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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 | |||
3014 | svoboda | 44 | void udebug_task_init(udebug_task_t *ut) |
45 | { |
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3016 | svoboda | 46 | mutex_initialize(&ut->lock); |
3014 | svoboda | 47 | ut->dt_state = UDEBUG_TS_INACTIVE; |
48 | ut->begin_call = NULL; |
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49 | ut->not_stoppable_count = 0; |
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50 | ut->evmask = 0; |
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51 | } |
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52 | |||
3018 | svoboda | 53 | void udebug_thread_initialize(udebug_thread_t *ut) |
54 | { |
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55 | waitq_initialize(&ut->go_wq); |
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56 | ut->go_call = NULL; |
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57 | ut->uspace_state = NULL; |
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58 | ut->stop = true; |
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59 | ut->stoppable = true; |
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60 | ut->debug_active = false; |
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61 | ut->cur_event = 0; /* none */ |
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62 | } |
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63 | |||
2917 | svoboda | 64 | static void udebug_wait_for_go(waitq_t *wq) |
65 | { |
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66 | int rc; |
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67 | ipl_t ipl; |
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68 | |||
69 | ipl = waitq_sleep_prepare(wq); |
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70 | |||
71 | wq->missed_wakeups = 0; /* Enforce blocking. */ |
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72 | rc = waitq_sleep_timeout_unsafe(wq, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE); |
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73 | |||
74 | waitq_sleep_finish(wq, rc, ipl); |
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75 | } |
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76 | |||
2804 | svoboda | 77 | void udebug_stoppable_begin(void) |
2801 | svoboda | 78 | { |
2804 | svoboda | 79 | int nsc; |
2898 | svoboda | 80 | call_t *db_call, *go_call; |
2823 | svoboda | 81 | ipl_t ipl; |
2804 | svoboda | 82 | |
2902 | svoboda | 83 | ASSERT(THREAD); |
84 | ASSERT(TASK); |
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85 | |||
3016 | svoboda | 86 | mutex_lock(&TASK->udebug.lock); |
2804 | svoboda | 87 | |
3014 | svoboda | 88 | nsc = --TASK->udebug.not_stoppable_count; |
2804 | svoboda | 89 | |
3014 | svoboda | 90 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING) { |
2804 | svoboda | 91 | klog_printf("udebug_stoppable_begin"); |
92 | klog_printf(" - nsc := %d", nsc); |
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93 | } |
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94 | |||
3014 | svoboda | 95 | if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING && nsc == 0) { |
2898 | svoboda | 96 | /* |
97 | * This was the last non-stoppable thread. Reply to |
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98 | * DEBUG_BEGIN call. |
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99 | */ |
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100 | |||
3014 | svoboda | 101 | db_call = TASK->udebug.begin_call; |
2902 | svoboda | 102 | ASSERT(db_call); |
103 | |||
3018 | svoboda | 104 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
3016 | svoboda | 105 | ipl = interrupts_disable(); |
3018 | svoboda | 106 | spinlock_lock(&THREAD->udebug.lock); |
107 | THREAD->udebug.stoppable = true; |
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108 | spinlock_unlock(&THREAD->udebug.lock); |
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3016 | svoboda | 109 | interrupts_restore(ipl); |
2898 | svoboda | 110 | |
3014 | svoboda | 111 | TASK->udebug.dt_state = UDEBUG_TS_ACTIVE; |
112 | TASK->udebug.begin_call = NULL; |
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3016 | svoboda | 113 | mutex_unlock(&TASK->udebug.lock); |
2804 | svoboda | 114 | |
115 | IPC_SET_RETVAL(db_call->data, 0); |
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2913 | svoboda | 116 | //klog_printf("udebug_stoppable_begin/ipc_answer"); |
2804 | svoboda | 117 | ipc_answer(&TASK->answerbox, db_call); |
2898 | svoboda | 118 | |
3014 | svoboda | 119 | } else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
2898 | svoboda | 120 | /* |
121 | * Active debugging session |
