1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
|
/*
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1996 by Silicon Graphics. All rights reserved.
* Copyright (c) 2000-2004 Hewlett-Packard Development Company, L.P.
* Copyright (c) 2009-2021 Ivan Maidanski
*
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
*
* Permission is hereby granted to use or copy this program
* for any purpose, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
/*
* This header is private to the gc. It is almost always included from
* gc_priv.h. However it is possible to include it by itself if just the
* configuration macros are needed. In that
* case, a few declarations relying on types declared in gc_priv.h will be
* omitted.
*/
#ifndef GCCONFIG_H
#define GCCONFIG_H
#ifdef CPPCHECK
# undef CLOCKS_PER_SEC
# undef FIXUP_POINTER
# undef POINTER_MASK
# undef POINTER_SHIFT
# undef REDIRECT_REALLOC
# undef _MAX_PATH
#endif
#ifndef PTR_T_DEFINED
typedef char * ptr_t;
# define PTR_T_DEFINED
#endif
#if !defined(sony_news)
# include <stddef.h> /* For size_t, etc. */
#endif
/* Note: Only wrap our own declarations, and not the included headers. */
/* In this case, wrap our entire file, but temporarily unwrap/rewrap */
/* around #includes. Types and macros do not need such wrapping, only */
/* the declared global data and functions. */
#ifdef __cplusplus
# define EXTERN_C_BEGIN extern "C" {
# define EXTERN_C_END } /* extern "C" */
#else
# define EXTERN_C_BEGIN /* empty */
# define EXTERN_C_END /* empty */
#endif
EXTERN_C_BEGIN
/* Convenient internal macro to test version of Clang. */
#if defined(__clang__) && defined(__clang_major__)
# define GC_CLANG_PREREQ(major, minor) \
((__clang_major__ << 16) + __clang_minor__ >= ((major) << 16) + (minor))
# define GC_CLANG_PREREQ_FULL(major, minor, patchlevel) \
(GC_CLANG_PREREQ(major, (minor) + 1) \
|| (__clang_major__ == (major) && __clang_minor__ == (minor) \
&& __clang_patchlevel__ >= (patchlevel)))
#else
# define GC_CLANG_PREREQ(major, minor) 0 /* FALSE */
# define GC_CLANG_PREREQ_FULL(major, minor, patchlevel) 0
#endif
#ifdef LINT2
/* A macro (based on a tricky expression) to prevent false warnings */
/* like "Array compared to 0", "Comparison of identical expressions", */
/* "Untrusted loop bound" output by some static code analysis tools. */
/* The argument should not be a literal value. The result is */
/* converted to word type. (Actually, GC_word is used instead of */
/* word type as the latter might be undefined at the place of use.) */
# define COVERT_DATAFLOW(w) (~(GC_word)(w)^(~(GC_word)0))
#else
# define COVERT_DATAFLOW(w) ((GC_word)(w))
#endif
/* Machine dependent parameters. Some tuning parameters can be found */
/* near the top of gc_private.h. */
/* Machine specific parts contributed by various people. See README file. */
#if defined(__ANDROID__) && !defined(HOST_ANDROID)
/* __ANDROID__ macro is defined by Android NDK gcc. */
# define HOST_ANDROID 1
#endif
#if defined(TIZEN) && !defined(HOST_TIZEN)
# define HOST_TIZEN 1
#endif
#if defined(__SYMBIAN32__) && !defined(SYMBIAN)
# define SYMBIAN
# ifdef __WINS__
# pragma data_seg(".data2")
# endif
#endif
/* First a unified test for Linux: */
# if (defined(linux) || defined(__linux__) || defined(HOST_ANDROID)) \
&& !defined(LINUX) && !defined(__native_client__)
# define LINUX
# endif
/* And one for NetBSD: */
# if defined(__NetBSD__)
# define NETBSD
# endif
/* And one for OpenBSD: */
# if defined(__OpenBSD__)
# define OPENBSD
# endif
/* And one for FreeBSD: */
# if (defined(__FreeBSD__) || defined(__DragonFly__) \
|| defined(__FreeBSD_kernel__)) && !defined(FREEBSD) \
&& !defined(GC_NO_FREEBSD) /* Orbis compiler defines __FreeBSD__ */
# define FREEBSD
# endif
/* And one for Darwin: */
# if defined(macosx) || (defined(__APPLE__) && defined(__MACH__))
# define DARWIN
EXTERN_C_END
# include <TargetConditionals.h>
EXTERN_C_BEGIN
# endif
/* Determine the machine type: */
# if defined(__native_client__)
# define NACL
# if !defined(__portable_native_client__) && !defined(__arm__)
# define I386
# define mach_type_known
# else
/* Here we will rely upon arch-specific defines. */
# endif
# endif
# if defined(__aarch64__)
# define AARCH64
# if !defined(LINUX) && !defined(DARWIN) && !defined(FREEBSD) \
&& !defined(NETBSD) && !defined(NN_BUILD_TARGET_PLATFORM_NX) \
&& !defined(OPENBSD) && !defined(_WIN32)
# define NOSYS
# define mach_type_known
# endif
# endif
# if defined(__arm) || defined(__arm__) || defined(__thumb__)
# define ARM32
# if defined(NACL)
# define mach_type_known
# elif !defined(LINUX) && !defined(NETBSD) && !defined(FREEBSD) \
&& !defined(OPENBSD) && !defined(DARWIN) && !defined(_WIN32) \
&& !defined(__CEGCC__) && !defined(NN_PLATFORM_CTR) \
&& !defined(GC_NO_NOSYS) && !defined(SN_TARGET_PSP2) \
&& !defined(SYMBIAN)
# define NOSYS
# define mach_type_known
# endif
# endif
# if defined(sun) && defined(mc68000) && !defined(CPPCHECK)
# error SUNOS4 no longer supported
# endif
# if defined(hp9000s300) && !defined(CPPCHECK)
# error M68K based HP machines no longer supported
# endif
# if defined(OPENBSD) && defined(m68k)
# define M68K
# define mach_type_known
# endif
# if defined(OPENBSD) && defined(__sparc__)
# define SPARC
# define mach_type_known
# endif
# if defined(OPENBSD) && defined(__arm__)
# define ARM32
# define mach_type_known
# endif
# if defined(OPENBSD) && defined(__aarch64__)
# define AARCH64
# define mach_type_known
# endif
# if defined(OPENBSD) && defined(__sh__)
# define SH
# define mach_type_known
# endif
# if defined(NETBSD) && (defined(m68k) || defined(__m68k__))
# define M68K
# define mach_type_known
# endif
# if defined(NETBSD) && defined(__powerpc__)
# define POWERPC
# define mach_type_known
# endif
# if defined(NETBSD) && (defined(__arm32__) || defined(__arm__))
# define ARM32
# define mach_type_known
# endif
# if defined(NETBSD) && defined(__aarch64__)
# define AARCH64
# define mach_type_known
# endif
# if defined(NETBSD) && defined(__sh__)
# define SH
# define mach_type_known
# endif
# if defined(vax) || defined(__vax__)
# define VAX
# ifdef ultrix
# define ULTRIX
# else
# define BSD
# endif
# define mach_type_known
# endif
# if defined(NETBSD) && defined(__vax__)
# define VAX
# define mach_type_known
# endif
# if defined(mips) || defined(__mips) || defined(_mips)
# define MIPS
# if defined(nec_ews) || defined(_nec_ews)
# define EWS4800
# endif
# if !defined(LINUX) && !defined(EWS4800) && !defined(NETBSD) \
&& !defined(OPENBSD)
# if defined(ultrix) || defined(__ultrix)
# define ULTRIX
# else
# define IRIX5 /* or IRIX 6.X */
# endif
# endif /* !LINUX */
# if defined(NETBSD) && defined(__MIPSEL__)
# undef ULTRIX
# endif
# define mach_type_known
# endif
# if defined(__QNX__)
# define I386
# define mach_type_known
# endif
# if defined(__NIOS2__) || defined(__NIOS2) || defined(__nios2__)
# define NIOS2 /* Altera NIOS2 */
# define mach_type_known
# endif
# if defined(__or1k__)
# define OR1K /* OpenRISC/or1k */
# define mach_type_known
# endif
# if defined(DGUX) && (defined(i386) || defined(__i386__))
# define I386
# ifndef _USING_DGUX
# define _USING_DGUX
# endif
# define mach_type_known
# endif
# if defined(sequent) && (defined(i386) || defined(__i386__))
# define I386
# define SEQUENT
# define mach_type_known
# endif
# if (defined(sun) || defined(__sun)) && (defined(i386) || defined(__i386__))
# define I386
# define SOLARIS
# define mach_type_known
# endif
# if (defined(sun) || defined(__sun)) && defined(__amd64)
# define X86_64
# define SOLARIS
# define mach_type_known
# endif
# if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
# define I386
# define OS2
# define mach_type_known
# endif
# if defined(ibm032) && !defined(CPPCHECK)
# error IBM PC/RT no longer supported
# endif
# if (defined(sun) || defined(__sun)) && (defined(sparc) || defined(__sparc))
/* Test for SunOS 5.x */
EXTERN_C_END
# include <errno.h>
EXTERN_C_BEGIN
# define SPARC
# define SOLARIS
# define mach_type_known
# elif defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
&& !defined(FREEBSD) && !defined(NETBSD) && !defined(OPENBSD)
# define SPARC
# define DRSNX
# define mach_type_known
# endif
# if defined(_IBMR2)
# define POWERPC
# define AIX
# define mach_type_known
# endif
# if defined(NETBSD) && defined(__sparc__)
# define SPARC
# define mach_type_known
# endif
# if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
/* The above test may need refinement */
# define I386
# if defined(_SCO_ELF)
# define SCO_ELF
# else
# define SCO
# endif
# define mach_type_known
# endif
# if defined(_AUX_SOURCE) && !defined(CPPCHECK)
# error A/UX no longer supported
# endif
# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
|| defined(hppa) || defined(__hppa__)
# define HP_PA
# if !defined(LINUX) && !defined(HPUX) && !defined(OPENBSD)
# define HPUX
# endif
# define mach_type_known
# endif
# if defined(__ia64) && (defined(_HPUX_SOURCE) || defined(__HP_aCC))
# define IA64
# ifndef HPUX
# define HPUX
# endif
# define mach_type_known
# endif
# if (defined(__BEOS__) || defined(__HAIKU__)) && defined(_X86_)
# define I386
# define HAIKU
# define mach_type_known
# endif
# if defined(__HAIKU__) && (defined(__amd64__) || defined(__x86_64__))
# define X86_64
# define HAIKU
# define mach_type_known
# endif
# if defined(OPENBSD) && defined(__amd64__)
# define X86_64
# define mach_type_known
# endif
# if defined(LINUX) && (defined(i386) || defined(__i386__))
# define I386
# define mach_type_known
# endif
# if defined(LINUX) && defined(__x86_64__)
# define X86_64
# define mach_type_known
# endif
# if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
# define IA64
# define mach_type_known
# endif
# if defined(LINUX) && defined(__e2k__)
# define E2K
# define mach_type_known
# endif
# if defined(LINUX) && defined(__aarch64__)
# define AARCH64
# define mach_type_known
# endif
# if defined(LINUX) && (defined(__arm) || defined(__arm__))
# define ARM32
# define mach_type_known
# endif
# if defined(LINUX) && defined(__cris__)
# ifndef CRIS
# define CRIS
# endif
# define mach_type_known
# endif
# if defined(LINUX) && defined(__loongarch__)
# define LOONGARCH
# define mach_type_known
# endif
# if defined(LINUX) && (defined(powerpc) || defined(__powerpc__) \
|| defined(powerpc64) || defined(__powerpc64__))
# define POWERPC
# define mach_type_known
# endif
# if defined(LINUX) && defined(__mc68000__)
# define M68K
# define mach_type_known
# endif
# if defined(LINUX) && (defined(sparc) || defined(__sparc__))
# define SPARC
# define mach_type_known
# endif
# if defined(LINUX) && defined(__sh__)
# define SH
# define mach_type_known
# endif
# if defined(LINUX) && defined(__avr32__)
# define AVR32
# define mach_type_known
# endif
# if defined(LINUX) && defined(__m32r__)
# define M32R
# define mach_type_known
# endif
# if defined(__alpha) || defined(__alpha__)
# define ALPHA
# if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) \
&& !defined(FREEBSD)
# define OSF1 /* a.k.a Digital Unix */
# endif
# define mach_type_known
# endif
# if defined(_AMIGA) && !defined(AMIGA)
# define AMIGA
# endif
# ifdef AMIGA
# define M68K
# define mach_type_known
# endif
# if defined(THINK_C) \
|| (defined(__MWERKS__) && !defined(__powerc) && !defined(SYMBIAN))
# define M68K
# define MACOS
# define mach_type_known
# endif
# if defined(__MWERKS__) && defined(__powerc) && !defined(__MACH__) \
&& !defined(SYMBIAN)
# define POWERPC
# define MACOS
# define mach_type_known
# endif
# if defined(OPENBSD) && defined(__powerpc__)
# define POWERPC
# define mach_type_known
# endif
# if defined(DARWIN)
# if defined(__ppc__) || defined(__ppc64__)
# define POWERPC
# define mach_type_known
# elif defined(__x86_64__) || defined(__x86_64)
# define X86_64
# define mach_type_known
# elif defined(__i386__)
# define I386
# define mach_type_known
# elif defined(__arm__)
# define ARM32
# define mach_type_known
# elif defined(__aarch64__)
# define AARCH64
# define mach_type_known
# endif
# endif
# if defined(__rtems__) && (defined(i386) || defined(__i386__))
# define I386
# define RTEMS
# define mach_type_known
# endif
# if defined(NeXT) && defined(mc68000)
# define M68K
# define NEXT
# define mach_type_known
# endif
# if defined(NeXT) && (defined(i386) || defined(__i386__))
# define I386
# define NEXT
# define mach_type_known
# endif
# if defined(OPENBSD) && (defined(i386) || defined(__i386__))
# define I386
# define mach_type_known
# endif
# if defined(NETBSD) && (defined(i386) || defined(__i386__))
# define I386
# define mach_type_known
# endif
# if defined(NETBSD) && defined(__x86_64__)
# define X86_64
# define mach_type_known
# endif
# if defined(FREEBSD) && (defined(i386) || defined(__i386__))
# define I386
# define mach_type_known
# endif
# if defined(FREEBSD) && (defined(__amd64__) || defined(__x86_64__))
# define X86_64
# define mach_type_known
# endif
# if defined(FREEBSD) && defined(__sparc__)
# define SPARC
# define mach_type_known
# endif
# if defined(FREEBSD) && (defined(powerpc) || defined(__powerpc__))
# define POWERPC
# define mach_type_known
# endif
# if defined(FREEBSD) && defined(__arm__)
# define ARM32
# define mach_type_known
# endif
# if defined(FREEBSD) && defined(__aarch64__)
# define AARCH64
# define mach_type_known
# endif
# if defined(FREEBSD) && (defined(mips) || defined(__mips) || defined(_mips))
# define MIPS
# define mach_type_known
# endif
# if defined(bsdi) && (defined(i386) || defined(__i386__))
# define I386
# define BSDI
# define mach_type_known
# endif
# if !defined(mach_type_known) && defined(__386BSD__)
# define I386
# define THREE86BSD
# define mach_type_known
# endif
# if defined(_CX_UX) && defined(_M88K)
# define M88K
# define CX_UX
# define mach_type_known
# endif
# if defined(DGUX) && defined(m88k)
# define M88K
/* DGUX defined */
