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 (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* 27 * Copyright 2016 Joyent, Inc. 28 * Copyright 2018 Nexenta Systems, Inc. 29 */ 30 31 #ifndef _THR_UBERDATA_H 32 #define _THR_UBERDATA_H 33 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <sys/types.h> 37 #include <fcntl.h> 38 #include <string.h> 39 #include <signal.h> 40 #include <ucontext.h> 41 #include <thread.h> 42 #include <pthread.h> 43 #include <atomic.h> 44 #include <link.h> 45 #include <sys/resource.h> 46 #include <sys/lwp.h> 47 #include <errno.h> 48 #include <sys/asm_linkage.h> 49 #include <sys/regset.h> 50 #include <sys/fcntl.h> 51 #include <sys/mman.h> 52 #include <synch.h> 53 #include <door.h> 54 #include <limits.h> 55 #include <sys/synch32.h> 56 #include <schedctl.h> 57 #include <sys/priocntl.h> 58 #include <thread_db.h> 59 #include <setjmp.h> 60 #include <sys/thread.h> 61 #include <sys/debug.h> 62 #include "libc_int.h" 63 #include "tdb_agent.h" 64 65 /* 66 * This is an implementation-specific include file for threading support. 67 * It is not to be seen by the clients of the library. 68 * 69 * This file also describes uberdata in libc. 70 * 71 * The term "uberdata" refers to data that is unique and visible across 72 * all link maps. The name is meant to imply that such data is truly 73 * global, not just locally global to a particular link map. 74 * 75 * See the Linker and Libraries Guide for a full description of alternate 76 * link maps and how they are set up and used. 77 * 78 * Alternate link maps implement multiple global namespaces within a single 79 * process. There may be multiple instances of identical dynamic libraries 80 * loaded in a process's address space at the same time, each on a different 81 * link map (as determined by the dynamic linker), each with its own set of 82 * global variables. Which particular instance of a global variable is seen 83 * by a thread running in the process is determined by the link map on which 84 * the thread happens to be executing at the time. 85 * 86 * However, there are aspects of a process that are unique across all 87 * link maps, in particular the structures used to implement threads 88 * of control (in Sparc terminology, there is only one %g7 regardless 89 * of the link map on which the thread is executing). 90 * 91 * All uberdata is referenced from a base pointer in the thread's ulwp_t 92 * structure (which is also uberdata). All allocations and deallocations 93 * of uberdata are made via the uberdata-aware lmalloc() and lfree() 94 * interfaces (malloc() and free() are simply locally-global). 95 */ 96 97 /* 98 * Special libc-private access to errno. 99 * We do this so that references to errno do not invoke the dynamic linker. 100 */ 101 #undef errno 102 #define errno (*curthread->ul_errnop) 103 104 /* 105 * See <sys/synch32.h> for the reasons for these values 106 * and why they are different for sparc and intel. 107 */ 108 #if defined(__sparc) 109 110 /* lock.lock64.pad[x] 4 5 6 7 */ 111 #define LOCKMASK 0xff000000 112 #define WAITERMASK 0x000000ff 113 #define SPINNERMASK 0x00ff0000 114 #define SPINNERSHIFT 16 115 #define WAITER 0x00000001 116 #define LOCKSET 0xff 117 #define LOCKCLEAR 0 118 119 #define PIDSHIFT 32 120 #define LOCKMASK64 0xffffffffff000000ULL 121 #define LOCKBYTE64 0x00000000ff000000ULL 122 #define WAITERMASK64 0x00000000000000ffULL 123 #define SPINNERMASK64 0x0000000000ff0000ULL 124 125 #elif defined(__x86) 126 127 /* lock.lock64.pad[x] 7 6 5 4 */ 128 #define LOCKMASK 0xff000000 129 #define WAITERMASK 0x00ff0000 130 #define SPINNERMASK 0x0000ff00 131 #define SPINNERSHIFT 8 132 #define WAITER 0x00010000 133 #define LOCKSET 0x01 134 #define LOCKCLEAR 0 135 136 #define PIDSHIFT 0 137 #define LOCKMASK64 0xff000000ffffffffULL 138 #define LOCKBYTE64 0x0100000000000000ULL 139 #define WAITERMASK64 0x00ff000000000000ULL 140 #define SPINNERMASK64 0x0000ff0000000000ULL 141 142 #else 143 #error "neither __sparc nor __x86 is defined" 144 #endif 145 146 /* 147 * Fetch the owner of a USYNC_THREAD mutex. 148 * Don't use this with process-shared mutexes; 149 * the owing thread may be in a different process. 150 */ 151 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 152 153 /* 154 * Test if a thread owns a process-private (USYNC_THREAD) mutex. 155 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex. 156 * The 'mp' argument must not have side-effects since it is evaluated twice. 157 */ 158 #define MUTEX_OWNED(mp, thrp) \ 159 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 160 161 162 /* 163 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 164 * collection of lock statistics by a debugger or other collecting tool. 165 * 166 * uberflags.uf_thread_error_detection is set by an environment variable: 167 * _THREAD_ERROR_DETECTION 168 * 0 == no detection of locking primitive errors. 169 * 1 == detect errors and issue a warning message. 170 * 2 == detect errors, issue a warning message, and dump core. 171 * 172 * We bundle these together in uberflags.uf_trs_ted to make a test of either 173 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 174 * 175 * uberflags.uf_mt is set non-zero when the first thread (in addition 176 * to the main thread) is created. 177 * 178 * We bundle all these flags together in uberflags.uf_all to make a test 179 * of any being non-zero a single memory reference (again, for speed). 180 */ 181 typedef union { 182 int uf_all; /* combined all flags */ 183 struct { 184 short h_pad; 185 short h_trs_ted; /* combined reg sync & error detect */ 186 } uf_h; 187 struct { 188 char x_mt; 189 char x_pad; 190 char x_tdb_register_sync; 191 char x_thread_error_detection; 192 } uf_x; 193 } uberflags_t; 194 195 #define uf_mt uf_x.x_mt 196 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 197 #define uf_thread_error_detection uf_x.x_thread_error_detection 198 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 199 200 /* 201 * NOTE WELL: 202 * To enable further optimization, the "ul_schedctl_called" member 203 * of the ulwp_t structure (below) serves double-duty: 204 * 1. If NULL, it means that the thread must call __schedctl() 205 * to set up its schedctl mappings before acquiring a mutex. 206 * This is required by the implementation of adaptive mutex locking. 207 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 208 * uberflags can be made without additional memory references. 209 * This allows the common case of _mutex_lock() and _mutex_unlock() for 210 * USYNC_THREAD mutexes with no error detection and no lock statistics 211 * to be optimized for speed. 