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122 | */ |
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123 | |||
3018 | svoboda | 124 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
3016 | svoboda | 125 | ipl = interrupts_disable(); |
3018 | svoboda | 126 | spinlock_lock(&THREAD->udebug.lock); |
127 | THREAD->udebug.stoppable = true; |
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2898 | svoboda | 128 | |
3018 | svoboda | 129 | if (THREAD->udebug.debug_active && THREAD->udebug.stop) { |
2898 | svoboda | 130 | /* |
131 | * Thread was requested to stop - answer go call |
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132 | */ |
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133 | |||
134 | /* Make sure nobody takes this call away from us */ |
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3018 | svoboda | 135 | go_call = THREAD->udebug.go_call; |
136 | THREAD->udebug.go_call = NULL; |
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2902 | svoboda | 137 | ASSERT(go_call); |
2898 | svoboda | 138 | |
139 | IPC_SET_RETVAL(go_call->data, 0); |
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140 | IPC_SET_ARG1(go_call->data, UDEBUG_EVENT_STOP); |
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141 | |||
3018 | svoboda | 142 | THREAD->udebug.cur_event = UDEBUG_EVENT_STOP; |
143 | spinlock_unlock(&THREAD->udebug.lock); |
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3016 | svoboda | 144 | interrupts_restore(ipl); |
2898 | svoboda | 145 | |
146 | ipc_answer(&TASK->answerbox, go_call); |
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147 | |||
3016 | svoboda | 148 | mutex_unlock(&TASK->udebug.lock); |
2898 | svoboda | 149 | } else { |
150 | /* |
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151 | * No stop request - nothing happens. |
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152 | */ |
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3018 | svoboda | 153 | spinlock_unlock(&THREAD->udebug.lock); |
2898 | svoboda | 154 | interrupts_restore(ipl); |
3016 | svoboda | 155 | mutex_unlock(&TASK->udebug.lock); |
2898 | svoboda | 156 | } |
2804 | svoboda | 157 | } else { |
2898 | svoboda | 158 | /* |
159 | * All other cases - nothing special happens. |
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160 | */ |
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161 | |||
3018 | svoboda | 162 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
3016 | svoboda | 163 | ipl = interrupts_disable(); |
3018 | svoboda | 164 | spinlock_lock(&THREAD->udebug.lock); |
165 | THREAD->udebug.stoppable = true; |
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166 | spinlock_unlock(&THREAD->udebug.lock); |
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3016 | svoboda | 167 | interrupts_restore(ipl); |
2898 | svoboda | 168 | |
3016 | svoboda | 169 | mutex_unlock(&TASK->udebug.lock); |
2804 | svoboda | 170 | } |
171 | } |
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172 | |||
173 | void udebug_stoppable_end(void) |
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174 | { |
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2823 | svoboda | 175 | ipl_t ipl; |
176 | |||
2804 | svoboda | 177 | restart: |
3016 | svoboda | 178 | mutex_lock(&TASK->udebug.lock); |
179 | |||
3018 | svoboda | 180 | /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */ |
2823 | svoboda | 181 | ipl = interrupts_disable(); |
3018 | svoboda | 182 | spinlock_lock(&THREAD->udebug.lock); |
2898 | svoboda | 183 | |
3014 | svoboda | 184 | if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) { |
2913 | svoboda | 185 | //klog_printf("udebug_stoppable_end"); |
3018 | svoboda | 186 | //klog_printf("udebug.stop=%d", THREAD->udebug.stop); |
2898 | svoboda | 187 | } |
188 | |||
3018 | svoboda | 189 | if (THREAD->udebug.debug_active && |
190 | THREAD->udebug.stop == true) { |
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3014 | svoboda | 191 | TASK->udebug.begin_call = NULL; |
3018 | svoboda | 192 | spinlock_unlock(&THREAD->udebug.lock); |
2823 | svoboda | 193 | interrupts_restore(ipl); |
3016 | svoboda | 194 | mutex_unlock(&TASK->udebug.lock); |
2823 | svoboda | 195 | |
3018 | svoboda | 196 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
2917 | svoboda | 197 | |
2804 | svoboda | 198 | goto restart; |
199 | /* must try again - have to lose stoppability atomically */ |
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200 | } else { |
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3014 | svoboda | 201 | ++TASK->udebug.not_stoppable_count; |
3018 | svoboda | 202 | THREAD->udebug.stoppable = false; |
2898 | svoboda | 203 | |
3018 | svoboda | 204 | spinlock_unlock(&THREAD->udebug.lock); |
2823 | svoboda | 205 | interrupts_restore(ipl); |
