1 /* Deallocate the kernel thread resources. Mach version.
2 Copyright (C) 2000-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
23 #include <mach/mig_support.h>
25 #include <pt-internal.h>
27 /* Terminate the kernel thread associated with THREAD, and deallocate its
28 right reference and its stack. The function also drops a reference
31 __pthread_thread_terminate (struct __pthread
*thread
)
33 thread_t kernel_thread
, self_ktid
;
34 mach_port_t wakeup_port
, reply_port
;
40 kernel_thread
= thread
->kernel_thread
;
44 stackaddr
= thread
->stackaddr
;
45 stacksize
= ((thread
->guardsize
+ __vm_page_size
- 1)
46 / __vm_page_size
) * __vm_page_size
+ thread
->stacksize
;
54 wakeup_port
= thread
->wakeupmsg
.msgh_remote_port
;
56 self_ktid
= __mach_thread_self ();
57 self
= self_ktid
== kernel_thread
;
58 __mach_port_deallocate (__mach_task_self (), self_ktid
);
60 /* The kernel thread won't be there any more. */
61 thread
->kernel_thread
= MACH_PORT_DEAD
;
63 /* Release thread resources. */
64 __pthread_dealloc (thread
);
66 /* The wake up port (needed for locks in __pthread_dealloc) is now no longer
68 __mach_port_destroy (__mach_task_self (), wakeup_port
);
70 /* Each thread has its own reply port, allocated from MiG stub code calling
71 __mig_get_reply_port. Destroying it is a bit tricky because the calls
72 involved are also RPCs, causing the creation of a new reply port if
73 currently null. The __thread_terminate_release call is actually a one way
74 simple routine designed not to require a reply port. */
75 reply_port
= self
? __mig_get_reply_port () : MACH_PORT_NULL
;
76 /* From here we shall not use a MIG reply port any more. */
78 /* Finally done with the thread structure (we still needed it to access the
80 __pthread_dealloc_finish (thread
);
82 /* Terminate and release all that's left. */
83 err
= __thread_terminate_release (kernel_thread
, mach_task_self (),
84 kernel_thread
, reply_port
,
85 (vm_address_t
) stackaddr
, stacksize
);
87 /* The kernel does not support it yet. Leak but at least terminate
89 err
= __thread_terminate (kernel_thread
);
91 /* We are out of luck. */