {Ns2, []} = rpc:multicall(Nodes, erlang, whereis,
					 [single_name]),
 	       6 =:= lists:foldl(fun(undefined, N) -> N + 1;
                                    (_, N) -> N
                                 end,
                                 0, Ns2)
	   end),
    
    ?line assert_pid(global:send(single_name, die)),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),

    write_high_level_trace(Config),
    stop_node(Cp0),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    stop_node(Cp4),
    stop_node(Cp5),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    
otp_1849(suite) -> [];
otp_1849(doc) ->
    ["Test ticket: Global should keep track of all pids that set the same lock."];
otp_1849(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line {ok, Cp1} = start_node(cp1, Config),
    ?line {ok, Cp2} = start_node(cp2, Config),
    ?line {ok, Cp3} = start_node(cp3, Config),

    ?line wait_for_ready_net(Config),

    % start procs on each node
    ?line Pid1 = rpc:call(Cp1, ?MODULE, start_proc, []),
    ?line assert_pid(Pid1),
    ?line Pid2 = rpc:call(Cp2, ?MODULE, start_proc, []),
    ?line assert_pid(Pid2),
    ?line Pid3 = rpc:call(Cp3, ?MODULE, start_proc, []),
    ?line assert_pid(Pid3),

    % set a lock on every node
    ?line true = req(Pid1, {set_lock2, {test_lock, ?MODULE}, self()}),
    ?line true = req(Pid2, {set_lock2, {test_lock, ?MODULE}, self()}),
    ?line true = req(Pid3, {set_lock2, {test_lock, ?MODULE}, self()}),

    ?line
    ?UNTIL(begin 
               [{test_lock, ?MODULE, Lock1}] = 
                   rpc:call(Cp1, ets, tab2list, [global_locks]),
               3 =:= length(Lock1)
           end),

    ?line true = req(Pid3, {del_lock2, {test_lock, ?MODULE}, self()}),
    ?line
    ?UNTIL(begin
               [{test_lock, ?MODULE, Lock2}] = 
                   rpc:call(Cp1, ets, tab2list, [global_locks]),
               2 =:= length(Lock2)
           end),

    ?line true = req(Pid2, {del_lock2, {test_lock, ?MODULE}, self()}),
    ?line
    ?UNTIL(begin
               [{test_lock, ?MODULE, Lock3}] = 
                   rpc:call(Cp1, ets, tab2list, [global_locks]),
               1 =:= length(Lock3)
           end),

    ?line true = req(Pid1, {del_lock2, {test_lock, ?MODULE}, self()}),
    ?line ?UNTIL([] =:= rpc:call(Cp1, ets, tab2list, [global_locks])),


    ?line true = req(Pid1, {set_lock2, {test_lock, ?MODULE}, self()}),
    ?line true = req(Pid2, {set_lock2, {test_lock, ?MODULE}, self()}),
    ?line true = req(Pid3, {set_lock2, {test_lock, ?MODULE}, self()}),
    ?line false = req(Pid2, {set_lock2, {test_lock, not_valid}, self()}),

    exit_p(Pid1),
    ?line
    ?UNTIL(begin
               [{test_lock, ?MODULE, Lock10}] = 
                   rpc:call(Cp1, ets, tab2list, [global_locks]),
               2 =:= length(Lock10)
           end),
    ?line
    ?UNTIL(begin
               [{test_lock, ?MODULE, Lock11}] = 
                   rpc:call(Cp2, ets, tab2list, [global_locks]),
               2 =:= length(Lock11)
           end),
    ?line
    ?UNTIL(begin
               [{test_lock, ?MODULE, Lock12}] = 
                   rpc:call(Cp3, ets, tab2list, [global_locks]),
               2 =:= length(Lock12)
           end),

    write_high_level_trace(Config),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    

otp_3162(suite) -> [];
otp_3162(doc) ->
    ["Test ticket: Deadlock in global"];
otp_3162(Config) when is_list(Config) ->
    StartFun = fun() ->
                       {ok, Cp1} = start_node(cp1, Config),
                       {ok, Cp2} = start_node(cp2, Config),
                       {ok, Cp3} = start_node(cp3, Config),
                       [Cp1, Cp2, Cp3]
               end,
    do_otp_3162(StartFun, Config).

do_otp_3162(StartFun, Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line [Cp1, Cp2, Cp3] = StartFun(),

    ?line wait_for_ready_net(Config),

    % start procs on each node
    ?line Pid1 = rpc:call(Cp1, ?MODULE, start_proc4, [kalle]),
    ?line assert_pid(Pid1),
    ?line Pid2 = rpc:call(Cp2, ?MODULE, start_proc4, [stina]),
    ?line assert_pid(Pid2),
    ?line Pid3 = rpc:call(Cp3, ?MODULE, start_proc4, [vera]),
    ?line assert_pid(Pid3),

    ?line rpc_disconnect_node(Cp1, Cp2, Config),

    ?line ?UNTIL
       ([Cp3] =:= lists:sort(rpc:call(Cp1, erlang, nodes, [])) -- [node()]),

    ?line ?UNTIL([kalle, test_server, vera] =:=
	   lists:sort(rpc:call(Cp1, global, registered_names, []))),
    ?line ?UNTIL
       ([Cp3] =:= lists:sort(rpc:call(Cp2, erlang, nodes, [])) -- [node()]),
    ?line ?UNTIL([stina, test_server, vera] =:=
           lists:sort(rpc:call(Cp2, global, registered_names, []))),
    ?line ?UNTIL
       ([Cp1, Cp2] =:= 
        lists:sort(rpc:call(Cp3, erlang, nodes, [])) -- [node()]),
    ?line ?UNTIL([kalle, stina, test_server, vera] =:=
  	   lists:sort(rpc:call(Cp3, global, registered_names, []))),

    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp1]),

    ?line ?UNTIL
       ([Cp2, Cp3] =:=
        lists:sort(rpc:call(Cp1, erlang, nodes, [])) -- [node()]),
    ?line 
    ?UNTIL(begin
	       NN = lists:sort(rpc:call(Cp1, global, registered_names, [])),
	       [kalle, stina, test_server, vera] =:= NN
	   end),
    ?line ?UNTIL
       ([Cp1, Cp3] =:=
        lists:sort(rpc:call(Cp2, erlang, nodes, [])) -- [node()]),
    ?line ?UNTIL([kalle, stina, test_server, vera] =:=
	lists:sort(rpc:call(Cp2, global, registered_names, []))),
    ?line ?UNTIL
       ([Cp1, Cp2] =:=
        lists:sort(rpc:call(Cp3, erlang, nodes, [])) -- [node()]),
    ?line ?UNTIL([kalle, stina, test_server, vera] =:=
 	lists:sort(rpc:call(Cp3, global, registered_names, []))),

    write_high_level_trace(Config),
    stop_node(Cp1),
    stop_node(Cp2),
    stop_node(Cp3),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    

otp_5640(suite) -> [];
otp_5640(doc) ->
    ["OTP-5640. 'allow' multiple names for registered processes."];
otp_5640(Config) when is_list(Config) ->
    Timeout = 25,
    ?line Dog = test_server:timetrap(test_server:seconds(Timeout)),
    init_high_level_trace(Timeout),
    init_condition(Config),
    ?line {ok, B} = start_node(b, Config),

    ?line Nodes = lists:sort([node(), B]),
    ?line wait_for_ready_net(Nodes, Config),

    Server = whereis(global_name_server),
    ServerB = rpc:call(B, erlang, whereis, [global_name_server]),

    Me = self(),
    Proc = spawn(fun() -> otp_5640_proc(Me) end),

    ?line yes = global:register_name(name1, Proc),
    ?line no = global:register_name(name2, Proc),

    ?line ok = application:set_env(kernel, global_multi_name_action, allow),
    ?line yes = global:register_name(name2, Proc),

    test_server:sleep(100),
    ?line Proc = global:whereis_name(name1),
    ?line Proc = global:whereis_name(name2),
    ?line check_everywhere(Nodes, name1, Config),
    ?line check_everywhere(Nodes, name2, Config),

    ?line {monitors_2levels, MonBy1} = mon_by_servers(Proc),
    ?line [] = ([Server,Server,ServerB,ServerB] -- MonBy1),
    ?line {links,[]} = process_info(Proc, links),
    ?line _ = global:unregister_name(name1),

    test_server:sleep(100),
    ?line undefined = global:whereis_name(name1),
    ?line Proc = global:whereis_name(name2),
    ?line check_everywhere(Nodes, name1, Config),
    ?line check_everywhere(Nodes, name2, Config),

    ?line {monitors_2levels, MonBy2} = mon_by_servers(Proc),
    ?line [] = ([Server,ServerB] -- MonBy2),
    TmpMonBy2 = MonBy2 -- [Server,ServerB],
    ?line TmpMonBy2 = TmpMonBy2 -- [Server,ServerB],
    ?line {links,[]} = process_info(Proc, links),

    ?line yes = global:register_name(name1, Proc),

    Proc ! die,

    test_server:sleep(100),
    ?line undefined = global:whereis_name(name1),
    ?line undefined = global:whereis_name(name2),
    ?line check_everywhere(Nodes, name1, Config),
    ?line check_everywhere(Nodes, name2, Config),
    ?line {monitors, GMonitors} = process_info(Server, monitors),
    ?line false = lists:member({process, Proc}, GMonitors),

    write_high_level_trace(Config),
    stop_node(B),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

otp_5640_proc(_Parent) ->
    receive 
        die ->
            exit(normal)
    end.

otp_5737(suite) -> [];
otp_5737(doc) ->
    ["OTP-5737. set_lock/3 and trans/4 accept Retries = 0."];
otp_5737(Config) when is_list(Config) ->
    Timeout = 25,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    

    LockId = {?MODULE,self()},
    Nodes = [node()],
    ?line {'EXIT', _} = (catch global:set_lock(LockId, Nodes, -1)),
    ?line {'EXIT', _} = (catch global:set_lock(LockId, Nodes, a)),
    ?line true = global:set_lock(LockId, Nodes, 0),
    Time1 = now(),
    ?line false = global:set_lock({?MODULE,not_me}, Nodes, 0),
    ?line true = timer:now_diff(now(), Time1) < 5000,
    ?line _ = global:del_lock(LockId, Nodes),

    Fun = fun() -> ok end,
    ?line {'EXIT', _} = (catch global:trans(LockId, Fun, Nodes, -1)),
    ?line {'EXIT', _} = (catch global:trans(LockId, Fun, Nodes, a)),
    ?line ok = global:trans(LockId, Fun, Nodes, 0),

    write_high_level_trace(Config),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

otp_6931(suite) -> [];
otp_6931(doc) -> ["OTP-6931. Ignore nodeup when connect_all=false."];
otp_6931(Config) when is_list(Config) ->
    Me = self(),
    ?line {ok, CAf} = start_non_connecting_node(ca_false, Config),
    ?line ok = rpc:call(CAf, error_logger, add_report_handler, [?MODULE, Me]),
    ?line info = rpc:call(CAf, error_logger, warning_map, []),
    ?line {global_name_server,CAf} ! {nodeup, fake_node},
    timer:sleep(100),
    stop_node(CAf),
    receive {nodeup,fake_node} -> test_server:fail({info_report, was, sent})
    after 1000 -> ok
    end,
    ok.

