1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25 /*
26 * Copyright 2016 Joyent, Inc.
27 */
28
29 #ifndef _THR_UBERDATA_H
30 #define _THR_UBERDATA_H
31
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <sys/types.h>
35 #include <fcntl.h>
36 #include <string.h>
37 #include <signal.h>
38 #include <ucontext.h>
39 #include <thread.h>
40 #include <pthread.h>
41 #include <atomic.h>
42 #include <link.h>
43 #include <sys/resource.h>
44 #include <sys/lwp.h>
45 #include <errno.h>
46 #include <sys/asm_linkage.h>
47 #include <sys/regset.h>
48 #include <sys/fcntl.h>
49 #include <sys/mman.h>
50 #include <synch.h>
51 #include <door.h>
52 #include <limits.h>
53 #include <sys/synch32.h>
54 #include <schedctl.h>
55 #include <sys/priocntl.h>
56 #include <thread_db.h>
57 #include <setjmp.h>
58 #include "libc_int.h"
59 #include "tdb_agent.h"
60 #include "thr_debug.h"
61
62 /*
63 * This is an implementation-specific include file for threading support.
64 * It is not to be seen by the clients of the library.
65 *
66 * This file also describes uberdata in libc.
67 *
68 * The term "uberdata" refers to data that is unique and visible across
69 * all link maps. The name is meant to imply that such data is truly
70 * global, not just locally global to a particular link map.
71 *
72 * See the Linker and Libraries Guide for a full description of alternate
73 * link maps and how they are set up and used.
74 *
75 * Alternate link maps implement multiple global namespaces within a single
76 * process. There may be multiple instances of identical dynamic libraries
77 * loaded in a process's address space at the same time, each on a different
78 * link map (as determined by the dynamic linker), each with its own set of
79 * global variables. Which particular instance of a global variable is seen
80 * by a thread running in the process is determined by the link map on which
81 * the thread happens to be executing at the time.
82 *
83 * However, there are aspects of a process that are unique across all
84 * link maps, in particular the structures used to implement threads
85 * of control (in Sparc terminology, there is only one %g7 regardless
86 * of the link map on which the thread is executing).
87 *
88 * All uberdata is referenced from a base pointer in the thread's ulwp_t
89 * structure (which is also uberdata). All allocations and deallocations
90 * of uberdata are made via the uberdata-aware lmalloc() and lfree()
91 * interfaces (malloc() and free() are simply locally-global).
92 */
93
94 /*
95 * Special libc-private access to errno.
96 * We do this so that references to errno do not invoke the dynamic linker.
97 */
98 #undef errno
99 #define errno (*curthread->ul_errnop)
100
101 /*
102 * See <sys/synch32.h> for the reasons for these values
103 * and why they are different for sparc and intel.
104 */
105 #if defined(__sparc)
106
107 /* lock.lock64.pad[x] 4 5 6 7 */
108 #define LOCKMASK 0xff000000
109 #define WAITERMASK 0x000000ff
110 #define SPINNERMASK 0x00ff0000
111 #define SPINNERSHIFT 16
112 #define WAITER 0x00000001
113 #define LOCKSET 0xff
114 #define LOCKCLEAR 0
115
116 #define PIDSHIFT 32
117 #define LOCKMASK64 0xffffffffff000000ULL
118 #define LOCKBYTE64 0x00000000ff000000ULL
119 #define WAITERMASK64 0x00000000000000ffULL
120 #define SPINNERMASK64 0x0000000000ff0000ULL
121
122 #elif defined(__x86)
123
124 /* lock.lock64.pad[x] 7 6 5 4 */
125 #define LOCKMASK 0xff000000
126 #define WAITERMASK 0x00ff0000
127 #define SPINNERMASK 0x0000ff00
128 #define SPINNERSHIFT 8
129 #define WAITER 0x00010000
130 #define LOCKSET 0x01
131 #define LOCKCLEAR 0
132
133 #define PIDSHIFT 0
134 #define LOCKMASK64 0xff000000ffffffffULL
135 #define LOCKBYTE64 0x0100000000000000ULL
136 #define WAITERMASK64 0x00ff000000000000ULL
137 #define SPINNERMASK64 0x0000ff0000000000ULL
138
139 #else
140 #error "neither __sparc nor __x86 is defined"
141 #endif
142
143 /*
144 * Fetch the owner of a USYNC_THREAD mutex.
145 * Don't use this with process-shared mutexes;
146 * the owing thread may be in a different process.
147 */
148 #define MUTEX_OWNER(mp) ((ulwp_t *)(uintptr_t)(mp)->mutex_owner)
149
150 /*
151 * Test if a thread owns a process-private (USYNC_THREAD) mutex.
152 * This is inappropriate for a process-shared (USYNC_PROCESS) mutex.
153 * The 'mp' argument must not have side-effects since it is evaluated twice.
154 */
155 #define MUTEX_OWNED(mp, thrp) \
156 ((mp)->mutex_lockw != 0 && MUTEX_OWNER(mp) == thrp)
157
158
159 /*
160 * uberflags.uf_tdb_register_sync is an interface with libc_db to enable the
161 * collection of lock statistics by a debugger or other collecting tool.
162 *
163 * uberflags.uf_thread_error_detection is set by an environment variable:
164 * _THREAD_ERROR_DETECTION
165 * 0 == no detection of locking primitive errors.
166 * 1 == detect errors and issue a warning message.
167 * 2 == detect errors, issue a warning message, and dump core.
168 *
169 * We bundle these together in uberflags.uf_trs_ted to make a test of either
170 * being non-zero a single memory reference (for speed of mutex_lock(), etc).
171 *
172 * uberflags.uf_mt is set non-zero when the first thread (in addition
173 * to the main thread) is created.
174 *
175 * We bundle all these flags together in uberflags.uf_all to make a test
176 * of any being non-zero a single memory reference (again, for speed).
177 */
178 typedef union {
179 int uf_all; /* combined all flags */
180 struct {
181 short h_pad;
182 short h_trs_ted; /* combined reg sync & error detect */
183 } uf_h;
184 struct {
185 char x_mt;
186 char x_pad;
187 char x_tdb_register_sync;
188 char x_thread_error_detection;
189 } uf_x;
190 } uberflags_t;
191
192 #define uf_mt uf_x.x_mt
193 #define uf_tdb_register_sync uf_x.x_tdb_register_sync
194 #define uf_thread_error_detection uf_x.x_thread_error_detection
195 #define uf_trs_ted uf_h.h_trs_ted /* both of the above */
196
197 /*
198 * NOTE WELL:
199 * To enable further optimization, the "ul_schedctl_called" member
200 * of the ulwp_t structure (below) serves double-duty:
201 * 1. If NULL, it means that the thread must call __schedctl()
202 * to set up its schedctl mappings before acquiring a mutex.
203 * This is required by the implementation of adaptive mutex locking.
204 * 2. If non-NULL, it points to uberdata.uberflags, so that tests of
205 * uberflags can be made without additional memory references.
206 * This allows the common case of _mutex_lock() and _mutex_unlock() for
207 * USYNC_THREAD mutexes with no error detection and no lock statistics
208 * to be optimized for speed.
