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 2010 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_rtld; /* thread is running inside ld.so.1 */ 613 int ul_usropts; /* flags given to thr_create() */ 614 void *(*ul_startpc)(void *); /* start func (thr_create()) */ 615 void *ul_startarg; /* argument for start function */ 616 void *ul_wchan; /* synch object when sleeping */ 617 struct ulwp *ul_link; /* sleep queue link */ 618 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */ 619 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */ 620 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */ 621 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 622 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 623 /* 0 means there is but a single entry */ 624 union { /* single entry or pointer to array */ 625 readlock_t single; 626 readlock_t *array; 627 } ul_readlock; 628 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 629 /* 0 means there is but a single entry */ 630 union { /* single entry or pointer to array */ 631 mutex_t *single; 632 mutex_t **array; 633 } ul_heldlocks; 634 /* PROBE_SUPPORT begin */ 635 void *ul_tpdp; 636 /* PROBE_SUPPORT end */ 637 ucontext_t *ul_siglink; /* pointer to previous context */ 638 uint_t ul_spin_lock_spin; /* spin lock statistics */ 639 uint_t ul_spin_lock_spin2; 640 uint_t ul_spin_lock_sleep; 641 uint_t ul_spin_lock_wakeup; 642 queue_root_t ul_queue_root; /* root of a sleep queue */ 643 id_t ul_rtclassid; /* real-time class id */ 644 uint_t ul_pilocks; /* count of PI locks held */ 645 /* the following members *must* be last in the structure */ 646 /* they are discarded when ulwp is replaced on thr_exit() */ 647 sigset_t ul_sigmask; /* thread's current signal mask */ 648 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 649 siginfo_t ul_siginfo; /* deferred siginfo */ 650 mutex_t ul_spinlock; /* used when suspending/continuing */ 651 fpuenv_t ul_fpuenv; /* floating point state */ 652 uintptr_t ul_sp; /* stack pointer when blocked */ 653 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */ 654 #if defined(sparc) 655 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */ 656 #endif 657 } ulwp_t; 658 659 #define ul_cursig ul_cp.s.cursig /* deferred signal number */ 660 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */ 661 #define ul_curplease ul_cp.curplease /* for testing both at once */ 662 663 /* 664 * This is the size of a replacement ulwp, retained only for the benefit 665 * of thr_join(). The trailing members are unneeded for this purpose. 666 */ 667 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask) 668 669 /* 670 * Definitions for static initialization of signal sets, 671 * plus some sneaky optimizations in various places. 672 */ 673 674 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1))) 675 676 #if (MAXSIG > (2 * 32) && MAXSIG <= (3 * 32)) 677 #define FILLSET0 0xffffffffu 678 #define FILLSET1 0xffffffffu 679 #define FILLSET2 ((1u << (MAXSIG - 64)) - 1) 680 #define FILLSET3 0 681 #else 682 #error "fix me: MAXSIG out of bounds" 683 #endif 684 685 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 686 #define CANTMASK1 0 687 #define CANTMASK2 0 688 #define CANTMASK3 0 689 690 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 691 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 692 #define MASKSET2 (FILLSET2 & ~CANTMASK2) 693 #define MASKSET3 (FILLSET3 & ~CANTMASK3) 694 695 extern const sigset_t maskset; /* set of all maskable signals */ 696 697 extern int thread_adaptive_spin; 698 extern uint_t thread_max_spinners; 699 extern int thread_queue_spin; 700 extern int thread_queue_fifo; 701 extern int thread_queue_dump; 702 extern int thread_cond_wait_defer; 703 extern int thread_async_safe; 704 extern int thread_queue_verify; 705 706 /* 707 * pthread_atfork() related data, used to store atfork handlers. 