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OS-3820 lxbrand ptrace(2): the next generation
OS-3685 lxbrand PTRACE_O_TRACEFORK race condition
OS-3834 lxbrand 64-bit strace(1) reports 64-bit process as using x32 ABI
OS-3794 lxbrand panic on init signal death
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Bryan Cantrill <bryan@joyent.com>
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--- old/usr/src/uts/common/sys/thread.h
+++ new/usr/src/uts/common/sys/thread.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
24 24 * Use is subject to license terms.
25 25 */
26 26
27 27 #ifndef _SYS_THREAD_H
28 28 #define _SYS_THREAD_H
29 29
30 30
31 31 #include <sys/types.h>
32 32 #include <sys/t_lock.h>
33 33 #include <sys/klwp.h>
34 34 #include <sys/time.h>
35 35 #include <sys/signal.h>
36 36 #include <sys/kcpc.h>
37 37 #if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL)
38 38 #include <asm/thread.h>
39 39 #endif
40 40
41 41 #ifdef __cplusplus
42 42 extern "C" {
43 43 #endif
44 44
45 45 /*
46 46 * The thread object, its states, and the methods by which it
47 47 * is accessed.
48 48 */
49 49
50 50 /*
51 51 * Values that t_state may assume. Note that t_state cannot have more
52 52 * than one of these flags set at a time.
53 53 */
54 54 #define TS_FREE 0x00 /* Thread at loose ends */
55 55 #define TS_SLEEP 0x01 /* Awaiting an event */
56 56 #define TS_RUN 0x02 /* Runnable, but not yet on a processor */
57 57 #define TS_ONPROC 0x04 /* Thread is being run on a processor */
58 58 #define TS_ZOMB 0x08 /* Thread has died but hasn't been reaped */
59 59 #define TS_STOPPED 0x10 /* Stopped, initial state */
60 60 #define TS_WAIT 0x20 /* Waiting to become runnable */
61 61
62 62 typedef struct ctxop {
63 63 void (*save_op)(void *); /* function to invoke to save context */
64 64 void (*restore_op)(void *); /* function to invoke to restore ctx */
65 65 void (*fork_op)(void *, void *); /* invoke to fork context */
66 66 void (*lwp_create_op)(void *, void *); /* lwp_create context */
67 67 void (*exit_op)(void *); /* invoked during {thread,lwp}_exit() */
68 68 void (*free_op)(void *, int); /* function which frees the context */
69 69 void *arg; /* argument to above functions, ctx pointer */
70 70 struct ctxop *next; /* next context ops */
71 71 } ctxop_t;
72 72
73 73 /*
74 74 * The active file descriptor table.
75 75 * Each member of a_fd[] not equalling -1 represents an active fd.
76 76 * The structure is initialized on first use; all zeros means uninitialized.
77 77 */
78 78 typedef struct {
79 79 kmutex_t a_fdlock; /* protects a_fd and a_nfd */
80 80 int *a_fd; /* pointer to list of fds */
81 81 int a_nfd; /* number of entries in *a_fd */
82 82 int a_stale; /* one of the active fds is being closed */
83 83 int a_buf[2]; /* buffer to which a_fd initially refers */
84 84 } afd_t;
85 85
86 86 /*
87 87 * An lwpchan provides uniqueness when sleeping on user-level
88 88 * synchronization primitives. The lc_wchan member is used
89 89 * for sleeping on kernel synchronization primitives.
