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 * Note: When changing this, please be sure to keep the 32-bit variant of 864 * this in sync. (see uberdata32_t below) 865 */ 866 typedef struct uberdata { 867 pad_lock_t _link_lock; 868 pad_lock_t _ld_lock; 869 pad_lock_t _fork_lock; 870 pad_lock_t _atfork_lock; 871 pad32_lock_t _callout_lock; 872 pad32_lock_t _tdb_hash_lock; 873 tdb_sync_stats_t tdb_hash_lock_stats; 874 siguaction_t siguaction[NSIG]; 875 bucket_t bucket[NBUCKETS]; 876 atexit_root_t atexit_root; 877 tsd_metadata_t tsd_metadata; 878 tls_metadata_t tls_metadata; 879 /* 880 * Every object before this point has size and alignment of 64 bytes. 881 * Don't add any other type of data before this point. 882 */ 883 char primary_map; /* set when primary link map is initialized */ 884 char bucket_init; /* set when bucket[NBUCKETS] is initialized */ 885 char pad[2]; 886 uberflags_t uberflags; 887 queue_head_t *queue_head; 888 thr_hash_table_t *thr_hash_table; 889 uint_t hash_size; /* # of entries in thr_hash_table[] */ 890 uint_t hash_mask; /* hash_size - 1 */ 891 ulwp_t *ulwp_one; /* main thread */ 892 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */ 893 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */ 894 int nthreads; /* total number of live threads/lwps */ 895 int nzombies; /* total number of zombie threads */ 896 int ndaemons; /* total number of THR_DAEMON threads/lwps */ 897 pid_t pid; /* the current process's pid */ 898 void (*sigacthandler)(int, siginfo_t *, void *); 899 ulwp_t *lwp_stacks; 900 ulwp_t *lwp_laststack; 901 int nfreestack; 902 int thread_stack_cache; 903 ulwp_t *ulwp_freelist; 904 ulwp_t *ulwp_lastfree; 905 ulwp_t *ulwp_replace_free; 906 ulwp_t *ulwp_replace_last; 907 atfork_t *atforklist; /* circular Q for fork handlers */ 908 robust_t **robustlocks; /* table of registered robust locks */ 909 robust_t *robustlist; /* list of registered robust locks */ 910 char *progname; /* the basename of the program, from argv[0] */ 911 struct uberdata **tdb_bootstrap; 912 tdb_t tdb; /* thread debug interfaces (for libc_db) */ 913 } uberdata_t; 914 915 #define link_lock _link_lock.pad_lock 916 #define ld_lock _ld_lock.pad_lock 917 #define fork_lock _fork_lock.pad_lock 918 #define atfork_lock _atfork_lock.pad_lock 919 #define callout_lock _callout_lock.pad_lock 920 #define tdb_hash_lock _tdb_hash_lock.pad_lock 921 922 #pragma align 64(__uberdata) 923 extern uberdata_t __uberdata; 924 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */ 925 extern int primary_link_map; 926 927 #define ulwp_mutex(ulwp, udp) \ 928 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock) 929 #define ulwp_condvar(ulwp, udp) \ 930 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond) 931 932 /* 933 * Grab and release the hash table lock for the specified lwp. 934 */ 935 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp)) 936 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp)) 937 938 #ifdef _SYSCALL32 /* needed by libc_db */ 939 940 typedef struct ulwp32 { 941 #if defined(__sparc) 942 uint32_t ul_dinstr; /* scratch space for dtrace */ 943 uint32_t ul_padsparc0[15]; 944 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */ 945 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */ 946 uint32_t ul_dftret; /* dtrace: return probe fasttrap */ 947 uint32_t ul_dreturn; /* dtrace: return %o0 */ 948 #endif 949 caddr32_t ul_self; /* pointer to self */ 950 #if defined(__x86) 951 uint8_t ul_dinstr[40]; /* scratch space for dtrace */ 952 #endif 953 caddr32_t ul_uberdata; /* uber (super-global) data */ 954 tls32_t ul_tls; /* dynamic thread-local storage base */ 955 caddr32_t ul_forw; /* forw, back all_lwps list, */ 956 caddr32_t ul_back; /* protected by link_lock */ 957 caddr32_t ul_next; /* list to keep track of stacks */ 958 caddr32_t ul_hash; /* hash chain linked list */ 959 caddr32_t ul_rval; /* return value from thr_exit() */ 960 caddr32_t ul_stk; /* mapping base of the stack */ 961 size32_t ul_mapsiz; /* mapping size of the stack */ 962 size32_t ul_guardsize; /* normally _lpagesize */ 963 caddr32_t