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 #include "pthread_md.h" 73 #include "thr_umtx.h" 74 #include "thread_db.h" 75 76 #ifdef _PTHREAD_FORCED_UNWIND 77 #define _BSD_SOURCE 78 #include <unwind.h> 79 #endif 80 81 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 82 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 83 TAILQ_HEAD(mutex_queue, pthread_mutex); 84 85 /* Signal to do cancellation */ 86 #define SIGCANCEL SIGTHR 87 88 /* 89 * Kernel fatal error handler macro. 90 */ 91 #define PANIC(args...) _thread_exitf(__FILE__, __LINE__, ##args) 92 93 /* Output debug messages like this: */ 94 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 95 #define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args) 96 97 #ifdef _PTHREADS_INVARIANTS 98 #define THR_ASSERT(cond, msg) do { \ 99 if (__predict_false(!(cond))) \ 100 PANIC(msg); \ 101 } while (0) 102 #else 103 #define THR_ASSERT(cond, msg) 104 #endif 105 106 #ifdef PIC 107 # define STATIC_LIB_REQUIRE(name) 108 #else 109 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name) 110 #endif 111 112 #define TIMESPEC_ADD(dst, src, val) \ 113 do { \ 114 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \ 115 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \ 116 if ((dst)->tv_nsec >= 1000000000) { \ 117 (dst)->tv_sec++; \ 118 (dst)->tv_nsec -= 1000000000; \ 119 } \ 120 } while (0) 121 122 #define TIMESPEC_SUB(dst, src, val) \ 123 do { \ 124 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ 125 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ 126 if ((dst)->tv_nsec < 0) { \ 127 (dst)->tv_sec--; \ 128 (dst)->tv_nsec += 1000000000; \ 129 } \ 130 } while (0) 131 132 /* Magic cookie set for shared pthread locks and cv's pointers */ 133 #define THR_PSHARED_PTR \ 134 ((void *)(uintptr_t)((1ULL << (NBBY * sizeof(long) - 1)) | 1)) 135 136 /* XXX These values should be same as those defined in pthread.h */ 137 #define THR_MUTEX_INITIALIZER ((struct pthread_mutex *)NULL) 138 #define THR_ADAPTIVE_MUTEX_INITIALIZER ((struct pthread_mutex *)1) 139 #define THR_MUTEX_DESTROYED ((struct pthread_mutex *)2) 140 #define THR_COND_INITIALIZER ((struct pthread_cond *)NULL) 141 #define THR_COND_DESTROYED ((struct pthread_cond *)1) 142 #define THR_RWLOCK_INITIALIZER ((struct pthread_rwlock *)NULL) 143 #define THR_RWLOCK_DESTROYED ((struct pthread_rwlock *)1) 144 145 #define PMUTEX_FLAG_TYPE_MASK 0x0ff 146 #define PMUTEX_FLAG_PRIVATE 0x100 147 #define PMUTEX_FLAG_DEFERRED 0x200 148 #define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK) 149 150 #define PMUTEX_OWNER_ID(m) ((m)->m_lock.m_owner & ~UMUTEX_CONTESTED) 151 152 #define MAX_DEFER_WAITERS 50 153 154 /* 155 * Values for pthread_mutex m_ps indicator. 156 */ 157 #define PMUTEX_INITSTAGE_ALLOC 0 158 #define PMUTEX_INITSTAGE_BUSY 1 159 #define PMUTEX_INITSTAGE_DONE 2 160 161 struct pthread_mutex { 162 /* 163 * Lock for accesses to this structure. 164 */ 165 struct umutex m_lock; 166 int m_flags; 167 int m_count; 168 int m_spinloops; 169 int m_yieldloops; 170 int m_ps; /* pshared init stage */ 171 /* 172 * Link for all mutexes a thread currently owns, of the same 173 * prio type. 174 */ 175 TAILQ_ENTRY(pthread_mutex) m_qe; 176 /* Link for all private mutexes a thread currently owns. */ 177 TAILQ_ENTRY(pthread_mutex) m_pqe; 178 struct pthread_mutex *m_rb_prev; 179 }; 180 181 struct pthread_mutex_attr { 182 enum pthread_mutextype m_type; 183 int m_protocol; 184 int m_ceiling; 185 int m_pshared; 186 int m_robust; 187 }; 188 189 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 190 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE, \ 191 PTHREAD_MUTEX_STALLED } 192 193 struct pthread_cond { 194 __uint32_t __has_user_waiters; 195 struct ucond kcond; 196 }; 197 198 struct pthread_cond_attr { 199 int c_pshared; 200 int c_clockid; 201 }; 202 203 struct pthread_barrier { 204 struct umutex b_lock; 205 struct ucond b_cv; 206 int64_t b_cycle; 207 int b_count; 208 int b_waiters; 209 int b_refcount; 210 int b_destroying; 211 }; 212 213 struct pthread_barrierattr { 214 int pshared; 215 }; 216 217 struct pthread_spinlock { 218 struct umutex s_lock; 219 }; 220 221 /* 222 * Flags for condition variables. 