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 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _THR_UBERDATA_H 28 #define _THR_UBERDATA_H 29 30 #include <stdlib.h> 31 #include <unistd.h> 32 #include <sys/types.h> 33 #include <fcntl.h> 34 #include <string.h> 35 #include <signal.h> 36 #include <ucontext.h> 37 #include <thread.h> 38 #include <pthread.h> 39 #include <atomic.h> 40 #include <link.h> 41 #include <sys/resource.h> 42 #include <sys/lwp.h> 43 #include <errno.h> 44 #include <sys/asm_linkage.h> 45 #include <sys/regset.h> 46 #include <sys/fcntl.h> 47 #include <sys/mman.h> 48 #include <synch.h> 49 #include <door.h> 50 #include <limits.h> 51 #include <sys/synch32.h> 52 #include <schedctl.h> 53 #include <sys/priocntl.h> 54 #include <thread_db.h> 55 #include <setjmp.h> 56 #include "libc_int.h" 57 #include "tdb_agent.h" 58 #include "thr_debug.h" 59 60 /* 61 * This is an implementation-specific include file for threading support. 62 * It is not to be seen by the clients of the library. 63 * 64 * This file also describes uberdata in libc. 65 * 66 * The term "uberdata" refers to data that is unique and visible across 67 * all link maps. The name is meant to imply that such data is truly 68 * global, not just locally global to a particular link map. 69 * 70 * See the Linker and Libraries Guide for a full description of alternate 71 * link maps and how they are set up and used. 72 * 73 * Alternate link maps implement multiple global namespaces within a single 74 * process. There may be multiple instances of identical dynamic libraries 75 * loaded in a process's address space at the same time, each on a different 76 * link map (as determined by the dynamic linker), each with its own set of 77 * global variables. Which particular instance of a global variable is seen 78 * by a thread running in the process is determined by the link map on which 79 * the thread happens to be executing at the time. 80 * 81 * However, there are aspects of a process that are unique across all 82 * link maps, in particular the structures used to implement threads 83 * of control (in Sparc terminology, there is only one %g7 regardless 84 * of the link map on which the thread is executing). 85 * 86 * All uberdata is referenced from a base pointer in the thread's ulwp_t 87 * structure (which is also uberdata). All allocations and deallocations 88 * of uberdata are made via the uberdata-aware lmalloc() and lfree() 89 * interfaces (malloc() and free() are simply locally-global). 90 */ 91 92 /* 93 * Special libc-private access to errno. 94 * We do this so that references to errno do not invoke the dynamic linker. 95 */ 96 #undef errno 97 #define errno (*curthread->ul_errnop) 98 99 /* 100 * See <sys/synch32.h> for the reasons for these values 101 * and why they are different for sparc and intel. 102 */ 103 #if defined(__sparc) 104 105 /* lock.lock64.pad[x] 4 5 6 7 */ 106 #define LOCKMASK 0xff000000 107 #define WAITERMASK 0x000000ff 108 #define SPINNERMASK 0x00ff0000 109 #define SPINNERSHIFT 16 110 #define WAITER 0x00000001 111 #define LOCKSET 0xff 112 #define LOCKCLEAR 0 113 114 #define PIDSHIFT 32 115 #define LOCKMASK64 0xffffffffff000000ULL 116 #define LOCKBYTE64 0x00000000ff000000ULL 117 #define WAITERMASK64 0x00000000000000ffULL 118 #define SPINNERMASK64 0x0000000000ff0000ULL 119 120 #elif defined(__x86) 121 122 /* lock.lock64.pad[x] 7 6 5 4 */ 123 #define LOCKMASK 0xff000000 124 #define WAITERMASK 0x00ff0000 125 #define SPINNERMASK 0x0000ff00 126 #define SPINNERSHIFT 8 127 #define WAITER 0x00010000 128 #define LOCKSET 0x01 129 #define LOCKCLEAR 0 130 131 #define PIDSHIFT 0 132 #define LOCKMASK64 0xff000000ffffffffULL 133 #define LOCKBYTE64 0x0100000000000000ULL 134 #define WAITERMASK64 0x00ff000000000000ULL 135 #define SPINNERMASK64 0x0000ff0000000000ULL 136 137 #else 138 #error "neither __sparc nor __x86 is defined" 139 #endif 140 141 /* 142 * Fetch the owner of a USYNC_THREAD mutex. 143 * Don't use this with process-shared mutexes; 144 * the owing thread may be in a different process. 145 */ 146 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 147 148 /* 149 * Test if a thread owns a process-private (USYNC_THREAD) mutex. 150 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex. 151 * The 'mp' argument must not have side-effects since it is evaluated twice. 152 */ 153 #define MUTEX_OWNED(mp, thrp) \ 154 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 155 156 157 /* 158 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 159 * collection of lock statistics by a debugger or other collecting tool. 160 * 161 * uberflags.uf_thread_error_detection is set by an environment variable: 162 * _THREAD_ERROR_DETECTION 163 * 0 == no detection of locking primitive errors. 164 * 1 == detect errors and issue a warning message. 165 * 2 == detect errors, issue a warning message, and dump core. 166 * 167 * We bundle these together in uberflags.uf_trs_ted to make a test of either 168 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 169 * 170 * uberflags.uf_mt is set non-zero when the first thread (in addition 171 * to the main thread) is created. 172 * 173 * We bundle all these flags together in uberflags.uf_all to make a test 174 * of any being non-zero a single memory reference (again, for speed). 175 */ 176 typedef union { 177 int uf_all; /* combined all flags */ 178 struct { 179 short h_pad; 180 short h_trs_ted; /* combined reg sync & error detect */ 181 } uf_h; 182 struct { 183 char x_mt; 184 char x_pad; 185 char x_tdb_register_sync; 186 char x_thread_error_detection; 187 } uf_x; 188 } uberflags_t; 189 190 #define uf_mt uf_x.x_mt 191 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 192 #define uf_thread_error_detection uf_x.x_thread_error_detection 193 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 194 195 /* 196 * NOTE WELL: 197 * To enable further optimization, the "ul_schedctl_called" member 198 * of the ulwp_t structure (below) serves double-duty: 199 * 1. If NULL, it means that the thread must call __schedctl() 200 * to set up its schedctl mappings before acquiring a mutex. 201 * This is required by the implementation of adaptive mutex locking. 202 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 203 * uberflags can be made without additional memory references. 204 * This allows the common case of _mutex_lock() and _mutex_unlock() for 205 * USYNC_THREAD mutexes with no error detection and no lock statistics 206 * to be optimized for speed. 