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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jiri Svoboda |
2 | * Copyright (c) 2008 Jiri Svoboda |
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 generic |
29 | /** @addtogroup generic |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief Udebug operations. |
35 | * @brief Udebug operations. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <console/klog.h> |
38 | #include <console/klog.h> |
39 | #include <proc/task.h> |
39 | #include <proc/task.h> |
40 | #include <proc/thread.h> |
40 | #include <proc/thread.h> |
41 | #include <arch.h> |
41 | #include <arch.h> |
42 | #include <errno.h> |
42 | #include <errno.h> |
43 | #include <syscall/copy.h> |
43 | #include <syscall/copy.h> |
44 | #include <ipc/ipc.h> |
44 | #include <ipc/ipc.h> |
45 | #include <udebug/udebug.h> |
45 | #include <udebug/udebug.h> |
46 | #include <udebug/udebug_ops.h> |
46 | #include <udebug/udebug_ops.h> |
47 | 47 | ||
48 | /** |
48 | /** |
49 | * Prepare a thread for a debugging operation. |
49 | * Prepare a thread for a debugging operation. |
50 | * |
50 | * |
51 | * Simply put, return thread t with t->udebug.lock held, |
51 | * Simply put, return thread t with t->udebug.lock held, |
52 | * but only if it verifies all conditions. |
52 | * but only if it verifies all conditions. |
53 | * |
53 | * |
54 | * Specifically, verifies that thread t exists, is a userspace thread, |
54 | * Specifically, verifies that thread t exists, is a userspace thread, |
55 | * and belongs to the current task (TASK). Verifies, that the thread |
55 | * and belongs to the current task (TASK). Verifies, that the thread |
56 | * has (or hasn't) go according to having_go (typically false). |
56 | * has (or hasn't) go according to having_go (typically false). |
57 | * It also locks t->udebug.lock, making sure that t->udebug.debug_active is true |
57 | * It also locks t->udebug.lock, making sure that t->udebug.debug_active |
58 | * - that the thread is in a valid debugging session. |
58 | * is true - that the thread is in a valid debugging session. |
59 | * |
59 | * |
60 | * Returns EOK if all went well, or an error code otherwise. |
60 | * With this verified and the t->udebug.lock mutex held, it is ensured |
61 | * Interrupts must be already disabled when calling this function. |
61 | * that the thread cannot leave the debugging session, let alone cease |
- | 62 | * to exist. |
|
- | 63 | * |
|
- | 64 | * In this function, holding the TASK->udebug.lock mutex prevents the |
|
- | 65 | * thread from leaving the debugging session, while relaxing from |
|
- | 66 | * the t->lock spinlock to the t->udebug.lock mutex. |
|
62 | * |
67 | * |
63 | * Note: This function sports complicated locking. |
68 | * Returns EOK if all went well, or an error code otherwise. |
64 | */ |
69 | */ |
65 | static int _thread_op_begin(thread_t *t, bool having_go) |
70 | static int _thread_op_begin(thread_t *t, bool having_go) |
66 | { |
71 | { |
67 | int rc; |
- | |
68 | task_id_t taskid; |
72 | task_id_t taskid; |
- | 73 | ipl_t ipl; |
|
69 | 74 | ||
70 | taskid = TASK->taskid; |
75 | taskid = TASK->taskid; |
71 | 76 | ||
- | 77 | mutex_lock(&TASK->udebug.lock); |
|
- | 78 | ||
72 | /* Must lock threads_lock to ensure continued existence of the thread */ |
79 | /* thread_exists() must be called with threads_lock held */ |
- | 80 | ipl = interrupts_disable(); |
|
73 | spinlock_lock(&threads_lock); |
81 | spinlock_lock(&threads_lock); |
74 | 82 | ||
75 | if (!thread_exists(t)) { |
83 | if (!thread_exists(t)) { |
76 | spinlock_unlock(&threads_lock); |
