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 2007 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 /* lock.lock64.pad[x] 4 5 6 7 */ 106 #define LOCKMASK 0xff000000 107 #define WAITERMASK 0x000000ff 108 #define SPINNERMASK 0x00ff0000 109 #define SPINNERSHIFT 16 110 #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 SPINNERMASK 0x0000ff00 118 #define SPINNERSHIFT 8 119 #define WAITER 0x00010000 120 #define LOCKSET 0x01 121 #define LOCKCLEAR 0 122 #else 123 #error "neither __sparc nor __x86 is defined" 124 #endif 125 126 /* 127 * Fetch the owner of a USYNC_THREAD mutex. 128 * Don't use this with process-shared mutexes; 129 * the owing thread may be in a different process. 130 */ 131 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 132 133 /* 134 * Test if a thread owns a process-private (USYNC_THREAD) mutex. 135 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex. 136 * The 'mp' argument must not have side-effects since it is evaluated twice. 137 */ 138 #define MUTEX_OWNED(mp, thrp) \ 139 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 140 141 142 /* 143 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 144 * collection of lock statistics by a debugger or other collecting tool. 145 * 146 * uberflags.uf_thread_error_detection is set by an environment variable: 147 * _THREAD_ERROR_DETECTION 148 * 0 == no detection of locking primitive errors. 149 * 1 == detect errors and issue a warning message. 150 * 2 == detect errors, issue a warning message, and dump core. 151 * 152 * We bundle these together in uberflags.uf_trs_ted to make a test of either 153 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 154 * 155 * uberflags.uf_mt is set non-zero when the first thread (in addition 156 * to the main thread) is created. 157 * 158 * We bundle all these flags together in uberflags.uf_all to make a test 159 * of any being non-zero a single memory reference (again, for speed). 160 */ 161 typedef union { 162 int uf_all; /* combined all flags */ 163 struct { 164 short h_pad; 165 short h_trs_ted; /* combined reg sync & error detect */ 166 } uf_h; 167 struct { 168 char x_mt; 169 char x_pad; 170 char x_tdb_register_sync; 171 char x_thread_error_detection; 172 } uf_x; 173 } uberflags_t; 174 175 #define uf_mt uf_x.x_mt 176 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 177 #define uf_thread_error_detection uf_x.x_thread_error_detection 178 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 179 180 /* 181 * NOTE WELL: 182 * To enable further optimization, the "ul_schedctl_called" member 183 * of the ulwp_t structure (below) serves double-duty: 184 * 1. If NULL, it means that the thread must call __schedctl() 185 * to set up its schedctl mappings before acquiring a mutex. 186 * This is required by the implementation of adaptive mutex locking. 187 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 188 * uberflags can be made without additional memory references. 189 * This allows the common case of _mutex_lock() and _mutex_unlock() for 190 * USYNC_THREAD mutexes with no error detection and no lock statistics 191 * to be optimized for speed. 192 */ 193 194 195 /* double the default stack size for 64-bit processes */ 196 #ifdef _LP64 197 #define MINSTACK (8 * 1024) 198 #define DEFAULTSTACK (2 * 1024 * 1024) 199 #else 200 #define MINSTACK (4 * 1024) 201 #define DEFAULTSTACK (1024 * 1024) 202 #endif 203 #define TSD_NKEYS _POSIX_THREAD_KEYS_MAX 204 205 #define THREAD_MIN_PRIORITY 0 206 #define THREAD_MAX_PRIORITY 127 207 208 #define PRIO_SET 0 /* set priority and policy */ 209 #define PRIO_SET_PRIO 1 /* set priority only */ 210 #define PRIO_INHERIT 2 211 #define PRIO_DISINHERIT 3 212 213 #define MUTEX_TRY 0 214 #define MUTEX_LOCK 1 215 216 #if defined(__x86) 217 218 typedef struct { /* structure returned by fnstenv */ 219 int fctrl; /* control word */ 220 int fstat; /* status word (flags, etc) */ 221 int ftag; /* tag of which regs busy */ 222 int misc[4]; /* other stuff, 28 bytes total */ 223 } fpuenv_t; 224 225 #ifdef _SYSCALL32 226 typedef fpuenv_t fpuenv32_t; 227 #endif /* _SYSCALL32 */ 228 229 #elif defined(__sparc) 230 231 typedef struct { /* fp state structure */ 232 greg_t fsr; 233 greg_t fpu_en; 234 } fpuenv_t; 235 236 #ifdef _SYSCALL32 237 typedef struct { 238 greg32_t fsr; 239 greg32_t fpu_en; 240 } fpuenv32_t; 241 #endif /* _SYSCALL32 */ 242 243 #endif /* __x86 */ 244 245 #if defined(__x86) 246 extern void ht_pause(void); /* "pause" instruction */ 247 #define SMT_PAUSE() ht_pause() 248 #else 249 #define SMT_PAUSE() 250 #endif /* __x86 */ 251 252 /* 253 * Cleanup handler related data. 254 * This structure is exported as _cleanup_t in pthread.h. 255 * pthread.h exports only the size of this structure, so check 256 * _cleanup_t in pthread.h before making any change here. 257 */ 258 typedef struct __cleanup { 259 struct __cleanup *next; /* pointer to next handler */ 260 caddr_t fp; /* current frame pointer */ 261 void (*func)(void *); /* cleanup handler address */ 262 void *arg; /* handler's argument */ 263 } __cleanup_t; 264 265 /* 266 * Thread-Specific Data (TSD) 267 * TSD_NFAST includes the invalid key zero, so there 268 * are really only (TSD_NFAST - 1) fast key slots. 269 */ 270 typedef void (*PFrV)(void *); 271 #define TSD_UNALLOCATED ((PFrV)1) 272 #define TSD_NFAST 9 273 274 /* 275 * The tsd union is designed to burn a little memory (9 words) to make 276 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 277 * end of the pad region to increase the likelihood that it falls on the 278 * same cache line as the data. 279 */ 280 typedef union tsd { 281 uint_t tsd_nalloc; /* Amount of allocated storage */ 282 void *tsd_pad[TSD_NFAST]; 283 void *tsd_data[1]; 284 } tsd_t; 285 286 typedef struct { 287 mutex_t tsdm_lock; /* Lock protecting the data */ 288 uint_t tsdm_nkeys; /* Number of allocated keys */ 289 uint_t tsdm_nused; /* Number of used keys */ 290 PFrV *tsdm_destro; /* Per-key destructors */ 291 char tsdm_pad[64 - /* pad to 64 bytes */ 292 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 293 } tsd_metadata_t; 294 295 #ifdef _SYSCALL32 296 typedef union tsd32 { 297 uint_t tsd_nalloc; /* Amount of allocated storage */ 298 caddr32_t tsd_pad[TSD_NFAST]; 299 caddr32_t