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