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  1. /*
  2.  * Copyright (c) 2008 Jiri Svoboda
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup trace
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <stdio.h>
  36. #include <stdlib.h>
  37. #include <unistd.h>
  38. #include <ipc/ipc.h>
  39. #include <fibril.h>
  40. #include <errno.h>
  41. #include <udebug.h>
  42. #include <async.h>
  43. #include <task.h>
  44. #include <loader/loader.h>
  45.  
  46. #include <libc.h>
  47.  
  48. // Temporary: service and method names
  49. #include "proto.h"
  50. #include <ipc/services.h>
  51. #include "../../srv/vfs/vfs.h"
  52. #include "../../srv/console/console.h"
  53.  
  54. #include "syscalls.h"
  55. #include "ipcp.h"
  56. #include "errors.h"
  57. #include "trace.h"
  58.  
  59. #define THBUF_SIZE 64
  60. uintptr_t thread_hash_buf[THBUF_SIZE];
  61. int n_threads;
  62.  
  63. int next_thread_id;
  64.  
  65. int phoneid;
  66. int abort_trace;
  67.  
  68. uintptr_t thash;
  69. volatile int paused;
  70.  
  71. void thread_trace_start(uintptr_t thread_hash);
  72.  
  73. static proto_t *proto_console;
  74. static task_id_t task_id;
  75. static loader_t *task_ldr;
  76.  
  77. /** Combination of events/data to print. */
  78. display_mask_t display_mask;
  79.  
  80. static int program_run_fibril(void *arg);
  81.  
  82. static void program_run(void)
  83. {
  84.     fid_t fid;
  85.  
  86.     fid = fibril_create(program_run_fibril, NULL);
  87.     if (fid == 0) {
  88.         printf("Error creating fibril\n");
  89.         exit(1);
  90.     }
  91.  
  92.     fibril_add_ready(fid);
  93. }
  94.  
  95. static int program_run_fibril(void *arg)
  96. {
  97.     int rc;
  98.  
  99.     /*
  100.      * This must be done in background as it will block until
  101.      * we let the task reply to this call.
  102.      */
  103.     rc = loader_run(task_ldr);
  104.     if (rc != 0) {
  105.         printf("Error running program\n");
  106.         exit(1);
  107.     }
  108.  
  109.     free(task_ldr);
  110.     task_ldr = NULL;
  111.  
  112.     printf("program_run_fibril exiting\n");
  113.     return 0;
  114. }
  115.  
  116.  
  117. static int connect_task(task_id_t task_id)
  118. {
  119.     int rc;
  120.  
  121.     rc = ipc_connect_kbox(task_id);
  122.  
  123.     if (rc == ENOTSUP) {
  124.         printf("You do not have userspace debugging support "
  125.             "compiled in the kernel.\n");
  126.         printf("Compile kernel with 'Support for userspace debuggers' "
  127.             "(CONFIG_UDEBUG) enabled.\n");
  128.         return rc;
  129.     }
  130.  
  131.     if (rc < 0) {
  132.         printf("Error connecting\n");
  133.         printf("ipc_connect_task(%lld) -> %d ", task_id, rc);
  134.         return rc;
  135.     }
  136.  
  137.     phoneid = rc;
  138.  
  139.     rc = udebug_begin(phoneid);
  140.     if (rc < 0) {
  141.         printf("udebug_begin() -> %d\n", rc);
  142.         return rc;
  143.     }
  144.  
  145.     rc = udebug_set_evmask(phoneid, UDEBUG_EM_ALL);
  146.     if (rc < 0) {
  147.         printf("udebug_set_evmask(0x%x) -> %d\n ", UDEBUG_EM_ALL, rc);
  148.         return rc;
  149.     }
  150.  
  151.     return 0;
  152. }
  153.  
  154. static int get_thread_list(void)
  155. {
  156.     int rc;
  157.     size_t tb_copied;
  158.     size_t tb_needed;
  159.     int i;
  160.  
