1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2005 Daniel M. Eischen <deischen@freebsd.org> 5 * Copyright (c) 2005 David Xu <davidxu@freebsd.org> 6 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>. 7 * 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice unmodified, this list of conditions, and the following 15 * disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _THR_PRIVATE_H 33 #define _THR_PRIVATE_H 34 35 /* 36 * Include files. 37 */ 38 #include <sys/types.h> 39 #include <sys/time.h> 40 #include <sys/queue.h> 41 #include <sys/param.h> 42 #include <sys/cpuset.h> 43 #include <sys/exterrvar.h> 44 #include <machine/atomic.h> 45 #include <errno.h> 46 #include <limits.h> 47 #include <signal.h> 48 #include <stdbool.h> 49 #include <stddef.h> 50 #include <stdio.h> 51 #include <unistd.h> 52 #include <ucontext.h> 53 #include <sys/thr.h> 54 #include <pthread.h> 55 56 __NULLABILITY_PRAGMA_PUSH 57 58 #define SYM_FB10(sym) __CONCAT(sym, _fb10) 59 #define SYM_FBP10(sym) __CONCAT(sym, _fbp10) 60 #define WEAK_REF(sym, alias) __weak_reference(sym, alias) 61 #define SYM_COMPAT(sym, impl, ver) __sym_compat(sym, impl, ver) 62 #define SYM_DEFAULT(sym, impl, ver) __sym_default(sym, impl, ver) 63 64 #define FB10_COMPAT(func, sym) \ 65 WEAK_REF(func, SYM_FB10(sym)); \ 66 SYM_COMPAT(sym, SYM_FB10(sym), FBSD_1.0) 67 68 #define FB10_COMPAT_PRIVATE(func, sym) \ 69 WEAK_REF(func, SYM_FBP10(sym)); \ 70 SYM_DEFAULT(sym, SYM_FBP10(sym), FBSDprivate_1.0) 71 72 struct pthread; 73 extern struct pthread *_thr_initial __hidden; 74 75 #include "pthread_md.h" 76 #include "thr_umtx.h" 77 #include "thread_db.h" 78 79 #ifdef _PTHREAD_FORCED_UNWIND 80 #define _BSD_SOURCE 81 #include <unwind.h> 82 #endif 83 84 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 85 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 86 TAILQ_HEAD(mutex_queue, pthread_mutex); 87 88 /* Signal to do cancellation */ 89 #define SIGCANCEL SIGTHR 90 91 /* 92 * Kernel fatal error handler macro. 93 */ 94 #define PANIC(args...) _thread_exitf(__FILE__, __LINE__, ##args) 95 96 /* Output debug messages like this: */ 97 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 98 #define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args) 99 100 #ifdef _PTHREADS_INVARIANTS 101 #define THR_ASSERT(cond, msg) do { \ 102 if (__predict_false(!(cond))) \ 103 PANIC(msg); \ 104 } while (0) 105 #else 106 #define THR_ASSERT(cond, msg) 107 #endif 108 109 #ifdef PIC 110 # define STATIC_LIB_REQUIRE(name) 111 #else 112 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name) 113 #endif 114 115 #define TIMESPEC_ADD(dst, src, val) \ 116 do { \ 117 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \ 118 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \ 119 if ((dst)->tv_nsec >= 1000000000) { \ 120 (dst)->tv_sec++; \ 121 (dst)->tv_nsec -= 1000000000; \ 122 } \ 123 } while (0) 124 125 #define TIMESPEC_SUB(dst, src, val) \ 126 do { \ 127 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ 128 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ 129 if ((dst)->tv_nsec < 0) { \ 130 (dst)->tv_sec--; \ 131 (dst)->tv_nsec += 1000000000; \ 132 } \ 133 } while (0) 134 135 /* Magic cookie set for shared pthread locks and cv's pointers */ 136 #define THR_PSHARED_PTR \ 137 ((void *)(uintptr_t)((1ULL << (NBBY * sizeof(long) - 1)) | 1)) 138 139 /* XXX These values should be same as those defined in pthread.h */ 140 #define THR_MUTEX_INITIALIZER ((struct pthread_mutex *)NULL) 141 #define THR_ADAPTIVE_MUTEX_INITIALIZER ((struct pthread_mutex *)1) 142 #define THR_MUTEX_DESTROYED ((struct pthread_mutex *)2) 143 #define THR_COND_INITIALIZER ((struct pthread_cond *)NULL) 144 #define THR_COND_DESTROYED ((struct pthread_cond *)1) 145 #define THR_RWLOCK_INITIALIZER ((struct pthread_rwlock *)NULL) 146 #define THR_RWLOCK_DESTROYED ((struct pthread_rwlock *)1) 147 148 #define PMUTEX_FLAG_TYPE_MASK 0x0ff 149 #define PMUTEX_FLAG_PRIVATE 0x100 150 #define PMUTEX_FLAG_DEFERRED 0x200 151 #define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK) 152 153 #define PMUTEX_OWNER_ID(m) ((m)->m_lock.m_owner & ~UMUTEX_CONTESTED) 154 155 #define MAX_DEFER_WAITERS 50 156 157 /* 158 * Values for pthread_mutex m_ps indicator. 159 */ 160 #define PMUTEX_INITSTAGE_ALLOC 0 161 #define PMUTEX_INITSTAGE_BUSY 1 162 #define PMUTEX_INITSTAGE_DONE 2 163 164 struct pthread_mutex { 165 /* 166 * Lock for accesses to this structure. 