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  1. /** @addtogroup sctrace
  2.  * @{
  3.  */
  4. /** @file
  5.  */
  6.  
  7. #include <stdio.h>
  8. #include <unistd.h>
  9. #include <syscall.h>
  10. #include <ipc/ipc.h>
  11. #include <fibril.h>
  12. #include <errno.h>
  13. #include <udebug.h>
  14. #include <async.h>
  15.  
  16. #include "syscalls.h"
  17. #include "errors.h"
  18. #include "debug_api.h"
  19.  
  20. #define TIDBUF_SIZE 64
  21. unsigned threadid_buf[TIDBUF_SIZE];
  22. unsigned n_threads;
  23.  
  24. int phoneid;
  25. int abort_trace;
  26.  
  27. int task_connect(int taskid)
  28. {
  29.     int rc;
  30.  
  31.     printf("ipc_connect_task(%d)...\n", taskid);
  32.     rc = ipc_connect_kbox(taskid);
  33.     printf("-> %d\n", rc);
  34.     phoneid = rc;
  35.     if (rc < 0) return rc;
  36.  
  37.     printf("debug_begin()\n");
  38.     rc = debug_begin(phoneid);
  39.     printf("-> %d\n", rc);
  40.     if (rc < 0) return rc;
  41.  
  42.     return 0;
  43. }
  44.  
  45. int get_thread_list(void)
  46. {
  47.     int rc;
  48.     int tb_copied;
  49.     int tb_needed;
  50.     int i;
  51.  
  52.  
  53.     printf("send IPC_M_DEBUG_THREAD_READ message\n");
  54.     rc = debug_thread_read(phoneid, (unsigned)threadid_buf,
  55.         TIDBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);
  56.     printf("-> %d\n", rc);
  57.     if (rc < 0) return rc;
  58.  
  59.     n_threads = tb_copied / sizeof(unsigned);
  60.  
  61.     printf("thread IDs:");
  62.     for (i=0; i<n_threads; i++) {
  63.         printf(" %u", threadid_buf[i]);
  64.     }
  65.     printf("\ntotal of %u threads\n", tb_needed/sizeof(unsigned));
  66.  
  67.     return 0;
  68. }
  69.  
  70. void print_sc_retval(int retval, rv_type_t rv_type)
  71. {
  72.     printf (" -> ");
  73.     if (rv_type == RV_INTEGER) {
  74.         printf("%d", retval);
  75.     } else if (rv_type == RV_HASH) {
  76.         printf("0x%08x", retval);
  77.     } else if (rv_type == RV_ERRNO) {
  78.         if (retval >= -15 && retval <= 0) {
  79.             printf("%d %s (%s)", retval,
  80.                 err_desc[retval].name,
  81.                 err_desc[retval].desc);
  82.         } else {
  83.             printf("%d", retval);
  84.         }
  85.     } else if (rv_type == RV_INT_ERRNO) {
  86.         if (retval >= -15 && retval < 0) {
  87.             printf("%d %s (%s)", retval,
  88.                 err_desc[retval].name,
  89.                 err_desc[retval].desc);
  90.         } else {
  91.             printf("%d", retval);
  92.         }
  93.     }
  94.     putchar('\n');
  95. }
  96.  
  97. void print_sc_args(unsigned *sc_args, int n)
  98. {
  99.     int i;
  100.  
  101.     putchar('(');
  102.     if (n > 0) printf("%d", sc_args[0]);
  103.     for (i=1; i<n; i++) {
  104.         printf(", %d", sc_args[i]);
  105.     }
  106.     putchar(')');
  107. }
  108.  
  109. void sc_ipc_call_async_slow(unsigned *sc_args)
  110. {
  111.     unsigned ipc_args[6];
  112.     int rc;
  113.  
  114.     memset(ipc_args, 0, sizeof(ipc_args));
  115.     rc = debug_mem_read(phoneid, ipc_args, sc_args[1], sizeof(ipc_args));
  116.  
  117.     if (rc >= 0) {
  118.         printf("args: (%u, %u, %u, %u, %u, %u)\n",
  119.             ipc_args[0], ipc_args[1], ipc_args[2],
  120.             ipc_args[3], ipc_args[4], ipc_args[5]);
  121.     }
  122. }
  123.  
  124. void event_syscall(unsigned thread_idx, unsigned sc_id, int sc_rc)
  125. {
  126.     unsigned sc_args[6];
  127.     int rv_type;
  128.     int rc;
  129.  