209 */
210
211 /* double the default stack size for 64-bit processes */
212 #ifdef _LP64
213 #define MINSTACK (8 * 1024)
214 #define DEFAULTSTACK (2 * 1024 * 1024)
215 #else
216 #define MINSTACK (4 * 1024)
217 #define DEFAULTSTACK (1024 * 1024)
218 #endif
219
220 #define MUTEX_TRY 0
221 #define MUTEX_LOCK 1
222 #define MUTEX_NOCEIL 0x40
223
224 #if defined(__x86)
225
226 typedef struct { /* structure returned by fnstenv */
227 int fctrl; /* control word */
228 int fstat; /* status word (flags, etc) */
229 int ftag; /* tag of which regs busy */
230 int misc[4]; /* other stuff, 28 bytes total */
231 } fpuenv_t;
232
233 #ifdef _SYSCALL32
234 typedef fpuenv_t fpuenv32_t;
235 #endif /* _SYSCALL32 */
236
237 #elif defined(__sparc)
238
239 typedef struct { /* fp state structure */
240 greg_t fsr;
241 greg_t fpu_en;
242 } fpuenv_t;
243
244 #ifdef _SYSCALL32
245 typedef struct {
246 greg32_t fsr;
247 greg32_t fpu_en;
248 } fpuenv32_t;
249 #endif /* _SYSCALL32 */
250
251 #endif /* __x86 */
252
253 #if defined(__x86)
254 extern void ht_pause(void); /* "pause" instruction */
255 #define SMT_PAUSE() ht_pause()
256 #elif defined(SMT_PAUSE_FUNCTION)
257 extern void SMT_PAUSE_FUNCTION(void);
258 #define SMT_PAUSE() SMT_PAUSE_FUNCTION()
259 #else
260 #define SMT_PAUSE() smt_pause()
261 #endif /* __x86 */
262
263 /*
264 * Cleanup handler related data.
265 * This structure is exported as _cleanup_t in pthread.h.
266 * pthread.h exports only the size of this structure, so check
267 * _cleanup_t in pthread.h before making any change here.
268 */
269 typedef struct __cleanup {
270 struct __cleanup *next; /* pointer to next handler */
271 caddr_t fp; /* current frame pointer */
272 void (*func)(void *); /* cleanup handler address */
273 void *arg; /* handler's argument */
274 } __cleanup_t;
275
276 /*
277 * Thread-Specific Data (TSD)
278 * TSD_NFAST includes the invalid key zero, so there
279 * are really only (TSD_NFAST - 1) fast key slots.
280 */
281 typedef void (*PFrV)(void *);
282 #define TSD_UNALLOCATED ((PFrV)1)
283 #define TSD_NFAST 9
284
285 /*
286 * The tsd union is designed to burn a little memory (9 words) to make
287 * lookups blindingly fast. Note that tsd_nalloc could be placed at the
288 * end of the pad region to increase the likelihood that it falls on the
289 * same cache line as the data.
290 */
291 typedef union tsd {
292 uint_t tsd_nalloc; /* Amount of allocated storage */
293 void *tsd_pad[TSD_NFAST];
294 void *tsd_data[1];
295 } tsd_t;
296
297 typedef struct {
298 mutex_t tsdm_lock; /* Lock protecting the data */
299 uint_t tsdm_nkeys; /* Number of allocated keys */
300 uint_t tsdm_nused; /* Number of used keys */
301 PFrV *tsdm_destro; /* Per-key destructors */
302 char tsdm_pad[64 - /* pad to 64 bytes */
303 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (PFrV *))];
304 } tsd_metadata_t;
305
306 #ifdef _SYSCALL32
307 typedef union tsd32 {
308 uint_t tsd_nalloc; /* Amount of allocated storage */
309 caddr32_t tsd_pad[TSD_NFAST];
310 caddr32_t tsd_data[1];
311 } tsd32_t;
312
313 typedef struct {
314 mutex_t tsdm_lock; /* Lock protecting the data */
315 uint_t tsdm_nkeys; /* Number of allocated keys */
316 uint_t tsdm_nused; /* Number of used keys */
317 caddr32_t tsdm_destro; /* Per-key destructors */
318 char tsdm_pad[64 - /* pad to 64 bytes */
319 (sizeof (mutex_t) + 2 * sizeof (uint_t) + sizeof (caddr32_t))];
320 } tsd_metadata32_t;
321 #endif /* _SYSCALL32 */
322
323
324 /*
325 * Thread-Local Storage (TLS)
326 */
327 typedef struct {
328 void *tls_data;
329 size_t tls_size;
330 } tls_t;
331
332 typedef struct {
333 mutex_t tls_lock; /* Lock protecting the data */
334 tls_t tls_modinfo; /* Root of all TLS_modinfo data */
335 tls_t static_tls; /* Template for static TLS */
336 char tls_pad[64 - /* pad to 64 bytes */
337 (sizeof (mutex_t) + 2 * sizeof (tls_t))];
338 } tls_metadata_t;
339
340 #ifdef _SYSCALL32
341 typedef struct {
342 caddr32_t tls_data;
343 size32_t tls_size;
344 } tls32_t;
345
346 typedef struct {
347 mutex_t tls_lock; /* Lock protecting the data */
348 tls32_t tls_modinfo; /* Root of all TLS_modinfo data */
349 tls32_t static_tls; /* Template for static TLS */
350 char tls_pad[64 - /* pad to 64 bytes */
351 (sizeof (mutex_t) + 2 * sizeof (tls32_t))];
352 } tls_metadata32_t;
353 #endif /* _SYSCALL32 */
354
355
356 /*
357 * Sleep queue root for USYNC_THREAD condvars and mutexes.
358 * There is a default queue root for each queue head (see below).
359 * Also, each ulwp_t contains a queue root that can be used
360 * when the thread is enqueued on the queue, if necessary
361 * (when more than one wchan hashes to the same queue head).
362 */
363 typedef struct queue_root {
364 struct queue_root *qr_next;
365 struct queue_root *qr_prev;
366 struct ulwp *qr_head;
367 struct ulwp *qr_tail;
368 void *qr_wchan;
369 uint32_t qr_rtcount;
370 uint32_t qr_qlen;
371 uint32_t qr_qmax;
372 } queue_root_t;
373
374 #ifdef _SYSCALL32
375 typedef struct queue_root32 {
376 caddr32_t qr_next;
377 caddr32_t qr_prev;
378 caddr32_t qr_head;
379 caddr32_t qr_tail;
380 caddr32_t qr_wchan;
381 uint32_t qr_rtcount;
382 uint32_t qr_qlen;
383 uint32_t qr_qmax;
384 } queue_root32_t;
385 #endif
386
387 /*
388 * Sleep queue heads for USYNC_THREAD condvars and mutexes.
389 * The size and alignment is 128 bytes to reduce cache conflicts.
390 * Each queue head points to a list of queue roots, defined above.
391 * Each queue head contains a default queue root for use when only one
392 * is needed. It is always at the tail of the queue root hash chain.
393 */
394 typedef union {
395 uint64_t qh_64[16];
396 struct {
397 mutex_t q_lock;
398 uint8_t q_qcnt;
399 uint8_t q_type; /* MX or CV */
400 uint8_t q_pad1[2];
401 uint32_t q_lockcount;
402 uint32_t q_qlen;
403 uint32_t q_qmax;
404 void *q_wchan; /* valid only while locked */
405 struct queue_root *q_root; /* valid only while locked */
406 struct queue_root *q_hlist;
407 #if !defined(_LP64)
408 caddr_t q_pad2[3];
409 #endif
410 queue_root_t q_def_root;
411 uint32_t q_hlen;
412 uint32_t q_hmax;
413 } qh_qh;
414 } queue_head_t;
415
416 #define qh_lock qh_qh.q_lock
417 #define qh_qcnt qh_qh.q_qcnt
418 #define qh_type qh_qh.q_type
419 #if defined(THREAD_DEBUG)
420 #define qh_lockcount qh_qh.q_lockcount
421 #define qh_qlen qh_qh.q_qlen
422 #define qh_qmax qh_qh.q_qmax
423 #endif
424 #define qh_wchan qh_qh.q_wchan
425 #define qh_root qh_qh.q_root
426 #define qh_hlist qh_qh.q_hlist
427 #define qh_def_root qh_qh.q_def_root
428 #define qh_hlen qh_qh.q_hlen
429 #define qh_hmax qh_qh.q_hmax
430
431 /* queue types passed to queue_lock() */
432 #define MX 0
433 #define CV 1
434 #define QHASHSHIFT 9 /* number of hashing bits */
435 #define QHASHSIZE (1 << QHASHSHIFT) /* power of 2 (1<<9 == 512) */
436 #define QUEUE_HASH(wchan, type) ((uint_t) \
437 ((((uintptr_t)(wchan) >> 3) \
438 ^ ((uintptr_t)(wchan) >> (QHASHSHIFT + 3))) \
439 & (QHASHSIZE - 1)) + (((type) == MX)? 0 : QHASHSIZE))
440
441 extern queue_head_t *queue_lock(void *, int);
442 extern void queue_unlock(queue_head_t *);
443 extern void enqueue(queue_head_t *, struct ulwp *, int);
444 extern struct ulwp *dequeue(queue_head_t *, int *);
445 extern struct ulwp **queue_slot(queue_head_t *, struct ulwp **, int *);
446 extern struct ulwp *queue_waiter(queue_head_t *);
447 extern int dequeue_self(queue_head_t *);
448 extern void queue_unlink(queue_head_t *,
449 struct ulwp **, struct ulwp *);
450 extern void unsleep_self(void);
451 extern void spin_lock_set(mutex_t *);
452 extern void spin_lock_clear(mutex_t *);
453
454 /*
455 * Scheduling class information structure.
