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 WAITER 0x00000001 109 #define LOCKSET 0xff 110 #define LOCKCLEAR 0 111 #elif defined(__x86) 112 /* lock.lock64.pad[x] 7 6 5 4 */ 113 #define LOCKMASK 0xff000000 114 #define WAITERMASK 0x00ff0000 115 #define WAITER 0x00010000 116 #define LOCKSET 0x01 117 #define LOCKCLEAR 0 118 #else 119 #error "neither __sparc nor __x86 is defined" 120 #endif 121 122 /* 123 * Fetch the owner of a USYNC_THREAD mutex. 124 * Don't use this with process-shared mutexes; 125 * the owing thread may be in a different process. 126 */ 127 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 128 129 /* 130 * Test if a thread owns a process-private (USYNC_THREAD) mutex. 131 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex. 132 * The 'mp' argument must not have side-effects since it is evaluated twice. 133 */ 134 #define MUTEX_OWNED(mp, thrp) \ 135 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 136 137 138 /* 139 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 140 * collection of lock statistics by a debugger or other collecting tool. 141 * 142 * uberflags.uf_thread_error_detection is set by an environment variable: 143 * _THREAD_ERROR_DETECTION 144 * 0 == no detection of locking primitive errors. 145 * 1 == detect errors and issue a warning message. 146 * 2 == detect errors, issue a warning message, and dump core. 147 * 148 * We bundle these together in uberflags.uf_trs_ted to make a test of either 149 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 150 * 151 * uberflags.uf_mt is set non-zero when the first thread (in addition 152 * to the main thread) is created. 153 * 154 * We bundle all these flags together in uberflags.uf_all to make a test 155 * of any being non-zero a single memory reference (again, for speed). 156 */ 157 typedef union { 158 int uf_all; /* combined all flags */ 159 struct { 160 short h_pad; 161 short h_trs_ted; /* combined reg sync & error detect */ 162 } uf_h; 163 struct { 164 char x_mt; 165 char x_pad; 166 char x_tdb_register_sync; 167 char x_thread_error_detection; 168 } uf_x; 169 } uberflags_t; 170 171 #define uf_mt uf_x.x_mt 172 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 173 #define uf_thread_error_detection uf_x.x_thread_error_detection 174 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 175 176 /* 177 * NOTE WELL: 178 * To enable further optimization, the "ul_schedctl_called" member 179 * of the ulwp_t structure (below) serves double-duty: 180 * 1. If NULL, it means that the thread must call __schedctl() 181 * to set up its schedctl mappings before acquiring a mutex. 182 * This is required by the implementation of adaptive mutex locking. 183 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 184 * uberflags can be made without additional memory references. 185 * This allows the common case of _mutex_lock() and _mutex_unlock() for 186 * USYNC_THREAD mutexes with no error detection and no lock statistics 187 * to be optimized for speed. 188 */ 189 190 191 /* double the default stack size for 64-bit processes */ 192 #ifdef _LP64 193 #define MINSTACK (8 * 1024) 194 #define DEFAULTSTACK (2 * 1024 * 1024) 195 #else 196 #define MINSTACK (4 * 1024) 197 #define DEFAULTSTACK (1024 * 1024) 198 #endif 199 #define TSD_NKEYS _POSIX_THREAD_KEYS_MAX 200 201 #define THREAD_MIN_PRIORITY 0 202 #define THREAD_MAX_PRIORITY 127 203 204 #define PRIO_SET 0 /* set priority and policy */ 205 #define PRIO_SET_PRIO 1 /* set priority only */ 206 #define PRIO_INHERIT 2 207 #define PRIO_DISINHERIT 3 208 209 #define MUTEX_TRY 0 210 #define MUTEX_LOCK 1 211 212 #if defined(__x86) 213 214 typedef struct { /* structure returned by fnstenv */ 215 int fctrl; /* control word */ 216 int fstat; /* status word (flags, etc) */ 217 int ftag; /* tag of which regs busy */ 218 int misc[4]; /* other stuff, 28 bytes total */ 219 } fpuenv_t; 220 221 #ifdef _SYSCALL32 222 typedef fpuenv_t fpuenv32_t; 223 #endif /* _SYSCALL32 */ 224 225 #elif defined(__sparc) 226 227 typedef struct { /* fp state structure */ 228 greg_t fsr; 229 greg_t fpu_en; 230 } fpuenv_t; 231 232 #ifdef _SYSCALL32 233 typedef struct { 234 greg32_t fsr; 235 greg32_t fpu_en; 236 } fpuenv32_t; 237 #endif /* _SYSCALL32 */ 238 239 #endif /* __x86 */ 240 241 #if defined(__x86) 242 extern void ht_pause(void); /* "pause" instruction */ 243 #define SMT_PAUSE() ht_pause() 244 #else 245 #define SMT_PAUSE() 246 #endif /* __x86 */ 247 248 /* 249 * Cleanup handler related data. 250 * This structure is exported as _cleanup_t in pthread.h. 251 * pthread.h exports only the size of this structure, so check 252 * _cleanup_t in pthread.h before making any change here. 253 */ 254 typedef struct __cleanup { 255 struct __cleanup *next; /* pointer to next handler */ 256 caddr_t fp; /* current frame pointer */ 257 void (*func)(void *); /* cleanup handler address */ 258 void *arg; /* handler's argument */ 259 } __cleanup_t; 260 261 /* 262 * Thread-Specific Data (TSD) 263 * TSD_NFAST includes the invalid key zero, so there 264 * are really only (TSD_NFAST - 1) fast key slots. 265 */ 266 typedef void (*PFrV)(void *); 267 #define TSD_UNALLOCATED ((PFrV)1) 268 #define TSD_NFAST 9 269 270 /* 271 * The tsd union is designed to burn a little memory (9 words) to make 272 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 273 * end of the pad region to increase the likelihood that it falls on the 274 * same cache line as the data. 275 */ 276 typedef union tsd { 277 uint_t tsd_nalloc; /* Amount of allocated storage */ 278 void *tsd_pad[TSD_NFAST]; 279 void *tsd_data[1]; 280 } tsd_t; 281 282 typedef struct { 283 mutex_t tsdm_lock; /* Lock protecting the data */ 284 uint_t tsdm_nkeys; /* Number of allocated keys */ 285 uint_t tsdm_nused; /* Number of used keys */ 286 PFrV *tsdm_destro; /* Per-key destructors */ 287 char tsdm_pad[64 - /* pad to 64 bytes */ 288 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 289 } tsd_metadata_t; 290 291 #ifdef _SYSCALL32 292 typedef union tsd32 { 293 uint_t tsd_nalloc; /* Amount of allocated storage */ 294 caddr32_t tsd_pad[TSD_NFAST]; 295 caddr32_t tsd_data[1]; 296 } tsd32_t; 297 298 typedef struct { 299 mutex_t tsdm_lock; /* Lock protecting the data */ 300 uint_t tsdm_nkeys; /* Number of