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 void *arg; /* argument to handler */
841 void *dso; /* DSO associated with handler */
842 } _exthdlr_t;
843
844 typedef struct {
845 mutex_t exitfns_lock;
846 _exthdlr_t *head;
847 /*
848 * exit_frame_monitor is part of a private contract between libc and
849 * the Sun C++ runtime.
850 *
851 * It should be NULL until exit() is called, and thereafter hold the
852 * frame pointer of the function implementing our exit processing.
853 */
854 void *exit_frame_monitor;
855 char exit_pad[64 - /* pad out to 64 bytes */
856 (sizeof (mutex_t) + sizeof (_exthdlr_t *) + sizeof (void *))];
857 } atexit_root_t;
858
859 #ifdef _SYSCALL32
860 typedef struct {
861 mutex_t exitfns_lock;
862 caddr32_t head;
863 caddr32_t exit_frame_monitor;
864 char exit_pad[64 - /* pad out to 64 bytes */
865 (sizeof (mutex_t) + sizeof (caddr32_t) + sizeof (caddr32_t))];
866 } atexit_root32_t;
867 #endif /* _SYSCALL32 */
868
869
870 /*
871 * This is data that is global to all link maps (uberdata, aka super-global).
872 * Note: When changing this, please be sure to keep the 32-bit variant of
873 * this in sync. (see uberdata32_t below)
874 */
875 typedef struct uberdata {
876 pad_lock_t _link_lock;
877 pad_lock_t _ld_lock;
878 pad_lock_t _fork_lock;
879 pad_lock_t _atfork_lock;
880 pad32_lock_t _callout_lock;
881 pad32_lock_t _tdb_hash_lock;
882 tdb_sync_stats_t tdb_hash_lock_stats;
883 siguaction_t siguaction[NSIG];
884 bucket_t bucket[NBUCKETS];
885 atexit_root_t atexit_root;
886 tsd_metadata_t tsd_metadata;
887 tls_metadata_t tls_metadata;
888 /*
889 * Every object before this point has size and alignment of 64 bytes.
890 * Don't add any other type of data before this point.
891 */
892 char primary_map; /* set when primary link map is initialized */
893 char bucket_init; /* set when bucket[NBUCKETS] is initialized */
894 char pad[2];
895 uberflags_t uberflags;
896 queue_head_t *queue_head;
897 thr_hash_table_t *thr_hash_table;
898 uint_t hash_size; /* # of entries in thr_hash_table[] */
899 uint_t hash_mask; /* hash_size - 1 */
900 ulwp_t *ulwp_one; /* main thread */
901 ulwp_t *all_lwps; /* circular ul_forw/ul_back list of live lwps */
902 ulwp_t *all_zombies; /* circular ul_forw/ul_back list of zombies */
903 int nthreads; /* total number of live threads/lwps */
904 int nzombies; /* total number of zombie threads */
905 int ndaemons; /* total number of THR_DAEMON threads/lwps */
906 pid_t pid; /* the current process's pid */
907 void (*sigacthandler)(int, siginfo_t *, void *);
908 ulwp_t *lwp_stacks;
909 ulwp_t *lwp_laststack;
910 int nfreestack;
911 int thread_stack_cache;
912 ulwp_t *ulwp_freelist;
913 ulwp_t *ulwp_lastfree;
914 ulwp_t *ulwp_replace_free;
915 ulwp_t *ulwp_replace_last;
916 atfork_t *atforklist; /* circular Q for fork handlers */
917 robust_t **robustlocks; /* table of registered robust locks */
918 robust_t *robustlist; /* list of registered robust locks */
919 char *progname; /* the basename of the program, from argv[0] */
920 struct uberdata **tdb_bootstrap;
921 tdb_t tdb; /* thread debug interfaces (for libc_db) */
922 } uberdata_t;
923
924 #define link_lock _link_lock.pad_lock
925 #define ld_lock _ld_lock.pad_lock
926 #define fork_lock _fork_lock.pad_lock
927 #define atfork_lock _atfork_lock.pad_lock
928 #define callout_lock _callout_lock.pad_lock
929 #define tdb_hash_lock _tdb_hash_lock.pad_lock
930
931 #pragma align 64(__uberdata)
932 extern uberdata_t __uberdata;
933 extern uberdata_t **__tdb_bootstrap; /* known to libc_db and mdb */
934 extern int primary_link_map;
935
936 #define ulwp_mutex(ulwp, udp) \
937 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_lock)
938 #define ulwp_condvar(ulwp, udp) \
939 (&(udp)->thr_hash_table[(ulwp)->ul_ix].hash_cond)
940
941 /*
942 * Grab and release the hash table lock for the specified lwp.