167 */ 168 struct umutex m_lock; 169 int m_flags; 170 int m_count; 171 int m_spinloops; 172 int m_yieldloops; 173 int m_ps; /* pshared init stage */ 174 /* 175 * Link for all mutexes a thread currently owns, of the same 176 * prio type. 177 */ 178 TAILQ_ENTRY(pthread_mutex) m_qe; 179 /* Link for all private mutexes a thread currently owns. */ 180 TAILQ_ENTRY(pthread_mutex) m_pqe; 181 struct pthread_mutex *m_rb_prev; 182 }; 183 184 struct pthread_mutex_attr { 185 enum pthread_mutextype m_type; 186 int m_protocol; 187 int m_ceiling; 188 int m_pshared; 189 int m_robust; 190 }; 191 192 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 193 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE, \ 194 PTHREAD_MUTEX_STALLED } 195 196 struct pthread_cond { 197 __uint32_t __has_user_waiters; 198 struct ucond kcond; 199 }; 200 201 struct pthread_cond_attr { 202 int c_pshared; 203 int c_clockid; 204 }; 205 206 struct pthread_barrier { 207 struct umutex b_lock; 208 struct ucond b_cv; 209 int64_t b_cycle; 210 int b_count; 211 int b_waiters; 212 int b_refcount; 213 int b_destroying; 214 }; 215 216 struct pthread_barrierattr { 217 int pshared; 218 }; 219 220 struct pthread_spinlock { 221 struct umutex s_lock; 222 }; 223 224 /* 225 * Flags for condition variables. 226 */ 227 #define COND_FLAGS_PRIVATE 0x01 228 #define COND_FLAGS_INITED 0x02 229 #define COND_FLAGS_BUSY 0x04 230 231 /* 232 * Cleanup definitions. 233 */ 234 struct pthread_cleanup { 235 struct pthread_cleanup *prev; 236 void (*routine)(void *); 237 void *routine_arg; 238 int onheap; 239 }; 240 241 #define THR_CLEANUP_PUSH(td, func, arg) { \ 242 struct pthread_cleanup __cup; \ 243 \ 244 __cup.routine = func; \ 245 __cup.routine_arg = arg; \ 246 __cup.onheap = 0; \ 247 __cup.prev = (td)->cleanup; \ 248 (td)->cleanup = &__cup; 249 250 #define THR_CLEANUP_POP(td, exec) \ 251 (td)->cleanup = __cup.prev; \ 252 if ((exec) != 0) \ 253 __cup.routine(__cup.routine_arg); \ 254 } 255 256 struct pthread_atfork { 257 TAILQ_ENTRY(pthread_atfork) qe; 258 void (*prepare)(void); 259 void (*parent)(void); 260 void (*child)(void); 261 }; 262 263 struct pthread_attr { 264 int sched_policy; 265 int sched_inherit; 266 int prio; 267 int suspend; 268 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 269 int flags; 270 void *stackaddr_attr; 271 size_t stacksize_attr; 272 size_t guardsize_attr; 273 cpuset_t *cpuset; 274 size_t cpusetsize; 275 }; 276 277 struct wake_addr { 278 struct wake_addr *link; 279 unsigned int value; 280 char pad[12]; 281 }; 282 283 struct sleepqueue { 284 TAILQ_HEAD(, pthread) sq_blocked; 285 SLIST_HEAD(, sleepqueue) sq_freeq; 286 LIST_ENTRY(sleepqueue) sq_hash; 287 SLIST_ENTRY(sleepqueue) sq_flink; 288 void *sq_wchan; 289 int sq_type; 290 }; 291 292 /* 293 * Thread creation state attributes. 294 */ 295 #define THR_CREATE_RUNNING 0 296 #define THR_CREATE_SUSPENDED 1 297 298 /* 299 * Miscellaneous definitions. 300 */ 301 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 302 303 /* 304 * Maximum size of initial thread's stack. This perhaps deserves to be larger 305 * than the stacks of other threads, since many applications are likely to run 306 * almost entirely on this stack. 307 */ 308 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 309 310 /* 311 * Define priorities returned by kernel. 312 */ 313 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) 314 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) 315 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) 316 317 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) 318 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) 319 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) 320 321 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ 322 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) 323 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) 324 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) 325 326 struct pthread_prio { 327 int pri_min; 328 int pri_max; 329 int pri_default; 330 }; 331 332 struct pthread_rwlockattr { 333 int pshared; 334 }; 335 336 struct pthread_rwlock { 337 struct urwlock lock; 338 uint32_t owner; 339 }; 340 341 /* 342 * Thread states. 