Date: Sat, 27 Dec 2014 00:55:15 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r276272 - in stable/10: bin/ps sys/kern sys/rpc sys/sys Message-ID: <201412270055.sBR0tFEx036205@svn.freebsd.org>
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Author: kib Date: Sat Dec 27 00:55:14 2014 New Revision: 276272 URL: https://svnweb.freebsd.org/changeset/base/276272 Log: MFC r275745: Add facility to stop all userspace processes. MFC r275753: Fix gcc build. MFC r275820: Add missed break. Modified: stable/10/bin/ps/ps.1 stable/10/sys/kern/kern_exec.c stable/10/sys/kern/kern_exit.c stable/10/sys/kern/kern_fork.c stable/10/sys/kern/kern_proc.c stable/10/sys/kern/kern_sig.c stable/10/sys/kern/kern_thread.c stable/10/sys/rpc/svc.c stable/10/sys/sys/proc.h Directory Properties: stable/10/ (props changed) Modified: stable/10/bin/ps/ps.1 ============================================================================== --- stable/10/bin/ps/ps.1 Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/bin/ps/ps.1 Sat Dec 27 00:55:14 2014 (r276272) @@ -29,7 +29,7 @@ .\" @(#)ps.1 8.3 (Berkeley) 4/18/94 .\" $FreeBSD$ .\" -.Dd August 7, 2014 +.Dd December 9, 2014 .Dt PS 1 .Os .Sh NAME @@ -332,6 +332,7 @@ the include file .It Dv "P_SINGLE_BOUNDARY" Ta No "0x400000" Ta "Threads should suspend at user boundary" .It Dv "P_HWPMC" Ta No "0x800000" Ta "Process is using HWPMCs" .It Dv "P_JAILED" Ta No "0x1000000" Ta "Process is in jail" +.It Dv "P_TOTAL_STOP" Ta No "0x2000000" Ta "Stopped for system suspend" .It Dv "P_INEXEC" Ta No "0x4000000" Ta "Process is in execve()" .It Dv "P_STATCHILD" Ta No "0x8000000" Ta "Child process stopped or exited" .It Dv "P_INMEM" Ta No "0x10000000" Ta "Loaded into memory" Modified: stable/10/sys/kern/kern_exec.c ============================================================================== --- stable/10/sys/kern/kern_exec.c Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/kern/kern_exec.c Sat Dec 27 00:55:14 2014 (r276272) @@ -292,7 +292,7 @@ kern_execve(td, args, mac_p) args->endp - args->begin_envv); if (p->p_flag & P_HADTHREADS) { PROC_LOCK(p); - if (thread_single(SINGLE_BOUNDARY)) { + if (thread_single(p, SINGLE_BOUNDARY)) { PROC_UNLOCK(p); exec_free_args(args); return (ERESTART); /* Try again later. */ @@ -311,9 +311,9 @@ kern_execve(td, args, mac_p) * force other threads to suicide. */ if (error == 0) - thread_single(SINGLE_EXIT); + thread_single(p, SINGLE_EXIT); else - thread_single_end(); + thread_single_end(p, SINGLE_BOUNDARY); PROC_UNLOCK(p); } if ((td->td_pflags & TDP_EXECVMSPC) != 0) { Modified: stable/10/sys/kern/kern_exit.c ============================================================================== --- stable/10/sys/kern/kern_exit.c Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/kern/kern_exit.c Sat Dec 27 00:55:14 2014 (r276272) @@ -208,7 +208,7 @@ exit1(struct thread *td, int rv) * re-check all suspension request, the thread should * either be suspended there or exit. */ - if (!thread_single(SINGLE_EXIT)) + if (!thread_single(p, SINGLE_EXIT)) /* * All other activity in this process is now * stopped. Threading support has been turned Modified: stable/10/sys/kern/kern_fork.c ============================================================================== --- stable/10/sys/kern/kern_fork.c Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/kern/kern_fork.c Sat Dec 27 00:55:14 2014 (r276272) @@ -323,7 +323,7 @@ fork_norfproc(struct thread *td, int fla if (((p1->p_flag & (P_HADTHREADS|P_SYSTEM)) == P_HADTHREADS) && (flags & (RFCFDG | RFFDG))) { PROC_LOCK(p1); - if (thread_single(SINGLE_BOUNDARY)) { + if (thread_single(p1, SINGLE_BOUNDARY)) { PROC_UNLOCK(p1); return (ERESTART); } @@ -354,7 +354,7 @@ fail: if (((p1->p_flag & (P_HADTHREADS|P_SYSTEM)) == P_HADTHREADS) && (flags & (RFCFDG | RFFDG))) { PROC_LOCK(p1); - thread_single_end(); + thread_single_end(p1, SINGLE_BOUNDARY); PROC_UNLOCK(p1); } return (error); @@ -390,6 +390,7 @@ do_fork(struct thread *td, int flags, st p2->p_pid = trypid; AUDIT_ARG_PID(p2->p_pid); LIST_INSERT_HEAD(&allproc, p2, p_list); + allproc_gen++; LIST_INSERT_HEAD(PIDHASH(p2->p_pid), p2, p_hash); tidhash_add(td2); PROC_LOCK(p2); Modified: stable/10/sys/kern/kern_proc.c ============================================================================== --- stable/10/sys/kern/kern_proc.c Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/kern/kern_proc.c Sat Dec 27 00:55:14 2014 (r276272) @@ -2854,3 +2854,142 @@ static SYSCTL_NODE(_kern_proc, KERN_PROC static SYSCTL_NODE(_kern_proc, KERN_PROC_SIGTRAMP, sigtramp, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc_sigtramp, "Process signal trampoline location"); + +int allproc_gen; + +void +stop_all_proc(void) +{ + struct proc *cp, *p; + int r, gen; + bool restart, seen_stopped, seen_exiting, stopped_some; + + cp = curproc; + /* + * stop_all_proc() assumes that all process which have + * usermode must be stopped, except current process, for + * obvious reasons. Since other threads in the process + * establishing global stop could unstop something, disable + * calls from multithreaded processes as precaution. The + * service must not be user-callable anyway. + */ + KASSERT((cp->p_flag & P_HADTHREADS) == 0 || + (cp->p_flag & P_KTHREAD) != 0, ("mt stop_all_proc")); + +allproc_loop: + sx_xlock(&allproc_lock); + gen = allproc_gen; + seen_exiting = seen_stopped = stopped_some = restart = false; + LIST_REMOVE(cp, p_list); + LIST_INSERT_HEAD(&allproc, cp, p_list); + for (;;) { + p = LIST_NEXT(cp, p_list); + if (p == NULL) + break; + LIST_REMOVE(cp, p_list); + LIST_INSERT_AFTER(p, cp, p_list); + PROC_LOCK(p); + if ((p->p_flag & (P_KTHREAD | P_SYSTEM | + P_TOTAL_STOP)) != 0) { + PROC_UNLOCK(p); + continue; + } + if ((p->p_flag & P_WEXIT) != 0) { + seen_exiting = true; + PROC_UNLOCK(p); + continue; + } + if (P_SHOULDSTOP(p) == P_STOPPED_SINGLE) { + /* + * Stopped processes are tolerated when there + * are no other processes which might continue + * them. P_STOPPED_SINGLE but not + * P_TOTAL_STOP process still has at least one + * thread running. + */ + seen_stopped = true; + PROC_UNLOCK(p); + continue; + } + _PHOLD(p); + sx_xunlock(&allproc_lock); + r = thread_single(p, SINGLE_ALLPROC); + if (r != 0) + restart = true; + else + stopped_some = true; + _PRELE(p); + PROC_UNLOCK(p); + sx_xlock(&allproc_lock); + } + /* Catch forked children we did not see in iteration. */ + if (gen != allproc_gen) + restart = true; + sx_xunlock(&allproc_lock); + if (restart || stopped_some || seen_exiting || seen_stopped) { + kern_yield(PRI_USER); + goto allproc_loop; + } +} + +void +resume_all_proc(void) +{ + struct proc *cp, *p; + + cp = curproc; + sx_xlock(&allproc_lock); + LIST_REMOVE(cp, p_list); + LIST_INSERT_HEAD(&allproc, cp, p_list); + for (;;) { + p = LIST_NEXT(cp, p_list); + if (p == NULL) + break; + LIST_REMOVE(cp, p_list); + LIST_INSERT_AFTER(p, cp, p_list); + PROC_LOCK(p); + if ((p->p_flag & P_TOTAL_STOP) != 0) { + sx_xunlock(&allproc_lock); + _PHOLD(p); + thread_single_end(p, SINGLE_ALLPROC); + _PRELE(p); + PROC_UNLOCK(p); + sx_xlock(&allproc_lock); + } else { + PROC_UNLOCK(p); + } + } + sx_xunlock(&allproc_lock); +} + +#define TOTAL_STOP_DEBUG 1 +#ifdef TOTAL_STOP_DEBUG +volatile static int ap_resume; +#include <sys/mount.h> + +static int +sysctl_debug_stop_all_proc(SYSCTL_HANDLER_ARGS) +{ + int error, val; + + val = 0; + ap_resume = 0; + error = sysctl_handle_int(oidp, &val, 0, req); + if (error != 0 || req->newptr == NULL) + return (error); + if (val != 0) { + stop_all_proc(); + syncer_suspend(); + while (ap_resume == 0) + ; + syncer_resume(); + resume_all_proc(); + } + return (0); +} + +SYSCTL_PROC(_debug, OID_AUTO, stop_all_proc, CTLTYPE_INT | CTLFLAG_RW | + CTLFLAG_MPSAFE, __DEVOLATILE(int *, &ap_resume), 0, + sysctl_debug_stop_all_proc, "I", + ""); +#endif Modified: stable/10/sys/kern/kern_sig.c ============================================================================== --- stable/10/sys/kern/kern_sig.c Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/kern/kern_sig.c Sat Dec 27 00:55:14 2014 (r276272) @@ -2500,7 +2500,7 @@ ptracestop(struct thread *td, int sig) cv_broadcast(&p->p_dbgwait); } stopme: - thread_suspend_switch(td); + thread_suspend_switch(td, p); if (p->p_xthread == td) p->p_xthread = NULL; if (!(p->p_flag & P_TRACED)) @@ -2761,7 +2761,7 @@ issignal(struct thread *td) p->p_xstat = sig; PROC_SLOCK(p); sig_suspend_threads(td, p, 0); - thread_suspend_switch(td); + thread_suspend_switch(td, p); PROC_SUNLOCK(p); mtx_lock(&ps->ps_mtx); break; @@ -2942,7 +2942,7 @@ sigexit(td, sig) * XXX If another thread attempts to single-thread before us * (e.g. via fork()), we won't get a dump at all. */ - if ((sigprop(sig) & SA_CORE) && (thread_single(SINGLE_NO_EXIT) == 0)) { + if ((sigprop(sig) & SA_CORE) && thread_single(p, SINGLE_NO_EXIT) == 0) { p->p_sig = sig; /* * Log signals which would cause core dumps Modified: stable/10/sys/kern/kern_thread.c ============================================================================== --- stable/10/sys/kern/kern_thread.c Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/kern/kern_thread.c Sat Dec 27 00:55:14 2014 (r276272) @@ -446,7 +446,7 @@ thread_exit(void) if (p->p_numthreads == p->p_suspcount) { thread_lock(p->p_singlethread); wakeup_swapper = thread_unsuspend_one( - p->p_singlethread); + p->p_singlethread, p); thread_unlock(p->p_singlethread); if (wakeup_swapper) kick_proc0(); @@ -575,7 +575,7 @@ calc_remaining(struct proc *p, int mode) remaining = p->p_numthreads; else if (mode == SINGLE_BOUNDARY) remaining = p->p_numthreads - p->p_boundary_count; - else if (mode == SINGLE_NO_EXIT) + else if (mode == SINGLE_NO_EXIT || mode == SINGLE_ALLPROC) remaining = p->p_numthreads - p->p_suspcount; else panic("calc_remaining: wrong mode %d", mode); @@ -586,7 +586,7 @@ static int remain_for_mode(int mode) { - return (1); + return (mode == SINGLE_ALLPROC ? 0 : 1); } static int @@ -602,22 +602,43 @@ weed_inhib(int mode, struct thread *td2, switch (mode) { case SINGLE_EXIT: if (TD_IS_SUSPENDED(td2)) - wakeup_swapper |= thread_unsuspend_one(td2); + wakeup_swapper |= thread_unsuspend_one(td2, p); if (TD_ON_SLEEPQ(td2) && (td2->td_flags & TDF_SINTR) != 0) wakeup_swapper |= sleepq_abort(td2, EINTR); break; case SINGLE_BOUNDARY: if (TD_IS_SUSPENDED(td2) && (td2->td_flags & TDF_BOUNDARY) == 0) - wakeup_swapper |= thread_unsuspend_one(td2); + wakeup_swapper |= thread_unsuspend_one(td2, p); if (TD_ON_SLEEPQ(td2) && (td2->td_flags & TDF_SINTR) != 0) wakeup_swapper |= sleepq_abort(td2, ERESTART); break; case SINGLE_NO_EXIT: