1 0 stevel /* 2 0 stevel * CDDL HEADER START 3 0 stevel * 4 0 stevel * The contents of this file are subject to the terms of the 5 2646 trevtom * Common Development and Distribution License (the "License"). 6 2646 trevtom * You may not use this file except in compliance with the License. 7 0 stevel * 8 0 stevel * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 0 stevel * or http://www.opensolaris.org/os/licensing. 10 0 stevel * See the License for the specific language governing permissions 11 0 stevel * and limitations under the License. 12 0 stevel * 13 0 stevel * When distributing Covered Code, include this CDDL HEADER in each 14 0 stevel * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 0 stevel * If applicable, add the following below this CDDL HEADER, with the 16 0 stevel * fields enclosed by brackets "[]" replaced with your own identifying 17 0 stevel * information: Portions Copyright [yyyy] [name of copyright owner] 18 0 stevel * 19 0 stevel * CDDL HEADER END 20 0 stevel */ 21 3828 raf 22 0 stevel /* 23 8566 Madhavan * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 0 stevel * Use is subject to license terms. 25 0 stevel */ 26 0 stevel 27 0 stevel #ifndef _SYS_THREAD_H 28 0 stevel #define _SYS_THREAD_H 29 0 stevel 30 0 stevel 31 0 stevel #include <sys/types.h> 32 0 stevel #include <sys/t_lock.h> 33 0 stevel #include <sys/klwp.h> 34 0 stevel #include <sys/time.h> 35 0 stevel #include <sys/signal.h> 36 0 stevel #include <sys/kcpc.h> 37 0 stevel #if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL) 38 0 stevel #include <asm/thread.h> 39 0 stevel #endif 40 0 stevel 41 0 stevel #ifdef __cplusplus 42 0 stevel extern "C" { 43 0 stevel #endif 44 0 stevel 45 0 stevel /* 46 0 stevel * The thread object, its states, and the methods by which it 47 0 stevel * is accessed. 48 0 stevel */ 49 0 stevel 50 0 stevel /* 51 0 stevel * Values that t_state may assume. Note that t_state cannot have more 52 0 stevel * than one of these flags set at a time. 53 0 stevel */ 54 0 stevel #define TS_FREE 0x00 /* Thread at loose ends */ 55 0 stevel #define TS_SLEEP 0x01 /* Awaiting an event */ 56 0 stevel #define TS_RUN 0x02 /* Runnable, but not yet on a processor */ 57 0 stevel #define TS_ONPROC 0x04 /* Thread is being run on a processor */ 58 0 stevel #define TS_ZOMB 0x08 /* Thread has died but hasn't been reaped */ 59 0 stevel #define TS_STOPPED 0x10 /* Stopped, initial state */ 60 3792 akolb #define TS_WAIT 0x20 /* Waiting to become runnable */ 61 0 stevel 62 0 stevel typedef struct ctxop { 63 0 stevel void (*save_op)(void *); /* function to invoke to save context */ 64 0 stevel void (*restore_op)(void *); /* function to invoke to restore ctx */ 65 0 stevel void (*fork_op)(void *, void *); /* invoke to fork context */ 66 0 stevel void (*lwp_create_op)(void *, void *); /* lwp_create context */ 67 0 stevel void (*exit_op)(void *); /* invoked during {thread,lwp}_exit() */ 68 0 stevel void (*free_op)(void *, int); /* function which frees the context */ 69 0 stevel void *arg; /* argument to above functions, ctx pointer */ 70 0 stevel struct ctxop *next; /* next context ops */ 71 0 stevel } ctxop_t; 72 0 stevel 73 0 stevel /* 74 0 stevel * The active file descriptor table. 75 0 stevel * Each member of a_fd[] not equalling -1 represents an active fd. 76 0 stevel * The structure is initialized on first use; all zeros means uninitialized. 77 0 stevel */ 78 10470 Roger typedef struct { 79 10470 Roger kmutex_t a_fdlock; /* protects a_fd and a_nfd */ 80 0 stevel int *a_fd; /* pointer to list of fds */ 81 10470 Roger int a_nfd; /* number of entries in *a_fd */ 82 10470 Roger int a_stale; /* one of the active fds is being closed */ 83 10470 Roger int a_buf[2]; /* buffer to which a_fd initially refers */ 84 0 stevel } afd_t; 85 0 stevel 86 0 stevel /* 87 0 stevel * An lwpchan provides uniqueness when sleeping on user-level 88 0 stevel * synchronization primitives. The lc_wchan member is used 89 0 stevel * for sleeping on kernel synchronization primitives. 