1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _THR_UBERDATA_H 28 #define _THR_UBERDATA_H 29 30 #include <stdlib.h> 31 #include <unistd.h> 32 #include <sys/types.h> 33 #include <fcntl.h> 34 #include <string.h> 35 #include <signal.h> 36 #include <ucontext.h> 37 #include <thread.h> 38 #include <pthread.h> 39 #include <atomic.h> 40 #include <link.h> 41 #include <sys/resource.h> 42 #include <sys/lwp.h> 43 #include <errno.h> 44 #include <sys/asm_linkage.h> 45 #include <sys/regset.h> 46 #include <sys/fcntl.h> 47 #include <sys/mman.h> 48 #include <synch.h> 49 #include <door.h> 50 #include <limits.h> 51 #include <sys/synch32.h> 52 #include <schedctl.h> 53 #include <sys/priocntl.h> 54 #include <thread_db.h> 55 #include <setjmp.h> 56 #include "libc_int.h" 57 #include "tdb_agent.h" 58 #include "thr_debug.h" 59 60 /* 61 * This is an implementation-specific include file for threading support. 62 * It is not to be seen by the clients of the library. 63 * 64 * This file also describes uberdata in libc. 65 * 66 * The term "uberdata" refers to data that is unique and visible across 67 * all link maps. The name is meant to imply that such data is truly 68 * global, not just locally global to a particular link map. 69 * 70 * See the Linker and Libraries Guide for a full description of alternate 71 * link maps and how they are set up and used. 72 * 73 * Alternate link maps implement multiple global namespaces within a single 74 * process. There may be multiple instances of identical dynamic libraries 75 * loaded in a process's address space at the same time, each on a different 76 * link map (as determined by the dynamic linker), each with its own set of 77 * global variables. Which particular instance of a global variable is seen 78 * by a thread running in the process is determined by the link map on which 79 * the thread happens to be executing at the time. 80 * 81 * However, there are aspects of a process that are unique across all 82 * link maps, in particular the structures used to implement threads 83 * of control (in Sparc terminology, there is only one %g7 regardless 84 * of the link map on which the thread is executing). 85 * 86 * All uberdata is referenced from a base pointer in the thread's ulwp_t 87 * structure (which is also uberdata). All allocations and deallocations 88 * of uberdata are made via the uberdata-aware lmalloc() and lfree() 89 * interfaces (malloc() and free() are simply locally-global). 90 */ 91 92 /* 93 * Special libc-private access to errno. 94 * We do this so that references to errno do not invoke the dynamic linker. 95 */ 96 #undef errno 97 #define errno (*curthread->ul_errnop) 98 99 /* 100 * See <sys/synch32.h> for the reasons for these values 101 * and why they are different for sparc and intel. 102 */ 103 #if defined(__sparc) 104 105 /* 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 0 113 114 #define PIDSHIFT 32 115 #define LOCKMASK64 0xffffffffff000000ULL 116 #define LOCKBYTE64 0x00000000ff000000ULL 117 #define WAITERMASK64 0x00000000000000ffULL 118 #define SPINNERMASK64 0x0000000000ff0000ULL 119 120 #elif defined(__x86) 121 122 /* lock.lock64.pad[x] 7 6 5 4 */ 123 #define LOCKMASK 0xff000000 124 #define WAITERMASK 0x00ff0000 125 #define SPINNERMASK 0x0000ff00 126 #define SPINNERSHIFT 8 127 #define WAITER 0x00010000 128 #define LOCKSET 0x01 129 #define LOCKCLEAR 0 130 131 #define PIDSHIFT 0 132 #define LOCKMASK64 0xff000000ffffffffULL 133 #define LOCKBYTE64 0x0100000000000000ULL 134 #define WAITERMASK64 0x00ff000000000000ULL 135 #define SPINNERMASK64 0x0000ff0000000000ULL 136 137 #else 138 #error "neither __sparc nor __x86 is defined" 139 #endif 140 141 /* 142 * Fetch the owner of a USYNC_THREAD mutex. 143 * Don't use this with process-shared mutexes; 144 * the owing thread may be in a different process. 145 */ 146 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 147 148 /* 149 * Test if a thread owns a process-private (USYNC_THREAD) mutex. 150 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex. 151 * The 'mp' argument must not have side-effects since it is evaluated twice. 152 */ 153 #define MUTEX_OWNED(mp, thrp) \ 154 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 155 156 157 /* 158 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 159 * collection of lock statistics by a debugger or other collecting tool. 160 * 161 * uberflags.uf_thread_error_detection is set by an environment variable: 162 * _THREAD_ERROR_DETECTION 163 * 0 == no detection of locking primitive errors. 164 * 1 == detect errors and issue a warning message. 165 * 2 == detect errors, issue a warning message, and dump core. 166 * 167 * We bundle these together in uberflags.uf_trs_ted to make a test of either 168 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 169 * 170 * uberflags.uf_mt is set non-zero when the first thread (in addition 171 * to the main thread) is created. 172 * 173 * We bundle all these flags together in uberflags.uf_all to make a test 174 * of any being non-zero a single memory reference (again, for speed). 175 */ 176 typedef union { 177 int uf_all; /* combined all flags */ 178 struct { 179 short h_pad; 180 short h_trs_ted; /* combined reg sync & error detect */ 181 } uf_h; 182 struct { 183 char x_mt; 184 char x_pad; 185 char x_tdb_register_sync; 186 char x_thread_error_detection; 187 } uf_x; 188 } uberflags_t; 189 190 #define uf_mt uf_x.x_mt 191 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 192 #define uf_thread_error_detection uf_x.x_thread_error_detection 193 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 194 195 /* 196 * NOTE WELL: 197 * To enable further optimization, the "ul_schedctl_called" member 198 * of the ulwp_t structure (below) serves double-duty: 199 * 1. If NULL, it means that the thread must call __schedctl() 200 * to set up its schedctl mappings before acquiring a mutex. 201 * This is required by the implementation of adaptive mutex locking. 202 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 203 * uberflags can be made without additional memory references. 204 * This allows the common case of _mutex_lock() and _mutex_unlock() for 205 * USYNC_THREAD mutexes with no error detection and no lock statistics 206 * to be optimized for speed. 