1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 #ifndef _THR_UBERDATA_H 27 #define _THR_UBERDATA_H 28 29 #include <stdlib.h> 30 #include <unistd.h> 31 #include <sys/types.h> 32 #include <fcntl.h> 33 #include <string.h> 34 #include <signal.h> 35 #include <ucontext.h> 36 #include <thread.h> 37 #include <pthread.h> 38 #include <atomic.h> 39 #include <link.h> 40 #include <sys/resource.h> 41 #include <sys/lwp.h> 42 #include <errno.h> 43 #include <sys/asm_linkage.h> 44 #include <sys/regset.h> 45 #include <sys/fcntl.h> 46 #include <sys/mman.h> 47 #include <synch.h> 48 #include <door.h> 49 #include <limits.h> 50 #include <sys/synch32.h> 51 #include <schedctl.h> 52 #include <sys/priocntl.h> 53 #include <thread_db.h> 54 #include <setjmp.h> 55 #include "libc_int.h" 56 #include "tdb_agent.h" 57 #include "thr_debug.h" 58 59 /* 60 * This is an implementation-specific include file for threading support. 61 * It is not to be seen by the clients of the library. 62 * 63 * This file also describes uberdata in libc. 64 * 65 * The term "uberdata" refers to data that is unique and visible across 66 * all link maps. The name is meant to imply that such data is truly 67 * global, not just locally global to a particular link map. 68 * 69 * See the Linker and Libraries Guide for a full description of alternate 70 * link maps and how they are set up and used. 71 * 72 * Alternate link maps implement multiple global namespaces within a single 73 * process. There may be multiple instances of identical dynamic libraries 74 * loaded in a process's address space at the same time, each on a different 75 * link map (as determined by the dynamic linker), each with its own set of 76 * global variables. Which particular instance of a global variable is seen 77 * by a thread running in the process is determined by the link map on which 78 * the thread happens to be executing at the time. 79 * 80 * However, there are aspects of a process that are unique across all 81 * link maps, in particular the structures used to implement threads 82 * of control (in Sparc terminology, there is only one %g7 regardless 83 * of the link map on which the thread is executing). 84 * 85 * All uberdata is referenced from a base pointer in the thread's ulwp_t 86 * structure (which is also uberdata). All allocations and deallocations 87 * of uberdata are made via the uberdata-aware lmalloc() and lfree() 88 * interfaces (malloc() and free() are simply locally-global). 89 */ 90 91 /* 92 * Special libc-private access to errno. 93 * We do this so that references to errno do not invoke the dynamic linker. 94 */ 95 #undef errno 96 #define errno (*curthread->ul_errnop) 97 98 /* 99 * See <sys/synch32.h> for the reasons for these values 100 * and why they are different for sparc and intel. 101 */ 102 #if defined(__sparc) 103 104 /* lock.lock64.pad[x] 4 5 6 7 */ 105 #define LOCKMASK 0xff000000 106 #define WAITERMASK 0x000000ff 107 #define SPINNERMASK 0x00ff0000 108 #define SPINNERSHIFT 16 109 #define WAITER 0x00000001 110 #define LOCKSET 0xff 111 #define LOCKCLEAR 0 112 113 #define PIDSHIFT 32 114 #define LOCKMASK64 0xffffffffff000000ULL 115 #define LOCKBYTE64 0x00000000ff000000ULL 116 #define WAITERMASK64 0x00000000000000ffULL 117 #define SPINNERMASK64 0x0000000000ff0000ULL 118 119 #elif defined(__x86) 120 121 /* lock.lock64.pad[x] 7 6 5 4 */ 122 #define LOCKMASK 0xff000000 123 #define WAITERMASK 0x00ff0000 124 #define SPINNERMASK 0x0000ff00 125 #define SPINNERSHIFT 8 126 #define WAITER 0x00010000 127 #define LOCKSET 0x01 128 #define LOCKCLEAR 0 129 130 #define PIDSHIFT 0 131 #define LOCKMASK64 0xff000000ffffffffULL 132 #define LOCKBYTE64 0x0100000000000000ULL 133 #define WAITERMASK64 0x00ff000000000000ULL 134 #define SPINNERMASK64 0x0000ff0000000000ULL 135 136 #else 137 #error "neither __sparc nor __x86 is defined" 138 #endif 139 140 /* 141 * Fetch the owner of a USYNC_THREAD mutex. 142 * Don't use this with process-shared mutexes; 143 * the owing thread may be in a different process. 144 */ 145 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner) 146 147 /* 148 * Test if a thread owns a process-private (USYNC_THREAD) mutex. 