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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. |
35 | * @brief Udebug. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <synch/waitq.h> |
38 | #include <synch/waitq.h> |
39 | #include <console/klog.h> |
39 | #include <console/klog.h> |
40 | #include <udebug/udebug.h> |
40 | #include <udebug/udebug.h> |
41 | #include <errno.h> |
41 | #include <errno.h> |
42 | #include <arch.h> |
42 | #include <arch.h> |
43 | 43 | ||
- | 44 | void udebug_task_init(udebug_task_t *ut) |
|
- | 45 | { |
|
- | 46 | ut->dt_state = UDEBUG_TS_INACTIVE; |
|
- | 47 | ut->begin_call = NULL; |
|
- | 48 | ut->not_stoppable_count = 0; |
|
- | 49 | ut->evmask = 0; |
|
- | 50 | } |
|
- | 51 | ||
44 | static void udebug_wait_for_go(waitq_t *wq) |
52 | static void udebug_wait_for_go(waitq_t *wq) |
45 | { |
53 | { |
46 | int rc; |
54 | int rc; |
47 | ipl_t ipl; |
55 | ipl_t ipl; |
48 | 56 | ||
49 | ipl = waitq_sleep_prepare(wq); |
57 | ipl = waitq_sleep_prepare(wq); |
50 | 58 | ||
51 | wq->missed_wakeups = 0; /* Enforce blocking. */ |
59 | wq->missed_wakeups = 0; /* Enforce blocking. */ |
52 | rc = waitq_sleep_timeout_unsafe(wq, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE); |
60 | rc = waitq_sleep_timeout_unsafe(wq, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE); |
53 | 61 | ||
54 | waitq_sleep_finish(wq, rc, ipl); |
62 | waitq_sleep_finish(wq, rc, ipl); |
55 | } |
63 | } |
56 | 64 | ||
57 | void udebug_stoppable_begin(void) |
65 | void udebug_stoppable_begin(void) |
58 | { |
66 | { |
59 | int nsc; |
67 | int nsc; |
60 | call_t *db_call, *go_call; |
68 | call_t *db_call, *go_call; |
61 | ipl_t ipl; |
69 | ipl_t ipl; |
62 | 70 | ||
63 | ASSERT(THREAD); |
71 | ASSERT(THREAD); |
64 | ASSERT(TASK); |
72 | ASSERT(TASK); |
65 | 73 | ||
66 | ipl = interrupts_disable(); |
74 | ipl = interrupts_disable(); |
67 | spinlock_lock(&TASK->lock); |
75 | spinlock_lock(&TASK->lock); |
68 | 76 | ||
69 | nsc = --TASK->not_stoppable_count; |
77 | nsc = --TASK->udebug.not_stoppable_count; |
70 | 78 | ||
71 | if (TASK->dt_state == UDEBUG_TS_BEGINNING) { |
79 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING) { |
72 | klog_printf("udebug_stoppable_begin"); |
80 | klog_printf("udebug_stoppable_begin"); |
73 | klog_printf(" - nsc := %d", nsc); |
81 | klog_printf(" - nsc := %d", nsc); |
74 | } |
82 | } |
75 | 83 | ||
76 | if (TASK->dt_state == UDEBUG_TS_BEGINNING && nsc == 0) { |
84 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING && nsc == 0) { |
77 | /* |
85 | /* |
78 | * This was the last non-stoppable thread. Reply to |
86 | * This was the last non-stoppable thread. Reply to |
79 | * DEBUG_BEGIN call. |
87 | * DEBUG_BEGIN call. |
80 | */ |
88 | */ |
81 | 89 | ||
82 | db_call = TASK->debug_begin_call; |
90 | db_call = TASK->udebug.begin_call; |
83 | ASSERT(db_call); |
91 | ASSERT(db_call); |
84 | 92 | ||
85 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
93 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
86 | spinlock_lock(&THREAD->debug_lock); |
94 | spinlock_lock(&THREAD->debug_lock); |
87 | THREAD->debug_stoppable = true; |
95 | THREAD->debug_stoppable = true; |
88 | spinlock_unlock(&THREAD->debug_lock); |
96 | spinlock_unlock(&THREAD->debug_lock); |
89 | 97 | ||
90 | TASK->dt_state = UDEBUG_TS_ACTIVE; |
