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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 debug
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <stdio.h>
  36. #include <stdlib.h>
  37. #include <unistd.h>
  38. #include <syscall.h>
  39. #include <ipc/ipc.h>
  40. #include <fibril.h>
  41. #include <errno.h>
  42. #include <udebug.h>
  43. #include <async.h>
  44. #include <string.h>
  45.  
  46. #include "cmd.h"
  47. #include "include/arch.h"
  48. #include "main.h"
  49.  
  50. void thread_debug_start(unsigned thread_hash);
  51.  
  52. #define INBUF_SIZE 64
  53. char in_buf[INBUF_SIZE];
  54.  
  55. #define MAX_ARGC 10
  56. int cmd_argc;
  57. char *cmd_argv[MAX_ARGC + 1];   /* need one spare field for cmd_split() */
  58.  
  59. #define THBUF_SIZE 64
  60. thash_t thread_hash_buf[THBUF_SIZE];
  61. unsigned n_threads;
  62.  
  63. int next_thread_id;
  64.  
  65. int app_phone;
  66. volatile bool abort_debug;
  67.  
  68. thash_t thash;
  69. volatile int paused;
  70.  
  71. breakpoint_t brk_list[MAX_BRKPTS];
  72. int lifted_brkpt;
  73.  
  74. void read_line(char *buffer, int n)
  75. {
  76.     char c;
  77.     int i;
  78.  
  79.     i = 0;
  80.     while (i < n - 1) {
  81.         c = getchar();
  82.         if (c == '\n') break;
  83.         if (c == '\b') {
  84.             if (i > 0) {
  85.                 putchar('\b');
  86.                 --i;
  87.             }
  88.             continue;
  89.         }
  90.        
  91.         putchar(c);
  92.         buffer[i++] = c;
  93.     }
  94.  
  95.     putchar('\n');
  96.     buffer[i] = '\0';
  97. }
  98.  
  99. void command_split(char *cmd_str)
  100. {
  101.     char *p = cmd_str;
  102.  
  103.     if (*p == '\0') {
  104.         cmd_argc = 0;
  105.         return;
  106.     }
  107.  
  108.     cmd_argc = 1;
  109.     cmd_argv[0] = p;
  110.  
  111.     while (*p != '\0') {
  112.         if (*p == ' ') {
  113.             cmd_argv[cmd_argc++] = p + 1;
  114.             *p = '\0';
  115.         }
  116.         ++p;
  117.     }
  118. }
  119.  
  120. void command_run(void)
  121. {
  122.     int i;
  123.     int cmp_len;
  124.     int len;
  125.  
  126.     int idx_found;
  127.     int num_found;
  128.  
  129.     len = strlen(cmd_argv[0]);
  130.     cmp_len = 1;
  131.  
  132.     while (cmp_len <= len + 1) {
  133.  
  134.         num_found = 0;
  135.         i = 0;
  136.         while (cmd_table[i].name != NULL) {
  137.             if (strncmp(cmd_table[i].name, cmd_argv[0], cmp_len) == 0) {
  138.                 idx_found = i;
  139.                 ++num_found;
  140.             }
  141.             ++i;
  142.         }
  143.  
  144.         if (num_found < 2) break;
  145.  
  146.         --cmp_len;
  147.     }
  148.  
  149.     if (num_found == 0) {
  150.         printf("Unknown command. Try one of:\n");
  151.         cmd_help(0, NULL);
  152.         return;
  153.     }
  154.  
  155.     if (cmd_argc - 1 != cmd_table[idx_found].argc) {
  156.         printf("Command '%s' expects %d arguments\n",
  157.         cmd_table[idx_found].name, cmd_table[idx_found].argc);
  158.         return;
  159.     }
  160.  
  161.     (*cmd_table[idx_found].proc)(cmd_argc, cmd_argv);
  162. }
  163.  
  164.  
  165. int task_connect(int taskid)
  166. {
  167.     int rc;
  168.     unsigned evmask;
  169.  
  170.     printf("ipc_connect_kbox(%d)... ", taskid);
  171.     rc = ipc_connect_kbox(taskid);
  172.     printf("-> %d\n", rc);
  173.     app_phone = rc;
  174.     if (rc < 0) return rc;
  175.  
  176.     printf("udebug_begin()... ");
  177.     rc = udebug_begin(app_phone);
  178.     printf("-> %d\n", rc);
  179.     if (rc < 0) return rc;
  180.  
  181.     evmask = UDEBUG_EM_ALL & ~(UDEBUG_EM_SYSCALL_B | UDEBUG_EM_SYSCALL_E);
  182.     printf("udebug_set_evmask(0x%x)... ", evmask);
  183.     rc = udebug_set_evmask(app_phone, evmask);
  184.     printf("-> %d\n", rc);
  185.     if (rc < 0) return rc;
  186.  
  187.     return 0;
  188. }
  189.  
  190. int get_thread_list(void)
  191. {
  192.     int rc;
  193.     int tb_copied;
  194.     int tb_needed;
  195.     int i;
  196.  
  197.     printf("send IPC_M_DEBUG_THREAD_READ message\n");
  198.     rc = udebug_thread_read(app_phone, (unsigned)thread_hash_buf,
  199.         THBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);
  200.     printf("-> %d\n", rc);
  201.     if (rc < 0) return rc;
  202.  
