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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genericproc |
29 | /** @addtogroup genericproc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef KERN_TASK_H_ |
35 | #ifndef KERN_TASK_H_ |
36 | #define KERN_TASK_H_ |
36 | #define KERN_TASK_H_ |
37 | 37 | ||
38 | #include <cpu.h> |
38 | #include <cpu.h> |
39 | #include <ipc/ipc.h> |
39 | #include <ipc/ipc.h> |
40 | #include <synch/spinlock.h> |
40 | #include <synch/spinlock.h> |
41 | #include <synch/mutex.h> |
41 | #include <synch/mutex.h> |
42 | #include <synch/rwlock.h> |
42 | #include <synch/rwlock.h> |
43 | #include <synch/futex.h> |
43 | #include <synch/futex.h> |
44 | #include <adt/avl.h> |
44 | #include <adt/avl.h> |
45 | #include <adt/btree.h> |
45 | #include <adt/btree.h> |
46 | #include <adt/list.h> |
46 | #include <adt/list.h> |
47 | #include <security/cap.h> |
47 | #include <security/cap.h> |
48 | #include <arch/proc/task.h> |
48 | #include <arch/proc/task.h> |
49 | #include <arch/proc/thread.h> |
49 | #include <arch/proc/thread.h> |
50 | #include <arch/context.h> |
50 | #include <arch/context.h> |
51 | #include <arch/fpu_context.h> |
51 | #include <arch/fpu_context.h> |
52 | #include <arch/cpu.h> |
52 | #include <arch/cpu.h> |
53 | #include <mm/tlb.h> |
53 | #include <mm/tlb.h> |
54 | #include <proc/scheduler.h> |
54 | #include <proc/scheduler.h> |
55 | #include <udebug/udebug.h> |
55 | #include <udebug/udebug.h> |
56 | 56 | ||
57 | struct thread; |
57 | struct thread; |
58 | 58 | ||
59 | /** Task structure. */ |
59 | /** Task structure. */ |
60 | typedef struct task { |
60 | typedef struct task { |
61 | /** Task's linkage for the tasks_tree AVL tree. */ |
61 | /** Task's linkage for the tasks_tree AVL tree. */ |
62 | avltree_node_t tasks_tree_node; |
62 | avltree_node_t tasks_tree_node; |
63 | 63 | ||
64 | /** Task lock. |
64 | /** Task lock. |
65 | * |
65 | * |
66 | * Must be acquired before threads_lock and thread lock of any of its |
66 | * Must be acquired before threads_lock and thread lock of any of its |
67 | * threads. |
67 | * threads. |
68 | */ |
68 | */ |
69 | SPINLOCK_DECLARE(lock); |
69 | SPINLOCK_DECLARE(lock); |
70 | 70 | ||
71 | char *name; |
71 | char *name; |
72 | /** List of threads contained in this task. */ |
72 | /** List of threads contained in this task. */ |
73 | link_t th_head; |
73 | link_t th_head; |
74 | /** Address space. */ |
74 | /** Address space. */ |
75 | as_t *as; |
75 | as_t *as; |
76 | /** Unique identity of task. */ |
76 | /** Unique identity of task. */ |
77 | task_id_t taskid; |
77 | task_id_t taskid; |
78 | /** Task security context. */ |
78 | /** Task security context. */ |
79 | context_id_t context; |
79 | context_id_t context; |
80 | 80 | ||
81 | /** Number of references (i.e. threads). */ |
81 | /** Number of references (i.e. threads). */ |
82 | atomic_t refcount; |
82 | atomic_t refcount; |
83 | /** Number of threads that haven't exited yet. */ |
83 | /** Number of threads that haven't exited yet. */ |
84 | atomic_t lifecount; |
84 | atomic_t lifecount; |
85 | 85 | ||
86 | /** Task capabilities. */ |
86 | /** Task capabilities. */ |
87 | cap_t capabilities; |
87 | cap_t capabilities; |
88 | 88 | ||
89 | /* IPC stuff */ |
89 | /* IPC stuff */ |
90 | answerbox_t answerbox; /**< Communication endpoint */ |
90 | answerbox_t answerbox; /**< Communication endpoint */ |
91 | phone_t phones[IPC_MAX_PHONES]; |
91 | phone_t phones[IPC_MAX_PHONES]; |
92 | /** |
92 | /** |
93 | * Active asynchronous messages. It is used for limiting uspace to |
93 | * Active asynchronous messages. It is used for limiting uspace to |
94 | * certain extent. |
94 | * certain extent. |
95 | */ |
95 | */ |
96 | atomic_t active_calls; |
96 | atomic_t active_calls; |
97 | 97 | ||
98 | /** Debugging stuff */ |
98 | /** Debugging stuff */ |
