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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 | * Functions in this file are executed directly in each thread, which |
37 | * Functions in this file are executed directly in each thread, which |
38 | * may or may not be the subject of debugging. The udebug_stoppable_begin/end() |
38 | * may or may not be the subject of debugging. The udebug_stoppable_begin/end() |
39 | * functions are also executed in the clock interrupt handler. To avoid |
39 | * functions are also executed in the clock interrupt handler. To avoid |
40 | * deadlock, functions in this file are protected from the interrupt |
40 | * deadlock, functions in this file are protected from the interrupt |
41 | * by locking the recursive lock THREAD->udebug.int_lock (just an atomic |
41 | * by locking the recursive lock THREAD->udebug.int_lock (just an atomic |
42 | * variable). This prevents udebug_stoppable_begin/end() from being |
42 | * variable). This prevents udebug_stoppable_begin/end() from being |
43 | * executed in the interrupt handler (they are skipped). |
43 | * executed in the interrupt handler (they are skipped). |
44 | * |
44 | * |
45 | * Functions in udebug_ops.c and udebug_ipc.c execute in different threads, |
45 | * Functions in udebug_ops.c and udebug_ipc.c execute in different threads, |
46 | * so they needn't be protected from the (preemptible) interrupt-initiated |
46 | * so they needn't be protected from the (preemptible) interrupt-initiated |
47 | * code. |
47 | * code. |
48 | */ |
48 | */ |
49 | 49 | ||
50 | #include <synch/waitq.h> |
50 | #include <synch/waitq.h> |
51 | #include <print.h> |
51 | #include <print.h> |
52 | #include <udebug/udebug.h> |
52 | #include <udebug/udebug.h> |
53 | #include <errno.h> |
53 | #include <errno.h> |
54 | #include <arch.h> |
54 | #include <arch.h> |
55 | 55 | ||
56 | static inline void udebug_int_lock(void) |
56 | static inline void udebug_int_lock(void) |
57 | { |
57 | { |
58 | atomic_inc(&THREAD->udebug.int_lock); |
58 | atomic_inc(&THREAD->udebug.int_lock); |
59 | } |
59 | } |
60 | 60 | ||
61 | static inline void udebug_int_unlock(void) |
61 | static inline void udebug_int_unlock(void) |
62 | { |
62 | { |
63 | atomic_dec(&THREAD->udebug.int_lock); |
63 | atomic_dec(&THREAD->udebug.int_lock); |
64 | } |
64 | } |
65 | 65 | ||
66 | void udebug_task_init(udebug_task_t *ut) |
66 | void udebug_task_init(udebug_task_t *ut) |
67 | { |
67 | { |
68 | mutex_initialize(&ut->lock, MUTEX_PASSIVE); |
68 | mutex_initialize(&ut->lock, MUTEX_PASSIVE); |
69 | ut->dt_state = UDEBUG_TS_INACTIVE; |
69 | ut->dt_state = UDEBUG_TS_INACTIVE; |
70 | ut->begin_call = NULL; |
70 | ut->begin_call = NULL; |
71 | ut->not_stoppable_count = 0; |
71 | ut->not_stoppable_count = 0; |
72 | ut->evmask = 0; |
72 | ut->evmask = 0; |
73 | } |
73 | } |
74 | 74 | ||
75 | void udebug_thread_initialize(udebug_thread_t *ut) |
75 | void udebug_thread_initialize(udebug_thread_t *ut) |
76 | { |
76 | { |
77 | mutex_initialize(&ut->lock, MUTEX_PASSIVE); |
77 | mutex_initialize(&ut->lock, MUTEX_PASSIVE); |
78 | waitq_initialize(&ut->go_wq); |
78 | waitq_initialize(&ut->go_wq); |
79 | 79 | ||
80 | /* |
80 | /* |
81 | * At the beginning the thread is stoppable, so int_lock be set, too. |
81 | * At the beginning the thread is stoppable, so int_lock be set, too. |
82 | */ |
82 | */ |
83 | atomic_set(&ut->int_lock, 1); |
83 | atomic_set(&ut->int_lock, 1); |
84 | 84 | ||
85 | ut->go_call = NULL; |
85 | ut->go_call = NULL; |
86 | ut->uspace_state = NULL; |
86 | ut->uspace_state = NULL; |
87 | ut->stop = true; |
87 | ut->stop = true; |
88 | ut->stoppable = true; |
88 | ut->stoppable = true; |
89 | ut->debug_active = false; |
89 | ut->debug_active = false; |
90 | ut->cur_event = 0; /* none */ |
90 | ut->cur_event = 0; /* none */ |
91 | } |
91 | } |
92 | 92 | ||
93 | static void udebug_wait_for_go(waitq_t *wq) |
93 | static void udebug_wait_for_go(waitq_t *wq) |
94 | { |
94 | { |
95 | int rc; |
95 | int rc; |
96 | ipl_t ipl; |
96 | ipl_t ipl; |
97 | 97 | ||
98 | ipl = waitq_sleep_prepare(wq); |
98 | ipl = waitq_sleep_prepare(wq); |
