1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #ifndef _SYS_THREAD_H 28*7c478bd9Sstevel@tonic-gate #define _SYS_THREAD_H 29*7c478bd9Sstevel@tonic-gate 30*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*7c478bd9Sstevel@tonic-gate 32*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 33*7c478bd9Sstevel@tonic-gate #include <sys/t_lock.h> 34*7c478bd9Sstevel@tonic-gate #include <sys/klwp.h> 35*7c478bd9Sstevel@tonic-gate #include <sys/time.h> 36*7c478bd9Sstevel@tonic-gate #include <sys/signal.h> 37*7c478bd9Sstevel@tonic-gate #include <sys/kcpc.h> 38*7c478bd9Sstevel@tonic-gate #if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL) 39*7c478bd9Sstevel@tonic-gate #include <asm/thread.h> 40*7c478bd9Sstevel@tonic-gate #endif 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 43*7c478bd9Sstevel@tonic-gate extern "C" { 44*7c478bd9Sstevel@tonic-gate #endif 45*7c478bd9Sstevel@tonic-gate 46*7c478bd9Sstevel@tonic-gate /* 47*7c478bd9Sstevel@tonic-gate * The thread object, its states, and the methods by which it 48*7c478bd9Sstevel@tonic-gate * is accessed. 49*7c478bd9Sstevel@tonic-gate */ 50*7c478bd9Sstevel@tonic-gate 51*7c478bd9Sstevel@tonic-gate /* 52*7c478bd9Sstevel@tonic-gate * Values that t_state may assume. Note that t_state cannot have more 53*7c478bd9Sstevel@tonic-gate * than one of these flags set at a time. 54*7c478bd9Sstevel@tonic-gate */ 55*7c478bd9Sstevel@tonic-gate #define TS_FREE 0x00 /* Thread at loose ends */ 56*7c478bd9Sstevel@tonic-gate #define TS_SLEEP 0x01 /* Awaiting an event */ 57*7c478bd9Sstevel@tonic-gate #define TS_RUN 0x02 /* Runnable, but not yet on a processor */ 58*7c478bd9Sstevel@tonic-gate #define TS_ONPROC 0x04 /* Thread is being run on a processor */ 59*7c478bd9Sstevel@tonic-gate #define TS_ZOMB 0x08 /* Thread has died but hasn't been reaped */ 60*7c478bd9Sstevel@tonic-gate #define TS_STOPPED 0x10 /* Stopped, initial state */ 61*7c478bd9Sstevel@tonic-gate 62*7c478bd9Sstevel@tonic-gate typedef struct ctxop { 63*7c478bd9Sstevel@tonic-gate void (*save_op)(void *); /* function to invoke to save context */ 64*7c478bd9Sstevel@tonic-gate void (*restore_op)(void *); /* function to invoke to restore ctx */ 65*7c478bd9Sstevel@tonic-gate void (*fork_op)(void *, void *); /* invoke to fork context */ 66*7c478bd9Sstevel@tonic-gate void (*lwp_create_op)(void *, void *); /* lwp_create context */ 67*7c478bd9Sstevel@tonic-gate void (*exit_op)(void *); /* invoked during {thread,lwp}_exit() */ 68*7c478bd9Sstevel@tonic-gate void (*free_op)(void *, int); /* function which frees the context */ 69*7c478bd9Sstevel@tonic-gate void *arg; /* argument to above functions, ctx pointer */ 70*7c478bd9Sstevel@tonic-gate struct ctxop *next; /* next context ops */ 71*7c478bd9Sstevel@tonic-gate } ctxop_t; 72*7c478bd9Sstevel@tonic-gate 73*7c478bd9Sstevel@tonic-gate /* 74*7c478bd9Sstevel@tonic-gate * The active file descriptor table. 75*7c478bd9Sstevel@tonic-gate * Each member of a_fd[] not equalling -1 represents an active fd. 76*7c478bd9Sstevel@tonic-gate * The structure is initialized on first use; all zeros means uninitialized. 77*7c478bd9Sstevel@tonic-gate */ 78*7c478bd9Sstevel@tonic-gate typedef struct _afd { 79*7c478bd9Sstevel@tonic-gate int *a_fd; /* pointer to list of fds */ 80*7c478bd9Sstevel@tonic-gate short a_nfd; /* number of entries in *a_fd */ 81*7c478bd9Sstevel@tonic-gate short a_stale; /* one of the active fds is being closed */ 82*7c478bd9Sstevel@tonic-gate int a_buf[1]; /* buffer to which a_fd initially refers */ 83*7c478bd9Sstevel@tonic-gate } afd_t; 84*7c478bd9Sstevel@tonic-gate 85*7c478bd9Sstevel@tonic-gate /* 86*7c478bd9Sstevel@tonic-gate * An lwpchan provides uniqueness when sleeping on user-level 87*7c478bd9Sstevel@tonic-gate * synchronization primitives. The lc_wchan member is used 88*7c478bd9Sstevel@tonic-gate * for sleeping on kernel synchronization primitives. 89*7c478bd9Sstevel@tonic-gate */ 90*7c478bd9Sstevel@tonic-gate typedef struct { 91*7c478bd9Sstevel@tonic-gate caddr_t lc_wchan0; 92*7c478bd9Sstevel@tonic-gate caddr_t lc_wchan; 93*7c478bd9Sstevel@tonic-gate } lwpchan_t; 94*7c478bd9Sstevel@tonic-gate 95*7c478bd9Sstevel@tonic-gate typedef struct _kthread *kthread_id_t; 96*7c478bd9Sstevel@tonic-gate 97*7c478bd9Sstevel@tonic-gate struct turnstile; 98*7c478bd9Sstevel@tonic-gate struct trap_info; 99*7c478bd9Sstevel@tonic-gate struct upimutex; 100*7c478bd9Sstevel@tonic-gate struct kproject; 101*7c478bd9Sstevel@tonic-gate struct on_trap_data; 102*7c478bd9Sstevel@tonic-gate 103*7c478bd9Sstevel@tonic-gate /* Definition for kernel thread identifier type */ 104*7c478bd9Sstevel@tonic-gate typedef uint64_t kt_did_t; 105*7c478bd9Sstevel@tonic-gate 106*7c478bd9Sstevel@tonic-gate typedef struct _kthread { 107*7c478bd9Sstevel@tonic-gate struct _kthread *t_link; /* dispq, sleepq, and free queue link */ 108*7c478bd9Sstevel@tonic-gate 109*7c478bd9Sstevel@tonic-gate caddr_t t_stk; /* base of stack (kernel sp value to use) */ 110*7c478bd9Sstevel@tonic-gate #if defined(__ia64) 111*7c478bd9Sstevel@tonic-gate caddr_t t_regstk; /* base of register stack (initial bsp value) */ 