3016 | svoboda | 206 | mutex_unlock(&TASK->udebug.lock); |
2801 | svoboda | 207 | } |
208 | } |
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209 | |||
3015 | svoboda | 210 | /** Upon being scheduled to run, check if the current thread should stop. |
211 | * |
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212 | * This function is called from clock(). Preemption is enabled. |
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213 | * interrupts are disabled, but since this is called after |
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214 | * being scheduled-in, we can enable them, if we're careful enough |
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215 | * not to allow arbitrary recursion. |
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216 | */ |
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217 | void udebug_before_thread_runs(void) |
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218 | { |
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219 | ipl_t ipl; |
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220 | |||
221 | /* This will happen if we get preempted inside this function. */ |
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3018 | svoboda | 222 | if (THREAD->udebug.in_before_thread_runs) |
3015 | svoboda | 223 | return; |
224 | |||
3018 | svoboda | 225 | THREAD->udebug.in_before_thread_runs = true; |
3015 | svoboda | 226 | ipl = interrupts_enable(); |
227 | |||
3016 | svoboda | 228 | /* Now we're free to do whatever we need (lock mutexes, sleep, etc.) */ |
3015 | svoboda | 229 | |
230 | /* Check if we're supposed to stop */ |
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231 | udebug_stoppable_begin(); |
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232 | udebug_stoppable_end(); |
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233 | |||
234 | interrupts_restore(ipl); |
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3018 | svoboda | 235 | THREAD->udebug.in_before_thread_runs = false; |
3015 | svoboda | 236 | } |
237 | |||
2805 | svoboda | 238 | void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3, |
2901 | svoboda | 239 | unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc, |
240 | bool end_variant) |
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2801 | svoboda | 241 | { |
2805 | svoboda | 242 | call_t *call; |
2823 | svoboda | 243 | ipl_t ipl; |
2901 | svoboda | 244 | udebug_event_t etype; |
2805 | svoboda | 245 | |
2901 | svoboda | 246 | etype = end_variant ? UDEBUG_EVENT_SYSCALL_E : UDEBUG_EVENT_SYSCALL_B; |
247 | |||
3016 | svoboda | 248 | mutex_lock(&TASK->udebug.lock); |
249 | |||
2823 | svoboda | 250 | ipl = interrupts_disable(); |
3018 | svoboda | 251 | spinlock_lock(&THREAD->udebug.lock); |
2823 | svoboda | 252 | |
2854 | svoboda | 253 | /* Must only generate events when in debugging session and have go */ |
3018 | svoboda | 254 | if (THREAD->udebug.debug_active != true || |
255 | THREAD->udebug.stop == true || |
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3014 | svoboda | 256 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
3018 | svoboda | 257 | spinlock_unlock(&THREAD->udebug.lock); |
2867 | svoboda | 258 | interrupts_restore(ipl); |
3016 | svoboda | 259 | mutex_unlock(&TASK->udebug.lock); |
2867 | svoboda | 260 | return; |
261 | } |
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2804 | svoboda | 262 | |
2913 | svoboda | 263 | //klog_printf("udebug_syscall_event"); |
3018 | svoboda | 264 | call = THREAD->udebug.go_call; |
265 | THREAD->udebug.go_call = NULL; |
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3016 | svoboda | 266 | |
2867 | svoboda | 267 | IPC_SET_RETVAL(call->data, 0); |
2901 | svoboda | 268 | IPC_SET_ARG1(call->data, etype); |
2867 | svoboda | 269 | IPC_SET_ARG2(call->data, id); |
270 | IPC_SET_ARG3(call->data, rc); |
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2913 | svoboda | 271 | //klog_printf("udebug_syscall_event/ipc_answer"); |
2805 | svoboda | 272 | |
3018 | svoboda | 273 | THREAD->udebug.syscall_args[0] = a1; |
274 | THREAD->udebug.syscall_args[1] = a2; |
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275 | THREAD->udebug.syscall_args[2] = a3; |
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276 | THREAD->udebug.syscall_args[3] = a4; |
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277 | THREAD->udebug.syscall_args[4] = a5; |
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278 | THREAD->udebug.syscall_args[5] = a6; |
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2866 | svoboda | 279 | |
2867 | svoboda | 280 | /* |
3018 | svoboda | 281 | * Make sure udebug.stop is true when going to sleep |