allocated keys */ 301 uint_t tsdm_nused; /* Number of used keys */ 302 caddr32_t tsdm_destro; /* Per-key destructors */ 303 char tsdm_pad[64 - /* pad to 64 bytes */ 304 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 305 } tsd_metadata32_t; 306 #endif /* _SYSCALL32 */ 307 308 309 /* 310 * Thread-Local Storage (TLS) 311 */ 312 typedef struct { 313 void *tls_data; 314 size_t tls_size; 315 } tls_t; 316 317 typedef struct { 318 mutex_t tls_lock; /* Lock protecting the data */ 319 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 320 tls_t static_tls; /* Template for static TLS */ 321 char tls_pad[64 - /* pad to 64 bytes */ 322 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 323 } tls_metadata_t; 324 325 #ifdef _SYSCALL32 326 typedef struct { 327 caddr32_t tls_data; 328 size32_t tls_size; 329 } tls32_t; 330 331 typedef struct { 332 mutex_t tls_lock; /* Lock protecting the data */ 333 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 334 tls32_t static_tls; /* Template for static TLS */ 335 char tls_pad[64 - /* pad to 64 bytes */ 336 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 337 } tls_metadata32_t; 338 #endif /* _SYSCALL32 */ 339 340 341 /* 342 * Sleep queues for USYNC_THREAD condvars and mutexes. 343 * The size and alignment is 64 bytes to reduce cache conflicts. 344 */ 345 typedef union { 346 uint64_t qh_64[8]; 347 struct { 348 mutex_t q_lock; 349 uint8_t q_qcnt; 350 uint8_t q_pad[7]; 351 uint64_t q_lockcount; 352 uint32_t q_qlen; 353 uint32_t q_qmax; 354 struct ulwp *q_head; 355 struct ulwp *q_tail; 356 } qh_qh; 357 } queue_head_t; 358 359 #define qh_lock qh_qh.q_lock 360 #define qh_qcnt qh_qh.q_qcnt 361 #define qh_lockcount qh_qh.q_lockcount 362 #define qh_qlen qh_qh.q_qlen 363 #define qh_qmax qh_qh.q_qmax 364 #define qh_head qh_qh.q_head 365 #define qh_tail qh_qh.q_tail 366 367 /* queue types passed to queue_lock() and enqueue() */ 368 #define MX 0 369 #define CV 1 370 #define FIFOQ 0x10 /* or'ing with FIFOQ asks for FIFO queueing */ 371 #define QHASHSHIFT 9 /* number of hashing bits */ 372 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */ 373 #define QUEUE_HASH(wchan, type) ((uint_t) \ 374 ((((uintptr_t)(wchan) >> 3) \ 375 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \ 376 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 377 378 extern queue_head_t *queue_lock(void *, int); 379 extern void queue_unlock(queue_head_t *); 380 extern void enqueue(queue_head_t *, struct ulwp *, void *, int); 381 extern struct ulwp *dequeue(queue_head_t *, void *, int *); 382 extern struct ulwp *queue_waiter(queue_head_t *, void *); 383 extern struct ulwp *queue_unlink(queue_head_t *, 384 struct ulwp **, struct ulwp *); 385 extern uint8_t dequeue_self(queue_head_t *, void *); 386 extern void unsleep_self(void); 387 extern void spin_lock_set(mutex_t *); 388 extern void spin_lock_clear(mutex_t *); 389 390 /* 391 * Memory block for chain of owned ceiling mutexes. 392 */ 393 typedef struct mxchain { 394 struct mxchain *mxchain_next; 395 mutex_t *mxchain_mx; 396 } mxchain_t; 397 398 /* 399 * Pointer to an rwlock that is held for reading. 400 * Used in rw_rdlock() to allow a thread that already holds a read 401 * lock to acquire another read lock on the same rwlock even if 402 * there are writers waiting. This to avoid deadlock when acquiring 403 * a read lock more than once in the presence of pending writers. 404 * POSIX mandates this behavior. 405 */ 406 typedef struct { 407 void *rd_rwlock; /* the rwlock held for reading */ 408 size_t rd_count; /* count of read locks applied */ 409 } readlock_t; 410 411 #ifdef _SYSCALL32 412 typedef struct { 413 caddr32_t rd_rwlock; 414 size32_t rd_count; 415 } readlock32_t; 416 #endif /* _SYSCALL32 */ 417 418 /* 419 * Maximum number of read locks allowed for one thread on one rwlock. 420 * This could be as large as INT_MAX, but the SUSV3 test suite would 421 * take an inordinately long time to complete. This is big enough. 422 */ 423 #define READ_LOCK_MAX 100000 424 425 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 426 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 427 428 /* 429 * Round up an integral value to a multiple of 64 430 */ 431 #define roundup64(x) (-(-(x) & -64)) 432 433 /* 434 * NOTE: Whatever changes are made to ulwp_t must be 435 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 436 * 437 * NOTE: ul_self *must* be the first member of ulwp_t on x86 438 * Low-level x86 code relies on this. 439 */ 440 typedef struct ulwp { 441 /* 442 * These members always need to come first on sparc. 443 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 444 */ 445 #if defined(__sparc) 446 uint32_t ul_dinstr; /* scratch space for dtrace */ 447 uint32_t ul_padsparc0[15]; 448 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 449 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 450 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 451 uint32_t ul_dreturn; /* dtrace: return %o0 */ 452 #endif 453 struct ulwp *ul_self; /* pointer to self */ 454 #if defined(__i386) 455 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 456 #elif defined(__amd64) 457 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 458 #endif 459 struct uberdata *ul_uberdata; /* uber (super-global) data */ 460 tls_t ul_tls; /* dynamic thread-local storage base */ 461 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 462 struct ulwp *ul_back; /* protected by link_lock */ 463 struct ulwp *ul_next; /* list to keep track of stacks */ 464 struct ulwp *ul_hash; /* hash chain linked list */ 465 void *ul_rval; /* return value from thr_exit() */ 466 caddr_t ul_stk; /* mapping base of the stack */ 467 size_t ul_mapsiz; /* mapping size of the stack */ 468 size_t ul_guardsize; /* normally _lpagesize */ 469 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 470 size_t ul_stksiz; /* broken thr_stksegment() interface */ 471 stack_t ul_ustack; /* current stack boundaries */ 472 int ul_ix; /* hash index */ 473 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 474 pri_t ul_pri; /* priority known to the library */ 475 pri_t ul_mappedpri; /* priority known to the application */ 476 char ul_policy; /* scheduling policy */ 477 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 