456 */
457 typedef struct {
458 short pcc_state;
459 short pcc_policy;
460 pri_t pcc_primin;
461 pri_t pcc_primax;
462 pcinfo_t pcc_info;
463 } pcclass_t;
464
465 /*
466 * Memory block for chain of owned ceiling mutexes.
467 */
468 typedef struct mxchain {
469 struct mxchain *mxchain_next;
470 mutex_t *mxchain_mx;
471 } mxchain_t;
472
473 /*
474 * Pointer to an rwlock that is held for reading.
475 * Used in rw_rdlock() to allow a thread that already holds a read
476 * lock to acquire another read lock on the same rwlock even if
477 * there are writers waiting. This to avoid deadlock when acquiring
478 * a read lock more than once in the presence of pending writers.
479 * POSIX mandates this behavior.
480 */
481 typedef struct {
482 void *rd_rwlock; /* the rwlock held for reading */
483 size_t rd_count; /* count of read locks applied */
484 } readlock_t;
485
486 #ifdef _SYSCALL32
487 typedef struct {
488 caddr32_t rd_rwlock;
489 size32_t rd_count;
490 } readlock32_t;
491 #endif /* _SYSCALL32 */
492
493 /*
494 * As part of per-thread caching libumem (ptcumem), we add a small amount to the
495 * thread's uberdata to facilitate it. The tm_roots are the roots of linked
496 * lists which is used by libumem to chain together allocations. tm_size is used
497 * to track the total amount of data stored across those linked lists. For more
498 * information, see libumem's big theory statement.
499 */
500 #define NTMEMBASE 16
501
502 typedef struct {
503 size_t tm_size;
504 void *tm_roots[NTMEMBASE];
505 } tumem_t;
506
507 #ifdef _SYSCALL32
508 typedef struct {
509 uint32_t tm_size;
510 caddr32_t tm_roots[NTMEMBASE];
511 } tumem32_t;
512 #endif
513
514 typedef void (*tmem_func_t)(void *, int);
515
516 /*
517 * Maximum number of read locks allowed for one thread on one rwlock.
518 * This could be as large as INT_MAX, but the SUSV3 test suite would
519 * take an inordinately long time to complete. This is big enough.
520 */
521 #define READ_LOCK_MAX 100000
522
523 #define ul_tlsent ul_tls.tls_data /* array of pointers to dynamic TLS */
524 #define ul_ntlsent ul_tls.tls_size /* number of entries in ul_tlsent */
525
526 /*
527 * Round up an integral value to a multiple of 64
528 */
529 #define roundup64(x) (-(-(x) & -64))
530
531 /*
532 * NOTE: Whatever changes are made to ulwp_t must be
533 * reflected in $SRC/cmd/mdb/common/modules/libc/libc.c
534 *
535 * NOTE: ul_self *must* be the first member of ulwp_t on x86
536 * Low-level x86 code relies on this.
537 */
538 typedef struct ulwp {
539 /*
540 * These members always need to come first on sparc.
541 * For dtrace, a ulwp_t must be aligned on a 64-byte boundary.
542 */
543 #if defined(__sparc)
544 uint32_t ul_dinstr; /* scratch space for dtrace */
545 uint32_t ul_padsparc0[15];
546 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */
547 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */
548 uint32_t ul_dftret; /* dtrace: return probe fasttrap */
549 uint32_t ul_dreturn; /* dtrace: return %o0 */
550 #endif
551 struct ulwp *ul_self; /* pointer to self */
552 #if defined(__i386)
553 uint8_t ul_dinstr[40]; /* scratch space for dtrace */
554 #elif defined(__amd64)
555 uint8_t ul_dinstr[56]; /* scratch space for dtrace */
556 #endif
557 struct uberdata *ul_uberdata; /* uber (super-global) data */
558 tls_t ul_tls; /* dynamic thread-local storage base */
559 struct ulwp *ul_forw; /* forw, back all_lwps list, */
560 struct ulwp *ul_back; /* protected by link_lock */
561 struct ulwp *ul_next; /* list to keep track of stacks */
562 struct ulwp *ul_hash; /* hash chain linked list */
563 void *ul_rval; /* return value from thr_exit() */
564 caddr_t ul_stk; /* mapping base of the stack */
565 size_t ul_mapsiz; /* mapping size of the stack */
566 size_t ul_guardsize; /* normally _lpagesize */
567 uintptr_t ul_stktop; /* broken thr_stksegment() interface */
568 size_t ul_stksiz; /* broken thr_stksegment() interface */
569 stack_t ul_ustack; /* current stack boundaries */
570 int ul_ix; /* hash index */
571 lwpid_t ul_lwpid; /* thread id, aka the lwp id */
572 pri_t ul_pri; /* scheduling priority */
573 pri_t ul_epri; /* real-time ceiling priority */
574 char ul_policy; /* scheduling policy */
575 char ul_cid; /* scheduling class id */
576 union {
577 struct {
578 char cursig; /* deferred signal number */
579 char pleasestop; /* lwp requested to stop itself */
580 } s;
581 short curplease; /* for testing both at once */
582 } ul_cp;
583 char ul_stop; /* reason for stopping */
584 char ul_signalled; /* this lwp was cond_signal()d */
585 char ul_dead; /* this lwp has called thr_exit */
586 char ul_unwind; /* posix: unwind C++ stack */
587 char ul_detached; /* THR_DETACHED at thread_create() */
588 /* or pthread_detach() was called */
589 char ul_writer; /* sleeping in rw_wrlock() */
590 char ul_stopping; /* set by curthread: stopping self */
591 char ul_cancel_prologue; /* for _cancel_prologue() */
592 short ul_preempt; /* no_preempt()/preempt() */
593 short ul_savpreempt; /* pre-existing preempt value */
594 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */
595 char ul_main; /* thread is the main thread */
596 char ul_fork; /* thread is performing a fork */
597 char ul_primarymap; /* primary link-map is initialized */
598 /* per-thread copies of the corresponding global variables */
599 uint8_t ul_max_spinners; /* thread_max_spinners */
600 char ul_door_noreserve; /* thread_door_noreserve */
601 char ul_queue_fifo; /* thread_queue_fifo */
602 char ul_cond_wait_defer; /* thread_cond_wait_defer */
603 char ul_error_detection; /* thread_error_detection */
604 char ul_async_safe; /* thread_async_safe */
605 char ul_rt; /* found on an RT queue */
606 char ul_rtqueued; /* was RT when queued */
607 char ul_misaligned; /* thread_locks_misaligned */
608 char ul_pad[3];
609 int ul_adaptive_spin; /* thread_adaptive_spin */
610 int ul_queue_spin; /* thread_queue_spin */
611 volatile int ul_critical; /* non-zero == in a critical region */
612 int ul_sigdefer; /* non-zero == defer signals */
613 int ul_vfork; /* thread is the child of vfork() */
614 int ul_cancelable; /* _cancelon()/_canceloff() */
615 char ul_cancel_pending; /* pthread_cancel() was called */
616 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */
617 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */
618 char ul_save_async; /* saved copy of ul_cancel_async */