  161.     rc = udebug_thread_read(phoneid, thread_hash_buf,
  162.         THBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);
  163.     if (rc < 0) {
  164.         printf("udebug_thread_read() -> %d\n", rc);
  165.         return rc;
  166.     }
  167.  
  168.     n_threads = tb_copied / sizeof(uintptr_t);
  169.  
  170.     printf("Threads:");
  171.     for (i = 0; i < n_threads; i++) {
  172.         printf(" [%d] (hash 0x%lx)", 1+i, thread_hash_buf[i]);
  173.     }
  174.     printf("\ntotal of %u threads\n", tb_needed / sizeof(uintptr_t));
  175.  
  176.     return 0;
  177. }
  178.  
  179. void val_print(sysarg_t val, val_type_t v_type)
  180. {
  181.     switch (v_type) {
  182.     case V_VOID:
  183.         printf("<void>");
  184.         break;
  185.  
  186.     case V_INTEGER:
  187.         printf("%ld", val);
  188.         break;
  189.  
  190.     case V_HASH:
  191.     case V_PTR:
  192.         printf("0x%08lx", val);
  193.         break;
  194.  
  195.     case V_ERRNO:
  196.         if (val >= -15 && val <= 0) {
  197.             printf("%ld %s (%s)", val,
  198.                 err_desc[-val].name,
  199.                 err_desc[-val].desc);
  200.         } else {
  201.             printf("%ld", val);
  202.         }
  203.         break;
  204.     case V_INT_ERRNO:
  205.         if (val >= -15 && val < 0) {
  206.             printf("%ld %s (%s)", val,
  207.                 err_desc[-val].name,
  208.                 err_desc[-val].desc);
  209.         } else {
  210.             printf("%ld", val);
  211.         }
  212.         break;
  213.  
  214.     case V_CHAR:
  215.         if (val >= 0x20 && val < 0x7f) {
  216.             printf("'%c'", val);
  217.         } else {
  218.             switch (val) {
  219.             case '\a': printf("'\\a'"); break;
  220.             case '\b': printf("'\\b'"); break;
  221.             case '\n': printf("'\\n'"); break;
  222.             case '\r': printf("'\\r'"); break;
  223.             case '\t': printf("'\\t'"); break;
  224.             case '\\': printf("'\\\\'"); break;
  225.             default: printf("'\\x%02lX'", val); break;
  226.             }
  227.         }
  228.         break;
  229.     }
  230. }
  231.  
  232.  
  233. static void print_sc_retval(sysarg_t retval, val_type_t val_type)
  234. {
  235.     printf(" -> ");
  236.     val_print(retval, val_type);
  237.     putchar('\n');
  238. }
  239.  
  240. static void print_sc_args(sysarg_t *sc_args, int n)
  241. {
  242.     int i;
  243.  
  244.     putchar('(');
  245.     if (n > 0) printf("%ld", sc_args[0]);
  246.     for (i = 1; i < n; i++) {
  247.         printf(", %ld", sc_args[i]);
  248.     }
  249.     putchar(')');
  250. }
  251.  
  252. static void sc_ipc_call_async_fast(sysarg_t *sc_args, sysarg_t sc_rc)
  253. {
  254.     ipc_call_t call;
  255.     ipcarg_t phoneid;
  256.    
  257.     if (sc_rc == IPC_CALLRET_FATAL || sc_rc == IPC_CALLRET_TEMPORARY)
  258.         return;
  259.  
  260.     phoneid = sc_args[0];
  261.  
  262.     IPC_SET_METHOD(call, sc_args[1]);
  263.     IPC_SET_ARG1(call, sc_args[2]);
  264.     IPC_SET_ARG2(call, sc_args[3]);
  265.     IPC_SET_ARG3(call, sc_args[4]);
  266.     IPC_SET_ARG4(call, sc_args[5]);
  267.     IPC_SET_ARG5(call, 0);
  268.  
  269.     ipcp_call_out(phoneid, &call, sc_rc);
  270. }
  271.  
  272. static void sc_ipc_call_async_slow(sysarg_t *sc_args, sysarg_t sc_rc)
  273. {
  274.     ipc_call_t call;
  275.     int rc;
  276.  