478 union { 479 struct { 480 char cursig; /* deferred signal number */ 481 char pleasestop; /* lwp requested to stop itself */ 482 } s; 483 short curplease; /* for testing both at once */ 484 } ul_cp; 485 char ul_stop; /* reason for stopping */ 486 char ul_signalled; /* this lwp was cond_signal()d */ 487 char ul_dead; /* this lwp has called thr_exit */ 488 char ul_unwind; /* posix: unwind C++ stack */ 489 char ul_detached; /* THR_DETACHED at thread_create() */ 490 /* or pthread_detach() was called */ 491 char ul_writer; /* sleeping in rw_wrlock() */ 492 char ul_stopping; /* set by curthread: stopping self */ 493 char ul_cancel_prologue; /* for _cancel_prologue() */ 494 short ul_preempt; /* no_preempt()/preempt() */ 495 short ul_savpreempt; /* pre-existing preempt value */ 496 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 497 char ul_main; /* thread is the main thread */ 498 char ul_fork; /* thread is performing a fork */ 499 char ul_primarymap; /* primary link-map is initialized */ 500 /* per-thread copies of the corresponding global variables */ 501 uchar_t ul_max_spinners; /* thread_max_spinners */ 502 char ul_door_noreserve; /* thread_door_noreserve */ 503 char ul_queue_fifo; /* thread_queue_fifo */ 504 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 505 char ul_error_detection; /* thread_error_detection */ 506 char ul_async_safe; /* thread_async_safe */ 507 char ul_pad1[2]; 508 int ul_adaptive_spin; /* thread_adaptive_spin */ 509 int ul_release_spin; /* thread_release_spin */ 510 int ul_queue_spin; /* thread_queue_spin */ 511 volatile int ul_critical; /* non-zero == in a critical region */ 512 int ul_sigdefer; /* non-zero == defer signals */ 513 int ul_vfork; /* thread is the child of vfork() */ 514 int ul_cancelable; /* _cancelon()/_canceloff() */ 515 char ul_cancel_pending; /* pthread_cancel() was called */ 516 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 517 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 518 char ul_save_async; /* saved copy of ul_cancel_async */ 519 char ul_mutator; /* lwp is a mutator (java interface) */ 520 char ul_created; /* created suspended */ 521 char ul_replace; /* replacement; must be free()d */ 522 uchar_t ul_nocancel; /* cancellation can't happen */ 523 int ul_errno; /* per-thread errno */ 524 int *ul_errnop; /* pointer to errno or self->ul_errno */ 525 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 526 uberflags_t *volatile ul_schedctl_called; /* ul_schedctl is set up */ 527 volatile sc_shared_t *volatile ul_schedctl; /* schedctl data */ 528 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 529 int ul_pad2; 530 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 531 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 532 td_evbuf_t ul_td_evbuf; /* event buffer */ 533 char ul_td_events_enable; /* event mechanism enabled */ 534 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 535 char ul_qtype; /* MX or CV */ 536 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 537 int ul_usropts; /* flags given to thr_create() */ 538 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 539 void *ul_startarg; /* argument for start function */ 540 void *ul_wchan; /* synch object when sleeping */ 541 struct ulwp *ul_link; /* sleep queue link */ 542 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 543 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 544 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 545 pri_t ul_epri; /* effective scheduling priority */ 546 pri_t ul_emappedpri; /* effective mapped priority */ 547 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 548 /* 0 means there is but a single entry */ 549 union { /* single entry or pointer to array */ 550 readlock_t single; 551 readlock_t *array; 552 } ul_readlock; 553 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 554 /* 0 means there is but a single entry */ 555 union { /* single entry or pointer to array */ 556 mutex_t *single; 557 mutex_t **array; 558 } ul_heldlocks; 559 /* PROBE_SUPPORT begin */ 560 void *ul_tpdp; 561 /* PROBE_SUPPORT end */ 562 ucontext_t *ul_siglink; /* pointer to previous context */ 563 uint_t ul_spin_lock_spin; /* spin lock statistics */ 564 uint_t ul_spin_lock_spin2; 565 uint_t ul_spin_lock_sleep; 566 uint_t ul_spin_lock_wakeup; 567 /* the following members *must* be last in the structure */ 568 /* they are discarded when ulwp is replaced on thr_exit() */ 569 sigset_t ul_sigmask; /* thread's current signal mask */ 570 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 571 siginfo_t ul_siginfo; /* deferred siginfo */ 572 mutex_t ul_spinlock; /* used when suspending/continuing */ 573 fpuenv_t ul_fpuenv; /* floating point state */ 574 uintptr_t ul_sp; /* stack pointer when blocked */ 575 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 576 #if defined(sparc) 577 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 578 #endif 579 } ulwp_t; 580 581 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 582 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 583 #define ul_curplease ul_cp.curplease /* for testing both at once */ 584 585 /* 586 * This is the size of a replacement ulwp, retained only for the benefit 587 * of thr_join(). The trailing members are unneeded for this purpose. 588 */ 589 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 590 591 /* 592 * Definitions for static initialization of signal sets, 593 * plus some sneaky optimizations in various places. 594 */ 595 596 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 597 598 #if (MAXSIG > 32 && MAXSIG <= 64) 599 #define FILLSET0 0xffffffffu 600 #define FILLSET1 ((1u << (MAXSIG - 32)) - 1) 601 #else 602 #error "fix me: MAXSIG out of bounds" 603 #endif 604 605 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 606 #define CANTMASK1 0 607 608 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 609 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 610 611 extern const sigset_t maskset; /* set of all maskable signals */ 612 613 extern int thread_adaptive_spin; 614 extern uint_t thread_max_spinners; 615 extern int thread_release_spin; 616 extern int thread_queue_spin; 617 extern int thread_queue_fifo; 618 extern int thread_queue_dump; 619 extern int thread_cond_wait_defer; 620 extern int thread_async_safe; 621 extern int thread_queue_verify; 622 623 /* 624 * pthread_atfork() related data, used to store atfork handlers. 