212 */ 213 214 /* double the default stack size for 64-bit processes */ 215 #ifdef _LP64 216 #define MINSTACK (8 * 1024) 217 #define DEFAULTSTACK (2 * 1024 * 1024) 218 #else 219 #define MINSTACK (4 * 1024) 220 #define DEFAULTSTACK (1024 * 1024) 221 #endif 222 223 #define MUTEX_TRY 0 224 #define MUTEX_LOCK 1 225 #define MUTEX_NOCEIL 0x40 226 227 #if defined(__x86) 228 229 typedef struct { /* structure returned by fnstenv */ 230 int fctrl; /* control word */ 231 int fstat; /* status word (flags, etc) */ 232 int ftag; /* tag of which regs busy */ 233 int misc[4]; /* other stuff, 28 bytes total */ 234 } fpuenv_t; 235 236 #ifdef _SYSCALL32 237 typedef fpuenv_t fpuenv32_t; 238 #endif /* _SYSCALL32 */ 239 240 #elif defined(__sparc) 241 242 typedef struct { /* fp state structure */ 243 greg_t fsr; 244 greg_t fpu_en; 245 } fpuenv_t; 246 247 #ifdef _SYSCALL32 248 typedef struct { 249 greg32_t fsr; 250 greg32_t fpu_en; 251 } fpuenv32_t; 252 #endif /* _SYSCALL32 */ 253 254 #endif /* __x86 */ 255 256 #if defined(__x86) 257 extern void ht_pause(void); /* "pause" instruction */ 258 #define SMT_PAUSE() ht_pause() 259 #elif defined(SMT_PAUSE_FUNCTION) 260 extern void SMT_PAUSE_FUNCTION(void); 261 #define SMT_PAUSE() SMT_PAUSE_FUNCTION() 262 #else 263 #define SMT_PAUSE() smt_pause() 264 #endif /* __x86 */ 265 266 /* 267 * Cleanup handler related data. 268 * This structure is exported as _cleanup_t in pthread.h. 269 * pthread.h exports only the size of this structure, so check 270 * _cleanup_t in pthread.h before making any change here. 271 */ 272 typedef struct __cleanup { 273 struct __cleanup *next; /* pointer to next handler */ 274 caddr_t fp; /* current frame pointer */ 275 void (*func)(void *); /* cleanup handler address */ 276 void *arg; /* handler's argument */ 277 } __cleanup_t; 278 279 /* 280 * Thread-Specific Data (TSD) 281 * TSD_NFAST includes the invalid key zero, so there 282 * are really only (TSD_NFAST - 1) fast key slots. 283 */ 284 typedef void (*PFrV)(void *); 285 #define TSD_UNALLOCATED ((PFrV)1) 286 #define TSD_NFAST 9 287 288 /* 289 * The tsd union is designed to burn a little memory (9 words) to make 290 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 291 * end of the pad region to increase the likelihood that it falls on the 292 * same cache line as the data. 293 */ 294 typedef union tsd { 295 uint_t tsd_nalloc; /* Amount of allocated storage */ 296 void *tsd_pad[TSD_NFAST]; 297 void *tsd_data[1]; 298 } tsd_t; 299 300 typedef struct { 301 mutex_t tsdm_lock; /* Lock protecting the data */ 302 uint_t tsdm_nkeys; /* Number of allocated keys */ 303 uint_t tsdm_nused; /* Number of used keys */ 304 PFrV *tsdm_destro; /* Per-key destructors */ 305 char tsdm_pad[64 - /* pad to 64 bytes */ 306 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 307 } tsd_metadata_t; 308 309 #ifdef _SYSCALL32 310 typedef union tsd32 { 311 uint_t tsd_nalloc; /* Amount of allocated storage */ 312 caddr32_t tsd_pad[TSD_NFAST]; 313 caddr32_t tsd_data[1]; 314 } tsd32_t; 315 316 typedef struct { 317 mutex_t tsdm_lock; /* Lock protecting the data */ 318 uint_t tsdm_nkeys; /* Number of allocated keys */ 319 uint_t tsdm_nused; /* Number of used keys */ 320 caddr32_t tsdm_destro; /* Per-key destructors */ 321 char tsdm_pad[64 - /* pad to 64 bytes */ 322 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 323 } tsd_metadata32_t; 324 #endif /* _SYSCALL32 */ 325 326 327 /* 328 * Thread-Local Storage (TLS) 329 */ 330 typedef struct { 331 void *tls_data; 332 size_t tls_size; 333 } tls_t; 334 335 typedef struct { 336 mutex_t tls_lock; /* Lock protecting the data */ 337 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 338 tls_t static_tls; /* Template for static TLS */ 339 char tls_pad[64 - /* pad to 64 bytes */ 340 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 341 } tls_metadata_t; 342 343 #ifdef _SYSCALL32 344 typedef struct { 345 caddr32_t tls_data; 346 size32_t tls_size; 347 } tls32_t; 348 349 typedef struct { 350 mutex_t tls_lock; /* Lock protecting the data */ 351 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 352 tls32_t static_tls; /* Template for static TLS */ 353 char tls_pad[64 - /* pad to 64 bytes */ 354 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 355 } tls_metadata32_t; 356 #endif /* _SYSCALL32 */ 357 358 359 /* 360 * Sleep queue root for USYNC_THREAD condvars and mutexes. 361 * There is a default queue root for each queue head (see below). 362 * Also, each ulwp_t contains a queue root that can be used 363 * when the thread is enqueued on the queue, if necessary 364 * (when more than one wchan hashes to the same queue head). 365 */ 366 typedef struct queue_root { 367 struct queue_root *qr_next; 368 struct queue_root *qr_prev; 369 struct ulwp *qr_head; 370 struct ulwp *qr_tail; 371 void *qr_wchan; 372 uint32_t qr_rtcount; 373 uint32_t qr_qlen; 374 uint32_t qr_qmax; 375 } queue_root_t; 376 377 #ifdef _SYSCALL32 378 typedef struct queue_root32 { 379 caddr32_t qr_next; 380 caddr32_t qr_prev; 381 caddr32_t qr_head; 382 caddr32_t qr_tail; 383 caddr32_t qr_wchan; 384 uint32_t qr_rtcount; 385 uint32_t qr_qlen; 386 uint32_t qr_qmax; 387 } queue_root32_t; 388 #endif 389 390 /* 391 * Sleep queue heads for USYNC_THREAD condvars and mutexes. 392 * The size and alignment is 128 bytes to reduce cache conflicts. 393 * Each queue head points to a list of queue roots, defined above. 394 * Each queue head contains a default queue root for use when only one 395 * is needed. It is always at the tail of the queue root hash chain. 396 */ 397 typedef union { 398 uint64_t qh_64[16]; 399 struct { 400 mutex_t q_lock; 401 uint8_t q_qcnt; 402 uint8_t q_type; /* MX or CV */ 403 uint8_t q_pad1[2]; 404 uint32_t q_lockcount; 405 uint32_t q_qlen; 406 uint32_t q_qmax; 407 void *q_wchan; /* valid only while locked */ 408 struct queue_root *q_root; /* valid only while locked */ 409 struct queue_root *q_hlist; 410 #if !defined(_LP64) 411 caddr_t q_pad2[3]; 412 #endif 413 queue_root_t q_def_root; 414 uint32_t q_hlen; 415 uint32_t q_hmax; 416 } qh_qh; 417 } queue_head_t; 418 419 #define qh_lock qh_qh.q_lock 420 #define qh_qcnt qh_qh.q_qcnt 421 #define qh_type qh_qh.q_type 422 #if defined(DEBUG) 423 #define qh_lockcount qh_qh.q_lockcount 424 #define qh_qlen qh_qh.q_qlen 425 #define qh_qmax qh_qh.q_qmax 426 #endif 427 #define qh_wchan qh_qh.q_wchan 428 #define qh_root qh_qh.q_root 429 #define qh_hlist qh_qh.q_hlist 430 #define qh_def_root qh_qh.q_def_root 431 #define qh_hlen qh_qh.q_hlen 432 #define qh_hmax qh_qh.q_hmax 433 434 /* queue types passed to queue_lock() */ 435 #define MX 0 436 #define CV 1 437 #define QHASHSHIFT 9 /* number of hashing bits */ 438 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */ 439 #define QUEUE_HASH(wchan, type) ((uint_t) \ 440 ((((uintptr_t)(wchan) >> 3) \ 441 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \ 442 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 443 444 extern queue_head_t *queue_lock(void *, int); 445 extern void queue_unlock(queue_head_t *); 446 extern void enqueue(queue_head_t *, struct ulwp *, int); 447 extern struct ulwp *dequeue(queue_head_t *, int *); 448 extern struct ulwp **queue_slot(queue_head_t *, struct ulwp **, int *); 449 extern struct ulwp *queue_waiter(queue_head_t *); 450 extern int dequeue_self(queue_head_t *); 451 extern void queue_unlink(queue_head_t *, 452 struct ulwp **, struct ulwp *); 453 extern void unsleep_self(void); 454 extern void spin_lock_set(mutex_t *); 455 extern void spin_lock_clear(mutex_t *); 456 457 /* 458 * Scheduling class information structure. 