/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2010 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Copyright 2020 Joyent, Inc. */ #ifndef _SYS_THREAD_H #define _SYS_THREAD_H #include <sys/types.h> #include <sys/t_lock.h> #include <sys/klwp.h> #include <sys/time.h> #include <sys/signal.h> #include <sys/kcpc.h> #if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL) #include <asm/thread.h> #endif #ifdef __cplusplus extern "C" { #endif /* * The thread object, its states, and the methods by which it * is accessed. */ /* * Values that t_state may assume. Note that t_state cannot have more * than one of these flags set at a time. */ #define TS_FREE 0x00 /* Thread at loose ends */ #define TS_SLEEP 0x01 /* Awaiting an event */ #define TS_RUN 0x02 /* Runnable, but not yet on a processor */ #define TS_ONPROC 0x04 /* Thread is being run on a processor */ #define TS_ZOMB 0x08 /* Thread has died but hasn't been reaped */ #define TS_STOPPED 0x10 /* Stopped, initial state */ #define TS_WAIT 0x20 /* Waiting to become runnable */ typedef struct ctxop { void (*save_op)(void *); /* function to invoke to save context */ void (*restore_op)(void *); /* function to invoke to restore ctx */ void (*fork_op)(void *, void *); /* invoke to fork context */ void (*lwp_create_op)(void *, void *); /* lwp_create context */ void (*exit_op)(void *); /* invoked during {thread,lwp}_exit() */ void (*free_op)(void *, int); /* function which frees the context */ void *arg; /* argument to above functions, ctx pointer */ struct ctxop *next; /* next context ops */ struct ctxop *prev; /* previous context ops */ hrtime_t save_ts; /* timestamp of last save */ hrtime_t restore_ts; /* timestamp of last restore */ } ctxop_t; /* * The active file descriptor table. * Each member of a_fd[] not equalling -1 represents an active fd. * The structure is initialized on first use; all zeros means uninitialized. */ typedef struct { kmutex_t a_fdlock; /* protects a_fd and a_nfd */ int *a_fd; /* pointer to list of fds */ int a_nfd; /* number of entries in *a_fd */ int a_stale; /* one of the active fds is being closed */ int a_buf[2]; /* buffer to which a_fd initially refers */ } afd_t; /* * An lwpchan provides uniqueness when sleeping on user-level * synchronization primitives. The lc_wchan member is used * for sleeping on kernel synchronization primitives. */ typedef struct { caddr_t lc_wchan0; caddr_t lc_wchan; } lwpchan_t; typedef struct _kthread *kthread_id_t; struct turnstile; struct panic_trap_info; struct upimutex; struct kproject; struct on_trap_data; struct waitq; struct _kcpc_ctx; struct _kcpc_set; /* Definition for kernel thread identifier type */ typedef uint64_t kt_did_t; typedef struct _kthread { struct _kthread *t_link; /* dispq, sleepq, and free queue link */ caddr_t t_stk; /* base of stack (kernel sp value to use) */ void (*t_startpc)(void); /* PC where thread started */ struct cpu *t_bound_cpu; /* cpu bound to, or NULL if not bound */ short t_affinitycnt; /* nesting level of kernel affinity-setting */ short t_bind_cpu; /* user-specified CPU binding (-1 if none) */ uint_t t_flag; /* modified only by current thread */ ushort_t t_proc_flag; /* modified holding ttproc(t)->p_lock */ ushort_t t_schedflag; /* modified holding thread_lock(t) */ volatile char t_preempt; /* don't preempt thread if set */ volatile char t_preempt_lk; uint_t t_state; /* thread state (protected by thread_lock) */ pri_t t_pri; /* assigned thread priority */ pri_t t_epri; /* inherited thread priority */ pri_t t_cpri; /* thread scheduling class priority */ char t_writer; /* sleeping in lwp_rwlock_lock(RW_WRITE_LOCK) */ uchar_t t_bindflag; /* CPU and pset binding type */ label_t t_pcb; /* pcb, save area when switching */ lwpchan_t t_lwpchan; /* reason for blocking */ #define t_wchan0 t_lwpchan.lc_wchan0 #define t_wchan t_lwpchan.lc_wchan struct _sobj_ops *t_sobj_ops; id_t t_cid; /* scheduling class id */ struct thread_ops *t_clfuncs; /* scheduling class ops vector */ void *t_cldata; /* per scheduling class specific data */ ctxop_t *t_ctx; /* thread context */ uintptr_t t_lofault; /* ret pc for failed page faults */ label_t *t_onfault; /* on_fault() setjmp buf */ struct on_trap_data *t_ontrap; /* on_trap() protection data */ caddr_t t_swap; /* the bottom of the stack, if from segkp */ lock_t t_lock; /* used to resume() a thread */ uint8_t t_lockstat; /* set while thread is in lockstat code */ uint8_t t_pil; /* interrupt thread PIL */ disp_lock_t t_pi_lock; /* lock protecting t_prioinv list */ char t_nomigrate; /* do not migrate if set */ struct cpu *t_cpu; /* CPU that thread last ran on */ struct cpu *t_weakbound_cpu; /* cpu weakly bound to */ struct lgrp_ld *t_lpl; /* load average for home lgroup */ void *t_lgrp_reserv[2]; /* reserved for future */ struct _kthread *t_intr; /* interrupted (pinned) thread */ uint64_t t_intr_start; /* timestamp when time slice began */ kt_did_t t_did; /* thread id for kernel debuggers */ struct _kcpc_ctx *t_cpc_ctx; /* performance counter context */ struct _kcpc_set *t_cpc_set; /* set this thread has bound */ /* * non swappable part of the lwp state. */ id_t t_tid; /* lwp's id */ id_t t_waitfor; /* target lwp id in lwp_wait() */ struct sigqueue *t_sigqueue; /* queue of siginfo structs */ k_sigset_t t_sig; /* signals pending to this process */ k_sigset_t t_extsig; /* signals sent from another contract */ k_sigset_t t_hold; /* hold signal bit mask */ k_sigset_t t_sigwait; /* sigtimedwait/sigfd accepting these */ struct _kthread *t_forw; /* process's forward thread link */ struct _kthread *t_back; /* process's backward thread link */ struct _kthread *t_thlink; /* tid (lwpid) lookup hash link */ klwp_t *t_lwp; /* thread's lwp pointer */ struct proc *t_procp; /* proc pointer */ struct t_audit_data *t_audit_data; /* per thread audit data */ struct _kthread *t_next; /* doubly linked list of all threads */ struct _kthread *t_prev; ushort_t t_whystop; /* reason for stopping */ ushort_t t_whatstop; /* more detailed reason */ int t_dslot; /* index in proc's thread directory */ struct pollstate *t_pollstate; /* state used during poll(2) */ struct pollcache *t_pollcache; /* to pass a pcache ptr by /dev/poll */ struct cred *t_cred; /* pointer to current cred */ time_t t_start; /* start time, seconds since epoch */ clock_t t_lbolt; /* lbolt at last clock_tick() */ hrtime_t t_stoptime; /* timestamp at stop() */ uint_t t_pctcpu; /* %cpu at last clock_tick(), binary */ /* point at right of high-order bit */ short t_sysnum; /* system call number */ kcondvar_t t_delay_cv; kmutex_t t_delay_lock; /* * Pointer to the dispatcher lock protecting t_state and state-related * flags. This pointer can change during waits on the lock, so * it should be grabbed only by thread_lock(). */ disp_lock_t *t_lockp; /* pointer to the dispatcher lock */ ushort_t t_oldspl; /* spl level before dispatcher locked */ volatile char t_pre_sys; /* pre-syscall work needed */ lock_t t_lock_flush; /* for lock_mutex_flush() impl */ struct _disp *t_disp_queue; /* run queue for chosen CPU */ clock_t t_disp_time; /* last time this thread was running */ /* * Post-syscall / post-trap flags. * No lock is required to set these. * These must be cleared only by the thread itself. * * t_astflag