207 */ 208 209 /* double the default stack size for 64-bit processes */ 210 #ifdef _LP64 211 #define MINSTACK (8 * 1024) 212 #define DEFAULTSTACK (2 * 1024 * 1024) 213 #else 214 #define MINSTACK (4 * 1024) 215 #define DEFAULTSTACK (1024 * 1024) 216 #endif 217 218 #define MUTEX_TRY 0 219 #define MUTEX_LOCK 1 220 #define MUTEX_NOCEIL 0x40 221 222 #if defined(__x86) 223 224 typedef struct { /* structure returned by fnstenv */ 225 int fctrl; /* control word */ 226 int fstat; /* status word (flags, etc) */ 227 int ftag; /* tag of which regs busy */ 228 int misc[4]; /* other stuff, 28 bytes total */ 229 } fpuenv_t; 230 231 #ifdef _SYSCALL32 232 typedef fpuenv_t fpuenv32_t; 233 #endif /* _SYSCALL32 */ 234 235 #elif defined(__sparc) 236 237 typedef struct { /* fp state structure */ 238 greg_t fsr; 239 greg_t fpu_en; 240 } fpuenv_t; 241 242 #ifdef _SYSCALL32 243 typedef struct { 244 greg32_t fsr; 245 greg32_t fpu_en; 246 } fpuenv32_t; 247 #endif /* _SYSCALL32 */ 248 249 #endif /* __x86 */ 250 251 #if defined(__x86) 252 extern void ht_pause(void); /* "pause" instruction */ 253 #define SMT_PAUSE() ht_pause() 254 #elif defined(SMT_PAUSE_FUNCTION) 255 extern void SMT_PAUSE_FUNCTION(void); 256 #define SMT_PAUSE() SMT_PAUSE_FUNCTION() 257 #else 258 #define SMT_PAUSE() 259 #endif /* __x86 */ 260 261 /* 262 * Cleanup handler related data. 263 * This structure is exported as _cleanup_t in pthread.h. 264 * pthread.h exports only the size of this structure, so check 265 * _cleanup_t in pthread.h before making any change here. 266 */ 267 typedef struct __cleanup { 268 struct __cleanup *next; /* pointer to next handler */ 269 caddr_t fp; /* current frame pointer */ 270 void (*func)(void *); /* cleanup handler address */ 271 void *arg; /* handler's argument */ 272 } __cleanup_t; 273 274 /* 275 * Thread-Specific Data (TSD) 276 * TSD_NFAST includes the invalid key zero, so there 277 * are really only (TSD_NFAST - 1) fast key slots. 278 */ 279 typedef void (*PFrV)(void *); 280 #define TSD_UNALLOCATED ((PFrV)1) 281 #define TSD_NFAST 9 282 283 /* 284 * The tsd union is designed to burn a little memory (9 words) to make 285 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 286 * end of the pad region to increase the likelihood that it falls on the 287 * same cache line as the data. 288 */ 289 typedef union tsd { 290 uint_t tsd_nalloc; /* Amount of allocated storage */ 291 void *tsd_pad[TSD_NFAST]; 292 void *tsd_data[1]; 293 } tsd_t; 294 295 typedef struct { 296 mutex_t tsdm_lock; /* Lock protecting the data */ 297 uint_t tsdm_nkeys; /* Number of allocated keys */ 298 uint_t tsdm_nused; /* Number of used keys */ 299 PFrV *tsdm_destro; /* Per-key destructors */ 300 char tsdm_pad[64 - /* pad to 64 bytes */ 301 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 302 } tsd_metadata_t; 303 304 #ifdef _SYSCALL32 305 typedef union tsd32 { 306 uint_t tsd_nalloc; /* Amount of allocated storage */ 307 caddr32_t tsd_pad[TSD_NFAST]; 308 caddr32_t tsd_data[1]; 309 } tsd32_t; 310 311 typedef struct { 312 mutex_t tsdm_lock; /* Lock protecting the data */ 313 uint_t tsdm_nkeys; /* Number of allocated keys */ 314 uint_t tsdm_nused; /* Number of used keys */ 315 caddr32_t tsdm_destro; /* Per-key destructors */ 316 char tsdm_pad[64 - /* pad to 64 bytes */ 317 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 318 } tsd_metadata32_t; 319 #endif /* _SYSCALL32 */ 320 321 322 /* 323 * Thread-Local Storage (TLS) 324 */ 325 typedef struct { 326 void *tls_data; 327 size_t tls_size; 328 } tls_t; 329 330 typedef struct { 331 mutex_t tls_lock; /* Lock protecting the data */ 332 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 333 tls_t static_tls; /* Template for static TLS */ 334 char tls_pad[64 - /* pad to 64 bytes */ 335 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 336 } tls_metadata_t; 337 338 #ifdef _SYSCALL32 339 typedef struct { 340 caddr32_t tls_data; 341 size32_t tls_size; 342 } tls32_t; 343 344 typedef struct { 345 mutex_t tls_lock; /* Lock protecting the data */ 346 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 347 tls32_t static_tls; /* Template for static TLS */ 348 char tls_pad[64 - /* pad to 64 bytes */ 349 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 350 } tls_metadata32_t; 351 #endif /* _SYSCALL32 */ 352 353 354 /* 355 * Sleep queue root for USYNC_THREAD condvars and mutexes. 356 * There is a default queue root for each queue head (see below). 357 * Also, each ulwp_t contains a queue root that can be used 358 * when the thread is enqueued on the queue, if necessary 359 * (when more than one wchan hashes to the same queue head). 360 */ 361 typedef struct queue_root { 362 struct queue_root *qr_next; 363 struct queue_root *qr_prev; 364 struct ulwp *qr_head; 365 struct ulwp *qr_tail; 366 void *qr_wchan; 367 uint32_t qr_rtcount; 368 uint32_t qr_qlen; 369 uint32_t qr_qmax; 370 } queue_root_t; 371 372 #ifdef _SYSCALL32 373 typedef struct queue_root32 { 374 caddr32_t qr_next; 375 caddr32_t qr_prev; 376 caddr32_t qr_head; 377 caddr32_t qr_tail; 378 caddr32_t qr_wchan; 379 uint32_t qr_rtcount; 380 uint32_t qr_qlen; 381 uint32_t qr_qmax; 382 } queue_root32_t; 383 #endif 384 385 /* 386 * Sleep queue heads for USYNC_THREAD condvars and mutexes. 387 * The size and alignment is 128 bytes to reduce cache conflicts. 388 * Each queue head points to a list of queue roots, defined above. 389 * Each queue head contains a default queue root for use when only one 390 * is needed. It is always at the tail of the queue root hash chain. 391 */ 392 typedef union { 393 uint64_t qh_64[16]; 394 struct { 395 mutex_t q_lock; 396 uint8_t q_qcnt; 397 uint8_t q_type; /* MX or CV */ 398 uint8_t q_pad1[2]; 399 uint32_t q_lockcount; 400 uint32_t q_qlen; 401 uint32_t q_qmax; 402 void *q_wchan; /* valid only while locked */ 403 struct queue_root *q_root; /* valid only while locked */ 404 struct queue_root *q_hlist; 405 #if !defined(_LP64) 406 caddr_t q_pad2[3]; 407 #endif 408 queue_root_t q_def_root; 409 uint32_t q_hlen; 410 uint32_t q_hmax; 411 } qh_qh; 412 } queue_head_t; 413 414 #define qh_lock qh_qh.q_lock 415 #define qh_qcnt qh_qh.q_qcnt 416 #define qh_type qh_qh.q_type 417 #if defined(THREAD_DEBUG) 418 #define qh_lockcount qh_qh.q_lockcount 419 #define qh_qlen qh_qh.q_qlen 420 #define qh_qmax qh_qh.q_qmax 421 #endif 422 #define qh_wchan qh_qh.q_wchan 423 #define qh_root qh_qh.q_root 424 #define qh_hlist qh_qh.q_hlist 425 #define qh_def_root qh_qh.q_def_root 426 #define qh_hlen qh_qh.q_hlen 427 #define qh_hmax qh_qh.q_hmax 428 429 /* queue types passed to queue_lock() */ 430 #define MX 0 431 #define CV 1 432 #define QHASHSHIFT 9 /* number of hashing bits */ 433 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */ 434 #define QUEUE_HASH(wchan, type) ((uint_t) \ 435 ((((uintptr_t)(wchan) >> 3) \ 436 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \ 437 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 438 439 extern queue_head_t *queue_lock(void *, int); 440 extern void queue_unlock(queue_head_t *); 441 extern void enqueue(queue_head_t *, struct ulwp *, int); 442 extern struct ulwp *dequeue(queue_head_t *, int *); 443 extern struct ulwp **queue_slot(queue_head_t *, struct ulwp **, int *); 444 extern struct ulwp *queue_waiter(queue_head_t *); 445 extern int dequeue_self(queue_head_t *); 446 extern void queue_unlink(queue_head_t *, 447 struct ulwp **, struct ulwp *); 448 extern void unsleep_self(void); 449 extern void spin_lock_set(mutex_t *); 450 extern void spin_lock_clear(mutex_t *); 451 452 /* 453 * Scheduling class information structure. 