# define mach_type_known
# endif
# if defined(_WIN32_WCE) || defined(__CEGCC__) || defined(__MINGW32CE__)
/* SH3, SH4, MIPS already defined for corresponding architectures */
# if defined(SH3) || defined(SH4)
# define SH
# endif
# if defined(x86) || defined(__i386__)
# define I386
# endif
# if defined(_M_ARM) || defined(ARM) || defined(_ARM_)
# define ARM32
# endif
# define MSWINCE
# define mach_type_known
# else
# if ((defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300)) \
|| (defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__) \
&& !defined(__INTERIX) && !defined(SYMBIAN))
# if defined(__LP64__) || defined(_M_X64)
# define X86_64
# elif defined(_M_ARM)
# define ARM32
# elif defined(_M_ARM64)
# define AARCH64
# else /* _M_IX86 */
# define I386
# endif
# ifdef _XBOX_ONE
# define MSWIN_XBOX1
# else
# ifndef MSWIN32
# define MSWIN32 /* or Win64 */
# endif
# if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP)
# define MSWINRT_FLAVOR
# endif
# endif
# define mach_type_known
# endif
# if defined(_MSC_VER) && defined(_M_IA64)
# define IA64
# define MSWIN32 /* Really win64, but we don't treat 64-bit */
/* variants as a different platform. */
# endif
# endif
# if defined(__DJGPP__)
# define I386
# ifndef DJGPP
# define DJGPP /* MSDOS running the DJGPP port of GCC */
# endif
# define mach_type_known
# endif
# if defined(__CYGWIN32__) || defined(__CYGWIN__)
# if defined(__LP64__)
# define X86_64
# else
# define I386
# endif
# define CYGWIN32
# define mach_type_known
# endif
# if defined(__INTERIX)
# define I386
# define INTERIX
# define mach_type_known
# endif
# if defined(__MINGW32__) && !defined(mach_type_known)
# define I386
# define MSWIN32
# define mach_type_known
# endif
# if defined(__BORLANDC__)
# define I386
# define MSWIN32
# define mach_type_known
# endif
# if defined(_UTS) && !defined(mach_type_known)
# define S370
# define UTS4
# define mach_type_known
# endif
# if defined(__pj__) && !defined(CPPCHECK)
# error PicoJava no longer supported
/* The implementation had problems, and I haven't heard of users */
/* in ages. If you want it resurrected, let me know. */
# endif
# if defined(__embedded__) && defined(PPC)
# define POWERPC
# define NOSYS
# define mach_type_known
# endif
# if defined(__WATCOMC__) && defined(__386__)
# define I386
# if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
# if defined(__OS2__)
# define OS2
# else
# if defined(__WINDOWS_386__) || defined(__NT__)
# define MSWIN32
# else
# define DOS4GW
# endif
# endif
# endif
# define mach_type_known
# endif
# if defined(__s390__) && defined(LINUX)
# define S390
# define mach_type_known
# endif
# if defined(__GNU__)
# if defined(__i386__)
/* The Debian Hurd running on generic PC */
# define HURD
# define I386
# define mach_type_known
# endif
# endif
# if defined(__TANDEM)
/* Nonstop S-series */
/* FIXME: Should recognize Integrity series? */
# define MIPS
# define NONSTOP
# define mach_type_known
# endif
# if defined(__arc__) && defined(LINUX)
# define ARC
# define mach_type_known
# endif
# if defined(__hexagon__) && defined(LINUX)
# define HEXAGON
# define mach_type_known
# endif
# if defined(__tile__) && defined(LINUX)
# ifdef __tilegx__
# define TILEGX
# else
# define TILEPRO
# endif
# define mach_type_known
# endif
# if defined(__riscv) && (defined(FREEBSD) || defined(LINUX) \
|| defined(OPENBSD))
# define RISCV
# define mach_type_known
# endif
# if defined(SN_TARGET_PSP2)
# define mach_type_known
# endif
# if defined(NN_PLATFORM_CTR)
# define mach_type_known
# endif
# if defined(NN_BUILD_TARGET_PLATFORM_NX)
# define NINTENDO_SWITCH
# define mach_type_known
# endif
# if defined(SYMBIAN)
# define mach_type_known
# endif
# if defined(__EMSCRIPTEN__)
# define EMSCRIPTEN
# define I386
# define mach_type_known
# endif
/* Feel free to add more clauses here */
/* Or manually define the machine type here. A machine type is */
/* characterized by the architecture. Some */
/* machine types are further subdivided by OS. */
/* Macros such as LINUX, FREEBSD, etc. distinguish them. */
/* SYSV on an M68K actually means A/UX. */
/* The distinction in these cases is usually the stack starting address */
# if !defined(mach_type_known) && !defined(CPPCHECK)
# error The collector has not been ported to this machine/OS combination
# endif
/* Mapping is: M68K ==> Motorola 680X0 */
/* (NEXT, and SYSV (A/UX), */
/* MACOS and AMIGA variants) */
/* I386 ==> Intel 386 */
/* (SEQUENT, OS2, SCO, LINUX, NETBSD, */
/* FREEBSD, THREE86BSD, MSWIN32, */
/* BSDI, SOLARIS, NEXT and others) */
/* NS32K ==> Encore Multimax */
/* MIPS ==> R2000 through R14K */
/* (many variants) */
/* VAX ==> DEC VAX */
/* (BSD, ULTRIX variants) */
/* HP_PA ==> HP9000/700 & /800 */
/* HP/UX, LINUX */
/* SPARC ==> SPARC v7/v8/v9 */
/* (SOLARIS, LINUX, DRSNX variants) */
/* ALPHA ==> DEC Alpha */
/* (OSF1 and LINUX variants) */
/* LOONGARCH ==> Loongson LoongArch */
/* (LINUX 32- and 64-bit variants) */
/* M88K ==> Motorola 88XX0 */
/* (CX_UX and DGUX) */
/* S370 ==> 370-like machine */
/* running Amdahl UTS4 */
/* S390 ==> 390-like machine */
/* running LINUX */
/* AARCH64 ==> ARM AArch64 */
/* (LP64 and ILP32 variants) */
/* E2K ==> Elbrus 2000 */
/* running LINUX */
/* ARM32 ==> Intel StrongARM */
/* (many variants) */
/* IA64 ==> Intel IPF */
/* (e.g. Itanium) */
/* (LINUX and HPUX) */
/* SH ==> Hitachi SuperH */
/* (LINUX & MSWINCE) */
/* X86_64 ==> AMD x86-64 */
/* POWERPC ==> IBM/Apple PowerPC */
/* (MACOS(<=9),DARWIN(incl.MACOSX),*/
/* LINUX, NETBSD, AIX, NOSYS */
/* variants) */
/* Handles 32 and 64-bit variants. */
/* ARC ==> Synopsys ARC */
/* AVR32 ==> Atmel RISC 32-bit */
/* CRIS ==> Axis Etrax */
/* M32R ==> Renesas M32R */
/* NIOS2 ==> Altera NIOS2 */
/* HEXAGON ==> Qualcomm Hexagon */
/* OR1K ==> OpenRISC/or1k */
/* RISCV ==> RISC-V 32/64-bit */
/* TILEPRO ==> Tilera TILEPro */
/* TILEGX ==> Tilera TILE-Gx */
/*
* For each architecture and OS, the following need to be defined:
*
* CPP_WORDSZ is a simple integer constant representing the word size.
* in bits. We assume byte addressability, where a byte has 8 bits.
* We also assume CPP_WORDSZ is either 32 or 64.
* (We care about the length of pointers, not hardware
* bus widths. Thus a 64 bit processor with a C compiler that uses
* 32 bit pointers should use CPP_WORDSZ of 32, not 64. Default is 32.)
*
* MACH_TYPE is a string representation of the machine type.
* OS_TYPE is analogous for the OS.
*
* ALIGNMENT is the largest N, such that
* all pointer are guaranteed to be aligned on N byte boundaries.
* defining it to be 1 will always work, but perform poorly.
*
* DATASTART is the beginning of the data segment.
* On some platforms SEARCH_FOR_DATA_START is defined.
* The latter will cause GC_data_start to
* be set to an address determined by accessing data backwards from _end
* until an unmapped page is found. DATASTART will be defined to be
* GC_data_start.
* On UNIX-like systems, the collector will scan the area between DATASTART
* and DATAEND for root pointers.
*
* DATAEND, if not "end", where "end" is defined as "extern int end[]".
* RTH suggests gaining access to linker script synth'd values with
* this idiom instead of "&end", where "end" is defined as "extern int end".
* Otherwise, "GCC will assume these are in .sdata/.sbss" and it will, e.g.,
* cause failures on alpha*-*-* with -msmall-data or -fpic or mips-*-*
* without any special options.
*
* STACKBOTTOM is the cold end of the stack, which is usually the
* highest address in the stack.
* Under PCR or OS/2, we have other ways of finding thread stacks.
* For each machine, the following should:
* 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
* 2) define exactly one of
* STACKBOTTOM (should be defined to be an expression)
* LINUX_STACKBOTTOM
* HEURISTIC1
* HEURISTIC2
* If STACKBOTTOM is defined, then its value will be used directly (as the
* stack bottom). If LINUX_STACKBOTTOM is defined, then it will be determined
* with a method appropriate for most Linux systems. Currently we look
* first for __libc_stack_end (currently only if USE_LIBC_PRIVATES is
* defined), and if that fails read it from /proc. (If USE_LIBC_PRIVATES
* is not defined and NO_PROC_STAT is defined, we revert to HEURISTIC2.)
* If either of the last two macros are defined, then STACKBOTTOM is computed
* during collector startup using one of the following two heuristics:
* HEURISTIC1: Take an address inside GC_init's frame, and round it up to
* the next multiple of STACK_GRAN.
* HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly
* in small steps (decrement if STACK_GROWS_UP), and read the value
* at each location. Remember the value when the first
* Segmentation violation or Bus error is signaled. Round that
* to the nearest plausible page boundary, and use that instead
* of STACKBOTTOM.
*
* Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
* the value of environ is a pointer that can serve as STACKBOTTOM.
* I expect that HEURISTIC2 can be replaced by this approach, which
* interferes far less with debugging. However it has the disadvantage
* that it's confused by a putenv call before the collector is initialized.
* This could be dealt with by intercepting putenv ...
*
* If no expression for STACKBOTTOM can be found, and neither of the above
* heuristics are usable, the collector can still be used with all of the above
* undefined, provided one of the following is done:
* 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
* without reference to STACKBOTTOM. This is appropriate for use in
* conjunction with thread packages, since there will be multiple stacks.
* (Allocating thread stacks in the heap, and treating them as ordinary
* heap data objects is also possible as a last resort. However, this is
* likely to introduce significant amounts of excess storage retention
* unless the dead parts of the thread stacks are periodically cleared.)
* 2) Client code may set GC_stackbottom before calling any GC_ routines.
* If the author of the client code controls the main program, this is
* easily accomplished by introducing a new main program, setting
* GC_stackbottom to the address of a local variable, and then calling
* the original main program. The new main program would read something
* like (provided real_main() is not inlined by the compiler):
*
* #include "gc.h"
*
* main(argc, argv, envp)
* int argc;
* char **argv, **envp;
* {
* volatile int dummy;
*
* GC_stackbottom = (ptr_t)(&dummy);
* return(real_main(argc, argv, envp));
* }
*
*
* Each architecture may also define the style of virtual dirty bit
* implementation to be used:
* GWW_VDB: Use win32 GetWriteWatch primitive.
* MPROTECT_VDB: Write protect the heap and catch faults.
* PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
* SOFT_VDB: Use the Linux /proc primitives to track dirty bits.
*
* The first and second one may be combined, in which case a runtime
* selection will be made, based on GetWriteWatch availability.
*
* An architecture may define DYNAMIC_LOADING if dyn_load.c
* defined GC_register_dynamic_libraries() for the architecture.
*
* An architecture may define PREFETCH(x) to preload the cache with *x.
* This defaults to GCC built-in operation (or a no-op for other compilers).
*
* GC_PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
*
* An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
* clear the two words at GC_malloc-aligned address x. By default,
* word stores of 0 are used instead.
*
* HEAP_START may be defined as the initial address hint for mmap-based
* allocation.
