1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _THR_UBERDATA_H 28 #define _THR_UBERDATA_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <stdlib.h> 33 #include <unistd.h> 34 #include <sys/types.h> 35 #include <fcntl.h> 36 #include <string.h> 37 #include <signal.h> 38 #include <ucontext.h> 39 #include <thread.h> 40 #include <pthread.h> 41 #include <link.h> 42 #include <sys/resource.h> 43 #include <sys/lwp.h> 44 #include <errno.h> 45 #include <sys/asm_linkage.h> 46 #include <sys/regset.h> 47 #include <sys/fcntl.h> 48 #include <sys/mman.h> 49 #include <synch.h> 50 #include <door.h> 51 #include <limits.h> 52 #include <sys/synch32.h> 53 #include <schedctl.h> 54 #include <sys/priocntl.h> 55 #include <thread_db.h> 56 #include "libc_int.h" 57 #include "tdb_agent.h" 58 59 /* belongs in <pthread.h> */ 60 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 61 #define PTHREAD_CREATE_NONDAEMON_NP 0 62 63 /* 64 * This is an implementation-specific include file for threading support. 65 * It is not to be seen by the clients of the library. 66 * 67 * This file also describes uberdata in libc. 68 * 69 * The term "uberdata" refers to data that is unique and visible across 70 * all link maps. The name is meant to imply that such data is truly 71 * global, not just locally global to a particular link map. 72 * 73 * See the Linker and Libraries Guide for a full description of alternate 74 * link maps and how they are set up and used. 75 * 76 * Alternate link maps implement multiple global namespaces within a single 77 * process. There may be multiple instances of identical dynamic libraries 78 * loaded in a process's address space at the same time, each on a different 79 * link map (as determined by the dynamic linker), each with its own set of 80 * global variables. Which particular instance of a global variable is seen 81 * by a thread running in the process is determined by the link map on which 82 * the thread happens to be executing at the time. 83 * 84 * However, there are aspects of a process that are unique across all 85 * link maps, in particular the structures used to implement threads 86 * of control (in Sparc terminology, there is only one %g7 regardless 87 * of the link map on which the thread is executing). 88 * 89 * All uberdata is referenced from a base pointer in the thread's ulwp_t 90 * structure (which is also uberdata). All allocations and deallocations 91 * of uberdata are made via the uberdata-aware lmalloc() and lfree() 92 * interfaces (malloc() and free() are simply locally-global). 93 */ 94 95 /* 96 * Special libc-private access to errno. 97 * We do this so that references to errno do not invoke the dynamic linker. 98 */ 99 #undef errno 100 #define errno (*curthread->ul_errnop) 101 102 /* 103 * See <sys/synch32.h> for the reasons for these values 104 * and why they are different for sparc and intel. 105 */ 106 #if defined(__sparc) 107 /* lock.lock64.pad[x] 4 5 6 7 */ 108 #define LOCKMASK 0xff000000 109 #define WAITERMASK 0x000000ff 110 #define WAITER 0x00000001 111 #define LOCKSET 0xff 112 #define LOCKCLEAR 0 113 #elif defined(__x86) 114 /* lock.lock64.pad[x] 7 6 5 4 */ 115 #define LOCKMASK 0xff000000 116 #define WAITERMASK 0x00ff0000 117 #define WAITER 0x00010000 118 #define LOCKSET 0x01 119 #define LOCKCLEAR 0 120 #else 121 #error "neither __sparc nor __x86 is defined" 122 #endif 123 124 /* 125 * Fetch the owner of a USYNC_THREAD mutex. 126 * Don't use this with process-shared mutexes; 127 * the owing thread may be in a different process. 128 */ 129 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 130 131 /* 132 * Test if a thread owns a USYNC_THREAD mutex. This is inappropriate 133 * for a process-shared (USYNC_PROCESS | USYNC_PROCESS_ROBUST) mutex. 134 * The 'mp' argument must not have side-effects since it is evaluated twice. 135 */ 136 #define MUTEX_OWNED(mp, thrp) \ 137 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 138 139 140 /* 141 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 142 * collection of lock statistics by a debugger or other collecting tool. 143 * 144 * uberflags.uf_thread_error_detection is set by an environment variable: 145 * _THREAD_ERROR_DETECTION 146 * 0 == no detection of locking primitive errors. 147 * 1 == detect errors and issue a warning message. 148 * 2 == detect errors, issue a warning message, and dump core. 149 * 150 * We bundle these together in uberflags.uf_trs_ted to make a test of either 151 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 152 * 153 * uberflags.uf_mt is set non-zero when the first thread (in addition 154 * to the main thread) is created. 155 * 156 * We bundle all these flags together in uberflags.uf_all to make a test 157 * of any being non-zero a single memory reference (again, for speed). 158 */ 159 typedef union { 160 int uf_all; /* combined all flags */ 161 struct { 162 short h_pad; 163 short h_trs_ted; /* combined reg sync & error detect */ 164 } uf_h; 165 struct { 166 char x_mt; 167 char x_pad; 168 char x_tdb_register_sync; 169 char x_thread_error_detection; 170 } uf_x; 171 } uberflags_t; 172 173 #define uf_mt uf_x.x_mt 174 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 175 #define uf_thread_error_detection uf_x.x_thread_error_detection 176 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 177 178 /* 179 * NOTE WELL: 180 * To enable further optimization, the "ul_schedctl_called" member 181 * of the ulwp_t structure (below) serves double-duty: 182 * 1. If NULL, it means that the thread must call __schedctl() 183 * to set up its schedctl mappings before acquiring a mutex. 184 * This is required by the implementation of adaptive mutex locking. 185 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 186 * uberflags can be made without additional memory references. 187 * This allows the common case of _mutex_lock() and _mutex_unlock() for 188 * USYNC_THREAD mutexes with no error detection and no lock statistics 189 * to be optimized for speed. 