indicates that some post-trap processing is required, * possibly a signal or a preemption. The thread will not * return to user with this set. * t_post_sys indicates that some unusualy post-system call * handling is required, such as an error or tracing. * t_sig_check indicates that some condition in ISSIG() must be * checked, but doesn't prevent returning to user. * t_post_sys_ast is a way of checking whether any of these three * flags are set. */ union __tu { struct __ts { volatile char _t_astflag; /* AST requested */ volatile char _t_sig_check; /* ISSIG required */ volatile char _t_post_sys; /* post_syscall req */ volatile char _t_trapret; /* call CL_TRAPRET */ } _ts; volatile int _t_post_sys_ast; /* OR of these flags */ } _tu; #define t_astflag _tu._ts._t_astflag #define t_sig_check _tu._ts._t_sig_check #define t_post_sys _tu._ts._t_post_sys #define t_trapret _tu._ts._t_trapret #define t_post_sys_ast _tu._t_post_sys_ast /* * Real time microstate profiling. */ /* possible 4-byte filler */ hrtime_t t_waitrq; /* timestamp for run queue wait time */ int t_mstate; /* current microstate */ struct rprof { int rp_anystate; /* set if any state non-zero */ uint_t rp_state[NMSTATES]; /* mstate profiling counts */ } *t_rprof; /* * There is a turnstile inserted into the list below for * every priority inverted synchronization object that * this thread holds. */ struct turnstile *t_prioinv; /* * Pointer to the turnstile attached to the synchronization * object where this thread is blocked. */ struct turnstile *t_ts; /* * kernel thread specific data * Borrowed from userland implementation of POSIX tsd */ struct tsd_thread { struct tsd_thread *ts_next; /* threads with TSD */ struct tsd_thread *ts_prev; /* threads with TSD */ uint_t ts_nkeys; /* entries in value array */ void **ts_value; /* array of value/key */ } *t_tsd; clock_t t_stime; /* time stamp used by the swapper */ struct door_data *t_door; /* door invocation data */ kmutex_t *t_plockp; /* pointer to process's p_lock */ struct sc_shared *t_schedctl; /* scheduler activations shared data */ uintptr_t t_sc_uaddr; /* user-level address of shared data */ struct cpupart *t_cpupart; /* partition containing thread */ int t_bind_pset; /* processor set binding */ struct copyops *t_copyops; /* copy in/out ops vector */ caddr_t t_stkbase; /* base of the the stack */ struct page *t_red_pp; /* if non-NULL, redzone is mapped */ afd_t t_activefd; /* active file descriptor table */ struct _kthread *t_priforw; /* sleepq per-priority sublist */ struct _kthread *t_priback; struct sleepq *t_sleepq; /* sleep queue thread is waiting on */ struct panic_trap_info *t_panic_trap; /* saved data from fatal trap */ int *t_lgrp_affinity; /* lgroup affinity */ struct upimutex *t_upimutex; /* list of upimutexes owned by thread */ uint32_t t_nupinest; /* number of nested held upi mutexes */ struct kproject *t_proj; /* project containing this thread */ uint8_t t_unpark; /* modified holding t_delay_lock */ uint8_t t_release; /* lwp_release() waked up the thread */ uint8_t t_hatdepth; /* depth of recursive hat_memloads */ uint8_t t_xpvcntr; /* see xen_block_migrate() */ kcondvar_t t_joincv; /* cv used to wait for thread exit */ void *t_taskq; /* for threads belonging to taskq */ hrtime_t t_anttime; /* most recent time anticipatory load */ /* was added to an lgroup's load */ /* on this thread's behalf */ char *t_pdmsg; /* privilege debugging message */ uint_t t_predcache; /* DTrace predicate cache */ hrtime_t t_dtrace_vtime; /* DTrace virtual time */ hrtime_t t_dtrace_start; /* DTrace slice start time */ uint8_t t_dtrace_stop; /* indicates a