459 */ 460 typedef struct { 461 short pcc_state; 462 short pcc_policy; 463 pri_t pcc_primin; 464 pri_t pcc_primax; 465 pcinfo_t pcc_info; 466 } pcclass_t; 467 468 /* 469 * Memory block for chain of owned ceiling mutexes. 470 */ 471 typedef struct mxchain { 472 struct mxchain *mxchain_next; 473 mutex_t *mxchain_mx; 474 } mxchain_t; 475 476 /* 477 * Pointer to an rwlock that is held for reading. 478 * Used in rw_rdlock() to allow a thread that already holds a read 479 * lock to acquire another read lock on the same rwlock even if 480 * there are writers waiting. This to avoid deadlock when acquiring 481 * a read lock more than once in the presence of pending writers. 482 * POSIX mandates this behavior. 483 */ 484 typedef struct { 485 void *rd_rwlock; /* the rwlock held for reading */ 486 size_t rd_count; /* count of read locks applied */ 487 } readlock_t; 488 489 #ifdef _SYSCALL32 490 typedef struct { 491 caddr32_t rd_rwlock; 492 size32_t rd_count; 493 } readlock32_t; 494 #endif /* _SYSCALL32 */ 495 496 /* 497 * As part of per-thread caching libumem (ptcumem), we add a small amount to the 498 * thread's uberdata to facilitate it. The tm_roots are the roots of linked 499 * lists which is used by libumem to chain together allocations. tm_size is used 500 * to track the total amount of data stored across those linked lists. For more 501 * information, see libumem's big theory statement. 502 */ 503 #define NTMEMBASE 16 504 505 typedef struct { 506 size_t tm_size; 507 void *tm_roots[NTMEMBASE]; 508 } tumem_t; 509 510 #ifdef _SYSCALL32 511 typedef struct { 512 uint32_t tm_size; 513 caddr32_t tm_roots[NTMEMBASE]; 514 } tumem32_t; 515 #endif 516 517 typedef void (*tmem_func_t)(void *, int); 518 519 /* 520 * Maximum number of read locks allowed for one thread on one rwlock. 521 * This could be as large as INT_MAX, but the SUSV3 test suite would 522 * take an inordinately long time to complete. This is big enough. 523 */ 524 #define READ_LOCK_MAX 100000 525 526 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 527 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 528 529 /* 530 * Round up an integral value to a multiple of 64 531 */ 532 #define roundup64(x) (-(-(x) & -64)) 533 534 /* 535 * NOTE: Whatever changes are made to ulwp_t must be 536 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 537 * 538 * NOTE: ulwp32_t (defined later in this file) should be kept in sync 539 * with ulwp_t 540 * 541 * NOTE: ul_self *must* be the first member of ulwp_t on x86 542 * Low-level x86 code relies on this. 543 */ 544 typedef struct ulwp { 545 /* 546 * These members always need to come first on sparc. 547 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 548 */ 549 #if defined(__sparc) 550 uint32_t ul_dinstr; /* scratch space for dtrace */ 551 uint32_t ul_padsparc0[15]; 552 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 553 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 554 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 555 uint32_t ul_dreturn; /* dtrace: return %o0 */ 556 #endif 557 struct ulwp *ul_self; /* pointer to self */ 558 #if defined(__i386) 559 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 560 #elif defined(__amd64) 561 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 562 #endif 563 struct uberdata *ul_uberdata; /* uber (super-global) data */ 564 tls_t ul_tls; /* dynamic thread-local storage base */ 565 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 566 struct ulwp *ul_back; /* protected by link_lock */ 567 struct ulwp *ul_next; /* list to keep track of stacks */ 568 struct ulwp *ul_hash; /* hash chain linked list */ 569 void *ul_rval; /* return value from thr_exit() */ 570 caddr_t ul_stk; /* mapping base of the stack */ 571 size_t ul_mapsiz; /* mapping size of the stack */ 572 size_t ul_guardsize; /* normally _lpagesize */ 573 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 574 size_t ul_stksiz; /* broken thr_stksegment() interface */ 575 stack_t ul_ustack; /* current stack boundaries */ 576 int ul_ix; /* hash index */ 577 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 578 pri_t ul_pri; /* scheduling priority */ 579 pri_t ul_epri; /* real-time ceiling priority */ 580 char ul_policy; /* scheduling policy */ 581 char ul_cid; /* scheduling class id */ 582 union { 583 struct { 584 char cursig; /* deferred signal number */ 585 char pleasestop; /* lwp requested to stop itself */ 586 } s; 587 short curplease; /* for testing both at once */ 588 } ul_cp; 589 char ul_stop; /* reason for stopping */ 590 char ul_signalled; /* this lwp was cond_signal()d */ 591 char ul_dead; /* this lwp has called thr_exit */ 592 char ul_unwind; /* posix: unwind C++ stack */ 593 char ul_detached; /* THR_DETACHED at thread_create() */ 594 /* or pthread_detach() was called */ 595 char ul_writer; /* sleeping in rw_wrlock() */ 596 char ul_stopping; /* set by curthread: stopping self */ 597 char ul_cancel_prologue; /* for _cancel_prologue() */ 598 short ul_preempt; /* no_preempt()/preempt() */ 599 short ul_savpreempt; /* pre-existing preempt value */ 600 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 601 char ul_main; /* thread is the main thread */ 602 char ul_fork; /* thread is performing a fork */ 603 char ul_primarymap; /* primary link-map is initialized */ 604 /* per-thread copies of the corresponding global variables */ 605 uint8_t ul_max_spinners; /* thread_max_spinners */ 606 char ul_door_noreserve; /* thread_door_noreserve */ 607 char ul_queue_fifo; /* thread_queue_fifo */ 608 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 609 char ul_error_detection; /* thread_error_detection */ 610 char ul_async_safe; /* thread_async_safe */ 611 char ul_rt; /* found on an RT queue */ 612 char ul_rtqueued; /* was RT when queued */ 613 char ul_misaligned; /* thread_locks_misaligned */ 614 char ul_pad[3]; 615 int ul_adaptive_spin; /* thread_adaptive_spin */ 616 int ul_queue_spin; /* thread_queue_spin */ 617 volatile int ul_critical; /* non-zero == in a critical region */ 618 int ul_sigdefer; /* non-zero == defer signals */ 619 int ul_vfork; /* thread is the child of vfork() */ 620 int ul_cancelable; /* _cancelon()/_canceloff() */ 621 char ul_cancel_pending; /* pthread_cancel() was called */ 622 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 623 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 624 char ul_save_async; /* saved copy of ul_cancel_async */ 625 char ul_mutator; /* lwp is a mutator (java interface) */ 626 char ul_created; /* created suspended */ 627 char ul_replace; /* replacement; must be free()d */ 628 uchar_t ul_nocancel; /* cancellation can't happen */ 629 int ul_errno; /* per-thread errno */ 630 int *ul_errnop; /* pointer to errno or self->ul_errno */ 631 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 632 uberflags_t *ul_schedctl_called; /* ul_schedctl is set up */ 633 volatile sc_shared_t *ul_schedctl; /* schedctl data */ 634 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 635 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 636 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 