625 */ 626 typedef struct atfork { 627 struct atfork *forw; /* forward pointer */ 628 struct atfork *back; /* backward pointer */ 629 void (*prepare)(void); /* pre-fork handler */ 630 void (*parent)(void); /* post-fork parent handler */ 631 void (*child)(void); /* post-fork child handler */ 632 } atfork_t; 633 634 /* 635 * Element in the table of registered process robust locks. 636 * We keep track of these to make sure that we only call 637 * ___lwp_mutex_register() once for each such lock. 638 */ 639 typedef struct robust { 640 struct robust *robust_next; 641 mutex_t *robust_lock; 642 } robust_t; 643 644 /* 645 * Parameters of the lock registration hash table. 646 */ 647 #define LOCKSHIFT 9 /* number of hashing bits */ 648 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<9 == 512) */ 649 #define LOCK_HASH(addr) (uint_t) \ 650 ((((uintptr_t)(addr) >> 3) \ 651 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 652 & (LOCKHASHSZ - 1)) 653 654 /* 655 * Make our hot locks reside on private cache lines (64 bytes). 656 */ 657 typedef struct { 658 mutex_t pad_lock; 659 char pad_pad[64 - sizeof (mutex_t)]; 660 } pad_lock_t; 661 662 /* 663 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 664 */ 665 typedef struct { 666 mutex_t pad_lock; 667 char pad_pad[32 - sizeof (mutex_t)]; 668 } pad32_lock_t; 669 670 /* 671 * The threads hash table is used for fast lookup and locking of an active 672 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 673 * thr_hash_table_t structures, where N == 1 before the main thread creates 674 * the first additional thread and N == 1024 afterwards. Each element of the 675 * table is 64 bytes in size and alignment to reduce cache conflicts. 676 */ 677 typedef struct { 678 mutex_t hash_lock; /* lock per bucket */ 679 cond_t hash_cond; /* convar per bucket */ 680 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 681 char hash_pad[64 - /* pad out to 64 bytes */ 682 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 683 } thr_hash_table_t; 684 685 #ifdef _SYSCALL32 686 typedef struct { 687 mutex_t hash_lock; 688 cond_t hash_cond; 689 caddr32_t hash_bucket; 690 char hash_pad[64 - 691 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 692 } thr_hash_table32_t; 693 #endif /* _SYSCALL32 */ 694 695 696 /* 697 * siguaction members have 128-byte size and 64-byte alignment. 698 * We know that sizeof (struct sigaction) is 32 bytes for both 699 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 700 */ 701 typedef struct { 702 rwlock_t sig_lock; 703 struct sigaction sig_uaction; 704 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 705 } siguaction_t; 706 707 #ifdef _SYSCALL32 708 typedef struct { 709 rwlock_t sig_lock; 710 struct sigaction32 sig_uaction; 711 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 712 } siguaction32_t; 713 #endif /* _SYSCALL32 */ 714 715 716 /* 717 * Bucket structures, used by lmalloc()/lfree(). 718 * See port/threads/alloc.c for details. 719 * A bucket's size and alignment is 64 bytes. 720 */ 721 typedef struct { 722 mutex_t bucket_lock; /* protects the free list allocations */ 723 void *free_list; /* LIFO list of blocks to allocate/free */ 724 size_t chunks; /* number of 64K blocks mmap()ed last time */ 725 char pad64[64 - /* pad out to 64 bytes */ 726 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 727 } bucket_t; 728 729 #ifdef _SYSCALL32 730 typedef struct { 731 mutex_t bucket_lock; 732 caddr32_t free_list; 733 size32_t chunks; 734 char pad64[64 - /* pad out to 64 bytes */ 735 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 736 } bucket32_t; 737 #endif /* _SYSCALL32 */ 738 739 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 740 741 742 /* 743 * atexit() data structures. 744 * See port/gen/atexit.c for details. 745 */ 746 typedef void (*_exithdlr_func_t) (void); 747 748 typedef struct _exthdlr { 749 struct _exthdlr *next; /* next in handler list */ 750 _exithdlr_func_t hdlr; /* handler itself */ 751 } _exthdlr_t; 752 753 typedef struct { 754 mutex_t exitfns_lock; 755 _exthdlr_t *head; 756 void *exit_frame_monitor; 757 char exit_pad[64 - /* pad out to 64 bytes */ 758 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 759 } atexit_root_t; 760 761 #ifdef _SYSCALL32 762 typedef struct { 763 mutex_t exitfns_lock; 764 caddr32_t head; 765 caddr32_t exit_frame_monitor; 766 char exit_pad[64 - /* pad out to 64 bytes */ 767 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 768 } atexit_root32_t; 769 #endif /* _SYSCALL32 */ 770 771 772 /* 773 * This is data that is global to all link maps (uberdata, aka super-global). 774 */ 775 typedef struct uberdata { 776 pad_lock_t _link_lock; 777 pad32_lock_t _fork_lock; 778 pad32_lock_t _atfork_lock; 779 pad_lock_t _tdb_hash_lock; 780 tdb_sync_stats_t tdb_hash_lock_stats; 781 siguaction_t siguaction[NSIG]; 782 bucket_t bucket[NBUCKETS]; 783 atexit_root_t atexit_root; 784 tsd_metadata_t tsd_metadata; 785 tls_metadata_t tls_metadata; 786 /* 787 * Every object before this point has size and alignment of 64 bytes. 788 * Don't add any other type of data before this point. 789 */ 790 char primary_map; /* set when primary link map is initialized */ 791 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 792 char pad[2]; 793 uberflags_t uberflags; 794 queue_head_t *queue_head; 795 thr_hash_table_t *thr_hash_table; 796 uint_t hash_size; /* # of entries in thr_hash_table[] */ 797 uint_t hash_mask; /* hash_size - 1 */ 798 ulwp_t *ulwp_one; /* main thread */ 799 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 800 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 801 int nthreads; /* total number of live threads/lwps */ 802 int nzombies; /* total number of zombie threads */ 803 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 804 pid_t pid; /* the current process's pid */ 805 void (*sigacthandler)(int, siginfo_t *, void *); 806 ulwp_t *lwp_stacks; 807 ulwp_t *lwp_laststack; 808 int nfreestack; 809 int thread_stack_cache; 810 ulwp_t *ulwp_freelist; 811 ulwp_t *ulwp_lastfree; 812 ulwp_t *ulwp_replace_free; 