90 0 stevel */ 91 0 stevel typedef struct { 92 0 stevel caddr_t lc_wchan0; 93 0 stevel caddr_t lc_wchan; 94 0 stevel } lwpchan_t; 95 0 stevel 96 0 stevel typedef struct _kthread *kthread_id_t; 97 0 stevel 98 0 stevel struct turnstile; 99 5084 johnlev struct panic_trap_info; 100 0 stevel struct upimutex; 101 0 stevel struct kproject; 102 0 stevel struct on_trap_data; 103 3792 akolb struct waitq; 104 6275 trevtom struct _kcpc_ctx; 105 6275 trevtom struct _kcpc_set; 106 0 stevel 107 0 stevel /* Definition for kernel thread identifier type */ 108 0 stevel typedef uint64_t kt_did_t; 109 0 stevel 110 0 stevel typedef struct _kthread { 111 0 stevel struct _kthread *t_link; /* dispq, sleepq, and free queue link */ 112 0 stevel 113 0 stevel caddr_t t_stk; /* base of stack (kernel sp value to use) */ 114 0 stevel void (*t_startpc)(void); /* PC where thread started */ 115 0 stevel struct cpu *t_bound_cpu; /* cpu bound to, or NULL if not bound */ 116 0 stevel short t_affinitycnt; /* nesting level of kernel affinity-setting */ 117 0 stevel short t_bind_cpu; /* user-specified CPU binding (-1 if none) */ 118 0 stevel ushort_t t_flag; /* modified only by current thread */ 119 0 stevel ushort_t t_proc_flag; /* modified holding ttproc(t)->p_lock */ 120 0 stevel ushort_t t_schedflag; /* modified holding thread_lock(t) */ 121 0 stevel volatile char t_preempt; /* don't preempt thread if set */ 122 0 stevel volatile char t_preempt_lk; 123 0 stevel uint_t t_state; /* thread state (protected by thread_lock) */ 124 0 stevel pri_t t_pri; /* assigned thread priority */ 125 0 stevel pri_t t_epri; /* inherited thread priority */ 126 6247 raf pri_t t_cpri; /* thread scheduling class priority */ 127 0 stevel char t_writer; /* sleeping in lwp_rwlock_lock(RW_WRITE_LOCK) */ 128 6298 akolb uchar_t t_bindflag; /* CPU and pset binding type */ 129 0 stevel label_t t_pcb; /* pcb, save area when switching */ 130 0 stevel lwpchan_t t_lwpchan; /* reason for blocking */ 131 0 stevel #define t_wchan0 t_lwpchan.lc_wchan0 132 0 stevel #define t_wchan t_lwpchan.lc_wchan 133 0 stevel struct _sobj_ops *t_sobj_ops; 134 0 stevel id_t t_cid; /* scheduling class id */ 135 0 stevel struct thread_ops *t_clfuncs; /* scheduling class ops vector */ 136 0 stevel void *t_cldata; /* per scheduling class specific data */ 137 0 stevel ctxop_t *t_ctx; /* thread context */ 138 0 stevel uintptr_t t_lofault; /* ret pc for failed page faults */ 139 0 stevel label_t *t_onfault; /* on_fault() setjmp buf */ 140 0 stevel struct on_trap_data *t_ontrap; /* on_trap() protection data */ 141 0 stevel caddr_t t_swap; /* swappable thread storage */ 142 0 stevel lock_t t_lock; /* used to resume() a thread */ 143 0 stevel uint8_t t_lockstat; /* set while thread is in lockstat code */ 144 0 stevel uint8_t t_pil; /* interrupt thread PIL */ 145 0 stevel disp_lock_t t_pi_lock; /* lock protecting t_prioinv list */ 146 0 stevel char t_nomigrate; /* do not migrate if set */ 147 0 stevel struct cpu *t_cpu; /* CPU that thread last ran on */ 148 0 stevel struct cpu *t_weakbound_cpu; /* cpu weakly bound to */ 149 0 stevel struct lgrp_ld *t_lpl; /* load average for home lgroup */ 150 0 stevel void *t_lgrp_reserv[2]; /* reserved for future */ 151 0 stevel struct _kthread *t_intr; /* interrupted (pinned) thread */ 152 0 stevel uint64_t t_intr_start; /* timestamp when time slice began */ 153 0 stevel kt_did_t t_did; /* thread id for kernel debuggers */ 154 0 stevel caddr_t t_tnf_tpdp; /* Trace facility data pointer */ 155 6275 trevtom struct _kcpc_ctx *t_cpc_ctx; /* performance counter context */ 156 6275 trevtom struct _kcpc_set *t_cpc_set; /* set this thread has bound */ 157 0 stevel 158 0 stevel /* 159 0 stevel * non swappable part of the lwp state. 160 0 stevel */ 161 0 stevel id_t t_tid; /* lwp's id */ 162 0 stevel id_t t_waitfor; /* target lwp id in lwp_wait() */ 163 0 stevel struct sigqueue *t_sigqueue; /* queue of siginfo structs */ 164 0 stevel k_sigset_t t_sig; /* signals pending to this process */ 165 0 stevel k_sigset_t t_extsig; /* signals sent from another contract */ 166 0 stevel k_sigset_t t_hold; /* hold signal bit mask */ 167 9385 Roger k_sigset_t t_sigwait; /* sigtimedwait() is accepting these */ 168 0 stevel struct _kthread *t_forw; /* process's forward thread link */ 169 0 stevel struct _kthread *t_back; /* process's backward thread link */ 170 0 stevel struct _kthread *t_thlink; /* tid (lwpid) lookup hash link */ 171 0 stevel klwp_t *t_lwp; /* thread's lwp pointer */ 172 0 stevel struct proc *t_procp; /* proc pointer */ 173 0 stevel struct t_audit_data *t_audit_data; /* per thread audit data */ 174 0 stevel struct _kthread *t_next; /* doubly linked list of all threads */ 175 0 stevel struct _kthread *t_prev; 176 0 stevel ushort_t t_whystop; /* reason for stopping */ 177 0 stevel ushort_t t_whatstop; /* more detailed reason */ 178 0 stevel int t_dslot; /* index