tsd_data[1]; 300 } tsd32_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 caddr32_t tsdm_destro; /* Per-key destructors */ 307 char tsdm_pad[64 - /* pad to 64 bytes */ 308 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 309 } tsd_metadata32_t; 310 #endif /* _SYSCALL32 */ 311 312 313 /* 314 * Thread-Local Storage (TLS) 315 */ 316 typedef struct { 317 void *tls_data; 318 size_t tls_size; 319 } tls_t; 320 321 typedef struct { 322 mutex_t tls_lock; /* Lock protecting the data */ 323 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 324 tls_t static_tls; /* Template for static TLS */ 325 char tls_pad[64 - /* pad to 64 bytes */ 326 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 327 } tls_metadata_t; 328 329 #ifdef _SYSCALL32 330 typedef struct { 331 caddr32_t tls_data; 332 size32_t tls_size; 333 } tls32_t; 334 335 typedef struct { 336 mutex_t tls_lock; /* Lock protecting the data */ 337 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 338 tls32_t static_tls; /* Template for static TLS */ 339 char tls_pad[64 - /* pad to 64 bytes */ 340 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 341 } tls_metadata32_t; 342 #endif /* _SYSCALL32 */ 343 344 345 /* 346 * Sleep queues for USYNC_THREAD condvars and mutexes. 347 * The size and alignment is 64 bytes to reduce cache conflicts. 348 */ 349 typedef union { 350 uint64_t qh_64[8]; 351 struct { 352 mutex_t q_lock; 353 uint8_t q_qcnt; 354 uint8_t q_pad[7]; 355 uint64_t q_lockcount; 356 uint32_t q_qlen; 357 uint32_t q_qmax; 358 struct ulwp *q_head; 359 struct ulwp *q_tail; 360 } qh_qh; 361 } queue_head_t; 362 363 #define qh_lock qh_qh.q_lock 364 #define qh_qcnt qh_qh.q_qcnt 365 #define qh_lockcount qh_qh.q_lockcount 366 #define qh_qlen qh_qh.q_qlen 367 #define qh_qmax qh_qh.q_qmax 368 #define qh_head qh_qh.q_head 369 #define qh_tail qh_qh.q_tail 370 371 /* queue types passed to queue_lock() and enqueue() */ 372 #define MX 0 373 #define CV 1 374 #define FIFOQ 0x10 /* or'ing with FIFOQ asks for FIFO queueing */ 375 #define QHASHSHIFT 9 /* number of hashing bits */ 376 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */ 377 #define QUEUE_HASH(wchan, type) ((uint_t) \ 378 ((((uintptr_t)(wchan) >> 3) \ 379 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \ 380 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 381 382 extern queue_head_t *queue_lock(void *, int); 383 extern void queue_unlock(queue_head_t *); 384 extern void enqueue(queue_head_t *, struct ulwp *, void *, int); 385 extern struct ulwp *dequeue(queue_head_t *, void *, int *); 386 extern struct ulwp *queue_waiter(queue_head_t *, void *); 387 extern struct ulwp *queue_unlink(queue_head_t *, 388 struct ulwp **, struct ulwp *); 389 extern uint8_t dequeue_self(queue_head_t *, void *); 390 extern void unsleep_self(void); 391 extern void spin_lock_set(mutex_t *); 392 extern void spin_lock_clear(mutex_t *); 393 394 /* 395 * Memory block for chain of owned ceiling mutexes. 396 */ 397 typedef struct mxchain { 398 struct mxchain *mxchain_next; 399 mutex_t *mxchain_mx; 400 } mxchain_t; 401 402 /* 403 * Pointer to an rwlock that is held for reading. 404 * Used in rw_rdlock() to allow a thread that already holds a read 405 * lock to acquire another read lock on the same rwlock even if 406 * there are writers waiting. This to avoid deadlock when acquiring 407 * a read lock more than once in the presence of pending writers. 408 * POSIX mandates this behavior. 409 */ 410 typedef struct { 411 void *rd_rwlock; /* the rwlock held for reading */ 412 size_t rd_count; /* count of read locks applied */ 413 } readlock_t; 414 415 #ifdef _SYSCALL32 416 typedef struct { 417 caddr32_t rd_rwlock; 418 size32_t rd_count; 419 } readlock32_t; 420 #endif /* _SYSCALL32 */ 421 422 /* 423 * Maximum number of read locks allowed for one thread on one rwlock. 424 * This could be as large as INT_MAX, but the SUSV3 test suite would 425 * take an inordinately long time to complete. This is big enough. 426 */ 427 #define READ_LOCK_MAX 100000 428 429 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 430 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 431 432 /* 433 * Round up an integral value to a multiple of 64 434 */ 435 #define roundup64(x) (-(-(x) & -64)) 436 437 /* 438 * NOTE: Whatever changes are made to ulwp_t must be 439 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 440 * 441 * NOTE: ul_self *must* be the first member of ulwp_t on x86 442 * Low-level x86 code relies on this. 443 */ 444 typedef struct ulwp { 445 /* 446 * These members always need to come first on sparc. 447 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 448 */ 449 #if defined(__sparc) 450 uint32_t ul_dinstr; /* scratch space for dtrace */ 451 uint32_t ul_padsparc0[15]; 452 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 453 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 454 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 455 uint32_t ul_dreturn; /* dtrace: return %o0 */ 456 #endif 457 struct ulwp *ul_self; /* pointer to self */ 458 #if defined(__i386) 459 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 460 #elif defined(__amd64) 461 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 462 #endif 463 struct uberdata *ul_uberdata; /* uber (super-global) data */ 464 tls_t ul_tls; /* dynamic thread-local storage base */ 465 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 466 struct ulwp *ul_back; /* protected by link_lock */ 467 struct ulwp *ul_next; /* list to keep track of stacks */ 468 struct ulwp *ul_hash; /* hash chain linked list */ 469 void *ul_rval; /* return value from thr_exit() */ 470 caddr_t ul_stk; /* mapping base of the stack */ 471 size_t ul_mapsiz; /* mapping size of the stack */ 472 size_t ul_guardsize; /* normally _lpagesize */ 473 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 474 size_t ul_stksiz; /* broken thr_stksegment() interface */ 475 stack_t ul_ustack; /* current stack boundaries */ 476 int ul_ix; /* hash index */ 477 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 478 pri_t ul_pri; /* priority known to the library */ 479 pri_t ul_mappedpri; /* priority known to the application */ 480 char ul_policy; /* scheduling policy */ 481 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 