  203.     n_threads = tb_copied / sizeof(unsigned);
  204.  
  205.     printf("thread IDs:");
  206.     for (i=0; i<n_threads; i++) {
  207.         printf(" %u", thread_hash_buf[i]);
  208.     }
  209.     printf("\ntotal of %u threads\n", tb_needed/sizeof(unsigned));
  210.  
  211.     return 0;
  212. }
  213.  
  214. void event_thread_b(unsigned hash)
  215. {
  216.     async_serialize_start();
  217.     printf("new thread, hash 0x%x\n", hash);
  218.     async_serialize_end();
  219.  
  220.     thread_debug_start(hash);
  221. }
  222.  
  223. static unsigned buffer[1024];
  224.  
  225. static void debug_event(thash_t thash, udebug_event_t ev_type, sysarg_t val0)
  226. {
  227.     switch (ev_type) {
  228.     case UDEBUG_EVENT_STOP:
  229.         printf("stop event\n");
  230.         printf("waiting for resume\n");
  231.         while (paused) {
  232.             usleep(1000000);
  233.             fibril_yield();
  234.             printf(".");
  235.         }
  236.         printf("resumed\n");
  237.         break;
  238.     case UDEBUG_EVENT_THREAD_B:
  239.         event_thread_b(val0);
  240.         break;
  241.     case UDEBUG_EVENT_THREAD_E:
  242.         printf("thread 0x%x exited\n", val0);
  243.         abort_debug = true;
  244.         break;
  245.     case UDEBUG_EVENT_BREAKPOINT:
  246.         arch_event_breakpoint(thash);
  247.         break;
  248.     case UDEBUG_EVENT_TRAP:
  249.         arch_event_trap(thash);
  250.         break;
  251.     default:
  252.         printf("unknown event type %d\n", ev_type);
  253.         break;
  254.     }
  255. }
  256.  
  257. void debug_loop(void *thread_hash_arg)
  258. {
  259.     int rc;
  260.     udebug_event_t ev_type;
  261.     unsigned thread_hash;
  262.     unsigned thread_id;
  263.     unsigned val0, val1;
  264.  
  265.     thread_hash = (unsigned)thread_hash_arg;
  266.     thread_id = next_thread_id++;
  267.  
  268.     printf("debug_loop(%d)\n", thread_id); 
  269.  
  270.     while (!abort_debug) {
  271.  
  272.         printf("go\n");
  273.         /* Run thread until an event occurs */
  274.         rc = udebug_go(app_phone, thread_hash,
  275.             &ev_type, &val0, &val1);
  276.  
  277.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  278.             printf("thread %u debugging finished\n", thread_id);
  279.             break;
  280.         }
  281.  
  282.         if (rc >= 0) debug_event(thread_hash, ev_type, val0);
  283.     }
  284.  
  285.     printf("debug_loop(%d) exiting\n", thread_id);
  286. }
  287.  
  288. void thread_debug_start(unsigned thread_hash)
  289. {
  290.     fid_t fid;
  291.  
  292.     thash = thread_hash;
  293.  
  294.     fid = fibril_create(debug_loop, (void *)thread_hash);
  295.     if (fid == 0) {
  296.         printf("Warning: Failed creating fibril\n");
  297.     }
  298.     fibril_add_ready(fid);
  299. }
  300.  
  301. void debug_active_task(void)
  302. {
  303.     int taskid;
  304.     int i;
  305.     int rc;
  306.     int c;
  307.  
  308.     printf("Breakpoint Debugger\n");
  309.     printf("Press 'c' to connect\n");
  310.     while ((i = getchar()) != 'c')
  311.         putchar(i);
  312.  
  313.     taskid = 13;
  314.     rc = task_connect(taskid);
  315.     if (rc < 0) {
  316.         printf("Failed to connect to task %d\n", taskid);
  317.         return;
  318.     }
  319.  
  320.     printf("Connected to task %d\n", taskid);
  321.  
  322.     rc = get_thread_list();
  323.     if (rc < 0) {
  324.         printf("Failed to get thread list (error %d)\n", rc);
  325.         return;
  326.     }
  327.  
  328.     abort_debug = false;
  329.  
  330.     for (i = 0; i < n_threads; i++) {
  331.         thread_debug_start(thread_hash_buf[i]);
  332.     }
  333.  
  334.     while (!quit) {
  335.         printf("> ");
  336.         read_line(in_buf, INBUF_SIZE);
  337.         command_split(in_buf);
  338.         if (cmd_argc == 0) continue;
  339.  
  340.         command_run();
  341.     }
  342.  
  343.     printf("terminate debugging session...\n");
  344.     abort_debug = true;
  345.     udebug_end(app_phone);
  346.     ipc_hangup(app_phone);
  347.  
  348.     printf("done\n");
  349.     return;
  350. }
  351.  
  352. static void main_init(void)
  353. {
  354.     next_thread_id = 1;
  355.     paused = 0;
  356. }
  357.  
  358. int main(void)
  359. {
  360.     main_init();
  361.  
  362.     while (1) {
  363.         debug_active_task();
  364.     }
  365. }
  366.  
  367. /** @}
  368.  */
  369.