  277.     if (sc_rc == IPC_CALLRET_FATAL || sc_rc == IPC_CALLRET_TEMPORARY)
  278.         return;
  279.  
  280.     memset(&call, 0, sizeof(call));
  281.     rc = udebug_mem_read(phoneid, &call.args, sc_args[1], sizeof(call.args));
  282.  
  283.     if (rc >= 0) {
  284.         ipcp_call_out(sc_args[0], &call, sc_rc);
  285.     }
  286. }
  287.  
  288. static void sc_ipc_call_sync_fast(sysarg_t *sc_args)
  289. {
  290.     ipc_call_t question, reply;
  291.     int rc;
  292.     int phoneidx;
  293.  
  294. //  printf("sc_ipc_call_sync_fast()\n");
  295.     phoneidx = sc_args[0];
  296.  
  297.     IPC_SET_METHOD(question, sc_args[1]);
  298.     IPC_SET_ARG1(question, sc_args[2]);
  299.     IPC_SET_ARG2(question, sc_args[3]);
  300.     IPC_SET_ARG3(question, sc_args[4]);
  301.     IPC_SET_ARG4(question, 0);
  302.     IPC_SET_ARG5(question, 0);
  303.  
  304. //  printf("memset\n");
  305.     memset(&reply, 0, sizeof(reply));
  306. //  printf("udebug_mem_read(phone=%d, buffer_ptr=%u, src_addr=%d, n=%d\n",
  307. //      phoneid, &reply.args, sc_args[5], sizeof(reply.args));
  308.     rc = udebug_mem_read(phoneid, &reply.args, sc_args[5], sizeof(reply.args));
  309. //  printf("dmr->%d\n", rc);
  310.     if (rc < 0) return;
  311.  
  312. //  printf("call ipc_call_sync\n");
  313.     ipcp_call_sync(phoneidx, &question, &reply);
  314. }
  315.  
  316. static void sc_ipc_call_sync_slow(sysarg_t *sc_args)
  317. {
  318.     ipc_call_t question, reply;
  319.     int rc;
  320.  
  321.     memset(&question, 0, sizeof(question));
  322.     rc = udebug_mem_read(phoneid, &question.args, sc_args[1], sizeof(question.args));
  323.     printf("dmr->%d\n", rc);
  324.     if (rc < 0) return;
  325.  
  326.     memset(&reply, 0, sizeof(reply));
  327.     rc = udebug_mem_read(phoneid, &reply.args, sc_args[2], sizeof(reply.args));
  328.     printf("dmr->%d\n", rc);
  329.     if (rc < 0) return;
  330.  
  331.     ipcp_call_sync(sc_args[0], &question, &reply);
  332. }
  333.  
  334. static void sc_ipc_wait(sysarg_t *sc_args, int sc_rc)
  335. {
  336.     ipc_call_t call;
  337.     int rc;
  338.  
  339.     if (sc_rc == 0) return;
  340.  
  341.     memset(&call, 0, sizeof(call));
  342.     rc = udebug_mem_read(phoneid, &call, sc_args[0], sizeof(call));
  343. //  printf("udebug_mem_read(phone %d, dest %d, app-mem src %d, size %d -> %d\n",
  344. //      phoneid, (int)&call, sc_args[0], sizeof(call), rc);
  345.  
  346.     if (rc >= 0) {
  347.         ipcp_call_in(&call, sc_rc);
  348.     }
  349. }
  350.  
  351. static void event_syscall_b(unsigned thread_id, uintptr_t thread_hash,
  352.     unsigned sc_id, sysarg_t sc_rc)
  353. {
  354.     sysarg_t sc_args[6];
  355.     int rc;
  356.  
  357.     /* Read syscall arguments */
  358.     rc = udebug_args_read(phoneid, thread_hash, sc_args);
  359.  
  360.     async_serialize_start();
  361.  
  362. //  printf("[%d] ", thread_id);
  363.  