%%%-----------------------------------------------------------------
%%% Testing a disconnected node. Not two partitions.
%%%-----------------------------------------------------------------
simple_disconnect(suite) -> [];
simple_disconnect(doc) -> ["OTP-5563. Disconnected nodes (not partitions)"];
simple_disconnect(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    %% Three nodes (test_server, n_1, n_2). 
    ?line [Cp1, Cp2] = Cps = start_nodes([n_1, n_2], peer, Config),
    ?line wait_for_ready_net(Config),

    Nodes = lists:sort([node() | Cps]),

    lists:foreach(fun(N) -> rpc:call(N, ?MODULE, start_tracer, []) end,Nodes),

    Name = name,
    Resolver = {no_module, resolve_none}, % will never be called
    PingNode = Cp2,

    ?line {_Pid1, yes} = 
        rpc:call(Cp1, ?MODULE, start_resolver, [Name, Resolver]),
    test_server:sleep(100),

    %% Disconnect test_server and Cp2. 
    ?line true = erlang:disconnect_node(Cp2),
    test_server:sleep(500),

    %% _Pid is registered on Cp1. The exchange of names between Cp2 and
    %% test_server sees two identical pids.
    ?line pong = net_adm:ping(PingNode),
    ?line ?UNTIL(Cps =:= lists:sort(nodes())),

    ?line {_, Trace0} = collect_tracers(Nodes),
    ?line Resolvers = [P || {_Node,new_resolver,{pid,P}} <- Trace0],
    ?line lists:foreach(fun(P) -> P ! die end, Resolvers),
    ?line lists:foreach(fun(P) -> wait_for_exit(P) end, Resolvers),
    ?line check_everywhere(Nodes, Name, Config),
    ?line undefined = global:whereis_name(Name),

    ?line {_, Trace1} = collect_tracers(Nodes),
    Trace = Trace0 ++ Trace1, 
    ?line [] = [foo || {_, resolve_none, _, _} <- Trace],

    ?line Gs = name_servers(Nodes),
    ?line [_, _, _] = monitored_by_node(Trace, Gs),

    lists:foreach(fun(N) -> rpc:call(N, ?MODULE, stop_tracer, []) end, Nodes),

    ?line OrigNames = global:registered_names(),
    write_high_level_trace(Config),
    stop_nodes(Cps),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%% Not used right now.
simple_dis(Nodes0, Name, Resolver, Config) ->
    Nodes = [node() | Nodes0],
    NN = lists:zip(Nodes, lists:seq(1, length(Nodes))),
    [{_Node,Other} | Dis] = 
        [{N,[N1 || {N1,I1} <- NN, I1 > I + 1]} || {N,I} <- NN],
    lists:foreach(
      fun({Node, DisNodes}) -> 
              Args = [Node, DisNodes, Name, Resolver],
              ok = rpc:call(Node, ?MODULE, simple_dis_node, Args)
      end, Dis),
    ok = simple_dis_node(node(), Other, Name, Resolver, Config).

simple_dis_node(_Node, DisNodes, _Name, _Resolver, Config) ->
    lists:foreach(
      fun(OtherNode) -> _ = erlang:disconnect_node(OtherNode) end, DisNodes),
    ?line ?UNTIL(DisNodes -- nodes() =:= DisNodes),
    ok.



%%%-----------------------------------------------------------------
%%% Testing resolve of name. Many combinations with four nodes.
%%%-----------------------------------------------------------------
-record(cf, {
          link,  % node expected to have registered process running
          ping,  % node in partition 2 to be pinged
          n1,    % node starting registered process in partition 1
          n2,    % node starting registered process in partition 2
          nodes, % nodes expected to exist after ping
          n_res, % expected number of resolvers after ping
          config
         }).

-define(RES(F), {F, fun ?MODULE:F/3}).

simple_resolve(suite) -> [];
simple_resolve(doc) -> ["OTP-5563. Partitions and names."];
simple_resolve(Config) when is_list(Config) ->
    Timeout = 360,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [N1, A2, Z2] = Cps = start_nodes([n_1, a_2, z_2], peer, Config),
    Nodes = lists:sort([node() | Cps]),
    ?line wait_for_ready_net(Config),
    
    lists:foreach(fun(N) -> 
                          rpc:call(N, ?MODULE, start_tracer, [])
                  end, Nodes),

    %% There used to be a link between global_name_server and the
    %% registered name. Now there are only monitors, but the field
    %% name 'link' remains...

    Cf = #cf{link = none, ping = A2, n1 = node(), n2 = A2,
             nodes = [node(), N1, A2, Z2], n_res = 2, config = Config},

    %% There is no test with a resolver that deletes a pid (like
    %% global_exit_name does). The resulting DOWN signal just clears
    %% out the pid from the tables, which should be harmless. So all
    %% tests are done with resolvers that keep both processes. This
    %% should catch all cases which used to result in bogus process
    %% links (now: only monitors are used).

    %% Two partitions are created in each case below: [node(), n_1]
    %% and [a_2, z_2]. A name ('name') is registered in both
    %% partitions whereafter node() or n_1 pings a_2 or z_2. Note that
    %% node() = test_server, which means that node() < z_2 and node()
    %% > a_2. The lesser node calls the resolver.

    %% [The following comment does not apply now that monitors are used.]
    %% The resolver is run on a_2 with the process on node()
    %% as first argument. The process registered as 'name' on a_2 is
    %% removed from the tables. It is unlinked from a_2, and the new
    %% process (on node()) is inserted without trying to link to it
    %% (it it known to run on some other node, in the other
    %% partition). The new process is not sent to the other partition
    %% for update since it already exists there.
    res(?RES(resolve_first), Cps, Cf#cf{link = node(), n2 = A2}),
    %% The same, but the z_2 takes the place of a_2.
    res(?RES(resolve_first), Cps, Cf#cf{link = node(), n2 = Z2}),
    %% The resolver is run on test_server. 
    res(?RES(resolve_first), Cps, Cf#cf{link = A2, n2 = A2, ping = Z2}),
    res(?RES(resolve_first), Cps, Cf#cf{link = Z2, n2 = Z2, ping = Z2}),
    %% Now the same tests but with n_1 taking the place of test_server.
    res(?RES(resolve_first), Cps, Cf#cf{link = N1, n1 = N1, n2 = A2}),
    res(?RES(resolve_first), Cps, Cf#cf{link = N1, n1 = N1, n2 = Z2}),
    res(?RES(resolve_first), Cps, Cf#cf{link = A2, n1 = N1, n2 = A2, ping = Z2}),
    res(?RES(resolve_first), Cps, Cf#cf{link = Z2, n1 = N1, n2 = Z2, ping = Z2}),

    %% [Maybe this set of tests is the same as (ismorphic to?) the last one.]
    %% The resolver is run on a_2 with the process on node()
    %% as first argument. The process registered as 'name' on a_2 is
    %% the one kept. The old process is unlinked on node(), and the
    %% new process (on a_2) is inserted without trying to link to it
    %% (it it known to run on some other node).
    res(?RES(resolve_second), Cps, Cf#cf{link = A2, n2 = A2}),
    %% The same, but the z_2 takes the place of a_2.
    res(?RES(resolve_second), Cps, Cf#cf{link = Z2, n2 = Z2}),
    %% The resolver is run on test_server. 
    res(?RES(resolve_second), Cps, Cf#cf{link = node(), n2 = A2, ping = Z2}),
    res(?RES(resolve_second), Cps, Cf#cf{link = node(), n2 = Z2, ping = Z2}),
    %% Now the same tests but with n_1 taking the place of test_server.
    res(?RES(resolve_second), Cps, Cf#cf{link = A2, n1 = N1, n2 = A2}),
    res(?RES(resolve_second), Cps, Cf#cf{link = Z2, n1 = N1, n2 = Z2}),
    res(?RES(resolve_second), Cps, Cf#cf{link = N1, n1 = N1, n2 = A2, ping = Z2}),
    res(?RES(resolve_second), Cps, Cf#cf{link = N1, n1 = N1, n2 = Z2, ping = Z2}),

    %% A resolver that does not return one of the pids.
    res(?RES(bad_resolver), Cps, Cf#cf{n2 = A2}),
    res(?RES(bad_resolver), Cps, Cf#cf{n2 = Z2}),
    %% The resolver is run on test_server. 
    res(?RES(bad_resolver), Cps, Cf#cf{n2 = A2, ping = Z2}),
    res(?RES(bad_resolver), Cps, Cf#cf{n2 = Z2, ping = Z2}),
    %% Now the same tests but with n_1 taking the place of test_server.
    res(?RES(bad_resolver), Cps, Cf#cf{n1 = N1, n2 = A2}),
    res(?RES(bad_resolver), Cps, Cf#cf{n1 = N1, n2 = Z2}),
    res(?RES(bad_resolver), Cps, Cf#cf{n1 = N1, n2 = A2, ping = Z2}),
    res(?RES(bad_resolver), Cps, Cf#cf{n1 = N1, n2 = Z2, ping = Z2}),

    %% Both processes are unlinked (demonitored).
    res(?RES(resolve_none), Cps, Cf#cf{n2 = A2}),
    res(?RES(resolve_none), Cps, Cf#cf{n2 = Z2}),
    res(?RES(resolve_none), Cps, Cf#cf{n2 = A2, ping = Z2}),
    res(?RES(resolve_none), Cps, Cf#cf{n2 = Z2, ping = Z2}),
    res(?RES(resolve_none), Cps, Cf#cf{n1 = N1, n2 = A2}),
    res(?RES(resolve_none), Cps, Cf#cf{n1 = N1, n2 = Z2}),
    res(?RES(resolve_none), Cps, Cf#cf{n1 = N1, n2 = A2, ping = Z2}),
    res(?RES(resolve_none), Cps, Cf#cf{n1 = N1, n2 = Z2, ping = Z2}),

    %% A resolver faking badrpc. The resolver is run on a_2, and the
    %% process on node() is kept.
    res(?RES(badrpc_resolver), Cps, Cf#cf{link = node(), n2 = A2}),

    %% An exiting resolver. A kind of badrpc.
    res(?RES(exit_resolver), Cps, Cf#cf{link = node(), n2 = A2}),
    res(?RES(exit_resolver), Cps, Cf#cf{link = node(), n2 = Z2}),
    res(?RES(exit_resolver), Cps, Cf#cf{link = A2, n2 = A2, ping = Z2}),
    res(?RES(exit_resolver), Cps, Cf#cf{link = Z2, n2 = Z2, ping = Z2}),
    res(?RES(exit_resolver), Cps, Cf#cf{link = N1, n1 = N1, n2 = A2}),
    res(?RES(exit_resolver), Cps, Cf#cf{link = N1, n1 = N1, n2 = Z2}),
    res(?RES(exit_resolver), Cps, Cf#cf{link = A2, n1 = N1, n2 = A2, ping = Z2}),
    res(?RES(exit_resolver), Cps, Cf#cf{link = Z2, n1 = N1, n2 = Z2, ping = Z2}),

    %% A locker that takes a lock. It used to be that the
    %% global_name_server was busy exchanging names, which caused a
    %% deadlock.
    res(?RES(lock_resolver), Cps, Cf#cf{link = node()}),

    %% A resolver that disconnects from the node of the first pid
    %% once. The nodedown message is processed (the resolver killed),
    %% then a new attempt (nodeup etc.) is made. This time the
    %% resolver does not disconnect any node.
    res(?RES(disconnect_first), Cps, Cf#cf{link = Z2, n2 = Z2,
                                     nodes = [node(), N1, A2, Z2]}),

    ?line lists:foreach(fun(N) -> 
                                rpc:call(N, ?MODULE, stop_tracer, [])
                        end, Nodes),

    ?line OrigNames = global:registered_names(),
    write_high_level_trace(Config),
    stop_nodes(Cps),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

simple_resolve2(suite) -> [];
simple_resolve2(doc) -> ["OTP-5563. Partitions and names."];
simple_resolve2(Config) when is_list(Config) ->
    %% Continuation of simple_resolve. Of some reason it did not
    %% always work to re-start z_2. "Cannot be a global bug."

    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [N1, A2, Z2] = Cps = start_nodes([n_1, a_2, z_2], peer, Config),
    ?line wait_for_ready_net(Config),
    Nodes = lists:sort([node() | Cps]),
    
    lists:foreach(fun(N) -> 
                          rpc:call(N, ?MODULE, start_tracer, [])
                  end, Nodes),

    Cf = #cf{link = none, ping = A2, n1 = node(), n2 = A2,
             nodes = [node(), N1, A2, Z2], n_res = 2, config = Config},

    %% Halt z_2. 
    res(?RES(halt_second), Cps, Cf#cf{link = N1, n1 = N1, n2 = Z2, ping  = A2,
                                nodes = [node(), N1, A2], n_res = 1}),

    ?line lists:foreach(fun(N) -> 
                                rpc:call(N, ?MODULE, stop_tracer, [])
                        end, Nodes),

    ?line OrigNames = global:registered_names(),
    write_high_level_trace(Config),
    stop_nodes(Cps), % Not all nodes may be present, but it works anyway.
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

simple_resolve3(suite) -> [];
simple_resolve3(doc) -> ["OTP-5563. Partitions and names."];
simple_resolve3(Config) when is_list(Config) ->
    %% Continuation of simple_resolve.

