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 <stddef.h> 49 #include <stdio.h> 50 #include <unistd.h> 51 #include <ucontext.h> 52 #include <sys/thr.h> 53 #include <pthread.h> 54 55 #define SYM_FB10(sym) __CONCAT(sym, _fb10) 56 #define SYM_FBP10(sym) __CONCAT(sym, _fbp10) 57 #define WEAK_REF(sym, alias) __weak_reference(sym, alias) 58 #define SYM_COMPAT(sym, impl, ver) __sym_compat(sym, impl, ver) 59 #define SYM_DEFAULT(sym, impl, ver) __sym_default(sym, impl, ver) 60 61 #define FB10_COMPAT(func, sym) \ 62 WEAK_REF(func, SYM_FB10(sym)); \ 63 SYM_COMPAT(sym, SYM_FB10(sym), FBSD_1.0) 64 65 #define FB10_COMPAT_PRIVATE(func, sym) \ 66 WEAK_REF(func, SYM_FBP10(sym)); \ 67 SYM_DEFAULT(sym, SYM_FBP10(sym), FBSDprivate_1.0) 68 69 #include "pthread_md.h" 70 #include "thr_umtx.h" 71 #include "thread_db.h" 72 73 #ifdef _PTHREAD_FORCED_UNWIND 74 #define _BSD_SOURCE 75 #include <unwind.h> 76 #endif 77 78 typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; 79 typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; 80 TAILQ_HEAD(mutex_queue, pthread_mutex); 81 82 /* Signal to do cancellation */ 83 #define SIGCANCEL SIGTHR 84 85 /* 86 * Kernel fatal error handler macro. 87 */ 88 #define PANIC(string) _thread_exit(__FILE__,__LINE__,string) 89 90 /* Output debug messages like this: */ 91 #define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) 92 #define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args) 93 94 #ifdef _PTHREADS_INVARIANTS 95 #define THR_ASSERT(cond, msg) do { \ 96 if (__predict_false(!(cond))) \ 97 PANIC(msg); \ 98 } while (0) 99 #else 100 #define THR_ASSERT(cond, msg) 101 #endif 102 103 #ifdef PIC 104 # define STATIC_LIB_REQUIRE(name) 105 #else 106 # define STATIC_LIB_REQUIRE(name) __asm (".globl " #name) 107 #endif 108 109 #define TIMESPEC_ADD(dst, src, val) \ 110 do { \ 111 (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \ 112 (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \ 113 if ((dst)->tv_nsec >= 1000000000) { \ 114 (dst)->tv_sec++; \ 115 (dst)->tv_nsec -= 1000000000; \ 116 } \ 117 } while (0) 118 119 #define TIMESPEC_SUB(dst, src, val) \ 120 do { \ 121 (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ 122 (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ 123 if ((dst)->tv_nsec < 0) { \ 124 (dst)->tv_sec--; \ 125 (dst)->tv_nsec += 1000000000; \ 126 } \ 127 } while (0) 128 129 /* XXX These values should be same as those defined in pthread.h */ 130 #define THR_MUTEX_INITIALIZER ((struct pthread_mutex *)NULL) 131 #define THR_ADAPTIVE_MUTEX_INITIALIZER ((struct pthread_mutex *)1) 132 #define THR_MUTEX_DESTROYED ((struct pthread_mutex *)2) 133 #define THR_COND_INITIALIZER ((struct pthread_cond *)NULL) 134 #define THR_COND_DESTROYED ((struct pthread_cond *)1) 135 #define THR_RWLOCK_INITIALIZER ((struct pthread_rwlock *)NULL) 136 #define THR_RWLOCK_DESTROYED ((struct pthread_rwlock *)1) 137 138 #define PMUTEX_FLAG_TYPE_MASK 0x0ff 139 #define PMUTEX_FLAG_PRIVATE 0x100 140 #define PMUTEX_FLAG_DEFERED 0x200 141 #define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK) 142 143 #define MAX_DEFER_WAITERS 50 144 145 struct pthread_mutex { 146 /* 147 * Lock for accesses to this structure. 