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8158 Want named threads API
9857 proc manpages should have LIBRARY section
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--- old/usr/src/lib/libc/inc/thr_uberdata.h
+++ new/usr/src/lib/libc/inc/thr_uberdata.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 */
25 25
26 26 /*
27 27 * Copyright 2016 Joyent, Inc.
28 28 * Copyright 2018 Nexenta Systems, Inc.
29 29 */
30 30
31 31 #ifndef _THR_UBERDATA_H
32 32 #define _THR_UBERDATA_H
33 33
34 34 #include <stdlib.h>
35 35 #include <unistd.h>
36 36 #include <sys/types.h>
37 37 #include <fcntl.h>
38 38 #include <string.h>
39 39 #include <signal.h>
40 40 #include <ucontext.h>
41 41 #include <thread.h>
42 42 #include <pthread.h>
43 43 #include <atomic.h>
44 44 #include <link.h>
45 45 #include <sys/resource.h>
46 46 #include <sys/lwp.h>
47 47 #include <errno.h>
48 48 #include <sys/asm_linkage.h>
49 49 #include <sys/regset.h>
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50 50 #include <sys/fcntl.h>
51 51 #include <sys/mman.h>
52 52 #include <synch.h>
53 53 #include <door.h>
54 54 #include <limits.h>
55 55 #include <sys/synch32.h>
56 56 #include <schedctl.h>
57 57 #include <sys/priocntl.h>
58 58 #include <thread_db.h>
59 59 #include <setjmp.h>
60 +#include <sys/thread.h>
60 61 #include "libc_int.h"
61 62 #include "tdb_agent.h"
62 63 #include "thr_debug.h"
63 64
64 65 /*
65 66 * This is an implementation-specific include file for threading support.
66 67 * It is not to be seen by the clients of the library.
67 68 *
68 69 * This file also describes uberdata in libc.
69 70 *
70 71 * The term "uberdata" refers to data that is unique and visible across
71 72 * all link maps. The name is meant to imply that such data is truly
72 73 * global, not just locally global to a particular link map.
73 74 *
74 75 * See the Linker and Libraries Guide for a full description of alternate
75 76 * link maps and how they are set up and used.
76 77 *
77 78 * Alternate link maps implement multiple global namespaces within a single
78 79 * process. There may be multiple instances of identical dynamic libraries
79 80 * loaded in a process's address space at the same time, each on a different
80 81 * link map (as determined by the dynamic linker), each with its own set of
81 82 * global variables. Which particular instance of a global variable is seen
82 83 * by a thread running in the process is determined by the link map on which
83 84 * the thread happens to be executing at the time.
84 85 *
85 86 * However, there are aspects of a process that are unique across all
86 87 * link maps, in particular the structures used to implement threads
87 88 * of control (in Sparc terminology, there is only one %g7 regardless
88 89 * of the link map on which the thread is executing).
89 90 *
90 91 * All uberdata is referenced from a base pointer in the thread's ulwp_t
91 92 * structure (which is also uberdata). All allocations and deallocations
92 93 * of uberdata are made via the uberdata-aware lmalloc() and lfree()
93 94 * interfaces (malloc() and free() are simply locally-global).
94 95 */
95 96
96 97 /*
97 98 * Special libc-private access to errno.
98 99 * We do this so that references to errno do not invoke the dynamic linker.
99 100 */
100 101 #undef errno
101 102 #define errno (*curthread->ul_errnop)
102 103
103 104 /*
104 105 * See <sys/synch32.h> for the reasons for these values
105 106 * and why they are different for sparc and intel.
106 107 */
107 108 #if defined(__sparc)
108 109
109 110 /* lock.lock64.pad[x] 4 5 6 7 */
110 111 #define LOCKMASK 0xff000000
111 112 #define WAITERMASK 0x000000ff
112 113 #define SPINNERMASK 0x00ff0000
113 114 #define SPINNERSHIFT 16
114 115 #define WAITER 0x00000001
115 116 #define LOCKSET 0xff
116 117 #define LOCKCLEAR 0
117 118
118 119 #define PIDSHIFT 32
119 120 #define LOCKMASK64 0xffffffffff000000ULL
120 121 #define LOCKBYTE64 0x00000000ff000000ULL
121 122 #define WAITERMASK64 0x00000000000000ffULL
122 123 #define SPINNERMASK64 0x0000000000ff0000ULL
123 124
124 125 #elif defined(__x86)
125 126
126 127 /* lock.lock64.pad[x] 7 6 5 4 */
127 128 #define LOCKMASK 0xff000000
128 129 #define WAITERMASK 0x00ff0000
129 130 #define SPINNERMASK 0x0000ff00
130 131 #define SPINNERSHIFT 8
131 132 #define WAITER 0x00010000
132 133 #define LOCKSET 0x01
133 134 #define LOCKCLEAR 0
134 135
135 136 #define PIDSHIFT 0
136 137 #define LOCKMASK64 0xff000000ffffffffULL
137 138 #define LOCKBYTE64 0x0100000000000000ULL
138 139 #define WAITERMASK64 0x00ff000000000000ULL
139 140 #define SPINNERMASK64 0x0000ff0000000000ULL
140 141
141 142 #else
142 143 #error "neither __sparc nor __x86 is defined"
143 144 #endif
144 145
145 146 /*
146 147 * Fetch the owner of a USYNC_THREAD mutex.
147 148 * Don't use this with process-shared mutexes;
148 149 * the owing thread may be in a different process.
149 150 */
150 151 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner)
151 152
152 153 /*
153 154 * Test if a thread owns a process-private (USYNC_THREAD) mutex.
154 155 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex.
155 156 * The 'mp' argument must not have side-effects since it is evaluated twice.
156 157 */
157 158 #define MUTEX_OWNED(mp, thrp) \
158 159 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp)
159 160
160 161
161 162 /*
162 163 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the
163 164 * collection of lock statistics by a debugger or other collecting tool.
164 165 *
165 166 * uberflags.uf_thread_error_detection is set by an environment variable:
166 167 * _THREAD_ERROR_DETECTION
167 168 * 0 == no detection of locking primitive errors.
168 169 * 1 == detect errors and issue a warning message.
169 170 * 2 == detect errors, issue a warning message, and dump core.
170 171 *
171 172 * We bundle these together in uberflags.uf_trs_ted to make a test of either
172 173 * being non-zero a single memory reference (for speed of mutex_lock(), etc).
173 174 *
174 175 * uberflags.uf_mt is set non-zero when the first thread (in addition
175 176 * to the main thread) is created.
176 177 *
177 178 * We bundle all these flags together in uberflags.uf_all to make a test
178 179 * of any being non-zero a single memory reference (again, for speed).
179 180 */
180 181 typedef union {
181 182 int uf_all; /* combined all flags */
182 183 struct {
183 184 short h_pad;
184 185 short h_trs_ted; /* combined reg sync & error detect */
185 186 } uf_h;
186 187 struct {
187 188 char x_mt;
188 189 char x_pad;
189 190 char x_tdb_register_sync;
190 191 char x_thread_error_detection;
191 192 } uf_x;
192 193 } uberflags_t;
193 194
194 195 #define uf_mt uf_x.x_mt
195 196 #define uf_tdb_register_sync uf_x.x_tdb_register_sync
196 197 #define uf_thread_error_detection uf_x.x_thread_error_detection
197 198 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */
198 199
199 200 /*
200 201 * NOTE WELL:
201 202 * To enable further optimization, the "ul_schedctl_called" member
202 203 * of the ulwp_t structure (below) serves double-duty:
203 204 * 1. If NULL, it means that the thread must call __schedctl()
204 205 * to set up its schedctl mappings before acquiring a mutex.
205 206 * This is required by the implementation of adaptive mutex locking.
206 207 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of
207 208 * uberflags can be made without additional memory references.
208 209 * This allows the common case of _mutex_lock() and _mutex_unlock() for
209 210 * USYNC_THREAD mutexes with no error detection and no lock statistics
210 211 * to be optimized for speed.