454 */ 455 typedef struct { 456 short pcc_state; 457 short pcc_policy; 458 pri_t pcc_primin; 459 pri_t pcc_primax; 460 pcinfo_t pcc_info; 461 } pcclass_t; 462 463 /* 464 * Memory block for chain of owned ceiling mutexes. 465 */ 466 typedef struct mxchain { 467 struct mxchain *mxchain_next; 468 mutex_t *mxchain_mx; 469 } mxchain_t; 470 471 /* 472 * Pointer to an rwlock that is held for reading. 473 * Used in rw_rdlock() to allow a thread that already holds a read 474 * lock to acquire another read lock on the same rwlock even if 475 * there are writers waiting. This to avoid deadlock when acquiring 476 * a read lock more than once in the presence of pending writers. 477 * POSIX mandates this behavior. 478 */ 479 typedef struct { 480 void *rd_rwlock; /* the rwlock held for reading */ 481 size_t rd_count; /* count of read locks applied */ 482 } readlock_t; 483 484 #ifdef _SYSCALL32 485 typedef struct { 486 caddr32_t rd_rwlock; 487 size32_t rd_count; 488 } readlock32_t; 489 #endif /* _SYSCALL32 */ 490 491 /* 492 * Maximum number of read locks allowed for one thread on one rwlock. 493 * This could be as large as INT_MAX, but the SUSV3 test suite would 494 * take an inordinately long time to complete. This is big enough. 495 */ 496 #define READ_LOCK_MAX 100000 497 498 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 499 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 500 501 /* 502 * Round up an integral value to a multiple of 64 503 */ 504 #define roundup64(x) (-(-(x) & -64)) 505 506 /* 507 * NOTE: Whatever changes are made to ulwp_t must be 508 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 509 * 510 * NOTE: ul_self *must* be the first member of ulwp_t on x86 511 * Low-level x86 code relies on this. 512 */ 513 typedef struct ulwp { 514 /* 515 * These members always need to come first on sparc. 516 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 517 */ 518 #if defined(__sparc) 519 uint32_t ul_dinstr; /* scratch space for dtrace */ 520 uint32_t ul_padsparc0[15]; 521 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 522 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 523 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 524 uint32_t ul_dreturn; /* dtrace: return %o0 */ 525 #endif 526 struct ulwp *ul_self; /* pointer to self */ 527 #if defined(__i386) 528 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 529 #elif defined(__amd64) 530 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 531 #endif 532 struct uberdata *ul_uberdata; /* uber (super-global) data */ 533 tls_t ul_tls; /* dynamic thread-local storage base */ 534 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 535 struct ulwp *ul_back; /* protected by link_lock */ 536 struct ulwp *ul_next; /* list to keep track of stacks */ 537 struct ulwp *ul_hash; /* hash chain linked list */ 538 void *ul_rval; /* return value from thr_exit() */ 539 caddr_t ul_stk; /* mapping base of the stack */ 540 size_t ul_mapsiz; /* mapping size of the stack */ 541 size_t ul_guardsize; /* normally _lpagesize */ 542 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 543 size_t ul_stksiz; /* broken thr_stksegment() interface */ 544 stack_t ul_ustack; /* current stack boundaries */ 545 int ul_ix; /* hash index */ 546 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 547 pri_t ul_pri; /* scheduling priority */ 548 pri_t ul_epri; /* real-time ceiling priority */ 549 char ul_policy; /* scheduling policy */ 550 char ul_cid; /* scheduling class id */ 551 union { 552 struct { 553 char cursig; /* deferred signal number */ 554 char pleasestop; /* lwp requested to stop itself */ 555 } s; 556 short curplease; /* for testing both at once */ 557 } ul_cp; 558 char ul_stop; /* reason for stopping */ 559 char ul_signalled; /* this lwp was cond_signal()d */ 560 char ul_dead; /* this lwp has called thr_exit */ 561 char ul_unwind; /* posix: unwind C++ stack */ 562 char ul_detached; /* THR_DETACHED at thread_create() */ 563 /* or pthread_detach() was called */ 564 char ul_writer; /* sleeping in rw_wrlock() */ 565 char ul_stopping; /* set by curthread: stopping self */ 566 char ul_cancel_prologue; /* for _cancel_prologue() */ 567 short ul_preempt; /* no_preempt()/preempt() */ 568 short ul_savpreempt; /* pre-existing preempt value */ 569 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 570 char ul_main; /* thread is the main thread */ 571 char ul_fork; /* thread is performing a fork */ 572 char ul_primarymap; /* primary link-map is initialized */ 573 /* per-thread copies of the corresponding global variables */ 574 uint8_t ul_max_spinners; /* thread_max_spinners */ 575 char ul_door_noreserve; /* thread_door_noreserve */ 576 char ul_queue_fifo; /* thread_queue_fifo */ 577 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 578 char ul_error_detection; /* thread_error_detection */ 579 char ul_async_safe; /* thread_async_safe */ 580 char ul_rt; /* found on an RT queue */ 581 char ul_rtqueued; /* was RT when queued */ 582 char ul_misaligned; /* thread_locks_misaligned */ 583 char ul_pad[3]; 584 int ul_adaptive_spin; /* thread_adaptive_spin */ 585 int ul_queue_spin; /* thread_queue_spin */ 586 volatile int ul_critical; /* non-zero == in a critical region */ 587 int ul_sigdefer; /* non-zero == defer signals */ 588 int ul_vfork; /* thread is the child of vfork() */ 589 int ul_cancelable; /* _cancelon()/_canceloff() */ 590 char ul_cancel_pending; /* pthread_cancel() was called */ 591 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 592 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 593 char ul_save_async; /* saved copy of ul_cancel_async */ 594 char ul_mutator; /* lwp is a mutator (java