84 | spinlock_unlock(&threads_lock); |
- | 85 | interrupts_restore(ipl); |
|
- | 86 | mutex_unlock(&TASK->udebug.lock); |
|
77 | return ENOENT; |
87 | return ENOENT; |
78 | } |
88 | } |
79 | 89 | ||
80 | spinlock_lock(&t->udebug.lock); |
90 | /* t->lock is enough to ensure the thread's existence */ |
81 | spinlock_lock(&t->lock); |
91 | spinlock_lock(&t->lock); |
82 | - | ||
83 | /* Now verify that it's the current task */ |
- | |
84 | if (t->task != TASK) { |
- | |
85 | /* No such thread belonging to callee */ |
92 | spinlock_unlock(&threads_lock); |
86 | rc = ENOENT; |
- | |
87 | goto error_exit; |
- | |
88 | } |
- | |
89 | 93 | ||
90 | /* Verify that 't' is a userspace thread */ |
94 | /* Verify that 't' is a userspace thread */ |
91 | if ((t->flags & THREAD_FLAG_USPACE) == 0) { |
95 | if ((t->flags & THREAD_FLAG_USPACE) == 0) { |
92 | /* It's not, deny its existence */ |
96 | /* It's not, deny its existence */ |
- | 97 | spinlock_unlock(&t->lock); |
|
93 | rc = ENOENT; |
98 | interrupts_restore(ipl); |
- | 99 | mutex_unlock(&TASK->udebug.lock); |
|
94 | goto error_exit; |
100 | return ENOENT; |
95 | } |
101 | } |
96 | 102 | ||
- | 103 | /* Verify debugging state */ |
|
97 | if ((t->udebug.debug_active != true) || (!t->udebug.stop != having_go)) { |
104 | if (t->udebug.debug_active != true) { |
98 | /* Not in debugging session or undesired GO state */ |
105 | /* Not in debugging session or undesired GO state */ |
- | 106 | spinlock_unlock(&t->lock); |
|
99 | rc = EINVAL; |
107 | interrupts_restore(ipl); |
- | 108 | mutex_unlock(&TASK->udebug.lock); |
|
100 | goto error_exit; |
109 | return ENOENT; |
101 | } |
110 | } |
102 | 111 | ||
- | 112 | /* |
|
103 | spinlock_unlock(&threads_lock); |
113 | * Since the thread has debug_active == true, TASK->udebug.lock |
- | 114 | * is enough to ensure its existence and that debug_active remains |
|
- | 115 | * true. |
|
- | 116 | */ |
|
104 | spinlock_unlock(&t->lock); |
117 | spinlock_unlock(&t->lock); |
- | 118 | interrupts_restore(ipl); |
|
105 | 119 | ||
106 | /* Only t->udebug.lock left */ |
120 | /* Only mutex TASK->udebug.lock left */ |
- | 121 | ||
- | 122 | /* Now verify that the thread belongs to the current task */ |
|
- | 123 | if (t->task != TASK) { |
|
- | 124 | /* No such thread belonging this task*/ |
|
- | 125 | mutex_unlock(&TASK->udebug.lock); |
|
- | 126 | return ENOENT; |
|
- | 127 | } |
|
107 | 128 | ||
- | 129 | /* |
|
- | 130 | * Now we need to grab the thread's debug lock for synchronization |
|
- | 131 | * of the threads stoppability/stop state. |
|
- | 132 | */ |
|
108 | return EOK; /* All went well */ |
133 | mutex_lock(&t->udebug.lock); |
109 | 134 | ||
- | 135 | /* The big task mutex is no longer needed */ |
|
- | 136 | mutex_unlock(&TASK->udebug.lock); |
|
110 | 137 | ||
111 | /* Executed when a check on the thread fails */ |
138 | if (!t->udebug.stop != having_go) { |
112 | error_exit: |
- | |
113 | spinlock_unlock(&t->lock); |
139 | /* Not in debugging session or undesired GO state */ |
114 | spinlock_unlock(&t->udebug.lock); |
140 | mutex_unlock(&t->udebug.lock); |
115 | spinlock_unlock(&threads_lock); |
141 | return EINVAL; |
- | 142 | } |
|
116 | 143 | ||
117 | /* No locks left here */ |
144 | /* Only t->udebug.lock left */ |
- | 145 | ||
118 | return rc; /* Some errors occured */ |
146 | return EOK; /* All went well */ |
119 | } |
147 | } |
120 | 148 | ||
121 | 149 | ||
122 | static void _thread_op_end(thread_t *t) |
150 | static void _thread_op_end(thread_t *t) |
123 | { |
151 | { |
124 | spinlock_unlock(&t->udebug.lock); |
152 | mutex_unlock(&t->udebug.lock); |
