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Diffstat (limited to 'proc/mgt.c')
-rw-r--r--proc/mgt.c112
1 files changed, 57 insertions, 55 deletions
diff --git a/proc/mgt.c b/proc/mgt.c
index 08203bb3..a9d24c5b 100644
--- a/proc/mgt.c
+++ b/proc/mgt.c
@@ -95,7 +95,7 @@ S_proc_reauthenticate (struct proc *p, mach_port_t rendport)
ngen_uids = naux_uids = 50;
ngen_gids = naux_gids = 50;
- err = auth_server_authenticate (authserver, p->p_reqport,
+ err = auth_server_authenticate (authserver, ports_get_right (p),
MACH_MSG_TYPE_MAKE_SEND,
rendport, MACH_MSG_TYPE_MOVE_SEND,
MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND,
@@ -210,15 +210,12 @@ S_proc_reassign (struct proc *p,
/* For security, we need use the request port from STUBP, and
not inherit this state. */
- mach_port_mod_refs (mach_task_self (), p->p_reqport,
- MACH_PORT_RIGHT_RECEIVE, -1);
- p->p_reqport = stubp->p_reqport;
- stubp->p_reqport = MACH_PORT_NULL; /* Protect from process_has_exited. */
- mach_port_mod_refs (mach_task_self (), p->p_reqport,
- MACH_PORT_RIGHT_RECEIVE, 1);
+ ports_reallocate_from_external (p, ports_claim_right (stubp));
+ /* Redirect the task-death notification to the new receive right. */
mach_port_request_notification (mach_task_self (), p->p_task,
- MACH_NOTIFY_DEAD_NAME, 1, p->p_reqport,
+ MACH_NOTIFY_DEAD_NAME, 1,
+ ports_get_right (p),
MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
if (foo)
mach_port_deallocate (mach_task_self (), foo);
@@ -325,6 +322,14 @@ S_proc_dostop (struct proc *p,
return 0;
}
+/* Clean state of E before it is deallocated */
+void
+exc_clean (void *arg)
+{
+ struct exc *e = arg;
+ mach_port_deallocate (mach_task_self (), e->forwardport);
+}
+
/* Implement proc_handle_exceptions as described in <hurd/process.defs>. */
kern_return_t
S_proc_handle_exceptions (struct proc *p,
@@ -334,23 +339,19 @@ S_proc_handle_exceptions (struct proc *p,
thread_state_t new_state,
mach_msg_type_number_t statecnt)
{
- struct exc *e = malloc (sizeof (struct exc)
- + (statecnt * sizeof (natural_t)));
- mach_port_t foo;
+ struct exc *e;
+ error_t err;
- mach_port_request_notification (mach_task_self (), msgport,
- MACH_NOTIFY_NO_SENDERS, 1, msgport,
- MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
- if (foo)
- mach_port_deallocate (mach_task_self (), foo);
+ err = ports_import_port (exc_class, proc_bucket, msgport,
+ (sizeof (struct exc)
+ + (statecnt * sizeof (natural_t))), &e);
+ if (err)
+ return err;
- mach_port_move_member (mach_task_self (), msgport, request_portset);
- e->excport = msgport;
e->forwardport = forwardport;
e->flavor = flavor;
e->statecnt = statecnt;
bcopy (new_state, e->thread_state, statecnt * sizeof (natural_t));
- add_exc_to_hash (e);
return 0;
}
@@ -369,15 +370,18 @@ S_proc_exception_raise (mach_port_t excport,
{
error_t err;
struct proc *p;
- struct exc *e = exc_find (excport);
+ struct exc *e = ports_lookup_port (proc_bucket, excport, exc_class);
if (!e)
return EOPNOTSUPP;
p = task_find (task);
if (! p)
- /* Bogus RPC. */
- return EINVAL;
-
+ {
+ /* Bogus RPC. */
+ ports_port_deref (e);
+ return EINVAL;
+ }
+
/* Try to forward the message. */
err = proc_exception_raise (e->forwardport,
reply, reply_type, MACH_SEND_NOTIFY,
@@ -395,6 +399,7 @@ S_proc_exception_raise (mach_port_t excport,
the faulting thread's state to run its recovery code, which should
dequeue that message. */
err = thread_set_state (thread, e->flavor, e->thread_state, e->statecnt);
+ ports_port_deref (e);
return MIG_NO_REPLY;
default:
@@ -416,8 +421,10 @@ S_proc_exception_raise (mach_port_t excport,