211 212 */
212 213
213 214 /* double the default stack size for 64-bit processes */
214 215 #ifdef _LP64
215 216 #define MINSTACK (8 * 1024)
216 217 #define DEFAULTSTACK (2 * 1024 * 1024)
217 218 #else
218 219 #define MINSTACK (4 * 1024)
219 220 #define DEFAULTSTACK (1024 * 1024)
220 221 #endif
221 222
222 223 #define MUTEX_TRY 0
223 224 #define MUTEX_LOCK 1
224 225 #define MUTEX_NOCEIL 0x40
225 226
226 227 #if defined(__x86)
227 228
228 229 typedef struct { /* structure returned by fnstenv */
229 230 int fctrl; /* control word */
230 231 int fstat; /* status word (flags, etc) */
231 232 int ftag; /* tag of which regs busy */
232 233 int misc[4]; /* other stuff, 28 bytes total */
233 234 } fpuenv_t;
234 235
235 236 #ifdef _SYSCALL32
236 237 typedef fpuenv_t fpuenv32_t;
237 238 #endif /* _SYSCALL32 */
238 239
239 240 #elif defined(__sparc)
240 241
241 242 typedef struct { /* fp state structure */
242 243 greg_t fsr;
243 244 greg_t fpu_en;
244 245 } fpuenv_t;
245 246
246 247 #ifdef _SYSCALL32
247 248 typedef struct {
248 249 greg32_t fsr;
249 250 greg32_t fpu_en;
250 251 } fpuenv32_t;
251 252 #endif /* _SYSCALL32 */
252 253
253 254 #endif /* __x86 */
254 255
255 256 #if defined(__x86)
256 257 extern void ht_pause(void); /* "pause" instruction */
257 258 #define SMT_PAUSE() ht_pause()
258 259 #elif defined(SMT_PAUSE_FUNCTION)
259 260 extern void SMT_PAUSE_FUNCTION(void);
260 261 #define SMT_PAUSE() SMT_PAUSE_FUNCTION()
261 262 #else
262 263 #define SMT_PAUSE() smt_pause()
263 264 #endif /* __x86 */
264 265
265 266 /*
266 267 * Cleanup handler related data.
267 268 * This structure is exported as _cleanup_t in pthread.h.
268 269 * pthread.h exports only the size of this structure, so check
269 270 * _cleanup_t in pthread.h before making any change here.
270 271 */
271 272 typedef struct __cleanup {
272 273 struct __cleanup *next; /* pointer to next handler */
273 274 caddr_t fp; /* current frame pointer */
274 275 void (*func)(void *); /* cleanup handler address */
275 276 void *arg; /* handler's argument */
276 277 } __cleanup_t;
277 278
278 279 /*
279 280 * Thread-Specific Data (TSD)
280 281 * TSD_NFAST includes the invalid key zero, so there
281 282 * are really only (TSD_NFAST - 1) fast key slots.
282 283 */
283 284 typedef void (*PFrV)(void *);
284 285 #define TSD_UNALLOCATED ((PFrV)1)
285 286 #define TSD_NFAST 9
286 287
287 288 /*
288 289 * The tsd union is designed to burn a little memory (9 words) to make
289 290 * lookups blindingly fast. Note that tsd_nalloc could be placed at the
290 291 * end of the pad region to increase the likelihood that it falls on the
291 292 * same cache line as the data.
292 293 */
293 294 typedef union tsd {
294 295 uint_t tsd_nalloc; /* Amount of allocated storage */
295 296 void *tsd_pad[TSD_NFAST];
296 297 void *tsd_data[1];
297 298 } tsd_t;
298 299
299 300 typedef struct {
300 301 mutex_t tsdm_lock; /* Lock protecting the data */
301 302 uint_t tsdm_nkeys; /* Number of allocated keys */
302 303 uint_t tsdm_nused; /* Number of used keys */
303 304 PFrV *tsdm_destro; /* Per-key destructors */
304 305 char tsdm_pad[64 - /* pad to 64 bytes */
305 306 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))];
306 307 } tsd_metadata_t;
307 308
308 309 #ifdef _SYSCALL32
309 310 typedef union tsd32 {
310 311 uint_t tsd_nalloc; /* Amount of allocated storage */
311 312 caddr32_t tsd_pad[TSD_NFAST];
312 313 caddr32_t tsd_data[1];
313 314 } tsd32_t;
314 315
315 316 typedef struct {
316 317 mutex_t tsdm_lock; /* Lock protecting the data */
317 318 uint_t tsdm_nkeys; /* Number of allocated keys */
318 319 uint_t tsdm_nused; /* Number of used keys */
319 320 caddr32_t tsdm_destro; /* Per-key destructors */
320 321 char tsdm_pad[64 - /* pad to 64 bytes */
321 322 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))];
322 323 } tsd_metadata32_t;
323 324 #endif /* _SYSCALL32 */
324 325
325 326
326 327 /*
327 328 * Thread-Local Storage (TLS)
328 329 */
329 330 typedef struct {
330 331 void *tls_data;
331 332 size_t tls_size;
332 333 } tls_t;
333 334
334 335 typedef struct {
335 336 mutex_t tls_lock; /* Lock protecting the data */
336 337 tls_t tls_modinfo; /* Root of all TLS_modinfo data */
337 338 tls_t static_tls; /* Template for static TLS */
338 339 char tls_pad[64 - /* pad to 64 bytes */
339 340 (sizeof (mutex_t) + 2 * sizeof (tls_t))];
340 341 } tls_metadata_t;
341 342
342 343 #ifdef _SYSCALL32
343 344 typedef struct {
344 345 caddr32_t tls_data;
345 346 size32_t tls_size;
346 347 } tls32_t;
347 348
348 349 typedef struct {
349 350 mutex_t tls_lock; /* Lock protecting the data */
350 351 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */
351 352 tls32_t static_tls; /* Template for static TLS */
352 353 char tls_pad[64 - /* pad to 64 bytes */
353 354 (sizeof (mutex_t) + 2 * sizeof (tls32_t))];
354 355 } tls_metadata32_t;
355 356 #endif /* _SYSCALL32 */
356 357
357 358
358 359 /*
359 360 * Sleep queue root for USYNC_THREAD condvars and mutexes.
360 361 * There is a default queue root for each queue head (see below).
361 362 * Also, each ulwp_t contains a queue root that can be used
362 363 * when the thread is enqueued on the queue, if necessary
363 364 * (when more than one wchan hashes to the same queue head).
364 365 */
365 366 typedef struct queue_root {
366 367 struct queue_root *qr_next;
367 368 struct queue_root *qr_prev;
368 369 struct ulwp *qr_head;
369 370 struct ulwp *qr_tail;
370 371 void *qr_wchan;
371 372 uint32_t qr_rtcount;
372 373 uint32_t qr_qlen;
373 374 uint32_t qr_qmax;
374 375 } queue_root_t;
375 376
376 377 #ifdef _SYSCALL32
377 378 typedef struct queue_root32 {
378 379 caddr32_t qr_next;
379 380 caddr32_t qr_prev;
380 381 caddr32_t qr_head;
381 382 caddr32_t qr_tail;
382 383 caddr32_t qr_wchan;
383 384 uint32_t qr_rtcount;
384 385 uint32_t qr_qlen;
385 386 uint32_t qr_qmax;
386 387 } queue_root32_t;
387 388 #endif
388 389
389 390 /*
390 391 * Sleep queue heads for USYNC_THREAD condvars and mutexes.
391 392 * The size and alignment is 128 bytes to reduce cache conflicts.
392 393 * Each queue head points to a list of queue roots, defined above.
393 394 * Each queue head contains a default queue root for use when only one
394 395 * is needed. It is always at the tail of the queue root hash chain.
395 396 */
396 397 typedef union {
397 398 uint64_t qh_64[16];
398 399 struct {
399 400 mutex_t q_lock;
400 401 uint8_t q_qcnt;
401 402 uint8_t q_type; /* MX or CV */
402 403 uint8_t q_pad1[2];
403 404 uint32_t q_lockcount;
404 405 uint32_t q_qlen;
405 406 uint32_t q_qmax;
406 407 void *q_wchan; /* valid only while locked */
407 408 struct queue_root *q_root; /* valid only while locked */
408 409 struct queue_root *q_hlist;
409 410 #if !defined(_LP64)
410 411 caddr_t q_pad2[3];
411 412 #endif
412 413 queue_root_t q_def_root;
413 414 uint32_t q_hlen;
414 415 uint32_t q_hmax;
415 416 } qh_qh;
416 417 } queue_head_t;
417 418
418 419 #define qh_lock qh_qh.q_lock
419 420 #define qh_qcnt qh_qh.q_qcnt
420 421 #define qh_type qh_qh.q_type
421 422 #if defined(THREAD_DEBUG)
422 423 #define qh_lockcount qh_qh.q_lockcount
423 424 #define qh_qlen qh_qh.q_qlen
424 425 #define qh_qmax qh_qh.q_qmax
425 426 #endif
426 427 #define qh_wchan qh_qh.q_wchan
427 428 #define qh_root qh_qh.q_root
428 429 #define qh_hlist qh_qh.q_hlist
429 430 #define qh_def_root qh_qh.q_def_root
430 431 #define qh_hlen qh_qh.q_hlen
431 432 #define qh_hmax qh_qh.q_hmax
432 433
433 434 /* queue types passed to queue_lock() */
434 435 #define MX 0
435 436 #define CV 1
436 437 #define QHASHSHIFT 9 /* number of hashing bits */
437 438 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */
438 439 #define QUEUE_HASH(wchan, type) ((uint_t) \
439 440 ((((uintptr_t)(wchan) >> 3) \
440 441 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \
441 442 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE))
442 443
443 444 extern queue_head_t *queue_lock(void *, int);
444 445 extern void queue_unlock(queue_head_t *);
445 446 extern void enqueue(queue_head_t *, struct ulwp *, int);
446 447 extern struct ulwp *dequeue(queue_head_t *, int *);
447 448 extern struct ulwp **queue_slot(queue_head_t *, struct ulwp **, int *);
448 449 extern struct ulwp *queue_waiter(queue_head_t *);
449 450 extern int dequeue_self(queue_head_t *);
450 451 extern void queue_unlink(queue_head_t *,
451 452 struct ulwp **, struct ulwp *);
452 453 extern void unsleep_self(void);
453 454 extern void spin_lock_set(mutex_t *);
454 455 extern void spin_lock_clear(mutex_t *);
455 456
456 457 /*
457 458 * Scheduling class information structure.