148 */ 149 struct umutex m_lock; 150 int m_flags; 151 struct pthread *m_owner; 152 int m_count; 153 int m_spinloops; 154 int m_yieldloops; 155 /* 156 * Link for all mutexes a thread currently owns. 157 */ 158 TAILQ_ENTRY(pthread_mutex) m_qe; 159 }; 160 161 struct pthread_mutex_attr { 162 enum pthread_mutextype m_type; 163 int m_protocol; 164 int m_ceiling; 165 }; 166 167 #define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ 168 { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE } 169 170 struct pthread_cond { 171 __uint32_t __has_user_waiters; 172 __uint32_t __has_kern_waiters; 173 __uint32_t __flags; 174 __uint32_t __clock_id; 175 }; 176 177 struct pthread_cond_attr { 178 int c_pshared; 179 int c_clockid; 180 }; 181 182 struct pthread_barrier { 183 struct umutex b_lock; 184 struct ucond b_cv; 185 int64_t b_cycle; 186 int b_count; 187 int b_waiters; 188 int b_refcount; 189 int b_destroying; 190 }; 191 192 struct pthread_barrierattr { 193 int pshared; 194 }; 195 196 struct pthread_spinlock { 197 struct umutex s_lock; 198 }; 199 200 /* 201 * Flags for condition variables. 202 */ 203 #define COND_FLAGS_PRIVATE 0x01 204 #define COND_FLAGS_INITED 0x02 205 #define COND_FLAGS_BUSY 0x04 206 207 /* 208 * Cleanup definitions. 209 */ 210 struct pthread_cleanup { 211 struct pthread_cleanup *prev; 212 void (*routine)(void *); 213 void *routine_arg; 214 int onheap; 215 }; 216 217 #define THR_CLEANUP_PUSH(td, func, arg) { \ 218 struct pthread_cleanup __cup; \ 219 \ 220 __cup.routine = func; \ 221 __cup.routine_arg = arg; \ 222 __cup.onheap = 0; \ 223 __cup.prev = (td)->cleanup; \ 224 (td)->cleanup = &__cup; 225 226 #define THR_CLEANUP_POP(td, exec) \ 227 (td)->cleanup = __cup.prev; \ 228 if ((exec) != 0) \ 229 __cup.routine(__cup.routine_arg); \ 230 } 231 232 struct pthread_atfork { 233 TAILQ_ENTRY(pthread_atfork) qe; 234 void (*prepare)(void); 235 void (*parent)(void); 236 void (*child)(void); 237 }; 238 239 struct pthread_attr { 240 #define pthread_attr_start_copy sched_policy 241 int sched_policy; 242 int sched_inherit; 243 int prio; 244 int suspend; 245 #define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ 246 int flags; 247 void *stackaddr_attr; 248 size_t stacksize_attr; 249 size_t guardsize_attr; 250 #define pthread_attr_end_copy cpuset 251 cpuset_t *cpuset; 252 size_t cpusetsize; 253 }; 254 255 struct wake_addr { 256 struct wake_addr *link; 257 unsigned int value; 258 char pad[12]; 259 }; 260 261 struct sleepqueue { 262 TAILQ_HEAD(, pthread) sq_blocked; 263 SLIST_HEAD(, sleepqueue) sq_freeq; 264 LIST_ENTRY(sleepqueue) sq_hash; 265 SLIST_ENTRY(sleepqueue) sq_flink; 266 void *sq_wchan; 267 int sq_type; 268 }; 269 270 /* 271 * Thread creation state attributes. 272 */ 273 #define THR_CREATE_RUNNING 0 274 #define THR_CREATE_SUSPENDED 1 275 276 /* 277 * Miscellaneous definitions. 278 */ 279 #define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) 280 281 /* 282 * Maximum size of initial thread's stack. This perhaps deserves to be larger 283 * than the stacks of other threads, since many applications are likely to run 284 * almost entirely on this stack. 285 */ 286 #define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) 287 288 /* 289 * Define priorities returned by kernel. 290 */ 291 #define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) 292 #define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) 293 #define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) 294 295 #define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) 296 #define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) 297 #define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) 298 299 /* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ 300 #define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) 301 #define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) 302 #define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) 303 304 struct pthread_prio { 305 int pri_min; 306 int pri_max; 307 int pri_default; 308 }; 309 310 struct pthread_rwlockattr { 311 int pshared; 312 }; 313 314 struct pthread_rwlock { 315 struct urwlock lock; 316 struct pthread *owner; 317 }; 318 319 /* 320 * Thread states. 