112*7c478bd9Sstevel@tonic-gate #endif 113*7c478bd9Sstevel@tonic-gate void (*t_startpc)(void); /* PC where thread started */ 114*7c478bd9Sstevel@tonic-gate struct cpu *t_bound_cpu; /* cpu bound to, or NULL if not bound */ 115*7c478bd9Sstevel@tonic-gate short t_affinitycnt; /* nesting level of kernel affinity-setting */ 116*7c478bd9Sstevel@tonic-gate short t_bind_cpu; /* user-specified CPU binding (-1 if none) */ 117*7c478bd9Sstevel@tonic-gate ushort_t t_flag; /* modified only by current thread */ 118*7c478bd9Sstevel@tonic-gate ushort_t t_proc_flag; /* modified holding ttproc(t)->p_lock */ 119*7c478bd9Sstevel@tonic-gate ushort_t t_schedflag; /* modified holding thread_lock(t) */ 120*7c478bd9Sstevel@tonic-gate volatile char t_preempt; /* don't preempt thread if set */ 121*7c478bd9Sstevel@tonic-gate volatile char t_preempt_lk; 122*7c478bd9Sstevel@tonic-gate uint_t t_state; /* thread state (protected by thread_lock) */ 123*7c478bd9Sstevel@tonic-gate pri_t t_pri; /* assigned thread priority */ 124*7c478bd9Sstevel@tonic-gate pri_t t_epri; /* inherited thread priority */ 125*7c478bd9Sstevel@tonic-gate char t_writer; /* sleeping in lwp_rwlock_lock(RW_WRITE_LOCK) */ 126*7c478bd9Sstevel@tonic-gate label_t t_pcb; /* pcb, save area when switching */ 127*7c478bd9Sstevel@tonic-gate lwpchan_t t_lwpchan; /* reason for blocking */ 128*7c478bd9Sstevel@tonic-gate #define t_wchan0 t_lwpchan.lc_wchan0 129*7c478bd9Sstevel@tonic-gate #define t_wchan t_lwpchan.lc_wchan 130*7c478bd9Sstevel@tonic-gate struct _sobj_ops *t_sobj_ops; 131*7c478bd9Sstevel@tonic-gate id_t t_cid; /* scheduling class id */ 132*7c478bd9Sstevel@tonic-gate struct thread_ops *t_clfuncs; /* scheduling class ops vector */ 133*7c478bd9Sstevel@tonic-gate void *t_cldata; /* per scheduling class specific data */ 134*7c478bd9Sstevel@tonic-gate ctxop_t *t_ctx; /* thread context */ 135*7c478bd9Sstevel@tonic-gate uintptr_t t_lofault; /* ret pc for failed page faults */ 136*7c478bd9Sstevel@tonic-gate label_t *t_onfault; /* on_fault() setjmp buf */ 137*7c478bd9Sstevel@tonic-gate struct on_trap_data *t_ontrap; /* on_trap() protection data */ 138*7c478bd9Sstevel@tonic-gate caddr_t t_swap; /* swappable thread storage */ 139*7c478bd9Sstevel@tonic-gate lock_t t_lock; /* used to resume() a thread */ 140*7c478bd9Sstevel@tonic-gate uint8_t t_lockstat; /* set while thread is in lockstat code */ 141*7c478bd9Sstevel@tonic-gate uint8_t t_pil; /* interrupt thread PIL */ 142*7c478bd9Sstevel@tonic-gate disp_lock_t t_pi_lock; /* lock protecting t_prioinv list */ 143*7c478bd9Sstevel@tonic-gate char t_nomigrate; /* do not migrate if set */ 144*7c478bd9Sstevel@tonic-gate struct cpu *t_cpu; /* CPU that thread last ran on */ 145*7c478bd9Sstevel@tonic-gate struct cpu *t_weakbound_cpu; /* cpu weakly bound to */ 146*7c478bd9Sstevel@tonic-gate struct lgrp_ld *t_lpl; /* load average for home lgroup */ 147*7c478bd9Sstevel@tonic-gate void *t_lgrp_reserv[2]; /* reserved for future */ 148*7c478bd9Sstevel@tonic-gate struct _kthread *t_intr; /* interrupted (pinned) thread */ 149*7c478bd9Sstevel@tonic-gate uint64_t t_intr_start; /* timestamp when time slice began */ 150*7c478bd9Sstevel@tonic-gate kt_did_t t_did; /* thread id for kernel debuggers */ 151*7c478bd9Sstevel@tonic-gate caddr_t t_tnf_tpdp; /* Trace facility data pointer */ 152*7c478bd9Sstevel@tonic-gate kcpc_ctx_t *t_cpc_ctx; /* performance counter context */ 153*7c478bd9Sstevel@tonic-gate kcpc_set_t *t_cpc_set; /* set this thread has bound */ 154*7c478bd9Sstevel@tonic-gate 155*7c478bd9Sstevel@tonic-gate /* 156*7c478bd9Sstevel@tonic-gate * non swappable part of the lwp state. 157*7c478bd9Sstevel@tonic-gate */ 158*7c478bd9Sstevel@tonic-gate id_t t_tid; /* lwp's id */ 159*7c478bd9Sstevel@tonic-gate id_t t_waitfor; /* target lwp id in lwp_wait() */ 160*7c478bd9Sstevel@tonic-gate struct sigqueue *t_sigqueue; /* queue of siginfo structs */ 161*7c478bd9Sstevel@tonic-gate k_sigset_t t_sig; /* signals pending to this process */ 162*7c478bd9Sstevel@tonic-gate k_sigset_t t_extsig; /* signals sent from another contract */ 163*7c478bd9Sstevel@tonic-gate k_sigset_t t_hold; /* hold signal bit mask */ 164*7c478bd9Sstevel@tonic-gate struct _kthread *t_forw; /* process's forward thread link */ 165*7c478bd9Sstevel@tonic-gate struct _kthread *t_back; /* process's backward thread link */ 166*7c478bd9Sstevel@tonic-gate struct _kthread *t_thlink; /* tid (lwpid) lookup hash link */ 167*7c478bd9Sstevel@tonic-gate klwp_t *t_lwp; /* thread's lwp pointer */ 168*7c478bd9Sstevel@tonic-gate struct proc *t_procp; /* proc pointer */ 169*7c478bd9Sstevel@tonic-gate struct t_audit_data *t_audit_data; /* per thread audit data */ 170*7c478bd9Sstevel@tonic-gate struct _kthread *t_next; /* doubly linked list of all threads */ 171*7c478bd9Sstevel@tonic-gate struct _kthread *t_prev; 172*7c478bd9Sstevel@tonic-gate ushort_t t_whystop; /* reason for stopping */ 173*7c478bd9Sstevel@tonic-gate ushort_t t_whatstop; /* more detailed reason */ 174*7c478bd9Sstevel@tonic-gate int t_dslot; /* index in proc's thread directory */ 175*7c478bd9Sstevel@tonic-gate struct