943 */
944 #define ulwp_lock(ulwp, udp) lmutex_lock(ulwp_mutex(ulwp, udp))
945 #define ulwp_unlock(ulwp, udp) lmutex_unlock(ulwp_mutex(ulwp, udp))
946
947 #ifdef _SYSCALL32 /* needed by libc_db */
948
949 typedef struct ulwp32 {
950 #if defined(__sparc)
951 uint32_t ul_dinstr; /* scratch space for dtrace */
952 uint32_t ul_padsparc0[15];
953 uint32_t ul_dsave; /* dtrace: save %g1, %g0, %sp */
954 uint32_t ul_drestore; /* dtrace: restore %g0, %g0, %g0 */
955 uint32_t ul_dftret; /* dtrace: return probe fasttrap */
956 uint32_t ul_dreturn; /* dtrace: return %o0 */
957 #endif
958 caddr32_t ul_self; /* pointer to self */
959 #if defined(__x86)
960 uint8_t ul_dinstr[40]; /* scratch space for dtrace */
961 #endif
962 caddr32_t ul_uberdata; /* uber (super-global) data */
963 tls32_t ul_tls; /* dynamic thread-local storage base */
964 caddr32_t ul_forw; /* forw, back all_lwps list, */
965 caddr32_t ul_back; /* protected by link_lock */
966 caddr32_t ul_next; /* list to keep track of stacks */
967 caddr32_t ul_hash; /* hash chain linked list */
968 caddr32_t ul_rval; /* return value from thr_exit() */
969 caddr32_t ul_stk; /* mapping base of the stack */
970 size32_t ul_mapsiz; /* mapping size of the stack */
971 size32_t ul_guardsize; /* normally _lpagesize */
972 caddr32_t ul_stktop; /* broken thr_stksegment() interface */
973 size32_t ul_stksiz; /* broken thr_stksegment() interface */
974 stack32_t ul_ustack; /* current stack boundaries */
975 int ul_ix; /* hash index */
976 lwpid_t ul_lwpid; /* thread id, aka the lwp id */
977 pri_t ul_pri; /* scheduling priority */
978 pri_t ul_epri; /* real-time ceiling priority */
979 char ul_policy; /* scheduling policy */
980 char ul_cid; /* scheduling class id */
981 union {
982 struct {
983 char cursig; /* deferred signal number */
984 char pleasestop; /* lwp requested to stop itself */
985 } s;
986 short curplease; /* for testing both at once */
987 } ul_cp;
988 char ul_stop; /* reason for stopping */
989 char ul_signalled; /* this lwp was cond_signal()d */
990 char ul_dead; /* this lwp has called thr_exit */
991 char ul_unwind; /* posix: unwind C++ stack */
992 char ul_detached; /* THR_DETACHED at thread_create() */
993 /* or pthread_detach() was called */
994 char ul_writer; /* sleeping in rw_wrlock() */
995 char ul_stopping; /* set by curthread: stopping self */
996 char ul_cancel_prologue; /* for _cancel_prologue() */
997 short ul_preempt; /* no_preempt()/preempt() */
998 short ul_savpreempt; /* pre-existing preempt value */
999 char ul_sigsuspend; /* thread is in sigsuspend/pollsys */
1000 char ul_main; /* thread is the main thread */
1001 char ul_fork; /* thread is performing a fork */
1002 char ul_primarymap; /* primary link-map is initialized */
1003 /* per-thread copies of the corresponding global variables */
1004 uint8_t ul_max_spinners; /* thread_max_spinners */
1005 char ul_door_noreserve; /* thread_door_noreserve */