223 */ 224 #define COND_FLAGS_PRIVATE 0x01 225 #define COND_FLAGS_INITED 0x02 226 #define COND_FLAGS_BUSY 0x04 227 228 /* 229 * Cleanup definitions. 230 */ 231 struct pthread_cleanup { 232 struct pthread_cleanup *prev; 233 void (*routine)(void *); 234 void *routine_arg; 235 int onheap; 236 }; 237 238 #define THR_CLEANUP_PUSH(td, func, arg) { \ 239 struct pthread_cleanup __cup; \ 240 \ 241 __cup.routine = func; \ 242 __cup.routine_arg = arg; \ 243 __cup.onheap = 0; \ 244 __cup.prev = (td)->cleanup; \ 245 (td)->cleanup = &__cup; 246 247 #define THR_CLEANUP_POP(td, exec) \ 248 (td)->cleanup = __cup.prev; \ 249 if ((exec) != 0) \ 250 __cup.routine(__cup.routine_arg); \ 251 } 252 253 struct pthread_atfork { 254 TAILQ_ENTRY(pthread_atfork) qe; 255 void (*prepare)(void); 256 void (*parent)(void); 257 void (*child)(void); 258 }; 259 260 struct pthread_attr { 261 #define pthread_attr_start_copy sched_policy 262 int sched_policy; 263 int sched_inherit; 264 int prio; 265 int suspend; 266 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 267 int flags; 268 void *stackaddr_attr; 269 size_t stacksize_attr; 270 size_t guardsize_attr; 271 #define pthread_attr_end_copy cpuset 272 cpuset_t *cpuset; 273 size_t cpusetsize; 274 }; 275 276 struct wake_addr { 277 struct wake_addr *link; 278 unsigned int value; 279 char pad[12]; 280 }; 281 282 struct 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) 324 325 struct pthread_prio { 326 int pri_min; 327 int pri_max; 328 int pri_default; 329 }; 330 331 struct pthread_rwlockattr { 332 int pshared; 333 }; 334 335 struct pthread_rwlock { 336 struct urwlock lock; 337 uint32_t owner; 338 }; 339 340 /* 341 * Thread states. 342 */ 343 enum pthread_state { 344 PS_RUNNING, 345 PS_DEAD 346 }; 347 348 struct pthread_specific_elem { 349 const void *data; 350 int seqno; 351 }; 352 353 struct 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 */ 368 struct 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 /* Queue entry for list of all threads. */ 395 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 396 397 /* Queue entry for GC lists. */ 398 TAILQ_ENTRY(pthread) gcle; 399 400 /* Hash queue entry. */ 401 LIST_ENTRY(pthread) hle; 402 403 /* Sleep queue entry */ 404 TAILQ_ENTRY(pthread) wle; 405 406 /* Threads reference count. */ 407 int refcount; 408 409 /* 410 * Thread start routine, argument, stack pointer and thread 411 * attributes. 412 */ 413 void *(*start_routine)(void *); 414 void *arg; 415 struct pthread_attr attr; 416 417 #define SHOULD_CANCEL(thr) \ 418 ((thr)->cancel_pending && (thr)->cancel_enable && \ 419 (thr)->no_cancel == 0) 420 421 /* Cancellation is enabled */ 422 int cancel_enable; 423 424 /* Cancellation request is pending */ 425 int cancel_pending; 426 427 /* Thread is at cancellation point */ 428 int cancel_point; 429 430 /* Cancellation is temporarily disabled */ 431 int no_cancel; 432 433 /* Asynchronouse cancellation is enabled */ 434 int cancel_async; 435 436 /* Cancellation is in progress */ 437 int cancelling; 438 439 /* Thread temporary signal mask. */ 440 sigset_t sigmask; 441 442 /* Thread should unblock SIGCANCEL. */ 443 int unblock_sigcancel; 444 445 /* In sigsuspend state */ 446 int in_sigsuspend; 447 448 /* deferred signal info */ 449 siginfo_t deferred_siginfo; 450 451 /* signal mask to restore. */ 452 sigset_t deferred_sigmask; 453 454 /* the sigaction should be used for deferred signal. */ 455 struct sigaction deferred_sigact; 456 457 /* deferred signal delivery is performed, do not reenter. */ 458 int deferred_run; 459 460 /* Force new thread to exit. */ 461 int force_exit; 462 463 /* Thread state: */ 464 enum pthread_state state; 465 466 /* 467 * Error variable used instead of errno. The function __error() 468 * returns a pointer to this. 469 */ 470 int error; 471 472 /* 473 * The joiner is the thread that is joining to this thread. The 474 * join status keeps track of a join operation to another thread. 475 */ 476 struct pthread *joiner; 477 478 /* Miscellaneous flags; only set with scheduling lock held. */ 479 int flags; 480 #define THR_FLAGS_PRIVATE 0x0001 481 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 482 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 483 #define THR_FLAGS_DETACHED 0x0008 /* thread is detached */ 484 485 /* Thread list flags; only set with thread list lock held. */ 486 int tlflags; 487 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 488 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 489 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 490 491 /* 492 * Queues of the owned mutexes. Private queue must have index 493 * + 1 of the corresponding full queue. 494 */ 495 #define TMQ_NORM 0 /* NORMAL or PRIO_INHERIT normal */ 496 #define TMQ_NORM_PRIV 1 /* NORMAL or PRIO_INHERIT normal priv */ 497 #define TMQ_NORM_PP 2 /* PRIO_PROTECT normal mutexes */ 498 #define TMQ_NORM_PP_PRIV 3 /* PRIO_PROTECT normal priv */ 499 #define TMQ_ROBUST_PP 4 /* PRIO_PROTECT robust mutexes */ 500 #define TMQ_ROBUST_PP_PRIV 5 /* PRIO_PROTECT robust priv */ 501 #define TMQ_NITEMS 6 502 struct mutex_queue mq[TMQ_NITEMS]; 503 504 void *ret; 505 struct pthread_specific_elem *specific; 506 int specific_data_count; 507 508 /* Number rwlocks rdlocks held. */ 509 int rdlock_count; 510 511 /* 512 * Current locks bitmap for rtld. */ 513 int rtld_bits; 514 515 /* Thread control block */ 516 struct tcb *tcb; 517 518 /* Cleanup handlers Link List */ 519 struct pthread_cleanup *cleanup; 520 521 #ifdef _PTHREAD_FORCED_UNWIND 522 struct _Unwind_Exception ex; 523 void *unwind_stackend; 524 int unwind_disabled; 525 #endif 526 527 /* 528 * Magic value to help recognize a valid thread structure 529 * from an invalid one: 530 */ 531 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 532 u_int32_t magic; 533 534 /* Enable event reporting */ 535 int report_events; 536 537 /* Event mask */ 538 int event_mask; 539 540 /* Event */ 541 td_event_msg_t event_buf; 542 543 /* Wait channel */ 544 void *wchan; 545 546 /* Referenced mutex. */ 547 struct pthread_mutex *mutex_obj; 548 549 /* Thread will sleep. */ 550 int will_sleep; 551 552 /* Number of threads deferred. */ 553 int nwaiter_defer; 554 555 int robust_inited; 556 uintptr_t robust_list; 557 uintptr_t priv_robust_list; 558 uintptr_t inact_mtx; 559 560 /* Deferred threads from pthread_cond_signal. */ 561 unsigned int *defer_waiters[MAX_DEFER_WAITERS]; 562 #define _pthread_endzero wake_addr 563 564 struct wake_addr *wake_addr; 565 #define WAKE_ADDR(td) ((td)->wake_addr) 566 567 /* Sleep queue */ 568 struct sleepqueue *sleepqueue; 569 570 }; 571 572 #define THR_SHOULD_GC(thrd) \ 573 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \ 574 ((thrd)->flags & THR_FLAGS_DETACHED) != 0) 575 576 #define THR_IN_CRITICAL(thrd) \ 577 (((thrd)->locklevel > 0) || \ 578 ((thrd)->critical_count > 0)) 579 580 #define THR_CRITICAL_ENTER(thrd) \ 581 (thrd)->critical_count++ 582 583 #define THR_CRITICAL_LEAVE(thrd) \ 584 do { \ 