190 */ 191 192 193 /* double the default stack size for 64-bit processes */ 194 #ifdef _LP64 195 #define MINSTACK (8 * 1024) 196 #define DEFAULTSTACK (2 * 1024 * 1024) 197 #else 198 #define MINSTACK (4 * 1024) 199 #define DEFAULTSTACK (1024 * 1024) 200 #endif 201 #define TSD_NKEYS _POSIX_THREAD_KEYS_MAX 202 203 #define THREAD_MIN_PRIORITY 0 204 #define THREAD_MAX_PRIORITY 127 205 206 #define PRIO_SET 0 /* set priority and policy */ 207 #define PRIO_SET_PRIO 1 /* set priority only */ 208 #define PRIO_INHERIT 2 209 #define PRIO_DISINHERIT 3 210 211 struct pcclass { 212 short pcc_state; 213 pri_t pcc_primin; 214 pri_t pcc_primax; 215 pcinfo_t pcc_info; 216 }; 217 extern struct pcclass ts_class, rt_class; 218 219 #define MUTEX_TRY 0 220 #define MUTEX_LOCK 1 221 222 #if defined(__x86) 223 224 typedef struct { /* structure returned by fnstenv */ 225 int fctrl; /* control word */ 226 int fstat; /* status word (flags, etc) */ 227 int ftag; /* tag of which regs busy */ 228 int misc[4]; /* other stuff, 28 bytes total */ 229 } fpuenv_t; 230 231 #ifdef _SYSCALL32 232 typedef fpuenv_t fpuenv32_t; 233 #endif /* _SYSCALL32 */ 234 235 #elif defined(__sparc) 236 237 typedef struct { /* fp state structure */ 238 greg_t fsr; 239 greg_t fpu_en; 240 } fpuenv_t; 241 242 #ifdef _SYSCALL32 243 typedef struct { 244 greg32_t fsr; 245 greg32_t fpu_en; 246 } fpuenv32_t; 247 #endif /* _SYSCALL32 */ 248 249 #endif /* __x86 */ 250 251 #if defined(__x86) 252 extern void ht_pause(void); /* "pause" instruction */ 253 #define SMT_PAUSE() ht_pause() 254 #else 255 #define SMT_PAUSE() 256 #endif /* __x86 */ 257 258 /* 259 * Cleanup handler related data. 260 * This structure is exported as _cleanup_t in pthread.h. 261 * pthread.h exports only the size of this structure, so check 262 * _cleanup_t in pthread.h before making any change here. 263 */ 264 typedef struct __cleanup { 265 struct __cleanup *next; /* pointer to next handler */ 266 caddr_t fp; /* current frame pointer */ 267 void (*func)(void *); /* cleanup handler address */ 268 void *arg; /* handler's argument */ 269 } __cleanup_t; 270 271 /* 272 * Thread-Specific Data (TSD) 273 * TSD_NFAST includes the invalid key zero, so there 274 * are really only (TSD_NFAST - 1) fast key slots. 275 */ 276 typedef void (*PFrV)(void *); 277 #define TSD_UNALLOCATED ((PFrV)1) 278 #define TSD_NFAST 9 279 280 /* 281 * The tsd union is designed to burn a little memory (9 words) to make 282 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 283 * end of the pad region to increase the likelihood that it falls on the 284 * same cache line as the data. 285 */ 286 typedef union tsd { 287 uint_t tsd_nalloc; /* Amount of allocated storage */ 288 void *tsd_pad[TSD_NFAST]; 289 void *tsd_data[1]; 290 } tsd_t; 291 292 typedef struct { 293 mutex_t tsdm_lock; /* Lock protecting the data */ 294 uint_t tsdm_nkeys; /* Number of allocated keys */ 295 uint_t tsdm_nused; /* Number of used keys */ 296 PFrV *tsdm_destro; /* Per-key destructors */ 297 char tsdm_pad[64 - /* pad to 64 bytes */ 298 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 299 } tsd_metadata_t; 300 301 #ifdef _SYSCALL32 302 typedef union tsd32 { 303 uint_t tsd_nalloc; /* Amount of allocated storage */ 304 caddr32_t tsd_pad[TSD_NFAST]; 305 caddr32_t tsd_data[1]; 306 } tsd32_t; 307 308 typedef struct { 309 mutex_t tsdm_lock; /* Lock protecting the data */ 310 uint_t tsdm_nkeys; /* Number of allocated keys */ 311 uint_t tsdm_nused; /* Number of used keys */ 312 caddr32_t tsdm_destro; /* Per-key destructors */ 313 char tsdm_pad[64 - /* pad to 64 bytes */ 314 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 315 } tsd_metadata32_t; 316 #endif /* _SYSCALL32 */ 317 318 319 /* 320 * Thread-Local Storage (TLS) 321 */ 322 typedef struct { 323 void *tls_data; 324 size_t tls_size; 325 } tls_t; 326 327 typedef struct { 328 mutex_t tls_lock; /* Lock protecting the data */ 329 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 330 tls_t static_tls; /* Template for static TLS */ 331 char tls_pad[64 - /* pad to 64 bytes */ 332 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 333 } tls_metadata_t; 334 335 #ifdef _SYSCALL32 336 typedef struct { 337 caddr32_t tls_data; 338 size32_t tls_size; 339 } tls32_t; 340 341 typedef struct { 342 mutex_t tls_lock; /* Lock protecting the data */ 343 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 344 tls32_t static_tls; /* Template for static TLS */ 345 char tls_pad[64 - /* pad to 64 bytes */ 346 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 347 } tls_metadata32_t; 348 #endif /* _SYSCALL32 */ 349 350 351 /* 352 * Sleep queues for USYNC_THREAD condvars and mutexes. 353 * The size and alignment is 64 bytes to reduce cache conflicts. 354 */ 355 typedef union { 356 uint64_t qh_64[8]; 357 struct { 358 mutex_t q_lock; 359 uint8_t q_qcnt; 360 uint8_t q_pad[7]; 361 uint64_t q_lockcount; 362 uint32_t q_qlen; 363 uint32_t q_qmax; 364 struct ulwp *q_head; 365 struct ulwp *q_tail; 366 } qh_qh; 367 } queue_head_t; 368 369 #define qh_lock qh_qh.q_lock 370 #define qh_qcnt qh_qh.q_qcnt 371 #define qh_lockcount qh_qh.q_lockcount 372 #define qh_qlen qh_qh.q_qlen 373 #define qh_qmax qh_qh.q_qmax 374 #define qh_head qh_qh.q_head 375 #define qh_tail qh_qh.q_tail 376 377 /* queue types passed to queue_lock() and enqueue() */ 378 #define MX 0 379 #define CV 1 380 #define FIFOQ 0x10 /* or'ing with FIFOQ asks for FIFO queueing */ 381 #define QHASHSIZE 512 382 #define QUEUE_HASH(wchan, type) \ 383 ((uint_t)((((uintptr_t)(wchan) >> 3) ^ ((uintptr_t)(wchan) >> 12)) \ 384 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 385 386 extern queue_head_t *queue_lock(void *, int); 387 extern void queue_unlock(queue_head_t *); 388 extern void enqueue(queue_head_t *, struct ulwp *, void *, int); 389 extern struct ulwp *dequeue(queue_head_t *, void *, int *); 390 extern struct ulwp *queue_waiter(queue_head_t *, void *); 391 extern uint8_t dequeue_self(queue_head_t *, void *); 392 extern void unsleep_self(void); 393 extern void spin_lock_set(mutex_t *); 394 extern void spin_lock_clear(mutex_t *); 395 396 /* 397 * Memory block for chain of owned ceiling mutexes. 398 */ 399 typedef struct mxchain { 400 struct mxchain *mxchain_next; 401 mutex_t *mxchain_mx; 402 } mxchain_t; 403 404 /* 405 * Pointer to an rwlock that is held for reading. 406 * Used in rw_rdlock() to allow a thread that already holds a read 407 * lock to acquire another read lock on the same rwlock even if 408 * there are writers waiting. This to avoid deadlock when acquiring 409 * a read lock more than once in the presence of pending writers. 