1006 char ul_queue_fifo; /* thread_queue_fifo */
1007 char ul_cond_wait_defer; /* thread_cond_wait_defer */
1008 char ul_error_detection; /* thread_error_detection */
1009 char ul_async_safe; /* thread_async_safe */
1010 char ul_rt; /* found on an RT queue */
1011 char ul_rtqueued; /* was RT when queued */
1012 char ul_misaligned; /* thread_locks_misaligned */
1013 char ul_pad[3];
1014 int ul_adaptive_spin; /* thread_adaptive_spin */
1015 int ul_queue_spin; /* thread_queue_spin */
1016 int ul_critical; /* non-zero == in a critical region */
1017 int ul_sigdefer; /* non-zero == defer signals */
1018 int ul_vfork; /* thread is the child of vfork() */
1019 int ul_cancelable; /* _cancelon()/_canceloff() */
1020 char ul_cancel_pending; /* pthread_cancel() was called */
1021 char ul_cancel_disabled; /* PTHREAD_CANCEL_DISABLE */
1022 char ul_cancel_async; /* PTHREAD_CANCEL_ASYNCHRONOUS */
1023 char ul_save_async; /* saved copy of ul_cancel_async */
1024 char ul_mutator; /* lwp is a mutator (java interface) */
1025 char ul_created; /* created suspended */
1026 char ul_replace; /* replacement; must be free()d */
1027 uchar_t ul_nocancel; /* cancellation can't happen */
1028 int ul_errno; /* per-thread errno */
1029 caddr32_t ul_errnop; /* pointer to errno or self->ul_errno */
1030 caddr32_t ul_clnup_hdr; /* head of cleanup handlers list */
1031 caddr32_t ul_schedctl_called; /* ul_schedctl is set up */
1032 caddr32_t ul_schedctl; /* schedctl data */
1033 int ul_bindflags; /* bind_guard() interface to ld.so.1 */
1034 uint_t ul_libc_locks; /* count of cancel_safe_mutex_lock()s */
1035 caddr32_t ul_stsd; /* slow TLS for keys >= TSD_NFAST */
1036 caddr32_t ul_ftsd[TSD_NFAST]; /* fast TLS for keys < TSD_NFAST */
1037 td_evbuf32_t ul_td_evbuf; /* event buffer */
1038 char ul_td_events_enable; /* event mechanism enabled */
1039 char ul_sync_obj_reg; /* tdb_sync_obj_register() */
1040 char ul_qtype; /* MX or CV */
1041 char ul_cv_wake; /* != 0: just wake up, don't requeue */
1042 int ul_rtld; /* thread is running inside ld.so.1 */
1043 int ul_usropts; /* flags given to thr_create() */
1044 caddr32_t ul_startpc; /* start func (thr_create()) */
1045 caddr32_t ul_startarg; /* argument for start function */
1046 caddr32_t ul_wchan; /* synch object when sleeping */
1047 caddr32_t ul_link; /* sleep queue link */
1048 caddr32_t ul_sleepq; /* sleep queue thread is waiting on */
1049 caddr32_t ul_cvmutex; /* mutex dropped when waiting on a cv */
1050 caddr32_t ul_mxchain; /* chain of owned ceiling mutexes */
1051 int ul_save_state; /* bind_guard() interface to ld.so.1 */
1052 uint_t ul_rdlockcnt; /* # entries in ul_readlock array */
1053 /* 0 means there is but a single entry */
1054 union { /* single entry or pointer to array */
1055 readlock32_t single;
1056 caddr32_t array;
1057 } ul_readlock;
1058 uint_t ul_heldlockcnt; /* # entries in ul_heldlocks array */