149 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex. 150 * The 'mp' argument must not have side-effects since it is evaluated twice. 151 */ 152 #define MUTEX_OWNED(mp, thrp) \ 153 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp) 154 155 156 /* 157 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the 158 * collection of lock statistics by a debugger or other collecting tool. 159 * 160 * uberflags.uf_thread_error_detection is set by an environment variable: 161 * _THREAD_ERROR_DETECTION 162 * 0 == no detection of locking primitive errors. 163 * 1 == detect errors and issue a warning message. 164 * 2 == detect errors, issue a warning message, and dump core. 165 * 166 * We bundle these together in uberflags.uf_trs_ted to make a test of either 167 * being non-zero a single memory reference (for speed of mutex_lock(), etc). 168 * 169 * uberflags.uf_mt is set non-zero when the first thread (in addition 170 * to the main thread) is created. 171 * 172 * We bundle all these flags together in uberflags.uf_all to make a test 173 * of any being non-zero a single memory reference (again, for speed). 174 */ 175 typedef union { 176 int uf_all; /* combined all flags */ 177 struct { 178 short h_pad; 179 short h_trs_ted; /* combined reg sync & error detect */ 180 } uf_h; 181 struct { 182 char x_mt; 183 char x_pad; 184 char x_tdb_register_sync; 185 char x_thread_error_detection; 186 } uf_x; 187 } uberflags_t; 188 189 #define uf_mt uf_x.x_mt 190 #define uf_tdb_register_sync uf_x.x_tdb_register_sync 191 #define uf_thread_error_detection uf_x.x_thread_error_detection 192 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */ 193 194 /* 195 * NOTE WELL: 196 * To enable further optimization, the "ul_schedctl_called" member 197 * of the ulwp_t structure (below) serves double-duty: 198 * 1. If NULL, it means that the thread must call __schedctl() 199 * to set up its schedctl mappings before acquiring a mutex. 200 * This is required by the implementation of adaptive mutex locking. 201 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of 202 * uberflags can be made without additional memory references. 203 * This allows the common case of _mutex_lock() and _mutex_unlock() for 204 * USYNC_THREAD mutexes with no error detection and no lock statistics 205 * to be optimized for speed. 206 */ 207 208 /* double the default stack size for 64-bit processes */ 209 #ifdef _LP64 210 #define MINSTACK (8 * 1024) 211 #define DEFAULTSTACK (2 * 1024 * 1024) 212 #else 213 #define MINSTACK (4 * 1024) 214 #define DEFAULTSTACK (1024 * 1024) 215 #endif 216 217 #define MUTEX_TRY 0 218 #define MUTEX_LOCK 1 219 #define MUTEX_NOCEIL 0x40 220 221 #if defined(__x86) 222 223 typedef struct { /* structure returned by fnstenv */ 224 int fctrl; /* control word */ 225 int fstat; /* status word (flags, etc) */ 226 int ftag; /* tag of which regs busy */ 227 int misc[4]; /* other stuff, 28 bytes total */ 228 } fpuenv_t; 229 230 #ifdef _SYSCALL32 231 typedef fpuenv_t fpuenv32_t; 232 #endif /* _SYSCALL32 */ 233 234 #elif defined(__sparc) 235 236 typedef struct { /* fp state structure */ 237 greg_t fsr; 238 greg_t fpu_en; 239 } fpuenv_t; 240 241 #ifdef _SYSCALL32 242 typedef struct { 243 greg32_t fsr; 244 greg32_t fpu_en; 245 } fpuenv32_t; 246 #endif /* _SYSCALL32 */ 247 248 #endif /* __x86 */ 249 250 #if defined(__x86) 251 extern void ht_pause(void); /* "pause" instruction */ 252 #define SMT_PAUSE() ht_pause() 253 #elif defined(SMT_PAUSE_FUNCTION) 254 extern void SMT_PAUSE_FUNCTION(void); 255 #define SMT_PAUSE() SMT_PAUSE_FUNCTION() 256 #else 257 #define SMT_PAUSE() smt_pause() 258 #endif /* __x86 */ 259 260 /* 261 * Cleanup handler related data. 262 * This structure is exported as _cleanup_t in pthread.h. 263 * pthread.h exports only the size of this structure, so check 264 * _cleanup_t in pthread.h before making any change here. 265 */ 266 typedef struct __cleanup { 267 struct __cleanup *next; /* pointer to next handler */ 268 caddr_t fp; /* current frame pointer */ 269 void (*func)(void *); /* cleanup handler address */ 270 void *arg; /* handler's argument */ 271 } __cleanup_t; 272 273 /* 274 * Thread-Specific Data (TSD) 275 * TSD_NFAST includes the invalid key zero, so there 276 * are really only (TSD_NFAST - 1) fast key slots. 