aboutsummaryrefslogblamecommitdiffstats
path: root/erts/lib_src/ose/ethread.c
blob: 7d5101d115e9e22bdad889b65796b6d6eafea040 (plain) (tree)
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













































































































































































































































































































































































































































































































































































































































































                                                                                                             
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 2010-2011. All Rights Reserved.
 *
 * The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved online at http://www.erlang.org/.
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * %CopyrightEnd%
 */

/*
 * Description: OSE implementation of the ethread library
 * Author: Lukas Larsson
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#ifdef ETHR_TIME_WITH_SYS_TIME
#  include <time.h>
#  include <sys/time.h>
#else
#  ifdef ETHR_HAVE_SYS_TIME_H
#    include <sys/time.h>
#  else
#    include <time.h>
#  endif
#endif
#include <sys/types.h>
#include <unistd.h>

#include <limits.h>

#define ETHR_INLINE_FUNC_NAME_(X) X ## __
#define ETHREAD_IMPL__

#include "ethread.h"
#include "ethr_internal.h"

#include "erl_printf.h"
#include "efs.h"

#include "ose_spi.h"

#include "string.h"

#ifndef ETHR_HAVE_ETHREAD_DEFINES
#error Missing configure defines
#endif

#define ETHR_INVALID_TID_ID -1

static ethr_tid main_thr_tid;
static const char* own_tid_key = "ethread_own_tid";
char* ethr_ts_event_key__ = "ethread_tse";

#define ETHREADWRAPDATASIG 1

/* Init data sent to thr_wrapper() */
typedef struct {
    SIGSELECT sig_no;
    ethr_ts_event *tse;
    ethr_tid *tid;
    ethr_sint32_t result;
    void *(*thr_func)(void *);
    void *arg;
    void *prep_func_res;
    const char *name;
} ethr_thr_wrap_data__;

union SIGNAL {
  SIGSELECT sig_no;
  ethr_thr_wrap_data__ data;
};

#define ETHR_GET_OWN_TID__	((ethr_tid *) get_envp(current_process(),\
						       own_tid_key))

/*
 * --------------------------------------------------------------------------
 * Static functions
 * --------------------------------------------------------------------------
 */

static PROCESS blockId(void) {
   static PROCESS bid = (PROCESS)0;

   if (bid == 0) {
      bid = create_block("Erlang-VM", 0, 0, 0, 0);
   }

   return bid;
}

static void thr_exit_cleanup(ethr_tid *tid, void *res)
{

     ETHR_ASSERT(tid == ETHR_GET_OWN_TID__);

     tid->res = res;

     ethr_run_exit_handlers__();
     ethr_ts_event_destructor__((void *) ethr_get_tse__());
}

/* For debug purpose. The process name will be stored in a per-process pointer
 * for quick access.
 */
static OSPPDKEY nameKey = 0;

//static OS_PROCESS(thr_wrapper);
static OS_PROCESS(thr_wrapper)
{
    ethr_tid my_tid;
    ethr_sint32_t result;
    void *res;
    void *(*thr_func)(void *);
    void *arg;
    ethr_ts_event *tsep = NULL;

    {
       PROCESS pid = current_process();

       const char *execMode = get_pid_info(pid, OSE_PI_SUPERVISOR)
          ? "Supervisor"
          : "User";
       PROCESS     bid      = get_bid(pid);

       /* In the call below, 16 is a secret number provided by frbr that makes
        * the function return current domain. */
       OSADDRESS   domain   = get_pid_info(current_process(), 16);

       fprintf(stderr,"[0x%x] New process. Bid:0x%x, domain:%d, exec mode:%s\n",
               current_process(), bid, domain, execMode);
    }

    {
       SIGSELECT sigsel[] = {1,ETHREADWRAPDATASIG};
       union SIGNAL *init_msg = receive(sigsel);

       {
          char **name = (char**)ose_get_ppdata(nameKey);