207 */ 208 209 /* double the default stack size for 64-bit processes */ 210 #ifdef _LP64 211 #define MINSTACK (8 * 1024) 212 #define DEFAULTSTACK (2 * 1024 * 1024) 213 #else 214 #define MINSTACK (4 * 1024) 215 #define DEFAULTSTACK (1024 * 1024) 216 #endif 217 218 #define MUTEX_TRY 0 219 #define MUTEX_LOCK 1 220 #define MUTEX_NOCEIL 0x40 221 222 #if defined(__x86) 223 224 typedef struct { /* structure returned by fnstenv */ 225 int fctrl; /* control word */ 226 int fstat; /* status word (flags, etc) */ 227 int ftag; /* tag of which regs busy */ 228 int misc[4]; /* other stuff, 28 bytes total */ 229 } fpuenv_t; 230 231 #ifdef _SYSCALL32 232 typedef fpuenv_t fpuenv32_t; 233 #endif /* _SYSCALL32 */ 234 235 #elif defined(__sparc) 236 237 typedef struct { /* fp state structure */ 238 greg_t fsr; 239 greg_t fpu_en; 240 } fpuenv_t; 241 242 #ifdef _SYSCALL32 243 typedef struct { 244 greg32_t fsr; 245 greg32_t fpu_en; 246 } fpuenv32_t; 247 #endif /* _SYSCALL32 */ 248 249 #endif /* __x86 */ 250 251 #if defined(__x86) 252 extern void ht_pause(void); /* "pause" instruction */ 253 #define SMT_PAUSE() ht_pause() 254 #else 255 #define SMT_PAUSE() 256 #endif /* __x86 */ 257 258 /* 259 * Cleanup handler related data. 260 * This structure is exported as _cleanup_t in pthread.h. 261 * pthread.h exports only the size of this structure, so check 262 * _cleanup_t in pthread.h before making any change here. 263 */ 264 typedef struct __cleanup { 265 struct __cleanup *next; /* pointer to next handler */ 266 caddr_t fp; /* current frame pointer */ 267 void (*func)(void *); /* cleanup handler address */ 268 void *arg; /* handler's argument */ 269 } __cleanup_t; 270 271 /* 272 * Thread-Specific Data (TSD) 273 * TSD_NFAST includes the invalid key zero, so there 274 * are really only (TSD_NFAST - 1) fast key slots. 275 */ 276 typedef void (*PFrV)(void *); 277 #define TSD_UNALLOCATED ((PFrV)1) 278 #define TSD_NFAST 9 279 280 /* 281 * The tsd union is designed to burn a little memory (9 words) to make 282 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 283 * end of the pad region to increase the likelihood that it falls on the 284 * same cache line as the data. 285 */ 286 typedef union tsd { 287 uint_t tsd_nalloc; /* Amount of allocated storage */ 288 void *tsd_pad[TSD_NFAST]; 289 void *tsd_data[1]; 290 } tsd_t; 291 292 typedef struct { 293 mutex_t tsdm_lock; /* Lock protecting the data */ 294 uint_t tsdm_nkeys; /* Number of allocated keys */ 295 uint_t tsdm_nused; /* Number of used keys */ 296 PFrV *tsdm_destro; /* Per-key destructors */ 297 char tsdm_pad[64 - /* pad to 64 bytes */ 298 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 299 } tsd_metadata_t; 300 301 #ifdef _SYSCALL32 302 typedef union tsd32 { 303 uint_t tsd_nalloc; /* Amount of allocated storage */ 304 caddr32_t tsd_pad[TSD_NFAST]; 305 caddr32_t tsd_data[1]; 306 } tsd32_t; 307 308 typedef struct { 309 mutex_t tsdm_lock; /* Lock protecting the data */ 310 uint_t tsdm_nkeys; /* Number of allocated keys */ 311 uint_t tsdm_nused; /* Number of used keys */ 312 caddr32_t tsdm_destro; /* Per-key destructors */ 313 char tsdm_pad[64 - /* pad to 64 bytes */ 314 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 315 } tsd_metadata32_t; 316 #endif /* _SYSCALL32 */ 317 318 319 /* 320 * Thread-Local Storage (TLS) 321 */ 322 typedef struct { 323 void *tls_data; 324 size_t tls_size; 325 } tls_t; 326 327 typedef struct { 328 mutex_t tls_lock; /* Lock protecting the data */ 329 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 330 tls_t static_tls; /* Template for static TLS */ 331 char tls_pad[64 - /* pad to 64 bytes */ 332 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 333 } tls_metadata_t; 334 335 #ifdef _SYSCALL32 336 typedef struct { 337 caddr32_t tls_data; 338 size32_t tls_size; 339 } tls32_t; 340 341 typedef struct { 342 mutex_t tls_lock; /* Lock protecting the data */ 343 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 344 tls32_t static_tls; /* Template for static TLS */ 345 char tls_pad[64 - /* pad to 64 bytes */ 346 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 347 } tls_metadata32_t; 348 #endif /* _SYSCALL32 */ 349 350 351 /* 352 * Sleep queue root for USYNC_THREAD condvars and mutexes. 353 * There is a default queue root for each queue head (see below). 354 * Also, each ulwp_t contains a queue root that can be used 355 * when the thread is enqueued on the queue, if necessary 356 * (when more than one wchan hashes to the same queue head). 357 */ 358 typedef struct queue_root { 359 struct queue_root *qr_next; 360 struct queue_root *qr_prev; 361 struct ulwp *qr_head; 362 struct ulwp *qr_tail; 363 void *qr_wchan; 364 uint32_t qr_rtcount; 365 uint32_t qr_qlen; 366 uint32_t qr_qmax; 367 } queue_root_t; 368 369 #ifdef _SYSCALL32 370 typedef struct queue_root32 { 371 caddr32_t qr_next; 372 caddr32_t qr_prev; 373 caddr32_t qr_head; 374 caddr32_t qr_tail; 375 caddr32_t qr_wchan; 376 uint32_t qr_rtcount; 377 uint32_t qr_qlen; 378 uint32_t qr_qmax; 379 } queue_root32_t; 380 #endif 381 382 /* 383 * Sleep queue heads for USYNC_THREAD condvars and mutexes. 384 * The size and alignment is 128 bytes to reduce cache conflicts. 385 * Each queue head points to a list of queue roots, defined above. 386 * Each queue head contains a default queue root for use when only one 387 * is needed. It is always at the tail of the queue root hash chain. 388 */ 389 typedef union { 390 uint64_t qh_64[16]; 391 struct { 392 mutex_t q_lock; 393 uint8_t q_qcnt; 394 uint8_t q_type; /* MX or CV */ 395 uint8_t q_pad1[2]; 396 uint32_t q_lockcount; 397 uint32_t q_qlen; 398 uint32_t q_qmax; 399 void *q_wchan; /* valid only while locked */ 400 struct queue_root *q_root; /* valid only while locked */ 401 struct queue_root *q_hlist; 402 #if !defined(_LP64) 403 caddr_t q_pad2[3]; 404 #endif 405 queue_root_t q_def_root; 406 uint32_t q_hlen; 407 uint32_t q_hmax; 408 } qh_qh; 409 } queue_head_t; 410 411 #define qh_lock qh_qh.q_lock 412 #define qh_qcnt qh_qh.q_qcnt 413 #define qh_type qh_qh.q_type 414 #if defined(THREAD_DEBUG) 415 #define qh_lockcount qh_qh.q_lockcount 416 #define qh_qlen qh_qh.q_qlen 417 #define qh_qmax qh_qh.q_qmax 418 #endif 419 #define qh_wchan qh_qh.q_wchan 420 #define qh_root qh_qh.q_root 421 #define qh_hlist qh_qh.q_hlist 422 #define qh_def_root qh_qh.q_def_root 423 #define qh_hlen qh_qh.q_hlen 424 #define qh_hmax qh_qh.q_hmax 425 426 /* queue types passed to queue_lock() */ 427 #define MX 0 428 #define CV 1 429 #define QHASHSHIFT 9 /* number of hashing bits */ 430 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */ 431 #define QUEUE_HASH(wchan, type) ((uint_t) \ 432 ((((uintptr_t)(wchan) >> 3) \ 433 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \ 434 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 435 436 extern queue_head_t *queue_lock(void *, int); 437 extern void queue_unlock(queue_head_t *); 438 extern void enqueue(queue_head_t *, struct ulwp *, int); 439 extern struct ulwp *dequeue(queue_head_t *, int *); 440 extern struct ulwp **queue_slot(queue_head_t *, struct ulwp **, int *); 441 extern struct ulwp *queue_waiter(queue_head_t *); 442 extern int dequeue_self(queue_head_t *); 443 extern void queue_unlink(queue_head_t *, 444 struct ulwp **, struct ulwp *); 445 extern void unsleep_self(void); 446 extern void spin_lock_set(mutex_t *); 447 extern void spin_lock_clear(mutex_t *); 448 449 /* 450 * Scheduling class information structure. 