aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/beam/global.h
blob: 7724231cd5932bb516a38fd11e5821992edfceaa (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 1996-2018. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * %CopyrightEnd%
 */

#ifndef __GLOBAL_H__
#define __GLOBAL_H__

#include "sys.h"
#include <stddef.h> /* offsetof() */
#include "erl_alloc.h"
#include "erl_vm.h"
#include "erl_node_container_utils.h"
#include "hash.h"
#include "index.h"
#include "atom.h"
#include "code_ix.h"
#include "export.h"
#include "module.h"
#include "register.h"
#include "erl_fun.h"
#include "erl_node_tables.h"
#include "erl_process.h"
#include "erl_sys_driver.h"
#include "erl_debug.h"
#include "error.h"
#include "erl_utils.h"
#include "erl_port.h"
#include "erl_gc.h"
#include "erl_nif.h"
#define ERTS_BINARY_TYPES_ONLY__
#include "erl_binary.h"
#undef ERTS_BINARY_TYPES_ONLY__

struct enif_func_t;

#ifdef  DEBUG
#  define ERTS_NIF_ASSERT_IN_ENV
#endif
struct enif_environment_t /* ErlNifEnv */
{
    struct erl_module_nif* mod_nif;
    Process* proc;
    Eterm* hp;
    Eterm* hp_end;
    ErlHeapFragment* heap_frag;
    int fpe_was_unmasked;
    struct enif_tmp_obj_t* tmp_obj_list;
    int exception_thrown; /* boolean */
    Process *tracee;
    int exiting; /* boolean (dirty nifs might return in exiting state) */

#ifdef ERTS_NIF_ASSERT_IN_ENV
    int dbg_disable_assert_in_env;
#endif
};
struct enif_resource_type_t
{
    struct enif_resource_type_t* next;   /* list of all resource types */
    struct enif_resource_type_t* prev;
    struct erl_module_nif* owner;  /* that created this type and thus implements the destructor*/
    ErlNifResourceDtor* dtor;      /* user destructor function */
    ErlNifResourceStop* stop;
    ErlNifResourceDown* down;
    erts_refc_t refc;  /* num of resources of this type (HOTSPOT warning)
                          +1 for active erl_module_nif */
    Eterm module;
    Eterm name;
};

typedef struct
{
    erts_mtx_t lock;
    ErtsMonitor* root;
    Uint refc;
    size_t user_data_sz;
} ErtsResourceMonitors;

typedef struct ErtsResource_
{
    struct enif_resource_type_t* type;
    ErtsResourceMonitors* monitors;
#ifdef DEBUG
    erts_refc_t nif_refc;
#else
# ifdef ARCH_32
    byte align__[4];
# endif
#endif
    char data[1];
}ErtsResource;

#define DATA_TO_RESOURCE(PTR) ErtsContainerStruct(PTR, ErtsResource, data)
#define erts_resource_ref_size(P) ERTS_MAGIC_REF_THING_SIZE

extern Eterm erts_bld_resource_ref(Eterm** hp, ErlOffHeap*, ErtsResource*);

extern void erts_pre_nif(struct enif_environment_t*, Process*,
			 struct erl_module_nif*, Process* tracee);
extern void erts_post_nif(struct enif_environment_t* env);
extern void erts_resource_stop(ErtsResource*, ErlNifEvent, int is_direct_call);
void erts_fire_nif_monitor(ErtsMonitor *tmon);
void erts_nif_demonitored(ErtsResource* resource);
extern void erts_add_taint(Eterm mod_atom);
extern Eterm erts_nif_taints(Process* p);
extern void erts_print_nif_taints(fmtfn_t to, void* to_arg);
void erts_unload_nif(struct erl_module_nif* nif);
extern void erl_nif_init(void);
extern int erts_nif_get_funcs(struct erl_module_nif*,
                              struct enif_func_t **funcs);
extern Eterm erts_nif_call_function(Process *p, Process *tracee,
                                    struct erl_module_nif*,
                                    struct enif_func_t *,
                                    int argc, Eterm *argv);

int erts_call_dirty_nif(ErtsSchedulerData *esdp, Process *c_p,
			BeamInstr *I, Eterm *reg);


/* Driver handle (wrapper for old plain handle) */
#define ERL_DE_OK      0
#define ERL_DE_UNLOAD  1
#define ERL_DE_FORCE_UNLOAD 2 
#define ERL_DE_RELOAD  3
#define ERL_DE_FORCE_RELOAD  4
#define ERL_DE_PERMANENT 5

#define ERL_DE_PROC_LOADED 0
#define ERL_DE_PROC_AWAIT_UNLOAD 1
#define ERL_DE_PROC_AWAIT_UNLOAD_ONLY 2
#define ERL_DE_PROC_AWAIT_LOAD 3

/* Flags for process entries */
#define ERL_DE_FL_DEREFERENCED 1

/* Flags for drivers, put locking policy here /PaN */
#define ERL_DE_FL_KILL_PORTS 1

#define ERL_FL_CONSISTENT_MASK ( ERL_DE_FL_KILL_PORTS )

/* System specific load errors are returned as positive values */
#define ERL_DE_NO_ERROR 0
#define ERL_DE_LOAD_ERROR_NO_INIT -1
#define ERL_DE_LOAD_ERROR_FAILED_INIT -2
#define ERL_DE_LOAD_ERROR_BAD_NAME -3
#define ERL_DE_LOAD_ERROR_NAME_TO_LONG -4
#define ERL_DE_LOAD_ERROR_INCORRECT_VERSION -5
#define ERL_DE_ERROR_NO_DDLL_FUNCTIONALITY -6
#define ERL_DE_ERROR_UNSPECIFIED -7
#define ERL_DE_LOOKUP_ERROR_NOT_FOUND -8
#define ERL_DE_DYNAMIC_ERROR_OFFSET -10

typedef struct de_proc_entry {
    Process *proc;                   /* The process... */
    Uint    awaiting_status;         /* PROC_LOADED == Have loaded the driver
			                PROC_AWAIT_UNLOAD == Wants to be notified 
			                when we have unloaded the driver (was locked)
			                PROC_AWAIT_LOAD == Wants to be notified when we
			                reloaded the driver (old was locked) */
    Uint    flags;                   /* ERL_FL_DE_DEREFERENCED when reload in progress */
    Eterm   heap[ERTS_REF_THING_SIZE];    /* "ref heap" */
    struct  de_proc_entry *next;
} DE_ProcEntry;

typedef struct {
    void         *handle;             /* Handle for DLL or SO (for dyn. drivers). */
    DE_ProcEntry *procs;              /* List of pids that have loaded this driver,
				         or that wait for it to change state */
    erts_refc_t  refc;                /* Number of ports/processes having
					 references to the driver */
    erts_atomic32_t port_count;   /* Number of ports using the driver */
    Uint         flags;               /* ERL_DE_FL_KILL_PORTS */
    int          status;              /* ERL_DE_xxx */
    char         *full_path;          /* Full path of the driver */
    char         *reload_full_path;   /* If status == ERL_DE_RELOAD, this contains
				         full name of driver (path) */
    char         *reload_driver_name; /* ... and this contains the driver name */
    Uint         reload_flags;        /* flags for reloaded driver */
} DE_Handle;

