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