708 */ 709 typedef struct atfork { 710 struct atfork *forw; /* forward pointer */ 711 struct atfork *back; /* backward pointer */ 712 void (*prepare)(void); /* pre-fork handler */ 713 void (*parent)(void); /* post-fork parent handler */ 714 void (*child)(void); /* post-fork child handler */ 715 } atfork_t; 716 717 /* 718 * Element in the table and in the list of registered process 719 * robust locks. We keep track of these to make sure that we 720 * only call ___lwp_mutex_register() once for each such lock 721 * after it is first mapped in (or newly mapped in). 722 */ 723 typedef struct robust { 724 struct robust *robust_next; /* hash table list */ 725 struct robust *robust_list; /* global list */ 726 mutex_t *robust_lock; 727 } robust_t; 728 729 /* 730 * Invalid address, used to mark an unused element in the hash table. 731 */ 732 #define INVALID_ADDR ((void *)(uintptr_t)(-1L)) 733 734 /* 735 * Parameters of the lock registration hash table. 736 */ 737 #define LOCKSHIFT 15 /* number of hashing bits */ 738 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<15 == 32K) */ 739 #define LOCK_HASH(addr) (uint_t) \ 740 ((((uintptr_t)(addr) >> 3) \ 741 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 742 & (LOCKHASHSZ - 1)) 743 744 /* 745 * Make our hot locks reside on private cache lines (64 bytes). 746 */ 747 typedef struct { 748 mutex_t pad_lock; 749 char pad_pad[64 - sizeof (mutex_t)]; 750 } pad_lock_t; 751 752 /* 753 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 754 */ 755 typedef struct { 756 mutex_t pad_lock; 757 char pad_pad[32 - sizeof (mutex_t)]; 758 } pad32_lock_t; 759 760 /* 761 * The threads hash table is used for fast lookup and locking of an active 762 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 763 * thr_hash_table_t structures, where N == 1 before the main thread creates 764 * the first additional thread and N == 1024 afterwards. Each element of the 765 * table is 64 bytes in size and alignment to reduce cache conflicts. 766 */ 767 typedef struct { 768 mutex_t hash_lock; /* lock per bucket */ 769 cond_t hash_cond; /* convar per bucket */ 770 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 771 char hash_pad[64 - /* pad out to 64 bytes */ 772 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 773 } thr_hash_table_t; 774 775 #ifdef _SYSCALL32 776 typedef struct { 777 mutex_t hash_lock; 778 cond_t hash_cond; 779 caddr32_t hash_bucket; 780 char hash_pad[64 - 781 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 782 } thr_hash_table32_t; 783 #endif /* _SYSCALL32 */ 784 785 786 /* 787 * siguaction members have 128-byte size and 64-byte alignment. 788 * We know that sizeof (struct sigaction) is 32 bytes for both 789 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 790 */ 791 typedef struct { 792 rwlock_t sig_lock; 793 struct sigaction sig_uaction; 794 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 795 } siguaction_t; 796 797 #ifdef _SYSCALL32 798 typedef struct { 799 rwlock_t sig_lock; 800 struct sigaction32 sig_uaction; 801 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 802 } siguaction32_t; 803 #endif /* _SYSCALL32 */ 804 805 806 /* 807 * Bucket structures, used by lmalloc()/lfree(). 808 * See port/threads/alloc.c for details. 809 * A bucket's size and alignment is 64 bytes. 810 */ 811 typedef struct { 812 mutex_t bucket_lock; /* protects the free list allocations */ 813 void *free_list; /* LIFO list of blocks to allocate/free */ 814 size_t chunks; /* number of 64K blocks mmap()ed last time */ 815 char pad64[64 - /* pad out to 64 bytes */ 816 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 817 } bucket_t; 818 819 #ifdef _SYSCALL32 820 typedef struct { 821 mutex_t bucket_lock; 822 caddr32_t free_list; 823 size32_t chunks; 824 char pad64[64 - /* pad out to 64 bytes */ 825 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 826 } bucket32_t; 827 #endif /* _SYSCALL32 */ 828 829 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 830 831 832 /* 833 * atexit() data structures. 834 * See port/gen/atexit.c for details. 