diff options
Diffstat (limited to 'hurd/hurdsig.c')
| -rw-r--r-- | hurd/hurdsig.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/hurd/hurdsig.c b/hurd/hurdsig.c index b3808f9e49..78ea59d97d 100644 --- a/hurd/hurdsig.c +++ b/hurd/hurdsig.c @@ -477,9 +477,18 @@ _hurdsig_abort_rpcs (struct hurd_sigstate *ss, int signo, int sigthread, if (reply) { /* The interrupt didn't work. - Destroy the receive right the thread is blocked on. */ - __mach_port_destroy (__mach_task_self (), *reply); - *reply = MACH_PORT_NULL; + Destroy the receive right the thread is blocked on, and + replace it with a dead name to keep the name from reuse until + the therad is done with it. To do this atomically, first + insert a send right, and then destroy the receive right, + turning the send right into a dead name. */ + err = __mach_port_insert_right (__mach_task_self (), + *reply, *reply, + MACH_MSG_TYPE_MAKE_SEND); + assert_perror (err); + err = __mach_port_mod_refs (__mach_task_self (), *reply, + MACH_PORT_RIGHT_RECEIVE, -1); + assert_perror (err); } /* The system call return value register now contains |