813 ulwp_t *ulwp_replace_last; 814 atfork_t *atforklist; /* circular Q for fork handlers */ 815 robust_t **robustlocks; /* table of registered robust locks */ 816 struct uberdata **tdb_bootstrap; 817 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 818 } uberdata_t; 819 820 #define link_lock _link_lock.pad_lock 821 #define fork_lock _fork_lock.pad_lock 822 #define atfork_lock _atfork_lock.pad_lock 823 #define tdb_hash_lock _tdb_hash_lock.pad_lock 824 825 #pragma align 64(__uberdata) 826 extern uberdata_t __uberdata; 827 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 828 extern int primary_link_map; 829 830 #define ulwp_mutex(ulwp, udp) \ 831 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 832 #define ulwp_condvar(ulwp, udp) \ 833 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 834 835 /* 836 * Grab and release the hash table lock for the specified lwp. 837 */ 838 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 839 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 840 841 #ifdef _SYSCALL32 /* needed by libc_db */ 842 843 typedef struct ulwp32 { 844 #if defined(__sparc) 845 uint32_t ul_dinstr; /* scratch space for dtrace */ 846 uint32_t ul_padsparc0[15]; 847 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 848 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 849 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 850 uint32_t ul_dreturn; /* dtrace: return %o0 */ 851 #endif 852 caddr32_t ul_self; /* pointer to self */ 853 #if defined(__x86) 854 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 855 #endif 856 caddr32_t ul_uberdata; /* uber (super-global) data */ 857 tls32_t ul_tls; /* dynamic thread-local storage base */ 858 caddr32_t ul_forw; /* forw, back all_lwps list, */ 859 caddr32_t ul_back; /* protected by link_lock */ 860 caddr32_t ul_next; /* list to keep track of stacks */ 861 caddr32_t ul_hash; /* hash chain linked list */ 862 caddr32_t ul_rval; /* return value from thr_exit() */ 863 caddr32_t ul_stk; /* mapping base of the stack */ 864 size32_t ul_mapsiz; /* mapping size of the stack */ 865 size32_t ul_guardsize; /* normally _lpagesize */ 866 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 867 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 868 stack32_t ul_ustack; /* current stack boundaries */ 869 int ul_ix; /* hash index */ 870 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 871 pri_t ul_pri; /* priority known to the library */ 872 pri_t ul_mappedpri; /* priority known to the application */ 873 char ul_policy; /* scheduling policy */ 874 char ul_pri_mapped; /* != 0 means ul_mappedpri is valid */ 875 union { 876 struct { 877 char cursig; /* deferred signal number */ 878 char pleasestop; /* lwp requested to stop itself */ 879 } s; 880 short curplease; /* for testing both at once */ 881 } ul_cp; 882 char ul_stop; /* reason for stopping */ 883 char ul_signalled; /* this lwp was cond_signal()d */ 884 char ul_dead; /* this lwp has called thr_exit */ 885 char ul_unwind; /* posix: unwind C++ stack */ 886 char ul_detached; /* THR_DETACHED at thread_create() */ 887 /* or pthread_detach() was called */ 888 char ul_writer; /* sleeping in rw_wrlock() */ 889 char ul_stopping; /* set by curthread: stopping self */ 890 char ul_cancel_prologue; /* for _cancel_prologue() */ 891 short ul_preempt; /* no_preempt()/preempt() */ 892 short ul_savpreempt; /* pre-existing preempt value */ 893 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 894 char ul_main; /* thread is the main thread */ 895 char ul_fork; /* thread is performing a fork */ 896 char ul_primarymap; /* primary link-map is initialized */ 897 /* per-thread copies of the corresponding global variables */ 898 uchar_t ul_max_spinners; /* thread_max_spinners */ 899 char ul_door_noreserve; /* thread_door_noreserve */ 900 char ul_queue_fifo; /* thread_queue_fifo */ 901 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 902 char ul_error_detection; /* thread_error_detection */ 903 char ul_async_safe; /* thread_async_safe */ 904 char ul_pad1[2]; 905 int ul_adaptive_spin; /* thread_adaptive_spin */ 906 int ul_release_spin; /* thread_release_spin */ 907 int ul_queue_spin; /* thread_queue_spin */ 908 int ul_critical; /* non-zero == in a critical region */ 909 int ul_sigdefer; /* non-zero == defer signals */ 910 int ul_vfork; /* thread is the child of vfork() */ 911 int ul_cancelable; /* _cancelon()/_canceloff() */ 912 char ul_cancel_pending; /* pthread_cancel() was called */ 913 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 914 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 915 char ul_save_async; /* saved copy of ul_cancel_async */ 916 char ul_mutator; /* lwp is a mutator (java interface) */ 917 char ul_created; /* created suspended */ 918 char ul_replace; /* replacement; must be free()d */ 919 uchar_t ul_nocancel; /* cancellation can't happen */ 920 int ul_errno; /* per-thread errno */ 921 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 922 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 923 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 924 caddr32_t ul_schedctl; /* schedctl data */ 925 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 926 int ul_pad2; 927 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 928 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 929 td_evbuf32_t ul_td_evbuf; /* event buffer */ 930 char ul_td_events_enable; /* event mechanism enabled */ 931 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 932 char ul_qtype; /* MX or CV */ 933 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 934 int ul_usropts; /* flags given to thr_create() */ 935 caddr32_t ul_startpc; /* start func (thr_create()) */ 936 caddr32_t ul_startarg; /* argument for start function */ 937 caddr32_t ul_wchan; /* synch object when sleeping */ 938 caddr32_t ul_link; /* sleep queue link */ 939 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 940 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 941 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 942 pri_t ul_epri; /* effective scheduling priority */ 943 pri_t ul_emappedpri; /* effective mapped priority */ 944 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 945 /* 0 means there is but a single