pollstate *t_pollstate; /* state used during poll(2) */ 176*7c478bd9Sstevel@tonic-gate struct pollcache *t_pollcache; /* to pass a pcache ptr by /dev/poll */ 177*7c478bd9Sstevel@tonic-gate struct cred *t_cred; /* pointer to current cred */ 178*7c478bd9Sstevel@tonic-gate time_t t_start; /* start time, seconds since epoch */ 179*7c478bd9Sstevel@tonic-gate clock_t t_lbolt; /* lbolt at last clock_tick() */ 180*7c478bd9Sstevel@tonic-gate hrtime_t t_stoptime; /* timestamp at stop() */ 181*7c478bd9Sstevel@tonic-gate uint_t t_pctcpu; /* %cpu at last clock_tick(), binary */ 182*7c478bd9Sstevel@tonic-gate /* point at right of high-order bit */ 183*7c478bd9Sstevel@tonic-gate short t_sysnum; /* system call number */ 184*7c478bd9Sstevel@tonic-gate kcondvar_t t_delay_cv; 185*7c478bd9Sstevel@tonic-gate kmutex_t t_delay_lock; 186*7c478bd9Sstevel@tonic-gate 187*7c478bd9Sstevel@tonic-gate /* 188*7c478bd9Sstevel@tonic-gate * Pointer to the dispatcher lock protecting t_state and state-related 189*7c478bd9Sstevel@tonic-gate * flags. This pointer can change during waits on the lock, so 190*7c478bd9Sstevel@tonic-gate * it should be grabbed only by thread_lock(). 191*7c478bd9Sstevel@tonic-gate */ 192*7c478bd9Sstevel@tonic-gate disp_lock_t *t_lockp; /* pointer to the dispatcher lock */ 193*7c478bd9Sstevel@tonic-gate ushort_t t_oldspl; /* spl level before dispatcher locked */ 194*7c478bd9Sstevel@tonic-gate volatile char t_pre_sys; /* pre-syscall work needed */ 195*7c478bd9Sstevel@tonic-gate lock_t t_lock_flush; /* for lock_mutex_flush() impl */ 196*7c478bd9Sstevel@tonic-gate struct _disp *t_disp_queue; /* run queue for chosen CPU */ 197*7c478bd9Sstevel@tonic-gate clock_t t_disp_time; /* last time this thread was running */ 198*7c478bd9Sstevel@tonic-gate uint_t t_kpri_req; /* kernel priority required */ 199*7c478bd9Sstevel@tonic-gate 200*7c478bd9Sstevel@tonic-gate /* 201*7c478bd9Sstevel@tonic-gate * Post-syscall / post-trap flags. 202*7c478bd9Sstevel@tonic-gate * No lock is required to set these. 203*7c478bd9Sstevel@tonic-gate * These must be cleared only by the thread itself. 204*7c478bd9Sstevel@tonic-gate * 205*7c478bd9Sstevel@tonic-gate * t_astflag indicates that some post-trap processing is required, 206*7c478bd9Sstevel@tonic-gate * possibly a signal or a preemption. The thread will not 207*7c478bd9Sstevel@tonic-gate * return to user with this set. 208*7c478bd9Sstevel@tonic-gate * t_post_sys indicates that some unusualy post-system call 209*7c478bd9Sstevel@tonic-gate * handling is required, such as an error or tracing. 210*7c478bd9Sstevel@tonic-gate * t_sig_check indicates that some condition in ISSIG() must be 211*7c478bd9Sstevel@tonic-gate * checked, but doesn't prevent returning to user. 212*7c478bd9Sstevel@tonic-gate * t_post_sys_ast is a way of checking whether any of these three 213*7c478bd9Sstevel@tonic-gate * flags are set. 214*7c478bd9Sstevel@tonic-gate */ 215*7c478bd9Sstevel@tonic-gate union __tu { 216*7c478bd9Sstevel@tonic-gate struct __ts { 217*7c478bd9Sstevel@tonic-gate volatile char _t_astflag; /* AST requested */ 218*7c478bd9Sstevel@tonic-gate volatile char _t_sig_check; /* ISSIG required */ 219*7c478bd9Sstevel@tonic-gate volatile char _t_post_sys; /* post_syscall req */ 220*7c478bd9Sstevel@tonic-gate volatile char _t_trapret; /* call CL_TRAPRET */ 221*7c478bd9Sstevel@tonic-gate } _ts; 222*7c478bd9Sstevel@tonic-gate volatile int _t_post_sys_ast; /* OR of these flags */ 223*7c478bd9Sstevel@tonic-gate } _tu; 224*7c478bd9Sstevel@tonic-gate #define t_astflag _tu._ts._t_astflag 225*7c478bd9Sstevel@tonic-gate #define t_sig_check _tu._ts._t_sig_check 226*7c478bd9Sstevel@tonic-gate #define t_post_sys _tu._ts._t_post_sys 227*7c478bd9Sstevel@tonic-gate #define t_trapret _tu._ts._t_trapret 228*7c478bd9Sstevel@tonic-gate #define t_post_sys_ast _tu._t_post_sys_ast 229*7c478bd9Sstevel@tonic-gate 230*7c478bd9Sstevel@tonic-gate /* 231*7c478bd9Sstevel@tonic-gate * Real time microstate profiling. 232*7c478bd9Sstevel@tonic-gate */ 233*7c478bd9Sstevel@tonic-gate /* possible 4-byte filler */ 234*7c478bd9Sstevel@tonic-gate hrtime_t t_waitrq; /* timestamp for run queue wait time */ 235*7c478bd9Sstevel@tonic-gate int t_mstate; /* current microstate */ 236*7c478bd9Sstevel@tonic-gate struct rprof { 237*7c478bd9Sstevel@tonic-gate int rp_anystate; /* set if any state non-zero */ 238*7c478bd9Sstevel@tonic-gate uint_t rp_state[NMSTATES]; /* mstate profiling counts */ 239*7c478bd9Sstevel@tonic-gate } *t_rprof; 240*7c478bd9Sstevel@tonic-gate 241*7c478bd9Sstevel@tonic-gate /* 242*7c478bd9Sstevel@tonic-gate * There is a turnstile inserted into the list below for 243*7c478bd9Sstevel@tonic-gate * every priority inverted synchronization object that 244*7c478bd9Sstevel@tonic-gate * this thread holds. 245*7c478bd9Sstevel@tonic-gate */ 246*7c478bd9Sstevel@tonic-gate 247*7c478bd9Sstevel@tonic-gate struct turnstile *t_prioinv; 248*7c478bd9Sstevel@tonic-gate 249*7c478bd9Sstevel@tonic-gate /* 250*7c478bd9Sstevel@tonic-gate * Pointer to the turnstile attached to the synchronization 251*7c478bd9Sstevel@tonic-gate * object where this thread is blocked. 