619 char ul_mutator; /* lwp is a mutator (java interface) */
620 char ul_created; /* created suspended */
621 char ul_replace; /* replacement; must be free()d */
622 uchar_t ul_nocancel; /* cancellation can't happen */
623 int ul_errno; /* per-thread errno */
624 int *ul_errnop; /* pointer to errno or self->ul_errno */
625 __cleanup_t *ul_clnup_hdr; /* head of cleanup handlers list */
626 uberflags_t *ul_schedctl_called; /* ul_schedctl is set up */
627 volatile sc_shared_t *ul_schedctl; /* schedctl data */
628 int ul_bindflags; /* bind_guard() interface to ld.so.1 */
629 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */
630 tsd_t *ul_stsd; /* slow TLS for keys >= TSD_NFAST */
631 void *ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */
632 td_evbuf_t ul_td_evbuf; /* event buffer */
633 char ul_td_events_enable; /* event mechanism enabled */
634 char ul_sync_obj_reg; /* tdb_sync_obj_register() */
635 char ul_qtype; /* MX or CV */
636 char ul_cv_wake; /* != 0: just wake up, don't requeue */
637 int ul_rtld; /* thread is running inside ld.so.1 */
638 int ul_usropts; /* flags given to thr_create() */
639 void *(*ul_startpc)(void *); /* start func (thr_create()) */
640 void *ul_startarg; /* argument for start function */
641 void *ul_wchan; /* synch object when sleeping */
642 struct ulwp *ul_link; /* sleep queue link */
643 queue_head_t *ul_sleepq; /* sleep queue thread is waiting on */
644 mutex_t *ul_cvmutex; /* mutex dropped when waiting on a cv */
645 mxchain_t *ul_mxchain; /* chain of owned ceiling mutexes */
646 int ul_save_state; /* bind_guard() interface to ld.so.1 */
647 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */
648 /* 0 means there is but a single entry */
649 union { /* single entry or pointer to array */
650 readlock_t single;
651 readlock_t *array;
652 } ul_readlock;
653 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */
654 /* 0 means there is but a single entry */
655 union { /* single entry or pointer to array */
656 mutex_t *single;
657 mutex_t **array;
658 } ul_heldlocks;
659 /* PROBE_SUPPORT begin */
660 void *ul_tpdp;
661 /* PROBE_SUPPORT end */
662 ucontext_t *ul_siglink; /* pointer to previous context */
663 uint_t ul_spin_lock_spin; /* spin lock statistics */
664 uint_t ul_spin_lock_spin2;
665 uint_t ul_spin_lock_sleep;
666 uint_t ul_spin_lock_wakeup;
667 queue_root_t ul_queue_root; /* root of a sleep queue */
668 id_t ul_rtclassid; /* real-time class id */
669 uint_t ul_pilocks; /* count of PI locks held */
670 /* the following members *must* be last in the structure */
671 /* they are discarded when ulwp is replaced on thr_exit() */
672 sigset_t ul_sigmask; /* thread's current signal mask */
673 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */
674 siginfo_t ul_siginfo; /* deferred siginfo */
675 mutex_t ul_spinlock; /* used when suspending/continuing */
676 fpuenv_t ul_fpuenv; /* floating point state */
677 uintptr_t ul_sp; /* stack pointer when blocked */
678 void *ul_ex_unwind; /* address of _ex_unwind() or -1 */
679 #if defined(sparc)
680 void *ul_unwind_ret; /* used only by _ex_clnup_handler() */
681 #endif
682 tumem_t ul_tmem; /* used only by umem */
683 uint_t ul_ptinherit; /* pthreads sched inherit value */
684 } ulwp_t;
685
686 #define ul_cursig ul_cp.s.cursig /* deferred signal number */
687 #define ul_pleasestop ul_cp.s.pleasestop /* lwp requested to stop */
688 #define ul_curplease ul_cp.curplease /* for testing both at once */
689
690 /*
691 * This is the size of a replacement ulwp, retained only for the benefit
692 * of thr_join(). The trailing members are unneeded for this purpose.
693 */
694 #define REPLACEMENT_SIZE ((size_t)&((ulwp_t *)NULL)->ul_sigmask)
695
696 /*
697 * Definitions for static initialization of signal sets,
698 * plus some sneaky optimizations in various places.
699 */
700
701 #define SIGMASK(sig) ((uint32_t)1 << (((sig) - 1) & (32 - 1)))
702
703 #if (MAXSIG > (2 * 32) && MAXSIG <= (3 * 32))
704 #define FILLSET0 0xffffffffu
705 #define FILLSET1 0xffffffffu
706 #define FILLSET2 ((1u << (MAXSIG - 64)) - 1)
707 #define FILLSET3 0
708 #else
709 #error "fix me: MAXSIG out of bounds"
710 #endif
711
712 #define CANTMASK0 (SIGMASK(SIGKILL) | SIGMASK(SIGSTOP))
713 #define CANTMASK1 0
714 #define CANTMASK2 0
715 #define CANTMASK3 0
716
717 #define MASKSET0 (FILLSET0 & ~CANTMASK0)
718 #define MASKSET1 (FILLSET1 & ~CANTMASK1)
719 #define MASKSET2 (FILLSET2 & ~CANTMASK2)
720 #define MASKSET3 (FILLSET3 & ~CANTMASK3)
721
722 extern const sigset_t maskset; /* set of all maskable signals */
723
724 extern int thread_adaptive_spin;
725 extern uint_t thread_max_spinners;
726 extern int thread_queue_spin;
727 extern int thread_queue_fifo;
728 extern int thread_queue_dump;
729 extern int thread_cond_wait_defer;
730 extern int thread_async_safe;
731 extern int thread_queue_verify;
732
733 /*
734 * pthread_atfork() related data, used to store atfork handlers.
735 */
736 typedef struct atfork {
737 struct atfork *forw; /* forward pointer */
738 struct atfork *back; /* backward pointer */
739 void (*prepare)(void); /* pre-fork handler */
740 void (*parent)(void); /* post-fork parent handler */
741 void (*child)(void); /* post-fork child handler */
742 } atfork_t;
743
744 /*
745 * Element in the table and in the list of registered process
746 * robust locks. We keep track of these to make sure that we
747 * only call ___lwp_mutex_register() once for each such lock
748 * after it is first mapped in (or newly mapped in).
749 */
750 typedef struct robust {
751 struct robust *robust_next; /* hash table list */
752 struct robust *robust_list; /* global list */
753 mutex_t *robust_lock;
754 } robust_t;
755
756 /*
757 * Invalid address, used to mark an unused element in the hash table.
758 */
759 #define INVALID_ADDR ((void *)(uintptr_t)(-1L))
760
761 /*
762 * Parameters of the lock registration hash table.
763 */
764 #define LOCKSHIFT 15 /* number of hashing bits */
765 #define LOCKHASHSZ (1 << LOCKSHIFT) /* power of 2 (1<<15 == 32K) */
766 #define LOCK_HASH(addr) (uint_t) \
767 ((((uintptr_t)(addr) >> 3) \
768 ^ ((uintptr_t)(addr) >> (LOCKSHIFT + 3))) \
769 & (LOCKHASHSZ - 1))
770
771 /*
772 * Make our hot locks reside on private cache lines (64 bytes).
773 */
774 typedef struct {
775 mutex_t pad_lock;
776 char pad_pad[64 - sizeof (mutex_t)];
777 } pad_lock_t;
778
779 /*
780 * Make our semi-hot locks reside on semi-private cache lines (32 bytes).