451 */ 452 typedef struct { 453 short pcc_state; 454 short pcc_policy; 455 pri_t pcc_primin; 456 pri_t pcc_primax; 457 pcinfo_t pcc_info; 458 } pcclass_t; 459 460 /* 461 * Memory block for chain of owned ceiling mutexes. 462 */ 463 typedef struct mxchain { 464 struct mxchain *mxchain_next; 465 mutex_t *mxchain_mx; 466 } mxchain_t; 467 468 /* 469 * Pointer to an rwlock that is held for reading. 470 * Used in rw_rdlock() to allow a thread that already holds a read 471 * lock to acquire another read lock on the same rwlock even if 472 * there are writers waiting. This to avoid deadlock when acquiring 473 * a read lock more than once in the presence of pending writers. 474 * POSIX mandates this behavior. 475 */ 476 typedef struct { 477 void *rd_rwlock; /* the rwlock held for reading */ 478 size_t rd_count; /* count of read locks applied */ 479 } readlock_t; 480 481 #ifdef _SYSCALL32 482 typedef struct { 483 caddr32_t rd_rwlock; 484 size32_t rd_count; 485 } readlock32_t; 486 #endif /* _SYSCALL32 */ 487 488 /* 489 * Maximum number of read locks allowed for one thread on one rwlock. 490 * This could be as large as INT_MAX, but the SUSV3 test suite would 491 * take an inordinately long time to complete. This is big enough. 492 */ 493 #define READ_LOCK_MAX 100000 494 495 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 496 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 497 498 /* 499 * Round up an integral value to a multiple of 64 500 */ 501 #define roundup64(x) (-(-(x) & -64)) 502 503 /* 504 * NOTE: Whatever changes are made to ulwp_t must be 505 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 506 * 507 * NOTE: ul_self *must* be the first member of ulwp_t on x86 508 * Low-level x86 code relies on this. 509 */ 510 typedef struct ulwp { 511 /* 512 * These members always need to come first on sparc. 513 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 514 */ 515 #if defined(__sparc) 516 uint32_t ul_dinstr; /* scratch space for dtrace */ 517 uint32_t ul_padsparc0[15]; 518 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 519 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 520 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 521 uint32_t ul_dreturn; /* dtrace: return %o0 */ 522 #endif 523 struct ulwp *ul_self; /* pointer to self */ 524 #if defined(__i386) 525 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 526 #elif defined(__amd64) 527 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 528 #endif 529 struct uberdata *ul_uberdata; /* uber (super-global) data */ 530 tls_t ul_tls; /* dynamic thread-local storage base */ 531 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 532 struct ulwp *ul_back; /* protected by link_lock */ 533 struct ulwp *ul_next; /* list to keep track of stacks */ 534 struct ulwp *ul_hash; /* hash chain linked list */ 535 void *ul_rval; /* return value from thr_exit() */ 536 caddr_t ul_stk; /* mapping base of the stack */ 537 size_t ul_mapsiz; /* mapping size of the stack */ 538 size_t ul_guardsize; /* normally _lpagesize */ 539 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 540 size_t ul_stksiz; /* broken thr_stksegment() interface */ 541 stack_t ul_ustack; /* current stack boundaries */ 542 int ul_ix; /* hash index */ 543 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 544 pri_t ul_pri; /* scheduling priority */ 545 pri_t ul_epri; /* real-time ceiling priority */ 546 char ul_policy; /* scheduling policy */ 547 char ul_cid; /* scheduling class id */ 548 union { 549 struct { 550 char cursig; /* deferred signal number */ 551 char pleasestop; /* lwp requested to stop itself */ 552 } s; 553 short curplease; /* for testing both at once */ 554 } ul_cp; 555 char ul_stop; /* reason for stopping */ 556 char ul_signalled; /* this lwp was cond_signal()d */ 557 char ul_dead; /* this lwp has called thr_exit */ 558 char ul_unwind; /* posix: unwind C++ stack */ 559 char ul_detached; /* THR_DETACHED at thread_create() */ 560 /* or pthread_detach() was called */ 561 char ul_writer; /* sleeping in rw_wrlock() */ 562 char ul_stopping; /* set by curthread: stopping self */ 563 char ul_cancel_prologue; /* for _cancel_prologue() */ 564 short ul_preempt; /* no_preempt()/preempt() */ 565 short ul_savpreempt; /* pre-existing preempt value */ 566 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 567 char ul_main; /* thread is the main thread */ 568 char ul_fork; /* thread is performing a fork */ 569 char ul_primarymap; /* primary link-map is initialized */ 570 /* per-thread copies of the corresponding global variables */ 571 uint8_t ul_max_spinners; /* thread_max_spinners */ 572 char ul_door_noreserve; /* thread_door_noreserve */ 573 char ul_queue_fifo; /* thread_queue_fifo */ 574 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 575 char ul_error_detection; /* thread_error_detection */ 576 char ul_async_safe; /* thread_async_safe */ 577 char ul_rt; /* found on an RT queue */ 578 char ul_rtqueued; /* was RT when queued */ 579 char ul_misaligned; /* thread_locks_misaligned */ 580 char ul_pad[3]; 581 int ul_adaptive_spin; /* thread_adaptive_spin */ 582 int ul_queue_spin; /* thread_queue_spin */ 583 volatile int ul_critical; /* non-zero == in a critical region */ 584 int ul_sigdefer; /* non-zero == defer signals */ 585 int ul_vfork; /* thread is the child of vfork() */ 586 int ul_cancelable; /* _cancelon()/_canceloff() */ 587 char ul_cancel_pending; /* pthread_cancel() was called */ 588 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 589 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 590 char ul_save_async; /* saved copy of ul_cancel_async */ 591 char ul_mutator; /* lwp is a mutator (java interface) */ 592 char ul_created; /* created suspended */ 593 char