1059 /* 0 means there is but a single entry */
1060 union { /* single entry or pointer to array */
1061 caddr32_t single;
1062 caddr32_t array;
1063 } ul_heldlocks;
1064 /* PROBE_SUPPORT begin */
1065 caddr32_t ul_tpdp;
1066 /* PROBE_SUPPORT end */
1067 caddr32_t ul_siglink; /* pointer to previous context */
1068 uint_t ul_spin_lock_spin; /* spin lock statistics */
1069 uint_t ul_spin_lock_spin2;
1070 uint_t ul_spin_lock_sleep;
1071 uint_t ul_spin_lock_wakeup;
1072 queue_root32_t ul_queue_root; /* root of a sleep queue */
1073 id_t ul_rtclassid; /* real-time class id */
1074 uint_t ul_pilocks; /* count of PI locks held */
1075 /* the following members *must* be last in the structure */
1076 /* they are discarded when ulwp is replaced on thr_exit() */
1077 sigset_t ul_sigmask; /* thread's current signal mask */
1078 sigset_t ul_tmpmask; /* signal mask for sigsuspend/pollsys */
1079 siginfo32_t ul_siginfo; /* deferred siginfo */
1080 mutex_t ul_spinlock; /* used when suspending/continuing */
1081 fpuenv32_t ul_fpuenv; /* floating point state */
1082 caddr32_t ul_sp; /* stack pointer when blocked */
1083 #if defined(sparc)
1084 caddr32_t ul_unwind_ret; /* used only by _ex_clnup_handler() */
1085 #endif
1086 } ulwp32_t;
1087
1088 #define REPLACEMENT_SIZE32 ((size_t)&((ulwp32_t *)NULL)->ul_sigmask)
1089
1090 typedef struct uberdata32 {
1091 pad_lock_t _link_lock;
1092 pad_lock_t _ld_lock;
1093 pad_lock_t _fork_lock;
1094 pad_lock_t _atfork_lock;
1095 pad32_lock_t _callout_lock;
1096 pad32_lock_t _tdb_hash_lock;
1097 tdb_sync_stats_t tdb_hash_lock_stats;
1098 siguaction32_t siguaction[NSIG];
1099 bucket32_t bucket[NBUCKETS];
1100 atexit_root32_t atexit_root;
1101 tsd_metadata32_t tsd_metadata;
1102 tls_metadata32_t tls_metadata;
1103 char primary_map;
1104 char bucket_init;
1105 char pad[2];
1106 uberflags_t uberflags;
1107 caddr32_t queue_head;
1108 caddr32_t thr_hash_table;
1109 uint_t hash_size;
1110 uint_t hash_mask;
1111 caddr32_t ulwp_one;
1112 caddr32_t all_lwps;
1113 caddr32_t all_zombies;
1114 int nthreads;
1115 int nzombies;
1116 int ndaemons;
1117 int pid;
1118 caddr32_t sigacthandler;
1119 caddr32_t lwp_stacks;
1120 caddr32_t lwp_laststack;
1121 int nfreestack;
1122 int thread_stack_cache;
1123 caddr32_t ulwp_freelist;
1124 caddr32_t ulwp_lastfree;
1125 caddr32_t ulwp_replace_free;
1126 caddr32_t ulwp_replace_last;
1127 caddr32_t atforklist;
1128 caddr32_t robustlocks;
1129 caddr32_t robustlist;
1130 caddr32_t progname;
1131 caddr32_t tdb_bootstrap;
1132 tdb32_t tdb;
1133 } uberdata32_t;
1134
1135 #endif /* _SYSCALL32 */
1136
1137 /* ul_stop values */
1138 #define TSTP_REGULAR 0x01 /* Stopped by thr_suspend() */
1139 #define TSTP_MUTATOR 0x08 /* stopped by thr_suspend_*mutator*() */
1140 #define TSTP_FORK 0x20 /* stopped by suspend_fork() */
1141
1142 /*
1143 * Implementation-specific attribute types for pthread_mutexattr_init() etc.