482 union { 483 struct { 484 char cursig; /* deferred signal number */ 485 char pleasestop; /* lwp requested to stop itself */ 486 } s; 487 short curplease; /* for testing both at once */ 488 } ul_cp; 489 char ul_stop; /* reason for stopping */ 490 char ul_signalled; /* this lwp was cond_signal()d */ 491 char ul_dead; /* this lwp has called thr_exit */ 492 char ul_unwind; /* posix: unwind C++ stack */ 493 char ul_detached; /* THR_DETACHED at thread_create() */ 494 /* or pthread_detach() was called */ 495 char ul_writer; /* sleeping in rw_wrlock() */ 496 char ul_stopping; /* set by curthread: stopping self */ 497 char ul_cancel_prologue; /* for _cancel_prologue() */ 498 short ul_preempt; /* no_preempt()/preempt() */ 499 short ul_savpreempt; /* pre-existing preempt value */ 500 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 501 char ul_main; /* thread is the main thread */ 502 char ul_fork; /* thread is performing a fork */ 503 char ul_primarymap; /* primary link-map is initialized */ 504 /* per-thread copies of the corresponding global variables */ 505 uint8_t ul_max_spinners; /* thread_max_spinners */ 506 char ul_door_noreserve; /* thread_door_noreserve */ 507 char ul_queue_fifo; /* thread_queue_fifo */ 508 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 509 char ul_error_detection; /* thread_error_detection */ 510 char ul_async_safe; /* thread_async_safe */ 511 char ul_pad1[2]; 512 int ul_adaptive_spin; /* thread_adaptive_spin */ 513 int ul_queue_spin; /* thread_queue_spin */ 514 volatile int ul_critical; /* non-zero == in a critical region */ 515 int ul_sigdefer; /* non-zero == defer signals */ 516 int ul_vfork; /* thread is the child of vfork() */ 517 int ul_cancelable; /* _cancelon()/_canceloff() */ 518 char ul_cancel_pending; /* pthread_cancel() was called */ 519 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 520 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 521 char ul_save_async; /* saved copy of ul_cancel_async */ 522 char ul_mutator; /* lwp is a mutator (java interface) */ 523 char ul_created; /* created suspended */ 524 char ul_replace; /* replacement; must be free()d */ 525 uchar_t ul_nocancel; /* cancellation can't happen */ 526 int ul_errno; /* per-thread errno */ 527 int *ul_errnop; /* pointer to errno or self->ul_errno */ 528 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 529 uberflags_t *volatile ul_schedctl_called; /* ul_schedctl is set up */ 530 volatile sc_shared_t *volatile ul_schedctl; /* schedctl data */ 531 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 532 int ul_pad2; 533 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 534 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 535 td_evbuf_t ul_td_evbuf; /* event buffer */ 536 char ul_td_events_enable; /* event mechanism enabled */ 537 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 538 char ul_qtype; /* MX or CV */ 539 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 540 int ul_usropts; /* flags given to thr_create() */ 541 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 542 void *ul_startarg; /* argument for start function */ 543 void *ul_wchan; /* synch object when sleeping */ 544 struct ulwp *ul_link; /* sleep queue link */ 545 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 546 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 547 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 548 pri_t ul_epri; /* effective scheduling priority */ 549 pri_t ul_emappedpri; /* effective mapped priority */ 550 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 551 /* 0 means there is but a single entry */ 552 union { /* single entry or pointer to array */ 553 readlock_t single; 554 readlock_t *array; 555 } ul_readlock; 556 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 557 /* 0 means there is but a single entry */ 558 union { /* single entry or pointer to array */ 559 mutex_t *single; 560 mutex_t **array; 561 } ul_heldlocks; 562 /* PROBE_SUPPORT begin */ 563 void *ul_tpdp; 564 /* PROBE_SUPPORT end */ 565 ucontext_t *ul_siglink; /* pointer to previous context */ 566 uint_t ul_spin_lock_spin; /* spin lock statistics */ 567 uint_t ul_spin_lock_spin2; 568 uint_t ul_spin_lock_sleep; 569 uint_t ul_spin_lock_wakeup; 570 /* the following members *must* be last in the structure */ 571 /* they are discarded when ulwp is replaced on thr_exit() */ 572 sigset_t ul_sigmask; /* thread's current signal mask */ 573 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 574 siginfo_t ul_siginfo; /* deferred siginfo */ 575 mutex_t ul_spinlock; /* used when suspending/continuing */ 576 fpuenv_t ul_fpuenv; /* floating point state */ 577 uintptr_t ul_sp; /* stack pointer when blocked */ 578 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 579 #if defined(sparc) 580 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 581 #endif 582 } ulwp_t; 583 584 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 585 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 586 #define ul_curplease ul_cp.curplease /* for testing both at once */ 587 588 /* 589 * This is the size of a replacement ulwp, retained only for the benefit 590 * of thr_join(). The trailing members are unneeded for this purpose. 591 */ 592 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 593 594 /* 595 * Definitions for static initialization of signal sets, 596 * plus some sneaky optimizations in various places. 597 */ 598 599 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 600 601 #if (MAXSIG > 32 && MAXSIG <= 64) 602 #define FILLSET0 0xffffffffu 603 #define FILLSET1 ((1u << (MAXSIG - 32)) - 1) 604 #else 605 #error "fix me: MAXSIG out of bounds" 606 #endif 607 608 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 609 #define CANTMASK1 0 610 611 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 612 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 613 614 extern const sigset_t maskset; /* set of all maskable signals */ 615 616 extern int thread_adaptive_spin; 617 extern uint_t thread_max_spinners; 618 extern int thread_queue_spin; 619 extern int thread_queue_fifo; 620 extern int thread_queue_dump; 621 extern int thread_cond_wait_defer; 622 extern int thread_async_safe; 623 extern int thread_queue_verify; 624 625 /* 626 * pthread_atfork() related data, used to store atfork handlers. 