/*
 * This structure represents a link to the next driver.
 */

struct erts_driver_t_ {
    erts_driver_t *next;
    erts_driver_t *prev;
    char *name;
    struct {
	int major;
	int minor;
    } version;
    int flags;
    DE_Handle *handle;
    erts_mtx_t *lock;
    ErlDrvEntry *entry;
    ErlDrvData (*start)(ErlDrvPort port, char *command, SysDriverOpts* opts);
    void (*stop)(ErlDrvData drv_data);
    void (*finish)(void);
    void (*flush)(ErlDrvData drv_data);
    void (*output)(ErlDrvData drv_data, char *buf, ErlDrvSizeT len);
    void (*outputv)(ErlDrvData drv_data, ErlIOVec *ev); /* Might be NULL */
    ErlDrvSSizeT (*control)(ErlDrvData drv_data, unsigned int command,
			    char *buf, ErlDrvSizeT len,
			    char **rbuf, ErlDrvSizeT rlen); /* Might be NULL */
    ErlDrvSSizeT (*call)(ErlDrvData drv_data, unsigned int command,
			 char *buf, ErlDrvSizeT len,
			 char **rbuf, ErlDrvSizeT rlen, /* Might be NULL */
			 unsigned int *flags);
    void (*ready_input)(ErlDrvData drv_data, ErlDrvEvent event); 
    void (*ready_output)(ErlDrvData drv_data, ErlDrvEvent event);  
    void (*timeout)(ErlDrvData drv_data);
    void (*ready_async)(ErlDrvData drv_data, ErlDrvThreadData thread_data); /* Might be NULL */ 
    void (*process_exit)(ErlDrvData drv_data, ErlDrvMonitor *monitor);
    void (*stop_select)(ErlDrvEvent event, void*); /* Might be NULL */
    void (*emergency_close)(ErlDrvData drv_data);  /* Might be NULL */
};

extern erts_driver_t *driver_list;
extern erts_rwmtx_t erts_driver_list_lock;

extern void erts_ddll_init(void);
extern void erts_ddll_lock_driver(DE_Handle *dh, char *name);

/* These are for bookkeeping */
extern void erts_ddll_increment_port_count(DE_Handle *dh);
extern void erts_ddll_decrement_port_count(DE_Handle *dh);

/* These makes things happen, drivers may be scheduled for unload etc */
extern void erts_ddll_reference_driver(DE_Handle *dh);
extern void erts_ddll_reference_referenced_driver(DE_Handle *dh);
extern void erts_ddll_dereference_driver(DE_Handle *dh);

extern char *erts_ddll_error(int code);
extern void erts_ddll_proc_dead(Process *p, ErtsProcLocks plocks);
extern int erts_ddll_driver_ok(DE_Handle *dh);
extern void erts_ddll_remove_monitor(Process *p,
				     Eterm ref,
				     ErtsProcLocks plocks);
extern Eterm erts_ddll_monitor_driver(Process *p,
				      Eterm description,
				      ErtsProcLocks plocks);

/*
 * This structure represents one type of a binary in a process.
 */

typedef struct proc_bin {
    Eterm thing_word;		/* Subtag REFC_BINARY_SUBTAG. */
    Uint size;			/* Binary size in bytes. */
    struct erl_off_heap_header *next;
    Binary *val;		/* Pointer to Binary structure. */
    byte *bytes;		/* Pointer to the actual data bytes. */
    Uint flags;			/* Flag word. */
} ProcBin;

#define PB_IS_WRITABLE 1	/* Writable (only one reference to ProcBin) */
#define PB_ACTIVE_WRITER 2	/* There is an active writer */

/*
 * ProcBin size in Eterm words.
 */
#define PROC_BIN_SIZE (sizeof(ProcBin)/sizeof(Eterm))

union erl_off_heap_ptr {
    struct erl_off_heap_header* hdr;
    ProcBin *pb;
    struct erl_fun_thing* fun;
    struct external_thing_* ext;
    ErtsMRefThing *mref;
    Eterm* ep;
    void* voidp;
};

/* controls warning mapping in error_logger */

extern Eterm node_cookie;
extern Uint display_items;	/* no of items to display in traces etc */

extern int erts_backtrace_depth;
extern erts_atomic32_t erts_max_gen_gcs;

extern int bif_reductions;      /* reductions + fcalls (when doing call_bif) */
extern int stackdump_on_exit;

/*
 * Here is an implementation of a lightweight stack.
 *
 * Use it like this:
 *
 * DECLARE_ESTACK(Stack)	(At the start of a block)
 * ...
 * ESTACK_PUSH(Stack, Term)
 * ...
 * if (ESTACK_ISEMPTY(Stack)) {
 *    Stack is empty
 * } else {
 *    Term = ESTACK_POP(Stack);
 *    Process popped Term here
 * }
 * ...
 * DESTROY_ESTACK(Stack)
 */

typedef struct ErtsEStack_ {
    Eterm* start;
    Eterm* sp;
    Eterm* end;
    Eterm* edefault;
    ErtsAlcType_t alloc_type;
}ErtsEStack;

#define DEF_ESTACK_SIZE (16)

void erl_grow_estack(ErtsEStack*, Uint need);
#define ESTK_CONCAT(a,b) a##b
#define ESTK_DEF_STACK(s) ESTK_CONCAT(s,_default_estack)

#define DECLARE_ESTACK(s)				\
    Eterm ESTK_DEF_STACK(s)[DEF_ESTACK_SIZE];		\
    ErtsEStack s = {					\
        ESTK_DEF_STACK(s),  /* start */ 		\
        ESTK_DEF_STACK(s),  /* sp */			\
        ESTK_DEF_STACK(s) + DEF_ESTACK_SIZE, /* end */	\
        ESTK_DEF_STACK(s),  /* default */		\
        ERTS_ALC_T_ESTACK /* alloc_type */		\
    }

#define ESTACK_CHANGE_ALLOCATOR(s,t)					\
do {									\
    if ((s).start != ESTK_DEF_STACK(s)) {				\
	erts_exit(ERTS_ERROR_EXIT, "Internal error - trying to change allocator "	\
		 "type of active estack\n");				\
    }									\
    (s).alloc_type = (t);						\
 } while (0)

#define DESTROY_ESTACK(s)				\
do {							\
    if ((s).start != ESTK_DEF_STACK(s)) {		\
	erts_free((s).alloc_type, (s).start); 		\
    }							\
} while(0)


/*
 * Do not free the stack after this, it may have pointers into what
 * was saved in 'dst'.
 */
#define ESTACK_SAVE(s,dst)\
do {\
    if ((s).start == ESTK_DEF_STACK(s)) {\
	UWord _wsz = ESTACK_COUNT(s);\
	(dst)->start = erts_alloc((s).alloc_type,\
				  DEF_ESTACK_SIZE * sizeof(Eterm));\
	sys_memcpy((dst)->start, (s).start,_wsz*sizeof(Eterm));\
	(dst)->sp = (dst)->start + _wsz;\
	(dst)->end = (dst)->start + DEF_ESTACK_SIZE;\
        (dst)->edefault = NULL;\
	(dst)->alloc_type = (s).alloc_type;\
    } else\
        *(dst) = (s);\
 } while (0)

#define DESTROY_SAVED_ESTACK(estack)\
do {\
    if ((estack)->start) {\
	erts_free((estack)->alloc_type, (estack)->start);\
	(estack)->start = NULL;\
    }\
} while(0)

#define CLEAR_SAVED_ESTACK(estack) ((void) ((estack)->start = NULL))

/*
 * Use on empty stack, only the allocator can be changed before this.
 * The src stack is reset to NULL.
 */
#define ESTACK_RESTORE(s, src)			\
do {						\
    ASSERT((s).start == ESTK_DEF_STACK(s));	\
    (s) = *(src);  /* struct copy */		\
    (src)->start = NULL;			\
    ASSERT((s).sp >= (s).start);		\
    ASSERT((s).sp <= (s).end);			\
} while (0)

