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Tweak the in-kernel API for sending signals to threads:
- Rename tdsignal() to tdsendsignal() and make it private to kern_sig.c. - Add tdsignal() and tdksignal() routines that mirror psignal() and pksignal() except that they accept a thread as an argument instead of a process. They send a signal to a specific thread rather than to an individual process. Reviewed by: kib
This commit is contained in:
parent
cfbcffa248
commit
ad6eec7b9e
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=209592
@ -501,7 +501,7 @@ linux_rt_sigtimedwait(struct thread *td,
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/* Repost if we got an error. */
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if (error && info.ksi_signo) {
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PROC_LOCK(td->td_proc);
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tdsignal(td->td_proc, td, info.ksi_signo, &info);
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tdksignal(td, info.ksi_signo, &info);
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PROC_UNLOCK(td->td_proc);
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} else
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td->td_retval[0] = info.ksi_signo;
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@ -587,7 +587,7 @@ linux_do_tkill(struct thread *td, l_int tgid, l_int pid, l_int signum)
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ksi.ksi_pid = proc->p_pid;
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ksi.ksi_uid = proc->p_ucred->cr_ruid;
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error = tdsignal(p, NULL, ksi.ksi_signo, &ksi);
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error = pksignal(p, ksi.ksi_signo, &ksi);
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out:
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PROC_UNLOCK(p);
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@ -755,13 +755,13 @@ do_execve(td, args, mac_p)
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/*
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* If tracing the process, trap to debugger so breakpoints
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* can be set before the program executes.
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* Use tdsignal to deliver signal to current thread, use
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* Use tdsignal to deliver signal to current thread, using
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* psignal may cause the signal to be delivered to wrong thread
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* because that thread will exit, remember we are going to enter
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* single thread mode.
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*/
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if (p->p_flag & P_TRACED)
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tdsignal(p, td, SIGTRAP, NULL);
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tdsignal(td, SIGTRAP);
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/* clear "fork but no exec" flag, as we _are_ execing */
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p->p_acflag &= ~AFORK;
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@ -732,7 +732,7 @@ proc_reap(struct thread *td, struct proc *p, int *status, int options,
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p->p_oppid = 0;
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proc_reparent(p, t);
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PROC_UNLOCK(p);
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tdsignal(t, NULL, SIGCHLD, p->p_ksi);
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pksignal(t, SIGCHLD, p->p_ksi);
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wakeup(t);
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cv_broadcast(&p->p_pwait);
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PROC_UNLOCK(t);
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@ -107,6 +107,8 @@ static int killpg1(struct thread *td, int sig, int pgid, int all,
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ksiginfo_t *ksi);
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static int issignal(struct thread *td, int stop_allowed);
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static int sigprop(int sig);
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static int tdsendsignal(struct proc *p, struct thread *td, int sig,
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ksiginfo_t *ksi);
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static void tdsigwakeup(struct thread *, int, sig_t, int);
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static void sig_suspend_threads(struct thread *, struct proc *, int);
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static int filt_sigattach(struct knote *kn);
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@ -1797,7 +1799,7 @@ sigqueue(struct thread *td, struct sigqueue_args *uap)
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ksi.ksi_pid = td->td_proc->p_pid;
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ksi.ksi_uid = td->td_ucred->cr_ruid;
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ksi.ksi_value.sival_ptr = uap->value;
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error = tdsignal(p, NULL, ksi.ksi_signo, &ksi);
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error = pksignal(p, ksi.ksi_signo, &ksi);
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}
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PROC_UNLOCK(p);
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return (error);
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@ -1907,7 +1909,7 @@ trapsignal(struct thread *td, ksiginfo_t *ksi)
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mtx_unlock(&ps->ps_mtx);
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p->p_code = code; /* XXX for core dump/debugger */
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p->p_sig = sig; /* XXX to verify code */
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tdsignal(p, td, sig, ksi);
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tdsendsignal(p, td, sig, ksi);
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}
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PROC_UNLOCK(p);
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}
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@ -1962,14 +1964,14 @@ psignal(struct proc *p, int sig)
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ksiginfo_init(&ksi);
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ksi.ksi_signo = sig;
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ksi.ksi_code = SI_KERNEL;
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(void) tdsignal(p, NULL, sig, &ksi);
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(void) tdsendsignal(p, NULL, sig, &ksi);
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}
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void
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int
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pksignal(struct proc *p, int sig, ksiginfo_t *ksi)
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{
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(void) tdsignal(p, NULL, sig, ksi);
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return (tdsendsignal(p, NULL, sig, ksi));
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}
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int
