Subversion Repositories HelenOS

Rev

Rev 2938 | Rev 2940 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  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 "cons.h"
  48. #include "dthread.h"
  49. #include "include/arch.h"
  50. #include "fib_synch.h"
  51. #include "main.h"
  52.  
  53. void thread_debug_start(unsigned thread_hash);
  54.  
  55. #define IN_BUF_SIZE 64
  56. static char in_buf[IN_BUF_SIZE];
  57.  
  58. #define MAX_ARGC 10
  59. int cmd_argc;
  60. char *cmd_argv[MAX_ARGC + 1];   /* need one spare field for cmd_split() */
  61.  
  62. #define THBUF_SIZE 64
  63. thash_t thread_hash_buf[THBUF_SIZE];
  64.  
  65. int next_thread_id;
  66.  
  67. int app_phone;
  68. volatile bool abort_debug;
  69.  
  70. volatile int paused;
  71.  
  72. breakpoint_t brk_list[MAX_BRKPTS];
  73. int lifted_brkpt;
  74.  
  75. fcv_t go_cv;
  76.  
  77. static void command_split(char *cmd_str)
  78. {
  79.     char *p = cmd_str;
  80.  
  81.     if (*p == '\0') {
  82.         cmd_argc = 0;
  83.         return;
  84.     }
  85.  
  86.     cmd_argc = 1;
  87.     cmd_argv[0] = p;
  88.  
  89.     while (*p != '\0') {
  90.         if (*p == ' ') {
  91.             cmd_argv[cmd_argc++] = p + 1;
  92.             *p = '\0';
  93.         }
  94.         ++p;
  95.     }
  96. }
  97.  
  98. static void command_run(void)
  99. {
  100.     int i;
  101.     int cmp_len;
  102.     int len;
  103.  
  104.     int idx_found;
  105.     int num_found;
  106.  
  107.     len = strlen(cmd_argv[0]);
  108.     cmp_len = 1;
  109.  
  110.     while (cmp_len <= len + 1) {
  111.  
  112.         num_found = 0;
  113.         i = 0;
  114.         while (cmd_table[i].name != NULL) {
  115.             if (strncmp(cmd_table[i].name, cmd_argv[0], cmp_len) == 0) {
  116.                 idx_found = i;
  117.                 ++num_found;
  118.             }
  119.             ++i;
  120.         }
  121.  
  122.         if (num_found < 2) break;
  123.  
  124.         --cmp_len;
  125.     }
  126.  
  127.     if (num_found == 0) {
  128.         cons_printf("Unknown command. Try one of:\n");
  129.         cmd_help(0, NULL);
  130.         return;
  131.     }
  132.  
  133.     if (cmd_argc - 1 != cmd_table[idx_found].argc) {
  134.         cons_printf("Command '%s' expects %d arguments\n",
  135.         cmd_table[idx_found].name, cmd_table[idx_found].argc);
  136.         return;
  137.     }
  138.  
  139.     (*cmd_table[idx_found].proc)(cmd_argc, cmd_argv);
  140. }
  141.  
  142. static void thread_stop(void)
  143. {
  144.     dthread_t *dt;
  145.  
  146.     dt = dthread_get();
  147.     cons_printf("[thread %d] stopped\n", dt->id);
  148.     dthread_stop_me();
  149.     cons_printf("[thread %d] go\n", dt->id);
  150. }
  151.  
  152. /*
  153.  * Called by a fibril (from arch code) when a breakpoint is hit.
  154.  */
  155. void breakpoint_hit(void)
  156. {
  157.     cons_printf("breakpoint hit\n");
  158.     thread_stop();
  159. }
  160.  
  161. static int task_connect(int taskid)
  162. {
  163.     int rc;
  164.     unsigned evmask;
  165.  
  166.     cons_printf("ipc_connect_kbox(%d)... ", taskid);
  167.     rc = ipc_connect_kbox(taskid);
  168.     cons_printf("-> %d\n", rc);
  169.     app_phone = rc;
  170.     if (rc < 0) return rc;
  171.  
  172.     cons_printf("udebug_begin()... ");
  173.     rc = udebug_begin(app_phone);
  174.     cons_printf("-> %d\n", rc);
  175.     if (rc < 0) return rc;
  176.  
  177.     evmask = UDEBUG_EM_ALL & ~(UDEBUG_EM_SYSCALL_B | UDEBUG_EM_SYSCALL_E);
  178.     cons_printf("udebug_set_evmask(0x%x)... ", evmask);
  179.     rc = udebug_set_evmask(app_phone, evmask);
  180.     cons_printf("-> %d\n", rc);
  181.     if (rc < 0) return rc;
  182.  
  183.     return 0;
  184. }
  185.  
  186. static int get_thread_list(void)
  187. {
  188.     int rc;
  189.     int tb_copied;
  190.     int tb_needed;
  191.     int i;
  192.     int n;
  193.  
  194.     cons_printf("send IPC_M_DEBUG_THREAD_READ message\n");
  195.     rc = udebug_thread_read(app_phone, (unsigned)thread_hash_buf,
  196.         THBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);
  197.     cons_printf("-> %d\n", rc);
  198.     if (rc < 0) return rc;
  199.  