99 | 99 | ||
100 | wq->missed_wakeups = 0; /* Enforce blocking. */ |
100 | wq->missed_wakeups = 0; /* Enforce blocking. */ |
101 | rc = waitq_sleep_timeout_unsafe(wq, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE); |
101 | rc = waitq_sleep_timeout_unsafe(wq, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE); |
102 | 102 | ||
103 | waitq_sleep_finish(wq, rc, ipl); |
103 | waitq_sleep_finish(wq, rc, ipl); |
104 | } |
104 | } |
105 | 105 | ||
106 | /** Do a preliminary check that a debugging session is in progress. |
106 | /** Do a preliminary check that a debugging session is in progress. |
107 | * |
107 | * |
108 | * This only requires the THREAD->udebug.lock mutex (and not |
108 | * This only requires the THREAD->udebug.lock mutex (and not |
109 | * TASK->udebug.lock mutex). For an undebugged task, this will |
109 | * TASK->udebug.lock mutex). For an undebugged task, this will |
110 | * never block (while there could be collisions by different threads |
110 | * never block (while there could be collisions by different threads |
111 | * on the TASK mutex), thus improving SMP perormance for undebugged tasks. |
111 | * on the TASK mutex), thus improving SMP perormance for undebugged tasks. |
112 | */ |
112 | */ |
113 | static bool udebug_thread_precheck(void) |
113 | static bool udebug_thread_precheck(void) |
114 | { |
114 | { |
115 | bool res; |
115 | bool res; |
116 | 116 | ||
117 | mutex_lock(&THREAD->udebug.lock); |
117 | mutex_lock(&THREAD->udebug.lock); |
118 | res = THREAD->udebug.debug_active; |
118 | res = THREAD->udebug.debug_active; |
119 | mutex_unlock(&THREAD->udebug.lock); |
119 | mutex_unlock(&THREAD->udebug.lock); |
120 | 120 | ||
121 | return res; |
121 | return res; |
122 | } |
122 | } |
123 | 123 | ||
124 | void udebug_stoppable_begin(void) |
124 | void udebug_stoppable_begin(void) |
125 | { |
125 | { |
126 | int nsc; |
126 | int nsc; |
127 | call_t *db_call, *go_call; |
127 | call_t *db_call, *go_call; |
128 | 128 | ||
129 | ASSERT(THREAD); |
129 | ASSERT(THREAD); |
130 | ASSERT(TASK); |
130 | ASSERT(TASK); |
131 | 131 | ||
132 | udebug_int_lock(); |
132 | udebug_int_lock(); |
133 | 133 | ||
134 | /* Early check for undebugged tasks */ |
134 | /* Early check for undebugged tasks */ |
135 | if (!udebug_thread_precheck()) { |
135 | if (!udebug_thread_precheck()) { |
136 | udebug_int_unlock(); |
136 | udebug_int_unlock(); |
137 | return; |
137 | return; |
138 | } |
138 | } |
139 | 139 | ||
140 | mutex_lock(&TASK->udebug.lock); |
140 | mutex_lock(&TASK->udebug.lock); |
141 | 141 | ||
142 | nsc = --TASK->udebug.not_stoppable_count; |
142 | nsc = --TASK->udebug.not_stoppable_count; |
143 | 143 | ||
144 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
144 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
145 | mutex_lock(&THREAD->udebug.lock); |
145 | mutex_lock(&THREAD->udebug.lock); |
146 | ASSERT(THREAD->udebug.stoppable == false); |
146 | ASSERT(THREAD->udebug.stoppable == false); |
147 | THREAD->udebug.stoppable = true; |
147 | THREAD->udebug.stoppable = true; |
148 | 148 | ||
149 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING && nsc == 0) { |
149 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING && nsc == 0) { |
150 | /* |
150 | /* |
151 | * This was the last non-stoppable thread. Reply to |
151 | * This was the last non-stoppable thread. Reply to |
152 | * DEBUG_BEGIN call. |
152 | * DEBUG_BEGIN call. |
153 | */ |
153 | */ |
154 | 154 | ||
155 | db_call = TASK->udebug.begin_call; |
155 | db_call = TASK->udebug.begin_call; |
156 | ASSERT(db_call); |
156 | ASSERT(db_call); |
157 | 157 | ||
158 | TASK->udebug.dt_state = UDEBUG_TS_ACTIVE; |
158 | TASK->udebug.dt_state = UDEBUG_TS_ACTIVE; |
159 | TASK->udebug.begin_call = NULL; |
159 | TASK->udebug.begin_call = NULL; |
160 | 160 | ||
161 | IPC_SET_RETVAL(db_call->data, 0); |
161 | IPC_SET_RETVAL(db_call->data, 0); |
162 | ipc_answer(&TASK->answerbox, db_call); |
162 | ipc_answer(&TASK->answerbox, db_call); |
163 | 163 | ||
164 | } else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
164 | } else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
