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2894 | svoboda | 1 | /* |
2 | * Copyright (c) 2008 Jiri Svoboda |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
2801 | svoboda | 29 | /** @addtogroup generic |
30 | * @{ |
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31 | */ |
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32 | |||
33 | /** |
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34 | * @file |
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2894 | svoboda | 35 | * @brief Udebug. |
2801 | svoboda | 36 | */ |
37 | |||
38 | #include <synch/waitq.h> |
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39 | #include <console/klog.h> |
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2813 | svoboda | 40 | #include <udebug/udebug.h> |
2870 | svoboda | 41 | #include <errno.h> |
2801 | svoboda | 42 | #include <arch.h> |
43 | |||
3026 | svoboda | 44 | /* |
45 | * FIXME: Don't grab TASK->udebug.lock in this module, synchronize |
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46 | * only with THREAD->udebug.lock. |
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47 | * |
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48 | * For this reason, TASK->udebug.lock is not guarded against the interrupt |
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49 | * handler in udebug_ops.c. (which could deadlock) |
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50 | */ |
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51 | |||
52 | static inline void udebug_int_lock(void) |
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53 | { |
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54 | atomic_inc(&THREAD->udebug.int_lock); |
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55 | } |
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56 | |||
57 | static inline void udebug_int_unlock(void) |
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58 | { |
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59 | atomic_dec(&THREAD->udebug.int_lock); |
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60 | } |
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61 | |||
3014 | svoboda | 62 | void udebug_task_init(udebug_task_t *ut) |
63 | { |
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3016 | svoboda | 64 | mutex_initialize(&ut->lock); |
3014 | svoboda | 65 | ut->dt_state = UDEBUG_TS_INACTIVE; |
66 | ut->begin_call = NULL; |
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67 | ut->not_stoppable_count = 0; |
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68 | ut->evmask = 0; |
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69 | } |
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70 | |||
3018 | svoboda | 71 | void udebug_thread_initialize(udebug_thread_t *ut) |
72 | { |
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3026 | svoboda | 73 | mutex_initialize(&ut->lock); |
3018 | svoboda | 74 | waitq_initialize(&ut->go_wq); |
3026 | svoboda | 75 | |
76 | /* |
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77 | * At the beginning the thread is stoppable, so int_lock be set, too. |
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78 | */ |
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79 | atomic_set(&ut->int_lock, 1); |
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80 | |||
3018 | svoboda | 81 | ut->go_call = NULL; |
82 | ut->uspace_state = NULL; |
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83 | ut->stop = true; |
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84 | ut->stoppable = true; |
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85 | ut->debug_active = false; |
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86 | ut->cur_event = 0; /* none */ |
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87 | } |
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88 | |||
2917 | svoboda | 89 | static void udebug_wait_for_go(waitq_t *wq) |
90 | { |
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91 | int rc; |
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92 | ipl_t ipl; |
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93 | |||
94 | ipl = waitq_sleep_prepare(wq); |
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95 | |||
96 | wq->missed_wakeups = 0; /* Enforce blocking. */ |
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97 | rc = waitq_sleep_timeout_unsafe(wq, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE); |
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98 | |||
99 | waitq_sleep_finish(wq, rc, ipl); |
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100 | } |
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101 | |||
2804 | svoboda | 102 | void udebug_stoppable_begin(void) |
2801 | svoboda | 103 | { |
2804 | svoboda | 104 | int nsc; |
2898 | svoboda | 105 | call_t *db_call, *go_call; |
2804 | svoboda | 106 | |
2902 | svoboda | 107 | ASSERT(THREAD); |
108 | ASSERT(TASK); |
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109 | |||
3026 | svoboda | 110 | udebug_int_lock(); |
111 | |||
3016 | svoboda | 112 | mutex_lock(&TASK->udebug.lock); |
2804 | svoboda | 113 | |