ul_stktop; /* broken thr_stksegment() interface */ 964 size32_t ul_stksiz; /* broken thr_stksegment() interface */ 965 stack32_t ul_ustack; /* current stack boundaries */ 966 int ul_ix; /* hash index */ 967 lwpid_t ul_lwpid; /* thread id, aka the lwp id */ 968 pri_t ul_pri; /* scheduling priority */ 969 pri_t ul_epri; /* real-time ceiling priority */ 970 char ul_policy; /* scheduling policy */ 971 char ul_cid; /* scheduling class id */ 972 union { 973 struct { 974 char cursig; /* deferred signal number */ 975 char pleasestop; /* lwp requested to stop itself */ 976 } s; 977 short curplease; /* for testing both at once */ 978 } ul_cp; 979 char ul_stop; /* reason for stopping */ 980 char ul_signalled; /* this lwp was cond_signal()d */ 981 char ul_dead; /* this lwp has called thr_exit */ 982 char ul_unwind; /* posix: unwind C++ stack */ 983 char ul_detached; /* THR_DETACHED at thread_create() */ 984 /* or pthread_detach() was called */ 985 char ul_writer; /* sleeping in rw_wrlock() */ 986 char ul_stopping; /* set by curthread: stopping self */ 987 char ul_cancel_prologue; /* for _cancel_prologue() */ 988 short ul_preempt; /* no_preempt()/preempt() */ 989 short ul_savpreempt; /* pre-existing preempt value */ 990 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */ 991 char ul_main; /* thread is the main thread */ 992 char ul_fork; /* thread is performing a fork */ 993 char ul_primarymap; /* primary link-map is initialized */ 994 /* per-thread copies of the corresponding global variables */ 995 uint8_t ul_max_spinners; /* thread_max_spinners */ 996 char ul_door_noreserve; /* thread_door_noreserve */ 997 char ul_queue_fifo; /* thread_queue_fifo */ 998 char ul_cond_wait_defer; /* thread_cond_wait_defer */ 999 char ul_error_detection; /* thread_error_detection */ 1000 char ul_async_safe; /* thread_async_safe */ 1001 char ul_rt; /* found on an RT queue */ 1002 char ul_rtqueued; /* was RT when queued */ 1003 char ul_misaligned; /* thread_locks_misaligned */ 1004 char ul_pad[3]; 1005 int ul_adaptive_spin; /* thread_adaptive_spin */ 1006 int ul_queue_spin; /* thread_queue_spin */ 1007 int ul_critical; /* non-zero == in a critical region */ 1008 int ul_sigdefer; /* non-zero == defer signals */ 1009 int ul_vfork; /* thread is the child of vfork() */ 1010 int ul_cancelable; /* _cancelon()/_canceloff() */ 1011 char ul_cancel_pending; /* pthread_cancel() was called */ 1012 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */ 1013 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */ 1014 char ul_save_async; /* saved copy of ul_cancel_async */ 1015 char ul_mutator; /* lwp is a mutator (java interface) */ 1016 char ul_created; /* created suspended */ 1017 char ul_replace; /* replacement; must be free()d */ 1018 uchar_t ul_nocancel; /* cancellation can't happen */ 1019 int ul_errno; /* per-thread errno */ 1020 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */ 1021 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */ 1022 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */ 1023 caddr32_t ul_schedctl; /* schedctl data */ 1024 int ul_bindflags; /* bind_guard() interface to ld.so.1 */ 1025 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */ 1026 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */ 1027 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */ 1028 td_evbuf32_t ul_td_evbuf; /* event buffer */ 1029 char ul_td_events_enable; /* event mechanism enabled */ 1030 char ul_sync_obj_reg; /* tdb_sync_obj_register() */ 1031 char ul_qtype; /* MX or CV */ 1032 char ul_cv_wake; /* != 0: just wake up, don't requeue */ 1033 int ul_rtld; /* thread is running inside ld.so.1 */ 1034 int ul_usropts; /* flags given to thr_create() */ 1035 caddr32_t ul_startpc; /* start func (thr_create()) */ 1036 caddr32_t ul_startarg; /* argument for start function */ 1037 caddr32_t ul_wchan; /* synch object when sleeping */ 1038 caddr32_t ul_link; /* sleep queue link */ 1039 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */ 1040 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */ 1041 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */ 1042 int ul_save_state; /* bind_guard() interface to ld.so.1 */ 1043 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */ 1044 /* 0 means there is but a single entry */ 1045 union { /* single entry or pointer to array */ 1046 readlock32_t single; 1047 caddr32_t array; 1048 } ul_readlock; 1049 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */ 1050 /* 0 means there is but a single entry */ 1051 union { /* single entry or pointer to array */ 1052 caddr32_t single; 1053 caddr32_t array; 1054 } ul_heldlocks; 1055 /* PROBE_SUPPORT begin */ 1056 caddr32_t ul_tpdp; 1057 /* PROBE_SUPPORT end */ 1058 caddr32_t ul_siglink; /* pointer to previous context */ 1059 uint_t ul_spin_lock_spin; /* spin lock statistics */ 1060 uint_t ul_spin_lock_spin2; 1061 uint_t ul_spin_lock_sleep; 1062 uint_t ul_spin_lock_wakeup; 1063 queue_root32_t ul_queue_root; /* root of a sleep queue */ 1064 id_t ul_rtclassid; /* real-time class id */ 1065 uint_t ul_pilocks; /* count of PI locks held */ 1066 /* the following members *must* be last in the structure */ 1067 /* they are discarded when ulwp is replaced on thr_exit() */ 1068 sigset_t ul_sigmask; /* thread's current signal mask */ 1069 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */ 1070 siginfo32_t ul_siginfo; /* deferred siginfo */ 1071 mutex_t ul_spinlock; /* used when suspending/continuing */ 1072 fpuenv32_t ul_fpuenv; /* floating point state */ 1073 caddr32_t ul_sp; /* stack pointer when blocked */ 1074 #if defined(sparc) 1075 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */ 1076 #endif 1077 } ulwp32_t; 1078 1079 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask) 1080 1081 typedef struct uberdata32 { 1082 pad_lock_t _link_lock; 1083 pad_lock_t _ld_lock; 1084 pad_lock_t _fork_lock; 1085 pad_lock_t _atfork_lock; 1086 pad32_lock_t _callout_lock; 1087 pad32_lock_t _tdb_hash_lock; 1088 tdb_sync_stats_t tdb_hash_lock_stats; 1089 siguaction32_t siguaction[NSIG]; 1090 bucket32_t bucket[NBUCKETS]; 1091 atexit_root32_t atexit_root; 1092 tsd_metadata32_t tsd_metadata; 1093 tls_metadata32_t tls_metadata; 1094 char primary_map; 1095 char bucket_init; 1096 char pad[2]; 1097 uberflags_t uberflags; 1098 caddr32_t queue_head; 1099 caddr32_t thr_hash_table; 1100 uint_t hash_size; 1101 uint_t hash_mask; 1102 caddr32_t ulwp_one; 1103 caddr32_t all_lwps; 1104 caddr32_t all_zombies; 1105 int nthreads; 1106 int nzombies; 1107 int ndaemons; 1108 int pid; 1109 caddr32_t sigacthandler; 1110 caddr32_t lwp_stacks; 1111 caddr32_t lwp_laststack; 1112 int nfreestack; 1113 int thread_stack_cache; 1114 caddr32_t ulwp_freelist; 1115 caddr32_t ulwp_lastfree; 1116 caddr32_t ulwp_replace_free; 1117 caddr32_t ulwp_replace_last; 1118 caddr32_t atforklist; 1119 caddr32_t robustlocks; 1120 caddr32_t robustlist; 1121 caddr32_t progname; 1122 caddr32_t tdb_bootstrap; 1123 tdb32_t tdb; 1124 } uberdata32_t; 1125 1126 #endif /* _SYSCALL32 */ 1127 1128 /* ul_stop values */ 1129 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */ 1130 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */ 1131 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */ 1132 1133 /* 1134 * Implementation-specific attribute types for pthread_mutexattr_init() etc. 1135 */ 1136 1137 typedef struct _cvattr { 1138 int pshared; 1139 clockid_t clockid; 1140 } cvattr_t; 1141 1142 typedef struct _mattr { 1143 int pshared; 1144 int protocol; 1145 int prioceiling; 1146 int type; 1147 int robustness; 1148 } mattr_t; 1149 1150 typedef struct _thrattr { 1151 size_t stksize; 1152 void *stkaddr; 1153 int detachstate; 1154 int daemonstate; 1155 int scope; 1156 int prio; 1157 int policy; 1158 int inherit; 1159 size_t guardsize; 1160 } thrattr_t; 1161 1162 typedef struct _rwlattr { 1163 int pshared; 1164 } rwlattr_t; 1165 1166 /* _curthread() is inline for speed */ 1167 extern ulwp_t *_curthread(void); 1168 #define curthread (_curthread()) 1169 1170 /* this version (also inline) can be tested for NULL */ 1171 extern ulwp_t *__curthread(void); 1172 1173 /* get the current stack pointer (also inline) */ 1174 extern greg_t stkptr(void); 1175 1176 /* 1177 * Suppress __attribute__((...)) if we are not compiling with gcc 1178 */ 1179 #if !defined(__GNUC__) 1180 #define __attribute__(string) 1181 #endif 1182 1183 /* Fetch the dispatch (kernel) priority of a thread */ 1184 #define real_priority(ulwp) \ 1185 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0) 1186 1187 /* 1188 * Implementation functions. Not visible outside of the library itself. 