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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 "ipc.h"
  18. #include "errors.h"
  19. #include "debug_api.h"
  20.  
  21. #define THBUF_SIZE 64
  22. unsigned thread_hash_buf[THBUF_SIZE];
  23. unsigned n_threads;
  24.  
  25. int next_thread_id;
  26.  
  27. int phoneid;
  28. int abort_trace;
  29.  
  30. void thread_trace_start(unsigned thread_hash);
  31.  
  32.  
  33. int task_connect(int taskid)
  34. {
  35.     int rc;
  36.  
  37.     printf("ipc_connect_task(%d)...\n", taskid);
  38.     rc = ipc_connect_kbox(taskid);
  39.     printf("-> %d\n", rc);
  40.     phoneid = rc;
  41.     if (rc < 0) return rc;
  42.  
  43.     printf("debug_begin()\n");
  44.     rc = debug_begin(phoneid);
  45.     printf("-> %d\n", rc);
  46.     if (rc < 0) return rc;
  47.  
  48.     return 0;
  49. }
  50.  
  51. int get_thread_list(void)
  52. {
  53.     int rc;
  54.     int tb_copied;
  55.     int tb_needed;
  56.     int i;
  57.  
  58.  
  59.     printf("send IPC_M_DEBUG_THREAD_READ message\n");
  60.     rc = debug_thread_read(phoneid, (unsigned)thread_hash_buf,
  61.         THBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);
  62.     printf("-> %d\n", rc);
  63.     if (rc < 0) return rc;
  64.  
  65.     n_threads = tb_copied / sizeof(unsigned);
  66.  
  67.     printf("thread IDs:");
  68.     for (i=0; i<n_threads; i++) {
  69.         printf(" %u", thread_hash_buf[i]);
  70.     }
  71.     printf("\ntotal of %u threads\n", tb_needed/sizeof(unsigned));
  72.  
  73.     return 0;
  74. }
  75.  
  76. void print_sc_retval(int retval, rv_type_t rv_type)
  77. {
  78.     printf (" -> ");
  79.     if (rv_type == RV_INTEGER) {
  80.         printf("%d", retval);
  81.     } else if (rv_type == RV_HASH) {
  82.         printf("0x%08x", retval);
  83.     } else if (rv_type == RV_ERRNO) {
  84.         if (retval >= -15 && retval <= 0) {
  85.             printf("%d %s (%s)", retval,
  86.                 err_desc[retval].name,
  87.                 err_desc[retval].desc);
  88.         } else {
  89.             printf("%d", retval);
  90.         }
  91.     } else if (rv_type == RV_INT_ERRNO) {
  92.         if (retval >= -15 && retval < 0) {
  93.             printf("%d %s (%s)", retval,
  94.                 err_desc[retval].name,
  95.                 err_desc[retval].desc);
  96.         } else {
  97.             printf("%d", retval);
  98.         }
  99.     }
  100.     putchar('\n');
  101. }
  102.  
  103. void print_sc_args(unsigned *sc_args, int n)
  104. {
  105.     int i;
  106.  
  107.     putchar('(');
  108.     if (n > 0) printf("%d", sc_args[0]);
  109.     for (i=1; i<n; i++) {
  110.         printf(", %d", sc_args[i]);
  111.     }
  112.     putchar(')');
  113. }
  114.  
  115. void sc_ipc_call_async_fast(unsigned *sc_args)
  116. {
  117.     ipc_call_t call;
  118.     int phoneid;
  119.  
  120.     phoneid = sc_args[0];
  121.  
  122.     IPC_SET_METHOD(call, sc_args[1]);
  123.     IPC_SET_ARG1(call, sc_args[2]);
  124.     IPC_SET_ARG2(call, sc_args[3]);
  125.     IPC_SET_ARG3(call, sc_args[4]);
  126.     IPC_SET_ARG4(call, sc_args[5]);
  127.     IPC_SET_ARG5(call, 0);
  128.  
  129.     ipc_parse_call_out(phoneid, &call);
  130. }
  131.  
  132. void sc_ipc_call_async_slow(unsigned *sc_args)
  133. {
  134.     ipc_call_t call;
  135.     int rc;
  136.  
  137.     memset(&call, 0, sizeof(call));
  138.     rc = debug_mem_read(phoneid, &call.args, sc_args[1], sizeof(call.args));
  139.  
  140.     if (rc >= 0) {
  141.         ipc_parse_call_out(sc_args[0], &call);
  142.     }
  143. }
  144.  
  145. void sc_ipc_wait(unsigned *sc_args, int sc_rc)
  146. {
  147.     ipc_call_t call;
  148.     int rc;
  149.  
  150.     if (sc_rc == 0) return 0;
  151.  
  152.     memset(&call, 0, sizeof(call));
  153.     rc = debug_mem_read(phoneid, &call, sc_args[0], sizeof(call));
  154.     printf("debug_mem_read(phone %d, dest %d, app-mem src %d, size %d -> %d\n",
  155.         phoneid, (int)&call, sc_args[0], sizeof(call), rc);
  156.  
  157.     if (rc >= 0) {
  158.         ipc_parse_call_in(&call);
  159.     }
  160. }
  161.  