  364.     if (rc < 0) {
  365.         printf("error\n");
  366.         async_serialize_end();
  367.         return;
  368.     }
  369.  
  370.     if ((display_mask & DM_SYSCALL) != 0) {
  371.         /* Print syscall name and arguments */
  372.         printf("%s", syscall_desc[sc_id].name);
  373.         print_sc_args(sc_args, syscall_desc[sc_id].n_args);
  374.     }
  375.  
  376.     async_serialize_end();
  377. }
  378.  
  379. static void event_syscall_e(unsigned thread_id, uintptr_t thread_hash,
  380.     unsigned sc_id, sysarg_t sc_rc)
  381. {
  382.     sysarg_t sc_args[6];
  383.     int rv_type;
  384.     int rc;
  385.  
  386.     /* Read syscall arguments */
  387.     rc = udebug_args_read(phoneid, thread_hash, sc_args);
  388.  
  389.     async_serialize_start();
  390.  
  391. //  printf("[%d] ", thread_id);
  392.  
  393.     if (rc < 0) {
  394.         printf("error\n");
  395.         async_serialize_end();
  396.         return;
  397.     }
  398.  
  399.     if ((display_mask & DM_SYSCALL) != 0) {
  400.         /* Print syscall return value */
  401.         rv_type = syscall_desc[sc_id].rv_type;
  402.         print_sc_retval(sc_rc, rv_type);
  403.     }
  404.  
  405.     switch (sc_id) {
  406.     case SYS_IPC_CALL_ASYNC_FAST:
  407.         sc_ipc_call_async_fast(sc_args, sc_rc);
  408.         break;
  409.     case SYS_IPC_CALL_ASYNC_SLOW:
  410.         sc_ipc_call_async_slow(sc_args, sc_rc);
  411.         break;
  412.     case SYS_IPC_CALL_SYNC_FAST:
  413.         sc_ipc_call_sync_fast(sc_args);
  414.         break;
  415.     case SYS_IPC_CALL_SYNC_SLOW:
  416.         sc_ipc_call_sync_slow(sc_args);
  417.         break;
  418.     case SYS_IPC_WAIT:
  419.         sc_ipc_wait(sc_args, sc_rc);
  420.         break;
  421.     default:
  422.         break;
  423.     }
  424.  
  425.     async_serialize_end();
  426. }
  427.  
  428. static void event_thread_b(uintptr_t hash)
  429. {
  430.     async_serialize_start();
  431.     printf("New thread, hash 0x%lx\n", hash);
  432.     async_serialize_end();
  433.  
  434.     thread_trace_start(hash);
  435. }
  436.  
  437. static int trace_loop(void *thread_hash_arg)
  438. {
  439.     int rc;
  440.     unsigned ev_type;
  441.     uintptr_t thread_hash;
  442.     unsigned thread_id;
  443.     sysarg_t val0, val1;
  444.  
  445.     thread_hash = (uintptr_t)thread_hash_arg;
  446.     thread_id = next_thread_id++;
  447.  
  448.     printf("Start tracing thread [%d] (hash 0x%lx).\n", thread_id, thread_hash);
  449.  
  450.     while (!abort_trace) {
  451.  
  452.         if (paused) {
  453.             printf("Press R to resume (and be patient).\n");
  454.             while (paused) {
  455.                 usleep(1000000);
  456.                 fibril_yield();
  457.                 printf(".");
  458.             }
  459.             printf("Resumed\n");
  460.         }
  461.  
  462.         /* Run thread until an event occurs */
  463.         rc = udebug_go(phoneid, thread_hash,
  464.             &ev_type, &val0, &val1);
  465.  
  466. //      printf("rc = %d, ev_type=%d\n", rc, ev_type);
  467.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  468.             /* Done tracing this thread */
  469.             break;
  470.         }
  471.  