410 * POSIX mandates this behavior. 411 */ 412 typedef struct { 413 void *rd_rwlock; /* the rwlock held for reading */ 414 size_t rd_count; /* count of read locks applied */ 415 } readlock_t; 416 417 #ifdef _SYSCALL32 418 typedef struct { 419 caddr32_t rd_rwlock; 420 size32_t rd_count; 421 } readlock32_t; 422 #endif /* _SYSCALL32 */ 423 424 /* 425 * Maximum number of read locks allowed for one thread on one rwlock. 426 * This could be as large as INT_MAX, but the SUSV3 test suite would 427 * take an inordinately long time to complete. This is big enough. 428 */ 429 #define READ_LOCK_MAX 100000 430 431 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 432 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 433 434 /* 435 * Round up an integral value to a multiple of 64 436 */ 437 #define roundup64(x) (-(-(x) & -64)) 438 439 /* 440 * NOTE: Whatever changes are made to ulwp_t must be 441 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 442 * 443 * NOTE: ul_self *must* be the first member of ulwp_t on x86 444 * Low-level x86 code relies on this. 445 */ 446 typedef struct ulwp { 447 /* 448 * These members always need to come first on sparc. 449 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 450 */ 451 #if defined(__sparc) 452 uint32_t ul_dinstr; /* scratch space for dtrace */ 453 uint32_t ul_padsparc0[15]; 454 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 455 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 456 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 457 uint32_t ul_dreturn; /* dtrace: return %o0 */ 458 #endif 459 struct ulwp *ul_self; /* pointer to self */ 460 #if defined(__i386) 461 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 462 #elif defined(__amd64) 463 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 464 #endif 465 struct uberdata *ul_uberdata; /* uber (super-global) data */ 466 tls_t ul_tls; /* dynamic thread-local storage base */ 467 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 468 struct ulwp *ul_back; /* protected by link_lock */ 469 struct ulwp *ul_next; /* list to keep track of stacks */ 470 struct ulwp *ul_hash; /* hash chain linked list */ 471 void *ul_rval; /* return value from thr_exit() */ 472 caddr_t ul_stk; /* mapping base of the stack */ 473 size_t ul_mapsiz; /* mapping size of the stack */ 474 size_t ul_guardsize; /* normally _lpagesize */ 475 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 476 size_t ul_stksiz; /* broken thr_stksegment() interface */ 477 stack_t ul_ustack; /* current stack boundaries */ 478 int ul_ix; /* hash index */ 479 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 480 pri_t ul_pri; /* priority known to the library */ 481 pri_t ul_mappedpri; /* priority known to the application */ 482 char ul_policy; /* scheduling policy */ 483 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 484 union { 485 struct { 486 char cursig; /* deferred signal number */ 487 char pleasestop; /* lwp requested to stop itself */ 488 } s; 489 short curplease; /* for testing both at once */ 490 } ul_cp; 491 char ul_stop; /* reason for stopping */ 492 char ul_signalled; /* this lwp was cond_signal()d */ 493 char ul_dead; /* this lwp has called thr_exit */ 494 char ul_unwind; /* posix: unwind C++ stack */ 495 char ul_detached; /* THR_DETACHED at thread_create() */ 496 /* or pthread_detach() was called */ 497 char ul_writer; /* sleeping in rw_wrlock() */ 498 char ul_stopping; /* set by curthread: stopping self */ 499 char ul_cancel_prologue; /* for _cancel_prologue() */ 500 short ul_preempt; /* no_preempt()/preempt() */ 501 short ul_savpreempt; /* pre-existing preempt value */ 502 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 503 char ul_main; /* thread is the main thread */ 504 char ul_fork; /* thread is performing a fork */ 505 char ul_primarymap; /* primary link-map is initialized */ 506 /* per-thread copies of the corresponding global variables */ 507 uchar_t ul_max_spinners; /* thread_max_spinners */ 508 char ul_door_noreserve; /* thread_door_noreserve */ 509 char ul_queue_fifo; /* thread_queue_fifo */ 510 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 511 char ul_error_detection; /* thread_error_detection */ 512 char ul_async_safe; /* thread_async_safe */ 513 char ul_pad1[2]; 514 int ul_adaptive_spin; /* thread_adaptive_spin */ 515 int ul_release_spin; /* thread_release_spin */ 516 int ul_queue_spin; /* thread_queue_spin */ 517 volatile int ul_critical; /* non-zero == in a critical region */ 518 int ul_sigdefer; /* non-zero == defer signals */ 519 int ul_vfork; /* thread is the child of vfork() */ 520 int ul_cancelable; /* _cancelon()/_canceloff() */ 521 char ul_cancel_pending; /* pthread_cancel() was called */ 522 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 523 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 524 char ul_save_async; /* saved copy of ul_cancel_async */ 525 char ul_mutator; /* lwp is a mutator (java interface) */ 526 char ul_created; /* created suspended */ 527 char ul_replace; /* replacement; must be free()d */ 528 uchar_t ul_nocancel; /* cancellation can't happen */ 529 int ul_errno; /* per-thread errno */ 530 int *ul_errnop; /* pointer to errno or self->ul_errno */ 531 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 532 uberflags_t *volatile ul_schedctl_called; /* ul_schedctl is set up */ 533 volatile sc_shared_t *volatile ul_schedctl; /* schedctl data */ 534 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 535 int ul_gs; /* x86 only: value of %gs/%fs */ 536 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 537 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 538 td_evbuf_t ul_td_evbuf; /* event buffer */ 539 char ul_td_events_enable; /* event mechanism enabled */ 540 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 541 char ul_qtype; /* MX or CV */ 542 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 543 int ul_usropts; /* flags given to thr_create() */ 544 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 545 void *ul_startarg; /* argument for start function */ 546 void *ul_wchan; /* synch object when sleeping */ 547 struct ulwp *ul_link; /* sleep queue link */ 548 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 549 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 550 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 