90 90 */
91 91 typedef struct {
92 92 caddr_t lc_wchan0;
93 93 caddr_t lc_wchan;
94 94 } lwpchan_t;
95 95
96 96 typedef struct _kthread *kthread_id_t;
97 97
98 98 struct turnstile;
99 99 struct panic_trap_info;
100 100 struct upimutex;
101 101 struct kproject;
102 102 struct on_trap_data;
103 103 struct waitq;
104 104 struct _kcpc_ctx;
105 105 struct _kcpc_set;
106 106
107 107 /* Definition for kernel thread identifier type */
108 108 typedef uint64_t kt_did_t;
109 109
110 110 typedef struct _kthread {
111 111 struct _kthread *t_link; /* dispq, sleepq, and free queue link */
112 112
113 113 caddr_t t_stk; /* base of stack (kernel sp value to use) */
114 114 void (*t_startpc)(void); /* PC where thread started */
115 115 struct cpu *t_bound_cpu; /* cpu bound to, or NULL if not bound */
116 116 short t_affinitycnt; /* nesting level of kernel affinity-setting */
117 117 short t_bind_cpu; /* user-specified CPU binding (-1 if none) */
118 118 ushort_t t_flag; /* modified only by current thread */
119 119 ushort_t t_proc_flag; /* modified holding ttproc(t)->p_lock */
120 120 ushort_t t_schedflag; /* modified holding thread_lock(t) */
121 121 volatile char t_preempt; /* don't preempt thread if set */
122 122 volatile char t_preempt_lk;
123 123 uint_t t_state; /* thread state (protected by thread_lock) */
124 124 pri_t t_pri; /* assigned thread priority */
125 125 pri_t t_epri; /* inherited thread priority */
126 126 pri_t t_cpri; /* thread scheduling class priority */
127 127 char t_writer; /* sleeping in lwp_rwlock_lock(RW_WRITE_LOCK) */
128 128 uchar_t t_bindflag; /* CPU and pset binding type */
129 129 label_t t_pcb; /* pcb, save area when switching */
130 130 lwpchan_t t_lwpchan; /* reason for blocking */
131 131 #define t_wchan0 t_lwpchan.lc_wchan0
132 132 #define t_wchan t_lwpchan.lc_wchan
133 133 struct _sobj_ops *t_sobj_ops;
134 134 id_t t_cid; /* scheduling class id */
135 135 struct thread_ops *t_clfuncs; /* scheduling class ops vector */
136 136 void *t_cldata; /* per scheduling class specific data */
137 137 ctxop_t *t_ctx; /* thread context */
138 138 uintptr_t t_lofault; /* ret pc for failed page faults */
139 139 label_t *t_onfault; /* on_fault() setjmp buf */
140 140 struct on_trap_data *t_ontrap; /* on_trap() protection data */
141 141 caddr_t t_swap; /* the bottom of the stack, if from segkp */
142 142 lock_t t_lock; /* used to resume() a thread */
143 143 uint8_t t_lockstat; /* set while thread is in lockstat code */
144 144 uint8_t t_pil; /* interrupt thread PIL */
145 145 disp_lock_t t_pi_lock; /* lock protecting t_prioinv list */
146 146 char t_nomigrate; /* do not migrate if set */
147 147 struct cpu *t_cpu; /* CPU that thread last ran on */
148 148 struct cpu *t_weakbound_cpu; /* cpu weakly bound to */
149 149 struct lgrp_ld *t_lpl; /* load average for home lgroup */
150 150 void *t_lgrp_reserv[2]; /* reserved for future */
151 151 struct _kthread *t_intr; /* interrupted (pinned) thread */
152 152 uint64_t t_intr_start; /* timestamp when time slice began */
153 153 kt_did_t t_did; /* thread id for kernel debuggers */
154 154 caddr_t t_tnf_tpdp; /* Trace facility data pointer */
155 155 struct _kcpc_ctx *t_cpc_ctx; /* performance counter context */
156 156 struct _kcpc_set *t_cpc_set; /* set this thread has bound */
157 157
158 158 /*
159 159 * non swappable part of the lwp state.
160 160 */
161 161 id_t t_tid; /* lwp's id */
162 162 id_t t_waitfor; /* target lwp id in lwp_wait() */
163 163 struct sigqueue *t_sigqueue; /* queue of siginfo structs */
164 164 k_sigset_t t_sig; /* signals pending to this process */
165 165 k_sigset_t t_extsig; /* signals sent from another contract */
166 166 k_sigset_t t_hold; /* hold signal bit mask */
167 167 k_sigset_t t_sigwait; /* sigtimedwait/sigfd accepting these */
168 168 struct _kthread *t_forw; /* process's forward thread link */
169 169 struct _kthread *t_back; /* process's backward thread link */
170 170 struct _kthread *t_thlink; /* tid (lwpid) lookup hash link */
171 171 klwp_t *t_lwp; /* thread's lwp pointer */
172 172 struct proc *t_procp; /* proc pointer */
173 173 struct t_audit_data *t_audit_data; /* per thread audit data */
174 174 struct _kthread *t_next; /* doubly linked list of all threads */
175 175 struct _kthread *t_prev;
176 176 ushort_t t_whystop; /* reason for stopping */
177 177 ushort_t t_whatstop; /* more detailed reason */
178 178 int t_dslot; /* index in proc's thread directory */
179 179 struct pollstate *t_pollstate; /* state used during poll(2) */
180 180 struct pollcache *t_pollcache; /* to pass a pcache ptr by /dev/poll */
181 181 struct cred *t_cred; /* pointer to current cred */
182 182 time_t t_start; /* start time, seconds since epoch */
183 183 clock_t t_lbolt; /* lbolt at last clock_tick() */
184 184 hrtime_t t_stoptime; /* timestamp at stop() */
185 185 uint_t t_pctcpu; /* %cpu at last clock_tick(), binary */
186 186 /* point at right of high-order bit */
187 187 short t_sysnum; /* system call number */
188 188 kcondvar_t t_delay_cv;
189 189 kmutex_t t_delay_lock;
190 190
191 191 /*
192 192 * Pointer to the dispatcher lock protecting t_state and state-related
193 193 * flags. This pointer can change during waits on the lock, so
194 194 * it should be grabbed only by thread_lock().