1144 */
1145
1146 typedef struct _cvattr {
1147 int pshared;
1148 clockid_t clockid;
1149 } cvattr_t;
1150
1151 typedef struct _mattr {
1152 int pshared;
1153 int protocol;
1154 int prioceiling;
1155 int type;
1156 int robustness;
1157 } mattr_t;
1158
1159 typedef struct _thrattr {
1160 size_t stksize;
1161 void *stkaddr;
1162 int detachstate;
1163 int daemonstate;
1164 int scope;
1165 int prio;
1166 int policy;
1167 int inherit;
1168 size_t guardsize;
1169 } thrattr_t;
1170
1171 typedef struct _rwlattr {
1172 int pshared;
1173 } rwlattr_t;
1174
1175 /* _curthread() is inline for speed */
1176 extern ulwp_t *_curthread(void);
1177 #define curthread (_curthread())
1178
1179 /* this version (also inline) can be tested for NULL */
1180 extern ulwp_t *__curthread(void);
1181
1182 /* get the current stack pointer (also inline) */
1183 extern greg_t stkptr(void);
1184
1185 /*
1186 * Suppress __attribute__((...)) if we are not compiling with gcc
1187 */
1188 #if !defined(__GNUC__)
1189 #define __attribute__(string)
1190 #endif
1191
1192 /* Fetch the dispatch (kernel) priority of a thread */
1193 #define real_priority(ulwp) \
1194 ((ulwp)->ul_schedctl? (ulwp)->ul_schedctl->sc_priority : 0)
1195
1196 /*
1197 * Implementation functions. Not visible outside of the library itself.
1198 */
1199 extern int __nanosleep(const timespec_t *, timespec_t *);
1200 extern void getgregs(ulwp_t *, gregset_t);
1201 extern void setgregs(ulwp_t *, gregset_t);
1202 extern void thr_panic(const char *);
1203 #pragma rarely_called(thr_panic)
1204 extern ulwp_t *find_lwp(thread_t);
1205 extern void finish_init(void);
1206 extern void update_sched(ulwp_t *);
1207 extern void queue_alloc(void);
1208 extern void tsd_exit(void);
1209 extern void tsd_free(ulwp_t *);
1210 extern void tls_setup(void);
1211 extern void tls_exit(void);
1212 extern void tls_free(ulwp_t *);
1213 extern void rwl_free(ulwp_t *);
1214 extern void heldlock_exit(void);
1215 extern void heldlock_free(ulwp_t *);
1216 extern void sigacthandler(int, siginfo_t *, void *);
1217 extern void signal_init(void);
1218 extern int sigequalset(const sigset_t *, const sigset_t *);
1219 extern void mutex_setup(void);
1220 extern void take_deferred_signal(int);
1221 extern void *setup_top_frame(void *, size_t, ulwp_t *);
1222 extern int setup_context(ucontext_t *, void *(*func)(ulwp_t *),
1223 ulwp_t *ulwp, caddr_t stk, size_t stksize);
1224 extern volatile sc_shared_t *setup_schedctl(void);
1225 extern void *lmalloc(size_t);
1226 extern void lfree(void *, size_t);
1227 extern void *libc_malloc(size_t);
1228 extern void *libc_realloc(void *, size_t);
1229 extern void libc_free(void *);
1230 extern char *libc_strdup(const char *);
1231 extern void ultos(uint64_t, int, char *);
1232 extern void lock_error(const mutex_t *, const char *, void *, const char *);
1233 extern void rwlock_error(const rwlock_t *, const char *, const char *);
1234 extern void thread_error(const char *);
1235 extern void grab_assert_lock(void);
1236 extern void dump_queue_statistics(void);
1237 extern void collect_queue_statistics(void);
1238 extern void record_spin_locks(ulwp_t *);
1239 extern void remember_lock(mutex_t *);
1240 extern void forget_lock(mutex_t *);
1241 extern void register_lock(mutex_t *);
1242 extern void unregister_locks(void);
1243 #if defined(__sparc)
1244 extern void _flush_windows(void);
1245 #else
1246 #define _flush_windows()
1247 #endif
1248 extern void set_curthread(void *);
1249
1250 /*
1251 * Utility function used when waking up many threads (more than MAXLWPS)
1252 * all at once. See mutex_wakeup_all(), cond_broadcast(), and rw_unlock().
