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Add thr_kill2 syscall which sends a signal to a thread in another process.

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Submitted by: Tijl Coosemans tijl at ulyssis dot org
Approved by: re (kensmith)
This commit is contained in:
David Xu 2007-08-16 05:26:42 +00:00
parent 2dad8a55be
commit 0b1f0611b4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=171859
3 changed files with 69 additions and 0 deletions
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55
sys/kern/kern_thr.c
View File

@ -53,6 +53,8 @@ __FBSDID("$FreeBSD$");
#include <machine/frame.h>
#include <security/audit/audit.h>
#ifdef COMPAT_IA32
extern struct sysentvec ia32_freebsd_sysvec;
@ -336,6 +338,59 @@ thr_kill(struct thread *td, struct thr_kill_args *uap)
return (error);
}
int
thr_kill2(struct thread *td, struct thr_kill2_args *uap)
/* pid_t pid, long id, int sig */
{
struct thread *ttd;
struct proc *p;
int error;
AUDIT_ARG(signum, uap->sig);
if (uap->pid == td->td_proc->p_pid) {
p = td->td_proc;
PROC_LOCK(p);
} else if ((p = pfind(uap->pid)) == NULL) {
return (ESRCH);
}
AUDIT_ARG(process, p);
error = p_cansignal(td, p, uap->sig);
if (error == 0) {
if (uap->id == -1) {
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;
tdsignal(p, ttd, uap->sig, NULL);
}
}
}
} else {
if (uap->id != td->td_tid)
ttd = thread_find(p, uap->id);
else
ttd = td;
if (ttd == NULL)
error = ESRCH;
else if (uap->sig == 0)
;
else if (!_SIG_VALID(uap->sig))
error = EINVAL;
else
tdsignal(p, ttd, uap->sig, NULL);
}
}
PROC_UNLOCK(p);
return (error);
}
int
thr_suspend(struct thread *td, struct thr_suspend_args *uap)
/* const struct timespec *timeout */

1
sys/kern/syscalls.master
View File

@ -846,5 +846,6 @@
int whence); }
479 AUE_TRUNCATE STD { int truncate(char *path, off_t length); }
480 AUE_FTRUNCATE STD { int ftruncate(int fd, off_t length); }
481 AUE_KILL STD { int thr_kill2(pid_t pid, long id, int sig); }
; Please copy any additions and changes to the following compatability tables:
; sys/compat/freebsd32/syscalls.master

13
sys/sys/thr.h
View File

@ -30,8 +30,14 @@
#ifndef _SYS_THR_H_
#define _SYS_THR_H_
#include <sys/_types.h>
#include <sys/sched.h>
#ifndef _SIZE_T_DECLARED
typedef __size_t size_t;
#define _SIZE_T_DECLARED
#endif
/* Create the thread in the suspended state. */
#define THR_SUSPENDED 0x0001
/* Create the system scope thread. */
@ -55,12 +61,19 @@ struct thr_param {
* See pthread_*
*/
#ifndef _KERNEL
#include <sys/ucontext.h>
#ifndef _PID_T_DECLARED
typedef __pid_t pid_t;
#define _PID_T_DECLARED
#endif
int thr_create(ucontext_t *ctx, long *id, int flags);
int thr_new(struct thr_param *param, int param_size);
int thr_self(long *id);
void thr_exit(long *state);
int thr_kill(long id, int sig);
int thr_kill2(pid_t pid, long id, int sig);
int thr_suspend(const struct timespec *timeout);
int thr_wake(long id);
int thr_set_name(long id, const char *name);