          *name = (char*)alloc(strlen(init_msg->data.name)+1, 0);
          strcpy(*name, init_msg->data.name);
       }

       thr_func = init_msg->data.thr_func;
       arg      = init_msg->data.arg;

       result = (ethr_sint32_t) ethr_make_ts_event__(&tsep);

       if (result == 0) {
          tsep->iflgs |= ETHR_TS_EV_ETHREAD;
          my_tid = *init_msg->data.tid;
          set_envp(current_process(), own_tid_key, (OSADDRESS)&my_tid);
          if (ethr_thr_child_func__)
             ethr_thr_child_func__(init_msg->data.prep_func_res);
       }

       init_msg->data.result = result;

       send(&init_msg,sender(&init_msg));
    }

    /* pthread mutex api says we have to do this */
    /*erts_fprintf(stderr, "(%s / %d) curr_pid 0x%x / signal_fsem to 0x%x (fsem val %d)\n",
      __FUNCTION__, __LINE__, current_process(), current_process(), get_fsem(current_process()));*/
    signal_fsem(current_process());
    ETHR_ASSERT(get_fsem(current_process()) == 0);

    res = result == 0 ? (*thr_func)(arg) : NULL;

    thr_exit_cleanup(&my_tid, res);
}

/* internal exports */

int ethr_set_tse__(ethr_ts_event *tsep)
{
    return set_envp(current_process(),ethr_ts_event_key__, (OSADDRESS) tsep);
}

ethr_ts_event *ethr_get_tse__(void)
{
  return (ethr_ts_event *) get_envp(current_process(),ethr_ts_event_key__);
}

#if defined(ETHR_PPC_RUNTIME_CONF__)

static int
ppc_init__(void)
{
    int pid;


    ethr_runtime__.conf.have_lwsync = 0;

    return 0;
}

#endif

#if defined(ETHR_X86_RUNTIME_CONF__)

void
ethr_x86_cpuid__(int *eax, int *ebx, int *ecx, int *edx)
{
#if ETHR_SIZEOF_PTR == 4
    int have_cpuid;
    /*
     * If it is possible to toggle eflags bit 21,
     * we have the cpuid instruction.
     */
    __asm__ ("pushf\n\t"
             "popl %%eax\n\t"
             "movl %%eax, %%ecx\n\t"
             "xorl $0x200000, %%eax\n\t"
             "pushl %%eax\n\t"
             "popf\n\t"
             "pushf\n\t"
             "popl %%eax\n\t"
             "movl $0x0, %0\n\t"
             "xorl %%ecx, %%eax\n\t"
             "jz no_cpuid\n\t"
	     "movl $0x1, %0\n\t"
             "no_cpuid:\n\t"
             : "=r"(have_cpuid)
             :
             : "%eax", "%ecx", "cc");
    if (!have_cpuid) {
	*eax = *ebx = *ecx = *edx = 0;
	return;
    }
#endif
#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__
    /*
     * When position independet code is used in 32-bit mode, the B register
     * is used for storage of global offset table address, and we may not
     * use it as input or output in an asm. We need to save and restore the
     * B register explicitly (for some reason gcc doesn't provide this
     * service to us).
     */
    __asm__ ("pushl %%ebx\n\t"
	     "cpuid\n\t"
	     "movl %%ebx, %1\n\t"
	     "popl %%ebx\n\t"
	     : "=a"(*eax), "=r"(*ebx), "=c"(*ecx), "=d"(*edx)
	     : "0"(*eax)
	     : "cc");
#else
    __asm__ ("cpuid\n\t"
	     : "=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx)
	     : "0"(*eax)
	     : "cc");
#endif
}

#endif /* ETHR_X86_RUNTIME_CONF__ */

/*
 * --------------------------------------------------------------------------
 * Exported functions
 * --------------------------------------------------------------------------
 */

int
ethr_init(ethr_init_data *id)
{
    int res;

    if (!ethr_not_inited__)
	return EINVAL;


#if defined(ETHR_PPC_RUNTIME_CONF__)
    res = ppc_init__();
    if (res != 0)
	goto error;
#endif

    res = ethr_init_common__(id);
    if (res != 0)
	goto error;

    main_thr_tid.id = current_process();
    main_thr_tid.tsd_key_index = 0;

    set_envp(current_process(),own_tid_key,(OSADDRESS)&main_thr_tid);
        /*erts_fprintf(stderr, "(%s / %d) curr_pid 0x%x / signal_fsem to 0x%x (fsem_val %d)\n",
                __FUNCTION__, __LINE__, current_process(), current_process(), get_fsem(current_process()));*/
    signal_fsem(current_process());