195 195 */
196 196 disp_lock_t *t_lockp; /* pointer to the dispatcher lock */
197 197 ushort_t t_oldspl; /* spl level before dispatcher locked */
198 198 volatile char t_pre_sys; /* pre-syscall work needed */
199 199 lock_t t_lock_flush; /* for lock_mutex_flush() impl */
200 200 struct _disp *t_disp_queue; /* run queue for chosen CPU */
201 201 clock_t t_disp_time; /* last time this thread was running */
202 202 uint_t t_kpri_req; /* kernel priority required */
203 203
204 204 /*
205 205 * Post-syscall / post-trap flags.
206 206 * No lock is required to set these.
207 207 * These must be cleared only by the thread itself.
208 208 *
209 209 * t_astflag indicates that some post-trap processing is required,
210 210 * possibly a signal or a preemption. The thread will not
211 211 * return to user with this set.
212 212 * t_post_sys indicates that some unusualy post-system call
213 213 * handling is required, such as an error or tracing.
214 214 * t_sig_check indicates that some condition in ISSIG() must be
215 215 * checked, but doesn't prevent returning to user.
216 216 * t_post_sys_ast is a way of checking whether any of these three
217 217 * flags are set.
218 218 */
219 219 union __tu {
220 220 struct __ts {
221 221 volatile char _t_astflag; /* AST requested */
222 222 volatile char _t_sig_check; /* ISSIG required */
223 223 volatile char _t_post_sys; /* post_syscall req */
224 224 volatile char _t_trapret; /* call CL_TRAPRET */
225 225 } _ts;
226 226 volatile int _t_post_sys_ast; /* OR of these flags */
227 227 } _tu;
228 228 #define t_astflag _tu._ts._t_astflag
229 229 #define t_sig_check _tu._ts._t_sig_check
230 230 #define t_post_sys _tu._ts._t_post_sys
231 231 #define t_trapret _tu._ts._t_trapret
232 232 #define t_post_sys_ast _tu._t_post_sys_ast
233 233
234 234 /*
235 235 * Real time microstate profiling.
236 236 */
237 237 /* possible 4-byte filler */
238 238 hrtime_t t_waitrq; /* timestamp for run queue wait time */
239 239 int t_mstate; /* current microstate */
240 240 struct rprof {
241 241 int rp_anystate; /* set if any state non-zero */
242 242 uint_t rp_state[NMSTATES]; /* mstate profiling counts */
243 243 } *t_rprof;
244 244
245 245 /*
246 246 * There is a turnstile inserted into the list below for
247 247 * every priority inverted synchronization object that
248 248 * this thread holds.
249 249 */
250 250
251 251 struct turnstile *t_prioinv;
252 252
253 253 /*
254 254 * Pointer to the turnstile attached to the synchronization
255 255 * object where this thread is blocked.
256 256 */
257 257
258 258 struct turnstile *t_ts;
259 259
260 260 /*
261 261 * kernel thread specific data
262 262 * Borrowed from userland implementation of POSIX tsd
263 263 */
264 264 struct tsd_thread {
265 265 struct tsd_thread *ts_next; /* threads with TSD */
266 266 struct tsd_thread *ts_prev; /* threads with TSD */
267 267 uint_t ts_nkeys; /* entries in value array */
268 268 void **ts_value; /* array of value/key */
269 269 } *t_tsd;
270 270
271 271 clock_t t_stime; /* time stamp used by the swapper */
272 272 struct door_data *t_door; /* door invocation data */
273 273 kmutex_t *t_plockp; /* pointer to process's p_lock */
274 274
275 275 struct sc_shared *t_schedctl; /* scheduler activations shared data */
276 276 uintptr_t t_sc_uaddr; /* user-level address of shared data */
277 277
278 278 struct cpupart *t_cpupart; /* partition containing thread */
279 279 int t_bind_pset; /* processor set binding */
280 280
281 281 struct copyops *t_copyops; /* copy in/out ops vector */
282 282
283 283 caddr_t t_stkbase; /* base of the the stack */
284 284 struct page *t_red_pp; /* if non-NULL, redzone is mapped */
285 285
286 286 afd_t t_activefd; /* active file descriptor table */
287 287
288 288 struct _kthread *t_priforw; /* sleepq per-priority sublist */
289 289 struct _kthread *t_priback;
290 290
291 291 struct sleepq *t_sleepq; /* sleep queue thread is waiting on */
292 292 struct panic_trap_info *t_panic_trap; /* saved data from fatal trap */
293 293 int *t_lgrp_affinity; /* lgroup affinity */
294 294 struct upimutex *t_upimutex; /* list of upimutexes owned by thread */
295 295 uint32_t t_nupinest; /* number of nested held upi mutexes */