165 | /* |
165 | /* |
166 | * Active debugging session |
166 | * Active debugging session |
167 | */ |
167 | */ |
168 | 168 | ||
169 | if (THREAD->udebug.debug_active && THREAD->udebug.stop) { |
169 | if (THREAD->udebug.debug_active && THREAD->udebug.stop) { |
170 | /* |
170 | /* |
171 | * Thread was requested to stop - answer go call |
171 | * Thread was requested to stop - answer go call |
172 | */ |
172 | */ |
173 | 173 | ||
174 | /* Make sure nobody takes this call away from us */ |
174 | /* Make sure nobody takes this call away from us */ |
175 | go_call = THREAD->udebug.go_call; |
175 | go_call = THREAD->udebug.go_call; |
176 | THREAD->udebug.go_call = NULL; |
176 | THREAD->udebug.go_call = NULL; |
177 | ASSERT(go_call); |
177 | ASSERT(go_call); |
178 | 178 | ||
179 | IPC_SET_RETVAL(go_call->data, 0); |
179 | IPC_SET_RETVAL(go_call->data, 0); |
180 | IPC_SET_ARG1(go_call->data, UDEBUG_EVENT_STOP); |
180 | IPC_SET_ARG1(go_call->data, UDEBUG_EVENT_STOP); |
181 | 181 | ||
182 | THREAD->udebug.cur_event = UDEBUG_EVENT_STOP; |
182 | THREAD->udebug.cur_event = UDEBUG_EVENT_STOP; |
183 | 183 | ||
184 | ipc_answer(&TASK->answerbox, go_call); |
184 | ipc_answer(&TASK->answerbox, go_call); |
185 | } |
185 | } |
186 | } |
186 | } |
187 | 187 | ||
188 | mutex_unlock(&THREAD->udebug.lock); |
188 | mutex_unlock(&THREAD->udebug.lock); |
189 | mutex_unlock(&TASK->udebug.lock); |
189 | mutex_unlock(&TASK->udebug.lock); |
190 | } |
190 | } |
191 | 191 | ||
192 | void udebug_stoppable_end(void) |
192 | void udebug_stoppable_end(void) |
193 | { |
193 | { |
194 | /* Early check for undebugged tasks */ |
194 | /* Early check for undebugged tasks */ |
195 | if (!udebug_thread_precheck()) { |
195 | if (!udebug_thread_precheck()) { |
196 | udebug_int_unlock(); |
196 | udebug_int_unlock(); |
197 | return; |
197 | return; |
198 | } |
198 | } |
199 | 199 | ||
200 | restart: |
200 | restart: |
201 | mutex_lock(&TASK->udebug.lock); |
201 | mutex_lock(&TASK->udebug.lock); |
202 | mutex_lock(&THREAD->udebug.lock); |
202 | mutex_lock(&THREAD->udebug.lock); |
203 | 203 | ||
204 | if (THREAD->udebug.debug_active && |
204 | if (THREAD->udebug.debug_active && |
205 | THREAD->udebug.stop == true) { |
205 | THREAD->udebug.stop == true) { |
206 | TASK->udebug.begin_call = NULL; |
206 | TASK->udebug.begin_call = NULL; |
207 | mutex_unlock(&THREAD->udebug.lock); |
207 | mutex_unlock(&THREAD->udebug.lock); |
208 | mutex_unlock(&TASK->udebug.lock); |
208 | mutex_unlock(&TASK->udebug.lock); |
209 | 209 | ||
210 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
210 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
211 | 211 | ||
212 | goto restart; |
212 | goto restart; |
213 | /* must try again - have to lose stoppability atomically */ |
213 | /* must try again - have to lose stoppability atomically */ |
214 | } else { |
214 | } else { |
215 | ++TASK->udebug.not_stoppable_count; |
215 | ++TASK->udebug.not_stoppable_count; |
216 | ASSERT(THREAD->udebug.stoppable == true); |
216 | ASSERT(THREAD->udebug.stoppable == true); |
217 | THREAD->udebug.stoppable = false; |
217 | THREAD->udebug.stoppable = false; |
218 | 218 | ||
219 | mutex_unlock(&THREAD->udebug.lock); |
219 | mutex_unlock(&THREAD->udebug.lock); |
220 | mutex_unlock(&TASK->udebug.lock); |
220 | mutex_unlock(&TASK->udebug.lock); |
221 | } |
221 | } |
222 | 222 | ||
223 | udebug_int_unlock(); |
223 | udebug_int_unlock(); |
224 | } |
224 | } |
225 | 225 | ||
226 | /** Upon being scheduled to run, check if the current thread should stop. |
226 | /** Upon being scheduled to run, check if the current thread should stop. |
227 | * |
227 | * |
228 | * This function is called from clock(). Preemption is enabled. |
228 | * This function is called from clock(). Preemption is enabled. |
229 | * interrupts are disabled, but since this is called after |
229 | * interrupts are disabled, but since this is called after |
230 | * being scheduled-in, we can enable them, if we're careful enough |
230 | * being scheduled-in, we can enable them, if we're careful enough |
231 | * not to allow arbitrary recursion or deadlock with the thread context. |
