thr_init.c revision 156901
136285Sbrian/* 236285Sbrian * Copyright (c) 2003 Daniel M. Eischen <deischen@freebsd.org> 336285Sbrian * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 436285Sbrian * All rights reserved. 536285Sbrian * 636285Sbrian * Redistribution and use in source and binary forms, with or without 736285Sbrian * modification, are permitted provided that the following conditions 836285Sbrian * are met: 936285Sbrian * 1. Redistributions of source code must retain the above copyright 1036285Sbrian * notice, this list of conditions and the following disclaimer. 1136285Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1236285Sbrian * notice, this list of conditions and the following disclaimer in the 1336285Sbrian * documentation and/or other materials provided with the distribution. 1436285Sbrian * 3. All advertising materials mentioning features or use of this software 1536285Sbrian * must display the following acknowledgement: 1636285Sbrian * This product includes software developed by John Birrell. 1736285Sbrian * 4. Neither the name of the author nor the names of any co-contributors 1836285Sbrian * may be used to endorse or promote products derived from this software 1950479Speter * without specific prior written permission. 2036285Sbrian * 2136285Sbrian * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 2236285Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2346686Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2436285Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2546686Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2646686Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2746686Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2846686Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2946686Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3036285Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3149472Sbrian * SUCH DAMAGE. 3249472Sbrian * 3349472Sbrian * $FreeBSD: head/lib/libthr/thread/thr_init.c 156901 2006-03-20 03:14:14Z davidxu $ 3449472Sbrian */ 3549472Sbrian 3649472Sbrian#include "namespace.h" 3746686Sbrian#include <sys/types.h> 3849472Sbrian#include <sys/signalvar.h> 3949472Sbrian#include <sys/ioctl.h> 4049472Sbrian#include <sys/sysctl.h> 4149472Sbrian#include <sys/ttycom.h> 4249472Sbrian#include <sys/mman.h> 4346686Sbrian#include <errno.h> 4446686Sbrian#include <fcntl.h> 4546686Sbrian#include <paths.h> 4647061Sbrian#include <pthread.h> 4749472Sbrian#include <pthread_np.h> 4846686Sbrian#include <signal.h> 4946686Sbrian#include <stdlib.h> 5046686Sbrian#include <string.h> 5147061Sbrian#include <time.h> 5247061Sbrian#include <unistd.h> 5347061Sbrian#include "un-namespace.h" 5447061Sbrian 5547769Sbrian#include "libc_private.h" 5646686Sbrian#include "thr_private.h" 5746686Sbrian 5846686Sbrianvoid *_usrstack; 5946686Sbrianstruct pthread *_thr_initial; 6036285Sbrianint _thr_scope_system; 6136285Sbrianint _libthr_debug; 6236285Sbrianint _thread_event_mask; 6336285Sbrianstruct pthread *_thread_last_event; 6436285Sbrianpthreadlist _thread_list = TAILQ_HEAD_INITIALIZER(_thread_list); 6536285Sbrianpthreadlist _thread_gc_list = TAILQ_HEAD_INITIALIZER(_thread_gc_list); 6636285Sbrianint _thread_active_threads = 1; 6736285Sbrianatfork_head _thr_atfork_list = TAILQ_HEAD_INITIALIZER(_thr_atfork_list); 6836285Sbrianumtx_t _thr_atfork_lock; 6936285Sbrian 7036285Sbrianstruct pthread_attr _pthread_attr_default = { 7136285Sbrian .sched_policy = SCHED_RR, 7245264Sbrian .sched_inherit = 0, 7345264Sbrian .sched_interval = TIMESLICE_USEC, 7445264Sbrian .prio = THR_DEFAULT_PRIORITY, 7545264Sbrian .suspend = THR_CREATE_RUNNING, 7645264Sbrian .flags = PTHREAD_SCOPE_SYSTEM, 7747682Sbrian .arg_attr = NULL, 7836285Sbrian .cleanup_attr = NULL, 7936285Sbrian .stackaddr_attr = NULL, 8036285Sbrian .stacksize_attr = THR_STACK_DEFAULT, 8147061Sbrian .guardsize_attr = 0 8236467Sbrian}; 8336285Sbrian 8447061Sbrianstruct pthread_mutex_attr _pthread_mutexattr_default = { 8547061Sbrian .m_type = PTHREAD_MUTEX_DEFAULT, 8646686Sbrian .m_protocol = PTHREAD_PRIO_NONE, 8746686Sbrian .m_ceiling = 0, 8846686Sbrian .m_flags = 0 8946686Sbrian}; 9036285Sbrian 9146102Sbrian/* Default condition variable attributes: */ 9246102Sbrianstruct pthread_cond_attr _pthread_condattr_default = { 9344073Sbrian .c_pshared = PTHREAD_PROCESS_PRIVATE, 9444073Sbrian .c_clockid = CLOCK_REALTIME 9544073Sbrian}; 9644073Sbrian 9736285Sbrianpid_t _thr_pid; 9836285Sbrianint _thr_guard_default; 9936285Sbrianint _thr_stack_default = THR_STACK_DEFAULT; 10036285Sbrianint _thr_stack_initial = THR_STACK_INITIAL; 10136285Sbrianint _thr_page_size; 10236285Sbrianint _gc_count; 10336285Sbrianumtx_t _mutex_static_lock; 10436285Sbrianumtx_t _cond_static_lock; 10536285Sbrianumtx_t _rwlock_static_lock; 10636285Sbrianumtx_t _keytable_lock; 10736285Sbrianumtx_t _thr_list_lock; 10836285Sbrianumtx_t _thr_event_lock; 10947061Sbrian 11047061Sbrianint __pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *); 11147061Sbrianint __pthread_mutex_lock(pthread_mutex_t *); 11247061Sbrianint __pthread_mutex_trylock(pthread_mutex_t *); 11346686Sbrianvoid _thread_init_hack(void) __attribute__ ((constructor)); 11446686Sbrian 11546686Sbrianstatic void init_private(void); 11646686Sbrianstatic void init_main_thread(struct pthread *thread); 11746686Sbrian 11846686Sbrian/* 11946686Sbrian * All weak references used within libc should be in this table. 12046686Sbrian * This is so that static libraries will work. 12146686Sbrian */ 12246686SbrianSTATIC_LIB_REQUIRE(_accept); 12346686SbrianSTATIC_LIB_REQUIRE(_bind); 12446686SbrianSTATIC_LIB_REQUIRE(_close); 12546686SbrianSTATIC_LIB_REQUIRE(_connect); 12646686SbrianSTATIC_LIB_REQUIRE(_dup); 12746686SbrianSTATIC_LIB_REQUIRE(_dup2); 12846686SbrianSTATIC_LIB_REQUIRE(_execve); 12946686SbrianSTATIC_LIB_REQUIRE(_fcntl); 13036285SbrianSTATIC_LIB_REQUIRE(_flock); 13136285SbrianSTATIC_LIB_REQUIRE(_flockfile); 13236285SbrianSTATIC_LIB_REQUIRE(_fstat); 13346686SbrianSTATIC_LIB_REQUIRE(_fstatfs); 13436285SbrianSTATIC_LIB_REQUIRE(_fsync); 13536285SbrianSTATIC_LIB_REQUIRE(_getdirentries); 13636285SbrianSTATIC_LIB_REQUIRE(_getlogin); 13746686SbrianSTATIC_LIB_REQUIRE(_getpeername); 13846686SbrianSTATIC_LIB_REQUIRE(_getsockname); 13936285SbrianSTATIC_LIB_REQUIRE(_getsockopt); 14036285SbrianSTATIC_LIB_REQUIRE(_ioctl); 14136285SbrianSTATIC_LIB_REQUIRE(_kevent); 14236285SbrianSTATIC_LIB_REQUIRE(_listen); 14336285SbrianSTATIC_LIB_REQUIRE(_nanosleep); 