3014 | svoboda | 114 | nsc = --TASK->udebug.not_stoppable_count; |
2804 | svoboda | 115 | |
3014 | svoboda | 116 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING) { |
2804 | svoboda | 117 | klog_printf("udebug_stoppable_begin"); |
118 | klog_printf(" - nsc := %d", nsc); |
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119 | } |
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120 | |||
3014 | svoboda | 121 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING && nsc == 0) { |
2898 | svoboda | 122 | /* |
123 | * This was the last non-stoppable thread. Reply to |
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124 | * DEBUG_BEGIN call. |
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125 | */ |
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126 | |||
3014 | svoboda | 127 | db_call = TASK->udebug.begin_call; |
2902 | svoboda | 128 | ASSERT(db_call); |
129 | |||
3018 | svoboda | 130 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
3026 | svoboda | 131 | mutex_lock(&THREAD->udebug.lock); |
132 | ASSERT(THREAD->udebug.stoppable == false); |
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3018 | svoboda | 133 | THREAD->udebug.stoppable = true; |
3026 | svoboda | 134 | mutex_unlock(&THREAD->udebug.lock); |
2898 | svoboda | 135 | |
3014 | svoboda | 136 | TASK->udebug.dt_state = UDEBUG_TS_ACTIVE; |
137 | TASK->udebug.begin_call = NULL; |
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3016 | svoboda | 138 | mutex_unlock(&TASK->udebug.lock); |
2804 | svoboda | 139 | |
140 | IPC_SET_RETVAL(db_call->data, 0); |
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2913 | svoboda | 141 | //klog_printf("udebug_stoppable_begin/ipc_answer"); |
2804 | svoboda | 142 | ipc_answer(&TASK->answerbox, db_call); |
2898 | svoboda | 143 | |
3014 | svoboda | 144 | } else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
2898 | svoboda | 145 | /* |
146 | * Active debugging session |
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147 | */ |
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148 | |||
3018 | svoboda | 149 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
3026 | svoboda | 150 | mutex_lock(&THREAD->udebug.lock); |
151 | ASSERT(THREAD->udebug.stoppable == false); |
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3018 | svoboda | 152 | THREAD->udebug.stoppable = true; |
2898 | svoboda | 153 | |
3018 | svoboda | 154 | if (THREAD->udebug.debug_active && THREAD->udebug.stop) { |
2898 | svoboda | 155 | /* |
156 | * Thread was requested to stop - answer go call |
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157 | */ |
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158 | |||
159 | /* Make sure nobody takes this call away from us */ |
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3018 | svoboda | 160 | go_call = THREAD->udebug.go_call; |
161 | THREAD->udebug.go_call = NULL; |
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2902 | svoboda | 162 | ASSERT(go_call); |
2898 | svoboda | 163 | |
164 | IPC_SET_RETVAL(go_call->data, 0); |
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165 | IPC_SET_ARG1(go_call->data, UDEBUG_EVENT_STOP); |
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166 | |||
3018 | svoboda | 167 | THREAD->udebug.cur_event = UDEBUG_EVENT_STOP; |
3026 | svoboda | 168 | mutex_unlock(&THREAD->udebug.lock); |
2898 | svoboda | 169 | |
170 | ipc_answer(&TASK->answerbox, go_call); |
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171 | |||
3016 | svoboda | 172 | mutex_unlock(&TASK->udebug.lock); |
2898 | svoboda | 173 | } else { |
174 | /* |
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175 | * No stop request - nothing happens. |
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176 | */ |
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3026 | svoboda | 177 | mutex_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 178 | mutex_unlock(&TASK->udebug.lock); |
2898 | svoboda | 179 | } |
2804 | svoboda | 180 | } else { |
2898 | svoboda | 181 | /* |
182 | * All other cases - nothing special happens. |
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183 | */ |
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184 | |||
3018 | svoboda | 185 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
3026 | svoboda | 186 | mutex_lock(&THREAD->udebug.lock); |
187 | ASSERT(THREAD->udebug.stoppable == false); |
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3018 | svoboda | 188 | THREAD->udebug.stoppable = true; |
3026 | svoboda | 189 | mutex_unlock(&THREAD->udebug.lock); |
2898 | svoboda | 190 | |
3016 | svoboda | 191 | mutex_unlock(&TASK->udebug.lock); |
2804 | svoboda | 192 | } |
193 | } |
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194 | |||
195 | void udebug_stoppable_end(void) |
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196 | { |
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197 | restart: |
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3016 | svoboda | 198 | mutex_lock(&TASK->udebug.lock); |
199 | |||
3018 | svoboda | 200 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
3026 | svoboda | 201 | mutex_lock(&THREAD->udebug.lock); |
2898 | svoboda | 202 | |
