diff options
| author | Thomas Bushnell <thomas@gnu.org> | 1999-05-04 17:05:27 +0000 |
|---|---|---|
| committer | Thomas Bushnell <thomas@gnu.org> | 1999-05-04 17:05:27 +0000 |
| commit | 0f07be8955c4febfd2662e222f0371c8a92ae1d2 (patch) | |
| tree | ef01b3aedfa5265ef882c7e2eeab0289278b3b1e | |
| parent | d7929458f96268c914dcf886e8fae5fa2ba00a3a (diff) | |
1999-05-01 Mark Kettenis <kettenis@gnu.org>
* msg.c (check_msgport_death): New function.
(S_proc_getmsgport): Use it.
* proc.h (check_msgport_death): Provide prototype.
* info.c (S_proc_getprocinfo): Call check_msgport_death to make
sure that our knowledge about P's message port is up to date.
| -rw-r--r-- | proc/ChangeLog | 8 | ||||
| -rw-r--r-- | proc/info.c | 4 | ||||
| -rw-r--r-- | proc/msg.c | 45 | ||||
| -rw-r--r-- | proc/proc.h | 1 |
4 files changed, 40 insertions, 18 deletions
diff --git a/proc/ChangeLog b/proc/ChangeLog index 9ed123f8..2fa1f662 100644 --- a/proc/ChangeLog +++ b/proc/ChangeLog @@ -1,3 +1,11 @@ +1999-05-01 Mark Kettenis <kettenis@gnu.org> + + * msg.c (check_msgport_death): New function. + (S_proc_getmsgport): Use it. + * proc.h (check_msgport_death): Provide prototype. + * info.c (S_proc_getprocinfo): Call check_msgport_death to make + sure that our knowledge about P's message port is up to date. + 1999-05-02 Roland McGrath <roland@baalperazim.frob.com> * main.c: Include <error.h>. diff --git a/proc/info.c b/proc/info.c index c44bde6a..1a398461 100644 --- a/proc/info.c +++ b/proc/info.c @@ -376,7 +376,9 @@ S_proc_getprocinfo (struct proc *callerp, return ESRCH; task = p->p_task; - msgport = p->p_deadmsg ? MACH_PORT_NULL : p->p_msgport; + + check_msgport_death (p); + msgport = p->p_msgport; if (*flags & PI_FETCH_THREAD_DETAILS) *flags |= PI_FETCH_THREADS; @@ -82,6 +82,32 @@ check_message_dying (struct proc *p, struct proc *dyingp) } } +/* Check if the message port of process P has died. Return nonzero if + this has indeed happened. */ +int +check_msgport_death (struct proc *p) +{ + /* Only check if the message port passed away, if we know that it + was ever alive. */ + if (p->p_msgport != MACH_PORT_NULL) + { + mach_port_type_t type; + error_t err; + + err = mach_port_type (mach_task_self (), p->p_msgport, &type); + if (err || (type & MACH_PORT_TYPE_DEAD_NAME)) + { + /* The port appears to be dead; throw it away. */ + mach_port_deallocate (mach_task_self (), p->p_msgport); + p->p_msgport = MACH_PORT_NULL; + p->p_deadmsg = 1; + return 1; + } + } + + return 0; +} + error_t S_proc_getmsgport (struct proc *callerp, mach_port_t reply_port, @@ -113,23 +139,8 @@ restart: if (!p) return ESRCH; - /* Only check if the message port passed away, if we know that it - was ever alive. */ - if (p->p_msgport != MACH_PORT_NULL) - { - mach_port_type_t type; - error_t err; - - err = mach_port_type (mach_task_self (), p->p_msgport, &type); - if (err || (type & MACH_PORT_TYPE_DEAD_NAME)) - { - /* The port appears to be dead; throw it away. */ - mach_port_deallocate (mach_task_self (), p->p_msgport); - p->p_msgport = MACH_PORT_NULL; - p->p_deadmsg = 1; - goto restart; - } - } + if (check_msgport_death (p)) + goto restart; *msgport = p->p_msgport; diff --git a/proc/proc.h b/proc/proc.h index d591b4ea..1190d99e 100644 --- a/proc/proc.h +++ b/proc/proc.h @@ -165,6 +165,7 @@ int genpid (); void abort_getmsgport (struct proc *); int zombie_check_pid (pid_t); void check_message_dying (struct proc *, struct proc *); +int check_msgport_death (struct proc *); void check_dead_execdata_notify (mach_port_t); void add_proc_to_hash (struct proc *); |