551 pri_t ul_epri; /* effective scheduling priority */ 552 pri_t ul_emappedpri; /* effective mapped priority */ 553 uint_t ul_rdlocks; /* # of entries in ul_readlock array */ 554 /* 0 means there is but a single lock */ 555 union { /* single rwlock or pointer to array */ 556 readlock_t single; 557 readlock_t *array; 558 } ul_readlock; 559 /* PROBE_SUPPORT begin */ 560 void *ul_tpdp; 561 /* PROBE_SUPPORT end */ 562 ucontext_t *ul_siglink; /* pointer to previous context */ 563 uint_t ul_spin_lock_spin; /* spin lock statistics */ 564 uint_t ul_spin_lock_spin2; 565 uint_t ul_spin_lock_sleep; 566 uint_t ul_spin_lock_wakeup; 567 /* the following members *must* be last in the structure */ 568 /* they are discarded when ulwp is replaced on thr_exit() */ 569 sigset_t ul_sigmask; /* thread's current signal mask */ 570 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 571 siginfo_t ul_siginfo; /* deferred siginfo */ 572 mutex_t ul_spinlock; /* used when suspending/continuing */ 573 fpuenv_t ul_fpuenv; /* floating point state */ 574 uintptr_t ul_sp; /* stack pointer when blocked */ 575 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 576 #if defined(sparc) 577 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 578 #endif 579 } ulwp_t; 580 581 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 582 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 583 #define ul_curplease ul_cp.curplease /* for testing both at once */ 584 585 /* 586 * This is the size of a replacement ulwp, retained only for the benefit 587 * of thr_join(). The trailing members are unneeded for this purpose. 588 */ 589 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 590 591 /* 592 * Definitions for static initialization of signal sets, 593 * plus some sneaky optimizations in various places. 594 */ 595 596 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 597 598 #if (MAXSIG > 32 && MAXSIG <= 64) 599 #define FILLSET0 0xffffffffu 600 #define FILLSET1 ((1u << (MAXSIG - 32)) - 1) 601 #else 602 #error "fix me: MAXSIG out of bounds" 603 #endif 604 605 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 606 #define CANTMASK1 0 607 608 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 609 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 610 611 extern const sigset_t maskset; /* set of all maskable signals */ 612 613 extern int thread_adaptive_spin; 614 extern uint_t thread_max_spinners; 615 extern int thread_release_spin; 616 extern int thread_queue_spin; 617 extern int thread_queue_fifo; 618 extern int thread_queue_dump; 619 extern int thread_cond_wait_defer; 620 extern int thread_async_safe; 621 extern int thread_queue_verify; 622 623 /* 624 * pthread_atfork() related data, used to store atfork handlers. 625 */ 626 typedef struct atfork { 627 struct atfork *forw; /* forward pointer */ 628 struct atfork *back; /* backward pointer */ 629 void (*prepare)(void); /* pre-fork handler */ 630 void (*parent)(void); /* post-fork parent handler */ 631 void (*child)(void); /* post-fork child handler */ 632 } atfork_t; 633 634 /* 635 * Make our hot locks reside on private cache lines (64 bytes). 636 * pad_cond, pad_owner, and pad_count (aka fork_cond, fork_owner, 637 * and fork_count for _fork_lock) are used only in fork_lock_enter() 638 * to implement the special form of mutual exclusion therein. 639 */ 640 typedef struct { 641 mutex_t pad_lock; 642 cond_t pad_cond; 643 ulwp_t *pad_owner; 644 size_t pad_count; 645 char pad_pad[64 - (sizeof (mutex_t) + sizeof (cond_t) + 646 sizeof (ulwp_t *) + sizeof (size_t))]; 647 } pad_lock_t; 648 649 /* 650 * The threads hash table is used for fast lookup and locking of an active 651 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 652 * thr_hash_table_t structures, where N == 1 before the main thread creates 653 * the first additional thread and N == 1024 afterwards. Each element of the 654 * table is 64 bytes in size and alignment to reduce cache conflicts. 655 */ 656 typedef struct { 657 mutex_t hash_lock; /* lock per bucket */ 658 cond_t hash_cond; /* convar per bucket */ 659 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 660 char hash_pad[64 - /* pad out to 64 bytes */ 661 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 662 } thr_hash_table_t; 663 664 #ifdef _SYSCALL32 665 typedef struct { 666 mutex_t hash_lock; 667 cond_t hash_cond; 668 caddr32_t hash_bucket; 669 char hash_pad[64 - 670 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 671 } thr_hash_table32_t; 672 #endif /* _SYSCALL32 */ 673 674 675 /* 676 * siguaction members have 64-byte size and alignment. 677 * We know that sizeof (struct sigaction) is 32 bytes for 678 * both _ILP32 and _LP64, so we put the padding in the middle. 679 */ 680 typedef struct { 681 mutex_t sig_lock; 682 char sig_pad[64 - (sizeof (mutex_t) + sizeof (struct sigaction))]; 683 struct sigaction sig_uaction; 684 } siguaction_t; 685 686 #ifdef _SYSCALL32 687 typedef struct { 688 mutex_t sig_lock; 689 char sig_pad[64 - (sizeof (mutex_t) + sizeof (struct sigaction32))]; 690 struct sigaction32 sig_uaction; 691 } siguaction32_t; 692 #endif /* _SYSCALL32 */ 693 694 695 /* 696 * Bucket structures, used by lmalloc()/lfree(). 697 * See port/threads/alloc.c for details. 698 * A bucket's size and alignment is 64 bytes. 699 */ 700 typedef struct { 701 mutex_t bucket_lock; /* protects the free list allocations */ 702 void *free_list; /* LIFO list of blocks to allocate/free */ 703 size_t chunks; /* number of 64K blocks mmap()ed last time */ 704 char pad64[64 - /* pad out to 64 bytes */ 705 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 706 } bucket_t; 707 708 #ifdef _SYSCALL32 709 typedef struct { 710 mutex_t bucket_lock; 711 caddr32_t free_list; 712 size32_t chunks; 713 char pad64[64 - /* pad out to 64 bytes */ 714 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 715 } bucket32_t; 716 #endif /* _SYSCALL32 */ 717 718 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 719 720 721 /* 722 * atexit() data structures. 723 * See port/gen/atexit.c for details. 