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 2008 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 <setjmp.h> 57 #include "libc_int.h" 58 #include "tdb_agent.h" 59 #include "thr_debug.h" 60 61 /* 62 * This is an implementation-specific include file for threading support. 63 * It is not to be seen by the clients of the library. 64 * 65 * This file also describes uberdata in libc. 66 * 67 * The term "uberdata" refers to data that is unique and visible across 68 * all link maps. The name is meant to imply that such data is truly 69 * global, not just locally global to a particular link map. 70 * 71 * See the Linker and Libraries Guide for a full description of alternate 72 * link maps and how they are set up and used. 73 * 74 * Alternate link maps implement multiple global namespaces within a single 75 * process. There may be multiple instances of identical dynamic libraries 76 * loaded in a process's address space at the same time, each on a different 77 * link map (as determined by the dynamic linker), each with its own set of 78 * global variables. Which particular instance of a global variable is seen 79 * by a thread running in the process is determined by the link map on which 80 * the thread happens to be executing at the time. 81 * 82 * However, there are aspects of a process that are unique across all 83 * link maps, in particular the structures used to implement threads 84 * of control (in Sparc terminology, there is only one %g7 regardless 85 * of the link map on which the thread is executing). 86 * 87 * All uberdata is referenced from a base pointer in the thread's ulwp_t 88 * structure (which is also uberdata). All allocations and deallocations 89 * of uberdata are made via the uberdata-aware lmalloc() and lfree() 90 * interfaces (malloc() and free() are simply locally-global). 91 */ 92 93 /* 94 * Special libc-private access to errno. 95 * We do this so that references to errno do not invoke the dynamic linker. 96 */ 97 #undef errno 98 #define errno (*curthread->ul_errnop) 99 100 /* 101 * See <sys/synch32.h> for the reasons for these values 102 * and why they are different for sparc and intel. 103 */ 104 #if defined(__sparc) 105 106 /* lock.lock64.pad[x] 4 5 6 7 */ 107 #define LOCKMASK 0xff000000 108 #define WAITERMASK 0x000000ff 109 #define SPINNERMASK 0x00ff0000 110 #define SPINNERSHIFT 16 111 #define WAITER 0x00000001 112 #define LOCKSET 0xff 113 #define LOCKCLEAR 0 114 115 #define PIDSHIFT 32 116 #define LOCKMASK64 0xffffffffff000000ULL 117 #define LOCKBYTE64 0x00000000ff000000ULL 118 #define WAITERMASK64 0x00000000000000ffULL 119 #define SPINNERMASK64 0x0000000000ff0000ULL 120 121 #elif defined(__x86) 122 123 /* lock.lock64.pad[x] 7 6 5 4 */ 124 #define LOCKMASK 0xff000000 125 #define WAITERMASK 0x00ff0000 126 #define SPINNERMASK 0x0000ff00 127 #define SPINNERSHIFT 8 128 #define WAITER 0x00010000 129 #define LOCKSET 0x01 130 #define LOCKCLEAR 0 131 132 #define PIDSHIFT 0 133 #define LOCKMASK64 0xff000000ffffffffULL 134 #define LOCKBYTE64 0x0100000000000000ULL 135 #define WAITERMASK64 0x00ff000000000000ULL 136 #define SPINNERMASK64 0x0000ff0000000000ULL 137 138 #else 139 #error "neither __sparc nor __x86 is defined" 140 #endif 141 142 /* 143 * Fetch the owner of a USYNC_THREAD mutex. 144 * Don't use this with process-shared mutexes; 145 * the owing thread may be in a different process. 146 */ 147 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 148 149 /* 150 * Test if a thread owns a process-private (USYNC_THREAD) mutex. 151 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex. 152 * The 'mp' argument must not have side-effects since it is evaluated twice. 153 */ 154 #define MUTEX_OWNED(mp, thrp) \ 155 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 156 157 158 /* 159 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 160 * collection of lock statistics by a debugger or other collecting tool. 161 * 162 * uberflags.uf_thread_error_detection is set by an environment variable: 163 * _THREAD_ERROR_DETECTION 164 * 0 == no detection of locking primitive errors. 165 * 1 == detect errors and issue a warning message. 166 * 2 == detect errors, issue a warning message, and dump core. 167 * 168 * We bundle these together in uberflags.uf_trs_ted to make a test of either 169 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 170 * 171 * uberflags.uf_mt is set non-zero when the first thread (in addition 172 * to the main thread) is created. 173 * 174 * We bundle all these flags together in uberflags.uf_all to make a test 175 * of any being non-zero a single memory reference (again, for speed). 176 */ 177 typedef union { 178 int uf_all; /* combined all flags */ 179 struct { 180 short h_pad; 181 short h_trs_ted; /* combined reg sync & error detect */ 182 } uf_h; 183 struct { 184 char x_mt; 185 char x_pad; 186 char x_tdb_register_sync; 187 char x_thread_error_detection; 188 } uf_x; 189 } uberflags_t; 190 191 #define uf_mt uf_x.x_mt 192 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 193 #define uf_thread_error_detection uf_x.x_thread_error_detection 194 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 195 196 /* 197 * NOTE WELL: 198 * To enable further optimization, the "ul_schedctl_called" member 199 * of the ulwp_t structure (below) serves double-duty: 200 * 1. If NULL, it means that the thread must call __schedctl() 201 * to set up its schedctl mappings before acquiring a mutex. 202 * This is required by the implementation of adaptive mutex locking. 203 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 204 * uberflags can be made without additional memory references. 205 * This allows the common case of _mutex_lock() and _mutex_unlock() for 206 * USYNC_THREAD mutexes with no error detection and no lock statistics 207 * to be optimized for speed. 