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