458 459 */
459 460 typedef struct {
460 461 short pcc_state;
461 462 short pcc_policy;
462 463 pri_t pcc_primin;
463 464 pri_t pcc_primax;
464 465 pcinfo_t pcc_info;
465 466 } pcclass_t;
466 467
467 468 /*
468 469 * Memory block for chain of owned ceiling mutexes.
469 470 */
470 471 typedef struct mxchain {
471 472 struct mxchain *mxchain_next;
472 473 mutex_t *mxchain_mx;
473 474 } mxchain_t;
474 475
475 476 /*
476 477 * Pointer to an rwlock that is held for reading.
477 478 * Used in rw_rdlock() to allow a thread that already holds a read
478 479 * lock to acquire another read lock on the same rwlock even if
479 480 * there are writers waiting. This to avoid deadlock when acquiring
480 481 * a read lock more than once in the presence of pending writers.
481 482 * POSIX mandates this behavior.
482 483 */
483 484 typedef struct {
484 485 void *rd_rwlock; /* the rwlock held for reading */
485 486 size_t rd_count; /* count of read locks applied */
486 487 } readlock_t;
487 488
488 489 #ifdef _SYSCALL32
489 490 typedef struct {
490 491 caddr32_t rd_rwlock;
491 492 size32_t rd_count;
492 493 } readlock32_t;
493 494 #endif /* _SYSCALL32 */
494 495
495 496 /*
496 497 * As part of per-thread caching libumem (ptcumem), we add a small amount to the
497 498 * thread's uberdata to facilitate it. The tm_roots are the roots of linked
498 499 * lists which is used by libumem to chain together allocations. tm_size is used
499 500 * to track the total amount of data stored across those linked lists. For more
500 501 * information, see libumem's big theory statement.
501 502 */
502 503 #define NTMEMBASE 16
503 504
504 505 typedef struct {
505 506 size_t tm_size;
506 507 void *tm_roots[NTMEMBASE];
507 508 } tumem_t;
508 509
509 510 #ifdef _SYSCALL32
510 511 typedef struct {
511 512 uint32_t tm_size;
512 513 caddr32_t tm_roots[NTMEMBASE];
513 514 } tumem32_t;
514 515 #endif
515 516
516 517 typedef void (*tmem_func_t)(void *, int);
517 518
518 519 /*
519 520 * Maximum number of read locks allowed for one thread on one rwlock.
520 521 * This could be as large as INT_MAX, but the SUSV3 test suite would
521 522 * take an inordinately long time to complete. This is big enough.
522 523 */
523 524 #define READ_LOCK_MAX 100000
524 525
525 526 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */
526 527 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */
527 528
528 529 /*
529 530 * Round up an integral value to a multiple of 64
530 531 */
531 532 #define roundup64(x) (-(-(x) & -64))
532 533
533 534 /*
534 535 * NOTE: Whatever changes are made to ulwp_t must be
535 536 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c
536 537 *
537 538 * NOTE: ul_self *must* be the first member of ulwp_t on x86
538 539 * Low-level x86 code relies on this.
539 540 */
540 541 typedef struct ulwp {
541 542 /*
542 543 * These members always need to come first on sparc.
543 544 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary.
544 545 */
545 546 #if defined(__sparc)
546 547 uint32_t ul_dinstr; /* scratch space for dtrace */
547 548 uint32_t ul_padsparc0[15];
548 549 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */
549 550 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */
550 551 uint32_t ul_dftret; /* dtrace: return probe fasttrap */
551 552 uint32_t ul_dreturn; /* dtrace: return %o0 */
552 553 #endif
553 554 struct ulwp *ul_self; /* pointer to self */
554 555 #if defined(__i386)
555 556 uint8_t ul_dinstr[40]; /* scratch space for dtrace */
556 557 #elif defined(__amd64)
557 558 uint8_t ul_dinstr[56]; /* scratch space for dtrace */
558 559 #endif
559 560 struct uberdata *ul_uberdata; /* uber (super-global) data */
560 561 tls_t ul_tls; /* dynamic thread-local storage base */
561 562 struct ulwp *ul_forw; /* forw, back all_lwps list, */
562 563 struct ulwp *ul_back; /* protected by link_lock */
563 564 struct ulwp *ul_next; /* list to keep track of stacks */
564 565 struct ulwp *ul_hash; /* hash chain linked list */
565 566 void *ul_rval; /* return value from thr_exit() */
566 567 caddr_t ul_stk; /* mapping base of the stack */
567 568 size_t ul_mapsiz; /* mapping size of the stack */
568 569 size_t ul_guardsize; /* normally _lpagesize */
569 570 uintptr_t ul_stktop; /* broken thr_stksegment() interface */
570 571 size_t ul_stksiz; /* broken thr_stksegment() interface */
571 572 stack_t ul_ustack; /* current stack boundaries */
572 573 int ul_ix; /* hash index */
573 574 lwpid_t ul_lwpid; /* thread id, aka the lwp id */
574 575 pri_t ul_pri; /* scheduling priority */
575 576 pri_t ul_epri; /* real-time ceiling priority */
576 577 char ul_policy; /* scheduling policy */
577 578 char ul_cid; /* scheduling class id */
578 579 union {
579 580 struct {
580 581 char cursig; /* deferred signal number */
581 582 char pleasestop; /* lwp requested to stop itself */
582 583 } s;
583 584 short curplease; /* for testing both at once */
584 585 } ul_cp;
585 586 char ul_stop; /* reason for stopping */
586 587 char ul_signalled; /* this lwp was cond_signal()d */
587 588 char ul_dead; /* this lwp has called thr_exit */
588 589 char ul_unwind; /* posix: unwind C++ stack */
589 590 char ul_detached; /* THR_DETACHED at thread_create() */
590 591 /* or pthread_detach() was called */
591 592 char ul_writer; /* sleeping in rw_wrlock() */
592 593 char ul_stopping; /* set by curthread: stopping self */
593 594 char ul_cancel_prologue; /* for _cancel_prologue() */
594 595 short ul_preempt; /* no_preempt()/preempt() */
595 596 short ul_savpreempt; /* pre-existing preempt value */
596 597 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */
597 598 char ul_main; /* thread is the main thread */
598 599 char ul_fork; /* thread is performing a fork */
599 600 char ul_primarymap; /* primary link-map is initialized */
600 601 /* per-thread copies of the corresponding global variables */
601 602 uint8_t ul_max_spinners; /* thread_max_spinners */
602 603 char ul_door_noreserve; /* thread_door_noreserve */
603 604 char ul_queue_fifo; /* thread_queue_fifo */
604 605 char ul_cond_wait_defer; /* thread_cond_wait_defer */
605 606 char ul_error_detection; /* thread_error_detection */
606 607 char ul_async_safe; /* thread_async_safe */
607 608 char ul_rt; /* found on an RT queue */
608 609 char ul_rtqueued; /* was RT when queued */
609 610 char ul_misaligned; /* thread_locks_misaligned */
610 611 char ul_pad[3];
611 612 int ul_adaptive_spin; /* thread_adaptive_spin */
612 613 int ul_queue_spin; /* thread_queue_spin */
613 614 volatile int ul_critical; /* non-zero == in a critical region */
614 615 int ul_sigdefer; /* non-zero == defer signals */
615 616 int ul_vfork; /* thread is the child of vfork() */
616 617 int ul_cancelable; /* _cancelon()/_canceloff() */
617 618 char ul_cancel_pending; /* pthread_cancel() was called */
618 619 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */
619 620 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */
620 621 char ul_save_async; /* saved copy of ul_cancel_async */
621 622 char ul_mutator; /* lwp is a mutator (java interface) */
622 623 char ul_created; /* created suspended */
623 624 char ul_replace; /* replacement; must be free()d */
624 625 uchar_t ul_nocancel; /* cancellation can't happen */
625 626 int ul_errno; /* per-thread errno */
626 627 int *ul_errnop; /* pointer to errno or self->ul_errno */
627 628 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */
628 629 uberflags_t *ul_schedctl_called; /* ul_schedctl is set up */
629 630 volatile sc_shared_t *ul_schedctl; /* schedctl data */
630 631 int ul_bindflags; /* bind_guard() interface to ld.so.1 */
631 632 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */
632 633 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */
633 634 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */
634 635 td_evbuf_t ul_td_evbuf; /* event buffer */
635 636 char ul_td_events_enable; /* event mechanism enabled */
636 637 char ul_sync_obj_reg; /* tdb_sync_obj_register() */
637 638 char ul_qtype; /* MX or CV */
638 639 char ul_cv_wake; /* != 0: just wake up, don't requeue */
639 640 int ul_rtld; /* thread is running inside ld.so.1 */
640 641 int ul_usropts; /* flags given to thr_create() */
641 642 void *(*ul_startpc)(void *); /* start func (thr_create()) */
642 643 void *ul_startarg; /* argument for start function */
643 644 void *ul_wchan; /* synch object when sleeping */
644 645 struct ulwp *ul_link; /* sleep queue link */
645 646 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */
646 647 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */
647 648 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */
648 649 int ul_save_state; /* bind_guard() interface to ld.so.1 */
649 650 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */
650 651 /* 0 means there is but a single entry */
651 652 union { /* single entry or pointer to array */
652 653 readlock_t single;
653 654 readlock_t *array;
654 655 } ul_readlock;
655 656 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */
656 657 /* 0 means there is but a single entry */
657 658 union { /* single entry or pointer to array */
658 659 mutex_t *single;
659 660 mutex_t **array;
660 661 } ul_heldlocks;
661 662 /* PROBE_SUPPORT begin */
662 663 void *ul_tpdp;
663 664 /* PROBE_SUPPORT end */
664 665 ucontext_t *ul_siglink; /* pointer to previous context */
665 666 uint_t ul_spin_lock_spin; /* spin lock statistics */
666 667 uint_t ul_spin_lock_spin2;
667 668 uint_t ul_spin_lock_sleep;
668 669 uint_t ul_spin_lock_wakeup;
669 670 queue_root_t ul_queue_root; /* root of a sleep queue */
670 671 id_t ul_rtclassid; /* real-time class id */
671 672 uint_t ul_pilocks; /* count of PI locks held */
672 673 /* the following members *must* be last in the structure */
673 674 /* they are discarded when ulwp is replaced on thr_exit() */
674 675 sigset_t ul_sigmask; /* thread's current signal mask */
675 676 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */
676 677 siginfo_t ul_siginfo; /* deferred siginfo */
677 678 mutex_t ul_spinlock; /* used when suspending/continuing */
678 679 fpuenv_t ul_fpuenv; /* floating point state */
679 680 uintptr_t ul_sp; /* stack pointer when blocked */
680 681 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */
681 682 #if defined(sparc)
682 683 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */
683 684 #endif
684 685 tumem_t ul_tmem; /* used only by umem */
685 686 uint_t ul_ptinherit; /* pthreads sched inherit value */
686 687 char ul_ntoabuf[18]; /* thread-specific inet_ntoa buffer */
687 688 } ulwp_t;
688 689
689 690 #define ul_cursig ul_cp.s.cursig /* deferred signal number */
690 691 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */
691 692 #define ul_curplease ul_cp.curplease /* for testing both at once */
692 693
693 694 /*
694 695 * This is the size of a replacement ulwp, retained only for the benefit
695 696 * of thr_join(). The trailing members are unneeded for this purpose.
696 697 */
697 698 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask)
698 699
699 700 /*
700 701 * Definitions for static initialization of signal sets,
701 702 * plus some sneaky optimizations in various places.
702 703 */
703 704
704 705 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1)))
705 706
706 707 #if (MAXSIG > (2 * 32) && MAXSIG <= (3 * 32))
707 708 #define FILLSET0 0xffffffffu
708 709 #define FILLSET1 0xffffffffu
709 710 #define FILLSET2 ((1u << (MAXSIG - 64)) - 1)
710 711 #define FILLSET3 0
711 712 #else
712 713 #error "fix me: MAXSIG out of bounds"
713 714 #endif
714 715
715 716 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP))
716 717 #define CANTMASK1 0
717 718 #define CANTMASK2 0
718 719 #define CANTMASK3 0
719 720
720 721 #define MASKSET0 (FILLSET0 & ~CANTMASK0)
721 722 #define MASKSET1 (FILLSET1 & ~CANTMASK1)
722 723 #define MASKSET2 (FILLSET2 & ~CANTMASK2)
723 724 #define MASKSET3 (FILLSET3 & ~CANTMASK3)
724 725
725 726 extern const sigset_t maskset; /* set of all maskable signals */
726 727
727 728 extern int thread_adaptive_spin;
728 729 extern uint_t thread_max_spinners;
729 730 extern int thread_queue_spin;
730 731 extern int thread_queue_fifo;
731 732 extern int thread_queue_dump;
732 733 extern int thread_cond_wait_defer;
733 734 extern int thread_async_safe;
734 735 extern int thread_queue_verify;
735 736
736 737 /*
737 738 * pthread_atfork() related data, used to store atfork handlers.
738 739 */
739 740 typedef struct atfork {
740 741 struct atfork *forw; /* forward pointer */
741 742 struct atfork *back; /* backward pointer */
742 743 void (*prepare)(void); /* pre-fork handler */
743 744 void (*parent)(void); /* post-fork parent handler */
744 745 void (*child)(void); /* post-fork child handler */
745 746 } atfork_t;
746 747
747 748 /*
748 749 * Element in the table and in the list of registered process
749 750 * robust locks. We keep track of these to make sure that we
750 751 * only call ___lwp_mutex_register() once for each such lock
751 752 * after it is first mapped in (or newly mapped in).
752 753 */
753 754 typedef struct robust {
754 755 struct robust *robust_next; /* hash table list */
755 756 struct robust *robust_list; /* global list */
756 757 mutex_t *robust_lock;
757 758 } robust_t;
758 759
759 760 /*
760 761 * Invalid address, used to mark an unused element in the hash table.
761 762 */
762 763 #define INVALID_ADDR ((void *)(uintptr_t)(-1L))
763 764
764 765 /*
765 766 * Parameters of the lock registration hash table.
766 767 */
767 768 #define LOCKSHIFT 15 /* number of hashing bits */
768 769 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<15 == 32K) */
769 770 #define LOCK_HASH(addr) (uint_t) \
770 771 ((((uintptr_t)(addr) >> 3) \
771 772 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \
772 773 & (LOCKHASHSZ - 1))
773 774
774 775 /*
775 776 * Make our hot locks reside on private cache lines (64 bytes).
776 777 */
777 778 typedef struct {
778 779 mutex_t pad_lock;
779 780 char pad_pad[64 - sizeof (mutex_t)];
780 781 } pad_lock_t;
781 782
782 783 /*
783 784 * Make our semi-hot locks reside on semi-private cache lines (32 bytes).
784 785 */
785 786 typedef struct {
786 787 mutex_t pad_lock;
787 788 char pad_pad[32 - sizeof (mutex_t)];
788 789 } pad32_lock_t;
789 790
790 791 /*
791 792 * The threads hash table is used for fast lookup and locking of an active
792 793 * thread structure (ulwp_t) given a thread-id. It is an N-element array of
793 794 * thr_hash_table_t structures, where N == 1 before the main thread creates
794 795 * the first additional thread and N == 1024 afterwards. Each element of the
795 796 * table is 64 bytes in size and alignment to reduce cache conflicts.
796 797 */
797 798 typedef struct {
798 799 mutex_t hash_lock; /* lock per bucket */
799 800 cond_t hash_cond; /* convar per bucket */
800 801 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */
801 802 char hash_pad[64 - /* pad out to 64 bytes */
802 803 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))];
803 804 } thr_hash_table_t;
804 805
805 806 #ifdef _SYSCALL32
806 807 typedef struct {
807 808 mutex_t hash_lock;
808 809 cond_t hash_cond;
809 810 caddr32_t hash_bucket;
810 811 char hash_pad[64 -
811 812 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))];
812 813 } thr_hash_table32_t;
813 814 #endif /* _SYSCALL32 */
814 815
815 816
816 817 /*
817 818 * siguaction members have 128-byte size and 64-byte alignment.
818 819 * We know that sizeof (struct sigaction) is 32 bytes for both
819 820 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes.