2867 | svoboda | 282 | * in case we get woken up by DEBUG_END. (At which |
283 | * point it must be back to the initial true value). |
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284 | */ |
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3018 | svoboda | 285 | THREAD->udebug.stop = true; |
2825 | svoboda | 286 | |
3018 | svoboda | 287 | THREAD->udebug.cur_event = etype; |
288 | spinlock_unlock(&THREAD->udebug.lock); |
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2867 | svoboda | 289 | interrupts_restore(ipl); |
290 | |||
3016 | svoboda | 291 | ipc_answer(&TASK->answerbox, call); |
292 | |||
293 | mutex_unlock(&TASK->udebug.lock); |
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294 | |||
3018 | svoboda | 295 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
2867 | svoboda | 296 | } |
297 | |||
2903 | svoboda | 298 | void udebug_thread_b_event(struct thread *t) |
2867 | svoboda | 299 | { |
300 | call_t *call; |
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301 | ipl_t ipl; |
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302 | |||
3016 | svoboda | 303 | mutex_lock(&TASK->udebug.lock); |
304 | |||
2867 | svoboda | 305 | ipl = interrupts_disable(); |
3018 | svoboda | 306 | spinlock_lock(&THREAD->udebug.lock); |
2867 | svoboda | 307 | |
2903 | svoboda | 308 | klog_printf("udebug_thread_b_event"); |
2867 | svoboda | 309 | klog_printf("- check state"); |
310 | |||
311 | /* Must only generate events when in debugging session */ |
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3018 | svoboda | 312 | if (THREAD->udebug.debug_active != true) { |
313 | klog_printf("- debug_active: %s, udebug.stop: %s", |
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314 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
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315 | THREAD->udebug.stop ? "yes(-)" : "no(+)"); |
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316 | spinlock_unlock(&THREAD->udebug.lock); |
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2823 | svoboda | 317 | interrupts_restore(ipl); |
3016 | svoboda | 318 | mutex_unlock(&TASK->udebug.lock); |
2867 | svoboda | 319 | return; |
2801 | svoboda | 320 | } |
2867 | svoboda | 321 | |
322 | klog_printf("- trigger event"); |
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323 | |||
3018 | svoboda | 324 | call = THREAD->udebug.go_call; |
325 | THREAD->udebug.go_call = NULL; |
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2867 | svoboda | 326 | IPC_SET_RETVAL(call->data, 0); |
2903 | svoboda | 327 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B); |
2867 | svoboda | 328 | IPC_SET_ARG2(call->data, (unative_t)t); |
329 | |||
330 | /* |
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3018 | svoboda | 331 | * Make sure udebug.stop is true when going to sleep |
2867 | svoboda | 332 | * in case we get woken up by DEBUG_END. (At which |
333 | * point it must be back to the initial true value). |
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334 | */ |
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3018 | svoboda | 335 | THREAD->udebug.stop = true; |
2867 | svoboda | 336 | |
3018 | svoboda | 337 | THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B; |
338 | spinlock_unlock(&THREAD->udebug.lock); |
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3016 | svoboda | 339 | interrupts_restore(ipl); |
2867 | svoboda | 340 | |
3016 | svoboda | 341 | ipc_answer(&TASK->answerbox, call); |
2867 | svoboda | 342 | |
3016 | svoboda | 343 | mutex_unlock(&TASK->udebug.lock); |
344 | |||
2867 | svoboda | 345 | klog_printf("- sleep"); |
3018 | svoboda | 346 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
2801 | svoboda | 347 | } |
348 | |||
2903 | svoboda | 349 | void udebug_thread_e_event(void) |
350 | { |
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351 | call_t *call; |
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352 | ipl_t ipl; |
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353 | |||
3016 | svoboda | 354 | mutex_lock(&TASK->udebug.lock); |
355 | |||
2903 | svoboda | 356 | ipl = interrupts_disable(); |
3018 | svoboda | 357 | spinlock_lock(&THREAD->udebug.lock); |
2903 | svoboda | 358 | |
359 | klog_printf("udebug_thread_e_event"); |
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360 | klog_printf("- check state"); |
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361 | |||
362 | /* Must only generate events when in debugging session */ |
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3018 | svoboda | 363 | if (THREAD->udebug.debug_active != true) { |
364 | klog_printf("- debug_active: %s, udebug.stop: %s", |
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365 | THREAD->udebug.debug_active ? "yes(+)" : "no(-)", |