627 */ 628 typedef struct atfork { 629 struct atfork *forw; /* forward pointer */ 630 struct atfork *back; /* backward pointer */ 631 void (*prepare)(void); /* pre-fork handler */ 632 void (*parent)(void); /* post-fork parent handler */ 633 void (*child)(void); /* post-fork child handler */ 634 } atfork_t; 635 636 /* 637 * Element in the table of registered process robust locks. 638 * We keep track of these to make sure that we only call 639 * ___lwp_mutex_register() once for each such lock. 640 */ 641 typedef struct robust { 642 struct robust *robust_next; 643 mutex_t *robust_lock; 644 } robust_t; 645 646 /* 647 * Parameters of the lock registration hash table. 648 */ 649 #define LOCKSHIFT 9 /* number of hashing bits */ 650 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<9 == 512) */ 651 #define LOCK_HASH(addr) (uint_t) \ 652 ((((uintptr_t)(addr) >> 3) \ 653 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 654 & (LOCKHASHSZ - 1)) 655 656 /* 657 * Make our hot locks reside on private cache lines (64 bytes). 658 */ 659 typedef struct { 660 mutex_t pad_lock; 661 char pad_pad[64 - sizeof (mutex_t)]; 662 } pad_lock_t; 663 664 /* 665 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 666 */ 667 typedef struct { 668 mutex_t pad_lock; 669 char pad_pad[32 - sizeof (mutex_t)]; 670 } pad32_lock_t; 671 672 /* 673 * The threads hash table is used for fast lookup and locking of an active 674 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 675 * thr_hash_table_t structures, where N == 1 before the main thread creates 676 * the first additional thread and N == 1024 afterwards. Each element of the 677 * table is 64 bytes in size and alignment to reduce cache conflicts. 678 */ 679 typedef struct { 680 mutex_t hash_lock; /* lock per bucket */ 681 cond_t hash_cond; /* convar per bucket */ 682 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 683 char hash_pad[64 - /* pad out to 64 bytes */ 684 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 685 } thr_hash_table_t; 686 687 #ifdef _SYSCALL32 688 typedef struct { 689 mutex_t hash_lock; 690 cond_t hash_cond; 691 caddr32_t hash_bucket; 692 char hash_pad[64 - 693 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 694 } thr_hash_table32_t; 695 #endif /* _SYSCALL32 */ 696 697 698 /* 699 * siguaction members have 128-byte size and 64-byte alignment. 700 * We know that sizeof (struct sigaction) is 32 bytes for both 701 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 702 */ 703 typedef struct { 704 rwlock_t sig_lock; 705 struct sigaction sig_uaction; 706 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 707 } siguaction_t; 708 709 #ifdef _SYSCALL32 710 typedef struct { 711 rwlock_t sig_lock; 712 struct sigaction32 sig_uaction; 713 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 714 } siguaction32_t; 715 #endif /* _SYSCALL32 */ 716 717 718 /* 719 * Bucket structures, used by lmalloc()/lfree(). 720 * See port/threads/alloc.c for details. 721 * A bucket's size and alignment is 64 bytes. 722 */ 723 typedef struct { 724 mutex_t bucket_lock; /* protects the free list allocations */ 725 void *free_list; /* LIFO list of blocks to allocate/free */ 726 size_t chunks; /* number of 64K blocks mmap()ed last time */ 727 char pad64[64 - /* pad out to 64 bytes */ 728 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 729 } bucket_t; 730 731 #ifdef _SYSCALL32 732 typedef struct { 733 mutex_t bucket_lock; 734 caddr32_t free_list; 735 size32_t chunks; 736 char pad64[64 - /* pad out to 64 bytes */ 737 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 738 } bucket32_t; 739 #endif /* _SYSCALL32 */ 740 741 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 742 743 744 /* 745 * atexit() data structures. 746 * See port/gen/atexit.c for details. 747 */ 748 typedef void (*_exithdlr_func_t) (void); 749 750 typedef struct _exthdlr { 751 struct _exthdlr *next; /* next in handler list */ 752 _exithdlr_func_t hdlr; /* handler itself */ 753 } _exthdlr_t; 754 755 typedef struct { 756 mutex_t exitfns_lock; 757 _exthdlr_t *head; 758 void *exit_frame_monitor; 759 char exit_pad[64 - /* pad out to 64 bytes */ 760 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 761 } atexit_root_t; 762 763 #ifdef _SYSCALL32 764 typedef struct { 765 mutex_t exitfns_lock; 766 caddr32_t head; 767 caddr32_t exit_frame_monitor; 768 char exit_pad[64 - /* pad out to 64 bytes */ 769 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 770 } atexit_root32_t; 771 #endif /* _SYSCALL32 */ 772 773 774 /* 775 * This is data that is global to all link maps (uberdata, aka super-global). 776 */ 777 typedef struct uberdata { 778 pad_lock_t _link_lock; 779 pad32_lock_t _fork_lock; 780 pad32_lock_t _atfork_lock; 781 pad32_lock_t _callout_lock; 782 pad32_lock_t _tdb_hash_lock; 783 tdb_sync_stats_t tdb_hash_lock_stats; 784 siguaction_t siguaction[NSIG]; 785 bucket_t bucket[NBUCKETS]; 786 atexit_root_t atexit_root; 787 tsd_metadata_t tsd_metadata; 788 tls_metadata_t tls_metadata; 789 /* 790 * Every object before this point has size and alignment of 64 bytes. 791 * Don't add any other type of data before this point. 792 */ 793 char primary_map; /* set when primary link map is initialized */ 794 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 795 char pad[2]; 796 uberflags_t uberflags; 797 queue_head_t *queue_head; 798 thr_hash_table_t *thr_hash_table; 799 uint_t hash_size; /* # of entries in thr_hash_table[] */ 800 uint_t hash_mask; /* hash_size - 1 */ 801 ulwp_t *ulwp_one; /* main thread */ 802 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 803 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 804 int nthreads; /* total number of live threads/lwps */ 805 int nzombies; /* total number of zombie threads */ 806 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 807 pid_t pid; /* the current process's pid */ 808 void (*sigacthandler)(int, siginfo_t *, void *); 809 ulwp_t *lwp_stacks; 810 ulwp_t *lwp_laststack; 811 int nfreestack; 812 int thread_stack_cache; 813 ulwp_t *ulwp_freelist; 814 ulwp_t *ulwp_lastfree; 815 ulwp_t *ulwp_replace_free; 816 ulwp_t *ulwp_replace_last; 817 atfork_t *atforklist; /* circular Q for fork handlers */ 818 robust_t **robustlocks; /* table of registered robust locks */ 819 struct uberdata **tdb_bootstrap; 820 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 821 } uberdata_t; 822 823 #define link_lock _link_lock.pad_lock 824 #define fork_lock _fork_lock.pad_lock 825 #define atfork_lock _atfork_lock.pad_lock 826 #define callout_lock _callout_lock.pad_lock 827 #define tdb_hash_lock _tdb_hash_lock.pad_lock 828 829 #pragma align 64(__uberdata) 830 extern uberdata_t __uberdata; 831 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 832 extern int primary_link_map; 833 834 #define ulwp_mutex(ulwp, udp) \ 835 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 836 #define ulwp_condvar(ulwp, udp) \ 837 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 838 839 /* 840 * Grab and release the hash table lock for the specified lwp. 841 */ 842 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 843 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 844 845 #ifdef _SYSCALL32 /* needed by libc_db */ 846 847 typedef struct ulwp32 { 848 #if defined(__sparc) 849 uint32_t ul_dinstr; /* scratch space for dtrace */ 850 uint32_t ul_padsparc0[15]; 851 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 852 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 853 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 854 uint32_t ul_dreturn; /* dtrace: return %o0 */ 855 #endif 856 caddr32_t ul_self; /* pointer to self */ 857 #if defined(__x86) 858 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 859 #endif 860 caddr32_t ul_uberdata; /* uber (super-global) data */ 861 tls32_t ul_tls; /* dynamic thread-local storage base */ 862 caddr32_t ul_forw; /* forw, back all_lwps list, */ 863 caddr32_t ul_back; /* protected by link_lock */ 864 caddr32_t ul_next; /* list to keep track of stacks */ 865 caddr32_t ul_hash; /* hash chain linked list */ 866 caddr32_t ul_rval; /* return value from thr_exit() */ 867 caddr32_t ul_stk; /* mapping base of the stack */ 868 size32_t ul_mapsiz; /* mapping size of the stack */ 869 size32_t ul_guardsize; /* normally _lpagesize */ 870 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 871 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 872 stack32_t ul_ustack; /* current stack boundaries */ 873 int ul_ix; /* hash index */ 874 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 875 pri_t ul_pri; /* priority known to the library */ 876 pri_t ul_mappedpri; /* priority known to the application */ 877 char ul_policy; /* scheduling policy */ 878 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 879 union { 880 struct { 881 char cursig; /* deferred signal number */ 882 char pleasestop; /* lwp requested to stop itself */ 883 } s; 884 short curplease; /* for testing both at once */ 885 } ul_cp; 886 char ul_stop; /* reason for stopping */ 887 char ul_signalled; /* this lwp was cond_signal()d */ 888 char ul_dead; /* this lwp has called thr_exit */ 889 char ul_unwind; /* posix: unwind C++ stack */ 890 char ul_detached; /* THR_DETACHED at thread_create() */ 891 /* or pthread_detach() was called */ 892 char ul_writer; /* sleeping in rw_wrlock() */ 893 char ul_stopping; /* set by curthread: stopping self */ 894 char ul_cancel_prologue; /* for _cancel_prologue() */ 895 short ul_preempt; /* no_preempt()/preempt() */ 896 short ul_savpreempt; /* pre-existing preempt value */ 897 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 898 char ul_main; /* thread is the main thread */ 899 char ul_fork; /* thread is performing a fork */ 900 char ul_primarymap; /* primary link-map is initialized */ 901 /* per-thread copies of the corresponding global variables */ 902 uint8_t ul_max_spinners; /* thread_max_spinners */ 903 char ul_door_noreserve; /* thread_door_noreserve */ 904 char ul_queue_fifo; /* thread_queue_fifo */ 905 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 906 char ul_error_detection; /* thread_error_detection */ 907 char ul_async_safe; /* thread_async_safe */ 908 char ul_pad1[2]; 909 int ul_adaptive_spin; /* thread_adaptive_spin */ 910 int ul_queue_spin; /* thread_queue_spin */ 911 int ul_critical; /* non-zero == in a critical region */ 912 int ul_sigdefer; /* non-zero == defer signals */ 913 int ul_vfork; /* thread is the child of vfork() */ 914 int ul_cancelable; /* _cancelon()/_canceloff() */ 915 char ul_cancel_pending; /* pthread_cancel() was called */ 916 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 917 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 918 char ul_save_async; /* saved copy of ul_cancel_async */ 919 char ul_mutator; /* lwp is a mutator (java interface) */ 920 char ul_created; /* created suspended */ 921 char ul_replace; /* replacement; must be free()d */ 922 uchar_t ul_nocancel; /* cancellation can't happen */ 923 int ul_errno; /* per-thread errno */ 924 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 925 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 926 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 927 caddr32_t ul_schedctl; /* schedctl data */ 928 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 929 int ul_pad2; 930 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 931 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 932 td_evbuf32_t ul_td_evbuf; /* event buffer */ 933 char ul_td_events_enable; /* event mechanism enabled */ 934 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 935 char ul_qtype; /* MX or CV */ 936 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 937 int ul_usropts; /* flags given to thr_create() */ 938 caddr32_t ul_startpc; /* start func (thr_create()) */ 939 caddr32_t ul_startarg; /* argument for start function */ 940 caddr32_t ul_wchan; /* synch object when sleeping */ 941 caddr32_t ul_link; /* sleep queue link */ 942 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 943 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 944 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 945 pri_t ul_epri; /* effective scheduling priority */ 946 pri_t ul_emappedpri; /* effective mapped priority */ 947 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 948 /* 0 means there is but a single entry */ 949 union { /* single entry or pointer