14438544SbrianSTATIC_LIB_REQUIRE(_open); 14547461SbrianSTATIC_LIB_REQUIRE(_pthread_getspecific); 14647061SbrianSTATIC_LIB_REQUIRE(_pthread_key_create); 14747769SbrianSTATIC_LIB_REQUIRE(_pthread_key_delete); 14849472SbrianSTATIC_LIB_REQUIRE(_pthread_mutex_destroy); 149STATIC_LIB_REQUIRE(_pthread_mutex_init); 150STATIC_LIB_REQUIRE(_pthread_mutex_lock); 151STATIC_LIB_REQUIRE(_pthread_mutex_trylock); 152STATIC_LIB_REQUIRE(_pthread_mutex_unlock); 153STATIC_LIB_REQUIRE(_pthread_mutexattr_init); 154STATIC_LIB_REQUIRE(_pthread_mutexattr_destroy); 155STATIC_LIB_REQUIRE(_pthread_mutexattr_settype); 156STATIC_LIB_REQUIRE(_pthread_once); 157STATIC_LIB_REQUIRE(_pthread_setspecific); 158STATIC_LIB_REQUIRE(_read); 159STATIC_LIB_REQUIRE(_readv); 160STATIC_LIB_REQUIRE(_recvfrom); 161STATIC_LIB_REQUIRE(_recvmsg); 162STATIC_LIB_REQUIRE(_select); 163STATIC_LIB_REQUIRE(_sendmsg); 164STATIC_LIB_REQUIRE(_sendto); 165STATIC_LIB_REQUIRE(_setsockopt); 166STATIC_LIB_REQUIRE(_sigaction); 167STATIC_LIB_REQUIRE(_sigprocmask); 168STATIC_LIB_REQUIRE(_sigsuspend); 169STATIC_LIB_REQUIRE(_socket); 170STATIC_LIB_REQUIRE(_socketpair); 171STATIC_LIB_REQUIRE(_thread_init_hack); 172STATIC_LIB_REQUIRE(_wait4); 173STATIC_LIB_REQUIRE(_write); 174STATIC_LIB_REQUIRE(_writev); 175 176/* 177 * These are needed when linking statically. All references within 178 * libgcc (and in the future libc) to these routines are weak, but 179 * if they are not (strongly) referenced by the application or other 180 * libraries, then the actual functions will not be loaded. 181 */ 182STATIC_LIB_REQUIRE(_pthread_once); 183STATIC_LIB_REQUIRE(_pthread_key_create); 184STATIC_LIB_REQUIRE(_pthread_key_delete); 185STATIC_LIB_REQUIRE(_pthread_getspecific); 186STATIC_LIB_REQUIRE(_pthread_setspecific); 187STATIC_LIB_REQUIRE(_pthread_mutex_init); 188STATIC_LIB_REQUIRE(_pthread_mutex_destroy); 189STATIC_LIB_REQUIRE(_pthread_mutex_lock); 190STATIC_LIB_REQUIRE(_pthread_mutex_trylock); 191STATIC_LIB_REQUIRE(_pthread_mutex_unlock); 192STATIC_LIB_REQUIRE(_pthread_create); 193 194/* Pull in all symbols required by libthread_db */ 195STATIC_LIB_REQUIRE(_thread_state_running); 196 197#define DUAL_ENTRY(entry) \ 198 (pthread_func_t)entry, (pthread_func_t)entry 199 200static pthread_func_t jmp_table[][2] = { 201 {DUAL_ENTRY(_pthread_atfork)}, /* PJT_ATFORK */ 202 {DUAL_ENTRY(_pthread_attr_destroy)}, /* PJT_ATTR_DESTROY */ 203 {DUAL_ENTRY(_pthread_attr_getdetachstate)}, /* PJT_ATTR_GETDETACHSTATE */ 204 {DUAL_ENTRY(_pthread_attr_getguardsize)}, /* PJT_ATTR_GETGUARDSIZE */ 205 {DUAL_ENTRY(_pthread_attr_getinheritsched)}, /* PJT_ATTR_GETINHERITSCHED */ 206 {DUAL_ENTRY(_pthread_attr_getschedparam)}, /* PJT_ATTR_GETSCHEDPARAM */ 207 {DUAL_ENTRY(_pthread_attr_getschedpolicy)}, /* PJT_ATTR_GETSCHEDPOLICY */ 208 {DUAL_ENTRY(_pthread_attr_getscope)}, /* PJT_ATTR_GETSCOPE */ 209 {DUAL_ENTRY(_pthread_attr_getstackaddr)}, /* PJT_ATTR_GETSTACKADDR */ 210 {DUAL_ENTRY(_pthread_attr_getstacksize)}, /* PJT_ATTR_GETSTACKSIZE */ 211 {DUAL_ENTRY(_pthread_attr_init)}, /* PJT_ATTR_INIT */ 212 {DUAL_ENTRY(_pthread_attr_setdetachstate)}, /* PJT_ATTR_SETDETACHSTATE */ 213 {DUAL_ENTRY(_pthread_attr_setguardsize)}, /* PJT_ATTR_SETGUARDSIZE */ 214 {DUAL_ENTRY(_pthread_attr_setinheritsched)}, /* PJT_ATTR_SETINHERITSCHED */ 215 {DUAL_ENTRY(_pthread_attr_setschedparam)}, /* PJT_ATTR_SETSCHEDPARAM */ 216 {DUAL_ENTRY(_pthread_attr_setschedpolicy)}, /* PJT_ATTR_SETSCHEDPOLICY */ 217 {DUAL_ENTRY(_pthread_attr_setscope)}, /* PJT_ATTR_SETSCOPE */ 218 {DUAL_ENTRY(_pthread_attr_setstackaddr)}, /* PJT_ATTR_SETSTACKADDR */ 219 {DUAL_ENTRY(_pthread_attr_setstacksize)}, /* PJT_ATTR_SETSTACKSIZE */ 220 {DUAL_ENTRY(_pthread_cancel)}, /* PJT_CANCEL */ 221 {DUAL_ENTRY(_pthread_cleanup_pop)}, /* PJT_CLEANUP_POP */ 222 {DUAL_ENTRY(_pthread_cleanup_push)}, /* PJT_CLEANUP_PUSH */ 223 {DUAL_ENTRY(_pthread_cond_broadcast)}, /* PJT_COND_BROADCAST */ 224 {DUAL_ENTRY(_pthread_cond_destroy)}, /* PJT_COND_DESTROY */ 225 {DUAL_ENTRY(_pthread_cond_init)}, /* PJT_COND_INIT */ 226 {DUAL_ENTRY(_pthread_cond_signal)}, /* PJT_COND_SIGNAL */ 227 {DUAL_ENTRY(_pthread_cond_timedwait)}, /* PJT_COND_TIMEDWAIT */ 228 {(pthread_func_t)__pthread_cond_wait, 229 (pthread_func_t)_pthread_cond_wait}, /* PJT_COND_WAIT */ 230 {DUAL_ENTRY(_pthread_detach)}, /* PJT_DETACH */ 231 {DUAL_ENTRY(_pthread_equal)}, /* PJT_EQUAL */ 232 {DUAL_ENTRY(_pthread_exit)}, /* PJT_EXIT */ 233 {DUAL_ENTRY(_pthread_getspecific)}, /* PJT_GETSPECIFIC */ 234 {DUAL_ENTRY(_pthread_join)}, /* PJT_JOIN */ 235 {DUAL_ENTRY(_pthread_key_create)}, /* PJT_KEY_CREATE */ 236 {DUAL_ENTRY(_pthread_key_delete)}, /* PJT_KEY_DELETE*/ 237 {DUAL_ENTRY(_pthread_kill)}, /* PJT_KILL */ 238 {DUAL_ENTRY(_pthread_main_np)}, /* PJT_MAIN_NP */ 239 {DUAL_ENTRY(_pthread_mutexattr_destroy)}, /* PJT_MUTEXATTR_DESTROY */ 240 {DUAL_ENTRY(_pthread_mutexattr_init)}, /* PJT_MUTEXATTR_INIT */ 241 {DUAL_ENTRY(_pthread_mutexattr_settype)}, /* PJT_MUTEXATTR_SETTYPE */ 242 {DUAL_ENTRY(_pthread_mutex_destroy)}, /* PJT_MUTEX_DESTROY */ 243 {DUAL_ENTRY(_pthread_mutex_init)}, /* PJT_MUTEX_INIT */ 244 {(pthread_func_t)__pthread_mutex_lock, 245 (pthread_func_t)_pthread_mutex_lock}, /* PJT_MUTEX_LOCK */ 246 {(pthread_func_t)__pthread_mutex_trylock, 247 (pthread_func_t)_pthread_mutex_trylock},/* PJT_MUTEX_TRYLOCK */ 248 {DUAL_ENTRY(_pthread_mutex_unlock)}, /* PJT_MUTEX_UNLOCK */ 249 {DUAL_ENTRY(_pthread_once)}, /* PJT_ONCE */ 250 {DUAL_ENTRY(_pthread_rwlock_destroy)}, /* PJT_RWLOCK_DESTROY */ 251 {DUAL_ENTRY(_pthread_rwlock_init)}, /* PJT_RWLOCK_INIT */ 252 {DUAL_ENTRY(_pthread_rwlock_rdlock)}, /* PJT_RWLOCK_RDLOCK */ 253 {DUAL_ENTRY(_pthread_rwlock_tryrdlock)},/* PJT_RWLOCK_TRYRDLOCK */ 254 {DUAL_ENTRY(_pthread_rwlock_trywrlock)},/* PJT_RWLOCK_TRYWRLOCK */ 255 {DUAL_ENTRY(_pthread_rwlock_unlock)}, /* PJT_RWLOCK_UNLOCK */ 256 {DUAL_ENTRY(_pthread_rwlock_wrlock)}, /* PJT_RWLOCK_WRLOCK */ 257 {DUAL_ENTRY(_pthread_self)}, /* PJT_SELF */ 258 {DUAL_ENTRY(_pthread_setcancelstate)}, /* PJT_SETCANCELSTATE */ 259 {DUAL_ENTRY(_pthread_setcanceltype)}, /* PJT_SETCANCELTYPE */ 260 {DUAL_ENTRY(_pthread_setspecific)}, /* PJT_SETSPECIFIC */ 261 {DUAL_ENTRY(_pthread_sigmask)}, /* PJT_SIGMASK */ 262 {DUAL_ENTRY(_pthread_testcancel)} /* PJT_TESTCANCEL */ 263}; 264 265static int init_once = 0; 266 267/* 268 * For the shared version of the threads library, the above is sufficient. 