#define ESTACK_IS_STATIC(s) ((s).start == ESTK_DEF_STACK(s))

#define ESTACK_PUSH(s, x)			\
do {						\
    if ((s).sp == (s).end) {			\
	erl_grow_estack(&(s), 1); 		\
    }						\
    *(s).sp++ = (x);				\
} while(0)

#define ESTACK_PUSH2(s, x, y)			\
do {						\
    if ((s).sp > (s).end - 2) {			\
	erl_grow_estack(&(s), 2);		\
    }						\
    *(s).sp++ = (x);				\
    *(s).sp++ = (y);				\
} while(0)

#define ESTACK_PUSH3(s, x, y, z)		\
do {						\
    if ((s).sp > (s).end - 3) {			\
	erl_grow_estack(&s, 3); 		\
    }						\
    *(s).sp++ = (x);				\
    *(s).sp++ = (y);				\
    *(s).sp++ = (z);				\
} while(0)

#define ESTACK_PUSH4(s, E1, E2, E3, E4)		\
do {						\
    if ((s).sp > (s).end - 4) {			\
	erl_grow_estack(&s, 4);                 \
    }						\
    *(s).sp++ = (E1);				\
    *(s).sp++ = (E2);				\
    *(s).sp++ = (E3);				\
    *(s).sp++ = (E4);				\
} while(0)

#define ESTACK_RESERVE(s, push_cnt)             \
do {					        \
    if ((s).sp > (s).end - (push_cnt)) {	\
	erl_grow_estack(&(s), (push_cnt));	\
    }					        \
} while(0)

/* Must be preceded by ESTACK_RESERVE */
#define ESTACK_FAST_PUSH(s, x)				\
do {							\
    ASSERT((s).sp < (s).end);                           \
    *s.sp++ = (x);					\
} while(0)

#define ESTACK_COUNT(s) ((s).sp - (s).start)
#define ESTACK_ISEMPTY(s) ((s).sp == (s).start)
#define ESTACK_POP(s) (*(--(s).sp))


/*
 * WSTACK: same as ESTACK but with UWord instead of Eterm
 */

typedef struct ErtsWStack_ {
    UWord* wstart;
    UWord* wsp;
    UWord* wend;
    UWord* wdefault;
    ErtsAlcType_t alloc_type;
}ErtsWStack;

#define DEF_WSTACK_SIZE (16)

void erl_grow_wstack(ErtsWStack*, Uint need);
#define WSTK_CONCAT(a,b) a##b
#define WSTK_DEF_STACK(s) WSTK_CONCAT(s,_default_wstack)

#define WSTACK_DECLARE(s)				\
    UWord WSTK_DEF_STACK(s)[DEF_WSTACK_SIZE];		\
    ErtsWStack s = {					\
        WSTK_DEF_STACK(s),  /* wstart */ 		\
        WSTK_DEF_STACK(s),  /* wsp */			\
        WSTK_DEF_STACK(s) + DEF_WSTACK_SIZE, /* wend */	\
        WSTK_DEF_STACK(s),  /* wdflt */ 		\
        ERTS_ALC_T_ESTACK /* alloc_type */		\
    }
#define DECLARE_WSTACK WSTACK_DECLARE

typedef struct ErtsDynamicWStack_ {
    UWord default_stack[DEF_WSTACK_SIZE];
    ErtsWStack ws;
}ErtsDynamicWStack;

#define WSTACK_INIT(dwsp, ALC_TYPE)                               \
do {	 	                                                  \
    (dwsp)->ws.wstart   = (dwsp)->default_stack;                  \
    (dwsp)->ws.wsp      = (dwsp)->default_stack;                  \
    (dwsp)->ws.wend     = (dwsp)->default_stack + DEF_WSTACK_SIZE;\
    (dwsp)->ws.wdefault = (dwsp)->default_stack;                  \
    (dwsp)->ws.alloc_type = ALC_TYPE;                             \
} while (0)

#define WSTACK_CHANGE_ALLOCATOR(s,t)					\
do {									\
    if (s.wstart != WSTK_DEF_STACK(s)) {				\
	erts_exit(ERTS_ERROR_EXIT, "Internal error - trying to change allocator "	\
		 "type of active wstack\n");				\
    }									\
    s.alloc_type = (t);							\
 } while (0)

#define WSTACK_DESTROY(s)				\
do {							\
    if (s.wstart != s.wdefault) {		        \
	erts_free(s.alloc_type, s.wstart); 		\
    }							\
} while(0)
#define DESTROY_WSTACK WSTACK_DESTROY

#define WSTACK_DEBUG(s) \
    do { \
	fprintf(stderr, "wstack size   = %ld\r\n", s.wsp - s.wstart); \
	fprintf(stderr, "wstack wstart = %p\r\n", s.wstart); \
	fprintf(stderr, "wstack wsp    = %p\r\n", s.wsp); \
    } while(0)

/*
 * Do not free the stack after this, it may have pointers into what
 * was saved in 'dst'.
 */
#define WSTACK_SAVE(s,dst)\
do {\
    if (s.wstart == WSTK_DEF_STACK(s)) {\
	UWord _wsz = WSTACK_COUNT(s);\
	(dst)->wstart = erts_alloc(s.alloc_type,\
				  DEF_WSTACK_SIZE * sizeof(UWord));\
	sys_memcpy((dst)->wstart, s.wstart,_wsz*sizeof(UWord));\
	(dst)->wsp = (dst)->wstart + _wsz;\
	(dst)->wend = (dst)->wstart + DEF_WSTACK_SIZE;\
        (dst)->wdefault = NULL;\
	(dst)->alloc_type = s.alloc_type;\
    } else\
        *(dst) = s;\
 } while (0)

#define DESTROY_SAVED_WSTACK(wstack)\
do {\
    if ((wstack)->wstart) {\
	erts_free((wstack)->alloc_type, (wstack)->wstart);\
	(wstack)->wstart = NULL;\
    }\
} while(0)

#define CLEAR_SAVED_WSTACK(wstack) ((void) ((wstack)->wstart = NULL))

/*
 * Use on empty stack, only the allocator can be changed before this.
 * The src stack is reset to NULL.
 */
#define WSTACK_RESTORE(s, src)			\
do {						\
    ASSERT(s.wstart == WSTK_DEF_STACK(s));	\
    s = *(src);  /* struct copy */		\
    (src)->wstart = NULL;			\
    ASSERT(s.wsp >= s.wstart);			\
    ASSERT(s.wsp <= s.wend);			\
} while (0)

#define WSTACK_IS_STATIC(s) (s.wstart == WSTK_DEF_STACK(s))

#define WSTACK_PUSH(s, x)				\
do {							\
    if (s.wsp == s.wend) {				\
	erl_grow_wstack(&s, 1); 	                \
    }							\
    *s.wsp++ = (x);					\
} while(0)

#define WSTACK_PUSH2(s, x, y)			\
do {						\
    if (s.wsp > s.wend - 2) {			\
	erl_grow_wstack(&s, 2);                 \
    }						\
    *s.wsp++ = (x);				\
    *s.wsp++ = (y);				\
} while(0)

#define WSTACK_PUSH3(s, x, y, z)		\
do {						\
    if (s.wsp > s.wend - 3) {	                \
	erl_grow_wstack(&s, 3);                 \
    }						\
    *s.wsp++ = (x);				\
    *s.wsp++ = (y);				\
    *s.wsp++ = (z);				\
} while(0)