125 | } |
153 | } |
126 | 154 | ||
127 | /** |
155 | /** |
128 | * \return 0 (ok, but not done yet), 1 (done) or negative error code. |
156 | * \return 0 (ok, but not done yet), 1 (done) or negative error code. |
129 | */ |
157 | */ |
130 | int udebug_begin(call_t *call) |
158 | int udebug_begin(call_t *call) |
131 | { |
159 | { |
132 | ipl_t ipl; |
- | |
133 | int reply; |
160 | int reply; |
134 | 161 | ||
135 | thread_t *t; |
162 | thread_t *t; |
136 | link_t *cur; |
163 | link_t *cur; |
137 | 164 | ||
138 | klog_printf("udebug_begin()"); |
165 | klog_printf("udebug_begin()"); |
139 | 166 | ||
140 | mutex_lock(&TASK->udebug.lock); |
167 | mutex_lock(&TASK->udebug.lock); |
141 | klog_printf("debugging task %llu", TASK->taskid); |
168 | klog_printf("debugging task %llu", TASK->taskid); |
142 | 169 | ||
143 | if (TASK->udebug.dt_state != UDEBUG_TS_INACTIVE) { |
170 | if (TASK->udebug.dt_state != UDEBUG_TS_INACTIVE) { |
144 | mutex_unlock(&TASK->udebug.lock); |
171 | mutex_unlock(&TASK->udebug.lock); |
145 | klog_printf("udebug_begin(): busy error"); |
172 | klog_printf("udebug_begin(): busy error"); |
146 | 173 | ||
147 | return EBUSY; |
174 | return EBUSY; |
148 | } |
175 | } |
149 | 176 | ||
150 | TASK->udebug.dt_state = UDEBUG_TS_BEGINNING; |
177 | TASK->udebug.dt_state = UDEBUG_TS_BEGINNING; |
151 | TASK->udebug.begin_call = call; |
178 | TASK->udebug.begin_call = call; |
152 | TASK->udebug.debugger = call->sender; |
179 | TASK->udebug.debugger = call->sender; |
153 | 180 | ||
154 | if (TASK->udebug.not_stoppable_count == 0) { |
181 | if (TASK->udebug.not_stoppable_count == 0) { |
155 | TASK->udebug.dt_state = UDEBUG_TS_ACTIVE; |
182 | TASK->udebug.dt_state = UDEBUG_TS_ACTIVE; |
156 | TASK->udebug.begin_call = NULL; |
183 | TASK->udebug.begin_call = NULL; |
157 | reply = 1; /* immediate reply */ |
184 | reply = 1; /* immediate reply */ |
158 | } else { |
185 | } else { |
159 | reply = 0; /* no reply */ |
186 | reply = 0; /* no reply */ |
160 | } |
187 | } |
161 | 188 | ||
162 | /* Set udebug.debug_active on all of the task's userspace threads */ |
189 | /* Set udebug.debug_active on all of the task's userspace threads */ |
163 | 190 | ||
164 | for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) { |
191 | for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) { |
165 | t = list_get_instance(cur, thread_t, th_link); |
192 | t = list_get_instance(cur, thread_t, th_link); |
166 | 193 | ||
167 | ipl = interrupts_disable(); |
- | |
168 | spinlock_lock(&t->udebug.lock); |
194 | mutex_lock(&t->udebug.lock); |
169 | if ((t->flags & THREAD_FLAG_USPACE) != 0) |
195 | if ((t->flags & THREAD_FLAG_USPACE) != 0) |
170 | t->udebug.debug_active = true; |
196 | t->udebug.debug_active = true; |
171 | spinlock_unlock(&t->udebug.lock); |
197 | mutex_unlock(&t->udebug.lock); |
172 | interrupts_restore(ipl); |
- | |
173 | } |
198 | } |
174 | 199 | ||
175 | mutex_unlock(&TASK->udebug.lock); |
200 | mutex_unlock(&TASK->udebug.lock); |
176 | 201 | ||
177 | klog_printf("udebug_begin() done (%s)", |
202 | klog_printf("udebug_begin() done (%s)", |
178 | reply ? "reply" : "stoppability wait"); |
203 | reply ? "reply" : "stoppability wait"); |
179 | 204 | ||
180 | return reply; |
205 | return reply; |
181 | } |
206 | } |
182 | 207 | ||
183 | int udebug_end(void) |
208 | int udebug_end(void) |
184 | { |
209 | { |
185 | int rc; |
210 | int rc; |
186 | 211 | ||
187 | klog_printf("udebug_end()"); |
212 | klog_printf("udebug_end()"); |
188 | 213 | ||
189 | mutex_lock(&TASK->udebug.lock); |
214 | mutex_lock(&TASK->udebug.lock); |