269 * But for the archive version of the library, we need a little bit more. 270 * Namely, we must arrange for this particular module to be pulled in from 271 * the archive library at link time. To accomplish that, we define and 272 * initialize a variable, "_thread_autoinit_dummy_decl". This variable is 273 * referenced (as an extern) from libc/stdlib/exit.c. This will always 274 * create a need for this module, ensuring that it is present in the 275 * executable. 276 */ 277extern int _thread_autoinit_dummy_decl; 278int _thread_autoinit_dummy_decl = 0; 279 280void 281_thread_init_hack(void) 282{ 283 284 _libpthread_init(NULL); 285} 286 287 288/* 289 * Threaded process initialization. 290 * 291 * This is only called under two conditions: 292 * 293 * 1) Some thread routines have detected that the library hasn't yet 294 * been initialized (_thr_initial == NULL && curthread == NULL), or 295 * 296 * 2) An explicit call to reinitialize after a fork (indicated 297 * by curthread != NULL) 298 */ 299void 300_libpthread_init(struct pthread *curthread) 301{ 302 int fd, first = 0; 303 sigset_t sigset, oldset; 304 305 /* Check if this function has already been called: */ 306 if ((_thr_initial != NULL) && (curthread == NULL)) 307 /* Only initialize the threaded application once. */ 308 return; 309 310 /* 311 * Check the size of the jump table to make sure it is preset 312 * with the correct number of entries. 313 */ 314 if (sizeof(jmp_table) != (sizeof(pthread_func_t) * PJT_MAX * 2)) 315 PANIC("Thread jump table not properly initialized"); 316 memcpy(__thr_jtable, jmp_table, sizeof(jmp_table)); 317 318 /* 319 * Check for the special case of this process running as 320 * or in place of init as pid = 1: 321 */ 322 if ((_thr_pid = getpid()) == 1) { 323 /* 324 * Setup a new session for this process which is 325 * assumed to be running as root. 326 */ 327 if (setsid() == -1) 328 PANIC("Can't set session ID"); 329 if (revoke(_PATH_CONSOLE) != 0) 330 PANIC("Can't revoke console"); 331 if ((fd = __sys_open(_PATH_CONSOLE, O_RDWR)) < 0) 332 PANIC("Can't open console"); 333 if (setlogin("root") == -1) 334 PANIC("Can't set login to root"); 335 if (__sys_ioctl(fd, TIOCSCTTY, (char *) NULL) == -1) 336 PANIC("Can't set controlling terminal"); 337 } 338 339 /* Initialize pthread private data. */ 340 init_private(); 341 342 /* Set the initial thread. */ 343 if (curthread == NULL) { 344 first = 1; 345 /* Create and initialize the initial thread. */ 346 curthread = _thr_alloc(NULL); 347 if (curthread == NULL) 348 PANIC("Can't allocate initial thread"); 349 init_main_thread(curthread); 350 } 351 /* 352 * Add the thread to the thread list queue. 353 */ 354 THR_LIST_ADD(curthread); 355 _thread_active_threads = 1; 356 357 /* Setup the thread specific data */ 358 _tcb_set(curthread->tcb); 359 360 if (first) { 361 SIGFILLSET(sigset); 362 SIGDELSET(sigset, SIGTRAP); 363 __sys_sigprocmask(SIG_SETMASK, &sigset, &oldset); 364 _thr_signal_init(); 365 _thr_initial = curthread; 366 SIGDELSET(oldset, SIGCANCEL); 367 __sys_sigprocmask(SIG_SETMASK, &oldset, NULL); 368 if (_thread_event_mask & TD_CREATE) 369 _thr_report_creation(curthread, curthread); 370 } 371} 372 373/* 374 * This function and pthread_create() do a lot of the same things. 375 * It'd be nice to consolidate the common stuff in one place. 