585 (thrd)->critical_count--; \ 586 _thr_ast(thrd); \ 587 } while (0) 588 589 #define THR_UMUTEX_TRYLOCK(thrd, lck) \ 590 _thr_umutex_trylock((lck), TID(thrd)) 591 592 #define THR_UMUTEX_LOCK(thrd, lck) \ 593 _thr_umutex_lock((lck), TID(thrd)) 594 595 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 596 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 597 598 #define THR_UMUTEX_UNLOCK(thrd, lck) \ 599 _thr_umutex_unlock((lck), TID(thrd)) 600 601 #define THR_LOCK_ACQUIRE(thrd, lck) \ 602 do { \ 603 (thrd)->locklevel++; \ 604 _thr_umutex_lock(lck, TID(thrd)); \ 605 } while (0) 606 607 #define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \ 608 do { \ 609 (thrd)->locklevel++; \ 610 _thr_umutex_lock_spin(lck, TID(thrd)); \ 611 } while (0) 612 613 #ifdef _PTHREADS_INVARIANTS 614 #define THR_ASSERT_LOCKLEVEL(thrd) \ 615 do { \ 616 if (__predict_false((thrd)->locklevel <= 0)) \ 617 _thr_assert_lock_level(); \ 618 } while (0) 619 #else 620 #define THR_ASSERT_LOCKLEVEL(thrd) 621 #endif 622 623 #define THR_LOCK_RELEASE(thrd, lck) \ 624 do { \ 625 THR_ASSERT_LOCKLEVEL(thrd); \ 626 _thr_umutex_unlock((lck), TID(thrd)); \ 627 (thrd)->locklevel--; \ 628 _thr_ast(thrd); \ 629 } while (0) 630 631 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 632 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 633 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 634 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 635 636 #define THREAD_LIST_RDLOCK(curthrd) \ 637 do { \ 638 (curthrd)->locklevel++; \ 639 _thr_rwl_rdlock(&_thr_list_lock); \ 640 } while (0) 641 642 #define THREAD_LIST_WRLOCK(curthrd) \ 643 do { \ 644 (curthrd)->locklevel++; \ 645 _thr_rwl_wrlock(&_thr_list_lock); \ 646 } while (0) 647 648 #define THREAD_LIST_UNLOCK(curthrd) \ 649 do { \ 650 _thr_rwl_unlock(&_thr_list_lock); \ 651 (curthrd)->locklevel--; \ 652 _thr_ast(curthrd); \ 653 } while (0) 654 655 /* 656 * Macros to insert/remove threads to the all thread list and 657 * the gc list. 658 */ 659 #define THR_LIST_ADD(thrd) do { \ 660 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 661 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 662 _thr_hash_add(thrd); \ 663 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 664 } \ 665 } while (0) 666 #define THR_LIST_REMOVE(thrd) do { \ 667 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 668 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 669 _thr_hash_remove(thrd); \ 670 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 671 } \ 672 } while (0) 673 #define THR_GCLIST_ADD(thrd) do { \ 674 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 675 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 676 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 677 _gc_count++; \ 678 } \ 679 } while (0) 680 #define THR_GCLIST_REMOVE(thrd) do { \ 681 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 682 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 683 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 684 _gc_count--; \ 685 } \ 686 } while (0) 687 688 #define THR_REF_ADD(curthread, pthread) { \ 689 THR_CRITICAL_ENTER(curthread); \ 690 pthread->refcount++; \ 691 } while (0) 692 693 #define THR_REF_DEL(curthread, pthread) { \ 694 pthread->refcount--; \ 695 THR_CRITICAL_LEAVE(curthread); \ 696 } while (0) 697 698 #define GC_NEEDED() (_gc_count >= 5) 699 700 #define SHOULD_REPORT_EVENT(curthr, e) \ 701 (curthr->report_events && \ 702 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 703 704 #ifndef __LIBC_ISTHREADED_DECLARED 705 #define __LIBC_ISTHREADED_DECLARED 706 extern int __isthreaded; 707 #endif 708 709 /* 710 * Global variables for the pthread kernel. 