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📄 Make.tags.inc(2.13 KB)
📄 Makefile(302 B)
📄 bus_if.m(26.31 KB)
📄 capabilities.conf(13.67 KB)
📄 clock_if.m(1.7 KB)
📄 cpufreq_if.m(2.27 KB)
📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
📄 genoffset.c(1.68 KB)
📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
📄 imgact_binmisc.c(18.64 KB)
📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
📄 imgact_elf64.c(1.47 KB)
📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
📄 kern_acct.c(19.03 KB)
📄 kern_alq.c(24.97 KB)
📄 kern_clock.c(21.12 KB)
📄 kern_clocksource.c(23.34 KB)
📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
📄 kern_et.c(7.1 KB)
📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
📄 kern_rwlock.c(40.72 KB)
📄 kern_sdt.c(2.05 KB)
📄 kern_sema.c(4.85 KB)
📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
📄 kern_synch.c(18.17 KB)
📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
📄 link_elf_obj.c(44.41 KB)
📄 linker_if.m(3.96 KB)
📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: kern_thr.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2003, Jeffrey Roberson <jeff@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_posix.h"
#include "opt_hwpmc_hooks.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/posix4.h>
#include <sys/ptrace.h>
#include <sys/racct.h>
#include <sys/resourcevar.h>
#include <sys/rwlock.h>
#include <sys/sched.h>
#include <sys/sysctl.h>
#include <sys/smp.h>
#include <sys/syscallsubr.h>
#include <sys/sysent.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <sys/ucontext.h>
#include <sys/thr.h>
#include <sys/rtprio.h>
#include <sys/umtx.h>
#include <sys/limits.h>
#ifdef	HWPMC_HOOKS
#include <sys/pmckern.h>
#endif

#include <machine/frame.h>

#include <security/audit/audit.h>

static SYSCTL_NODE(_kern, OID_AUTO, threads, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
    "thread allocation");

int max_threads_per_proc = 1500;
SYSCTL_INT(_kern_threads, OID_AUTO, max_threads_per_proc, CTLFLAG_RW,
    &max_threads_per_proc, 0, "Limit on threads per proc");

static int max_threads_hits;
SYSCTL_INT(_kern_threads, OID_AUTO, max_threads_hits, CTLFLAG_RD,
    &max_threads_hits, 0, "kern.threads.max_threads_per_proc hit count");

#ifdef COMPAT_FREEBSD32

static inline int
suword_lwpid(void *addr, lwpid_t lwpid)
{
	int error;

if (SV_CURPROC_FLAG(SV_LP64))
		error = suword(addr, lwpid);
	else
		error = suword32(addr, lwpid);
	return (error);
}

#else
#define suword_lwpid	suword
#endif

/*
 * System call interface.
 */

struct thr_create_initthr_args {
	ucontext_t ctx;
	long *tid;
};

static int
thr_create_initthr(struct thread *td, void *thunk)
{
	struct thr_create_initthr_args *args;

/* Copy out the child tid. */
	args = thunk;
	if (args->tid != NULL && suword_lwpid(args->tid, td->td_tid))
		return (EFAULT);

return (set_mcontext(td, &args->ctx.uc_mcontext));
}

int
sys_thr_create(struct thread *td, struct thr_create_args *uap)
    /* ucontext_t *ctx, long *id, int flags */
{
	struct thr_create_initthr_args args;
	int error;

if ((error = copyin(uap->ctx, &args.ctx, sizeof(args.ctx))))
		return (error);
	args.tid = uap->id;
	return (thread_create(td, NULL, thr_create_initthr, &args));
}

int
sys_thr_new(struct thread *td, struct thr_new_args *uap)
    /* struct thr_param * */
{
	struct thr_param param;
	int error;

if (uap->param_size < 0 || uap->param_size > sizeof(param))
		return (EINVAL);
	bzero(&param, sizeof(param));
	if ((error = copyin(uap->param, &param, uap->param_size)))
		return (error);
	return (kern_thr_new(td, &param));
}

static int
thr_new_initthr(struct thread *td, void *thunk)
{
	stack_t stack;
	struct thr_param *param;

/*
	 * Here we copy out tid to two places, one for child and one
	 * for parent, because pthread can create a detached thread,
	 * if parent wants to safely access child tid, it has to provide
	 * its storage, because child thread may exit quickly and
	 * memory is freed before parent thread can access it.
	 */
	param = thunk;
	if ((param->child_tid != NULL &&
	    suword_lwpid(param->child_tid, td->td_tid)) ||
	    (param->parent_tid != NULL &&
	    suword_lwpid(param->parent_tid, td->td_tid)))
		return (EFAULT);