343 */ 344 enum pthread_state { 345 PS_RUNNING, 346 PS_DEAD 347 }; 348 349 struct pthread_specific_elem { 350 const void *data; 351 int seqno; 352 }; 353 354 struct pthread_key { 355 volatile int allocated; 356 int seqno; 357 void (*destructor)(void *); 358 }; 359 360 /* 361 * lwpid_t is 32bit but kernel thr API exports tid as long type 362 * to preserve the ABI for M:N model in very early date (r131431). 363 */ 364 #define TID(thread) ((uint32_t) ((thread)->tid)) 365 366 /* 367 * Thread structure. 368 */ 369 struct pthread { 370 #define _pthread_startzero tid 371 /* Kernel thread id. */ 372 long tid; 373 #define TID_TERMINATED 1 374 375 /* 376 * Lock for accesses to this thread structure. 377 */ 378 struct umutex lock; 379 380 /* Internal condition variable cycle number. */ 381 uint32_t cycle; 382 383 /* How many low level locks the thread held. */ 384 int locklevel; 385 386 /* 387 * Set to non-zero when this thread has entered a critical 388 * region. We allow for recursive entries into critical regions. 389 */ 390 int critical_count; 391 392 /* Signal blocked counter. */ 393 int sigblock; 394 395 /* Fast sigblock var. */ 396 uint32_t fsigblock; 397 398 /* Queue entry for list of all threads. */ 399 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 400 401 /* Queue entry for GC lists. */ 402 TAILQ_ENTRY(pthread) gcle; 403 404 /* Hash queue entry. */ 405 LIST_ENTRY(pthread) hle; 406 407 /* Sleep queue entry */ 408 TAILQ_ENTRY(pthread) wle; 409 410 /* Threads reference count. */ 411 int refcount; 412 413 /* 414 * Thread start routine, argument, stack pointer and thread 415 * attributes. 416 */ 417 void *(*start_routine)(void *); 418 void *arg; 419 struct pthread_attr attr; 420 421 #define SHOULD_CANCEL(thr) \ 422 ((thr)->cancel_pending && (thr)->cancel_enable && \ 423 (thr)->no_cancel == 0) 424 425 /* Cancellation is enabled */ 426 int cancel_enable; 427 428 /* Cancellation request is pending */ 429 int cancel_pending; 430 431 /* Thread is at cancellation point */ 432 int cancel_point; 433 434 /* Cancellation is temporarily disabled */ 435 int no_cancel; 436 437 /* Asynchronouse cancellation is enabled */ 438 int cancel_async; 439 440 /* Cancellation is in progress */ 441 int cancelling; 442 443 /* Thread temporary signal mask. */ 444 sigset_t sigmask; 445 446 /* Thread should unblock SIGCANCEL. */ 447 int unblock_sigcancel; 448 449 /* In sigsuspend state */ 450 int in_sigsuspend; 451 452 /* deferred signal info */ 453 siginfo_t deferred_siginfo; 454 455 /* signal mask to restore. */ 456 sigset_t deferred_sigmask; 457 458 /* the sigaction should be used for deferred signal. */ 459 struct sigaction deferred_sigact; 460 461 /* deferred signal delivery is performed, do not reenter. */ 462 int deferred_run; 463 464 /* Force new thread to exit. */ 465 int force_exit; 466 467 /* Thread state: */ 468 enum pthread_state state; 469 470 /* 471 * Error variable used instead of errno. The function __error() 472 * returns a pointer to this. 473 */ 474 int error; 475 476 /* 477 * The joiner is the thread that is joining to this thread. The 478 * join status keeps track of a join operation to another thread. 479 */ 480 struct pthread *joiner; 481 482 /* Miscellaneous flags; only set with scheduling lock held. */ 483 int flags; 484 #define THR_FLAGS_PRIVATE 0x0001 485 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 486 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 487 #define THR_FLAGS_DETACHED 0x0008 /* thread is detached */ 488 489 /* Thread list flags; only set with thread list lock held. */ 490 int tlflags; 491 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 492 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 493 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 494 495 /* 496 * Queues of the owned mutexes. Private queue must have index 497 * + 1 of the corresponding full queue. 