781 */
782 typedef struct {
783 mutex_t pad_lock;
784 char pad_pad[32 - sizeof (mutex_t)];
785 } pad32_lock_t;
786
787 /*
788 * The threads hash table is used for fast lookup and locking of an active
789 * thread structure (ulwp_t) given a thread-id. It is an N-element array of
790 * thr_hash_table_t structures, where N == 1 before the main thread creates
791 * the first additional thread and N == 1024 afterwards. Each element of the
792 * table is 64 bytes in size and alignment to reduce cache conflicts.
793 */
794 typedef struct {
795 mutex_t hash_lock; /* lock per bucket */
796 cond_t hash_cond; /* convar per bucket */
797 ulwp_t *hash_bucket; /* hash bucket points to the list of ulwps */
798 char hash_pad[64 - /* pad out to 64 bytes */
799 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (ulwp_t *))];
800 } thr_hash_table_t;
801
802 #ifdef _SYSCALL32
803 typedef struct {
804 mutex_t hash_lock;
805 cond_t hash_cond;
806 caddr32_t hash_bucket;
807 char hash_pad[64 -
808 (sizeof (mutex_t) + sizeof (cond_t) + sizeof (caddr32_t))];
809 } thr_hash_table32_t;
810 #endif /* _SYSCALL32 */
811
812
813 /*
814 * siguaction members have 128-byte size and 64-byte alignment.
815 * We know that sizeof (struct sigaction) is 32 bytes for both
816 * _ILP32 and _LP64 and that sizeof (rwlock_t) is 64 bytes.
817 */
818 typedef struct {
819 rwlock_t sig_lock;
820 struct sigaction sig_uaction;
821 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction)];
822 } siguaction_t;
823
824 #ifdef _SYSCALL32
825 typedef struct {
826 rwlock_t sig_lock;
827 struct sigaction32 sig_uaction;
828 char sig_pad[128 - sizeof (rwlock_t) - sizeof (struct sigaction32)];
829 } siguaction32_t;
830 #endif /* _SYSCALL32 */
831
832
833 /*
834 * Bucket structures, used by lmalloc()/lfree().
835 * See port/threads/alloc.c for details.
836 * A bucket's size and alignment is 64 bytes.
837 */
838 typedef struct {
839 mutex_t bucket_lock; /* protects the free list allocations */
840 void *free_list; /* LIFO list of blocks to allocate/free */
841 size_t chunks; /* number of 64K blocks mmap()ed last time */
842 char pad64[64 - /* pad out to 64 bytes */
843 (sizeof (mutex_t) + sizeof (void *) + sizeof (size_t))];
844 } bucket_t;
845
846 #ifdef _SYSCALL32
847 typedef struct {
848 mutex_t bucket_lock;
849 caddr32_t free_list;
850 size32_t chunks;
851 char pad64[64 - /* pad out to 64 bytes */
852 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (size32_t))];
853 } bucket32_t;
854 #endif /* _SYSCALL32 */
855
856 #define NBUCKETS 10 /* sizes ranging from 64 to 32768 */
857
858
859 /*
860 * atexit() data structures.
861 * See port/gen/atexit.c for details.
862 */
863 typedef void (*_exithdlr_func_t) (void*);
864
865 typedef struct _exthdlr {
866 struct _exthdlr *next; /* next in handler list */
867 _exithdlr_func_t hdlr; /* handler itself */
868 void *arg; /* argument to handler */
869 void *dso; /* DSO associated with handler */
870 } _exthdlr_t;
871
872 typedef struct {
873 mutex_t exitfns_lock;
874 _exthdlr_t *head;
875 /*
876 * exit_frame_monitor is part of a private contract between libc and
877 * the Sun C++ runtime.
878 *
879 * It should be NULL until exit() is called, and thereafter hold the
880 * frame pointer of the function implementing our exit processing.
881 */
882 void *exit_frame_monitor;
883 char exit_pad[64 - /* pad out to 64 bytes */
884 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))];
885 } atexit_root_t;
886
887 #ifdef _SYSCALL32
888 typedef struct {
889 mutex_t exitfns_lock;
890 caddr32_t head;
891 caddr32_t exit_frame_monitor;
892 char exit_pad[64 - /* pad out to 64 bytes */
893 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))];
894 } atexit_root32_t;
895 #endif /* _SYSCALL32 */
896
897 /*
898 * at_quick_exit() and quick_exit() data structures. The ISO/IEC C11 odd
899 * siblings of atexit()
900 */
901 typedef void (*_quick_exithdlr_func_t)(void);
902
903 typedef struct _qexthdlr {
904 struct _qexthdlr *next; /* next in handler list */
905 _quick_exithdlr_func_t hdlr; /* handler itself */
906 } _qexthdlr_t;
907
908 /*
909 * We add a pad on 32-bit systems to allow us to always have the structure size
910 * be 32-bytes which helps us deal with the compiler's alignment when building
911 * in ILP32 / LP64 systems.
912 */
913 typedef struct {
914 mutex_t exitfns_lock;
915 _qexthdlr_t *head;
916 #if !defined(_LP64)
917 uint32_t pad;
918 #endif
919 } quickexit_root_t;
920
921 #ifdef _SYSCALL32
922 typedef struct {
923 mutex_t exitfns_lock;
924 caddr32_t head;
925 uint32_t pad;
926 } quickexit_root32_t;
927 #endif /* _SYSCALL32 */
928
929 /*
930 * This is data that is global to all link maps (uberdata, aka super-global).
931 * Note: When changing this, please be sure to keep the 32-bit variant of
932 * this in sync. (see uberdata32_t below)
933 */
934 typedef struct uberdata {
935 pad_lock_t _link_lock;
936 pad_lock_t _ld_lock;
937 pad_lock_t _fork_lock;
938 pad_lock_t _atfork_lock;
939 pad32_lock_t _callout_lock;
940 pad32_lock_t _tdb_hash_lock;
941 tdb_sync_stats_t tdb_hash_lock_stats;
942 siguaction_t siguaction[NSIG];
943 bucket_t bucket[NBUCKETS];
944 atexit_root_t atexit_root;
945 quickexit_root_t quickexit_root;
946 tsd_metadata_t tsd_metadata;
947 tls_metadata_t tls_metadata;
948 /*
949 * Every object before this point has size and alignment of 64 bytes.
950 * Don't add any other type of data before this point.
951 */
952 char primary_map; /* set when primary link map is initialized */
953 char bucket_init; /* set when bucket[NBUCKETS] is initialized */
954 char pad[2];
955 uberflags_t uberflags;
956 queue_head_t *queue_head;
957 thr_hash_table_t *thr_hash_table;
958 uint_t hash_size; /* # of entries in thr_hash_table[] */
959 uint_t hash_mask; /* hash_size - 1 */
960 ulwp_t *ulwp_one; /* main thread */
961 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */
962 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */
963 int nthreads; /* total number of live threads/lwps */
964 int nzombies; /* total number of zombie threads */
965 int ndaemons; /* total number of THR_DAEMON threads/lwps */
966 pid_t pid; /* the current process's pid */
967 void (*sigacthandler)(int, siginfo_t *, void *);
968 ulwp_t *lwp_stacks;
969 ulwp_t *lwp_laststack;
970 int nfreestack;
971 int thread_stack_cache;
972 ulwp_t *ulwp_freelist;
973 ulwp_t *ulwp_lastfree;
974 ulwp_t *ulwp_replace_free;
975 ulwp_t *ulwp_replace_last;
976 atfork_t *atforklist; /* circular Q for fork handlers */
977 robust_t **robustlocks; /* table of registered robust locks */
978 robust_t *robustlist; /* list of registered robust locks */
979 char *progname; /* the basename of the program, from argv[0] */
980 void *ub_comm_page; /* arch-specific comm page of kernel data */
981 struct uberdata **tdb_bootstrap;
982 tdb_t tdb; /* thread debug interfaces (for libc_db) */
983 } uberdata_t;
984
985 #define link_lock _link_lock.pad_lock
986 #define ld_lock _ld_lock.pad_lock
987 #define fork_lock _fork_lock.pad_lock
988 #define atfork_lock _atfork_lock.pad_lock
989 #define callout_lock _callout_lock.pad_lock
990 #define tdb_hash_lock _tdb_hash_lock.pad_lock
991
992 #pragma align 64(__uberdata)
993 extern uberdata_t __uberdata;
994 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */
995 extern int primary_link_map;
996
997 #define ulwp_mutex(ulwp, udp) \
998 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock)
999 #define ulwp_condvar(ulwp, udp) \
1000 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond)
1001
1002 /*
1003 * Grab and release the hash table lock for the specified lwp.