296 296 struct kproject *t_proj; /* project containing this thread */
297 297 uint8_t t_unpark; /* modified holding t_delay_lock */
298 298 uint8_t t_release; /* lwp_release() waked up the thread */
299 299 uint8_t t_hatdepth; /* depth of recursive hat_memloads */
300 300 uint8_t t_xpvcntr; /* see xen_block_migrate() */
301 301 kcondvar_t t_joincv; /* cv used to wait for thread exit */
302 302 void *t_taskq; /* for threads belonging to taskq */
303 303 hrtime_t t_anttime; /* most recent time anticipatory load */
304 304 /* was added to an lgroup's load */
305 305 /* on this thread's behalf */
306 306 char *t_pdmsg; /* privilege debugging message */
307 307
308 308 uint_t t_predcache; /* DTrace predicate cache */
309 309 hrtime_t t_dtrace_vtime; /* DTrace virtual time */
310 310 hrtime_t t_dtrace_start; /* DTrace slice start time */
311 311
312 312 uint8_t t_dtrace_stop; /* indicates a DTrace-desired stop */
313 313 uint8_t t_dtrace_sig; /* signal sent via DTrace's raise() */
314 314
315 315 union __tdu {
316 316 struct __tds {
317 317 uint8_t _t_dtrace_on; /* hit a fasttrap tracepoint */
318 318 uint8_t _t_dtrace_step; /* about to return to kernel */
319 319 uint8_t _t_dtrace_ret; /* handling a return probe */
320 320 uint8_t _t_dtrace_ast; /* saved ast flag */
321 321 #ifdef __amd64
322 322 uint8_t _t_dtrace_reg; /* modified register */
323 323 #endif
324 324 } _tds;
325 325 ulong_t _t_dtrace_ft; /* bitwise or of these flags */
326 326 } _tdu;
327 327 #define t_dtrace_ft _tdu._t_dtrace_ft
328 328 #define t_dtrace_on _tdu._tds._t_dtrace_on
329 329 #define t_dtrace_step _tdu._tds._t_dtrace_step
330 330 #define t_dtrace_ret _tdu._tds._t_dtrace_ret
331 331 #define t_dtrace_ast _tdu._tds._t_dtrace_ast
332 332 #ifdef __amd64
333 333 #define t_dtrace_reg _tdu._tds._t_dtrace_reg
334 334 #endif
335 335
336 336 uintptr_t t_dtrace_pc; /* DTrace saved pc from fasttrap */
337 337 uintptr_t t_dtrace_npc; /* DTrace next pc from fasttrap */
338 338 uintptr_t t_dtrace_scrpc; /* DTrace per-thread scratch location */
339 339 uintptr_t t_dtrace_astpc; /* DTrace return sequence location */
340 340 #ifdef __amd64
341 341 uint64_t t_dtrace_regv; /* DTrace saved reg from fasttrap */
342 342 uint64_t t_useracc; /* SMAP state saved across swtch() */
343 343 #endif
344 344 hrtime_t t_hrtime; /* high-res last time on cpu */
345 345 kmutex_t t_ctx_lock; /* protects t_ctx in removectx() */
346 346 struct waitq *t_waitq; /* wait queue */
347 347 kmutex_t t_wait_mutex; /* used in CV wait functions */
348 348 } kthread_t;
349 349
350 350 /*
351 351 * Thread flag (t_flag) definitions.
352 352 * These flags must be changed only for the current thread,
353 353 * and not during preemption code, since the code being
354 354 * preempted could be modifying the flags.
355 355 *
356 356 * For the most part these flags do not need locking.
357 357 * The following flags will only be changed while the thread_lock is held,
358 358 * to give assurrance that they are consistent with t_state:
359 359 * T_WAKEABLE
360 360 */
361 361 #define T_INTR_THREAD 0x0001 /* thread is an interrupt thread */
362 362 #define T_WAKEABLE 0x0002 /* thread is blocked, signals enabled */
363 363 #define T_TOMASK 0x0004 /* use lwp_sigoldmask on return from signal */
364 364 #define T_TALLOCSTK 0x0008 /* thread structure allocated from stk */
365 365 #define T_FORKALL 0x0010 /* thread was cloned by forkall() */
366 366 #define T_WOULDBLOCK 0x0020 /* for lockfs */
367 367 #define T_DONTBLOCK 0x0040 /* for lockfs */
368 368 #define T_DONTPEND 0x0080 /* for lockfs */
369 369 #define T_SYS_PROF 0x0100 /* profiling on for duration of system call */
370 370 #define T_WAITCVSEM 0x0200 /* waiting for a lwp_cv or lwp_sema on sleepq */
371 371 #define T_WATCHPT 0x0400 /* thread undergoing a watchpoint emulation */
372 372 #define T_PANIC 0x0800 /* thread initiated a system panic */
373 373 #define T_LWPREUSE 0x1000 /* stack and LWP can be reused */
374 374 #define T_CAPTURING 0x2000 /* thread is in page capture logic */
375 375 #define T_VFPARENT 0x4000 /* thread is vfork parent, must call vfwait */
376 376 #define T_DONTDTRACE 0x8000 /* disable DTrace probes */
377 377
378 378 /*
379 379 * Flags in t_proc_flag.