/* Set up our machine context. */
	stack.ss_sp = param->stack_base;
	stack.ss_size = param->stack_size;
	/* Set upcall address to user thread entry function. */
	cpu_set_upcall(td, param->start_func, param->arg, &stack);
	/* Setup user TLS address and TLS pointer register. */
	return (cpu_set_user_tls(td, param->tls_base));
}

int
kern_thr_new(struct thread *td, struct thr_param *param)
{
	struct rtprio rtp, *rtpp;
	int error;

rtpp = NULL;
	if (param->rtp != 0) {
		error = copyin(param->rtp, &rtp, sizeof(struct rtprio));
		if (error)
			return (error);
		rtpp = &rtp;
	}
	return (thread_create(td, rtpp, thr_new_initthr, param));
}

int
thread_create(struct thread *td, struct rtprio *rtp,
    int (*initialize_thread)(struct thread *, void *), void *thunk)
{
	struct thread *newtd;
	struct proc *p;
	int error;

p = td->td_proc;

if (rtp != NULL) {
		switch(rtp->type) {
		case RTP_PRIO_REALTIME:
		case RTP_PRIO_FIFO:
			/* Only root can set scheduler policy */
			if (priv_check(td, PRIV_SCHED_SETPOLICY) != 0)
				return (EPERM);
			if (rtp->prio > RTP_PRIO_MAX)
				return (EINVAL);
			break;
		case RTP_PRIO_NORMAL:
			rtp->prio = 0;
			break;
		default:
			return (EINVAL);
		}
	}

#ifdef RACCT
	if (racct_enable) {
		PROC_LOCK(p);
		error = racct_add(p, RACCT_NTHR, 1);
		PROC_UNLOCK(p);
		if (error != 0)
			return (EPROCLIM);
	}
#endif

/* Initialize our td */
	error = kern_thr_alloc(p, 0, &newtd);
	if (error)
		goto fail;

cpu_copy_thread(newtd, td);

bzero(&newtd->td_startzero,
	    __rangeof(struct thread, td_startzero, td_endzero));
	bcopy(&td->td_startcopy, &newtd->td_startcopy,
	    __rangeof(struct thread, td_startcopy, td_endcopy));
	newtd->td_proc = td->td_proc;
	newtd->td_rb_list = newtd->td_rbp_list = newtd->td_rb_inact = 0;
	thread_cow_get(newtd, td);

error = initialize_thread(newtd, thunk);
	if (error != 0) {
		thread_cow_free(newtd);
		thread_free(newtd);
		goto fail;
	}

PROC_LOCK(p);
	p->p_flag |= P_HADTHREADS;
	thread_link(newtd, p);
	bcopy(p->p_comm, newtd->td_name, sizeof(newtd->td_name));
	thread_lock(td);
	/* let the scheduler know about these things. */
	sched_fork_thread(td, newtd);
	thread_unlock(td);
	if (P_SHOULDSTOP(p))
		newtd->td_flags |= TDF_ASTPENDING | TDF_NEEDSUSPCHK;
	if (p->p_ptevents & PTRACE_LWP)
		newtd->td_dbgflags |= TDB_BORN;

PROC_UNLOCK(p);
#ifdef	HWPMC_HOOKS
	if (PMC_PROC_IS_USING_PMCS(p))
		PMC_CALL_HOOK(newtd, PMC_FN_THR_CREATE, NULL);
	else if (PMC_SYSTEM_SAMPLING_ACTIVE())
		PMC_CALL_HOOK_UNLOCKED(newtd, PMC_FN_THR_CREATE_LOG, NULL);
#endif

tidhash_add(newtd);

/* ignore timesharing class */
	if (rtp != NULL && !(td->td_pri_class == PRI_TIMESHARE &&
	    rtp->type == RTP_PRIO_NORMAL))
		rtp_to_pri(rtp, newtd);

thread_lock(newtd);
	TD_SET_CAN_RUN(newtd);
	sched_add(newtd, SRQ_BORING);

return (0);

fail:
#ifdef RACCT
	if (racct_enable) {
		PROC_LOCK(p);
		racct_sub(p, RACCT_NTHR, 1);
		PROC_UNLOCK(p);
	}
#endif
	return (error);
}

int
sys_thr_self(struct thread *td, struct thr_self_args *uap)
    /* long *id */
{
	int error;

error = suword_lwpid(uap->id, (unsigned)td->td_tid);
	if (error == -1)
		return (EFAULT);
	return (0);
}

int
sys_thr_exit(struct thread *td, struct thr_exit_args *uap)
    /* long *state */
{

umtx_thread_exit(td);