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@ -1992,11 +1994,29 @@ psignal_event(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi)
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if (td == NULL)
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return (ESRCH);
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}
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return (tdsignal(p, td, ksi->ksi_signo, ksi));
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return (tdsendsignal(p, td, ksi->ksi_signo, ksi));
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}
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int
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tdsignal(struct proc *p, struct thread *td, int sig, ksiginfo_t *ksi)
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void
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tdsignal(struct thread *td, int sig)
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{
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ksiginfo_t ksi;
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ksiginfo_init(&ksi);
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ksi.ksi_signo = sig;
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ksi.ksi_code = SI_KERNEL;
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(void) tdsendsignal(td->td_proc, td, sig, &ksi);
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}
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void
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tdksignal(struct thread *td, int sig, ksiginfo_t *ksi)
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{
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(void) tdsendsignal(td->td_proc, td, sig, ksi);
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}
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static int
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tdsendsignal(struct proc *p, struct thread *td, int sig, ksiginfo_t *ksi)
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{
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sig_t action;
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sigqueue_t *sigqueue;
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@ -2882,7 +2902,7 @@ sigparent(struct proc *p, int reason, int status)
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if (KSI_ONQ(p->p_ksi))
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return;
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}
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tdsignal(p->p_pptr, NULL, SIGCHLD, p->p_ksi);
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pksignal(p->p_pptr, SIGCHLD, p->p_ksi);
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}
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static void
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@ -326,7 +326,7 @@ thr_kill(struct thread *td, struct thr_kill_args *uap)
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error = 0;
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if (uap->sig == 0)
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break;
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tdsignal(p, ttd, uap->sig, &ksi);
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tdksignal(ttd, uap->sig, &ksi);
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}
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}
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}
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@ -342,7 +342,7 @@ thr_kill(struct thread *td, struct thr_kill_args *uap)
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else if (!_SIG_VALID(uap->sig))
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error = EINVAL;
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else
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tdsignal(p, ttd, uap->sig, &ksi);
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tdksignal(ttd, uap->sig, &ksi);
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}
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PROC_UNLOCK(p);
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return (error);
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@ -384,8 +384,7 @@ thr_kill2(struct thread *td, struct thr_kill2_args *uap)
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error = 0;
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if (uap->sig == 0)
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break;
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tdsignal(p, ttd, uap->sig,
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&ksi);
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tdksignal(ttd, uap->sig, &ksi);
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}
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}
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}
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@ -401,7 +400,7 @@ thr_kill2(struct thread *td, struct thr_kill2_args *uap)
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else if (!_SIG_VALID(uap->sig))
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error = EINVAL;
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else
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tdsignal(p, ttd, uap->sig, &ksi);
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tdksignal(ttd, uap->sig, &ksi);
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}
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}
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PROC_UNLOCK(p);
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@ -330,7 +330,7 @@ int cursig(struct thread *td, int stop_allowed);
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void execsigs(struct proc *p);
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void gsignal(int pgid, int sig, ksiginfo_t *ksi);
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void killproc(struct proc *p, char *why);
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void pksignal(struct proc *p, int sig, ksiginfo_t *ksi);
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int pksignal(struct proc *p, int sig, ksiginfo_t *ksi);
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void pgsigio(struct sigio **, int signum, int checkctty);
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void pgsignal(struct pgrp *pgrp, int sig, int checkctty, ksiginfo_t *ksi);
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int postsig(int sig);
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@ -346,8 +346,8 @@ int sig_ffs(sigset_t *set);
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void siginit(struct proc *p);
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void signotify(struct thread *td);
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void tdsigcleanup(struct thread *td);
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int tdsignal(struct proc *p, struct thread *td, int sig,
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ksiginfo_t *ksi);
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void tdsignal(struct thread *td, int sig);
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void tdksignal(struct thread *td, int sig, ksiginfo_t *ksi);
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void trapsignal(struct thread *td, ksiginfo_t *);
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int ptracestop(struct thread *td, int sig);
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ksiginfo_t * ksiginfo_alloc(int);
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