in proc's thread directory */ 179 0 stevel struct pollstate *t_pollstate; /* state used during poll(2) */ 180 0 stevel struct pollcache *t_pollcache; /* to pass a pcache ptr by /dev/poll */ 181 0 stevel struct cred *t_cred; /* pointer to current cred */ 182 0 stevel time_t t_start; /* start time, seconds since epoch */ 183 0 stevel clock_t t_lbolt; /* lbolt at last clock_tick() */ 184 0 stevel hrtime_t t_stoptime; /* timestamp at stop() */ 185 0 stevel uint_t t_pctcpu; /* %cpu at last clock_tick(), binary */ 186 0 stevel /* point at right of high-order bit */ 187 0 stevel short t_sysnum; /* system call number */ 188 0 stevel kcondvar_t t_delay_cv; 189 0 stevel kmutex_t t_delay_lock; 190 0 stevel 191 0 stevel /* 192 0 stevel * Pointer to the dispatcher lock protecting t_state and state-related 193 0 stevel * flags. This pointer can change during waits on the lock, so 194 0 stevel * it should be grabbed only by thread_lock(). 195 0 stevel */ 196 0 stevel disp_lock_t *t_lockp; /* pointer to the dispatcher lock */ 197 0 stevel ushort_t t_oldspl; /* spl level before dispatcher locked */ 198 0 stevel volatile char t_pre_sys; /* pre-syscall work needed */ 199 0 stevel lock_t t_lock_flush; /* for lock_mutex_flush() impl */ 200 0 stevel struct _disp *t_disp_queue; /* run queue for chosen CPU */ 201 0 stevel clock_t t_disp_time; /* last time this thread was running */ 202 0 stevel uint_t t_kpri_req; /* kernel priority required */ 203 0 stevel 204 0 stevel /* 205 0 stevel * Post-syscall / post-trap flags. 206 0 stevel * No lock is required to set these. 207 0 stevel * These must be cleared only by the thread itself. 208 0 stevel * 209 0 stevel * t_astflag indicates that some post-trap processing is required, 210 0 stevel * possibly a signal or a preemption. The thread will not 211 0 stevel * return to user with this set. 212 0 stevel * t_post_sys indicates that some unusualy post-system call 213 0 stevel * handling is required, such as an error or tracing. 214 0 stevel * t_sig_check indicates that some condition in ISSIG() must be 215 0 stevel * checked, but doesn't prevent returning to user. 216 0 stevel * t_post_sys_ast is a way of checking whether any of these three 217 0 stevel * flags are set. 218 0 stevel */ 219 0 stevel union __tu { 220 0 stevel struct __ts { 221 0 stevel volatile char _t_astflag; /* AST requested */ 222 0 stevel volatile char _t_sig_check; /* ISSIG required */ 223 0 stevel volatile char _t_post_sys; /* post_syscall req */ 224 0 stevel volatile char _t_trapret; /* call CL_TRAPRET */ 225 0 stevel } _ts; 226 0 stevel volatile int _t_post_sys_ast; /* OR of these flags */ 227 0 stevel } _tu; 228 0 stevel #define t_astflag _tu._ts._t_astflag 229 0 stevel #define t_sig_check _tu._ts._t_sig_check 230 0 stevel #define t_post_sys _tu._ts._t_post_sys 231 0 stevel #define t_trapret _tu._ts._t_trapret 232 0 stevel #define t_post_sys_ast _tu._t_post_sys_ast 233 0 stevel 234 0 stevel /* 235 0 stevel * Real time microstate profiling. 236 0 stevel */ 237 0 stevel /* possible 4-byte filler */ 238 0 stevel hrtime_t t_waitrq; /* timestamp for run queue wait time */ 239 0 stevel int t_mstate; /* current microstate */ 240 0 stevel struct rprof { 241 0 stevel int rp_anystate; /* set if any state non-zero */ 242 0 stevel uint_t rp_state[NMSTATES]; /* mstate profiling counts */ 243 0 stevel } *t_rprof; 244 0 stevel 245 0 stevel /* 246 0 stevel * There is a turnstile inserted into the list below for 247 0 stevel * every priority inverted synchronization object that 248 0 stevel * this thread holds. 249 0 stevel */ 250 0 stevel 251 0 stevel struct turnstile *t_prioinv; 252 0 stevel 253 0 stevel /* 254 0 stevel * Pointer to the turnstile attached to the synchronization 255 0 stevel * object where this thread is blocked. 