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366 | THREAD->udebug.stop ? "yes(-)" : "no(+)"); |
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367 | spinlock_unlock(&THREAD->udebug.lock); |
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2903 | svoboda | 368 | interrupts_restore(ipl); |
3016 | svoboda | 369 | mutex_unlock(&TASK->udebug.lock); |
2903 | svoboda | 370 | return; |
371 | } |
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372 | |||
373 | klog_printf("- trigger event"); |
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374 | |||
3018 | svoboda | 375 | call = THREAD->udebug.go_call; |
376 | THREAD->udebug.go_call = NULL; |
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2903 | svoboda | 377 | IPC_SET_RETVAL(call->data, 0); |
378 | IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E); |
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379 | |||
2908 | svoboda | 380 | /* Prevent any further debug activity in thread */ |
3018 | svoboda | 381 | THREAD->udebug.debug_active = false; |
382 | THREAD->udebug.cur_event = 0; /* none */ |
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383 | THREAD->udebug.stop = true; /* set to initial value */ |
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3016 | svoboda | 384 | |
3018 | svoboda | 385 | spinlock_unlock(&THREAD->udebug.lock); |
3016 | svoboda | 386 | interrupts_restore(ipl); |
2903 | svoboda | 387 | |
3016 | svoboda | 388 | ipc_answer(&TASK->answerbox, call); |
2903 | svoboda | 389 | |
3016 | svoboda | 390 | mutex_unlock(&TASK->udebug.lock); |
2903 | svoboda | 391 | |
2908 | svoboda | 392 | /* This event does not sleep - debugging has finished in this thread */ |
2903 | svoboda | 393 | } |
394 | |||
2921 | svoboda | 395 | static void breakpoint_trap_event(uintptr_t addr, udebug_event_t etype) |
2918 | svoboda | 396 | { |
397 | call_t *call; |
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398 | ipl_t ipl; |
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2903 | svoboda | 399 | |
3016 | svoboda | 400 | mutex_lock(&TASK->udebug.lock); |
401 | |||
2918 | svoboda | 402 | ipl = interrupts_disable(); |
3018 | svoboda | 403 | spinlock_lock(&THREAD->udebug.lock); |
2918 | svoboda | 404 | |
405 | /* Must only generate events when in debugging session and have go */ |
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3018 | svoboda | 406 | if (THREAD->udebug.debug_active != true || |
407 | THREAD->udebug.stop == true || |
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3014 | svoboda | 408 | (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) { |
3018 | svoboda | 409 | spinlock_unlock(&THREAD->udebug.lock); |
2918 | svoboda | 410 | interrupts_restore(ipl); |
3016 | svoboda | 411 | mutex_unlock(&TASK->udebug.lock); |
2918 | svoboda | 412 | return; |
413 | } |
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414 | |||
2921 | svoboda | 415 | klog_printf("udebug_breakpoint/trap_event"); |
3018 | svoboda | 416 | call = THREAD->udebug.go_call; |
417 | THREAD->udebug.go_call = NULL; |
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3016 | svoboda | 418 | |
2918 | svoboda | 419 | IPC_SET_RETVAL(call->data, 0); |
420 | IPC_SET_ARG1(call->data, etype); |
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421 | IPC_SET_ARG2(call->data, addr); |
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422 | |||
423 | /* |
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3018 | svoboda | 424 | * Make sure udebug.stop is true when going to sleep |
2918 | svoboda | 425 | * in case we get woken up by DEBUG_END. (At which |
426 | * point it must be back to the initial true value). |
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427 | */ |
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3018 | svoboda | 428 | THREAD->udebug.stop = true; |
2918 | svoboda | 429 | |
3018 | svoboda | 430 | THREAD->udebug.cur_event = etype; |
431 | spinlock_unlock(&THREAD->udebug.lock); |
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3016 | svoboda | 432 | interrupts_restore(ipl); |
2918 | svoboda | 433 | klog_printf("- send answer"); |
434 | |||
3016 | svoboda | 435 | ipc_answer(&TASK->answerbox, call); |
436 | mutex_unlock(&TASK->udebug.lock); |
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2918 | svoboda | 437 | |
3018 | svoboda | 438 | udebug_wait_for_go(&THREAD->udebug.go_wq); |
2918 | svoboda | 439 | } |
440 | |||
2921 | svoboda | 441 | void udebug_breakpoint_event(uintptr_t addr) |
442 | { |
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443 | breakpoint_trap_event(addr, UDEBUG_EVENT_BREAKPOINT); |
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444 | } |
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2918 | svoboda | 445 | |