  472.         if (rc >= 0) {
  473.             switch (ev_type) {
  474.             case UDEBUG_EVENT_SYSCALL_B:
  475.                 event_syscall_b(thread_id, thread_hash, val0, (int)val1);
  476.                 break;
  477.             case UDEBUG_EVENT_SYSCALL_E:
  478.                 event_syscall_e(thread_id, thread_hash, val0, (int)val1);
  479.                 break;
  480.             case UDEBUG_EVENT_STOP:
  481.                 printf("Stop event\n");
  482.                 break;
  483.             case UDEBUG_EVENT_THREAD_B:
  484.                 event_thread_b(val0);
  485.                 break;
  486.             case UDEBUG_EVENT_THREAD_E:
  487.                 printf("Thread 0x%lx exited.\n", val0);
  488.                 abort_trace = 1;
  489.                 break;
  490.             default:
  491.                 printf("Unknown event type %d.\n", ev_type);
  492.                 break;
  493.             }
  494.         }
  495.  
  496.     }
  497.  
  498.     printf("Finished tracing thread [%d].\n", thread_id);
  499.     return 0;
  500. }
  501.  
  502. void thread_trace_start(uintptr_t thread_hash)
  503. {
  504.     fid_t fid;
  505.  
  506.     thash = thread_hash;
  507.  
  508.     fid = fibril_create(trace_loop, (void *)thread_hash);
  509.     if (fid == 0) {
  510.         printf("Warning: Failed creating fibril\n");
  511.     }
  512.     fibril_add_ready(fid);
  513. }
  514.  
  515. static loader_t *preload_task(const char *path, char *const argv[],
  516.     task_id_t *task_id)
  517. {
  518.     loader_t *ldr;
  519.     int rc;
  520.  
  521.     /* Spawn a program loader */   
  522.     ldr = loader_spawn(path);
  523.     if (ldr == NULL)
  524.         return 0;
  525.  
  526.     /* Get task ID. */
  527.     rc = loader_get_task_id(ldr, task_id);
  528.     if (rc != EOK)
  529.         goto error;
  530.  
  531.     /* Send program pathname */
  532.     rc = loader_set_pathname(ldr, path);
  533.     if (rc != EOK)
  534.         goto error;
  535.  
  536.     /* Send arguments */
  537.     rc = loader_set_args(ldr, argv);
  538.     if (rc != EOK)
  539.         goto error;
  540.  
  541.     /* Load the program. */
  542.     rc = loader_load_program(ldr);
  543.     if (rc != EOK)
  544.         goto error;
  545.  
  546.     /* Success */
  547.     return ldr;
  548.  
  549.     /* Error exit */
  550. error:
  551.     loader_abort(ldr);
  552.     free(ldr);
  553.     return NULL;
  554. }
  555.  
  556. static void trace_task(task_id_t task_id)
  557. {
  558.     int i;
  559.     int rc;
  560.     int c;
  561.  
  562.     ipcp_init();
  563.  
  564.     /*
  565.      * User apps now typically have console on phone 3.
  566.      * (Phones 1 and 2 are used by the loader).
  567.      */
  568.     ipcp_connection_set(3, 0, proto_console);
  569.  
  570.     rc = get_thread_list();
  571.     if (rc < 0) {
  572.         printf("Failed to get thread list (error %d)\n", rc);
  573.         return;
  574.     }
  575.  
  576.     abort_trace = 0;
  577.  
  578.     for (i = 0; i < n_threads; i++) {
  579.         thread_trace_start(thread_hash_buf[i]);
  580.     }
  581.  
  582.     while(1) {
  583.         c = getchar();
  584.         if (c == 'q') break;
  585.         if (c == 'p') {
  586.             printf("Pause...\n");
  587.             paused = 1;
  588.             rc = udebug_stop(phoneid, thash);
  589.             printf("stop -> %d\n", rc);
  590.         }
  591.         if (c == 'r') {
  592.             paused = 0;
  593.             printf("Resume...\n");
  594.         }
  595.     }
  596.  
  597.     printf("\nTerminate debugging session...\n");
  598.     abort_trace = 1;
  599.     udebug_end(phoneid);
  600.     ipc_hangup(phoneid);
  601.  
  602.     ipcp_cleanup();
  603.  
  604.     printf("Done\n");
  605.     return;
  606. }
  607.  