820 821 */
821 822 typedef struct {
822 823 rwlock_t sig_lock;
823 824 struct sigaction sig_uaction;
824 825 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)];
825 826 } siguaction_t;
826 827
827 828 #ifdef _SYSCALL32
828 829 typedef struct {
829 830 rwlock_t sig_lock;
830 831 struct sigaction32 sig_uaction;
831 832 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)];
832 833 } siguaction32_t;
833 834 #endif /* _SYSCALL32 */
834 835
835 836
836 837 /*
837 838 * Bucket structures, used by lmalloc()/lfree().
838 839 * See port/threads/alloc.c for details.
839 840 * A bucket's size and alignment is 64 bytes.
840 841 */
841 842 typedef struct {
842 843 mutex_t bucket_lock; /* protects the free list allocations */
843 844 void *free_list; /* LIFO list of blocks to allocate/free */
844 845 size_t chunks; /* number of 64K blocks mmap()ed last time */
845 846 char pad64[64 - /* pad out to 64 bytes */
846 847 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))];
847 848 } bucket_t;
848 849
849 850 #ifdef _SYSCALL32
850 851 typedef struct {
851 852 mutex_t bucket_lock;
852 853 caddr32_t free_list;
853 854 size32_t chunks;
854 855 char pad64[64 - /* pad out to 64 bytes */
855 856 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))];
856 857 } bucket32_t;
857 858 #endif /* _SYSCALL32 */
858 859
859 860 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */
860 861
861 862
862 863 /*
863 864 * atexit() data structures.
864 865 * See port/gen/atexit.c for details.
865 866 */
866 867 typedef void (*_exithdlr_func_t) (void*);
867 868
868 869 typedef struct _exthdlr {
869 870 struct _exthdlr *next; /* next in handler list */
870 871 _exithdlr_func_t hdlr; /* handler itself */
871 872 void *arg; /* argument to handler */
872 873 void *dso; /* DSO associated with handler */
873 874 } _exthdlr_t;
874 875
875 876 typedef struct {
876 877 mutex_t exitfns_lock;
877 878 _exthdlr_t *head;
878 879 /*
879 880 * exit_frame_monitor is part of a private contract between libc and
880 881 * the Sun C++ runtime.
881 882 *
882 883 * It should be NULL until exit() is called, and thereafter hold the
883 884 * frame pointer of the function implementing our exit processing.
884 885 */
885 886 void *exit_frame_monitor;
886 887 char exit_pad[64 - /* pad out to 64 bytes */
887 888 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))];
888 889 } atexit_root_t;
889 890
890 891 #ifdef _SYSCALL32
891 892 typedef struct {
892 893 mutex_t exitfns_lock;
893 894 caddr32_t head;
894 895 caddr32_t exit_frame_monitor;
895 896 char exit_pad[64 - /* pad out to 64 bytes */
896 897 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))];
897 898 } atexit_root32_t;
898 899 #endif /* _SYSCALL32 */
899 900
900 901 /*
901 902 * at_quick_exit() and quick_exit() data structures. The ISO/IEC C11 odd
902 903 * siblings of atexit()
903 904 */
904 905 typedef void (*_quick_exithdlr_func_t)(void);
905 906
906 907 typedef struct _qexthdlr {
907 908 struct _qexthdlr *next; /* next in handler list */
908 909 _quick_exithdlr_func_t hdlr; /* handler itself */
909 910 } _qexthdlr_t;
910 911
911 912 /*
912 913 * We add a pad on 32-bit systems to allow us to always have the structure size
913 914 * be 32-bytes which helps us deal with the compiler's alignment when building
914 915 * in ILP32 / LP64 systems.
915 916 */
916 917 typedef struct {
917 918 mutex_t exitfns_lock;
918 919 _qexthdlr_t *head;
919 920 #if !defined(_LP64)
920 921 uint32_t pad;
921 922 #endif
922 923 } quickexit_root_t;
923 924
924 925 #ifdef _SYSCALL32
925 926 typedef struct {
926 927 mutex_t exitfns_lock;
927 928 caddr32_t head;
928 929 uint32_t pad;
929 930 } quickexit_root32_t;
930 931 #endif /* _SYSCALL32 */
931 932
932 933 /*
933 934 * This is data that is global to all link maps (uberdata, aka super-global).
934 935 * Note: When changing this, please be sure to keep the 32-bit variant of
935 936 * this in sync. (see uberdata32_t below)
936 937 */
937 938 typedef struct uberdata {
938 939 pad_lock_t _link_lock;
939 940 pad_lock_t _ld_lock;
940 941 pad_lock_t _fork_lock;
941 942 pad_lock_t _atfork_lock;
942 943 pad32_lock_t _callout_lock;
943 944 pad32_lock_t _tdb_hash_lock;
944 945 tdb_sync_stats_t tdb_hash_lock_stats;
945 946 siguaction_t siguaction[NSIG];
946 947 bucket_t bucket[NBUCKETS];
947 948 atexit_root_t atexit_root;
948 949 quickexit_root_t quickexit_root;
949 950 tsd_metadata_t tsd_metadata;
950 951 tls_metadata_t tls_metadata;
951 952 /*
952 953 * Every object before this point has size and alignment of 64 bytes.
953 954 * Don't add any other type of data before this point.
954 955 */
955 956 char primary_map; /* set when primary link map is initialized */
956 957 char bucket_init; /* set when bucket[NBUCKETS] is initialized */
957 958 char pad[2];
958 959 uberflags_t uberflags;
959 960 queue_head_t *queue_head;
960 961 thr_hash_table_t *thr_hash_table;
961 962 uint_t hash_size; /* # of entries in thr_hash_table[] */
962 963 uint_t hash_mask; /* hash_size - 1 */
963 964 ulwp_t *ulwp_one; /* main thread */
964 965 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */
965 966 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */
966 967 int nthreads; /* total number of live threads/lwps */
967 968 int nzombies; /* total number of zombie threads */
968 969 int ndaemons; /* total number of THR_DAEMON threads/lwps */
969 970 pid_t pid; /* the current process's pid */
970 971 void (*sigacthandler)(int, siginfo_t *, void *);
971 972 ulwp_t *lwp_stacks;
972 973 ulwp_t *lwp_laststack;
973 974 int nfreestack;
974 975 int thread_stack_cache;
975 976 ulwp_t *ulwp_freelist;
976 977 ulwp_t *ulwp_lastfree;
977 978 ulwp_t *ulwp_replace_free;
978 979 ulwp_t *ulwp_replace_last;
979 980 atfork_t *atforklist; /* circular Q for fork handlers */
980 981 robust_t **robustlocks; /* table of registered robust locks */
981 982 robust_t *robustlist; /* list of registered robust locks */
982 983 char *progname; /* the basename of the program, from argv[0] */
983 984 void *ub_comm_page; /* arch-specific comm page of kernel data */
984 985 struct uberdata **tdb_bootstrap;
985 986 tdb_t tdb; /* thread debug interfaces (for libc_db) */
986 987 } uberdata_t;
987 988
988 989 #define link_lock _link_lock.pad_lock
989 990 #define ld_lock _ld_lock.pad_lock
990 991 #define fork_lock _fork_lock.pad_lock
991 992 #define atfork_lock _atfork_lock.pad_lock
992 993 #define callout_lock _callout_lock.pad_lock
993 994 #define tdb_hash_lock _tdb_hash_lock.pad_lock
994 995
995 996 #pragma align 64(__uberdata)
996 997 extern uberdata_t __uberdata;
997 998 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */
998 999 extern int primary_link_map;
999 1000
1000 1001 #define ulwp_mutex(ulwp, udp) \
1001 1002 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock)
1002 1003 #define ulwp_condvar(ulwp, udp) \
1003 1004 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond)
1004 1005
1005 1006 /*
1006 1007 * Grab and release the hash table lock for the specified lwp.