637 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 638 td_evbuf_t ul_td_evbuf; /* event buffer */ 639 char ul_td_events_enable; /* event mechanism enabled */ 640 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 641 char ul_qtype; /* MX or CV */ 642 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 643 int ul_rtld; /* thread is running inside ld.so.1 */ 644 int ul_usropts; /* flags given to thr_create() */ 645 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 646 void *ul_startarg; /* argument for start function */ 647 void *ul_wchan; /* synch object when sleeping */ 648 struct ulwp *ul_link; /* sleep queue link */ 649 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 650 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 651 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 652 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 653 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 654 /* 0 means there is but a single entry */ 655 union { /* single entry or pointer to array */ 656 readlock_t single; 657 readlock_t *array; 658 } ul_readlock; 659 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 660 /* 0 means there is but a single entry */ 661 union { /* single entry or pointer to array */ 662 mutex_t *single; 663 mutex_t **array; 664 } ul_heldlocks; 665 /* PROBE_SUPPORT begin */ 666 void *ul_tpdp; 667 /* PROBE_SUPPORT end */ 668 ucontext_t *ul_siglink; /* pointer to previous context */ 669 uint_t ul_spin_lock_spin; /* spin lock statistics */ 670 uint_t ul_spin_lock_spin2; 671 uint_t ul_spin_lock_sleep; 672 uint_t ul_spin_lock_wakeup; 673 queue_root_t ul_queue_root; /* root of a sleep queue */ 674 id_t ul_rtclassid; /* real-time class id */ 675 uint_t ul_pilocks; /* count of PI locks held */ 676 /* the following members *must* be last in the structure */ 677 /* they are discarded when ulwp is replaced on thr_exit() */ 678 sigset_t ul_sigmask; /* thread's current signal mask */ 679 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 680 siginfo_t ul_siginfo; /* deferred siginfo */ 681 mutex_t ul_spinlock; /* used when suspending/continuing */ 682 fpuenv_t ul_fpuenv; /* floating point state */ 683 uintptr_t ul_sp; /* stack pointer when blocked */ 684 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 685 #if defined(sparc) 686 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 687 #endif 688 tumem_t ul_tmem; /* used only by umem */ 689 uint_t ul_ptinherit; /* pthreads sched inherit value */ 690 char ul_ntoabuf[18]; /* thread-specific inet_ntoa buffer */ 691 } ulwp_t; 692 693 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 694 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 695 #define ul_curplease ul_cp.curplease /* for testing both at once */ 696 697 /* 698 * This is the size of a replacement ulwp, retained only for the benefit 699 * of thr_join(). The trailing members are unneeded for this purpose. 700 */ 701 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 702 703 /* 704 * Definitions for static initialization of signal sets, 705 * plus some sneaky optimizations in various places. 706 */ 707 708 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 709 710 #if (MAXSIG > (2 * 32) && MAXSIG <= (3 * 32)) 711 #define FILLSET0 0xffffffffu 712 #define FILLSET1 0xffffffffu 713 #define FILLSET2 ((1u << (MAXSIG - 64)) - 1) 714 #define FILLSET3 0 715 #else 716 #error "fix me: MAXSIG out of bounds" 717 #endif 718 719 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 720 #define CANTMASK1 0 721 #define CANTMASK2 0 722 #define CANTMASK3 0 723 724 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 725 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 726 #define MASKSET2 (FILLSET2 & ~CANTMASK2) 727 #define MASKSET3 (FILLSET3 & ~CANTMASK3) 728 729 extern const sigset_t maskset; /* set of all maskable signals */ 730 731 extern int thread_adaptive_spin; 732 extern uint_t thread_max_spinners; 733 extern int thread_queue_spin; 734 extern int thread_queue_fifo; 735 extern int thread_queue_dump; 736 extern int thread_cond_wait_defer; 737 extern int thread_async_safe; 738 extern int thread_queue_verify; 739 740 /* 741 * pthread_atfork() related data, used to store atfork handlers. 742 */ 743 typedef struct atfork { 744 struct atfork *forw; /* forward pointer */ 745 struct atfork *back; /* backward pointer */ 746 void (*prepare)(void); /* pre-fork handler */ 747 void (*parent)(void); /* post-fork parent handler */ 748 void (*child)(void); /* post-fork child handler */ 749 } atfork_t; 750 751 /* 752 * Element in the table and in the list of registered process 753 * robust locks. We keep track of these to make sure that we 754 * only call ___lwp_mutex_register() once for each such lock 755 * after it is first mapped in (or newly mapped in). 756 */ 757 typedef struct robust { 758 struct robust *robust_next; /* hash table list */ 759 struct robust *robust_list; /* global list */ 760 mutex_t *robust_lock; 761 } robust_t; 762 763 /* 764 * Invalid address, used to mark an unused element in the hash table. 765 */ 766 #define INVALID_ADDR ((void *)(uintptr_t)(-1L)) 767 768 /* 769 * Parameters of the lock registration hash table. 770 */ 771 #define LOCKSHIFT 15 /* number of hashing bits */ 772 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<15 == 32K) */ 773 #define LOCK_HASH(addr) (uint_t) \ 774 ((((uintptr_t)(addr) >> 3) \ 775 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 776 & (LOCKHASHSZ - 1)) 777 778 /* 779 * Make our hot locks reside on private cache lines (64 bytes). 780 */ 781 typedef struct { 782 mutex_t pad_lock; 783 char pad_pad[64 - sizeof (mutex_t)]; 784 } pad_lock_t; 785 786 /* 787 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 788 */ 789 typedef struct { 790 mutex_t pad_lock; 791 char pad_pad[32 - sizeof (mutex_t)]; 792 } pad32_lock_t; 793 794 /* 795 * The threads hash table is used for fast lookup and locking of an active 796 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 797 * thr_hash_table_t structures, where N == 1 before the main thread creates 798 * the first additional thread and N == 1024 afterwards. Each element of the 799 * table is 64 bytes in size and alignment to reduce cache conflicts. 800 */ 801 typedef struct { 802 mutex_t hash_lock; /* lock per bucket */ 803 cond_t hash_cond; /* convar per bucket */ 804 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 805 char hash_pad[64 - /* pad out to 64 bytes */ 806 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 807 } thr_hash_table_t; 808 809 #ifdef _SYSCALL32 810 typedef struct { 811 mutex_t hash_lock; 812 cond_t hash_cond; 813 caddr32_t hash_bucket; 814 char hash_pad[64 - 815 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 816 } thr_hash_table32_t; 817 #endif /* _SYSCALL32 */ 818 819 820 /* 821 * siguaction members have 128-byte size and 64-byte alignment. 