498 */ 499 #define TMQ_NORM 0 /* NORMAL or PRIO_INHERIT normal */ 500 #define TMQ_NORM_PRIV 1 /* NORMAL or PRIO_INHERIT normal priv */ 501 #define TMQ_NORM_PP 2 /* PRIO_PROTECT normal mutexes */ 502 #define TMQ_NORM_PP_PRIV 3 /* PRIO_PROTECT normal priv */ 503 #define TMQ_ROBUST_PP 4 /* PRIO_PROTECT robust mutexes */ 504 #define TMQ_ROBUST_PP_PRIV 5 /* PRIO_PROTECT robust priv */ 505 #define TMQ_NITEMS 6 506 struct mutex_queue mq[TMQ_NITEMS]; 507 508 void *ret; 509 struct pthread_specific_elem *specific; 510 int specific_data_count; 511 512 /* Number rwlocks rdlocks held. */ 513 int rdlock_count; 514 515 /* 516 * Current locks bitmap for rtld. */ 517 int rtld_bits; 518 519 /* Thread control block */ 520 struct tcb *tcb; 521 522 /* Cleanup handlers Link List */ 523 struct pthread_cleanup *cleanup; 524 525 #ifdef _PTHREAD_FORCED_UNWIND 526 struct _Unwind_Exception ex; 527 void *unwind_stackend; 528 int unwind_disabled; 529 #endif 530 531 /* 532 * Magic value to help recognize a valid thread structure 533 * from an invalid one: 534 */ 535 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 536 u_int32_t magic; 537 538 /* Enable event reporting */ 539 int report_events; 540 541 /* Event mask */ 542 int event_mask; 543 544 /* Event */ 545 td_event_msg_t event_buf; 546 547 /* Wait channel */ 548 void *wchan; 549 550 /* Referenced mutex. */ 551 struct pthread_mutex *mutex_obj; 552 553 /* Thread will sleep. */ 554 int will_sleep; 555 556 /* Number of threads deferred. */ 557 int nwaiter_defer; 558 559 int robust_inited; 560 uintptr_t robust_list; 561 uintptr_t priv_robust_list; 562 uintptr_t inact_mtx; 563 564 /* Deferred threads from pthread_cond_signal. */ 565 unsigned int *defer_waiters[MAX_DEFER_WAITERS]; 566 567 /* rtld thread-local dlerror message and seen control */ 568 char dlerror_msg[512]; 569 int dlerror_seen; 570 571 #define _pthread_endzero wake_addr 572 struct wake_addr *wake_addr; 573 #define WAKE_ADDR(td) ((td)->wake_addr) 574 575 /* Sleep queue */ 576 struct sleepqueue *sleepqueue; 577 578 /* pthread_set/get_name_np */ 579 char *name; 580 581 struct uexterror uexterr; 582 }; 583 584 #define THR_SHOULD_GC(thrd) \ 585 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \ 586 ((thrd)->flags & THR_FLAGS_DETACHED) != 0) 587 588 #define THR_IN_CRITICAL(thrd) \ 589 (((thrd)->locklevel > 0) || \ 590 ((thrd)->critical_count > 0)) 591 592 #define THR_CRITICAL_ENTER(thrd) \ 593 (thrd)->critical_count++ 594 595 #define THR_CRITICAL_LEAVE(thrd) \ 596 do { \ 597 (thrd)->critical_count--; \ 598 _thr_ast(thrd); \ 599 } while (0) 600 601 #define THR_UMUTEX_TRYLOCK(thrd, lck) \ 602 _thr_umutex_trylock((lck), TID(thrd)) 603 604 #define THR_UMUTEX_LOCK(thrd, lck) \ 605 _thr_umutex_lock((lck), TID(thrd)) 606 607 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 608 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 609 610 #define THR_UMUTEX_UNLOCK(thrd, lck) \ 611 _thr_umutex_unlock((lck), TID(thrd)) 612 613 #define THR_LOCK_ACQUIRE(thrd, lck) \ 614 do { \ 615 (thrd)->locklevel++; \ 616 _thr_umutex_lock(lck, TID(thrd)); \ 617 } while (0) 618 619 #define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \ 620 do { \ 621 (thrd)->locklevel++; \ 622 _thr_umutex_lock_spin(lck, TID(thrd)); \ 623 } while (0) 624 625 #ifdef _PTHREADS_INVARIANTS 626 #define THR_ASSERT_LOCKLEVEL(thrd) \ 627 do { \ 628 if (__predict_false((thrd)->locklevel <= 0)) \ 629 _thr_assert_lock_level(); \ 630 } while (0) 631 #else 632 #define THR_ASSERT_LOCKLEVEL(thrd) 633 #endif 634 635 #define THR_LOCK_RELEASE(thrd, lck) \ 636 do { \ 637 THR_ASSERT_LOCKLEVEL(thrd); \ 638 _thr_umutex_unlock((lck), TID(thrd)); \ 639 (thrd)->locklevel--; \ 640 _thr_ast(thrd); \ 641 } while (0) 642 643 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 644 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 645 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 646 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 647 648 #define THREAD_LIST_RDLOCK(curthrd) \ 649 do { \ 650 (curthrd)->locklevel++; \ 651 _thr_rwl_rdlock(&_thr_list_lock); \ 652 } while (0) 653 654 #define THREAD_LIST_WRLOCK(curthrd) \ 655 do { \ 656 (curthrd)->locklevel++; \ 657 _thr_rwl_wrlock(&_thr_list_lock); \ 658 } while (0) 659 660 #define THREAD_LIST_UNLOCK(curthrd) \ 661 do { \ 662 _thr_rwl_unlock(&_thr_list_lock); \ 663 (curthrd)->locklevel--; \ 664 _thr_ast(curthrd); \ 665 } while (0) 666 667 /* 668 * Macros to insert/remove threads to the all thread list and 669 * the gc list. 670 */ 671 #define THR_LIST_ADD(thrd) do { \ 672 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 673 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 674 _thr_hash_add(thrd); \ 675 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 676 } \ 677 } while (0) 678 #define THR_LIST_REMOVE(thrd) do { \ 679 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 680 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 