231 | * not to allow arbitrary recursion or deadlock with the thread context. |
232 | */ |
232 | */ |
233 | void udebug_before_thread_runs(void) |
233 | void udebug_before_thread_runs(void) |
234 | { |
234 | { |
235 | ipl_t ipl; |
235 | ipl_t ipl; |
236 | 236 | ||
237 | return; |
237 | return; |
238 | ASSERT(!PREEMPTION_DISABLED); |
238 | ASSERT(!PREEMPTION_DISABLED); |
239 | 239 | ||
240 | /* |
240 | /* |
241 | * Prevent agains re-entering, such as when preempted inside this |
241 | * Prevent agains re-entering, such as when preempted inside this |
242 | * function. |
242 | * function. |
243 | */ |
243 | */ |
244 | if (atomic_get(&THREAD->udebug.int_lock) != 0) |
244 | if (atomic_get(&THREAD->udebug.int_lock) != 0) |
245 | return; |
245 | return; |
246 | 246 | ||
247 | udebug_int_lock(); |
247 | udebug_int_lock(); |
248 | 248 | ||
249 | ipl = interrupts_enable(); |
249 | ipl = interrupts_enable(); |
250 | 250 | ||
251 | /* Now we're free to do whatever we need (lock mutexes, sleep, etc.) */ |
251 | /* Now we're free to do whatever we need (lock mutexes, sleep, etc.) */ |
252 | 252 | ||
253 | /* Check if we're supposed to stop */ |
253 | /* Check if we're supposed to stop */ |
254 | udebug_stoppable_begin(); |
254 | udebug_stoppable_begin(); |
255 | udebug_stoppable_end(); |
255 | udebug_stoppable_end(); |
256 | 256 | ||
257 | interrupts_restore(ipl); |
257 | interrupts_restore(ipl); |
258 | 258 | ||
259 | udebug_int_unlock(); |
259 | udebug_int_unlock(); |
260 | } |
260 | } |
261 | 261 | ||
262 | void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3, |
262 | void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3, |
263 | unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc, |
263 | unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc, |
264 | bool end_variant) |
264 | bool end_variant) |
265 | { |
265 | { |
266 | call_t *call; |
266 | call_t *call; |
267 | udebug_event_t etype; |
267 | udebug_event_t etype; |
268 | 268 | ||
269 | etype = end_variant ? UDEBUG_EVENT_SYSCALL_E : UDEBUG_EVENT_SYSCALL_B; |
269 | etype = end_variant ? UDEBUG_EVENT_SYSCALL_E : UDEBUG_EVENT_SYSCALL_B; |
270 | 270 | ||
271 | udebug_int_lock(); |
271 | udebug_int_lock(); |
272 | 272 | ||
273 | /* Early check for undebugged tasks */ |
273 | /* Early check for undebugged tasks */ |
274 | if (!udebug_thread_precheck()) { |
274 | if (!udebug_thread_precheck()) { |
275 | udebug_int_unlock(); |
275 | udebug_int_unlock(); |
276 | return; |
276 | return; |
277 | } |
277 | } |
278 | 278 | ||
279 | mutex_lock(&TASK->udebug.lock); |
279 | mutex_lock(&TASK->udebug.lock); |
280 | mutex_lock(&THREAD->udebug.lock); |
280 | mutex_lock(&THREAD->udebug.lock); |
281 | 281 | ||
282 | /* Must only generate events when in debugging session and have go */ |
282 | /* Must only generate events when in debugging session and have go */ |
283 | if (THREAD->udebug.debug_active != true || |
283 | if (THREAD->udebug.debug_active != true || |
284 | THREAD->udebug.stop == true || |
284 | THREAD->udebug.stop == true || |
285 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
285 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
286 | mutex_unlock(&THREAD->udebug.lock); |
286 | mutex_unlock(&THREAD->udebug.lock); |
287 | mutex_unlock(&TASK->udebug.lock); |
287 | mutex_unlock(&TASK->udebug.lock); |
288 | return; |
288 | return; |
289 | } |
289 | } |
290 | 290 | ||
291 | //printf("udebug_syscall_event\n"); |
291 | //printf("udebug_syscall_event\n"); |
292 | call = THREAD->udebug.go_call; |
292 | call = THREAD->udebug.go_call; |
293 | THREAD->udebug.go_call = NULL; |
293 | THREAD->udebug.go_call = NULL; |
294 | 294 | ||
295 | IPC_SET_RETVAL(call->data, 0); |
295 | IPC_SET_RETVAL(call->data, 0); |
296 | IPC_SET_ARG1(call->data, etype); |
296 | IPC_SET_ARG1(call->data, etype); |
297 | IPC_SET_ARG2(call->data, id); |
297 | IPC_SET_ARG2(call->data, id); |
298 | IPC_SET_ARG3(call->data, rc); |
298 | IPC_SET_ARG3(call->data, rc); |
299 | //printf("udebug_syscall_event/ipc_answer\n"); |
299 | //printf("udebug_syscall_event/ipc_answer\n"); |