3014 | svoboda | 203 | if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
2913 | svoboda | 204 | //klog_printf("udebug_stoppable_end"); |
3018 | svoboda | 205 | //klog_printf("udebug.stop=%d", THREAD->udebug.stop); |
2898 | svoboda | 206 | } |
207 | |||
3018 | svoboda | 208 | if (THREAD->udebug.debug_active && |
209 | THREAD->udebug.stop == true) { |
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3014 | svoboda | 210 | TASK->udebug.begin_call = NULL; |
3026 | svoboda | 211 | mutex_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 212 | mutex_unlock(&TASK->udebug.lock); |
2823 | svoboda | 213 | |
3018 | svoboda | 214 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
2917 | svoboda | 215 | |
2804 | svoboda | 216 | goto restart; |
217 | /* must try again - have to lose stoppability atomically */ |
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218 | } else { |
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3014 | svoboda | 219 | ++TASK->udebug.not_stoppable_count; |
3026 | svoboda | 220 | ASSERT(THREAD->udebug.stoppable == true); |
3018 | svoboda | 221 | THREAD->udebug.stoppable = false; |
2898 | svoboda | 222 | |
3026 | svoboda | 223 | mutex_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 224 | mutex_unlock(&TASK->udebug.lock); |
2801 | svoboda | 225 | } |
3026 | svoboda | 226 | |
227 | udebug_int_unlock(); |
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2801 | svoboda | 228 | } |
229 | |||
3015 | svoboda | 230 | /** Upon being scheduled to run, check if the current thread should stop. |
231 | * |
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232 | * This function is called from clock(). Preemption is enabled. |
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233 | * interrupts are disabled, but since this is called after |
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234 | * being scheduled-in, we can enable them, if we're careful enough |
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3026 | svoboda | 235 | * not to allow arbitrary recursion or deadlock with the thread context. |
3015 | svoboda | 236 | */ |
237 | void udebug_before_thread_runs(void) |
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238 | { |
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239 | ipl_t ipl; |
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240 | |||
3026 | svoboda | 241 | ASSERT(!PREEMPTION_DISABLED); |
242 | |||
243 | /* |
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244 | * Prevent agains re-entering, such as when preempted inside this |
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245 | * function. |
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246 | */ |
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247 | if (atomic_get(&THREAD->udebug.int_lock) != 0) |
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3015 | svoboda | 248 | return; |
249 | |||
3026 | svoboda | 250 | udebug_int_lock(); |
251 | |||
3015 | svoboda | 252 | ipl = interrupts_enable(); |
253 | |||
3016 | svoboda | 254 | /* Now we're free to do whatever we need (lock mutexes, sleep, etc.) */ |
3015 | svoboda | 255 | |
256 | /* Check if we're supposed to stop */ |
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257 | udebug_stoppable_begin(); |
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258 | udebug_stoppable_end(); |
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259 | |||
260 | interrupts_restore(ipl); |
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3026 | svoboda | 261 | |
262 | udebug_int_unlock(); |
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3015 | svoboda | 263 | } |
264 | |||
2805 | svoboda | 265 | void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3, |
2901 | svoboda | 266 | unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc, |
267 | bool end_variant) |
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2801 | svoboda | 268 | { |
2805 | svoboda | 269 | call_t *call; |
2901 | svoboda | 270 | udebug_event_t etype; |
2805 | svoboda | 271 | |
2901 | svoboda | 272 | etype = end_variant ? UDEBUG_EVENT_SYSCALL_E : UDEBUG_EVENT_SYSCALL_B; |
273 | |||
3026 | svoboda | 274 | udebug_int_lock(); |
275 | |||
3016 | svoboda | 276 | mutex_lock(&TASK->udebug.lock); |
3026 | svoboda | 277 | mutex_lock(&THREAD->udebug.lock); |
3016 | svoboda | 278 | |
2854 | svoboda | 279 | /* Must only generate events when in debugging session and have go */ |
3018 | svoboda | 280 | if (THREAD->udebug.debug_active != true || |
281 | THREAD->udebug.stop == true || |
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3014 | svoboda | 282 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
3026 | svoboda | 283 | mutex_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 284 | mutex_unlock(&TASK->udebug.lock); |
2867 | svoboda | 285 | return; |
286 | } |
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2804 | svoboda | 287 | |
2913 | svoboda | 288 | //klog_printf("udebug_syscall_event"); |
3018 | svoboda | 289 | call = THREAD->udebug.go_call; |
290 | THREAD->udebug.go_call = NULL; |
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3016 | svoboda | 291 | |
2867 | svoboda | 292 | IPC_SET_RETVAL(call->data, 0); |