208 */ 209 210 211 /* double the default stack size for 64-bit processes */ 212 #ifdef _LP64 213 #define MINSTACK (8 * 1024) 214 #define DEFAULTSTACK (2 * 1024 * 1024) 215 #else 216 #define MINSTACK (4 * 1024) 217 #define DEFAULTSTACK (1024 * 1024) 218 #endif 219 #define TSD_NKEYS _POSIX_THREAD_KEYS_MAX 220 221 #define THREAD_MIN_PRIORITY 0 222 #define THREAD_MAX_PRIORITY 127 223 224 #define PRIO_SET 0 /* set priority and policy */ 225 #define PRIO_SET_PRIO 1 /* set priority only */ 226 #define PRIO_INHERIT 2 227 #define PRIO_DISINHERIT 3 228 229 #define MUTEX_TRY 0 230 #define MUTEX_LOCK 1 231 232 #if defined(__x86) 233 234 typedef struct { /* structure returned by fnstenv */ 235 int fctrl; /* control word */ 236 int fstat; /* status word (flags, etc) */ 237 int ftag; /* tag of which regs busy */ 238 int misc[4]; /* other stuff, 28 bytes total */ 239 } fpuenv_t; 240 241 #ifdef _SYSCALL32 242 typedef fpuenv_t fpuenv32_t; 243 #endif /* _SYSCALL32 */ 244 245 #elif defined(__sparc) 246 247 typedef struct { /* fp state structure */ 248 greg_t fsr; 249 greg_t fpu_en; 250 } fpuenv_t; 251 252 #ifdef _SYSCALL32 253 typedef struct { 254 greg32_t fsr; 255 greg32_t fpu_en; 256 } fpuenv32_t; 257 #endif /* _SYSCALL32 */ 258 259 #endif /* __x86 */ 260 261 #if defined(__x86) 262 extern void ht_pause(void); /* "pause" instruction */ 263 #define SMT_PAUSE() ht_pause() 264 #else 265 #define SMT_PAUSE() 266 #endif /* __x86 */ 267 268 /* 269 * Cleanup handler related data. 270 * This structure is exported as _cleanup_t in pthread.h. 271 * pthread.h exports only the size of this structure, so check 272 * _cleanup_t in pthread.h before making any change here. 273 */ 274 typedef struct __cleanup { 275 struct __cleanup *next; /* pointer to next handler */ 276 caddr_t fp; /* current frame pointer */ 277 void (*func)(void *); /* cleanup handler address */ 278 void *arg; /* handler's argument */ 279 } __cleanup_t; 280 281 /* 282 * Thread-Specific Data (TSD) 283 * TSD_NFAST includes the invalid key zero, so there 284 * are really only (TSD_NFAST - 1) fast key slots. 285 */ 286 typedef void (*PFrV)(void *); 287 #define TSD_UNALLOCATED ((PFrV)1) 288 #define TSD_NFAST 9 289 290 /* 291 * The tsd union is designed to burn a little memory (9 words) to make 292 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 293 * end of the pad region to increase the likelihood that it falls on the 294 * same cache line as the data. 295 */ 296 typedef union tsd { 297 uint_t tsd_nalloc; /* Amount of allocated storage */ 298 void *tsd_pad[TSD_NFAST]; 299 void *tsd_data[1]; 300 } tsd_t; 301 302 typedef struct { 303 mutex_t tsdm_lock; /* Lock protecting the data */ 304 uint_t tsdm_nkeys; /* Number of allocated keys */ 305 uint_t tsdm_nused; /* Number of used keys */ 306 PFrV *tsdm_destro; /* Per-key destructors */ 307 char tsdm_pad[64 - /* pad to 64 bytes */ 308 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 309 } tsd_metadata_t; 310 311 #ifdef _SYSCALL32 312 typedef union tsd32 { 313 uint_t tsd_nalloc; /* Amount of allocated storage */ 314 caddr32_t tsd_pad[TSD_NFAST]; 315 caddr32_t tsd_data[1]; 316 } tsd32_t; 317 318 typedef struct { 319 mutex_t tsdm_lock; /* Lock protecting the data */ 320 uint_t tsdm_nkeys; /* Number of allocated keys */ 321 uint_t tsdm_nused; /* Number of used keys */ 322 caddr32_t tsdm_destro; /* Per-key destructors */ 323 char tsdm_pad[64 - /* pad to 64 bytes */ 324 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 325 } tsd_metadata32_t; 326 #endif /* _SYSCALL32 */ 327 328 329 /* 330 * Thread-Local Storage (TLS) 331 */ 332 typedef struct { 333 void *tls_data; 334 size_t tls_size; 335 } tls_t; 336 337 typedef struct { 338 mutex_t tls_lock; /* Lock protecting the data */ 339 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 340 tls_t static_tls; /* Template for static TLS */ 341 char tls_pad[64 - /* pad to 64 bytes */ 342 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 343 } tls_metadata_t; 344 345 #ifdef _SYSCALL32 346 typedef struct { 347 caddr32_t tls_data; 348 size32_t tls_size; 349 } tls32_t; 350 351 typedef struct { 352 mutex_t tls_lock; /* Lock protecting the data */ 353 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 354 tls32_t static_tls; /* Template for static TLS */ 355 char tls_pad[64 - /* pad to 64 bytes */ 356 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 357 } tls_metadata32_t; 358 #endif /* _SYSCALL32 */ 359 360 361 /* 362 * Sleep queues for USYNC_THREAD condvars and mutexes. 363 * The size and alignment is 64 bytes to reduce cache conflicts. 364 */ 365 typedef union { 366 uint64_t qh_64[8]; 367 struct { 368 mutex_t q_lock; 369 uint8_t q_qcnt; 370 uint8_t q_pad[7]; 371 uint64_t q_lockcount; 372 uint32_t q_qlen; 373 uint32_t q_qmax; 374 struct ulwp *q_head; 375 struct ulwp *q_tail; 376 } qh_qh; 377 } queue_head_t; 378 379 #define qh_lock qh_qh.q_lock 380 #define qh_qcnt qh_qh.q_qcnt 381 #define qh_lockcount qh_qh.q_lockcount 382 #define qh_qlen qh_qh.q_qlen 383 #define qh_qmax qh_qh.q_qmax 384 #define qh_head qh_qh.q_head 385 #define qh_tail qh_qh.q_tail 386 387 /* queue types passed to queue_lock() and enqueue() */ 388 #define MX 0 389 #define CV 1 390 #define FIFOQ 0x10 /* or'ing with FIFOQ asks for FIFO queueing */ 391 #define QHASHSHIFT 9 /* number of hashing bits */ 392 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */ 393 #define QUEUE_HASH(wchan, type) ((uint_t) \ 394 ((((uintptr_t)(wchan) >> 3) \ 395 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \ 396 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 397 398 extern queue_head_t *queue_lock(void *, int); 399 extern void queue_unlock(queue_head_t *); 400 extern void enqueue(queue_head_t *, struct ulwp *, void *, int); 401 extern struct ulwp *dequeue(queue_head_t *, void *, int *); 402 extern struct ulwp *queue_waiter(queue_head_t *, void *); 403 extern struct ulwp *queue_unlink(queue_head_t *, 404 struct ulwp **, struct ulwp *); 405 extern uint8_t dequeue_self(queue_head_t *, void *); 406 extern void unsleep_self(void); 407 extern void spin_lock_set(mutex_t *); 408 extern void spin_lock_clear(mutex_t *); 409 410 /* 411 * Memory block for chain of owned ceiling mutexes. 412 */ 413 typedef struct mxchain { 414 struct mxchain *mxchain_next; 415 mutex_t *mxchain_mx; 416 } mxchain_t; 417 418 /* 419 * Pointer to an rwlock that is held for reading. 420 * Used in rw_rdlock() to allow a thread that already holds a read 421 * lock to acquire another read lock on the same rwlock even if 422 * there are writers waiting. This to avoid deadlock when acquiring 423 * a read lock more than once in the presence of pending writers. 424 * POSIX mandates this behavior. 425 */ 426 typedef struct { 427 void *rd_rwlock; /* the rwlock held for reading */ 428 size_t rd_count; /* count of read locks applied */ 429 } readlock_t; 430 431 #ifdef _SYSCALL32 432 typedef struct { 433 caddr32_t rd_rwlock; 434 size32_t rd_count; 435 } readlock32_t; 436 #endif /* _SYSCALL32 */ 437 438 /* 439 * Maximum number of read locks allowed for one thread on one rwlock. 440 * This could be as large as INT_MAX, but the SUSV3 test suite would 441 * take an inordinately long time to complete. This is big enough. 442 */ 443 #define READ_LOCK_MAX 100000 444 445 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 446 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 447 448 /* 449 * Round up an integral value to a multiple of 64 450 */ 451 #define roundup64(x) (-(-(x) & -64)) 452 453 /* 454 * NOTE: Whatever changes are made to ulwp_t must be 455 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 456 * 457 * NOTE: ul_self *must* be the first member of ulwp_t on x86 458 * Low-level x86 code relies on this. 459 */ 460 typedef struct ulwp { 461 /* 462 * These members always need to come first on sparc. 