190 | klog_printf("task %llu", TASK->taskid); |
215 | klog_printf("task %llu", TASK->taskid); |
191 | 216 | ||
192 | rc = udebug_task_cleanup(TASK); |
217 | rc = udebug_task_cleanup(TASK); |
193 | 218 | ||
194 | mutex_unlock(&TASK->udebug.lock); |
219 | mutex_unlock(&TASK->udebug.lock); |
195 | 220 | ||
196 | return rc; |
221 | return rc; |
197 | } |
222 | } |
198 | 223 | ||
199 | int udebug_set_evmask(udebug_evmask_t mask) |
224 | int udebug_set_evmask(udebug_evmask_t mask) |
200 | { |
225 | { |
201 | klog_printf("udebug_set_mask()"); |
226 | klog_printf("udebug_set_mask()"); |
202 | 227 | ||
203 | klog_printf("debugging task %llu", TASK->taskid); |
228 | klog_printf("debugging task %llu", TASK->taskid); |
204 | 229 | ||
205 | mutex_lock(&TASK->udebug.lock); |
230 | mutex_lock(&TASK->udebug.lock); |
206 | 231 | ||
207 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
232 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
208 | mutex_unlock(&TASK->udebug.lock); |
233 | mutex_unlock(&TASK->udebug.lock); |
209 | klog_printf("udebug_set_mask(): not active debuging session"); |
234 | klog_printf("udebug_set_mask(): not active debuging session"); |
210 | 235 | ||
211 | return EINVAL; |
236 | return EINVAL; |
212 | } |
237 | } |
213 | 238 | ||
214 | TASK->udebug.evmask = mask; |
239 | TASK->udebug.evmask = mask; |
215 | 240 | ||
216 | mutex_unlock(&TASK->udebug.lock); |
241 | mutex_unlock(&TASK->udebug.lock); |
217 | 242 | ||
218 | return 0; |
243 | return 0; |
219 | } |
244 | } |
220 | 245 | ||
221 | 246 | ||
222 | int udebug_go(thread_t *t, call_t *call) |
247 | int udebug_go(thread_t *t, call_t *call) |
223 | { |
248 | { |
224 | ipl_t ipl; |
- | |
225 | int rc; |
249 | int rc; |
226 | 250 | ||
227 | // klog_printf("udebug_go()"); |
251 | // klog_printf("udebug_go()"); |
228 | 252 | ||
229 | ipl = interrupts_disable(); |
- | |
230 | - | ||
231 | /* On success, this will lock t->udebug.lock */ |
253 | /* On success, this will lock t->udebug.lock */ |
232 | rc = _thread_op_begin(t, false); |
254 | rc = _thread_op_begin(t, false); |
233 | if (rc != EOK) { |
255 | if (rc != EOK) { |
234 | interrupts_restore(ipl); |
- | |
235 | return rc; |
256 | return rc; |
236 | } |
257 | } |
237 | 258 | ||
238 | t->udebug.go_call = call; |
259 | t->udebug.go_call = call; |
239 | t->udebug.stop = false; |
260 | t->udebug.stop = false; |
240 | t->udebug.cur_event = 0; /* none */ |
261 | t->udebug.cur_event = 0; /* none */ |
241 | 262 | ||
242 | /* |
263 | /* |
243 | * Neither t's lock nor threads_lock may be held during wakeup |
264 | * Neither t's lock nor threads_lock may be held during wakeup |
244 | */ |
265 | */ |
245 | waitq_wakeup(&t->udebug.go_wq, WAKEUP_FIRST); |
266 | waitq_wakeup(&t->udebug.go_wq, WAKEUP_FIRST); |
246 | 267 | ||
247 | _thread_op_end(t); |
268 | _thread_op_end(t); |
248 | interrupts_restore(ipl); |
- | |
249 | 269 | ||
250 | return 0; |
270 | return 0; |
251 | } |
271 | } |
252 | 272 | ||
253 | int udebug_stop(thread_t *t, call_t *call) |
273 | int udebug_stop(thread_t *t, call_t *call) |
254 | { |
274 | { |
255 | ipl_t ipl; |
- | |
256 | int rc; |
275 | int rc; |
257 | 276 | ||
258 | klog_printf("udebug_stop()"); |
277 | klog_printf("udebug_stop()"); |
259 | mutex_lock(&TASK->udebug.lock); |
278 | mutex_lock(&TASK->udebug.lock); |
260 | 279 | ||
261 | ipl = interrupts_disable(); |
- | |
262 | - | ||
263 | /* |
280 | /* |
264 | * On success, this will lock t->udebug.lock. Note that this makes sure |
281 | * On success, this will lock t->udebug.lock. Note that this makes sure |
265 | * the thread is not stopped. |
282 | * the thread is not stopped. |
