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| Rev | Author | Line No. | Line |
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| 2813 | svoboda | 1 | /** @addtogroup generic |
| 2 | * @{ |
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| 3 | */ |
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| 4 | |||
| 5 | /** |
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| 6 | * @file |
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| 7 | * @brief Tdebug. |
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| 8 | */ |
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| 9 | |||
| 10 | #include <console/klog.h> |
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| 11 | #include <proc/task.h> |
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| 12 | #include <proc/thread.h> |
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| 13 | #include <errno.h> |
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| 14 | #include <ipc/ipc.h> |
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| 15 | #include <syscall/copy.h> |
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| 16 | #include <udebug/udebug.h> |
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| 17 | #include <udebug/udebug_ipc.h> |
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| 18 | |||
| 19 | static task_t *get_lock_callee_task(phone_t *phone) |
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| 20 | { |
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| 21 | answerbox_t *answerbox; |
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| 22 | task_t *ta; |
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| 23 | |||
| 24 | // FIXME: locking!!! |
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| 25 | |||
| 26 | answerbox = phone->callee; |
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| 27 | ta = answerbox->task; |
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| 28 | |||
| 29 | spinlock_lock(&ta->lock); |
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| 30 | |||
| 31 | return ta; |
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| 32 | } |
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| 33 | |||
| 34 | static thread_t *get_task_thread_by_id(task_t *ta, thread_id_t tid) |
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| 35 | { |
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| 36 | thread_t *t; |
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| 37 | link_t *cur; |
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| 38 | |||
| 39 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
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| 40 | t = list_get_instance(cur, thread_t, th_link); |
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| 41 | if (tid == t->tid) return t; |
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| 42 | } |
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| 43 | |||
| 44 | return NULL; |
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| 45 | } |
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| 46 | |||
| 47 | static int udebug_rp_begin(call_t *call, phone_t *phone) |
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| 48 | { |
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| 49 | task_t *ta; |
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| 50 | |||
| 51 | klog_printf("debug_begin()"); |
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| 52 | |||
| 53 | ta = get_lock_callee_task(phone); |
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| 54 | klog_printf("debugging task %llu", ta->taskid); |
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| 55 | |||
| 56 | if (ta->being_debugged != false) { |
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| 57 | spinlock_unlock(&ta->lock); |
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| 58 | klog_printf("debug_begin(): busy error"); |
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| 59 | return EBUSY; |
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| 60 | } |
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| 61 | |||
| 62 | ta->being_debugged = true; |
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| 63 | ta->stop_request = true; |
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| 64 | ta->debug_begin_call = call; |
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| 65 | |||
| 66 | if (ta->not_stoppable_count == 0) { |
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| 67 | ta->debug_begin_call = NULL; |
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| 68 | ta->stop_request = false; |
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| 69 | spinlock_unlock(&ta->lock); |
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| 70 | klog_printf("debug_begin(): immediate backsend"); |
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| 71 | return 1; /* actually we need backsend with 0 retval */ |
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| 72 | } |
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| 73 | |||
| 74 | spinlock_unlock(&ta->lock); |
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| 75 | |||
| 76 | klog_printf("debug_begin() done (wait for stoppability)"); |
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| 77 | return 0; |
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| 78 | } |
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| 79 | |||
| 80 | static int udebug_rp_go(call_t *call, phone_t *phone) |
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| 81 | { |
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| 82 | thread_t *t; |
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| 83 | task_t *ta; |
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| 84 | |||
| 85 | klog_printf("debug_go()"); |
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| 86 | ta = get_lock_callee_task(phone); |
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| 87 | |||
| 88 | ta->debug_go_call = call; |
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| 89 | t = get_task_thread_by_id(ta, IPC_GET_ARG2(call->data)); |
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| 90 | if (t == NULL) { |
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| 91 | spinlock_unlock(&ta->lock); |
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| 92 | return ENOENT; |
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| 93 | } |
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| 94 | |||
| 95 | klog_printf("debug_go(): waitq_wakeup"); |
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| 96 | waitq_wakeup(&t->go_wq, WAKEUP_FIRST); |
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| 97 | |||
| 98 | spinlock_unlock(&ta->lock); |
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| 99 | |||
| 100 | return 0; /* no backsend */ |
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| 101 | } |
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| 102 | |||
| 103 | static int udebug_rp_args_read(call_t *call, phone_t *phone) |
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| 104 | { |
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| 105 | thread_t *t; |
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| 106 | task_t *ta; |
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| 107 | void *uspace_buffer; |
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| 108 | unative_t to_copy; |
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| 109 | int rc; |
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| 110 | |||
| 111 | klog_printf("debug_args_read()"); |
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| 112 | // FIXME: verify task/thread state |
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| 113 | |||
| 114 | ta = get_lock_callee_task(phone); |
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| 115 | klog_printf("task %llu", ta->taskid); |
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| 116 | t = get_task_thread_by_id(ta, IPC_GET_ARG2(call->data)); |