256 0 stevel */ 257 0 stevel 258 0 stevel struct turnstile *t_ts; 259 0 stevel 260 0 stevel /* 261 0 stevel * kernel thread specific data 262 0 stevel * Borrowed from userland implementation of POSIX tsd 263 0 stevel */ 264 0 stevel struct tsd_thread { 265 0 stevel struct tsd_thread *ts_next; /* threads with TSD */ 266 0 stevel struct tsd_thread *ts_prev; /* threads with TSD */ 267 0 stevel uint_t ts_nkeys; /* entries in value array */ 268 0 stevel void **ts_value; /* array of value/key */ 269 0 stevel } *t_tsd; 270 0 stevel 271 0 stevel clock_t t_stime; /* time stamp used by the swapper */ 272 0 stevel struct door_data *t_door; /* door invocation data */ 273 0 stevel kmutex_t *t_plockp; /* pointer to process's p_lock */ 274 0 stevel 275 0 stevel struct sc_shared *t_schedctl; /* scheduler activations shared data */ 276 0 stevel uintptr_t t_sc_uaddr; /* user-level address of shared data */ 277 0 stevel 278 0 stevel struct cpupart *t_cpupart; /* partition containing thread */ 279 0 stevel int t_bind_pset; /* processor set binding */ 280 0 stevel 281 0 stevel struct copyops *t_copyops; /* copy in/out ops vector */ 282 0 stevel 283 0 stevel caddr_t t_stkbase; /* base of the the stack */ 284 0 stevel struct page *t_red_pp; /* if non-NULL, redzone is mapped */ 285 0 stevel 286 10470 Roger afd_t t_activefd; /* active file descriptor table */ 287 0 stevel 288 0 stevel struct _kthread *t_priforw; /* sleepq per-priority sublist */ 289 0 stevel struct _kthread *t_priback; 290 0 stevel 291 0 stevel struct sleepq *t_sleepq; /* sleep queue thread is waiting on */ 292 5084 johnlev struct panic_trap_info *t_panic_trap; /* saved data from fatal trap */ 293 0 stevel int *t_lgrp_affinity; /* lgroup affinity */ 294 0 stevel struct upimutex *t_upimutex; /* list of upimutexes owned by thread */ 295 0 stevel uint32_t t_nupinest; /* number of nested held upi mutexes */ 296 0 stevel struct kproject *t_proj; /* project containing this thread */ 297 0 stevel uint8_t t_unpark; /* modified holding t_delay_lock */ 298 0 stevel uint8_t t_release; /* lwp_release() waked up the thread */ 299 0 stevel uint8_t t_hatdepth; /* depth of recursive hat_memloads */ 300 5741 mrj uint8_t t_xpvcntr; /* see xen_block_migrate() */ 301 0 stevel kcondvar_t t_joincv; /* cv used to wait for thread exit */ 302 0 stevel void *t_taskq; /* for threads belonging to taskq */ 303 0 stevel hrtime_t t_anttime; /* most recent time anticipatory load */ 304 0 stevel /* was added to an lgroup's load */ 305 0 stevel /* on this thread's behalf */ 306 0 stevel char *t_pdmsg; /* privilege debugging message */ 307 0 stevel 308 0 stevel uint_t t_predcache; /* DTrace predicate cache */ 309 0 stevel hrtime_t t_dtrace_vtime; /* DTrace virtual time */ 310 0 stevel hrtime_t t_dtrace_start; /* DTrace slice start time */ 311 0 stevel 312 0 stevel uint8_t t_dtrace_stop; /* indicates a DTrace-desired stop */ 313 0 stevel uint8_t t_dtrace_sig; /* signal sent via DTrace's raise() */ 314 0 stevel 315 0 stevel union __tdu { 316 0 stevel struct __tds { 317 0 stevel uint8_t _t_dtrace_on; /* hit a fasttrap tracepoint */ 318 0 stevel uint8_t _t_dtrace_step; /* about to return to kernel */ 319 0 stevel uint8_t _t_dtrace_ret; /* handling a return probe */ 320 0 stevel uint8_t _t_dtrace_ast; /* saved ast flag */ 321 0 stevel #ifdef __amd64 322 0 stevel uint8_t _t_dtrace_reg; /* modified register */ 323 0 stevel #endif 324 0 stevel } _tds; 325 0 stevel ulong_t _t_dtrace_ft; /* bitwise or of these flags */ 326 0 stevel } _tdu; 327 0 stevel #define t_dtrace_ft _tdu._t_dtrace_ft 328 0 stevel #define t_dtrace_on _tdu._tds._t_dtrace_on 329 0 stevel #define t_dtrace_step _tdu._tds._t_dtrace_step 330 0 stevel #define t_dtrace_ret _tdu._tds._t_dtrace_ret 331 0 stevel #define t_dtrace_ast _tdu._tds._t_dtrace_ast 332 0 stevel #ifdef __amd64 333 0 stevel #define t_dtrace_reg _tdu._tds._t_dtrace_reg 334 0 stevel #endif 335 0 stevel 336 0 stevel uintptr_t t_dtrace_pc; /* DTrace saved pc from fasttrap */ 337 0 stevel uintptr_t t_dtrace_npc; /* DTrace next pc from fasttrap */ 338 0 stevel uintptr_t t_dtrace_scrpc; /* DTrace per-thread scratch location */ 339 0 stevel uintptr_t t_dtrace_astpc; /* DTrace return sequence location */ 340 0 stevel #ifdef __amd64 341 0 stevel uint64_t t_dtrace_regv; /* DTrace saved reg from fasttrap */ 342 0 stevel #endif 343 0 stevel hrtime_t t_hrtime; /* high-res last time on cpu */ 344 2646 trevtom kmutex_t t_ctx_lock; /* protects t_ctx in removectx() */ 345 3792 akolb struct waitq *t_waitq; /* wait queue */ 346 8566 Madhavan kmutex_t t_wait_mutex; /* used in CV wait functions */ 347 0 stevel } kthread_t; 348 0 stevel 349 0 stevel /* 350 0 stevel * Thread flag (t_flag) definitions. 351 0 stevel * These flags must be changed only for the current thread, 352 0 stevel * and not during preemption code, since the code being 353 0 stevel * preempted could be modifying the flags. 354 0 stevel * 355 0 stevel * For the most part these flags do not need locking. 