    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [N1, A2, Z2] = Cps = start_nodes([n_1, a_2, z_2], peer, Config),
    ?line wait_for_ready_net(Config),
    Nodes = lists:sort([node() | Cps]),
    
    lists:foreach(fun(N) -> 
                          rpc:call(N, ?MODULE, start_tracer, [])
                  end, Nodes),

    Cf = #cf{link = none, ping = A2, n1 = node(), n2 = A2,
             nodes = [node(), N1, A2, Z2], n_res = 2, config = Config},

    %% Halt a_2. 
    res(?RES(halt_second), Cps, Cf#cf{link = node(), n2 = A2, 
                                      nodes = [node(), N1], n_res = 1}),
    
    ?line lists:foreach(fun(N) -> 
                                rpc:call(N, ?MODULE, stop_tracer, [])
                        end, Nodes),

    ?line OrigNames = global:registered_names(),
    write_high_level_trace(Config),
    stop_nodes(Cps), % Not all nodes may be present, but it works anyway.
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

res({Res,Resolver}, [N1, A2, Z2], Cf) ->
    %% Note: there are no links anymore, but monitors.
    #cf{link = LinkedNode, ping = PingNode, n1 = Res1, n2 = OtherNode,
        nodes = Nodes0, n_res = NRes, config = Config} = Cf,
    ?t:format("~n~nResolver: ~p", [Res]),
    ?t:format(" Registered on partition 1:  ~p", [Res1]),
    ?t:format(" Registered on partition 2:  ~p", [OtherNode]),
    ?t:format(" Pinged node:                ~p", [PingNode]),
    ?t:format(" Linked node:                ~p", [LinkedNode]),
    ?t:format(" Expected # resolvers:       ~p", [NRes]),
    Nodes = lists:sort(Nodes0),
    T1 = node(),
    Part1 = [T1, N1],
    Part2 = [A2, Z2],
    Name = name,

    %% A registered name is resolved in different scenarios with just
    %% four nodes. In each scenario it is checked that exactly the
    %% expected monitors remain between registered processes and the
    %% global_name_server.

    ?line rpc_cast(OtherNode, 
                   ?MODULE, 
                   part_2_2, 
                   [Config, Part1, Part2, [{Name, Resolver}]]),
    ?line ?UNTIL(is_ready_partition(Config)),
    ?line {_Pid1, yes} = 
        rpc:call(Res1, ?MODULE, start_resolver, [Name, Resolver]),

    ?line pong = net_adm:ping(PingNode),
    ?line wait_for_ready_net(Nodes, Config),

    ?line check_everywhere(Nodes, Name, Config),
    ?line case global:whereis_name(Name) of
              undefined when LinkedNode =:= none -> ok;
              Pid -> assert_pid(Pid)
          end,

    ?line {_, Trace0} = collect_tracers(Nodes),
    ?line Resolvers = [P || {_Node,new_resolver,{pid,P}} <- Trace0],

    ?line NRes = length(Resolvers),

    %% Wait for extra monitor processes to be created.
    %% This applies as long as global:do_monitor/1 spawns processes.
    %% (Some day monitor() will be truly synchronous.)
    test_server:sleep(100),

    ?line lists:foreach(fun(P) -> P ! die end, Resolvers),
    ?line lists:foreach(fun(P) -> wait_for_exit(P) end, Resolvers),

    ?line check_everywhere(Nodes, Name, Config),
    ?line undefined = global:whereis_name(Name),

    %% Wait for monitors to remove names.
    test_server:sleep(100),

    ?line {_, Trace1} = collect_tracers(Nodes),
    Trace = Trace0 ++ Trace1, 

    ?line Gs = name_servers([T1, N1, A2, Z2]),
    ?line MonitoredByNode = monitored_by_node(Trace, Gs),
    ?line MonitoredBy = [M || {_N,M} <- MonitoredByNode],
  
    X = MonitoredBy -- Gs,
    LengthGs = length(Gs),
    ?line case MonitoredBy of
              [] when LinkedNode =:= none -> ok;
              Gs -> ok;
              _ when LengthGs < 4, X =:= [] -> ok;
              _ -> ?t:format("ERROR:~nMonitoredBy ~p~n"
                             "global_name_servers ~p~n", 
                             [MonitoredByNode, Gs]),
                   ?t:fail(monitor_mismatch)
          end,
    ok.

name_servers(Nodes) ->
    lists:sort([rpc:call(N, erlang, whereis, [global_name_server]) || 
                   N <- Nodes,
                   pong =:= net_adm:ping(N)]).
    
monitored_by_node(Trace, Servers) ->
    lists:sort([{node(M),M} || 
                   {_Node,_P,died,{monitors_2levels,ML}} <- Trace, 
                   M <- ML,
                   lists:member(M, Servers)]).

%% Runs on a node in Part2
part_2_2(Config, Part1, Part2, NameResolvers) ->
    make_partition(Config, Part1, Part2),
    lists:foreach
      (fun({Name, Resolver}) ->
               ?line {Pid2, yes} = start_resolver(Name, Resolver),
               trace_message({node(), part_2_2, nodes(), {pid2,Pid2}})
       end, NameResolvers).

resolve_first(name, Pid1, _Pid2) ->
    Pid1.

resolve_second(name, _Pid1, Pid2) ->
    Pid2.

resolve_none(name, _Pid1, _Pid2) ->
    none.

bad_resolver(name, _Pid1, _Pid2) ->
    bad_answer.

badrpc_resolver(name, _Pid1, _Pid2) ->
    {badrpc, badrpc}.

exit_resolver(name, _Pid1, _Pid2) ->
    erlang:error(bad_resolver).

lock_resolver(name, Pid1, _Pid2) ->
    Id = {?MODULE, self()},
    Nodes = [node()],
    ?line true = global:set_lock(Id, Nodes),
    _ = global:del_lock(Id, Nodes),
    Pid1.

disconnect_first(name, Pid1, Pid2) ->
    Name = disconnect_first_name,
    case whereis(Name) of
        undefined -> 
            spawn(fun() -> disconnect_first_name(Name) end),
            true = erlang:disconnect_node(node(Pid1));
        Pid when is_pid(Pid) ->
            Pid ! die
    end,
    Pid2.

disconnect_first_name(Name) ->
    register(Name, self()),
    receive die -> ok end.

halt_second(name, _Pid1, Pid2) ->
    rpc:call(node(Pid2), erlang, halt, []),
    Pid2.

start_resolver(Name, Resolver) ->
    Self = self(), 
    Pid = spawn(fun() -> init_resolver(Self, Name, Resolver) end),
    trace_message({node(), new_resolver, {pid, Pid}}),
    receive
	{Pid, Res} -> {Pid, Res}
    end.
    
init_resolver(Parent, Name, Resolver) ->
    X = global:register_name(Name, self(), Resolver),
    Parent ! {self(), X},
    loop_resolver().

loop_resolver() ->
    receive
        die ->
            trace_message({node(), self(), died, mon_by_servers(self())}),
            exit(normal)
    end.

%% The server sometimes uses an extra process for monitoring. 
%% The server monitors that extra process.
mon_by_servers(Proc) ->
    {monitored_by, ML} = process_info(Proc, monitored_by),
    {monitors_2levels, 
     lists:append([ML | 
                   [begin 
                        {monitored_by, MML} = rpc:call(node(M), 
                                                       erlang, 
                                                       process_info, 
                                                       [M, monitored_by]),
                        MML
                    end || M <- ML]])}.

-define(REGNAME, contact_a_2).

leftover_name(suite) -> [];
leftover_name(doc) -> ["OTP-5563. Bug: nodedown while synching."];
leftover_name(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),
    ?line [N1, A2, Z2] = Cps = start_nodes([n_1, a_2, z_2], peer,  Config),
    Nodes = lists:sort([node() | Cps]),
    ?line wait_for_ready_net(Config),
    
    lists:foreach(fun(N) -> 
                          rpc:call(N, ?MODULE, start_tracer, [])
                  end, Nodes),

    Name = name, % registered on a_2
    ResName = resolved_name, % registered on n_1 and a_2
    %% 
    ?line _Pid = ping_a_2_fun(?REGNAME, N1, A2),

    T1 = node(),
    Part1 = [T1, N1],
    Part2 = [A2, Z2],
    NoResolver = {no_module, resolve_none},
    Resolver = fun contact_a_2/3,
    ?line rpc_cast(A2, 
                   ?MODULE, part_2_2, [Config,
                                       Part1, 
                                       Part2, 
                                       [{Name, NoResolver},
                                        {ResName, Resolver}]]),
    ?line ?UNTIL(is_ready_partition(Config)),

    %% resolved_name is resolved to run on a_2, an insert operation is
    %% sent to n_1. The resolver function halts a_2, but the nodedown
    %% message is handled by n_1 _before_ the insert operation is run
    %% (at least every now and then; sometimes it seems to be
    %% delayed). Unless "artificial" nodedown messages are sent the
    %% name would linger on indefinitely. [There is no test case for
    %% the situation that no nodedown message at all is sent.]
    ?line {_Pid1, yes} = 
        rpc:call(N1, ?MODULE, start_resolver, 
                 [ResName, fun contact_a_2/3]),
    test_server:sleep(1000),

    ?line trace_message({node(), pinging, z_2}),
    ?line pong = net_adm:ping(Z2),
    ?line ?UNTIL((Nodes -- [A2]) =:= lists:sort(?NODES)),
    ?t:sleep(1000),

    ?line {_,Trace0} = collect_tracers(Nodes),

    ?line Resolvers = [P || {_Node,new_resolver,{pid,P}} <- Trace0],
    ?line lists:foreach(fun(P) -> P ! die end, Resolvers),
    ?line lists:foreach(fun(P) -> wait_for_exit(P) end, Resolvers),

    ?line lists:foreach(fun(N) -> 
                                rpc:call(N, ?MODULE, stop_tracer, [])
                        end, Nodes),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),
    write_high_level_trace(Config),
    stop_nodes(Cps),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%% Runs on n_1
contact_a_2(resolved_name, Pid1, Pid2) ->
    trace_message({node(), ?REGNAME, {pid1,Pid1}, {pid2,Pid2}, 
                  {node1,node(Pid1)}, {node2,node(Pid2)}}),
    ?REGNAME ! doit,
    Pid2.

ping_a_2_fun(RegName, N1, A2) ->
    spawn(N1, fun() -> ping_a_2(RegName, N1, A2) end).

ping_a_2(RegName, N1, A2) ->
    register(RegName, self()),
    receive doit -> 
            trace_message({node(), ping_a_2, {a2, A2}}),
            monitor_node(A2, true),
            %% Establish contact with a_2, then take it down.
            rpc:call(N1, ?MODULE, halt_node, [A2]),
            receive
                {nodedown, A2} -> ok
            end
    end.
                     
halt_node(Node) ->
    rpc:call(Node, erlang, halt, []).

%%%-----------------------------------------------------------------
%%% Testing re-registration of a name.
%%%-----------------------------------------------------------------
re_register_name(suite) -> [];
re_register_name(doc) -> ["OTP-5563. Name is re-registered."];
re_register_name(Config) when is_list(Config) ->
    %% When re-registering a name the link to the old pid used to
    %% linger on. Don't think is was a serious bug though--some memory
    %% occupied by links, that's all.
    %% Later: now monitors are checked.
    Timeout = 15,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    Me = self(),
    Pid1 = spawn(fun() -> proc(Me) end),
    ?line yes = global:register_name(name, Pid1),
    Pid2 = spawn(fun() -> proc(Me) end),
    ?line _ = global:re_register_name(name, Pid2),
    Pid2 ! die,
    Pid1 ! die,
    receive {Pid1, MonitoredBy1} -> [] = MonitoredBy1 end,
    receive {Pid2, MonitoredBy2} -> [_] = MonitoredBy2 end,
    ?line _ = global:unregister_name(name),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

proc(Parent) ->
    receive die -> ok end,
    {monitored_by, MonitoredBy} = process_info(self(), monitored_by),
    Parent ! {self(), MonitoredBy}.


%%%-----------------------------------------------------------------
%%% 
%%%-----------------------------------------------------------------
name_exit(suite) -> [];
name_exit(doc) -> ["OTP-5563. Registered process dies."];
name_exit(Config) when is_list(Config) ->
    StartFun = fun() ->
                       {ok, N1} = start_node_rel(n_1, this, Config),
                       {ok, N2} = start_node_rel(n_2, this, Config),
                       [N1, N2]
               end,
    ?t:format("Test of current release~n"),    
    do_name_exit(StartFun, current, Config).

do_name_exit(StartFun, Version, Config) ->
    %% When a registered process dies, the node where it is registered
    %% removes the name from the table immediately, and then removes
    %% it from other nodes using a lock.
    %% This is perhaps not how it should work, but it is not easy to
    %% change.
    %% See also OTP-3737.
    %%
    %% The current release uses monitors so this test is not so relevant.