interface) */ 595 char ul_created; /* created suspended */ 596 char ul_replace; /* replacement; must be free()d */ 597 uchar_t ul_nocancel; /* cancellation can't happen */ 598 int ul_errno; /* per-thread errno */ 599 int *ul_errnop; /* pointer to errno or self->ul_errno */ 600 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 601 uberflags_t *ul_schedctl_called; /* ul_schedctl is set up */ 602 volatile sc_shared_t *ul_schedctl; /* schedctl data */ 603 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 604 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 605 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 606 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 607 td_evbuf_t ul_td_evbuf; /* event buffer */ 608 char ul_td_events_enable; /* event mechanism enabled */ 609 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 610 char ul_qtype; /* MX or CV */ 611 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 612 int ul_usropts; /* flags given to thr_create() */ 613 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 614 void *ul_startarg; /* argument for start function */ 615 void *ul_wchan; /* synch object when sleeping */ 616 struct ulwp *ul_link; /* sleep queue link */ 617 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 618 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 619 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 620 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 621 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 622 /* 0 means there is but a single entry */ 623 union { /* single entry or pointer to array */ 624 readlock_t single; 625 readlock_t *array; 626 } ul_readlock; 627 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 628 /* 0 means there is but a single entry */ 629 union { /* single entry or pointer to array */ 630 mutex_t *single; 631 mutex_t **array; 632 } ul_heldlocks; 633 /* PROBE_SUPPORT begin */ 634 void *ul_tpdp; 635 /* PROBE_SUPPORT end */ 636 ucontext_t *ul_siglink; /* pointer to previous context */ 637 uint_t ul_spin_lock_spin; /* spin lock statistics */ 638 uint_t ul_spin_lock_spin2; 639 uint_t ul_spin_lock_sleep; 640 uint_t ul_spin_lock_wakeup; 641 queue_root_t ul_queue_root; /* root of a sleep queue */ 642 id_t ul_rtclassid; /* real-time class id */ 643 uint_t ul_pilocks; /* count of PI locks held */ 644 /* the following members *must* be last in the structure */ 645 /* they are discarded when ulwp is replaced on thr_exit() */ 646 sigset_t ul_sigmask; /* thread's current signal mask */ 647 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 648 siginfo_t ul_siginfo; /* deferred siginfo */ 649 mutex_t ul_spinlock; /* used when suspending/continuing */ 650 fpuenv_t ul_fpuenv; /* floating point state */ 651 uintptr_t ul_sp; /* stack pointer when blocked */ 652 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 653 #if defined(sparc) 654 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 655 #endif 656 } ulwp_t; 657 658 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 659 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 660 #define ul_curplease ul_cp.curplease /* for testing both at once */ 661 662 /* 663 * This is the size of a replacement ulwp, retained only for the benefit 664 * of thr_join(). The trailing members are unneeded for this purpose. 665 */ 666 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 667 668 /* 669 * Definitions for static initialization of signal sets, 670 * plus some sneaky optimizations in various places. 671 */ 672 673 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 674 675 #if (MAXSIG > 32 && MAXSIG <= 64) 676 #define FILLSET0 0xffffffffu 677 #define FILLSET1 ((1u << (MAXSIG - 32)) - 1) 678 #else 679 #error "fix me: MAXSIG out of bounds" 680 #endif 681 682 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 683 #define CANTMASK1 0 684 685 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 686 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 687 688 extern const sigset_t maskset; /* set of all maskable signals */ 689 690 extern int thread_adaptive_spin; 691 extern uint_t thread_max_spinners; 692 extern int thread_queue_spin; 693 extern int thread_queue_fifo; 694 extern int thread_queue_dump; 695 extern int thread_cond_wait_defer; 696 extern int thread_async_safe; 697 extern int thread_queue_verify; 698 699 /* 700 * pthread_atfork() related data, used to store atfork handlers. 701 */ 702 typedef struct atfork { 703 struct atfork *forw; /* forward pointer */ 704 struct atfork *back; /* backward pointer */ 705 void (*prepare)(void); /* pre-fork handler */ 706 void (*parent)(void); /* post-fork parent handler */ 707 void (*child)(void); /* post-fork child handler */ 708 } atfork_t; 709 710 /* 711 * Element in the table and in the list of registered process 712 * robust locks. We keep track of these to make sure that we 713 * only call ___lwp_mutex_register() once for each such lock 714 * after it is first mapped in (or newly mapped in). 715 */ 716 typedef struct robust { 717 struct robust *robust_next; /* hash table list */ 718 struct robust *robust_list; /* global list */ 719 mutex_t *robust_lock; 720 } robust_t; 721 722 /* 723 * Invalid address, used to mark an unused element in the hash table. 724 */ 725 #define INVALID_ADDR ((void *)(uintptr_t)(-1L)) 726 727 /* 728 * Parameters of the lock registration hash table. 729 */ 730 #define LOCKSHIFT 15 /* number of hashing bits */ 731 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<15 == 32K) */ 732 #define LOCK_HASH(addr) (uint_t) \ 733 ((((uintptr_t)(addr) >> 3) \ 734 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 735 & (LOCKHASHSZ - 1)) 736 737 /* 738 * Make our hot locks reside on private cache lines (64 bytes). 739 */ 740 typedef struct { 741 mutex_t pad_lock; 742 char pad_pad[64 - sizeof (mutex_t)]; 743 } pad_lock_t; 744 745 /* 746 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 747 */ 748 typedef struct { 749 mutex_t pad_lock; 750 char pad_pad[32 - sizeof (mutex_t)]; 751 } pad32_lock_t; 752 753 /* 754 * The threads hash table is used for fast lookup and locking of an active 755 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 756 * thr_hash_table_t structures, where N == 1 before the main thread creates 757 * the first additional thread and N == 1024 afterwards. Each element of the 758 * table is 64 bytes in size and alignment to reduce cache conflicts. 