98 | TASK->udebug.dt_state = UDEBUG_TS_ACTIVE; |
91 | TASK->debug_begin_call = NULL; |
99 | TASK->udebug.begin_call = NULL; |
92 | spinlock_unlock(&TASK->lock); |
100 | spinlock_unlock(&TASK->lock); |
93 | interrupts_restore(ipl); |
101 | interrupts_restore(ipl); |
94 | 102 | ||
95 | IPC_SET_RETVAL(db_call->data, 0); |
103 | IPC_SET_RETVAL(db_call->data, 0); |
96 | //klog_printf("udebug_stoppable_begin/ipc_answer"); |
104 | //klog_printf("udebug_stoppable_begin/ipc_answer"); |
97 | ipc_answer(&TASK->answerbox, db_call); |
105 | ipc_answer(&TASK->answerbox, db_call); |
98 | 106 | ||
99 | } else if (TASK->dt_state == UDEBUG_TS_ACTIVE) { |
107 | } else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
100 | /* |
108 | /* |
101 | * Active debugging session |
109 | * Active debugging session |
102 | */ |
110 | */ |
103 | 111 | ||
104 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
112 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
105 | spinlock_lock(&THREAD->debug_lock); |
113 | spinlock_lock(&THREAD->debug_lock); |
106 | THREAD->debug_stoppable = true; |
114 | THREAD->debug_stoppable = true; |
107 | 115 | ||
108 | if (THREAD->debug_active && THREAD->debug_stop) { |
116 | if (THREAD->debug_active && THREAD->debug_stop) { |
109 | /* |
117 | /* |
110 | * Thread was requested to stop - answer go call |
118 | * Thread was requested to stop - answer go call |
111 | */ |
119 | */ |
112 | 120 | ||
113 | /* Make sure nobody takes this call away from us */ |
121 | /* Make sure nobody takes this call away from us */ |
114 | go_call = THREAD->debug_go_call; |
122 | go_call = THREAD->debug_go_call; |
115 | THREAD->debug_go_call = NULL; |
123 | THREAD->debug_go_call = NULL; |
116 | ASSERT(go_call); |
124 | ASSERT(go_call); |
117 | 125 | ||
118 | IPC_SET_RETVAL(go_call->data, 0); |
126 | IPC_SET_RETVAL(go_call->data, 0); |
119 | IPC_SET_ARG1(go_call->data, UDEBUG_EVENT_STOP); |
127 | IPC_SET_ARG1(go_call->data, UDEBUG_EVENT_STOP); |
120 | 128 | ||
121 | THREAD->cur_event = UDEBUG_EVENT_STOP; |
129 | THREAD->cur_event = UDEBUG_EVENT_STOP; |
122 | spinlock_unlock(&THREAD->debug_lock); |
130 | spinlock_unlock(&THREAD->debug_lock); |
123 | 131 | ||
124 | ipc_answer(&TASK->answerbox, go_call); |
132 | ipc_answer(&TASK->answerbox, go_call); |
125 | 133 | ||
126 | spinlock_unlock(&TASK->lock); |
134 | spinlock_unlock(&TASK->lock); |
127 | interrupts_restore(ipl); |
135 | interrupts_restore(ipl); |
128 | } else { |
136 | } else { |
129 | /* |
137 | /* |
130 | * No stop request - nothing happens. |
138 | * No stop request - nothing happens. |
131 | */ |
139 | */ |
132 | spinlock_unlock(&THREAD->debug_lock); |
140 | spinlock_unlock(&THREAD->debug_lock); |
133 | spinlock_unlock(&TASK->lock); |
141 | spinlock_unlock(&TASK->lock); |
134 | interrupts_restore(ipl); |
142 | interrupts_restore(ipl); |
135 | } |
143 | } |
136 | } else { |
144 | } else { |
137 | /* |
145 | /* |
138 | * All other cases - nothing special happens. |
146 | * All other cases - nothing special happens. |
139 | */ |
147 | */ |
140 | 148 | ||
141 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
149 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
142 | spinlock_lock(&THREAD->debug_lock); |
150 | spinlock_lock(&THREAD->debug_lock); |
143 | THREAD->debug_stoppable = true; |