1007 1008 */
1008 1009 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp))
1009 1010 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp))
1010 1011
1011 1012 #ifdef _SYSCALL32 /* needed by libc_db */
1012 1013
1013 1014 typedef struct ulwp32 {
1014 1015 #if defined(__sparc)
1015 1016 uint32_t ul_dinstr; /* scratch space for dtrace */
1016 1017 uint32_t ul_padsparc0[15];
1017 1018 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */
1018 1019 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */
1019 1020 uint32_t ul_dftret; /* dtrace: return probe fasttrap */
1020 1021 uint32_t ul_dreturn; /* dtrace: return %o0 */
1021 1022 #endif
1022 1023 caddr32_t ul_self; /* pointer to self */
1023 1024 #if defined(__x86)
1024 1025 uint8_t ul_dinstr[40]; /* scratch space for dtrace */
1025 1026 #endif
1026 1027 caddr32_t ul_uberdata; /* uber (super-global) data */
1027 1028 tls32_t ul_tls; /* dynamic thread-local storage base */
1028 1029 caddr32_t ul_forw; /* forw, back all_lwps list, */
1029 1030 caddr32_t ul_back; /* protected by link_lock */
1030 1031 caddr32_t ul_next; /* list to keep track of stacks */
1031 1032 caddr32_t ul_hash; /* hash chain linked list */
1032 1033 caddr32_t ul_rval; /* return value from thr_exit() */
1033 1034 caddr32_t ul_stk; /* mapping base of the stack */
1034 1035 size32_t ul_mapsiz; /* mapping size of the stack */
1035 1036 size32_t ul_guardsize; /* normally _lpagesize */
1036 1037 caddr32_t ul_stktop; /* broken thr_stksegment() interface */
1037 1038 size32_t ul_stksiz; /* broken thr_stksegment() interface */
1038 1039 stack32_t ul_ustack; /* current stack boundaries */
1039 1040 int ul_ix; /* hash index */
1040 1041 lwpid_t ul_lwpid; /* thread id, aka the lwp id */
1041 1042 pri_t ul_pri; /* scheduling priority */
1042 1043 pri_t ul_epri; /* real-time ceiling priority */
1043 1044 char ul_policy; /* scheduling policy */
1044 1045 char ul_cid; /* scheduling class id */
1045 1046 union {
1046 1047 struct {
1047 1048 char cursig; /* deferred signal number */
1048 1049 char pleasestop; /* lwp requested to stop itself */
1049 1050 } s;
1050 1051 short curplease; /* for testing both at once */
1051 1052 } ul_cp;
1052 1053 char ul_stop; /* reason for stopping */
1053 1054 char ul_signalled; /* this lwp was cond_signal()d */
1054 1055 char ul_dead; /* this lwp has called thr_exit */
1055 1056 char ul_unwind; /* posix: unwind C++ stack */
1056 1057 char ul_detached; /* THR_DETACHED at thread_create() */
1057 1058 /* or pthread_detach() was called */
1058 1059 char ul_writer; /* sleeping in rw_wrlock() */
1059 1060 char ul_stopping; /* set by curthread: stopping self */
1060 1061 char ul_cancel_prologue; /* for _cancel_prologue() */
1061 1062 short ul_preempt; /* no_preempt()/preempt() */
1062 1063 short ul_savpreempt; /* pre-existing preempt value */
1063 1064 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */
1064 1065 char ul_main; /* thread is the main thread */
1065 1066 char ul_fork; /* thread is performing a fork */
1066 1067 char ul_primarymap; /* primary link-map is initialized */
1067 1068 /* per-thread copies of the corresponding global variables */
1068 1069 uint8_t ul_max_spinners; /* thread_max_spinners */
1069 1070 char ul_door_noreserve; /* thread_door_noreserve */
1070 1071 char ul_queue_fifo; /* thread_queue_fifo */
1071 1072 char ul_cond_wait_defer; /* thread_cond_wait_defer */
1072 1073 char ul_error_detection; /* thread_error_detection */
1073 1074 char ul_async_safe; /* thread_async_safe */
1074 1075 char ul_rt; /* found on an RT queue */
1075 1076 char ul_rtqueued; /* was RT when queued */
1076 1077 char ul_misaligned; /* thread_locks_misaligned */
1077 1078 char ul_pad[3];
1078 1079 int ul_adaptive_spin; /* thread_adaptive_spin */
1079 1080 int ul_queue_spin; /* thread_queue_spin */
1080 1081 int ul_critical; /* non-zero == in a critical region */
1081 1082 int ul_sigdefer; /* non-zero == defer signals */
1082 1083 int ul_vfork; /* thread is the child of vfork() */
1083 1084 int ul_cancelable; /* _cancelon()/_canceloff() */
1084 1085 char ul_cancel_pending; /* pthread_cancel() was called */
1085 1086 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */
1086 1087 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */
1087 1088 char ul_save_async; /* saved copy of ul_cancel_async */
1088 1089 char ul_mutator; /* lwp is a mutator (java interface) */
1089 1090 char ul_created; /* created suspended */
1090 1091 char ul_replace; /* replacement; must be free()d */
1091 1092 uchar_t ul_nocancel; /* cancellation can't happen */
1092 1093 int ul_errno; /* per-thread errno */
1093 1094 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */
1094 1095 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */
1095 1096 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */
1096 1097 caddr32_t ul_schedctl; /* schedctl data */
1097 1098 int ul_bindflags; /* bind_guard() interface to ld.so.1 */
1098 1099 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */
1099 1100 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */
1100 1101 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */
1101 1102 td_evbuf32_t ul_td_evbuf; /* event buffer */
1102 1103 char ul_td_events_enable; /* event mechanism enabled */
1103 1104 char ul_sync_obj_reg; /* tdb_sync_obj_register() */
1104 1105 char ul_qtype; /* MX or CV */
1105 1106 char ul_cv_wake; /* != 0: just wake up, don't requeue */
1106 1107 int ul_rtld; /* thread is running inside ld.so.1 */
1107 1108 int ul_usropts; /* flags given to thr_create() */
1108 1109 caddr32_t ul_startpc; /* start func (thr_create()) */
1109 1110 caddr32_t ul_startarg; /* argument for start function */
1110 1111 caddr32_t ul_wchan; /* synch object when sleeping */
1111 1112 caddr32_t ul_link; /* sleep queue link */
1112 1113 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */
1113 1114 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */
1114 1115 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */
1115 1116 int ul_save_state; /* bind_guard() interface to ld.so.1 */
1116 1117 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */
1117 1118 /* 0 means there is but a single entry */
1118 1119 union { /* single entry or pointer to array */
1119 1120 readlock32_t single;
1120 1121 caddr32_t array;
1121 1122 } ul_readlock;
1122 1123 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */
1123 1124 /* 0 means there is but a single entry */
1124 1125 union { /* single entry or pointer to array */
1125 1126 caddr32_t single;
1126 1127 caddr32_t array;
1127 1128 } ul_heldlocks;
1128 1129 /* PROBE_SUPPORT begin */
1129 1130 caddr32_t ul_tpdp;
1130 1131 /* PROBE_SUPPORT end */
1131 1132 caddr32_t ul_siglink; /* pointer to previous context */
1132 1133 uint_t ul_spin_lock_spin; /* spin lock statistics */
1133 1134 uint_t ul_spin_lock_spin2;
1134 1135 uint_t ul_spin_lock_sleep;
1135 1136 uint_t ul_spin_lock_wakeup;
1136 1137 queue_root32_t ul_queue_root; /* root of a sleep queue */
1137 1138 id_t ul_rtclassid; /* real-time class id */
1138 1139 uint_t ul_pilocks; /* count of PI locks held */
1139 1140 /* the following members *must* be last in the structure */
1140 1141 /* they are discarded when ulwp is replaced on thr_exit() */
1141 1142 sigset_t ul_sigmask; /* thread's current signal mask */
1142 1143 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */
1143 1144 siginfo32_t ul_siginfo; /* deferred siginfo */
1144 1145 mutex_t ul_spinlock; /* used when suspending/continuing */
1145 1146 fpuenv32_t ul_fpuenv; /* floating point state */
1146 1147 caddr32_t ul_sp; /* stack pointer when blocked */
1147 1148 #if defined(sparc)
1148 1149 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */
1149 1150 #endif
1150 1151 tumem32_t ul_tmem; /* used only by umem */
1151 1152 } ulwp32_t;
1152 1153
1153 1154 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask)
1154 1155
1155 1156 typedef struct uberdata32 {
1156 1157 pad_lock_t _link_lock;
1157 1158 pad_lock_t _ld_lock;
1158 1159 pad_lock_t _fork_lock;
1159 1160 pad_lock_t _atfork_lock;
1160 1161 pad32_lock_t _callout_lock;
1161 1162 pad32_lock_t _tdb_hash_lock;
1162 1163 tdb_sync_stats_t tdb_hash_lock_stats;
1163 1164 siguaction32_t siguaction[NSIG];
1164 1165 bucket32_t bucket[NBUCKETS];
1165 1166 atexit_root32_t atexit_root;
1166 1167 quickexit_root32_t quickexit_root;
1167 1168 tsd_metadata32_t tsd_metadata;
1168 1169 tls_metadata32_t tls_metadata;
1169 1170 char primary_map;
1170 1171 char bucket_init;
1171 1172 char pad[2];
1172 1173 uberflags_t uberflags;
1173 1174 caddr32_t queue_head;
1174 1175 caddr32_t thr_hash_table;
1175 1176 uint_t hash_size;
1176 1177 uint_t hash_mask;
1177 1178 caddr32_t ulwp_one;
1178 1179 caddr32_t all_lwps;
1179 1180 caddr32_t all_zombies;
1180 1181 int nthreads;
1181 1182 int nzombies;
1182 1183 int ndaemons;
1183 1184 int pid;
1184 1185 caddr32_t sigacthandler;
1185 1186 caddr32_t lwp_stacks;
1186 1187 caddr32_t lwp_laststack;
1187 1188 int nfreestack;
1188 1189 int thread_stack_cache;
1189 1190 caddr32_t ulwp_freelist;
1190 1191 caddr32_t ulwp_lastfree;
1191 1192 caddr32_t ulwp_replace_free;
1192 1193 caddr32_t ulwp_replace_last;
1193 1194 caddr32_t atforklist;
1194 1195 caddr32_t robustlocks;
1195 1196 caddr32_t robustlist;
1196 1197 caddr32_t progname;
1197 1198 caddr32_t ub_comm_page;
1198 1199 caddr32_t tdb_bootstrap;
1199 1200 tdb32_t tdb;
1200 1201 } uberdata32_t;
1201 1202
1202 1203 #endif /* _SYSCALL32 */
1203 1204
1204 1205 /* ul_stop values */
1205 1206 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */
1206 1207 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */
1207 1208 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */
1208 1209
1209 1210 /*
1210 1211 * Implementation-specific attribute types for pthread_mutexattr_init() etc.