759 */ 760 typedef struct { 761 mutex_t hash_lock; /* lock per bucket */ 762 cond_t hash_cond; /* convar per bucket */ 763 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 764 char hash_pad[64 - /* pad out to 64 bytes */ 765 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 766 } thr_hash_table_t; 767 768 #ifdef _SYSCALL32 769 typedef struct { 770 mutex_t hash_lock; 771 cond_t hash_cond; 772 caddr32_t hash_bucket; 773 char hash_pad[64 - 774 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 775 } thr_hash_table32_t; 776 #endif /* _SYSCALL32 */ 777 778 779 /* 780 * siguaction members have 128-byte size and 64-byte alignment. 781 * We know that sizeof (struct sigaction) is 32 bytes for both 782 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 783 */ 784 typedef struct { 785 rwlock_t sig_lock; 786 struct sigaction sig_uaction; 787 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 788 } siguaction_t; 789 790 #ifdef _SYSCALL32 791 typedef struct { 792 rwlock_t sig_lock; 793 struct sigaction32 sig_uaction; 794 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 795 } siguaction32_t; 796 #endif /* _SYSCALL32 */ 797 798 799 /* 800 * Bucket structures, used by lmalloc()/lfree(). 801 * See port/threads/alloc.c for details. 802 * A bucket's size and alignment is 64 bytes. 803 */ 804 typedef struct { 805 mutex_t bucket_lock; /* protects the free list allocations */ 806 void *free_list; /* LIFO list of blocks to allocate/free */ 807 size_t chunks; /* number of 64K blocks mmap()ed last time */ 808 char pad64[64 - /* pad out to 64 bytes */ 809 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 810 } bucket_t; 811 812 #ifdef _SYSCALL32 813 typedef struct { 814 mutex_t bucket_lock; 815 caddr32_t free_list; 816 size32_t chunks; 817 char pad64[64 - /* pad out to 64 bytes */ 818 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 819 } bucket32_t; 820 #endif /* _SYSCALL32 */ 821 822 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 823 824 825 /* 826 * atexit() data structures. 827 * See port/gen/atexit.c for details. 828 */ 829 typedef void (*_exithdlr_func_t) (void); 830 831 typedef struct _exthdlr { 832 struct _exthdlr *next; /* next in handler list */ 833 _exithdlr_func_t hdlr; /* handler itself */ 834 } _exthdlr_t; 835 836 typedef struct { 837 mutex_t exitfns_lock; 838 _exthdlr_t *head; 839 void *exit_frame_monitor; 840 char exit_pad[64 - /* pad out to 64 bytes */ 841 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 842 } atexit_root_t; 843 844 #ifdef _SYSCALL32 845 typedef struct { 846 mutex_t exitfns_lock; 847 caddr32_t head; 848 caddr32_t exit_frame_monitor; 849 char exit_pad[64 - /* pad out to 64 bytes */ 850 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 851 } atexit_root32_t; 852 #endif /* _SYSCALL32 */ 853 854 855 /* 856 * This is data that is global to all link maps (uberdata, aka super-global). 857 */ 858 typedef struct uberdata { 859 pad_lock_t _link_lock; 860 pad_lock_t _ld_lock; 861 pad_lock_t _fork_lock; 862 pad_lock_t _atfork_lock; 863 pad32_lock_t _callout_lock; 864 pad32_lock_t _tdb_hash_lock; 865 tdb_sync_stats_t tdb_hash_lock_stats; 866 siguaction_t siguaction[NSIG]; 867 bucket_t bucket[NBUCKETS]; 868 atexit_root_t atexit_root; 869 tsd_metadata_t tsd_metadata; 870 tls_metadata_t tls_metadata; 871 /* 872 * Every object before this point has size and alignment of 64 bytes. 873 * Don't add any other type of data before this point. 874 */ 875 char primary_map; /* set when primary link map is initialized */ 876 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 877 char pad[2]; 878 uberflags_t uberflags; 879 queue_head_t *queue_head; 880 thr_hash_table_t *thr_hash_table; 881 uint_t hash_size; /* # of entries in thr_hash_table[] */ 882 uint_t hash_mask; /* hash_size - 1 */ 883 ulwp_t *ulwp_one; /* main thread */ 884 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 885 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 886 int nthreads; /* total number of live threads/lwps */ 887 int nzombies; /* total number of zombie threads */ 888 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 889 pid_t pid; /* the current process's pid */ 890 void (*sigacthandler)(int, siginfo_t *, void *); 891 ulwp_t *lwp_stacks; 892 ulwp_t *lwp_laststack; 893 int nfreestack; 894 int thread_stack_cache; 895 ulwp_t *ulwp_freelist; 896 ulwp_t *ulwp_lastfree; 897 ulwp_t *ulwp_replace_free; 898 ulwp_t *ulwp_replace_last; 899 atfork_t *atforklist; /* circular Q for fork handlers */ 900 robust_t **robustlocks; /* table of registered robust locks */ 901 robust_t *robustlist; /* list of registered robust locks */ 902 struct uberdata **tdb_bootstrap; 903 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 904 } uberdata_t; 905 906 #define link_lock _link_lock.pad_lock 907 #define ld_lock _ld_lock.pad_lock 908 #define fork_lock _fork_lock.pad_lock 909 #define atfork_lock _atfork_lock.pad_lock 910 #define callout_lock _callout_lock.pad_lock 911 #define tdb_hash_lock _tdb_hash_lock.pad_lock 912 913 #pragma align 64(__uberdata) 914 extern uberdata_t __uberdata; 915 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 916 extern int primary_link_map; 917 918 #define ulwp_mutex(ulwp, udp) \ 919 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 920 #define ulwp_condvar(ulwp, udp) \ 921 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 922 923 /* 924 * Grab and release the hash table lock for the specified lwp. 925 */ 926 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 927 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 928 929 #ifdef _SYSCALL32 /* needed by libc_db */ 930 931 typedef struct ulwp32 { 932 #if defined(__sparc) 933 uint32_t ul_dinstr; /* scratch space for dtrace */ 934 uint32_t ul_padsparc0[15]; 935 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 936 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 937 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 938 uint32_t ul_dreturn; /* dtrace: return %o0 */ 939 #endif 940 caddr32_t ul_self; /* pointer to self */ 941 #if defined(__x86) 942 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 943 #endif 944 caddr32_t ul_uberdata; /* uber (super-global) data */ 945 tls32_t ul_tls; /* dynamic thread-local storage base */ 946 caddr32_t ul_forw; /* forw, back all_lwps list, */ 947 caddr32_t ul_back; /* protected by link_lock */ 948 caddr32_t ul_next; /* list to keep track of stacks */ 949 caddr32_t ul_hash; /* hash chain linked list */ 950 caddr32_t ul_rval; /* return value from thr_exit() */ 951 caddr32_t ul_stk; /* mapping base of the stack */ 952 size32_t ul_mapsiz; /* mapping size of the stack */ 953 size32_t ul_guardsize; /* normally _lpagesize */ 954 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 