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