*/
/* If available, we can use __builtin_unwind_init() to push the */
/* relevant registers onto the stack. */
# if GC_GNUC_PREREQ(2, 8) \
&& !GC_GNUC_PREREQ(11, 0) /* broken at least in 11.2.0 on cygwin64 */ \
&& !defined(__INTEL_COMPILER) && !defined(__PATHCC__) \
&& !defined(__FUJITSU) /* for FX10 system */ \
&& !(defined(POWERPC) && defined(DARWIN)) /* for MacOS X 10.3.9 */ \
&& !defined(E2K) && !defined(RTEMS) \
&& !defined(__ARMCC_VERSION) /* does not exist in armcc gnu emu */ \
&& (!defined(__clang__) \
|| GC_CLANG_PREREQ(8, 0) /* was no-op in clang-3 at least */)
# define HAVE_BUILTIN_UNWIND_INIT
# endif
/* The common OS-specific definitions (should be applicable to */
/* all (or most, at least) supported architectures). */
# ifdef CYGWIN32
# define OS_TYPE "CYGWIN32"
# define RETRY_GET_THREAD_CONTEXT
# ifdef USE_WINALLOC
# define GWW_VDB
# elif defined(USE_MMAP)
# define USE_MMAP_ANON
# endif
# endif /* CYGWIN32 */
# ifdef DARWIN
# define OS_TYPE "DARWIN"
# define DYNAMIC_LOADING
/* TODO: see get_end(3), get_etext() and get_end() should not be used. */
/* These aren't used when dyld support is enabled (it is by default). */
# define DATASTART ((ptr_t)get_etext())
# define DATAEND ((ptr_t)get_end())
# define USE_MMAP_ANON
EXTERN_C_END
# include <unistd.h>
EXTERN_C_BEGIN
# define GETPAGESIZE() (unsigned)getpagesize()
/* There seems to be some issues with trylock hanging on darwin. */
/* TODO: This should be looked into some more. */
# define NO_PTHREAD_TRYLOCK
# endif /* DARWIN */
# ifdef FREEBSD
# define OS_TYPE "FREEBSD"
# define FREEBSD_STACKBOTTOM
# ifdef __ELF__
# define DYNAMIC_LOADING
# endif
# if !defined(ALPHA) && !defined(SPARC)
extern char etext[];
# define DATASTART GC_FreeBSDGetDataStart(0x1000, (ptr_t)etext)
# define DATASTART_USES_BSDGETDATASTART
# ifndef GC_FREEBSD_THREADS
# define MPROTECT_VDB
# endif
# endif
# endif /* FREEBSD */
# ifdef HAIKU
# define OS_TYPE "HAIKU"
# define DYNAMIC_LOADING
# define MPROTECT_VDB
EXTERN_C_END
# include <OS.h>
EXTERN_C_BEGIN
# define GETPAGESIZE() (unsigned)B_PAGE_SIZE
# endif /* HAIKU */
# ifdef HPUX
# define OS_TYPE "HPUX"
extern int __data_start[];
# define DATASTART ((ptr_t)(__data_start))
# ifdef USE_MMAP
# define USE_MMAP_ANON
# endif
# define DYNAMIC_LOADING
EXTERN_C_END
# include <unistd.h>
EXTERN_C_BEGIN
# define GETPAGESIZE() (unsigned)sysconf(_SC_PAGE_SIZE)
# endif /* HPUX */
# ifdef LINUX
# define OS_TYPE "LINUX"
EXTERN_C_END
# include <features.h> /* for __GLIBC__ */
EXTERN_C_BEGIN
# if defined(FORCE_MPROTECT_BEFORE_MADVISE) \
|| defined(PREFER_MMAP_PROT_NONE)
# define COUNT_UNMAPPED_REGIONS
# endif
# define RETRY_TKILL_ON_EAGAIN
# if !defined(MIPS) && !defined(POWERPC)
# define LINUX_STACKBOTTOM
# endif
# if defined(__ELF__) && !defined(IA64)
# define DYNAMIC_LOADING
# endif
# if defined(__ELF__) && !defined(ARC) && !defined(RISCV) \
&& !defined(S390) && !defined(TILEGX) && !defined(TILEPRO)
extern int _end[];
# define DATAEND ((ptr_t)(_end))
# endif
# endif /* LINUX */
# ifdef MACOS
# define OS_TYPE "MACOS"
# ifndef __LOWMEM__
EXTERN_C_END
# include <LowMem.h>
EXTERN_C_BEGIN
# endif
/* See os_dep.c for details of global data segments. */
# define STACKBOTTOM ((ptr_t)LMGetCurStackBase())
# define DATAEND /* not needed */
# endif /* MACOS */
# ifdef MSWIN32
# define OS_TYPE "MSWIN32"
/* STACKBOTTOM and DATASTART are handled specially in os_dep.c. */
# define DATAEND /* not needed */
# define GWW_VDB
# endif
# ifdef MSWINCE
# define OS_TYPE "MSWINCE"
# define DATAEND /* not needed */
# endif
# ifdef NETBSD
# define OS_TYPE "NETBSD"
# define HEURISTIC2
# ifdef __ELF__
extern ptr_t GC_data_start;
# define DATASTART GC_data_start
# define DYNAMIC_LOADING
# elif !defined(MIPS) /* TODO: probably do not exclude it */
extern char etext[];
# define DATASTART ((ptr_t)(etext))
# endif
# endif /* NETBSD */
# ifdef NEXT
# define OS_TYPE "NEXT"
# define DATASTART ((ptr_t)get_etext())
# define DATASTART_IS_FUNC
# define DATAEND /* not needed */
# endif
# ifdef OPENBSD
# define OS_TYPE "OPENBSD"
# if !defined(M68K) /* TODO: probably do not exclude it */
# ifndef GC_OPENBSD_THREADS
# define HEURISTIC2
# endif
extern int __data_start[];
# define DATASTART ((ptr_t)__data_start)
extern int _end[];
# define DATAEND ((ptr_t)(&_end))
# define DYNAMIC_LOADING
# endif
# endif /* OPENBSD */
# ifdef SOLARIS
# define OS_TYPE "SOLARIS"
extern int _etext[], _end[];
ptr_t GC_SysVGetDataStart(size_t, ptr_t);
# define DATASTART_IS_FUNC
# define DATAEND ((ptr_t)(_end))
# if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
# define USE_MMAP 1
/* Otherwise we now use calloc. Mmap may result in the */
/* heap interleaved with thread stacks, which can result in */
/* excessive blacklisting. Sbrk is unusable since it */
/* doesn't interact correctly with the system malloc. */
# endif
# ifdef USE_MMAP
# define HEAP_START (ptr_t)0x40000000
# else
# define HEAP_START DATAEND
# endif
# ifndef GC_THREADS
# define MPROTECT_VDB
# endif
# define DYNAMIC_LOADING
/* Define STACKBOTTOM as (ptr_t)_start worked through 2.7, */
/* but reportedly breaks under 2.8. It appears that the stack */
/* base is a property of the executable, so this should not */
/* break old executables. */
/* HEURISTIC1 reportedly no longer works under Solaris 2.7. */
/* HEURISTIC2 probably works, but this appears to be preferable.*/
/* Apparently USRSTACK is defined to be USERLIMIT, but in some */
/* installations that's undefined. We work around this with a */
/* gross hack: */
EXTERN_C_END
# include <sys/vmparam.h>
# include <unistd.h>
EXTERN_C_BEGIN
# ifdef USERLIMIT
/* This should work everywhere, but doesn't. */
# define STACKBOTTOM ((ptr_t)USRSTACK)
# else
# define HEURISTIC2
# endif
# endif /* SOLARIS */
# define STACK_GRAN 0x1000000
# ifdef SYMBIAN
# define MACH_TYPE "SYMBIAN"
# define OS_TYPE "SYMBIAN"
# define CPP_WORDSZ 32
# define ALIGNMENT 4
# define DATASTART (ptr_t)ALIGNMENT /* cannot be null */
# define DATAEND (ptr_t)ALIGNMENT
# endif
# ifdef M68K
# define MACH_TYPE "M68K"
# define ALIGNMENT 2
# ifdef OPENBSD
# define HEURISTIC2
# ifdef __ELF__
extern ptr_t GC_data_start;
# define DATASTART GC_data_start
# define DYNAMIC_LOADING
# else
extern char etext[];
# define DATASTART ((ptr_t)(etext))
# endif
# endif
# ifdef NETBSD
/* Nothing specific. */
# endif
# ifdef LINUX
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# endif
# ifdef __ELF__
# if defined(__GLIBC__) && __GLIBC__ >= 2
# define SEARCH_FOR_DATA_START
# else /* !GLIBC2 */
extern char **__environ;
# define DATASTART ((ptr_t)(&__environ))
/* hideous kludge: __environ is the first */
/* word in crt0.o, and delimits the start */
/* of the data segment, no matter which */
/* ld options were passed through. */
/* We could use _etext instead, but that */
/* would include .rodata, which may */
/* contain large read-only data tables */
/* that we'd rather not scan. */
# endif /* !GLIBC2 */
# else
extern int etext[];
# define DATASTART ((ptr_t)((((word)(etext)) + 0xfff) & ~0xfff))
# endif
# endif
# ifdef AMIGA
# define OS_TYPE "AMIGA"
/* STACKBOTTOM and DATASTART handled specially */
/* in os_dep.c */
# define DATAEND /* not needed */
# define GETPAGESIZE() 4096
# endif
# ifdef MACOS
# define GETPAGESIZE() 4096
# endif
# ifdef NEXT
# define STACKBOTTOM ((ptr_t)0x4000000)
# endif
# endif
# ifdef POWERPC
# define MACH_TYPE "POWERPC"
# ifdef MACOS
# define ALIGNMENT 2 /* Still necessary? Could it be 4? */
# endif
# ifdef LINUX
# if defined(__powerpc64__)
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# else
# define ALIGNMENT 4
# endif
/* HEURISTIC1 has been reliably reported to fail for a 32-bit */
/* executable on a 64 bit kernel. */
# if defined(__bg__)
/* The Linux Compute Node Kernel (used on BlueGene systems) */
/* does not support LINUX_STACKBOTTOM way. */
# define HEURISTIC2
# define NO_PTHREAD_GETATTR_NP
# else
# define LINUX_STACKBOTTOM
# endif
# define SEARCH_FOR_DATA_START
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# endif
# ifndef SOFT_VDB
# define SOFT_VDB
# endif
# endif
# ifdef DARWIN
# if defined(__ppc64__)
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# define STACKBOTTOM ((ptr_t)0x7fff5fc00000)
# define CACHE_LINE_SIZE 64
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# else
# define ALIGNMENT 4
# define STACKBOTTOM ((ptr_t)0xc0000000)
# endif
# define MPROTECT_VDB
# if defined(USE_PPC_PREFETCH) && defined(__GNUC__)
/* The performance impact of prefetches is untested */
# define PREFETCH(x) \
__asm__ __volatile__ ("dcbt 0,%0" : : "r" ((const void *) (x)))
# define GC_PREFETCH_FOR_WRITE(x) \
__asm__ __volatile__ ("dcbtst 0,%0" : : "r" ((const void *) (x)))
# endif
# endif
# ifdef OPENBSD
# if defined(__powerpc64__)
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# else
# define ALIGNMENT 4
# endif
# endif
# ifdef FREEBSD
# if defined(__powerpc64__)
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# else
# define ALIGNMENT 4
# endif
# endif
# ifdef NETBSD
# define ALIGNMENT 4
# endif
# ifdef SN_TARGET_PS3
# define OS_TYPE "SN_TARGET_PS3"
# define NO_GETENV
# define CPP_WORDSZ 32
# define ALIGNMENT 4
extern int _end[];
extern int __bss_start;
# define DATASTART ((ptr_t)(__bss_start))
# define DATAEND ((ptr_t)(_end))
# define STACKBOTTOM ((ptr_t)ps3_get_stack_bottom())
# define NO_PTHREAD_TRYLOCK
/* Current GC LOCK() implementation for PS3 explicitly */
/* use pthread_mutex_lock for some reason. */
# endif
# ifdef AIX
# define OS_TYPE "AIX"
# undef ALIGNMENT /* in case it's defined */
# undef IA64
/* DOB: some AIX installs stupidly define IA64 in */
/* /usr/include/sys/systemcfg.h */
# ifdef __64BIT__
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# define STACKBOTTOM ((ptr_t)0x1000000000000000)
# else
# define ALIGNMENT 4
# define CPP_WORDSZ 32
# define STACKBOTTOM ((ptr_t)((ulong)&errno))
# endif
# define USE_MMAP_ANON
/* From AIX linker man page:
_text Specifies the first location of the program.
_etext Specifies the first location after the program.
_data Specifies the first location of the data.
_edata Specifies the first location after the initialized data
_end or end Specifies the first location after all data.