835 */ 836 typedef void (*_exithdlr_func_t) (void); 837 838 typedef struct _exthdlr { 839 struct _exthdlr *next; /* next in handler list */ 840 _exithdlr_func_t hdlr; /* handler itself */ 841 } _exthdlr_t; 842 843 typedef struct { 844 mutex_t exitfns_lock; 845 _exthdlr_t *head; 846 void *exit_frame_monitor; 847 char exit_pad[64 - /* pad out to 64 bytes */ 848 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 849 } atexit_root_t; 850 851 #ifdef _SYSCALL32 852 typedef struct { 853 mutex_t exitfns_lock; 854 caddr32_t head; 855 caddr32_t exit_frame_monitor; 856 char exit_pad[64 - /* pad out to 64 bytes */ 857 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 858 } atexit_root32_t; 859 #endif /* _SYSCALL32 */ 860 861 862 /* 863 * This is data that is global to all link maps (uberdata, aka super-global). 864 */ 865 typedef struct uberdata { 866 pad_lock_t _link_lock; 867 pad_lock_t _ld_lock; 868 pad_lock_t _fork_lock; 869 pad_lock_t _atfork_lock; 870 pad32_lock_t _callout_lock; 871 pad32_lock_t _tdb_hash_lock; 872 tdb_sync_stats_t tdb_hash_lock_stats; 873 siguaction_t siguaction[NSIG]; 874 bucket_t bucket[NBUCKETS]; 875 atexit_root_t atexit_root; 876 tsd_metadata_t tsd_metadata; 877 tls_metadata_t tls_metadata; 878 /* 879 * Every object before this point has size and alignment of 64 bytes. 880 * Don't add any other type of data before this point. 881 */ 882 char primary_map; /* set when primary link map is initialized */ 883 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 884 char pad[2]; 885 uberflags_t uberflags; 886 queue_head_t *queue_head; 887 thr_hash_table_t *thr_hash_table; 888 uint_t hash_size; /* # of entries in thr_hash_table[] */ 889 uint_t hash_mask; /* hash_size - 1 */ 890 ulwp_t *ulwp_one; /* main thread */ 891 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 892 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 893 int nthreads; /* total number of live threads/lwps */ 894 int nzombies; /* total number of zombie threads */ 895 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 896 pid_t pid; /* the current process's pid */ 897 void (*sigacthandler)(int, siginfo_t *, void *); 898 ulwp_t *lwp_stacks; 899 ulwp_t *lwp_laststack; 900 int nfreestack; 901 int thread_stack_cache; 902 ulwp_t *ulwp_freelist; 903 ulwp_t *ulwp_lastfree; 904 ulwp_t *ulwp_replace_free; 905 ulwp_t *ulwp_replace_last; 906 atfork_t *atforklist; /* circular Q for fork handlers */ 907 robust_t **robustlocks; /* table of registered robust locks */ 908 robust_t *robustlist; /* list of registered robust locks */ 909 struct uberdata **tdb_bootstrap; 910 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 911 } uberdata_t; 912 913 #define link_lock _link_lock.pad_lock 914 #define ld_lock _ld_lock.pad_lock 915 #define fork_lock _fork_lock.pad_lock 916 #define atfork_lock _atfork_lock.pad_lock 917 #define callout_lock _callout_lock.pad_lock 918 #define tdb_hash_lock _tdb_hash_lock.pad_lock 919 920 #pragma align 64(__uberdata) 921 extern uberdata_t __uberdata; 922 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 923 extern int primary_link_map; 924 925 #define ulwp_mutex(ulwp, udp) \ 926 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 927 #define ulwp_condvar(ulwp, udp) \ 928 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 929 930 /* 931 * Grab and release the hash table lock for the specified lwp. 932 */ 933 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 934 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 935 936 #ifdef _SYSCALL32 /* needed by libc_db */ 937 938 typedef struct ulwp32 { 939 #if defined(__sparc) 940 uint32_t ul_dinstr; /* scratch space for dtrace */ 941 uint32_t ul_padsparc0[15]; 942 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 943 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 944 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 945 uint32_t ul_dreturn; /* dtrace: return %o0 */ 946 #endif 947 caddr32_t ul_self; /* pointer to self */ 948 #if defined(__x86) 949 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 950 #endif 951 caddr32_t ul_uberdata; /* uber (super-global) data */ 952 tls32_t ul_tls; /* dynamic thread-local storage base */ 953 caddr32_t ul_forw; /* forw, back all_lwps list, */ 954 caddr32_t ul_back; /* protected by link_lock */ 955 caddr32_t ul_next; /* list to keep track of stacks */ 956 