    Timeout = 60,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    %% Three nodes (test_server, n_1, n_2). 
    ?line Cps = StartFun(),
    Nodes = lists:sort([node() | Cps]),
    ?line wait_for_ready_net(Config),
    lists:foreach(fun(N) -> rpc:call(N, ?MODULE, start_tracer, []) end,Nodes),

    Name = name,
    ?line {Pid, yes} = start_proc(Name),

    Me = self(),
    LL = spawn(fun() -> long_lock(Me) end),
    receive 
        long_lock_taken -> ok
    end,

    Pid ! die,                    
    wait_for_exit_fast(Pid),

    ?t:sleep(100),
    %% Name has been removed from node()'s table, but nowhere else
    %% since there is a lock on 'global'.
    {R1,[]} = rpc:multicall(Nodes, global, whereis_name, [Name]),
    ?line case Version of
              old -> [_,_] = lists:usort(R1);
              current -> [undefined, undefined, undefined] = R1
          end,
    ?t:sleep(3000),
    ?line check_everywhere(Nodes, Name, Config),

    lists:foreach(fun(N) -> rpc:call(N, ?MODULE, stop_tracer, []) end, Nodes),
    ?line OrigNames = global:registered_names(),
    exit(LL, kill),
    write_high_level_trace(Config),
    stop_nodes(Cps),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

long_lock(Parent) ->
    global:trans({?GLOBAL_LOCK,self()}, 
                 fun() -> 
                         Parent ! long_lock_taken,
                         timer:sleep(3000) 
                 end).

%%%-----------------------------------------------------------------
%%% Testing the support for external nodes (cnodes)
%%%-----------------------------------------------------------------
external_nodes(suite) -> [];
external_nodes(doc) -> ["OTP-5563. External nodes (cnodes)."];
external_nodes(Config) when is_list(Config) ->
    Timeout = 30,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    ?line [NodeB, NodeC] = start_nodes([b, c], peer, Config),
    ?line wait_for_ready_net(Config),

    %% Nodes = ?NODES,
    %% lists:foreach(fun(N) -> rpc:call(N, ?MODULE, start_tracer, []) end,
    %%               Nodes),
    Name = name,

    %% Two partitions: [test_server] and [b, c].
    %% c registers an external name on b
    ?line rpc_cast(NodeB, ?MODULE, part_ext, 
                   [Config, node(), NodeC, Name]),
    ?line ?UNTIL(is_ready_partition(Config)),

    ?line pong = net_adm:ping(NodeB),
    ?line ?UNTIL([NodeB, NodeC] =:= lists:sort(nodes())),
    ?line wait_for_ready_net(Config),

    ?line Cpid = rpc:call(NodeC, erlang, whereis, [Name]),
    ExternalName = [{name,Cpid,NodeB}],
    ?line ExternalName = get_ext_names(),
    ?line ExternalName = rpc:call(NodeB, gen_server, call, 
                                  [global_name_server, get_names_ext]),
    ?line ExternalName = rpc:call(NodeC, gen_server, call, 
                                  [global_name_server, get_names_ext]),

    ?line [_] = cnode_links(Cpid),
    ?line [_,_,_] = cnode_monitored_by(Cpid),
    ?line no = global:register_name(Name, self()),
    ?line yes = global:re_register_name(Name, self()),
    ?line ?UNTIL([] =:= cnode_monitored_by(Cpid)),
    ?line ?UNTIL([] =:= cnode_links(Cpid)),
    ?line [] = gen_server:call(global_name_server, get_names_ext, infinity),

    ?line Cpid ! {register, self(), Name},
    ?line receive {Cpid, Reply1} -> no = Reply1 end,
    ?line _ = global:unregister_name(Name),
    test_server:sleep(1000),
    ?line Cpid ! {register, self(), Name},
    ?line ?UNTIL(length(get_ext_names()) =:= 1),
    ?line receive {Cpid, Reply2} -> yes = Reply2 end,

    ?line Cpid ! {unregister, self(), Name},
    ?line ?UNTIL(length(get_ext_names()) =:= 0),
    ?line receive {Cpid, Reply3} -> ok = Reply3 end,

    Cpid ! die,
    ?line ?UNTIL(OrigNames =:= global:registered_names()),
    ?line [] = get_ext_names(),
    ?line [] = rpc:call(NodeB, gen_server, call, 
                        [global_name_server, get_names_ext]),
    ?line [] = rpc:call(NodeC, gen_server, call, 
                        [global_name_server, get_names_ext]),

    ?line Cpid2 = erlang:spawn(NodeC, fun() -> cnode_proc(NodeB) end),
    ?line Cpid2 ! {register, self(), Name},
    ?line receive {Cpid2, Reply4} -> yes = Reply4 end,

    %% It could be a bug that Cpid2 is linked to 'global_name_server'
    %% at node 'b'. The effect: Cpid2 dies when node 'b' crashes.
    stop_node(NodeB),
    ?line ?UNTIL(OrigNames =:= global:registered_names()),
    ?line [] = get_ext_names(),
    ?line [] = rpc:call(NodeC, gen_server, call, 
                        [global_name_server, get_names_ext]),

    %% ?line {_, Trace} = collect_tracers(Nodes),
    %% lists:foreach(fun(M) -> erlang:display(M) end, Trace),

    ThisNode = node(),
    ?line Cpid3 = erlang:spawn(NodeC, fun() -> cnode_proc(ThisNode) end),
    ?line Cpid3 ! {register, self(), Name},
    ?line receive {Cpid3, Reply5} -> yes = Reply5 end,

    ?line ?UNTIL(length(get_ext_names()) =:= 1),
    stop_node(NodeC),
    ?line ?UNTIL(length(get_ext_names()) =:= 0),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

get_ext_names() ->
    gen_server:call(global_name_server, get_names_ext, infinity).

%% Runs at B
part_ext(Config, Main, C, Name) ->
    make_partition(Config, [Main], [node(), C]),
    ThisNode = node(),
    Pid = erlang:spawn(C, fun() -> cnode_proc(ThisNode) end),
    Pid ! {register, self(), Name},
    receive {Pid, Reply} -> yes = Reply end,
    rpc:call(C, erlang, register, [Name, Pid]).

cnode_links(Pid) ->
    Pid ! {links, self()},
    receive 
        {links, Links} ->
            Links
    end.

cnode_monitored_by(Pid) ->
    Pid ! {monitored_by, self()},
    receive 
        {monitored_by, MonitoredBy} ->
            MonitoredBy
    end.

cnode_proc(E) ->
    receive
        {register, From, Name} ->
            Rep = rpc:call(E, global, register_name_external, [Name, self()]),
            From ! {self(), Rep};
        {unregister, From, Name} ->
            _ = rpc:call(E, global, unregister_name_external, [Name]),
            From ! {self(), ok};
        {links, From} ->
            From ! process_info(self(), links);
        {monitored_by, From} ->
            From ! process_info(self(), monitored_by);
        die ->
            exit(normal)
    end,
    cnode_proc(E).


many_nodes(suite) ->
    [];
many_nodes(doc) ->
    ["OTP-5770. Start many nodes. Make them connect at the same time."];
many_nodes(Config) when is_list(Config) ->
    Timeout = 180,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),

    {Rels, N_cps} = 
        case ?t:os_type() of
            {unix, Osname} when Osname =:= linux; 
                                Osname =:= openbsd; 
                                Osname =:= darwin ->
                N_nodes = quite_a_few_nodes(32),
                {node_rel(1, N_nodes, this), N_nodes};
            {unix, _} ->
                {node_rel(1, 32, this), 32};
            _ -> 
                {node_rel(1, 32, this), 32}
        end,
    ?line Cps = [begin {ok, Cp} = start_node_rel(Name, Rel, Config), Cp end ||
                    {Name,Rel} <- Rels],
    Nodes = lists:sort(?NODES),
    ?line wait_for_ready_net(Nodes, Config),

    ?line Dir = ?config(priv_dir, Config),
    GoFile = filename:join([Dir, "go.txt"]),
    file:delete(GoFile),

    CpsFiles = [{N, filename:join([Dir, atom_to_list(N)++".node"])} ||
                   N <- Cps],
    IsoFun = 
        fun({N, File}) -> 
                file:delete(File),
                rpc_cast(N, ?MODULE, isolated_node, [File, GoFile, Cps, Config])
        end,
    ?line lists:foreach(IsoFun, CpsFiles),
    
    ?line all_nodes_files(CpsFiles, "isolated", Config),
    ?line Time = msec(),
    ?line sync_until(),
    erlang:display(ready_to_go),
    ?line touch(GoFile, "go"),
    ?line all_nodes_files(CpsFiles, "done", Config),
    ?line Time2 = msec(),

    ?line lists:foreach(fun(N) -> pong = net_adm:ping(N) end, Cps),

    ?line wait_for_ready_net(Config),

    write_high_level_trace(Config), % The test succeeded, but was it slow?

    ?line lists:foreach(fun({_N, File}) -> file:delete(File) end, CpsFiles),
    ?line file:delete(GoFile),

    ?line ?UNTIL(OrigNames =:= global:registered_names()),
    write_high_level_trace(Config),
    ?line stop_nodes(Cps),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    Diff = Time2 - Time,
    Return = lists:flatten(io_lib:format("~w nodes took ~w ms", 
                                         [N_cps, Diff])),
    erlang:display({{nodes,N_cps},{time,Diff}}),
    ?t:format("~s~n", [Return]),
    {comment, Return}.

node_rel(From, To, Rel) ->
    [{lists:concat([cp, N]), Rel} || N <- lists:seq(From, To)].

isolated_node(File, GoFile, Nodes, Config) ->
    Ns = lists:sort(Nodes),
    exit(erlang:whereis(user), kill),
    touch(File, "start_isolated"),
    NodesList = nodes(),
    append_to_file(File, [{nodes,Nodes},{nodes_list,NodesList}]),
    Replies = 
        lists:map(fun(N) -> _ = erlang:disconnect_node(N) end, NodesList),
    append_to_file(File, {replies,Replies}),
    ?UNTIL(begin
               Known = get_known(node()),
               append_to_file(File, {known,Known}),
               Known =:= [node()]
           end),
    touch(File, "isolated"),
    sync_until(File),
    file_contents(GoFile, "go", Config, File),
    touch(File, "got_go"),
    lists:foreach(fun(N) -> _ = net_adm:ping(N) end, shuffle(Nodes)),
    touch(File, "pinged"),
    ?line ?UNTIL((Ns -- get_known(node())) =:= []),
    touch(File, "done").

touch(File, List) ->
    ok = file:write_file(File, list_to_binary(List)).

append_to_file(File, Term) ->
    {ok, Fd} = file:open(File, [raw,binary,append]),
    ok = file:write(Fd, io_lib:format("~p.~n", [Term])),
    ok = file:close(Fd).

all_nodes_files(CpsFiles, ContentsList, Config) ->
    lists:all(fun({_N,File}) ->
                      file_contents(File, ContentsList, Config)
              end, CpsFiles).

file_contents(File, ContentsList, Config) ->
    file_contents(File, ContentsList, Config, no_log_file).

file_contents(File, ContentsList, Config, LogFile) ->
    Contents = list_to_binary(ContentsList),    
    Sz = size(Contents),
    ?UNTIL(begin
               case file:read_file(File) of
                   {ok, FileContents}=Reply -> 
                       case catch split_binary(FileContents, Sz) of
                           {Contents,_} ->
                               true;
                           _ ->
                               catch append_to_file(LogFile,
                                                    {File,Contents,Reply}),
                               false
                       end;
                   Reply ->
                       catch append_to_file(LogFile, {File, Contents, Reply}),
                       false
               end
           end).

sync_until() ->
    sync_until(no_log_file).

sync_until(LogFile) ->
    Time = ?UNTIL_LOOP - (msec(now()) rem ?UNTIL_LOOP),
    catch append_to_file(LogFile, {sync_until, Time}),
    timer:sleep(Time).

shuffle(L) ->
    [E || {_, E} <- lists:keysort(1, [{random:uniform(), E} || E <- L])].

sync_0(suite) -> [];
sync_0(doc) ->
    ["OTP-5770. sync/0."];
sync_0(Config) when is_list(Config) ->
    Timeout = 180,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    

    N_cps = 
        case ?t:os_type() of
            {unix, Osname} when Osname =:= linux; 
                                Osname =:= openbsd; 
                                Osname =:= darwin ->
                quite_a_few_nodes(30);
            {unix, sunos} ->
                30;
            {unix, _} ->
                16;
            _ -> 
                30
        end,

    Names = [lists:concat([cp,N]) || N <- lists:seq(1, N_cps)],
    Cps = start_and_sync(Names),
    ?line wait_for_ready_net(Config),
    write_high_level_trace(Config),
    stop_nodes(Cps),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

start_and_sync([]) ->
    [];
start_and_sync([Name | Names]) ->
    ?line {ok, N} = start_node(Name, slave, []),
    ?line {Time, _Void} = rpc:call(N, timer, tc, [global, sync, []]),
    ?t:format("~p: ~p~n", [Name, Time]),
    [N | start_and_sync(Names)].