955 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 956 stack32_t ul_ustack; /* current stack boundaries */ 957 int ul_ix; /* hash index */ 958 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 959 pri_t ul_pri; /* scheduling priority */ 960 pri_t ul_epri; /* real-time ceiling priority */ 961 char ul_policy; /* scheduling policy */ 962 char ul_cid; /* scheduling class id */ 963 union { 964 struct { 965 char cursig; /* deferred signal number */ 966 char pleasestop; /* lwp requested to stop itself */ 967 } s; 968 short curplease; /* for testing both at once */ 969 } ul_cp; 970 char ul_stop; /* reason for stopping */ 971 char ul_signalled; /* this lwp was cond_signal()d */ 972 char ul_dead; /* this lwp has called thr_exit */ 973 char ul_unwind; /* posix: unwind C++ stack */ 974 char ul_detached; /* THR_DETACHED at thread_create() */ 975 /* or pthread_detach() was called */ 976 char ul_writer; /* sleeping in rw_wrlock() */ 977 char ul_stopping; /* set by curthread: stopping self */ 978 char ul_cancel_prologue; /* for _cancel_prologue() */ 979 short ul_preempt; /* no_preempt()/preempt() */ 980 short ul_savpreempt; /* pre-existing preempt value */ 981 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 982 char ul_main; /* thread is the main thread */ 983 char ul_fork; /* thread is performing a fork */ 984 char ul_primarymap; /* primary link-map is initialized */ 985 /* per-thread copies of the corresponding global variables */ 986 uint8_t ul_max_spinners; /* thread_max_spinners */ 987 char ul_door_noreserve; /* thread_door_noreserve */ 988 char ul_queue_fifo; /* thread_queue_fifo */ 989 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 990 char ul_error_detection; /* thread_error_detection */ 991 char ul_async_safe; /* thread_async_safe */ 992 char ul_rt; /* found on an RT queue */ 993 char ul_rtqueued; /* was RT when queued */ 994 char ul_misaligned; /* thread_locks_misaligned */ 995 char ul_pad[3]; 996 int ul_adaptive_spin; /* thread_adaptive_spin */ 997 int ul_queue_spin; /* thread_queue_spin */ 998 int ul_critical; /* non-zero == in a critical region */ 999 int ul_sigdefer; /* non-zero == defer signals */ 1000 int ul_vfork; /* thread is the child of vfork() */ 1001 int ul_cancelable; /* _cancelon()/_canceloff() */ 1002 char ul_cancel_pending; /* pthread_cancel() was called */ 1003 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 1004 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 1005 char ul_save_async; /* saved copy of ul_cancel_async */ 1006 char ul_mutator; /* lwp is a mutator (java interface) */ 1007 char ul_created; /* created suspended */ 1008 char ul_replace; /* replacement; must be free()d */ 1009 uchar_t ul_nocancel; /* cancellation can't happen */ 1010 int ul_errno; /* per-thread errno */ 1011 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 1012 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 1013 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 1014 caddr32_t ul_schedctl; /* schedctl data */ 1015 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 1016 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 1017 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 1018 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 1019 td_evbuf32_t ul_td_evbuf; /* event buffer */ 1020 char ul_td_events_enable; /* event mechanism enabled */ 1021 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 1022 char ul_qtype; /* MX or CV */ 1023 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 1024 int ul_usropts; /* flags given to thr_create() */ 1025 caddr32_t ul_startpc; /* start func (thr_create()) */ 1026 caddr32_t ul_startarg; /* argument for start function */ 1027 caddr32_t ul_wchan; /* synch object when sleeping */ 1028 caddr32_t ul_link; /* sleep queue link */ 1029 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 1030 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 1031 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 1032 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 1033 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 1034 /* 0 means there is but a single entry */ 1035 union { /* single entry or pointer to array */ 1036 readlock32_t single; 1037 caddr32_t array; 1038 } ul_readlock; 1039 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 1040 /* 0 means there is but a single entry */ 1041 union { /* single entry or pointer to array */ 1042 caddr32_t single; 1043 caddr32_t array; 1044 } ul_heldlocks; 1045 /* PROBE_SUPPORT begin */ 1046 caddr32_t ul_tpdp; 1047 /* PROBE_SUPPORT end */ 1048 caddr32_t ul_siglink; /* pointer to previous context */ 1049 uint_t ul_spin_lock_spin; /* spin lock statistics */ 1050 uint_t ul_spin_lock_spin2; 1051 uint_t ul_spin_lock_sleep; 1052 uint_t ul_spin_lock_wakeup; 1053 queue_root32_t ul_queue_root; /* root of a sleep queue */ 1054 id_t ul_rtclassid; /* real-time class id */ 1055 uint_t ul_pilocks; /* count of PI locks held */ 1056 /* the following members *must* be last in the structure */ 1057 /* they are discarded when ulwp is replaced on thr_exit() */ 1058 sigset32_t ul_sigmask; /* thread's current signal mask */ 1059 sigset32_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 1060 siginfo32_t ul_siginfo; /* deferred siginfo */ 1061 mutex_t ul_spinlock; /* used when suspending/continuing */ 1062 fpuenv32_t ul_fpuenv; /* floating point state */ 1063 caddr32_t ul_sp; /* stack pointer when blocked */ 1064 #if defined(sparc) 1065 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 1066 #endif 1067 } ulwp32_t; 1068 1069 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 1070 1071 typedef struct uberdata32 { 1072 pad_lock_t _link_lock; 1073 pad_lock_t _ld_lock; 1074 pad_lock_t _fork_lock; 1075 pad_lock_t _atfork_lock; 1076 pad32_lock_t _callout_lock; 1077 pad32_lock_t _tdb_hash_lock; 1078 tdb_sync_stats_t tdb_hash_lock_stats; 1079 siguaction32_t siguaction[NSIG]; 1080 bucket32_t bucket[NBUCKETS]; 1081 atexit_root32_t atexit_root; 1082 tsd_metadata32_t tsd_metadata; 1083 tls_metadata32_t tls_metadata; 1084 char primary_map; 1085 char bucket_init; 1086 char pad[2]; 1087 uberflags_t uberflags; 1088 caddr32_t queue_head; 1089 caddr32_t thr_hash_table; 1090 uint_t hash_size; 1091 uint_t hash_mask; 1092 caddr32_t ulwp_one; 1093 caddr32_t all_lwps; 1094 caddr32_t all_zombies; 1095 int nthreads; 1096 int nzombies; 1097 int ndaemons; 1098 int pid; 1099 caddr32_t sigacthandler; 1100 caddr32_t lwp_stacks; 1101 caddr32_t lwp_laststack; 1102 int nfreestack; 1103 int thread_stack_cache; 1104 caddr32_t ulwp_freelist; 1105 