ul_replace; /* replacement; must be free()d */ 594 uchar_t ul_nocancel; /* cancellation can't happen */ 595 int ul_errno; /* per-thread errno */ 596 int *ul_errnop; /* pointer to errno or self->ul_errno */ 597 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 598 uberflags_t *ul_schedctl_called; /* ul_schedctl is set up */ 599 volatile sc_shared_t *ul_schedctl; /* schedctl data */ 600 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 601 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 602 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 603 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 604 td_evbuf_t ul_td_evbuf; /* event buffer */ 605 char ul_td_events_enable; /* event mechanism enabled */ 606 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 607 char ul_qtype; /* MX or CV */ 608 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 609 int ul_usropts; /* flags given to thr_create() */ 610 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 611 void *ul_startarg; /* argument for start function */ 612 void *ul_wchan; /* synch object when sleeping */ 613 struct ulwp *ul_link; /* sleep queue link */ 614 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 615 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 616 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 617 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 618 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 619 /* 0 means there is but a single entry */ 620 union { /* single entry or pointer to array */ 621 readlock_t single; 622 readlock_t *array; 623 } ul_readlock; 624 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 625 /* 0 means there is but a single entry */ 626 union { /* single entry or pointer to array */ 627 mutex_t *single; 628 mutex_t **array; 629 } ul_heldlocks; 630 /* PROBE_SUPPORT begin */ 631 void *ul_tpdp; 632 /* PROBE_SUPPORT end */ 633 ucontext_t *ul_siglink; /* pointer to previous context */ 634 uint_t ul_spin_lock_spin; /* spin lock statistics */ 635 uint_t ul_spin_lock_spin2; 636 uint_t ul_spin_lock_sleep; 637 uint_t ul_spin_lock_wakeup; 638 queue_root_t ul_queue_root; /* root of a sleep queue */ 639 id_t ul_rtclassid; /* real-time class id */ 640 uint_t ul_pilocks; /* count of PI locks held */ 641 /* the following members *must* be last in the structure */ 642 /* they are discarded when ulwp is replaced on thr_exit() */ 643 sigset_t ul_sigmask; /* thread's current signal mask */ 644 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 645 siginfo_t ul_siginfo; /* deferred siginfo */ 646 mutex_t ul_spinlock; /* used when suspending/continuing */ 647 fpuenv_t ul_fpuenv; /* floating point state */ 648 uintptr_t ul_sp; /* stack pointer when blocked */ 649 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 650 #if defined(sparc) 651 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 652 #endif 653 } ulwp_t; 654 655 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 656 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 657 #define ul_curplease ul_cp.curplease /* for testing both at once */ 658 659 /* 660 * This is the size of a replacement ulwp, retained only for the benefit 661 * of thr_join(). The trailing members are unneeded for this purpose. 662 */ 663 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 664 665 /* 666 * Definitions for static initialization of signal sets, 667 * plus some sneaky optimizations in various places. 668 */ 669 670 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 671 672 #if (MAXSIG > 32 && MAXSIG <= 64) 673 #define FILLSET0 0xffffffffu 674 #define FILLSET1 ((1u << (MAXSIG - 32)) - 1) 675 #else 676 #error "fix me: MAXSIG out of bounds" 677 #endif 678 679 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 680 #define CANTMASK1 0 681 682 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 683 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 684 685 extern const sigset_t maskset; /* set of all maskable signals */ 686 687 extern int thread_adaptive_spin; 688 extern uint_t thread_max_spinners; 689 extern int thread_queue_spin; 690 extern int thread_queue_fifo; 691 extern int thread_queue_dump; 692 extern int thread_cond_wait_defer; 693 extern int thread_async_safe; 694 extern int thread_queue_verify; 695 696 /* 697 * pthread_atfork() related data, used to store atfork handlers. 698 */ 699 typedef struct atfork { 700 struct atfork *forw; /* forward pointer */ 701 struct atfork *back; /* backward pointer */ 702 void (*prepare)(void); /* pre-fork handler */ 703 void (*parent)(void); /* post-fork parent handler */ 704 void (*child)(void); /* post-fork child handler */ 705 } atfork_t; 706 707 /* 708 * Element in the table of registered process robust locks. 709 * We keep track of these to make sure that we only call 710 * ___lwp_mutex_register() once for each such lock. 711 */ 712 typedef struct robust { 713 struct robust *robust_next; 714 mutex_t *robust_lock; 715 } robust_t; 716 717 /* 718 * Parameters of the lock registration hash table. 719 */ 720 #define LOCKSHIFT 15 /* number of hashing bits */ 721 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<15 == 32K) */ 722 #define LOCK_HASH(addr) (uint_t) \ 723 ((((uintptr_t)(addr) >> 3) \ 724 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 725 & (LOCKHASHSZ - 1)) 726 727 /* 728 * Make our hot locks reside on private cache lines (64 bytes). 729 */ 730 typedef struct { 731 mutex_t pad_lock; 732 char pad_pad[64 - sizeof (mutex_t)]; 733 } pad_lock_t; 734 735 /* 736 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 737 */ 738 typedef struct { 739 mutex_t pad_lock; 740 char pad_pad[32 - sizeof (mutex_t)]; 741 } pad32_lock_t; 742 743 /* 744 * The threads hash table is used for fast lookup and locking of an active 745 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 746 * thr_hash_table_t structures, where N == 1 before the main thread creates 747 * the first additional thread and N == 1024 afterwards. Each element of the 748 * table is 64 bytes in size and alignment to reduce cache conflicts. 749 */ 750 typedef struct { 751 mutex_t hash_lock; /* lock per bucket */ 752 cond_t hash_cond; /* convar per bucket */ 753 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 754 char hash_pad[64 - /* pad out to 64 bytes */ 755 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 756 } thr_hash_table_t; 757 758 #ifdef _SYSCALL32 759 typedef struct { 760 mutex_t hash_lock; 761 cond_t hash_cond; 762 caddr32_t hash_bucket; 763 char hash_pad[64 - 764 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 765 } thr_hash_table32_t; 766 #endif /* _SYSCALL32 */ 767 768 769 /* 770 * siguaction members have 128-byte size and 64-byte alignment. 