822 * We know that sizeof (struct sigaction) is 32 bytes for both 823 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 824 */ 825 typedef struct { 826 rwlock_t sig_lock; 827 struct sigaction sig_uaction; 828 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 829 } siguaction_t; 830 831 #ifdef _SYSCALL32 832 typedef struct { 833 rwlock_t sig_lock; 834 struct sigaction32 sig_uaction; 835 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 836 } siguaction32_t; 837 #endif /* _SYSCALL32 */ 838 839 840 /* 841 * Bucket structures, used by lmalloc()/lfree(). 842 * See port/threads/alloc.c for details. 843 * A bucket's size and alignment is 64 bytes. 844 */ 845 typedef struct { 846 mutex_t bucket_lock; /* protects the free list allocations */ 847 void *free_list; /* LIFO list of blocks to allocate/free */ 848 size_t chunks; /* number of 64K blocks mmap()ed last time */ 849 char pad64[64 - /* pad out to 64 bytes */ 850 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 851 } bucket_t; 852 853 #ifdef _SYSCALL32 854 typedef struct { 855 mutex_t bucket_lock; 856 caddr32_t free_list; 857 size32_t chunks; 858 char pad64[64 - /* pad out to 64 bytes */ 859 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 860 } bucket32_t; 861 #endif /* _SYSCALL32 */ 862 863 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 864 865 866 /* 867 * atexit() data structures. 868 * See port/gen/atexit.c for details. 869 */ 870 typedef void (*_exithdlr_func_t) (void*); 871 872 typedef struct _exthdlr { 873 struct _exthdlr *next; /* next in handler list */ 874 _exithdlr_func_t hdlr; /* handler itself */ 875 void *arg; /* argument to handler */ 876 void *dso; /* DSO associated with handler */ 877 } _exthdlr_t; 878 879 typedef struct { 880 mutex_t exitfns_lock; 881 _exthdlr_t *head; 882 /* 883 * exit_frame_monitor is part of a private contract between libc and 884 * the Sun C++ runtime. 885 * 886 * It should be NULL until exit() is called, and thereafter hold the 887 * frame pointer of the function implementing our exit processing. 888 */ 889 void *exit_frame_monitor; 890 char exit_pad[64 - /* pad out to 64 bytes */ 891 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 892 } atexit_root_t; 893 894 #ifdef _SYSCALL32 895 typedef struct { 896 mutex_t exitfns_lock; 897 caddr32_t head; 898 caddr32_t exit_frame_monitor; 899 char exit_pad[64 - /* pad out to 64 bytes */ 900 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 901 } atexit_root32_t; 902 #endif /* _SYSCALL32 */ 903 904 /* 905 * at_quick_exit() and quick_exit() data structures. The ISO/IEC C11 odd 906 * siblings of atexit() 907 */ 908 typedef void (*_quick_exithdlr_func_t)(void); 909 910 typedef struct _qexthdlr { 911 struct _qexthdlr *next; /* next in handler list */ 912 _quick_exithdlr_func_t hdlr; /* handler itself */ 913 } _qexthdlr_t; 914 915 /* 916 * We add a pad on 32-bit systems to allow us to always have the structure size 917 * be 32-bytes which helps us deal with the compiler's alignment when building 918 * in ILP32 / LP64 systems. 919 */ 920 typedef struct { 921 mutex_t exitfns_lock; 922 _qexthdlr_t *head; 923 #if !defined(_LP64) 924 uint32_t pad; 925 #endif 926 } quickexit_root_t; 927 928 #ifdef _SYSCALL32 929 typedef struct { 930 mutex_t exitfns_lock; 931 caddr32_t head; 932 uint32_t pad; 933 } quickexit_root32_t; 934 #endif /* _SYSCALL32 */ 935 936 /* 937 * This is data that is global to all link maps (uberdata, aka super-global). 938 * Note: When changing this, please be sure to keep the 32-bit variant of 939 * this in sync. (see uberdata32_t below) 940 */ 941 typedef struct uberdata { 942 pad_lock_t _link_lock; 943 pad_lock_t _ld_lock; 944 pad_lock_t _fork_lock; 945 pad_lock_t _atfork_lock; 946 pad32_lock_t _callout_lock; 947 pad32_lock_t _tdb_hash_lock; 948 tdb_sync_stats_t tdb_hash_lock_stats; 949 siguaction_t siguaction[NSIG]; 950 bucket_t bucket[NBUCKETS]; 951 atexit_root_t atexit_root; 952 quickexit_root_t quickexit_root; 953 tsd_metadata_t tsd_metadata; 954 tls_metadata_t tls_metadata; 955 /* 956 * Every object before this point has size and alignment of 64 bytes. 957 * Don't add any other type of data before this point. 958 */ 959 char primary_map; /* set when primary link map is initialized */ 960 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 961 char pad[2]; 962 uberflags_t uberflags; 963 queue_head_t *queue_head; 964 thr_hash_table_t *thr_hash_table; 965 uint_t hash_size; /* # of entries in thr_hash_table[] */ 966 uint_t hash_mask; /* hash_size - 1 */ 967 ulwp_t *ulwp_one; /* main thread */ 968 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 969 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 970 int nthreads; /* total number of live threads/lwps */ 971 int nzombies; /* total number of zombie threads */ 972 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 973 pid_t pid; /* the current process's pid */ 974 void (*sigacthandler)(int, siginfo_t *, void *); 975 ulwp_t *lwp_stacks; 976 ulwp_t *lwp_laststack; 977 int nfreestack; 978 int thread_stack_cache; 979 ulwp_t *ulwp_freelist; 980 ulwp_t *ulwp_lastfree; 981 ulwp_t *ulwp_replace_free; 982 ulwp_t *ulwp_replace_last; 983 atfork_t *atforklist; /* circular Q for fork handlers */ 984 robust_t **robustlocks; /* table of registered robust locks */ 985 robust_t *robustlist; /* list of registered robust locks */ 986 char *progname; /* the basename of the program, from argv[0] */ 987 void *ub_comm_page; /* arch-specific comm page of kernel data */ 988 struct uberdata **tdb_bootstrap; 989 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 990 } uberdata_t; 991 992 #define link_lock _link_lock.pad_lock 993 #define ld_lock _ld_lock.pad_lock 994 #define fork_lock _fork_lock.pad_lock 995 #define atfork_lock _atfork_lock.pad_lock 996 #define callout_lock _callout_lock.pad_lock 997 #define tdb_hash_lock _tdb_hash_lock.pad_lock 998 999 #pragma align 64(__uberdata) 1000 extern uberdata_t __uberdata; 1001 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 1002 extern int primary_link_map; 1003 1004 #define ulwp_mutex(ulwp, udp) \ 1005 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 1006 #define ulwp_condvar(ulwp, udp) \ 1007 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 1008 1009 /* 1010 * Grab and release the hash table lock for the specified lwp. 1011 */ 1012 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 1013 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 1014 1015 #ifdef _SYSCALL32 /* needed by libc_db */ 1016 1017 typedef struct ulwp32 { 1018 #if defined(__sparc) 1019 uint32_t ul_dinstr; /* scratch space for dtrace */ 1020 uint32_t ul_padsparc0[15]; 1021 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 1022 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 1023 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 1024 uint32_t ul_dreturn; /* dtrace: return %o0 */ 1025 #endif 1026 caddr32_t ul_self; /* pointer to self */ 1027 #if defined(__x86) 1028 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 1029 #endif 1030 caddr32_t ul_uberdata; /* uber (super-global) data */ 1031 tls32_t ul_tls; /* dynamic thread-local storage base */ 1032 caddr32_t ul_forw; /* forw, back all_lwps list, */ 1033 caddr32_t ul_back; /* protected by link_lock */ 1034 caddr32_t ul_next; /* list to keep track of