151 | THREAD->debug_stoppable = true; |
144 | spinlock_unlock(&THREAD->debug_lock); |
152 | spinlock_unlock(&THREAD->debug_lock); |
145 | 153 | ||
146 | spinlock_unlock(&TASK->lock); |
154 | spinlock_unlock(&TASK->lock); |
147 | interrupts_restore(ipl); |
155 | interrupts_restore(ipl); |
148 | } |
156 | } |
149 | } |
157 | } |
150 | 158 | ||
151 | void udebug_stoppable_end(void) |
159 | void udebug_stoppable_end(void) |
152 | { |
160 | { |
153 | ipl_t ipl; |
161 | ipl_t ipl; |
154 | 162 | ||
155 | restart: |
163 | restart: |
156 | ipl = interrupts_disable(); |
164 | ipl = interrupts_disable(); |
157 | spinlock_lock(&TASK->lock); |
165 | spinlock_lock(&TASK->lock); |
158 | 166 | ||
159 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
167 | /* Lock order OK, THREAD->debug_lock is after TASK->lock */ |
160 | spinlock_lock(&THREAD->debug_lock); |
168 | spinlock_lock(&THREAD->debug_lock); |
161 | 169 | ||
162 | if (TASK->dt_state == UDEBUG_TS_ACTIVE) { |
170 | if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
163 | //klog_printf("udebug_stoppable_end"); |
171 | //klog_printf("udebug_stoppable_end"); |
164 | //klog_printf("debug_stop=%d", THREAD->debug_stop); |
172 | //klog_printf("debug_stop=%d", THREAD->debug_stop); |
165 | } |
173 | } |
166 | 174 | ||
167 | if (THREAD->debug_active && |
175 | if (THREAD->debug_active && |
168 | THREAD->debug_stop == true) { |
176 | THREAD->debug_stop == true) { |
169 | TASK->debug_begin_call = NULL; |
177 | TASK->udebug.begin_call = NULL; |
170 | spinlock_unlock(&THREAD->debug_lock); |
178 | spinlock_unlock(&THREAD->debug_lock); |
171 | spinlock_unlock(&TASK->lock); |
179 | spinlock_unlock(&TASK->lock); |
172 | interrupts_restore(ipl); |
180 | interrupts_restore(ipl); |
173 | 181 | ||
174 | udebug_wait_for_go(&THREAD->go_wq); |
182 | udebug_wait_for_go(&THREAD->go_wq); |
175 | 183 | ||
176 | goto restart; |
184 | goto restart; |
177 | /* must try again - have to lose stoppability atomically */ |
185 | /* must try again - have to lose stoppability atomically */ |
178 | } else { |
186 | } else { |
179 | ++TASK->not_stoppable_count; |
187 | ++TASK->udebug.not_stoppable_count; |
180 | THREAD->debug_stoppable = false; |
188 | THREAD->debug_stoppable = false; |
181 | 189 | ||
182 | spinlock_unlock(&THREAD->debug_lock); |
190 | spinlock_unlock(&THREAD->debug_lock); |
183 | spinlock_unlock(&TASK->lock); |
191 | spinlock_unlock(&TASK->lock); |
184 | interrupts_restore(ipl); |
192 | interrupts_restore(ipl); |
185 | } |
193 | } |
186 | } |
194 | } |
187 | 195 | ||
188 | void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3, |
196 | void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3, |
189 | unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc, |
197 | unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc, |
190 | bool end_variant) |
198 | bool end_variant) |
191 | { |
199 | { |
192 | call_t *call; |
200 | call_t *call; |
193 | ipl_t ipl; |
201 | ipl_t ipl; |
194 | udebug_event_t etype; |
202 | udebug_event_t etype; |
195 | 203 | ||
196 | etype = end_variant ? UDEBUG_EVENT_SYSCALL_E : UDEBUG_EVENT_SYSCALL_B; |
204 | etype = end_variant ? UDEBUG_EVENT_SYSCALL_E : UDEBUG_EVENT_SYSCALL_B; |
197 | 205 | ||
198 | ipl = interrupts_disable(); |
206 | ipl = interrupts_disable(); |
199 | spinlock_lock(&THREAD->debug_lock); |