463 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 464 */ 465 #if defined(__sparc) 466 uint32_t ul_dinstr; /* scratch space for dtrace */ 467 uint32_t ul_padsparc0[15]; 468 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 469 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 470 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 471 uint32_t ul_dreturn; /* dtrace: return %o0 */ 472 #endif 473 struct ulwp *ul_self; /* pointer to self */ 474 #if defined(__i386) 475 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 476 #elif defined(__amd64) 477 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 478 #endif 479 struct uberdata *ul_uberdata; /* uber (super-global) data */ 480 tls_t ul_tls; /* dynamic thread-local storage base */ 481 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 482 struct ulwp *ul_back; /* protected by link_lock */ 483 struct ulwp *ul_next; /* list to keep track of stacks */ 484 struct ulwp *ul_hash; /* hash chain linked list */ 485 void *ul_rval; /* return value from thr_exit() */ 486 caddr_t ul_stk; /* mapping base of the stack */ 487 size_t ul_mapsiz; /* mapping size of the stack */ 488 size_t ul_guardsize; /* normally _lpagesize */ 489 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 490 size_t ul_stksiz; /* broken thr_stksegment() interface */ 491 stack_t ul_ustack; /* current stack boundaries */ 492 int ul_ix; /* hash index */ 493 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 494 pri_t ul_pri; /* priority known to the library */ 495 pri_t ul_mappedpri; /* priority known to the application */ 496 char ul_policy; /* scheduling policy */ 497 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 498 union { 499 struct { 500 char cursig; /* deferred signal number */ 501 char pleasestop; /* lwp requested to stop itself */ 502 } s; 503 short curplease; /* for testing both at once */ 504 } ul_cp; 505 char ul_stop; /* reason for stopping */ 506 char ul_signalled; /* this lwp was cond_signal()d */ 507 char ul_dead; /* this lwp has called thr_exit */ 508 char ul_unwind; /* posix: unwind C++ stack */ 509 char ul_detached; /* THR_DETACHED at thread_create() */ 510 /* or pthread_detach() was called */ 511 char ul_writer; /* sleeping in rw_wrlock() */ 512 char ul_stopping; /* set by curthread: stopping self */ 513 char ul_cancel_prologue; /* for _cancel_prologue() */ 514 short ul_preempt; /* no_preempt()/preempt() */ 515 short ul_savpreempt; /* pre-existing preempt value */ 516 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 517 char ul_main; /* thread is the main thread */ 518 char ul_fork; /* thread is performing a fork */ 519 char ul_primarymap; /* primary link-map is initialized */ 520 /* per-thread copies of the corresponding global variables */ 521 uint8_t ul_max_spinners; /* thread_max_spinners */ 522 char ul_door_noreserve; /* thread_door_noreserve */ 523 char ul_queue_fifo; /* thread_queue_fifo */ 524 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 525 char ul_error_detection; /* thread_error_detection */ 526 char ul_async_safe; /* thread_async_safe */ 527 char ul_pad1; 528 char ul_save_state; /* bind_guard() interface to ld.so.1 */ 529 int ul_adaptive_spin; /* thread_adaptive_spin */ 530 int ul_queue_spin; /* thread_queue_spin */ 531 volatile int ul_critical; /* non-zero == in a critical region */ 532 int ul_sigdefer; /* non-zero == defer signals */ 533 int ul_vfork; /* thread is the child of vfork() */ 534 int ul_cancelable; /* _cancelon()/_canceloff() */ 535 char ul_cancel_pending; /* pthread_cancel() was called */ 536 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 537 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 538 char ul_save_async; /* saved copy of ul_cancel_async */ 539 char ul_mutator; /* lwp is a mutator (java interface) */ 540 char ul_created; /* created suspended */ 541 char ul_replace; /* replacement; must be free()d */ 542 uchar_t ul_nocancel; /* cancellation can't happen */ 543 int ul_errno; /* per-thread errno */ 544 int *ul_errnop; /* pointer to errno or self->ul_errno */ 545 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 546 uberflags_t *volatile ul_schedctl_called; /* ul_schedctl is set up */ 547 volatile sc_shared_t *volatile ul_schedctl; /* schedctl data */ 548 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 549 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 550 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 551 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 552 td_evbuf_t ul_td_evbuf; /* event buffer */ 553 char ul_td_events_enable; /* event mechanism enabled */ 554 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 555 char ul_qtype; /* MX or CV */ 556 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 557 int ul_usropts; /* flags given to thr_create() */ 558 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 559 void *ul_startarg; /* argument for start function */ 560 void *ul_wchan; /* synch object when sleeping */ 561 struct ulwp *ul_link; /* sleep queue link */ 562 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 563 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 564 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 565 pri_t ul_epri; /* effective scheduling priority */ 566 pri_t ul_emappedpri; /* effective mapped priority */ 567 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 568 /* 0 means there is but a single entry */ 569 union { /* single entry or pointer to array */ 570 readlock_t single; 571 readlock_t *array; 572 } ul_readlock; 573 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 574 /* 0 means there is but a single entry */ 575 union { /* single entry or pointer to array */ 576 mutex_t *single; 577 mutex_t **array; 578 } ul_heldlocks; 579 /* PROBE_SUPPORT begin */ 580 void *ul_tpdp; 581 /* PROBE_SUPPORT end */ 582 ucontext_t *ul_siglink; /* pointer to previous context */ 583 uint_t ul_spin_lock_spin; /* spin lock statistics */ 584 uint_t ul_spin_lock_spin2; 585 uint_t ul_spin_lock_sleep; 586 uint_t ul_spin_lock_wakeup; 587 /* the following members *must* be last in the structure */ 588 /* they are discarded when ulwp is replaced on thr_exit() */ 589 sigset_t ul_sigmask; /* thread's current signal mask */ 590 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 591 siginfo_t ul_siginfo; /* deferred siginfo */ 592 mutex_t ul_spinlock; /* used when suspending/continuing */ 593 fpuenv_t ul_fpuenv; /* floating point state */ 594 uintptr_t ul_sp; /* stack pointer when blocked */ 595 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 596 #if defined(sparc) 597 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 598 #endif 599 } ulwp_t; 600 601 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 602 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 603 #define ul_curplease ul_cp.curplease /* for testing both at once */ 604 605 /* 606 * This is the size of a replacement ulwp, retained only for the benefit 607 * of thr_join(). The trailing members are unneeded for this purpose. 