#define WSTACK_PUSH4(s, A1, A2, A3, A4)		\
do {						\
    if (s.wsp > s.wend - 4) {	                \
	erl_grow_wstack(&s, 4);                 \
    }						\
    *s.wsp++ = (A1);				\
    *s.wsp++ = (A2);				\
    *s.wsp++ = (A3);				\
    *s.wsp++ = (A4);				\
} while(0)

#define WSTACK_PUSH5(s, A1, A2, A3, A4, A5)     \
do {						\
    if (s.wsp > s.wend - 5) {	                \
	erl_grow_wstack(&s, 5);                 \
    }						\
    *s.wsp++ = (A1);				\
    *s.wsp++ = (A2);				\
    *s.wsp++ = (A3);				\
    *s.wsp++ = (A4);				\
    *s.wsp++ = (A5);				\
} while(0)

#define WSTACK_PUSH6(s, A1, A2, A3, A4, A5, A6) \
do {						\
    if (s.wsp > s.wend - 6) {	                \
	erl_grow_wstack(&s, 6);                 \
    }						\
    *s.wsp++ = (A1);				\
    *s.wsp++ = (A2);				\
    *s.wsp++ = (A3);				\
    *s.wsp++ = (A4);				\
    *s.wsp++ = (A5);				\
    *s.wsp++ = (A6);				\
} while(0)

#define WSTACK_RESERVE(s, push_cnt)             \
do {						\
    if (s.wsp > s.wend - (push_cnt)) { 	        \
	erl_grow_wstack(&s, (push_cnt));        \
    }                                           \
} while(0)

/* Must be preceded by WSTACK_RESERVE */
#define WSTACK_FAST_PUSH(s, x)                  \
do {						\
    ASSERT(s.wsp < s.wend);                     \
    *s.wsp++ = (x);                             \
} while(0)

#define WSTACK_COUNT(s) (s.wsp - s.wstart)
#define WSTACK_ISEMPTY(s) (s.wsp == s.wstart)
#define WSTACK_POP(s) ((ASSERT(s.wsp > s.wstart)),*(--s.wsp))

#define WSTACK_ROLLBACK(s, count) (ASSERT(WSTACK_COUNT(s) >= (count)), \
                                   s.wsp = s.wstart + (count))

/* PSTACK - Stack of any type.
 * Usage:
 * {
 * #define PSTACK_TYPE MyType
 *    PSTACK_DECLARE(s,16);
 *    MyType *sp = PSTACK_PUSH(s);
 *
 *    sp->x = ....
 *    sp->y = ....
 *    sp = PSTACK_PUSH(s);
 *    ...
 *    sp = PSTACK_POP(s);
 *    if (PSTACK_IS_EMPTY(s)) {
 *        // sp is invalid when stack is empty after pop
 *    }
 *
 *    PSTACK_DESTROY(s);
 * }
 */


typedef struct ErtsPStack_ {
    byte* pstart;
    int offs;   /* "stack pointer" as byte offset from pstart */
    int size;   /* allocated size in bytes */
    ErtsAlcType_t alloc_type;
}ErtsPStack;

void erl_grow_pstack(ErtsPStack* s, void* default_pstack, unsigned need_bytes);
#define PSTK_CONCAT(a,b) a##b
#define PSTK_DEF_STACK(s) PSTK_CONCAT(s,_default_pstack)

#define PSTACK_DECLARE(s, DEF_PSTACK_SIZE) \
PSTACK_TYPE PSTK_DEF_STACK(s)[DEF_PSTACK_SIZE];                            \
ErtsPStack s = { (byte*)PSTK_DEF_STACK(s), /* pstart */                    \
                 -(int)sizeof(PSTACK_TYPE), /* offs */                     \
                 DEF_PSTACK_SIZE*sizeof(PSTACK_TYPE), /* size */           \
                 ERTS_ALC_T_ESTACK   /* alloc_type */                      \
}

#define PSTACK_CHANGE_ALLOCATOR(s,t)					\
do {									\
    if (s.pstart != (byte*)PSTK_DEF_STACK(s)) {				\
	erts_exit(ERTS_ERROR_EXIT, "Internal error - trying to change allocator "	\
		 "type of active pstack\n");				\
    }									\
    s.alloc_type = (t);							\
 } while (0)

#define PSTACK_DESTROY(s)				\
do {							\
    if (s.pstart != (byte*)PSTK_DEF_STACK(s)) {		\
	erts_free(s.alloc_type, s.pstart); 		\
    }							\
} while(0)

#define PSTACK_IS_EMPTY(s) (s.offs < 0)

#define PSTACK_COUNT(s) ((s.offs + sizeof(PSTACK_TYPE)) / sizeof(PSTACK_TYPE))

#define PSTACK_TOP(s) (ASSERT(!PSTACK_IS_EMPTY(s)), \
                       (PSTACK_TYPE*)(s.pstart + s.offs))

#define PSTACK_PUSH(s) 		                                            \
    (s.offs += sizeof(PSTACK_TYPE),                                         \
     ((s.offs == s.size) ? erl_grow_pstack(&s, PSTK_DEF_STACK(s),           \
                                          sizeof(PSTACK_TYPE)) : (void)0),  \
     ((PSTACK_TYPE*) (s.pstart + s.offs)))

#define PSTACK_POP(s) ((s.offs -= sizeof(PSTACK_TYPE)), \
                       (PSTACK_TYPE*)(s.pstart + s.offs))

/*
 * Do not free the stack after this, it may have pointers into what
 * was saved in 'dst'.
 */
#define PSTACK_SAVE(s,dst)\
do {\
    if (s.pstart == (byte*)PSTK_DEF_STACK(s)) {\
	UWord _pbytes = PSTACK_COUNT(s) * sizeof(PSTACK_TYPE);\
	(dst)->pstart = erts_alloc(s.alloc_type,\
				   sizeof(PSTK_DEF_STACK(s)));\
	sys_memcpy((dst)->pstart, s.pstart, _pbytes);\
	(dst)->offs = s.offs;\
	(dst)->size = s.size;\
	(dst)->alloc_type = s.alloc_type;\
    } else\
        *(dst) = s;\
 } while (0)

/*
 * Use on empty stack, only the allocator can be changed before this.
 * The src stack is reset to NULL.
 */
#define PSTACK_RESTORE(s, src)			        \
do {						        \
    ASSERT(s.pstart == (byte*)PSTK_DEF_STACK(s));	\
    s = *(src);  /* struct copy */		        \
    (src)->pstart = NULL;			        \
    ASSERT(s.offs >= -(int)sizeof(PSTACK_TYPE));        \
    ASSERT(s.offs < s.size);			        \
} while (0)

#define PSTACK_DESTROY_SAVED(pstack)\
do {\
    if ((pstack)->pstart) {\
	erts_free((pstack)->alloc_type, (pstack)->pstart);\
	(pstack)->pstart = NULL;\
    }\
} while(0)


/*
 *  An implementation of lightweight unbounded queues,
 *  using a circular dynamic array.
 *  It does not include support for change_allocator.
 *
 *  Use it like this:
 *
 *  DECLARE_EQUEUE(Queue)	(At the start of a block)
 *  ...
 *  EQUEUE_PUT(Queue, Term)
 *  ...
 *  if (EQUEUE_ISEMPTY(Queue)) {
 *     Queue is empty
 *  } else {
 *     Term = EQUEUE_GET(Stack);
 *     Process popped Term here
 *  }
 *  ...
 *  DESTROY_EQUEUE(Queue)
 */

typedef struct {
    Eterm* start;
    Eterm* front;
    Eterm* back;
    int possibly_empty;
    Eterm* end;
    ErtsAlcType_t alloc_type;
} ErtsEQueue;

