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  1. /** @addtogroup generic
  2.  * @{
  3.  */
  4.  
  5. /**
  6.  * @file
  7.  * @brief   Tdebug.
  8.  */
  9.  
  10. #include <synch/waitq.h>
  11. #include <console/klog.h>
  12. #include <udebug/udebug.h>
  13. #include <arch.h>
  14.  
  15. void udebug_stoppable_begin(void)
  16. {
  17.     int nsc;
  18.     call_t *db_call;
  19.     ipl_t ipl;
  20.  
  21.     ipl = interrupts_disable();
  22.     spinlock_lock(&TASK->lock);
  23.  
  24.     nsc = --TASK->not_stoppable_count;
  25.     db_call = TASK->debug_begin_call;
  26.  
  27.     if (TASK->dt_state == UDEBUG_TS_BEGINNING) {
  28.         klog_printf("udebug_stoppable_begin");
  29.         klog_printf(" - nsc := %d", nsc);
  30.     }
  31.  
  32.     if (TASK->dt_state == UDEBUG_TS_BEGINNING && nsc == 0) {
  33.         TASK->dt_state = UDEBUG_TS_ACTIVE;
  34.         TASK->debug_begin_call = NULL;
  35.         spinlock_unlock(&TASK->lock);
  36.         interrupts_restore(ipl);
  37.  
  38.         IPC_SET_RETVAL(db_call->data, 0);
  39.         klog_printf("udebug_stoppable_begin/ipc_answer");
  40.         ipc_answer(&TASK->answerbox, db_call);     
  41.     } else {
  42.             spinlock_unlock(&TASK->lock);
  43.         interrupts_restore(ipl);
  44.     }
  45. }
  46.  
  47. void udebug_stoppable_end(void)
  48. {
  49.     ipl_t ipl;
  50.  
  51. restart:
  52.     ipl = interrupts_disable();
  53.     spinlock_lock(&TASK->lock);
  54.  
  55.     if ((TASK->dt_state == UDEBUG_TS_BEGINNING ||
  56.         TASK->dt_state == UDEBUG_TS_ACTIVE) &&
  57.         THREAD->debug_stop == true) {
  58.         TASK->debug_begin_call = NULL;
  59.         spinlock_unlock(&TASK->lock);
  60.         interrupts_restore(ipl);
  61.  
  62.         klog_printf("udebug_stoppable_end: waitq_sleep");
  63.         waitq_sleep(&THREAD->go_wq);
  64.         goto restart;
  65.         /* must try again - have to lose stoppability atomically */
  66.     } else {
  67.         ++TASK->not_stoppable_count;
  68.         spinlock_unlock(&TASK->lock);
  69.         interrupts_restore(ipl);
  70.     }
  71. }
  72.  
  73. void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3,
  74.     unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc)
  75. {
  76.     call_t *call;
  77.     ipl_t ipl;
  78.  
  79.     ipl = interrupts_disable();
  80.     spinlock_lock(&THREAD->debug_lock);
  81.  
  82.     /* Must only generate events when in debugging session and have go */
  83.     if (THREAD->debug_active != true ||
  84.         THREAD->debug_stop == true) {
  85.         spinlock_unlock(&THREAD->debug_lock);
  86.         interrupts_restore(ipl);
  87.         return;
  88.     }
  89.  
  90.     klog_printf("udebug_syscall_event");
  91.     call = THREAD->debug_go_call;
  92.     IPC_SET_RETVAL(call->data, 0);
  93.     IPC_SET_ARG1(call->data, UDEBUG_EVENT_SYSCALL);
  94.     IPC_SET_ARG2(call->data, id);
  95.     IPC_SET_ARG3(call->data, rc);
  96.     klog_printf("udebug_syscall_event/ipc_answer");
  97.  
  98.     THREAD->syscall_args[0] = a1;
  99.     THREAD->syscall_args[1] = a2;
  100.     THREAD->syscall_args[2] = a3;
  101.     THREAD->syscall_args[3] = a4;
  102.     THREAD->syscall_args[4] = a5;
  103.     THREAD->syscall_args[5] = a6;
  104.  
  105.     /*
  106.      * Make sure debug_stop is true when going to sleep
  107.      * in case we get woken up by DEBUG_END. (At which
  108.      * point it must be back to the initial true value).
  109.      */
  110.     THREAD->debug_stop = true;
  111.  
  112.     THREAD->cur_event = UDEBUG_EVENT_SYSCALL;
  113.     spinlock_unlock(&THREAD->debug_lock);
  114.  
  115.     spinlock_lock(&TASK->lock);
  116.     ipc_answer(&TASK->answerbox, THREAD->debug_go_call);
  117.     spinlock_unlock(&TASK->lock);
  118.  
  119.     interrupts_restore(ipl);
  120.  
  121.     waitq_sleep(&THREAD->go_wq);
  122. }
  123.  
  124. void udebug_new_thread_event(struct thread *t)
  125. {
  126.     call_t *call;
  127.     ipl_t ipl;
  128.  
  129.     ipl = interrupts_disable();
  130.     spinlock_lock(&THREAD->debug_lock);
  131.  
  132.     klog_printf("udebug_new_thread_event");
  133.     klog_printf("- check state");
  134.  
  135.     /* Must only generate events when in debugging session */
  136.     if (THREAD->debug_active != true) {
  137.         klog_printf("- debug_active: %s, debug_stop: %s",
  138.             THREAD->debug_active ? "yes(+)" : "no(-)",
  139.             THREAD->debug_stop ? "yes(-)" : "no(+)");
  140.         spinlock_unlock(&THREAD->debug_lock);
  141.         interrupts_restore(ipl);
  142.         return;
  143.     }
  144.  
  145.     klog_printf("- trigger event");
  146.  
  147.     call = THREAD->debug_go_call;
  148.     IPC_SET_RETVAL(call->data, 0);
  149.     IPC_SET_ARG1(call->data, UDEBUG_EVENT_NEW_THREAD);
  150.     IPC_SET_ARG2(call->data, (unative_t)t);
  151.  
  152.     /*
  153.      * Make sure debug_stop is true when going to sleep
  154.      * in case we get woken up by DEBUG_END. (At which
  155.      * point it must be back to the initial true value).
  156.      */
  157.     THREAD->debug_stop = true;
  158.  
  159.     THREAD->cur_event = UDEBUG_EVENT_NEW_THREAD;
  160.     spinlock_unlock(&THREAD->debug_lock);
  161.  
  162.     spinlock_lock(&TASK->lock);
  163.     ipc_answer(&TASK->answerbox, THREAD->debug_go_call);
  164.     spinlock_unlock(&TASK->lock);
  165.  
  166.     interrupts_restore(ipl);
  167.     klog_printf("- sleep");
  168.  
  169.     waitq_sleep(&THREAD->go_wq);
  170. }
  171.  
  172.  
  173. /** @}
  174.  */
  175.