608 */ 609 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 610 611 /* 612 * Definitions for static initialization of signal sets, 613 * plus some sneaky optimizations in various places. 614 */ 615 616 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 617 618 #if (MAXSIG > 32 && MAXSIG <= 64) 619 #define FILLSET0 0xffffffffu 620 #define FILLSET1 ((1u << (MAXSIG - 32)) - 1) 621 #else 622 #error "fix me: MAXSIG out of bounds" 623 #endif 624 625 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 626 #define CANTMASK1 0 627 628 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 629 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 630 631 extern const sigset_t maskset; /* set of all maskable signals */ 632 633 extern int thread_adaptive_spin; 634 extern uint_t thread_max_spinners; 635 extern int thread_queue_spin; 636 extern int thread_queue_fifo; 637 extern int thread_queue_dump; 638 extern int thread_cond_wait_defer; 639 extern int thread_async_safe; 640 extern int thread_queue_verify; 641 642 /* 643 * pthread_atfork() related data, used to store atfork handlers. 644 */ 645 typedef struct atfork { 646 struct atfork *forw; /* forward pointer */ 647 struct atfork *back; /* backward pointer */ 648 void (*prepare)(void); /* pre-fork handler */ 649 void (*parent)(void); /* post-fork parent handler */ 650 void (*child)(void); /* post-fork child handler */ 651 } atfork_t; 652 653 /* 654 * Element in the table of registered process robust locks. 655 * We keep track of these to make sure that we only call 656 * ___lwp_mutex_register() once for each such lock. 657 */ 658 typedef struct robust { 659 struct robust *robust_next; 660 mutex_t *robust_lock; 661 } robust_t; 662 663 /* 664 * Parameters of the lock registration hash table. 665 */ 666 #define LOCKSHIFT 9 /* number of hashing bits */ 667 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<9 == 512) */ 668 #define LOCK_HASH(addr) (uint_t) \ 669 ((((uintptr_t)(addr) >> 3) \ 670 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 671 & (LOCKHASHSZ - 1)) 672 673 /* 674 * Make our hot locks reside on private cache lines (64 bytes). 675 */ 676 typedef struct { 677 mutex_t pad_lock; 678 char pad_pad[64 - sizeof (mutex_t)]; 679 } pad_lock_t; 680 681 /* 682 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 683 */ 684 typedef struct { 685 mutex_t pad_lock; 686 char pad_pad[32 - sizeof (mutex_t)]; 687 } pad32_lock_t; 688 689 /* 690 * The threads hash table is used for fast lookup and locking of an active 691 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 692 * thr_hash_table_t structures, where N == 1 before the main thread creates 693 * the first additional thread and N == 1024 afterwards. Each element of the 694 * table is 64 bytes in size and alignment to reduce cache conflicts. 695 */ 696 typedef struct { 697 mutex_t hash_lock; /* lock per bucket */ 698 cond_t hash_cond; /* convar per bucket */ 699 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 700 char hash_pad[64 - /* pad out to 64 bytes */ 701 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 702 } thr_hash_table_t; 703 704 #ifdef _SYSCALL32 705 typedef struct { 706 mutex_t hash_lock; 707 cond_t hash_cond; 708 caddr32_t hash_bucket; 709 char hash_pad[64 - 710 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 711 } thr_hash_table32_t; 712 #endif /* _SYSCALL32 */ 713 714 715 /* 716 * siguaction members have 128-byte size and 64-byte alignment. 717 * We know that sizeof (struct sigaction) is 32 bytes for both 718 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 719 */ 720 typedef struct { 721 rwlock_t sig_lock; 722 struct sigaction sig_uaction; 723 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 724 } siguaction_t; 725 726 #ifdef _SYSCALL32 727 typedef struct { 728 rwlock_t sig_lock; 729 struct sigaction32 sig_uaction; 730 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 731 } siguaction32_t; 732 #endif /* _SYSCALL32 */ 733 734 735 /* 736 * Bucket structures, used by lmalloc()/lfree(). 737 * See port/threads/alloc.c for details. 738 * A bucket's size and alignment is 64 bytes. 739 */ 740 typedef struct { 741 mutex_t bucket_lock; /* protects the free list allocations */ 742 void *free_list; /* LIFO list of blocks to allocate/free */ 743 size_t chunks; /* number of 64K blocks mmap()ed last time */ 744 char pad64[64 - /* pad out to 64 bytes */ 745 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 746 } bucket_t; 747 748 #ifdef _SYSCALL32 749 typedef struct { 750 mutex_t bucket_lock; 751 caddr32_t free_list; 752 size32_t chunks; 753 char pad64[64 - /* pad out to 64 bytes */ 754 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 755 } bucket32_t; 756 #endif /* _SYSCALL32 */ 757 758 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 759 760 761 /* 762 * atexit() data structures. 763 * See port/gen/atexit.c for details. 764 */ 765 typedef void (*_exithdlr_func_t) (void); 766 767 typedef struct _exthdlr { 768 struct _exthdlr *next; /* next in handler list */ 769 _exithdlr_func_t hdlr; /* handler itself */ 770 } _exthdlr_t; 771 772 typedef struct { 773 mutex_t exitfns_lock; 774 _exthdlr_t *head; 775 void *exit_frame_monitor; 776 char exit_pad[64 - /* pad out to 64 bytes */ 777 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 778 } atexit_root_t; 779 780 #ifdef _SYSCALL32 781 typedef struct { 782 mutex_t exitfns_lock; 783 caddr32_t head; 784 caddr32_t exit_frame_monitor; 785 char exit_pad[64 - /* pad out to 64 bytes */ 786 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 787 } atexit_root32_t; 788 #endif /* _SYSCALL32 */ 789 790 791 /* 792 * This is data that is global to all link maps (uberdata, aka super-global). 793 */ 794 typedef struct uberdata { 795 pad_lock_t _link_lock; 796 pad32_lock_t _fork_lock; 797 pad32_lock_t _atfork_lock; 798 pad32_lock_t _callout_lock; 799 pad32_lock_t _tdb_hash_lock; 800 tdb_sync_stats_t tdb_hash_lock_stats; 801 siguaction_t siguaction[NSIG]; 802 bucket_t bucket[NBUCKETS]; 803 atexit_root_t atexit_root; 804 tsd_metadata_t tsd_metadata; 805 tls_metadata_t tls_metadata; 806 /* 807 * Every object before this point has size and alignment of 64 bytes. 