DTrace-desired stop */ uint8_t t_dtrace_sig; /* signal sent via DTrace's raise() */ union __tdu { struct __tds { uint8_t _t_dtrace_on; /* hit a fasttrap tracepoint */ uint8_t _t_dtrace_step; /* about to return to kernel */ uint8_t _t_dtrace_ret; /* handling a return probe */ uint8_t _t_dtrace_ast; /* saved ast flag */ #ifdef __amd64 uint8_t _t_dtrace_reg; /* modified register */ #endif } _tds; ulong_t _t_dtrace_ft; /* bitwise or of these flags */ } _tdu; #define t_dtrace_ft _tdu._t_dtrace_ft #define t_dtrace_on _tdu._tds._t_dtrace_on #define t_dtrace_step _tdu._tds._t_dtrace_step #define t_dtrace_ret _tdu._tds._t_dtrace_ret #define t_dtrace_ast _tdu._tds._t_dtrace_ast #ifdef __amd64 #define t_dtrace_reg _tdu._tds._t_dtrace_reg #endif uintptr_t t_dtrace_pc; /* DTrace saved pc from fasttrap */ uintptr_t t_dtrace_npc; /* DTrace next pc from fasttrap */ uintptr_t t_dtrace_scrpc; /* DTrace per-thread scratch location */ uintptr_t t_dtrace_astpc; /* DTrace return sequence location */ #ifdef __amd64 uint64_t t_dtrace_regv; /* DTrace saved reg from fasttrap */ uint64_t t_useracc; /* SMAP state saved across swtch() */ #endif hrtime_t t_hrtime; /* high-res last time on cpu */ kmutex_t t_ctx_lock; /* protects t_ctx in removectx() */ struct waitq *t_waitq; /* wait queue */ kmutex_t t_wait_mutex; /* used in CV wait functions */ char *t_name; /* thread name */ uint64_t t_unsafe; /* unsafe to run with SMT VCPU thread */ } kthread_t; /* * Thread flag (t_flag) definitions. * These flags must be changed only for the current thread, * and not during preemption code, since the code being * preempted could be modifying the flags. * * For the most part these flags do not need locking. * The following flags will only be changed while the thread_lock is held, * to give assurrance that they are consistent with t_state: * T_WAKEABLE */ #define T_INTR_THREAD 0x0001 /* thread is an interrupt thread */ #define T_WAKEABLE 0x0002 /* thread is blocked, signals enabled */ #define T_TOMASK 0x0004 /* use lwp_sigoldmask on return from signal */ #define T_TALLOCSTK 0x0008 /* thread structure allocated from stk */ #define T_FORKALL 0x0010 /* thread was cloned by forkall() */ #define T_WOULDBLOCK 0x0020 /* for lockfs */ #define T_DONTBLOCK 0x0040 /* for lockfs */ #define T_DONTPEND 0x0080 /* for lockfs */ #define T_SYS_PROF 0x0100 /* profiling on for duration of system call */ #define T_WAITCVSEM 0x0200 /* waiting for a lwp_cv or lwp_sema on sleepq */ #define T_WATCHPT 0x0400 /* thread undergoing a watchpoint emulation */ #define T_PANIC 0x0800 /* thread initiated a system panic */ #define T_LWPREUSE 0x1000 /* stack and LWP can be reused */ #define T_CAPTURING 0x2000 /* thread is in page capture logic */ #define T_VFPARENT 0x4000 /* thread is vfork parent, must call vfwait */ #define T_DONTDTRACE 0x8000 /* disable DTrace probes */ #define T_KFPU 0x10000 /* kernel FPU active */ #define T_PUSHPAGE 0x20000 /* this thread may be assisting pageout */ /* * Flags in t_proc_flag. * These flags must be modified only when holding the p_lock * for the associated process. */ #define TP_DAEMON 0x0001 /* this is an LWP_DAEMON lwp */ #define TP_HOLDLWP 0x0002 /* hold thread's lwp */ #define TP_TWAIT 0x0004 /* wait to be freed by lwp_wait() */ #define TP_LWPEXIT 0x0008 /* lwp has exited */ #define TP_PRSTOP 0x0010 /* thread is being stopped via /proc */ #define TP_CHKPT 0x0020 /* thread is being stopped via CPR checkpoint */ #define TP_EXITLWP 0x0040 /* terminate this lwp */ #define TP_PRVSTOP 0x0080 /* thread is virtually stopped via /proc */ #define TP_MSACCT 0x0100 /* collect micro-state accounting information */ #define TP_STOPPING 0x0200 /* thread is executing stop() */ #define TP_WATCHPT 0x0400 /* process has watchpoints in effect */ #define TP_PAUSE 0x0800 /* process is being stopped via pauselwps() */ #define TP_CHANGEBIND 0x1000 /* thread has a new cpu/cpupart binding */ #define TP_ZTHREAD 0x2000 /* this is a kernel thread for a zone */ #define TP_WATCHSTOP 0x4000 /* thread is stopping via holdwatch() */ #define TP_KTHREAD 0x8000 /* in-kernel worker thread for a process */ /* * Thread scheduler flag (t_schedflag) definitions. * The thread must be locked via thread_lock() or equiv. to change these. */ #define TS_LOAD 0x0001 /* thread is in memory */ #define TS_DONT_SWAP 0x0002 /* thread/lwp should not be swapped */ #define TS_SWAPENQ 0x0004 /* swap thread when it reaches a safe point */ #define TS_ON_SWAPQ 0x0008 /* thread is on the swap queue */ #define TS_SIGNALLED 0x0010 /* thread was awakened by cv_signal() */ #define TS_PROJWAITQ 0x0020 /* thread is on its project's waitq */ #define TS_ZONEWAITQ 0x0040 /* thread is on its zone's waitq */ #define TS_VCPU 0x0080 /* thread will enter guest context */ #define TS_CSTART 0x0100 /* setrun() by continuelwps() */ #define TS_UNPAUSE 0x0200 /* setrun() by unpauselwps() */ #define TS_XSTART 0x0400 /* setrun() by SIGCONT */ #define TS_PSTART 0x0800 /* setrun() by /proc */ #define TS_RESUME 0x1000 /* setrun() by CPR resume process */ #define TS_CREATE 0x2000 /* setrun() by syslwp_create() */ #define TS_RUNQMATCH 0x4000 /* exact run queue balancing by setbackdq() */ #define TS_ALLSTART \ (TS_CSTART|TS_UNPAUSE|TS_XSTART|TS_PSTART|TS_RESUME|TS_CREATE) #define TS_ANYWAITQ (TS_PROJWAITQ|TS_ZONEWAITQ) /* * Thread binding types */ #define TB_ALLHARD 0 #define TB_CPU_SOFT 0x01 /* soft binding to CPU */ #define TB_PSET_SOFT 0x02 /* soft binding to pset */ #define TB_CPU_SOFT_SET(t) ((t)->t_bindflag |= TB_CPU_SOFT) #define TB_CPU_HARD_SET(t) ((t)->t_bindflag &= ~TB_CPU_SOFT) #define TB_PSET_SOFT_SET(t) ((t)->t_bindflag |= TB_PSET_SOFT) #define TB_PSET_HARD_SET(t) ((t)->t_bindflag &= ~TB_PSET_SOFT) #define TB_CPU_IS_SOFT(t) ((t)->t_bindflag & TB_CPU_SOFT) #define TB_CPU_IS_HARD(t) (!TB_CPU_IS_SOFT(t)) #define TB_PSET_IS_SOFT(t) ((t)->t_bindflag & TB_PSET_SOFT) /* * No locking needed for AST field. */ #define aston(t) ((t)->t_astflag = 1) #define astoff(t) ((t)->t_astflag = 0) /* True if thread is stopped on an event of interest */ #define ISTOPPED(t) ((t)->t_state == TS_STOPPED && \ !((t)->t_schedflag & TS_PSTART)) /* True if thread is asleep and wakeable */ #define ISWAKEABLE(t) (((t)->t_state == TS_SLEEP && \ ((t)->t_flag & T_WAKEABLE))) /* True if thread is on the wait queue */ #define ISWAITING(t) ((t)->t_state == TS_WAIT) /* similar to ISTOPPED except the event of interest is CPR */ #define CPR_ISTOPPED(t) ((t)->t_state == TS_STOPPED && \ !((t)->t_schedflag & TS_RESUME)) /* * True if thread is virtually stopped (is or was asleep in * one of the lwp_*() system calls and marked to stop by /proc.) */ #define VSTOPPED(t) ((t)->t_proc_flag & TP_PRVSTOP) /* similar to VSTOPPED except the point of interest is CPR */ #define CPR_VSTOPPED(t) \ ((t)->t_state == TS_SLEEP && \ (t)->t_wchan0 != NULL && \ ((t)->t_flag & T_WAKEABLE) && \ ((t)->t_proc_flag & TP_CHKPT)) /* True if thread has been stopped by hold*() or was created stopped */ #define SUSPENDED(t) ((t)->t_state == TS_STOPPED && \ ((t)->t_schedflag & (TS_CSTART|TS_UNPAUSE)) != (TS_CSTART|TS_UNPAUSE)) /* True if thread possesses an inherited priority */ #define INHERITED(t) ((t)->t_epri != 0) /* The dispatch priority of a thread */ #define DISP_PRIO(t) ((t)->t_epri > (t)->t_pri ? (t)->t_epri : (t)->t_pri) /* The assigned priority of a thread */ #define ASSIGNED_PRIO(t) ((t)->t_pri) /* * Macros to determine whether a thread can be swapped. * If t_lock is held, the thread is either on a processor or being swapped. */ #define SWAP_OK(t) (!LOCK_HELD(&(t)->t_lock)) /* * proctot(x) * convert a proc pointer to a thread pointer. this only works with * procs that have only one lwp. * * proctolwp(x) * convert a proc pointer to a lwp pointer. this only works with * procs that have only one lwp. * * ttolwp(x) * convert a thread pointer to its lwp pointer. * * ttoproc(x) * convert a thread pointer to its proc pointer. * * ttoproj(x) * convert a thread pointer to its project pointer. * * ttozone(x) * convert a thread pointer to its zone pointer. * * lwptot(x) * convert a lwp pointer to its thread pointer. * * lwptoproc(x) * convert a lwp to its proc pointer. */ #define proctot(x) ((x)->p_tlist) #define proctolwp(x) ((x)->p_tlist->t_lwp) #define ttolwp(x) ((x)->t_lwp) #define ttoproc(x) ((x)->t_procp) #define ttoproj(x) ((x)->t_proj) #define ttozone(x) ((x)->t_procp->p_zone) #define lwptot(x) ((x)->lwp_thread) #define lwptoproc(x) ((x)->lwp_procp) #define t_pc t_pcb.val[0] #define t_sp t_pcb.val[1] #ifdef _KERNEL extern kthread_t *threadp(void); /* inline, returns thread pointer */ #define curthread (threadp()) /* current thread pointer */ #define curproc (ttoproc(curthread)) /* current process pointer */ #define curproj (ttoproj(curthread)) /* current project pointer */ #define curzone (curproc->p_zone) /* current zone pointer */ extern struct _kthread t0; /* the scheduler thread */ extern kmutex_t pidlock; /* global process lock */ /* * thread_free_lock is used by the tick accounting thread to keep a thread * from being freed while it is being examined. * * Thread structures are 32-byte aligned structures. That is why we use the * following formula. */ #define THREAD_FREE_BITS 10 #define THREAD_FREE_NUM (1 << THREAD_FREE_BITS) #define THREAD_FREE_MASK (THREAD_FREE_NUM - 1) #define THREAD_FREE_1 PTR24_LSB #define THREAD_FREE_2 (PTR24_LSB + THREAD_FREE_BITS) #define THREAD_FREE_SHIFT(t) \ (((ulong_t)(t) >> THREAD_FREE_1) ^ ((ulong_t)(t) >> THREAD_FREE_2)) #define THREAD_FREE_HASH(t) (THREAD_FREE_SHIFT(t) & THREAD_FREE_MASK) typedef struct thread_free_lock { kmutex_t tf_lock; uchar_t tf_pad[64 - sizeof (kmutex_t)]; } thread_free_lock_t; extern void thread_free_prevent(kthread_t *); extern void thread_free_allow(kthread_t *); /* * Routines to change the priority and effective priority * of a thread-locked thread, whatever its state. */ extern int thread_change_pri(kthread_t *t, pri_t disp_pri, int front); extern void thread_change_epri(kthread_t *t, pri_t disp_pri); /* * Routines that manipulate the dispatcher lock for the thread. * The locking heirarchy is as follows: * cpu_lock > sleepq locks > run queue locks */ void thread_transition(kthread_t *); /* move to transition lock */ void thread_stop(kthread_t *); /* move to stop lock */ void thread_lock(kthread_t *); /* lock thread and its queue */ void thread_lock_high(kthread_t *); /* lock thread and its queue */ void thread_onproc(kthread_t *, struct cpu *); /* set onproc state lock */ #define thread_unlock(t) disp_lock_exit((t)->t_lockp) #define thread_unlock_high(t) disp_lock_exit_high((t)->t_lockp) #define thread_unlock_nopreempt(t) disp_lock_exit_nopreempt((t)->t_lockp) #define THREAD_LOCK_HELD(t) (DISP_LOCK_HELD((t)->t_lockp)) extern disp_lock_t transition_lock; /* lock protecting transiting threads */ extern disp_lock_t stop_lock; /* lock protecting stopped threads */ caddr_t