caddr32_t ul_hash; /* hash chain linked list */ 957 caddr32_t ul_rval; /* return value from thr_exit() */ 958 caddr32_t ul_stk; /* mapping base of the stack */ 959 size32_t ul_mapsiz; /* mapping size of the stack */ 960 size32_t ul_guardsize; /* normally _lpagesize */ 961 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 962 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 963 stack32_t ul_ustack; /* current stack boundaries */ 964 int ul_ix; /* hash index */ 965 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 966 pri_t ul_pri; /* scheduling priority */ 967 pri_t ul_epri; /* real-time ceiling priority */ 968 char ul_policy; /* scheduling policy */ 969 char ul_cid; /* scheduling class id */ 970 union { 971 struct { 972 char cursig; /* deferred signal number */ 973 char pleasestop; /* lwp requested to stop itself */ 974 } s; 975 short curplease; /* for testing both at once */ 976 } ul_cp; 977 char ul_stop; /* reason for stopping */ 978 char ul_signalled; /* this lwp was cond_signal()d */ 979 char ul_dead; /* this lwp has called thr_exit */ 980 char ul_unwind; /* posix: unwind C++ stack */ 981 char ul_detached; /* THR_DETACHED at thread_create() */ 982 /* or pthread_detach() was called */ 983 char ul_writer; /* sleeping in rw_wrlock() */ 984 char ul_stopping; /* set by curthread: stopping self */ 985 char ul_cancel_prologue; /* for _cancel_prologue() */ 986 short ul_preempt; /* no_preempt()/preempt() */ 987 short ul_savpreempt; /* pre-existing preempt value */ 988 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 989 char ul_main; /* thread is the main thread */ 990 char ul_fork; /* thread is performing a fork */ 991 char ul_primarymap; /* primary link-map is initialized */ 992 /* per-thread copies of the corresponding global variables */ 993 uint8_t ul_max_spinners; /* thread_max_spinners */ 994 char ul_door_noreserve; /* thread_door_noreserve */ 995 char ul_queue_fifo; /* thread_queue_fifo */ 996 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 997 char ul_error_detection; /* thread_error_detection */ 998 char ul_async_safe; /* thread_async_safe */ 999 char ul_rt; /* found on an RT queue */ 1000 char ul_rtqueued; /* was RT when queued */ 1001 char ul_misaligned; /* thread_locks_misaligned */ 1002 char ul_pad[3]; 1003 int ul_adaptive_spin; /* thread_adaptive_spin */ 1004 int ul_queue_spin; /* thread_queue_spin */ 1005 int ul_critical; /* non-zero == in a critical region */ 1006 int ul_sigdefer; /* non-zero == defer signals */ 1007 int ul_vfork; /* thread is the child of vfork() */ 1008 int ul_cancelable; /* _cancelon()/_canceloff() */ 1009 char ul_cancel_pending; /* pthread_cancel() was called */ 1010 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 1011 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 1012 char ul_save_async; /* saved copy of ul_cancel_async */ 1013 char ul_mutator; /* lwp is a mutator (java interface) */ 1014 char ul_created; /* created suspended */ 1015 char ul_replace; /* replacement; must be free()d */ 1016 uchar_t ul_nocancel; /* cancellation can't happen */ 1017 int ul_errno; /* per-thread errno */ 1018 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 1019 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 1020 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 1021 caddr32_t ul_schedctl; /* schedctl data */ 1022 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 1023 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 1024 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 1025 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 1026 td_evbuf32_t ul_td_evbuf; /* event buffer */ 1027 char ul_td_events_enable; /* event mechanism enabled */ 1028 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 1029 char ul_qtype; /* MX or CV */ 1030 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 1031 int ul_rtld; /* thread is running inside ld.so.1 */ 1032 int ul_usropts; /* flags given to thr_create() */ 1033 caddr32_t ul_startpc; /* start func (thr_create()) */ 1034 caddr32_t ul_startarg; /* argument for start function */ 1035 caddr32_t