376 */ 377static void 378init_main_thread(struct pthread *thread) 379{ 380 /* Setup the thread attributes. */ 381 thr_self(&thread->tid); 382 thread->attr = _pthread_attr_default; 383 /* 384 * Set up the thread stack. 385 * 386 * Create a red zone below the main stack. All other stacks 387 * are constrained to a maximum size by the parameters 388 * passed to mmap(), but this stack is only limited by 389 * resource limits, so this stack needs an explicitly mapped 390 * red zone to protect the thread stack that is just beyond. 391 */ 392 if (mmap((void *)_usrstack - _thr_stack_initial - 393 _thr_guard_default, _thr_guard_default, 0, MAP_ANON, 394 -1, 0) == MAP_FAILED) 395 PANIC("Cannot allocate red zone for initial thread"); 396 397 /* 398 * Mark the stack as an application supplied stack so that it 399 * isn't deallocated. 400 * 401 * XXX - I'm not sure it would hurt anything to deallocate 402 * the main thread stack because deallocation doesn't 403 * actually free() it; it just puts it in the free 404 * stack queue for later reuse. 405 */ 406 thread->attr.stackaddr_attr = (void *)_usrstack - _thr_stack_initial; 407 thread->attr.stacksize_attr = _thr_stack_initial; 408 thread->attr.guardsize_attr = _thr_guard_default; 409 thread->attr.flags |= THR_STACK_USER; 410 411 /* 412 * Write a magic value to the thread structure 413 * to help identify valid ones: 414 */ 415 thread->magic = THR_MAGIC; 416 417 thread->cancelflags = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED; 418 thr_set_name(thread->tid, "initial thread"); 419 420 /* Default the priority of the initial thread: */ 421 thread->base_priority = THR_DEFAULT_PRIORITY; 422 thread->active_priority = THR_DEFAULT_PRIORITY; 423 thread->inherited_priority = 0; 424 425 /* Initialize the mutex queue: */ 426 TAILQ_INIT(&thread->mutexq); 427 TAILQ_INIT(&thread->pri_mutexq); 428 429 thread->state = PS_RUNNING; 430 431 /* Others cleared to zero by thr_alloc() */ 432} 433 434static void 435init_private(void) 436{ 437 size_t len; 438 int mib[2]; 439 440 _thr_umtx_init(&_mutex_static_lock); 441 _thr_umtx_init(&_cond_static_lock); 442 _thr_umtx_init(&_rwlock_static_lock); 443 _thr_umtx_init(&_keytable_lock); 444 _thr_umtx_init(&_thr_atfork_lock); 445 _thr_umtx_init(&_thr_event_lock); 446 _thr_once_init(); 447 _thr_spinlock_init(); 448 _thr_list_init(); 449 450 /* 451 * Avoid reinitializing some things if they don't need to be, 452 * e.g. after a fork(). 453 */ 454 if (init_once == 0) { 455 /* Find the stack top */ 456 mib[0] = CTL_KERN; 457 mib[1] = KERN_USRSTACK; 458 len = sizeof (_usrstack); 459 if (sysctl(mib, 2, &_usrstack, &len, NULL, 0) == -1) 460 PANIC("Cannot get kern.usrstack from sysctl"); 461 _thr_page_size = getpagesize(); 462 _thr_guard_default = _thr_page_size; 463 _pthread_attr_default.guardsize_attr = _thr_guard_default; 464 _pthread_attr_default.stacksize_attr = _thr_stack_default; 465 466 TAILQ_INIT(&_thr_atfork_list); 467#ifdef SYSTEM_SCOPE_ONLY 468 _thr_scope_system = 1; 469#else 470 if (getenv("LIBPTHREAD_SYSTEM_SCOPE") != NULL) 471 _thr_scope_system = 1; 472 else if (getenv("LIBPTHREAD_PROCESS_SCOPE") != NULL) 473 _thr_scope_system = -1; 474#endif 475 } 476 init_once = 1; 477} 478