1253 */
1254 #define MAXLWPS 128 /* max remembered lwpids before overflow */
1255 #define NEWLWPS 2048 /* max remembered lwpids at first overflow */
1256 extern lwpid_t *alloc_lwpids(lwpid_t *, int *, int *);
1257
1258 /* enter a critical section */
1259 #define enter_critical(self) (self->ul_critical++)
1260
1261 /* exit a critical section, take deferred actions if necessary */
1262 extern void do_exit_critical(void);
1263 #define exit_critical(self) \
1264 (void) (self->ul_critical--, \
1265 ((self->ul_curplease && self->ul_critical == 0)? \
1266 (do_exit_critical(), 0) : 0))
1267
1268 /*
1269 * Like enter_critical()/exit_critical() but just for deferring signals.
1270 * Unlike enter_critical()/exit_critical(), ul_sigdefer may be set while
1271 * calling application functions like constructors and destructors.
1272 * Care must be taken if the application function attempts to set
1273 * the signal mask while a deferred signal is present; the setting
1274 * of the signal mask must also be deferred.
1275 */
1276 #define sigoff(self) (self->ul_sigdefer++)
1277 #define sigon(self) \
1278 (void) ((--self->ul_sigdefer == 0 && \
1279 self->ul_curplease && self->ul_critical == 0)? \
1280 (do_exit_critical(), 0) : 0)
1281
1282 /* these are exported functions */
1283 extern void _sigoff(void);
1284 extern void _sigon(void);
1285
1286 #define sigorset(s1, s2) \
1287 (((s1)->__sigbits[0] |= (s2)->__sigbits[0]), \
1288 ((s1)->__sigbits[1] |= (s2)->__sigbits[1]), \
1289 ((s1)->__sigbits[2] |= (s2)->__sigbits[2]), \
1290 ((s1)->__sigbits[3] |= (s2)->__sigbits[3]))
1291
1292 #define sigandset(s1, s2) \
1293 (((s1)->__sigbits[0] &= (s2)->__sigbits[0]), \
1294 ((s1)->__sigbits[1] &= (s2)->__sigbits[1]), \
1295 ((s1)->__sigbits[2] &= (s2)->__sigbits[2]), \
1296 ((s1)->__sigbits[3] &= (s2)->__sigbits[3]))
1297
1298 #define sigdiffset(s1, s2) \
1299 (((s1)->__sigbits[0] &= ~(s2)->__sigbits[0]), \
1300 ((s1)->__sigbits[1] &= ~(s2)->__sigbits[1]), \
1301 ((s1)->__sigbits[2] &= ~(s2)->__sigbits[2]), \
1302 ((s1)->__sigbits[3] &= ~(s2)->__sigbits[3]))
1303
1304 #define delete_reserved_signals(s) \
1305 (((s)->__sigbits[0] &= MASKSET0), \
1306 ((s)->__sigbits[1] &= (MASKSET1 & ~SIGMASK(SIGCANCEL))),\
1307 ((s)->__sigbits[2] &= MASKSET2), \
1308 ((s)->__sigbits[3] &= MASKSET3))
1309
1310 extern void block_all_signals(ulwp_t *self);
1311
1312 /*
1313 * When restoring the signal mask after having previously called
1314 * block_all_signals(), if we have a deferred signal present then
1315 * do nothing other than ASSERT() that we are in a critical region.
1316 * The signal mask will be set when we emerge from the critical region
1317 * and call take_deferred_signal(). There is no race condition here
1318 * because the kernel currently has all signals blocked for this thread.