356 0 stevel * The following flags will only be changed while the thread_lock is held, 357 0 stevel * to give assurrance that they are consistent with t_state: 358 0 stevel * T_WAKEABLE 359 0 stevel */ 360 0 stevel #define T_INTR_THREAD 0x0001 /* thread is an interrupt thread */ 361 0 stevel #define T_WAKEABLE 0x0002 /* thread is blocked, signals enabled */ 362 0 stevel #define T_TOMASK 0x0004 /* use lwp_sigoldmask on return from signal */ 363 0 stevel #define T_TALLOCSTK 0x0008 /* thread structure allocated from stk */ 364 769 raf #define T_FORKALL 0x0010 /* thread was cloned by forkall() */ 365 0 stevel #define T_WOULDBLOCK 0x0020 /* for lockfs */ 366 0 stevel #define T_DONTBLOCK 0x0040 /* for lockfs */ 367 0 stevel #define T_DONTPEND 0x0080 /* for lockfs */ 368 0 stevel #define T_SYS_PROF 0x0100 /* profiling on for duration of system call */ 369 0 stevel #define T_WAITCVSEM 0x0200 /* waiting for a lwp_cv or lwp_sema on sleepq */ 370 0 stevel #define T_WATCHPT 0x0400 /* thread undergoing a watchpoint emulation */ 371 0 stevel #define T_PANIC 0x0800 /* thread initiated a system panic */ 372 0 stevel #define T_DFLTSTK 0x1000 /* stack is default size */ 373 3253 mec #define T_CAPTURING 0x2000 /* thread is in page capture logic */ 374 3828 raf #define T_VFPARENT 0x4000 /* thread is vfork parent, must call vfwait */ 375 4421 mb158278 #define T_DONTDTRACE 0x8000 /* disable DTrace probes */ 376 0 stevel 377 0 stevel /* 378 0 stevel * Flags in t_proc_flag. 379 0 stevel * These flags must be modified only when holding the p_lock 380 0 stevel * for the associated process. 381 0 stevel */ 382 0 stevel #define TP_DAEMON 0x0001 /* this is an LWP_DAEMON lwp */ 383 0 stevel #define TP_HOLDLWP 0x0002 /* hold thread's lwp */ 384 0 stevel #define TP_TWAIT 0x0004 /* wait to be freed by lwp_wait() */ 385 0 stevel #define TP_LWPEXIT 0x0008 /* lwp has exited */ 386 0 stevel #define TP_PRSTOP 0x0010 /* thread is being stopped via /proc */ 387 0 stevel #define TP_CHKPT 0x0020 /* thread is being stopped via CPR checkpoint */ 388 0 stevel #define TP_EXITLWP 0x0040 /* terminate this lwp */ 389 0 stevel #define TP_PRVSTOP 0x0080 /* thread is virtually stopped via /proc */ 390 0 stevel #define TP_MSACCT 0x0100 /* collect micro-state accounting information */ 391 0 stevel #define TP_STOPPING 0x0200 /* thread is executing stop() */ 392 0 stevel #define TP_WATCHPT 0x0400 /* process has watchpoints in effect */ 393 0 stevel #define TP_PAUSE 0x0800 /* process is being stopped via pauselwps() */ 394 0 stevel #define TP_CHANGEBIND 0x1000 /* thread has a new cpu/cpupart binding */ 395 0 stevel #define TP_ZTHREAD 0x2000 /* this is a kernel thread for a zone */ 396 0 stevel #define TP_WATCHSTOP 0x4000 /* thread is stopping via holdwatch() */ 397 0 stevel 398 0 stevel /* 399 0 stevel * Thread scheduler flag (t_schedflag) definitions. 400 0 stevel * The thread must be locked via thread_lock() or equiv. to change these. 401 0 stevel */ 402 0 stevel #define TS_LOAD 0x0001 /* thread is in memory */ 403 0 stevel #define TS_DONT_SWAP 0x0002 /* thread/lwp should not be swapped */ 404 0 stevel #define TS_SWAPENQ 0x0004 /* swap thread when it reaches a safe point */ 405 0 stevel #define TS_ON_SWAPQ 0x0008 /* thread is on the swap queue */ 406 0 stevel #define TS_SIGNALLED 0x0010 /* thread was awakened by cv_signal() */ 407 3792 akolb #define TS_PROJWAITQ 0x0020 /* thread is on its project's waitq */ 408 3792 akolb #define TS_ZONEWAITQ 0x0040 /* thread is on its zone's waitq */ 409 0 stevel #define TS_CSTART 0x0100 /* setrun() by continuelwps() */ 410 0 stevel #define TS_UNPAUSE 0x0200 /* setrun() by unpauselwps() */ 411 0 stevel #define TS_XSTART 0x0400 /* setrun() by SIGCONT */ 412 0 stevel #define TS_PSTART 0x0800 /* setrun() by /proc */ 413 0 stevel #define TS_RESUME 0x1000 /* setrun() by CPR resume process */ 414 0 stevel #define TS_CREATE 0x2000 /* setrun() by syslwp_create() */ 415 0 stevel #define TS_RUNQMATCH 0x4000 /* exact run queue balancing by setbackdq() */ 416 0 stevel #define TS_ALLSTART \ 417 0 stevel (TS_CSTART|TS_UNPAUSE|TS_XSTART|TS_PSTART|TS_RESUME|TS_CREATE) 418 3792 akolb #define TS_ANYWAITQ (TS_PROJWAITQ|TS_ZONEWAITQ) 419 0 stevel 420 0 stevel /* 421 6298 akolb * Thread binding types 422 6298 akolb */ 423 6298 akolb #define TB_ALLHARD 0 424 6298 akolb #define TB_CPU_SOFT 0x01 /* soft binding to CPU */ 425 6298 akolb #define TB_PSET_SOFT 0x02 /* soft binding to pset */ 426 6298 akolb 427 6298 akolb #define TB_CPU_SOFT_SET(t) ((t)->t_bindflag |= TB_CPU_SOFT) 428 6298 akolb #define TB_CPU_HARD_SET(t) ((t)->t_bindflag &= ~TB_CPU_SOFT) 429 6298 akolb #define TB_PSET_SOFT_SET(t) ((t)->t_bindflag |= TB_PSET_SOFT) 430 6298 akolb #define TB_PSET_HARD_SET(t) ((t)->t_bindflag &= ~TB_PSET_SOFT) 431 6298 akolb #define TB_CPU_IS_SOFT(t) ((t)->t_bindflag & TB_CPU_SOFT) 432 6298 akolb #define TB_CPU_IS_HARD(t) (!TB_CPU_IS_SOFT(t)) 433 6298 akolb #define TB_PSET_IS_SOFT(t) ((t)->t_bindflag & TB_PSET_SOFT) 434 6298 akolb 435 6298 akolb /* 436 0 stevel * No locking needed for AST field. 