%%%-----------------------------------------------------------------
%%% Testing of change of global_groups parameter.
%%%-----------------------------------------------------------------
global_groups_change(suite) -> [];
global_groups_change(doc) -> ["Test change of global_groups parameter."];
global_groups_change(Config) ->
    Timeout = 90,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),
    ?line M = from($@, atom_to_list(node())),

    % Create the .app files and the boot script
    ?line {KernelVer, StdlibVer} = create_script_dc("dc"),
    ?line case is_real_system(KernelVer, StdlibVer) of
	      true ->
		  Options = [];
	      false  ->
		  Options = [local]
	  end,

    ?line ok = systools:make_script("dc", Options),
    
    [Ncp1,Ncp2,Ncp3,Ncp4,Ncp5,NcpA,NcpB,NcpC,NcpD,NcpE] = 
        node_names([cp1,cp2,cp3,cp4,cp5,cpA,cpB,cpC,cpD,cpE], Config),

    % Write config files
    ?line Dir = ?config(priv_dir,Config),
    ?line {ok, Fd_dc} = file:open(filename:join(Dir, "sys.config"), [write]),
    ?line config_dc1(Fd_dc, Ncp1, Ncp2, Ncp3, NcpA, NcpB, NcpC, NcpD, NcpE),
    ?line file:close(Fd_dc),
    ?line Config1 = filename:join(Dir, "sys"),
    
    % Test [cp1, cp2, cp3]
    ?line {ok, Cp1} = start_node_boot(Ncp1, Config1, dc),
    ?line {ok, Cp2} = start_node_boot(Ncp2, Config1, dc),
    ?line {ok, Cp3} = start_node_boot(Ncp3, Config1, dc),
    ?line {ok, CpA} = start_node_boot(NcpA, Config1, dc),
    ?line {ok, CpB} = start_node_boot(NcpB, Config1, dc),
    ?line {ok, CpC} = start_node_boot(NcpC, Config1, dc),
    ?line {ok, CpD} = start_node_boot(NcpD, Config1, dc),
    ?line {ok, CpE} = start_node_boot(NcpE, Config1, dc),

    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp2]),
    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp3]),
    ?line pang = rpc:call(Cp1, net_adm, ping,
                          [list_to_atom(lists:concat(["cp5@", M]))]),
    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp3]),
    ?line pang = rpc:call(Cp2, net_adm, ping,
                          [list_to_atom(lists:concat(["cp5@", M]))]),

    ?line {TestGG4, yes} = rpc:call(CpB, ?MODULE, start_proc, [test]),
    ?line {TestGG5, yes} = rpc:call(CpE, ?MODULE, start_proc, [test]),


    ?line pong = rpc:call(CpA, net_adm, ping, [CpC]),
    ?line pong = rpc:call(CpC, net_adm, ping, [CpB]),
    ?line pong = rpc:call(CpD, net_adm, ping, [CpC]),
    ?line pong = rpc:call(CpE, net_adm, ping, [CpD]),

    ?line
    ?UNTIL(begin
               TestGG4_1 = rpc:call(CpA, global, whereis_name, [test]),
               TestGG4_2 = rpc:call(CpB, global, whereis_name, [test]),
               TestGG4_3 = rpc:call(CpC, global, whereis_name, [test]),

               TestGG5_1 = rpc:call(CpD, global, whereis_name, [test]),
               TestGG5_2 = rpc:call(CpE, global, whereis_name, [test]),
               io:format("~p~n", [[TestGG4, TestGG4_1, TestGG4_2,TestGG4_3]]),
               io:format("~p~n", [[TestGG5, TestGG5_1, TestGG5_2]]),
               (TestGG4_1 =:= TestGG4) and
               (TestGG4_2 =:= TestGG4) and
               (TestGG4_3 =:= TestGG4) and
               (TestGG5_1 =:= TestGG5) and
               (TestGG5_2 =:= TestGG5)
           end),

    ?line ?t:format( "#### nodes() ~p~n",[nodes()]),

    ?line XDcWa1 = rpc:call(Cp1, global_group, info, []),
    ?line XDcWa2 = rpc:call(Cp2, global_group, info, []),
    ?line XDcWa3 = rpc:call(Cp3, global_group, info, []),
    ?line ?t:format( "#### XDcWa1 ~p~n",[XDcWa1]),
    ?line ?t:format( "#### XDcWa2 ~p~n",[XDcWa2]),
    ?line ?t:format( "#### XDcWa3 ~p~n",[XDcWa3]),

    ?line stop_node(CpC),
 
    %% Read the current configuration parameters, and change them
    ?line OldEnv = 
        rpc:call(Cp1, application_controller, prep_config_change, []),
    ?line {value, {kernel, OldKernel}} = lists:keysearch(kernel, 1, OldEnv),

    ?line GG1 = 
        lists:sort([mk_node(Ncp1, M), mk_node(Ncp2, M), mk_node(Ncp5, M)]),
    ?line GG2 = lists:sort([mk_node(Ncp3, M)]),
    ?line GG3 = lists:sort([mk_node(Ncp4, M)]),
    ?line GG4 = lists:sort([mk_node(NcpA, M), mk_node(NcpB, M)]),
    ?line GG5 = 
        lists:sort([mk_node(NcpC, M), mk_node(NcpD, M), mk_node(NcpE, M)]),

    ?line NewNG = {global_groups,[{gg1, normal, GG1},
				  {gg2, normal, GG2},
				  {gg3, normal, GG3},
				  {gg4, normal, GG4},
				  {gg5, hidden, GG5}]},
    
    ?line NewKernel = 
        [{kernel, lists:keyreplace(global_groups, 1, OldKernel, NewNG)}],
    ?line ok = rpc:call(Cp1, application_controller, test_change_apps, 
			[[kernel], [NewKernel]]),
    ?line ok = rpc:call(Cp2, application_controller, test_change_apps, 
			[[kernel], [NewKernel]]),
    ?line ok = rpc:call(Cp3, application_controller, test_change_apps, 
			[[kernel], [NewKernel]]),
    ?line ok = rpc:call(CpA, application_controller, test_change_apps, 
			[[kernel], [NewKernel]]),
    ?line ok = rpc:call(CpB, application_controller, test_change_apps, 
			[[kernel], [NewKernel]]),
    ?line ok = rpc:call(CpD, application_controller, test_change_apps, 
			[[kernel], [NewKernel]]),
    ?line ok = rpc:call(CpE, application_controller, test_change_apps, 
			[[kernel], [NewKernel]]),
    
    ?line ?t:format("####  ~p~n",[multicall]),
    ?line ?t:format( "####  ~p~n",[multicall]),
    %% no idea to check the result from the rpc because the other
    %% nodes will disconnect test server, and thus the result will
    %% always be {badrpc, nodedown}
    ?line rpc:multicall([Cp1, Cp2, Cp3, CpA, CpB, CpD, CpE], 
                        application_controller, config_change, [OldEnv]),

    ?line {ok, Fd_dc2} = file:open(filename:join(Dir, "sys2.config"), [write]),
    ?line config_dc2(Fd_dc2, NewNG, Ncp1, Ncp2, Ncp3),
    ?line file:close(Fd_dc2),
    ?line Config2 = filename:join(Dir, "sys2"),
    ?line {ok, CpC} = start_node_boot(NcpC, Config2, dc),

    ?line sync_and_wait(CpA),
    ?line sync_and_wait(CpD),
    
    ?line pong = rpc:call(CpA, net_adm, ping, [CpC]),
    ?line pong = rpc:call(CpC, net_adm, ping, [CpB]),
    ?line pong = rpc:call(CpD, net_adm, ping, [CpC]),
    ?line pong = rpc:call(CpE, net_adm, ping, [CpD]),
    
    ?line GG5 = 
        lists:sort([mk_node(NcpC, M)|rpc:call(CpC, erlang, nodes, [])]),
    ?line GG5 = 
        lists:sort([mk_node(NcpD, M)|rpc:call(CpD, erlang, nodes, [])]),
    ?line GG5 = 
        lists:sort([mk_node(NcpE, M)|rpc:call(CpE, erlang, nodes, [])]),

    ?line false = 
        lists:member(mk_node(NcpC, M), rpc:call(CpA, erlang, nodes, [])),
    ?line false = 
        lists:member(mk_node(NcpC, M), rpc:call(CpB, erlang, nodes, [])),

    ?line
    ?UNTIL(begin
               TestGG4a = rpc:call(CpA, global, whereis_name, [test]),
               TestGG4b = rpc:call(CpB, global, whereis_name, [test]),

               TestGG5c = rpc:call(CpC, global, whereis_name, [test]),
               TestGG5d = rpc:call(CpD, global, whereis_name, [test]),
               TestGG5e = rpc:call(CpE, global, whereis_name, [test]),
               io:format("~p~n", [[TestGG4, TestGG4a, TestGG4b]]),
               io:format("~p~n", [[TestGG5, TestGG5c, TestGG5d, TestGG5e]]),
               (TestGG4 =:= TestGG4a) and
               (TestGG4 =:= TestGG4b) and
               (TestGG5 =:= TestGG5c) and
               (TestGG5 =:= TestGG5d) and
               (TestGG5 =:= TestGG5e)
           end),

    ?line Info1 = rpc:call(Cp1, global_group, info, []),
    ?line Info2 = rpc:call(Cp2, global_group, info, []),
    ?line Info3 = rpc:call(Cp3, global_group, info, []),
    ?line InfoA = rpc:call(CpA, global_group, info, []),
    ?line InfoB = rpc:call(CpB, global_group, info, []),
    ?line InfoC = rpc:call(CpC, global_group, info, []),
    ?line InfoD = rpc:call(CpD, global_group, info, []),
    ?line InfoE = rpc:call(CpE, global_group, info, []),
    ?line ?t:format( "#### Info1 ~p~n",[Info1]),
    ?line ?t:format( "#### Info2 ~p~n",[Info2]),
    ?line ?t:format( "#### Info3 ~p~n",[Info3]),
    ?line ?t:format( "#### InfoA ~p~n",[InfoA]),
    ?line ?t:format( "#### InfoB ~p~n",[InfoB]),
    ?line ?t:format( "#### InfoC ~p~n",[InfoC]),
    ?line ?t:format( "#### InfoD ~p~n",[InfoD]),
    ?line ?t:format( "#### InfoE ~p~n",[InfoE]),

    ?line {global_groups, GGNodes} = NewNG,

    ?line Info1ok = [{state, synced},
		     {own_group_name, gg1},
		     {own_group_nodes, GG1},
		     {synced_nodes, [mk_node(Ncp2, M)]},
		     {sync_error, []},
		     {no_contact, [mk_node(Ncp5, M)]},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg1, 1, GGNodes))},
		     {monitoring, []}],
    
    
    ?line Info2ok = [{state, synced},
		     {own_group_name, gg1},
		     {own_group_nodes, GG1},
		     {synced_nodes, [mk_node(Ncp1, M)]},
		     {sync_error, []},
		     {no_contact, [mk_node(Ncp5, M)]},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg1, 1, GGNodes))},
		     {monitoring, []}],
    
    ?line Info3ok = [{state, synced},
		     {own_group_name, gg2},
		     {own_group_nodes, GG2},
		     {synced_nodes, []},
		     {sync_error, []},
		     {no_contact, []},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg2, 1, GGNodes))},
		     {monitoring, []}],

    ?line InfoAok = [{state, synced},
		     {own_group_name, gg4},
		     {own_group_nodes, GG4},
		     {synced_nodes, lists:delete(mk_node(NcpA, M), GG4)},
		     {sync_error, []},
		     {no_contact, []},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg4, 1, GGNodes))},
		     {monitoring, []}],

    ?line InfoBok = [{state, synced},
		     {own_group_name, gg4},
		     {own_group_nodes, GG4},
		     {synced_nodes, lists:delete(mk_node(NcpB, M), GG4)},
		     {sync_error, []},
		     {no_contact, []},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg4, 1, GGNodes))},
		     {monitoring, []}],

