1 /* 2 * Copyright (C) 2005 Daniel M. Eischen <deischen@freebsd.org> 3 * Copyright (c) 2005 David Xu <davidxu@freebsd.org> 4 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>. 5 * 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 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/cdefs.h> 41 #include <sys/queue.h> 42 #include <sys/param.h> 43 #include <sys/cpuset.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 #define pthread_attr_start_copy sched_policy 265 int sched_policy; 266 int sched_inherit; 267 int prio; 268 int suspend; 269 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 270 int flags; 271 void *stackaddr_attr; 272 size_t stacksize_attr; 273 size_t guardsize_attr; 274 #define pthread_attr_end_copy cpuset 275 cpuset_t *cpuset; 276 size_t cpusetsize; 277 }; 278 279 struct wake_addr { 280 struct wake_addr *link; 281 unsigned int value; 282 char pad[12]; 283 }; 284 285 struct sleepqueue { 286 TAILQ_HEAD(, pthread) sq_blocked; 287 SLIST_HEAD(, sleepqueue) sq_freeq; 288 LIST_ENTRY(sleepqueue) sq_hash; 289 SLIST_ENTRY(sleepqueue) sq_flink; 290 void *sq_wchan; 291 int sq_type; 292 }; 293 294 /* 295 * Thread creation state attributes. 296 */ 297 #define THR_CREATE_RUNNING 0 298 #define THR_CREATE_SUSPENDED 1 299 300 /* 301 * Miscellaneous definitions. 302 */ 303 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 304 305 /* 306 * Maximum size of initial thread's stack. This perhaps deserves to be larger 307 * than the stacks of other threads, since many applications are likely to run 308 * almost entirely on this stack. 309 */ 310 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 311 312 /* 313 * Define priorities returned by kernel. 314 */ 315 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) 316 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) 317 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) 318 319 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) 320 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) 321 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) 322 323 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ 324 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) 325 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) 326 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) 327 328 struct pthread_prio { 329 int pri_min; 330 int pri_max; 331 int pri_default; 332 }; 333 334 struct pthread_rwlockattr { 335 int pshared; 336 }; 337 338 struct pthread_rwlock { 339 struct urwlock lock; 340 uint32_t owner; 341 }; 342 343 /* 344 * Thread states. 345 */ 346 enum pthread_state { 347 PS_RUNNING, 348 PS_DEAD 349 }; 350 351 struct pthread_specific_elem { 352 const void *data; 353 int seqno; 354 }; 355 356 struct pthread_key { 357 volatile int allocated; 358 int seqno; 359 void (*destructor)(void *); 360 }; 361 362 /* 363 * lwpid_t is 32bit but kernel thr API exports tid as long type 364 * to preserve the ABI for M:N model in very early date (r131431). 365 */ 366 #define TID(thread) ((uint32_t) ((thread)->tid)) 367 368 /* 369 * Thread structure. 370 */ 371 struct pthread { 372 #define _pthread_startzero tid 373 /* Kernel thread id. */ 374 long tid; 375 #define TID_TERMINATED 1 376 377 /* 378 * Lock for accesses to this thread structure. 379 */ 380 struct umutex lock; 381 382 /* Internal condition variable cycle number. */ 383 uint32_t cycle; 384 385 /* How many low level locks the thread held. */ 386 int locklevel; 387 388 /* 389 * Set to non-zero when this thread has entered a critical 390 * region. We allow for recursive entries into critical regions. 