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| 117 | if (t == NULL) { |
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| 118 | spinlock_unlock(&ta->lock); |
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| 119 | return ENOENT; |
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| 120 | } |
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| 121 | |||
| 122 | uspace_buffer = (void *)IPC_GET_ARG3(call->data); |
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| 123 | to_copy = IPC_GET_ARG4(call->data); |
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| 124 | if (to_copy > 6 * sizeof(unative_t)) to_copy = 6 * sizeof(unative_t); |
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| 125 | |||
| 126 | rc = copy_to_uspace(uspace_buffer, t->syscall_args, to_copy); |
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| 127 | if (rc != 0) { |
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| 128 | spinlock_unlock(&ta->lock); |
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| 129 | klog_printf("debug_args_read() - copy failed"); |
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| 130 | return rc; |
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| 131 | } |
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| 132 | |||
| 133 | spinlock_unlock(&ta->lock); |
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| 134 | |||
| 135 | IPC_SET_ARG1(call->data, to_copy); |
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| 136 | |||
| 137 | klog_printf("debug_args_read() done"); |
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| 138 | return 1; /* actually need becksend with retval 0 */ |
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| 139 | } |
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| 140 | |||
| 141 | static int udebug_rp_thread_read(call_t *call, phone_t *phone) |
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| 142 | { |
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| 143 | thread_t *t; |
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| 144 | link_t *cur; |
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| 145 | task_t *ta; |
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| 146 | unative_t *uspace_buffer; |
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| 147 | unative_t to_copy; |
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| 148 | int rc; |
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| 149 | unsigned copied, total; |
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| 150 | unsigned buf_size; |
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| 151 | unative_t tid; |
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| 152 | |||
| 153 | klog_printf("debug_thread_read()"); |
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| 154 | // FIXME: verify task/thread state |
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| 155 | |||
| 156 | ta = get_lock_callee_task(phone); |
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| 157 | klog_printf("task %llu", ta->taskid); |
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| 158 | |||
| 159 | uspace_buffer = (void *)IPC_GET_ARG2(call->data); |
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| 160 | buf_size = IPC_GET_ARG3(call->data); |
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| 161 | |||
| 162 | copied = total = 0; |
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| 163 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
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| 164 | t = list_get_instance(cur, thread_t, th_link); |
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| 165 | |||
| 166 | /* Not interested in kernel threads */ |
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| 167 | if ((t->flags & THREAD_FLAG_USPACE) == 0) |
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| 168 | continue; |
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| 169 | |||
| 170 | //FIXME: id cropped!! |
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| 171 | tid = (unative_t) t->tid; |
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| 172 | |||
| 173 | to_copy = sizeof(unative_t); |
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| 174 | if (copied + to_copy >= buf_size) |
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| 175 | to_copy = buf_size - copied; |
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| 176 | |||
| 177 | if (to_copy > 0) { |
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| 178 | rc = copy_to_uspace(uspace_buffer, &tid, to_copy); |
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| 179 | if (rc != 0) { |
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| 180 | spinlock_unlock(&ta->lock); |
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| 181 | klog_printf("debug_thread_read() - copy failed"); |
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| 182 | return rc; |
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| 183 | } |
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| 184 | } |
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| 185 | |||
| 186 | ++uspace_buffer; |
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| 187 | total += sizeof(unative_t); |
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| 188 | copied += to_copy; |
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| 189 | } |
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| 190 | |||
| 191 | spinlock_unlock(&ta->lock); |
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| 192 | |||
| 193 | IPC_SET_ARG1(call->data, copied); |
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| 194 | IPC_SET_ARG2(call->data, total); |
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| 195 | |||
| 196 | klog_printf("debug_thread_read() done"); |
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| 197 | return 1; /* actually need becksend with retval 0 */ |
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| 198 | } |
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| 199 | |||
| 200 | int udebug_request_preprocess(call_t *call, phone_t *phone) |
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| 201 | { |
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| 202 | int rc; |
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| 203 | |||
| 204 | switch (IPC_GET_ARG1(call->data)) { |
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| 205 | case UDEBUG_M_BEGIN: |
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| 206 | rc = udebug_rp_begin(call, phone); |
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| 207 | return rc; |
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| 208 | case UDEBUG_M_GO: |
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| 209 | rc = udebug_rp_go(call, phone); |
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| 210 | return rc; |
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| 211 | case UDEBUG_M_ARGS_READ: |
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| 212 | rc = udebug_rp_args_read(call, phone); |
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| 213 | return rc; |
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| 214 | case UDEBUG_M_THREAD_READ: |
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| 215 | rc = udebug_rp_thread_read(call, phone); |
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| 216 | return rc; |
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| 217 | default: |
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| 218 | break; |
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| 219 | } |
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| 220 | |||
| 221 | return 0; |
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| 222 | } |
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| 223 | |||
| 224 | |||
| 225 | /** @} |
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| 226 | */ |