*/
extern int _data[], _end[];
# define DATASTART ((ptr_t)((ulong)_data))
# define DATAEND ((ptr_t)((ulong)_end))
extern int errno;
# define DYNAMIC_LOADING
/* For really old versions of AIX, this may have to be removed. */
# endif
# ifdef NOSYS
# define OS_TYPE "NOSYS"
# define ALIGNMENT 4
extern void __end[], __dso_handle[];
# define DATASTART ((ptr_t)__dso_handle) /* OK, that's ugly. */
# define DATAEND ((ptr_t)(__end))
/* Stack starts at 0xE0000000 for the simulator. */
# undef STACK_GRAN
# define STACK_GRAN 0x10000000
# define HEURISTIC1
# endif
# endif
# ifdef NACL
# define OS_TYPE "NACL"
# if defined(__GLIBC__)
# define DYNAMIC_LOADING
# endif
# define DATASTART ((ptr_t)0x10020000)
extern int _end[];
# define DATAEND ((ptr_t)_end)
# undef STACK_GRAN
# define STACK_GRAN 0x10000
# define HEURISTIC1
# define NO_PTHREAD_GETATTR_NP
# define USE_MMAP_ANON
# define GETPAGESIZE() 65536
# define MAX_NACL_GC_THREADS 1024
# endif
# ifdef VAX
# define MACH_TYPE "VAX"
# define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */
extern char etext[];
# define DATASTART ((ptr_t)(etext))
# ifdef BSD
# define OS_TYPE "BSD"
# define HEURISTIC1
/* HEURISTIC2 may be OK, but it's hard to test. */
# endif
# ifdef ULTRIX
# define OS_TYPE "ULTRIX"
# define STACKBOTTOM ((ptr_t)0x7fffc800)
# endif
# endif
# ifdef SPARC
# define MACH_TYPE "SPARC"
# if defined(__arch64__) || defined(__sparcv9)
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# define ELF_CLASS ELFCLASS64
# else
# define ALIGNMENT 4 /* Required by hardware */
# define CPP_WORDSZ 32
# endif
/* Don't define USE_ASM_PUSH_REGS. We do use an asm helper, but */
/* not to push the registers on the mark stack. */
# ifdef SOLARIS
# define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext)
# define PROC_VDB
# define GETPAGESIZE() (unsigned)sysconf(_SC_PAGESIZE)
/* getpagesize() appeared to be missing from at least */
/* one Solaris 5.4 installation. Weird. */
# endif
# ifdef DRSNX
# define OS_TYPE "DRSNX"
extern int etext[];
ptr_t GC_SysVGetDataStart(size_t, ptr_t);
# define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)etext)
# define DATASTART_IS_FUNC
# define MPROTECT_VDB
# define STACKBOTTOM ((ptr_t)0xdfff0000)
# define DYNAMIC_LOADING
# endif
# ifdef LINUX
# if !defined(__ELF__) && !defined(CPPCHECK)
# error Linux SPARC a.out not supported
# endif
# define SVR4
extern int _etext[];
ptr_t GC_SysVGetDataStart(size_t, ptr_t);
# ifdef __arch64__
# define DATASTART GC_SysVGetDataStart(0x100000, (ptr_t)_etext)
# else
# define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext)
# endif
# define DATASTART_IS_FUNC
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# ifdef NETBSD
/* Nothing specific. */
# endif
# ifdef FREEBSD
extern char etext[];
extern char edata[];
# if !defined(CPPCHECK)
extern char end[];
# endif
# define NEED_FIND_LIMIT
# define DATASTART ((ptr_t)(&etext))
void * GC_find_limit(void *, int);
# define DATAEND (ptr_t)GC_find_limit(DATASTART, TRUE)
# define DATAEND_IS_FUNC
# define GC_HAVE_DATAREGION2
# define DATASTART2 ((ptr_t)(&edata))
# define DATAEND2 ((ptr_t)(&end))
# endif
# endif
# ifdef I386
# define MACH_TYPE "I386"
# if (defined(__LP64__) || defined(_WIN64)) && !defined(CPPCHECK)
# error This should be handled as X86_64
# else
# define CPP_WORDSZ 32
# define ALIGNMENT 4
/* Appears to hold for all "32 bit" compilers */
/* except Borland. The -a4 option fixes */
/* Borland. For Watcom the option is -zp4. */
# endif
# ifdef SEQUENT
# define OS_TYPE "SEQUENT"
extern int etext[];
# define DATASTART ((ptr_t)((((word)(etext)) + 0xfff) & ~0xfff))
# define STACKBOTTOM ((ptr_t)0x3ffff000)
# endif
# ifdef EMSCRIPTEN
# define OS_TYPE "EMSCRIPTEN"
# define DATASTART (ptr_t)ALIGNMENT
# define DATAEND (ptr_t)ALIGNMENT
# define USE_MMAP_ANON /* avoid /dev/zero, not supported */
# define STACK_GROWS_DOWN
# endif
# if defined(__QNX__)
# define OS_TYPE "QNX"
# define SA_RESTART 0
# define HEURISTIC1
extern char etext[];
extern int _end[];
# define DATASTART ((ptr_t)etext)
# define DATAEND ((ptr_t)_end)
# endif
# ifdef HAIKU
extern int etext[];
# define DATASTART ((ptr_t)((((word)(etext)) + 0xfff) & ~0xfff))
# endif
# ifdef SOLARIS
# define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)_etext)
/* At least in Solaris 2.5, PROC_VDB gives wrong values for */
/* dirty bits. It appears to be fixed in 2.8 and 2.9. */
# ifdef SOLARIS25_PROC_VDB_BUG_FIXED
# define PROC_VDB
# endif
# endif
# ifdef SCO
# define OS_TYPE "SCO"
extern int etext[];
# define DATASTART ((ptr_t)((((word)(etext)) + 0x3fffff) & ~0x3fffff) \
+ ((word)(etext) & 0xfff))
# define STACKBOTTOM ((ptr_t)0x7ffffffc)
# endif
# ifdef SCO_ELF
# define OS_TYPE "SCO_ELF"
extern int etext[];
# define DATASTART ((ptr_t)(etext))
# define STACKBOTTOM ((ptr_t)0x08048000)
# define DYNAMIC_LOADING
# define ELF_CLASS ELFCLASS32
# endif
# ifdef DGUX
# define OS_TYPE "DGUX"
extern int _etext, _end;
ptr_t GC_SysVGetDataStart(size_t, ptr_t);
# define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)(&_etext))
# define DATASTART_IS_FUNC
# define DATAEND ((ptr_t)(&_end))
# define STACK_GROWS_DOWN
# define HEURISTIC2
EXTERN_C_END
# include <unistd.h>
EXTERN_C_BEGIN
# define GETPAGESIZE() (unsigned)sysconf(_SC_PAGESIZE)
# define DYNAMIC_LOADING
# ifndef USE_MMAP
# define USE_MMAP 1
# endif
# define MAP_FAILED (void *) ((word)-1)
# define HEAP_START (ptr_t)0x40000000
# endif /* DGUX */
# ifdef LINUX
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# else
/* We seem to get random errors in the incremental mode, */
/* possibly because the Linux threads implementation */
/* itself is a malloc client and cannot deal with the */
/* signals. fread() uses malloc too. */
# endif
# define HEAP_START (ptr_t)0x1000
/* This encourages mmap to give us low addresses, */
/* thus allowing the heap to grow to ~3 GB. */
# ifdef __ELF__
# if defined(__GLIBC__) && __GLIBC__ >= 2 \
|| defined(HOST_ANDROID) || defined(HOST_TIZEN)
# define SEARCH_FOR_DATA_START
# else
extern char **__environ;
# define DATASTART ((ptr_t)(&__environ))
/* hideous kludge: __environ is the first */
/* word in crt0.o, and delimits the start */
/* of the data segment, no matter which */
/* ld options were passed through. */
/* We could use _etext instead, but that */
/* would include .rodata, which may */
/* contain large read-only data tables */
/* that we'd rather not scan. */
# endif
# if !defined(GC_NO_SIGSETJMP) && (defined(HOST_TIZEN) \
|| (defined(HOST_ANDROID) \
&& !(GC_GNUC_PREREQ(4, 8) || GC_CLANG_PREREQ(3, 2) \
|| __ANDROID_API__ >= 18)))
/* Older Android NDK releases lack sigsetjmp in x86 libc */
/* (setjmp is used instead to find data_start). The bug */
/* is fixed in Android NDK r8e (so, ok to use sigsetjmp */
/* if gcc4.8+, clang3.2+ or Android API level 18+). */
# define GC_NO_SIGSETJMP 1
# endif
# else
extern int etext[];
# define DATASTART ((ptr_t)((((word)(etext)) + 0xfff) & ~0xfff))
# endif
# ifdef USE_I686_PREFETCH
# define PREFETCH(x) \
__asm__ __volatile__ ("prefetchnta %0" : : "m"(*(char *)(x)))
/* Empirically prefetcht0 is much more effective at reducing */
/* cache miss stalls for the targeted load instructions. But it */
/* seems to interfere enough with other cache traffic that the */
/* net result is worse than prefetchnta. */
# ifdef FORCE_WRITE_PREFETCH
/* Using prefetches for write seems to have a slight negative */
/* impact on performance, at least for a PIII/500. */
# define GC_PREFETCH_FOR_WRITE(x) \
__asm__ __volatile__ ("prefetcht0 %0" : : "m"(*(char *)(x)))
# else
# define GC_NO_PREFETCH_FOR_WRITE
# endif
# elif defined(USE_3DNOW_PREFETCH)
# define PREFETCH(x) \
__asm__ __volatile__ ("prefetch %0" : : "m"(*(char *)(x)))
# define GC_PREFETCH_FOR_WRITE(x) \
__asm__ __volatile__ ("prefetchw %0" : : "m"(*(char *)(x)))
# endif
# if defined(__GLIBC__) && !defined(__UCLIBC__) \
&& !defined(GLIBC_TSX_BUG_FIXED)
/* Workaround lock elision implementation for some glibc. */
# define GLIBC_2_19_TSX_BUG
EXTERN_C_END
# include <gnu/libc-version.h> /* for gnu_get_libc_version() */
EXTERN_C_BEGIN
# endif
# ifndef SOFT_VDB
# define SOFT_VDB
# endif
# endif
# ifdef CYGWIN32
# define WOW64_THREAD_CONTEXT_WORKAROUND
# define DATASTART ((ptr_t)GC_DATASTART) /* From gc.h */
# define DATAEND ((ptr_t)GC_DATAEND)
# ifndef USE_WINALLOC
# /* MPROTECT_VDB does not work, it leads to a spurious exit. */
# ifdef USE_MMAP
# define NEED_FIND_LIMIT
# endif
# endif
# endif
# ifdef INTERIX
# define OS_TYPE "INTERIX"
extern int _data_start__[];
extern int _bss_end__[];
# define DATASTART ((ptr_t)_data_start__)
# define DATAEND ((ptr_t)_bss_end__)
# define STACKBOTTOM ({ ptr_t rv; \
__asm__ __volatile__ ("movl %%fs:4, %%eax" \
: "=a" (rv)); \
rv; })
# define USE_MMAP_ANON
# endif
# ifdef OS2
# define OS_TYPE "OS2"
/* STACKBOTTOM and DATASTART are handled specially in */
/* os_dep.c. OS2 actually has the right */
/* system call! */
# define DATAEND /* not needed */
# endif
# ifdef MSWIN32
# define WOW64_THREAD_CONTEXT_WORKAROUND
# define RETRY_GET_THREAD_CONTEXT
# define MPROTECT_VDB
# endif
# ifdef MSWINCE
/* Nothing specific. */
# endif
# ifdef DJGPP
# define OS_TYPE "DJGPP"
EXTERN_C_END
# include "stubinfo.h"
EXTERN_C_BEGIN
extern int etext[];
extern int _stklen;
extern int __djgpp_stack_limit;
# define DATASTART ((ptr_t)((((word)(etext)) + 0x1ff) & ~0x1ff))
/* #define STACKBOTTOM ((ptr_t)((word)_stubinfo+_stubinfo->size+_stklen)) */
# define STACKBOTTOM ((ptr_t)((word)__djgpp_stack_limit + _stklen))
/* This may not be right. */
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# ifdef FREEBSD
# ifdef __GLIBC__
extern int _end[];
# define DATAEND ((ptr_t)(_end))
# endif
# endif
# ifdef NETBSD
/* Nothing specific. */
# endif
# ifdef THREE86BSD
# define OS_TYPE "THREE86BSD"
# define HEURISTIC2
extern char etext[];
# define DATASTART ((ptr_t)(etext))
# endif
# ifdef BSDI
# define OS_TYPE "BSDI"
# define HEURISTIC2
extern char etext[];
# define DATASTART ((ptr_t)(etext))
# endif
# ifdef NEXT
# define STACKBOTTOM ((ptr_t)0xc0000000)
# endif
# ifdef RTEMS
# define OS_TYPE "RTEMS"
EXTERN_C_END
# include <sys/unistd.h>
EXTERN_C_BEGIN
extern int etext[];
void *rtems_get_stack_bottom(void);
# define InitStackBottom rtems_get_stack_bottom()
# define DATASTART ((ptr_t)etext)
# define STACKBOTTOM ((ptr_t)InitStackBottom)
# endif
# ifdef DOS4GW
# define OS_TYPE "DOS4GW"
extern long __nullarea;
extern char _end;
extern char *_STACKTOP;
/* Depending on calling conventions Watcom C either precedes */
/* or does not precedes with underscore names of C-variables. */
/* Make sure startup code variables always have the same names. */
#pragma aux __nullarea "*";
#pragma aux _end "*";
# define STACKBOTTOM ((ptr_t)_STACKTOP)
/* confused? me too. */
# define DATASTART ((ptr_t)(&__nullarea))
# define DATAEND ((ptr_t)(&_end))
# endif
# ifdef HURD
# define OS_TYPE "HURD"
# define STACK_GROWS_DOWN
# define HEURISTIC2
# define SEARCH_FOR_DATA_START
extern int _end[];
# define DATAEND ((ptr_t)(_end))
/* # define MPROTECT_VDB Not quite working yet? */
# define DYNAMIC_LOADING
# define USE_MMAP_ANON
# endif
# ifdef DARWIN
# define DARWIN_DONT_PARSE_STACK 1
# define STACKBOTTOM ((ptr_t)0xc0000000)
# define MPROTECT_VDB
# if TARGET_OS_IPHONE && !defined(NO_DYLD_BIND_FULLY_IMAGE)
/* iPhone/iPad simulator */
# define NO_DYLD_BIND_FULLY_IMAGE
# endif
# endif /* DARWIN */
# endif
# ifdef NS32K
# define MACH_TYPE "NS32K"
# define ALIGNMENT 4
extern char **environ;
# define DATASTART ((ptr_t)(&environ))
/* hideous kludge: environ is the first */
/* word in crt0.o, and delimits the start */
/* of the data segment, no matter which */
/* ld options were passed through. */
# define STACKBOTTOM ((ptr_t)0xfffff000) /* for Encore */
# endif
# ifdef LOONGARCH
# define MACH_TYPE "LoongArch"
# ifdef LINUX
# pragma weak __data_start
extern int __data_start[];
# define DATASTART ((ptr_t)(__data_start))
# define CPP_WORDSZ _LOONGARCH_SZPTR
# define ALIGNMENT (_LOONGARCH_SZPTR/8)
# endif
# endif /* LOONGARCH */
# ifdef MIPS
# define MACH_TYPE "MIPS"
# ifdef LINUX
# pragma weak __data_start
extern int __data_start[];
# define DATASTART ((ptr_t)(__data_start))
# ifdef _MIPS_SZPTR
# define CPP_WORDSZ _MIPS_SZPTR
# define ALIGNMENT (_MIPS_SZPTR/8)
# else
# define ALIGNMENT 4
# endif
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2