#define DEF_EQUEUE_SIZE (16)

void erl_grow_equeue(ErtsEQueue*, Eterm* def_queue);
#define EQUE_CONCAT(a,b) a##b
#define EQUE_DEF_QUEUE(q) EQUE_CONCAT(q,_default_equeue)

#define DECLARE_EQUEUE(q)				\
    UWord EQUE_DEF_QUEUE(q)[DEF_EQUEUE_SIZE];     	\
    ErtsEQueue q = {					\
        EQUE_DEF_QUEUE(q), /* start */			\
        EQUE_DEF_QUEUE(q), /* front */			\
        EQUE_DEF_QUEUE(q), /* back */			\
        1,                 /* possibly_empty */		\
        EQUE_DEF_QUEUE(q) + DEF_EQUEUE_SIZE, /* end */	\
        ERTS_ALC_T_ESTACK  /* alloc_type */		\
    }

#define DESTROY_EQUEUE(q)				\
do {							\
    if (q.start != EQUE_DEF_QUEUE(q)) {			\
      erts_free(q.alloc_type, q.start);			\
    }							\
} while(0)

#define EQUEUE_PUT_UNCHECKED(q, x)			\
do {							\
    q.possibly_empty = 0;				\
    *(q.back) = (x);                    		\
    if (++(q.back) == q.end) {				\
	q.back = q.start;				\
    }							\
} while(0)

#define EQUEUE_PUT(q, x)				\
do {							\
    if (q.back == q.front && !q.possibly_empty) {	\
        erl_grow_equeue(&q, EQUE_DEF_QUEUE(q));		\
    }							\
    EQUEUE_PUT_UNCHECKED(q, x);				\
} while(0)

#define EQUEUE_ISEMPTY(q) (q.back == q.front && q.possibly_empty)

ERTS_GLB_INLINE Eterm erts_equeue_get(ErtsEQueue *q);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE Eterm erts_equeue_get(ErtsEQueue *q) {
    Eterm x;
    q->possibly_empty = 1;
    x = *(q->front);
    if (++(q->front) == q->end) {
        q->front = q->start;
    }
    return x;
}
#endif
#define EQUEUE_GET(q) erts_equeue_get(&(q));

/* binary.c */

void erts_emasculate_writable_binary(ProcBin* pb);
Eterm erts_new_heap_binary(Process *p, byte *buf, int len, byte** datap);
Eterm erts_new_mso_binary(Process*, byte*, Uint);
Eterm new_binary(Process*, byte*, Uint);
Eterm erts_realloc_binary(Eterm bin, size_t size);
Eterm erts_build_proc_bin(ErlOffHeap*, Eterm*, Binary*);

/* erl_bif_info.c */

Eterm
erts_bld_port_info(Eterm **hpp,
		   ErlOffHeap *ohp,
		   Uint *szp,
		   Port *prt,
		   Eterm item); 

void erts_bif_info_init(void);

/* bif.c */

void erts_queue_monitor_message(Process *,
				ErtsProcLocks*,
				Eterm,
				Eterm,
				Eterm,
				Eterm);
void erts_init_trap_export(Export* ep, Eterm m, Eterm f, Uint a,
			   Eterm (*bif)(Process*, Eterm*, BeamInstr*));
void erts_init_bif(void);
Eterm erl_send(Process *p, Eterm to, Eterm msg);
int erts_set_group_leader(Process *proc, Eterm new_gl);

/* erl_bif_op.c */

Eterm erl_is_function(Process* p, Eterm arg1, Eterm arg2);

/* beam_bif_load.c */
Eterm erts_check_process_code(Process *c_p, Eterm module, int *redsp, int fcalls);
Eterm erts_proc_copy_literal_area(Process *c_p, int *redsp, int fcalls, int gc_allowed);

typedef struct ErtsLiteralArea_ {
    struct erl_off_heap_header *off_heap;
    Eterm *end;
    Eterm start[1]; /* beginning of area */
} ErtsLiteralArea;

#define ERTS_LITERAL_AREA_ALLOC_SIZE(N) \
    (sizeof(ErtsLiteralArea) + sizeof(Eterm)*((N) - 1))

extern erts_atomic_t erts_copy_literal_area__;
#define ERTS_COPY_LITERAL_AREA()					\
    ((ErtsLiteralArea *) erts_atomic_read_nob(&erts_copy_literal_area__))
extern Process *erts_literal_area_collector;

extern Process *erts_code_purger;

/* beam_load.c */
typedef struct {
    ErtsCodeMFA* mfa;		/* Pointer to: Mod, Name, Arity */
    Uint needed;		/* Heap space needed for entire tuple */
    Uint32 loc;			/* Location in source code */
    Eterm* fname_ptr;		/* Pointer to fname table */
} FunctionInfo;

Binary* erts_alloc_loader_state(void);
Eterm erts_module_for_prepared_code(Binary* magic);
Eterm erts_has_code_on_load(Binary* magic);
Eterm erts_prepare_loading(Binary* loader_state,  Process *c_p,
			   Eterm group_leader, Eterm* modp,
			   byte* code, Uint size);
Eterm erts_finish_loading(Binary* loader_state, Process* c_p,
			  ErtsProcLocks c_p_locks, Eterm* modp);
Eterm erts_preload_module(Process *c_p, ErtsProcLocks c_p_locks,
			  Eterm group_leader, Eterm* mod, byte* code, Uint size);
void init_load(void);
ErtsCodeMFA* find_function_from_pc(BeamInstr* pc);
Eterm* erts_build_mfa_item(FunctionInfo* fi, Eterm* hp,
			   Eterm args, Eterm* mfa_p);
void erts_set_current_function(FunctionInfo* fi, ErtsCodeMFA* mfa);
Eterm erts_module_info_0(Process* p, Eterm module);
Eterm erts_module_info_1(Process* p, Eterm module, Eterm what);
Eterm erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info);
int erts_commit_hipe_patch_load(Eterm hipe_magic_bin);

/* beam_ranges.c */
void erts_init_ranges(void);
void erts_start_staging_ranges(int num_new);
void erts_end_staging_ranges(int commit);
void erts_update_ranges(BeamInstr* code, Uint size);
void erts_remove_from_ranges(BeamInstr* code);
UWord erts_ranges_sz(void);
void erts_lookup_function_info(FunctionInfo* fi, BeamInstr* pc, int full_info);
extern ErtsLiteralArea** erts_dump_lit_areas;
extern Uint erts_dump_num_lit_areas;

/* break.c */
void init_break_handler(void);
void erts_set_ignore_break(void);
void erts_replace_intr(void);
void process_info(fmtfn_t, void *);
void print_process_info(fmtfn_t, void *, Process*);
void info(fmtfn_t, void *);
void loaded(fmtfn_t, void *);
void erts_print_base64(fmtfn_t to, void *to_arg, byte* src, Uint size);

/* sighandler sys.c */
int erts_set_signal(Eterm signal, Eterm type);

/* erl_arith.c */
double erts_get_positive_zero_float(void);

/* config.c */

__decl_noreturn void __noreturn erts_exit_epilogue(void);
__decl_noreturn void __noreturn erts_exit(int n, char*, ...);
__decl_noreturn void __noreturn erts_flush_async_exit(int n, char*, ...);
void erl_error(char*, va_list);