808 * Don't add any other type of data before this point. 809 */ 810 char primary_map; /* set when primary link map is initialized */ 811 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 812 char pad[2]; 813 uberflags_t uberflags; 814 queue_head_t *queue_head; 815 thr_hash_table_t *thr_hash_table; 816 uint_t hash_size; /* # of entries in thr_hash_table[] */ 817 uint_t hash_mask; /* hash_size - 1 */ 818 ulwp_t *ulwp_one; /* main thread */ 819 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 820 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 821 int nthreads; /* total number of live threads/lwps */ 822 int nzombies; /* total number of zombie threads */ 823 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 824 pid_t pid; /* the current process's pid */ 825 void (*sigacthandler)(int, siginfo_t *, void *); 826 ulwp_t *lwp_stacks; 827 ulwp_t *lwp_laststack; 828 int nfreestack; 829 int thread_stack_cache; 830 ulwp_t *ulwp_freelist; 831 ulwp_t *ulwp_lastfree; 832 ulwp_t *ulwp_replace_free; 833 ulwp_t *ulwp_replace_last; 834 atfork_t *atforklist; /* circular Q for fork handlers */ 835 robust_t **robustlocks; /* table of registered robust locks */ 836 struct uberdata **tdb_bootstrap; 837 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 838 } uberdata_t; 839 840 #define link_lock _link_lock.pad_lock 841 #define fork_lock _fork_lock.pad_lock 842 #define atfork_lock _atfork_lock.pad_lock 843 #define callout_lock _callout_lock.pad_lock 844 #define tdb_hash_lock _tdb_hash_lock.pad_lock 845 846 #pragma align 64(__uberdata) 847 extern uberdata_t __uberdata; 848 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 849 extern int primary_link_map; 850 851 #define ulwp_mutex(ulwp, udp) \ 852 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 853 #define ulwp_condvar(ulwp, udp) \ 854 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 855 856 /* 857 * Grab and release the hash table lock for the specified lwp. 858 */ 859 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 860 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 861 862 #ifdef _SYSCALL32 /* needed by libc_db */ 863 864 typedef struct ulwp32 { 865 #if defined(__sparc) 866 uint32_t ul_dinstr; /* scratch space for dtrace */ 867 uint32_t ul_padsparc0[15]; 868 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 869 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 870 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 871 uint32_t ul_dreturn; /* dtrace: return %o0 */ 872 #endif 873 caddr32_t ul_self; /* pointer to self */ 874 #if defined(__x86) 875 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 876 #endif 877 caddr32_t ul_uberdata; /* uber (super-global) data */ 878 tls32_t ul_tls; /* dynamic thread-local storage base */ 879 caddr32_t ul_forw; /* forw, back all_lwps list, */ 880 caddr32_t ul_back; /* protected by link_lock */ 881 caddr32_t ul_next; /* list to keep track of stacks */ 882 caddr32_t ul_hash; /* hash chain linked list */ 883 caddr32_t ul_rval; /* return value from thr_exit() */ 884 caddr32_t ul_stk; /* mapping base of the stack */ 885 size32_t ul_mapsiz; /* mapping size of the stack */ 886 size32_t ul_guardsize; /* normally _lpagesize */ 887 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 888 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 889 stack32_t ul_ustack; /* current stack boundaries */ 890 int ul_ix; /* hash index */ 891 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 892 pri_t ul_pri; /* priority known to the library */ 893 pri_t ul_mappedpri; /* priority known to the application */ 894 char ul_policy; /* scheduling policy */ 895 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 896 union { 897 struct { 898 char cursig; /* deferred signal number */ 899 char pleasestop; /* lwp requested to stop itself */ 900 } s; 901 short curplease; /* for testing both at once */ 902 } ul_cp; 903 char ul_stop; /* reason for stopping */ 904 char ul_signalled; /* this lwp was cond_signal()d */ 905 char ul_dead; /* this lwp has called thr_exit */ 906 char ul_unwind; /* posix: unwind C++ stack */ 907 char ul_detached; /* THR_DETACHED at thread_create() */ 908 /* or pthread_detach() was called */ 909 char ul_writer; /* sleeping in rw_wrlock() */ 910 char ul_stopping; /* set by curthread: stopping self */ 911 char ul_cancel_prologue; /* for _cancel_prologue() */ 912 short ul_preempt; /* no_preempt()/preempt() */ 913 short ul_savpreempt; /* pre-existing preempt value */ 914 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 915 char ul_main; /* thread is the main thread */ 916 char ul_fork; /* thread is performing a fork */ 917 char ul_primarymap; /* primary link-map is initialized */ 918 /* per-thread copies of the corresponding global variables */ 919 uint8_t ul_max_spinners; /* thread_max_spinners */ 920 char ul_door_noreserve; /* thread_door_noreserve */ 921 char ul_queue_fifo; /* thread_queue_fifo */ 922 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 923 char ul_error_detection; /* thread_error_detection */ 924 char ul_async_safe; /* thread_async_safe */ 925 char ul_pad1; 926 char ul_save_state; /* bind_guard() interface to ld.so.1 */ 927 int ul_adaptive_spin; /* thread_adaptive_spin */ 928 int ul_queue_spin; /* thread_queue_spin */ 929 int ul_critical; /* non-zero == in a critical region */ 930 int ul_sigdefer; /* non-zero == defer signals */ 931 int ul_vfork; /* thread is the child of vfork() */ 932 int ul_cancelable; /* _cancelon()/_canceloff() */ 933 char ul_cancel_pending; /* pthread_cancel() was called */ 934 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 935 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 936 char ul_save_async; /* saved copy of ul_cancel_async */ 937 char ul_mutator; /* lwp is a mutator (java interface) */ 938 char ul_created; /* created suspended */ 939 char ul_replace; /* replacement; must be free()d */ 940 uchar_t ul_nocancel; /* cancellation can't happen */ 941 int ul_errno; /* per-thread errno */ 942 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 943 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 944 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 945 caddr32_t ul_schedctl; /* schedctl data */ 946 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 947 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 948 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 949 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 950 td_evbuf32_t ul_td_evbuf; /* event buffer */ 951 char ul_td_events_enable; /* event mechanism enabled */ 952 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 953 char ul_qtype; /* MX or CV */ 954 