2921 | svoboda | 446 | void udebug_trap_event(uintptr_t addr) |
447 | { |
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448 | breakpoint_trap_event(addr, UDEBUG_EVENT_TRAP); |
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449 | } |
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450 | |||
2870 | svoboda | 451 | /** |
452 | * Terminate task debugging session. |
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453 | * |
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3016 | svoboda | 454 | * \param ta->udebug.lock must be already locked. |
2870 | svoboda | 455 | * \return Zero on success or negative error code. |
456 | */ |
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457 | int udebug_task_cleanup(struct task *ta) |
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458 | { |
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459 | thread_t *t; |
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460 | link_t *cur; |
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461 | int flags; |
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3016 | svoboda | 462 | ipl_t ipl; |
2867 | svoboda | 463 | |
2870 | svoboda | 464 | klog_printf("udebug_task_cleanup()"); |
465 | klog_printf("task %llu", ta->taskid); |
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466 | |||
3014 | svoboda | 467 | if (ta->udebug.dt_state == UDEBUG_TS_BEGINNING && |
468 | ta->udebug.dt_state != UDEBUG_TS_ACTIVE) { |
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2870 | svoboda | 469 | klog_printf("udebug_task_cleanup(): task not being debugged"); |
470 | return EINVAL; |
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471 | } |
||
472 | |||
473 | /* Finish debugging of all userspace threads */ |
||
474 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
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475 | t = list_get_instance(cur, thread_t, th_link); |
||
476 | |||
3016 | svoboda | 477 | ipl = interrupts_disable(); |
3018 | svoboda | 478 | spinlock_lock(&t->udebug.lock); |
2870 | svoboda | 479 | spinlock_lock(&t->lock); |
480 | |||
481 | flags = t->flags; |
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482 | |||
483 | spinlock_unlock(&t->lock); |
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484 | |||
485 | /* Only process userspace threads */ |
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486 | if ((flags & THREAD_FLAG_USPACE) != 0) { |
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487 | /* Prevent any further debug activity in thread */ |
||
3018 | svoboda | 488 | t->udebug.debug_active = false; |
489 | t->udebug.cur_event = 0; /* none */ |
||
2870 | svoboda | 490 | |
491 | /* Still has go? */ |
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3018 | svoboda | 492 | if (t->udebug.stop == false) { |
2870 | svoboda | 493 | /* |
494 | * Yes, so clear go. As debug_active == false, |
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495 | * this doesn't affect anything. |
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496 | */ |
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3018 | svoboda | 497 | t->udebug.stop = true; |
2870 | svoboda | 498 | |
499 | /* Answer GO call */ |
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500 | klog_printf("answer GO call with EVENT_FINISHED"); |
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3018 | svoboda | 501 | IPC_SET_RETVAL(t->udebug.go_call->data, 0); |
502 | IPC_SET_ARG1(t->udebug.go_call->data, UDEBUG_EVENT_FINISHED); |
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3016 | svoboda | 503 | /* FIXME: must not call with interrupts disabled!!*/ |
3018 | svoboda | 504 | ipc_answer(&ta->answerbox, t->udebug.go_call); |
505 | t->udebug.go_call = NULL; |
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2870 | svoboda | 506 | } else { |
507 | /* |
||
508 | * Debug_stop is already at initial value. |
||
509 | * Yet this means the thread needs waking up. |
||
510 | */ |
||
511 | |||
512 | /* |
||
513 | * t's lock must not be held when calling |
||
514 | * waitq_wakeup. |
||
515 | */ |
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3018 | svoboda | 516 | waitq_wakeup(&t->udebug.go_wq, WAKEUP_FIRST); |
2870 | svoboda | 517 | } |
518 | } |
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3018 | svoboda | 519 | spinlock_unlock(&t->udebug.lock); |
3016 | svoboda | 520 | interrupts_restore(ipl); |
2870 | svoboda | 521 | } |
522 | |||
3014 | svoboda | 523 | ta->udebug.dt_state = UDEBUG_TS_INACTIVE; |
524 | ta->udebug.debugger = NULL; |
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2870 | svoboda | 525 | |
526 | return 0; |
||
527 | } |
||
528 | |||
529 | |||
2801 | svoboda | 530 | /** @} |
531 | */ |