ul_wchan; /* synch object when sleeping */ 1036 caddr32_t ul_link; /* sleep queue link */ 1037 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 1038 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 1039 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 1040 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 1041 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 1042 /* 0 means there is but a single entry */ 1043 union { /* single entry or pointer to array */ 1044 readlock32_t single; 1045 caddr32_t array; 1046 } ul_readlock; 1047 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 1048 /* 0 means there is but a single entry */ 1049 union { /* single entry or pointer to array */ 1050 caddr32_t single; 1051 caddr32_t array; 1052 } ul_heldlocks; 1053 /* PROBE_SUPPORT begin */ 1054 caddr32_t ul_tpdp; 1055 /* PROBE_SUPPORT end */ 1056 caddr32_t ul_siglink; /* pointer to previous context */ 1057 uint_t ul_spin_lock_spin; /* spin lock statistics */ 1058 uint_t ul_spin_lock_spin2; 1059 uint_t ul_spin_lock_sleep; 1060 uint_t ul_spin_lock_wakeup; 1061 queue_root32_t ul_queue_root; /* root of a sleep queue */ 1062 id_t ul_rtclassid; /* real-time class id */ 1063 uint_t ul_pilocks; /* count of PI locks held */ 1064 /* the following members *must* be last in the structure */ 1065 /* they are discarded when ulwp is replaced on thr_exit() */ 1066 sigset_t ul_sigmask; /* thread's current signal mask */ 1067 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 1068 siginfo32_t ul_siginfo; /* deferred siginfo */ 1069 mutex_t ul_spinlock; /* used when suspending/continuing */ 1070 fpuenv32_t ul_fpuenv; /* floating point state */ 1071 caddr32_t ul_sp; /* stack pointer when blocked */ 1072 #if defined(sparc) 1073 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 1074 #endif 1075 } ulwp32_t; 1076 1077 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 1078 1079 typedef struct uberdata32 { 1080 pad_lock_t _link_lock; 1081 pad_lock_t _ld_lock; 1082 pad_lock_t _fork_lock; 1083 pad_lock_t _atfork_lock; 1084 pad32_lock_t _callout_lock; 1085 pad32_lock_t _tdb_hash_lock; 1086 tdb_sync_stats_t tdb_hash_lock_stats; 1087 siguaction32_t siguaction[NSIG]; 1088 bucket32_t bucket[NBUCKETS]; 1089 atexit_root32_t atexit_root; 1090 tsd_metadata32_t tsd_metadata; 1091 tls_metadata32_t tls_metadata; 1092 char primary_map; 1093 char bucket_init; 1094 char pad[2]; 1095 uberflags_t uberflags; 1096 caddr32_t queue_head; 1097 caddr32_t thr_hash_table; 1098 uint_t hash_size; 1099 uint_t hash_mask; 1100 caddr32_t ulwp_one; 1101 caddr32_t all_lwps; 1102 caddr32_t all_zombies; 1103 int nthreads; 1104 int nzombies; 1105 int ndaemons; 1106 int pid; 1107 caddr32_t sigacthandler; 1108 caddr32_t lwp_stacks; 1109 caddr32_t lwp_laststack; 1110 int nfreestack; 1111 int thread_stack_cache; 1112 caddr32_t ulwp_freelist; 1113 caddr32_t ulwp_lastfree; 1114 caddr32_t ulwp_replace_free; 1115 caddr32_t ulwp_replace_last; 1116 caddr32_t atforklist; 1117 caddr32_t robustlocks; 1118 caddr32_t robustlist; 1119 caddr32_t tdb_bootstrap; 1120 tdb32_t tdb; 1121 } uberdata32_t; 1122 1123 #endif /* _SYSCALL32 */ 1124 1125 /* ul_stop values */ 1126 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1127 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1128 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1129 1130 /* 1131 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1132 */ 1133 1134 typedef struct _cvattr { 1135 int pshared; 1136 clockid_t clockid; 1137 } cvattr_t; 1138 1139 typedef struct _mattr { 1140 int pshared; 1141 int protocol; 1142 int prioceiling; 1143 int type; 1144 int robustness; 1145 } mattr_t; 1146 1147 typedef struct _thrattr { 1148 size_t stksize; 1149 void *stkaddr; 1150 int detachstate; 1151 int daemonstate; 1152 int scope; 1153 int prio; 1154 int policy; 1155 int inherit; 1156 size_t guardsize; 1157 } thrattr_t; 1158 1159 typedef struct _rwlattr { 1160 int pshared; 1161 } rwlattr_t; 1162 1163 /* _curthread() is inline for speed */ 1164 extern ulwp_t *_curthread(void); 1165 #define curthread (_curthread()) 1166 1167 /* this version (also inline) can be tested for NULL */ 1168 extern ulwp_t *__curthread(void); 1169 1170 /* get the current stack pointer (also inline) */ 1171 extern greg_t stkptr(void); 1172 1173 /* 1174 * Suppress __attribute__((...)) if we are not compiling with gcc 1175 */ 1176 #if !defined(__GNUC__) 1177 #define __attribute__(string) 1178 #endif 1179 1180 /* Fetch the dispatch (kernel) priority of a thread */ 1181 #define real_priority(ulwp) \ 1182 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0) 1183 1184 /* 1185 * Implementation functions. Not visible outside of the library itself. 