771 * We know that sizeof (struct sigaction) is 32 bytes for both 772 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 773 */ 774 typedef struct { 775 rwlock_t sig_lock; 776 struct sigaction sig_uaction; 777 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 778 } siguaction_t; 779 780 #ifdef _SYSCALL32 781 typedef struct { 782 rwlock_t sig_lock; 783 struct sigaction32 sig_uaction; 784 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 785 } siguaction32_t; 786 #endif /* _SYSCALL32 */ 787 788 789 /* 790 * Bucket structures, used by lmalloc()/lfree(). 791 * See port/threads/alloc.c for details. 792 * A bucket's size and alignment is 64 bytes. 793 */ 794 typedef struct { 795 mutex_t bucket_lock; /* protects the free list allocations */ 796 void *free_list; /* LIFO list of blocks to allocate/free */ 797 size_t chunks; /* number of 64K blocks mmap()ed last time */ 798 char pad64[64 - /* pad out to 64 bytes */ 799 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 800 } bucket_t; 801 802 #ifdef _SYSCALL32 803 typedef struct { 804 mutex_t bucket_lock; 805 caddr32_t free_list; 806 size32_t chunks; 807 char pad64[64 - /* pad out to 64 bytes */ 808 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 809 } bucket32_t; 810 #endif /* _SYSCALL32 */ 811 812 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 813 814 815 /* 816 * atexit() data structures. 817 * See port/gen/atexit.c for details. 818 */ 819 typedef void (*_exithdlr_func_t) (void); 820 821 typedef struct _exthdlr { 822 struct _exthdlr *next; /* next in handler list */ 823 _exithdlr_func_t hdlr; /* handler itself */ 824 } _exthdlr_t; 825 826 typedef struct { 827 mutex_t exitfns_lock; 828 _exthdlr_t *head; 829 void *exit_frame_monitor; 830 char exit_pad[64 - /* pad out to 64 bytes */ 831 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 832 } atexit_root_t; 833 834 #ifdef _SYSCALL32 835 typedef struct { 836 mutex_t exitfns_lock; 837 caddr32_t head; 838 caddr32_t exit_frame_monitor; 839 char exit_pad[64 - /* pad out to 64 bytes */ 840 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 841 } atexit_root32_t; 842 #endif /* _SYSCALL32 */ 843 844 845 /* 846 * This is data that is global to all link maps (uberdata, aka super-global). 847 */ 848 typedef struct uberdata { 849 pad_lock_t _link_lock; 850 pad_lock_t _ld_lock; 851 pad_lock_t _fork_lock; 852 pad_lock_t _atfork_lock; 853 pad32_lock_t _callout_lock; 854 pad32_lock_t _tdb_hash_lock; 855 tdb_sync_stats_t tdb_hash_lock_stats; 856 siguaction_t siguaction[NSIG]; 857 bucket_t bucket[NBUCKETS]; 858 atexit_root_t atexit_root; 859 tsd_metadata_t tsd_metadata; 860 tls_metadata_t tls_metadata; 861 /* 862 * Every object before this point has size and alignment of 64 bytes. 863 * Don't add any other type of data before this point. 864 */ 865 char primary_map; /* set when primary link map is initialized */ 866 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 867 char pad[2]; 868 uberflags_t uberflags; 869 queue_head_t *queue_head; 870 thr_hash_table_t *thr_hash_table; 871 uint_t hash_size; /* # of entries in thr_hash_table[] */ 872 uint_t hash_mask; /* hash_size - 1 */ 873 ulwp_t *ulwp_one; /* main thread */ 874 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 875 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 876 int nthreads; /* total number of live threads/lwps */ 877 int nzombies; /* total number of zombie threads */ 878 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 879 pid_t pid; /* the current process's pid */ 880 void (*sigacthandler)(int, siginfo_t *, void *); 881 ulwp_t *lwp_stacks; 882 ulwp_t *lwp_laststack; 883 int nfreestack; 884 int thread_stack_cache; 885 ulwp_t *ulwp_freelist; 886 ulwp_t *ulwp_lastfree; 887 ulwp_t *ulwp_replace_free; 888 ulwp_t *ulwp_replace_last; 889 atfork_t *atforklist; /* circular Q for fork handlers */ 890 robust_t **robustlocks; /* table of registered robust locks */ 891 struct uberdata **tdb_bootstrap; 892 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 893 } uberdata_t; 894 895 #define link_lock _link_lock.pad_lock 896 #define ld_lock _ld_lock.pad_lock 897 #define fork_lock _fork_lock.pad_lock 898 #define atfork_lock _atfork_lock.pad_lock 899 #define callout_lock _callout_lock.pad_lock 900 #define tdb_hash_lock _tdb_hash_lock.pad_lock 901 902 #pragma align 64(__uberdata) 903 extern uberdata_t __uberdata; 904 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 905 extern int primary_link_map; 906 907 #define ulwp_mutex(ulwp, udp) \ 908 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 909 #define ulwp_condvar(ulwp, udp) \ 910 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 911 912 /* 913 * Grab and release the hash table lock for the specified lwp. 914 */ 915 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 916 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 917 918 #ifdef _SYSCALL32 /* needed by libc_db */ 919 920 typedef struct ulwp32 { 921 #if defined(__sparc) 922 uint32_t ul_dinstr; /* scratch space for dtrace */ 923 uint32_t ul_padsparc0[15]; 924 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 925 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 926 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 927 uint32_t ul_dreturn; /* dtrace: return %o0 */ 928 #endif 929 caddr32_t ul_self; /* pointer to self */ 930 #if defined(__x86) 931 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 932 #endif 933 caddr32_t ul_uberdata; /* uber (super-global) data */ 934 tls32_t ul_tls; /* dynamic thread-local storage base */ 935 caddr32_t ul_forw; /* forw, back all_lwps list, */ 936 caddr32_t ul_back; /* protected by link_lock */ 937 caddr32_t ul_next; /* list to keep track of stacks */ 938 caddr32_t ul_hash; /* hash chain linked list */ 939 caddr32_t ul_rval; /* return value from thr_exit() */ 940 caddr32_t ul_stk; /* mapping base of the stack */ 941 size32_t ul_mapsiz; /* mapping size of the stack */ 942 size32_t ul_guardsize; /* normally _lpagesize */ 943 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 944 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 945 stack32_t ul_ustack; /* current stack boundaries */ 946 int ul_ix; /* hash index */ 947 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 948 pri_t