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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 "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.  
  63. int next_thread_id;
  64.  
  65. int app_phone;
  66. volatile bool abort_debug;
  67.  
  68. volatile int paused;
  69.  
  70. breakpoint_t brk_list[MAX_BRKPTS];
  71. int lifted_brkpt;
  72.  
  73. fcv_t go_cv;
  74.  
  75. static void command_split(char *cmd_str)
  76. {
  77.     char *p = cmd_str;
  78.  
  79.     if (*p == '\0') {
  80.         cmd_argc = 0;
  81.         return;
  82.     }
  83.  
  84.     cmd_argc = 1;
  85.     cmd_argv[0] = p;
  86.  
  87.     while (*p != '\0') {
  88.         if (*p == ' ') {
  89.             cmd_argv[cmd_argc++] = p + 1;
  90.             *p = '\0';
  91.         }
  92.         ++p;
  93.     }
  94. }
  95.  
  96. static void command_run(void)
  97. {
  98.     int i;
  99.     int cmp_len;
  100.     int len;
  101.  
  102.     int idx_found;
  103.     int num_found;
  104.  
  105.     len = strlen(cmd_argv[0]);
  106.     cmp_len = 1;
  107.  
  108.     while (cmp_len <= len + 1) {
  109.  
  110.         num_found = 0;
  111.         i = 0;
  112.         while (cmd_table[i].name != NULL) {
  113.             if (strncmp(cmd_table[i].name, cmd_argv[0], cmp_len) == 0) {
  114.                 idx_found = i;
  115.                 ++num_found;
  116.             }
  117.             ++i;
  118.         }
  119.  
  120.         if (num_found < 2) break;
  121.  
  122.         --cmp_len;
  123.     }
  124.  
  125.     if (num_found == 0) {
  126.         cons_printf("Unknown command. Try one of:\n");
  127.         cmd_help(0, NULL);
  128.         return;
  129.     }
  130.  
  131.     if (cmd_argc - 1 != cmd_table[idx_found].argc) {
  132.         cons_printf("Command '%s' expects %d arguments\n",
  133.         cmd_table[idx_found].name, cmd_table[idx_found].argc);
  134.         return;
  135.     }
  136.  
  137.     (*cmd_table[idx_found].proc)(cmd_argc, cmd_argv);
  138. }
  139.  
  140. static void thread_stop(void)
  141. {
  142.     dthread_t *dt;
  143.     uintptr_t pc;
  144.  
  145.     dt = dthread_get();
  146.     pc = dthread_get_pc(dt);
  147.     cons_printf("[thread %d] stopped at 0x%lx\n", dt->id, pc);
  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. #define THASH_BUF_INIT_LENGTH 32
  187.  
  188. static int get_thread_list(thash_t **thash_buf_ptr, int *n)
  189. {
  190.     int rc;
  191.     int tb_copied;
  192.     int tb_needed;
  193.     int i;
  194.     size_t tb_size;
  195.     thash_t *thash_buf;
  196.  
  197.     tb_size = THASH_BUF_INIT_LENGTH * sizeof(thash_t);
  198.     thash_buf = malloc(tb_size);
  199.  
  200.     rc = udebug_thread_read(app_phone, (sysarg_t)thash_buf,
  201.         tb_size, &tb_copied, &tb_needed);
  202.     if (rc < 0) return rc;
  203.  
  204.     if (tb_needed > tb_size) {
  205.         /* Larger buffer needed  */
  206.  
  207.         free(thash_buf);
  208.  
  209.         tb_size = tb_needed;
  210.         thash_buf = malloc(tb_size);
  211.  
  212.         if (!thash_buf) {
  213.             printf("malloc failed\n");
  214.             exit(1);
  215.         }
  216.  
  217.         /* Try again */
  218.        
  219.         rc = udebug_thread_read(app_phone, (sysarg_t)thash_buf,
  220.             tb_size, &tb_copied, &tb_needed);
  221.  
  222.         if (rc < 0) return rc;
  223.     }
  224.  
  225.     *n = tb_copied / sizeof(thash_t);
  226.  
  227.     cons_printf("thread hashes:");
  228.  
  229.     for (i = 0; i < *n; ++i) {
  230.         cons_printf("0x%x\n", thash_buf[i]);
  231.     }
  232.  
  233.     cons_printf("Total of %u threads\n", *n);
  234.  
  235.     *thash_buf_ptr = thash_buf;
  236.  
  237.     return 0;
  238. }
  239.  
  240. void event_thread_b(unsigned hash)
  241. {
  242.     async_serialize_start();
  243.     cons_printf("new thread, hash 0x%x\n", hash);
  244.     async_serialize_end();
  245.  
  246.     thread_debug_start(hash);
  247. }
  248.  