711 */ 712 713 extern char *_usrstack __hidden; 714 extern struct pthread *_thr_initial __hidden; 715 716 /* For debugger */ 717 extern int _libthr_debug; 718 extern int _thread_event_mask; 719 extern struct pthread *_thread_last_event; 720 721 /* List of all threads: */ 722 extern pthreadlist _thread_list; 723 724 /* List of threads needing GC: */ 725 extern pthreadlist _thread_gc_list __hidden; 726 727 extern int _thread_active_threads; 728 extern atfork_head _thr_atfork_list __hidden; 729 extern struct urwlock _thr_atfork_lock __hidden; 730 731 /* Default thread attributes: */ 732 extern struct pthread_attr _pthread_attr_default __hidden; 733 734 /* Default mutex attributes: */ 735 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 736 extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden; 737 738 /* Default condition variable attributes: */ 739 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 740 741 extern struct pthread_prio _thr_priorities[] __hidden; 742 743 extern int _thr_is_smp __hidden; 744 745 extern size_t _thr_guard_default __hidden; 746 extern size_t _thr_stack_default __hidden; 747 extern size_t _thr_stack_initial __hidden; 748 extern int _thr_page_size __hidden; 749 extern int _thr_spinloops __hidden; 750 extern int _thr_yieldloops __hidden; 751 extern int _thr_queuefifo __hidden; 752 753 /* Garbage thread count. */ 754 extern int _gc_count __hidden; 755 756 extern struct umutex _mutex_static_lock __hidden; 757 extern struct umutex _cond_static_lock __hidden; 758 extern struct umutex _rwlock_static_lock __hidden; 759 extern struct umutex _keytable_lock __hidden; 760 extern struct urwlock _thr_list_lock __hidden; 761 extern struct umutex _thr_event_lock __hidden; 762 extern struct umutex _suspend_all_lock __hidden; 763 extern int _suspend_all_waiters __hidden; 764 extern int _suspend_all_cycle __hidden; 765 extern struct pthread *_single_thread __hidden; 766 767 /* 768 * Function prototype definitions. 769 */ 770 __BEGIN_DECLS 771 int _thr_setthreaded(int) __hidden; 772 int _mutex_cv_lock(struct pthread_mutex *, int, bool) __hidden; 773 int _mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden; 774 int _mutex_cv_attach(struct pthread_mutex *, int) __hidden; 775 int _mutex_cv_detach(struct pthread_mutex *, int *) __hidden; 776 int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden; 777 int _mutex_reinit(pthread_mutex_t *) __hidden; 778 void _mutex_fork(struct pthread *curthread) __hidden; 779 int _mutex_enter_robust(struct pthread *curthread, struct pthread_mutex *m) 780 __hidden; 781 void _mutex_leave_robust(struct pthread *curthread, struct pthread_mutex *m) 782 __hidden; 783 void _libpthread_init(struct pthread *) __hidden; 784 struct pthread *_thr_alloc(struct pthread *) __hidden; 785 void _thread_exit(const char *, int, const char *) __hidden __dead2; 786 void _thread_exitf(const char *, int, const char *, ...) __hidden __dead2 787 __printflike(3, 4); 788 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 789 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 790 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 791 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 792 void _thr_rtld_init(void) __hidden; 793 void _thr_rtld_postfork_child(void) __hidden; 794 int _thr_stack_alloc(struct pthread_attr *) __hidden; 795 void _thr_stack_free(struct pthread_attr *) __hidden; 796 void _thr_free(struct pthread *, struct pthread *) __hidden; 797 void _thr_gc(struct pthread *) __hidden; 798 void _thread_cleanupspecific(void) __hidden; 799 void _thread_printf(int, const char *, ...) __hidden __printflike(2, 3); 800 void _thread_vprintf(int, const char *, va_list) __hidden; 801 void _thr_spinlock_init(void) __hidden; 802 void _thr_cancel_enter(struct