entry */ 946 union { /* single entry or pointer to array */ 947 readlock32_t single; 948 caddr32_t array; 949 } ul_readlock; 950 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 951 /* 0 means there is but a single entry */ 952 union { /* single entry or pointer to array */ 953 caddr32_t single; 954 caddr32_t array; 955 } ul_heldlocks; 956 /* PROBE_SUPPORT begin */ 957 caddr32_t ul_tpdp; 958 /* PROBE_SUPPORT end */ 959 caddr32_t ul_siglink; /* pointer to previous context */ 960 uint_t ul_spin_lock_spin; /* spin lock statistics */ 961 uint_t ul_spin_lock_spin2; 962 uint_t ul_spin_lock_sleep; 963 uint_t ul_spin_lock_wakeup; 964 /* the following members *must* be last in the structure */ 965 /* they are discarded when ulwp is replaced on thr_exit() */ 966 sigset32_t ul_sigmask; /* thread's current signal mask */ 967 sigset32_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 968 siginfo32_t ul_siginfo; /* deferred siginfo */ 969 mutex_t ul_spinlock; /* used when suspending/continuing */ 970 fpuenv32_t ul_fpuenv; /* floating point state */ 971 caddr32_t ul_sp; /* stack pointer when blocked */ 972 #if defined(sparc) 973 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 974 #endif 975 } ulwp32_t; 976 977 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 978 979 typedef struct uberdata32 { 980 pad_lock_t _link_lock; 981 pad32_lock_t _fork_lock; 982 pad32_lock_t _atfork_lock; 983 pad_lock_t _tdb_hash_lock; 984 tdb_sync_stats_t tdb_hash_lock_stats; 985 siguaction32_t siguaction[NSIG]; 986 bucket32_t bucket[NBUCKETS]; 987 atexit_root32_t atexit_root; 988 tsd_metadata32_t tsd_metadata; 989 tls_metadata32_t tls_metadata; 990 char primary_map; 991 char bucket_init; 992 char pad[2]; 993 uberflags_t uberflags; 994 caddr32_t queue_head; 995 caddr32_t thr_hash_table; 996 uint_t hash_size; 997 uint_t hash_mask; 998 caddr32_t ulwp_one; 999 caddr32_t all_lwps; 1000 caddr32_t all_zombies; 1001 int nthreads; 1002 int nzombies; 1003 int ndaemons; 1004 int pid; 1005 caddr32_t sigacthandler; 1006 caddr32_t lwp_stacks; 1007 caddr32_t lwp_laststack; 1008 int nfreestack; 1009 int thread_stack_cache; 1010 caddr32_t ulwp_freelist; 1011 caddr32_t ulwp_lastfree; 1012 caddr32_t ulwp_replace_free; 1013 caddr32_t ulwp_replace_last; 1014 caddr32_t atforklist; 1015 caddr32_t robustlocks; 1016 caddr32_t tdb_bootstrap; 1017 tdb32_t tdb; 1018 } uberdata32_t; 1019 1020 #endif /* _SYSCALL32 */ 1021 1022 /* ul_stop values */ 1023 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1024 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1025 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1026 1027 /* 1028 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1029 */ 1030 1031 typedef struct _cvattr { 1032 int pshared; 1033 clockid_t clockid; 1034 } cvattr_t; 1035 1036 typedef struct _mattr { 1037 int pshared; 1038 int protocol; 1039 int prioceiling; 1040 int type; 1041 int robustness; 1042 } mattr_t; 1043 1044 typedef struct _thrattr { 1045 size_t stksize; 1046 void *stkaddr; 1047 int detachstate; 1048 int daemonstate; 1049 int scope; 1050 int prio; 1051 int policy; 1052 int inherit; 1053 size_t guardsize; 1054 } thrattr_t; 1055 1056 typedef struct _rwlattr { 1057 int pshared; 1058 } rwlattr_t; 1059 1060 /* _curthread() is inline for speed */ 1061 extern ulwp_t *_curthread(void); 1062 #define curthread (_curthread()) 1063 1064 /* this version (also inline) can be tested for NULL */ 1065 extern ulwp_t *__curthread(void); 1066 1067 /* get the current stack pointer (also inline) */ 1068 extern greg_t stkptr(void); 1069 1070 /* 1071 * Suppress __attribute__((...)) if we are not compiling with gcc 1072 */ 1073 #if !defined(__GNUC__) 1074 #define __attribute__(string) 1075 #endif 1076 1077 /* 1078 * Implementation functions. Not visible outside of the library itself. 1079 */ 1080 extern int __nanosleep(const timespec_t *, timespec_t *); 1081 extern void getgregs(ulwp_t *, gregset_t); 1082 extern void setgregs(ulwp_t *, gregset_t); 1083 extern void thr_panic(const char *); 1084 #pragma rarely_called(thr_panic) 1085 extern ulwp_t *find_lwp(thread_t); 1086 extern int real_priority(ulwp_t *); 1087 extern void finish_init(void); 1088 extern void queue_alloc(void); 1089 extern void tsd_exit(void); 1090 extern void tsd_free(ulwp_t *); 1091 extern void tls_setup(void); 1092 extern void tls_exit(void); 1093 extern void tls_free(ulwp_t *); 1094 extern void rwl_free(ulwp_t *); 1095 extern void heldlock_exit(void); 1096 extern void heldlock_free(ulwp_t *); 1097 extern void sigacthandler(int, siginfo_t *, void *); 1098 extern void signal_init(void); 1099 extern int sigequalset(const sigset_t *, const sigset_t *); 1100 extern void mutex_setup(void); 1101 extern void take_deferred_signal(int); 1102 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1103 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1104 extern volatile sc_shared_t *setup_schedctl(void); 1105 extern void *lmalloc(size_t); 1106 extern void lfree(void *, size_t); 1107 extern void *libc_malloc(size_t); 1108 extern void *libc_realloc(void *, size_t); 1109 extern void libc_free(void *); 1110 extern char *libc_strdup(const char *); 1111 extern void ultos(uint64_t, int, char *); 1112 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1113 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1114 extern void thread_error(const char *); 1115 extern void grab_assert_lock(void); 1116 extern void dump_queue_statistics(void); 1117 extern void collect_queue_statistics(void); 1118 extern void record_spin_locks(ulwp_t *); 1119 extern void remember_lock(mutex_t *); 1120 extern void forget_lock(mutex_t *); 1121 extern void register_lock(mutex_t *); 1122 extern void unregister_locks(void); 1123 #if defined(__sparc) 1124 extern void _flush_windows(void); 1125 #else 1126 #define _flush_windows() 1127 #endif 1128 extern void set_curthread(void *); 1129 1130 /* 1131 * Utility function used when waking up many threads (more than MAXLWPS) 1132 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1133 */ 1134 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1135 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1136 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1137 1138 /* enter a critical section */ 1139 #define enter_critical(self) (self->ul_critical++) 1140 1141 /* exit a critical section, take deferred actions if necessary */ 1142 extern void do_exit_critical(void); 1143 #define exit_critical(self) \ 1144 (void) (self->ul_critical--, \ 1145 ((self->ul_curplease && self->ul_critical == 0)? \ 1146 (do_exit_critical(), 0) : 0)) 1147 1148 /* 1149 * Like enter_critical()/exit_critical() but just for deferring signals. 