# define LINUX_STACKBOTTOM
# else
# define STACKBOTTOM ((ptr_t)0x7fff8000)
# endif
# endif /* Linux */
# ifdef EWS4800
# define OS_TYPE "EWS4800"
# define HEURISTIC2
# if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
extern int _fdata[], _end[];
# define DATASTART ((ptr_t)_fdata)
# define DATAEND ((ptr_t)_end)
# define CPP_WORDSZ _MIPS_SZPTR
# define ALIGNMENT (_MIPS_SZPTR/8)
# else
extern int etext[], edata[];
# if !defined(CPPCHECK)
extern int end[];
# endif
extern int _DYNAMIC_LINKING[], _gp[];
# define DATASTART ((ptr_t)((((word)(etext) + 0x3ffff) & ~0x3ffff) \
+ ((word)(etext) & 0xffff)))
# define DATAEND ((ptr_t)(edata))
# define GC_HAVE_DATAREGION2
# define DATASTART2 (_DYNAMIC_LINKING \
? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \
: (ptr_t)edata)
# define DATAEND2 ((ptr_t)(end))
# define ALIGNMENT 4
# endif
# endif
# ifdef ULTRIX
# define OS_TYPE "ULTRIX"
# define HEURISTIC2
# define DATASTART ((ptr_t)0x10000000)
/* Could probably be slightly higher since */
/* startup code allocates lots of stuff. */
# define ALIGNMENT 4
# endif
# ifdef IRIX5
# define OS_TYPE "IRIX5"
# define HEURISTIC2
extern int _fdata[];
# define DATASTART ((ptr_t)(_fdata))
# ifdef USE_MMAP
# define HEAP_START (ptr_t)0x30000000
# else
# define HEAP_START DATASTART
# endif
/* Lowest plausible heap address. */
/* In the MMAP case, we map there. */
/* In either case it is used to identify */
/* heap sections so they're not */
/* considered as roots. */
/*# define MPROTECT_VDB DOB: this should work, but there is evidence */
/* of recent breakage. */
# ifdef _MIPS_SZPTR
# define CPP_WORDSZ _MIPS_SZPTR
# define ALIGNMENT (_MIPS_SZPTR/8)
# else
# define ALIGNMENT 4
# endif
# define DYNAMIC_LOADING
# endif
# ifdef MSWINCE
# define ALIGNMENT 4
# endif
# ifdef NETBSD
# define ALIGNMENT 4
# ifndef __ELF__
# define DATASTART ((ptr_t)0x10000000)
# define STACKBOTTOM ((ptr_t)0x7ffff000)
# endif
# endif
# ifdef OPENBSD
# define CPP_WORDSZ 64 /* all OpenBSD/mips platforms are 64-bit */
# define ALIGNMENT 8
# endif
# ifdef FREEBSD
# define ALIGNMENT 4
# endif
# ifdef NONSTOP
# define OS_TYPE "NONSTOP"
# define CPP_WORDSZ 32
# define ALIGNMENT 4
# define DATASTART ((ptr_t)0x08000000)
extern char **environ;
# define DATAEND ((ptr_t)(environ - 0x10))
# define STACKBOTTOM ((ptr_t)0x4fffffff)
# endif
# endif
# ifdef NIOS2
# define CPP_WORDSZ 32
# define MACH_TYPE "NIOS2"
# ifdef LINUX
extern int __data_start[];
# define DATASTART ((ptr_t)(__data_start))
# define ALIGNMENT 4
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# endif
# endif /* NIOS2 */
# ifdef OR1K
# define CPP_WORDSZ 32
# define MACH_TYPE "OR1K"
# ifdef LINUX
extern int __data_start[];
# define DATASTART ((ptr_t)(__data_start))
# define ALIGNMENT 4
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# endif
# endif /* OR1K */
# ifdef HP_PA
# define MACH_TYPE "HP_PA"
# ifdef __LP64__
# define CPP_WORDSZ 64
# define ALIGNMENT 8
# else
# define CPP_WORDSZ 32
# define ALIGNMENT 4
# endif
# define STACK_GROWS_UP
# ifdef HPUX
# ifndef GC_THREADS
# define MPROTECT_VDB
# endif
# ifdef USE_HPUX_FIXED_STACKBOTTOM
/* The following appears to work for 7xx systems running HP/UX */
/* 9.xx. Furthermore, it might result in much faster */
/* collections than HEURISTIC2, which may involve scanning */
/* segments that directly precede the stack. It is not the */
/* default, since it may not work on older machine/OS */
/* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
/* this.) */
/* This technique also doesn't work with HP/UX 11.xx. The */
/* stack size is settable using the kernel maxssiz variable, */
/* and in 11.23 and latter, the size can be set dynamically. */
/* It also doesn't handle SHMEM_MAGIC binaries which have */
/* stack and data in the first quadrant. */
# define STACKBOTTOM ((ptr_t)0x7b033000) /* from /etc/conf/h/param.h */
# elif defined(USE_ENVIRON_POINTER)
/* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
/* to this. Note that the GC must be initialized before the */
/* first putenv call. Unfortunately, some clients do not obey. */
extern char ** environ;
# define STACKBOTTOM ((ptr_t)environ)
# elif !defined(HEURISTIC2)
/* This uses pst_vm_status support. */
# define HPUX_MAIN_STACKBOTTOM
# define NEED_FIND_LIMIT
# endif
# ifndef __GNUC__
# define PREFETCH(x) do { \
register long addr = (long)(x); \
(void) _asm ("LDW", 0, 0, addr, 0); \
} while (0)
# endif
# endif /* HPUX */
# ifdef LINUX
# define SEARCH_FOR_DATA_START
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# endif /* HP_PA */
# ifdef ALPHA
# define MACH_TYPE "ALPHA"
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# ifdef NETBSD
# define ELFCLASS32 32
# define ELFCLASS64 64
# define ELF_CLASS ELFCLASS64
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# ifdef FREEBSD
/* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */
/* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */
extern char etext[];
extern char edata[];
# if !defined(CPPCHECK)
extern char end[];
# endif
# define NEED_FIND_LIMIT
# define DATASTART ((ptr_t)(&etext))
void * GC_find_limit(void *, int);
# define DATAEND (ptr_t)GC_find_limit(DATASTART, TRUE)
# define DATAEND_IS_FUNC
# define GC_HAVE_DATAREGION2
# define DATASTART2 ((ptr_t)(&edata))
# define DATAEND2 ((ptr_t)(&end))
# endif
# ifdef OSF1
# define OS_TYPE "OSF1"
# define DATASTART ((ptr_t)0x140000000)
extern int _end[];
# define DATAEND ((ptr_t)(&_end))
extern char ** environ;
EXTERN_C_END
# include <unistd.h>
EXTERN_C_BEGIN
/* round up from the value of environ to the nearest page boundary */
/* Probably breaks if putenv is called before collector */
/* initialization. */
# define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1))
/* # define HEURISTIC2 */
/* Normally HEURISTIC2 is too conservative, since */
/* the text segment immediately follows the stack. */
/* Hence we give an upper pound. */
/* This is currently unused, since we disabled HEURISTIC2 */
extern int __start[];
# define HEURISTIC2_LIMIT ((ptr_t)((word)(__start) & ~(getpagesize()-1)))
# ifndef GC_OSF1_THREADS
/* Unresolved signal issues with threads. */
# define MPROTECT_VDB
# endif
# define DYNAMIC_LOADING
# endif
# ifdef LINUX
# ifdef __ELF__
# define SEARCH_FOR_DATA_START
# else
# define DATASTART ((ptr_t)0x140000000)
extern int _end[];
# define DATAEND ((ptr_t)(_end))
# endif
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
/* Has only been superficially tested. May not */
/* work on all versions. */
# endif
# endif
# endif /* ALPHA */
# ifdef IA64
# define MACH_TYPE "IA64"
# ifdef HPUX
# ifdef _ILP32
# define CPP_WORDSZ 32
/* Requires 8 byte alignment for malloc */
# define ALIGNMENT 4
# else
# if !defined(_LP64) && !defined(CPPCHECK)
# error Unknown ABI
# endif
# define CPP_WORDSZ 64
/* Requires 16 byte alignment for malloc */
# define ALIGNMENT 8
# endif
/* Note that the GC must be initialized before the 1st putenv call. */
extern char ** environ;
# define STACKBOTTOM ((ptr_t)environ)
# define HPUX_STACKBOTTOM
/* The following was empirically determined, and is probably */
/* not very robust. */
/* Note that the backing store base seems to be at a nice */
/* address minus one page. */
# define BACKING_STORE_DISPLACEMENT 0x1000000
# define BACKING_STORE_ALIGNMENT 0x1000
extern ptr_t GC_register_stackbottom;
# define BACKING_STORE_BASE GC_register_stackbottom
/* Known to be wrong for recent HP/UX versions!!! */
# endif
# ifdef LINUX
# define CPP_WORDSZ 64
# define ALIGNMENT 8
/* The following works on NUE and older kernels: */
/* define STACKBOTTOM ((ptr_t)0xa000000000000000l) */
/* TODO: LINUX_STACKBOTTOM does not work on NUE. */
/* We also need the base address of the register stack */
/* backing store. */
extern ptr_t GC_register_stackbottom;
# define BACKING_STORE_BASE GC_register_stackbottom
# define SEARCH_FOR_DATA_START
# ifdef __GNUC__
# define DYNAMIC_LOADING
# else
/* In the Intel compiler environment, we seem to end up with */
/* statically linked executables and an undefined reference */
/* to _DYNAMIC */
# endif
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
/* Requires Linux 2.3.47 or later. */
# endif
# ifdef __GNUC__
# ifndef __INTEL_COMPILER
# define PREFETCH(x) \
__asm__ (" lfetch [%0]": : "r"(x))
# define GC_PREFETCH_FOR_WRITE(x) \
__asm__ (" lfetch.excl [%0]": : "r"(x))
# define CLEAR_DOUBLE(x) \
__asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
# else
EXTERN_C_END
# include <ia64intrin.h>
EXTERN_C_BEGIN
# define PREFETCH(x) __lfetch(__lfhint_none, (x))
# define GC_PREFETCH_FOR_WRITE(x) __lfetch(__lfhint_nta, (x))
# define CLEAR_DOUBLE(x) __stf_spill((void *)(x), 0)
# endif /* __INTEL_COMPILER */
# endif
# endif
# ifdef MSWIN32
/* FIXME: This is a very partial guess. There is no port, yet. */
# if defined(_WIN64)
# define CPP_WORDSZ 64
# else
# define CPP_WORDSZ 32 /* Is this possible? */
# endif
# define ALIGNMENT 8
# endif
# endif
# ifdef E2K
# define MACH_TYPE "E2K"
# define CPP_WORDSZ 64
# define ALIGNMENT 8
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# ifdef LINUX
extern int __dso_handle[];
# define DATASTART ((ptr_t)__dso_handle)
# endif
# endif /* E2K */
# ifdef M88K
# define MACH_TYPE "M88K"
# define ALIGNMENT 4
# define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
extern int etext[];
# ifdef CX_UX
# define OS_TYPE "CX_UX"
# define DATASTART ((ptr_t)((((word)(etext) + 0x3fffff) & ~0x3fffff) \
+ 0x10000))
# endif
# ifdef DGUX
# define OS_TYPE "DGUX"
ptr_t GC_SysVGetDataStart(size_t, ptr_t);
# define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)etext)
# define DATASTART_IS_FUNC
# endif
# endif
# ifdef S370
/* If this still works, and if anyone cares, this should probably */
/* be moved to the S390 category. */
# define MACH_TYPE "S370"
# define ALIGNMENT 4 /* Required by hardware */
# ifdef UTS4
# define OS_TYPE "UTS4"
extern int etext[];
extern int _etext[];
extern int _end[];
ptr_t GC_SysVGetDataStart(size_t, ptr_t);
# define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext)
# define DATASTART_IS_FUNC
# define DATAEND ((ptr_t)(_end))
# define HEURISTIC2
# endif
# endif
# ifdef S390
# define MACH_TYPE "S390"
# ifndef __s390x__
# define ALIGNMENT 4
# define CPP_WORDSZ 32
# else
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# endif
# ifdef LINUX
extern int __data_start[] __attribute__((__weak__));
# define DATASTART ((ptr_t)(__data_start))
extern int _end[] __attribute__((__weak__));
# define DATAEND ((ptr_t)(_end))
# define CACHE_LINE_SIZE 256
# define GETPAGESIZE() 4096
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# endif
# ifndef SOFT_VDB
# define SOFT_VDB
# endif
# endif
# endif /* S390 */
# ifdef AARCH64
# define MACH_TYPE "AARCH64"
# ifdef __ILP32__
# define CPP_WORDSZ 32
# define ALIGNMENT 4
# else
# define CPP_WORDSZ 64
# define ALIGNMENT 8
# endif
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# ifdef LINUX
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# endif
# if defined(HOST_ANDROID)
# define SEARCH_FOR_DATA_START
# else
extern int __data_start[] __attribute__((__weak__));
# define DATASTART ((ptr_t)__data_start)
# endif
# endif
# ifdef DARWIN
/* iOS */
# define DARWIN_DONT_PARSE_STACK 1
# define STACKBOTTOM ((ptr_t)0x16fdfffff)
/* MPROTECT_VDB causes use of non-public API like exc_server, */
/* this could be a reason for blocking the client application in */
/* the store. */
# if TARGET_OS_IPHONE && !defined(NO_DYLD_BIND_FULLY_IMAGE)
# define NO_DYLD_BIND_FULLY_IMAGE
# endif
# endif
# ifdef FREEBSD
/* Nothing specific. */
# endif
# ifdef NETBSD
# define ELF_CLASS ELFCLASS64
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# ifdef NINTENDO_SWITCH
# define OS_TYPE "NINTENDO_SWITCH"
extern int __bss_end[];
# define NO_HANDLE_FORK 1
# define DATASTART (ptr_t)ALIGNMENT /* cannot be null */
# define DATAEND (ptr_t)(&__bss_end)
void *switch_get_stack_bottom(void);
# define STACKBOTTOM ((ptr_t)switch_get_stack_bottom())
# endif
# ifdef MSWIN32 /* UWP */
/* TODO: Enable MPROTECT_VDB */
# endif
# ifdef NOSYS
# define OS_TYPE "NOSYS"
/* __data_start is usually defined in the target linker script. */
extern int __data_start[];
# define DATASTART ((ptr_t)__data_start)
extern void *__stack_base__;