266 | */ |
283 | */ |
267 | rc = _thread_op_begin(t, true); |
284 | rc = _thread_op_begin(t, true); |
268 | if (rc != EOK) { |
285 | if (rc != EOK) { |
269 | interrupts_restore(ipl); |
- | |
270 | return rc; |
286 | return rc; |
271 | } |
287 | } |
272 | 288 | ||
273 | /* Take GO away from the thread */ |
289 | /* Take GO away from the thread */ |
274 | t->udebug.stop = true; |
290 | t->udebug.stop = true; |
275 | 291 | ||
276 | if (!t->udebug.stoppable) { |
292 | if (!t->udebug.stoppable) { |
277 | /* Answer will be sent when the thread becomes stoppable */ |
293 | /* Answer will be sent when the thread becomes stoppable */ |
278 | _thread_op_end(t); |
294 | _thread_op_end(t); |
279 | interrupts_restore(ipl); |
- | |
280 | return 0; |
295 | return 0; |
281 | } |
296 | } |
282 | 297 | ||
283 | /* |
298 | /* |
284 | * Answer GO call |
299 | * Answer GO call |
285 | */ |
300 | */ |
286 | klog_printf("udebug_stop - answering go call"); |
301 | klog_printf("udebug_stop - answering go call"); |
287 | 302 | ||
288 | /* Make sure nobody takes this call away from us */ |
303 | /* Make sure nobody takes this call away from us */ |
289 | call = t->udebug.go_call; |
304 | call = t->udebug.go_call; |
290 | t->udebug.go_call = NULL; |
305 | t->udebug.go_call = NULL; |
291 | 306 | ||
292 | IPC_SET_RETVAL(call->data, 0); |
307 | IPC_SET_RETVAL(call->data, 0); |
293 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_STOP); |
308 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_STOP); |
294 | klog_printf("udebug_stop/ipc_answer"); |
309 | klog_printf("udebug_stop/ipc_answer"); |
295 | 310 | ||
296 | THREAD->udebug.cur_event = UDEBUG_EVENT_STOP; |
311 | THREAD->udebug.cur_event = UDEBUG_EVENT_STOP; |
297 | 312 | ||
298 | _thread_op_end(t); |
313 | _thread_op_end(t); |
299 | interrupts_restore(ipl); |
- | |
300 | 314 | ||
301 | ipc_answer(&TASK->answerbox, call); |
315 | ipc_answer(&TASK->answerbox, call); |
302 | mutex_unlock(&TASK->udebug.lock); |
316 | mutex_unlock(&TASK->udebug.lock); |
303 | 317 | ||
304 | klog_printf("udebog_stop/done"); |
318 | klog_printf("udebog_stop/done"); |
305 | return 0; |
319 | return 0; |
306 | } |
320 | } |
307 | 321 | ||
308 | int udebug_thread_read(void **buffer, size_t buf_size, size_t *n) |
322 | int udebug_thread_read(void **buffer, size_t buf_size, size_t *n) |
309 | { |
323 | { |
310 | thread_t *t; |
324 | thread_t *t; |
311 | link_t *cur; |
325 | link_t *cur; |
312 | unative_t tid; |
326 | unative_t tid; |
313 | unsigned copied_ids; |
327 | unsigned copied_ids; |
314 | ipl_t ipl; |
328 | ipl_t ipl; |
315 | unative_t *id_buffer; |
329 | unative_t *id_buffer; |
316 | int flags; |
330 | int flags; |
317 | size_t max_ids; |
331 | size_t max_ids; |
318 | 332 | ||
319 | klog_printf("udebug_thread_read()"); |
333 | klog_printf("udebug_thread_read()"); |
320 | 334 | ||
321 | /* Allocate a buffer to hold thread IDs */ |
335 | /* Allocate a buffer to hold thread IDs */ |
322 | id_buffer = malloc(buf_size, 0); |
336 | id_buffer = malloc(buf_size, 0); |
323 | 337 | ||
324 | mutex_lock(&TASK->udebug.lock); |
338 | mutex_lock(&TASK->udebug.lock); |
325 | 339 | ||
326 | /* Verify task state */ |
340 | /* Verify task state */ |
327 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
341 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
328 | mutex_unlock(&TASK->udebug.lock); |
342 | mutex_unlock(&TASK->udebug.lock); |
329 | return EINVAL; |
343 | return EINVAL; |
330 | } |
344 | } |
331 | 345 | ||
332 | ipl = interrupts_disable(); |
346 | ipl = interrupts_disable(); |
333 | spinlock_lock(&TASK->lock); |