  608. static void main_init(void)
  609. {
  610.     proto_t *p;
  611.     oper_t *o;
  612.  
  613.     val_type_t arg_def[OPER_MAX_ARGS] = {
  614.         V_INTEGER,
  615.         V_INTEGER,
  616.         V_INTEGER,
  617.         V_INTEGER,
  618.         V_INTEGER      
  619.     };
  620.  
  621.     val_type_t resp_def[OPER_MAX_ARGS] = {
  622.         V_INTEGER,
  623.         V_INTEGER,
  624.         V_INTEGER,
  625.         V_INTEGER,
  626.         V_INTEGER      
  627.     };
  628.  
  629.     next_thread_id = 1;
  630.     paused = 0;
  631.  
  632.     proto_init();
  633.  
  634.     p = proto_new("vfs");
  635.     o = oper_new("read", 1, arg_def, V_ERRNO, 1, resp_def);
  636.     proto_add_oper(p, VFS_READ, o);
  637.     o = oper_new("write", 1, arg_def, V_ERRNO, 1, resp_def);
  638.     proto_add_oper(p, VFS_WRITE, o);
  639.     o = oper_new("truncate", 5, arg_def, V_ERRNO, 0, resp_def);
  640.     proto_add_oper(p, VFS_TRUNCATE, o);
  641.     o = oper_new("mount", 2, arg_def, V_ERRNO, 0, resp_def);
  642.     proto_add_oper(p, VFS_MOUNT, o);
  643. /*  o = oper_new("unmount", 0, arg_def);
  644.     proto_add_oper(p, VFS_UNMOUNT, o);*/
  645.  
  646.     proto_register(SERVICE_VFS, p);
  647.  
  648.     p = proto_new("console");
  649.     resp_def[0] = V_CHAR;
  650.     o = oper_new("getchar", 0, arg_def, V_INTEGER, 2, resp_def);
  651.     proto_add_oper(p, CONSOLE_GETCHAR, o);
  652.  
  653.     arg_def[0] = V_CHAR;
  654.     o = oper_new("putchar", 1, arg_def, V_VOID, 0, resp_def);
  655.     proto_add_oper(p, CONSOLE_PUTCHAR, o);
  656.     o = oper_new("clear", 0, arg_def, V_VOID, 0, resp_def);
  657.     proto_add_oper(p, CONSOLE_CLEAR, o);
  658.  
  659.     arg_def[0] = V_INTEGER; arg_def[1] = V_INTEGER;
  660.     o = oper_new("goto", 2, arg_def, V_VOID, 0, resp_def);
  661.     proto_add_oper(p, CONSOLE_GOTO, o);
  662.  
  663.     resp_def[0] = V_INTEGER; resp_def[1] = V_INTEGER;
  664.     o = oper_new("getsize", 0, arg_def, V_INTEGER, 2, resp_def);
  665.     proto_add_oper(p, CONSOLE_GETSIZE, o);
  666.     o = oper_new("flush", 0, arg_def, V_VOID, 0, resp_def);
  667.     proto_add_oper(p, CONSOLE_FLUSH, o);
  668.  
  669.     arg_def[0] = V_INTEGER; arg_def[1] = V_INTEGER;
  670.     o = oper_new("set_style", 2, arg_def, V_INTEGER, 0, resp_def);
  671.     proto_add_oper(p, CONSOLE_SET_STYLE, o);
  672.     o = oper_new("cursor_visibility", 1, arg_def, V_VOID, 0, resp_def);
  673.     proto_add_oper(p, CONSOLE_CURSOR_VISIBILITY, o);
  674.  
  675.     proto_console = p;
  676.     proto_register(SERVICE_CONSOLE, p);
  677. }
  678.  