1150 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1151 * calling application functions like constructors and destructors. 1152 * Care must be taken if the application function attempts to set 1153 * the signal mask while a deferred signal is present; the setting 1154 * of the signal mask must also be deferred. 1155 */ 1156 #define sigoff(self) (self->ul_sigdefer++) 1157 extern void sigon(ulwp_t *); 1158 1159 /* these are exported functions */ 1160 extern void _sigoff(void); 1161 extern void _sigon(void); 1162 1163 #define sigorset(s1, s2) \ 1164 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1165 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1166 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1167 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1168 1169 #define sigandset(s1, s2) \ 1170 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1171 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1172 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1173 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1174 1175 #define sigdiffset(s1, s2) \ 1176 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1177 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1178 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1179 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1180 1181 #define delete_reserved_signals(s) \ 1182 (((s)->__sigbits[0] &= MASKSET0), \ 1183 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1184 ((s)->__sigbits[2] = 0), \ 1185 ((s)->__sigbits[3] = 0)) 1186 1187 extern void block_all_signals(ulwp_t *self); 1188 1189 /* 1190 * When restoring the signal mask after having previously called 1191 * block_all_signals(), if we have a deferred signal present then 1192 * do nothing other than ASSERT() that we are in a critical region. 1193 * The signal mask will be set when we emerge from the critical region 1194 * and call take_deferred_signal(). There is no race condition here 1195 * because the kernel currently has all signals blocked for this thread. 1196 */ 1197 #define restore_signals(self) \ 1198 ((void) ((self)->ul_cursig? \ 1199 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1200 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask, NULL))) 1201 1202 extern void set_parking_flag(ulwp_t *, int); 1203 1204 extern void *_thr_setup(ulwp_t *); 1205 extern void _fpinherit(ulwp_t *); 1206 extern void _lwp_start(void); 1207 extern void _lwp_terminate(void); 1208 extern void lmutex_lock(mutex_t *); 1209 extern void lmutex_unlock(mutex_t *); 1210 extern void lrw_rdlock(rwlock_t *); 1211 extern void lrw_wrlock(rwlock_t *); 1212 extern void lrw_unlock(rwlock_t *); 1213 extern void sig_mutex_lock(mutex_t *); 1214 extern void sig_mutex_unlock(mutex_t *); 1215 extern int sig_mutex_trylock(mutex_t *); 1216 extern int sig_cond_wait(cond_t *, mutex_t *); 1217 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1218 extern void _prefork_handler(void); 1219 extern void _postfork_parent_handler(void); 1220 extern void _postfork_child_handler(void); 1221 extern void postfork1_child(void); 1222 extern void postfork1_child_aio(void); 1223 extern void postfork1_child_sigev_aio(void); 1224 extern void postfork1_child_sigev_mq(void); 1225 extern void postfork1_child_sigev_timer(void); 1226 extern void postfork1_child_tpool(void); 1227 extern void fork_lock_enter(void); 1228 extern void fork_lock_exit(void); 1229 extern void suspend_fork(void); 1230 extern void continue_fork(int); 1231 extern void do_sigcancel(void); 1232 extern void setup_cancelsig(int); 1233 extern void init_sigev_thread(void); 1234 extern void init_aio(void); 1235 extern void _cancelon(void); 1236 extern void _canceloff(void); 1237 extern void _canceloff_nocancel(void); 1238 extern void _cancel_prologue(void); 1239 extern void _cancel_epilogue(void); 1240 extern void no_preempt(ulwp_t *); 1241 extern void preempt(ulwp_t *); 1242 extern void _thrp_unwind(void *); 1243 1244 /* 1245 * Prototypes for the strong versions of the interface functions 1246 */ 1247 extern pid_t __forkx(int); 1248 extern pid_t __forkallx(int); 1249 extern pid_t _private_getpid(void); 1250 extern uid_t _private_geteuid(void); 1251 extern int _kill(pid_t, int); 1252 extern int _open(const char *, int, ...); 1253 extern int _close(int); 1254 extern ssize_t _read(int, void *, size_t); 1255 extern ssize_t _write(int, const void *, size_t); 1256 extern void *_memcpy(void *, const void *, size_t); 1257 extern void *_memset(void *, int, size_t); 1258 extern int _memcmp(const void *, const void *, size_t); 1259 extern void *_private_memcpy(void *, const void *, size_t); 1260 extern void *_private_memset(void *, int, size_t); 1261 extern int _private_sigfillset(sigset_t *); 1262 extern int _private_sigemptyset(sigset_t *); 1263 extern int _private_sigaddset(sigset_t *, int); 1264 extern int _private_sigdelset(sigset_t *, int); 1265 extern int _private_sigismember(sigset_t *, int); 1266 extern void *_private_mmap(void *, size_t, int, int, int, off_t); 1267 extern int _private_mprotect(void *, size_t, int); 1268 extern int _private_munmap(void *, size_t); 1269 extern int _private_getrlimit(int, struct rlimit *); 1270 extern int __lwp_continue(lwpid_t); 1271 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1272 extern int __lwp_kill(lwpid_t, int); 1273 extern lwpid_t __lwp_self(void); 1274 extern int ___lwp_suspend(lwpid_t); 1275 extern void lwp_yield(void); 1276 extern int lwp_wait(lwpid_t, lwpid_t *); 1277 extern int __lwp_wait(lwpid_t, lwpid_t *); 1278 extern int __lwp_detach(lwpid_t); 1279 extern sc_shared_t *__schedctl(void); 1280 1281 extern int _private_setcontext(const ucontext_t *); 1282 extern int _private_getcontext(ucontext_t *); 1283 #pragma unknown_control_flow(_private_getcontext) 1284 /* actual