437 0 stevel */ 438 0 stevel #define aston(t) ((t)->t_astflag = 1) 439 0 stevel #define astoff(t) ((t)->t_astflag = 0) 440 0 stevel 441 0 stevel /* True if thread is stopped on an event of interest */ 442 0 stevel #define ISTOPPED(t) ((t)->t_state == TS_STOPPED && \ 443 0 stevel !((t)->t_schedflag & TS_PSTART)) 444 3792 akolb 445 3792 akolb /* True if thread is asleep and wakeable */ 446 3792 akolb #define ISWAKEABLE(t) (((t)->t_state == TS_SLEEP && \ 447 3792 akolb ((t)->t_flag & T_WAKEABLE))) 448 3792 akolb 449 3792 akolb /* True if thread is on the wait queue */ 450 3792 akolb #define ISWAITING(t) ((t)->t_state == TS_WAIT) 451 0 stevel 452 0 stevel /* similar to ISTOPPED except the event of interest is CPR */ 453 0 stevel #define CPR_ISTOPPED(t) ((t)->t_state == TS_STOPPED && \ 454 0 stevel !((t)->t_schedflag & TS_RESUME)) 455 0 stevel 456 0 stevel /* 457 0 stevel * True if thread is virtually stopped (is or was asleep in 458 0 stevel * one of the lwp_*() system calls and marked to stop by /proc.) 459 0 stevel */ 460 0 stevel #define VSTOPPED(t) ((t)->t_proc_flag & TP_PRVSTOP) 461 0 stevel 462 0 stevel /* similar to VSTOPPED except the point of interest is CPR */ 463 0 stevel #define CPR_VSTOPPED(t) \ 464 0 stevel ((t)->t_state == TS_SLEEP && \ 465 0 stevel (t)->t_wchan0 != NULL && \ 466 0 stevel ((t)->t_flag & T_WAKEABLE) && \ 467 0 stevel ((t)->t_proc_flag & TP_CHKPT)) 468 0 stevel 469 0 stevel /* True if thread has been stopped by hold*() or was created stopped */ 470 0 stevel #define SUSPENDED(t) ((t)->t_state == TS_STOPPED && \ 471 0 stevel ((t)->t_schedflag & (TS_CSTART|TS_UNPAUSE)) != (TS_CSTART|TS_UNPAUSE)) 472 0 stevel 473 0 stevel /* True if thread possesses an inherited priority */ 474 0 stevel #define INHERITED(t) ((t)->t_epri != 0) 475 0 stevel 476 0 stevel /* The dispatch priority of a thread */ 477 0 stevel #define DISP_PRIO(t) ((t)->t_epri > (t)->t_pri ? (t)->t_epri : (t)->t_pri) 478 0 stevel 479 0 stevel /* The assigned priority of a thread */ 480 0 stevel #define ASSIGNED_PRIO(t) ((t)->t_pri) 481 0 stevel 482 0 stevel /* 483 0 stevel * Macros to determine whether a thread can be swapped. 484 0 stevel * If t_lock is held, the thread is either on a processor or being swapped. 485 0 stevel */ 486 0 stevel #define SWAP_OK(t) (!LOCK_HELD(&(t)->t_lock)) 487 0 stevel 488 0 stevel /* 489 0 stevel * proctot(x) 490 0 stevel * convert a proc pointer to a thread pointer. this only works with 491 0 stevel * procs that have only one lwp. 492 0 stevel * 493 0 stevel * proctolwp(x) 494 0 stevel * convert a proc pointer to a lwp pointer. this only works with 495 0 stevel * procs that have only one lwp. 496 0 stevel * 497 0 stevel * ttolwp(x) 498 0 stevel * convert a thread pointer to its lwp pointer. 499 0 stevel * 500 0 stevel * ttoproc(x) 501 0 stevel * convert a thread pointer to its proc pointer. 502 0 stevel * 503 0 stevel * ttoproj(x) 504 0 stevel * convert a thread pointer to its project pointer. 505 0 stevel * 506 3792 akolb * ttozone(x) 507 3792 akolb * convert a thread pointer to its zone pointer. 508 3792 akolb * 509 0 stevel * lwptot(x) 510 0 stevel * convert a lwp pointer to its thread pointer. 511 0 stevel * 512 0 stevel * lwptoproc(x) 513 0 stevel * convert a lwp to its proc pointer. 514 0 stevel */ 515 0 stevel #define proctot(x) ((x)->p_tlist) 516 0 stevel #define proctolwp(x) ((x)->p_tlist->t_lwp) 517 0 stevel #define ttolwp(x) ((x)->t_lwp) 518 0 stevel #define ttoproc(x) ((x)->t_procp) 519 0 stevel #define ttoproj(x) ((x)->t_proj) 520 3792 akolb #define ttozone(x) ((x)->t_procp->p_zone) 521 0 stevel #define lwptot(x) ((x)->lwp_thread) 522 0 stevel #define lwptoproc(x) ((x)->lwp_procp) 523 0 stevel 524 0 stevel #define t_pc t_pcb.val[0] 525 0 stevel #define t_sp t_pcb.val[1] 526 0 stevel 527 0 stevel #ifdef _KERNEL 528 0 stevel 529 0 stevel extern kthread_t *threadp(void); /* inline, returns thread pointer */ 530 0 stevel #define curthread (threadp()) /* current thread pointer */ 531 0 stevel #define curproc (ttoproc(curthread)) /* current process pointer */ 532 0 stevel #define curproj (ttoproj(curthread)) /* current project pointer */ 533 3792 akolb #define curzone (curproc->p_zone) /* current zone pointer */ 534 0 stevel 535 0 stevel extern struct _kthread t0; /* the scheduler thread */ 536 0 stevel extern kmutex_t pidlock; /* global process lock */ 537 0 stevel 538 0 stevel /* 539 5788 mv143129 * thread_free_lock is used by the tick accounting thread to keep a thread 540 0 stevel * from being freed while it is being examined. 