to array */ 950 readlock32_t single; 951 caddr32_t array; 952 } ul_readlock; 953 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 954 /* 0 means there is but a single entry */ 955 union { /* single entry or pointer to array */ 956 caddr32_t single; 957 caddr32_t array; 958 } ul_heldlocks; 959 /* PROBE_SUPPORT begin */ 960 caddr32_t ul_tpdp; 961 /* PROBE_SUPPORT end */ 962 caddr32_t ul_siglink; /* pointer to previous context */ 963 uint_t ul_spin_lock_spin; /* spin lock statistics */ 964 uint_t ul_spin_lock_spin2; 965 uint_t ul_spin_lock_sleep; 966 uint_t ul_spin_lock_wakeup; 967 /* the following members *must* be last in the structure */ 968 /* they are discarded when ulwp is replaced on thr_exit() */ 969 sigset32_t ul_sigmask; /* thread's current signal mask */ 970 sigset32_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 971 siginfo32_t ul_siginfo; /* deferred siginfo */ 972 mutex_t ul_spinlock; /* used when suspending/continuing */ 973 fpuenv32_t ul_fpuenv; /* floating point state */ 974 caddr32_t ul_sp; /* stack pointer when blocked */ 975 #if defined(sparc) 976 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 977 #endif 978 } ulwp32_t; 979 980 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 981 982 typedef struct uberdata32 { 983 pad_lock_t _link_lock; 984 pad32_lock_t _fork_lock; 985 pad32_lock_t _atfork_lock; 986 pad32_lock_t _callout_lock; 987 pad32_lock_t _tdb_hash_lock; 988 tdb_sync_stats_t tdb_hash_lock_stats; 989 siguaction32_t siguaction[NSIG]; 990 bucket32_t bucket[NBUCKETS]; 991 atexit_root32_t atexit_root; 992 tsd_metadata32_t tsd_metadata; 993 tls_metadata32_t tls_metadata; 994 char primary_map; 995 char bucket_init; 996 char pad[2]; 997 uberflags_t uberflags; 998 caddr32_t queue_head; 999 caddr32_t thr_hash_table; 1000 uint_t hash_size; 1001 uint_t hash_mask; 1002 caddr32_t ulwp_one; 1003 caddr32_t all_lwps; 1004 caddr32_t all_zombies; 1005 int nthreads; 1006 int nzombies; 1007 int ndaemons; 1008 int pid; 1009 caddr32_t sigacthandler; 1010 caddr32_t lwp_stacks; 1011 caddr32_t lwp_laststack; 1012 int nfreestack; 1013 int thread_stack_cache; 1014 caddr32_t ulwp_freelist; 1015 caddr32_t ulwp_lastfree; 1016 caddr32_t ulwp_replace_free; 1017 caddr32_t ulwp_replace_last; 1018 caddr32_t atforklist; 1019 caddr32_t robustlocks; 1020 caddr32_t tdb_bootstrap; 1021 tdb32_t tdb; 1022 } uberdata32_t; 1023 1024 #endif /* _SYSCALL32 */ 1025 1026 /* ul_stop values */ 1027 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1028 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1029 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1030 1031 /* 1032 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1033 */ 1034 1035 typedef struct _cvattr { 1036 int pshared; 1037 clockid_t clockid; 1038 } cvattr_t; 1039 1040 typedef struct _mattr { 1041 int pshared; 1042 int protocol; 1043 int prioceiling; 1044 int type; 1045 int robustness; 1046 } mattr_t; 1047 1048 typedef struct _thrattr { 1049 size_t stksize; 1050 void *stkaddr; 1051 int detachstate; 1052 int daemonstate; 1053 int scope; 1054 int prio; 1055 int policy; 1056 int inherit; 1057 size_t guardsize; 1058 } thrattr_t; 1059 1060 typedef struct _rwlattr { 1061 int pshared; 1062 } rwlattr_t; 1063 1064 /* _curthread() is inline for speed */ 1065 extern ulwp_t *_curthread(void); 1066 #define curthread (_curthread()) 1067 1068 /* this version (also inline) can be tested for NULL */ 1069 extern ulwp_t *__curthread(void); 1070 1071 /* get the current stack pointer (also inline) */ 1072 extern greg_t stkptr(void); 1073 1074 /* 1075 * Suppress __attribute__((...)) if we are not compiling with gcc 1076 */ 1077 #if !defined(__GNUC__) 1078 #define __attribute__(string) 1079 #endif 1080 1081 /* 1082 * Implementation functions. Not visible outside of the library itself. 1083 */ 1084 extern int __nanosleep(const timespec_t *, timespec_t *); 1085 extern void getgregs(ulwp_t *, gregset_t); 1086 extern void setgregs(ulwp_t *, gregset_t); 1087 extern void thr_panic(const char *); 1088 #pragma rarely_called(thr_panic) 1089 extern ulwp_t *find_lwp(thread_t); 1090 extern int real_priority(ulwp_t *); 1091 extern void finish_init(void); 1092 extern void queue_alloc(void); 1093 extern void tsd_exit(void); 1094 extern void tsd_free(ulwp_t *); 1095 extern void tls_setup(void); 1096 extern void tls_exit(void); 1097 extern void tls_free(ulwp_t *); 1098 extern void rwl_free(ulwp_t *); 1099 extern void heldlock_exit(void); 1100 extern void heldlock_free(ulwp_t *); 1101 extern void sigacthandler(int, siginfo_t *, void *); 1102 extern void signal_init(void); 1103 extern int sigequalset(const sigset_t *, const sigset_t *); 1104 extern void mutex_setup(void); 1105 extern void take_deferred_signal(int); 1106 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1107 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1108 extern volatile sc_shared_t *setup_schedctl(void); 1109 extern void *lmalloc(size_t); 1110 extern void lfree(void *, size_t); 1111 extern void *libc_malloc(size_t); 1112 extern void *libc_realloc(void *, size_t); 1113 extern void libc_free(void *); 1114 extern char *libc_strdup(const char *); 1115 extern void ultos(uint64_t, int, char *); 1116 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1117 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1118 extern void thread_error(const char *); 1119 extern void grab_assert_lock(void); 1120 extern void dump_queue_statistics(void); 1121 extern void collect_queue_statistics(void); 1122 extern void record_spin_locks(ulwp_t *); 1123 extern void remember_lock(mutex_t *); 1124 extern void forget_lock(mutex_t *); 1125 extern void register_lock(mutex_t *); 1126 extern void unregister_locks(void); 1127 #if defined(__sparc) 1128 extern void _flush_windows(void); 1129 #else 1130 #define _flush_windows() 1131 #endif 1132 extern void set_curthread(void *); 1133 1134 /* 1135 * Utility function used when waking up many threads (more than MAXLWPS) 1136 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1137 */ 1138 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1139 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1140 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1141 1142 /* enter a critical section */ 1143 #define enter_critical(self) (self->ul_critical++) 1144 1145 /* exit a critical section, take deferred actions if necessary */ 1146 extern void do_exit_critical(void); 1147 #define exit_critical(self) \ 1148 (void) (self->ul_critical--, \ 1149 ((self->ul_curplease && self->ul_critical == 0)? \ 1150 (do_exit_critical(), 0) : 0)) 1151 1152 /* 1153 * Like enter_critical()/exit_critical() but just for deferring signals. 