system call traps */ 1285 extern int __setcontext_syscall(const ucontext_t *); 1286 extern int __getcontext_syscall(ucontext_t *); 1287 extern int _private_setustack(stack_t *); 1288 extern int __clock_gettime(clockid_t, timespec_t *); 1289 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1290 extern void hrt2ts(hrtime_t, timespec_t *); 1291 1292 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1293 extern int __lwp_sigmask(int, const sigset_t *, sigset_t *); 1294 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1295 extern caddr_t __sighndlrend; 1296 #pragma unknown_control_flow(__sighndlr) 1297 extern void _siglongjmp(sigjmp_buf, int); 1298 1299 extern int _pthread_setspecific(pthread_key_t, const void *); 1300 extern void *_pthread_getspecific(pthread_key_t); 1301 extern void _pthread_exit(void *); 1302 extern void _private_testcancel(void); 1303 1304 /* belongs in <pthread.h> */ 1305 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1306 #define PTHREAD_CREATE_NONDAEMON_NP 0 1307 extern int _pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1308 extern int _pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1309 1310 /* these are private to the library */ 1311 extern int _private_mutex_init(mutex_t *, int, void *); 1312 extern int _private_mutex_destroy(mutex_t *); 1313 extern int _private_mutex_lock(mutex_t *); 1314 extern int _private_mutex_trylock(mutex_t *); 1315 extern int _private_mutex_unlock(mutex_t *); 1316 1317 extern int _mutex_init(mutex_t *, int, void *); 1318 extern int _mutex_destroy(mutex_t *); 1319 extern int _mutex_consistent(mutex_t *); 1320 extern int _mutex_lock(mutex_t *); 1321 extern int _mutex_trylock(mutex_t *); 1322 extern int _mutex_unlock(mutex_t *); 1323 extern int __mutex_init(mutex_t *, int, void *); 1324 extern int __mutex_destroy(mutex_t *); 1325 extern int __mutex_consistent(mutex_t *); 1326 extern int __mutex_lock(mutex_t *); 1327 extern int __mutex_trylock(mutex_t *); 1328 extern int __mutex_unlock(mutex_t *); 1329 extern int mutex_is_held(mutex_t *); 1330 1331 extern int _cond_init(cond_t *, int, void *); 1332 extern int _cond_wait(cond_t *, mutex_t *); 1333 extern int _cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1334 extern int _cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1335 extern int _cond_signal(cond_t *); 1336 extern int _cond_broadcast(cond_t *); 1337 extern int _cond_destroy(cond_t *); 1338 extern int cond_signal_internal(cond_t *); 1339 extern int cond_broadcast_internal(cond_t *); 1340 1341 extern int __rwlock_init(rwlock_t *, int, void *); 1342 extern int rw_read_is_held(rwlock_t *); 1343 extern int rw_write_is_held(rwlock_t *); 1344 1345 extern void _membar_enter(void); 1346 extern void _membar_exit(void); 1347 extern void _membar_producer(void); 1348 extern void _membar_consumer(void); 1349 1350 extern int _thr_continue(thread_t); 1351 extern int _thr_create(void *, size_t, void *(*)(void *), void *, long, 1352 thread_t *); 1353 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1354 thread_t *, pri_t, int, size_t); 1355 extern int _thr_getprio(thread_t, int *); 1356 extern int _thr_getspecific(thread_key_t, void **); 1357 extern int _thr_join(thread_t, thread_t *, void **); 1358 extern int _thr_keycreate(thread_key_t *, PFrV); 1359 extern int _thr_keycreate_once(thread_key_t *, PFrV); 1360 extern int _thr_key_delete(thread_key_t); 1361 extern int _thr_main(void); 1362 extern thread_t _thr_self(void); 1363 extern int _thr_getconcurrency(void); 1364 extern int _thr_setconcurrency(int); 1365 extern int _thr_setprio(thread_t, int); 1366 extern int _thr_setspecific(thread_key_t, void *); 1367 extern int _thr_stksegment(stack_t *); 1368 extern int _thrp_suspend(thread_t, uchar_t); 1369 extern int _thrp_continue(thread_t, uchar_t); 1370 extern int _thr_sigsetmask(int, const sigset_t *, sigset_t *); 1371 1372 extern void _thr_terminate(void *); 1373 extern void _thr_exit(void *); 1374 extern void _thrp_exit(void); 1375 1376 extern const thrattr_t *def_thrattr(void); 1377 extern int _thread_setschedparam_main(pthread_t, int, 1378 const struct sched_param *, int); 1379 extern int _validate_rt_prio(int, int); 1380 extern int _thrp_setlwpprio(lwpid_t, int, int); 1381 extern pri_t map_rtpri_to_gp(pri_t); 1382 extern int get_info_by_policy(int); 1383 1384 /* 1385 * System call wrappers (direct interfaces to the kernel) 1386 */ 1387 extern int ___lwp_mutex_register(mutex_t *); 1388 extern int ___lwp_mutex_trylock(mutex_t *); 1389 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *); 1390 extern int ___lwp_mutex_unlock(mutex_t *); 1391 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1392 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1393 extern int __lwp_cond_signal(lwp_cond_t *); 1394 extern int __lwp_cond_broadcast(lwp_cond_t *); 1395 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1396 extern int __lwp_sema_trywait(lwp_sema_t *); 1397 extern int __lwp_sema_post(lwp_sema_t *); 1398 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1399 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1400 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1401 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1402 extern int __lwp_rwlock_unlock(rwlock_t *); 1403 extern int __lwp_park(timespec_t *, lwpid_t); 1404 extern int __lwp_unpark(lwpid_t); 1405 extern int __lwp_unpark_all(lwpid_t *, int); 1406 #if defined(__x86) 1407 extern int ___lwp_private(int, int, void *); 1408 #endif /* __x86 */ 1409 1410 extern int _private_lwp_mutex_lock(mutex_t *); 1411 extern int _private_lwp_mutex_unlock(mutex_t *); 1412 1413 /* 1414 * inlines 1415 */ 1416 extern int set_lock_byte(volatile uint8_t *); 1417 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1418 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1419 extern void atomic_inc_32(volatile uint32_t *); 1420 extern void atomic_dec_32(volatile uint32_t *); 1421 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1422 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1423 #if defined(__sparc) 1424 extern ulong_t caller(void); 1425 extern ulong_t getfp(void); 1426 #endif /* __sparc */ 1427 1428 #include "thr_inlines.h" 1429 1430 #endif /* _THR_UBERDATA_H */ 1431