if (TD_IS_SUSPENDED(td2) && (td2->td_flags & TDF_BOUNDARY) == 0) - wakeup_swapper |= thread_unsuspend_one(td2); + wakeup_swapper |= thread_unsuspend_one(td2, p); if (TD_ON_SLEEPQ(td2) && (td2->td_flags & TDF_SINTR) != 0) wakeup_swapper |= sleepq_abort(td2, ERESTART); break; + case SINGLE_ALLPROC: + /* + * ALLPROC suspend tries to avoid spurious EINTR for + * threads sleeping interruptable, by suspending the + * thread directly, similarly to sig_suspend_threads(). + * Since such sleep is not performed at the user + * boundary, TDF_BOUNDARY flag is not set, and TDF_ALLPROCSUSP + * is used to avoid immediate un-suspend. + */ + if (TD_IS_SUSPENDED(td2) && (td2->td_flags & (TDF_BOUNDARY | + TDF_ALLPROCSUSP)) == 0) + wakeup_swapper |= thread_unsuspend_one(td2, p); + if (TD_ON_SLEEPQ(td2) && (td2->td_flags & TDF_SINTR) != 0) { + if ((td2->td_flags & TDF_SBDRY) == 0) { + thread_suspend_one(td2); + td2->td_flags |= TDF_ALLPROCSUSP; + } else { + wakeup_swapper |= sleepq_abort(td2, ERESTART); + } + } + break; } return (wakeup_swapper); } @@ -636,19 +657,29 @@ weed_inhib(int mode, struct thread *td2, * any sleeping threads that are interruptable. (PCATCH). */ int -thread_single(int mode) +thread_single(struct proc *p, int mode) { struct thread *td; struct thread *td2; - struct proc *p; int remaining, wakeup_swapper; td = curthread; - p = td->td_proc; + KASSERT(mode == SINGLE_EXIT || mode == SINGLE_BOUNDARY || + mode == SINGLE_ALLPROC || mode == SINGLE_NO_EXIT, + ("invalid mode %d", mode)); + /* + * If allowing non-ALLPROC singlethreading for non-curproc + * callers, calc_remaining() and remain_for_mode() should be + * adjusted to also account for td->td_proc != p. For now + * this is not implemented because it is not used. + */ + KASSERT((mode == SINGLE_ALLPROC && td->td_proc != p) || + (mode != SINGLE_ALLPROC && td->td_proc == p), + ("mode %d proc %p curproc %p", mode, p, td->td_proc)); mtx_assert(&Giant, MA_NOTOWNED); PROC_LOCK_ASSERT(p, MA_OWNED); - if ((p->p_flag & P_HADTHREADS) == 0) + if ((p->p_flag & P_HADTHREADS) == 0 && mode != SINGLE_ALLPROC) return (0); /* Is someone already single threading? */ @@ -665,6 +696,8 @@ thread_single(int mode) else p->p_flag &= ~P_SINGLE_BOUNDARY; } + if (mode == SINGLE_ALLPROC) + p->p_flag |= P_TOTAL_STOP; p->p_flag |= P_STOPPED_SINGLE; PROC_SLOCK(p); p->p_singlethread = td; @@ -678,13 +711,13 @@ thread_single(int mode) continue; thread_lock(td2); td2->td_flags |= TDF_ASTPENDING | TDF_NEEDSUSPCHK; - if (TD_IS_INHIBITED(td2)) + if (TD_IS_INHIBITED(td2)) { wakeup_swapper |= weed_inhib(mode, td2, p); #ifdef SMP - else if (TD_IS_RUNNING(td2) && td != td2) { + } else if (TD_IS_RUNNING(td2) && td != td2) { forward_signal(td2); - } #endif + } thread_unlock(td2); } if (wakeup_swapper) @@ -702,7 +735,7 @@ stopme: * Wake us up when everyone else has suspended. * In the mean time we suspend as well. */ - thread_suspend_switch(td); + thread_suspend_switch(td, p); remaining = calc_remaining(p, mode); } if (mode == SINGLE_EXIT) { @@ -812,8 +845,9 @@ thread_suspend_check(int return_instead) * Ignore suspend requests for stop signals if they * are deferred. */ - if (P_SHOULDSTOP(p) == P_STOPPED_SIG && - td->td_flags & TDF_SBDRY) { + if ((P_SHOULDSTOP(p) == P_STOPPED_SIG || + (p->p_flag & P_TOTAL_STOP) != 0) && + (td->td_flags & TDF_SBDRY) != 0) { KASSERT(return_instead, ("TDF_SBDRY set for unsafe thread_suspend_check")); return (0); @@ -840,7 +874,7 @@ thread_suspend_check(int return_instead) if (p->p_numthreads == p->p_suspcount + 