1004 */
1005 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp))
1006 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp))
1007
1008 #ifdef _SYSCALL32 /* needed by libc_db */
1009
1010 typedef struct ulwp32 {
1011 #if defined(__sparc)
1012 uint32_t ul_dinstr; /* scratch space for dtrace */
1013 uint32_t ul_padsparc0[15];
1014 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */
1015 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */
1016 uint32_t ul_dftret; /* dtrace: return probe fasttrap */
1017 uint32_t ul_dreturn; /* dtrace: return %o0 */
1018 #endif
1019 caddr32_t ul_self; /* pointer to self */
1020 #if defined(__x86)
1021 uint8_t ul_dinstr[40]; /* scratch space for dtrace */
1022 #endif
1023 caddr32_t ul_uberdata; /* uber (super-global) data */
1024 tls32_t ul_tls; /* dynamic thread-local storage base */
1025 caddr32_t ul_forw; /* forw, back all_lwps list, */
1026 caddr32_t ul_back; /* protected by link_lock */
1027 caddr32_t ul_next; /* list to keep track of stacks */
1028 caddr32_t ul_hash; /* hash chain linked list */
1029 caddr32_t ul_rval; /* return value from thr_exit() */
1030 caddr32_t ul_stk; /* mapping base of the stack */
1031 size32_t ul_mapsiz; /* mapping size of the stack */
1032 size32_t ul_guardsize; /* normally _lpagesize */
1033 caddr32_t ul_stktop; /* broken thr_stksegment() interface */
1034 size32_t ul_stksiz; /* broken thr_stksegment() interface */
1035 stack32_t ul_ustack; /* current stack boundaries */
1036 int ul_ix; /* hash index */
1037 lwpid_t ul_lwpid; /* thread id, aka the lwp id */
1038 pri_t ul_pri; /* scheduling priority */
1039 pri_t ul_epri; /* real-time ceiling priority */
1040 char ul_policy; /* scheduling policy */
1041 char ul_cid; /* scheduling class id */
1042 union {
1043 struct {
1044 char cursig; /* deferred signal number */
1045 char pleasestop; /* lwp requested to stop itself */
1046 } s;
1047 short curplease; /* for testing both at once */
1048 } ul_cp;
1049 char ul_stop; /* reason for stopping */
1050 char ul_signalled; /* this lwp was cond_signal()d */
1051 char ul_dead; /* this lwp has called thr_exit */
1052 char ul_unwind; /* posix: unwind C++ stack */
1053 char ul_detached; /* THR_DETACHED at thread_create() */
1054 /* or pthread_detach() was called */
1055 char ul_writer; /* sleeping in rw_wrlock() */
1056 char ul_stopping; /* set by curthread: stopping self */
1057 char ul_cancel_prologue; /* for _cancel_prologue() */
1058 short ul_preempt; /* no_preempt()/preempt() */
1059 short ul_savpreempt; /* pre-existing preempt value */
1060 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */
1061 char ul_main; /* thread is the main thread */
1062 char ul_fork; /* thread is performing a fork */
1063 char ul_primarymap; /* primary link-map is initialized */
1064 /* per-thread copies of the corresponding global variables */
1065 uint8_t ul_max_spinners; /* thread_max_spinners */
1066 char ul_door_noreserve; /* thread_door_noreserve */
1067 char ul_queue_fifo; /* thread_queue_fifo */
1068 char ul_cond_wait_defer; /* thread_cond_wait_defer */
1069 char ul_error_detection; /* thread_error_detection */
1070 char ul_async_safe; /* thread_async_safe */
1071 char ul_rt; /* found on an RT queue */
1072 char ul_rtqueued; /* was RT when queued */
1073 char ul_misaligned; /* thread_locks_misaligned */
1074 char ul_pad[3];
1075 int ul_adaptive_spin; /* thread_adaptive_spin */
1076 int ul_queue_spin; /* thread_queue_spin */
1077 int ul_critical; /* non-zero == in a critical region */
1078 int ul_sigdefer; /* non-zero == defer signals */
1079 int ul_vfork; /* thread is the child of vfork() */
1080 int ul_cancelable; /* _cancelon()/_canceloff() */
1081 char ul_cancel_pending; /* pthread_cancel() was called */
1082 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */
1083 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */
1084 char ul_save_async; /* saved copy of ul_cancel_async */
1085 char ul_mutator; /* lwp is a mutator (java interface) */
1086 char ul_created; /* created suspended */
1087 char ul_replace; /* replacement; must be free()d */
1088 uchar_t ul_nocancel; /* cancellation can't happen */
1089 int ul_errno; /* per-thread errno */
1090 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */
1091 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */
1092 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */
1093 caddr32_t ul_schedctl; /* schedctl data */
1094 int ul_bindflags; /* bind_guard() interface to ld.so.1 */
1095 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */
1096 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */
1097 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */
1098 td_evbuf32_t ul_td_evbuf; /* event buffer */
1099 char ul_td_events_enable; /* event mechanism enabled */
1100 char ul_sync_obj_reg; /* tdb_sync_obj_register() */
1101 char ul_qtype; /* MX or CV */
1102 char ul_cv_wake; /* != 0: just wake up, don't requeue */
1103 int ul_rtld; /* thread is running inside ld.so.1 */
1104 int ul_usropts; /* flags given to thr_create() */
1105 caddr32_t ul_startpc; /* start func (thr_create()) */
1106 caddr32_t ul_startarg; /* argument for start function */
1107 caddr32_t ul_wchan; /* synch object when sleeping */
1108 caddr32_t ul_link; /* sleep queue link */
1109 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */
1110 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */
1111 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */
1112 int ul_save_state; /* bind_guard() interface to ld.so.1 */
1113 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */
1114 /* 0 means there is but a single entry */
1115 union { /* single entry or pointer to array */
1116 readlock32_t single;
1117 caddr32_t array;
1118 } ul_readlock;
1119 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */
1120 /* 0 means there is but a single entry */
1121 union { /* single entry or pointer to array */
1122 caddr32_t single;
1123 caddr32_t array;
1124 } ul_heldlocks;
1125 /* PROBE_SUPPORT begin */
1126 caddr32_t ul_tpdp;
1127 /* PROBE_SUPPORT end */
1128 caddr32_t ul_siglink; /* pointer to previous context */
1129 uint_t ul_spin_lock_spin; /* spin lock statistics */
1130 uint_t ul_spin_lock_spin2;
1131 uint_t ul_spin_lock_sleep;
1132 uint_t ul_spin_lock_wakeup;
1133 queue_root32_t ul_queue_root; /* root of a sleep queue */
1134 id_t ul_rtclassid; /* real-time class id */
1135 uint_t ul_pilocks; /* count of PI locks held */
1136 /* the following members *must* be last in the structure */
1137 /* they are discarded when ulwp is replaced on thr_exit() */
1138 sigset_t ul_sigmask; /* thread's current signal mask */
1139 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */
1140 siginfo32_t ul_siginfo; /* deferred siginfo */
1141 mutex_t ul_spinlock; /* used when suspending/continuing */
1142 fpuenv32_t ul_fpuenv; /* floating point state */
1143 caddr32_t ul_sp; /* stack pointer when blocked */
1144 #if defined(sparc)
1145 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */
1146 #endif
1147 tumem32_t ul_tmem; /* used only by umem */
1148 } ulwp32_t;
1149
1150 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask)
1151
1152 typedef struct uberdata32 {
1153 pad_lock_t _link_lock;
1154 pad_lock_t _ld_lock;
1155 pad_lock_t _fork_lock;
1156 pad_lock_t _atfork_lock;
1157 pad32_lock_t _callout_lock;
1158 pad32_lock_t _tdb_hash_lock;
1159 tdb_sync_stats_t tdb_hash_lock_stats;
1160 siguaction32_t siguaction[NSIG];
1161 bucket32_t bucket[NBUCKETS];
1162 atexit_root32_t atexit_root;
1163 quickexit_root32_t quickexit_root;
1164 tsd_metadata32_t tsd_metadata;
1165 tls_metadata32_t tls_metadata;
1166 char primary_map;
1167 char bucket_init;
1168 char pad[2];
1169 uberflags_t uberflags;
1170 caddr32_t queue_head;
1171 caddr32_t thr_hash_table;
1172 uint_t hash_size;
1173 uint_t hash_mask;
1174 caddr32_t ulwp_one;
1175 caddr32_t all_lwps;
1176 caddr32_t all_zombies;
1177 int nthreads;
1178 int nzombies;
1179 int ndaemons;
1180 int pid;
1181 caddr32_t sigacthandler;
1182 caddr32_t lwp_stacks;
1183 caddr32_t lwp_laststack;
1184 int nfreestack;
1185 int thread_stack_cache;
1186 caddr32_t ulwp_freelist;
1187 caddr32_t ulwp_lastfree;
1188 caddr32_t ulwp_replace_free;
1189 caddr32_t ulwp_replace_last;
1190 caddr32_t atforklist;
1191 caddr32_t robustlocks;
1192 caddr32_t robustlist;
1193 caddr32_t progname;
1194 caddr32_t ub_comm_page;
1195 caddr32_t tdb_bootstrap;
1196 tdb32_t tdb;
1197 } uberdata32_t;
1198
1199 #endif /* _SYSCALL32 */
1200
1201 /* ul_stop values */
1202 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */
1203 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */
1204 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */
1205
1206 /*
1207 * Implementation-specific attribute types for pthread_mutexattr_init() etc.
