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