/* This controls whether sharing-preserving copy is used by Erlang */

#ifdef SHCOPY
#define SHCOPY_SEND
#define SHCOPY_SPAWN
#endif

/* The persistent state while the sharing-preserving copier works */

typedef struct {
    Eterm  queue_default[DEF_EQUEUE_SIZE];
    Eterm* queue_start;
    Eterm* queue_end;
    ErtsAlcType_t queue_alloc_type;
    UWord  bitstore_default[DEF_WSTACK_SIZE];
    UWord* bitstore_start;
    ErtsAlcType_t bitstore_alloc_type;
    Eterm  shtable_default[DEF_ESTACK_SIZE];
    Eterm* shtable_start;
    ErtsAlcType_t shtable_alloc_type;
    Uint literal_size;
    Eterm *lit_purge_ptr;
    Uint lit_purge_sz;
} erts_shcopy_t;

#define INITIALIZE_SHCOPY(info)						\
    do {								\
	ErtsLiteralArea *larea__ = ERTS_COPY_LITERAL_AREA();		\
	info.queue_start = info.queue_default;				\
	info.bitstore_start = info.bitstore_default;			\
	info.shtable_start = info.shtable_default;			\
	info.literal_size = 0;						\
	if (larea__) {							\
	    info.lit_purge_ptr = &larea__->start[0];			\
	    info.lit_purge_sz = larea__->end - info.lit_purge_ptr;	\
	}								\
	else {								\
	    info.lit_purge_ptr = NULL;					\
	    info.lit_purge_sz = 0;					\
	}								\
    } while(0)

#define DESTROY_SHCOPY(info)                                            \
do {                                                                    \
    if (info.queue_start != info.queue_default) {                       \
        erts_free(info.queue_alloc_type, info.queue_start);             \
    }                                                                   \
    if (info.bitstore_start != info.bitstore_default) {                 \
        erts_free(info.bitstore_alloc_type, info.bitstore_start);       \
    }                                                                   \
    if (info.shtable_start != info.shtable_default) {                   \
        erts_free(info.shtable_alloc_type, info.shtable_start);         \
    }                                                                   \
} while(0)

/* copy.c */
typedef struct {
    Eterm *lit_purge_ptr;
    Uint lit_purge_sz;
} erts_literal_area_t;

#define INITIALIZE_LITERAL_PURGE_AREA(Area)				\
    do {								\
	ErtsLiteralArea *larea__ = ERTS_COPY_LITERAL_AREA();		\
	if (larea__) {							\
	    (Area).lit_purge_ptr = &larea__->start[0];			\
	    (Area).lit_purge_sz = larea__->end - (Area).lit_purge_ptr;	\
	}								\
	else {								\
	    (Area).lit_purge_ptr = NULL;				\
	    (Area).lit_purge_sz = 0;					\
	}								\
    } while(0)

Eterm copy_object_x(Eterm, Process*, Uint);
#define copy_object(Term, Proc) copy_object_x(Term,Proc,0)

Uint size_object_x(Eterm, erts_literal_area_t*);
#define size_object(Term) size_object_x(Term,NULL)
#define size_object_litopt(Term,LitArea) size_object_x(Term,LitArea)

Uint copy_shared_calculate(Eterm, erts_shcopy_t*);
Eterm copy_shared_perform(Eterm, Uint, erts_shcopy_t*, Eterm**, ErlOffHeap*);

Uint size_shared(Eterm);

Eterm copy_struct_x(Eterm, Uint, Eterm**, ErlOffHeap*, Uint*, erts_literal_area_t*);
#define copy_struct(Obj,Sz,HPP,OH) \
    copy_struct_x(Obj,Sz,HPP,OH,NULL,NULL)
#define copy_struct_litopt(Obj,Sz,HPP,OH,LitArea) \
    copy_struct_x(Obj,Sz,HPP,OH,NULL,LitArea)

Eterm copy_shallow(Eterm* ERTS_RESTRICT, Uint, Eterm**, ErlOffHeap*);

void erts_move_multi_frags(Eterm** hpp, ErlOffHeap*, ErlHeapFragment* first,
			   Eterm* refs, unsigned nrefs, int literals);

/* Utilities */
void erts_monitor_nodes_delete(ErtsMonitor *);
extern Eterm erts_monitor_nodes(Process *, Eterm, Eterm);
extern Eterm erts_processes_monitoring_nodes(Process *);
extern int erts_do_net_exits(DistEntry*, Eterm);
extern int distribution_info(fmtfn_t, void *);
extern int is_node_name_atom(Eterm a);

extern int erts_net_message(Port *, DistEntry *,
			    byte *, ErlDrvSizeT, byte *, ErlDrvSizeT);

extern void init_dist(void);
extern int stop_dist(void);

void erl_progressf(char* format, ...);

#ifdef MESS_DEBUG
void print_pass_through(int, byte*, int);
#endif

/* beam_emu.c */
int catchlevel(Process*);
void init_emulator(void);
void process_main(Eterm* x_reg_array, FloatDef* f_reg_array);
void erts_dirty_process_main(ErtsSchedulerData *);
Eterm build_stacktrace(Process* c_p, Eterm exc);
Eterm expand_error_value(Process* c_p, Uint freason, Eterm Value);
void erts_save_stacktrace(Process* p, struct StackTrace* s, int depth);

/* erl_init.c */

typedef struct {
    Eterm delay_time;
    int context_reds;
} ErtsModifiedTimings;

extern Export *erts_delay_trap;
extern int erts_modified_timing_level;
extern ErtsModifiedTimings erts_modified_timings[];
#define ERTS_USE_MODIFIED_TIMING() \
  (erts_modified_timing_level >= 0)
#define ERTS_MODIFIED_TIMING_DELAY \
  (erts_modified_timings[erts_modified_timing_level].delay_time)
#define ERTS_MODIFIED_TIMING_CONTEXT_REDS \
  (erts_modified_timings[erts_modified_timing_level].context_reds)
#define ERTS_MODIFIED_TIMING_INPUT_REDS \
  (erts_modified_timings[erts_modified_timing_level].input_reds)

extern int erts_no_line_info;
extern Eterm erts_error_logger_warnings;
extern int erts_initialized;
extern int erts_compat_rel;
void erl_start(int, char**);
void erts_usage(void);
Eterm erts_preloaded(Process* p);


/* erl_md5.c */

typedef struct {
    Uint32 state[4];		/* state (ABCD) */
    Uint32 count[2];		/* number of bits, modulo 2^64 (lsb first) */
    unsigned char buffer[64];	/* input buffer */
} MD5_CTX;

void MD5Init(MD5_CTX *);
void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
void MD5Final(unsigned char [16], MD5_CTX *);


/* io.c */

typedef struct {
    char *name;
    char *driver_name;
} ErtsPortNames;

#define ERTS_SPAWN_DRIVER 1
#define ERTS_SPAWN_EXECUTABLE 2
#define ERTS_SPAWN_ANY (ERTS_SPAWN_DRIVER | ERTS_SPAWN_EXECUTABLE)
int erts_add_driver_entry(ErlDrvEntry *drv, DE_Handle *handle, int driver_list_locked, int taint);
void erts_destroy_driver(erts_driver_t *drv);
int erts_save_suspend_process_on_port(Port*, Process*);
Port *erts_open_driver(erts_driver_t*, Eterm, char*, SysDriverOpts*, int *, int *);
void erts_init_io(int, int, int);
void erts_raw_port_command(Port*, byte*, Uint);
void driver_report_exit(ErlDrvPort, int);
LineBuf* allocate_linebuf(int);
int async_ready(Port *, void*);
ErtsPortNames *erts_get_port_names(Eterm, ErlDrvPort);
void erts_free_port_names(ErtsPortNames *);
Uint erts_port_ioq_size(Port *pp);
void erts_stale_drv_select(Eterm, ErlDrvPort, ErlDrvEvent, int, int);