541 0 stevel */ 542 5788 mv143129 #define THREAD_FREE_NUM 1024 543 5788 mv143129 #define THREAD_FREE_MASK (THREAD_FREE_NUM - 1) 544 5788 mv143129 #define THREAD_FREE_SHIFT_BITS 5 545 5788 mv143129 #define THREAD_FREE_SHIFT(t) ((uintptr_t)t >> THREAD_FREE_SHIFT_BITS) 546 5788 mv143129 #define THREAD_FREE_HASH(t) (THREAD_FREE_SHIFT(t) & THREAD_FREE_MASK) 547 5788 mv143129 548 5788 mv143129 typedef struct thread_free_lock { 549 5788 mv143129 kmutex_t tf_lock; 550 5788 mv143129 uchar_t tf_pad[64 - sizeof (kmutex_t)]; 551 5788 mv143129 } thread_free_lock_t; 552 5788 mv143129 553 5788 mv143129 extern void thread_free_prevent(kthread_t *); 554 5788 mv143129 extern void thread_free_allow(kthread_t *); 555 0 stevel 556 0 stevel /* 557 0 stevel * Routines to change the priority and effective priority 558 0 stevel * of a thread-locked thread, whatever its state. 559 0 stevel */ 560 0 stevel extern int thread_change_pri(kthread_t *t, pri_t disp_pri, int front); 561 0 stevel extern void thread_change_epri(kthread_t *t, pri_t disp_pri); 562 0 stevel 563 0 stevel /* 564 0 stevel * Routines that manipulate the dispatcher lock for the thread. 565 0 stevel * The locking heirarchy is as follows: 566 0 stevel * cpu_lock > sleepq locks > run queue locks 567 0 stevel */ 568 0 stevel void thread_transition(kthread_t *); /* move to transition lock */ 569 0 stevel void thread_stop(kthread_t *); /* move to stop lock */ 570 0 stevel void thread_lock(kthread_t *); /* lock thread and its queue */ 571 0 stevel void thread_lock_high(kthread_t *); /* lock thread and its queue */ 572 0 stevel void thread_onproc(kthread_t *, struct cpu *); /* set onproc state lock */ 573 0 stevel 574 0 stevel #define thread_unlock(t) disp_lock_exit((t)->t_lockp) 575 0 stevel #define thread_unlock_high(t) disp_lock_exit_high((t)->t_lockp) 576 0 stevel #define thread_unlock_nopreempt(t) disp_lock_exit_nopreempt((t)->t_lockp) 577 0 stevel 578 0 stevel #define THREAD_LOCK_HELD(t) (DISP_LOCK_HELD((t)->t_lockp)) 579 0 stevel 580 0 stevel extern disp_lock_t transition_lock; /* lock protecting transiting threads */ 581 0 stevel extern disp_lock_t stop_lock; /* lock protecting stopped threads */ 582 0 stevel 583 0 stevel caddr_t thread_stk_init(caddr_t); /* init thread stack */ 584 0 stevel 585 6298 akolb extern int default_binding_mode; 586 6298 akolb 587 0 stevel #endif /* _KERNEL */ 588 0 stevel 589 0 stevel /* 590 0 stevel * Macros to indicate that the thread holds resources that could be critical 591 0 stevel * to other kernel threads, so this thread needs to have kernel priority 592 0 stevel * if it blocks or is preempted. Note that this is not necessary if the 593 0 stevel * resource is a mutex or a writer lock because of priority inheritance. 594 0 stevel * 595 0 stevel * The only way one thread may legally manipulate another thread's t_kpri_req 596 0 stevel * is to hold the target thread's thread lock while that thread is asleep. 597 0 stevel * (The rwlock code does this to implement direct handoff to waiting readers.) 598 0 stevel */ 599 0 stevel #define THREAD_KPRI_REQUEST() (curthread->t_kpri_req++) 600 0 stevel #define THREAD_KPRI_RELEASE() (curthread->t_kpri_req--) 601 0 stevel #define THREAD_KPRI_RELEASE_N(n) (curthread->t_kpri_req -= (n)) 602 0 stevel 603 0 stevel /* 604 0 stevel * Macro to change a thread's priority. 605 0 stevel */ 606 0 stevel #define THREAD_CHANGE_PRI(t, pri) { \ 607 0 stevel pri_t __new_pri = (pri); \ 608 0 stevel DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, __new_pri); \ 609 0 stevel (t)->t_pri = __new_pri; \ 610 6247 raf schedctl_set_cidpri(t); \ 611 0 stevel } 612 0 stevel 613 0 stevel /* 614 0 stevel * Macro to indicate that a thread's priority is about to be changed. 