347 | spinlock_lock(&TASK->lock); |
334 | /* Copy down the thread IDs */ |
348 | /* Copy down the thread IDs */ |
335 | 349 | ||
336 | max_ids = buf_size / sizeof(unative_t); |
350 | max_ids = buf_size / sizeof(unative_t); |
337 | copied_ids = 0; |
351 | copied_ids = 0; |
338 | 352 | ||
- | 353 | /* FIXME: make sure the thread isn't past debug shutdown... */ |
|
339 | for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) { |
354 | for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) { |
340 | /* Do not write past end of buffer */ |
355 | /* Do not write past end of buffer */ |
341 | if (copied_ids >= max_ids) break; |
356 | if (copied_ids >= max_ids) break; |
342 | 357 | ||
343 | t = list_get_instance(cur, thread_t, th_link); |
358 | t = list_get_instance(cur, thread_t, th_link); |
344 | 359 | ||
345 | spinlock_lock(&t->lock); |
360 | spinlock_lock(&t->lock); |
346 | flags = t->flags; |
361 | flags = t->flags; |
347 | spinlock_unlock(&t->lock); |
362 | spinlock_unlock(&t->lock); |
348 | 363 | ||
349 | /* Not interested in kernel threads */ |
364 | /* Not interested in kernel threads */ |
350 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
365 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
351 | /* Using thread struct pointer as identification hash */ |
366 | /* Using thread struct pointer as identification hash */ |
352 | tid = (unative_t) t; |
367 | tid = (unative_t) t; |
353 | id_buffer[copied_ids++] = tid; |
368 | id_buffer[copied_ids++] = tid; |
354 | } |
369 | } |
355 | } |
370 | } |
356 | 371 | ||
357 | spinlock_unlock(&TASK->lock); |
372 | spinlock_unlock(&TASK->lock); |
358 | interrupts_restore(ipl); |
373 | interrupts_restore(ipl); |
359 | 374 | ||
360 | mutex_unlock(&TASK->udebug.lock); |
375 | mutex_unlock(&TASK->udebug.lock); |
361 | 376 | ||
362 | *buffer = id_buffer; |
377 | *buffer = id_buffer; |
363 | *n = copied_ids * sizeof(unative_t); |
378 | *n = copied_ids * sizeof(unative_t); |
364 | 379 | ||
365 | return 0; |
380 | return 0; |
366 | } |
381 | } |
367 | 382 | ||
368 | int udebug_args_read(thread_t *t, void **buffer) |
383 | int udebug_args_read(thread_t *t, void **buffer) |
369 | { |
384 | { |
370 | int rc; |
385 | int rc; |
371 | ipl_t ipl; |
- | |
372 | unative_t *arg_buffer; |
386 | unative_t *arg_buffer; |
373 | 387 | ||
374 | klog_printf("udebug_args_read()"); |
388 | // klog_printf("udebug_args_read()"); |
375 | 389 | ||
376 | /* Prepare a buffer to hold the arguments */ |
390 | /* Prepare a buffer to hold the arguments */ |
377 | arg_buffer = malloc(6 * sizeof(unative_t), 0); |
391 | arg_buffer = malloc(6 * sizeof(unative_t), 0); |
378 | 392 | ||
379 | ipl = interrupts_disable(); |
- | |
380 | - | ||
381 | /* On success, this will lock t->udebug.lock */ |
393 | /* On success, this will lock t->udebug.lock */ |
382 | rc = _thread_op_begin(t, false); |
394 | rc = _thread_op_begin(t, false); |
383 | if (rc != EOK) { |
395 | if (rc != EOK) { |
384 | interrupts_restore(ipl); |
- | |
385 | return rc; |
396 | return rc; |
386 | } |
397 | } |
387 | 398 | ||
388 | /* Additionally we need to verify that we are inside a syscall */ |
399 | /* Additionally we need to verify that we are inside a syscall */ |
389 | if (t->udebug.cur_event != UDEBUG_EVENT_SYSCALL_B && |
400 | if (t->udebug.cur_event != UDEBUG_EVENT_SYSCALL_B && |
390 | t->udebug.cur_event != UDEBUG_EVENT_SYSCALL_E) { |
401 | t->udebug.cur_event != UDEBUG_EVENT_SYSCALL_E) { |
391 | _thread_op_end(t); |
402 | _thread_op_end(t); |
392 | interrupts_restore(ipl); |
- | |
393 | - | ||
394 | return EINVAL; |
403 | return EINVAL; |