1211 1212 */
1212 1213
1213 1214 typedef struct _cvattr {
1214 1215 int pshared;
1215 1216 clockid_t clockid;
1216 1217 } cvattr_t;
1217 1218
1218 1219 typedef struct _mattr {
1219 1220 int pshared;
1220 1221 int protocol;
1221 1222 int prioceiling;
1222 1223 int type;
1223 1224 int robustness;
1224 1225 } mattr_t;
1225 1226
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1226 1227 typedef struct _thrattr {
1227 1228 size_t stksize;
1228 1229 void *stkaddr;
1229 1230 int detachstate;
1230 1231 int daemonstate;
1231 1232 int scope;
1232 1233 int prio;
1233 1234 int policy;
1234 1235 int inherit;
1235 1236 size_t guardsize;
1237 + char name[THREAD_NAME_MAX];
1236 1238 } thrattr_t;
1237 1239
1238 1240 typedef struct _rwlattr {
1239 1241 int pshared;
1240 1242 } rwlattr_t;
1241 1243
1242 1244 /* _curthread() is inline for speed */
1243 1245 extern ulwp_t *_curthread(void);
1244 1246 #define curthread (_curthread())
1245 1247
1246 1248 /* this version (also inline) can be tested for NULL */
1247 1249 extern ulwp_t *__curthread(void);
1248 1250
1249 1251 /* get the current stack pointer (also inline) */
1250 1252 extern greg_t stkptr(void);
1251 1253
1252 1254 /*
1253 1255 * Suppress __attribute__((...)) if we are not compiling with gcc
1254 1256 */
1255 1257 #if !defined(__GNUC__)
1256 1258 #define __attribute__(string)
1257 1259 #endif
1258 1260
1259 1261 /* Fetch the dispatch (kernel) priority of a thread */
1260 1262 #define real_priority(ulwp) \
1261 1263 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0)
1262 1264
1263 1265 /*
1264 1266 * Implementation functions. Not visible outside of the library itself.
1265 1267 */
1266 1268 extern int __nanosleep(const timespec_t *, timespec_t *);
1267 1269 extern void getgregs(ulwp_t *, gregset_t);
1268 1270 extern void setgregs(ulwp_t *, gregset_t);
1269 1271 extern void thr_panic(const char *);
1270 1272 #pragma rarely_called(thr_panic)
1271 1273 extern void mutex_panic(mutex_t *, const char *);
1272 1274 #pragma rarely_called(mutex_panic)
1273 1275 extern ulwp_t *find_lwp(thread_t);
1274 1276 extern void finish_init(void);
1275 1277 extern void update_sched(ulwp_t *);
1276 1278 extern void queue_alloc(void);
1277 1279 extern void tmem_exit(void);
1278 1280 extern void tsd_exit(void);
1279 1281 extern void tsd_free(ulwp_t *);
1280 1282 extern void tls_setup(void);
1281 1283 extern void tls_exit(void);
1282 1284 extern void tls_free(ulwp_t *);
1283 1285 extern void rwl_free(ulwp_t *);
1284 1286 extern void heldlock_exit(void);
1285 1287 extern void heldlock_free(ulwp_t *);
1286 1288 extern void sigacthandler(int, siginfo_t *, void *);
1287 1289 extern void signal_init(void);
1288 1290 extern int sigequalset(const sigset_t *, const sigset_t *);
1289 1291 extern void mutex_setup(void);
1290 1292 extern void take_deferred_signal(int);
1291 1293 extern void *setup_top_frame(void *, size_t, ulwp_t *);
1292 1294 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *),
1293 1295 ulwp_t *ulwp, caddr_t stk, size_t stksize);
1294 1296 extern volatile sc_shared_t *setup_schedctl(void);
1295 1297 extern void *lmalloc(size_t);
1296 1298 extern void lfree(void *, size_t);
1297 1299 extern void *libc_malloc(size_t);
1298 1300 extern void *libc_realloc(void *, size_t);
1299 1301 extern void libc_free(void *);
1300 1302 extern char *libc_strdup(const char *);
1301 1303 extern void ultos(uint64_t, int, char *);
1302 1304 extern void lock_error(const mutex_t *, const char *, void *, const char *);
1303 1305 extern void rwlock_error(const rwlock_t *, const char *, const char *);
1304 1306 extern void thread_error(const char *);
1305 1307 extern void grab_assert_lock(void);
1306 1308 extern void dump_queue_statistics(void);
1307 1309 extern void collect_queue_statistics(void);
1308 1310 extern void record_spin_locks(ulwp_t *);
1309 1311 extern void remember_lock(mutex_t *);
1310 1312 extern void forget_lock(mutex_t *);
1311 1313 extern void register_lock(mutex_t *);
1312 1314 extern void unregister_locks(void);
1313 1315 #if defined(__sparc)
1314 1316 extern void _flush_windows(void);
1315 1317 #else
1316 1318 #define _flush_windows()
1317 1319 #endif
1318 1320 extern void set_curthread(void *);
1319 1321
1320 1322 /*
1321 1323 * Utility function used when waking up many threads (more than MAXLWPS)
1322 1324 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock().
1323 1325 */
1324 1326 #define MAXLWPS 128 /* max remembered lwpids before overflow */
1325 1327 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */
1326 1328 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *);
1327 1329
1328 1330 /* enter a critical section */
1329 1331 #define enter_critical(self) (self->ul_critical++)
1330 1332
1331 1333 /* exit a critical section, take deferred actions if necessary */
1332 1334 extern void do_exit_critical(void);
1333 1335 #define exit_critical(self) \
1334 1336 (void) (self->ul_critical--, \
1335 1337 ((self->ul_curplease && self->ul_critical == 0)? \
1336 1338 (do_exit_critical(), 0) : 0))
1337 1339
1338 1340 /*
1339 1341 * Like enter_critical()/exit_critical() but just for deferring signals.
1340 1342 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while
1341 1343 * calling application functions like constructors and destructors.
1342 1344 * Care must be taken if the application function attempts to set
1343 1345 * the signal mask while a deferred signal is present; the setting
1344 1346 * of the signal mask must also be deferred.
1345 1347 */
1346 1348 #define sigoff(self) (self->ul_sigdefer++)
1347 1349 #define sigon(self) \
1348 1350 (void) ((--self->ul_sigdefer == 0 && \
1349 1351 self->ul_curplease && self->ul_critical == 0)? \
1350 1352 (do_exit_critical(), 0) : 0)
1351 1353
1352 1354 /* these are exported functions */
1353 1355 extern void _sigoff(void);
1354 1356 extern void _sigon(void);
1355 1357
1356 1358 #define sigorset(s1, s2) \
1357 1359 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \
1358 1360 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \
1359 1361 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \
1360 1362 ((s1)->__sigbits[3] |= (s2)->__sigbits[3]))
1361 1363
1362 1364 #define sigandset(s1, s2) \
1363 1365 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \
1364 1366 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \
1365 1367 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \
1366 1368 ((s1)->__sigbits[3] &= (s2)->__sigbits[3]))
1367 1369
1368 1370 #define sigdiffset(s1, s2) \
1369 1371 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \
1370 1372 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \
1371 1373 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \
1372 1374 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3]))
1373 1375
1374 1376 #define delete_reserved_signals(s) \
1375 1377 (((s)->__sigbits[0] &= MASKSET0), \
1376 1378 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\
1377 1379 ((s)->__sigbits[2] &= MASKSET2), \
1378 1380 ((s)->__sigbits[3] &= MASKSET3))
1379 1381
1380 1382 extern void block_all_signals(ulwp_t *self);
1381 1383
1382 1384 /*
1383 1385 * When restoring the signal mask after having previously called
1384 1386 * block_all_signals(), if we have a deferred signal present then
1385 1387 * do nothing other than ASSERT() that we are in a critical region.
