mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
- Add a td_pflags field to struct thread for private flags accessed only by
curthread. Unlike td_flags, this field does not need any locking. - Replace the td_inktr and td_inktrace variables with equivalent private thread flags. - Move TDF_OLDMASK over to the private flags field so it no longer requires sched_lock.
This commit is contained in:
John Baldwin
parent
b981655c08
commit
5e26dcb560
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=116101
@ -188,9 +188,9 @@ ktr_tracepoint(u_int mask, const char *file, int line, const char *format,
|
||||
return;
|
||||
#if defined(KTR_VERBOSE) || defined(KTR_ALQ)
|
||||
td = curthread;
|
||||
if (td->td_inktr)
|
||||
if (td->td_pflags & TDP_INKTR)
|
||||
return;
|
||||
td->td_inktr++;
|
||||
td->td_pflags |= TDP_INKTR;
|
||||
#endif
|
||||
#ifdef KTR_ALQ
|
||||
if (ktr_alq_enabled &&
|
||||
@ -247,7 +247,7 @@ ktr_tracepoint(u_int mask, const char *file, int line, const char *format,
|
||||
done:
|
||||
#endif
|
||||
#if defined(KTR_VERBOSE) || defined(KTR_ALQ)
|
||||
td->td_inktr--;
|
||||
td->td_pflags &= ~TDP_INKTR;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
@ -157,12 +157,12 @@ sysctl_kern_ktrace_request_pool(SYSCTL_HANDLER_ARGS)
|
||||
if (error)
|
||||
return (error);
|
||||
td = curthread;
|
||||
td->td_inktrace = 1;
|
||||
td->td_pflags |= TDP_INKTRACE;
|
||||
mtx_lock(&ktrace_mtx);
|
||||
oldsize = ktr_requestpool;
|
||||
newsize = ktrace_resize_pool(wantsize);
|
||||
mtx_unlock(&ktrace_mtx);
|
||||
td->td_inktrace = 0;
|
||||
td->td_pflags &= ~TDP_INKTRACE;
|
||||
error = SYSCTL_OUT(req, &oldsize, sizeof(uint));
|
||||
if (error)
|
||||
return (error);
|
||||
@ -215,11 +215,11 @@ ktr_getrequest(int type)
|
||||
struct proc *p = td->td_proc;
|
||||
int pm;
|
||||
|
||||
td->td_inktrace = 1;
|
||||
td->td_pflags |= TDP_INKTRACE;
|
||||
mtx_lock(&ktrace_mtx);
|
||||
if (!KTRCHECK(td, type)) {
|
||||
mtx_unlock(&ktrace_mtx);
|
||||
td->td_inktrace = 0;
|
||||
td->td_pflags &= ~TDP_INKTRACE;
|
||||
return (NULL);
|
||||
}
|
||||
req = STAILQ_FIRST(&ktr_free);
|
||||
@ -248,7 +248,7 @@ ktr_getrequest(int type)
|
||||
mtx_unlock(&ktrace_mtx);
|
||||
if (pm)
|
||||
printf("Out of ktrace request objects.\n");
|
||||
td->td_inktrace = 0;
|
||||
td->td_pflags &= ~TDP_INKTRACE;
|
||||
}
|
||||
return (req);
|
||||
}
|
||||
@ -261,7 +261,7 @@ ktr_submitrequest(struct ktr_request *req)
|
||||
STAILQ_INSERT_TAIL(&ktr_todo, req, ktr_list);
|
||||
sema_post(&ktrace_sema);
|
||||
mtx_unlock(&ktrace_mtx);
|
||||
curthread->td_inktrace = 0;
|
||||
curthread->td_pflags &= ~TDP_INKTRACE;
|
||||
}
|
||||
|
||||
static void
|
||||
@ -514,7 +514,7 @@ ktrace(td, uap)
|
||||
if (ops != KTROP_CLEARFILE && facs == 0)
|
||||
return (EINVAL);
|
||||
|
||||
td->td_inktrace = 1;
|
||||
td->td_pflags |= TDP_INKTRACE;
|
||||
if (ops != KTROP_CLEAR) {
|
||||
/*
|
||||
* an operation which requires a file argument.