252*7c478bd9Sstevel@tonic-gate */ 253*7c478bd9Sstevel@tonic-gate 254*7c478bd9Sstevel@tonic-gate struct turnstile *t_ts; 255*7c478bd9Sstevel@tonic-gate 256*7c478bd9Sstevel@tonic-gate /* 257*7c478bd9Sstevel@tonic-gate * kernel thread specific data 258*7c478bd9Sstevel@tonic-gate * Borrowed from userland implementation of POSIX tsd 259*7c478bd9Sstevel@tonic-gate */ 260*7c478bd9Sstevel@tonic-gate struct tsd_thread { 261*7c478bd9Sstevel@tonic-gate struct tsd_thread *ts_next; /* threads with TSD */ 262*7c478bd9Sstevel@tonic-gate struct tsd_thread *ts_prev; /* threads with TSD */ 263*7c478bd9Sstevel@tonic-gate uint_t ts_nkeys; /* entries in value array */ 264*7c478bd9Sstevel@tonic-gate void **ts_value; /* array of value/key */ 265*7c478bd9Sstevel@tonic-gate } *t_tsd; 266*7c478bd9Sstevel@tonic-gate 267*7c478bd9Sstevel@tonic-gate clock_t t_stime; /* time stamp used by the swapper */ 268*7c478bd9Sstevel@tonic-gate struct door_data *t_door; /* door invocation data */ 269*7c478bd9Sstevel@tonic-gate kmutex_t *t_plockp; /* pointer to process's p_lock */ 270*7c478bd9Sstevel@tonic-gate 271*7c478bd9Sstevel@tonic-gate struct sc_shared *t_schedctl; /* scheduler activations shared data */ 272*7c478bd9Sstevel@tonic-gate uintptr_t t_sc_uaddr; /* user-level address of shared data */ 273*7c478bd9Sstevel@tonic-gate 274*7c478bd9Sstevel@tonic-gate struct cpupart *t_cpupart; /* partition containing thread */ 275*7c478bd9Sstevel@tonic-gate int t_bind_pset; /* processor set binding */ 276*7c478bd9Sstevel@tonic-gate 277*7c478bd9Sstevel@tonic-gate struct copyops *t_copyops; /* copy in/out ops vector */ 278*7c478bd9Sstevel@tonic-gate 279*7c478bd9Sstevel@tonic-gate caddr_t t_stkbase; /* base of the the stack */ 280*7c478bd9Sstevel@tonic-gate #if defined(__ia64) 281*7c478bd9Sstevel@tonic-gate size_t t_stksize; /* size of the the stack */ 282*7c478bd9Sstevel@tonic-gate #endif 283*7c478bd9Sstevel@tonic-gate struct page *t_red_pp; /* if non-NULL, redzone is mapped */ 284*7c478bd9Sstevel@tonic-gate 285*7c478bd9Sstevel@tonic-gate struct _afd t_activefd; /* active file descriptor table */ 286*7c478bd9Sstevel@tonic-gate 287*7c478bd9Sstevel@tonic-gate struct _kthread *t_priforw; /* sleepq per-priority sublist */ 288*7c478bd9Sstevel@tonic-gate struct _kthread *t_priback; 289*7c478bd9Sstevel@tonic-gate 290*7c478bd9Sstevel@tonic-gate struct sleepq *t_sleepq; /* sleep queue thread is waiting on */ 291*7c478bd9Sstevel@tonic-gate struct trap_info *t_panic_trap; /* saved data from fatal trap */ 292*7c478bd9Sstevel@tonic-gate int *t_lgrp_affinity; /* lgroup affinity */ 293*7c478bd9Sstevel@tonic-gate struct upimutex *t_upimutex; /* list of upimutexes owned by thread */ 294*7c478bd9Sstevel@tonic-gate uint32_t t_nupinest; /* number of nested held upi mutexes */ 295*7c478bd9Sstevel@tonic-gate struct kproject *t_proj; /* project containing this thread */ 296*7c478bd9Sstevel@tonic-gate uint8_t t_unpark; /* modified holding t_delay_lock */ 297*7c478bd9Sstevel@tonic-gate uint8_t t_release; /* lwp_release() waked up the thread */ 298*7c478bd9Sstevel@tonic-gate uint8_t t_hatdepth; /* depth of recursive hat_memloads */ 299*7c478bd9Sstevel@tonic-gate kcondvar_t t_joincv; /* cv used to wait for thread exit */ 300*7c478bd9Sstevel@tonic-gate void *t_taskq; /* for threads belonging to taskq */ 301*7c478bd9Sstevel@tonic-gate hrtime_t t_anttime; /* most recent time anticipatory load */ 302*7c478bd9Sstevel@tonic-gate /* was added to an lgroup's load */ 303*7c478bd9Sstevel@tonic-gate /* on this thread's behalf */ 304*7c478bd9Sstevel@tonic-gate char *t_pdmsg; /* privilege debugging message */ 305*7c478bd9Sstevel@tonic-gate 306*7c478bd9Sstevel@tonic-gate uint_t t_predcache; /* DTrace predicate cache */ 307*7c478bd9Sstevel@tonic-gate hrtime_t t_dtrace_vtime; /* DTrace virtual time */ 308*7c478bd9Sstevel@tonic-gate hrtime_t t_dtrace_start; /* DTrace slice start time */ 309*7c478bd9Sstevel@tonic-gate 310*7c478bd9Sstevel@tonic-gate uint8_t t_dtrace_stop; /* indicates a DTrace-desired stop */ 311*7c478bd9Sstevel@tonic-gate uint8_t t_dtrace_sig; /* signal sent via DTrace's raise() */ 312*7c478bd9Sstevel@tonic-gate 313*7c478bd9Sstevel@tonic-gate union __tdu { 314*7c478bd9Sstevel@tonic-gate struct __tds { 315*7c478bd9Sstevel@tonic-gate uint8_t _t_dtrace_on; /* hit a fasttrap tracepoint */ 316*7c478bd9Sstevel@tonic-gate uint8_t _t_dtrace_step; /* about to return to kernel */ 317*7c478bd9Sstevel@tonic-gate uint8_t _t_dtrace_ret; /* handling a return probe */ 318*7c478bd9Sstevel@tonic-gate uint8_t _t_dtrace_ast; /* saved ast flag */ 319*7c478bd9Sstevel@tonic-gate #ifdef __amd64 320*7c478bd9Sstevel@tonic-gate uint8_t _t_dtrace_reg; /* modified register */ 321*7c478bd9Sstevel@tonic-gate #endif 322*7c478bd9Sstevel@tonic-gate } _tds; 323*7c478bd9Sstevel@tonic-gate ulong_t _t_dtrace_ft; /* bitwise or of these flags */ 324*7c478bd9Sstevel@tonic-gate } _tdu; 325*7c478bd9Sstevel@tonic-gate #define t_dtrace_ft _tdu._t_dtrace_ft 326*7c478bd9Sstevel@tonic-gate #define t_dtrace_on _tdu._tds._t_dtrace_on 327*7c478bd9Sstevel@tonic-gate #define t_dtrace_step _tdu._tds._t_dtrace_step 328*7c478bd9Sstevel@tonic-gate #define t_dtrace_ret _tdu._tds._t_dtrace_ret 329*7c478bd9Sstevel@tonic-gate #define t_dtrace_ast _tdu._tds._t_dtrace_ast 330*7c478bd9Sstevel@tonic-gate #ifdef __amd64 331*7c478bd9Sstevel@tonic-gate #define t_dtrace_reg _tdu._tds._t_dtrace_reg 332*7c478bd9Sstevel@tonic-gate #endif 333*7c478bd9Sstevel@tonic-gate 334*7c478bd9Sstevel@tonic-gate uintptr_t t_dtrace_pc; /* DTrace saved pc from fasttrap */ 335*7c478bd9Sstevel@tonic-gate uintptr_t t_dtrace_npc; /* DTrace next pc from fasttrap */ 336*7c478bd9Sstevel@tonic-gate uintptr_t t_dtrace_scrpc; /* DTrace per-thread scratch location */ 337*7c478bd9Sstevel@tonic-gate uintptr_t t_dtrace_astpc; /* DTrace return sequence location */ 338*7c478bd9Sstevel@tonic-gate #ifdef __amd64 339*7c478bd9Sstevel@tonic-gate uint64_t t_dtrace_regv; /* DTrace saved reg from fasttrap */ 340*7c478bd9Sstevel@tonic-gate #endif 341*7c478bd9Sstevel@tonic-gate hrtime_t t_hrtime; /* high-res last time on cpu */ 342*7c478bd9Sstevel@tonic-gate } kthread_t; 343*7c478bd9Sstevel@tonic-gate 344*7c478bd9Sstevel@tonic-gate /* 345*7c478bd9Sstevel@tonic-gate * Thread flag (t_flag) definitions. 346*7c478bd9Sstevel@tonic-gate * These flags must be changed only for the current thread, 347*7c478bd9Sstevel@tonic-gate * and not during preemption code, since the code being 348*7c478bd9Sstevel@tonic-gate * preempted could be modifying the flags. 349*7c478bd9Sstevel@tonic-gate * 350*7c478bd9Sstevel@tonic-gate * For the most part these flags do not need locking. 351*7c478bd9Sstevel@tonic-gate * The following flags will only be changed while the thread_lock is held, 352*7c478bd9Sstevel@tonic-gate * to give assurrance that they are consistent with t_state: 353*7c478bd9Sstevel@tonic-gate * T_WAKEABLE 354*7c478bd9Sstevel@tonic-gate */ 355*7c478bd9Sstevel@tonic-gate #define T_INTR_THREAD 0x0001 /* thread is an interrupt thread */ 356*7c478bd9Sstevel@tonic-gate #define T_WAKEABLE 0x0002 /* thread is blocked, signals enabled */ 357*7c478bd9Sstevel@tonic-gate #define T_TOMASK 0x0004 /* use lwp_sigoldmask on return from signal */ 358*7c478bd9Sstevel@tonic-gate #define T_TALLOCSTK 0x0008 /* thread structure allocated from stk */ 359*7c478bd9Sstevel@tonic-gate #define T_WOULDBLOCK 0x0020 /* for lockfs */ 360*7c478bd9Sstevel@tonic-gate #define T_DONTBLOCK 0x0040 /* for lockfs */ 361*7c478bd9Sstevel@tonic-gate #define T_DONTPEND 0x0080 /* for lockfs */ 362*7c478bd9Sstevel@tonic-gate #define T_SYS_PROF 0x0100 /* profiling on for duration of system call */ 363*7c478bd9Sstevel@tonic-gate #define T_WAITCVSEM 0x0200 /* waiting for a lwp_cv or lwp_sema on sleepq */ 364*7c478bd9Sstevel@tonic-gate #define T_WATCHPT 0x0400 /* thread undergoing a watchpoint emulation */ 365*7c478bd9Sstevel@tonic-gate #define T_PANIC 0x0800 /* thread initiated a system panic */ 366*7c478bd9Sstevel@tonic-gate #define T_DFLTSTK 0x1000 /* stack is default size */ 367*7c478bd9Sstevel@tonic-gate 368*7c478bd9Sstevel@tonic-gate /* 369*7c478bd9Sstevel@tonic-gate * Flags in t_proc_flag. 370*7c478bd9Sstevel@tonic-gate * These flags must be modified only when holding the p_lock 371*7c478bd9Sstevel@tonic-gate * for the associated process. 372*7c478bd9Sstevel@tonic-gate */ 373*7c478bd9Sstevel@tonic-gate #define TP_DAEMON 0x0001 /* this is an LWP_DAEMON lwp */ 374*7c478bd9Sstevel@tonic-gate #define TP_HOLDLWP 0x0002 /* hold thread's lwp */ 375*7c478bd9Sstevel@tonic-gate #define TP_TWAIT 0x0004 /* wait to be freed by lwp_wait() */ 376*7c478bd9Sstevel@tonic-gate #define TP_LWPEXIT 0x0008 /* lwp has exited */ 377*7c478bd9Sstevel@tonic-gate #define TP_PRSTOP 0x0010 /* thread is being stopped via /proc */ 378*7c478bd9Sstevel@tonic-gate #define TP_CHKPT 0x0020 /* thread is being stopped via CPR checkpoint */ 379*7c478bd9Sstevel@tonic-gate #define TP_EXITLWP 0x0040 /* terminate this lwp */ 380*7c478bd9Sstevel@tonic-gate #define TP_PRVSTOP 0x0080 /* thread is virtually stopped via /proc */ 381*7c478bd9Sstevel@tonic-gate #define TP_MSACCT 0x0100 /* collect micro-state accounting information */ 382*7c478bd9Sstevel@tonic-gate #define TP_STOPPING 0x0200 /* thread is executing stop() */ 383*7c478bd9Sstevel@tonic-gate #define TP_WATCHPT 0x0400 /* process has watchpoints in effect */ 384*7c478bd9Sstevel@tonic-gate #define TP_PAUSE 0x0800 /* process is being stopped via pauselwps() */ 385*7c478bd9Sstevel@tonic-gate #define TP_CHANGEBIND 0x1000 /* thread has a new cpu/cpupart binding */ 386*7c478bd9Sstevel@tonic-gate #define TP_ZTHREAD 0x2000 /* this is a kernel thread for a zone */ 387*7c478bd9Sstevel@tonic-gate #define TP_WATCHSTOP 0x4000 /* thread is stopping via holdwatch() */ 388*7c478bd9Sstevel@tonic-gate 389*7c478bd9Sstevel@tonic-gate /* 390*7c478bd9Sstevel@tonic-gate * Thread scheduler flag (t_schedflag) definitions. 391*7c478bd9Sstevel@tonic-gate * The thread must be locked via thread_lock() or equiv. to change these. 