  130.     /* Read syscall arguments */
  131.     rc = debug_args_read(phoneid, threadid_buf[thread_idx], sc_args);
  132.  
  133.     async_serialize_start();
  134.  
  135.     printf("[%d] ", thread_idx);
  136.  
  137.     if (rc < 0) {
  138.         printf("error\n");
  139.         async_serialize_end();
  140.         return;
  141.     }
  142.  
  143.     /* Print syscall name, id and arguments */
  144.     printf("%s", syscall_desc[sc_id].name);
  145.     print_sc_args(sc_args, syscall_desc[sc_id].n_args);
  146.     rv_type = syscall_desc[sc_id].rv_type;
  147.     print_sc_retval(sc_rc, rv_type);
  148.  
  149.     switch (sc_id) {
  150.     case SYS_IPC_CALL_ASYNC_SLOW:
  151.         sc_ipc_call_async_slow(sc_args);
  152.         break;
  153.     default:
  154.         break;
  155.     }
  156.  
  157.     async_serialize_end();
  158. }
  159.  
  160. void event_new_thread(unsigned hash)
  161. {
  162.     async_serialize_start();
  163.     printf("new thread, hash 0x%x\n", hash);
  164.     async_serialize_end();
  165. }
  166.  
  167. void trace_loop(void *thread_idx_arg)
  168. {
  169.     int rc;
  170.     unsigned ev_type;
  171.     unsigned thread_idx;
  172.     unsigned val0, val1;
  173.  
  174.     thread_idx = (unsigned)thread_idx_arg;
  175.     printf("trace_loop(%d)\n", thread_idx);
  176.  
  177.     while (!abort_trace) {
  178.  
  179.         /* Run thread until an event occurs */
  180.         rc = debug_go(phoneid, threadid_buf[thread_idx],
  181.             &ev_type, &val0, &val1);
  182.  
  183.         printf("rc = %d, ev_type=%d\n", rc, ev_type);
  184.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  185.             printf("thread %u debugging finished\n", threadid_buf[thread_idx]);
  186.             break;
  187.         }
  188.  
  189.         if (rc >= 0) {
  190.             switch (ev_type) {
  191.             case UDEBUG_EVENT_SYSCALL:
  192.                 event_syscall(thread_idx, val0, (int)val1);
  193.                 break;
  194.             case UDEBUG_EVENT_NEW_THREAD:
  195.                 event_new_thread(val0);
  196.                 break;
  197.             default:
  198.                 printf("unknown event type %d\n", ev_type);
  199.                 break;
  200.             }
  201.         }
  202.  
  203.     }
  204.  
  205.     printf("trace_loop(%d) exiting\n", thread_idx);
  206. }
  207.  
  208.  
  209. void trace_active_task(void)
  210. {
  211.     int taskid;
  212.     int i;
  213.     int rc;
  214.     fid_t fid;
  215.  
  216.     printf("Syscall Tracer\n");
  217.     printf("Press 'c' to connect\n");
  218.     while ((i = getchar()) != 'c')
  219.         putchar(i);
  220.  
  221.     taskid = 14;
  222.     rc = task_connect(taskid);
  223.     if (rc < 0) {
  224.         printf("Failed to connect to task %d\n", taskid);
  225.         return;
  226.     }
  227.  
  228.     printf("Connected to task %d\n", taskid);
  229.  
  230.     rc = get_thread_list();
  231.     if (rc < 0) {
  232.         printf("Failed to get thread list (error %d)\n", rc);
  233.         return;
  234.     }
  235.  
  236.     abort_trace = 0;
  237.  
  238.     for (i = 0; i < n_threads; i++) {
  239.         fid = fibril_create(trace_loop, (void *)i);
  240.         if (fid == 0) {
  241.             printf("Warning: Failed creating fibril\n");
  242.         }
  243.         fibril_add_ready(fid);
  244.     }
  245.  
  246.     getchar();
  247.  
  248.     printf("terminate debugging session...\n");
  249.     abort_trace = 1;
  250.     debug_end(phoneid);
  251.     ipc_hangup(phoneid);
  252.  
  253.     printf("done\n");
  254.     return;
  255. }
  256.  
  257. int main(void)
  258. {
  259.     while (1) {
  260.         trace_active_task();
  261.     }
  262. }
  263.  
  264. /** @}
  265.  */
  266.