|
||||
@ -525,7 +525,7 @@ ktrace(td, uap)
|
||||
error = vn_open(&nd, &flags, 0);
|
||||
if (error) {
|
||||
mtx_unlock(&Giant);
|
||||
td->td_inktrace = 0;
|
||||
td->td_pflags &= ~TDP_INKTRACE;
|
||||
return (error);
|
||||
}
|
||||
NDFREE(&nd, NDF_ONLY_PNBUF);
|
||||
@ -534,7 +534,7 @@ ktrace(td, uap)
|
||||
if (vp->v_type != VREG) {
|
||||
(void) vn_close(vp, FREAD|FWRITE, td->td_ucred, td);
|
||||
mtx_unlock(&Giant);
|
||||
td->td_inktrace = 0;
|
||||
td->td_pflags &= ~TDP_INKTRACE;
|
||||
return (EACCES);
|
||||
}
|
||||
mtx_unlock(&Giant);
|
||||
@ -623,7 +623,7 @@ ktrace(td, uap)
|
||||
(void) vn_close(vp, FWRITE, td->td_ucred, td);
|
||||
mtx_unlock(&Giant);
|
||||
}
|
||||
td->td_inktrace = 0;
|
||||
td->td_pflags &= ~TDP_INKTRACE;
|
||||
return (error);
|
||||
#else /* !KTRACE */
|
||||
return (ENOSYS);
|
||||
|
||||
@ -874,7 +874,7 @@ kern_sigtimedwait(struct thread *td, sigset_t set, siginfo_t *info,
|
||||
mtx_unlock(&ps->ps_mtx);
|
||||
#ifdef KTRACE
|
||||
if (KTRPOINT(td, KTR_PSIG))
|
||||
ktrpsig(sig, action, td->td_flags & TDF_OLDMASK ?
|
||||
ktrpsig(sig, action, td->td_pflags & TDP_OLDMASK ?
|
||||
&td->td_oldsigmask : &td->td_sigmask, 0);
|
||||
#endif
|
||||
_STOPEVENT(p, S_SIG, sig);
|
||||
@ -1089,9 +1089,7 @@ kern_sigsuspend(struct thread *td, sigset_t mask)
|
||||
*/
|
||||
PROC_LOCK(p);
|
||||
td->td_oldsigmask = td->td_sigmask;
|
||||
mtx_lock_spin(&sched_lock);
|
||||
td->td_flags |= TDF_OLDMASK;
|
||||
mtx_unlock_spin(&sched_lock);
|
||||
td->td_pflags |= TDP_OLDMASK;
|
||||
SIG_CANTMASK(mask);
|
||||
td->td_sigmask = mask;
|
||||
signotify(td);
|
||||
@ -1122,9 +1120,7 @@ osigsuspend(td, uap)
|
||||
|
||||
PROC_LOCK(p);
|
||||
td->td_oldsigmask = td->td_sigmask;
|
||||
mtx_lock_spin(&sched_lock);
|
||||
td->td_flags |= TDF_OLDMASK;
|
||||
mtx_unlock_spin(&sched_lock);
|
||||
td->td_pflags |= TDP_OLDMASK;
|
||||
OSIG2SIG(uap->mask, mask);
|
||||
SIG_CANTMASK(mask);
|
||||
SIGSETLO(td->td_sigmask, mask);
|
||||
@ -2136,7 +2132,7 @@ postsig(sig)
|
||||
action = ps->ps_sigact[_SIG_IDX(sig)];
|
||||
#ifdef KTRACE
|
||||
if (KTRPOINT(td, KTR_PSIG))
|
||||
ktrpsig(sig, action, td->td_flags & TDF_OLDMASK ?
|
||||
ktrpsig(sig, action, td->td_pflags & TDP_OLDMASK ?