300 | 300 | ||
301 | THREAD->udebug.syscall_args[0] = a1; |
301 | THREAD->udebug.syscall_args[0] = a1; |
302 | THREAD->udebug.syscall_args[1] = a2; |
302 | THREAD->udebug.syscall_args[1] = a2; |
303 | THREAD->udebug.syscall_args[2] = a3; |
303 | THREAD->udebug.syscall_args[2] = a3; |
304 | THREAD->udebug.syscall_args[3] = a4; |
304 | THREAD->udebug.syscall_args[3] = a4; |
305 | THREAD->udebug.syscall_args[4] = a5; |
305 | THREAD->udebug.syscall_args[4] = a5; |
306 | THREAD->udebug.syscall_args[5] = a6; |
306 | THREAD->udebug.syscall_args[5] = a6; |
307 | 307 | ||
308 | /* |
308 | /* |
309 | * Make sure udebug.stop is true when going to sleep |
309 | * Make sure udebug.stop is true when going to sleep |
310 | * in case we get woken up by DEBUG_END. (At which |
310 | * in case we get woken up by DEBUG_END. (At which |
311 | * point it must be back to the initial true value). |
311 | * point it must be back to the initial true value). |
312 | */ |
312 | */ |
313 | THREAD->udebug.stop = true; |
313 | THREAD->udebug.stop = true; |
314 | THREAD->udebug.cur_event = etype; |
314 | THREAD->udebug.cur_event = etype; |
315 | 315 | ||
316 | ipc_answer(&TASK->answerbox, call); |
316 | ipc_answer(&TASK->answerbox, call); |
317 | 317 | ||
318 | mutex_unlock(&THREAD->udebug.lock); |
318 | mutex_unlock(&THREAD->udebug.lock); |
319 | mutex_unlock(&TASK->udebug.lock); |
319 | mutex_unlock(&TASK->udebug.lock); |
320 | 320 | ||
321 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
321 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
322 | 322 | ||
323 | udebug_int_unlock(); |
323 | udebug_int_unlock(); |
324 | } |
324 | } |
325 | 325 | ||
326 | void udebug_thread_b_event(struct thread *t) |
326 | void udebug_thread_b_event(struct thread *t) |
327 | { |
327 | { |
328 | call_t *call; |
328 | call_t *call; |
329 | 329 | ||
330 | udebug_int_lock(); |
330 | udebug_int_lock(); |
331 | 331 | ||
332 | mutex_lock(&TASK->udebug.lock); |
332 | mutex_lock(&TASK->udebug.lock); |
333 | mutex_lock(&THREAD->udebug.lock); |
333 | mutex_lock(&THREAD->udebug.lock); |
334 | 334 | ||
335 | printf("udebug_thread_b_event\n"); |
335 | printf("udebug_thread_b_event\n"); |
336 | printf("- check state\n"); |
336 | printf("- check state\n"); |
337 | 337 | ||
338 | /* Must only generate events when in debugging session */ |
338 | /* Must only generate events when in debugging session */ |
339 | if (THREAD->udebug.debug_active != true) { |
339 | if (THREAD->udebug.debug_active != true) { |
340 | printf("- debug_active: %s, udebug.stop: %s\n", |
340 | printf("- debug_active: %s, udebug.stop: %s\n", |
341 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
341 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
342 | THREAD->udebug.stop ? "yes(-)" : "no(+)"); |
342 | THREAD->udebug.stop ? "yes(-)" : "no(+)"); |
343 | mutex_unlock(&THREAD->udebug.lock); |
343 | mutex_unlock(&THREAD->udebug.lock); |
344 | mutex_unlock(&TASK->udebug.lock); |
344 | mutex_unlock(&TASK->udebug.lock); |
345 | return; |
345 | return; |
346 | } |
346 | } |
347 | 347 | ||
348 | printf("- trigger event\n"); |
348 | printf("- trigger event\n"); |
349 | 349 | ||
350 | call = THREAD->udebug.go_call; |
350 | call = THREAD->udebug.go_call; |
351 | THREAD->udebug.go_call = NULL; |
351 | THREAD->udebug.go_call = NULL; |
352 | IPC_SET_RETVAL(call->data, 0); |
352 | IPC_SET_RETVAL(call->data, 0); |
353 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B); |
353 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B); |
354 | IPC_SET_ARG2(call->data, (unative_t)t); |
354 | IPC_SET_ARG2(call->data, (unative_t)t); |
355 | 355 | ||
356 | /* |
356 | /* |
357 | * Make sure udebug.stop is true when going to sleep |
357 | * Make sure udebug.stop is true when going to sleep |
358 | * in case we get woken up by DEBUG_END. (At which |
358 | * in case we get woken up by DEBUG_END. (At which |
359 | * point it must be back to the initial true value). |
359 | * point it must be back to the initial true value). |
360 | */ |
360 | */ |
361 | THREAD->udebug.stop = true; |
361 | THREAD->udebug.stop = true; |