1154 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1155 * calling application functions like constructors and destructors. 1156 * Care must be taken if the application function attempts to set 1157 * the signal mask while a deferred signal is present; the setting 1158 * of the signal mask must also be deferred. 1159 */ 1160 #define sigoff(self) (self->ul_sigdefer++) 1161 extern void sigon(ulwp_t *); 1162 1163 /* these are exported functions */ 1164 extern void _sigoff(void); 1165 extern void _sigon(void); 1166 1167 #define sigorset(s1, s2) \ 1168 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1169 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1170 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1171 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1172 1173 #define sigandset(s1, s2) \ 1174 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1175 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1176 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1177 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1178 1179 #define sigdiffset(s1, s2) \ 1180 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1181 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1182 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1183 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1184 1185 #define delete_reserved_signals(s) \ 1186 (((s)->__sigbits[0] &= MASKSET0), \ 1187 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1188 ((s)->__sigbits[2] = 0), \ 1189 ((s)->__sigbits[3] = 0)) 1190 1191 extern void block_all_signals(ulwp_t *self); 1192 1193 /* 1194 * When restoring the signal mask after having previously called 1195 * block_all_signals(), if we have a deferred signal present then 1196 * do nothing other than ASSERT() that we are in a critical region. 1197 * The signal mask will be set when we emerge from the critical region 1198 * and call take_deferred_signal(). There is no race condition here 1199 * because the kernel currently has all signals blocked for this thread. 1200 */ 1201 #define restore_signals(self) \ 1202 ((void) ((self)->ul_cursig? \ 1203 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1204 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask, NULL))) 1205 1206 extern void set_parking_flag(ulwp_t *, int); 1207 1208 extern void *_thr_setup(ulwp_t *); 1209 extern void _fpinherit(ulwp_t *); 1210 extern void _lwp_start(void); 1211 extern void _lwp_terminate(void); 1212 extern void lmutex_lock(mutex_t *); 1213 extern void lmutex_unlock(mutex_t *); 1214 extern void lrw_rdlock(rwlock_t *); 1215 extern void lrw_wrlock(rwlock_t *); 1216 extern void lrw_unlock(rwlock_t *); 1217 extern void sig_mutex_lock(mutex_t *); 1218 extern void sig_mutex_unlock(mutex_t *); 1219 extern int sig_mutex_trylock(mutex_t *); 1220 extern int sig_cond_wait(cond_t *, mutex_t *); 1221 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1222 extern void _prefork_handler(void); 1223 extern void _postfork_parent_handler(void); 1224 extern void _postfork_child_handler(void); 1225 extern void postfork1_child(void); 1226 extern void postfork1_child_aio(void); 1227 extern void postfork1_child_sigev_aio(void); 1228 extern void postfork1_child_sigev_mq(void); 1229 extern void postfork1_child_sigev_timer(void); 1230 extern void postfork1_child_tpool(void); 1231 extern void fork_lock_enter(void); 1232 extern void fork_lock_exit(void); 1233 extern void suspend_fork(void); 1234 extern void continue_fork(int); 1235 extern void do_sigcancel(void); 1236 extern void setup_cancelsig(int); 1237 extern void init_sigev_thread(void); 1238 extern void init_aio(void); 1239 extern void _cancelon(void); 1240 extern void _canceloff(void); 1241 extern void _canceloff_nocancel(void); 1242 extern void _cancel_prologue(void); 1243 extern void _cancel_epilogue(void); 1244 extern void no_preempt(ulwp_t *); 1245 extern void preempt(ulwp_t *); 1246 extern void _thrp_unwind(void *); 1247 1248 /* 1249 * Prototypes for the strong versions of the interface functions 1250 */ 1251 extern pid_t __forkx(int); 1252 extern pid_t __forkallx(int); 1253 extern pid_t _private_getpid(void); 1254 extern uid_t _private_geteuid(void); 1255 extern int _kill(pid_t, int); 1256 extern int _open(const char *, int, ...); 1257 extern int _close(int); 1258 extern ssize_t _read(int, void *, size_t); 1259 extern ssize_t _write(int, const void *, size_t); 1260 extern void *_memcpy(void *, const void *, size_t); 1261 extern void *_memset(void *, int, size_t); 1262 extern int _memcmp(const void *, const void *, size_t); 1263 extern void *_private_memcpy(void *, const void *, size_t); 1264 extern void *_private_memset(void *, int, size_t); 1265 extern int _private_sigfillset(sigset_t *); 1266 extern int _private_sigemptyset(sigset_t *); 1267 extern int _private_sigaddset(sigset_t *, int); 1268 extern int _private_sigdelset(sigset_t *, int); 1269 extern int _private_sigismember(sigset_t *, int); 1270 extern void *_private_mmap(void *, size_t, int, int, int, off_t); 1271 extern int _private_mprotect(void *, size_t, int); 1272 extern int _private_munmap(void *, size_t); 1273 extern int _private_getrlimit(int, struct rlimit *); 1274 extern int __lwp_continue(lwpid_t); 1275 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1276 extern int __lwp_kill(lwpid_t, int); 1277 extern lwpid_t __lwp_self(void); 1278 extern int ___lwp_suspend(lwpid_t); 1279 extern void lwp_yield(void); 1280 extern int lwp_wait(lwpid_t, lwpid_t *); 1281 extern int __lwp_wait(lwpid_t, lwpid_t *); 1282 extern int __lwp_detach(lwpid_t); 1283 extern sc_shared_t *__schedctl(void); 1284 1285 extern int _private_setcontext(const ucontext_t *); 1286 extern int _private_getcontext(ucontext_t *); 1287 #pragma unknown_control_flow(_private_getcontext) 1288 /* actual