615 0 stevel */ 616 0 stevel #define THREAD_WILLCHANGE_PRI(t, pri) { \ 617 0 stevel DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, (pri)); \ 618 0 stevel } 619 0 stevel 620 0 stevel /* 621 0 stevel * Macros to change thread state and the associated lock. 622 0 stevel */ 623 0 stevel #define THREAD_SET_STATE(tp, state, lp) \ 624 0 stevel ((tp)->t_state = state, (tp)->t_lockp = lp) 625 0 stevel 626 0 stevel /* 627 0 stevel * Point it at the transition lock, which is always held. 628 0 stevel * The previosly held lock is dropped. 629 0 stevel */ 630 0 stevel #define THREAD_TRANSITION(tp) thread_transition(tp); 631 0 stevel /* 632 0 stevel * Set the thread's lock to be the transition lock, without dropping 633 0 stevel * previosly held lock. 634 0 stevel */ 635 0 stevel #define THREAD_TRANSITION_NOLOCK(tp) ((tp)->t_lockp = &transition_lock) 636 0 stevel 637 0 stevel /* 638 0 stevel * Put thread in run state, and set the lock pointer to the dispatcher queue 639 0 stevel * lock pointer provided. This lock should be held. 640 0 stevel */ 641 0 stevel #define THREAD_RUN(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp) 642 0 stevel 643 0 stevel /* 644 3792 akolb * Put thread in wait state, and set the lock pointer to the wait queue 645 3792 akolb * lock pointer provided. This lock should be held. 646 3792 akolb */ 647 3792 akolb #define THREAD_WAIT(tp, lp) THREAD_SET_STATE(tp, TS_WAIT, lp) 648 3792 akolb 649 3792 akolb /* 650 0 stevel * Put thread in run state, and set the lock pointer to the dispatcher queue 651 0 stevel * lock pointer provided (i.e., the "swapped_lock"). This lock should be held. 652 0 stevel */ 653 0 stevel #define THREAD_SWAP(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp) 654 0 stevel 655 0 stevel /* 656 0 stevel * Put the thread in zombie state and set the lock pointer to NULL. 657 0 stevel * The NULL will catch anything that tries to lock a zombie. 658 0 stevel */ 659 0 stevel #define THREAD_ZOMB(tp) THREAD_SET_STATE(tp, TS_ZOMB, NULL) 660 0 stevel 661 0 stevel /* 662 0 stevel * Set the thread into ONPROC state, and point the lock at the CPUs 663 0 stevel * lock for the onproc thread(s). This lock should be held, so the 664 0 stevel * thread deoes not become unlocked, since these stores can be reordered. 665 0 stevel */ 666 0 stevel #define THREAD_ONPROC(tp, cpu) \ 667 0 stevel THREAD_SET_STATE(tp, TS_ONPROC, &(cpu)->cpu_thread_lock) 668 0 stevel 669 0 stevel /* 670 0 stevel * Set the thread into the TS_SLEEP state, and set the lock pointer to 671 0 stevel * to some sleep queue's lock. The new lock should already be held. 672 0 stevel */ 673 0 stevel #define THREAD_SLEEP(tp, lp) { \ 674 0 stevel disp_lock_t *tlp; \ 675 0 stevel tlp = (tp)->t_lockp; \ 676 0 stevel THREAD_SET_STATE(tp, TS_SLEEP, lp); \ 677 0 stevel disp_lock_exit_high(tlp); \ 678 0 stevel } 679 0 stevel 680 0 stevel /* 681 0 stevel * Interrupt threads are created in TS_FREE state, and their lock 682 0 stevel * points at the associated CPU's lock. 683 0 stevel */ 684 0 stevel #define THREAD_FREEINTR(tp, cpu) \ 685 0 stevel THREAD_SET_STATE(tp, TS_FREE, &(cpu)->cpu_thread_lock) 686 0 stevel 687 7854 Philippe /* if tunable kmem_stackinfo is set, fill kthread stack with a pattern */ 688 7854 Philippe #define KMEM_STKINFO_PATTERN 0xbadcbadcbadcbadcULL 689 7854 Philippe 690 7854 Philippe /* 691 7854 Philippe * If tunable kmem_stackinfo is set, log the latest KMEM_LOG_STK_USAGE_SIZE 692 7854 Philippe * dead kthreads that used their kernel stack the most. 693 7854 Philippe */ 694 7854 Philippe #define KMEM_STKINFO_LOG_SIZE 16 695 7854 Philippe 696 7854 Philippe /* kthread name (cmd/lwpid) string size in the stackinfo log */ 697 7854 Philippe #define KMEM_STKINFO_STR_SIZE 64 698 7854 Philippe 699 7854 Philippe /* 700 7854 Philippe * stackinfo logged data. 701 7854 Philippe */ 702 7854 Philippe typedef struct kmem_stkinfo { 703 7854 Philippe caddr_t kthread; /* kthread pointer */ 704 7854 Philippe caddr_t t_startpc; /* where kthread started */ 705 7854 Philippe caddr_t start; /* kthread stack start address */ 706 7854 Philippe size_t stksz; /* kthread stack size */ 707 7854 Philippe size_t percent; /* kthread stack high water mark */ 708 7854 Philippe id_t t_tid; /* kthread id */ 709 7854 Philippe char cmd[KMEM_STKINFO_STR_SIZE]; /* kthread name (cmd/lwpid) */ 710 7854 Philippe } kmem_stkinfo_t; 711 7854 Philippe 712 0 stevel #ifdef __cplusplus 713 0 stevel } 714 0 stevel #endif 715 0 stevel 716 0 stevel #endif /* _SYS_THREAD_H */ 717
Indexes created Fri Nov 27 08:09:20 UTC 2009
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