362 | THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B; |
362 | THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B; |
363 | 363 | ||
364 | ipc_answer(&TASK->answerbox, call); |
364 | ipc_answer(&TASK->answerbox, call); |
365 | 365 | ||
366 | mutex_unlock(&THREAD->udebug.lock); |
366 | mutex_unlock(&THREAD->udebug.lock); |
367 | mutex_unlock(&TASK->udebug.lock); |
367 | mutex_unlock(&TASK->udebug.lock); |
368 | 368 | ||
369 | printf("- sleep\n"); |
369 | printf("- sleep\n"); |
370 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
370 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
371 | 371 | ||
372 | udebug_int_unlock(); |
372 | udebug_int_unlock(); |
373 | } |
373 | } |
374 | 374 | ||
375 | void udebug_thread_e_event(void) |
375 | void udebug_thread_e_event(void) |
376 | { |
376 | { |
377 | call_t *call; |
377 | call_t *call; |
378 | 378 | ||
379 | udebug_int_lock(); |
379 | udebug_int_lock(); |
380 | 380 | ||
381 | mutex_lock(&TASK->udebug.lock); |
381 | mutex_lock(&TASK->udebug.lock); |
382 | mutex_lock(&THREAD->udebug.lock); |
382 | mutex_lock(&THREAD->udebug.lock); |
383 | 383 | ||
384 | printf("udebug_thread_e_event\n"); |
384 | // printf("udebug_thread_e_event\n"); |
385 | printf("- check state\n"); |
385 | // printf("- check state\n"); |
386 | 386 | ||
387 | /* Must only generate events when in debugging session */ |
387 | /* Must only generate events when in debugging session */ |
388 | if (THREAD->udebug.debug_active != true) { |
388 | if (THREAD->udebug.debug_active != true) { |
389 | printf("- debug_active: %s, udebug.stop: %s\n", |
389 | /* printf("- debug_active: %s, udebug.stop: %s\n", |
390 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
390 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
391 | THREAD->udebug.stop ? "yes(-)" : "no(+)"); |
391 | THREAD->udebug.stop ? "yes(-)" : "no(+)");*/ |
392 | mutex_unlock(&THREAD->udebug.lock); |
392 | mutex_unlock(&THREAD->udebug.lock); |
393 | mutex_unlock(&TASK->udebug.lock); |
393 | mutex_unlock(&TASK->udebug.lock); |
394 | return; |
394 | return; |
395 | } |
395 | } |
396 | 396 | ||
397 | printf("- trigger event\n"); |
397 | // printf("- trigger event\n"); |
398 | 398 | ||
399 | call = THREAD->udebug.go_call; |
399 | call = THREAD->udebug.go_call; |
400 | THREAD->udebug.go_call = NULL; |
400 | THREAD->udebug.go_call = NULL; |
401 | IPC_SET_RETVAL(call->data, 0); |
401 | IPC_SET_RETVAL(call->data, 0); |
402 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E); |
402 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E); |
403 | 403 | ||
404 | /* Prevent any further debug activity in thread */ |
404 | /* Prevent any further debug activity in thread */ |
405 | THREAD->udebug.debug_active = false; |
405 | THREAD->udebug.debug_active = false; |
406 | THREAD->udebug.cur_event = 0; /* none */ |
406 | THREAD->udebug.cur_event = 0; /* none */ |
407 | THREAD->udebug.stop = true; /* set to initial value */ |
407 | THREAD->udebug.stop = true; /* set to initial value */ |
408 | 408 | ||
409 | ipc_answer(&TASK->answerbox, call); |
409 | ipc_answer(&TASK->answerbox, call); |
410 | 410 | ||
411 | mutex_unlock(&THREAD->udebug.lock); |
411 | mutex_unlock(&THREAD->udebug.lock); |
412 | mutex_unlock(&TASK->udebug.lock); |
412 | mutex_unlock(&TASK->udebug.lock); |
413 | 413 | ||
414 | /* Leave int_lock enabled */ |
414 | /* Leave int_lock enabled */ |
415 | /* This event does not sleep - debugging has finished in this thread */ |
415 | /* This event does not sleep - debugging has finished in this thread */ |
416 | } |
416 | } |
417 | 417 | ||
418 | static void breakpoint_trap_event(uintptr_t addr, udebug_event_t etype) |
418 | static void breakpoint_trap_event(uintptr_t addr, udebug_event_t etype) |
419 | { |
419 | { |
420 | call_t *call; |
420 | call_t *call; |
421 | 421 | ||
422 | udebug_int_lock(); |
422 | udebug_int_lock(); |
423 | 423 | ||
424 | mutex_lock(&TASK->udebug.lock); |
424 | mutex_lock(&TASK->udebug.lock); |
425 | mutex_lock(&THREAD->udebug.lock); |
425 | mutex_lock(&THREAD->udebug.lock); |
426 | 426 | ||
427 | /* Must only generate events when in debugging session and have go */ |