2901 | svoboda | 293 | IPC_SET_ARG1(call->data, etype); |
2867 | svoboda | 294 | IPC_SET_ARG2(call->data, id); |
295 | IPC_SET_ARG3(call->data, rc); |
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2913 | svoboda | 296 | //klog_printf("udebug_syscall_event/ipc_answer"); |
2805 | svoboda | 297 | |
3018 | svoboda | 298 | THREAD->udebug.syscall_args[0] = a1; |
299 | THREAD->udebug.syscall_args[1] = a2; |
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300 | THREAD->udebug.syscall_args[2] = a3; |
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301 | THREAD->udebug.syscall_args[3] = a4; |
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302 | THREAD->udebug.syscall_args[4] = a5; |
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303 | THREAD->udebug.syscall_args[5] = a6; |
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2866 | svoboda | 304 | |
2867 | svoboda | 305 | /* |
3018 | svoboda | 306 | * Make sure udebug.stop is true when going to sleep |
2867 | svoboda | 307 | * in case we get woken up by DEBUG_END. (At which |
308 | * point it must be back to the initial true value). |
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309 | */ |
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3018 | svoboda | 310 | THREAD->udebug.stop = true; |
2825 | svoboda | 311 | |
3018 | svoboda | 312 | THREAD->udebug.cur_event = etype; |
3026 | svoboda | 313 | mutex_unlock(&THREAD->udebug.lock); |
2867 | svoboda | 314 | |
3016 | svoboda | 315 | ipc_answer(&TASK->answerbox, call); |
316 | |||
317 | mutex_unlock(&TASK->udebug.lock); |
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318 | |||
3018 | svoboda | 319 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
3026 | svoboda | 320 | |
321 | udebug_int_unlock(); |
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2867 | svoboda | 322 | } |
323 | |||
2903 | svoboda | 324 | void udebug_thread_b_event(struct thread *t) |
2867 | svoboda | 325 | { |
326 | call_t *call; |
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327 | |||
3026 | svoboda | 328 | udebug_int_lock(); |
329 | |||
3016 | svoboda | 330 | mutex_lock(&TASK->udebug.lock); |
3026 | svoboda | 331 | mutex_lock(&THREAD->udebug.lock); |
3016 | svoboda | 332 | |
2903 | svoboda | 333 | klog_printf("udebug_thread_b_event"); |
2867 | svoboda | 334 | klog_printf("- check state"); |
335 | |||
336 | /* Must only generate events when in debugging session */ |
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3018 | svoboda | 337 | if (THREAD->udebug.debug_active != true) { |
338 | klog_printf("- debug_active: %s, udebug.stop: %s", |
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339 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
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340 | THREAD->udebug.stop ? "yes(-)" : "no(+)"); |
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3026 | svoboda | 341 | mutex_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 342 | mutex_unlock(&TASK->udebug.lock); |
2867 | svoboda | 343 | return; |
2801 | svoboda | 344 | } |
2867 | svoboda | 345 | |
346 | klog_printf("- trigger event"); |
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347 | |||
3018 | svoboda | 348 | call = THREAD->udebug.go_call; |
349 | THREAD->udebug.go_call = NULL; |
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2867 | svoboda | 350 | IPC_SET_RETVAL(call->data, 0); |
2903 | svoboda | 351 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B); |
2867 | svoboda | 352 | IPC_SET_ARG2(call->data, (unative_t)t); |
353 | |||
354 | /* |
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3018 | svoboda | 355 | * Make sure udebug.stop is true when going to sleep |
2867 | svoboda | 356 | * in case we get woken up by DEBUG_END. (At which |
357 | * point it must be back to the initial true value). |
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358 | */ |
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3018 | svoboda | 359 | THREAD->udebug.stop = true; |
2867 | svoboda | 360 | |
3018 | svoboda | 361 | THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B; |
3026 | svoboda | 362 | mutex_unlock(&THREAD->udebug.lock); |
2867 | svoboda | 363 | |
3016 | svoboda | 364 | ipc_answer(&TASK->answerbox, call); |
2867 | svoboda | 365 | |
3016 | svoboda | 366 | mutex_unlock(&TASK->udebug.lock); |
367 | |||
2867 | svoboda | 368 | klog_printf("- sleep"); |
3018 | svoboda | 369 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
3026 | svoboda | 370 | |
371 | udebug_int_unlock(); |
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2801 | svoboda | 372 | } |
373 | |||
2903 | svoboda | 374 | void udebug_thread_e_event(void) |
375 | { |
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376 | call_t *call; |
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377 | |||
3026 | svoboda | 378 | udebug_int_lock(); |
379 | |||
3016 | svoboda | 380 | mutex_lock(&TASK->udebug.lock); |
3026 | svoboda | 381 | mutex_lock(&THREAD->udebug.lock); |
3016 | svoboda | 382 | |
2903 | svoboda | 383 | klog_printf("udebug_thread_e_event"); |
384 | klog_printf("- check state"); |
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385 | |||