277 */ 278 typedef void (*PFrV)(void *); 279 #define TSD_UNALLOCATED ((PFrV)1) 280 #define TSD_NFAST 9 281 282 /* 283 * The tsd union is designed to burn a little memory (9 words) to make 284 * lookups blindingly fast. Note that tsd_nalloc could be placed at the 285 * end of the pad region to increase the likelihood that it falls on the 286 * same cache line as the data. 287 */ 288 typedef union tsd { 289 uint_t tsd_nalloc; /* Amount of allocated storage */ 290 void *tsd_pad[TSD_NFAST]; 291 void *tsd_data[1]; 292 } tsd_t; 293 294 typedef struct { 295 mutex_t tsdm_lock; /* Lock protecting the data */ 296 uint_t tsdm_nkeys; /* Number of allocated keys */ 297 uint_t tsdm_nused; /* Number of used keys */ 298 PFrV *tsdm_destro; /* Per-key destructors */ 299 char tsdm_pad[64 - /* pad to 64 bytes */ 300 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))]; 301 } tsd_metadata_t; 302 303 #ifdef _SYSCALL32 304 typedef union tsd32 { 305 uint_t tsd_nalloc; /* Amount of allocated storage */ 306 caddr32_t tsd_pad[TSD_NFAST]; 307 caddr32_t tsd_data[1]; 308 } tsd32_t; 309 310 typedef struct { 311 mutex_t tsdm_lock; /* Lock protecting the data */ 312 uint_t tsdm_nkeys; /* Number of allocated keys */ 313 uint_t tsdm_nused; /* Number of used keys */ 314 caddr32_t tsdm_destro; /* Per-key destructors */ 315 char tsdm_pad[64 - /* pad to 64 bytes */ 316 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))]; 317 } tsd_metadata32_t; 318 #endif /* _SYSCALL32 */ 319 320 321 /* 322 * Thread-Local Storage (TLS) 323 */ 324 typedef struct { 325 void *tls_data; 326 size_t tls_size; 327 } tls_t; 328 329 typedef struct { 330 mutex_t tls_lock; /* Lock protecting the data */ 331 tls_t tls_modinfo; /* Root of all TLS_modinfo data */ 332 tls_t static_tls; /* Template for static TLS */ 333 char tls_pad[64 - /* pad to 64 bytes */ 334 (sizeof (mutex_t) + 2 * sizeof (tls_t))]; 335 } tls_metadata_t; 336 337 #ifdef _SYSCALL32 338 typedef struct { 339 caddr32_t tls_data; 340 size32_t tls_size; 341 } tls32_t; 342 343 typedef struct { 344 mutex_t tls_lock; /* Lock protecting the data */ 345 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */ 346 tls32_t static_tls; /* Template for static TLS */ 347 char tls_pad[64 - /* pad to 64 bytes */ 348 (sizeof (mutex_t) + 2 * sizeof (tls32_t))]; 349 } tls_metadata32_t; 350 #endif /* _SYSCALL32 */ 351 352 353 /* 354 * Sleep queue root for USYNC_THREAD condvars and mutexes. 355 * There is a default queue root for each queue head (see below). 356 * Also, each ulwp_t contains a queue root that can be used 357 * when the thread is enqueued on the queue, if necessary 358 * (when more than one wchan hashes to the same queue head). 359 */ 360 typedef struct queue_root { 361 struct queue_root *qr_next; 362 struct queue_root *qr_prev; 363 struct ulwp *qr_head; 364 struct ulwp *qr_tail; 365 void *qr_wchan; 366 uint32_t qr_rtcount; 367 uint32_t qr_qlen; 368 uint32_t qr_qmax; 369 } queue_root_t; 370 371 #ifdef _SYSCALL32 372 typedef struct queue_root32 { 373 caddr32_t qr_next; 374 caddr32_t qr_prev; 375 caddr32_t qr_head; 376 caddr32_t qr_tail; 377 caddr32_t qr_wchan; 378 uint32_t qr_rtcount; 379 uint32_t qr_qlen; 380 uint32_t qr_qmax; 381 } queue_root32_t; 382 #endif 383 384 /* 385 * Sleep queue heads for USYNC_THREAD condvars and mutexes. 386 * The size and alignment is 128 bytes to reduce cache conflicts. 387 * Each queue head points to a list of queue roots, defined above. 388 * Each queue head contains a default queue root for use when only one 389 * is needed. It is always at the tail of the queue root hash chain. 