427 | /* Must only generate events when in debugging session and have go */ |
428 | if (THREAD->udebug.debug_active != true || |
428 | if (THREAD->udebug.debug_active != true || |
429 | THREAD->udebug.stop == true) { |
429 | THREAD->udebug.stop == true) { |
430 | mutex_unlock(&THREAD->udebug.lock); |
430 | mutex_unlock(&THREAD->udebug.lock); |
431 | mutex_unlock(&TASK->udebug.lock); |
431 | mutex_unlock(&TASK->udebug.lock); |
432 | udebug_int_unlock(); |
432 | udebug_int_unlock(); |
433 | return; |
433 | return; |
434 | } |
434 | } |
435 | 435 | ||
436 | /* Verify that the event is enabled */ |
436 | /* Verify that the event is enabled */ |
437 | if ((TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
437 | if ((TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
438 | mutex_unlock(&THREAD->udebug.lock); |
438 | mutex_unlock(&THREAD->udebug.lock); |
439 | mutex_unlock(&TASK->udebug.lock); |
439 | mutex_unlock(&TASK->udebug.lock); |
440 | udebug_int_unlock(); |
440 | udebug_int_unlock(); |
441 | return; |
441 | return; |
442 | } |
442 | } |
443 | 443 | ||
444 | printf("udebug_breakpoint/trap_event\n"); |
444 | printf("udebug_breakpoint/trap_event\n"); |
445 | call = THREAD->udebug.go_call; |
445 | call = THREAD->udebug.go_call; |
446 | THREAD->udebug.go_call = NULL; |
446 | THREAD->udebug.go_call = NULL; |
447 | 447 | ||
448 | IPC_SET_RETVAL(call->data, 0); |
448 | IPC_SET_RETVAL(call->data, 0); |
449 | IPC_SET_ARG1(call->data, etype); |
449 | IPC_SET_ARG1(call->data, etype); |
450 | IPC_SET_ARG2(call->data, addr); |
450 | IPC_SET_ARG2(call->data, addr); |
451 | 451 | ||
452 | /* |
452 | /* |
453 | * Make sure udebug.stop is true when going to sleep |
453 | * Make sure udebug.stop is true when going to sleep |
454 | * in case we get woken up by DEBUG_END. (At which |
454 | * in case we get woken up by DEBUG_END. (At which |
455 | * point it must be back to the initial true value). |
455 | * point it must be back to the initial true value). |
456 | */ |
456 | */ |
457 | THREAD->udebug.stop = true; |
457 | THREAD->udebug.stop = true; |
458 | THREAD->udebug.cur_event = etype; |
458 | THREAD->udebug.cur_event = etype; |
459 | 459 | ||
460 | printf("- send answer\n"); |
460 | printf("- send answer\n"); |
461 | ipc_answer(&TASK->answerbox, call); |
461 | ipc_answer(&TASK->answerbox, call); |
462 | 462 | ||
463 | mutex_unlock(&THREAD->udebug.lock); |
463 | mutex_unlock(&THREAD->udebug.lock); |
464 | mutex_unlock(&TASK->udebug.lock); |
464 | mutex_unlock(&TASK->udebug.lock); |
465 | 465 | ||
466 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
466 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
467 | 467 | ||
468 | udebug_int_unlock(); |
468 | udebug_int_unlock(); |
469 | } |
469 | } |
470 | 470 | ||
471 | void udebug_breakpoint_event(uintptr_t addr) |
471 | void udebug_breakpoint_event(uintptr_t addr) |
472 | { |
472 | { |
473 | breakpoint_trap_event(addr, UDEBUG_EVENT_BREAKPOINT); |
473 | breakpoint_trap_event(addr, UDEBUG_EVENT_BREAKPOINT); |
474 | } |
474 | } |
475 | 475 | ||
476 | void udebug_trap_event(uintptr_t addr) |
476 | void udebug_trap_event(uintptr_t addr) |
477 | { |
477 | { |
478 | breakpoint_trap_event(addr, UDEBUG_EVENT_TRAP); |
478 | breakpoint_trap_event(addr, UDEBUG_EVENT_TRAP); |
479 | } |
479 | } |
480 | 480 | ||
481 | /** |
481 | /** |
482 | * Terminate task debugging session. |
482 | * Terminate task debugging session. |
483 | * |
483 | * |
484 | * \param ta->udebug.lock must be already locked. |
484 | * \param ta->udebug.lock must be already locked. |
485 | * \return Zero on success or negative error code. |
485 | * \return Zero on success or negative error code. |
486 | */ |
486 | */ |
487 | int udebug_task_cleanup(struct task *ta) |
487 | int udebug_task_cleanup(struct task *ta) |
488 | { |
488 | { |
489 | thread_t *t; |
489 | thread_t *t; |
490 | link_t *cur; |
490 | link_t *cur; |
491 | int flags; |
491 | int flags; |
492 | ipl_t ipl; |
492 | ipl_t ipl; |
493 | 493 | ||
494 | printf("udebug_task_cleanup()\n"); |
494 | printf("udebug_task_cleanup()\n"); |
495 | printf("task %llu\n", ta->taskid); |