    ETHR_ASSERT(&main_thr_tid == ETHR_GET_OWN_TID__);

    ose_create_ppdata("ProcName", &nameKey);

    ethr_not_inited__ = 0;

    return 0;
 error:
    ethr_not_inited__ = 1;
    return res;

}

int
ethr_late_init(ethr_late_init_data *id)
{
    int res = ethr_late_init_common__(id);
    if (res != 0)
	return res;
    ethr_not_completely_inited__ = 0;
    return res;
}

int
ethr_thr_create(ethr_tid *tid, void * (*func)(void *), void *arg,
		ethr_thr_opts *opts)
{
    int res;
    int use_stack_size = (opts && opts->suggested_stack_size >= 0
			  ? opts->suggested_stack_size
			  : 0x200 /* Use system default */);
    union SIGNAL *init_msg;
    SIGSELECT sigsel[] = {1,ETHREADWRAPDATASIG};
    void *prep_func_res;

#ifdef ETHR_MODIFIED_DEFAULT_STACK_SIZE
    if (use_stack_size < 0)
	use_stack_size = ETHR_MODIFIED_DEFAULT_STACK_SIZE;
#endif

#if ETHR_XCHK
    if (ethr_not_completely_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
    if (!tid || !func) {
	ETHR_ASSERT(0);
	return EINVAL;
    }
#endif

    if (use_stack_size >= 0) {
	size_t suggested_stack_size = (size_t) use_stack_size;
	size_t stack_size;
#ifdef ETHR_DEBUG
	suggested_stack_size /= 2; /* Make sure we got margin */
#endif
#ifdef ETHR_STACK_GUARD_SIZE
	/* The guard is at least on some platforms included in the stack size
	   passed when creating threads */
	suggested_stack_size += ETHR_B2KW(ETHR_STACK_GUARD_SIZE);
#endif

	if (suggested_stack_size < ethr_min_stack_size__)
	    stack_size = ETHR_KW2B(ethr_min_stack_size__);
	else if (suggested_stack_size > ethr_max_stack_size__)
	    stack_size = ETHR_KW2B(ethr_max_stack_size__);
	else
	    stack_size = ETHR_PAGE_ALIGN(ETHR_KW2B(suggested_stack_size));
	use_stack_size = stack_size;
    }

    init_msg = alloc(sizeof(ethr_thr_wrap_data__), ETHREADWRAPDATASIG);

    /* Call prepare func if it exist */
    if (ethr_thr_prepare_func__)
	init_msg->data.prep_func_res = ethr_thr_prepare_func__();
    else
	init_msg->data.prep_func_res = NULL;

    /*erts_fprintf(stderr, "creating process %s / stack %d\n", opts->name, use_stack_size);*/

#if 0
    ramlog_printf("[0x%x] process '%s', coreNo = %u\n",
                  current_process(), opts->name, opts->coreNo);
#endif
    tid->id = create_process(/*OS_PRI_PROC*/OS_BG_PROC, opts->name, thr_wrapper,
			     use_stack_size, /*opts->prio+5*/31, 0,
                             blockId(), NULL, 0, 0);

    if (ose_bind_process(tid->id, opts->coreNo)) {
       printf("[0x%x] Binding pid 0x%x (%s) to core no %u.\n",
              current_process(), tid->id, opts->name, opts->coreNo);
    }

    /*FIXME!!! Normally this shouldn't be used in shared mode. Still there is
     * a problem with stdin fd in fd_ processes which should be further
     * investigated */
    efs_clone(tid->id);

    tid->tsd_key_index = 0;
    tid->res = NULL;

    init_msg->data.tse      = ethr_get_ts_event();
    init_msg->data.thr_func = func;
    init_msg->data.arg      = arg;
    init_msg->data.tid      = tid;
    init_msg->data.name     = opts->name;

    send(&init_msg, tid->id);

    start(tid->id);
    init_msg = receive(sigsel);

    res = init_msg->data.result;
    prep_func_res = init_msg->data.prep_func_res;

    free_buf(&init_msg);
    /* Cleanup... */

    if (ethr_thr_parent_func__)
	ethr_thr_parent_func__(prep_func_res);