321 */ 322 enum pthread_state { 323 PS_RUNNING, 324 PS_DEAD 325 }; 326 327 struct pthread_specific_elem { 328 const void *data; 329 int seqno; 330 }; 331 332 struct pthread_key { 333 volatile int allocated; 334 int seqno; 335 void (*destructor)(void *); 336 }; 337 338 /* 339 * lwpid_t is 32bit but kernel thr API exports tid as long type 340 * in very earily date. 341 */ 342 #define TID(thread) ((uint32_t) ((thread)->tid)) 343 344 /* 345 * Thread structure. 346 */ 347 struct pthread { 348 #define _pthread_startzero tid 349 /* Kernel thread id. */ 350 long tid; 351 #define TID_TERMINATED 1 352 353 /* 354 * Lock for accesses to this thread structure. 355 */ 356 struct umutex lock; 357 358 /* Internal condition variable cycle number. */ 359 uint32_t cycle; 360 361 /* How many low level locks the thread held. */ 362 int locklevel; 363 364 /* 365 * Set to non-zero when this thread has entered a critical 366 * region. We allow for recursive entries into critical regions. 367 */ 368 int critical_count; 369 370 /* Signal blocked counter. */ 371 int sigblock; 372 373 /* Queue entry for list of all threads. */ 374 TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ 375 376 /* Queue entry for GC lists. */ 377 TAILQ_ENTRY(pthread) gcle; 378 379 /* Hash queue entry. */ 380 LIST_ENTRY(pthread) hle; 381 382 /* Sleep queue entry */ 383 TAILQ_ENTRY(pthread) wle; 384 385 /* Threads reference count. */ 386 int refcount; 387 388 /* 389 * Thread start routine, argument, stack pointer and thread 390 * attributes. 391 */ 392 void *(*start_routine)(void *); 393 void *arg; 394 struct pthread_attr attr; 395 396 #define SHOULD_CANCEL(thr) \ 397 ((thr)->cancel_pending && (thr)->cancel_enable && \ 398 (thr)->no_cancel == 0) 399 400 /* Cancellation is enabled */ 401 int cancel_enable; 402 403 /* Cancellation request is pending */ 404 int cancel_pending; 405 406 /* Thread is at cancellation point */ 407 int cancel_point; 408 409 /* Cancellation is temporarily disabled */ 410 int no_cancel; 411 412 /* Asynchronouse cancellation is enabled */ 413 int cancel_async; 414 415 /* Cancellation is in progress */ 416 int cancelling; 417 418 /* Thread temporary signal mask. */ 419 sigset_t sigmask; 420 421 /* Thread should unblock SIGCANCEL. */ 422 int unblock_sigcancel; 423 424 /* In sigsuspend state */ 425 int in_sigsuspend; 426 427 /* deferred signal info */ 428 siginfo_t deferred_siginfo; 429 430 /* signal mask to restore. */ 431 sigset_t deferred_sigmask; 432 433 /* the sigaction should be used for deferred signal. */ 434 struct sigaction deferred_sigact; 435 436 /* deferred signal delivery is performed, do not reenter. */ 437 int deferred_run; 438 439 /* Force new thread to exit. */ 440 int force_exit; 441 442 /* Thread state: */ 443 enum pthread_state state; 444 445 /* 446 * Error variable used instead of errno. The function __error() 447 * returns a pointer to this. 448 */ 449 int error; 450 451 /* 452 * The joiner is the thread that is joining to this thread. The 453 * join status keeps track of a join operation to another thread. 