    ?line InfoCok = [{state, synced},
		     {own_group_name, gg5},
		     {own_group_nodes, GG5},
		     {synced_nodes, lists:delete(mk_node(NcpC, M), GG5)},
		     {sync_error, []},
		     {no_contact, []},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg5, 1, GGNodes))},
		     {monitoring, []}],

    ?line InfoDok = [{state, synced},
		     {own_group_name, gg5},
		     {own_group_nodes, GG5},
		     {synced_nodes, lists:delete(mk_node(NcpD, M), GG5)},
		     {sync_error, []},
		     {no_contact, []},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg5, 1, GGNodes))},
		     {monitoring, []}],

    ?line InfoEok = [{state, synced},
		     {own_group_name, gg5},
		     {own_group_nodes, GG5},
		     {synced_nodes, lists:delete(mk_node(NcpE, M), GG5)},
		     {sync_error, []},
		     {no_contact, []},
		     {other_groups, remove_gg_pub_type(lists:keydelete
                                                          (gg5, 1, GGNodes))},
		     {monitoring, []}],
    

    ?line case Info1 of
	      Info1ok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", Cp1}, {Info1, Info1ok}})
	  end,

    ?line case Info2 of
	      Info2ok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", Cp2}, {Info2, Info2ok}})
	  end,

    ?line case Info3 of
	      Info3ok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", Cp3}, {Info3, Info3ok}})
	  end,

    ?line case InfoA of
	      InfoAok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", CpA}, {InfoA, InfoAok}})
	  end,

    ?line case InfoB of
	      InfoBok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", CpB}, {InfoB, InfoBok}})
	  end,


    ?line case InfoC of
	      InfoCok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", CpC}, {InfoC, InfoCok}})
	  end,

    ?line case InfoD of
	      InfoDok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", CpD}, {InfoD, InfoDok}})
	  end,

    ?line case InfoE of
	      InfoEok -> 
		  ok;
	      _ ->
		  test_server:fail({{"could not change the global groups"
                                     " in node", CpE}, {InfoE, InfoEok}})
	  end,

    write_high_level_trace(Config), % no good since CpC was restarted
    stop_node(Cp1),   
    stop_node(Cp2),   
    stop_node(Cp3),  
    stop_node(CpA),
    stop_node(CpB),
    stop_node(CpC),
    stop_node(CpD),
    stop_node(CpE),

    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

sync_and_wait(Node) ->
    Ref = make_ref(),
    Self = self(),
    spawn(Node, fun () ->
			global_group:sync(),
			case whereis(global_group_check) of
			    P when is_pid(P) ->
				Self ! {Ref, P};
			    _ ->
				Self ! {Ref, done}
			end
		end),
    receive
	{Ref, P} when is_pid(P) ->
	    MonRef = erlang:monitor(process, P),
	    receive
		{'DOWN',MonRef,process,P,_} ->
		    ok
	    end;
	{Ref, _} ->
	    ok
    end.

%%% Copied from init_SUITE.erl.
is_real_system(KernelVsn, StdlibVsn) ->
    LibDir = code:lib_dir(),
    filelib:is_dir(filename:join(LibDir,  "kernel-" ++ KernelVsn))
      andalso
    filelib:is_dir(filename:join(LibDir,  "stdlib-" ++ StdlibVsn)).

create_script_dc(ScriptName) ->
    ?line Name = filename:join(".", ScriptName),
    ?line Apps = application_controller:which_applications(),
    ?line {value,{_,_,KernelVer}} = lists:keysearch(kernel,1,Apps),
    ?line {value,{_,_,StdlibVer}} = lists:keysearch(stdlib,1,Apps),
    ?line {ok,Fd} = file:open(Name ++ ".rel", [write]),
    ?line {_, Version} = init:script_id(),
    ?line io:format(Fd,
		    "{release, {\"Test release 3\", \"~s\"}, \n"
		    " {erts, \"4.4\"}, \n"
		    " [{kernel, \"~s\"}, {stdlib, \"~s\"}]}.\n",
		    [Version, KernelVer, StdlibVer]),
    ?line file:close(Fd),
    {KernelVer, StdlibVer}.

%% Not used?
config_dc(Fd, Ncp1, Ncp2, Ncp3) ->
    M = from($@, atom_to_list(node())),
    io:format(Fd, "[{kernel, [{sync_nodes_optional, ['~s@~s','~s@~s','~s@~s']},"
	          "{sync_nodes_timeout, 1000},"
                  "{global_groups, [{gg1, ['~s@~s', '~s@~s']},"
	          "               {gg2, ['~s@~s']}]}"
	          "              ]}].~n",
	      [Ncp1, M, Ncp2, M, Ncp3, M,  Ncp1, M, Ncp2, M, Ncp3, M]).


config_dc1(Fd, Ncp1, Ncp2, Ncp3, NcpA, NcpB, NcpC, NcpD, NcpE) ->
    M = from($@, atom_to_list(node())),
    io:format(Fd, "[{kernel, [{sync_nodes_optional, ['~s@~s','~s@~s','~s@~s','~s@~s','~s@~s','~s@~s','~s@~s','~s@~s']},"
	          "{sync_nodes_timeout, 1000},"
                  "{global_groups, [{gg1, ['~s@~s', '~s@~s']},"
	          "                 {gg2, ['~s@~s']},"
	          "                 {gg4, normal, ['~s@~s','~s@~s','~s@~s']},"
	          "                 {gg5, hidden, ['~s@~s','~s@~s']}]}]}].~n",
	      [Ncp1, M, Ncp2, M, Ncp3, M,  
               NcpA, M, NcpB, M, NcpC, M, NcpD, M, NcpE, M, 
               Ncp1, M, Ncp2, M, 
               Ncp3, M, 
               NcpA, M, NcpB, M, NcpC, M, 
               NcpD, M, NcpE, M]).

config_dc2(Fd, NewGG, Ncp1, Ncp2, Ncp3) ->
    M = from($@, atom_to_list(node())),
    io:format(Fd, "[{kernel, [{sync_nodes_optional, ['~s@~s','~s@~s','~s@~s']},"
	          "{sync_nodes_timeout, 1000},"
                  "~p]}].~n",
	      [Ncp1, M, Ncp2, M, Ncp3, M, NewGG]).


from(H, [H | T]) -> T;
from(H, [_ | T]) -> from(H, T);
from(_H, []) -> [].



other(A, [A, _B]) -> A;
other(_, [_A, B]) -> B.
     

%% this one runs at cp2
part1(Config, Main, Cp1, Cp3) ->
    case catch begin
		   make_partition(Config, [Main, Cp1], [node(), Cp3]),
		   ?line {_Pid, yes} = start_proc(test2),
		   ?line {_Pid2, yes} = start_proc(test4)
	       end of
	{_, yes} -> ok; % w("ok", []);
	{'EXIT', _R} ->
	    ok
	    % w("global_SUITE line:~w: ~p", [?LINE, _R])
    end.

%% Runs at Cp2
part1_5(Config, Main, Cp1, Cp3) ->
    case catch begin
		   make_partition(Config, [Main, Cp1], [node(), Cp3]),
		   ?line {_Pid1, yes} = start_proc_basic(name12),
		   ?line {_Pid2, yes} = 
                       rpc:call(Cp3, ?MODULE, start_proc_basic, [name03])
	       end of
	{_, yes} -> ok; % w("ok", []);
	{'EXIT', _R} ->
	    ok
            % w("global_SUITE line:~w: ~p", [?LINE, _R])
    end.

w(X,Y) ->
    {ok, F} = file:open("cp2.log", [write]),
    io:format(F, X, Y),
    file:close(F).

%% this one runs on one node in Part2
%% The partition is ready when is_ready_partition(Config) returns (true).
make_partition(Config, Part1, Part2) ->
    Dir = ?config(priv_dir, Config),
    Ns = [begin 
              Name = lists:concat([atom_to_list(N),"_",msec(),".part"]),
              File = filename:join([Dir, Name]),
              file:delete(File),
              rpc_cast(N, ?MODULE, mk_part_node, [File, Part, Config], File),
              {N, File}
          end || Part <- [Part1, Part2], N <- Part],
    all_nodes_files(Ns, "done", Config),
    lists:foreach(fun({_N,File}) -> file:delete(File) end, Ns),
    PartFile = make_partition_file(Config),
    touch(PartFile, "done").

%% The node signals its success by touching a file.
mk_part_node(File, MyPart0, Config) ->
    touch(File, "start"), % debug
    MyPart = lists:sort(MyPart0),
    ?UNTIL(is_node_in_part(File, MyPart)),
    touch(File, "done").

%% The calls to append_to_file are for debugging.
is_node_in_part(File, MyPart) ->
    lists:foreach(fun(N) -> 
                          _ = erlang:disconnect_node(N)
                  end, nodes() -- MyPart),
    case {(Known = get_known(node())) =:= MyPart, 
          (Nodes = lists:sort([node() | nodes()])) =:= MyPart} of
        {true, true} ->
            %% Make sure the resolvers have been terminated,
            %% otherwise they may pop up and send some message.
            %% (This check is probably unnecessary.)
            case element(5, global:info()) of
                [] ->
                    true;
                Rs ->
                    erlang:display({is_node_in_part, resolvers, Rs}),
                    trace_message({node(), is_node_in_part, Rs}),
                    append_to_file(File, {now(), Known, Nodes, Rs}),
                    false
            end;
        _ ->
            append_to_file(File, {now(), Known, Nodes}),
            false
    end.

is_ready_partition(Config) ->
    File = make_partition_file(Config),
    file_contents(File, "done", Config),
    file:delete(File),
    true.

make_partition_file(Config) ->
    Dir = ?config(priv_dir, Config),
    filename:join([Dir, atom_to_list(make_partition_done)]).

%% this one runs at cp3
part2(Config, Parent, Main, Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6) ->
    make_partition(Config, [Main, Cp0, Cp1, Cp2], [Cp3, Cp4, Cp5, Cp6]),
    start_procs(Parent, Cp4, Cp5, Cp6, Config).

part3(Config, Parent, Main, Cp0, Cp1, Cp2, Cp3, Cp4, Cp5, Cp6) ->
    make_partition(Config, [Main, Cp0, Cp1, Cp2], [Cp3, Cp4, Cp5, Cp6]),
    start_procs(Parent, Cp4, Cp5, Cp6, Config),
    % Make Cp6 alone
    ?line rpc_cast(Cp5, ?MODULE, crash, [12000]),
    ?line rpc_cast(Cp6, ?MODULE, alone, [Cp0, Cp3]).

start_procs(Parent, N1, N2, N3, Config) ->
    S1 = lists:sort([N1, N2, N3]),
    ?line 
    ?UNTIL(begin
	       NN = lists:sort(nodes()),
	       S1 =:= NN
	   end),
    ?line Pid3 = start_proc3(test1),
    ?line Pid4 = rpc:call(N1, ?MODULE, start_proc3, [test2]),
    ?line assert_pid(Pid4),
    ?line Pid5 = rpc:call(N2, ?MODULE, start_proc3, [test3]),
    ?line assert_pid(Pid5),
    ?line Pid6 = rpc:call(N3, ?MODULE, start_proc3, [test4]),
    ?line assert_pid(Pid6),
    ?line yes = global:register_name(test1, Pid3),
    ?line yes = global:register_name(test2, Pid4, {global, notify_all_name}),
    ?line yes = global:register_name(test3, Pid5, {global, random_notify_name}),
    Resolve = fun(Name, Pid1, Pid2) ->
		      Parent ! {resolve_called, Name, node()},
		      {Min, Max} = minmax(Pid1, Pid2),
		      exit(Min, kill),
		      Max
	      end,
    ?line yes = global:register_name(test4, Pid6, Resolve).


    
collect_resolves() -> cr(0).
cr(Res) ->
    receive
	{resolve_called, Name, Node} ->
	    io:format("resolve called: ~w ~w~n", [Name, Node]),
 	    cr(Res+1)
    after
	0 -> Res
    end.

minmax(P1,P2) ->
    if node(P1) < node(P2) -> {P1, P2}; true -> {P2, P1} end.

fix_basic_name(name03, Pid1, Pid2) ->
    case atom_to_list(node(Pid1)) of
	[$c, $p, $3|_] -> exit(Pid2, kill), Pid1;
	_ -> exit(Pid1, kill), Pid2
    end;
fix_basic_name(name12, Pid1, Pid2) ->
    case atom_to_list(node(Pid1)) of
	[$c, $p, $2|_] -> exit(Pid2, kill), Pid1;
	_ -> exit(Pid1, kill), Pid2
    end.