# define STACKBOTTOM ((ptr_t)__stack_base__)
# endif
# endif
# ifdef ARM32
# if defined(NACL)
# define MACH_TYPE "NACL"
# else
# define MACH_TYPE "ARM32"
# endif
# define CPP_WORDSZ 32
# define ALIGNMENT 4
# ifdef NETBSD
/* Nothing specific. */
# endif
# ifdef LINUX
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# endif
# if defined(__GLIBC__) && __GLIBC__ >= 2 \
|| defined(HOST_ANDROID) || defined(HOST_TIZEN)
# define SEARCH_FOR_DATA_START
# else
extern char **__environ;
# define DATASTART ((ptr_t)(&__environ))
/* hideous kludge: __environ is the first */
/* word in crt0.o, and delimits the start */
/* of the data segment, no matter which */
/* ld options were passed through. */
/* We could use _etext instead, but that */
/* would include .rodata, which may */
/* contain large read-only data tables */
/* that we'd rather not scan. */
# endif
# endif
# ifdef MSWINCE
/* Nothing specific. */
# endif
# ifdef FREEBSD
/* Nothing specific. */
# endif
# ifdef DARWIN
/* iOS */
# define DARWIN_DONT_PARSE_STACK 1
# define STACKBOTTOM ((ptr_t)0x30000000)
/* MPROTECT_VDB causes use of non-public API. */
# if TARGET_OS_IPHONE && !defined(NO_DYLD_BIND_FULLY_IMAGE)
# define NO_DYLD_BIND_FULLY_IMAGE
# endif
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# ifdef SN_TARGET_PSP2
# define OS_TYPE "SN_TARGET_PSP2"
# define NO_HANDLE_FORK 1
# define DATASTART (ptr_t)ALIGNMENT
# define DATAEND (ptr_t)ALIGNMENT
void *psp2_get_stack_bottom(void);
# define STACKBOTTOM ((ptr_t)psp2_get_stack_bottom())
# endif
# ifdef NN_PLATFORM_CTR
# define OS_TYPE "NN_PLATFORM_CTR"
extern unsigned char Image$$ZI$$ZI$$Base[];
# define DATASTART (ptr_t)(Image$$ZI$$ZI$$Base)
extern unsigned char Image$$ZI$$ZI$$Limit[];
# define DATAEND (ptr_t)(Image$$ZI$$ZI$$Limit)
void *n3ds_get_stack_bottom(void);
# define STACKBOTTOM ((ptr_t)n3ds_get_stack_bottom())
# endif
# ifdef MSWIN32 /* UWP */
/* TODO: Enable MPROTECT_VDB */
# endif
# ifdef NOSYS
# define OS_TYPE "NOSYS"
/* __data_start is usually defined in the target linker script. */
extern int __data_start[];
# define DATASTART ((ptr_t)(__data_start))
/* __stack_base__ is set in newlib/libc/sys/arm/crt0.S */
extern void *__stack_base__;
# define STACKBOTTOM ((ptr_t)(__stack_base__))
# endif
#endif
# ifdef CRIS
# define MACH_TYPE "CRIS"
# define CPP_WORDSZ 32
# define ALIGNMENT 1
# ifdef LINUX
# define SEARCH_FOR_DATA_START
# endif
# endif /* CRIS */
# if defined(SH) && !defined(SH4)
# define MACH_TYPE "SH"
# define ALIGNMENT 4
# ifdef LINUX
# define SEARCH_FOR_DATA_START
# endif
# ifdef NETBSD
/* Nothing specific. */
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# ifdef MSWINCE
/* Nothing specific. */
# endif
# endif
# ifdef SH4
# define MACH_TYPE "SH4"
# define ALIGNMENT 4
# ifdef MSWINCE
/* Nothing specific. */
# endif
# endif
# ifdef AVR32
# define MACH_TYPE "AVR32"
# define CPP_WORDSZ 32
# define ALIGNMENT 4
# ifdef LINUX
# define SEARCH_FOR_DATA_START
# endif
# endif /* AVR32 */
# ifdef M32R
# define CPP_WORDSZ 32
# define MACH_TYPE "M32R"
# define ALIGNMENT 4
# ifdef LINUX
# define SEARCH_FOR_DATA_START
# endif
# endif /* M32R */
# ifdef X86_64
# define MACH_TYPE "X86_64"
# ifdef __ILP32__
# define ALIGNMENT 4
# define CPP_WORDSZ 32
# else
# define ALIGNMENT 8
# define CPP_WORDSZ 64
# endif
# ifndef HBLKSIZE
# define HBLKSIZE 4096
# endif
# ifndef CACHE_LINE_SIZE
# define CACHE_LINE_SIZE 64
# endif
# ifdef PLATFORM_GETMEM
# define OS_TYPE "PLATFORM_GETMEM"
# define DATASTART (ptr_t)ALIGNMENT
# define DATAEND (ptr_t)ALIGNMENT
EXTERN_C_END
# include <pthread.h>
EXTERN_C_BEGIN
void *platform_get_stack_bottom(void);
# define STACKBOTTOM ((ptr_t)platform_get_stack_bottom())
# endif
# ifdef LINUX
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# else
/* We seem to get random errors in the incremental mode, */
/* possibly because the Linux threads implementation */
/* itself is a malloc client and cannot deal with the */
/* signals. fread() uses malloc too. */
# endif
# define SEARCH_FOR_DATA_START
# if defined(__GLIBC__) && !defined(__UCLIBC__)
/* A workaround for GCF (Google Cloud Function) which does */
/* not support mmap() for "/dev/zero". Should not cause any */
/* harm to other targets. */
# define USE_MMAP_ANON
# endif
# if defined(__GLIBC__) && !defined(__UCLIBC__) \
&& !defined(GETCONTEXT_FPU_BUG_FIXED)
/* At present, there's a bug in GLibc getcontext() on */
/* Linux/x64 (it clears FPU exception mask). We define this */
/* macro to workaround it. */
/* TODO: This seems to be fixed in GLibc v2.14. */
# define GETCONTEXT_FPU_EXCMASK_BUG
# endif
# if defined(__GLIBC__) && !defined(__UCLIBC__) \
&& !defined(GLIBC_TSX_BUG_FIXED)
/* Workaround lock elision implementation for some glibc. */
# define GLIBC_2_19_TSX_BUG
EXTERN_C_END
# include <gnu/libc-version.h> /* for gnu_get_libc_version() */
EXTERN_C_BEGIN
# endif
# ifndef SOFT_VDB
# define SOFT_VDB
# endif
# endif
# ifdef DARWIN
# define DARWIN_DONT_PARSE_STACK 1
# define STACKBOTTOM ((ptr_t)0x7fff5fc00000)
# define MPROTECT_VDB
# if TARGET_OS_IPHONE && !defined(NO_DYLD_BIND_FULLY_IMAGE)
/* iPhone/iPad simulator */
# define NO_DYLD_BIND_FULLY_IMAGE
# endif
# endif
# ifdef FREEBSD
# ifdef __GLIBC__
extern int _end[];
# define DATAEND ((ptr_t)(_end))
# endif
# if defined(__DragonFly__)
/* DragonFly BSD still has vm.max_proc_mmap, according to */
/* its mmap(2) man page. */
# define COUNT_UNMAPPED_REGIONS
# endif
# endif
# ifdef NETBSD
/* Nothing specific. */
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# ifdef HAIKU
# define HEURISTIC2
# define SEARCH_FOR_DATA_START
# endif
# ifdef SOLARIS
# define ELF_CLASS ELFCLASS64
# define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)_etext)
# ifdef SOLARIS25_PROC_VDB_BUG_FIXED
# define PROC_VDB
# endif
# endif
# ifdef CYGWIN32
# ifndef USE_WINALLOC
# if defined(THREAD_LOCAL_ALLOC)
/* TODO: For an unknown reason, thread-local allocations */
/* lead to spurious process exit after the fault handler is */
/* once invoked. */
# else
# define MPROTECT_VDB
# endif
# endif
# endif
# ifdef MSWIN_XBOX1
# define OS_TYPE "MSWIN_XBOX1"
# define NO_GETENV
# define DATASTART (ptr_t)ALIGNMENT
# define DATAEND (ptr_t)ALIGNMENT
LONG64 durango_get_stack_bottom(void);
# define STACKBOTTOM ((ptr_t)durango_get_stack_bottom())
# define GETPAGESIZE() 4096
# ifndef USE_MMAP
# define USE_MMAP 1
# endif
/* The following is from sys/mman.h: */
# define PROT_NONE 0
# define PROT_READ 1
# define PROT_WRITE 2
# define PROT_EXEC 4
# define MAP_PRIVATE 2
# define MAP_FIXED 0x10
# define MAP_FAILED ((void *)-1)
# endif
# ifdef MSWIN32
# define RETRY_GET_THREAD_CONTEXT
# if !defined(__GNUC__) || defined(__INTEL_COMPILER) \
|| (GC_GNUC_PREREQ(4, 7) && !defined(__MINGW64__))
/* Older GCC and Mingw-w64 (both GCC and Clang) do not */
/* support SetUnhandledExceptionFilter() properly on x64. */
# define MPROTECT_VDB
# endif
# endif
# endif /* X86_64 */
# ifdef ARC
# define CPP_WORDSZ 32
# define MACH_TYPE "ARC"
# define ALIGNMENT 4
# define CACHE_LINE_SIZE 64
# ifdef LINUX
extern int __data_start[] __attribute__((__weak__));
# define DATASTART ((ptr_t)__data_start)
# endif
# endif /* ARC */
# ifdef HEXAGON
# define CPP_WORDSZ 32
# define MACH_TYPE "HEXAGON"
# define ALIGNMENT 4
# ifdef LINUX
# if !defined(REDIRECT_MALLOC)
# define MPROTECT_VDB
# endif
# if defined(__GLIBC__)
# define SEARCH_FOR_DATA_START
# elif !defined(CPPCHECK)
# error Unknown Hexagon libc configuration
# endif
# endif
# endif /* HEXAGON */
# ifdef TILEPRO
# define CPP_WORDSZ 32
# define MACH_TYPE "TILEPro"
# define ALIGNMENT 4
# define PREFETCH(x) __insn_prefetch(x)
# define CACHE_LINE_SIZE 64
# ifdef LINUX
extern int __data_start[];
# define DATASTART ((ptr_t)__data_start)
# endif
# endif /* TILEPRO */
# ifdef TILEGX
# define CPP_WORDSZ (__SIZEOF_POINTER__ * 8)
# define MACH_TYPE "TILE-Gx"
# define ALIGNMENT __SIZEOF_POINTER__
# if CPP_WORDSZ < 64
# define CLEAR_DOUBLE(x) (*(long long *)(x) = 0)
# endif
# define PREFETCH(x) __insn_prefetch_l1(x)
# define CACHE_LINE_SIZE 64
# ifdef LINUX
extern int __data_start[];
# define DATASTART ((ptr_t)__data_start)
# endif
# endif /* TILEGX */
# ifdef RISCV
# define MACH_TYPE "RISC-V"
# define CPP_WORDSZ __riscv_xlen /* 32 or 64 */
# define ALIGNMENT (CPP_WORDSZ/8)
# ifdef FREEBSD
/* Nothing specific. */
# endif
# ifdef LINUX
extern int __data_start[] __attribute__((__weak__));
# define DATASTART ((ptr_t)__data_start)
# endif
# ifdef OPENBSD
/* Nothing specific. */
# endif
# endif /* RISCV */
#if defined(__GLIBC__) && !defined(DONT_USE_LIBC_PRIVATES)
/* Use glibc's stack-end marker. */
# define USE_LIBC_PRIVATES
#endif
#ifdef NO_RETRY_GET_THREAD_CONTEXT
# undef RETRY_GET_THREAD_CONTEXT
#endif
#if defined(LINUX_STACKBOTTOM) && defined(NO_PROC_STAT) \
&& !defined(USE_LIBC_PRIVATES)
/* This combination will fail, since we have no way to get */
/* the stack bottom. Use HEURISTIC2 instead. */
# undef LINUX_STACKBOTTOM
# define HEURISTIC2
/* This may still fail on some architectures like IA64. */
/* We tried ... */
#endif
#if defined(USE_MMAP_ANON) && !defined(USE_MMAP)
# define USE_MMAP 1
#elif (defined(LINUX) || defined(OPENBSD)) && defined(USE_MMAP)
/* The kernel may do a somewhat better job merging mappings etc. */
/* with anonymous mappings. */
# define USE_MMAP_ANON
#endif
#if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC) \
&& !defined(USE_PROC_FOR_LIBRARIES)
/* Nptl allocates thread stacks with mmap, which is fine. But it */
/* keeps a cache of thread stacks. Thread stacks contain the */
/* thread control blocks. These in turn contain a pointer to */
/* (sizeof (void *) from the beginning of) the dtv for thread-local */
/* storage, which is calloc allocated. If we don't scan the cached */
/* thread stacks, we appear to lose the dtv. This tends to */
/* result in something that looks like a bogus dtv count, which */
/* tends to result in a memset call on a block that is way too */
/* large. Sometimes we're lucky and the process just dies ... */
/* There seems to be a similar issue with some other memory */
/* allocated by the dynamic loader. */
/* This should be avoidable by either: */
/* - Defining USE_PROC_FOR_LIBRARIES here. */
/* That performs very poorly, precisely because we end up */
/* scanning cached stacks. */
/* - Have calloc look at its callers. */
/* In spite of the fact that it is gross and disgusting. */
/* In fact neither seems to suffice, probably in part because */
/* even with USE_PROC_FOR_LIBRARIES, we don't scan parts of stack */
/* segments that appear to be out of bounds. Thus we actually */
/* do both, which seems to yield the best results. */
# define USE_PROC_FOR_LIBRARIES
#endif
#ifndef STACK_GROWS_UP
# define STACK_GROWS_DOWN
#endif
#ifndef CPP_WORDSZ
# define CPP_WORDSZ 32
#endif
#ifndef OS_TYPE
# define OS_TYPE ""
#endif
#ifndef DATAEND
# if !defined(CPPCHECK)
extern int end[];
# endif
# define DATAEND ((ptr_t)(end))
#endif
/* Workaround for Android NDK clang 3.5+ (as of NDK r10e) which does */
/* not provide correct _end symbol. Unfortunately, alternate __end__ */
/* symbol is provided only by NDK "bfd" linker. */
#if defined(HOST_ANDROID) && defined(__clang__) \
&& !defined(BROKEN_UUENDUU_SYM)
# undef DATAEND
# pragma weak __end__
extern int __end__[];
# define DATAEND (__end__ != 0 ? (ptr_t)__end__ : (ptr_t)_end)
#endif
#if (defined(SVR4) || defined(HOST_ANDROID) || defined(HOST_TIZEN)) \
&& !defined(GETPAGESIZE)
EXTERN_C_END
# include <unistd.h>
EXTERN_C_BEGIN
# define GETPAGESIZE() (unsigned)sysconf(_SC_PAGESIZE)
#endif
#ifndef GETPAGESIZE
# if defined(AIX) || defined(IRIX5) || defined(LINUX) || defined(SOLARIS) \
|| defined(NETBSD) || defined(FREEBSD) || defined(HPUX)
EXTERN_C_END
# include <unistd.h>
EXTERN_C_BEGIN
# endif
# define GETPAGESIZE() (unsigned)getpagesize()
#endif
#if defined(HOST_ANDROID) && !(__ANDROID_API__ >= 23) \
&& ((defined(MIPS) && (CPP_WORDSZ == 32)) \
|| defined(ARM32) || defined(I386) /* but not x32 */)
/* tkill() exists only on arm32/mips(32)/x86. */
/* NDK r11+ deprecates tkill() but keeps it for Mono clients. */
# define USE_TKILL_ON_ANDROID
#endif
#if defined(SOLARIS) || defined(DRSNX) || defined(UTS4)
/* OS has SVR4 generic features. */
/* Probably others also qualify. */
# define SVR4
#endif
#if defined(MPROTECT_VDB) && defined(__GLIBC__) \
&& (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 2))