ul_pri; /* scheduling priority */ 949 pri_t ul_epri; /* real-time ceiling priority */ 950 char ul_policy; /* scheduling policy */ 951 char ul_cid; /* scheduling class id */ 952 union { 953 struct { 954 char cursig; /* deferred signal number */ 955 char pleasestop; /* lwp requested to stop itself */ 956 } s; 957 short curplease; /* for testing both at once */ 958 } ul_cp; 959 char ul_stop; /* reason for stopping */ 960 char ul_signalled; /* this lwp was cond_signal()d */ 961 char ul_dead; /* this lwp has called thr_exit */ 962 char ul_unwind; /* posix: unwind C++ stack */ 963 char ul_detached; /* THR_DETACHED at thread_create() */ 964 /* or pthread_detach() was called */ 965 char ul_writer; /* sleeping in rw_wrlock() */ 966 char ul_stopping; /* set by curthread: stopping self */ 967 char ul_cancel_prologue; /* for _cancel_prologue() */ 968 short ul_preempt; /* no_preempt()/preempt() */ 969 short ul_savpreempt; /* pre-existing preempt value */ 970 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 971 char ul_main; /* thread is the main thread */ 972 char ul_fork; /* thread is performing a fork */ 973 char ul_primarymap; /* primary link-map is initialized */ 974 /* per-thread copies of the corresponding global variables */ 975 uint8_t ul_max_spinners; /* thread_max_spinners */ 976 char ul_door_noreserve; /* thread_door_noreserve */ 977 char ul_queue_fifo; /* thread_queue_fifo */ 978 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 979 char ul_error_detection; /* thread_error_detection */ 980 char ul_async_safe; /* thread_async_safe */ 981 char ul_rt; /* found on an RT queue */ 982 char ul_rtqueued; /* was RT when queued */ 983 char ul_misaligned; /* thread_locks_misaligned */ 984 char ul_pad[3]; 985 int ul_adaptive_spin; /* thread_adaptive_spin */ 986 int ul_queue_spin; /* thread_queue_spin */ 987 int ul_critical; /* non-zero == in a critical region */ 988 int ul_sigdefer; /* non-zero == defer signals */ 989 int ul_vfork; /* thread is the child of vfork() */ 990 int ul_cancelable; /* _cancelon()/_canceloff() */ 991 char ul_cancel_pending; /* pthread_cancel() was called */ 992 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 993 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 994 char ul_save_async; /* saved copy of ul_cancel_async */ 995 char ul_mutator; /* lwp is a mutator (java interface) */ 996 char ul_created; /* created suspended */ 997 char ul_replace; /* replacement; must be free()d */ 998 uchar_t ul_nocancel; /* cancellation can't happen */ 999 int ul_errno; /* per-thread errno */ 1000 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 1001 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 1002 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 1003 caddr32_t ul_schedctl; /* schedctl data */ 1004 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 1005 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 1006 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 1007 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 1008 td_evbuf32_t ul_td_evbuf; /* event buffer */ 1009 char ul_td_events_enable; /* event mechanism enabled */ 1010 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 1011 char ul_qtype; /* MX or CV */ 1012 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 1013 int ul_usropts; /* flags given to thr_create() */ 1014 caddr32_t ul_startpc; /* start func (thr_create()) */ 1015 caddr32_t ul_startarg; /* argument for start function */ 1016 caddr32_t ul_wchan; /* synch object when sleeping */ 1017 caddr32_t ul_link; /* sleep queue link */ 1018 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 1019 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 1020 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 1021 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 1022 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 1023 /* 0 means there is but a single entry */ 1024 union { /* single entry or pointer to array */ 1025 readlock32_t single; 1026 caddr32_t array; 1027 } ul_readlock; 1028 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 1029 /* 0 means there is but a single entry */ 1030 union { /* single entry or pointer to array */ 1031 caddr32_t single; 1032 caddr32_t array; 1033 } ul_heldlocks; 1034 /* PROBE_SUPPORT begin */ 1035 caddr32_t ul_tpdp; 1036 /* PROBE_SUPPORT end */ 1037 caddr32_t ul_siglink; /* pointer to previous context */ 1038 uint_t ul_spin_lock_spin; /* spin lock statistics */ 1039 uint_t ul_spin_lock_spin2; 1040 uint_t ul_spin_lock_sleep; 1041 uint_t ul_spin_lock_wakeup; 1042 queue_root32_t ul_queue_root; /* root of a sleep queue */ 1043 id_t ul_rtclassid; /* real-time class id */ 1044 uint_t ul_pilocks; /* count of PI locks held */ 1045 /* the following members *must* be last in the structure */ 1046 /* they are discarded when ulwp is replaced on thr_exit() */ 1047 sigset32_t ul_sigmask; /* thread's current signal mask */ 1048 sigset32_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 1049 siginfo32_t ul_siginfo; /* deferred siginfo */ 1050 mutex_t ul_spinlock; /* used when suspending/continuing */ 1051 fpuenv32_t ul_fpuenv; /* floating point state */ 1052 caddr32_t ul_sp; /* stack pointer when blocked */ 1053 #if defined(sparc) 1054 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 1055 #endif 1056 } ulwp32_t; 1057 1058 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 1059 1060 typedef struct uberdata32 { 1061 pad_lock_t _link_lock; 1062 pad_lock_t _ld_lock; 1063 pad_lock_t _fork_lock; 1064 pad_lock_t _atfork_lock; 1065 pad32_lock_t _callout_lock; 1066 pad32_lock_t _tdb_hash_lock; 1067 tdb_sync_stats_t tdb_hash_lock_stats; 1068 siguaction32_t siguaction[NSIG]; 1069 bucket32_t bucket[NBUCKETS]; 1070 atexit_root32_t atexit_root; 1071 tsd_metadata32_t tsd_metadata; 1072 tls_metadata32_t tls_metadata; 1073 char primary_map; 1074 char bucket_init; 1075 char pad[2]; 1076 uberflags_t uberflags; 1077 caddr32_t queue_head; 1078 caddr32_t thr_hash_table; 1079 uint_t hash_size; 1080 uint_t hash_mask; 1081 caddr32_t ulwp_one; 1082 caddr32_t all_lwps; 1083 caddr32_t all_zombies; 1084 int nthreads; 1085 int nzombies; 1086 int ndaemons; 1087 int pid; 1088 caddr32_t sigacthandler; 1089 caddr32_t lwp_stacks; 1090 caddr32_t lwp_laststack; 1091 int nfreestack; 1092 int thread_stack_cache; 1093 caddr32_t ulwp_freelist; 1094 caddr32_t ulwp_lastfree; 1095 caddr32_t ulwp_replace_free; 1096 caddr32_t ulwp_replace_last; 1097 caddr32_t atforklist; 1098 caddr32_t robustlocks; 1099 