start_proc() ->
    Pid = spawn(?MODULE, p_init, [self()]),
    receive
	Pid -> Pid
    end.
    

start_proc(Name) ->
    Pid = spawn(?MODULE, p_init, [self(), Name]),
    receive
	{Pid, Res} -> {Pid, Res}
    end.

start_proc2(Name) ->
    Pid = spawn(?MODULE, p_init2, [self(), Name]),
    receive
	Pid -> Pid
    end.

start_proc3(Name) ->
    Pid = spawn(?MODULE, p_init, [self()]),
    register(Name, Pid),
    receive
	Pid -> Pid
    end.

start_proc4(Name) ->
    Pid = spawn(?MODULE, p_init, [self()]),
    yes = global:register_name(Name, Pid),
    receive
	Pid -> Pid
    end.

start_proc_basic(Name) ->
    Pid = spawn(?MODULE, init_proc_basic, [self(), Name]),
    receive
	{Pid, Res} -> {Pid, Res}
    end.

init_proc_basic(Parent, Name) ->
    X = global:register_name(Name, self(), {?MODULE, fix_basic_name}),
    Parent ! {self(),X},
    loop().

single_node(Time, Node, Config) ->
    exit(erlang:whereis(user), kill),
    lists:foreach(fun(N) -> _ = erlang:disconnect_node(N) end, nodes()),
    ?UNTIL(get_known(node()) =:= [node()]),
    spawn(?MODULE, init_2, []),
    test_server:sleep(Time - msec()),
    net_adm:ping(Node).

init_2() ->
    register(single_name, self()),
    yes = global:register_name(single_name, self()),
    loop_2().

loop_2() ->
    receive
	die -> ok
    end.
    
msec() ->
    msec(now()).

msec(T) ->
     element(1,T)*1000000000 + element(2,T)*1000 + element(3,T) div 1000.

assert_pid(Pid) ->
    if
	is_pid(Pid) -> true;
	true -> exit({not_a_pid, Pid})
    end.

check_same([H|T]) -> check_same(T, H).

check_same([H|T], H) -> check_same(T, H);
check_same([], _H) -> ok.

check_same_p([H|T]) -> check_same_p(T, H).

check_same_p([H|T], H) -> check_same_p(T, H);
check_same_p([], _H) -> true;
check_same_p(_, _) -> false.

p_init(Parent) ->
    Parent ! self(),
    loop().

p_init(Parent, Name) ->
    X = global:register_name(Name, self()),
    Parent ! {self(),X},
    loop().

p_init2(Parent, Name) ->
    _ = global:re_register_name(Name, self()),
    Parent ! self(),
    loop().

req(Pid, Msg) ->
    Pid ! Msg,
    receive X -> X end.

sreq(Pid, Msg) ->
    Ref = make_ref(),
    Pid ! {Msg, Ref},
    receive {Ref, X} -> X end.

alone(N1, N2) ->
    lists:foreach(fun(Node) -> true = erlang:disconnect_node(Node) end,
                  nodes()),
    test_server:sleep(12000),
    net_adm:ping(N1),
    net_adm:ping(N2),
    yes = global:register_name(test5, self()).

crash(Time) ->
    test_server:sleep(Time),
    erlang:halt().

loop() ->
    receive
	{ping, From} ->
	    From ! {pong, node()},
	    loop();
	{del_lock, Id} ->
	    global:del_lock({Id, self()}),
	    loop();
	{del_lock_sync, Id, From} ->
	    global:del_lock({Id, self()}),
	    From ! true,
	    loop();
	{del_lock, Id, Nodes} ->
	    global:del_lock({Id, self()}, Nodes),
	    loop();
	{del_lock2, Id, From} ->
	    global:del_lock(Id),
	    From ! true,
	    loop();
	{del_lock2, Id, From, Nodes} ->
	    global:del_lock(Id, Nodes),
	    From ! true,
	    loop();
	{set_lock, Id, From} ->
	    Res = global:set_lock({Id, self()}, ?NODES, 1),
	    From ! Res,
	    loop();
	{set_lock, Id, From, Nodes} ->
	    Res = global:set_lock({Id, self()}, Nodes, 1),
	    From ! Res,
	    loop();
	{set_lock_loop, Id, From} ->
	    true = global:set_lock({Id, self()}, ?NODES),
	    From ! {got_lock, self()},
	    loop();
	{set_lock2, Id, From} ->
	    Res = global:set_lock(Id, ?NODES, 1),
	    From ! Res,
	    loop();
	{{got_notify, From}, Ref} ->
	    receive
		X when element(1, X) =:= global_name_conflict ->
		    From ! {Ref, yes}
	    after
		0 -> From ! {Ref, no}
	    end,
	    loop();
	die ->
	    exit(normal);
	drop_dead ->
	    exit(drop_dead)
    end.

-ifdef(unused).
pr_diff(Str, T0, T1) ->
    Diff = begin
	       {_, {H,M,S}} = calendar:time_difference(T0, T1),
	       ((H*60+M)*60)+S
	   end,
    test_server:format(1,"~13s: ~w (diff: ~w)",[Str, T1, Diff]),
    if
	Diff > 100 ->
	    test_server:format(1,"~s: ** LARGE DIFF ~w~n", [Str, Diff]);
	true -> 
	    ok
    end.
-endif.	    

now_diff({A1,B1,C1},{A2,B2,C2}) ->
     C1-C2 + 1000000*((B1-B2) + 1000000*(A1-A2)).

start_node_boot(Name, Config, Boot) ->
    Pa = filename:dirname(code:which(?MODULE)),
    Res = test_server:start_node(Name, peer, [{args, " -pa " ++ Pa ++ 
						     " -config " ++ Config ++
						     " -boot " ++ atom_to_list(Boot)}]),
    record_started_node(Res).

%% Increase the timeout for when an upcoming connection is teared down
%% again (default is 7 seconds, and can be exceeded by some tests).
%% The default remains in effect for the test_server node itself, though.
start_node(Name, Config) ->
    start_node(Name, slave, Config).

start_hidden_node(Name, Config) ->
    start_node(Name, slave, "-hidden", Config).

start_non_connecting_node(Name, Config) ->
    start_node(Name, slave, "-connect_all false +W i", Config).

start_peer_node(Name, Config) ->
    start_node(Name, peer, Config).

start_node(Name, How, Config) ->
    start_node(Name, How, "", Config).

start_node(Name0, How, Args, Config) ->
    Name = node_name(Name0, Config),
    Pa = filename:dirname(code:which(?MODULE)),
    R = test_server:start_node(Name, How, [{args,
					    Args ++ " " ++
					    "-kernel net_setuptime 100 "
%					    "-noshell "
					    "-pa " ++ Pa},
					   {linked, false}
]),
    %% {linked,false} only seems to work for slave nodes.
%    test_server:sleep(1000),
    record_started_node(R).

start_node_rel(Name0, Rel, Config) ->
    Name = node_name(Name0, Config),
    {Release, Compat} = case Rel of
                            this ->
                                {[this], "+R8"};
                            Rel when is_atom(Rel) ->
                                {[{release, atom_to_list(Rel)}], ""};
                            RelList ->
			       {RelList, ""}
		       end,
    Env = [],
    Pa = filename:dirname(code:which(?MODULE)),
    Res = test_server:start_node(Name, peer, 
                                 [{args,
                                   Compat ++ 
                                   " -kernel net_setuptime 100 "
                                   " -pa " ++ Pa},
                                  {erl, Release}] ++ Env),
    record_started_node(Res).

record_started_node({ok, Node}) ->
    case erase(?nodes_tag) of
        undefined -> ok;
        Nodes -> put(?nodes_tag, [Node | Nodes])
    end,
    {ok, Node};
record_started_node(R) ->
    R.

node_names(Names, Config) ->
    [node_name(Name, Config) || Name <- Names].

%% simple_resolve assumes that the node name comes first.
node_name(Name, Config) ->
    U = "_",
    {{Y,M,D}, {H,Min,S}} = calendar:now_to_local_time(now()),
    Date = io_lib:format("~4w_~2..0w_~2..0w__~2..0w_~2..0w_~2..0w", 
                         [Y,M,D, H,Min,S]),
    L = lists:flatten(Date),
    lists:concat([Name,U,?testcase,U,U,L]).

stop_nodes(Nodes) ->
    lists:foreach(fun(Node) -> stop_node(Node) end, Nodes).

stop_node(Node) ->
    ?line ?t:stop_node(Node).


stop() ->
    lists:foreach(fun(Node) ->
			  ?t:stop_node(Node)
		  end, nodes()).

dbg_logs(Name) -> dbg_logs(Name, ?NODES).

dbg_logs(Name, Nodes) ->
    lists:foreach(fun(N) ->
			  F = lists:concat([Name, ".log.", N, ".txt"]),
			  ?line ok = sys:log_to_file({global_name_server, N}, F)
		  end, Nodes).


global_lost_nodes(suite) ->
    [];
global_lost_nodes(doc) ->
    ["Tests that locally loaded nodes do not loose contact with other nodes."];
global_lost_nodes(Config) when is_list(Config) ->
    Timeout = 60,
    Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    
    ?line {ok, Node1} = start_node(node1, Config),
    ?line {ok, Node2} = start_node(node2, Config),

    ?line wait_for_ready_net(Config),

    ?line io:format("Nodes: ~p", [nodes()]),
    ?line io:format("Nodes at node1: ~p",
		    [rpc:call(Node1, erlang, nodes, [])]),
    ?line io:format("Nodes at node2: ~p",
		    [rpc:call(Node2, erlang, nodes, [])]),

    ?line rpc_cast(Node1, ?MODULE, global_load, [node_1,Node2,node_2]),
    ?line rpc_cast(Node2, ?MODULE, global_load, [node_2,Node1,node_1]),

    lost_nodes_waiter(Node1, Node2),

    write_high_level_trace(Config),
    ?line stop_node(Node1),
    ?line stop_node(Node2),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.    

global_load(MyName, OtherNode, OtherName) ->
    ?line yes = global:register_name(MyName, self()),
    io:format("Registered ~p",[MyName]),
    global_load1(OtherNode, OtherName, 0).

global_load1(_OtherNode, _OtherName, 2) ->
    io:format("*** ~p giving up. No use.", [node()]),
    init:stop();
global_load1(OtherNode, OtherName, Fails) ->	
    test_server:sleep(1000),
    ?line case catch global:whereis_name(OtherName) of
	      Pid when is_pid(Pid) ->
		  io:format("~p says: ~p is still there.",
			    [node(),OtherName]),
		  global_load1(OtherNode, OtherName, Fails);
	      Other ->
		  io:format("~p says: ~p is lost (~p) Pinging.",
			    [ node(), OtherName, Other]),
		  case net_adm:ping(OtherNode) of
		      pong ->
			  io:format("Re-established contact to ~p",
				    [OtherName]);
		      pang ->
			  io:format("PANIC! Other node is DEAD.", []),
			  init:stop()
		  end,
 		  global_load1(OtherNode, OtherName, Fails+1)
	  end.

lost_nodes_waiter(N1, N2) ->
    ?line net_kernel:monitor_nodes(true),
    receive
	{nodedown, Node} when Node =:= N1 ; Node =:= N2 ->
	    io:format("~p went down!",[Node]),
	    ?line ?t:fail("Node went down.")
    after 10000 ->
	    ok
    end,
    ok.



mass_death(suite) ->
    [];
mass_death(doc) ->
    ["Tests the simultaneous death of many processes with registered names"];
mass_death(Config) when is_list(Config) ->
    Timeout = 90,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line OrigNames = global:registered_names(),
    %% Start nodes
    ?line Cps = [cp1,cp2,cp3,cp4,cp5],
    ?line Nodes = [begin {ok, Node} = start_node(Cp, Config), Node end ||
                      Cp <- Cps],
    ?line io:format("Nodes: ~p~n", [Nodes]),
    ?line Ns = lists:seq(1, 40),
    %% Start processes with globally registered names on the nodes
    ?line {Pids,[]} = rpc:multicall(Nodes, ?MODULE, mass_spawn, [Ns]),
    ?line io:format("Pids: ~p~n", [Pids]),
    %% Wait...
    ?line test_server:sleep(10000),
    %% Check the globally registered names
    ?line NewNames = global:registered_names(),
    ?line io:format("NewNames: ~p~n", [NewNames]),
    ?line Ndiff = lists:sort(NewNames--OrigNames),
    ?line io:format("Ndiff: ~p~n", [Ndiff]),
    ?line Ndiff = lists:sort(mass_names(Nodes, Ns)),
    %%
    %% Kill the root pids
    ?line lists:foreach(fun (Pid) -> Pid ! drop_dead end, Pids),
    %% Start probing and wait for all registered names to disappear
    {YYYY,MM,DD} = date(),
    {H,M,S} = time(),
    io:format("Started probing: ~.4.0w-~.2.0w-~.2.0w ~.2.0w:~.2.0w:~.2.0w~n",
	      [YYYY,MM,DD,H,M,S]),
    wait_mass_death(Dog, Nodes, OrigNames, erlang:now(), Config).