caddr32_t ulwp_lastfree; 1106 caddr32_t ulwp_replace_free; 1107 caddr32_t ulwp_replace_last; 1108 caddr32_t atforklist; 1109 caddr32_t robustlocks; 1110 caddr32_t robustlist; 1111 caddr32_t tdb_bootstrap; 1112 tdb32_t tdb; 1113 } uberdata32_t; 1114 1115 #endif /* _SYSCALL32 */ 1116 1117 /* ul_stop values */ 1118 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1119 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1120 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1121 1122 /* 1123 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1124 */ 1125 1126 typedef struct _cvattr { 1127 int pshared; 1128 clockid_t clockid; 1129 } cvattr_t; 1130 1131 typedef struct _mattr { 1132 int pshared; 1133 int protocol; 1134 int prioceiling; 1135 int type; 1136 int robustness; 1137 } mattr_t; 1138 1139 typedef struct _thrattr { 1140 size_t stksize; 1141 void *stkaddr; 1142 int detachstate; 1143 int daemonstate; 1144 int scope; 1145 int prio; 1146 int policy; 1147 int inherit; 1148 size_t guardsize; 1149 } thrattr_t; 1150 1151 typedef struct _rwlattr { 1152 int pshared; 1153 } rwlattr_t; 1154 1155 /* _curthread() is inline for speed */ 1156 extern ulwp_t *_curthread(void); 1157 #define curthread (_curthread()) 1158 1159 /* this version (also inline) can be tested for NULL */ 1160 extern ulwp_t *__curthread(void); 1161 1162 /* get the current stack pointer (also inline) */ 1163 extern greg_t stkptr(void); 1164 1165 /* 1166 * Suppress __attribute__((...)) if we are not compiling with gcc 1167 */ 1168 #if !defined(__GNUC__) 1169 #define __attribute__(string) 1170 #endif 1171 1172 /* Fetch the dispatch (kernel) priority of a thread */ 1173 #define real_priority(ulwp) \ 1174 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0) 1175 1176 /* 1177 * Implementation functions. Not visible outside of the library itself. 1178 */ 1179 extern int __nanosleep(const timespec_t *, timespec_t *); 1180 extern void getgregs(ulwp_t *, gregset_t); 1181 extern void setgregs(ulwp_t *, gregset_t); 1182 extern void thr_panic(const char *); 1183 #pragma rarely_called(thr_panic) 1184 extern ulwp_t *find_lwp(thread_t); 1185 extern void finish_init(void); 1186 extern void update_sched(ulwp_t *); 1187 extern void queue_alloc(void); 1188 extern void tsd_exit(void); 1189 extern void tsd_free(ulwp_t *); 1190 extern void tls_setup(void); 1191 extern void tls_exit(void); 1192 extern void tls_free(ulwp_t *); 1193 extern void rwl_free(ulwp_t *); 1194 extern void heldlock_exit(void); 1195 extern void heldlock_free(ulwp_t *); 1196 extern void sigacthandler(int, siginfo_t *, void *); 1197 extern void signal_init(void); 1198 extern int sigequalset(const sigset_t *, const sigset_t *); 1199 extern void mutex_setup(void); 1200 extern void take_deferred_signal(int); 1201 extern void *setup_top_frame(void *, size_t, ulwp_t *); 1202 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1203 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1204 extern volatile sc_shared_t *setup_schedctl(void); 1205 extern void *lmalloc(size_t); 1206 extern void lfree(void *, size_t); 1207 extern void *libc_malloc(size_t); 1208 extern void *libc_realloc(void *, size_t); 1209 extern void libc_free(void *); 1210 extern char *libc_strdup(const char *); 1211 extern void ultos(uint64_t, int, char *); 1212 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1213 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1214 extern void thread_error(const char *); 1215 extern void grab_assert_lock(void); 1216 extern void dump_queue_statistics(void); 1217 extern void collect_queue_statistics(void); 1218 extern void record_spin_locks(ulwp_t *); 1219 extern void remember_lock(mutex_t *); 1220 extern void forget_lock(mutex_t *); 1221 extern void register_lock(mutex_t *); 1222 extern void unregister_locks(void); 1223 #if defined(__sparc) 1224 extern void _flush_windows(void); 1225 #else 1226 #define _flush_windows() 1227 #endif 1228 extern void set_curthread(void *); 1229 1230 /* 1231 * Utility function used when waking up many threads (more than MAXLWPS) 1232 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1233 */ 1234 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1235 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1236 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1237 1238 /* enter a critical section */ 1239 #define enter_critical(self) (self->ul_critical++) 1240 1241 /* exit a critical section, take deferred actions if necessary */ 1242 extern void do_exit_critical(void); 1243 #define exit_critical(self) \ 1244 (void) (self->ul_critical--, \ 1245 ((self->ul_curplease && self->ul_critical == 0)? \ 1246 (do_exit_critical(), 0) : 0)) 1247 1248 /* 1249 * Like enter_critical()/exit_critical() but just for deferring signals. 1250 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1251 * calling application functions like constructors and destructors. 1252 * Care must be taken if the application function attempts to set 1253 * the signal mask while a deferred signal is present; the setting 1254 * of the signal mask must also be deferred. 1255 */ 1256 #define sigoff(self) (self->ul_sigdefer++) 1257 extern void sigon(ulwp_t *); 1258 1259 /* these are exported functions */ 1260 extern void _sigoff(void); 1261 extern void _sigon(void); 1262 1263 #define sigorset(s1, s2) \ 1264 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1265 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1266 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1267 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1268 1269 #define sigandset(s1, s2) \ 1270 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1271 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1272 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1273 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1274 1275 #define sigdiffset(s1, s2) \ 1276 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1277 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1278 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1279 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1280 1281 #define delete_reserved_signals(s) \ 1282 (((s)->__sigbits[0] &= MASKSET0), \ 1283 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1284 ((s)->__sigbits[2] = 0), \ 1285 ((s)->__sigbits[3] = 0)) 1286 1287 extern void block_all_signals(ulwp_t *self); 1288 1289 /* 1290 * When restoring the signal mask after having previously called 1291 * block_all_signals(), if we have a deferred signal present then 1292 * do nothing other than ASSERT() that we are in a critical region. 