stacks */ 1035 caddr32_t ul_hash; /* hash chain linked list */ 1036 caddr32_t ul_rval; /* return value from thr_exit() */ 1037 caddr32_t ul_stk; /* mapping base of the stack */ 1038 size32_t ul_mapsiz; /* mapping size of the stack */ 1039 size32_t ul_guardsize; /* normally _lpagesize */ 1040 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 1041 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 1042 stack32_t ul_ustack; /* current stack boundaries */ 1043 int ul_ix; /* hash index */ 1044 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 1045 pri_t ul_pri; /* scheduling priority */ 1046 pri_t ul_epri; /* real-time ceiling priority */ 1047 char ul_policy; /* scheduling policy */ 1048 char ul_cid; /* scheduling class id */ 1049 union { 1050 struct { 1051 char cursig; /* deferred signal number */ 1052 char pleasestop; /* lwp requested to stop itself */ 1053 } s; 1054 short curplease; /* for testing both at once */ 1055 } ul_cp; 1056 char ul_stop; /* reason for stopping */ 1057 char ul_signalled; /* this lwp was cond_signal()d */ 1058 char ul_dead; /* this lwp has called thr_exit */ 1059 char ul_unwind; /* posix: unwind C++ stack */ 1060 char ul_detached; /* THR_DETACHED at thread_create() */ 1061 /* or pthread_detach() was called */ 1062 char ul_writer; /* sleeping in rw_wrlock() */ 1063 char ul_stopping; /* set by curthread: stopping self */ 1064 char ul_cancel_prologue; /* for _cancel_prologue() */ 1065 short ul_preempt; /* no_preempt()/preempt() */ 1066 short ul_savpreempt; /* pre-existing preempt value */ 1067 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 1068 char ul_main; /* thread is the main thread */ 1069 char ul_fork; /* thread is performing a fork */ 1070 char ul_primarymap; /* primary link-map is initialized */ 1071 /* per-thread copies of the corresponding global variables */ 1072 uint8_t ul_max_spinners; /* thread_max_spinners */ 1073 char ul_door_noreserve; /* thread_door_noreserve */ 1074 char ul_queue_fifo; /* thread_queue_fifo */ 1075 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 1076 char ul_error_detection; /* thread_error_detection */ 1077 char ul_async_safe; /* thread_async_safe */ 1078 char ul_rt; /* found on an RT queue */ 1079 char ul_rtqueued; /* was RT when queued */ 1080 char ul_misaligned; /* thread_locks_misaligned */ 1081 char ul_pad[3]; 1082 int ul_adaptive_spin; /* thread_adaptive_spin */ 1083 int ul_queue_spin; /* thread_queue_spin */ 1084 int ul_critical; /* non-zero == in a critical region */ 1085 int ul_sigdefer; /* non-zero == defer signals */ 1086 int ul_vfork; /* thread is the child of vfork() */ 1087 int ul_cancelable; /* _cancelon()/_canceloff() */ 1088 char ul_cancel_pending; /* pthread_cancel() was called */ 1089 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 1090 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 1091 char ul_save_async; /* saved copy of ul_cancel_async */ 1092 char ul_mutator; /* lwp is a mutator (java interface) */ 1093 char ul_created; /* created suspended */ 1094 char ul_replace; /* replacement; must be free()d */ 1095 uchar_t ul_nocancel; /* cancellation can't happen */ 1096 int ul_errno; /* per-thread errno */ 1097 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 1098 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 1099 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 1100 caddr32_t ul_schedctl; /* schedctl data */ 1101 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 1102 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 1103 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 1104 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 1105 td_evbuf32_t ul_td_evbuf; /* event buffer */ 1106 char ul_td_events_enable; /* event mechanism enabled */ 1107 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 1108 char ul_qtype; /* MX or CV */ 1109 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 1110 int ul_rtld; /* thread is running inside ld.so.1 */ 1111 int ul_usropts; /* flags given to thr_create() */ 1112 caddr32_t ul_startpc; /* start func (thr_create()) */ 1113 caddr32_t ul_startarg; /* argument for start function */ 1114 caddr32_t ul_wchan; /* synch object when sleeping */ 1115 caddr32_t ul_link; /* sleep queue link */ 1116 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 1117 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 1118 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 1119 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 1120 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 1121 /* 0 means there is but a single entry */ 1122 union { /* single entry or pointer to array */ 1123 readlock32_t single; 1124 caddr32_t array; 1125 } ul_readlock; 1126 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 1127 /* 0 means there is but a single entry */ 1128 union { /* single entry or pointer to array */ 1129 caddr32_t single; 1130 caddr32_t array; 1131 } ul_heldlocks; 1132 /* PROBE_SUPPORT begin */ 1133 caddr32_t ul_tpdp; 1134 /* PROBE_SUPPORT end */ 1135 caddr32_t ul_siglink; /* pointer to previous context */ 1136 uint_t ul_spin_lock_spin; /* spin lock statistics */ 1137 uint_t ul_spin_lock_spin2; 1138 uint_t ul_spin_lock_sleep; 1139 uint_t ul_spin_lock_wakeup; 1140 queue_root32_t ul_queue_root; /* root of a sleep queue */ 1141 id_t ul_rtclassid; /* real-time class id */ 1142 uint_t ul_pilocks; /* count of PI locks held */ 1143 /* the following members *must* be last in the structure */ 1144 /* they are discarded when ulwp is replaced on thr_exit() */ 1145 sigset_t ul_sigmask; /* thread's current signal mask */ 1146 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 1147 siginfo32_t ul_siginfo; /* deferred siginfo */ 1148 mutex_t ul_spinlock; /* used when suspending/continuing */ 1149 fpuenv32_t ul_fpuenv; /* floating point state */ 1150 caddr32_t ul_sp; /* stack pointer when blocked */ 1151 #if defined(sparc) 1152 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 1153 #endif 1154 tumem32_t ul_tmem; /* used only by umem */ 1155 uint_t ul_ptinherit; /* pthreads sched inherit value */ 1156 char ul_ntoabuf[18]; /* thread-specific inet_ntoa buffer */ 1157 } ulwp32_t; 1158 1159 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 1160 1161 typedef struct uberdata32 { 1162 pad_lock_t _link_lock; 1163 pad_lock_t _ld_lock; 1164 pad_lock_t _fork_lock; 1165 pad_lock_t _atfork_lock; 1166 pad32_lock_t _callout_lock; 1167 pad32_lock_t _tdb_hash_lock; 1168 tdb_sync_stats_t tdb_hash_lock_stats; 1169 siguaction32_t siguaction[NSIG]; 1170 bucket32_t bucket[NBUCKETS]; 1171 atexit_root32_t atexit_root; 1172 quickexit_root32_t quickexit_root; 1173 tsd_metadata32_t tsd_metadata; 1174 tls_metadata32_t tls_metadata; 1175 char primary_map; 1176 char bucket_init; 1177 char pad[2]; 1178 uberflags_t uberflags; 1179 caddr32_t queue_head; 1180 caddr32_t thr_hash_table; 1181 uint_t hash_size; 1182 uint_t hash_mask; 1183 caddr32_t ulwp_one; 1184 caddr32_t all_lwps; 1185 caddr32_t all_zombies; 1186 int nthreads; 1187 int nzombies; 1188 int ndaemons; 1189 int pid; 1190 caddr32_t sigacthandler; 1191 caddr32_t