392*7c478bd9Sstevel@tonic-gate */ 393*7c478bd9Sstevel@tonic-gate #define TS_LOAD 0x0001 /* thread is in memory */ 394*7c478bd9Sstevel@tonic-gate #define TS_DONT_SWAP 0x0002 /* thread/lwp should not be swapped */ 395*7c478bd9Sstevel@tonic-gate #define TS_SWAPENQ 0x0004 /* swap thread when it reaches a safe point */ 396*7c478bd9Sstevel@tonic-gate #define TS_ON_SWAPQ 0x0008 /* thread is on the swap queue */ 397*7c478bd9Sstevel@tonic-gate #define TS_SIGNALLED 0x0010 /* thread was awakened by cv_signal() */ 398*7c478bd9Sstevel@tonic-gate #define TS_CSTART 0x0100 /* setrun() by continuelwps() */ 399*7c478bd9Sstevel@tonic-gate #define TS_UNPAUSE 0x0200 /* setrun() by unpauselwps() */ 400*7c478bd9Sstevel@tonic-gate #define TS_XSTART 0x0400 /* setrun() by SIGCONT */ 401*7c478bd9Sstevel@tonic-gate #define TS_PSTART 0x0800 /* setrun() by /proc */ 402*7c478bd9Sstevel@tonic-gate #define TS_RESUME 0x1000 /* setrun() by CPR resume process */ 403*7c478bd9Sstevel@tonic-gate #define TS_CREATE 0x2000 /* setrun() by syslwp_create() */ 404*7c478bd9Sstevel@tonic-gate #define TS_RUNQMATCH 0x4000 /* exact run queue balancing by setbackdq() */ 405*7c478bd9Sstevel@tonic-gate #define TS_ALLSTART \ 406*7c478bd9Sstevel@tonic-gate (TS_CSTART|TS_UNPAUSE|TS_XSTART|TS_PSTART|TS_RESUME|TS_CREATE) 407*7c478bd9Sstevel@tonic-gate 408*7c478bd9Sstevel@tonic-gate /* 409*7c478bd9Sstevel@tonic-gate * No locking needed for AST field. 410*7c478bd9Sstevel@tonic-gate */ 411*7c478bd9Sstevel@tonic-gate #define aston(t) ((t)->t_astflag = 1) 412*7c478bd9Sstevel@tonic-gate #define astoff(t) ((t)->t_astflag = 0) 413*7c478bd9Sstevel@tonic-gate 414*7c478bd9Sstevel@tonic-gate /* True if thread is stopped on an event of interest */ 415*7c478bd9Sstevel@tonic-gate #define ISTOPPED(t) ((t)->t_state == TS_STOPPED && \ 416*7c478bd9Sstevel@tonic-gate !((t)->t_schedflag & TS_PSTART)) 417*7c478bd9Sstevel@tonic-gate 418*7c478bd9Sstevel@tonic-gate /* similar to ISTOPPED except the event of interest is CPR */ 419*7c478bd9Sstevel@tonic-gate #define CPR_ISTOPPED(t) ((t)->t_state == TS_STOPPED && \ 420*7c478bd9Sstevel@tonic-gate !((t)->t_schedflag & TS_RESUME)) 421*7c478bd9Sstevel@tonic-gate 422*7c478bd9Sstevel@tonic-gate /* 423*7c478bd9Sstevel@tonic-gate * True if thread is virtually stopped (is or was asleep in 424*7c478bd9Sstevel@tonic-gate * one of the lwp_*() system calls and marked to stop by /proc.) 425*7c478bd9Sstevel@tonic-gate */ 426*7c478bd9Sstevel@tonic-gate #define VSTOPPED(t) ((t)->t_proc_flag & TP_PRVSTOP) 427*7c478bd9Sstevel@tonic-gate 428*7c478bd9Sstevel@tonic-gate /* similar to VSTOPPED except the point of interest is CPR */ 429*7c478bd9Sstevel@tonic-gate #define CPR_VSTOPPED(t) \ 430*7c478bd9Sstevel@tonic-gate ((t)->t_state == TS_SLEEP && \ 431*7c478bd9Sstevel@tonic-gate (t)->t_wchan0 != NULL && \ 432*7c478bd9Sstevel@tonic-gate ((t)->t_flag & T_WAKEABLE) && \ 433*7c478bd9Sstevel@tonic-gate ((t)->t_proc_flag & TP_CHKPT)) 434*7c478bd9Sstevel@tonic-gate 435*7c478bd9Sstevel@tonic-gate /* True if thread has been stopped by hold*() or was created stopped */ 436*7c478bd9Sstevel@tonic-gate #define SUSPENDED(t) ((t)->t_state == TS_STOPPED && \ 437*7c478bd9Sstevel@tonic-gate ((t)->t_schedflag & (TS_CSTART|TS_UNPAUSE)) != (TS_CSTART|TS_UNPAUSE)) 438*7c478bd9Sstevel@tonic-gate 439*7c478bd9Sstevel@tonic-gate /* True if thread possesses an inherited priority */ 440*7c478bd9Sstevel@tonic-gate #define INHERITED(t) ((t)->t_epri != 0) 441*7c478bd9Sstevel@tonic-gate 442*7c478bd9Sstevel@tonic-gate /* The dispatch priority of a thread */ 443*7c478bd9Sstevel@tonic-gate #define DISP_PRIO(t) ((t)->t_epri > (t)->t_pri ? (t)->t_epri : (t)->t_pri) 444*7c478bd9Sstevel@tonic-gate 445*7c478bd9Sstevel@tonic-gate /* The assigned priority of a thread */ 446*7c478bd9Sstevel@tonic-gate #define ASSIGNED_PRIO(t) ((t)->t_pri) 447*7c478bd9Sstevel@tonic-gate 448*7c478bd9Sstevel@tonic-gate /* 449*7c478bd9Sstevel@tonic-gate * Macros to determine whether a thread can be swapped. 450*7c478bd9Sstevel@tonic-gate * If t_lock is held, the thread is either on a processor or being swapped. 451*7c478bd9Sstevel@tonic-gate */ 452*7c478bd9Sstevel@tonic-gate #define SWAP_OK(t) (!LOCK_HELD(&(t)->t_lock)) 453*7c478bd9Sstevel@tonic-gate 454*7c478bd9Sstevel@tonic-gate /* 455*7c478bd9Sstevel@tonic-gate * proctot(x) 456*7c478bd9Sstevel@tonic-gate * convert a proc pointer to a thread pointer. this only works with 457*7c478bd9Sstevel@tonic-gate * procs that have only one lwp. 458*7c478bd9Sstevel@tonic-gate * 459*7c478bd9Sstevel@tonic-gate * proctolwp(x) 460*7c478bd9Sstevel@tonic-gate * convert a proc pointer to a lwp pointer. this only works with 461*7c478bd9Sstevel@tonic-gate * procs that have only one lwp. 462*7c478bd9Sstevel@tonic-gate * 463*7c478bd9Sstevel@tonic-gate * ttolwp(x) 464*7c478bd9Sstevel@tonic-gate * convert a thread pointer to its lwp pointer. 465*7c478bd9Sstevel@tonic-gate * 466*7c478bd9Sstevel@tonic-gate * ttoproc(x) 467*7c478bd9Sstevel@tonic-gate * convert a thread pointer to its proc pointer. 468*7c478bd9Sstevel@tonic-gate * 469*7c478bd9Sstevel@tonic-gate * ttoproj(x) 470*7c478bd9Sstevel@tonic-gate * convert a thread pointer to its project pointer. 471*7c478bd9Sstevel@tonic-gate * 472*7c478bd9Sstevel@tonic-gate * lwptot(x) 473*7c478bd9Sstevel@tonic-gate * convert a lwp pointer to its thread pointer. 