1189 */ 1190 extern int __nanosleep(const timespec_t *, timespec_t *); 1191 extern void getgregs(ulwp_t *, gregset_t); 1192 extern void setgregs(ulwp_t *, gregset_t); 1193 extern void thr_panic(const char *); 1194 #pragma rarely_called(thr_panic) 1195 extern ulwp_t *find_lwp(thread_t); 1196 extern void finish_init(void); 1197 extern void update_sched(ulwp_t *); 1198 extern void queue_alloc(void); 1199 extern void tsd_exit(void); 1200 extern void tsd_free(ulwp_t *); 1201 extern void tls_setup(void); 1202 extern void tls_exit(void); 1203 extern void tls_free(ulwp_t *); 1204 extern void rwl_free(ulwp_t *); 1205 extern void heldlock_exit(void); 1206 extern void heldlock_free(ulwp_t *); 1207 extern void sigacthandler(int, siginfo_t *, void *); 1208 extern void signal_init(void); 1209 extern int sigequalset(const sigset_t *, const sigset_t *); 1210 extern void mutex_setup(void); 1211 extern void take_deferred_signal(int); 1212 extern void *setup_top_frame(void *, size_t, ulwp_t *); 1213 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *), 1214 ulwp_t *ulwp, caddr_t stk, size_t stksize); 1215 extern volatile sc_shared_t *setup_schedctl(void); 1216 extern void *lmalloc(size_t); 1217 extern void lfree(void *, size_t); 1218 extern void *libc_malloc(size_t); 1219 extern void *libc_realloc(void *, size_t); 1220 extern void libc_free(void *); 1221 extern char *libc_strdup(const char *); 1222 extern void ultos(uint64_t, int, char *); 1223 extern void lock_error(const mutex_t *, const char *, void *, const char *); 1224 extern void rwlock_error(const rwlock_t *, const char *, const char *); 1225 extern void thread_error(const char *); 1226 extern void grab_assert_lock(void); 1227 extern void dump_queue_statistics(void); 1228 extern void collect_queue_statistics(void); 1229 extern void record_spin_locks(ulwp_t *); 1230 extern void remember_lock(mutex_t *); 1231 extern void forget_lock(mutex_t *); 1232 extern void register_lock(mutex_t *); 1233 extern void unregister_locks(void); 1234 #if defined(__sparc) 1235 extern void _flush_windows(void); 1236 #else 1237 #define _flush_windows() 1238 #endif 1239 extern void set_curthread(void *); 1240 1241 /* 1242 * Utility function used when waking up many threads (more than MAXLWPS) 1243 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock(). 1244 */ 1245 #define MAXLWPS 128 /* max remembered lwpids before overflow */ 1246 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */ 1247 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *); 1248 1249 /* enter a critical section */ 1250 #define enter_critical(self) (self->ul_critical++) 1251 1252 /* exit a critical section, take deferred actions if necessary */ 1253 extern void do_exit_critical(void); 1254 #define exit_critical(self) \ 1255 (void) (self->ul_critical--, \ 1256 ((self->ul_curplease && self->ul_critical == 0)? \ 1257 (do_exit_critical(), 0) : 0)) 1258 1259 /* 1260 * Like enter_critical()/exit_critical() but just for deferring signals. 1261 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while 1262 * calling application functions like constructors and destructors. 1263 * Care must be taken if the application function attempts to set 1264 * the signal mask while a deferred signal is present; the setting 1265 * of the signal mask must also be deferred. 