pthread *) __hidden; 803 void _thr_cancel_enter2(struct pthread *, int) __hidden; 804 void _thr_cancel_leave(struct pthread *, int) __hidden; 805 void _thr_testcancel(struct pthread *) __hidden; 806 void _thr_signal_block(struct pthread *) __hidden; 807 void _thr_signal_unblock(struct pthread *) __hidden; 808 void _thr_signal_init(int) __hidden; 809 void _thr_signal_deinit(void) __hidden; 810 int _thr_send_sig(struct pthread *, int sig) __hidden; 811 void _thr_list_init(void) __hidden; 812 void _thr_hash_add(struct pthread *) __hidden; 813 void _thr_hash_remove(struct pthread *) __hidden; 814 struct pthread *_thr_hash_find(struct pthread *) __hidden; 815 void _thr_link(struct pthread *, struct pthread *) __hidden; 816 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 817 void _thr_assert_lock_level(void) __hidden __dead2; 818 void _thr_ast(struct pthread *) __hidden; 819 void _thr_report_creation(struct pthread *curthread, 820 struct pthread *newthread) __hidden; 821 void _thr_report_death(struct pthread *curthread) __hidden; 822 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 823 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 824 void _thr_signal_prefork(void) __hidden; 825 void _thr_signal_postfork(void) __hidden; 826 void _thr_signal_postfork_child(void) __hidden; 827 void _thr_suspend_all_lock(struct pthread *) __hidden; 828 void _thr_suspend_all_unlock(struct pthread *) __hidden; 829 void _thr_try_gc(struct pthread *, struct pthread *) __hidden; 830 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 831 struct sched_param *param) __hidden; 832 int _schedparam_to_rtp(int policy, const struct sched_param *param, 833 struct rtprio *rtp) __hidden; 834 void _thread_bp_create(void); 835 void _thread_bp_death(void); 836 int _sched_yield(void); 837 838 void _pthread_cleanup_push(void (*)(void *), void *); 839 void _pthread_cleanup_pop(int); 840 void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden; 841 #ifndef _LIBC_PRIVATE_H_ 842 void _pthread_cancel_enter(int maycancel); 843 void _pthread_cancel_leave(int maycancel); 844 #endif 845 int _pthread_mutex_consistent(pthread_mutex_t * _Nonnull); 846 int _pthread_mutexattr_getrobust(pthread_mutexattr_t * _Nonnull __restrict, 847 int * _Nonnull __restrict); 848 int _pthread_mutexattr_setrobust(pthread_mutexattr_t * _Nonnull, int); 849 850 /* #include <fcntl.h> */ 851 #ifdef _SYS_FCNTL_H_ 852 #ifndef _LIBC_PRIVATE_H_ 853 int __sys_fcntl(int, int, ...); 854 int __sys_openat(int, const char *, int, ...); 855 #endif /* _LIBC_PRIVATE_H_ */ 856 #endif /* _SYS_FCNTL_H_ */ 857 858 /* #include <signal.h> */ 859 #ifdef _SIGNAL_H_ 860 int __sys_kill(pid_t, int); 861 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 862 int __sys_sigpending(sigset_t *); 863 int __sys_sigreturn(const ucontext_t *); 864 #ifndef _LIBC_PRIVATE_H_ 865 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 866 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 867 int __sys_sigsuspend(const sigset_t *); 868 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 869 const struct timespec *); 870 int __sys_sigwait(const sigset_t *, int *); 871 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 872 #endif /* _LIBC_PRIVATE_H_ */ 873 #endif /* _SYS_FCNTL_H_ */ 874 875 /* #include <time.h> */ 876 #ifdef _TIME_H_ 877 #ifndef _LIBC_PRIVATE_H_ 878 int __sys_clock_nanosleep(clockid_t, int, const struct timespec *, 879 struct timespec *); 880 int __sys_nanosleep(const struct timespec *, struct timespec *); 881 #endif /* _LIBC_PRIVATE_H_ */ 882 #endif /* _SYS_FCNTL_H_ */ 883 884 /* #include <sys/ucontext.h> */ 885 #ifdef _SYS_UCONTEXT_H_ 886 #ifndef _LIBC_PRIVATE_H_ 887 int __sys_setcontext(const ucontext_t *ucp); 888 