724 */ 725 typedef void (*_exithdlr_func_t) (void); 726 727 typedef struct _exthdlr { 728 struct _exthdlr *next; /* next in handler list */ 729 _exithdlr_func_t hdlr; /* handler itself */ 730 } _exthdlr_t; 731 732 typedef struct { 733 mutex_t exitfns_lock; 734 _exthdlr_t *head; 735 void *exit_frame_monitor; 736 char exit_pad[64 - /* pad out to 64 bytes */ 737 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 738 } atexit_root_t; 739 740 #ifdef _SYSCALL32 741 typedef struct { 742 mutex_t exitfns_lock; 743 caddr32_t head; 744 caddr32_t exit_frame_monitor; 745 char exit_pad[64 - /* pad out to 64 bytes */ 746 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 747 } atexit_root32_t; 748 #endif /* _SYSCALL32 */ 749 750 751 /* 752 * This is data that is global to all link maps (uberdata, aka super-global). 753 */ 754 typedef struct uberdata { 755 pad_lock_t _link_lock; 756 pad_lock_t _fork_lock; 757 pad_lock_t _tdb_hash_lock; 758 tdb_sync_stats_t tdb_hash_lock_stats; 759 siguaction_t siguaction[NSIG]; 760 bucket_t bucket[NBUCKETS]; 761 atexit_root_t atexit_root; 762 tsd_metadata_t tsd_metadata; 763 tls_metadata_t tls_metadata; 764 /* 765 * Every object before this point has size and alignment of 64 bytes. 766 * Don't add any other type of data before this point. 767 */ 768 char primary_map; /* set when primary link map is initialized */ 769 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 770 char pad[2]; 771 uberflags_t uberflags; 772 queue_head_t *queue_head; 773 thr_hash_table_t *thr_hash_table; 774 uint_t hash_size; /* # of entries in thr_hash_table[] */ 775 uint_t hash_mask; /* hash_size - 1 */ 776 ulwp_t *ulwp_one; /* main thread */ 777 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 778 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 779 int nthreads; /* total number of live threads/lwps */ 780 int nzombies; /* total number of zombie threads */ 781 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 782 pid_t pid; /* the current process's pid */ 783 void (*sigacthandler)(int, siginfo_t *, void *); 784 ulwp_t *lwp_stacks; 785 ulwp_t *lwp_laststack; 786 int nfreestack; 787 int thread_stack_cache; 788 ulwp_t *ulwp_freelist; 789 ulwp_t *ulwp_lastfree; 790 ulwp_t *ulwp_replace_free; 791 ulwp_t *ulwp_replace_last; 792 atfork_t *atforklist; /* circular Q for fork handlers */ 793 struct uberdata **tdb_bootstrap; 794 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 795 } uberdata_t; 796 797 #define link_lock _link_lock.pad_lock 798 #define fork_lock _fork_lock.pad_lock 799 #define fork_cond _fork_lock.pad_cond 800 #define fork_owner _fork_lock.pad_owner 801 #define fork_count _fork_lock.pad_count 802 #define tdb_hash_lock _tdb_hash_lock.pad_lock 803 804 #pragma align 64(__uberdata) 805 extern uberdata_t __uberdata; 806 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 807 extern int primary_link_map; 808 809 #define ulwp_mutex(ulwp, udp) \ 810 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 811 #define ulwp_condvar(ulwp, udp) \ 812 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 813 814 /* 815 * Grab and release the hash table lock for the specified lwp. 816 */ 817 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 818 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 819 820 #ifdef _SYSCALL32 /* needed by libc_db */ 821 822 typedef struct ulwp32 { 823 #if defined(__sparc) 824 uint32_t ul_dinstr; /* scratch space for dtrace */ 825 uint32_t ul_padsparc0[15]; 826 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 827 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 828 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 829 uint32_t ul_dreturn; /* dtrace: return %o0 */ 830 #endif 831 caddr32_t ul_self; /* pointer to self */ 832 #if defined(__x86) 833 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 834 #endif 835 caddr32_t ul_uberdata; /* uber (super-global) data */ 836 tls32_t ul_tls; /* dynamic thread-local storage base */ 837 caddr32_t ul_forw; /* forw, back all_lwps list, */ 838 caddr32_t ul_back; /* protected by link_lock */ 839 caddr32_t ul_next; /* list to keep track of stacks */ 840 caddr32_t ul_hash; /* hash chain linked list */ 841 caddr32_t ul_rval; /* return value from thr_exit() */ 842 caddr32_t ul_stk; /* mapping base of the stack */ 843 size32_t ul_mapsiz; /* mapping size of the stack */ 844 size32_t ul_guardsize; /* normally _lpagesize */ 845 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 846 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 847 stack32_t ul_ustack; /* current stack boundaries */ 848 int ul_ix; /* hash index */ 849 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 850 pri_t ul_pri; /* priority known to the library */ 851 pri_t ul_mappedpri; /* priority known to the application */ 852 char ul_policy; /* scheduling policy */ 853 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 854 union { 855 struct { 856 char cursig; /* deferred signal number */ 857 char pleasestop; /* lwp requested to stop itself */ 858 } s; 859 short curplease; /* for testing both at once */ 860 } ul_cp; 861 char ul_stop; /* reason for stopping */ 862 char ul_signalled; /* this lwp was cond_signal()d */ 863 char ul_dead; /* this lwp has called thr_exit */ 864 char ul_unwind; /* posix: unwind C++ stack */ 865 char ul_detached; /* THR_DETACHED at thread_create() */ 866 /* or pthread_detach() was called */ 867 char ul_writer; /* sleeping in rw_wrlock() */ 868 char ul_stopping; /* set by curthread: stopping self */ 869 char ul_cancel_prologue; /* for _cancel_prologue() */ 870 short ul_preempt; /* no_preempt()/preempt() */ 871 short ul_savpreempt; /* pre-existing preempt value */ 872 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 873 char ul_main; /* thread is the main thread */ 874 char ul_fork; /* thread is performing a fork */ 875 char ul_primarymap; /* primary link-map is initialized */ 876 /* per-thread copies of the corresponding global variables */ 877 uchar_t ul_max_spinners; /* thread_max_spinners */ 878 char ul_door_noreserve; /* thread_door_noreserve */ 879 char ul_queue_fifo; /* thread_queue_fifo */ 880 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 881 char ul_error_detection; /* thread_error_detection */ 882 char ul_async_safe; /* thread_async_safe */ 883 char ul_pad1[2]; 884 int ul_adaptive_spin; /* thread_adaptive_spin */ 885 int ul_release_spin; /* thread_release_spin */ 886 int ul_queue_spin; /* thread_queue_spin */ 887 int ul_critical; /* non-zero == in a critical region */ 888 int