386 | /* Must only generate events when in debugging session */ |
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3018 | svoboda | 387 | if (THREAD->udebug.debug_active != true) { |
388 | klog_printf("- debug_active: %s, udebug.stop: %s", |
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389 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
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390 | THREAD->udebug.stop ? "yes(-)" : "no(+)"); |
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3026 | svoboda | 391 | mutex_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 392 | mutex_unlock(&TASK->udebug.lock); |
2903 | svoboda | 393 | return; |
394 | } |
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395 | |||
396 | klog_printf("- trigger event"); |
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397 | |||
3018 | svoboda | 398 | call = THREAD->udebug.go_call; |
399 | THREAD->udebug.go_call = NULL; |
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2903 | svoboda | 400 | IPC_SET_RETVAL(call->data, 0); |
401 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E); |
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402 | |||
2908 | svoboda | 403 | /* Prevent any further debug activity in thread */ |
3018 | svoboda | 404 | THREAD->udebug.debug_active = false; |
405 | THREAD->udebug.cur_event = 0; /* none */ |
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406 | THREAD->udebug.stop = true; /* set to initial value */ |
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3016 | svoboda | 407 | |
3026 | svoboda | 408 | mutex_unlock(&THREAD->udebug.lock); |
2903 | svoboda | 409 | |
3016 | svoboda | 410 | ipc_answer(&TASK->answerbox, call); |
2903 | svoboda | 411 | |
3016 | svoboda | 412 | mutex_unlock(&TASK->udebug.lock); |
2903 | svoboda | 413 | |
3026 | svoboda | 414 | /* Leave int_lock enabled */ |
2908 | svoboda | 415 | /* This event does not sleep - debugging has finished in this thread */ |
2903 | svoboda | 416 | } |
417 | |||
2921 | svoboda | 418 | static void breakpoint_trap_event(uintptr_t addr, udebug_event_t etype) |
2918 | svoboda | 419 | { |
420 | call_t *call; |
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2903 | svoboda | 421 | |
3026 | svoboda | 422 | udebug_int_lock(); |
423 | |||
3016 | svoboda | 424 | mutex_lock(&TASK->udebug.lock); |
3026 | svoboda | 425 | mutex_lock(&THREAD->udebug.lock); |
3016 | svoboda | 426 | |
2918 | svoboda | 427 | /* Must only generate events when in debugging session and have go */ |
3018 | svoboda | 428 | if (THREAD->udebug.debug_active != true || |
429 | THREAD->udebug.stop == true || |
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3014 | svoboda | 430 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
3026 | svoboda | 431 | mutex_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 432 | mutex_unlock(&TASK->udebug.lock); |
2918 | svoboda | 433 | return; |
434 | } |
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435 | |||
2921 | svoboda | 436 | klog_printf("udebug_breakpoint/trap_event"); |
3018 | svoboda | 437 | call = THREAD->udebug.go_call; |
438 | THREAD->udebug.go_call = NULL; |
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3016 | svoboda | 439 | |
2918 | svoboda | 440 | IPC_SET_RETVAL(call->data, 0); |
441 | IPC_SET_ARG1(call->data, etype); |
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442 | IPC_SET_ARG2(call->data, addr); |
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443 | |||
444 | /* |
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3018 | svoboda | 445 | * Make sure udebug.stop is true when going to sleep |
2918 | svoboda | 446 | * in case we get woken up by DEBUG_END. (At which |
447 | * point it must be back to the initial true value). |
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448 | */ |
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3018 | svoboda | 449 | THREAD->udebug.stop = true; |
2918 | svoboda | 450 | |
3018 | svoboda | 451 | THREAD->udebug.cur_event = etype; |
3026 | svoboda | 452 | mutex_unlock(&THREAD->udebug.lock); |
453 | |||
2918 | svoboda | 454 | klog_printf("- send answer"); |
455 | |||
3016 | svoboda | 456 | ipc_answer(&TASK->answerbox, call); |
457 | mutex_unlock(&TASK->udebug.lock); |
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2918 | svoboda | 458 | |
3018 | svoboda | 459 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
3026 | svoboda | 460 | |
461 | udebug_int_unlock(); |
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2918 | svoboda | 462 | } |
463 | |||
2921 | svoboda | 464 | void udebug_breakpoint_event(uintptr_t addr) |
465 | { |
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466 | breakpoint_trap_event(addr, UDEBUG_EVENT_BREAKPOINT); |
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467 | } |
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2918 | svoboda | 468 | |
2921 | svoboda | 469 | void udebug_trap_event(uintptr_t addr) |
470 | { |
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471 | breakpoint_trap_event(addr, UDEBUG_EVENT_TRAP); |
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472 | } |
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473 | |||