390 */ 391 typedef union { 392 uint64_t qh_64[16]; 393 struct { 394 mutex_t q_lock; 395 uint8_t q_qcnt; 396 uint8_t q_type; /* MX or CV */ 397 uint8_t q_pad1[2]; 398 uint32_t q_lockcount; 399 uint32_t q_qlen; 400 uint32_t q_qmax; 401 void *q_wchan; /* valid only while locked */ 402 struct queue_root *q_root; /* valid only while locked */ 403 struct queue_root *q_hlist; 404 #if !defined(_LP64) 405 caddr_t q_pad2[3]; 406 #endif 407 queue_root_t q_def_root; 408 uint32_t q_hlen; 409 uint32_t q_hmax; 410 } qh_qh; 411 } queue_head_t; 412 413 #define qh_lock qh_qh.q_lock 414 #define qh_qcnt qh_qh.q_qcnt 415 #define qh_type qh_qh.q_type 416 #if defined(THREAD_DEBUG) 417 #define qh_lockcount qh_qh.q_lockcount 418 #define qh_qlen qh_qh.q_qlen 419 #define qh_qmax qh_qh.q_qmax 420 #endif 421 #define qh_wchan qh_qh.q_wchan 422 #define qh_root qh_qh.q_root 423 #define qh_hlist qh_qh.q_hlist 424 #define qh_def_root qh_qh.q_def_root 425 #define qh_hlen qh_qh.q_hlen 426 #define qh_hmax qh_qh.q_hmax 427 428 /* queue types passed to queue_lock() */ 429 #define MX 0 430 #define CV 1 431 #define QHASHSHIFT 9 /* number of hashing bits */ 432 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */ 433 #define QUEUE_HASH(wchan, type) ((uint_t) \ 434 ((((uintptr_t)(wchan) >> 3) \ 435 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \ 436 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE)) 437 438 extern queue_head_t *queue_lock(void *, int); 439 extern void queue_unlock(queue_head_t *); 440 extern void enqueue(queue_head_t *, struct ulwp *, int); 441 extern struct ulwp *dequeue(queue_head_t *, int *); 442 extern struct ulwp **queue_slot(queue_head_t *, struct ulwp **, int *); 443 extern struct ulwp *queue_waiter(queue_head_t *); 444 extern int dequeue_self(queue_head_t *); 445 extern void queue_unlink(queue_head_t *, 446 struct ulwp **, struct ulwp *); 447 extern void unsleep_self(void); 448 extern void spin_lock_set(mutex_t *); 449 extern void spin_lock_clear(mutex_t *); 450 451 /* 452 * Scheduling class information structure. 453 */ 454 typedef struct { 455 short pcc_state; 456 short pcc_policy; 457 pri_t pcc_primin; 458 pri_t pcc_primax; 459 pcinfo_t pcc_info; 460 } pcclass_t; 461 462 /* 463 * Memory block for chain of owned ceiling mutexes. 464 */ 465 typedef struct mxchain { 466 struct mxchain *mxchain_next; 467 mutex_t *mxchain_mx; 468 } mxchain_t; 469 470 /* 471 * Pointer to an rwlock that is held for reading. 472 * Used in rw_rdlock() to allow a thread that already holds a read 473 * lock to acquire another read lock on the same rwlock even if 474 * there are writers waiting. This to avoid deadlock when acquiring 475 * a read lock more than once in the presence of pending writers. 476 * POSIX mandates this behavior. 477 */ 478 typedef struct { 479 void *rd_rwlock; /* the rwlock held for reading */ 480 size_t rd_count; /* count of read locks applied */ 481 } readlock_t; 482 483 #ifdef _SYSCALL32 484 typedef struct { 485 caddr32_t rd_rwlock; 486 size32_t rd_count; 487 } readlock32_t; 488 #endif /* _SYSCALL32 */ 489 490 /* 491 * Maximum number of read locks allowed for one thread on one rwlock. 492 * This could be as large as INT_MAX, but the SUSV3 test suite would 493 * take an inordinately long time to complete. This is big enough. 494 */ 495 #define READ_LOCK_MAX 100000 496 497 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */ 498 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */ 499 500 /* 501 * Round up an integral value to a multiple of 64 502 */ 503 #define roundup64(x) (-(-(x) & -64)) 504 505 /* 506 * NOTE: Whatever changes are made to ulwp_t must be 507 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c 508 * 509 * NOTE: ul_self *must* be the first member of ulwp_t on x86 510 * Low-level x86 code relies on this. 511 */ 512 typedef struct ulwp { 513 /* 514 * These members always need to come first on sparc. 515 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary. 516 */ 517 #if defined(__sparc) 518 uint32_t ul_dinstr; /* scratch space for dtrace */ 519 uint32_t ul_padsparc0[15]; 520 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 521 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 522 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 523 uint32_t ul_dreturn; /* dtrace: return %o0 */ 524 #endif 525 struct ulwp *ul_self; /* pointer to self */ 526 #if defined(__i386) 527 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 528 #elif defined(__amd64) 529 uint8_t ul_dinstr[56]; /* scratch space for dtrace */ 530 #endif 531 struct uberdata *ul_uberdata; /* uber (super-global) data */ 532 tls_t ul_tls; /* dynamic thread-local storage