1186 */ 1187 extern int __nanosleep(const timespec_t *, timespec_t *); 1188 extern void getgregs(ulwp_t *, gregset_t); 1189 extern void setgregs(ulwp_t *, gregset_t); 1190 extern void thr_panic(const char *); 1191 #pragma rarely_called(thr_panic) 1192 extern ulwp_t *find_lwp(thread_t); 1193 extern void finish_init(void); 1194 extern void update_sched(ulwp_t *); 1195 extern void queue_alloc(void); 1196 extern void tsd_exit(void); 1197 extern void tsd_free(ulwp_t *); 1198 extern void tls_setup(void); 1199 extern void tls_exit(void); 1200 extern void tls_free(ulwp_t *); 1201 extern void rwl_free(ulwp_t *); 1202 extern void heldlock_exit(void); 1203 extern void heldlock_free(ulwp_t *); 1204 extern void sigacthandler(int, siginfo_t *, void *); 1205 extern void signal_init(void); 1206 extern int sigequalset(const sigset_t *, const sigset_t *); 1207 extern void mutex_setup(void); 1208 extern void take_deferred_signal(int); 1209 extern void *setup_top_frame(void *, size_t, ulwp_t *); 1210 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1211 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1212 extern volatile sc_shared_t *setup_schedctl(void); 1213 extern void *lmalloc(size_t); 1214 extern void lfree(void *, size_t); 1215 extern void *libc_malloc(size_t); 1216 extern void *libc_realloc(void *, size_t); 1217 extern void libc_free(void *); 1218 extern char *libc_strdup(const char *); 1219 extern void ultos(uint64_t, int, char *); 1220 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1221 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1222 extern void thread_error(const char *); 1223 extern void grab_assert_lock(void); 1224 extern void dump_queue_statistics(void); 1225 extern void collect_queue_statistics(void); 1226 extern void record_spin_locks(ulwp_t *); 1227 extern void remember_lock(mutex_t *); 1228 extern void forget_lock(mutex_t *); 1229 extern void register_lock(mutex_t *); 1230 extern void unregister_locks(void); 1231 #if defined(__sparc) 1232 extern void _flush_windows(void); 1233 #else 1234 #define _flush_windows() 1235 #endif 1236 extern void set_curthread(void *); 1237 1238 /* 1239 * Utility function used when waking up many threads (more than MAXLWPS) 1240 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1241 */ 1242 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1243 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1244 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1245 1246 /* enter a critical section */ 1247 #define enter_critical(self) (self->ul_critical++) 1248 1249 /* exit a critical section, take deferred actions if necessary */ 1250 extern void do_exit_critical(void); 1251 #define exit_critical(self) \ 1252 (void) (self->ul_critical--, \ 1253 ((self->ul_curplease && self->ul_critical == 0)? \ 1254 (do_exit_critical(), 0) : 0)) 1255 1256 /* 1257 * Like enter_critical()/exit_critical() but just for deferring signals. 1258 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1259 * calling application functions like constructors and destructors. 1260 * Care must be taken if the application function attempts to set 1261 * the signal mask while a deferred signal is present; the setting 1262 * of the signal mask must also be deferred. 