681 _thr_hash_remove(thrd); \ 682 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 683 } \ 684 } while (0) 685 #define THR_GCLIST_ADD(thrd) do { \ 686 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 687 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 688 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 689 _gc_count++; \ 690 } \ 691 } while (0) 692 #define THR_GCLIST_REMOVE(thrd) do { \ 693 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 694 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 695 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 696 _gc_count--; \ 697 } \ 698 } while (0) 699 700 #define THR_REF_ADD(curthread, pthread) { \ 701 THR_CRITICAL_ENTER(curthread); \ 702 pthread->refcount++; \ 703 } while (0) 704 705 #define THR_REF_DEL(curthread, pthread) { \ 706 pthread->refcount--; \ 707 THR_CRITICAL_LEAVE(curthread); \ 708 } while (0) 709 710 #define GC_NEEDED() (_gc_count >= 5) 711 712 #define SHOULD_REPORT_EVENT(curthr, e) \ 713 (curthr->report_events && \ 714 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 715 716 #ifndef __LIBC_ISTHREADED_DECLARED 717 #define __LIBC_ISTHREADED_DECLARED 718 extern int __isthreaded; 719 #endif 720 721 /* 722 * Global variables for the pthread kernel. 723 */ 724 725 extern char *_usrstack __hidden; 726 727 /* For debugger */ 728 extern int _libthr_debug; 729 extern int _thread_event_mask; 730 extern struct pthread *_thread_last_event; 731 /* Used in symbol lookup of libthread_db */ 732 extern struct pthread_key _thread_keytable[]; 733 734 /* List of all threads: */ 735 extern pthreadlist _thread_list; 736 737 /* List of threads needing GC: */ 738 extern pthreadlist _thread_gc_list __hidden; 739 740 extern int _thread_active_threads; 741 extern atfork_head _thr_atfork_list __hidden; 742 extern struct urwlock _thr_atfork_lock __hidden; 743 744 /* Default thread attributes: */ 745 extern struct pthread_attr _pthread_attr_default __hidden; 746 747 /* Default mutex attributes: */ 748 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 749 extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden; 750 751 /* Default condition variable attributes: */ 752 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 753 754 extern struct pthread_prio _thr_priorities[] __hidden; 755 756 extern int _thr_is_smp __hidden; 757 758 extern size_t _thr_guard_default __hidden; 759 extern size_t _thr_stack_default __hidden; 760 extern size_t _thr_stack_initial __hidden; 761 extern int _thr_page_size __hidden; 762 extern int _thr_spinloops __hidden; 763 extern int _thr_yieldloops __hidden; 764 extern int _thr_queuefifo __hidden; 765 766 /* Garbage thread count. */ 767 extern int _gc_count __hidden; 768 769 extern struct umutex _mutex_static_lock __hidden; 770 extern struct umutex _cond_static_lock __hidden; 771 extern struct umutex _rwlock_static_lock __hidden; 772 extern struct umutex _keytable_lock __hidden; 773 extern struct urwlock _thr_list_lock __hidden; 774 extern struct umutex _thr_event_lock __hidden; 775 extern struct umutex _suspend_all_lock __hidden; 776 extern int _suspend_all_waiters __hidden; 777 extern int _suspend_all_cycle __hidden; 778 extern struct pthread *_single_thread __hidden; 779 780 extern bool _thr_after_fork __hidden; 781 782 /* 783 * Function prototype definitions. 784 */ 785 __BEGIN_DECLS 786 void _thr_setthreaded(int) __hidden; 787 int _mutex_cv_lock(struct pthread_mutex *, int, bool) __hidden; 788 int _mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden; 789 int _mutex_cv_attach(struct pthread_mutex *, int) __hidden; 790 int _mutex_cv_detach(struct pthread_mutex *, int *) __hidden; 791 int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden; 792 int _mutex_reinit(pthread_mutex_t *) __hidden; 793 void _mutex_fork(struct pthread *curthread) __hidden; 794 int _mutex_enter_robust(struct pthread *curthread, struct pthread_mutex *m) 795 __hidden; 796 void _mutex_leave_robust(struct pthread *curthread, struct pthread_mutex *m) 797 __hidden; 798 void _libpthread_init(struct pthread *) __hidden; 799 struct pthread *_thr_alloc(struct pthread *) __hidden; 800 void _thread_exit(const char *, int, const char *) __hidden __dead2; 801 void _thread_exitf(const char *, int, const char *, ...) __hidden __dead2 802 __printflike(3, 4); 803 