Port *erts_get_heart_port(void);
void erts_emergency_close_ports(void);
void erts_ref_to_driver_monitor(Eterm ref, ErlDrvMonitor *mon);
Eterm erts_driver_monitor_to_ref(Eterm* hp, const ErlDrvMonitor *mon);

#if defined(ERTS_ENABLE_LOCK_COUNT)
void erts_lcnt_update_driver_locks(int enable);
void erts_lcnt_update_port_locks(int enable);
#endif

/* driver_tab.c */
typedef struct {
    ErlDrvEntry* de;
    int taint;
} ErtsStaticDriver;
typedef void *(*ErtsStaticNifInitFPtr)(void);
typedef struct ErtsStaticNifEntry_ {
    const char *nif_name;
    ErtsStaticNifInitFPtr nif_init;
    int taint;
} ErtsStaticNifEntry;
ErtsStaticNifEntry* erts_static_nif_get_nif_init(const char *name, int len);
int erts_is_static_nif(void *handle);
void erts_init_static_drivers(void);

/* erl_drv_thread.c */
void erl_drv_thr_init(void);

/* utils.c */
void erts_cleanup_offheap(ErlOffHeap *offheap);

Uint64 erts_timestamp_millis(void);

Export* erts_find_function(Eterm, Eterm, unsigned int, ErtsCodeIndex);

void *erts_calc_stacklimit(char *prev_c, UWord stacksize);
int erts_check_below_limit(char *ptr, char *limit);
int erts_check_above_limit(char *ptr, char *limit);
void *erts_ptr_id(void *ptr);

Eterm store_external_or_ref_in_proc_(Process *, Eterm);
Eterm store_external_or_ref_(Uint **, ErlOffHeap*, Eterm);

#define NC_HEAP_SIZE(NC) \
 (ASSERT(is_node_container((NC))), \
  IS_CONST((NC)) ? 0 : (thing_arityval(*boxed_val((NC))) + 1))
#define STORE_NC(Hpp, ETpp, NC) \
 (ASSERT(is_node_container((NC))), \
  IS_CONST((NC)) ? (NC) : store_external_or_ref_((Hpp), (ETpp), (NC)))
#define STORE_NC_IN_PROC(Pp, NC) \
 (ASSERT(is_node_container((NC))), \
  IS_CONST((NC)) ? (NC) : store_external_or_ref_in_proc_((Pp), (NC)))

/* duplicates from big.h */
int term_to_Uint(Eterm term, Uint *up);
int term_to_UWord(Eterm, UWord*);

#ifdef HAVE_ERTS_NOW_CPU
extern int erts_cpu_timestamp;
#endif
/* erl_bif_chksum.c */
void erts_init_bif_chksum(void);
/* erl_bif_re.c */
void erts_init_bif_re(void);
Sint erts_re_set_loop_limit(Sint limit);
/* erl_bif_binary.c */
void erts_init_bif_binary(void);
Sint erts_binary_set_loop_limit(Sint limit);

/* external.c */
void erts_init_external(void);

/* erl_map.c */
void erts_init_map(void);

/* beam_debug.c */
UWord erts_check_stack_recursion_downwards(char *start_c);
UWord erts_check_stack_recursion_upwards(char *start_c);
int erts_is_above_stack_limit(char *ptr);

/* erl_unicode.c */
void erts_init_unicode(void);
Sint erts_unicode_set_loop_limit(Sint limit);

void erts_native_filename_put(Eterm ioterm, int encoding, byte *p) ;
Sint erts_native_filename_need(Eterm ioterm, int encoding);
void erts_copy_utf8_to_utf16_little(byte *target, byte *bytes, int num_chars);
int erts_analyze_utf8(byte *source, Uint size, 
			byte **err_pos, Uint *num_chars, int *left);
int erts_analyze_utf8_x(byte *source, Uint size, 
			byte **err_pos, Uint *num_chars, int *left,
			Sint *num_latin1_chars, Uint max_chars);
char *erts_convert_filename_to_native(Eterm name, char *statbuf, 
				      size_t statbuf_size, 
				      ErtsAlcType_t alloc_type, 
				      int allow_empty, int allow_atom,
				      Sint *used /* out */);
char *erts_convert_filename_to_encoding(Eterm name, char *statbuf,
					size_t statbuf_size,
					ErtsAlcType_t alloc_type,
					int allow_empty, int allow_atom,
					int encoding,
					Sint *used /* out */,
					Uint extra);
char* erts_convert_filename_to_wchar(byte* bytes, Uint size,
                                     char *statbuf, size_t statbuf_size,
                                     ErtsAlcType_t alloc_type, Sint* used,
                                     Uint extra_wchars);
Eterm erts_convert_native_to_filename(Process *p, size_t size, byte *bytes);
Eterm erts_utf8_to_list(Process *p, Uint num, byte *bytes, Uint sz, Uint left,
			Uint *num_built, Uint *num_eaten, Eterm tail);
int erts_utf8_to_latin1(byte* dest, const byte* source, int slen);
#define ERTS_UTF8_OK 0
#define ERTS_UTF8_INCOMPLETE 1
#define ERTS_UTF8_ERROR 2
#define ERTS_UTF8_ANALYZE_MORE 3
#define ERTS_UTF8_OK_MAX_CHARS 4

void bin_write(fmtfn_t, void*, byte*, size_t);
Sint intlist_to_buf(Eterm, char*, Sint); /* most callers pass plain char*'s */
int erts_unicode_list_to_buf(Eterm list, byte *buf, Sint len, Sint* written);
Sint erts_unicode_list_to_buf_len(Eterm list);

struct Sint_buf {
#if defined(ARCH_64)
    char s[22];
#else
    char s[12];
#endif
};	
char* Sint_to_buf(Sint, struct Sint_buf*);

#define ERTS_IOLIST_STATE_INITER(C_P, OBJ)	\
    {(C_P), 0, 0, (OBJ), {NULL, NULL, NULL, ERTS_ALC_T_INVALID}, 0, 0}

#define ERTS_IOLIST_STATE_MOVE(TO, FROM)	\
    sys_memcpy((void *) (TO), (void *) (FROM), sizeof(ErtsIOListState))

#define ERTS_IOLIST_SIZE_YIELDS_COUNT_PER_RED 8

typedef struct {
    Process *c_p;
    ErlDrvSizeT size;
    Uint offs;
    Eterm obj;
    ErtsEStack estack;
    int reds_left;
    int have_size;
} ErtsIOListState;

#define ERTS_IOLIST2BUF_STATE_INITER(C_P, OBJ)	\
    {ERTS_IOLIST_STATE_INITER((C_P), (OBJ)), {NULL, 0, 0, 0}, NULL, 0, NULL, 0}

#define ERTS_IOLIST2BUF_STATE_MOVE(TO, FROM)	\
    sys_memcpy((void *) (TO), (void *) (FROM), sizeof(ErtsIOList2BufState))

#define ERTS_IOLIST_TO_BUF_BYTES_PER_YIELD_COUNT 32
#define ERTS_IOLIST_TO_BUF_YIELD_COUNT_PER_RED 8
#define ERTS_IOLIST_TO_BUF_BYTES_PER_RED \
    (ERTS_IOLIST_TO_BUF_YIELD_COUNT_PER_RED*ERTS_IOLIST_TO_BUF_BYTES_PER_YIELD_COUNT)

typedef struct {
    ErtsIOListState iolist;
    struct {
	byte *bptr;
	size_t size;
	Uint bitoffs;
	Uint bitsize;
    } bcopy;
    char *buf;
    ErlDrvSizeT len;
    Eterm *objp;
    int offset;
} ErtsIOList2BufState;