wait_mass_death(Dog, Nodes, OrigNames, Then, Config) ->
    ?line Names = global:registered_names(),
    ?line 
	case Names--OrigNames of
	    [] ->
 		?line T = now_diff(erlang:now(), Then) div 1000,
		?line lists:foreach(
			fun (Node) ->
				stop_node(Node)
			end, Nodes),
                ?line init_condition(Config),
		?line test_server:timetrap_cancel(Dog),
 		{comment,lists:flatten(io_lib:format("~.3f s~n", [T/1000.0]))};
	    Ndiff ->
		?line io:format("Ndiff: ~p~n", [Ndiff]),
		?line test_server:sleep(1000),
		?line wait_mass_death(Dog, Nodes, OrigNames, Then, Config)
	end.

mass_spawn([]) ->
    ok;
mass_spawn([N|T]) ->
    Parent = self(),
    Pid = 
	spawn_link(
	  fun () ->
		  Name = mass_name(node(), N),
		  yes = global:register_name(Name, self()),
		  mass_spawn(T),
		  Parent ! self(),
		  loop()
	  end),
    receive Pid -> Pid end.

mass_names([], _) ->
    [];
mass_names([Node|T],Ns) ->
    [mass_name(Node, N) || N <- Ns] ++ mass_names(T, Ns).

mass_name(Node, N) ->
    list_to_atom(atom_to_list(Node)++"_"++integer_to_list(N)).



start_nodes(L, How, Config) ->
    start_nodes2(L, How, 0, Config),
    Nodes = collect_nodes(0, length(L)),
    ?line ?UNTIL([] =:= Nodes -- nodes()),
    put(?nodes_tag, Nodes),
    %% Pinging doesn't help, we have to wait too, for nodes() to become
    %% correct on the other node.
    lists:foreach(fun(E) ->
			  net_adm:ping(E)
		  end,
		  Nodes),
    verify_nodes(Nodes, Config),
    Nodes.

%% Not used?
start_nodes_serially([], _, _Config) ->
    [];
start_nodes_serially([Name | Rest], How, Config) ->
    {ok, R} = start_node(Name, How, Config),
    [R | start_nodes_serially(Rest, How, Config)].

verify_nodes(Nodes, Config) ->
    verify_nodes(Nodes, lists:sort([node() | Nodes]), Config).

verify_nodes([], _N, _Config) ->
    [];
verify_nodes([Node | Rest], N, Config) ->
    ?line ?UNTIL(
       case rpc:call(Node, erlang, nodes, []) of
	   Nodes when is_list(Nodes) ->
	       case N =:= lists:sort([Node | Nodes]) of
		   true ->
		       true;
		   false ->
		       lists:foreach(fun(Nd) ->
					     rpc:call(Nd, net_adm, ping,
                                                      [Node])
				     end,
				     nodes()),
		       false
	       end;
	   _ ->
	       false
       end
      ),
    verify_nodes(Rest, N, Config).


start_nodes2([], _How, _, _Config) ->
    [];
start_nodes2([Name | Rest], How, N, Config) ->
    Self = self(),
    spawn(fun() ->
		  erlang:display({starting, Name}),
		  {ok, R} = start_node(Name, How, Config),
		  erlang:display({started, Name, R}),
		  Self ! {N, R},
		  %% sleeping is necessary, or with peer nodes, they will
		  %% go down again, despite {linked, false}.
		  test_server:sleep(100000)
	  end),
    start_nodes2(Rest, How, N+1, Config).

collect_nodes(N, N) ->
    [];
collect_nodes(N, Max) ->
    receive
	{N, Node} ->
            [Node | collect_nodes(N+1, Max)]
    end.

only_element(_E, []) ->
    true;
only_element(E, [E|R]) ->
    only_element(E, R);
only_element(_E, _) ->
    false.

exit_p(Pid) ->
    Ref = erlang:monitor(process, Pid),
    Pid ! die,
    receive
	{'DOWN', Ref, process, Pid, _Reason} ->
	    ok
    end.

wait_for_exit(Pid) ->
    Ref = erlang:monitor(process, Pid),
    receive
	{'DOWN', Ref, process, Pid, _Reason} ->
	    ok
    end.

wait_for_exit_fast(Pid) ->
    Ref = erlang:monitor(process, Pid),
    receive
	{'DOWN', Ref, process, Pid, _Reason} ->
	    ok
    end.

check_everywhere(Nodes, Name, Config) ->
    ?UNTIL(begin
	       case rpc:multicall(Nodes, global, whereis_name, [Name]) of
		   {Ns1, []} ->
		       check_same_p(Ns1);
		   _R ->
		       false
	       end
	   end).

init_condition(Config) ->
    io:format("globally registered names: ~p~n", [global:registered_names()]),
    io:format("nodes: ~p~n", [nodes()]),
    io:format("known: ~p~n", [get_known(node()) -- [node()]]),
    io:format("Info ~p~n", [setelement(11, global:info(), trace)]),
    _ = [io:format("~s: ~p~n", [TN, ets:tab2list(T)]) ||
            {TN, T} <- [{"Global Names     (ETS)", global_names},
                        {"Global Names Ext (ETS)", global_names_ext},
                        {"Global Locks     (ETS)", global_locks},
                        {"Global Pid Names (ETS)", global_pid_names},
                        {"Global Pid Ids   (ETS)", global_pid_ids}]],
    ?UNTIL([test_server] =:= global:registered_names()),
    ?UNTIL([] =:= nodes()),
    ?UNTIL([node()] =:= get_known(node())),
    ok.

mk_node(N, H) when is_list(N), is_list(H) ->
    list_to_atom(N ++ "@" ++ H).

remove_gg_pub_type([]) ->
    [];
remove_gg_pub_type([{GG, Nodes}|Rest]) ->
    [{GG, Nodes}|remove_gg_pub_type(Rest)];
remove_gg_pub_type([{GG, _, Nodes}|Rest]) ->
    [{GG, Nodes}|remove_gg_pub_type(Rest)].

%% Send garbage message to all processes that are linked to global.
%% Better do this in a slave node.
%% (The transition from links to monitors does not affect this case.)

garbage_messages(suite) ->
    [];
garbage_messages(Config) when is_list(Config) ->
    Timeout = 25,
    ?line Dog = test_server:timetrap({seconds,Timeout}),
    init_high_level_trace(Timeout),
    ?line init_condition(Config),    
    ?line [Slave] = start_nodes([garbage_messages], slave, Config),
    Fun = fun() ->
		  {links,L} = process_info(whereis(global_name_server), links),
		  lists:foreach(fun(Pid) -> Pid ! {garbage,to,you} end, L),
		  receive
		      _Any -> ok
		  end
	  end,
    ?line Pid = spawn_link(Slave, erlang, apply, [Fun,[]]),
    ?t:sleep(2000),
    ?line Global = rpc:call(Slave, erlang, whereis, [global_name_server]),
    ?line {registered_name,global_name_server} =
	rpc:call(Slave, erlang, process_info, [Global,registered_name]),
    ?line true = unlink(Pid),
    write_high_level_trace(Config),
    ?line stop_node(Slave),
    ?line init_condition(Config),
    ?line test_server:timetrap_cancel(Dog),
    ok.

wait_for_ready_net(Config) ->
    wait_for_ready_net(?NODES, Config).

wait_for_ready_net(Nodes0, Config) ->
    Nodes = lists:sort(Nodes0),
    ?t:format("wait_for_ready_net ~p~n", [Nodes]),
    ?UNTIL(begin
               lists:all(fun(N) -> Nodes =:= get_known(N) end, Nodes) and
               lists:all(fun(N) -> 
                                 LNs = rpc:call(N, erlang, nodes, []),
                                 Nodes =:= lists:sort([N | LNs])
                         end, Nodes)
           end).

get_known(Node) ->
    case catch gen_server:call({global_name_server,Node},get_known,infinity) of
        {'EXIT', _} ->
            [list, without, nodenames];
        Known when is_list(Known) -> 
            lists:sort([Node | Known])
    end.

quite_a_few_nodes(Max) ->
    N = try 
            ulimit("ulimit -u")
        catch _:_ ->
            ulimit("ulimit -p") % can fail...
        end,
    lists:min([(N - 40) div 3, Max]).

ulimit(Cmd) ->
    N0 = os:cmd(Cmd),
    N1 = lists:reverse(N0),
    N2 = lists:dropwhile(fun($\r) -> true;
			    ($\n) -> true;
			    (_) -> false
			 end, N1),
    case lists:reverse(N2) of
        "unlimited" -> 10000;
        N -> list_to_integer(N)
    end.

%% To make it less probable that some low-level problem causes
%% problems, the receiving node is ping:ed.
rpc_cast(Node, Module, Function, Args) ->
    {_,pong,Node}= {node(),net_adm:ping(Node),Node},
    rpc:cast(Node, Module, Function, Args).

rpc_cast(Node, Module, Function, Args, File) ->
    case net_adm:ping(Node) of
        pong ->
            rpc:cast(Node, Module, Function, Args);
        Else ->
            append_to_file(File, {now(), {rpc_cast, Node, Module, Function,
                                          Args, Else}})
            %% Maybe we should crash, but it probably doesn't matter.
    end.

%% The emulator now ensures that the node has been removed from
%% nodes().
rpc_disconnect_node(Node, DisconnectedNode, _Config) ->
    True = rpc:call(Node, erlang, disconnect_node, [DisconnectedNode]),
    False = lists:member(DisconnectedNode, rpc:call(Node, erlang, nodes, [])),
    {true, false} = {True, False}.

%%%
%%% Utility
%%%

%% It is a bit awkward to collect data from different nodes. One way
%% of doing is to use a named tracer process on each node. Interesting
%% data is banged to the tracer and when the test is finished data is
%% collected on some node by sending messages to the tracers. One
%% cannot do this if the net has been set up to be less than fully
%% connected. One can also prepare other modules, such as 'global', by
%% inserting lines like
%%   trace_message({node(), {at,?LINE}, {tag, message})
%% where appropriate.

start_tracer() ->
    Pid = spawn(fun() -> tracer([]) end),
    case catch register(my_tracer, Pid) of
        {'EXIT', _} ->
            ?t:fail(re_register_my_tracer);
        _ ->
            ok
    end.

tracer(L) ->
    receive 
        % {save, Term} ->
        %     tracer([{now(),Term} | L]);
        {get, From} ->
            From ! {trace, lists:reverse(L)},
            tracer([]);
        stop ->
            exit(normal);
        Term ->
            tracer([{now(),Term} | L])
    end.

stop_tracer() ->
    trace_message(stop).

get_trace() ->
    trace_message({get, self()}),
    receive {trace, L} ->
            L
    end.

collect_tracers(Nodes) ->
    Traces0 = [rpc:call(N, ?MODULE, get_trace, []) || N <- Nodes],
    Traces = [L || L <- Traces0, is_list(L)],
    try begin 
            Stamped = lists:keysort(1, lists:append(Traces)),
            NotStamped = [T || {_, T} <- Stamped],
            {Stamped, NotStamped}
        end
    catch _:_ -> {[], []}
    end.

trace_message(M) ->
    case catch my_tracer ! M of
        {'EXIT', _} ->
            ?t:fail(my_tracer_not_registered);
        _ ->
            ok
    end.

%%-----------------------------------------------------------------
%% The error_logger handler used for OTP-6931.
%%-----------------------------------------------------------------
init(Tester) ->
    {ok, Tester}.

handle_event({_, _GL, {_Pid,_String,[{nodeup,fake_node}=Msg]}}, Tester) ->
    Tester ! Msg,
    {ok, Tester};
handle_event(_Event, State) ->
    {ok, State}.

handle_info(_Info, State) ->
    {ok, State}.

handle_call(_Query, State) -> {ok, {error, bad_query}, State}.

terminate(_Reason, State) ->
    State.