395 | } |
404 | } |
396 | 405 | ||
397 | /* Copy to a local buffer before releasing the lock */ |
406 | /* Copy to a local buffer before releasing the lock */ |
398 | memcpy(arg_buffer, t->udebug.syscall_args, 6 * sizeof(unative_t)); |
407 | memcpy(arg_buffer, t->udebug.syscall_args, 6 * sizeof(unative_t)); |
399 | 408 | ||
400 | _thread_op_end(t); |
409 | _thread_op_end(t); |
401 | interrupts_restore(ipl); |
- | |
402 | 410 | ||
403 | *buffer = arg_buffer; |
411 | *buffer = arg_buffer; |
404 | return 0; |
412 | return 0; |
405 | } |
413 | } |
406 | 414 | ||
407 | int udebug_regs_read(thread_t *t, void *buffer) |
415 | int udebug_regs_read(thread_t *t, void *buffer) |
408 | { |
416 | { |
409 | istate_t *state; |
417 | istate_t *state; |
410 | int rc; |
418 | int rc; |
411 | ipl_t ipl; |
- | |
412 | 419 | ||
413 | klog_printf("udebug_regs_read()"); |
420 | // klog_printf("udebug_regs_read()"); |
414 | - | ||
415 | ipl = interrupts_disable(); |
- | |
416 | 421 | ||
417 | /* On success, this will lock t->udebug.lock */ |
422 | /* On success, this will lock t->udebug.lock */ |
418 | rc = _thread_op_begin(t, false); |
423 | rc = _thread_op_begin(t, false); |
419 | if (rc != EOK) { |
424 | if (rc != EOK) { |
420 | interrupts_restore(ipl); |
- | |
421 | return rc; |
425 | return rc; |
422 | } |
426 | } |
423 | 427 | ||
424 | state = t->udebug.uspace_state; |
428 | state = t->udebug.uspace_state; |
425 | if (state == NULL) { |
429 | if (state == NULL) { |
426 | _thread_op_end(t); |
430 | _thread_op_end(t); |
427 | interrupts_restore(ipl); |
- | |
428 | klog_printf("udebug_regs_read() - istate not available"); |
431 | klog_printf("udebug_regs_read() - istate not available"); |
429 | return EBUSY; |
432 | return EBUSY; |
430 | } |
433 | } |
431 | 434 | ||
432 | /* Copy to the allocated buffer */ |
435 | /* Copy to the allocated buffer */ |
433 | memcpy(buffer, state, sizeof(istate_t)); |
436 | memcpy(buffer, state, sizeof(istate_t)); |
434 | 437 | ||
435 | _thread_op_end(t); |
438 | _thread_op_end(t); |
436 | interrupts_restore(ipl); |
- | |
437 | 439 | ||
438 | return 0; |
440 | return 0; |
439 | } |
441 | } |
440 | 442 | ||
441 | int udebug_regs_write(thread_t *t, void *buffer) |
443 | int udebug_regs_write(thread_t *t, void *buffer) |
442 | { |
444 | { |
443 | int rc; |
445 | int rc; |
444 | istate_t *state; |
446 | istate_t *state; |
445 | ipl_t ipl; |
- | |
446 | 447 | ||
447 | klog_printf("udebug_regs_write()"); |
448 | klog_printf("udebug_regs_write()"); |
448 | 449 | ||
449 | /* Try to change the thread's uspace_state */ |
450 | /* Try to change the thread's uspace_state */ |
450 | 451 | ||
451 | ipl = interrupts_disable(); |
- | |
452 | - | ||
453 | /* On success, this will lock t->udebug.lock */ |
452 | /* On success, this will lock t->udebug.lock */ |
454 | rc = _thread_op_begin(t, false); |
453 | rc = _thread_op_begin(t, false); |
455 | if (rc != EOK) { |
454 | if (rc != EOK) { |
456 | klog_printf("error locking thread"); |
455 | klog_printf("error locking thread"); |
457 | interrupts_restore(ipl); |
- | |
458 | return rc; |
456 | return rc; |
459 | } |
457 | } |
460 | 458 | ||
461 | state = t->udebug.uspace_state; |
459 | state = t->udebug.uspace_state; |
462 | if (state == NULL) { |
460 | if (state == NULL) { |
463 | _thread_op_end(t); |
461 | _thread_op_end(t); |
464 | interrupts_restore(ipl); |
- | |
465 | klog_printf("udebug_regs_write() - istate not available"); |
462 | klog_printf("udebug_regs_write() - istate not available"); |
466 | - | ||
467 | return EBUSY; |
463 | return EBUSY; |
468 | } |
464 | } |
469 | 465 | ||