#define ERTS_IOLIST_OK 0
#define ERTS_IOLIST_OVERFLOW 1
#define ERTS_IOLIST_TYPE 2
#define ERTS_IOLIST_YIELD 3

Eterm buf_to_intlist(Eterm**, const char*, size_t, Eterm); /* most callers pass plain char*'s */

#define ERTS_IOLIST_TO_BUF_OVERFLOW	(~((ErlDrvSizeT) 0))
#define ERTS_IOLIST_TO_BUF_TYPE_ERROR	(~((ErlDrvSizeT) 1))
#define ERTS_IOLIST_TO_BUF_YIELD	(~((ErlDrvSizeT) 2))
#define ERTS_IOLIST_TO_BUF_FAILED(R) \
    (((R) & (~((ErlDrvSizeT) 3))) == (~((ErlDrvSizeT) 3)))
#define ERTS_IOLIST_TO_BUF_SUCCEEDED(R) \
    (!ERTS_IOLIST_TO_BUF_FAILED((R)))

ErlDrvSizeT erts_iolist_to_buf(Eterm, char*, ErlDrvSizeT);
ErlDrvSizeT erts_iolist_to_buf_yielding(ErtsIOList2BufState *);
int erts_iolist_size_yielding(ErtsIOListState *state);
int erts_iolist_size(Eterm, ErlDrvSizeT *);
Sint is_string(Eterm);
void erl_at_exit(void (*) (void*), void*);
Eterm collect_memory(Process *);
void dump_memory_to_fd(int);
int dump_memory_data(const char *);

Eterm erts_mixed_plus(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_mixed_minus(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_mixed_times(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_mixed_div(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_int_div(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_int_rem(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_band(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_bor(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_bxor(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_bnot(Process* p, Eterm arg);

Eterm erts_gc_mixed_plus(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_mixed_minus(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_mixed_times(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_mixed_div(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_int_div(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_int_rem(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_band(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_bor(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_bxor(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_bnot(Process* p, Eterm* reg, Uint live);

Uint erts_current_reductions(Process* current, Process *p);

int erts_print_system_version(fmtfn_t to, void *arg, Process *c_p);

int erts_hibernate(Process* c_p, Eterm* reg);

ERTS_GLB_FORCE_INLINE int erts_is_literal(Eterm tptr, Eterm *ptr);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_FORCE_INLINE int erts_is_literal(Eterm tptr, Eterm *ptr)
{
    ASSERT(is_boxed(tptr) || is_list(tptr));
    ASSERT(ptr == ptr_val(tptr));

#if defined(ERTS_HAVE_IS_IN_LITERAL_RANGE)
    return erts_is_in_literal_range(ptr);
#elif defined(TAG_LITERAL_PTR)
    return is_literal_ptr(tptr);
#else
#  error Not able to detect literals...
#endif

}

#endif

Eterm erts_msacc_request(Process *c_p, int action, Eterm *threads);

/*
** Call_trace uses this API for the parameter matching functions
*/

#define MatchSetRef(MPSP) 			\
do {						\
    if ((MPSP) != NULL) {			\
	erts_refc_inc(&(MPSP)->intern.refc, 1);	\
    }						\
} while (0)

#define MatchSetUnref(MPSP)					\
do {								\
    if (((MPSP) != NULL)) {                                     \
	erts_bin_release(MPSP);					\
    }								\
} while(0)

#define MatchSetGetSource(MPSP) erts_match_set_get_source(MPSP)

extern Binary *erts_match_set_compile(Process *p, Eterm matchexpr, Eterm MFA);
extern void erts_match_set_release_result(Process* p);
ERTS_GLB_INLINE void erts_match_set_release_result_trace(Process* p, Eterm);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE
void erts_match_set_release_result_trace(Process* p, Eterm pam_result)
{
    if (is_not_immed(pam_result))
        erts_match_set_release_result(p);
}
#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */

enum erts_pam_run_flags {
    ERTS_PAM_TMP_RESULT=1,
    ERTS_PAM_COPY_RESULT=2,
    ERTS_PAM_CONTIGUOUS_TUPLE=4,
    ERTS_PAM_IGNORE_TRACE_SILENT=8
};
extern Eterm erts_match_set_run_trace(Process *p,
                                      Process *self,
                                      Binary *mpsp,
                                      Eterm *args, int num_args,
                                      enum erts_pam_run_flags in_flags,
                                      Uint32 *return_flags);
extern Eterm erts_match_set_get_source(Binary *mpsp);
extern void erts_match_prog_foreach_offheap(Binary *b,
					    void (*)(ErlOffHeap *, void *),
					    void *);

#define MATCH_SET_RETURN_TRACE    (0x1) /* return trace requested */
#define MATCH_SET_RETURN_TO_TRACE (0x2) /* Misleading name, it is not actually
					   set by the match program, but by the
					   breakpoint functions */
#define MATCH_SET_EXCEPTION_TRACE (0x4) /* exception trace requested */
#define MATCH_SET_RX_TRACE (MATCH_SET_RETURN_TRACE|MATCH_SET_EXCEPTION_TRACE)

extern erts_driver_t vanilla_driver;
extern erts_driver_t spawn_driver;
extern erts_driver_t forker_driver;
extern erts_driver_t fd_driver;

int erts_beam_jump_table(void);

#define DeclareTmpHeap(VariableName,Size,Process) \
     Eterm VariableName[Size]
#define DeclareTypedTmpHeap(Type,VariableName,Process)	\
     Type VariableName[1]
#define DeclareTmpHeapNoproc(VariableName,Size) \
     Eterm VariableName[Size]
#define UseTmpHeap(Size,Proc) /* Nothing */
#define UnUseTmpHeap(Size,Proc) /* Nothing */
#define UseTmpHeapNoproc(Size) /* Nothing */
#define UnUseTmpHeapNoproc(Size) /* Nothing */

ERTS_GLB_INLINE void dtrace_pid_str(Eterm pid, char *process_buf);
ERTS_GLB_INLINE void dtrace_proc_str(Process *process, char *process_buf);
ERTS_GLB_INLINE void dtrace_port_str(Port *port, char *port_buf);
ERTS_GLB_INLINE void dtrace_fun_decode(Process *process, ErtsCodeMFA *mfa,
				       char *process_buf, char *mfa_buf);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

#include "dtrace-wrapper.h"

ERTS_GLB_INLINE void
dtrace_pid_str(Eterm pid, char *process_buf)
{
    if (is_pid(pid))
        erts_snprintf(process_buf, DTRACE_TERM_BUF_SIZE, "<%lu.%lu.%lu>",
                      pid_channel_no(pid),
                      pid_number(pid),
                      pid_serial(pid));
    else if (is_port(pid))
        erts_snprintf(process_buf, DTRACE_TERM_BUF_SIZE, "#Port<%lu.%lu>",
                      port_channel_no(pid),
                      port_number(pid));
}

ERTS_GLB_INLINE void
dtrace_proc_str(Process *process, char *process_buf)
{
    dtrace_pid_str(process->common.id, process_buf);
}

ERTS_GLB_INLINE void
dtrace_port_str(Port *port, char *port_buf)
{
    dtrace_pid_str(port->common.id, port_buf);
}

ERTS_GLB_INLINE void
dtrace_fun_decode(Process *process, ErtsCodeMFA *mfa,
                  char *process_buf, char *mfa_buf)
{
    if (process_buf) {
        dtrace_proc_str(process, process_buf);
    }

    erts_snprintf(mfa_buf, DTRACE_TERM_BUF_SIZE, "%T:%T/%d",
                  mfa->module, mfa->function, mfa->arity);
}

#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */

#endif /* !__GLOBAL_H__ */