2870 | svoboda | 474 | /** |
475 | * Terminate task debugging session. |
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476 | * |
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3016 | svoboda | 477 | * \param ta->udebug.lock must be already locked. |
2870 | svoboda | 478 | * \return Zero on success or negative error code. |
479 | */ |
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480 | int udebug_task_cleanup(struct task *ta) |
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481 | { |
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482 | thread_t *t; |
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483 | link_t *cur; |
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484 | int flags; |
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3016 | svoboda | 485 | ipl_t ipl; |
2867 | svoboda | 486 | |
2870 | svoboda | 487 | klog_printf("udebug_task_cleanup()"); |
488 | klog_printf("task %llu", ta->taskid); |
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489 | |||
3026 | svoboda | 490 | udebug_int_lock(); |
491 | |||
3014 | svoboda | 492 | if (ta->udebug.dt_state == UDEBUG_TS_BEGINNING && |
493 | ta->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
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2870 | svoboda | 494 | klog_printf("udebug_task_cleanup(): task not being debugged"); |
495 | return EINVAL; |
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496 | } |
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497 | |||
498 | /* Finish debugging of all userspace threads */ |
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499 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
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500 | t = list_get_instance(cur, thread_t, th_link); |
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501 | |||
3026 | svoboda | 502 | mutex_lock(&t->udebug.lock); |
503 | |||
3016 | svoboda | 504 | ipl = interrupts_disable(); |
2870 | svoboda | 505 | spinlock_lock(&t->lock); |
506 | |||
507 | flags = t->flags; |
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508 | |||
509 | spinlock_unlock(&t->lock); |
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3026 | svoboda | 510 | interrupts_restore(ipl); |
2870 | svoboda | 511 | |
512 | /* Only process userspace threads */ |
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513 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
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514 | /* Prevent any further debug activity in thread */ |
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3018 | svoboda | 515 | t->udebug.debug_active = false; |
516 | t->udebug.cur_event = 0; /* none */ |
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2870 | svoboda | 517 | |
518 | /* Still has go? */ |
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3018 | svoboda | 519 | if (t->udebug.stop == false) { |
2870 | svoboda | 520 | /* |
521 | * Yes, so clear go. As debug_active == false, |
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522 | * this doesn't affect anything. |
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523 | */ |
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3018 | svoboda | 524 | t->udebug.stop = true; |
2870 | svoboda | 525 | |
526 | /* Answer GO call */ |
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527 | klog_printf("answer GO call with EVENT_FINISHED"); |
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3018 | svoboda | 528 | IPC_SET_RETVAL(t->udebug.go_call->data, 0); |
529 | IPC_SET_ARG1(t->udebug.go_call->data, UDEBUG_EVENT_FINISHED); |
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3026 | svoboda | 530 | |
3018 | svoboda | 531 | ipc_answer(&ta->answerbox, t->udebug.go_call); |
532 | t->udebug.go_call = NULL; |
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2870 | svoboda | 533 | } else { |
534 | /* |
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535 | * Debug_stop is already at initial value. |
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536 | * Yet this means the thread needs waking up. |
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537 | */ |
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538 | |||
539 | /* |
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540 | * t's lock must not be held when calling |
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541 | * waitq_wakeup. |
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542 | */ |
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3018 | svoboda | 543 | waitq_wakeup(&t->udebug.go_wq, WAKEUP_FIRST); |
2870 | svoboda | 544 | } |
545 | } |
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3026 | svoboda | 546 | mutex_unlock(&t->udebug.lock); |
2870 | svoboda | 547 | } |
548 | |||
3014 | svoboda | 549 | ta->udebug.dt_state = UDEBUG_TS_INACTIVE; |
550 | ta->udebug.debugger = NULL; |
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2870 | svoboda | 551 | |
3026 | svoboda | 552 | udebug_int_unlock(); |
553 | |||
2870 | svoboda | 554 | return 0; |
555 | } |
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556 | |||
557 | |||
2801 | svoboda | 558 | /** @} |
559 | */ |