ul_sigdefer; /* non-zero == defer signals */ 889 int ul_vfork; /* thread is the child of vfork() */ 890 int ul_cancelable; /* _cancelon()/_canceloff() */ 891 char ul_cancel_pending; /* pthread_cancel() was called */ 892 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 893 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 894 char ul_save_async; /* saved copy of ul_cancel_async */ 895 char ul_mutator; /* lwp is a mutator (java interface) */ 896 char ul_created; /* created suspended */ 897 char ul_replace; /* replacement; must be free()d */ 898 uchar_t ul_nocancel; /* cancellation can't happen */ 899 int ul_errno; /* per-thread errno */ 900 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 901 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 902 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 903 caddr32_t ul_schedctl; /* schedctl data */ 904 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 905 int ul_gs; /* x86 only: value of %gs/%fs */ 906 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 907 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 908 td_evbuf32_t ul_td_evbuf; /* event buffer */ 909 char ul_td_events_enable; /* event mechanism enabled */ 910 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 911 char ul_qtype; /* MX or CV */ 912 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 913 int ul_usropts; /* flags given to thr_create() */ 914 caddr32_t ul_startpc; /* start func (thr_create()) */ 915 caddr32_t ul_startarg; /* argument for start function */ 916 caddr32_t ul_wchan; /* synch object when sleeping */ 917 caddr32_t ul_link; /* sleep queue link */ 918 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 919 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 920 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 921 pri_t ul_epri; /* effective scheduling priority */ 922 pri_t ul_emappedpri; /* effective mapped priority */ 923 uint_t ul_rdlocks; /* # of entries in ul_readlock array */ 924 /* 0 means there is but a single lock */ 925 union { /* single rwlock or pointer to array */ 926 readlock32_t single; 927 caddr32_t array; 928 } ul_readlock; 929 /* PROBE_SUPPORT begin */ 930 caddr32_t ul_tpdp; 931 /* PROBE_SUPPORT end */ 932 caddr32_t ul_siglink; /* pointer to previous context */ 933 uint_t ul_spin_lock_spin; /* spin lock statistics */ 934 uint_t ul_spin_lock_spin2; 935 uint_t ul_spin_lock_sleep; 936 uint_t ul_spin_lock_wakeup; 937 /* the following members *must* be last in the structure */ 938 /* they are discarded when ulwp is replaced on thr_exit() */ 939 sigset32_t ul_sigmask; /* thread's current signal mask */ 940 sigset32_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 941 siginfo32_t ul_siginfo; /* deferred siginfo */ 942 mutex_t ul_spinlock; /* used when suspending/continuing */ 943 fpuenv32_t ul_fpuenv; /* floating point state */ 944 caddr32_t ul_sp; /* stack pointer when blocked */ 945 #if defined(sparc) 946 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 947 #endif 948 } ulwp32_t; 949 950 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 951 952 typedef struct uberdata32 { 953 pad_lock_t _link_lock; 954 pad_lock_t _fork_lock; 955 pad_lock_t _tdb_hash_lock; 956 tdb_sync_stats_t tdb_hash_lock_stats; 957 siguaction32_t siguaction[NSIG]; 958 bucket32_t bucket[NBUCKETS]; 959 atexit_root32_t atexit_root; 960 tsd_metadata32_t tsd_metadata; 961 tls_metadata32_t tls_metadata; 962 char primary_map; 963 char bucket_init; 964 char pad[2]; 965 uberflags_t uberflags; 966 caddr32_t queue_head; 967 caddr32_t thr_hash_table; 968 uint_t hash_size; 969 uint_t hash_mask; 970 caddr32_t ulwp_one; 971 caddr32_t all_lwps; 972 caddr32_t all_zombies; 973 int nthreads; 974 int nzombies; 975 int ndaemons; 976 int pid; 977 caddr32_t sigacthandler; 978 caddr32_t lwp_stacks; 979 caddr32_t lwp_laststack; 980 int nfreestack; 981 int thread_stack_cache; 982 caddr32_t ulwp_freelist; 983 caddr32_t ulwp_lastfree; 984 caddr32_t ulwp_replace_free; 985 caddr32_t ulwp_replace_last; 986 caddr32_t atforklist; 987 caddr32_t tdb_bootstrap; 988 tdb32_t tdb; 989 } uberdata32_t; 990 991 #endif /* _SYSCALL32 */ 992 993 /* ul_stop values */ 994 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 995 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 996 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 997 998 /* 999 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1000 */ 1001 1002 typedef struct _cvattr { 1003 int pshared; 1004 clockid_t clockid; 1005 } cvattr_t; 1006 1007 typedef struct _mattr { 1008 int pshared; 1009 int protocol; 1010 int prioceiling; 1011 int type; 1012 int robustness; 1013 } mattr_t; 1014 1015 typedef struct _thrattr { 1016 size_t stksize; 1017 void *stkaddr; 1018 int detachstate; 1019 int daemonstate; 1020 int scope; 1021 int prio; 1022 int policy; 1023 int inherit; 1024 size_t guardsize; 1025 } thrattr_t; 1026 1027 typedef struct _rwlattr { 1028 int pshared; 1029 } rwlattr_t; 1030 1031 /* _curthread() is inline for speed */ 1032 extern ulwp_t *_curthread(void); 1033 #define curthread (_curthread()) 1034 1035 /* this version (also inline) can be tested for NULL */ 1036 extern ulwp_t *__curthread(void); 1037 1038 /* get the current stack pointer (also inline) */ 1039 extern greg_t stkptr(void); 1040 1041 /* 1042 * Suppress __attribute__((...)) if we are not compiling with gcc 1043 */ 1044 #if !defined(__GNUC__) 1045 #define __attribute__(string) 1046 #endif 1047 1048 /* 1049 * Implementation functions. Not visible outside of the library itself. 