1208 */
1209
1210 typedef struct _cvattr {
1211 int pshared;
1212 clockid_t clockid;
1213 } cvattr_t;
1214
1215 typedef struct _mattr {
1216 int pshared;
1217 int protocol;
1218 int prioceiling;
1219 int type;
1220 int robustness;
1221 } mattr_t;
1222
1223 typedef struct _thrattr {
1224 size_t stksize;
1225 void *stkaddr;
1226 int detachstate;
1227 int daemonstate;
1228 int scope;
1229 int prio;
1230 int policy;
1231 int inherit;
1232 size_t guardsize;
1233 } thrattr_t;
1234
1235 typedef struct _rwlattr {
1236 int pshared;
1237 } rwlattr_t;
1238
1239 /* _curthread() is inline for speed */
1240 extern ulwp_t *_curthread(void);
1241 #define curthread (_curthread())
1242
1243 /* this version (also inline) can be tested for NULL */
1244 extern ulwp_t *__curthread(void);
1245
1246 /* get the current stack pointer (also inline) */
1247 extern greg_t stkptr(void);
1248
1249 /*
1250 * Suppress __attribute__((...)) if we are not compiling with gcc
1251 */
1252 #if !defined(__GNUC__)
1253 #define __attribute__(string)
1254 #endif
1255
1256 /* Fetch the dispatch (kernel) priority of a thread */
1257 #define real_priority(ulwp) \
1258 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0)
1259
1260 /*
1261 * Implementation functions. Not visible outside of the library itself.
1262 */
1263 extern int __nanosleep(const timespec_t *, timespec_t *);
1264 extern void getgregs(ulwp_t *, gregset_t);
1265 extern void setgregs(ulwp_t *, gregset_t);
1266 extern void thr_panic(const char *);
1267 #pragma rarely_called(thr_panic)
1268 extern void mutex_panic(mutex_t *, const char *);
1269 #pragma rarely_called(mutex_panic)
1270 extern ulwp_t *find_lwp(thread_t);
1271 extern void finish_init(void);
1272 extern void update_sched(ulwp_t *);
1273 extern void queue_alloc(void);
1274 extern void tmem_exit(void);
1275 extern void tsd_exit(void);
1276 extern void tsd_free(ulwp_t *);
1277 extern void tls_setup(void);
1278 extern void tls_exit(void);
1279 extern void tls_free(ulwp_t *);
1280 extern void rwl_free(ulwp_t *);
1281 extern void heldlock_exit(void);
1282 extern void heldlock_free(ulwp_t *);
1283 extern void sigacthandler(int, siginfo_t *, void *);
1284 extern void signal_init(void);
1285 extern int sigequalset(const sigset_t *, const sigset_t *);
1286 extern void mutex_setup(void);
1287 extern void take_deferred_signal(int);
1288 extern void *setup_top_frame(void *, size_t, ulwp_t *);
1289 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *),
1290 ulwp_t *ulwp, caddr_t stk, size_t stksize);
1291 extern volatile sc_shared_t *setup_schedctl(void);
1292 extern void *lmalloc(size_t);
1293 extern void lfree(void *, size_t);
1294 extern void *libc_malloc(size_t);
1295 extern void *libc_realloc(void *, size_t);
1296 extern void libc_free(void *);
1297 extern char *libc_strdup(const char *);
1298 extern void ultos(uint64_t, int, char *);
1299 extern void lock_error(const mutex_t *, const char *, void *, const char *);
1300 extern void rwlock_error(const rwlock_t *, const char *, const char *);
1301 extern void thread_error(const char *);
1302 extern void grab_assert_lock(void);
1303 extern void dump_queue_statistics(void);
1304 extern void collect_queue_statistics(void);
1305 extern void record_spin_locks(ulwp_t *);
1306 extern void remember_lock(mutex_t *);
1307 extern void forget_lock(mutex_t *);
1308 extern void register_lock(mutex_t *);
1309 extern void unregister_locks(void);
1310 #if defined(__sparc)
1311 extern void _flush_windows(void);
1312 #else
1313 #define _flush_windows()
1314 #endif
1315 extern void set_curthread(void *);
1316
1317 /*
1318 * Utility function used when waking up many threads (more than MAXLWPS)
1319 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock().
1320 */
1321 #define MAXLWPS 128 /* max remembered lwpids before overflow */
1322 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */
1323 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *);
1324
1325 /* enter a critical section */
1326 #define enter_critical(self) (self->ul_critical++)
1327
1328 /* exit a critical section, take deferred actions if necessary */
1329 extern void do_exit_critical(void);
1330 #define exit_critical(self) \
1331 (void) (self->ul_critical--, \
1332 ((self->ul_curplease && self->ul_critical == 0)? \
1333 (do_exit_critical(), 0) : 0))
1334
1335 /*
1336 * Like enter_critical()/exit_critical() but just for deferring signals.
1337 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while
1338 * calling application functions like constructors and destructors.
1339 * Care must be taken if the application function attempts to set
1340 * the signal mask while a deferred signal is present; the setting
1341 * of the signal mask must also be deferred.
1342 */
1343 #define sigoff(self) (self->ul_sigdefer++)
1344 #define sigon(self) \
1345 (void) ((--self->ul_sigdefer == 0 && \
1346 self->ul_curplease && self->ul_critical == 0)? \
1347 (do_exit_critical(), 0) : 0)
1348
1349 /* these are exported functions */
1350 extern void _sigoff(void);
1351 extern void _sigon(void);
1352
1353 #define sigorset(s1, s2) \
1354 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \
1355 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \
1356 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \
1357 ((s1)->__sigbits[3] |= (s2)->__sigbits[3]))
1358
1359 #define sigandset(s1, s2) \
1360 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \
1361 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \
1362 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \
1363 ((s1)->__sigbits[3] &= (s2)->__sigbits[3]))
1364
1365 #define sigdiffset(s1, s2) \
1366 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \
1367 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \
1368 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \
1369 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3]))
1370
1371 #define delete_reserved_signals(s) \
1372 (((s)->__sigbits[0] &= MASKSET0), \
1373 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\
1374 ((s)->__sigbits[2] &= MASKSET2), \
1375 ((s)->__sigbits[3] &= MASKSET3))
1376
1377 extern void block_all_signals(ulwp_t *self);
1378
1379 /*
1380 * When restoring the signal mask after having previously called
1381 * block_all_signals(), if we have a deferred signal present then
1382 * do nothing other than ASSERT() that we are in a critical region.