207 | spinlock_lock(&THREAD->debug_lock); |
200 | 208 | ||
201 | /* Must only generate events when in debugging session and have go */ |
209 | /* Must only generate events when in debugging session and have go */ |
202 | if (THREAD->debug_active != true || |
210 | if (THREAD->debug_active != true || |
203 | THREAD->debug_stop == true || |
211 | THREAD->debug_stop == true || |
204 | (TASK->debug_evmask & UDEBUG_EVMASK(etype)) == 0) { |
212 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
205 | spinlock_unlock(&THREAD->debug_lock); |
213 | spinlock_unlock(&THREAD->debug_lock); |
206 | interrupts_restore(ipl); |
214 | interrupts_restore(ipl); |
207 | return; |
215 | return; |
208 | } |
216 | } |
209 | 217 | ||
210 | //klog_printf("udebug_syscall_event"); |
218 | //klog_printf("udebug_syscall_event"); |
211 | call = THREAD->debug_go_call; |
219 | call = THREAD->debug_go_call; |
212 | IPC_SET_RETVAL(call->data, 0); |
220 | IPC_SET_RETVAL(call->data, 0); |
213 | IPC_SET_ARG1(call->data, etype); |
221 | IPC_SET_ARG1(call->data, etype); |
214 | IPC_SET_ARG2(call->data, id); |
222 | IPC_SET_ARG2(call->data, id); |
215 | IPC_SET_ARG3(call->data, rc); |
223 | IPC_SET_ARG3(call->data, rc); |
216 | //klog_printf("udebug_syscall_event/ipc_answer"); |
224 | //klog_printf("udebug_syscall_event/ipc_answer"); |
217 | 225 | ||
218 | THREAD->syscall_args[0] = a1; |
226 | THREAD->syscall_args[0] = a1; |
219 | THREAD->syscall_args[1] = a2; |
227 | THREAD->syscall_args[1] = a2; |
220 | THREAD->syscall_args[2] = a3; |
228 | THREAD->syscall_args[2] = a3; |
221 | THREAD->syscall_args[3] = a4; |
229 | THREAD->syscall_args[3] = a4; |
222 | THREAD->syscall_args[4] = a5; |
230 | THREAD->syscall_args[4] = a5; |
223 | THREAD->syscall_args[5] = a6; |
231 | THREAD->syscall_args[5] = a6; |
224 | 232 | ||
225 | /* |
233 | /* |
226 | * Make sure debug_stop is true when going to sleep |
234 | * Make sure debug_stop is true when going to sleep |
227 | * in case we get woken up by DEBUG_END. (At which |
235 | * in case we get woken up by DEBUG_END. (At which |
228 | * point it must be back to the initial true value). |
236 | * point it must be back to the initial true value). |
229 | */ |
237 | */ |
230 | THREAD->debug_stop = true; |
238 | THREAD->debug_stop = true; |
231 | 239 | ||
232 | THREAD->cur_event = etype; |
240 | THREAD->cur_event = etype; |
233 | spinlock_unlock(&THREAD->debug_lock); |
241 | spinlock_unlock(&THREAD->debug_lock); |
234 | 242 | ||
235 | spinlock_lock(&TASK->lock); |
243 | spinlock_lock(&TASK->lock); |
236 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
244 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
237 | spinlock_unlock(&TASK->lock); |
245 | spinlock_unlock(&TASK->lock); |
238 | interrupts_restore(ipl); |
246 | interrupts_restore(ipl); |
239 | 247 | ||
240 | udebug_wait_for_go(&THREAD->go_wq); |
248 | udebug_wait_for_go(&THREAD->go_wq); |
241 | } |
249 | } |
242 | 250 | ||
243 | void udebug_thread_b_event(struct thread *t) |
251 | void udebug_thread_b_event(struct thread *t) |
244 | { |
252 | { |
245 | call_t *call; |
253 | call_t *call; |
246 | ipl_t ipl; |
254 | ipl_t ipl; |
247 | 255 | ||
248 | ipl = interrupts_disable(); |
256 | ipl = interrupts_disable(); |
249 | spinlock_lock(&THREAD->debug_lock); |
257 | spinlock_lock(&THREAD->debug_lock); |