int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 889 #endif /* _LIBC_PRIVATE_H_ */ 890 #endif /* _SYS_FCNTL_H_ */ 891 892 /* #include <unistd.h> */ 893 #ifdef _UNISTD_H_ 894 void __sys_exit(int); 895 pid_t __sys_getpid(void); 896 #ifndef _LIBC_PRIVATE_H_ 897 int __sys_close(int); 898 int __sys_fork(void); 899 ssize_t __sys_read(int, void *, size_t); 900 #endif /* _LIBC_PRIVATE_H_ */ 901 #endif /* _SYS_FCNTL_H_ */ 902 903 static inline int 904 _thr_isthreaded(void) 905 { 906 return (__isthreaded != 0); 907 } 908 909 static inline int 910 _thr_is_inited(void) 911 { 912 return (_thr_initial != NULL); 913 } 914 915 static inline void 916 _thr_check_init(void) 917 { 918 if (_thr_initial == NULL) 919 _libpthread_init(NULL); 920 } 921 922 struct wake_addr *_thr_alloc_wake_addr(void); 923 void _thr_release_wake_addr(struct wake_addr *); 924 int _thr_sleep(struct pthread *, int, const struct timespec *); 925 926 void _thr_wake_addr_init(void) __hidden; 927 928 static inline void 929 _thr_clear_wake(struct pthread *td) 930 { 931 td->wake_addr->value = 0; 932 } 933 934 static inline int 935 _thr_is_woken(struct pthread *td) 936 { 937 return td->wake_addr->value != 0; 938 } 939 940 static inline void 941 _thr_set_wake(unsigned int *waddr) 942 { 943 *waddr = 1; 944 _thr_umtx_wake(waddr, INT_MAX, 0); 945 } 946 947 void _thr_wake_all(unsigned int *waddrs[], int) __hidden; 948 949 static inline struct pthread * 950 _sleepq_first(struct sleepqueue *sq) 951 { 952 return TAILQ_FIRST(&sq->sq_blocked); 953 } 954 955 void _sleepq_init(void) __hidden; 956 struct sleepqueue *_sleepq_alloc(void) __hidden; 957 void _sleepq_free(struct sleepqueue *) __hidden; 958 void _sleepq_lock(void *) __hidden; 959 void _sleepq_unlock(void *) __hidden; 960 struct sleepqueue *_sleepq_lookup(void *) __hidden; 961 void _sleepq_add(void *, struct pthread *) __hidden; 962 int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden; 963 void _sleepq_drop(struct sleepqueue *, 964 void (*cb)(struct pthread *, void *arg), void *) __hidden; 965 966 int _pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex, 967 void *(calloc_cb)(size_t, size_t)); 968 969 struct dl_phdr_info; 970 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info); 971 void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden; 972 void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden; 973 void _thr_stack_fix_protection(struct pthread *thrd); 974 975 int *__error_threaded(void) __hidden; 976 void __thr_interpose_libc(void) __hidden; 977 pid_t __thr_fork(void); 978 int __thr_setcontext(const ucontext_t *ucp); 979 int __thr_sigaction(int sig, const struct sigaction *act, 980 struct sigaction *oact) __hidden; 981 int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset); 982 int __thr_sigsuspend(const sigset_t * set); 983 int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info, 984 const struct timespec * timeout); 985 int __thr_sigwait(const sigset_t *set, int *sig); 986 int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info); 987 int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 988 989 void __thr_map_stacks_exec(void); 990 991 struct _spinlock; 992 void __thr_spinunlock(struct _spinlock *lck); 993 void __thr_spinlock(struct _spinlock *lck); 994 995 struct tcb *_tcb_ctor(struct pthread *, int); 996 void _tcb_dtor(struct tcb *); 997 998 void __thr_pshared_init(void) __hidden; 999 void *__thr_pshared_offpage(void *key, int doalloc) __hidden; 1000 void __thr_pshared_destroy(void *key) __hidden; 1001 void __thr_pshared_atfork_pre(void) __hidden; 1002 void __thr_pshared_atfork_post(void) __hidden; 1003 1004 __END_DECLS 1005 __NULLABILITY_PRAGMA_POP 1006 1007 #endif /* !_THR_PRIVATE_H */ 1008