  200.     n = tb_copied / sizeof(unsigned);
  201.  
  202.     cons_printf("thread IDs:");
  203.     for (i=0; i<n; i++) {
  204.         cons_printf(" %u", thread_hash_buf[i]);
  205.     }
  206.     cons_printf("\ntotal of %u threads\n", tb_needed/sizeof(unsigned));
  207.  
  208.     return n;
  209. }
  210.  
  211. void event_thread_b(unsigned hash)
  212. {
  213.     async_serialize_start();
  214.     cons_printf("new thread, hash 0x%x\n", hash);
  215.     async_serialize_end();
  216.  
  217.     thread_debug_start(hash);
  218. }
  219.  
  220. static unsigned buffer[1024];
  221.  
  222. static void debug_event(thash_t thash, udebug_event_t ev_type, sysarg_t val0)
  223. {
  224.     switch (ev_type) {
  225.     case UDEBUG_EVENT_STOP:
  226.         cons_printf("stop event\n");
  227.         thread_stop();
  228.         break;
  229.     case UDEBUG_EVENT_THREAD_B:
  230.         event_thread_b(val0);
  231.         break;
  232.     case UDEBUG_EVENT_THREAD_E:
  233.         cons_printf("thread 0x%x exited\n", val0);
  234.         abort_debug = true;
  235.         break;
  236.     case UDEBUG_EVENT_BREAKPOINT:
  237.         arch_event_breakpoint(thash);
  238.         break;
  239.     case UDEBUG_EVENT_TRAP:
  240.         arch_event_trap(thash);
  241.         break;
  242.     default:
  243.         cons_printf("unknown event type %d\n", ev_type);
  244.         break;
  245.     }
  246. }
  247.  
  248. void debug_loop(void *dt_arg)
  249. {
  250.     int rc;
  251.     udebug_event_t ev_type;
  252.     unsigned thread_buf_idx;
  253.     unsigned val0, val1;
  254.     dthread_t *dt;
  255.  
  256.     dt = (dthread_t *)dt_arg;
  257.  
  258.     cons_printf("debug_loop(%d)\n", dt->id);
  259.  
  260.     while (!abort_debug) {
  261.  
  262.         /* Run thread until an event occurs */
  263.         rc = udebug_go(app_phone, dt->hash, &ev_type, &val0, &val1);
  264.  
  265.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  266.             cons_printf("thread %u debugging finished\n", dt->id);
  267.             break;
  268.         }
  269.         if (rc >= 0) debug_event(dt->hash, ev_type, val0);
  270.     }
  271.  
  272.     cons_printf("debug_loop(%d) exiting\n", dt->id);
  273. }
  274.  
  275. void thread_debug_start(unsigned thash)
  276. {
  277.     fid_t fid;
  278.     dthread_t *dt;
  279.  
  280.     dt = dthread_new(thash);
  281.  
  282.     fid = fibril_create(debug_loop, (void *)dt);
  283.     if (fid == 0) {
  284.         cons_printf("Warning: Failed creating fibril\n");
  285.     }
  286.     dt->fid = fid;
  287.  
  288.     fibril_add_ready(fid);
  289. }
  290.  
  291. void debug_active_task(void)
  292. {
  293.     int taskid;
  294.     int i;
  295.     int rc;
  296.     int c;
  297.  
  298.     cons_printf("Breakpoint Debugger\n");
  299.     cons_printf("Press 'c' to connect\n");
  300.     while ((i = getchar()) != 'c')
  301.         putchar(i);
  302.  
  303.     taskid = 14;
  304.     rc = task_connect(taskid);
  305.     if (rc < 0) {
  306.         cons_printf("Failed to connect to task %d\n", taskid);
  307.         return;
  308.     }
  309.  
  310.     cons_printf("Connected to task %d\n", taskid);
  311.  
  312.     rc = get_thread_list();
  313.     if (rc < 0) {
  314.         cons_printf("Failed to get thread list (error %d)\n", rc);
  315.         return;
  316.     }
  317.  
  318.     abort_debug = false;
  319.  
  320.     for (i = 0; i < rc; i++) {
  321.         thread_debug_start(thread_hash_buf[i]);
  322.     }
  323.  
  324.     while (!quit) {
  325.         cons_read_line(in_buf, IN_BUF_SIZE);
  326.         command_split(in_buf);
  327.         if (cmd_argc == 0) continue;
  328.  
  329.         command_run();
  330.     }
  331.  
  332.     cons_printf("terminate debugging session...\n");
  333.     abort_debug = true;
  334.     udebug_end(app_phone);
  335.     ipc_hangup(app_phone);
  336.  
  337.     cons_printf("done\n");
  338.     return;
  339. }
  340.  
  341. static void main_init(void)
  342. {
  343.     next_thread_id = 1;
  344.     paused = 0;
  345.    
  346.     list_initialize(&dthreads);
  347.     cwt = NULL;
  348.  
  349.     fcv_init(&go_cv);
  350. }
  351.  
  352. int main(void)
  353. {
  354.     main_init();
  355.  
  356.     while (1) {
  357.         debug_active_task();
  358.     }
  359. }
  360.  
  361. /** @}
  362.  */
  363.