/* Signal userland that it can free the stack. */
	if ((void *)uap->state != NULL) {
		suword_lwpid(uap->state, 1);
		kern_umtx_wake(td, uap->state, INT_MAX, 0);
	}

return (kern_thr_exit(td));
}

int
kern_thr_exit(struct thread *td)
{
	struct proc *p;

p = td->td_proc;

/*
	 * If all of the threads in a process call this routine to
	 * exit (e.g. all threads call pthread_exit()), exactly one
	 * thread should return to the caller to terminate the process
	 * instead of the thread.
	 *
	 * Checking p_numthreads alone is not sufficient since threads
	 * might be committed to terminating while the PROC_LOCK is
	 * dropped in either ptracestop() or while removing this thread
	 * from the tidhash.  Instead, the p_pendingexits field holds
	 * the count of threads in either of those states and a thread
	 * is considered the "last" thread if all of the other threads
	 * in a process are already terminating.
	 */
	PROC_LOCK(p);
	if (p->p_numthreads == p->p_pendingexits + 1) {
		/*
		 * Ignore attempts to shut down last thread in the
		 * proc.  This will actually call _exit(2) in the
		 * usermode trampoline when it returns.
		 */
		PROC_UNLOCK(p);
		return (0);
	}

if (p->p_sysent->sv_ontdexit != NULL)
		p->p_sysent->sv_ontdexit(td);

td->td_dbgflags |= TDB_EXIT;
	if (p->p_ptevents & PTRACE_LWP) {
		p->p_pendingexits++;
		ptracestop(td, SIGTRAP, NULL);
		p->p_pendingexits--;
	}
	tidhash_remove(td);

/*
	 * The check above should prevent all other threads from this
	 * process from exiting while the PROC_LOCK is dropped, so
	 * there must be at least one other thread other than the
	 * current thread.
	 */
	KASSERT(p->p_numthreads > 1, ("too few threads"));
	racct_sub(p, RACCT_NTHR, 1);
	tdsigcleanup(td);

#ifdef AUDIT
	AUDIT_SYSCALL_EXIT(0, td);
#endif

PROC_SLOCK(p);
	thread_stopped(p);
	thread_exit();
	/* NOTREACHED */
}

int
sys_thr_kill(struct thread *td, struct thr_kill_args *uap)
    /* long id, int sig */
{
	ksiginfo_t ksi;
	struct thread *ttd;
	struct proc *p;
	int error;

p = td->td_proc;
	ksiginfo_init(&ksi);
	ksi.ksi_signo = uap->sig;
	ksi.ksi_code = SI_LWP;
	ksi.ksi_pid = p->p_pid;
	ksi.ksi_uid = td->td_ucred->cr_ruid;
	if (uap->id == -1) {
		if (uap->sig != 0 && !_SIG_VALID(uap->sig)) {
			error = EINVAL;
		} else {
			error = ESRCH;
			PROC_LOCK(p);
			FOREACH_THREAD_IN_PROC(p, ttd) {
				if (ttd != td) {
					error = 0;
					if (uap->sig == 0)
						break;
					tdksignal(ttd, uap->sig, &ksi);
				}
			}
			PROC_UNLOCK(p);
		}
	} else {
		error = 0;
		ttd = tdfind((lwpid_t)uap->id, p->p_pid);
		if (ttd == NULL)
			return (ESRCH);
		if (uap->sig == 0)
			;
		else if (!_SIG_VALID(uap->sig))
			error = EINVAL;
		else 
			tdksignal(ttd, uap->sig, &ksi);
		PROC_UNLOCK(ttd->td_proc);
	}
	return (error);
}

int
sys_thr_kill2(struct thread *td, struct thr_kill2_args *uap)
    /* pid_t pid, long id, int sig */
{
	ksiginfo_t ksi;
	struct thread *ttd;
	struct proc *p;
	int error;

AUDIT_ARG_SIGNUM(uap->sig);

ksiginfo_init(&ksi);
	ksi.ksi_signo = uap->sig;
	ksi.ksi_code = SI_LWP;
	ksi.ksi_pid = td->td_proc->p_pid;
	ksi.ksi_uid = td->td_ucred->cr_ruid;
	if (uap->id == -1) {
		if ((p = pfind(uap->pid)) == NULL)
			return (ESRCH);
		AUDIT_ARG_PROCESS(p);
		error = p_cansignal(td, p, uap->sig);
		if (error) {
			PROC_UNLOCK(p);
			return (error);
		}
		if (uap->sig != 0 && !_SIG_VALID(uap->sig)) {
			error = EINVAL;
		} else {
			error = ESRCH;
			FOREACH_THREAD_IN_PROC(p, ttd) {
				if (ttd != td) {
					error = 0;
					if (uap->sig == 0)
						break;
					tdksignal(ttd, uap->sig, &ksi);
				}
			}
		}
		PROC_UNLOCK(p);
	} else {
		ttd = tdfind((lwpid_t)uap->id, uap->pid);
		if (ttd == NULL)
			return (ESRCH);
		p = ttd->td_proc;
		AUDIT_ARG_PROCESS(p);
		error = p_cansignal(td, p, uap->sig);
		if (uap->sig == 0)
			;
		else if (!_SIG_VALID(uap->sig))
			error = EINVAL;
		else
			tdksignal(ttd, uap->sig, &ksi);
		PROC_UNLOCK(p);
	}
	return (error);
}