474*7c478bd9Sstevel@tonic-gate * 475*7c478bd9Sstevel@tonic-gate * lwptoproc(x) 476*7c478bd9Sstevel@tonic-gate * convert a lwp to its proc pointer. 477*7c478bd9Sstevel@tonic-gate */ 478*7c478bd9Sstevel@tonic-gate #define proctot(x) ((x)->p_tlist) 479*7c478bd9Sstevel@tonic-gate #define proctolwp(x) ((x)->p_tlist->t_lwp) 480*7c478bd9Sstevel@tonic-gate #define ttolwp(x) ((x)->t_lwp) 481*7c478bd9Sstevel@tonic-gate #define ttoproc(x) ((x)->t_procp) 482*7c478bd9Sstevel@tonic-gate #define ttoproj(x) ((x)->t_proj) 483*7c478bd9Sstevel@tonic-gate #define lwptot(x) ((x)->lwp_thread) 484*7c478bd9Sstevel@tonic-gate #define lwptoproc(x) ((x)->lwp_procp) 485*7c478bd9Sstevel@tonic-gate 486*7c478bd9Sstevel@tonic-gate #define t_pc t_pcb.val[0] 487*7c478bd9Sstevel@tonic-gate #define t_sp t_pcb.val[1] 488*7c478bd9Sstevel@tonic-gate 489*7c478bd9Sstevel@tonic-gate #ifdef _KERNEL 490*7c478bd9Sstevel@tonic-gate 491*7c478bd9Sstevel@tonic-gate extern kthread_t *threadp(void); /* inline, returns thread pointer */ 492*7c478bd9Sstevel@tonic-gate #define curthread (threadp()) /* current thread pointer */ 493*7c478bd9Sstevel@tonic-gate #define curproc (ttoproc(curthread)) /* current process pointer */ 494*7c478bd9Sstevel@tonic-gate #define curproj (ttoproj(curthread)) /* current project pointer */ 495*7c478bd9Sstevel@tonic-gate 496*7c478bd9Sstevel@tonic-gate extern struct _kthread t0; /* the scheduler thread */ 497*7c478bd9Sstevel@tonic-gate extern kmutex_t pidlock; /* global process lock */ 498*7c478bd9Sstevel@tonic-gate 499*7c478bd9Sstevel@tonic-gate /* 500*7c478bd9Sstevel@tonic-gate * thread_free_lock is used by the clock thread to keep a thread 501*7c478bd9Sstevel@tonic-gate * from being freed while it is being examined. 502*7c478bd9Sstevel@tonic-gate */ 503*7c478bd9Sstevel@tonic-gate extern kmutex_t thread_free_lock; 504*7c478bd9Sstevel@tonic-gate 505*7c478bd9Sstevel@tonic-gate /* 506*7c478bd9Sstevel@tonic-gate * Routines to change the priority and effective priority 507*7c478bd9Sstevel@tonic-gate * of a thread-locked thread, whatever its state. 508*7c478bd9Sstevel@tonic-gate */ 509*7c478bd9Sstevel@tonic-gate extern int thread_change_pri(kthread_t *t, pri_t disp_pri, int front); 510*7c478bd9Sstevel@tonic-gate extern void thread_change_epri(kthread_t *t, pri_t disp_pri); 511*7c478bd9Sstevel@tonic-gate 512*7c478bd9Sstevel@tonic-gate /* 513*7c478bd9Sstevel@tonic-gate * Routines that manipulate the dispatcher lock for the thread. 514*7c478bd9Sstevel@tonic-gate * The locking heirarchy is as follows: 515*7c478bd9Sstevel@tonic-gate * cpu_lock > sleepq locks > run queue locks 516*7c478bd9Sstevel@tonic-gate */ 517*7c478bd9Sstevel@tonic-gate void thread_transition(kthread_t *); /* move to transition lock */ 518*7c478bd9Sstevel@tonic-gate void thread_stop(kthread_t *); /* move to stop lock */ 519*7c478bd9Sstevel@tonic-gate void thread_lock(kthread_t *); /* lock thread and its queue */ 520*7c478bd9Sstevel@tonic-gate void thread_lock_high(kthread_t *); /* lock thread and its queue */ 521*7c478bd9Sstevel@tonic-gate void thread_onproc(kthread_t *, struct cpu *); /* set onproc state lock */ 522*7c478bd9Sstevel@tonic-gate 523*7c478bd9Sstevel@tonic-gate #define thread_unlock(t) disp_lock_exit((t)->t_lockp) 524*7c478bd9Sstevel@tonic-gate #define thread_unlock_high(t) disp_lock_exit_high((t)->t_lockp) 525*7c478bd9Sstevel@tonic-gate #define thread_unlock_nopreempt(t) disp_lock_exit_nopreempt((t)->t_lockp) 526*7c478bd9Sstevel@tonic-gate 527*7c478bd9Sstevel@tonic-gate #define THREAD_LOCK_HELD(t) (DISP_LOCK_HELD((t)->t_lockp)) 528*7c478bd9Sstevel@tonic-gate 529*7c478bd9Sstevel@tonic-gate extern disp_lock_t transition_lock; /* lock protecting transiting threads */ 530*7c478bd9Sstevel@tonic-gate extern disp_lock_t stop_lock; /* lock protecting stopped threads */ 531*7c478bd9Sstevel@tonic-gate 532*7c478bd9Sstevel@tonic-gate caddr_t thread_stk_init(caddr_t); /* init thread stack */ 533*7c478bd9Sstevel@tonic-gate 534*7c478bd9Sstevel@tonic-gate #endif /* _KERNEL */ 535*7c478bd9Sstevel@tonic-gate 536*7c478bd9Sstevel@tonic-gate /* 537*7c478bd9Sstevel@tonic-gate * Macros to indicate that the thread holds resources that could be critical 538*7c478bd9Sstevel@tonic-gate * to other kernel threads, so this thread needs to have kernel priority 539*7c478bd9Sstevel@tonic-gate * if it blocks or is preempted. Note that this is not necessary if the 540*7c478bd9Sstevel@tonic-gate * resource is a mutex or a writer lock because of priority inheritance. 541*7c478bd9Sstevel@tonic-gate * 542*7c478bd9Sstevel@tonic-gate * The only way one thread may legally manipulate another thread's t_kpri_req 543*7c478bd9Sstevel@tonic-gate * is to hold the target thread's thread lock while that thread is asleep. 544*7c478bd9Sstevel@tonic-gate * (The rwlock code does this to implement direct handoff to waiting readers.) 