250 | 258 | ||
251 | klog_printf("udebug_thread_b_event"); |
259 | klog_printf("udebug_thread_b_event"); |
252 | klog_printf("- check state"); |
260 | klog_printf("- check state"); |
253 | 261 | ||
254 | /* Must only generate events when in debugging session */ |
262 | /* Must only generate events when in debugging session */ |
255 | if (THREAD->debug_active != true) { |
263 | if (THREAD->debug_active != true) { |
256 | klog_printf("- debug_active: %s, debug_stop: %s", |
264 | klog_printf("- debug_active: %s, debug_stop: %s", |
257 | THREAD->debug_active ? "yes(+)" : "no(-)", |
265 | THREAD->debug_active ? "yes(+)" : "no(-)", |
258 | THREAD->debug_stop ? "yes(-)" : "no(+)"); |
266 | THREAD->debug_stop ? "yes(-)" : "no(+)"); |
259 | spinlock_unlock(&THREAD->debug_lock); |
267 | spinlock_unlock(&THREAD->debug_lock); |
260 | interrupts_restore(ipl); |
268 | interrupts_restore(ipl); |
261 | return; |
269 | return; |
262 | } |
270 | } |
263 | 271 | ||
264 | klog_printf("- trigger event"); |
272 | klog_printf("- trigger event"); |
265 | 273 | ||
266 | call = THREAD->debug_go_call; |
274 | call = THREAD->debug_go_call; |
267 | IPC_SET_RETVAL(call->data, 0); |
275 | IPC_SET_RETVAL(call->data, 0); |
268 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B); |
276 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B); |
269 | IPC_SET_ARG2(call->data, (unative_t)t); |
277 | IPC_SET_ARG2(call->data, (unative_t)t); |
270 | 278 | ||
271 | /* |
279 | /* |
272 | * Make sure debug_stop is true when going to sleep |
280 | * Make sure debug_stop is true when going to sleep |
273 | * in case we get woken up by DEBUG_END. (At which |
281 | * in case we get woken up by DEBUG_END. (At which |
274 | * point it must be back to the initial true value). |
282 | * point it must be back to the initial true value). |
275 | */ |
283 | */ |
276 | THREAD->debug_stop = true; |
284 | THREAD->debug_stop = true; |
277 | 285 | ||
278 | THREAD->cur_event = UDEBUG_EVENT_THREAD_B; |
286 | THREAD->cur_event = UDEBUG_EVENT_THREAD_B; |
279 | spinlock_unlock(&THREAD->debug_lock); |
287 | spinlock_unlock(&THREAD->debug_lock); |
280 | 288 | ||
281 | spinlock_lock(&TASK->lock); |
289 | spinlock_lock(&TASK->lock); |
282 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
290 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
283 | spinlock_unlock(&TASK->lock); |
291 | spinlock_unlock(&TASK->lock); |
284 | 292 | ||
285 | interrupts_restore(ipl); |
293 | interrupts_restore(ipl); |
286 | klog_printf("- sleep"); |
294 | klog_printf("- sleep"); |
287 | udebug_wait_for_go(&THREAD->go_wq); |
295 | udebug_wait_for_go(&THREAD->go_wq); |
288 | } |
296 | } |
289 | 297 | ||
290 | void udebug_thread_e_event(void) |
298 | void udebug_thread_e_event(void) |
291 | { |
299 | { |
292 | call_t *call; |
300 | call_t *call; |
293 | ipl_t ipl; |
301 | ipl_t ipl; |
294 | 302 | ||
295 | ipl = interrupts_disable(); |
303 | ipl = interrupts_disable(); |
296 | spinlock_lock(&THREAD->debug_lock); |
304 | spinlock_lock(&THREAD->debug_lock); |
297 | 305 | ||
298 | klog_printf("udebug_thread_e_event"); |
306 | klog_printf("udebug_thread_e_event"); |
299 | klog_printf("- check state"); |
307 | klog_printf("- check state"); |
300 | 308 | ||
301 | /* Must only generate events when in debugging session */ |