  679. static void print_syntax()
  680. {
  681.     printf("Syntax:\n");
  682.     printf("\ttrace [+<events>] <executable> [<arg1> [...]]\n");
  683.     printf("or\ttrace [+<events>] -t <task_id>\n");
  684.     printf("Events: (default is +tp)\n");
  685.     printf("\n");
  686.     printf("\tt ... Thread creation and termination\n");
  687.     printf("\ts ... System calls\n");
  688.     printf("\ti ... Low-level IPC\n");
  689.     printf("\tp ... Protocol level\n");
  690.     printf("\n");
  691.     printf("Examples:\n");
  692.     printf("\ttrace +s /app/tetris\n");
  693.     printf("\ttrace +tsip -t 12\n");
  694. }
  695.  
  696. static display_mask_t parse_display_mask(char *text)
  697. {
  698.     display_mask_t dm;
  699.     char *c;
  700.  
  701.     c = text;
  702.  
  703.     while (*c) {
  704.         switch (*c) {
  705.         case 't': dm = dm | DM_THREAD; break;
  706.         case 's': dm = dm | DM_SYSCALL; break;
  707.         case 'i': dm = dm | DM_IPC; break;
  708.         case 'p': dm = dm | DM_SYSTEM | DM_USER; break;
  709.         default:
  710.             printf("Unexpected event type '%c'.\n", *c);
  711.             exit(1);
  712.         }
  713.  
  714.         ++c;
  715.     }
  716.  
  717.     return dm;
  718. }
  719.  
  720. static int parse_args(int argc, char *argv[])
  721. {
  722.     char *arg;
  723.     char *err_p;
  724.  
  725.     task_id = 0;
  726.  
  727.     --argc; ++argv;
  728.  
  729.     while (argc > 0) {
  730.         arg = *argv;
  731.         if (arg[0] == '+') {
  732.             display_mask = parse_display_mask(&arg[1]);
  733.         } else if (arg[0] == '-') {
  734.             if (arg[1] == 't') {
  735.                 /* Trace an already running task */
  736.                 --argc; ++argv;
  737.                 task_id = strtol(*argv, &err_p, 10);
  738.                 task_ldr = NULL;
  739.                 if (*err_p) {
  740.                     printf("Task ID syntax error\n");
  741.                     print_syntax();
  742.                     return -1;
  743.                 }
  744.             } else {
  745.                 printf("Uknown option '%s'\n", arg[0]);
  746.                 print_syntax();
  747.                 return -1;
  748.             }
  749.         } else {
  750.             break;
  751.         }
  752.  
  753.         --argc; ++argv;
  754.     }
  755.  
  756.     if (task_id != 0) {
  757.         if (argc == 0) return 0;
  758.         printf("Extra arguments\n");
  759.         print_syntax();
  760.         return -1;
  761.     }
  762.  
  763.     if (argc < 1) {
  764.         printf("Missing argument\n");
  765.         print_syntax();
  766.         return -1;
  767.     }
  768.  
  769.     /* Preload the specified program file. */
  770.     printf("Spawning '%s' with arguments:\n", *argv);
  771.     {
  772.         char **cp = argv;
  773.         while (*cp) printf("'%s'\n", *cp++);
  774.     }
  775.     task_ldr = preload_task(*argv, argv, &task_id);
  776.  
  777.     return 0;
  778. }
  779.  
  780. int main(int argc, char *argv[])
  781. {
  782.     int rc;
  783.  
  784.     printf("System Call / IPC Tracer\n");
  785.     printf("Controls: Q - Quit, P - Pause, R - Resume\n");
  786.  
  787.     display_mask = DM_THREAD | DM_SYSTEM | DM_USER;
  788.  
  789.     if (parse_args(argc, argv) < 0)
  790.         return 1;
  791.  
  792.     main_init();
  793.  
  794.     rc = connect_task(task_id);
  795.     if (rc < 0) {
  796.         printf("Failed connecting to task %lld.\n", task_id);
  797.         return 1;
  798.     }
  799.  
  800.     printf("Connected to task %lld.\n", task_id);
  801.  
  802.     if (task_ldr != NULL) {
  803.         program_run();
  804.     }
  805.  
  806.     trace_task(task_id);
  807.  
  808.     return 0;
  809. }
  810.  
  811. /** @}
  812.  */
  813.