495 | printf("task %llu\n", ta->taskid); |
496 | 496 | ||
497 | udebug_int_lock(); |
497 | udebug_int_lock(); |
498 | 498 | ||
499 | if (ta->udebug.dt_state != UDEBUG_TS_BEGINNING && |
499 | if (ta->udebug.dt_state != UDEBUG_TS_BEGINNING && |
500 | ta->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
500 | ta->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
501 | printf("udebug_task_cleanup(): task not being debugged\n"); |
501 | printf("udebug_task_cleanup(): task not being debugged\n"); |
502 | return EINVAL; |
502 | return EINVAL; |
503 | } |
503 | } |
504 | 504 | ||
505 | /* Finish debugging of all userspace threads */ |
505 | /* Finish debugging of all userspace threads */ |
506 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
506 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
507 | t = list_get_instance(cur, thread_t, th_link); |
507 | t = list_get_instance(cur, thread_t, th_link); |
508 | 508 | ||
509 | mutex_lock(&t->udebug.lock); |
509 | mutex_lock(&t->udebug.lock); |
510 | 510 | ||
511 | ipl = interrupts_disable(); |
511 | ipl = interrupts_disable(); |
512 | spinlock_lock(&t->lock); |
512 | spinlock_lock(&t->lock); |
513 | 513 | ||
514 | flags = t->flags; |
514 | flags = t->flags; |
515 | 515 | ||
516 | spinlock_unlock(&t->lock); |
516 | spinlock_unlock(&t->lock); |
517 | interrupts_restore(ipl); |
517 | interrupts_restore(ipl); |
518 | 518 | ||
519 | /* Only process userspace threads */ |
519 | /* Only process userspace threads */ |
520 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
520 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
521 | /* Prevent any further debug activity in thread */ |
521 | /* Prevent any further debug activity in thread */ |
522 | t->udebug.debug_active = false; |
522 | t->udebug.debug_active = false; |
523 | t->udebug.cur_event = 0; /* none */ |
523 | t->udebug.cur_event = 0; /* none */ |
524 | 524 | ||
525 | /* Still has go? */ |
525 | /* Still has go? */ |
526 | if (t->udebug.stop == false) { |
526 | if (t->udebug.stop == false) { |
527 | /* |
527 | /* |
528 | * Yes, so clear go. As debug_active == false, |
528 | * Yes, so clear go. As debug_active == false, |
529 | * this doesn't affect anything. |
529 | * this doesn't affect anything. |
530 | */ |
530 | */ |
531 | t->udebug.stop = true; |
531 | t->udebug.stop = true; |
532 | 532 | ||
533 | /* Answer GO call */ |
533 | /* Answer GO call */ |
534 | printf("answer GO call with EVENT_FINISHED\n"); |
534 | printf("answer GO call with EVENT_FINISHED\n"); |
535 | IPC_SET_RETVAL(t->udebug.go_call->data, 0); |
535 | IPC_SET_RETVAL(t->udebug.go_call->data, 0); |
536 | IPC_SET_ARG1(t->udebug.go_call->data, UDEBUG_EVENT_FINISHED); |
536 | IPC_SET_ARG1(t->udebug.go_call->data, UDEBUG_EVENT_FINISHED); |
537 | 537 | ||
538 | ipc_answer(&ta->answerbox, t->udebug.go_call); |
538 | ipc_answer(&ta->answerbox, t->udebug.go_call); |
539 | t->udebug.go_call = NULL; |
539 | t->udebug.go_call = NULL; |
540 | } else { |
540 | } else { |
541 | /* |
541 | /* |
542 | * Debug_stop is already at initial value. |
542 | * Debug_stop is already at initial value. |
543 | * Yet this means the thread needs waking up. |
543 | * Yet this means the thread needs waking up. |
544 | */ |
544 | */ |
545 | 545 | ||
546 | /* |
546 | /* |
547 | * t's lock must not be held when calling |
547 | * t's lock must not be held when calling |
548 | * waitq_wakeup. |
548 | * waitq_wakeup. |
549 | */ |
549 | */ |
550 | waitq_wakeup(&t->udebug.go_wq, WAKEUP_FIRST); |
550 | waitq_wakeup(&t->udebug.go_wq, WAKEUP_FIRST); |
551 | } |
551 | } |
552 | } |
552 | } |
553 | mutex_unlock(&t->udebug.lock); |
553 | mutex_unlock(&t->udebug.lock); |
554 | } |
554 | } |
555 | 555 | ||
556 | ta->udebug.dt_state = UDEBUG_TS_INACTIVE; |
556 | ta->udebug.dt_state = UDEBUG_TS_INACTIVE; |
557 | ta->udebug.debugger = NULL; |
557 | ta->udebug.debugger = NULL; |
558 | 558 | ||
559 | udebug_int_unlock(); |
559 | udebug_int_unlock(); |
560 | 560 | ||
561 | return 0; |
561 | return 0; |
562 | } |
562 | } |
563 | 563 | ||
564 | 564 | ||
565 | /** @} |
565 | /** @} |
566 | */ |
566 | */ |
567 | 567 |