|
||||
&td->td_oldsigmask : &td->td_sigmask, 0);
|
||||
#endif
|
||||
_STOPEVENT(p, S_SIG, sig);
|
||||
@ -2164,11 +2160,9 @@ postsig(sig)
|
||||
* mask from before the sigsuspend is what we want
|
||||
* restored after the signal processing is completed.
|
||||
*/
|
||||
if (td->td_flags & TDF_OLDMASK) {
|
||||
if (td->td_pflags & TDP_OLDMASK) {
|
||||
returnmask = td->td_oldsigmask;
|
||||
mtx_lock_spin(&sched_lock);
|
||||
td->td_flags &= ~TDF_OLDMASK;
|
||||
mtx_unlock_spin(&sched_lock);
|
||||
td->td_pflags &= ~TDP_OLDMASK;
|
||||
} else
|
||||
returnmask = td->td_sigmask;
|
||||
|
||||
|
||||
@ -70,7 +70,8 @@ struct ktr_header {
|
||||
* is the public interface.
|
||||
*/
|
||||
#define KTRCHECK(td, type) ((td)->td_proc->p_traceflag & (1 << type))
|
||||
#define KTRPOINT(td, type) (KTRCHECK((td), (type)) && !(td)->td_inktrace)
|
||||
#define KTRPOINT(td, type) \
|
||||
(KTRCHECK((td), (type)) && !((td)->td_pflags & TDP_INKTRACE))
|
||||
|
||||
/*
|
||||
* ktrace record types
|
||||
|
||||
@ -269,14 +269,13 @@ struct thread {
|
||||
#define td_startzero td_flags
|
||||
int td_flags; /* (j) TDF_* flags. */
|
||||
int td_inhibitors; /* (j) Why can not run */
|
||||
int td_pflags; /* (k) Private thread (TDP_*) flags. */
|
||||
struct kse *td_last_kse; /* (j) Previous value of td_kse */
|
||||
struct kse *td_kse; /* (j) Current KSE if running. */
|
||||
int td_dupfd; /* (k) Ret value from fdopen. XXX */
|
||||
void *td_wchan; /* (j) Sleep address. */
|
||||
const char *td_wmesg; /* (j) Reason for sleep. */
|
||||
u_char td_lastcpu; /* (j) Last cpu we were on. */
|
||||
u_char td_inktr; /* (k) Currently handling a KTR. */
|
||||
u_char td_inktrace; /* (k) Currently handling a KTRACE. */
|
||||
u_char td_oncpu; /* (j) Which cpu we are on. */
|
||||
short td_locks; /* (k) DEBUG: lockmgr count of locks */
|
||||
struct mtx *td_blocked; /* (j) Mutex process is blocked on. */
|
||||
@ -333,7 +332,6 @@ struct thread {
|
||||
struct td_sched *td_sched; /* (*) Scheduler specific data */
|
||||
};
|
||||
/* flags kept in td_flags */
|
||||
#define TDF_OLDMASK 0x000001 /* Need to restore mask after suspend. */
|
||||
#define TDF_INPANIC 0x000002 /* Caused a panic, let it drive crashdump. */
|
||||
#define TDF_CAN_UNBIND 0x000004 /* Only temporarily bound. */
|
||||
#define TDF_SINTR 0x000008 /* Sleep is interruptible. */
|
||||
@ -352,6 +350,11 @@ struct thread {
|
||||
#define TDF_NEEDSIGCHK 0x020000 /* Thread may need signal delivery. */
|
||||
#define TDF_DEADLKTREAT 0x800000 /* Lock aquisition - deadlock treatment. */
|
||||
|
||||
/* "private" flags kept in td_pflags */
|
||||
#define TDP_OLDMASK 0x0001 /* Need to restore mask after suspend. */
|
||||
#define TDP_INKTR 0x0002 /* Thread is currently in KTR code. */
|
||||
#define TDP_INKTRACE 0x0004 /* Thread is currently in KTRACE code. */
|
||||
|
||||
#define TDI_SUSPENDED 0x0001 /* On suspension queue. */
|
||||
#define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
|
||||
#define TDI_SWAPPED 0x0004 /* Stack not in mem.. bad juju if run. */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user