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