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 955 int ul_usropts; /* flags given to thr_create() */ 956 caddr32_t ul_startpc; /* start func (thr_create()) */ 957 caddr32_t ul_startarg; /* argument for start function */ 958 caddr32_t ul_wchan; /* synch object when sleeping */ 959 caddr32_t ul_link; /* sleep queue link */ 960 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 961 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 962 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 963 pri_t ul_epri; /* effective scheduling priority */ 964 pri_t ul_emappedpri; /* effective mapped priority */ 965 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 966 /* 0 means there is but a single entry */ 967 union { /* single entry or pointer to array */ 968 readlock32_t single; 969 caddr32_t array; 970 } ul_readlock; 971 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 972 /* 0 means there is but a single entry */ 973 union { /* single entry or pointer to array */ 974 caddr32_t single; 975 caddr32_t array; 976 } ul_heldlocks; 977 /* PROBE_SUPPORT begin */ 978 caddr32_t ul_tpdp; 979 /* PROBE_SUPPORT end */ 980 caddr32_t ul_siglink; /* pointer to previous context */ 981 uint_t ul_spin_lock_spin; /* spin lock statistics */ 982 uint_t ul_spin_lock_spin2; 983 uint_t ul_spin_lock_sleep; 984 uint_t ul_spin_lock_wakeup; 985 /* the following members *must* be last in the structure */ 986 /* they are discarded when ulwp is replaced on thr_exit() */ 987 sigset32_t ul_sigmask; /* thread's current signal mask */ 988 sigset32_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 989 siginfo32_t ul_siginfo; /* deferred siginfo */ 990 mutex_t ul_spinlock; /* used when suspending/continuing */ 991 fpuenv32_t ul_fpuenv; /* floating point state */ 992 caddr32_t ul_sp; /* stack pointer when blocked */ 993 #if defined(sparc) 994 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 995 #endif 996 } ulwp32_t; 997 998 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 999 1000 typedef struct uberdata32 { 1001 pad_lock_t _link_lock; 1002 pad32_lock_t _fork_lock; 1003 pad32_lock_t _atfork_lock; 1004 pad32_lock_t _callout_lock; 1005 pad32_lock_t _tdb_hash_lock; 1006 tdb_sync_stats_t tdb_hash_lock_stats; 1007 siguaction32_t siguaction[NSIG]; 1008 bucket32_t bucket[NBUCKETS]; 1009 atexit_root32_t atexit_root; 1010 tsd_metadata32_t tsd_metadata; 1011 tls_metadata32_t tls_metadata; 1012 char primary_map; 1013 char bucket_init; 1014 char pad[2]; 1015 uberflags_t uberflags; 1016 caddr32_t queue_head; 1017 caddr32_t thr_hash_table; 1018 uint_t hash_size; 1019 uint_t hash_mask; 1020 caddr32_t ulwp_one; 1021 caddr32_t all_lwps; 1022 caddr32_t all_zombies; 1023 int nthreads; 1024 int nzombies; 1025 int ndaemons; 1026 int pid; 1027 caddr32_t sigacthandler; 1028 caddr32_t lwp_stacks; 1029 caddr32_t lwp_laststack; 1030 int nfreestack; 1031 int thread_stack_cache; 1032 caddr32_t ulwp_freelist; 1033 caddr32_t ulwp_lastfree; 1034 caddr32_t ulwp_replace_free; 1035 caddr32_t ulwp_replace_last; 1036 caddr32_t atforklist; 1037 caddr32_t robustlocks; 1038 caddr32_t tdb_bootstrap; 1039 tdb32_t tdb; 1040 } uberdata32_t; 1041 1042 #endif /* _SYSCALL32 */ 1043 1044 /* ul_stop values */ 1045 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1046 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1047 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1048 1049 /* 1050 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1051 */ 1052 1053 typedef struct _cvattr { 1054 int pshared; 1055 clockid_t clockid; 1056 } cvattr_t; 1057 1058 typedef struct _mattr { 1059 int pshared; 1060 int protocol; 1061 int prioceiling; 1062 int type; 1063 int robustness; 1064 } mattr_t; 1065 1066 typedef struct _thrattr { 1067 size_t stksize; 1068 void *stkaddr; 1069 int detachstate; 1070 int daemonstate; 1071 int scope; 1072 int prio; 1073 int policy; 1074 int inherit; 1075 size_t guardsize; 1076 } thrattr_t; 1077 1078 typedef struct _rwlattr { 1079 int pshared; 1080 } rwlattr_t; 1081 1082 /* _curthread() is inline for speed */ 1083 extern ulwp_t *_curthread(void); 1084 #define curthread (_curthread()) 1085 1086 /* this version (also inline) can be tested for NULL */ 1087 extern ulwp_t *__curthread(void); 1088 1089 /* get the current stack pointer (also inline) */ 1090 extern greg_t stkptr(void); 1091 1092 /* 1093 * Suppress __attribute__((...)) if we are not compiling with gcc 1094 */ 1095 #if !defined(__GNUC__) 1096 #define __attribute__(string) 1097 #endif 1098 1099 /* 1100 * Implementation functions. Not visible outside of the library itself. 1101 */ 1102 extern int __nanosleep(const timespec_t *, timespec_t *); 1103 extern void getgregs(ulwp_t *, gregset_t); 1104 extern void setgregs(ulwp_t *, gregset_t); 1105 extern void thr_panic(const char *); 1106 #pragma rarely_called(thr_panic) 1107 extern ulwp_t *find_lwp(thread_t); 1108 extern int real_priority(ulwp_t *); 1109 extern void finish_init(void); 1110 extern void queue_alloc(void); 1111 extern void tsd_exit(void); 1112 extern void tsd_free(ulwp_t *); 1113 extern void tls_setup(void); 1114 extern void tls_exit(void); 1115 extern void tls_free(ulwp_t *); 1116 extern void rwl_free(ulwp_t *); 1117 extern void heldlock_exit(void); 1118 extern void heldlock_free(ulwp_t *); 1119 extern void sigacthandler(int, siginfo_t *, void *); 1120 extern void signal_init(void); 1121 extern int sigequalset(const sigset_t *, const sigset_t *); 1122 extern void mutex_setup(void); 1123 extern void take_deferred_signal(int); 1124 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1125 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1126 extern volatile sc_shared_t *setup_schedctl(void); 1127 extern void *lmalloc(size_t); 1128 extern void lfree(void *, size_t); 1129 extern void *libc_malloc(size_t); 1130 extern void *libc_realloc(void *, size_t); 1131 extern void libc_free(void *); 1132 extern char *libc_strdup(const char *); 1133 extern void ultos(uint64_t, int, char *); 1134 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1135 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1136 extern void thread_error(const char *); 1137 extern void grab_assert_lock(void); 1138 extern void dump_queue_statistics(void); 1139 extern void collect_queue_statistics(void); 1140 extern void record_spin_locks(ulwp_t *); 1141 extern void remember_lock(mutex_t *); 1142 extern void forget_lock(mutex_t *); 1143 extern void register_lock(mutex_t *); 1144 extern void unregister_locks(void); 1145 #if defined(__sparc) 1146 extern void _flush_windows(void); 1147 #else 1148 #define _flush_windows() 1149 #endif 1150 extern void set_curthread(void *); 1151 1152 /* 1153 * Utility function used when waking up many threads (more than MAXLWPS) 1154 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1155 */ 1156 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1157 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1158 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1159 1160 /* enter a critical section */ 1161 #define enter_critical(self) (self->ul_critical++) 1162 1163 /* exit a critical section, take deferred actions if necessary */ 1164 extern void do_exit_critical(void); 1165 #define exit_critical(self) \ 1166 (void) (self->ul_critical--, \ 1167 ((self->ul_curplease && self->ul_critical == 0)? \ 1168 (do_exit_critical(), 0) : 0)) 1169 1170 /* 1171 * Like enter_critical()/exit_critical() but just for deferring signals. 