470 | memcpy(t->udebug.uspace_state, buffer, sizeof(istate_t)); |
466 | memcpy(t->udebug.uspace_state, buffer, sizeof(istate_t)); |
471 | 467 | ||
472 | _thread_op_end(t); |
468 | _thread_op_end(t); |
473 | interrupts_restore(ipl); |
- | |
474 | 469 | ||
475 | return 0; |
470 | return 0; |
476 | } |
471 | } |
477 | 472 | ||
478 | 473 | ||
479 | int udebug_mem_read(unative_t uspace_addr, size_t n, void **buffer) |
474 | int udebug_mem_read(unative_t uspace_addr, size_t n, void **buffer) |
480 | { |
475 | { |
481 | void *data_buffer; |
476 | void *data_buffer; |
482 | int rc; |
477 | int rc; |
483 | 478 | ||
484 | /* Verify task state */ |
479 | /* Verify task state */ |
485 | mutex_lock(&TASK->udebug.lock); |
480 | mutex_lock(&TASK->udebug.lock); |
486 | 481 | ||
487 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
482 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
488 | mutex_unlock(&TASK->udebug.lock); |
483 | mutex_unlock(&TASK->udebug.lock); |
489 | return EBUSY; |
484 | return EBUSY; |
490 | } |
485 | } |
491 | 486 | ||
492 | data_buffer = malloc(n, 0); |
487 | data_buffer = malloc(n, 0); |
493 | 488 | ||
494 | // klog_printf("udebug_mem_read: src=%u, size=%u", uspace_addr, n); |
489 | // klog_printf("udebug_mem_read: src=%u, size=%u", uspace_addr, n); |
495 | 490 | ||
496 | /* NOTE: this is not strictly from a syscall... but that shouldn't |
491 | /* NOTE: this is not strictly from a syscall... but that shouldn't |
497 | * be a problem */ |
492 | * be a problem */ |
498 | rc = copy_from_uspace(data_buffer, (void *)uspace_addr, n); |
493 | rc = copy_from_uspace(data_buffer, (void *)uspace_addr, n); |
499 | mutex_unlock(&TASK->udebug.lock); |
494 | mutex_unlock(&TASK->udebug.lock); |
500 | 495 | ||
501 | if (rc != 0) return rc; |
496 | if (rc != 0) return rc; |
502 | 497 | ||
503 | *buffer = data_buffer; |
498 | *buffer = data_buffer; |
504 | return 0; |
499 | return 0; |
505 | } |
500 | } |
506 | 501 | ||
507 | int udebug_mem_write(unative_t uspace_addr, void *data, size_t n) |
502 | int udebug_mem_write(unative_t uspace_addr, void *data, size_t n) |
508 | { |
503 | { |
509 | int rc; |
504 | int rc; |
510 | 505 | ||
511 | klog_printf("udebug_mem_write()"); |
506 | klog_printf("udebug_mem_write()"); |
512 | 507 | ||
513 | /* Verify task state */ |
508 | /* Verify task state */ |
514 | mutex_lock(&TASK->udebug.lock); |
509 | mutex_lock(&TASK->udebug.lock); |
515 | 510 | ||
516 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
511 | if (TASK->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
517 | mutex_unlock(&TASK->udebug.lock); |
512 | mutex_unlock(&TASK->udebug.lock); |
518 | return EBUSY; |
513 | return EBUSY; |
519 | } |
514 | } |
520 | 515 | ||
521 | klog_printf("dst=%u, size=%u", uspace_addr, n); |
516 | klog_printf("dst=%u, size=%u", uspace_addr, n); |
522 | 517 | ||
523 | /* NOTE: this is not strictly from a syscall... but that shouldn't |
518 | /* NOTE: this is not strictly from a syscall... but that shouldn't |
524 | * be a problem */ |
519 | * be a problem */ |
525 | // rc = copy_to_uspace((void *)uspace_addr, data, n); |
520 | // rc = copy_to_uspace((void *)uspace_addr, data, n); |
526 | // if (rc) return rc; |
521 | // if (rc) return rc; |
527 | 522 | ||
528 | rc = as_debug_write(uspace_addr, data, n); |
523 | rc = as_debug_write(uspace_addr, data, n); |
529 | 524 | ||
530 | mutex_unlock(&TASK->udebug.lock); |
525 | mutex_unlock(&TASK->udebug.lock); |
531 | 526 | ||
532 | return rc; |
527 | return rc; |
533 | } |
528 | } |
534 | 529 | ||
535 | /** @} |
530 | /** @} |
536 | */ |
531 | */ |
537 | 532 |