380 380 * These flags must be modified only when holding the p_lock
381 381 * for the associated process.
382 382 */
383 383 #define TP_DAEMON 0x0001 /* this is an LWP_DAEMON lwp */
384 384 #define TP_HOLDLWP 0x0002 /* hold thread's lwp */
385 385 #define TP_TWAIT 0x0004 /* wait to be freed by lwp_wait() */
386 386 #define TP_LWPEXIT 0x0008 /* lwp has exited */
387 387 #define TP_PRSTOP 0x0010 /* thread is being stopped via /proc */
388 388 #define TP_CHKPT 0x0020 /* thread is being stopped via CPR checkpoint */
389 389 #define TP_EXITLWP 0x0040 /* terminate this lwp */
390 390 #define TP_PRVSTOP 0x0080 /* thread is virtually stopped via /proc */
391 391 #define TP_MSACCT 0x0100 /* collect micro-state accounting information */
392 392 #define TP_STOPPING 0x0200 /* thread is executing stop() */
393 393 #define TP_WATCHPT 0x0400 /* process has watchpoints in effect */
394 394 #define TP_PAUSE 0x0800 /* process is being stopped via pauselwps() */
395 395 #define TP_CHANGEBIND 0x1000 /* thread has a new cpu/cpupart binding */
396 396 #define TP_ZTHREAD 0x2000 /* this is a kernel thread for a zone */
397 397 #define TP_WATCHSTOP 0x4000 /* thread is stopping via holdwatch() */
398 398
399 399 /*
400 400 * Thread scheduler flag (t_schedflag) definitions.
401 401 * The thread must be locked via thread_lock() or equiv. to change these.
402 402 */
403 403 #define TS_LOAD 0x0001 /* thread is in memory */
404 404 #define TS_DONT_SWAP 0x0002 /* thread/lwp should not be swapped */
405 405 #define TS_SWAPENQ 0x0004 /* swap thread when it reaches a safe point */
406 406 #define TS_ON_SWAPQ 0x0008 /* thread is on the swap queue */
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407 407 #define TS_SIGNALLED 0x0010 /* thread was awakened by cv_signal() */
408 408 #define TS_PROJWAITQ 0x0020 /* thread is on its project's waitq */
409 409 #define TS_ZONEWAITQ 0x0040 /* thread is on its zone's waitq */
410 410 #define TS_CSTART 0x0100 /* setrun() by continuelwps() */
411 411 #define TS_UNPAUSE 0x0200 /* setrun() by unpauselwps() */
412 412 #define TS_XSTART 0x0400 /* setrun() by SIGCONT */
413 413 #define TS_PSTART 0x0800 /* setrun() by /proc */
414 414 #define TS_RESUME 0x1000 /* setrun() by CPR resume process */
415 415 #define TS_CREATE 0x2000 /* setrun() by syslwp_create() */
416 416 #define TS_RUNQMATCH 0x4000 /* exact run queue balancing by setbackdq() */
417 +#define TS_BSTART 0x8000 /* setrun() by brand */
417 418 #define TS_ALLSTART \
418 - (TS_CSTART|TS_UNPAUSE|TS_XSTART|TS_PSTART|TS_RESUME|TS_CREATE)
419 + (TS_CSTART|TS_UNPAUSE|TS_XSTART|TS_PSTART|TS_RESUME|TS_CREATE|TS_BSTART)
419 420 #define TS_ANYWAITQ (TS_PROJWAITQ|TS_ZONEWAITQ)
420 421
421 422 /*
422 423 * Thread binding types
423 424 */
424 425 #define TB_ALLHARD 0
425 426 #define TB_CPU_SOFT 0x01 /* soft binding to CPU */
426 427 #define TB_PSET_SOFT 0x02 /* soft binding to pset */
427 428
428 429 #define TB_CPU_SOFT_SET(t) ((t)->t_bindflag |= TB_CPU_SOFT)
429 430 #define TB_CPU_HARD_SET(t) ((t)->t_bindflag &= ~TB_CPU_SOFT)
430 431 #define TB_PSET_SOFT_SET(t) ((t)->t_bindflag |= TB_PSET_SOFT)
431 432 #define TB_PSET_HARD_SET(t) ((t)->t_bindflag &= ~TB_PSET_SOFT)
432 433 #define TB_CPU_IS_SOFT(t) ((t)->t_bindflag & TB_CPU_SOFT)
433 434 #define TB_CPU_IS_HARD(t) (!TB_CPU_IS_SOFT(t))
434 435 #define TB_PSET_IS_SOFT(t) ((t)->t_bindflag & TB_PSET_SOFT)
435 436
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436 437 /*
437 438 * No locking needed for AST field.