1266 */ 1267 #define sigoff(self) (self->ul_sigdefer++) 1268 #define sigon(self) \ 1269 (void) ((--self->ul_sigdefer == 0 && \ 1270 self->ul_curplease && self->ul_critical == 0)? \ 1271 (do_exit_critical(), 0) : 0) 1272 1273 /* these are exported functions */ 1274 extern void _sigoff(void); 1275 extern void _sigon(void); 1276 1277 #define sigorset(s1, s2) \ 1278 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \ 1279 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \ 1280 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \ 1281 ((s1)->__sigbits[3] |= (s2)->__sigbits[3])) 1282 1283 #define sigandset(s1, s2) \ 1284 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \ 1285 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \ 1286 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \ 1287 ((s1)->__sigbits[3] &= (s2)->__sigbits[3])) 1288 1289 #define sigdiffset(s1, s2) \ 1290 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \ 1291 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \ 1292 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \ 1293 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3])) 1294 1295 #define delete_reserved_signals(s) \ 1296 (((s)->__sigbits[0] &= MASKSET0), \ 1297 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\ 1298 ((s)->__sigbits[2] &= MASKSET2), \ 1299 ((s)->__sigbits[3] &= MASKSET3)) 1300 1301 extern void block_all_signals(ulwp_t *self); 1302 1303 /* 1304 * When restoring the signal mask after having previously called 1305 * block_all_signals(), if we have a deferred signal present then 1306 * do nothing other than ASSERT() that we are in a critical region. 1307 * The signal mask will be set when we emerge from the critical region 1308 * and call take_deferred_signal(). There is no race condition here 1309 * because the kernel currently has all signals blocked for this thread. 1310 */ 1311 #define restore_signals(self) \ 1312 ((void) ((self)->ul_cursig? \ 1313 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \ 1314 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask))) 1315 1316 extern void set_cancel_pending_flag(ulwp_t *, int); 1317 extern void set_cancel_eintr_flag(ulwp_t *); 1318 extern void set_parking_flag(ulwp_t *, int); 1319 extern int cancel_active(void); 1320 1321 extern void *_thrp_setup(ulwp_t *); 1322 extern void _fpinherit(ulwp_t *); 1323 extern void _lwp_start(void); 1324 extern void _lwp_terminate(void); 1325 extern void lmutex_lock(mutex_t *); 1326 extern void lmutex_unlock(mutex_t *); 1327 extern void lrw_rdlock(rwlock_t *); 1328 extern void lrw_wrlock(rwlock_t *); 1329 extern void lrw_unlock(rwlock_t *); 1330 extern void sig_mutex_lock(mutex_t *); 1331 extern void sig_mutex_unlock(mutex_t *); 1332 extern int sig_mutex_trylock(mutex_t *); 1333 extern int sig_cond_wait(cond_t *, mutex_t *); 1334 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1335 extern void cancel_safe_mutex_lock(mutex_t *); 1336 extern void cancel_safe_mutex_unlock(mutex_t *); 1337 extern int cancel_safe_mutex_trylock(mutex_t *); 1338 extern void _prefork_handler(void); 1339 extern void _postfork_parent_handler(void); 1340 extern void _postfork_child_handler(void); 1341 extern void postfork1_child(void); 1342 extern void postfork1_child_aio(void); 1343 extern void postfork1_child_sigev_aio(void); 1344 extern void postfork1_child_sigev_mq(void); 1345 extern void postfork1_child_sigev_timer(void); 1346 extern void postfork1_child_tpool(void); 1347 extern void fork_lock_enter(void); 1348 extern void fork_lock_exit(void); 1349 extern void suspend_fork(void); 1350 extern void continue_fork(int); 1351 extern void do_sigcancel(void); 1352 extern void setup_cancelsig(int); 1353 extern void init_sigev_thread(void); 1354 extern void init_aio(void); 1355 extern void init_progname(void); 1356 extern void _cancelon(void); 1357 extern void _canceloff(void); 1358 extern void _canceloff_nocancel(void); 1359 extern void _cancel_prologue(void); 1360 extern void _cancel_epilogue(void); 1361 extern void no_preempt(ulwp_t *); 1362 extern void preempt(ulwp_t *); 1363 extern void _thrp_unwind(void *); 1364 1365 extern pid_t __forkx(int); 1366 extern pid_t __forkallx(int); 1367 extern int __open(const char *, int, mode_t); 1368 extern int __open64(const char *, int, mode_t); 1369 extern int __openat(int, const char *, int, mode_t); 1370 extern int __openat64(int, const char *, int, mode_t); 1371 extern int __close(int); 1372 extern ssize_t __read(int, void *, size_t); 1373 extern ssize_t __write(int, const void *, size_t); 1374 extern int __fcntl(int, int, ...); 1375 extern int __lwp_continue(lwpid_t); 1376 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *); 1377 extern int ___lwp_suspend(lwpid_t); 1378 extern int lwp_wait(lwpid_t, lwpid_t *); 1379 extern int __lwp_wait(lwpid_t, lwpid_t *); 1380 extern int __lwp_detach(lwpid_t); 1381 extern sc_shared_t *__schedctl(void); 1382 1383 /* actual system call traps */ 1384 extern int __setcontext(const ucontext_t *); 1385 extern int __getcontext(ucontext_t *); 1386 extern int __clock_gettime(clockid_t, timespec_t *); 1387 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *); 1388 extern void hrt2ts(hrtime_t, timespec_t *); 1389 1390 extern int __sigaction(int, const struct sigaction *, struct sigaction *); 1391 extern int __sigprocmask(int, const sigset_t *, sigset_t *); 1392 extern int __lwp_sigmask(int, const sigset_t *); 1393 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)()); 1394 extern caddr_t __sighndlrend; 1395 #pragma unknown_control_flow(__sighndlr) 1396 1397 /* belongs in <pthread.h> */ 1398 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */ 1399 #define PTHREAD_CREATE_NONDAEMON_NP 0 1400 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int); 1401 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *); 1402 1403 extern int mutex_held(mutex_t *); 1404 extern int mutex_lock_internal(mutex_t *, timespec_t *, int); 1405 extern int mutex_unlock_internal(mutex_t *, int); 1406 1407 /* not cancellation points: */ 1408 extern int __cond_wait(cond_t *, mutex_t *); 1409 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *); 1410 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *); 1411 1412 extern int rw_read_held(rwlock_t *); 1413 extern int rw_write_held(rwlock_t *); 1414 1415 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long, 1416 thread_t *, size_t); 1417 extern int _thrp_suspend(thread_t, uchar_t); 1418 extern int _thrp_continue(thread_t, uchar_t); 1419 1420 extern void _thrp_terminate(void *); 1421 extern void _thrp_exit(void); 1422 1423 extern const pcclass_t *get_info_by_class(id_t); 1424 extern const pcclass_t *get_info_by_policy(int); 1425 extern const thrattr_t *def_thrattr(void); 1426 extern id_t setparam(idtype_t, id_t, int, int); 1427 extern id_t setprio(idtype_t, id_t, int, int *); 1428 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *); 1429 1430 /* 1431 * System call wrappers (direct interfaces to the kernel) 1432 */ 1433 extern int ___lwp_mutex_register(mutex_t *, mutex_t **); 1434 extern int ___lwp_mutex_trylock(mutex_t *, ulwp_t *); 1435 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *, ulwp_t *); 1436 extern int ___lwp_mutex_unlock(mutex_t *); 1437 extern int ___lwp_mutex_wakeup(mutex_t *, int); 1438 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int); 1439 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int); 1440 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *); 1441 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *); 1442 extern int __lwp_rwlock_tryrdlock(rwlock_t *); 1443 extern int __lwp_rwlock_trywrlock(rwlock_t *); 1444 extern int __lwp_rwlock_unlock(rwlock_t *); 1445 extern int __lwp_park(timespec_t *, lwpid_t); 1446 extern int __lwp_unpark(lwpid_t); 1447 extern int __lwp_unpark_all(lwpid_t *, int); 1448 #if defined(__x86) 1449 extern int ___lwp_private(int, int, void *); 1450 #endif /* __x86 */ 1451 1452 /* 1453 * inlines 1454 */ 1455 extern int set_lock_byte(volatile uint8_t *); 1456 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); 1457 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); 1458 extern void atomic_inc_32(volatile uint32_t *); 1459 extern void atomic_dec_32(volatile uint32_t *); 1460 extern void atomic_and_32(volatile uint32_t *, uint32_t); 1461 extern void atomic_or_32(volatile uint32_t *, uint32_t); 1462 #if defined(__sparc) 1463 extern ulong_t caller(void); 1464 extern ulong_t getfp(void); 1465 #endif /* __sparc */ 1466 1467 #include "thr_inlines.h" 1468 1469 #endif /* _THR_UBERDATA_H */ 1470