99 | udebug_task_state_t dt_state; |
99 | udebug_task_state_t dt_state; |
100 | call_t *debug_begin_call; |
100 | call_t *debug_begin_call; |
101 | int not_stoppable_count; |
101 | int not_stoppable_count; |
102 | struct task *debugger; |
102 | struct task *debugger; |
103 | udebug_evmask_t debug_evmask; |
103 | udebug_evmask_t debug_evmask; |
104 | 104 | ||
105 | /** Kernel answerbox */ |
105 | /** Kernel answerbox */ |
106 | answerbox_t kernel_box; |
106 | answerbox_t kernel_box; |
107 | /** Thread used to service kernel answerbox */ |
107 | /** Thread used to service kernel answerbox */ |
108 | struct thread *kb_thread; |
108 | struct thread *kb_thread; |
- | 109 | /** Kbox thread creation vs. begin of cleanup mutual exclusion */ |
|
- | 110 | SPINLOCK_DECLARE(kb_cleanup_lock); |
|
109 | /** True if kb_thread != NULL or is being prepared */ |
111 | /** True if cleanup of kbox has already started */ |
- | 112 | bool kb_finished; |
|
- | 113 | /** Used for waiting on kbox thread shutdown */ |
|
110 | bool kb_thread_at_hand; |
114 | waitq_t kb_thread_shutdown_wq; |
111 | 115 | ||
112 | /** Architecture specific task data. */ |
116 | /** Architecture specific task data. */ |
113 | task_arch_t arch; |
117 | task_arch_t arch; |
114 | 118 | ||
115 | /** |
119 | /** |
116 | * Serializes access to the B+tree of task's futexes. This mutex is |
120 | * Serializes access to the B+tree of task's futexes. This mutex is |
117 | * independent on the task spinlock. |
121 | * independent on the task spinlock. |
118 | */ |
122 | */ |
119 | mutex_t futexes_lock; |
123 | mutex_t futexes_lock; |
120 | /** B+tree of futexes referenced by this task. */ |
124 | /** B+tree of futexes referenced by this task. */ |
121 | btree_t futexes; |
125 | btree_t futexes; |
122 | 126 | ||
123 | /** Accumulated accounting. */ |
127 | /** Accumulated accounting. */ |
124 | uint64_t cycles; |
128 | uint64_t cycles; |
125 | } task_t; |
129 | } task_t; |
126 | 130 | ||
127 | SPINLOCK_EXTERN(tasks_lock); |
131 | SPINLOCK_EXTERN(tasks_lock); |
128 | extern avltree_t tasks_tree; |
132 | extern avltree_t tasks_tree; |
129 | 133 | ||
130 | extern void task_init(void); |
134 | extern void task_init(void); |
131 | extern void task_done(void); |
135 | extern void task_done(void); |
132 | extern task_t *task_create(as_t *as, char *name); |
136 | extern task_t *task_create(as_t *as, char *name); |
133 | extern void task_destroy(task_t *t); |
137 | extern void task_destroy(task_t *t); |
134 | extern task_t *task_run_program(void *program_addr, char *name); |
138 | extern task_t *task_run_program(void *program_addr, char *name); |
135 | extern task_t *task_find_by_id(task_id_t id); |
139 | extern task_t *task_find_by_id(task_id_t id); |
136 | extern int task_kill(task_id_t id); |
140 | extern int task_kill(task_id_t id); |
137 | extern uint64_t task_get_accounting(task_t *t); |
141 | extern uint64_t task_get_accounting(task_t *t); |
138 | 142 | ||
139 | extern void cap_set(task_t *t, cap_t caps); |
143 | extern void cap_set(task_t *t, cap_t caps); |
140 | extern cap_t cap_get(task_t *t); |
144 | extern cap_t cap_get(task_t *t); |
141 | 145 | ||
142 | #ifndef task_create_arch |
146 | #ifndef task_create_arch |
143 | extern void task_create_arch(task_t *t); |
147 | extern void task_create_arch(task_t *t); |
144 | #endif |
148 | #endif |
145 | 149 | ||
146 | #ifndef task_destroy_arch |
150 | #ifndef task_destroy_arch |
147 | extern void task_destroy_arch(task_t *t); |
151 | extern void task_destroy_arch(task_t *t); |
148 | #endif |
152 | #endif |
149 | 153 | ||
150 | extern unative_t sys_task_get_id(task_id_t *uspace_task_id); |
154 | extern unative_t sys_task_get_id(task_id_t *uspace_task_id); |
151 | 155 | ||
152 | #endif |
156 | #endif |
153 | 157 | ||
154 | /** @} |
158 | /** @} |
155 | */ |
159 | */ |
156 | 160 |