1172 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1173 * calling application functions like constructors and destructors. 1174 * Care must be taken if the application function attempts to set 1175 * the signal mask while a deferred signal is present; the setting 1176 * of the signal mask must also be deferred. 1177 */ 1178 #define sigoff(self) (self->ul_sigdefer++) 1179 extern void sigon(ulwp_t *); 1180 1181 /* these are exported functions */ 1182 extern void _sigoff(void); 1183 extern void _sigon(void); 1184 1185 #define sigorset(s1, s2) \ 1186 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1187 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1188 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1189 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1190 1191 #define sigandset(s1, s2) \ 1192 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1193 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1194 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1195 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1196 1197 #define sigdiffset(s1, s2) \ 1198 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1199 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1200 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1201 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1202 1203 #define delete_reserved_signals(s) \ 1204 (((s)->__sigbits[0] &= MASKSET0), \ 1205 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1206 ((s)->__sigbits[2] = 0), \ 1207 ((s)->__sigbits[3] = 0)) 1208 1209 extern void block_all_signals(ulwp_t *self); 1210 1211 /* 1212 * When restoring the signal mask after having previously called 1213 * block_all_signals(), if we have a deferred signal present then 1214 * do nothing other than ASSERT() that we are in a critical region. 1215 * The signal mask will be set when we emerge from the critical region 1216 * and call take_deferred_signal(). There is no race condition here 1217 * because the kernel currently has all signals blocked for this thread. 1218 */ 1219 #define restore_signals(self) \ 1220 ((void) ((self)->ul_cursig? \ 1221 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1222 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask, NULL))) 1223 1224 extern void set_cancel_pending_flag(ulwp_t *, int); 1225 extern void set_cancel_eintr_flag(ulwp_t *); 1226 extern void set_parking_flag(ulwp_t *, int); 1227 extern int cancel_active(void); 1228 1229 extern void *_thr_setup(ulwp_t *); 1230 extern void _fpinherit(ulwp_t *); 1231 extern void _lwp_start(void); 1232 extern void _lwp_terminate(void); 1233 extern void lmutex_lock(mutex_t *); 1234 extern void lmutex_unlock(mutex_t *); 1235 extern void lrw_rdlock(rwlock_t *); 1236 extern void lrw_wrlock(rwlock_t *); 1237 extern void lrw_unlock(rwlock_t *); 1238 extern void sig_mutex_lock(mutex_t *); 1239 extern void sig_mutex_unlock(mutex_t *); 1240 extern int sig_mutex_trylock(mutex_t *); 1241 extern int sig_cond_wait(cond_t *, mutex_t *); 1242 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1243 extern void cancel_safe_mutex_lock(mutex_t *); 1244 extern void cancel_safe_mutex_unlock(mutex_t *); 1245 extern int cancel_safe_mutex_trylock(mutex_t *); 1246 extern void _prefork_handler(void); 1247 extern void _postfork_parent_handler(void); 1248 extern void _postfork_child_handler(void); 1249 extern void postfork1_child(void); 1250 extern void postfork1_child_aio(void); 1251 extern void postfork1_child_sigev_aio(void); 1252 extern void postfork1_child_sigev_mq(void); 1253 extern void postfork1_child_sigev_timer(void); 1254 extern void postfork1_child_tpool(void); 1255 extern void fork_lock_enter(void); 1256 extern void fork_lock_exit(void); 1257 extern void suspend_fork(void); 1258 extern void continue_fork(int); 1259 extern void do_sigcancel(void); 1260 extern void setup_cancelsig(int); 1261 extern void init_sigev_thread(void); 1262 extern void init_aio(void); 1263 extern void _cancelon(void); 1264 extern void _canceloff(void); 1265 extern void _canceloff_nocancel(void); 1266 extern void _cancel_prologue(void); 1267 extern void _cancel_epilogue(void); 1268 extern void no_preempt(ulwp_t *); 1269 extern void preempt(ulwp_t *); 1270 extern void _thrp_unwind(void *); 1271 1272 /* 1273 * Prototypes for the strong versions of the interface functions 1274 */ 1275 extern pid_t __forkx(int); 1276 extern pid_t __forkallx(int); 1277 extern pid_t _private_getpid(void); 1278 extern uid_t _private_geteuid(void); 1279 extern int _kill(pid_t, int); 1280 extern int _private_open(const char *, int, ...); 1281 extern int _private_close(int); 1282 extern ssize_t __read(int, void *, size_t); 1283 extern ssize_t __write(int, const void *, size_t); 1284 extern void *_memcpy(void *, const void *, size_t); 1285 extern void *_memset(void *, int, size_t); 1286 extern int _memcmp(const void *, const void *, size_t); 1287 extern void *_private_memcpy(void *, const void *, size_t); 1288 extern void *_private_memset(void *, int, size_t); 1289 extern int _private_sigfillset(sigset_t *); 1290 extern int _private_sigemptyset(sigset_t *); 1291 extern int _private_sigaddset(sigset_t *, int); 1292 extern int _private_sigdelset(sigset_t *, int); 1293 extern int _private_sigismember(sigset_t *, int); 1294 extern void *_private_mmap(void *, size_t, int, int, int, off_t); 1295 extern int _private_mprotect(void *, size_t, int); 1296 extern int _private_munmap(void *, size_t); 1297 extern int _private_getrlimit(int, struct rlimit *); 1298 extern int __lwp_continue(lwpid_t); 1299 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1300 extern int __lwp_kill(lwpid_t, int); 1301 extern lwpid_t __lwp_self(void); 1302 extern int ___lwp_suspend(lwpid_t); 1303 extern void lwp_yield(void); 1304 extern int lwp_wait(lwpid_t, lwpid_t *); 1305 extern int __lwp_wait(lwpid_t, lwpid_t *); 1306 extern int __lwp_detach(lwpid_t); 1307 extern sc_shared_t *__schedctl(void); 1308 1309 