caddr32_t tdb_bootstrap; 1100 tdb32_t tdb; 1101 } uberdata32_t; 1102 1103 #endif /* _SYSCALL32 */ 1104 1105 /* ul_stop values */ 1106 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1107 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1108 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1109 1110 /* 1111 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1112 */ 1113 1114 typedef struct _cvattr { 1115 int pshared; 1116 clockid_t clockid; 1117 } cvattr_t; 1118 1119 typedef struct _mattr { 1120 int pshared; 1121 int protocol; 1122 int prioceiling; 1123 int type; 1124 int robustness; 1125 } mattr_t; 1126 1127 typedef struct _thrattr { 1128 size_t stksize; 1129 void *stkaddr; 1130 int detachstate; 1131 int daemonstate; 1132 int scope; 1133 int prio; 1134 int policy; 1135 int inherit; 1136 size_t guardsize; 1137 } thrattr_t; 1138 1139 typedef struct _rwlattr { 1140 int pshared; 1141 } rwlattr_t; 1142 1143 /* _curthread() is inline for speed */ 1144 extern ulwp_t *_curthread(void); 1145 #define curthread (_curthread()) 1146 1147 /* this version (also inline) can be tested for NULL */ 1148 extern ulwp_t *__curthread(void); 1149 1150 /* get the current stack pointer (also inline) */ 1151 extern greg_t stkptr(void); 1152 1153 /* 1154 * Suppress __attribute__((...)) if we are not compiling with gcc 1155 */ 1156 #if !defined(__GNUC__) 1157 #define __attribute__(string) 1158 #endif 1159 1160 /* Fetch the dispatch (kernel) priority of a thread */ 1161 #define real_priority(ulwp) \ 1162 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0) 1163 1164 /* 1165 * Implementation functions. Not visible outside of the library itself. 1166 */ 1167 extern int __nanosleep(const timespec_t *, timespec_t *); 1168 extern void getgregs(ulwp_t *, gregset_t); 1169 extern void setgregs(ulwp_t *, gregset_t); 1170 extern void thr_panic(const char *); 1171 #pragma rarely_called(thr_panic) 1172 extern ulwp_t *find_lwp(thread_t); 1173 extern void finish_init(void); 1174 extern void update_sched(ulwp_t *); 1175 extern void queue_alloc(void); 1176 extern void tsd_exit(void); 1177 extern void tsd_free(ulwp_t *); 1178 extern void tls_setup(void); 1179 extern void tls_exit(void); 1180 extern void tls_free(ulwp_t *); 1181 extern void rwl_free(ulwp_t *); 1182 extern void heldlock_exit(void); 1183 extern void heldlock_free(ulwp_t *); 1184 extern void sigacthandler(int, siginfo_t *, void *); 1185 extern void signal_init(void); 1186 extern int sigequalset(const sigset_t *, const sigset_t *); 1187 extern void mutex_setup(void); 1188 extern void take_deferred_signal(int); 1189 extern void *setup_top_frame(void *, size_t, ulwp_t *); 1190 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1191 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1192 extern volatile sc_shared_t *setup_schedctl(void); 1193 extern void *lmalloc(size_t); 1194 extern void lfree(void *, size_t); 1195 extern void *libc_malloc(size_t); 1196 extern void *libc_realloc(void *, size_t); 1197 extern void libc_free(void *); 1198 extern char *libc_strdup(const char *); 1199 extern void ultos(uint64_t, int, char *); 1200 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1201 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1202 extern void thread_error(const char *); 1203 extern void grab_assert_lock(void); 1204 extern void dump_queue_statistics(void); 1205 extern void collect_queue_statistics(void); 1206 extern void record_spin_locks(ulwp_t *); 1207 extern void remember_lock(mutex_t *); 1208 extern void forget_lock(mutex_t *); 1209 extern void register_lock(mutex_t *); 1210 extern void unregister_locks(void); 1211 #if defined(__sparc) 1212 extern void _flush_windows(void); 1213 #else 1214 #define _flush_windows() 1215 #endif 1216 extern void set_curthread(void *); 1217 1218 /* 1219 * Utility function used when waking up many threads (more than MAXLWPS) 1220 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1221 */ 1222 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1223 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1224 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1225 1226 /* enter a critical section */ 1227 #define enter_critical(self) (self->ul_critical++) 1228 1229 /* exit a critical section, take deferred actions if necessary */ 1230 extern void do_exit_critical(void); 1231 #define exit_critical(self) \ 1232 (void) (self->ul_critical--, \ 1233 ((self->ul_curplease && self->ul_critical == 0)? \ 1234 (do_exit_critical(), 0) : 0)) 1235 1236 /* 1237 * Like enter_critical()/exit_critical() but just for deferring signals. 1238 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1239 * calling application functions like constructors and destructors. 1240 * Care must be taken if the application function attempts to set 1241 * the signal mask while a deferred signal is present; the setting 1242 * of the signal mask must also be deferred. 1243 */ 1244 #define sigoff(self) (self->ul_sigdefer++) 1245 extern void sigon(ulwp_t *); 1246 1247 /* these are exported functions */ 1248 extern void _sigoff(void); 1249 extern void _sigon(void); 1250 1251 #define sigorset(s1, s2) \ 1252 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1253 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1254 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1255 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1256 1257 #define sigandset(s1, s2) \ 1258 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1259 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1260 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1261 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1262 1263 #define sigdiffset(s1, s2) \ 1264 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1265 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1266 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1267 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1268 1269 #define delete_reserved_signals(s) \ 1270 (((s)->__sigbits[0] &= MASKSET0), \ 1271 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1272 ((s)->__sigbits[2] = 0), \ 1273 ((s)->__sigbits[3] = 0)) 1274 1275 extern void block_all_signals(ulwp_t *self); 1276 1277 /* 1278 * When restoring the signal mask after having previously called 1279 * block_all_signals(), if we have a deferred signal present then 1280 * do nothing other than ASSERT() that we are in a critical region. 