545*7c478bd9Sstevel@tonic-gate */ 546*7c478bd9Sstevel@tonic-gate #define THREAD_KPRI_REQUEST() (curthread->t_kpri_req++) 547*7c478bd9Sstevel@tonic-gate #define THREAD_KPRI_RELEASE() (curthread->t_kpri_req--) 548*7c478bd9Sstevel@tonic-gate #define THREAD_KPRI_RELEASE_N(n) (curthread->t_kpri_req -= (n)) 549*7c478bd9Sstevel@tonic-gate 550*7c478bd9Sstevel@tonic-gate /* 551*7c478bd9Sstevel@tonic-gate * Macro to change a thread's priority. 552*7c478bd9Sstevel@tonic-gate */ 553*7c478bd9Sstevel@tonic-gate #define THREAD_CHANGE_PRI(t, pri) { \ 554*7c478bd9Sstevel@tonic-gate pri_t __new_pri = (pri); \ 555*7c478bd9Sstevel@tonic-gate DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, __new_pri); \ 556*7c478bd9Sstevel@tonic-gate (t)->t_pri = __new_pri; \ 557*7c478bd9Sstevel@tonic-gate } 558*7c478bd9Sstevel@tonic-gate 559*7c478bd9Sstevel@tonic-gate /* 560*7c478bd9Sstevel@tonic-gate * Macro to indicate that a thread's priority is about to be changed. 561*7c478bd9Sstevel@tonic-gate */ 562*7c478bd9Sstevel@tonic-gate #define THREAD_WILLCHANGE_PRI(t, pri) { \ 563*7c478bd9Sstevel@tonic-gate DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, (pri)); \ 564*7c478bd9Sstevel@tonic-gate } 565*7c478bd9Sstevel@tonic-gate 566*7c478bd9Sstevel@tonic-gate /* 567*7c478bd9Sstevel@tonic-gate * Macros to change thread state and the associated lock. 568*7c478bd9Sstevel@tonic-gate */ 569*7c478bd9Sstevel@tonic-gate #define THREAD_SET_STATE(tp, state, lp) \ 570*7c478bd9Sstevel@tonic-gate ((tp)->t_state = state, (tp)->t_lockp = lp) 571*7c478bd9Sstevel@tonic-gate 572*7c478bd9Sstevel@tonic-gate /* 573*7c478bd9Sstevel@tonic-gate * Point it at the transition lock, which is always held. 574*7c478bd9Sstevel@tonic-gate * The previosly held lock is dropped. 575*7c478bd9Sstevel@tonic-gate */ 576*7c478bd9Sstevel@tonic-gate #define THREAD_TRANSITION(tp) thread_transition(tp); 577*7c478bd9Sstevel@tonic-gate /* 578*7c478bd9Sstevel@tonic-gate * Set the thread's lock to be the transition lock, without dropping 579*7c478bd9Sstevel@tonic-gate * previosly held lock. 580*7c478bd9Sstevel@tonic-gate */ 581*7c478bd9Sstevel@tonic-gate #define THREAD_TRANSITION_NOLOCK(tp) ((tp)->t_lockp = &transition_lock) 582*7c478bd9Sstevel@tonic-gate 583*7c478bd9Sstevel@tonic-gate /* 584*7c478bd9Sstevel@tonic-gate * Put thread in run state, and set the lock pointer to the dispatcher queue 585*7c478bd9Sstevel@tonic-gate * lock pointer provided. This lock should be held. 586*7c478bd9Sstevel@tonic-gate */ 587*7c478bd9Sstevel@tonic-gate #define THREAD_RUN(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp) 588*7c478bd9Sstevel@tonic-gate 589*7c478bd9Sstevel@tonic-gate /* 590*7c478bd9Sstevel@tonic-gate * Put thread in run state, and set the lock pointer to the dispatcher queue 591*7c478bd9Sstevel@tonic-gate * lock pointer provided (i.e., the "swapped_lock"). This lock should be held. 592*7c478bd9Sstevel@tonic-gate */ 593*7c478bd9Sstevel@tonic-gate #define THREAD_SWAP(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp) 594*7c478bd9Sstevel@tonic-gate 595*7c478bd9Sstevel@tonic-gate /* 596*7c478bd9Sstevel@tonic-gate * Put the thread in zombie state and set the lock pointer to NULL. 597*7c478bd9Sstevel@tonic-gate * The NULL will catch anything that tries to lock a zombie. 598*7c478bd9Sstevel@tonic-gate */ 599*7c478bd9Sstevel@tonic-gate #define THREAD_ZOMB(tp) THREAD_SET_STATE(tp, TS_ZOMB, NULL) 600*7c478bd9Sstevel@tonic-gate 601*7c478bd9Sstevel@tonic-gate /* 602*7c478bd9Sstevel@tonic-gate * Set the thread into ONPROC state, and point the lock at the CPUs 603*7c478bd9Sstevel@tonic-gate * lock for the onproc thread(s). This lock should be held, so the 604*7c478bd9Sstevel@tonic-gate * thread deoes not become unlocked, since these stores can be reordered. 605*7c478bd9Sstevel@tonic-gate */ 606*7c478bd9Sstevel@tonic-gate #define THREAD_ONPROC(tp, cpu) \ 607*7c478bd9Sstevel@tonic-gate THREAD_SET_STATE(tp, TS_ONPROC, &(cpu)->cpu_thread_lock) 608*7c478bd9Sstevel@tonic-gate 609*7c478bd9Sstevel@tonic-gate /* 610*7c478bd9Sstevel@tonic-gate * Set the thread into the TS_SLEEP state, and set the lock pointer to 611*7c478bd9Sstevel@tonic-gate * to some sleep queue's lock. The new lock should already be held. 612*7c478bd9Sstevel@tonic-gate */ 613*7c478bd9Sstevel@tonic-gate #define THREAD_SLEEP(tp, lp) { \ 614*7c478bd9Sstevel@tonic-gate disp_lock_t *tlp; \ 615*7c478bd9Sstevel@tonic-gate tlp = (tp)->t_lockp; \ 616*7c478bd9Sstevel@tonic-gate THREAD_SET_STATE(tp, TS_SLEEP, lp); \ 617*7c478bd9Sstevel@tonic-gate disp_lock_exit_high(tlp); \ 618*7c478bd9Sstevel@tonic-gate } 619*7c478bd9Sstevel@tonic-gate 620*7c478bd9Sstevel@tonic-gate /* 621*7c478bd9Sstevel@tonic-gate * Interrupt threads are created in TS_FREE state, and their lock 622*7c478bd9Sstevel@tonic-gate * points at the associated CPU's lock. 623*7c478bd9Sstevel@tonic-gate */ 624*7c478bd9Sstevel@tonic-gate #define THREAD_FREEINTR(tp, cpu) \ 625*7c478bd9Sstevel@tonic-gate THREAD_SET_STATE(tp, TS_FREE, &(cpu)->cpu_thread_lock) 626*7c478bd9Sstevel@tonic-gate 627*7c478bd9Sstevel@tonic-gate 628*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 629*7c478bd9Sstevel@tonic-gate } 630*7c478bd9Sstevel@tonic-gate #endif 631*7c478bd9Sstevel@tonic-gate 632*7c478bd9Sstevel@tonic-gate #endif /* _SYS_THREAD_H */ 633