1263 */ 1264 #define sigoff(self) (self->ul_sigdefer++) 1265 #define sigon(self) \ 1266 (void) ((--self->ul_sigdefer == 0 && \ 1267 self->ul_curplease && self->ul_critical == 0)? \ 1268 (do_exit_critical(), 0) : 0) 1269 1270 /* these are exported functions */ 1271 extern void _sigoff(void); 1272 extern void _sigon(void); 1273 1274 #define sigorset(s1, s2) \ 1275 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1276 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1277 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1278 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1279 1280 #define sigandset(s1, s2) \ 1281 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1282 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1283 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1284 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1285 1286 #define sigdiffset(s1, s2) \ 1287 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1288 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1289 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1290 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1291 1292 #define delete_reserved_signals(s) \ 1293 (((s)->__sigbits[0] &= MASKSET0), \ 1294 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1295 ((s)->__sigbits[2] &= MASKSET2), \ 1296 ((s)->__sigbits[3] &= MASKSET3)) 1297 1298 extern void block_all_signals(ulwp_t *self); 1299 1300 /* 1301 * When restoring the signal mask after having previously called 1302 * block_all_signals(), if we have a deferred signal present then 1303 * do nothing other than ASSERT() that we are in a critical region. 1304 * The signal mask will be set when we emerge from the critical region 1305 * and call take_deferred_signal(). There is no race condition here 1306 * because the kernel currently has all signals blocked for this thread. 1307 */ 1308 #define restore_signals(self) \ 1309 ((void) ((self)->ul_cursig? \ 1310 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1311 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask))) 1312 1313 extern void set_cancel_pending_flag(ulwp_t *, int); 1314 extern void set_cancel_eintr_flag(ulwp_t *); 1315 extern void set_parking_flag(ulwp_t *, int); 1316 extern int cancel_active(void); 1317 1318 extern void *_thrp_setup(ulwp_t *); 1319 extern void _fpinherit(ulwp_t *); 1320 extern void _lwp_start(void); 1321 extern void _lwp_terminate(void); 1322 extern void lmutex_lock(mutex_t *); 1323 extern void lmutex_unlock(mutex_t *); 1324 extern void lrw_rdlock(rwlock_t *); 1325 extern void lrw_wrlock(rwlock_t *); 1326 extern void lrw_unlock(rwlock_t *); 1327 extern void sig_mutex_lock(mutex_t *); 1328 extern void sig_mutex_unlock(mutex_t *); 1329 extern int sig_mutex_trylock(mutex_t *); 1330 extern int sig_cond_wait(cond_t *, mutex_t *); 1331 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1332 extern void cancel_safe_mutex_lock(mutex_t *); 1333 extern void cancel_safe_mutex_unlock(mutex_t *); 1334 extern int cancel_safe_mutex_trylock(mutex_t *); 1335 extern void _prefork_handler(void); 1336 extern void _postfork_parent_handler(void); 1337 extern void _postfork_child_handler(void); 1338 extern void postfork1_child(void); 1339 extern void postfork1_child_aio(void); 1340 extern void postfork1_child_sigev_aio(void); 1341 extern void postfork1_child_sigev_mq(void); 1342 extern void postfork1_child_sigev_timer(void); 1343 extern void postfork1_child_tpool(void); 1344 extern void fork_lock_enter(void); 1345 extern void fork_lock_exit(void); 1346 extern void suspend_fork(void); 1347 extern void continue_fork(int); 1348 extern void do_sigcancel(void); 1349 extern void setup_cancelsig(int); 1350 extern void init_sigev_thread(void); 1351 extern void init_aio(void); 1352 extern void _cancelon(void); 1353 extern void _canceloff(void); 1354 extern void _canceloff_nocancel(void); 1355 extern void _cancel_prologue(void); 1356 extern void _cancel_epilogue(void); 1357 extern void no_preempt(ulwp_t *); 1358 extern void preempt(ulwp_t *); 1359 extern void _thrp_unwind(void *); 1360 1361 extern pid_t __forkx(int); 1362 extern pid_t __forkallx(int); 1363 extern int __open(const char *, int, mode_t); 1364 extern int __open64(const char *, int, mode_t); 1365 extern int __openat(int, const char *, int, mode_t); 1366 extern int __openat64(int, const char *, int, mode_t); 1367 extern int __close(int); 1368 extern ssize_t __read(int, void *, size_t); 1369 extern ssize_t __write(int, const void *, size_t); 1370 extern int __fcntl(int, int, ...); 1371 extern int __lwp_continue(lwpid_t); 1372 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1373 extern int ___lwp_suspend(lwpid_t); 1374 extern int lwp_wait(lwpid_t, lwpid_t *); 1375 extern int __lwp_wait(lwpid_t, lwpid_t *); 1376 extern int __lwp_detach(lwpid_t); 1377 extern sc_shared_t *__schedctl(void); 1378 1379 /* actual system call traps */ 1380 extern int __setcontext(const ucontext_t *); 1381 extern int __getcontext(ucontext_t *); 1382 extern int __clock_gettime(clockid_t, timespec_t *); 1383 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1384 extern void hrt2ts(hrtime_t, timespec_t *); 1385 1386 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1387 extern int __sigprocmask(int, const sigset_t *, sigset_t *); 1388 extern int __lwp_sigmask(int, const sigset_t *); 1389 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1390 extern caddr_t __sighndlrend; 1391 #pragma unknown_control_flow(__sighndlr) 1392 1393 /* belongs in <pthread.h> */ 1394 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1395 #define PTHREAD_CREATE_NONDAEMON_NP 0 1396 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1397 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1398 1399 extern int mutex_held(mutex_t *); 1400 extern int mutex_lock_internal(mutex_t *, timespec_t *, int); 1401 extern int mutex_unlock_internal(mutex_t *, int); 1402 1403 /* not cancellation points: */ 1404 extern int __cond_wait(cond_t *, mutex_t *); 1405 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1406 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1407 1408 extern int rw_read_held(rwlock_t *); 1409 extern int rw_write_held(rwlock_t *); 1410 1411 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1412 thread_t *, size_t); 1413 extern int _thrp_suspend(thread_t, uchar_t); 1414 extern int _thrp_continue(thread_t, uchar_t); 1415 1416 extern void _thrp_terminate(void *); 1417 extern void _thrp_exit(void); 1418 1419 extern const pcclass_t *get_info_by_class(id_t); 1420 extern const pcclass_t *get_info_by_policy(int); 1421 extern const thrattr_t *def_thrattr(void); 1422 extern id_t setparam(idtype_t, id_t, int, int); 1423 extern id_t setprio(idtype_t, id_t, int, int *); 1424 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *); 1425 1426 /* 1427 * System call wrappers (direct interfaces to the kernel) 1428 */ 1429 extern int ___lwp_mutex_register(mutex_t *, mutex_t **); 1430 extern int ___lwp_mutex_trylock(mutex_t *, ulwp_t *); 1431 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *, ulwp_t *); 1432 extern int ___lwp_mutex_unlock(mutex_t *); 1433 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1434 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1435 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1436 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1437 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1438 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1439 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1440 extern int __lwp_rwlock_unlock(rwlock_t *); 1441 extern int __lwp_park(timespec_t *, lwpid_t); 1442 extern int __lwp_unpark(lwpid_t); 1443 extern int __lwp_unpark_all(lwpid_t *, int); 1444 #if defined(__x86) 1445 extern int ___lwp_private(int, int, void *); 1446 #endif /* __x86 */ 1447 1448 /* 1449 * inlines 1450 */ 1451 extern int set_lock_byte(volatile uint8_t *); 1452 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1453 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1454 extern void atomic_inc_32(volatile uint32_t *); 1455 extern void atomic_dec_32(volatile uint32_t *); 1456 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1457 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1458 #if defined(__sparc) 1459 extern ulong_t caller(void); 1460 extern ulong_t getfp(void); 1461 #endif /* __sparc */ 1462 1463 #include "thr_inlines.h" 1464 1465 #endif /* _THR_UBERDATA_H */ 1466