base */ 533 struct ulwp *ul_forw; /* forw, back all_lwps list, */ 534 struct ulwp *ul_back; /* protected by link_lock */ 535 struct ulwp *ul_next; /* list to keep track of stacks */ 536 struct ulwp *ul_hash; /* hash chain linked list */ 537 void *ul_rval; /* return value from thr_exit() */ 538 caddr_t ul_stk; /* mapping base of the stack */ 539 size_t ul_mapsiz; /* mapping size of the stack */ 540 size_t ul_guardsize; /* normally _lpagesize */ 541 uintptr_t ul_stktop; /* broken thr_stksegment() interface */ 542 size_t ul_stksiz; /* broken thr_stksegment() interface */ 543 stack_t ul_ustack; /* current stack boundaries */ 544 int ul_ix; /* hash index */ 545 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 546 pri_t ul_pri; /* scheduling priority */ 547 pri_t ul_epri; /* real-time ceiling priority */ 548 char ul_policy; /* scheduling policy */ 549 char ul_cid; /* scheduling class id */ 550 union { 551 struct { 552 char cursig; /* deferred signal number */ 553 char pleasestop; /* lwp requested to stop itself */ 554 } s; 555 short curplease; /* for testing both at once */ 556 } ul_cp; 557 char ul_stop; /* reason for stopping */ 558 char ul_signalled; /* this lwp was cond_signal()d */ 559 char ul_dead; /* this lwp has called thr_exit */ 560 char ul_unwind; /* posix: unwind C++ stack */ 561 char ul_detached; /* THR_DETACHED at thread_create() */ 562 /* or pthread_detach() was called */ 563 char ul_writer; /* sleeping in rw_wrlock() */ 564 char ul_stopping; /* set by curthread: stopping self */ 565 char ul_cancel_prologue; /* for _cancel_prologue() */ 566 short ul_preempt; /* no_preempt()/preempt() */ 567 short ul_savpreempt; /* pre-existing preempt value */ 568 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 569 char ul_main; /* thread is the main thread */ 570 char ul_fork; /* thread is performing a fork */ 571 char ul_primarymap; /* primary link-map is initialized */ 572 /* per-thread copies of the corresponding global variables */ 573 uint8_t ul_max_spinners; /* thread_max_spinners */ 574 char ul_door_noreserve; /* thread_door_noreserve */ 575 char ul_queue_fifo; /* thread_queue_fifo */ 576 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 577 char ul_error_detection; /* thread_error_detection */ 578 char ul_async_safe; /* thread_async_safe */ 579 char ul_rt; /* found on an RT queue */ 580 char ul_rtqueued; /* was RT when queued */ 581 char ul_misaligned; /* thread_locks_misaligned */ 582 char ul_pad[3]; 583 int ul_adaptive_spin; /* thread_adaptive_spin */ 584 int ul_queue_spin; /* thread_queue_spin */ 585 volatile int ul_critical; /* non-zero == in a critical region */ 586 int ul_sigdefer; /* non-zero == defer signals */ 587 int ul_vfork; /* thread is the child of vfork() */ 588 int ul_cancelable; /* _cancelon()/_canceloff() */ 589 char ul_cancel_pending; /* pthread_cancel() was called */ 590 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 591 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 592 char ul_save_async; /* saved copy of ul_cancel_async */ 593 char ul_mutator; /* lwp is a mutator (java interface) */ 594 char ul_created; /* created suspended */ 595 char ul_replace; /* replacement; must be free()d */ 596 uchar_t ul_nocancel; /* cancellation can't happen */ 597 int ul_errno; /* per-thread errno */ 598 int *ul_errnop; /* pointer to errno or self->ul_errno */ 599 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */ 600 uberflags_t *ul_schedctl_called; /* ul_schedctl is set up */ 601 volatile sc_shared_t *ul_schedctl; /* schedctl data */ 602 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 603 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 604 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 605 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 606 td_evbuf_t ul_td_evbuf; /* event buffer */ 607 char ul_td_events_enable; /* event mechanism enabled */ 608 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 609 char ul_qtype; /* MX or CV */ 610 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 611 int ul_rtld; /* thread is running inside ld.so.1 */ 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 > (2 * 32) && MAXSIG <= (3 * 32)) 676 #define FILLSET0 0xffffffffu 677 #define FILLSET1 0xffffffffu 678 #define FILLSET2 ((1u << (MAXSIG - 64)) - 1) 679 #define FILLSET3 0 680 #else 681 #error "fix me: MAXSIG out of bounds" 682 #endif 683 684 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP)) 685 #define CANTMASK1 0 686 #define CANTMASK2 0 687 #define CANTMASK3 0 688 689 #define MASKSET0 (FILLSET0 & ~CANTMASK0) 690 #define MASKSET1 (FILLSET1 & ~CANTMASK1) 691 #define MASKSET2 (FILLSET2 & ~CANTMASK2) 692 #define MASKSET3 (FILLSET3 & ~CANTMASK3) 693 694 extern const sigset_t maskset; /* set of all maskable signals */ 695 696 extern int thread_adaptive_spin; 697 extern uint_t thread_max_spinners; 698 extern int thread_queue_spin; 699 extern int thread_queue_fifo; 700 extern int thread_queue_dump; 701 extern int thread_cond_wait_defer; 702 extern int thread_async_safe; 703 extern int thread_queue_verify; 704 705 /* 706 * pthread_atfork() related data, used to store atfork handlers. 707 */ 708 typedef struct atfork { 709 struct atfork *forw; /* forward pointer */ 710 struct atfork *back; /* backward pointer */ 711 void (*prepare)(void); /* pre-fork handler */ 712 void (*parent)(void); /* post-fork parent handler */ 713 void (*child)(void); /* post-fork child handler */ 714 } atfork_t; 715 716 /* 717 * Element in the table and in the list of registered process 718 * robust locks. We keep track of these to make sure that we 719 * only call ___lwp_mutex_register() once for each such lock 720 * after it is first mapped in (or newly mapped in). 721 */ 722 typedef struct robust { 723 struct robust *robust_next; /* hash table list */ 724 struct robust *robust_list; /* global list */ 725 mutex_t *robust_lock; 726 } robust_t; 727 728 /* 729 * Invalid address, used to mark an unused element in the hash table. 730 */ 731 #define INVALID_ADDR ((void *)(uintptr_t)(-1L)) 732 733 /* 734 * Parameters of the lock registration hash table. 735 */ 736 #define LOCKSHIFT 15 /* number of hashing bits */ 737 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<15 == 32K) */ 738 #define LOCK_HASH(addr) (uint_t) \ 739 ((((uintptr_t)(addr) >> 3) \ 740 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \ 741 & (LOCKHASHSZ - 1)) 742 743 /* 744 * Make our hot locks reside on private cache lines (64 bytes). 745 */ 746 typedef struct { 747 mutex_t pad_lock; 748 char pad_pad[64 - sizeof (mutex_t)]; 749 } pad_lock_t; 750 751 /* 752 * Make our semi-hot locks reside on semi-private cache lines (32 bytes). 753 */ 754 typedef struct { 755 mutex_t pad_lock; 756 char pad_pad[32 - sizeof (mutex_t)]; 757 } pad32_lock_t; 758 759 /* 760 * The threads hash table is used for fast lookup and locking of an active 761 * thread structure (ulwp_t) given a thread-id. It is an N-element array of 762 * thr_hash_table_t structures, where N == 1 before the main thread creates 763 * the first additional thread and N == 1024 afterwards. Each element of the 764 * table is 64 bytes in size and alignment to reduce cache conflicts. 765 */ 766 typedef struct { 767 mutex_t hash_lock; /* lock per bucket */ 768 cond_t hash_cond; /* convar per bucket */ 769 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */ 770 char hash_pad[64 - /* pad out to 64 bytes */ 771 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))]; 772 } thr_hash_table_t; 773 774 #ifdef _SYSCALL32 775 typedef struct { 776 mutex_t hash_lock; 777 cond_t hash_cond; 778 caddr32_t hash_bucket; 779 char hash_pad[64 - 780 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))]; 781 } thr_hash_table32_t; 782 #endif /* _SYSCALL32 */ 783 784 785 /* 786 * siguaction members have 128-byte size and 64-byte alignment. 787 * We know that sizeof (struct sigaction) is 32 bytes for both 788 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes. 789 */ 790 typedef struct { 791 rwlock_t sig_lock; 792 struct sigaction sig_uaction; 793 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)]; 794 } siguaction_t; 795 796 #ifdef _SYSCALL32 797 typedef struct { 798 rwlock_t sig_lock; 799 struct sigaction32 sig_uaction; 800 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)]; 801 } siguaction32_t; 802 #endif /* _SYSCALL32 */ 803 804 805 /* 806 * Bucket structures, used by lmalloc()/lfree(). 