  249. static unsigned buffer[1024];
  250.  
  251. static void debug_event(thash_t thash, udebug_event_t ev_type, sysarg_t val0)
  252. {
  253.     switch (ev_type) {
  254.     case UDEBUG_EVENT_STOP:
  255.         cons_printf("stop event\n");
  256.         thread_stop();
  257.         break;
  258.     case UDEBUG_EVENT_THREAD_B:
  259.         event_thread_b(val0);
  260.         break;
  261.     case UDEBUG_EVENT_THREAD_E:
  262.         cons_printf("thread 0x%x exited\n", val0);
  263.         abort_debug = true;
  264.         break;
  265.     case UDEBUG_EVENT_BREAKPOINT:
  266.         arch_event_breakpoint(thash);
  267.         break;
  268.     case UDEBUG_EVENT_TRAP:
  269.         arch_event_trap(thash);
  270.         break;
  271.     default:
  272.         cons_printf("unknown event type %d\n", ev_type);
  273.         break;
  274.     }
  275. }
  276.  
  277. void debug_loop(void *dt_arg)
  278. {
  279.     int rc;
  280.     udebug_event_t ev_type;
  281.     unsigned thread_buf_idx;
  282.     unsigned val0, val1;
  283.     dthread_t *dt;
  284.  
  285.     dt = (dthread_t *)dt_arg;
  286.  
  287.     cons_printf("debug_loop(%d)\n", dt->id);
  288.  
  289.     while (!abort_debug) {
  290.  
  291.         /* Run thread until an event occurs */
  292.         rc = udebug_go(app_phone, dt->hash, &ev_type, &val0, &val1);
  293.  
  294.         if (ev_type == UDEBUG_EVENT_FINISHED) {
  295.             cons_printf("thread %u debugging finished\n", dt->id);
  296.             break;
  297.         }
  298.         if (rc >= 0) debug_event(dt->hash, ev_type, val0);
  299.     }
  300.  
  301.     cons_printf("debug_loop(%d) exiting\n", dt->id);
  302. }
  303.  
  304. void thread_debug_start(unsigned thash)
  305. {
  306.     fid_t fid;
  307.     dthread_t *dt;
  308.  
  309.     dt = dthread_new(thash);
  310.  
  311.     fid = fibril_create(debug_loop, (void *)dt);
  312.     if (fid == 0) {
  313.         cons_printf("Warning: Failed creating fibril\n");
  314.     }
  315.     dt->fid = fid;
  316.  
  317.     fibril_add_ready(fid);
  318. }
  319.  
  320. void debug_active_task(void)
  321. {
  322.     int taskid;
  323.     int i;
  324.     int rc;
  325.     int c;
  326.  
  327.     thash_t *thash_buffer;
  328.     int n_threads;
  329.  
  330.     cons_printf("Breakpoint Debugger\n");
  331.     cons_printf("Press 'c' to connect\n");
  332.     while ((i = getchar()) != 'c')
  333.         putchar(i);
  334.  
  335.     taskid = 14;
  336.     rc = task_connect(taskid);
  337.     if (rc < 0) {
  338.         cons_printf("Failed to connect to task %d\n", taskid);
  339.         return;
  340.     }
  341.  
  342.     cons_printf("Connected to task %d\n", taskid);
  343.  
  344.     rc = get_thread_list(&thash_buffer, &n_threads);
  345.     if (rc < 0) {
  346.         cons_printf("Failed to get thread list\n", rc);
  347.         return;
  348.     }
  349.  
  350.     abort_debug = false;
  351.  
  352.     for (i = 0; i < n_threads; i++) {
  353.         thread_debug_start(thash_buffer[i]);
  354.     }
  355.  
  356.     while (!quit) {
  357.         cons_read_line(in_buf, IN_BUF_SIZE);
  358.         command_split(in_buf);
  359.         if (cmd_argc == 0) continue;
  360.  
  361.         command_run();
  362.     }
  363.  
  364.     cons_printf("terminate debugging session...\n");
  365.     abort_debug = true;
  366.     udebug_end(app_phone);
  367.     ipc_hangup(app_phone);
  368.  
  369.     cons_printf("done\n");
  370.     return;
  371. }
  372.  
  373. static void main_init(void)
  374. {
  375.     next_thread_id = 1;
  376.     paused = 0;
  377.    
  378.     list_initialize(&dthreads);
  379.     cwt = NULL;
  380.  
  381.     fcv_init(&go_cv);
  382. }
  383.  
  384. int main(void)
  385. {
  386.     main_init();
  387.  
  388.     while (1) {
  389.         debug_active_task();
  390.     }
  391. }
  392.  
  393. /** @}
  394.  */
  395.