lwp_stacks; 1192 caddr32_t lwp_laststack; 1193 int nfreestack; 1194 int thread_stack_cache; 1195 caddr32_t ulwp_freelist; 1196 caddr32_t ulwp_lastfree; 1197 caddr32_t ulwp_replace_free; 1198 caddr32_t ulwp_replace_last; 1199 caddr32_t atforklist; 1200 caddr32_t robustlocks; 1201 caddr32_t robustlist; 1202 caddr32_t progname; 1203 caddr32_t ub_comm_page; 1204 caddr32_t tdb_bootstrap; 1205 tdb32_t tdb; 1206 } uberdata32_t; 1207 1208 #endif /* _SYSCALL32 */ 1209 1210 /* ul_stop values */ 1211 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1212 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1213 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1214 1215 /* 1216 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1217 */ 1218 1219 typedef struct _cvattr { 1220 int pshared; 1221 clockid_t clockid; 1222 } cvattr_t; 1223 1224 typedef struct _mattr { 1225 int pshared; 1226 int protocol; 1227 int prioceiling; 1228 int type; 1229 int robustness; 1230 } mattr_t; 1231 1232 typedef struct _thrattr { 1233 size_t stksize; 1234 void *stkaddr; 1235 int detachstate; 1236 int daemonstate; 1237 int scope; 1238 int prio; 1239 int policy; 1240 int inherit; 1241 size_t guardsize; 1242 char name[THREAD_NAME_MAX]; 1243 } thrattr_t; 1244 1245 typedef struct _rwlattr { 1246 int pshared; 1247 } rwlattr_t; 1248 1249 /* _curthread() is inline for speed */ 1250 extern ulwp_t *_curthread(void); 1251 #define curthread (_curthread()) 1252 1253 /* this version (also inline) can be tested for NULL */ 1254 extern ulwp_t *__curthread(void); 1255 1256 /* get the current stack pointer (also inline) */ 1257 extern greg_t stkptr(void); 1258 1259 /* 1260 * Suppress __attribute__((...)) if we are not compiling with gcc 1261 */ 1262 #if !defined(__GNUC__) 1263 #define __attribute__(string) 1264 #endif 1265 1266 /* Fetch the dispatch (kernel) priority of a thread */ 1267 #define real_priority(ulwp) \ 1268 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0) 1269 1270 /* 1271 * Implementation functions. Not visible outside of the library itself. 1272 */ 1273 extern int __nanosleep(const timespec_t *, timespec_t *); 1274 extern void getgregs(ulwp_t *, gregset_t); 1275 extern void setgregs(ulwp_t *, gregset_t); 1276 extern void thr_panic(const char *) __NORETURN; 1277 #pragma rarely_called(thr_panic) 1278 extern void mutex_panic(mutex_t *, const char *) __NORETURN; 1279 #pragma rarely_called(mutex_panic) 1280 extern ulwp_t *find_lwp(thread_t); 1281 extern void finish_init(void); 1282 extern void update_sched(ulwp_t *); 1283 extern void queue_alloc(void); 1284 extern void tmem_exit(void); 1285 extern void tsd_exit(void); 1286 extern void tsd_free(ulwp_t *); 1287 extern void tls_setup(void); 1288 extern void tls_exit(void); 1289 extern void tls_free(ulwp_t *); 1290 extern void rwl_free(ulwp_t *); 1291 extern void heldlock_exit(void); 1292 extern void heldlock_free(ulwp_t *); 1293 extern void sigacthandler(int, siginfo_t *, void *); 1294 extern void signal_init(void); 1295 extern int sigequalset(const sigset_t *, const sigset_t *); 1296 extern void mutex_setup(void); 1297 extern void take_deferred_signal(int); 1298 extern void *setup_top_frame(void *, size_t, ulwp_t *); 1299 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1300 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1301 extern volatile sc_shared_t *setup_schedctl(void); 1302 extern void *lmalloc(size_t); 1303 extern void lfree(void *, size_t); 1304 extern void *libc_malloc(size_t); 1305 extern void *libc_realloc(void *, size_t); 1306 extern void libc_free(void *); 1307 extern char *libc_strdup(const char *); 1308 extern void ultos(uint64_t, int, char *); 1309 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1310 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1311 extern void thread_error(const char *); 1312 extern void grab_assert_lock(void); 1313 extern void dump_queue_statistics(void); 1314 extern void collect_queue_statistics(void); 1315 extern void record_spin_locks(ulwp_t *); 1316 extern void remember_lock(mutex_t *); 1317 extern void forget_lock(mutex_t *); 1318 extern void register_lock(mutex_t *); 1319 extern void unregister_locks(void); 1320 #if defined(__sparc) 1321 extern void _flush_windows(void); 1322 #else 1323 #define _flush_windows() 1324 #endif 1325 extern void set_curthread(void *); 1326 extern void ssp_init(void); 1327 1328 extern int sema_relclockwait(sema_t *, clockid_t, const timespec_t *); 1329 extern int sema_clockwait(sema_t *, clockid_t, const timespec_t *); 1330 1331 1332 /* 1333 * Utility function used when waking up many threads (more than MAXLWPS) 1334 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1335 */ 1336 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1337 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1338 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1339 1340 /* enter a critical section */ 1341 #define enter_critical(self) (self->ul_critical++) 1342 1343 /* exit a critical section, take deferred actions if necessary */ 1344 extern void do_exit_critical(void); 1345 #define exit_critical(self) \ 1346 (void) (self->ul_critical--, \ 1347 ((self->ul_curplease && self->ul_critical == 0)? \ 1348 (do_exit_critical(), 0) : 0)) 1349 1350 /* 1351 * Like enter_critical()/exit_critical() but just for deferring signals. 1352 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1353 * calling application functions like constructors and destructors. 1354 * Care must be taken if the application function attempts to set 1355 * the signal mask while a deferred signal is present; the setting 1356 * of the signal mask must also be deferred. 1357 */ 1358 #define sigoff(self) (self->ul_sigdefer++) 1359 #define sigon(self) \ 1360 (void) ((--self->ul_sigdefer == 0 && \ 1361 self->ul_curplease && self->ul_critical == 0)? \ 1362 (do_exit_critical(), 0) : 0) 1363 1364 /* these are exported functions */ 1365 extern void _sigoff(void); 1366 extern void _sigon(void); 1367 1368 #define sigorset(s1, s2) \ 1369 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1370 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1371 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1372 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1373 1374 #define sigandset(s1, s2) \ 1375 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1376 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1377 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1378 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1379 1380 #define sigdiffset(s1, s2) \ 1381 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1382 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1383 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1384 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1385 1386 #define delete_reserved_signals(s) \ 1387 (((s)->__sigbits[0] &= MASKSET0), \ 1388 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1389 ((s)->__sigbits[2] &= MASKSET2), \ 1390 ((s)->__sigbits[3] &= MASKSET3)) 1391 1392 extern void block_all_signals(ulwp_t *self); 1393 1394 /* 1395 * When restoring the signal mask after having previously called 1396 * block_all_signals(), if we have a deferred signal present then 1397 * do nothing other than ASSERT() that we are in a critical region. 