391 */ 392 int critical_count; 393 394 /* Signal blocked counter. */ 395 int sigblock; 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 }; 574 575 #define THR_SHOULD_GC(thrd) \ 576 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \ 577 ((thrd)->flags & THR_FLAGS_DETACHED) != 0) 578 579 #define THR_IN_CRITICAL(thrd) \ 580 (((thrd)->locklevel > 0) || \ 581 ((thrd)->critical_count > 0)) 582 583 #define THR_CRITICAL_ENTER(thrd) \ 584 (thrd)->critical_count++ 585 586 #define THR_CRITICAL_LEAVE(thrd) \ 587 do { \ 588 (thrd)->critical_count--; \ 589 _thr_ast(thrd); \ 590 } while (0) 591 592 #define THR_UMUTEX_TRYLOCK(thrd, lck) \ 593 _thr_umutex_trylock((lck), TID(thrd)) 594 595 #define THR_UMUTEX_LOCK(thrd, lck) \ 596 _thr_umutex_lock((lck), TID(thrd)) 597 598 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 599 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 600 601 #define THR_UMUTEX_UNLOCK(thrd, lck) \ 602 _thr_umutex_unlock((lck), TID(thrd)) 603 604 #define THR_LOCK_ACQUIRE(thrd, lck) \ 605 do { \ 606 (thrd)->locklevel++; \ 607 _thr_umutex_lock(lck, TID(thrd)); \ 608 } while (0) 609 610 #define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \ 611 do { \ 612 (thrd)->locklevel++; \ 613 _thr_umutex_lock_spin(lck, TID(thrd)); \ 614 } while (0) 615 616 #ifdef _PTHREADS_INVARIANTS 617 #define THR_ASSERT_LOCKLEVEL(thrd) \ 618 do { \ 619 if (__predict_false((thrd)->locklevel <= 0)) \ 620 _thr_assert_lock_level(); \ 621 } while (0) 622 #else 623 #define THR_ASSERT_LOCKLEVEL(thrd) 624 #endif 625 626 #define THR_LOCK_RELEASE(thrd, lck) \ 627 do { \ 628 THR_ASSERT_LOCKLEVEL(thrd); \ 629 _thr_umutex_unlock((lck), TID(thrd)); \ 630 (thrd)->locklevel--; \ 631 _thr_ast(thrd); \ 632 } while (0) 633 634 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 635 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 636 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 637 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 638 639 #define THREAD_LIST_RDLOCK(curthrd) \ 640 do { \ 641 (curthrd)->locklevel++; \ 642 _thr_rwl_rdlock(&_thr_list_lock); \ 643 } while (0) 644 645 #define THREAD_LIST_WRLOCK(curthrd) \ 646 do { \ 647 (curthrd)->locklevel++; \ 648 _thr_rwl_wrlock(&_thr_list_lock); \ 649 } while (0) 650 651 #define THREAD_LIST_UNLOCK(curthrd) \ 652 do { \ 653 _thr_rwl_unlock(&_thr_list_lock); \ 654 (curthrd)->locklevel--; \ 655 _thr_ast(curthrd); \ 656 } while (0) 657 658 /* 659 * Macros to insert/remove threads to the all thread list and 660 * the gc list. 661 */ 662 #define THR_LIST_ADD(thrd) do { \ 663 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 664 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 665 _thr_hash_add(thrd); \ 666 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 667 } \ 668 } while (0) 669 #define THR_LIST_REMOVE(thrd) do { \ 670 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 671 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 672 _thr_hash_remove(thrd); \ 673 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 674 } \ 675 } while (0) 676 #define THR_GCLIST_ADD(thrd) do { \ 677 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 678 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 679 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 680 _gc_count++; \ 681 } \ 682 } while (0) 683 #define THR_GCLIST_REMOVE(thrd) do { \ 684 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 685 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 686 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 687 _gc_count--; \ 688 } \ 689 } while (0) 690 691 #define THR_REF_ADD(curthread, pthread) { \ 692 THR_CRITICAL_ENTER(curthread); \ 693 pthread->refcount++; \ 694 } while (0) 695 696 #define THR_REF_DEL(curthread, pthread) { \ 697 pthread->refcount--; \ 698 THR_CRITICAL_LEAVE(curthread); \ 699 } while (0) 700 701 #define GC_NEEDED() (_gc_count >= 5) 702 703 #define SHOULD_REPORT_EVENT(curthr, e) \ 704 (curthr->report_events && \ 705 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 706 707 #ifndef __LIBC_ISTHREADED_DECLARED 708 #define __LIBC_ISTHREADED_DECLARED 709 extern int __isthreaded; 710 #endif 711 712 /* 713 * Global variables for the pthread kernel. 