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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 "fib_synch.h"
  49. #include "main.h"
  50.  
  51. void thread_debug_start(unsigned thread_hash);
  52.  
  53. #define INBUF_SIZE 64
  54. char in_buf[INBUF_SIZE];
  55.  
  56. #define MAX_ARGC 10
  57. int cmd_argc;
  58. char *cmd_argv[MAX_ARGC + 1];   /* need one spare field for cmd_split() */
  59.  
  60. #define THBUF_SIZE 64
  61. thash_t thread_hash_buf[THBUF_SIZE];
  62. unsigned n_threads;
  63.  
  64. int next_thread_id;
  65.  
  66. int app_phone;
  67. volatile bool abort_debug;
  68.  
  69. thash_t thash;
  70. volatile int paused;
  71.  
  72. breakpoint_t brk_list[MAX_BRKPTS];
  73. int lifted_brkpt;
  74.  
  75. fcv_t go_cv;
  76.  
  77. void read_line(char *buffer, int n)
  78. {
  79.     char c;
  80.     int i;
  81.  
  82.     i = 0;
  83.     while (i < n - 1) {
  84.         c = getchar();
  85.         if (c == '\n') break;
  86.         if (c == '\b') {
  87.             if (i > 0) {
  88.                 putchar('\b');
  89.                 --i;
  90.             }
  91.             continue;
  92.         }
  93.        
  94.         putchar(c);
  95.         buffer[i++] = c;
  96.     }
  97.  
  98.     putchar('\n');
  99.     buffer[i] = '\0';
  100. }
  101.  
  102. void command_split(char *cmd_str)
  103. {
  104.     char *p = cmd_str;
  105.  
  106.     if (*p == '\0') {
  107.         cmd_argc = 0;
  108.         return;
  109.     }
  110.  
  111.     cmd_argc = 1;
  112.     cmd_argv[0] = p;
  113.  
  114.     while (*p != '\0') {
  115.         if (*p == ' ') {
  116.             cmd_argv[cmd_argc++] = p + 1;
  117.             *p = '\0';
  118.         }
  119.         ++p;
  120.     }
  121. }
  122.  
  123. void command_run(void)
  124. {
  125.     int i;
  126.     int cmp_len;
  127.     int len;
  128.  
  129.     int idx_found;
  130.     int num_found;
  131.  
  132.     len = strlen(cmd_argv[0]);
  133.     cmp_len = 1;
  134.  
  135.     while (cmp_len <= len + 1) {
  136.  
  137.         num_found = 0;
  138.         i = 0;
  139.         while (cmd_table[i].name != NULL) {
  140.             if (strncmp(cmd_table[i].name, cmd_argv[0], cmp_len) == 0) {
  141.                 idx_found = i;
  142.                 ++num_found;
  143.             }
  144.             ++i;
  145.         }
  146.  
  147.         if (num_found < 2) break;
  148.  
  149.         --cmp_len;
  150.     }
  151.  
  152.     if (num_found == 0) {
  153.         printf("Unknown command. Try one of:\n");
  154.         cmd_help(0, NULL);
  155.         return;
  156.     }
  157.  
  158.     if (cmd_argc - 1 != cmd_table[idx_found].argc) {
  159.         printf("Command '%s' expects %d arguments\n",
  160.         cmd_table[idx_found].name, cmd_table[idx_found].argc);
  161.         return;
  162.     }
  163.  
  164.     (*cmd_table[idx_found].proc)(cmd_argc, cmd_argv);
  165. }
  166.  
  167. /*
  168.  * Called by a fibril (from arch code) when a breakpoint is hit.
  169.  */
  170. void breakpoint_hit(void)
  171. {
  172.     fcv_wait(&go_cv);
  173. }
  174.  
  175. int task_connect(int taskid)
  176. {
  177.     int rc;
  178.     unsigned evmask;
  179.  
  180.     printf("ipc_connect_kbox(%d)... ", taskid);
  181.     rc = ipc_connect_kbox(taskid);
  182.     printf("-> %d\n", rc);
  183.     app_phone = rc;
  184.     if (rc < 0) return rc;
  185.  
  186.     printf("udebug_begin()... ");
  187.     rc = udebug_begin(app_phone);
  188.     printf("-> %d\n", rc);
  189.     if (rc < 0) return rc;
  190.  
  191.     evmask = UDEBUG_EM_ALL & ~(UDEBUG_EM_SYSCALL_B | UDEBUG_EM_SYSCALL_E);
  192.     printf("udebug_set_evmask(0x%x)... ", evmask);
  193.     rc = udebug_set_evmask(app_phone, evmask);
  194.     printf("-> %d\n", rc);
  195.     if (rc < 0) return rc;
  196.  
  197.     return 0;
  198. }
  199.  
  200. int get_thread_list(void)
  201. {
  202.     int rc;
  203.     int tb_copied;
  204.     int tb_needed;
  205.     int i;
  206.  
  207.     printf("send IPC_M_DEBUG_THREAD_READ message\n");
  208.     rc = udebug_thread_read(app_phone, (unsigned)thread_hash_buf,
  209.         THBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);
  210.     printf("-> %d\n", rc);
  211.     if (rc < 0) return rc;
  212.  