1386 1388 * The signal mask will be set when we emerge from the critical region
1387 1389 * and call take_deferred_signal(). There is no race condition here
1388 1390 * because the kernel currently has all signals blocked for this thread.
1389 1391 */
1390 1392 #define restore_signals(self) \
1391 1393 ((void) ((self)->ul_cursig? \
1392 1394 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \
1393 1395 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask)))
1394 1396
1395 1397 extern void set_cancel_pending_flag(ulwp_t *, int);
1396 1398 extern void set_cancel_eintr_flag(ulwp_t *);
1397 1399 extern void set_parking_flag(ulwp_t *, int);
1398 1400 extern int cancel_active(void);
1399 1401
1400 1402 extern void *_thrp_setup(ulwp_t *);
1401 1403 extern void _fpinherit(ulwp_t *);
1402 1404 extern void _lwp_start(void);
1403 1405 extern void _lwp_terminate(void);
1404 1406 extern void lmutex_lock(mutex_t *);
1405 1407 extern void lmutex_unlock(mutex_t *);
1406 1408 extern void lrw_rdlock(rwlock_t *);
1407 1409 extern void lrw_wrlock(rwlock_t *);
1408 1410 extern void lrw_unlock(rwlock_t *);
1409 1411 extern void sig_mutex_lock(mutex_t *);
1410 1412 extern void sig_mutex_unlock(mutex_t *);
1411 1413 extern int sig_mutex_trylock(mutex_t *);
1412 1414 extern int sig_cond_wait(cond_t *, mutex_t *);
1413 1415 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *);
1414 1416 extern void cancel_safe_mutex_lock(mutex_t *);
1415 1417 extern void cancel_safe_mutex_unlock(mutex_t *);
1416 1418 extern int cancel_safe_mutex_trylock(mutex_t *);
1417 1419 extern void _prefork_handler(void);
1418 1420 extern void _postfork_parent_handler(void);
1419 1421 extern void _postfork_child_handler(void);
1420 1422 extern void postfork1_child(void);
1421 1423 extern void postfork1_child_aio(void);
1422 1424 extern void postfork1_child_sigev_aio(void);
1423 1425 extern void postfork1_child_sigev_mq(void);
1424 1426 extern void postfork1_child_sigev_timer(void);
1425 1427 extern void postfork1_child_tpool(void);
1426 1428 extern void fork_lock_enter(void);
1427 1429 extern void fork_lock_exit(void);
1428 1430 extern void suspend_fork(void);
1429 1431 extern void continue_fork(int);
1430 1432 extern void do_sigcancel(void);
1431 1433 extern void setup_cancelsig(int);
1432 1434 extern void init_sigev_thread(void);
1433 1435 extern void init_aio(void);
1434 1436 extern void init_progname(void);
1435 1437 extern void _cancelon(void);
1436 1438 extern void _canceloff(void);
1437 1439 extern void _canceloff_nocancel(void);
1438 1440 extern void _cancel_prologue(void);
1439 1441 extern void _cancel_epilogue(void);
1440 1442 extern void no_preempt(ulwp_t *);
1441 1443 extern void preempt(ulwp_t *);
1442 1444 extern void _thrp_unwind(void *);
1443 1445
1444 1446 extern pid_t __forkx(int);
1445 1447 extern pid_t __forkallx(int);
1446 1448 extern int __open(const char *, int, mode_t);
1447 1449 extern int __open64(const char *, int, mode_t);
1448 1450 extern int __openat(int, const char *, int, mode_t);
1449 1451 extern int __openat64(int, const char *, int, mode_t);
1450 1452 extern int __close(int);
1451 1453 extern ssize_t __read(int, void *, size_t);
1452 1454 extern ssize_t __write(int, const void *, size_t);
1453 1455 extern int __fcntl(int, int, ...);
1454 1456 extern int __lwp_continue(lwpid_t);
1455 1457 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *);
1456 1458 extern int ___lwp_suspend(lwpid_t);
1457 1459 extern int lwp_wait(lwpid_t, lwpid_t *);
1458 1460 extern int __lwp_wait(lwpid_t, lwpid_t *);
1459 1461 extern int __lwp_detach(lwpid_t);
1460 1462 extern sc_shared_t *__schedctl(void);
1461 1463
1462 1464 /* actual system call traps */
1463 1465 extern int __setcontext(const ucontext_t *);
1464 1466 extern int __getcontext(ucontext_t *);
1465 1467 extern int __clock_gettime(clockid_t, timespec_t *);
1466 1468 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *);
1467 1469 extern void hrt2ts(hrtime_t, timespec_t *);
1468 1470
1469 1471 extern int __sigaction(int, const struct sigaction *, struct sigaction *);
1470 1472 extern int __sigprocmask(int, const sigset_t *, sigset_t *);
1471 1473 extern int __lwp_sigmask(int, const sigset_t *);
1472 1474 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)());
1473 1475 extern caddr_t __sighndlrend;
1474 1476 #pragma unknown_control_flow(__sighndlr)
1475 1477
1476 1478 /* belongs in <pthread.h> */
1477 1479 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */
1478 1480 #define PTHREAD_CREATE_NONDAEMON_NP 0
1479 1481 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int);
1480 1482 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *);
1481 1483
1482 1484 extern int mutex_held(mutex_t *);
1483 1485 extern int mutex_lock_internal(mutex_t *, timespec_t *, int);
1484 1486 extern int mutex_unlock_internal(mutex_t *, int);
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1485 1487
1486 1488 /* not cancellation points: */
1487 1489 extern int __cond_wait(cond_t *, mutex_t *);
1488 1490 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *);
1489 1491 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *);
1490 1492
1491 1493 extern int rw_read_held(rwlock_t *);
1492 1494 extern int rw_write_held(rwlock_t *);
1493 1495
1494 1496 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long,
1495 - thread_t *, size_t);
1497 + thread_t *, size_t, const char *);
1496 1498 extern int _thrp_suspend(thread_t, uchar_t);
1497 1499 extern int _thrp_continue(thread_t, uchar_t);
1498 1500
1499 1501 extern void _thrp_terminate(void *);
1500 1502 extern void _thrp_exit(void);
1501 1503
1502 1504 extern const pcclass_t *get_info_by_class(id_t);
1503 1505 extern const pcclass_t *get_info_by_policy(int);
1504 1506 extern const thrattr_t *def_thrattr(void);
1505 1507 extern id_t setparam(idtype_t, id_t, int, int);
1506 1508 extern id_t setprio(idtype_t, id_t, int, int *);
1507 1509 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *);
1508 1510
1509 1511 /*
1510 1512 * System call wrappers (direct interfaces to the kernel)
1511 1513 */
1512 1514 extern int ___lwp_mutex_register(mutex_t *, mutex_t **);
1513 1515 extern int ___lwp_mutex_trylock(mutex_t *, ulwp_t *);
1514 1516 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *, ulwp_t *);
1515 1517 extern int ___lwp_mutex_unlock(mutex_t *);
1516 1518 extern int ___lwp_mutex_wakeup(mutex_t *, int);
1517 1519 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int);
1518 1520 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int);
1519 1521 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *);
1520 1522 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *);
1521 1523 extern int __lwp_rwlock_tryrdlock(rwlock_t *);
1522 1524 extern int __lwp_rwlock_trywrlock(rwlock_t *);
1523 1525 extern int __lwp_rwlock_unlock(rwlock_t *);
1524 1526 extern int __lwp_park(timespec_t *, lwpid_t);
1525 1527 extern int __lwp_unpark(lwpid_t);
1526 1528 extern int __lwp_unpark_all(lwpid_t *, int);
1527 1529 #if defined(__x86)
1528 1530 extern int ___lwp_private(int, int, void *);
1529 1531 #endif /* __x86 */
1530 1532
1531 1533 /*
1532 1534 * inlines
1533 1535 */
1534 1536 extern int set_lock_byte(volatile uint8_t *);
1535 1537 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t);
1536 1538 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t);
1537 1539 extern void atomic_inc_32(volatile uint32_t *);
1538 1540 extern void atomic_dec_32(volatile uint32_t *);
1539 1541 extern void atomic_and_32(volatile uint32_t *, uint32_t);
1540 1542 extern void atomic_or_32(volatile uint32_t *, uint32_t);
1541 1543 #if defined(__sparc)
1542 1544 extern ulong_t caller(void);
1543 1545 extern ulong_t getfp(void);
1544 1546 #endif /* __sparc */
1545 1547
1546 1548 #include "thr_inlines.h"
1547 1549
1548 1550 #endif /* _THR_UBERDATA_H */
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