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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 trace_loop(void *thread_idx_arg)
  125. {
  126.     int rc;
  127.     unsigned sc_args[6];
  128.     unsigned copied;
  129.     unsigned ev_type;
  130.     unsigned sc_id;
  131.     int sc_rc;
  132.     int rv_type;
  133.     unsigned thread_idx;
  134.  
  135.     thread_idx = (unsigned)thread_idx_arg;
  136.     printf("trace_loop(%d)\n", thread_idx);
  137.  
  138.     while (!abort_trace) {
  139.  
  140.         /* Run thread until a syscall is executed */
  141.         rc = debug_go(phoneid, threadid_buf[thread_idx],
  142.             &ev_type, &sc_id, &sc_rc);
  143.  
  144.         printf("rc = %d, ev_type=%d\n", rc, ev_type);
  145.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  146.             printf("thread %u debugging finished\n", threadid_buf[thread_idx]);
  147.             break;
  148.         }
  149.  
  150.         /* Read syscall arguments */
  151.         if (rc >= 0) {
  152.             rc = debug_args_read(phoneid, threadid_buf[thread_idx],
  153.                 sc_args);
  154.         }
  155.  
  156.         async_serialize_start();
  157.  
  158.         printf("[%d] ", thread_idx);
  159.  
  160.         /* Print syscall name, id and arguments */
  161.         if (rc >= 0) {
  162.             printf("%s", syscall_desc[sc_id].name);
  163.             print_sc_args(sc_args, syscall_desc[sc_id].n_args);
  164.             rv_type = syscall_desc[sc_id].rv_type;
  165.             print_sc_retval(sc_rc, rv_type);
  166.         }
  167.  
  168.         async_serialize_end();
  169.  
  170.         switch (sc_id) {
  171.         case SYS_IPC_CALL_ASYNC_SLOW:
  172.             sc_ipc_call_async_slow(sc_args);
  173.             break;
  174.         default:
  175.             break;
  176.         }
  177.     }
  178.  
  179.     printf("trace_loop(%d) exiting\n", thread_idx);
  180. }
  181.  
  182.  
  183. void trace_active_task(void)
  184. {
  185.     int taskid;
  186.     int i;
  187.     int rc;
  188.     fid_t fid;
  189.  
  190.     printf("Syscall Tracer\n");
  191.     printf("Press 'c' to connect\n");
  192.     while ((i = getchar()) != 'c')
  193.         putchar(i);
  194.  
  195.     taskid = 14;
  196.     rc = task_connect(taskid);
  197.     if (rc < 0) {
  198.         printf("Failed to connect to task %d\n", taskid);
  199.         return;
  200.     }
  201.  
  202.     printf("Connected to task %d\n", taskid);
  203.  
  204.     rc = get_thread_list();
  205.     if (rc < 0) {
  206.         printf("Failed to get thread list (error %d)\n", rc);
  207.         return;
  208.     }
  209.  
  210.     abort_trace = 0;
  211.  
  212.     for (i = 0; i < n_threads; i++) {
  213.         fid = fibril_create(trace_loop, (void *)i);
  214.         if (fid == 0) {
  215.             printf("Warning: Failed creating fibril\n");
  216.         }
  217.         fibril_add_ready(fid);
  218.     }
  219.  
  220.     getchar();
  221.  
  222.     printf("terminate debugging session...\n");
  223.     abort_trace = 1;
  224.     debug_end(phoneid);
  225.     ipc_hangup(phoneid);
  226.  
  227.     printf("done\n");
  228.     return;
  229. }
  230.  
  231. int main(void)
  232. {
  233.     while (1) {
  234.         trace_active_task();
  235.     }
  236. }
  237.  
  238. /** @}
  239.  */
  240.