438 439 */
439 440 #define aston(t) ((t)->t_astflag = 1)
440 441 #define astoff(t) ((t)->t_astflag = 0)
441 442
442 443 /* True if thread is stopped on an event of interest */
443 444 #define ISTOPPED(t) ((t)->t_state == TS_STOPPED && \
444 445 !((t)->t_schedflag & TS_PSTART))
445 446
447 +/* True if thread is stopped for a brand-specific reason */
448 +#define BSTOPPED(t) ((t)->t_state == TS_STOPPED && \
449 + !((t)->t_schedflag & TS_BSTART))
450 +
446 451 /* True if thread is asleep and wakeable */
447 452 #define ISWAKEABLE(t) (((t)->t_state == TS_SLEEP && \
448 453 ((t)->t_flag & T_WAKEABLE)))
449 454
450 455 /* True if thread is on the wait queue */
451 456 #define ISWAITING(t) ((t)->t_state == TS_WAIT)
452 457
453 458 /* similar to ISTOPPED except the event of interest is CPR */
454 459 #define CPR_ISTOPPED(t) ((t)->t_state == TS_STOPPED && \
455 460 !((t)->t_schedflag & TS_RESUME))
456 461
457 462 /*
458 463 * True if thread is virtually stopped (is or was asleep in
459 464 * one of the lwp_*() system calls and marked to stop by /proc.)
460 465 */
461 466 #define VSTOPPED(t) ((t)->t_proc_flag & TP_PRVSTOP)
462 467
463 468 /* similar to VSTOPPED except the point of interest is CPR */
464 469 #define CPR_VSTOPPED(t) \
465 470 ((t)->t_state == TS_SLEEP && \
466 471 (t)->t_wchan0 != NULL && \
467 472 ((t)->t_flag & T_WAKEABLE) && \
468 473 ((t)->t_proc_flag & TP_CHKPT))
469 474
470 475 /* True if thread has been stopped by hold*() or was created stopped */
471 476 #define SUSPENDED(t) ((t)->t_state == TS_STOPPED && \
472 477 ((t)->t_schedflag & (TS_CSTART|TS_UNPAUSE)) != (TS_CSTART|TS_UNPAUSE))
473 478
474 479 /* True if thread possesses an inherited priority */
475 480 #define INHERITED(t) ((t)->t_epri != 0)
476 481
477 482 /* The dispatch priority of a thread */
478 483 #define DISP_PRIO(t) ((t)->t_epri > (t)->t_pri ? (t)->t_epri : (t)->t_pri)
479 484
480 485 /* The assigned priority of a thread */
481 486 #define ASSIGNED_PRIO(t) ((t)->t_pri)
482 487
483 488 /*
484 489 * Macros to determine whether a thread can be swapped.
485 490 * If t_lock is held, the thread is either on a processor or being swapped.
486 491 */
487 492 #define SWAP_OK(t) (!LOCK_HELD(&(t)->t_lock))
488 493
489 494 /*
490 495 * proctot(x)
491 496 * convert a proc pointer to a thread pointer. this only works with
492 497 * procs that have only one lwp.
493 498 *
494 499 * proctolwp(x)
495 500 * convert a proc pointer to a lwp pointer. this only works with
496 501 * procs that have only one lwp.
497 502 *
498 503 * ttolwp(x)
499 504 * convert a thread pointer to its lwp pointer.
500 505 *
501 506 * ttoproc(x)
502 507 * convert a thread pointer to its proc pointer.
503 508 *
504 509 * ttoproj(x)
505 510 * convert a thread pointer to its project pointer.
506 511 *
507 512 * ttozone(x)
508 513 * convert a thread pointer to its zone pointer.
509 514 *
510 515 * lwptot(x)
511 516 * convert a lwp pointer to its thread pointer.
512 517 *
513 518 * lwptoproc(x)
514 519 * convert a lwp to its proc pointer.