extern int _private_setcontext(const ucontext_t *); 1310 extern int _private_getcontext(ucontext_t *); 1311 #pragma unknown_control_flow(_private_getcontext) 1312 /* actual system call traps */ 1313 extern int __setcontext_syscall(const ucontext_t *); 1314 extern int __getcontext_syscall(ucontext_t *); 1315 extern int _private_setustack(stack_t *); 1316 extern int __clock_gettime(clockid_t, timespec_t *); 1317 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1318 extern void hrt2ts(hrtime_t, timespec_t *); 1319 1320 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1321 extern int __lwp_sigmask(int, const sigset_t *, sigset_t *); 1322 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1323 extern caddr_t __sighndlrend; 1324 #pragma unknown_control_flow(__sighndlr) 1325 extern void _siglongjmp(sigjmp_buf, int); 1326 1327 extern int _pthread_setspecific(pthread_key_t, const void *); 1328 extern void *_pthread_getspecific(pthread_key_t); 1329 extern void _pthread_exit(void *); 1330 extern int _pthread_setcancelstate(int, int *); 1331 extern void _private_testcancel(void); 1332 1333 /* belongs in <pthread.h> */ 1334 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1335 #define PTHREAD_CREATE_NONDAEMON_NP 0 1336 extern int _pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1337 extern int _pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1338 1339 /* these are private to the library */ 1340 extern int _private_mutex_init(mutex_t *, int, void *); 1341 extern int _private_mutex_destroy(mutex_t *); 1342 extern int _private_mutex_lock(mutex_t *); 1343 extern int _private_mutex_trylock(mutex_t *); 1344 extern int _private_mutex_unlock(mutex_t *); 1345 1346 extern int _mutex_init(mutex_t *, int, void *); 1347 extern int _mutex_destroy(mutex_t *); 1348 extern int _mutex_consistent(mutex_t *); 1349 extern int _mutex_lock(mutex_t *); 1350 extern int _mutex_trylock(mutex_t *); 1351 extern int _mutex_unlock(mutex_t *); 1352 extern int __mutex_init(mutex_t *, int, void *); 1353 extern int __mutex_destroy(mutex_t *); 1354 extern int __mutex_consistent(mutex_t *); 1355 extern int __mutex_lock(mutex_t *); 1356 extern int __mutex_trylock(mutex_t *); 1357 extern int __mutex_unlock(mutex_t *); 1358 extern int mutex_is_held(mutex_t *); 1359 1360 extern int _cond_init(cond_t *, int, void *); 1361 extern int _cond_signal(cond_t *); 1362 extern int _cond_broadcast(cond_t *); 1363 extern int _cond_destroy(cond_t *); 1364 extern int cond_signal_internal(cond_t *); 1365 extern int cond_broadcast_internal(cond_t *); 1366 /* cancellation points: */ 1367 extern int _cond_wait(cond_t *, mutex_t *); 1368 extern int _cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1369 extern int _cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1370 /* not cancellation points: */ 1371 extern int __cond_wait(cond_t *, mutex_t *); 1372 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1373 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1374 1375 extern int __rwlock_init(rwlock_t *, int, void *); 1376 extern int rw_read_is_held(rwlock_t *); 1377 extern int rw_write_is_held(rwlock_t *); 1378 1379 extern void _membar_enter(void); 1380 extern void _membar_exit(void); 1381 extern void _membar_producer(void); 1382 extern void _membar_consumer(void); 1383 1384 extern int _thr_continue(thread_t); 1385 extern int _thr_create(void *, size_t, void *(*)(void *), void *, long, 1386 thread_t *); 1387 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1388 thread_t *, pri_t, int, size_t); 1389 extern int _thr_getprio(thread_t, int *); 1390 extern int _thr_getspecific(thread_key_t, void **); 1391 extern int _thr_join(thread_t, thread_t *, void **); 1392 extern int _thr_keycreate(thread_key_t *, PFrV); 1393 extern int _thr_keycreate_once(thread_key_t *, PFrV); 1394 extern int _thr_key_delete(thread_key_t); 1395 extern int _thr_main(void); 1396 extern thread_t _thr_self(void); 1397 extern int _thr_getconcurrency(void); 1398 extern int _thr_setconcurrency(int); 1399 extern int _thr_setprio(thread_t, int); 1400 extern int _thr_setspecific(thread_key_t, void *); 1401 extern int _thr_stksegment(stack_t *); 1402 extern int _thrp_suspend(thread_t, uchar_t); 1403 extern int _thrp_continue(thread_t, uchar_t); 1404 extern int _thr_sigsetmask(int, const sigset_t *, sigset_t *); 1405 1406 extern void _thr_terminate(void *); 1407 extern void _thr_exit(void *); 1408 extern void _thrp_exit(void); 1409 1410 extern const thrattr_t *def_thrattr(void); 1411 extern int _thread_setschedparam_main(pthread_t, int, 1412 const struct sched_param *, int); 1413 extern int _validate_rt_prio(int, int); 1414 extern int _thrp_setlwpprio(lwpid_t, int, int); 1415 extern pri_t map_rtpri_to_gp(pri_t); 1416 extern int get_info_by_policy(int); 1417 1418 /* 1419 * System call wrappers (direct interfaces to the kernel) 1420 */ 1421 extern int ___lwp_mutex_register(mutex_t *); 1422 extern int ___lwp_mutex_trylock(mutex_t *); 1423 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *); 1424 extern int ___lwp_mutex_unlock(mutex_t *); 1425 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1426 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1427 extern int __lwp_cond_signal(lwp_cond_t *); 1428 extern int __lwp_cond_broadcast(lwp_cond_t *); 1429 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1430 extern int __lwp_sema_trywait(lwp_sema_t *); 1431 extern int __lwp_sema_post(lwp_sema_t *); 1432 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1433 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1434 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1435 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1436 extern int __lwp_rwlock_unlock(rwlock_t *); 1437 extern int __lwp_park(timespec_t *, lwpid_t); 1438 extern int __lwp_unpark(lwpid_t); 1439 extern int __lwp_unpark_all(lwpid_t *, int); 1440 #if defined(__x86) 1441 extern int ___lwp_private(int, int, void *); 1442 #endif /* __x86 */ 1443 1444 extern int _private_lwp_mutex_lock(mutex_t *); 1445 extern int _private_lwp_mutex_unlock(mutex_t *); 1446 1447 /* 1448 * inlines 1449 */ 1450 extern int set_lock_byte(volatile uint8_t *); 1451 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1452 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1453 extern void atomic_inc_32(volatile uint32_t *); 1454 extern void atomic_dec_32(volatile uint32_t *); 1455 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1456 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1457 #if defined(__sparc) 1458 extern ulong_t caller(void); 1459 extern ulong_t getfp(void); 1460 #endif /* __sparc */ 1461 1462 #include "thr_inlines.h" 1463 1464 #endif /* _THR_UBERDATA_H */ 1465