807 * See port/threads/alloc.c for details. 808 * A bucket's size and alignment is 64 bytes. 809 */ 810 typedef struct { 811 mutex_t bucket_lock; /* protects the free list allocations */ 812 void *free_list; /* LIFO list of blocks to allocate/free */ 813 size_t chunks; /* number of 64K blocks mmap()ed last time */ 814 char pad64[64 - /* pad out to 64 bytes */ 815 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))]; 816 } bucket_t; 817 818 #ifdef _SYSCALL32 819 typedef struct { 820 mutex_t bucket_lock; 821 caddr32_t free_list; 822 size32_t chunks; 823 char pad64[64 - /* pad out to 64 bytes */ 824 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))]; 825 } bucket32_t; 826 #endif /* _SYSCALL32 */ 827 828 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */ 829 830 831 /* 832 * atexit() data structures. 833 * See port/gen/atexit.c for details. 834 */ 835 typedef void (*_exithdlr_func_t) (void); 836 837 typedef struct _exthdlr { 838 struct _exthdlr *next; /* next in handler list */ 839 _exithdlr_func_t hdlr; /* handler itself */ 840 } _exthdlr_t; 841 842 typedef struct { 843 mutex_t exitfns_lock; 844 _exthdlr_t *head; 845 void *exit_frame_monitor; 846 char exit_pad[64 - /* pad out to 64 bytes */ 847 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))]; 848 } atexit_root_t; 849 850 #ifdef _SYSCALL32 851 typedef struct { 852 mutex_t exitfns_lock; 853 caddr32_t head; 854 caddr32_t exit_frame_monitor; 855 char exit_pad[64 - /* pad out to 64 bytes */ 856 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))]; 857 } atexit_root32_t; 858 #endif /* _SYSCALL32 */ 859 860 861 /* 862 * This is data that is global to all link maps (uberdata, aka super-global). 863 */ 864 typedef struct uberdata { 865 pad_lock_t _link_lock; 866 pad_lock_t _ld_lock; 867 pad_lock_t _fork_lock; 868 pad_lock_t _atfork_lock; 869 pad32_lock_t _callout_lock; 870 pad32_lock_t _tdb_hash_lock; 871 tdb_sync_stats_t tdb_hash_lock_stats; 872 siguaction_t siguaction[NSIG]; 873 bucket_t bucket[NBUCKETS]; 874 atexit_root_t atexit_root; 875 tsd_metadata_t tsd_metadata; 876 tls_metadata_t tls_metadata; 877 /* 878 * Every object before this point has size and alignment of 64 bytes. 879 * Don't add any other type of data before this point. 880 */ 881 char primary_map; /* set when primary link map is initialized */ 882 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 883 char pad[2]; 884 uberflags_t uberflags; 885 queue_head_t *queue_head; 886 thr_hash_table_t *thr_hash_table; 887 uint_t hash_size; /* # of entries in thr_hash_table[] */ 888 uint_t hash_mask; /* hash_size - 1 */ 889 ulwp_t *ulwp_one; /* main thread */ 890 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 891 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 892 int nthreads; /* total number of live threads/lwps */ 893 int nzombies; /* total number of zombie threads */ 894 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 895 pid_t pid; /* the current process's pid */ 896 void (*sigacthandler)(int, siginfo_t *, void *); 897 ulwp_t *lwp_stacks; 898 ulwp_t *lwp_laststack; 899 int nfreestack; 900 int thread_stack_cache; 901 ulwp_t *ulwp_freelist; 902 ulwp_t *ulwp_lastfree; 903 ulwp_t *ulwp_replace_free; 904 ulwp_t *ulwp_replace_last; 905 atfork_t *atforklist; /* circular Q for fork handlers */ 906 robust_t **robustlocks; /* table of registered robust locks */ 907 robust_t *robustlist; /* list of registered robust locks */ 908 char *progname; /* the basename of the program, from argv[0] */ 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 init_progname(void); 1353 extern void _cancelon(void); 1354 extern void _canceloff(void); 1355 extern void _canceloff_nocancel(void); 1356 extern void _cancel_prologue(void); 1357 extern void _cancel_epilogue(void); 1358 extern void no_preempt(ulwp_t *); 1359 extern void preempt(ulwp_t *); 1360 extern void _thrp_unwind(void *); 1361 1362 extern pid_t __forkx(int); 1363 extern pid_t __forkallx(int); 1364 extern int __open(const char *, int, mode_t); 1365 extern int __open64(const char *, int, mode_t); 1366 extern int __openat(int, const