454 */ 455 struct pthread *joiner; 456 457 /* Miscellaneous flags; only set with scheduling lock held. */ 458 int flags; 459 #define THR_FLAGS_PRIVATE 0x0001 460 #define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ 461 #define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ 462 #define THR_FLAGS_DETACHED 0x0008 /* thread is detached */ 463 464 /* Thread list flags; only set with thread list lock held. */ 465 int tlflags; 466 #define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ 467 #define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ 468 #define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ 469 470 /* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */ 471 struct mutex_queue mutexq; 472 473 /* Queue of all owned PRIO_PROTECT mutexes. */ 474 struct mutex_queue pp_mutexq; 475 476 void *ret; 477 struct pthread_specific_elem *specific; 478 int specific_data_count; 479 480 /* Number rwlocks rdlocks held. */ 481 int rdlock_count; 482 483 /* 484 * Current locks bitmap for rtld. */ 485 int rtld_bits; 486 487 /* Thread control block */ 488 struct tcb *tcb; 489 490 /* Cleanup handlers Link List */ 491 struct pthread_cleanup *cleanup; 492 493 #ifdef _PTHREAD_FORCED_UNWIND 494 struct _Unwind_Exception ex; 495 void *unwind_stackend; 496 int unwind_disabled; 497 #endif 498 499 /* 500 * Magic value to help recognize a valid thread structure 501 * from an invalid one: 502 */ 503 #define THR_MAGIC ((u_int32_t) 0xd09ba115) 504 u_int32_t magic; 505 506 /* Enable event reporting */ 507 int report_events; 508 509 /* Event mask */ 510 int event_mask; 511 512 /* Event */ 513 td_event_msg_t event_buf; 514 515 /* Wait channel */ 516 void *wchan; 517 518 /* Referenced mutex. */ 519 struct pthread_mutex *mutex_obj; 520 521 /* Thread will sleep. */ 522 int will_sleep; 523 524 /* Number of threads deferred. */ 525 int nwaiter_defer; 526 527 /* Deferred threads from pthread_cond_signal. */ 528 unsigned int *defer_waiters[MAX_DEFER_WAITERS]; 529 #define _pthread_endzero wake_addr 530 531 struct wake_addr *wake_addr; 532 #define WAKE_ADDR(td) ((td)->wake_addr) 533 534 /* Sleep queue */ 535 struct sleepqueue *sleepqueue; 536 537 }; 538 539 #define THR_SHOULD_GC(thrd) \ 540 ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \ 541 ((thrd)->flags & THR_FLAGS_DETACHED) != 0) 542 543 #define THR_IN_CRITICAL(thrd) \ 544 (((thrd)->locklevel > 0) || \ 545 ((thrd)->critical_count > 0)) 546 547 #define THR_CRITICAL_ENTER(thrd) \ 548 (thrd)->critical_count++ 549 550 #define THR_CRITICAL_LEAVE(thrd) \ 551 do { \ 552 (thrd)->critical_count--; \ 553 _thr_ast(thrd); \ 554 } while (0) 555 556 #define THR_UMUTEX_TRYLOCK(thrd, lck) \ 557 _thr_umutex_trylock((lck), TID(thrd)) 558 559 #define THR_UMUTEX_LOCK(thrd, lck) \ 560 _thr_umutex_lock((lck), TID(thrd)) 561 562 #define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ 563 _thr_umutex_timedlock((lck), TID(thrd), (timo)) 564 565 #define THR_UMUTEX_UNLOCK(thrd, lck) \ 566 _thr_umutex_unlock((lck), TID(thrd)) 567 568 #define THR_LOCK_ACQUIRE(thrd, lck) \ 569 do { \ 570 (thrd)->locklevel++; \ 571 _thr_umutex_lock(lck, TID(thrd)); \ 572 } while (0) 573 574 #define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \ 575 do { \ 576 (thrd)->locklevel++; \ 577 _thr_umutex_lock_spin(lck, TID(thrd)); \ 578 } while (0) 579 580 #ifdef _PTHREADS_INVARIANTS 581 #define THR_ASSERT_LOCKLEVEL(thrd) \ 582 do { \ 583 if (__predict_false((thrd)->locklevel <= 0)) \ 584 _thr_assert_lock_level(); \ 585 } while (0) 586 #else 587 #define THR_ASSERT_LOCKLEVEL(thrd) 588 #endif 589 590 #define THR_LOCK_RELEASE(thrd, lck) \ 591 do { \ 592 THR_ASSERT_LOCKLEVEL(thrd); \ 593 _thr_umutex_unlock((lck), TID(thrd)); \ 594 (thrd)->locklevel--; \ 595 _thr_ast(thrd); \ 596 } while (0) 597 598 #define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) 599 #define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) 600 #define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) 601 #define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) 602 603 #define THREAD_LIST_RDLOCK(curthrd) \ 604 do { \ 605 (curthrd)->locklevel++; \ 606 _thr_rwl_rdlock(&_thr_list_lock); \ 607 } while (0) 608 609 #define THREAD_LIST_WRLOCK(curthrd) \ 610 do { \ 611 (curthrd)->locklevel++; \ 612 _thr_rwl_wrlock(&_thr_list_lock); \ 613 } while (0) 614 615 #define THREAD_LIST_UNLOCK(curthrd) \ 616 do { \ 617 _thr_rwl_unlock(&_thr_list_lock); \ 618 (curthrd)->locklevel--; \ 619 _thr_ast(curthrd); \ 620 } while (0) 621 622 /* 623 * Macros to insert/remove threads to the all thread list and 624 * the gc list. 625 */ 626 #define THR_LIST_ADD(thrd) do { \ 627 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ 628 TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ 629 _thr_hash_add(thrd); \ 630 (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ 631 } \ 632 } while (0) 633 #define THR_LIST_REMOVE(thrd) do { \ 634 if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ 635 TAILQ_REMOVE(&_thread_list, thrd, tle); \ 636 _thr_hash_remove(thrd); \ 637 (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ 638 } \ 639 } while (0) 640 #define THR_GCLIST_ADD(thrd) do { \ 641 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ 642 TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ 643 (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ 644 _gc_count++; \ 645 } \ 646 } while (0) 647 #define THR_GCLIST_REMOVE(thrd) do { \ 648 if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ 649 TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ 650 (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ 651 _gc_count--; \ 652 } \ 653 } while (0) 654 655 #define THR_REF_ADD(curthread, pthread) { \ 656 THR_CRITICAL_ENTER(curthread); \ 657 pthread->refcount++; \ 658 } while (0) 659 660 #define THR_REF_DEL(curthread, pthread) { \ 661 pthread->refcount--; \ 662 THR_CRITICAL_LEAVE(curthread); \ 663 } while (0) 664 665 #define GC_NEEDED() (_gc_count >= 5) 666 667 #define SHOULD_REPORT_EVENT(curthr, e) \ 668 (curthr->report_events && \ 669 (((curthr)->event_mask | _thread_event_mask ) & e) != 0) 670 671 extern int __isthreaded; 672 673 /* 674 * Global variables for the pthread kernel. 675 */ 676 677 extern char *_usrstack __hidden; 678 extern struct pthread *_thr_initial __hidden; 679 680 /* For debugger */ 681 extern int _libthr_debug; 682 extern int _thread_event_mask; 683 extern struct pthread *_thread_last_event; 684 685 /* List of all threads: */ 686 extern pthreadlist _thread_list; 687 688 /* List of threads needing GC: */ 689 extern pthreadlist _thread_gc_list __hidden; 690 691 extern int _thread_active_threads; 692 extern atfork_head _thr_atfork_list __hidden; 693 extern struct urwlock _thr_atfork_lock __hidden; 694 695 /* Default thread attributes: */ 696 extern struct pthread_attr _pthread_attr_default __hidden; 697 698 /* Default mutex attributes: */ 699 extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; 700 extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden; 701 702 /* Default condition variable attributes: */ 703 extern struct pthread_cond_attr _pthread_condattr_default __hidden; 704 705 extern struct pthread_prio _thr_priorities[] __hidden; 706 707 extern pid_t _thr_pid __hidden; 708 extern int _thr_is_smp __hidden; 709 710 extern size_t _thr_guard_default __hidden; 711 extern size_t _thr_stack_default __hidden; 712 extern size_t _thr_stack_initial __hidden; 713 extern int _thr_page_size __hidden; 714 extern int _thr_spinloops __hidden; 715 extern int _thr_yieldloops __hidden; 716 extern int _thr_queuefifo __hidden; 717 718 /* Garbage thread count. */ 719 extern int _gc_count __hidden; 720 721 extern struct umutex _mutex_static_lock __hidden; 722 extern struct umutex _cond_static_lock __hidden; 723 extern struct umutex _rwlock_static_lock __hidden; 724 extern struct umutex _keytable_lock __hidden; 725 extern struct urwlock _thr_list_lock __hidden; 726 extern struct umutex _thr_event_lock __hidden; 727 extern struct umutex _suspend_all_lock __hidden; 728 extern int _suspend_all_waiters __hidden; 729 extern int _suspend_all_cycle __hidden; 730 extern struct pthread *_single_thread __hidden; 731 732 /* 733 * Function prototype definitions. 