309 | /* Must only generate events when in debugging session */ |
302 | if (THREAD->debug_active != true) { |
310 | if (THREAD->debug_active != true) { |
303 | klog_printf("- debug_active: %s, debug_stop: %s", |
311 | klog_printf("- debug_active: %s, debug_stop: %s", |
304 | THREAD->debug_active ? "yes(+)" : "no(-)", |
312 | THREAD->debug_active ? "yes(+)" : "no(-)", |
305 | THREAD->debug_stop ? "yes(-)" : "no(+)"); |
313 | THREAD->debug_stop ? "yes(-)" : "no(+)"); |
306 | spinlock_unlock(&THREAD->debug_lock); |
314 | spinlock_unlock(&THREAD->debug_lock); |
307 | interrupts_restore(ipl); |
315 | interrupts_restore(ipl); |
308 | return; |
316 | return; |
309 | } |
317 | } |
310 | 318 | ||
311 | klog_printf("- trigger event"); |
319 | klog_printf("- trigger event"); |
312 | 320 | ||
313 | call = THREAD->debug_go_call; |
321 | call = THREAD->debug_go_call; |
314 | IPC_SET_RETVAL(call->data, 0); |
322 | IPC_SET_RETVAL(call->data, 0); |
315 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E); |
323 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E); |
316 | 324 | ||
317 | /* Prevent any further debug activity in thread */ |
325 | /* Prevent any further debug activity in thread */ |
318 | THREAD->debug_active = false; |
326 | THREAD->debug_active = false; |
319 | THREAD->cur_event = 0; /* none */ |
327 | THREAD->cur_event = 0; /* none */ |
320 | THREAD->debug_stop = true; /* set to initial value */ |
328 | THREAD->debug_stop = true; /* set to initial value */ |
321 | spinlock_unlock(&THREAD->debug_lock); |
329 | spinlock_unlock(&THREAD->debug_lock); |
322 | 330 | ||
323 | spinlock_lock(&TASK->lock); |
331 | spinlock_lock(&TASK->lock); |
324 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
332 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
325 | spinlock_unlock(&TASK->lock); |
333 | spinlock_unlock(&TASK->lock); |
326 | 334 | ||
327 | interrupts_restore(ipl); |
335 | interrupts_restore(ipl); |
328 | 336 | ||
329 | /* This event does not sleep - debugging has finished in this thread */ |
337 | /* This event does not sleep - debugging has finished in this thread */ |
330 | } |
338 | } |
331 | 339 | ||
332 | static void breakpoint_trap_event(uintptr_t addr, udebug_event_t etype) |
340 | static void breakpoint_trap_event(uintptr_t addr, udebug_event_t etype) |
333 | { |
341 | { |
334 | call_t *call; |
342 | call_t *call; |
335 | ipl_t ipl; |
343 | ipl_t ipl; |
336 | 344 | ||
337 | ipl = interrupts_disable(); |
345 | ipl = interrupts_disable(); |
338 | spinlock_lock(&THREAD->debug_lock); |
346 | spinlock_lock(&THREAD->debug_lock); |
339 | 347 | ||
340 | /* Must only generate events when in debugging session and have go */ |
348 | /* Must only generate events when in debugging session and have go */ |
341 | if (THREAD->debug_active != true || |
349 | if (THREAD->debug_active != true || |
342 | THREAD->debug_stop == true || |
350 | THREAD->debug_stop == true || |
343 | (TASK->debug_evmask & UDEBUG_EVMASK(etype)) == 0) { |
351 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
344 | spinlock_unlock(&THREAD->debug_lock); |
352 | spinlock_unlock(&THREAD->debug_lock); |
345 | interrupts_restore(ipl); |
353 | interrupts_restore(ipl); |
346 | return; |
354 | return; |
347 | } |
355 | } |
348 | 356 | ||
349 | klog_printf("udebug_breakpoint/trap_event"); |