  162. void event_syscall(unsigned thread_id, unsigned thread_hash,  unsigned sc_id, int sc_rc)
  163. {
  164.     unsigned sc_args[6];
  165.     int rv_type;
  166.     int rc;
  167.  
  168.     /* Read syscall arguments */
  169.     rc = debug_args_read(phoneid, thread_hash, sc_args);
  170.  
  171.     async_serialize_start();
  172.  
  173.     printf("[%d] ", thread_id);
  174.  
  175.     if (rc < 0) {
  176.         printf("error\n");
  177.         async_serialize_end();
  178.         return;
  179.     }
  180.  
  181.     /* Print syscall name, id and arguments */
  182.     printf("%s", syscall_desc[sc_id].name);
  183.     print_sc_args(sc_args, syscall_desc[sc_id].n_args);
  184.     rv_type = syscall_desc[sc_id].rv_type;
  185.     print_sc_retval(sc_rc, rv_type);
  186.  
  187.     switch (sc_id) {
  188.     case SYS_IPC_CALL_ASYNC_FAST:
  189.         sc_ipc_call_async_fast(sc_args);
  190.         break;
  191.     case SYS_IPC_CALL_ASYNC_SLOW:
  192.         sc_ipc_call_async_slow(sc_args);
  193.         break;
  194.     case SYS_IPC_WAIT:
  195.         sc_ipc_wait(sc_args, sc_rc);
  196.         break;
  197.     default:
  198.         break;
  199.     }
  200.  
  201.     async_serialize_end();
  202. }
  203.  
  204. void event_new_thread(unsigned hash)
  205. {
  206.     async_serialize_start();
  207.     printf("new thread, hash 0x%x\n", hash);
  208.     async_serialize_end();
  209.  
  210.     thread_trace_start(hash);
  211. }
  212.  
  213. void trace_loop(void *thread_hash_arg)
  214. {
  215.     int rc;
  216.     unsigned ev_type;
  217.     unsigned thread_hash;
  218.     unsigned thread_id;
  219.     unsigned val0, val1;
  220.  
  221.     thread_hash = (unsigned)thread_hash_arg;
  222.     thread_id = next_thread_id++;
  223.  
  224.     printf("trace_loop(%d)\n", thread_id); 
  225.  
  226.     while (!abort_trace) {
  227.  
  228.         /* Run thread until an event occurs */
  229.         rc = debug_go(phoneid, thread_hash,
  230.             &ev_type, &val0, &val1);
  231.  
  232.         printf("rc = %d, ev_type=%d\n", rc, ev_type);
  233.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  234.             printf("thread %u debugging finished\n", thread_id);
  235.             break;
  236.         }
  237.  
  238.         if (rc >= 0) {
  239.             switch (ev_type) {
  240.             case UDEBUG_EVENT_SYSCALL:
  241.                 event_syscall(thread_id, thread_hash, val0, (int)val1);
  242.                 break;
  243.             case UDEBUG_EVENT_NEW_THREAD:
  244.                 event_new_thread(val0);
  245.                 break;
  246.             default:
  247.                 printf("unknown event type %d\n", ev_type);
  248.                 break;
  249.             }
  250.         }
  251.  
  252.     }
  253.  
  254.     printf("trace_loop(%d) exiting\n", thread_id);
  255. }
  256.  
  257. void thread_trace_start(unsigned thread_hash)
  258. {
  259.     fid_t fid;
  260.  
  261.     fid = fibril_create(trace_loop, (void *)thread_hash);
  262.     if (fid == 0) {
  263.         printf("Warning: Failed creating fibril\n");
  264.     }
  265.     fibril_add_ready(fid);
  266. }
  267.  
  268. void trace_active_task(void)
  269. {
  270.     int taskid;
  271.     int i;
  272.     int rc;
  273.  
  274.     printf("Syscall Tracer\n");
  275.     printf("Press 'c' to connect\n");
  276.     while ((i = getchar()) != 'c')
  277.         putchar(i);
  278.  
  279.     taskid = 14;
  280.     rc = task_connect(taskid);
  281.     if (rc < 0) {
  282.         printf("Failed to connect to task %d\n", taskid);
  283.         return;
  284.     }
  285.  
  286.     printf("Connected to task %d\n", taskid);
  287.  
  288.     rc = get_thread_list();
  289.     if (rc < 0) {
  290.         printf("Failed to get thread list (error %d)\n", rc);
  291.         return;
  292.     }
  293.  
  294.     abort_trace = 0;
  295.  
  296.     for (i = 0; i < n_threads; i++) {
  297.         thread_trace_start(thread_hash_buf[i]);
  298.     }
  299.  
  300.     getchar();
  301.  
  302.     printf("terminate debugging session...\n");
  303.     abort_trace = 1;
  304.     debug_end(phoneid);
  305.     ipc_hangup(phoneid);
  306.  
  307.     printf("done\n");
  308.     return;
  309. }
  310.  
  311. int main(void)
  312. {
  313.     next_thread_id = 1;
  314.  
  315.     while (1) {
  316.         trace_active_task();
  317.     }
  318. }
  319.  
  320. /** @}
  321.  */
  322.