# error glibc too old?
#endif
#if defined(SOLARIS) || defined(DRSNX)
/* OS has SOLARIS style semi-undocumented interface */
/* to dynamic loader. */
# define SOLARISDL
/* OS has SOLARIS style signal handlers. */
# define SUNOS5SIGS
#endif
#if defined(HPUX)
# define SUNOS5SIGS
#endif
#if defined(FREEBSD) && (defined(__DragonFly__) || __FreeBSD__ >= 4 \
|| __FreeBSD_kernel__ >= 4 || defined(__GLIBC__))
# define SUNOS5SIGS
#endif
#if !defined(GC_EXPLICIT_SIGNALS_UNBLOCK) && defined(SUNOS5SIGS) \
&& !defined(GC_NO_PTHREAD_SIGMASK)
# define GC_EXPLICIT_SIGNALS_UNBLOCK
#endif
#if !defined(NO_SIGNALS_UNBLOCK_IN_MAIN) && defined(GC_NO_PTHREAD_SIGMASK)
# define NO_SIGNALS_UNBLOCK_IN_MAIN
#endif
#if !defined(NO_MARKER_SPECIAL_SIGMASK) \
&& (defined(NACL) || defined(GC_WIN32_PTHREADS))
/* Either there is no pthread_sigmask(), or GC marker thread cannot */
/* steal and drop user signal calls. */
# define NO_MARKER_SPECIAL_SIGMASK
#endif
#ifdef GC_NETBSD_THREADS
# define SIGRTMIN 33
# define SIGRTMAX 63
/* It seems to be necessary to wait until threads have restarted. */
/* But it is unclear why that is the case. */
# define GC_NETBSD_THREADS_WORKAROUND
#endif
#ifdef GC_OPENBSD_THREADS
EXTERN_C_END
# include <sys/param.h>
EXTERN_C_BEGIN
/* Prior to 5.2 release, OpenBSD had user threads and required */
/* special handling. */
# if OpenBSD < 201211
# define GC_OPENBSD_UTHREADS 1
# endif
#endif /* GC_OPENBSD_THREADS */
#if defined(SVR4) || defined(LINUX) || defined(IRIX5) || defined(HPUX) \
|| defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \
|| defined(DGUX) || defined(BSD) || defined(HAIKU) || defined(HURD) \
|| defined(AIX) || defined(DARWIN) || defined(OSF1)
# define UNIX_LIKE /* Basic Unix-like system calls work. */
#endif
#if defined(CPPCHECK)
# undef CPP_WORDSZ
# define CPP_WORDSZ (__SIZEOF_POINTER__ * 8)
#elif CPP_WORDSZ != 32 && CPP_WORDSZ != 64
# error Bad word size
#endif
#if !defined(ALIGNMENT) && !defined(CPPCHECK)
# error Undefined ALIGNMENT
#endif
#ifdef PCR
# undef DYNAMIC_LOADING
# undef STACKBOTTOM
# undef HEURISTIC1
# undef HEURISTIC2
# undef PROC_VDB
# undef MPROTECT_VDB
# define PCR_VDB
#endif
#if !defined(STACKBOTTOM) && (defined(ECOS) || defined(NOSYS)) \
&& !defined(CPPCHECK)
# error Undefined STACKBOTTOM
#endif
#ifdef IGNORE_DYNAMIC_LOADING
# undef DYNAMIC_LOADING
#endif
#if defined(SMALL_CONFIG) && !defined(GC_DISABLE_INCREMENTAL)
/* Presumably not worth the space it takes. */
# define GC_DISABLE_INCREMENTAL
#endif
#if (defined(MSWIN32) || defined(MSWINCE)) && !defined(USE_WINALLOC)
/* USE_WINALLOC is only an option for Cygwin. */
# define USE_WINALLOC 1
#endif
#ifdef USE_WINALLOC
# undef USE_MMAP
#endif
#if defined(DARWIN) || defined(FREEBSD) || defined(HAIKU) \
|| defined(IRIX5) || defined(LINUX) || defined(NETBSD) \
|| defined(OPENBSD) || defined(SOLARIS) \
|| ((defined(CYGWIN32) || defined(USE_MMAP) || defined(USE_MUNMAP)) \
&& !defined(USE_WINALLOC))
/* Try both sbrk and mmap, in that order. */
# define MMAP_SUPPORTED
#endif
/* Xbox One (DURANGO) may not need to be this aggressive, but the */
/* default is likely too lax under heavy allocation pressure. */
/* The platform does not have a virtual paging system, so it does not */
/* have a large virtual address space that a standard x64 platform has. */
#if defined(USE_MUNMAP) && !defined(MUNMAP_THRESHOLD) \
&& (defined(SN_TARGET_PS3) \
|| defined(SN_TARGET_PSP2) || defined(MSWIN_XBOX1))
# define MUNMAP_THRESHOLD 2
#endif
#if defined(USE_MUNMAP) && defined(COUNT_UNMAPPED_REGIONS) \
&& !defined(GC_UNMAPPED_REGIONS_SOFT_LIMIT)
/* The default limit of vm.max_map_count on Linux is ~65530. */
/* There is approximately one mapped region to every unmapped region. */
/* Therefore if we aim to use up to half of vm.max_map_count for the */
/* GC (leaving half for the rest of the process) then the number of */
/* unmapped regions should be one quarter of vm.max_map_count. */
# if defined(__DragonFly__)
# define GC_UNMAPPED_REGIONS_SOFT_LIMIT (1000000 / 4)
# else
# define GC_UNMAPPED_REGIONS_SOFT_LIMIT 16384
# endif
#endif
#if defined(GC_DISABLE_INCREMENTAL) || defined(DEFAULT_VDB)
# undef GWW_VDB
# undef MPROTECT_VDB
# undef PCR_VDB
# undef PROC_VDB
# undef SOFT_VDB
#endif
#ifdef NO_GWW_VDB
# undef GWW_VDB
#endif
#ifdef NO_MPROTECT_VDB
# undef MPROTECT_VDB
#endif
#ifdef NO_SOFT_VDB
# undef SOFT_VDB
#endif
#if defined(SOFT_VDB) && defined(SOFT_VDB_LINUX_VER_STATIC_CHECK)
EXTERN_C_END
# include <linux/version.h> /* for LINUX_VERSION[_CODE] */
EXTERN_C_BEGIN
# if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0)
/* Not reliable in kernels prior to v3.18. */
# undef SOFT_VDB
# endif
#endif /* SOFT_VDB */
#ifdef GC_DISABLE_INCREMENTAL
# undef CHECKSUMS
#endif
#ifdef USE_GLOBAL_ALLOC
/* Cannot pass MEM_WRITE_WATCH to GlobalAlloc(). */
# undef GWW_VDB
#endif
#if defined(BASE_ATOMIC_OPS_EMULATED)
/* GC_write_fault_handler() cannot use lock-based atomic primitives */
/* as this could lead to a deadlock. */
# undef MPROTECT_VDB
#endif
#if defined(USE_PROC_FOR_LIBRARIES) && defined(GC_LINUX_THREADS)
/* Incremental GC based on mprotect is incompatible with /proc roots. */
# undef MPROTECT_VDB
#endif
#if defined(MPROTECT_VDB) && defined(GC_PREFER_MPROTECT_VDB)
/* Choose MPROTECT_VDB manually (if multiple strategies available). */
# undef PCR_VDB
# undef PROC_VDB
/* GWW_VDB, SOFT_VDB are handled in os_dep.c. */
#endif
#ifdef PROC_VDB
/* Mutually exclusive VDB implementations (for now). */
# undef MPROTECT_VDB
/* For a test purpose only. */
# undef SOFT_VDB
#endif
#if defined(MPROTECT_VDB) && !defined(MSWIN32) && !defined(MSWINCE)
# include <signal.h> /* for SA_SIGINFO, SIGBUS */
#endif
#if defined(SIGBUS) && !defined(HAVE_SIGBUS) && !defined(CPPCHECK)
# define HAVE_SIGBUS
#endif
#ifndef SA_SIGINFO
# define NO_SA_SIGACTION
#endif
#if (defined(NO_SA_SIGACTION) || defined(GC_NO_SIGSETJMP)) \
&& defined(MPROTECT_VDB) && !defined(DARWIN) \
&& !defined(MSWIN32) && !defined(MSWINCE)
# undef MPROTECT_VDB
#endif
#if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB) \
&& !defined(GWW_VDB) && !defined(SOFT_VDB) && !defined(DEFAULT_VDB) \
&& !defined(GC_DISABLE_INCREMENTAL)
# define DEFAULT_VDB
#endif
#if !defined(PROC_VDB) && !defined(SOFT_VDB) \
&& !defined(NO_VDB_FOR_STATIC_ROOTS)
/* Cannot determine whether a static root page is dirty? */
# define NO_VDB_FOR_STATIC_ROOTS
#endif
#if ((defined(UNIX_LIKE) && (defined(DARWIN) || defined(HAIKU) \
|| defined(HURD) || defined(OPENBSD) \
|| defined(ARM32) \
|| defined(AVR32) || defined(MIPS) \
|| defined(NIOS2) || defined(OR1K))) \
|| (defined(LINUX) && !defined(__gnu_linux__)) \
|| (defined(RTEMS) && defined(I386)) || defined(HOST_ANDROID)) \
&& !defined(NO_GETCONTEXT)
# define NO_GETCONTEXT 1
#endif
#ifndef PREFETCH
# if GC_GNUC_PREREQ(3, 0) && !defined(NO_PREFETCH)
# define PREFETCH(x) __builtin_prefetch((x), 0, 0)
# else
# define PREFETCH(x) (void)0
# endif
#endif
#ifndef GC_PREFETCH_FOR_WRITE
# if GC_GNUC_PREREQ(3, 0) && !defined(GC_NO_PREFETCH_FOR_WRITE)
# define GC_PREFETCH_FOR_WRITE(x) __builtin_prefetch((x), 1)
# else
# define GC_PREFETCH_FOR_WRITE(x) (void)0
# endif
#endif
#ifndef CACHE_LINE_SIZE
# define CACHE_LINE_SIZE 32 /* Wild guess */
#endif
#ifndef STATIC
# ifdef GC_ASSERTIONS
# define STATIC /* ignore to aid debugging (or profiling) */
# else
# define STATIC static
# endif
#endif
#if defined(LINUX) && (defined(USE_PROC_FOR_LIBRARIES) || defined(IA64) \
|| !defined(SMALL_CONFIG))
# define NEED_PROC_MAPS
#endif
#if defined(LINUX) || defined(HURD) || defined(__GLIBC__)
# define REGISTER_LIBRARIES_EARLY
/* We sometimes use dl_iterate_phdr, which may acquire an internal */
/* lock. This isn't safe after the world has stopped. So we must */
/* call GC_register_dynamic_libraries before stopping the world. */
/* For performance reasons, this may be beneficial on other */
/* platforms as well, though it should be avoided in win32. */
#endif /* LINUX */
#if defined(SEARCH_FOR_DATA_START)
extern ptr_t GC_data_start;
# define DATASTART GC_data_start
#endif
#ifndef HEAP_START
# define HEAP_START ((ptr_t)0)
#endif
#ifndef CLEAR_DOUBLE
# define CLEAR_DOUBLE(x) (((word*)(x))[0] = 0, ((word*)(x))[1] = 0)
#endif
#if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC) \
&& !defined(INCLUDE_LINUX_THREAD_DESCR)
/* Will not work, since libc and the dynamic loader use thread */
/* locals, sometimes as the only reference. */
# define INCLUDE_LINUX_THREAD_DESCR
#endif
#if !defined(CPPCHECK)
# if defined(GC_IRIX_THREADS) && !defined(IRIX5)
# error Inconsistent configuration
# endif
# if defined(GC_LINUX_THREADS) && !defined(LINUX) && !defined(NACL)
# error Inconsistent configuration
# endif
# if defined(GC_NETBSD_THREADS) && !defined(NETBSD)
# error Inconsistent configuration
# endif
# if defined(GC_FREEBSD_THREADS) && !defined(FREEBSD)
# error Inconsistent configuration
# endif
# if defined(GC_SOLARIS_THREADS) && !defined(SOLARIS)
# error Inconsistent configuration
# endif
# if defined(GC_HPUX_THREADS) && !defined(HPUX)
# error Inconsistent configuration
# endif
# if defined(GC_AIX_THREADS) && !defined(_AIX)
# error Inconsistent configuration
# endif
# if defined(GC_WIN32_THREADS) && !defined(CYGWIN32) && !defined(MSWIN32) \
&& !defined(MSWINCE) && !defined(MSWIN_XBOX1)
# error Inconsistent configuration
# endif
# if defined(GC_WIN32_PTHREADS) && defined(CYGWIN32)
# error Inconsistent configuration
# endif
#endif /* !CPPCHECK */
#if defined(PCR) || defined(GC_WIN32_THREADS) || defined(GC_PTHREADS) \
|| ((defined(NN_PLATFORM_CTR) || defined(NINTENDO_SWITCH) \
|| defined(SN_TARGET_PS3) \
|| defined(SN_TARGET_PSP2)) && defined(GC_THREADS))
# define THREADS
#endif
#if defined(PARALLEL_MARK) && !defined(THREADS) && !defined(CPPCHECK)
# error Invalid config: PARALLEL_MARK requires GC_THREADS
#endif
#if defined(GWW_VDB) && !defined(USE_WINALLOC) && !defined(CPPCHECK)
# error Invalid config: GWW_VDB requires USE_WINALLOC
#endif
#if (((defined(MSWIN32) || defined(MSWINCE)) && !defined(__GNUC__)) \
|| (defined(MSWIN32) && defined(I386)) /* for Win98 */ \
|| (defined(USE_PROC_FOR_LIBRARIES) && defined(THREADS))) \
&& !defined(NO_CRT) && !defined(NO_WRAP_MARK_SOME)
/* Under rare conditions, we may end up marking from nonexistent */
/* memory. Hence we need to be prepared to recover by running */
/* GC_mark_some with a suitable handler in place. */
/* TODO: Probably replace __GNUC__ above with ndef GC_PTHREADS. */
/* FIXME: Should we really need it for WinCE? If yes then */
/* WRAP_MARK_SOME should be also defined for CeGCC which requires */
/* CPU/OS-specific code in mark_ex_handler and GC_mark_some (for */
/* manual stack unwinding and exception handler installation). */
# define WRAP_MARK_SOME
#endif
#if defined(PARALLEL_MARK) && !defined(DEFAULT_STACK_MAYBE_SMALL) \
&& (defined(HPUX) || defined(GC_DGUX386_THREADS) \
|| defined(NO_GETCONTEXT) /* e.g. musl */)
/* TODO: Test default stack size in configure. */
# define DEFAULT_STACK_MAYBE_SMALL
#endif