int
sys_thr_suspend(struct thread *td, struct thr_suspend_args *uap)
	/* const struct timespec *timeout */
{
	struct timespec ts, *tsp;
	int error;

tsp = NULL;
	if (uap->timeout != NULL) {
		error = umtx_copyin_timeout(uap->timeout, &ts);
		if (error != 0)
			return (error);
		tsp = &ts;
	}

return (kern_thr_suspend(td, tsp));
}

int
kern_thr_suspend(struct thread *td, struct timespec *tsp)
{
	struct proc *p = td->td_proc;
	struct timeval tv;
	int error = 0;
	int timo = 0;

if (td->td_pflags & TDP_WAKEUP) {
		td->td_pflags &= ~TDP_WAKEUP;
		return (0);
	}

if (tsp != NULL) {
		if (tsp->tv_sec == 0 && tsp->tv_nsec == 0)
			error = EWOULDBLOCK;
		else {
			TIMESPEC_TO_TIMEVAL(&tv, tsp);
			timo = tvtohz(&tv);
		}
	}

PROC_LOCK(p);
	if (error == 0 && (td->td_flags & TDF_THRWAKEUP) == 0)
		error = msleep((void *)td, &p->p_mtx,
			 PCATCH, "lthr", timo);

if (td->td_flags & TDF_THRWAKEUP) {
		thread_lock(td);
		td->td_flags &= ~TDF_THRWAKEUP;
		thread_unlock(td);
		PROC_UNLOCK(p);
		return (0);
	}
	PROC_UNLOCK(p);
	if (error == EWOULDBLOCK)
		error = ETIMEDOUT;
	else if (error == ERESTART) {
		if (timo != 0)
			error = EINTR;
	}
	return (error);
}

int
sys_thr_wake(struct thread *td, struct thr_wake_args *uap)
	/* long id */
{
	struct proc *p;
	struct thread *ttd;

if (uap->id == td->td_tid) {
		td->td_pflags |= TDP_WAKEUP;
		return (0);
	}

p = td->td_proc;
	ttd = tdfind((lwpid_t)uap->id, p->p_pid);
	if (ttd == NULL)
		return (ESRCH);
	thread_lock(ttd);
	ttd->td_flags |= TDF_THRWAKEUP;
	thread_unlock(ttd);
	wakeup((void *)ttd);
	PROC_UNLOCK(p);
	return (0);
}

int
sys_thr_set_name(struct thread *td, struct thr_set_name_args *uap)
{
	struct proc *p;
	char name[MAXCOMLEN + 1];
	struct thread *ttd;
	int error;

error = 0;
	name[0] = '\0';
	if (uap->name != NULL) {
		error = copyinstr(uap->name, name, sizeof(name), NULL);
		if (error == ENAMETOOLONG) {
			error = copyin(uap->name, name, sizeof(name) - 1);
			name[sizeof(name) - 1] = '\0';
		}
		if (error)
			return (error);
	}
	p = td->td_proc;
	ttd = tdfind((lwpid_t)uap->id, p->p_pid);
	if (ttd == NULL)
		return (ESRCH);
	strcpy(ttd->td_name, name);
#ifdef HWPMC_HOOKS
	if (PMC_PROC_IS_USING_PMCS(p) || PMC_SYSTEM_SAMPLING_ACTIVE())
		PMC_CALL_HOOK_UNLOCKED(ttd, PMC_FN_THR_CREATE_LOG, NULL);
#endif
#ifdef KTR
	sched_clear_tdname(ttd);
#endif
	PROC_UNLOCK(p);
	return (error);
}

int
kern_thr_alloc(struct proc *p, int pages, struct thread **ntd)
{

/* Have race condition but it is cheap. */
	if (p->p_numthreads >= max_threads_per_proc) {
		++max_threads_hits;
		return (EPROCLIM);
	}

*ntd = thread_alloc(pages);
	if (*ntd == NULL)
		return (ENOMEM);

return (0);
}

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