system call traps */ 1289 extern int __setcontext_syscall(const ucontext_t *); 1290 extern int __getcontext_syscall(ucontext_t *); 1291 extern int _private_setustack(stack_t *); 1292 extern int __clock_gettime(clockid_t, timespec_t *); 1293 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1294 extern void hrt2ts(hrtime_t, timespec_t *); 1295 1296 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1297 extern int __lwp_sigmask(int, const sigset_t *, sigset_t *); 1298 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1299 extern caddr_t __sighndlrend; 1300 #pragma unknown_control_flow(__sighndlr) 1301 extern void _siglongjmp(sigjmp_buf, int); 1302 1303 extern int _pthread_setspecific(pthread_key_t, const void *); 1304 extern void *_pthread_getspecific(pthread_key_t); 1305 extern void _pthread_exit(void *); 1306 extern void _private_testcancel(void); 1307 1308 /* belongs in <pthread.h> */ 1309 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1310 #define PTHREAD_CREATE_NONDAEMON_NP 0 1311 extern int _pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1312 extern int _pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1313 1314 /* these are private to the library */ 1315 extern int _private_mutex_init(mutex_t *, int, void *); 1316 extern int _private_mutex_destroy(mutex_t *); 1317 extern int _private_mutex_lock(mutex_t *); 1318 extern int _private_mutex_trylock(mutex_t *); 1319 extern int _private_mutex_unlock(mutex_t *); 1320 1321 extern int _mutex_init(mutex_t *, int, void *); 1322 extern int _mutex_destroy(mutex_t *); 1323 extern int _mutex_consistent(mutex_t *); 1324 extern int _mutex_lock(mutex_t *); 1325 extern int _mutex_trylock(mutex_t *); 1326 extern int _mutex_unlock(mutex_t *); 1327 extern int __mutex_init(mutex_t *, int, void *); 1328 extern int __mutex_destroy(mutex_t *); 1329 extern int __mutex_consistent(mutex_t *); 1330 extern int __mutex_lock(mutex_t *); 1331 extern int __mutex_trylock(mutex_t *); 1332 extern int __mutex_unlock(mutex_t *); 1333 extern int mutex_is_held(mutex_t *); 1334 1335 extern int _cond_init(cond_t *, int, void *); 1336 extern int _cond_wait(cond_t *, mutex_t *); 1337 extern int _cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1338 extern int _cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1339 extern int _cond_signal(cond_t *); 1340 extern int _cond_broadcast(cond_t *); 1341 extern int _cond_destroy(cond_t *); 1342 extern int cond_signal_internal(cond_t *); 1343 extern int cond_broadcast_internal(cond_t *); 1344 1345 extern int __rwlock_init(rwlock_t *, int, void *); 1346 extern int rw_read_is_held(rwlock_t *); 1347 extern int rw_write_is_held(rwlock_t *); 1348 1349 extern void _membar_enter(void); 1350 extern void _membar_exit(void); 1351 extern void _membar_producer(void); 1352 extern void _membar_consumer(void); 1353 1354 extern int _thr_continue(thread_t); 1355 extern int _thr_create(void *, size_t, void *(*)(void *), void *, long, 1356 thread_t *); 1357 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1358 thread_t *, pri_t, int, size_t); 1359 extern int _thr_getprio(thread_t, int *); 1360 extern int _thr_getspecific(thread_key_t, void **); 1361 extern int _thr_join(thread_t, thread_t *, void **); 1362 extern int _thr_keycreate(thread_key_t *, PFrV); 1363 extern int _thr_keycreate_once(thread_key_t *, PFrV); 1364 extern int _thr_key_delete(thread_key_t); 1365 extern int _thr_main(void); 1366 extern thread_t _thr_self(void); 1367 extern int _thr_getconcurrency(void); 1368 extern int _thr_setconcurrency(int); 1369 extern int _thr_setprio(thread_t, int); 1370 extern int _thr_setspecific(thread_key_t, void *); 1371 extern int _thr_stksegment(stack_t *); 1372 extern int _thrp_suspend(thread_t, uchar_t); 1373 extern int _thrp_continue(thread_t, uchar_t); 1374 extern int _thr_sigsetmask(int, const sigset_t *, sigset_t *); 1375 1376 extern void _thr_terminate(void *); 1377 extern void _thr_exit(void *); 1378 extern void _thrp_exit(void); 1379 1380 extern const thrattr_t *def_thrattr(void); 1381 extern int _thread_setschedparam_main(pthread_t, int, 1382 const struct sched_param *, int); 1383 extern int _validate_rt_prio(int, int); 1384 extern int _thrp_setlwpprio(lwpid_t, int, int); 1385 extern pri_t map_rtpri_to_gp(pri_t); 1386 extern int get_info_by_policy(int); 1387 1388 /* 1389 * System call wrappers (direct interfaces to the kernel) 1390 */ 1391 extern int ___lwp_mutex_register(mutex_t *); 1392 extern int ___lwp_mutex_trylock(mutex_t *); 1393 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *); 1394 extern int ___lwp_mutex_unlock(mutex_t *); 1395 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1396 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1397 extern int __lwp_cond_signal(lwp_cond_t *); 1398 extern int __lwp_cond_broadcast(lwp_cond_t *); 1399 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1400 extern int __lwp_sema_trywait(lwp_sema_t *); 1401 extern int __lwp_sema_post(lwp_sema_t *); 1402 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1403 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1404 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1405 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1406 extern int __lwp_rwlock_unlock(rwlock_t *); 1407 extern int __lwp_park(timespec_t *, lwpid_t); 1408 extern int __lwp_unpark(lwpid_t); 1409 extern int __lwp_unpark_all(lwpid_t *, int); 1410 #if defined(__x86) 1411 extern int ___lwp_private(int, int, void *); 1412 #endif /* __x86 */ 1413 1414 extern int _private_lwp_mutex_lock(mutex_t *); 1415 extern int _private_lwp_mutex_unlock(mutex_t *); 1416 1417 /* 1418 * inlines 1419 */ 1420 extern int set_lock_byte(volatile uint8_t *); 1421 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1422 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1423 extern void atomic_inc_32(volatile uint32_t *); 1424 extern void atomic_dec_32(volatile uint32_t *); 1425 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1426 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1427 #if defined(__sparc) 1428 extern ulong_t caller(void); 1429 extern ulong_t getfp(void); 1430 #endif /* __sparc */ 1431 1432 #include "thr_inlines.h" 1433 1434 #endif /* _THR_UBERDATA_H */ 1435