1383 * The signal mask will be set when we emerge from the critical region
1384 * and call take_deferred_signal(). There is no race condition here
1385 * because the kernel currently has all signals blocked for this thread.
1386 */
1387 #define restore_signals(self) \
1388 ((void) ((self)->ul_cursig? \
1389 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \
1390 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask)))
1391
1392 extern void set_cancel_pending_flag(ulwp_t *, int);
1393 extern void set_cancel_eintr_flag(ulwp_t *);
1394 extern void set_parking_flag(ulwp_t *, int);
1395 extern int cancel_active(void);
1396
1397 extern void *_thrp_setup(ulwp_t *);
1398 extern void _fpinherit(ulwp_t *);
1399 extern void _lwp_start(void);
1400 extern void _lwp_terminate(void);
1401 extern void lmutex_lock(mutex_t *);
1402 extern void lmutex_unlock(mutex_t *);
1403 extern void lrw_rdlock(rwlock_t *);
1404 extern void lrw_wrlock(rwlock_t *);
1405 extern void lrw_unlock(rwlock_t *);
1406 extern void sig_mutex_lock(mutex_t *);
1407 extern void sig_mutex_unlock(mutex_t *);
1408 extern int sig_mutex_trylock(mutex_t *);
1409 extern int sig_cond_wait(cond_t *, mutex_t *);
1410 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *);
1411 extern void cancel_safe_mutex_lock(mutex_t *);
1412 extern void cancel_safe_mutex_unlock(mutex_t *);
1413 extern int cancel_safe_mutex_trylock(mutex_t *);
1414 extern void _prefork_handler(void);
1415 extern void _postfork_parent_handler(void);
1416 extern void _postfork_child_handler(void);
1417 extern void postfork1_child(void);
1418 extern void postfork1_child_aio(void);
1419 extern void postfork1_child_sigev_aio(void);
1420 extern void postfork1_child_sigev_mq(void);
1421 extern void postfork1_child_sigev_timer(void);
1422 extern void postfork1_child_tpool(void);
1423 extern void fork_lock_enter(void);
1424 extern void fork_lock_exit(void);
1425 extern void suspend_fork(void);
1426 extern void continue_fork(int);
1427 extern void do_sigcancel(void);
1428 extern void setup_cancelsig(int);
1429 extern void init_sigev_thread(void);
1430 extern void init_aio(void);
1431 extern void init_progname(void);
1432 extern void _cancelon(void);
1433 extern void _canceloff(void);
1434 extern void _canceloff_nocancel(void);
1435 extern void _cancel_prologue(void);
1436 extern void _cancel_epilogue(void);
1437 extern void no_preempt(ulwp_t *);
1438 extern void preempt(ulwp_t *);
1439 extern void _thrp_unwind(void *);
1440
1441 extern pid_t __forkx(int);
1442 extern pid_t __forkallx(int);
1443 extern int __open(const char *, int, mode_t);
1444 extern int __open64(const char *, int, mode_t);
1445 extern int __openat(int, const char *, int, mode_t);
1446 extern int __openat64(int, const char *, int, mode_t);
1447 extern int __close(int);
1448 extern ssize_t __read(int, void *, size_t);
1449 extern ssize_t __write(int, const void *, size_t);
1450 extern int __fcntl(int, int, ...);
1451 extern int __lwp_continue(lwpid_t);
1452 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *);
1453 extern int ___lwp_suspend(lwpid_t);
1454 extern int lwp_wait(lwpid_t, lwpid_t *);
1455 extern int __lwp_wait(lwpid_t, lwpid_t *);
1456 extern int __lwp_detach(lwpid_t);
1457 extern sc_shared_t *__schedctl(void);
1458
1459 /* actual system call traps */
1460 extern int __setcontext(const ucontext_t *);
1461 extern int __getcontext(ucontext_t *);
1462 extern int __clock_gettime(clockid_t, timespec_t *);
1463 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *);
1464 extern void hrt2ts(hrtime_t, timespec_t *);
1465
1466 extern int __sigaction(int, const struct sigaction *, struct sigaction *);
1467 extern int __sigprocmask(int, const sigset_t *, sigset_t *);
1468 extern int __lwp_sigmask(int, const sigset_t *);
1469 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)());
1470 extern caddr_t __sighndlrend;
1471 #pragma unknown_control_flow(__sighndlr)
1472
1473 /* belongs in <pthread.h> */
1474 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */
1475 #define PTHREAD_CREATE_NONDAEMON_NP 0
1476 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int);
1477 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *);
1478
1479 extern int mutex_held(mutex_t *);
1480 extern int mutex_lock_internal(mutex_t *, timespec_t *, int);
1481 extern int mutex_unlock_internal(mutex_t *, int);
1482
1483 /* not cancellation points: */
1484 extern int __cond_wait(cond_t *, mutex_t *);
1485 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *);
1486 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *);
1487
1488 extern int rw_read_held(rwlock_t *);
1489 extern int rw_write_held(rwlock_t *);
1490
1491 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long,
1492 thread_t *, size_t);
1493 extern int _thrp_suspend(thread_t, uchar_t);
1494 extern int _thrp_continue(thread_t, uchar_t);
1495
1496 extern void _thrp_terminate(void *);
1497 extern void _thrp_exit(void);
1498
1499 extern const pcclass_t *get_info_by_class(id_t);
1500 extern const pcclass_t *get_info_by_policy(int);
1501 extern const thrattr_t *def_thrattr(void);
1502 extern id_t setparam(idtype_t, id_t, int, int);
1503 extern id_t setprio(idtype_t, id_t, int, int *);
1504 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *);
1505
1506 /*
1507 * System call wrappers (direct interfaces to the kernel)
1508 */
1509 extern int ___lwp_mutex_register(mutex_t *, mutex_t **);
1510 extern int ___lwp_mutex_trylock(mutex_t *, ulwp_t *);
1511 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *, ulwp_t *);
1512 extern int ___lwp_mutex_unlock(mutex_t *);
1513 extern int ___lwp_mutex_wakeup(mutex_t *, int);
1514 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int);
1515 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int);
1516 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *);
1517 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *);
1518 extern int __lwp_rwlock_tryrdlock(rwlock_t *);
1519 extern int __lwp_rwlock_trywrlock(rwlock_t *);
1520 extern int __lwp_rwlock_unlock(rwlock_t *);
1521 extern int __lwp_park(timespec_t *, lwpid_t);
1522 extern int __lwp_unpark(lwpid_t);
1523 extern int __lwp_unpark_all(lwpid_t *, int);
1524 #if defined(__x86)
1525 extern int ___lwp_private(int, int, void *);
1526 #endif /* __x86 */
1527
1528 /*
1529 * inlines
1530 */
1531 extern int set_lock_byte(volatile uint8_t *);
1532 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t);
1533 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t);
1534 extern void atomic_inc_32(volatile uint32_t *);
1535 extern void atomic_dec_32(volatile uint32_t *);
1536 extern void atomic_and_32(volatile uint32_t *, uint32_t);
1537 extern void atomic_or_32(volatile uint32_t *, uint32_t);
1538 #if defined(__sparc)
1539 extern ulong_t caller(void);
1540 extern ulong_t getfp(void);
1541 #endif /* __sparc */
1542
1543 #include "thr_inlines.h"
1544
1545 #endif /* _THR_UBERDATA_H */