1398 * The signal mask will be set when we emerge from the critical region 1399 * and call take_deferred_signal(). There is no race condition here 1400 * because the kernel currently has all signals blocked for this thread. 1401 */ 1402 #define restore_signals(self) \ 1403 ((void) ((self)->ul_cursig? \ 1404 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1405 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask))) 1406 1407 extern void set_cancel_pending_flag(ulwp_t *, int); 1408 extern void set_cancel_eintr_flag(ulwp_t *); 1409 extern void set_parking_flag(ulwp_t *, int); 1410 extern int cancel_active(void); 1411 1412 extern void *_thrp_setup(ulwp_t *); 1413 extern void _fpinherit(ulwp_t *); 1414 extern void _lwp_start(void); 1415 extern void _lwp_terminate(void); 1416 extern void lmutex_lock(mutex_t *); 1417 extern void lmutex_unlock(mutex_t *); 1418 extern void lrw_rdlock(rwlock_t *); 1419 extern void lrw_wrlock(rwlock_t *); 1420 extern void lrw_unlock(rwlock_t *); 1421 extern void sig_mutex_lock(mutex_t *); 1422 extern void sig_mutex_unlock(mutex_t *); 1423 extern int sig_mutex_trylock(mutex_t *); 1424 extern int sig_cond_wait(cond_t *, mutex_t *); 1425 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1426 extern void cancel_safe_mutex_lock(mutex_t *); 1427 extern void cancel_safe_mutex_unlock(mutex_t *); 1428 extern int cancel_safe_mutex_trylock(mutex_t *); 1429 extern void _prefork_handler(void); 1430 extern void _postfork_parent_handler(void); 1431 extern void _postfork_child_handler(void); 1432 extern void postfork1_child(void); 1433 extern void postfork1_child_aio(void); 1434 extern void postfork1_child_sigev_aio(void); 1435 extern void postfork1_child_sigev_mq(void); 1436 extern void postfork1_child_sigev_timer(void); 1437 extern void postfork1_child_tpool(void); 1438 extern void fork_lock_enter(void); 1439 extern void fork_lock_exit(void); 1440 extern void suspend_fork(void); 1441 extern void continue_fork(int); 1442 extern void do_sigcancel(void); 1443 extern void setup_cancelsig(int); 1444 extern void init_sigev_thread(void); 1445 extern void init_aio(void); 1446 extern void init_progname(void); 1447 extern void _cancelon(void); 1448 extern void _canceloff(void); 1449 extern void _canceloff_nocancel(void); 1450 extern void _cancel_prologue(void); 1451 extern void _cancel_epilogue(void); 1452 extern void no_preempt(ulwp_t *); 1453 extern void preempt(ulwp_t *); 1454 extern void _thrp_unwind(void *); 1455 1456 extern pid_t __forkx(int); 1457 extern pid_t __forkallx(int); 1458 extern int __open(const char *, int, mode_t); 1459 extern int __open64(const char *, int, mode_t); 1460 extern int __openat(int, const char *, int, mode_t); 1461 extern int __openat64(int, const char *, int, mode_t); 1462 extern int __close(int); 1463 extern ssize_t __read(int, void *, size_t); 1464 extern ssize_t __write(int, const void *, size_t); 1465 extern int __fcntl(int, int, ...); 1466 extern int __lwp_continue(lwpid_t); 1467 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1468 extern int ___lwp_suspend(lwpid_t); 1469 extern int lwp_wait(lwpid_t, lwpid_t *); 1470 extern int __lwp_wait(lwpid_t, lwpid_t *); 1471 extern int __lwp_detach(lwpid_t); 1472 extern sc_shared_t *__schedctl(void); 1473 1474 /* actual system call traps */ 1475 extern int __setcontext(const ucontext_t *); 1476 extern int __getcontext(ucontext_t *); 1477 extern int __clock_gettime(clockid_t, timespec_t *); 1478 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1479 extern void hrt2ts(hrtime_t, timespec_t *); 1480 1481 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1482 extern int __sigprocmask(int, const sigset_t *, sigset_t *); 1483 extern int __lwp_sigmask(int, const sigset_t *); 1484 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1485 extern caddr_t __sighndlrend; 1486 #pragma unknown_control_flow(__sighndlr) 1487 1488 /* belongs in <pthread.h> */ 1489 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1490 #define PTHREAD_CREATE_NONDAEMON_NP 0 1491 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1492 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1493 1494 extern int mutex_held(mutex_t *); 1495 extern int mutex_lock_internal(mutex_t *, timespec_t *, int); 1496 extern int mutex_unlock_internal(mutex_t *, int); 1497 1498 /* not cancellation points: */ 1499 extern int __cond_wait(cond_t *, mutex_t *); 1500 extern int __cond_timedwait(cond_t *, mutex_t *, clockid_t, 1501 const timespec_t *); 1502 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1503 1504 extern int rw_read_held(rwlock_t *); 1505 extern int rw_write_held(rwlock_t *); 1506 1507 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1508 thread_t *, size_t, const char *); 1509 extern int _thrp_suspend(thread_t, uchar_t); 1510 extern int _thrp_continue(thread_t, uchar_t); 1511 1512 extern void _thrp_terminate(void *); 1513 extern void _thrp_exit(void); 1514 1515 extern const pcclass_t *get_info_by_class(id_t); 1516 extern const pcclass_t *get_info_by_policy(int); 1517 extern const thrattr_t *def_thrattr(void); 1518 extern id_t setparam(idtype_t, id_t, int, int); 1519 extern id_t setprio(idtype_t, id_t, int, int *); 1520 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *); 1521 1522 /* 1523 * System call wrappers (direct interfaces to the kernel) 1524 */ 1525 extern int ___lwp_mutex_register(mutex_t *, mutex_t **); 1526 extern int ___lwp_mutex_trylock(mutex_t *, ulwp_t *); 1527 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *, ulwp_t *); 1528 extern int ___lwp_mutex_unlock(mutex_t *); 1529 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1530 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1531 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1532 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1533 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1534 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1535 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1536 extern int __lwp_rwlock_unlock(rwlock_t *); 1537 extern int __lwp_park(timespec_t *, lwpid_t); 1538 extern int __lwp_unpark(lwpid_t); 1539 extern int __lwp_unpark_all(lwpid_t *, int); 1540 #if defined(__x86) 1541 extern int ___lwp_private(int, int, void *); 1542 #endif /* __x86 */ 1543 1544 /* 1545 * inlines 1546 */ 1547 extern int set_lock_byte(volatile uint8_t *); 1548 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1549 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1550 extern void atomic_inc_32(volatile uint32_t *); 1551 extern void atomic_dec_32(volatile uint32_t *); 1552 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1553 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1554 #if defined(__sparc) 1555 extern ulong_t caller(void); 1556 extern ulong_t getfp(void); 1557 #endif /* __sparc */ 1558 1559 #include "thr_inlines.h" 1560 1561 #endif /* _THR_UBERDATA_H */ 1562