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 804 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 805 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 806 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 807 void _thr_rtld_init(void) __hidden; 808 void _thr_rtld_postfork_child(void) __hidden; 809 int _thr_stack_alloc(struct pthread_attr *) __hidden; 810 void _thr_stack_free(struct pthread_attr *) __hidden; 811 void _thr_free(struct pthread *, struct pthread *) __hidden; 812 void _thr_gc(struct pthread *) __hidden; 813 void _thread_cleanupspecific(void) __hidden; 814 void _thread_printf(int, const char *, ...) __hidden __printflike(2, 3); 815 void _thread_vprintf(int, const char *, va_list) __hidden; 816 void _thr_spinlock_init(void) __hidden; 817 void _thr_cancel_enter(struct pthread *) __hidden; 818 void _thr_cancel_enter2(struct pthread *, int) __hidden; 819 void _thr_cancel_leave(struct pthread *, int) __hidden; 820 void _thr_testcancel(struct pthread *) __hidden; 821 void _thr_signal_block(struct pthread *) __hidden; 822 void _thr_signal_unblock(struct pthread *) __hidden; 823 void _thr_signal_block_check_fast(void) __hidden; 824 void _thr_signal_block_setup(struct pthread *) __hidden; 825 void _thr_signal_init(int) __hidden; 826 void _thr_signal_deinit(void) __hidden; 827 int _thr_send_sig(struct pthread *, int sig) __hidden; 828 void _thr_list_init(void) __hidden; 829 void _thr_hash_add(struct pthread *) __hidden; 830 void _thr_hash_remove(struct pthread *) __hidden; 831 struct pthread *_thr_hash_find(struct pthread *) __hidden; 832 void _thr_link(struct pthread *, struct pthread *) __hidden; 833 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 834 void _thr_assert_lock_level(void) __hidden __dead2; 835 void _thr_ast(struct pthread *) __hidden; 836 void _thr_report_creation(struct pthread *curthread, 837 struct pthread *newthread) __hidden; 838 void _thr_report_death(struct pthread *curthread) __hidden; 839 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 840 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 841 void _thr_signal_prefork(void) __hidden; 842 void _thr_signal_postfork(void) __hidden; 843 void _thr_signal_postfork_child(void) __hidden; 844 void _thr_suspend_all_lock(struct pthread *) __hidden; 845 void _thr_suspend_all_unlock(struct pthread *) __hidden; 846 void _thr_suspend_all_np(void) __hidden; 847 void _thr_resume_all_np(void) __hidden; 848 void _thr_try_gc(struct pthread *, struct pthread *) __hidden; 849 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 850 struct sched_param *param) __hidden; 851 int _schedparam_to_rtp(int policy, const struct sched_param *param, 852 struct rtprio *rtp) __hidden; 853 void _thread_bp_create(void); 854 void _thread_bp_death(void); 855 int _sched_yield(void); 856 857 void _pthread_cleanup_push(void (*)(void *), void *); 858 void _pthread_cleanup_pop(int); 859 void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden; 860 #ifndef _LIBC_PRIVATE_H_ 861 void _pthread_cancel_enter(int maycancel); 862 void _pthread_cancel_leave(int maycancel); 863 #endif 864 int _pthread_mutex_consistent(pthread_mutex_t * _Nonnull); 865 int _pthread_mutexattr_getrobust(pthread_mutexattr_t * _Nonnull __restrict, 866 int * _Nonnull __restrict); 867 int _pthread_mutexattr_setrobust(pthread_mutexattr_t * _Nonnull, int); 868 869 /* #include <fcntl.h> */ 870 #ifdef _SYS_FCNTL_H_ 871 #ifndef _LIBC_PRIVATE_H_ 872 int __sys_fcntl(int, int, intptr_t); 873 int __sys_openat(int, const char *, int, int); 874 #endif /* _LIBC_PRIVATE_H_ */ 875 #endif /* _SYS_FCNTL_H_ */ 876 877 /* #include <signal.h> */ 878 #ifdef _SIGNAL_H_ 879 #ifndef _LIBC_PRIVATE_H_ 880 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 881 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 882 int __sys_sigsuspend(const sigset_t *); 883 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 884 const struct timespec *); 885 int __sys_sigwait(const sigset_t *, int *); 886 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 887 #endif /* _LIBC_PRIVATE_H_ */ 888 #endif /* _SYS_FCNTL_H_ */ 889 890 /* #include <time.h> */ 891 #ifdef _TIME_H_ 892 #ifndef _LIBC_PRIVATE_H_ 893 int __sys_clock_nanosleep(clockid_t, int, const struct timespec *, 894 struct timespec *); 895 int __sys_nanosleep(const struct timespec *, struct timespec *); 896 #endif /* _LIBC_PRIVATE_H_ */ 897 #endif /* _SYS_FCNTL_H_ */ 898 899 /* #include <sys/ucontext.h> */ 900 #ifdef _SYS_UCONTEXT_H_ 901 #ifndef _LIBC_PRIVATE_H_ 902 int __sys_setcontext(const ucontext_t *ucp); 903 int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 904 #endif /* _LIBC_PRIVATE_H_ */ 905 #endif /* _SYS_FCNTL_H_ */ 906 907 /* #include <unistd.h> */ 908 #ifdef _UNISTD_H_ 909 #ifndef _LIBC_PRIVATE_H_ 910 int __sys_close(int); 911 int __sys_fork(void); 912 ssize_t __sys_read(int, void *, size_t); 913 #endif /* _LIBC_PRIVATE_H_ */ 914 #endif /* _SYS_FCNTL_H_ */ 915 916 static inline int 917 _thr_isthreaded(void) 918 { 919 return (__isthreaded != 0); 920 } 921 922 static inline int 923 _thr_is_inited(void) 924 { 925 return (_thr_initial != NULL); 926 } 927 928 static inline void 929 _thr_check_init(void) 930 { 931 if (_thr_initial == NULL) 932 _libpthread_init(NULL); 933 } 934 935 struct wake_addr *_thr_alloc_wake_addr(void); 936 void _thr_release_wake_addr(struct wake_addr *); 937 int _thr_sleep(struct pthread *, int, const struct timespec *); 938 939 void _thr_wake_addr_init(void) __hidden; 940 941 static inline void 942 _thr_clear_wake(struct pthread *td) 943 { 944 td->wake_addr->value = 0; 945 } 946 947 static inline int 948 _thr_is_woken(struct pthread *td) 949 { 950 return td->wake_addr->value != 0; 951 } 952 953 static inline void 954 _thr_set_wake(unsigned int *waddr) 955 { 956 *waddr = 1; 957 _thr_umtx_wake(waddr, INT_MAX, 0); 958 } 959 960 void _thr_wake_all(unsigned int *waddrs[], int) __hidden; 961 962 static inline struct pthread * 963 _sleepq_first(struct sleepqueue *sq) 964 { 965 return TAILQ_FIRST(&sq->sq_blocked); 966 } 967 968 void _sleepq_init(void) __hidden; 969 struct sleepqueue *_sleepq_alloc(void) __hidden; 970 void _sleepq_free(struct sleepqueue *) __hidden; 971 void _sleepq_lock(void *) __hidden; 972 void _sleepq_unlock(void *) __hidden; 973 struct sleepqueue *_sleepq_lookup(void *) __hidden; 974 void _sleepq_add(void *, struct pthread *) __hidden; 975 int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden; 976 void _sleepq_drop(struct sleepqueue *, 977 void (*cb)(struct pthread *, void *arg), void *) __hidden; 978 979 int _pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex, 980 void *(calloc_cb)(size_t, size_t)); 981 982 struct dl_phdr_info; 983 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info); 984 void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden; 985 void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden; 986 void _thr_stack_fix_protection(struct pthread *thrd); 987 void __pthread_distribute_static_tls(size_t offset, void *src, size_t len, 988 size_t total_len); 989 990 int *__error_threaded(void) __hidden; 991 void __thr_interpose_libc(void) __hidden; 992 pid_t __thr_fork(void); 993 pid_t __thr_pdfork(int *, int); 994 int __thr_setcontext(const ucontext_t *ucp); 995 int __thr_sigaction(int sig, const struct sigaction *act, 996 struct sigaction *oact) __hidden; 997 int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset); 998 int __thr_sigsuspend(const sigset_t * set); 999 int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info, 1000 const struct timespec * timeout); 1001 int __thr_sigwait(const sigset_t *set, int *sig); 1002 int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info); 1003 int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 1004 1005 void __thr_map_stacks_exec(void); 1006 1007 struct _spinlock; 1008 void __thr_spinunlock(struct _spinlock *lck); 1009 void __thr_spinlock(struct _spinlock *lck); 1010 1011 struct tcb *_tcb_ctor(struct pthread *, int); 1012 void _tcb_dtor(struct tcb *); 1013 1014 void __thr_pshared_init(void) __hidden; 1015 void *__thr_pshared_offpage(void *key, int doalloc) __hidden; 1016 void __thr_pshared_destroy(void *key) __hidden; 1017 void __thr_pshared_atfork_pre(void) __hidden; 1018 void __thr_pshared_atfork_post(void) __hidden; 1019 1020 void *__thr_aligned_alloc_offset(size_t align, size_t size, size_t offset); 1021 void *__thr_calloc(size_t num, size_t size); 1022 void __thr_free(void *cp); 1023 void *__thr_malloc(size_t nbytes); 1024 void *__thr_realloc(void *cp, size_t nbytes); 1025 void __thr_malloc_init(void); 1026 void __thr_malloc_prefork(struct pthread *curthread); 1027 void __thr_malloc_postfork(struct pthread *curthread); 1028 1029 int _thr_join(pthread_t, void **); 1030 int _Tthr_kill(pthread_t, int); 1031 int _thr_getthreadid_np(void); 1032 void __thr_cleanup_push_imp(void (*)(void *), void *, 1033 struct _pthread_cleanup_info *); 1034 void __thr_cleanup_pop_imp(int); 1035 void _thr_cleanup_push(void (*)(void *), void *); 1036 void _thr_cleanup_pop(int); 1037 void _Tthr_testcancel(void); 1038 void _Tthr_cancel_enter(int); 1039 void _Tthr_cancel_leave(int); 1040 int _thr_cancel(pthread_t); 1041 int _thr_atfork(void (*)(void), void (*)(void), void (*)(void)); 1042 int _thr_attr_destroy(pthread_attr_t *); 1043 int _thr_attr_get_np(pthread_t, pthread_attr_t *); 1044 int _thr_attr_getdetachstate(const pthread_attr_t *, int *); 1045 int _thr_attr_getguardsize(const pthread_attr_t * __restrict, 1046 size_t * __restrict); 1047 int _thr_attr_getinheritsched(const pthread_attr_t * __restrict, 1048 int * __restrict); 1049 int _thr_attr_getschedparam(const pthread_attr_t * __restrict, 1050 struct sched_param * __restrict); 1051 int _thr_attr_getschedpolicy(const pthread_attr_t * __restrict, 1052 int * __restrict); 1053 int _thr_attr_getscope(const pthread_attr_t * __restrict, int * __restrict); 1054 int _thr_attr_getstackaddr(const pthread_attr_t *, void **); 1055 int _thr_attr_getstacksize(const pthread_attr_t * __restrict, 1056 size_t * __restrict); 1057 int _thr_attr_init(pthread_attr_t *); 1058 int _thr_attr_setdetachstate(pthread_attr_t *, int); 1059 int _thr_attr_setguardsize(pthread_attr_t *, size_t); 1060 int _thr_attr_setinheritsched(pthread_attr_t *, int); 1061 int _thr_attr_setschedparam(pthread_attr_t * __restrict, 1062 const struct sched_param * __restrict); 1063 int _thr_attr_setschedpolicy(pthread_attr_t *, int); 1064 int _thr_attr_setscope(pthread_attr_t *, int); 1065 int _thr_attr_setstackaddr(pthread_attr_t *, void *); 1066 int _thr_attr_setstacksize(pthread_attr_t *, size_t); 1067 int _thr_cond_init(pthread_cond_t * __restrict, 1068 const pthread_condattr_t * __restrict); 1069 int _thr_cond_destroy(pthread_cond_t *); 1070 int _thr_cond_timedwait(pthread_cond_t * __restrict, 1071 pthread_mutex_t * __restrict, const struct timespec * __restrict); 1072 int _thr_cond_signal(pthread_cond_t * cond); 1073 int _thr_cond_broadcast(pthread_cond_t * cond); 1074 int __thr_cond_wait(pthread_cond_t *, pthread_mutex_t *); 1075 int _thr_cond_wait(pthread_cond_t *, pthread_mutex_t *); 1076 int _thr_detach(pthread_t); 1077 int _thr_equal(pthread_t, pthread_t); 1078 void _Tthr_exit(void *); 1079 int _thr_getname_np(pthread_t, char *, size_t); 1080 int _thr_key_create(pthread_key_t *, void (*)(void *)); 1081 int _thr_key_delete(pthread_key_t); 1082 int _thr_setspecific(pthread_key_t, const void *); 1083 void *_thr_getspecific(pthread_key_t); 1084 int _thr_setcancelstate(int, int *); 1085 int _thr_setcanceltype(int, int *); 1086 pthread_t _Tthr_self(void); 1087 int _thr_rwlock_init(pthread_rwlock_t *, const pthread_rwlockattr_t *); 1088 int _thr_rwlock_destroy(pthread_rwlock_t *); 1089 int _Tthr_rwlock_rdlock(pthread_rwlock_t *); 1090 int _Tthr_rwlock_tryrdlock(pthread_rwlock_t *); 1091 int _Tthr_rwlock_trywrlock(pthread_rwlock_t *); 1092 int _Tthr_rwlock_wrlock(pthread_rwlock_t *); 1093 int _Tthr_rwlock_unlock(pthread_rwlock_t *); 1094 int _thr_once(pthread_once_t *, void (*)(void)); 1095 int _thr_sigmask(int, const sigset_t *, sigset_t *); 1096 int _thr_main_np(void); 1097 int _thr_mutexattr_init(pthread_mutexattr_t *); 1098 int _thr_mutexattr_destroy(pthread_mutexattr_t *); 1099 int _thr_mutexattr_settype(pthread_mutexattr_t *, int); 1100 int _thr_mutexattr_getrobust(pthread_mutexattr_t *, int *); 1101 int _thr_mutexattr_setrobust(pthread_mutexattr_t *, int); 1102 int __Tthr_mutex_init(pthread_mutex_t * __restrict, 1103 const pthread_mutexattr_t * __restrict); 1104 int _Tthr_mutex_consistent(pthread_mutex_t *); 1105 int _thr_mutex_destroy(pthread_mutex_t *); 1106 int _thr_mutex_unlock(pthread_mutex_t *); 1107 int __Tthr_mutex_lock(pthread_mutex_t *); 1108 int __Tthr_mutex_trylock(pthread_mutex_t *); 1109 bool __thr_get_main_stack_base(char **base); 1110 bool __thr_get_main_stack_lim(size_t *lim); 1111 int _Tthr_sigqueue(pthread_t pthread, int sig, const union sigval value); 1112 void _thr_resolve_machdep(void); 1113 1114 __END_DECLS 1115 __NULLABILITY_PRAGMA_POP 1116 1117 #endif /* !_THR_PRIVATE_H */ 1118