714 */ 715 716 extern char *_usrstack __hidden; 717 718 /* For debugger */ 719 extern int _libthr_debug; 720 extern int _thread_event_mask; 721 extern struct pthread *_thread_last_event; 722 723 /* List of all threads: */ 724 extern pthreadlist _thread_list; 725 726 /* List of threads needing GC: */ 727 extern pthreadlist _thread_gc_list __hidden; 728 729 extern int _thread_active_threads; 730 extern atfork_head _thr_atfork_list __hidden; 731 extern struct urwlock _thr_atfork_lock __hidden; 732 733 /* Default thread attributes: */ 734 extern struct pthread_attr _pthread_attr_default __hidden; 735 736 /* Default mutex attributes: */ 737 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 738 extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden; 739 740 /* Default condition variable attributes: */ 741 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 742 743 extern struct pthread_prio _thr_priorities[] __hidden; 744 745 extern int _thr_is_smp __hidden; 746 747 extern size_t _thr_guard_default __hidden; 748 extern size_t _thr_stack_default __hidden; 749 extern size_t _thr_stack_initial __hidden; 750 extern int _thr_page_size __hidden; 751 extern int _thr_spinloops __hidden; 752 extern int _thr_yieldloops __hidden; 753 extern int _thr_queuefifo __hidden; 754 755 /* Garbage thread count. */ 756 extern int _gc_count __hidden; 757 758 extern struct umutex _mutex_static_lock __hidden; 759 extern struct umutex _cond_static_lock __hidden; 760 extern struct umutex _rwlock_static_lock __hidden; 761 extern struct umutex _keytable_lock __hidden; 762 extern struct urwlock _thr_list_lock __hidden; 763 extern struct umutex _thr_event_lock __hidden; 764 extern struct umutex _suspend_all_lock __hidden; 765 extern int _suspend_all_waiters __hidden; 766 extern int _suspend_all_cycle __hidden; 767 extern struct pthread *_single_thread __hidden; 768 769 /* 770 * Function prototype definitions. 771 */ 772 __BEGIN_DECLS 773 int _thr_setthreaded(int) __hidden; 774 int _mutex_cv_lock(struct pthread_mutex *, int, bool) __hidden; 775 int _mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden; 776 int _mutex_cv_attach(struct pthread_mutex *, int) __hidden; 777 int _mutex_cv_detach(struct pthread_mutex *, int *) __hidden; 778 int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden; 779 int _mutex_reinit(pthread_mutex_t *) __hidden; 780 void _mutex_fork(struct pthread *curthread) __hidden; 781 int _mutex_enter_robust(struct pthread *curthread, struct pthread_mutex *m) 782 __hidden; 783 void _mutex_leave_robust(struct pthread *curthread, struct pthread_mutex *m) 784 __hidden; 785 void _libpthread_init(struct pthread *) __hidden; 786 struct pthread *_thr_alloc(struct pthread *) __hidden; 787 void _thread_exit(const char *, int, const char *) __hidden __dead2; 788 void _thread_exitf(const char *, int, const char *, ...) __hidden __dead2 789 __printflike(3, 4); 790 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 791 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 792 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 793 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 794 void _thr_rtld_init(void) __hidden; 795 void _thr_rtld_postfork_child(void) __hidden; 796 int _thr_stack_alloc(struct pthread_attr *) __hidden; 797 void _thr_stack_free(struct pthread_attr *) __hidden; 798 void _thr_free(struct pthread *, struct pthread *) __hidden; 799 void _thr_gc(struct pthread *) __hidden; 800 void _thread_cleanupspecific(void) __hidden; 801 void _thread_printf(int, const char *, ...) __hidden __printflike(2, 3); 802 