1319 */
1320 #define restore_signals(self) \
1321 ((void) ((self)->ul_cursig? \
1322 (ASSERT((self)->ul_critical + (self)->ul_sigdefer != 0), 0) : \
1323 __lwp_sigmask(SIG_SETMASK, &(self)->ul_sigmask)))
1324
1325 extern void set_cancel_pending_flag(ulwp_t *, int);
1326 extern void set_cancel_eintr_flag(ulwp_t *);
1327 extern void set_parking_flag(ulwp_t *, int);
1328 extern int cancel_active(void);
1329
1330 extern void *_thrp_setup(ulwp_t *);
1331 extern void _fpinherit(ulwp_t *);
1332 extern void _lwp_start(void);
1333 extern void _lwp_terminate(void);
1334 extern void lmutex_lock(mutex_t *);
1335 extern void lmutex_unlock(mutex_t *);
1336 extern void lrw_rdlock(rwlock_t *);
1337 extern void lrw_wrlock(rwlock_t *);
1338 extern void lrw_unlock(rwlock_t *);
1339 extern void sig_mutex_lock(mutex_t *);
1340 extern void sig_mutex_unlock(mutex_t *);
1341 extern int sig_mutex_trylock(mutex_t *);
1342 extern int sig_cond_wait(cond_t *, mutex_t *);
1343 extern int sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *);
1344 extern void cancel_safe_mutex_lock(mutex_t *);
1345 extern void cancel_safe_mutex_unlock(mutex_t *);
1346 extern int cancel_safe_mutex_trylock(mutex_t *);
1347 extern void _prefork_handler(void);
1348 extern void _postfork_parent_handler(void);
1349 extern void _postfork_child_handler(void);
1350 extern void postfork1_child(void);
1351 extern void postfork1_child_aio(void);
1352 extern void postfork1_child_sigev_aio(void);
1353 extern void postfork1_child_sigev_mq(void);
1354 extern void postfork1_child_sigev_timer(void);
1355 extern void postfork1_child_tpool(void);
1356 extern void fork_lock_enter(void);
1357 extern void fork_lock_exit(void);
1358 extern void suspend_fork(void);
1359 extern void continue_fork(int);
1360 extern void do_sigcancel(void);
1361 extern void setup_cancelsig(int);
1362 extern void init_sigev_thread(void);
1363 extern void init_aio(void);
1364 extern void init_progname(void);
1365 extern void _cancelon(void);
1366 extern void _canceloff(void);
1367 extern void _canceloff_nocancel(void);
1368 extern void _cancel_prologue(void);
1369 extern void _cancel_epilogue(void);
1370 extern void no_preempt(ulwp_t *);
1371 extern void preempt(ulwp_t *);
1372 extern void _thrp_unwind(void *);
1373
1374 extern pid_t __forkx(int);
1375 extern pid_t __forkallx(int);
1376 extern int __open(const char *, int, mode_t);
1377 extern int __open64(const char *, int, mode_t);
1378 extern int __openat(int, const char *, int, mode_t);
1379 extern int __openat64(int, const char *, int, mode_t);
1380 extern int __close(int);
1381 extern ssize_t __read(int, void *, size_t);
1382 extern ssize_t __write(int, const void *, size_t);
1383 extern int __fcntl(int, int, ...);
1384 extern int __lwp_continue(lwpid_t);
1385 extern int __lwp_create(ucontext_t *, uint_t, lwpid_t *);
1386 extern int ___lwp_suspend(lwpid_t);
1387 extern int lwp_wait(lwpid_t, lwpid_t *);
1388 extern int __lwp_wait(lwpid_t, lwpid_t *);
1389 extern int __lwp_detach(lwpid_t);
1390 extern sc_shared_t *__schedctl(void);
1391
1392 /* actual system call traps */
1393 extern int __setcontext(const ucontext_t *);
1394 extern int __getcontext(ucontext_t *);
1395 extern int __clock_gettime(clockid_t, timespec_t *);
1396 extern void abstime_to_reltime(clockid_t, const timespec_t *, timespec_t *);
1397 extern void hrt2ts(hrtime_t, timespec_t *);
1398
1399 extern int __sigaction(int, const struct sigaction *, struct sigaction *);