/* Nuke the task; we will get a notification message and report it
died with SIGNO. */
task_terminate (task);
+ ports_port_deref (e);
return 0;
}
+
}
/* Implement proc_getallpids as described in <hurd/proc.defs>. */
@@ -460,7 +467,6 @@ struct proc *
new_proc (task_t task)
{
struct proc *p;
- mach_port_t foo;
/* Because these have a reference count of one before starting,
they can never be freed, so we're safe. */
@@ -478,20 +484,10 @@ new_proc (task_t task)
all other processes inherit from init here (though proc_child
will move them to their actual parent usually). */
- p = malloc (sizeof (struct proc));
- mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
- &p->p_reqport);
- mach_port_move_member (mach_task_self (), p->p_reqport,
- request_portset);
+ ports_create_port (proc_class, proc_bucket, sizeof (struct proc), &p);
p->p_pid = genpid ();
p->p_task = task;
- mach_port_request_notification (mach_task_self (), p->p_task,
- MACH_NOTIFY_DEAD_NAME, 1, p->p_reqport,
- MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
- if (foo != MACH_PORT_NULL)
- mach_port_deallocate (mach_task_self (), foo);
-
switch (p->p_pid)
{
@@ -581,6 +577,7 @@ new_proc (task_t task)
p->p_deadmsg = (p->p_pid == 1);
p->p_checkmsghangs = 0;
p->p_msgportwait = 0;
+ p->p_dead = 0;
if (p->p_pid > 1)
{
@@ -591,8 +588,9 @@ new_proc (task_t task)
return p;
}
-/* The task associated with process P has died. Free everything, and
- record our presence in the zombie table, then return wait if necessary. */
+/* The task associated with process P has died. Drop most state,
+ and then record us as dead. Our parent will eventually complete the
+ deallocation. */
void
process_has_exited (struct proc *p)
{
@@ -600,12 +598,8 @@ process_has_exited (struct proc *p)
prociterate ((void (*) (struct proc *, void *))check_message_dying, p);
- mach_port_mod_refs (mach_task_self (), p->p_reqport,
- MACH_PORT_RIGHT_RECEIVE, -1);
-
- remove_proc_from_hash (p);
-
- mach_port_deallocate (mach_task_self (), p->p_task);
+ /* Nuke external send rights and the (possible) associated reference */
+ ports_destroy_right (p);
if (!--p->p_login->l_refcnt)
free (p->p_login);
@@ -642,7 +636,21 @@ process_has_exited (struct proc *p)
p->p_ochild->p_prevsib = &startup_proc->p_ochild;
}
- reparent_zombies (p);
+ if (p->p_waiting || p->p_msgportwait)
+ condition_broadcast (&p->p_wakeup);
+
+ p->p_dead = 1;
+}
+
+void
+complete_exit (struct proc *p)
+{
+ assert (p->p_dead);
+ assert (p->p_waited);
+
+ remove_proc_from_hash (p);
+ if (p->p_task != MACH_PORT_NULL)
+ mach_port_deallocate (mach_task_self (), p->p_task);
/* Remove us from our parent's list of children. */
if (p->p_sib)
@@ -651,19 +659,13 @@ process_has_exited (struct proc *p)
leave_pgrp (p);
- mach_port_deallocate (mach_task_self (), p->p_msgport);
-
- if (p->p_waiting)
- mach_port_deallocate (mach_task_self (),
- p->p_continuation.wait_c.reply_port);
- if (p->p_msgportwait)
- mach_port_deallocate (mach_task_self (),
- p->p_continuation.getmsgport_c.reply_port);
-
- free (p);
+ /* Drop the reference we created long ago in new_proc. The only
+ other references that ever show up are those for RPC args, which
+ will shortly vanish (because we are p_dead, those routines do
+ nothing). */
+ ports_port_deref (p);
}
-
/* Get the list of all tasks from the kernel and start adding them.
If we encounter TASK, then don't do any more and return its proc.
If TASK is null or we never find it, then return 0. */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 02:10:30 +0000