515 520 */
516 521 #define proctot(x) ((x)->p_tlist)
517 522 #define proctolwp(x) ((x)->p_tlist->t_lwp)
518 523 #define ttolwp(x) ((x)->t_lwp)
519 524 #define ttoproc(x) ((x)->t_procp)
520 525 #define ttoproj(x) ((x)->t_proj)
521 526 #define ttozone(x) ((x)->t_procp->p_zone)
522 527 #define lwptot(x) ((x)->lwp_thread)
523 528 #define lwptoproc(x) ((x)->lwp_procp)
524 529
525 530 #define t_pc t_pcb.val[0]
526 531 #define t_sp t_pcb.val[1]
527 532
528 533 #ifdef _KERNEL
529 534
530 535 extern kthread_t *threadp(void); /* inline, returns thread pointer */
531 536 #define curthread (threadp()) /* current thread pointer */
532 537 #define curproc (ttoproc(curthread)) /* current process pointer */
533 538 #define curproj (ttoproj(curthread)) /* current project pointer */
534 539 #define curzone (curproc->p_zone) /* current zone pointer */
535 540
536 541 extern struct _kthread t0; /* the scheduler thread */
537 542 extern kmutex_t pidlock; /* global process lock */
538 543
539 544 /*
540 545 * thread_free_lock is used by the tick accounting thread to keep a thread
541 546 * from being freed while it is being examined.
542 547 *
543 548 * Thread structures are 32-byte aligned structures. That is why we use the
544 549 * following formula.
545 550 */
546 551 #define THREAD_FREE_BITS 10
547 552 #define THREAD_FREE_NUM (1 << THREAD_FREE_BITS)
548 553 #define THREAD_FREE_MASK (THREAD_FREE_NUM - 1)
549 554 #define THREAD_FREE_1 PTR24_LSB
550 555 #define THREAD_FREE_2 (PTR24_LSB + THREAD_FREE_BITS)
551 556 #define THREAD_FREE_SHIFT(t) \
552 557 (((ulong_t)(t) >> THREAD_FREE_1) ^ ((ulong_t)(t) >> THREAD_FREE_2))
553 558 #define THREAD_FREE_HASH(t) (THREAD_FREE_SHIFT(t) & THREAD_FREE_MASK)
554 559
555 560 typedef struct thread_free_lock {
556 561 kmutex_t tf_lock;
557 562 uchar_t tf_pad[64 - sizeof (kmutex_t)];
558 563 } thread_free_lock_t;
559 564
560 565 extern void thread_free_prevent(kthread_t *);
561 566 extern void thread_free_allow(kthread_t *);
562 567
563 568 /*
564 569 * Routines to change the priority and effective priority
565 570 * of a thread-locked thread, whatever its state.
566 571 */
567 572 extern int thread_change_pri(kthread_t *t, pri_t disp_pri, int front);
568 573 extern void thread_change_epri(kthread_t *t, pri_t disp_pri);
569 574
570 575 /*
571 576 * Routines that manipulate the dispatcher lock for the thread.
572 577 * The locking heirarchy is as follows:
573 578 * cpu_lock > sleepq locks > run queue locks
574 579 */
575 580 void thread_transition(kthread_t *); /* move to transition lock */
576 581 void thread_stop(kthread_t *); /* move to stop lock */
577 582 void thread_lock(kthread_t *); /* lock thread and its queue */
578 583 void thread_lock_high(kthread_t *); /* lock thread and its queue */
579 584 void thread_onproc(kthread_t *, struct cpu *); /* set onproc state lock */
580 585
581 586 #define thread_unlock(t) disp_lock_exit((t)->t_lockp)
582 587 #define thread_unlock_high(t) disp_lock_exit_high((t)->t_lockp)
583 588 #define thread_unlock_nopreempt(t) disp_lock_exit_nopreempt((t)->t_lockp)
584 589
585 590 #define THREAD_LOCK_HELD(t) (DISP_LOCK_HELD((t)->t_lockp))
586 591
587 592 extern disp_lock_t transition_lock; /* lock protecting transiting threads */
588 593 extern disp_lock_t stop_lock; /* lock protecting stopped threads */
589 594
590 595 caddr_t thread_stk_init(caddr_t); /* init thread stack */
591 596
592 597 extern int default_binding_mode;
593 598
594 599 #endif /* _KERNEL */
595 600
596 601 /*
597 602 * Macros to indicate that the thread holds resources that could be critical
598 603 * to other kernel threads, so this thread needs to have kernel priority
599 604 * if it blocks or is preempted. Note that this is not necessary if the
600 605 * resource is a mutex or a writer lock because of priority inheritance.
601 606 *
602 607 * The only way one thread may legally manipulate another thread's t_kpri_req
603 608 * is to hold the target thread's thread lock while that thread is asleep.
604 609 * (The rwlock code does this to implement direct handoff to waiting readers.)
605 610 */
606 611 #define THREAD_KPRI_REQUEST() (curthread->t_kpri_req++)
607 612 #define THREAD_KPRI_RELEASE() (curthread->t_kpri_req--)
608 613 #define THREAD_KPRI_RELEASE_N(n) (curthread->t_kpri_req -= (n))
609 614
610 615 /*
611 616 * Macro to change a thread's priority.
612 617 */
613 618 #define THREAD_CHANGE_PRI(t, pri) { \
614 619 pri_t __new_pri = (pri); \
615 620 DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, __new_pri); \
616 621 (t)->t_pri = __new_pri; \
617 622 schedctl_set_cidpri(t); \
618 623 }
619 624
620 625 /*
621 626 * Macro to indicate that a thread's priority is about to be changed.