void _thread_vprintf(int, const char *, va_list) __hidden; 803 void _thr_spinlock_init(void) __hidden; 804 void _thr_cancel_enter(struct pthread *) __hidden; 805 void _thr_cancel_enter2(struct pthread *, int) __hidden; 806 void _thr_cancel_leave(struct pthread *, int) __hidden; 807 void _thr_testcancel(struct pthread *) __hidden; 808 void _thr_signal_block(struct pthread *) __hidden; 809 void _thr_signal_unblock(struct pthread *) __hidden; 810 void _thr_signal_init(int) __hidden; 811 void _thr_signal_deinit(void) __hidden; 812 int _thr_send_sig(struct pthread *, int sig) __hidden; 813 void _thr_list_init(void) __hidden; 814 void _thr_hash_add(struct pthread *) __hidden; 815 void _thr_hash_remove(struct pthread *) __hidden; 816 struct pthread *_thr_hash_find(struct pthread *) __hidden; 817 void _thr_link(struct pthread *, struct pthread *) __hidden; 818 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 819 void _thr_assert_lock_level(void) __hidden __dead2; 820 void _thr_ast(struct pthread *) __hidden; 821 void _thr_report_creation(struct pthread *curthread, 822 struct pthread *newthread) __hidden; 823 void _thr_report_death(struct pthread *curthread) __hidden; 824 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 825 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 826 void _thr_signal_prefork(void) __hidden; 827 void _thr_signal_postfork(void) __hidden; 828 void _thr_signal_postfork_child(void) __hidden; 829 void _thr_suspend_all_lock(struct pthread *) __hidden; 830 void _thr_suspend_all_unlock(struct pthread *) __hidden; 831 void _thr_try_gc(struct pthread *, struct pthread *) __hidden; 832 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 833 struct sched_param *param) __hidden; 834 int _schedparam_to_rtp(int policy, const struct sched_param *param, 835 struct rtprio *rtp) __hidden; 836 void _thread_bp_create(void); 837 void _thread_bp_death(void); 838 int _sched_yield(void); 839 840 void _pthread_cleanup_push(void (*)(void *), void *); 841 void _pthread_cleanup_pop(int); 842 void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden; 843 #ifndef _LIBC_PRIVATE_H_ 844 void _pthread_cancel_enter(int maycancel); 845 void _pthread_cancel_leave(int maycancel); 846 #endif 847 int _pthread_mutex_consistent(pthread_mutex_t * _Nonnull); 848 int _pthread_mutexattr_getrobust(pthread_mutexattr_t * _Nonnull __restrict, 849 int * _Nonnull __restrict); 850 int _pthread_mutexattr_setrobust(pthread_mutexattr_t * _Nonnull, int); 851 852 /* #include <fcntl.h> */ 853 #ifdef _SYS_FCNTL_H_ 854 #ifndef _LIBC_PRIVATE_H_ 855 int __sys_fcntl(int, int, ...); 856 int __sys_openat(int, const char *, int, ...); 857 #endif /* _LIBC_PRIVATE_H_ */ 858 #endif /* _SYS_FCNTL_H_ */ 859 860 /* #include <signal.h> */ 861 #ifdef _SIGNAL_H_ 862 int __sys_kill(pid_t, int); 863 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 864 int __sys_sigpending(sigset_t *); 865 int __sys_sigreturn(const ucontext_t *); 866 #ifndef _LIBC_PRIVATE_H_ 867 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 868 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 869 int __sys_sigsuspend(const sigset_t *); 870 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 871 const struct timespec *); 872 int __sys_sigwait(const sigset_t *, int *); 873 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 874 #endif /* _LIBC_PRIVATE_H_ */ 875 #endif /* _SYS_FCNTL_H_ */ 876 877 /* #include <time.h> */ 878 #ifdef _TIME_H_ 879 #ifndef _LIBC_PRIVATE_H_ 880 int __sys_clock_nanosleep(clockid_t, int, const struct timespec *, 881 struct timespec *); 882 int __sys_nanosleep(const struct timespec *, struct timespec *); 883 #endif /* _LIBC_PRIVATE_H_ */ 884 #endif /* _SYS_FCNTL_H_ */ 885 886 /* #include <sys/ucontext.h> */ 887 #ifdef _SYS_UCONTEXT_H_ 888 #ifndef _LIBC_PRIVATE_H_ 889 int __sys_setcontext(const ucontext_t *ucp); 890 int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 891 #endif /* _LIBC_PRIVATE_H_ */ 892 #endif /* _SYS_FCNTL_H_ */ 893 894 /* #include <unistd.h> */ 895 #ifdef _UNISTD_H_ 896 void __sys_exit(int); 897 pid_t __sys_getpid(void); 898 #ifndef _LIBC_PRIVATE_H_ 899 int __sys_close(int); 900 int __sys_fork(void); 901 ssize_t __sys_read(int, void *, size_t); 902 #endif /* _LIBC_PRIVATE_H_ */ 903 #endif /* _SYS_FCNTL_H_ */ 904 905 static inline int 906 _thr_isthreaded(void) 907 { 908 return (__isthreaded != 0); 909 } 910 911 static inline int 912 _thr_is_inited(void) 913 { 914 return (_thr_initial != NULL); 915 } 916 917 static inline void 918 _thr_check_init(void) 919 { 920 if (_thr_initial == NULL) 921 _libpthread_init(NULL); 922 } 923 924 struct wake_addr *_thr_alloc_wake_addr(void); 925 void _thr_release_wake_addr(struct wake_addr *); 926 int _thr_sleep(struct pthread *, int, const struct timespec *); 927 928 void _thr_wake_addr_init(void) __hidden; 929 930 static inline void 931 _thr_clear_wake(struct pthread *td) 932 { 933 td->wake_addr->value = 0; 934 } 935 936 static inline int 937 _thr_is_woken(struct pthread *td) 938 { 939 return td->wake_addr->value != 0; 940 } 941 942 static inline void 943 _thr_set_wake(unsigned int *waddr) 944 { 945 *waddr = 1; 946 _thr_umtx_wake(waddr, INT_MAX, 0); 947 } 948 949 void _thr_wake_all(unsigned int *waddrs[], int) __hidden; 950 951 static inline struct pthread * 952 _sleepq_first(struct sleepqueue *sq) 953 { 954 return TAILQ_FIRST(&sq->sq_blocked); 955 } 956 957 void _sleepq_init(void) __hidden; 958 struct sleepqueue *_sleepq_alloc(void) __hidden; 959 void _sleepq_free(struct sleepqueue *) __hidden; 960 void _sleepq_lock(void *) __hidden; 961 void _sleepq_unlock(void *) __hidden; 962 struct sleepqueue *_sleepq_lookup(void *) __hidden; 963 void _sleepq_add(void *, struct pthread *) __hidden; 964 int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden; 965 void _sleepq_drop(struct sleepqueue *, 966 void (*cb)(struct pthread *, void *arg), void *) __hidden; 967 968 int _pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex, 969 void *(calloc_cb)(size_t, size_t)); 970 971 struct dl_phdr_info; 972 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info); 973 void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden; 974 void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden; 975 void _thr_stack_fix_protection(struct pthread *thrd); 976 977 int *__error_threaded(void) __hidden; 978 void __thr_interpose_libc(void) __hidden; 979 pid_t __thr_fork(void); 980 int __thr_setcontext(const ucontext_t *ucp); 981 int __thr_sigaction(int sig, const struct sigaction *act, 982 struct sigaction *oact) __hidden; 983 int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset); 984 int __thr_sigsuspend(const sigset_t * set); 985 int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info, 986 const struct timespec * timeout); 987 int __thr_sigwait(const sigset_t *set, int *sig); 988 int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info); 989 int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 990 991 void __thr_map_stacks_exec(void); 992 993 struct _spinlock; 994 void __thr_spinunlock(struct _spinlock *lck); 995 void __thr_spinlock(struct _spinlock *lck); 996 997 struct tcb *_tcb_ctor(struct pthread *, int); 998 void _tcb_dtor(struct tcb *); 999 1000 void __thr_pshared_init(void) __hidden; 1001 void *__thr_pshared_offpage(void *key, int doalloc) __hidden; 1002 void __thr_pshared_destroy(void *key) __hidden; 1003 void __thr_pshared_atfork_pre(void) __hidden; 1004 void __thr_pshared_atfork_post(void) __hidden; 1005 1006 __END_DECLS 1007 __NULLABILITY_PRAGMA_POP 1008 1009 #endif /* !_THR_PRIVATE_H */ 1010