thread_stk_init(caddr_t); /* init thread stack */ int thread_setname(kthread_t *, const char *); int thread_vsetname(kthread_t *, const char *, ...); extern int default_binding_mode; extern int default_stksize; #endif /* _KERNEL */ #define THREAD_NAME_MAX 32 /* includes terminating NUL */ /* * Macro to change a thread's priority. */ #define THREAD_CHANGE_PRI(t, pri) { \ pri_t __new_pri = (pri); \ DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, __new_pri); \ (t)->t_pri = __new_pri; \ schedctl_set_cidpri(t); \ } /* * Macro to indicate that a thread's priority is about to be changed. */ #define THREAD_WILLCHANGE_PRI(t, pri) { \ DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, (pri)); \ } /* * Macros to change thread state and the associated lock. */ #define THREAD_SET_STATE(tp, state, lp) \ ((tp)->t_state = state, (tp)->t_lockp = lp) /* * Point it at the transition lock, which is always held. * The previosly held lock is dropped. */ #define THREAD_TRANSITION(tp) thread_transition(tp); /* * Set the thread's lock to be the transition lock, without dropping * previosly held lock. */ #define THREAD_TRANSITION_NOLOCK(tp) ((tp)->t_lockp = &transition_lock) /* * Put thread in run state, and set the lock pointer to the dispatcher queue * lock pointer provided. This lock should be held. */ #define THREAD_RUN(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp) /* * Put thread in wait state, and set the lock pointer to the wait queue * lock pointer provided. This lock should be held. */ #define THREAD_WAIT(tp, lp) THREAD_SET_STATE(tp, TS_WAIT, lp) /* * Put thread in run state, and set the lock pointer to the dispatcher queue * lock pointer provided (i.e., the "swapped_lock"). This lock should be held. */ #define THREAD_SWAP(tp, lp) THREAD_SET_STATE(tp, TS_RUN, lp) /* * Put the thread in zombie state and set the lock pointer to NULL. * The NULL will catch anything that tries to lock a zombie. */ #define THREAD_ZOMB(tp) THREAD_SET_STATE(tp, TS_ZOMB, NULL) /* * Set the thread into ONPROC state, and point the lock at the CPUs * lock for the onproc thread(s). This lock should be held, so the * thread deoes not become unlocked, since these stores can be reordered. */ #define THREAD_ONPROC(tp, cpu) \ THREAD_SET_STATE(tp, TS_ONPROC, &(cpu)->cpu_thread_lock) /* * Set the thread into the TS_SLEEP state, and set the lock pointer to * to some sleep queue's lock. The new lock should already be held. */ #define THREAD_SLEEP(tp, lp) { \ disp_lock_t *tlp; \ tlp = (tp)->t_lockp; \ THREAD_SET_STATE(tp, TS_SLEEP, lp); \ disp_lock_exit_high(tlp); \ } /* * Interrupt threads are created in TS_FREE state, and their lock * points at the associated CPU's lock. */ #define THREAD_FREEINTR(tp, cpu) \ THREAD_SET_STATE(tp, TS_FREE, &(cpu)->cpu_thread_lock) /* if tunable kmem_stackinfo is set, fill kthread stack with a pattern */ #define KMEM_STKINFO_PATTERN 0xbadcbadcbadcbadcULL /* * If tunable kmem_stackinfo is set, log the latest KMEM_LOG_STK_USAGE_SIZE * dead kthreads that used their kernel stack the most. */ #define KMEM_STKINFO_LOG_SIZE 16 /* kthread name (cmd/lwpid) string size in the stackinfo log */ #define KMEM_STKINFO_STR_SIZE 64 /* * stackinfo logged data. */ typedef struct kmem_stkinfo { caddr_t kthread; /* kthread pointer */ caddr_t t_startpc; /* where kthread started */ caddr_t start; /* kthread stack start address */ size_t stksz; /* kthread stack size */ size_t percent; /* kthread stack high water mark */ id_t t_tid; /* kthread id */ char cmd[KMEM_STKINFO_STR_SIZE]; /* kthread name (cmd/lwpid) */ } kmem_stkinfo_t; #ifdef __cplusplus } #endif #endif /* _SYS_THREAD_H */