734 */ 735 __BEGIN_DECLS 736 int _thr_setthreaded(int) __hidden; 737 int _mutex_cv_lock(struct pthread_mutex *, int) __hidden; 738 int _mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden; 739 int _mutex_cv_attach(struct pthread_mutex *, int) __hidden; 740 int _mutex_cv_detach(struct pthread_mutex *, int *) __hidden; 741 int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden; 742 int _mutex_reinit(pthread_mutex_t *) __hidden; 743 void _mutex_fork(struct pthread *curthread) __hidden; 744 void _libpthread_init(struct pthread *) __hidden; 745 struct pthread *_thr_alloc(struct pthread *) __hidden; 746 void _thread_exit(const char *, int, const char *) __hidden __dead2; 747 int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; 748 void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; 749 void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; 750 int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; 751 void _thr_rtld_init(void) __hidden; 752 void _thr_rtld_postfork_child(void) __hidden; 753 int _thr_stack_alloc(struct pthread_attr *) __hidden; 754 void _thr_stack_free(struct pthread_attr *) __hidden; 755 void _thr_free(struct pthread *, struct pthread *) __hidden; 756 void _thr_gc(struct pthread *) __hidden; 757 void _thread_cleanupspecific(void) __hidden; 758 void _thread_printf(int, const char *, ...) __hidden; 759 void _thr_spinlock_init(void) __hidden; 760 void _thr_cancel_enter(struct pthread *) __hidden; 761 void _thr_cancel_enter2(struct pthread *, int) __hidden; 762 void _thr_cancel_leave(struct pthread *, int) __hidden; 763 void _thr_testcancel(struct pthread *) __hidden; 764 void _thr_signal_block(struct pthread *) __hidden; 765 void _thr_signal_unblock(struct pthread *) __hidden; 766 void _thr_signal_init(void) __hidden; 767 void _thr_signal_deinit(void) __hidden; 768 int _thr_send_sig(struct pthread *, int sig) __hidden; 769 void _thr_list_init(void) __hidden; 770 void _thr_hash_add(struct pthread *) __hidden; 771 void _thr_hash_remove(struct pthread *) __hidden; 772 struct pthread *_thr_hash_find(struct pthread *) __hidden; 773 void _thr_link(struct pthread *, struct pthread *) __hidden; 774 void _thr_unlink(struct pthread *, struct pthread *) __hidden; 775 void _thr_assert_lock_level(void) __hidden __dead2; 776 void _thr_ast(struct pthread *) __hidden; 777 void _thr_once_init(void) __hidden; 778 void _thr_report_creation(struct pthread *curthread, 779 struct pthread *newthread) __hidden; 780 void _thr_report_death(struct pthread *curthread) __hidden; 781 int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; 782 int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; 783 void _thr_signal_prefork(void) __hidden; 784 void _thr_signal_postfork(void) __hidden; 785 void _thr_signal_postfork_child(void) __hidden; 786 void _thr_suspend_all_lock(struct pthread *) __hidden; 787 void _thr_suspend_all_unlock(struct pthread *) __hidden; 788 void _thr_try_gc(struct pthread *, struct pthread *) __hidden; 789 int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, 790 struct sched_param *param) __hidden; 791 int _schedparam_to_rtp(int policy, const struct sched_param *param, 792 struct rtprio *rtp) __hidden; 793 void _thread_bp_create(void); 794 void _thread_bp_death(void); 795 int _sched_yield(void); 796 797 void _pthread_cleanup_push(void (*)(void *), void *); 798 void _pthread_cleanup_pop(int); 799 void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden; 800 void _pthread_cancel_enter(int maycancel); 801 void _pthread_cancel_leave(int maycancel); 802 803 /* #include <fcntl.h> */ 804 #ifdef _SYS_FCNTL_H_ 805 int __sys_fcntl(int, int, ...); 806 int __sys_open(const char *, int, ...); 807 int __sys_openat(int, const char *, int, ...); 808 #endif 809 810 /* #include <signal.h> */ 811 #ifdef _SIGNAL_H_ 812 int __sys_kill(pid_t, int); 813 int __sys_sigaction(int, const struct sigaction *, struct sigaction *); 814 int __sys_sigpending(sigset_t *); 815 int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 816 int __sys_sigsuspend(const sigset_t *); 817 int __sys_sigreturn(const ucontext_t *); 818 int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *); 819 int __sys_sigwait(const sigset_t *, int *); 820 int __sys_sigtimedwait(const sigset_t *, siginfo_t *, 821 const struct timespec *); 822 int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); 823 #endif 824 825 /* #include <time.h> */ 826 #ifdef _TIME_H_ 827 int __sys_nanosleep(const struct timespec *, struct timespec *); 828 #endif 829 830 /* #include <sys/ucontext.h> */ 831 #ifdef _SYS_UCONTEXT_H_ 832 int __sys_setcontext(const ucontext_t *ucp); 833 int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); 834 #endif 835 836 /* #include <unistd.h> */ 837 #ifdef _UNISTD_H_ 838 int __sys_close(int); 839 int __sys_fork(void); 840 pid_t __sys_getpid(void); 841 ssize_t __sys_read(int, void *, size_t); 842 ssize_t __sys_write(int, const void *, size_t); 843 void __sys_exit(int); 844 #endif 845 846 static inline int 847 _thr_isthreaded(void) 848 { 849 return (__isthreaded != 0); 850 } 851 852 static inline int 853 _thr_is_inited(void) 854 { 855 return (_thr_initial != NULL); 856 } 857 858 static inline void 859 _thr_check_init(void) 860 { 861 if (_thr_initial == NULL) 862 _libpthread_init(NULL); 863 } 864 865 struct wake_addr *_thr_alloc_wake_addr(void); 866 void _thr_release_wake_addr(struct wake_addr *); 867 int _thr_sleep(struct pthread *, int, const struct timespec *); 868 869 void _thr_wake_addr_init(void) __hidden; 870 871 static inline void 872 _thr_clear_wake(struct pthread *td) 873 { 874 td->wake_addr->value = 0; 875 } 876 877 static inline int 878 _thr_is_woken(struct pthread *td) 879 { 880 return td->wake_addr->value != 0; 881 } 882 883 static inline void 884 _thr_set_wake(unsigned int *waddr) 885 { 886 *waddr = 1; 887 _thr_umtx_wake(waddr, INT_MAX, 0); 888 } 889 890 void _thr_wake_all(unsigned int *waddrs[], int) __hidden; 891 892 static inline struct pthread * 893 _sleepq_first(struct sleepqueue *sq) 894 { 895 return TAILQ_FIRST(&sq->sq_blocked); 896 } 897 898 void _sleepq_init(void) __hidden; 899 struct sleepqueue *_sleepq_alloc(void) __hidden; 900 void _sleepq_free(struct sleepqueue *) __hidden; 901 void _sleepq_lock(void *) __hidden; 902 void _sleepq_unlock(void *) __hidden; 903 struct sleepqueue *_sleepq_lookup(void *) __hidden; 904 void _sleepq_add(void *, struct pthread *) __hidden; 905 int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden; 906 void _sleepq_drop(struct sleepqueue *, 907 void (*cb)(struct pthread *, void *arg), void *) __hidden; 908 909 struct dl_phdr_info; 910 void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info); 911 void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden; 912 void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden; 913 void _thr_stack_fix_protection(struct pthread *thrd); 914 915 __END_DECLS 916 917 #endif /* !_THR_PRIVATE_H */ 918