357 | klog_printf("udebug_breakpoint/trap_event"); |
350 | call = THREAD->debug_go_call; |
358 | call = THREAD->debug_go_call; |
351 | IPC_SET_RETVAL(call->data, 0); |
359 | IPC_SET_RETVAL(call->data, 0); |
352 | IPC_SET_ARG1(call->data, etype); |
360 | IPC_SET_ARG1(call->data, etype); |
353 | IPC_SET_ARG2(call->data, addr); |
361 | IPC_SET_ARG2(call->data, addr); |
354 | 362 | ||
355 | /* |
363 | /* |
356 | * Make sure debug_stop is true when going to sleep |
364 | * Make sure debug_stop is true when going to sleep |
357 | * in case we get woken up by DEBUG_END. (At which |
365 | * in case we get woken up by DEBUG_END. (At which |
358 | * point it must be back to the initial true value). |
366 | * point it must be back to the initial true value). |
359 | */ |
367 | */ |
360 | THREAD->debug_stop = true; |
368 | THREAD->debug_stop = true; |
361 | 369 | ||
362 | THREAD->cur_event = etype; |
370 | THREAD->cur_event = etype; |
363 | spinlock_unlock(&THREAD->debug_lock); |
371 | spinlock_unlock(&THREAD->debug_lock); |
364 | klog_printf("- send answer"); |
372 | klog_printf("- send answer"); |
365 | 373 | ||
366 | spinlock_lock(&TASK->lock); |
374 | spinlock_lock(&TASK->lock); |
367 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
375 | ipc_answer(&TASK->answerbox, THREAD->debug_go_call); |
368 | spinlock_unlock(&TASK->lock); |
376 | spinlock_unlock(&TASK->lock); |
369 | interrupts_restore(ipl); |
377 | interrupts_restore(ipl); |
370 | 378 | ||
371 | udebug_wait_for_go(&THREAD->go_wq); |
379 | udebug_wait_for_go(&THREAD->go_wq); |
372 | } |
380 | } |
373 | 381 | ||
374 | void udebug_breakpoint_event(uintptr_t addr) |
382 | void udebug_breakpoint_event(uintptr_t addr) |
375 | { |
383 | { |
376 | breakpoint_trap_event(addr, UDEBUG_EVENT_BREAKPOINT); |
384 | breakpoint_trap_event(addr, UDEBUG_EVENT_BREAKPOINT); |
377 | } |
385 | } |
378 | 386 | ||
379 | void udebug_trap_event(uintptr_t addr) |
387 | void udebug_trap_event(uintptr_t addr) |
380 | { |
388 | { |
381 | breakpoint_trap_event(addr, UDEBUG_EVENT_TRAP); |
389 | breakpoint_trap_event(addr, UDEBUG_EVENT_TRAP); |
382 | } |
390 | } |
383 | 391 | ||
384 | /** |
392 | /** |
385 | * Terminate task debugging session. |
393 | * Terminate task debugging session. |
386 | * |
394 | * |
387 | * \param ta Must be already locked and interrupts must be disabled. |
395 | * \param ta Must be already locked and interrupts must be disabled. |
388 | * \return Zero on success or negative error code. |
396 | * \return Zero on success or negative error code. |
389 | */ |
397 | */ |
390 | int udebug_task_cleanup(struct task *ta) |
398 | int udebug_task_cleanup(struct task *ta) |
391 | { |
399 | { |
392 | thread_t *t; |
400 | thread_t *t; |
393 | link_t *cur; |
401 | link_t *cur; |
394 | int flags; |
402 | int flags; |
395 | 403 | ||
396 | klog_printf("udebug_task_cleanup()"); |
404 | klog_printf("udebug_task_cleanup()"); |
397 | klog_printf("task %llu", ta->taskid); |
405 | klog_printf("task %llu", ta->taskid); |
398 | 406 | ||
399 | if (ta->dt_state == UDEBUG_TS_BEGINNING && |
407 | if (ta->udebug.dt_state == UDEBUG_TS_BEGINNING && |
400 | ta->dt_state != UDEBUG_TS_ACTIVE) { |
408 | ta->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
401 | klog_printf("udebug_task_cleanup(): task not being debugged"); |