1400 extern int __sigprocmask(int, const sigset_t *, sigset_t *);
1401 extern int __lwp_sigmask(int, const sigset_t *);
1402 extern void __sighndlr(int, siginfo_t *, ucontext_t *, void (*)());
1403 extern caddr_t __sighndlrend;
1404 #pragma unknown_control_flow(__sighndlr)
1405
1406 /* belongs in <pthread.h> */
1407 #define PTHREAD_CREATE_DAEMON_NP 0x100 /* = THR_DAEMON */
1408 #define PTHREAD_CREATE_NONDAEMON_NP 0
1409 extern int pthread_attr_setdaemonstate_np(pthread_attr_t *, int);
1410 extern int pthread_attr_getdaemonstate_np(const pthread_attr_t *, int *);
1411
1412 extern int mutex_held(mutex_t *);
1413 extern int mutex_lock_internal(mutex_t *, timespec_t *, int);
1414 extern int mutex_unlock_internal(mutex_t *, int);
1415
1416 /* not cancellation points: */
1417 extern int __cond_wait(cond_t *, mutex_t *);
1418 extern int __cond_timedwait(cond_t *, mutex_t *, const timespec_t *);
1419 extern int __cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *);
1420
1421 extern int rw_read_held(rwlock_t *);
1422 extern int rw_write_held(rwlock_t *);
1423
1424 extern int _thrp_create(void *, size_t, void *(*)(void *), void *, long,
1425 thread_t *, size_t);
1426 extern int _thrp_suspend(thread_t, uchar_t);
1427 extern int _thrp_continue(thread_t, uchar_t);
1428
1429 extern void _thrp_terminate(void *);
1430 extern void _thrp_exit(void);
1431
1432 extern const pcclass_t *get_info_by_class(id_t);
1433 extern const pcclass_t *get_info_by_policy(int);
1434 extern const thrattr_t *def_thrattr(void);
1435 extern id_t setparam(idtype_t, id_t, int, int);
1436 extern id_t setprio(idtype_t, id_t, int, int *);
1437 extern id_t getparam(idtype_t, id_t, int *, struct sched_param *);
1438
1439 /*
1440 * System call wrappers (direct interfaces to the kernel)
1441 */
1442 extern int ___lwp_mutex_register(mutex_t *, mutex_t **);
1443 extern int ___lwp_mutex_trylock(mutex_t *, ulwp_t *);
1444 extern int ___lwp_mutex_timedlock(mutex_t *, timespec_t *, ulwp_t *);
1445 extern int ___lwp_mutex_unlock(mutex_t *);
1446 extern int ___lwp_mutex_wakeup(mutex_t *, int);
1447 extern int ___lwp_cond_wait(cond_t *, mutex_t *, timespec_t *, int);
1448 extern int ___lwp_sema_timedwait(lwp_sema_t *, timespec_t *, int);
1449 extern int __lwp_rwlock_rdlock(rwlock_t *, timespec_t *);
1450 extern int __lwp_rwlock_wrlock(rwlock_t *, timespec_t *);
1451 extern int __lwp_rwlock_tryrdlock(rwlock_t *);
1452 extern int __lwp_rwlock_trywrlock(rwlock_t *);
1453 extern int __lwp_rwlock_unlock(rwlock_t *);
1454 extern int __lwp_park(timespec_t *, lwpid_t);
1455 extern int __lwp_unpark(lwpid_t);
1456 extern int __lwp_unpark_all(lwpid_t *, int);
1457 #if defined(__x86)
1458 extern int ___lwp_private(int, int, void *);
1459 #endif /* __x86 */
1460
1461 /*
1462 * inlines
1463 */
1464 extern int set_lock_byte(volatile uint8_t *);
1465 extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t);
1466 extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t);
1467 extern void atomic_inc_32(volatile uint32_t *);
1468 extern void atomic_dec_32(volatile uint32_t *);
1469 extern void atomic_and_32(volatile uint32_t *, uint32_t);
1470 extern void atomic_or_32(volatile uint32_t *, uint32_t);
1471 #if defined(__sparc)
1472 extern ulong_t caller(void);
1473 extern ulong_t getfp(void);
1474 #endif /* __sparc */
1475
1476 #include "thr_inlines.h"
1477
1478 #endif /* _THR_UBERDATA_H */