1050 */ 1051 extern int ___nanosleep(const timespec_t *, timespec_t *); 1052 extern void getgregs(ulwp_t *, gregset_t); 1053 extern void setgregs(ulwp_t *, gregset_t); 1054 extern void thr_panic(const char *); 1055 #pragma rarely_called(thr_panic) 1056 extern ulwp_t *find_lwp(thread_t); 1057 extern int real_priority(ulwp_t *); 1058 extern void finish_init(void); 1059 extern void queue_alloc(void); 1060 extern void tsd_exit(void); 1061 extern void tsd_free(ulwp_t *); 1062 extern void tls_setup(void); 1063 extern void tls_exit(void); 1064 extern void tls_free(ulwp_t *); 1065 extern void rwl_free(ulwp_t *); 1066 extern void sigacthandler(int, siginfo_t *, void *); 1067 extern void signal_init(void); 1068 extern int sigequalset(const sigset_t *, const sigset_t *); 1069 extern void mutex_setup(void); 1070 extern void take_deferred_signal(int); 1071 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1072 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1073 extern volatile sc_shared_t *setup_schedctl(void); 1074 extern void *lmalloc(size_t); 1075 extern void lfree(void *, size_t); 1076 extern void *libc_malloc(size_t); 1077 extern void *libc_realloc(void *, size_t); 1078 extern void libc_free(void *); 1079 extern char *libc_strdup(const char *); 1080 extern void ultos(uint64_t, int, char *); 1081 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1082 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1083 extern void thread_error(const char *); 1084 extern void grab_assert_lock(void); 1085 extern void dump_queue_statistics(void); 1086 extern void collect_queue_statistics(void); 1087 extern void record_spin_locks(ulwp_t *); 1088 #if defined(__sparc) 1089 extern void _flush_windows(void); 1090 #else 1091 #define _flush_windows() 1092 #endif 1093 extern void set_curthread(void *); 1094 1095 #if defined(THREAD_DEBUG) 1096 1097 extern void __assfail(const char *, const char *, int); 1098 #pragma rarely_called(__assfail) 1099 #define ASSERT(EX) (void)((EX) || (__assfail(#EX, __FILE__, __LINE__), 0)) 1100 1101 #else /* THREAD_DEBUG */ 1102 1103 #define ASSERT(EX) ((void)0) 1104 1105 #endif /* THREAD_DEBUG */ 1106 1107 /* enter a critical section */ 1108 #define enter_critical(self) (self->ul_critical++) 1109 1110 /* exit a critical section, take deferred actions if necessary */ 1111 extern void do_exit_critical(void); 1112 #define exit_critical(self) \ 1113 (void) (self->ul_critical--, \ 1114 ((self->ul_curplease && self->ul_critical == 0)? \ 1115 (do_exit_critical(), 0) : 0)) 1116 1117 /* 1118 * Like enter_critical()/exit_critical() but just for deferring signals. 1119 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1120 * calling application functions like constructors and destructors. 1121 * Care must be taken if the application function attempts to set 1122 * the signal mask while a deferred signal is present; the setting 1123 * of the signal mask must also be deferred. 1124 */ 1125 #define sigoff(self) (self->ul_sigdefer++) 1126 extern void sigon(ulwp_t *); 1127 1128 /* these are exported functions */ 1129 extern void _sigoff(void); 1130 extern void _sigon(void); 1131 1132 #define sigorset(s1, s2) \ 1133 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1134 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1135 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1136 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1137 1138 #define sigandset(s1, s2) \ 1139 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1140 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1141 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1142 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1143 1144 #define sigdiffset(s1, s2) \ 1145 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1146 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1147 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1148 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1149 1150 #define delete_reserved_signals(s) \ 1151 (((s)->__sigbits[0] &= MASKSET0), \ 1152 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1153 ((s)->__sigbits[2] = 0), \ 1154 ((s)->__sigbits[3] = 0)) 1155 1156 extern void block_all_signals(ulwp_t *self); 1157 1158 /* 1159 * When restoring the signal mask after having previously called 1160 * block_all_signals(), if we have a deferred signal present then 1161 * do nothing other than ASSERT() that we are in a critical region. 1162 * The signal mask will be set when we emerge from the critical region 1163 * and call take_deferred_signal(). There is no race condition here 1164 * because the kernel currently has all signals blocked for this thread. 1165 */ 1166 #define restore_signals(self) \ 1167 ((void) ((self)->ul_cursig? \ 1168 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1169 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask, NULL))) 1170 1171 extern void set_parking_flag(ulwp_t *, int); 1172 1173 extern void *_thr_setup(ulwp_t *); 1174 extern void _fpinherit(ulwp_t *); 1175 extern void _lwp_start(void); 1176 extern void _lwp_terminate(void); 1177 extern void lmutex_unlock(mutex_t *); 1178 extern void lmutex_lock(mutex_t *); 1179 extern void _prefork_handler(void); 1180 extern void _postfork_parent_handler(void); 1181 extern void _postfork_child_handler(void); 1182 extern void _postfork1_child(void); 1183 extern int fork_lock_enter(const char *); 1184 extern void fork_lock_exit(void); 1185 extern void suspend_fork(void); 1186 extern void continue_fork(int); 1187 extern void do_sigcancel(void); 1188 extern void init_sigcancel(void); 1189 extern void _cancelon(void); 1190 extern void _canceloff(void); 1191 extern void _canceloff_nocancel(void); 1192 extern void no_preempt(ulwp_t *); 1193 extern void preempt(ulwp_t *); 1194 extern void _thrp_unwind(void *); 1195 1196 /* 1197 * Prototypes for the strong versions of the interface functions 1198 */ 1199 extern pid_t _fork(void); 1200 extern pid_t _fork1(void); 1201 extern pid_t __fork1(void); 1202 extern pid_t _forkall(void); 1203 extern pid_t __forkall(void); 1204 extern pid_t _private_getpid(void); 1205 extern uid_t _private_geteuid(void); 1206 extern int _kill(pid_t, int); 1207 extern int _open(const char *, int, ...); 1208 extern int _close(int); 1209 extern ssize_t _read(int, void *, size_t); 1210 extern ssize_t _write(int, const void *, size_t); 1211 extern void *_memcpy(void *, const void *, size_t); 1212 extern void *_memset(void *, int, size_t); 1213 extern int _memcmp(const void *, const void *, size_t); 1214 extern void *_private_memcpy(void *, const void *, size_t); 1215 extern void *_private_memset(void *, int, size_t); 1216 extern int _private_sigfillset(sigset_t *); 1217 extern int _private_sigemptyset(sigset_t *); 1218 extern int _private_sigaddset(sigset_t *, int); 1219 extern int _private_sigdelset(sigset_t *, int); 1220 extern int _private_sigismember(sigset_t *, int); 1221 extern void *_private_mmap(void *, size_t, int, int, int, off_t); 1222 extern int _private_mprotect(void *, size_t, int); 1223 extern int _private_munmap(void *, size_t); 1224 extern int _private_getrlimit(int, struct rlimit *); 1225 extern int __lwp_continue(lwpid_t); 1226 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1227 extern int __lwp_kill(lwpid_t, int); 1228 extern lwpid_t __lwp_self(void); 1229 extern int ___lwp_suspend(lwpid_t); 1230 extern void lwp_yield(void); 1231 extern int lwp_wait(lwpid_t, lwpid_t *); 1232 extern int __lwp_wait(lwpid_t, lwpid_t *); 1233 extern int __lwp_detach(lwpid_t); 1234 extern sc_shared_t *__schedctl(void); 1235 1236 extern int _private_setcontext(const ucontext_t *); 1237 extern int _private_getcontext(ucontext_t *); 1238 #pragma unknown_control_flow(_private_getcontext) 1239 /* actual system call traps */ 1240 extern int __setcontext_syscall(const ucontext_t *); 1241 extern int __getcontext_syscall(ucontext_t *); 1242 extern int _private_setustack(stack_t *); 1243 extern int __clock_gettime(clockid_t, timespec_t *); 1244 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1245 extern void hrt2ts(hrtime_t, timespec_t *); 1246 1247 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1248 extern int __lwp_sigmask(int, const sigset_t *, sigset_t *); 1249 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1250 extern caddr_t __sighndlrend; 1251 #pragma unknown_control_flow(__sighndlr) 1252 1253 extern void _pthread_exit(void *); 1254 1255 /* these are private to the library */ 1256 extern int _private_mutex_init(mutex_t *, int, void *); 1257 extern int _private_mutex_destroy(mutex_t *); 1258 extern int _private_mutex_lock(mutex_t *); 1259 extern int _private_mutex_trylock(mutex_t *); 1260 extern int _private_mutex_unlock(mutex_t *); 1261 1262 extern int _mutex_init(mutex_t *, int, void *); 1263 extern int _mutex_destroy(mutex_t *); 1264 extern int _mutex_lock(mutex_t *); 1265 extern int _mutex_trylock(mutex_t *); 1266 extern int _mutex_unlock(mutex_t *); 1267 extern void _mutex_set_typeattr(mutex_t *, int); 1268 extern int __mutex_init(mutex_t *, int, void *); 1269 extern int __mutex_destroy(mutex_t *); 1270 extern int __mutex_lock(mutex_t *); 1271 extern int __mutex_trylock(mutex_t *); 1272 extern int __mutex_unlock(mutex_t *); 1273 extern int mutex_is_held(mutex_t *); 1274 extern int mutex_lock_internal(mutex_t *, timespec_t *, int); 1275 extern int mutex_trylock_adaptive(mutex_t *); 1276 extern int mutex_queuelock_adaptive(mutex_t *); 1277 extern int mutex_lock_impl(mutex_t *mp, timespec_t *tsp); 1278 1279 extern int _cond_init(cond_t *, int, void *); 1280 extern int _cond_wait(cond_t *, mutex_t *); 1281 extern int _cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1282 extern int _cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1283 extern int _cond_signal(cond_t *); 1284 extern int _cond_broadcast(cond_t *); 1285 extern int _cond_destroy(cond_t *); 1286 extern int cond_sleep_queue(cond_t *, mutex_t *, timespec_t *); 1287 extern int cond_sleep_kernel(cond_t *, mutex_t *, timespec_t *); 1288 extern int cond_signal_internal(cond_t *); 1289 extern int cond_broadcast_internal(cond_t *); 1290 1291 extern int __rwlock_init(rwlock_t *, int, void *); 1292 extern int rw_read_is_held(rwlock_t *); 1293 extern int rw_write_is_held(rwlock_t *); 1294 1295 extern int _thr_continue(thread_t); 1296 extern int _thrp_create(void *, size_t, void *(*func)(void *), void *, 1297 long, thread_t *, pri_t, int, size_t); 1298 extern int _thr_getprio(thread_t, int *); 1299 extern int _thr_getspecific(thread_key_t, void **); 1300 extern int _thr_join(thread_t, thread_t *, void **); 1301 extern int _thr_keycreate(thread_key_t *, PFrV); 1302 extern int _thr_key_delete(thread_key_t); 1303 extern int _thr_main(void); 1304 extern thread_t _thr_self(void); 1305 extern int _thr_getconcurrency(void); 1306 extern int _thr_setconcurrency(int); 1307 extern int _thr_setprio(thread_t, int); 1308 extern int _thr_setspecific(thread_key_t, void *); 1309 extern int _thr_stksegment(stack_t *); 1310 extern int _thrp_suspend(thread_t, uchar_t); 1311 extern int _thrp_continue(thread_t, uchar_t); 1312 extern int _thr_sigsetmask(int, const sigset_t *, sigset_t *); 1313 1314 extern void _thr_terminate(void *); 1315 extern void _thr_exit(void *); 1316 extern void _thrp_exit(void); 1317 1318 extern const thrattr_t *def_thrattr(void); 1319 extern int _thread_setschedparam_main(pthread_t, int, 1320 const struct sched_param *, int); 1321 extern int _validate_rt_prio(int, int); 1322 extern int _thrp_setlwpprio(lwpid_t, int, int); 1323 extern pri_t _map_rtpri_to_gp(pri_t); 1324 1325 /* 1326 * System call wrappers (direct interfaces to the kernel) 1327 */ 1328 extern int ___lwp_mutex_init(mutex_t *, int); 1329 extern int ___lwp_mutex_trylock(mutex_t *); 1330 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *); 1331 extern int ___lwp_mutex_unlock(mutex_t *); 1332 extern int ___lwp_mutex_wakeup(mutex_t *); 1333 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1334 extern int __lwp_cond_signal(lwp_cond_t *); 1335 extern int __lwp_cond_broadcast(lwp_cond_t *); 1336 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1337 extern int __lwp_sema_trywait(lwp_sema_t *); 1338 extern int __lwp_sema_post(lwp_sema_t *); 1339 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1340 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1341 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1342 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1343 extern int __lwp_rwlock_unlock(rwlock_t *); 1344 extern int __lwp_park(timespec_t *, lwpid_t); 1345 extern int __lwp_unpark(lwpid_t); 1346 extern int __lwp_unpark_all(lwpid_t *, int); 1347 #if defined(__x86) 1348 extern int ___lwp_private(int, int, void *); 1349 #endif /* __x86 */ 1350 1351 extern int _private_lwp_mutex_lock(mutex_t *); 1352 extern int _private_lwp_mutex_unlock(mutex_t *); 1353 1354 /* 1355 * inlines 1356 */ 1357 extern int set_lock_byte(volatile uint8_t *); 1358 extern uint32_t swap32(volatile uint32_t *, uint32_t); 1359 extern uint32_t cas32(volatile uint32_t *, uint32_t, uint32_t); 1360 extern void incr32(volatile uint32_t *); 1361 extern void decr32(volatile uint32_t *); 1362 #if defined(__sparc) 1363 extern ulong_t caller(void); 1364 extern ulong_t getfp(void); 1365 #endif /* __sparc */ 1366 1367 #include "thr_inlines.h" 1368 1369 #endif /* _THR_UBERDATA_H */ 1370