    return res;
}

int
ethr_thr_join(ethr_tid tid, void **res)
{
    SIGSELECT sigsel[] = {1,OS_ATTACH_SIG};
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
#endif

    if (tid.id == ETHR_INVALID_TID_ID)
      return EINVAL;

    attach(NULL,tid.id);
    receive(sigsel);

    if (res)
      *res = tid.res;

    return 0;
}

int
ethr_thr_detach(ethr_tid tid)
{
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
#endif
    return 0;
}

void
ethr_thr_exit(void *res)
{
    ethr_tid *tid;
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return;
    }
#endif
    tid = ETHR_GET_OWN_TID__;
    if (!tid) {
	ETHR_ASSERT(0);
	kill_proc(current_process());
    }
    thr_exit_cleanup(tid, res);
    /* Harakiri possible? */
    kill_proc(current_process());
}

ethr_tid
ethr_self(void)
{
    ethr_tid *tid;
#if ETHR_XCHK
    if (ethr_not_inited__) {
      ethr_tid dummy_tid = {ETHR_INVALID_TID_ID, 0, NULL};
	ETHR_ASSERT(0);
	return dummy_tid;
    }
#endif
    tid = ETHR_GET_OWN_TID__;
    if (!tid) {
	ethr_tid dummy_tid = {ETHR_INVALID_TID_ID, 0, NULL};
	return dummy_tid;
    }
    return *tid;
}

int
ethr_equal_tids(ethr_tid tid1, ethr_tid tid2)
{
    return tid1.id == tid2.id && tid1.id != ETHR_INVALID_TID_ID;
}


/*
 * Thread specific events
 */

ethr_ts_event *
ethr_get_ts_event(void)
{
    return ethr_get_ts_event__();
}

void
ethr_leave_ts_event(ethr_ts_event *tsep)
{
    ethr_leave_ts_event__(tsep);
}

/*
 * Thread specific data
 */

int
ethr_tsd_key_create(ethr_tsd_key *keyp)
{
    ethr_tid *tid = ETHR_GET_OWN_TID__;
    ethr_tsd_key key;

#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
    if (!keyp) {
	ETHR_ASSERT(0);
	return EINVAL;
    }
#endif
    if (tid->tsd_key_index > 999)
      return EAGAIN;

    /* ethread_tsd_key_YYYYYYYY_XXX\0 */
    key = malloc(sizeof(ethr_tsd_key)+sizeof(char)*(strlen("ethread_tsd_key_0xYYYYYYYY_XXX")+1));
    /* What do we do it tds_key_index happens to wrap? Slot search? */
    sprintf(key->key,"ethread_tsd_key_0x%x_%d",tid->id,tid->tsd_key_index++);
    key->id = current_process();

    *keyp = key;

    return 0;
}

int
ethr_tsd_key_delete(ethr_tsd_key key)
{
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
#endif
    free(key);
    return 0;
}

int
ethr_tsd_set(ethr_tsd_key key, void *value)
{
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
#endif
    return set_envp(current_process(), key->key, (OSADDRESS)value)?0:1;
}

void *
ethr_tsd_get(ethr_tsd_key key)
{
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return NULL;
    }
#endif
    return (void*)get_envp(current_process(),key->key);
}

/*
 * Signal functions
 */

#if ETHR_HAVE_ETHR_SIG_FUNCS

int ethr_sigmask(int how, const sigset_t *set, sigset_t *oset)
{
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
    if (!set && !oset) {
	ETHR_ASSERT(0);
	return EINVAL;
    }
#endif
  return pthread_sigmask(how, set, oset);
}

int ethr_sigwait(const sigset_t *set, int *sig)
{
#if ETHR_XCHK
    if (ethr_not_inited__) {
	ETHR_ASSERT(0);
	return EACCES;
    }
    if (!set || !sig) {
	ETHR_ASSERT(0);
	return EINVAL;
    }
#endif
    if (sigwait(set, sig) < 0)
	return errno;
    return 0;
}

#endif /* #if ETHR_HAVE_ETHR_SIG_FUNCS */

ETHR_IMPL_NORETURN__
ethr_abort__(void)
{
    abort();
}

const char *procName(void);
const char *
procName(void) {
   char **procName_p = (char**)ose_get_ppdata(nameKey);
   if (procName_p) {
      return *procName_p;
   }

   return NULL;
}