#ifdef PARALLEL_MARK
/* The minimum stack size for a marker thread. */
# define MIN_STACK_SIZE (8 * HBLKSIZE * sizeof(word))
#endif
#if defined(HOST_ANDROID) && !defined(THREADS) \
&& !defined(USE_GET_STACKBASE_FOR_MAIN)
/* Always use pthread_attr_getstack on Android ("-lpthread" option is */
/* not needed to be specified manually) since GC_linux_main_stack_base */
/* causes app crash if invoked inside Dalvik VM. */
# define USE_GET_STACKBASE_FOR_MAIN
#endif
/* Outline pthread primitives to use in GC_get_[main_]stack_base. */
#if ((defined(FREEBSD) && defined(__GLIBC__)) /* kFreeBSD */ \
|| defined(LINUX) || defined(NETBSD) || defined(HOST_ANDROID)) \
&& !defined(NO_PTHREAD_GETATTR_NP)
# define HAVE_PTHREAD_GETATTR_NP 1
#elif defined(FREEBSD) && !defined(__GLIBC__) \
&& !defined(NO_PTHREAD_ATTR_GET_NP)
# define HAVE_PTHREAD_NP_H 1 /* requires include pthread_np.h */
# define HAVE_PTHREAD_ATTR_GET_NP 1
#endif
#if defined(UNIX_LIKE) && defined(THREADS) && !defined(NO_CANCEL_SAFE) \
&& !defined(HOST_ANDROID)
/* Make the code cancellation-safe. This basically means that we */
/* ensure that cancellation requests are ignored while we are in */
/* the collector. This applies only to Posix deferred cancellation; */
/* we don't handle Posix asynchronous cancellation. */
/* Note that this only works if pthread_setcancelstate is */
/* async-signal-safe, at least in the absence of asynchronous */
/* cancellation. This appears to be true for the glibc version, */
/* though it is not documented. Without that assumption, there */
/* seems to be no way to safely wait in a signal handler, which */
/* we need to do for thread suspension. */
/* Also note that little other code appears to be cancellation-safe. */
/* Hence it may make sense to turn this off for performance. */
# define CANCEL_SAFE
#endif
#ifdef CANCEL_SAFE
# define IF_CANCEL(x) x
#else
# define IF_CANCEL(x) /* empty */
#endif
#if !defined(CAN_HANDLE_FORK) && !defined(NO_HANDLE_FORK) \
&& !defined(HAVE_NO_FORK) \
&& ((defined(GC_PTHREADS) && !defined(NACL) \
&& !defined(GC_WIN32_PTHREADS) && !defined(USE_WINALLOC)) \
|| (defined(DARWIN) && defined(MPROTECT_VDB)) || defined(HANDLE_FORK))
/* Attempts (where supported and requested) to make GC_malloc work in */
/* a child process fork'ed from a multi-threaded parent. */
# define CAN_HANDLE_FORK
#endif
#if defined(CAN_HANDLE_FORK) && !defined(CAN_CALL_ATFORK) \
&& !defined(GC_NO_CAN_CALL_ATFORK) && !defined(HOST_TIZEN) \
&& !defined(HURD) && (!defined(HOST_ANDROID) || __ANDROID_API__ >= 21)
/* Have working pthread_atfork(). */
# define CAN_CALL_ATFORK
#endif
#if !defined(CAN_HANDLE_FORK) && !defined(HAVE_NO_FORK) \
&& !(defined(CYGWIN32) || defined(SOLARIS) || defined(UNIX_LIKE))
# define HAVE_NO_FORK
#endif
#if !defined(USE_MARK_BITS) && !defined(USE_MARK_BYTES) \
&& defined(PARALLEL_MARK)
/* Minimize compare-and-swap usage. */
# define USE_MARK_BYTES
#endif
#if (defined(MSWINCE) && !defined(__CEGCC__) || defined(MSWINRT_FLAVOR)) \
&& !defined(NO_GETENV)
# define NO_GETENV
#endif
#if (defined(NO_GETENV) || defined(MSWINCE)) && !defined(NO_GETENV_WIN32)
# define NO_GETENV_WIN32
#endif
#if !defined(MSGBOX_ON_ERROR) && !defined(NO_MSGBOX_ON_ERROR) \
&& !defined(SMALL_CONFIG) && defined(MSWIN32) \
&& !defined(MSWINRT_FLAVOR) && !defined(MSWIN_XBOX1)
/* Show Windows message box with "OK" button on a GC fatal error. */
/* Client application is terminated once the user clicks the button. */
# define MSGBOX_ON_ERROR
#endif
#ifndef STRTOULL
# if defined(_WIN64) && !defined(__GNUC__)
# define STRTOULL _strtoui64
# elif defined(_LLP64) || defined(__LLP64__) || defined(_WIN64)
# define STRTOULL strtoull
# else
/* strtoul() fits since sizeof(long) >= sizeof(word). */
# define STRTOULL strtoul
# endif
#endif /* !STRTOULL */
#ifndef GC_WORD_C
# if defined(_WIN64) && !defined(__GNUC__)
# define GC_WORD_C(val) val##ui64
# elif defined(_LLP64) || defined(__LLP64__) || defined(_WIN64)
# define GC_WORD_C(val) val##ULL
# else
# define GC_WORD_C(val) ((word)val##UL)
# endif
#endif /* !GC_WORD_C */
#if defined(__has_feature)
/* __has_feature() is supported. */
# if __has_feature(address_sanitizer) && !defined(ADDRESS_SANITIZER)
# define ADDRESS_SANITIZER
# endif
# if __has_feature(memory_sanitizer) && !defined(MEMORY_SANITIZER)
# define MEMORY_SANITIZER
# endif
# if __has_feature(thread_sanitizer) && !defined(THREAD_SANITIZER)
# define THREAD_SANITIZER
# endif
#else
# ifdef __SANITIZE_ADDRESS__
/* GCC v4.8+ */
# define ADDRESS_SANITIZER
# endif
#endif /* !__has_feature */
#if defined(SPARC)
# define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */
/* include assembly code to do it well. */
#endif
/* Can we save call chain in objects for debugging? */
/* SET NFRAMES (# of saved frames) and NARGS (#of args for each */
/* frame) to reasonable values for the platform. */
/* Set SAVE_CALL_CHAIN if we can. SAVE_CALL_COUNT can be specified */
/* at build time, though we feel free to adjust it slightly. */
/* Define NEED_CALLINFO if we either save the call stack or */
/* GC_ADD_CALLER is defined. */
/* GC_CAN_SAVE_CALL_STACKS is set in gc.h. */
#if defined(SPARC)
# define CAN_SAVE_CALL_ARGS
#endif
#if (defined(I386) || defined(X86_64)) \
&& (defined(LINUX) || defined(__GLIBC__))
/* SAVE_CALL_CHAIN is supported if the code is compiled to save */
/* frame pointers by default, i.e. no -fomit-frame-pointer flag. */
# define CAN_SAVE_CALL_ARGS
#endif
#if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \
&& defined(GC_CAN_SAVE_CALL_STACKS)
# define SAVE_CALL_CHAIN
#endif
#ifdef SAVE_CALL_CHAIN
# if defined(SAVE_CALL_NARGS) && defined(CAN_SAVE_CALL_ARGS)
# define NARGS SAVE_CALL_NARGS
# else
# define NARGS 0 /* Number of arguments to save for each call. */
# endif
#endif
#ifdef SAVE_CALL_CHAIN
# if !defined(SAVE_CALL_COUNT) || defined(CPPCHECK)
# define NFRAMES 6 /* Number of frames to save. Even for */
/* alignment reasons. */
# else
# define NFRAMES ((SAVE_CALL_COUNT + 1) & ~1)
# endif
# define NEED_CALLINFO
#endif /* SAVE_CALL_CHAIN */
#ifdef GC_ADD_CALLER
# define NFRAMES 1
# define NARGS 0
# define NEED_CALLINFO
#endif
#if (defined(FREEBSD) || (defined(DARWIN) && !defined(_POSIX_C_SOURCE)) \
|| (defined(SOLARIS) && (!defined(_XOPEN_SOURCE) \
|| defined(__EXTENSIONS__))) \
|| defined(LINUX)) && !defined(HAVE_DLADDR)
# define HAVE_DLADDR 1
#endif
#if defined(MAKE_BACK_GRAPH) && !defined(DBG_HDRS_ALL)
# define DBG_HDRS_ALL 1
#endif
#if defined(POINTER_MASK) && !defined(POINTER_SHIFT)
# define POINTER_SHIFT 0
#endif
#if defined(POINTER_SHIFT) && !defined(POINTER_MASK)
# define POINTER_MASK ((word)(-1))
#endif
#if !defined(FIXUP_POINTER) && defined(POINTER_MASK)
# define FIXUP_POINTER(p) (p = ((p) & POINTER_MASK) << POINTER_SHIFT)
#endif
#if defined(FIXUP_POINTER)
# define NEED_FIXUP_POINTER
#else
# define FIXUP_POINTER(p)
#endif
#if !defined(MARK_BIT_PER_GRANULE) && !defined(MARK_BIT_PER_OBJ)
# define MARK_BIT_PER_GRANULE /* Usually faster */
#endif
/* Some static sanity tests. */
#if !defined(CPPCHECK)
# if defined(MARK_BIT_PER_GRANULE) && defined(MARK_BIT_PER_OBJ)
# error Define only one of MARK_BIT_PER_GRANULE and MARK_BIT_PER_OBJ
# endif
# if defined(STACK_GROWS_UP) && defined(STACK_GROWS_DOWN)
# error Only one of STACK_GROWS_UP and STACK_GROWS_DOWN should be defined
# endif
# if !defined(STACK_GROWS_UP) && !defined(STACK_GROWS_DOWN)
# error One of STACK_GROWS_UP and STACK_GROWS_DOWN should be defined
# endif
# if defined(REDIRECT_MALLOC) && defined(THREADS) && !defined(LINUX) \
&& !defined(REDIRECT_MALLOC_IN_HEADER)
# error REDIRECT_MALLOC with THREADS works at most on Linux
# endif
#endif /* !CPPCHECK */
#ifdef GC_PRIVATE_H
/* This relies on some type definitions from gc_priv.h, from */
/* where it's normally included. */
/* */
/* How to get heap memory from the OS: */
/* Note that sbrk()-like allocation is preferred, since it */
/* usually makes it possible to merge consecutively allocated */
/* chunks. It also avoids unintended recursion with */
/* REDIRECT_MALLOC macro defined. */
/* GET_MEM() argument should be of size_t type and have */
/* no side-effect. GET_MEM() returns HBLKSIZE-aligned chunk; */
/* 0 is taken to mean failure. */
/* In case of MMAP_SUPPORTED, the argument must also be */
/* a multiple of a physical page size. */
/* GET_MEM is currently not assumed to retrieve 0 filled space, */
/* though we should perhaps take advantage of the case in which */
/* does. */
struct hblk; /* See gc_priv.h. */
# if defined(PCR)
char * real_malloc(size_t bytes);
# define GET_MEM(bytes) HBLKPTR(real_malloc(SIZET_SAT_ADD(bytes, \
GC_page_size)) \
+ GC_page_size-1)
# elif defined(OS2)
void * os2_alloc(size_t bytes);
# define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc( \
SIZET_SAT_ADD(bytes, \
GC_page_size)) \
+ GC_page_size-1)
# elif defined(NEXT) || defined(DOS4GW) || defined(NONSTOP) \
|| (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) \
|| (defined(SOLARIS) && !defined(USE_MMAP)) || defined(RTEMS) \
|| defined(__CC_ARM)
# define GET_MEM(bytes) HBLKPTR((size_t)calloc(1, \
SIZET_SAT_ADD(bytes, \
GC_page_size)) \
+ GC_page_size - 1)
# elif defined(MSWIN_XBOX1)
ptr_t GC_durango_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk *)GC_durango_get_mem(bytes)
# elif defined(MSWIN32) || defined(CYGWIN32)
ptr_t GC_win32_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes)
# elif defined(MACOS)
# if defined(USE_TEMPORARY_MEMORY)
Ptr GC_MacTemporaryNewPtr(size_t size, Boolean clearMemory);
# define GET_MEM(bytes) HBLKPTR(GC_MacTemporaryNewPtr( \
SIZET_SAT_ADD(bytes, \
GC_page_size), true) \
+ GC_page_size-1)
# else
# define GET_MEM(bytes) HBLKPTR(NewPtrClear(SIZET_SAT_ADD(bytes, \
GC_page_size)) \
+ GC_page_size-1)
# endif
# elif defined(MSWINCE)
ptr_t GC_wince_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes)
# elif defined(AMIGA) && defined(GC_AMIGA_FASTALLOC)
void *GC_amiga_get_mem(size_t bytes);
# define GET_MEM(bytes) HBLKPTR((size_t)GC_amiga_get_mem( \
SIZET_SAT_ADD(bytes, \
GC_page_size)) \
+ GC_page_size-1)
# elif defined(PLATFORM_GETMEM)
void *platform_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk*)platform_get_mem(bytes)
# elif defined(SN_TARGET_PS3)
void *ps3_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk*)ps3_get_mem(bytes)
# elif defined(SN_TARGET_PSP2)
void *psp2_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk*)psp2_get_mem(bytes)
# elif defined(NINTENDO_SWITCH)
void *switch_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk*)switch_get_mem(bytes)
# elif defined(HAIKU)
ptr_t GC_haiku_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk*)GC_haiku_get_mem(bytes)
# elif defined(EMSCRIPTEN_TINY)
void *emmalloc_memalign(size_t alignment, size_t size);
# define GET_MEM(bytes) (struct hblk*)emmalloc_memalign(GC_page_size, bytes)
# else
ptr_t GC_unix_get_mem(size_t bytes);
# define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes)
# endif
#endif /* GC_PRIVATE_H */
EXTERN_C_END
#endif /* GCCONFIG_H */
|