409 | klog_printf("udebug_task_cleanup(): task not being debugged"); |
402 | return EINVAL; |
410 | return EINVAL; |
403 | } |
411 | } |
404 | 412 | ||
405 | /* Finish debugging of all userspace threads */ |
413 | /* Finish debugging of all userspace threads */ |
406 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
414 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
407 | t = list_get_instance(cur, thread_t, th_link); |
415 | t = list_get_instance(cur, thread_t, th_link); |
408 | 416 | ||
409 | spinlock_lock(&t->debug_lock); |
417 | spinlock_lock(&t->debug_lock); |
410 | spinlock_lock(&t->lock); |
418 | spinlock_lock(&t->lock); |
411 | 419 | ||
412 | flags = t->flags; |
420 | flags = t->flags; |
413 | 421 | ||
414 | spinlock_unlock(&t->lock); |
422 | spinlock_unlock(&t->lock); |
415 | 423 | ||
416 | /* Only process userspace threads */ |
424 | /* Only process userspace threads */ |
417 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
425 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
418 | /* Prevent any further debug activity in thread */ |
426 | /* Prevent any further debug activity in thread */ |
419 | t->debug_active = false; |
427 | t->debug_active = false; |
420 | t->cur_event = 0; /* none */ |
428 | t->cur_event = 0; /* none */ |
421 | 429 | ||
422 | /* Still has go? */ |
430 | /* Still has go? */ |
423 | if (t->debug_stop == false) { |
431 | if (t->debug_stop == false) { |
424 | /* |
432 | /* |
425 | * Yes, so clear go. As debug_active == false, |
433 | * Yes, so clear go. As debug_active == false, |
426 | * this doesn't affect anything. |
434 | * this doesn't affect anything. |
427 | */ |
435 | */ |
428 | t->debug_stop = true; |
436 | t->debug_stop = true; |
429 | 437 | ||
430 | /* Answer GO call */ |
438 | /* Answer GO call */ |
431 | klog_printf("answer GO call with EVENT_FINISHED"); |
439 | klog_printf("answer GO call with EVENT_FINISHED"); |
432 | IPC_SET_RETVAL(t->debug_go_call->data, 0); |
440 | IPC_SET_RETVAL(t->debug_go_call->data, 0); |
433 | IPC_SET_ARG1(t->debug_go_call->data, UDEBUG_EVENT_FINISHED); |
441 | IPC_SET_ARG1(t->debug_go_call->data, UDEBUG_EVENT_FINISHED); |
434 | ipc_answer(&ta->answerbox, t->debug_go_call); |
442 | ipc_answer(&ta->answerbox, t->debug_go_call); |
435 | } else { |
443 | } else { |
436 | /* |
444 | /* |
437 | * Debug_stop is already at initial value. |
445 | * Debug_stop is already at initial value. |
438 | * Yet this means the thread needs waking up. |
446 | * Yet this means the thread needs waking up. |
439 | */ |
447 | */ |
440 | 448 | ||
441 | /* |
449 | /* |
442 | * t's lock must not be held when calling |
450 | * t's lock must not be held when calling |
443 | * waitq_wakeup. |
451 | * waitq_wakeup. |
444 | */ |
452 | */ |
445 | waitq_wakeup(&t->go_wq, WAKEUP_FIRST); |
453 | waitq_wakeup(&t->go_wq, WAKEUP_FIRST); |
446 | } |
454 | } |
447 | } |
455 | } |
448 | spinlock_unlock(&t->debug_lock); |
456 | spinlock_unlock(&t->debug_lock); |
449 | } |
457 | } |
450 | 458 | ||
451 | ta->dt_state = UDEBUG_TS_INACTIVE; |
459 | ta->udebug.dt_state = UDEBUG_TS_INACTIVE; |
452 | ta->debugger = NULL; |
460 | ta->udebug.debugger = NULL; |
453 | 461 | ||
454 | return 0; |
462 | return 0; |
455 | } |
463 | } |
456 | 464 | ||
457 | 465 | ||
458 | /** @} |
466 | /** @} |
459 | */ |
467 | */ |
460 | 468 |