char *, int, mode_t); 1367 extern int __openat64(int, const char *, int, mode_t); 1368 extern int __close(int); 1369 extern ssize_t __read(int, void *, size_t); 1370 extern ssize_t __write(int, const void *, size_t); 1371 extern int __fcntl(int, int, ...); 1372 extern int __lwp_continue(lwpid_t); 1373 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1374 extern int ___lwp_suspend(lwpid_t); 1375 extern int lwp_wait(lwpid_t, lwpid_t *); 1376 extern int __lwp_wait(lwpid_t, lwpid_t *); 1377 extern int __lwp_detach(lwpid_t); 1378 extern sc_shared_t *__schedctl(void); 1379 1380 /* actual system call traps */ 1381 extern int __setcontext(const ucontext_t *); 1382 extern int __getcontext(ucontext_t *); 1383 extern int __clock_gettime(clockid_t, timespec_t *); 1384 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1385 extern void hrt2ts(hrtime_t, timespec_t *); 1386 1387 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1388 extern int __sigprocmask(int, const sigset_t *, sigset_t *); 1389 extern int __lwp_sigmask(int, const sigset_t *); 1390 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1391 extern caddr_t __sighndlrend; 1392 #pragma unknown_control_flow(__sighndlr) 1393 1394 /* belongs in <pthread.h> */ 1395 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1396 #define PTHREAD_CREATE_NONDAEMON_NP 0 1397 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1398 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1399 1400 extern int mutex_held(mutex_t *); 1401 extern int mutex_lock_internal(mutex_t *, timespec_t *, int); 1402 extern int mutex_unlock_internal(mutex_t *, int); 1403 1404 /* not cancellation points: */ 1405 extern int __cond_wait(cond_t *, mutex_t *); 1406 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1407 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1408 1409 extern int rw_read_held(rwlock_t *); 1410 extern int rw_write_held(rwlock_t *); 1411 1412 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1413 thread_t *, size_t); 1414 extern int _thrp_suspend(thread_t, uchar_t); 1415 extern int _thrp_continue(thread_t, uchar_t); 1416 1417 extern void _thrp_terminate(void *); 1418 extern void _thrp_exit(void); 1419 1420 extern const pcclass_t *get_info_by_class(id_t); 1421 extern const pcclass_t *get_info_by_policy(int); 1422 extern const thrattr_t *def_thrattr(void); 1423 extern id_t setparam(idtype_t, id_t, int, int); 1424 extern id_t setprio(idtype_t, id_t, int, int *); 1425 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *); 1426 1427 /* 1428 * System call wrappers (direct interfaces to the kernel) 1429 */ 1430 extern int ___lwp_mutex_register(mutex_t *, mutex_t **); 1431 extern int ___lwp_mutex_trylock(mutex_t *, ulwp_t *); 1432 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *, ulwp_t *); 1433 extern int ___lwp_mutex_unlock(mutex_t *); 1434 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1435 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1436 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1437 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1438 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1439 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1440 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1441 extern int __lwp_rwlock_unlock(rwlock_t *); 1442 extern int __lwp_park(timespec_t *, lwpid_t); 1443 extern int __lwp_unpark(lwpid_t); 1444 extern int __lwp_unpark_all(lwpid_t *, int); 1445 #if defined(__x86) 1446 extern int ___lwp_private(int, int, void *); 1447 #endif /* __x86 */ 1448 1449 /* 1450 * inlines 1451 */ 1452 extern int set_lock_byte(volatile uint8_t *); 1453 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1454 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1455 extern void atomic_inc_32(volatile uint32_t *); 1456 extern void atomic_dec_32(volatile uint32_t *); 1457 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1458 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1459 #if defined(__sparc) 1460 extern ulong_t caller(void); 1461 extern ulong_t getfp(void); 1462 #endif /* __sparc */ 1463 1464 #include "thr_inlines.h" 1465 1466 #endif /* _THR_UBERDATA_H */ 1467