1293 * The signal mask will be set when we emerge from the critical region 1294 * and call take_deferred_signal(). There is no race condition here 1295 * because the kernel currently has all signals blocked for this thread. 1296 */ 1297 #define restore_signals(self) \ 1298 ((void) ((self)->ul_cursig? \ 1299 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1300 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask, NULL))) 1301 1302 extern void set_cancel_pending_flag(ulwp_t *, int); 1303 extern void set_cancel_eintr_flag(ulwp_t *); 1304 extern void set_parking_flag(ulwp_t *, int); 1305 extern int cancel_active(void); 1306 1307 extern void *_thrp_setup(ulwp_t *); 1308 extern void _fpinherit(ulwp_t *); 1309 extern void _lwp_start(void); 1310 extern void _lwp_terminate(void); 1311 extern void lmutex_lock(mutex_t *); 1312 extern void lmutex_unlock(mutex_t *); 1313 extern void lrw_rdlock(rwlock_t *); 1314 extern void lrw_wrlock(rwlock_t *); 1315 extern void lrw_unlock(rwlock_t *); 1316 extern void sig_mutex_lock(mutex_t *); 1317 extern void sig_mutex_unlock(mutex_t *); 1318 extern int sig_mutex_trylock(mutex_t *); 1319 extern int sig_cond_wait(cond_t *, mutex_t *); 1320 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1321 extern void cancel_safe_mutex_lock(mutex_t *); 1322 extern void cancel_safe_mutex_unlock(mutex_t *); 1323 extern int cancel_safe_mutex_trylock(mutex_t *); 1324 extern void _prefork_handler(void); 1325 extern void _postfork_parent_handler(void); 1326 extern void _postfork_child_handler(void); 1327 extern void postfork1_child(void); 1328 extern void postfork1_child_aio(void); 1329 extern void postfork1_child_sigev_aio(void); 1330 extern void postfork1_child_sigev_mq(void); 1331 extern void postfork1_child_sigev_timer(void); 1332 extern void postfork1_child_tpool(void); 1333 extern void fork_lock_enter(void); 1334 extern void fork_lock_exit(void); 1335 extern void suspend_fork(void); 1336 extern void continue_fork(int); 1337 extern void do_sigcancel(void); 1338 extern void setup_cancelsig(int); 1339 extern void init_sigev_thread(void); 1340 extern void init_aio(void); 1341 extern void _cancelon(void); 1342 extern void _canceloff(void); 1343 extern void _canceloff_nocancel(void); 1344 extern void _cancel_prologue(void); 1345 extern void _cancel_epilogue(void); 1346 extern void no_preempt(ulwp_t *); 1347 extern void preempt(ulwp_t *); 1348 extern void _thrp_unwind(void *); 1349 1350 extern pid_t __forkx(int); 1351 extern pid_t __forkallx(int); 1352 extern int __open(const char *, int, ...); 1353 extern int __close(int); 1354 extern ssize_t __read(int, void *, size_t); 1355 extern ssize_t __write(int, const void *, size_t); 1356 extern int __fcntl(int, int, ...); 1357 extern int __lwp_continue(lwpid_t); 1358 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1359 extern int ___lwp_suspend(lwpid_t); 1360 extern int lwp_wait(lwpid_t, lwpid_t *); 1361 extern int __lwp_wait(lwpid_t, lwpid_t *); 1362 extern int __lwp_detach(lwpid_t); 1363 extern sc_shared_t *__schedctl(void); 1364 1365 /* actual system call traps */ 1366 extern int __setcontext(const ucontext_t *); 1367 extern int __getcontext(ucontext_t *); 1368 extern int __clock_gettime(clockid_t, timespec_t *); 1369 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1370 extern void hrt2ts(hrtime_t, timespec_t *); 1371 1372 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1373 extern int __lwp_sigmask(int, const sigset_t *, sigset_t *); 1374 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1375 extern caddr_t __sighndlrend; 1376 #pragma unknown_control_flow(__sighndlr) 1377 1378 /* belongs in <pthread.h> */ 1379 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1380 #define PTHREAD_CREATE_NONDAEMON_NP 0 1381 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1382 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1383 1384 extern int mutex_held(mutex_t *); 1385 extern int mutex_lock_internal(mutex_t *, timespec_t *, int); 1386 extern int mutex_unlock_internal(mutex_t *, int); 1387 1388 /* not cancellation points: */ 1389 extern int __cond_wait(cond_t *, mutex_t *); 1390 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1391 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1392 1393 extern int rw_read_held(rwlock_t *); 1394 extern int rw_write_held(rwlock_t *); 1395 1396 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1397 thread_t *, size_t); 1398 extern int _thrp_suspend(thread_t, uchar_t); 1399 extern int _thrp_continue(thread_t, uchar_t); 1400 1401 extern void _thrp_terminate(void *); 1402 extern void _thrp_exit(void); 1403 1404 extern const pcclass_t *get_info_by_class(id_t); 1405 extern const pcclass_t *get_info_by_policy(int); 1406 extern const thrattr_t *def_thrattr(void); 1407 extern id_t setparam(idtype_t, id_t, int, int); 1408 extern id_t setprio(idtype_t, id_t, int, int *); 1409 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *); 1410 1411 /* 1412 * System call wrappers (direct interfaces to the kernel) 1413 */ 1414 extern int ___lwp_mutex_register(mutex_t *, mutex_t **); 1415 extern int ___lwp_mutex_trylock(mutex_t *); 1416 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *); 1417 extern int ___lwp_mutex_unlock(mutex_t *); 1418 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1419 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1420 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1421 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1422 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1423 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1424 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1425 extern int __lwp_rwlock_unlock(rwlock_t *); 1426 extern int __lwp_park(timespec_t *, lwpid_t); 1427 extern int __lwp_unpark(lwpid_t); 1428 extern int __lwp_unpark_all(lwpid_t *, int); 1429 #if defined(__x86) 1430 extern int ___lwp_private(int, int, void *); 1431 #endif /* __x86 */ 1432 1433 /* 1434 * inlines 1435 */ 1436 extern int set_lock_byte(volatile uint8_t *); 1437 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1438 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1439 extern void atomic_inc_32(volatile uint32_t *); 1440 extern void atomic_dec_32(volatile uint32_t *); 1441 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1442 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1443 #if defined(__sparc) 1444 extern ulong_t caller(void); 1445 extern ulong_t getfp(void); 1446 #endif /* __sparc */ 1447 1448 #include "thr_inlines.h" 1449 1450 #endif /* _THR_UBERDATA_H */ 1451