622 627 */
623 628 #define THREAD_WILLCHANGE_PRI(t, pri) { \
624 629 DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, (pri)); \
625 630 }
626 631
627 632 /*
628 633 * Macros to change thread state and the associated lock.
629 634 */
630 635 #define THREAD_SET_STATE(tp, state, lp) \
631 636 ((tp)->t_state = state, (tp)->t_lockp = lp)
632 637
633 638 /*
634 639 * Point it at the transition lock, which is always held.
635 640 * The previosly held lock is dropped.
636 641 */
637 642 #define THREAD_TRANSITION(tp) thread_transition(tp);
638 643 /*
639 644 * Set the thread's lock to be the transition lock, without dropping
640 645 * previosly held lock.
641 646 */
642 647 #define THREAD_TRANSITION_NOLOCK(tp) ((tp)->t_lockp = &transition_lock)
643 648
644 649 /*
645 650 * Put thread in run state, and set the lock pointer to the dispatcher queue
646 651 * lock pointer provided. This lock should be held.
647 652 */
648 653 #define THREAD_RUN(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp)
649 654
650 655 /*
651 656 * Put thread in wait state, and set the lock pointer to the wait queue
652 657 * lock pointer provided. This lock should be held.
653 658 */
654 659 #define THREAD_WAIT(tp, lp) THREAD_SET_STATE(tp, TS_WAIT, lp)
655 660
656 661 /*
657 662 * Put thread in run state, and set the lock pointer to the dispatcher queue
658 663 * lock pointer provided (i.e., the "swapped_lock"). This lock should be held.
659 664 */
660 665 #define THREAD_SWAP(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp)
661 666
662 667 /*
663 668 * Put the thread in zombie state and set the lock pointer to NULL.
664 669 * The NULL will catch anything that tries to lock a zombie.
665 670 */
666 671 #define THREAD_ZOMB(tp) THREAD_SET_STATE(tp, TS_ZOMB, NULL)
667 672
668 673 /*
669 674 * Set the thread into ONPROC state, and point the lock at the CPUs
670 675 * lock for the onproc thread(s). This lock should be held, so the
671 676 * thread deoes not become unlocked, since these stores can be reordered.
672 677 */
673 678 #define THREAD_ONPROC(tp, cpu) \
674 679 THREAD_SET_STATE(tp, TS_ONPROC, &(cpu)->cpu_thread_lock)
675 680
676 681 /*
677 682 * Set the thread into the TS_SLEEP state, and set the lock pointer to
678 683 * to some sleep queue's lock. The new lock should already be held.
679 684 */
680 685 #define THREAD_SLEEP(tp, lp) { \
681 686 disp_lock_t *tlp; \
682 687 tlp = (tp)->t_lockp; \
683 688 THREAD_SET_STATE(tp, TS_SLEEP, lp); \
684 689 disp_lock_exit_high(tlp); \
685 690 }
686 691
687 692 /*
688 693 * Interrupt threads are created in TS_FREE state, and their lock
689 694 * points at the associated CPU's lock.
690 695 */
691 696 #define THREAD_FREEINTR(tp, cpu) \
692 697 THREAD_SET_STATE(tp, TS_FREE, &(cpu)->cpu_thread_lock)
693 698
694 699 /* if tunable kmem_stackinfo is set, fill kthread stack with a pattern */
695 700 #define KMEM_STKINFO_PATTERN 0xbadcbadcbadcbadcULL
696 701
697 702 /*
698 703 * If tunable kmem_stackinfo is set, log the latest KMEM_LOG_STK_USAGE_SIZE
699 704 * dead kthreads that used their kernel stack the most.
700 705 */
701 706 #define KMEM_STKINFO_LOG_SIZE 16
702 707
703 708 /* kthread name (cmd/lwpid) string size in the stackinfo log */
704 709 #define KMEM_STKINFO_STR_SIZE 64
705 710
706 711 /*
707 712 * stackinfo logged data.
708 713 */
709 714 typedef struct kmem_stkinfo {
710 715 caddr_t kthread; /* kthread pointer */
711 716 caddr_t t_startpc; /* where kthread started */
712 717 caddr_t start; /* kthread stack start address */
713 718 size_t stksz; /* kthread stack size */
714 719 size_t percent; /* kthread stack high water mark */
715 720 id_t t_tid; /* kthread id */
716 721 char cmd[KMEM_STKINFO_STR_SIZE]; /* kthread name (cmd/lwpid) */
717 722 } kmem_stkinfo_t;
718 723
719 724 #ifdef __cplusplus
720 725 }
721 726 #endif
722 727
723 728 #endif /* _SYS_THREAD_H */
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