1281 * The signal mask will be set when we emerge from the critical region 1282 * and call take_deferred_signal(). There is no race condition here 1283 * because the kernel currently has all signals blocked for this thread. 1284 */ 1285 #define restore_signals(self) \ 1286 ((void) ((self)->ul_cursig? \ 1287 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1288 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask, NULL))) 1289 1290 extern void set_cancel_pending_flag(ulwp_t *, int); 1291 extern void set_cancel_eintr_flag(ulwp_t *); 1292 extern void set_parking_flag(ulwp_t *, int); 1293 extern int cancel_active(void); 1294 1295 extern void *_thrp_setup(ulwp_t *); 1296 extern void _fpinherit(ulwp_t *); 1297 extern void _lwp_start(void); 1298 extern void _lwp_terminate(void); 1299 extern void lmutex_lock(mutex_t *); 1300 extern void lmutex_unlock(mutex_t *); 1301 extern void lrw_rdlock(rwlock_t *); 1302 extern void lrw_wrlock(rwlock_t *); 1303 extern void lrw_unlock(rwlock_t *); 1304 extern void sig_mutex_lock(mutex_t *); 1305 extern void sig_mutex_unlock(mutex_t *); 1306 extern int sig_mutex_trylock(mutex_t *); 1307 extern int sig_cond_wait(cond_t *, mutex_t *); 1308 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1309 extern void cancel_safe_mutex_lock(mutex_t *); 1310 extern void cancel_safe_mutex_unlock(mutex_t *); 1311 extern int cancel_safe_mutex_trylock(mutex_t *); 1312 extern void _prefork_handler(void); 1313 extern void _postfork_parent_handler(void); 1314 extern void _postfork_child_handler(void); 1315 extern void postfork1_child(void); 1316 extern void postfork1_child_aio(void); 1317 extern void postfork1_child_sigev_aio(void); 1318 extern void postfork1_child_sigev_mq(void); 1319 extern void postfork1_child_sigev_timer(void); 1320 extern void postfork1_child_tpool(void); 1321 extern void fork_lock_enter(void); 1322 extern void fork_lock_exit(void); 1323 extern void suspend_fork(void); 1324 extern void continue_fork(int); 1325 extern void do_sigcancel(void); 1326 extern void setup_cancelsig(int); 1327 extern void init_sigev_thread(void); 1328 extern void init_aio(void); 1329 extern void _cancelon(void); 1330 extern void _canceloff(void); 1331 extern void _canceloff_nocancel(void); 1332 extern void _cancel_prologue(void); 1333 extern void _cancel_epilogue(void); 1334 extern void no_preempt(ulwp_t *); 1335 extern void preempt(ulwp_t *); 1336 extern void _thrp_unwind(void *); 1337 1338 extern pid_t __forkx(int); 1339 extern pid_t __forkallx(int); 1340 extern int __open(const char *, int, ...); 1341 extern int __close(int); 1342 extern ssize_t __read(int, void *, size_t); 1343 extern ssize_t __write(int, const void *, size_t); 1344 extern int __fcntl(int, int, ...); 1345 extern int __lwp_continue(lwpid_t); 1346 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1347 extern int ___lwp_suspend(lwpid_t); 1348 extern int lwp_wait(lwpid_t, lwpid_t *); 1349 extern int __lwp_wait(lwpid_t, lwpid_t *); 1350 extern int __lwp_detach(lwpid_t); 1351 extern sc_shared_t *__schedctl(void); 1352 1353 /* actual system call traps */ 1354 extern int __setcontext(const ucontext_t *); 1355 extern int __getcontext(ucontext_t *); 1356 extern int __clock_gettime(clockid_t, timespec_t *); 1357 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1358 extern void hrt2ts(hrtime_t, timespec_t *); 1359 1360 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1361 extern int __lwp_sigmask(int, const sigset_t *, sigset_t *); 1362 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1363 extern caddr_t __sighndlrend; 1364 #pragma unknown_control_flow(__sighndlr) 1365 1366 /* belongs in <pthread.h> */ 1367 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1368 #define PTHREAD_CREATE_NONDAEMON_NP 0 1369 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1370 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1371 1372 extern int mutex_held(mutex_t *); 1373 extern int mutex_lock_internal(mutex_t *, timespec_t *, int); 1374 extern int mutex_unlock_internal(mutex_t *, int); 1375 1376 /* not cancellation points: */ 1377 extern int __cond_wait(cond_t *, mutex_t *); 1378 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1379 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1380 1381 extern int rw_read_held(rwlock_t *); 1382 extern int rw_write_held(rwlock_t *); 1383 1384 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1385 thread_t *, size_t); 1386 extern int _thrp_suspend(thread_t, uchar_t); 1387 extern int _thrp_continue(thread_t, uchar_t); 1388 1389 extern void _thrp_terminate(void *); 1390 extern void _thrp_exit(void); 1391 1392 extern const pcclass_t *get_info_by_class(id_t); 1393 extern const pcclass_t *get_info_by_policy(int); 1394 extern const thrattr_t *def_thrattr(void); 1395 extern id_t setparam(idtype_t, id_t, int, int); 1396 extern id_t setprio(idtype_t, id_t, int, int *); 1397 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *); 1398 1399 /* 1400 * System call wrappers (direct interfaces to the kernel) 1401 */ 1402 extern int ___lwp_mutex_register(mutex_t *); 1403 extern int ___lwp_mutex_trylock(mutex_t *); 1404 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *); 1405 extern int ___lwp_mutex_unlock(mutex_t *); 1406 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1407 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1408 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1409 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1410 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1411 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1412 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1413 extern int __lwp_rwlock_unlock(rwlock_t *); 1414 extern int __lwp_park(timespec_t *, lwpid_t); 1415 extern int __lwp_unpark(lwpid_t); 1416 extern int __lwp_unpark_all(lwpid_t *, int); 1417 #if defined(__x86) 1418 extern int ___lwp_private(int, int, void *); 1419 #endif /* __x86 */ 1420 1421 /* 1422 * inlines 1423 */ 1424 extern int set_lock_byte(volatile uint8_t *); 1425 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1426 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1427 extern void atomic_inc_32(volatile uint32_t *); 1428 extern void atomic_dec_32(volatile uint32_t *); 1429 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1430 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1431 #if defined(__sparc) 1432 extern ulong_t caller(void); 1433 extern ulong_t getfp(void); 1434 #endif /* __sparc */ 1435 1436 #include "thr_inlines.h" 1437 1438 #endif /* _THR_UBERDATA_H */ 1439