  213.     n_threads = tb_copied / sizeof(unsigned);
  214.  
  215.     printf("thread IDs:");
  216.     for (i=0; i<n_threads; i++) {
  217.         printf(" %u", thread_hash_buf[i]);
  218.     }
  219.     printf("\ntotal of %u threads\n", tb_needed/sizeof(unsigned));
  220.  
  221.     return 0;
  222. }
  223.  
  224. void event_thread_b(unsigned hash)
  225. {
  226.     async_serialize_start();
  227.     printf("new thread, hash 0x%x\n", hash);
  228.     async_serialize_end();
  229.  
  230.     thread_debug_start(hash);
  231. }
  232.  
  233. static unsigned buffer[1024];
  234.  
  235. static void debug_event(thash_t thash, udebug_event_t ev_type, sysarg_t val0)
  236. {
  237.     switch (ev_type) {
  238.     case UDEBUG_EVENT_STOP:
  239.         printf("stop event\n");
  240.         printf("waiting for resume\n");
  241.         while (paused) {
  242.             usleep(1000000);
  243.             fibril_yield();
  244.             printf(".");
  245.         }
  246.         printf("resumed\n");
  247.         break;
  248.     case UDEBUG_EVENT_THREAD_B:
  249.         event_thread_b(val0);
  250.         break;
  251.     case UDEBUG_EVENT_THREAD_E:
  252.         printf("thread 0x%x exited\n", val0);
  253.         abort_debug = true;
  254.         break;
  255.     case UDEBUG_EVENT_BREAKPOINT:
  256.         arch_event_breakpoint(thash);
  257.         break;
  258.     case UDEBUG_EVENT_TRAP:
  259.         arch_event_trap(thash);
  260.         break;
  261.     default:
  262.         printf("unknown event type %d\n", ev_type);
  263.         break;
  264.     }
  265. }
  266.  
  267. void debug_loop(void *thread_hash_arg)
  268. {
  269.     int rc;
  270.     udebug_event_t ev_type;
  271.     unsigned thread_hash;
  272.     unsigned thread_id;
  273.     unsigned val0, val1;
  274.  
  275.     thread_hash = (unsigned)thread_hash_arg;
  276.     thread_id = next_thread_id++;
  277.  
  278.     printf("debug_loop(%d)\n", thread_id); 
  279.  
  280.     while (!abort_debug) {
  281.  
  282.         printf("[t%d] go...\n", thread_id);
  283.         /* Run thread until an event occurs */
  284.         rc = udebug_go(app_phone, thread_hash,
  285.             &ev_type, &val0, &val1);
  286.         printf("[t%d] stopped\n", thread_id);
  287.  
  288.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  289.             printf("thread %u debugging finished\n", thread_id);
  290.             break;
  291.         }
  292.         if (rc >= 0) debug_event(thread_hash, ev_type, val0);
  293.     }
  294.  
  295.     printf("debug_loop(%d) exiting\n", thread_id);
  296. }
  297.  
  298. void thread_debug_start(unsigned thread_hash)
  299. {
  300.     fid_t fid;
  301.  
  302.     thash = thread_hash;
  303.  
  304.     fid = fibril_create(debug_loop, (void *)thread_hash);
  305.     if (fid == 0) {
  306.         printf("Warning: Failed creating fibril\n");
  307.     }
  308.     fibril_add_ready(fid);
  309. }
  310.  
  311. void debug_active_task(void)
  312. {
  313.     int taskid;
  314.     int i;
  315.     int rc;
  316.     int c;
  317.  
  318.     printf("Breakpoint Debugger\n");
  319.     printf("Press 'c' to connect\n");
  320.     while ((i = getchar()) != 'c')
  321.         putchar(i);
  322.  
  323.     taskid = 14;
  324.     rc = task_connect(taskid);
  325.     if (rc < 0) {
  326.         printf("Failed to connect to task %d\n", taskid);
  327.         return;
  328.     }
  329.  
  330.     printf("Connected to task %d\n", taskid);
  331.  
  332.     rc = get_thread_list();
  333.     if (rc < 0) {
  334.         printf("Failed to get thread list (error %d)\n", rc);
  335.         return;
  336.     }
  337.  
  338.     abort_debug = false;
  339.  
  340.     for (i = 0; i < n_threads; i++) {
  341.         thread_debug_start(thread_hash_buf[i]);
  342.     }
  343.  
  344.     while (!quit) {
  345.         printf("> ");
  346.         read_line(in_buf, INBUF_SIZE);
  347.         command_split(in_buf);
  348.         if (cmd_argc == 0) continue;
  349.  
  350.         command_run();
  351.     }
  352.  
  353.     printf("terminate debugging session...\n");
  354.     abort_debug = true;
  355.     udebug_end(app_phone);
  356.     ipc_hangup(app_phone);
  357.  
  358.     printf("done\n");
  359.     return;
  360. }
  361.  
  362. static void main_init(void)
  363. {
  364.     next_thread_id = 1;
  365.     paused = 0;
  366.  
  367.     fcv_init(&go_cv);
  368. }
  369.  
  370. int main(void)
  371. {
  372.     main_init();
  373.  
  374.     while (1) {
  375.         debug_active_task();
  376.     }
  377. }
  378.  
  379. /** @}
  380.  */
  381.