1) { thread_lock(p->p_singlethread); wakeup_swapper = - thread_unsuspend_one(p->p_singlethread); + thread_unsuspend_one(p->p_singlethread, p); thread_unlock(p->p_singlethread); if (wakeup_swapper) kick_proc0(); @@ -873,11 +907,9 @@ thread_suspend_check(int return_instead) } void -thread_suspend_switch(struct thread *td) +thread_suspend_switch(struct thread *td, struct proc *p) { - struct proc *p; - p = td->td_proc; KASSERT(!TD_IS_SUSPENDED(td), ("already suspended")); PROC_LOCK_ASSERT(p, MA_OWNED); PROC_SLOCK_ASSERT(p, MA_OWNED); @@ -885,8 +917,10 @@ thread_suspend_switch(struct thread *td) * We implement thread_suspend_one in stages here to avoid * dropping the proc lock while the thread lock is owned. */ - thread_stopped(p); - p->p_suspcount++; + if (p == td->td_proc) { + thread_stopped(p); + p->p_suspcount++; + } PROC_UNLOCK(p); thread_lock(td); td->td_flags &= ~TDF_NEEDSUSPCHK; @@ -904,8 +938,9 @@ thread_suspend_switch(struct thread *td) void thread_suspend_one(struct thread *td) { - struct proc *p = td->td_proc; + struct proc *p; + p = td->td_proc; PROC_SLOCK_ASSERT(p, MA_OWNED); THREAD_LOCK_ASSERT(td, MA_OWNED); KASSERT(!TD_IS_SUSPENDED(td), ("already suspended")); @@ -916,15 +951,17 @@ thread_suspend_one(struct thread *td) } int -thread_unsuspend_one(struct thread *td) +thread_unsuspend_one(struct thread *td, struct proc *p) { - struct proc *p = td->td_proc; - PROC_SLOCK_ASSERT(p, MA_OWNED); THREAD_LOCK_ASSERT(td, MA_OWNED); KASSERT(TD_IS_SUSPENDED(td), ("Thread not suspended")); TD_CLR_SUSPENDED(td); - p->p_suspcount--; + td->td_flags &= ~TDF_ALLPROCSUSP; + if (td->td_proc == p) { + PROC_SLOCK_ASSERT(p, MA_OWNED); + p->p_suspcount--; + } return (setrunnable(td)); } @@ -944,7 +981,7 @@ thread_unsuspend(struct proc *p) FOREACH_THREAD_IN_PROC(p, td) { thread_lock(td); if (TD_IS_SUSPENDED(td)) { - wakeup_swapper |= thread_unsuspend_one(td); + wakeup_swapper |= thread_unsuspend_one(td, p); } thread_unlock(td); } @@ -955,9 +992,12 @@ thread_unsuspend(struct proc *p) * threading request. Now we've downgraded to single-threaded, * let it continue. */ - thread_lock(p->p_singlethread); - wakeup_swapper = thread_unsuspend_one(p->p_singlethread); - thread_unlock(p->p_singlethread); + if (p->p_singlethread->td_proc == p) { + thread_lock(p->p_singlethread); + wakeup_swapper = thread_unsuspend_one( + p->p_singlethread, p); + thread_unlock(p->p_singlethread); + } } if (wakeup_swapper) kick_proc0(); @@ -967,15 +1007,20 @@ thread_unsuspend(struct proc *p) * End the single threading mode.. */ void -thread_single_end(void) +thread_single_end(struct proc *p, int mode) { struct thread *td; - struct proc *p; int wakeup_swapper; - p = curproc; + KASSERT(mode == SINGLE_EXIT || mode == SINGLE_BOUNDARY || + mode == SINGLE_ALLPROC || mode == SINGLE_NO_EXIT, + ("invalid mode %d", mode)); PROC_LOCK_ASSERT(p, MA_OWNED); - p->p_flag &= ~(P_STOPPED_SINGLE | P_SINGLE_EXIT | P_SINGLE_BOUNDARY); + KASSERT((mode == SINGLE_ALLPROC && (p->p_flag & P_TOTAL_STOP) != 0) || + (mode != SINGLE_ALLPROC && (p->p_flag & P_TOTAL_STOP) == 0), + ("mode %d does not match P_TOTAL_STOP", mode)); + p->p_flag &= ~(P_STOPPED_SINGLE | P_SINGLE_EXIT | P_SINGLE_BOUNDARY | + P_TOTAL_STOP); PROC_SLOCK(p); p->p_singlethread = NULL; wakeup_swapper = 0; @@ -985,12 +1030,11 @@ thread_single_end(void) * on the process. The single threader must be allowed * to continue however as this is a bad place to stop. */ - if (p->p_numthreads != remain_for_mode(SINGLE_EXIT) && - !P_SHOULDSTOP(p)) { + if (p->p_numthreads != remain_for_mode(mode) && !P_SHOULDSTOP(p)) { FOREACH_THREAD_IN_PROC(p, td) { thread_lock(td); if (TD_IS_SUSPENDED(td)) { - wakeup_swapper |= thread_unsuspend_one(td); + wakeup_swapper |= thread_unsuspend_one(td, p); } thread_unlock(td); } Modified: stable/10/sys/rpc/svc.c ============================================================================== --- stable/10/sys/rpc/svc.c Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/rpc/svc.c Sat Dec 27 00:55:14 2014 (r276272) @@ -1190,7 +1190,8 @@ svc_run_internal(SVCGROUP *grp, bool_t i mtx_unlock(&grp->sg_lock); p = curproc; PROC_LOCK(p); - if (P_SHOULDSTOP(p)) { + if (P_SHOULDSTOP(p) || + (p->p_flag & P_TOTAL_STOP) != 0) { thread_suspend_check(0); PROC_UNLOCK(p); mtx_lock(&grp->sg_lock); Modified: stable/10/sys/sys/proc.h ============================================================================== --- stable/10/sys/sys/proc.h Sat Dec 27 00:44:33 2014 (r276271) +++ stable/10/sys/sys/proc.h Sat Dec 27 00:55:14 2014 (r276272) @@ -355,7 +355,7 @@ do { \ #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */ #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ -#define TDF_UNUSED09 0x00000200 /* --available-- */ +#define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */ #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */ #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */ @@ -629,7 +629,7 @@ struct proc { #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */ #define P_HWPMC 0x800000 /* Process is using HWPMCs */ #define P_JAILED 0x1000000 /* Process is in jail. */ -#define P_UNUSED1 0x2000000 +#define P_TOTAL_STOP 0x2000000 /* Stopped in proc_stop_total. */ #define P_INEXEC 0x4000000 /* Process is in execve(). */ #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */ #define P_INMEM 0x10000000 /* Loaded into memory. */ @@ -690,6 +690,7 @@ struct proc { #define SINGLE_NO_EXIT 0 #define SINGLE_EXIT 1 #define SINGLE_BOUNDARY 2 +#define SINGLE_ALLPROC 3 #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_PARGS); @@ -816,6 +817,7 @@ extern LIST_HEAD(pgrphashhead, pgrp) *pg extern u_long pgrphash; extern struct sx allproc_lock; +extern int allproc_gen; extern struct sx proctree_lock; extern struct mtx ppeers_lock; extern struct proc proc0; /* Process slot for swapper. */ @@ -939,8 +941,8 @@ void thread_exit(void) __dead2; void thread_free(struct thread *td); void thread_link(struct thread *td, struct proc *p); void thread_reap(void); -int thread_single(int how); -void thread_single_end(void); +int thread_single(struct proc *p, int how); +void thread_single_end(struct proc *p, int how); void thread_stash(struct thread *td); void thread_stopped(struct proc *p); void childproc_stopped(struct proc *child, int reason); @@ -948,14 +950,17 @@ void childproc_continued(struct proc *ch void childproc_exited(struct proc *child); int thread_suspend_check(int how); bool thread_suspend_check_needed(void); -void thread_suspend_switch(struct thread *); +void thread_suspend_switch(struct thread *, struct proc *p); void thread_suspend_one(struct thread *td); void thread_unlink(struct thread *td); void thread_unsuspend(struct proc *p); -int thread_unsuspend_one(struct thread *td); +int thread_unsuspend_one(struct thread *td, struct proc *p); void thread_wait(struct proc *p); struct thread *thread_find(struct proc *p, lwpid_t tid); +void stop_all_proc(void); +void resume_all_proc(void); + static __inline int curthread_pflags_set(int flags) {
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