source: mainline/uspace/app/trace/trace.c@ c2ad500

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since c2ad500 was 4470e26, checked in by Jiri Svoboda <jirik.svoboda@…>, 17 years ago

Separate load and run commands for loader. Update tracer - no events get missed on startup anymore.
  • Property mode set to 100644
File size: 16.7 KB
Line 
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 <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 <task.h>
45#include <loader/loader.h>
46
47// Temporary: service and method names
48#include "proto.h"
49#include <ipc/services.h>
50#include "../../srv/vfs/vfs.h"
51#include "../../srv/console/console.h"
52
53#include "syscalls.h"
54#include "ipcp.h"
55#include "errors.h"
56#include "trace.h"
57
58#define THBUF_SIZE 64
59uintptr_t thread_hash_buf[THBUF_SIZE];
60int n_threads;
61
62int next_thread_id;
63
64int phoneid;
65int abort_trace;
66
67uintptr_t thash;
68volatile int paused;
69
70void thread_trace_start(uintptr_t thread_hash);
71
72static proto_t *proto_console;
73static task_id_t task_id;
74static loader_t *task_ldr;
75
76/** Combination of events/data to print. */
77display_mask_t display_mask;
78
79static int program_run_fibril(void *arg);
80
81static void program_run(void)
82{
83 fid_t fid;
84
85 fid = fibril_create(program_run_fibril, NULL);
86 if (fid == 0) {
87 printf("Error creating fibril\n");
88 exit(1);
89 }
90
91 fibril_add_ready(fid);
92}
93
94static int program_run_fibril(void *arg)
95{
96 int rc;
97
98 /*
99 * This must be done in background as it will block until
100 * we let the task reply to this call.
101 */
102 rc = loader_run(task_ldr);
103 if (rc != 0) {
104 printf("Error running program\n");
105 exit(1);
106 }
107
108 free(task_ldr);
109 task_ldr = NULL;
110
111 printf("program_run_fibril exiting\n");
112 return 0;
113}
114
115
116static int connect_task(task_id_t task_id)
117{
118 int rc;
119
120 rc = ipc_connect_kbox(task_id);
121
122 if (rc == ENOTSUP) {
123 printf("You do not have userspace debugging support "
124 "compiled in the kernel.\n");
125 printf("Compile kernel with 'Support for userspace debuggers' "
126 "(CONFIG_UDEBUG) enabled.\n");
127 return rc;
128 }
129
130 if (rc < 0) {
131 printf("Error connecting\n");
132 printf("ipc_connect_task(%lld) -> %d ", task_id, rc);
133 return rc;
134 }
135
136 phoneid = rc;
137
138 rc = udebug_begin(phoneid);
139 if (rc < 0) {
140 printf("udebug_begin() -> %d\n", rc);
141 return rc;
142 }
143
144 rc = udebug_set_evmask(phoneid, UDEBUG_EM_ALL);
145 if (rc < 0) {
146 printf("udebug_set_evmask(0x%x) -> %d\n ", UDEBUG_EM_ALL, rc);
147 return rc;
148 }
149
150 return 0;
151}
152
153static int get_thread_list(void)
154{
155 int rc;
156 size_t tb_copied;
157 size_t tb_needed;
158 int i;
159
160 rc = udebug_thread_read(phoneid, thread_hash_buf,
161 THBUF_SIZE*sizeof(unsigned), &tb_copied, &tb_needed);
162 if (rc < 0) {
163 printf("udebug_thread_read() -> %d\n", rc);
164 return rc;
165 }
166
167 n_threads = tb_copied / sizeof(uintptr_t);
168
169 printf("Threads:");
170 for (i = 0; i < n_threads; i++) {
171 printf(" [%d] (hash 0x%lx)", 1+i, thread_hash_buf[i]);
172 }
173 printf("\ntotal of %u threads\n", tb_needed / sizeof(uintptr_t));
174
175 return 0;
176}
177
178void val_print(sysarg_t val, val_type_t v_type)
179{
180 switch (v_type) {
181 case V_VOID:
182 printf("<void>");
183 break;
184
185 case V_INTEGER:
186 printf("%ld", val);
187 break;
188
189 case V_HASH:
190 case V_PTR:
191 printf("0x%08lx", val);
192 break;
193
194 case V_ERRNO:
195 if (val >= -15 && val <= 0) {
196 printf("%ld %s (%s)", val,
197 err_desc[-val].name,
198 err_desc[-val].desc);
199 } else {
200 printf("%ld", val);
201 }
202 break;
203 case V_INT_ERRNO:
204 if (val >= -15 && val < 0) {
205 printf("%ld %s (%s)", val,
206 err_desc[-val].name,
207 err_desc[-val].desc);
208 } else {
209 printf("%ld", val);
210 }
211 break;
212
213 case V_CHAR:
214 if (val >= 0x20 && val < 0x7f) {
215 printf("'%c'", val);
216 } else {
217 switch (val) {
218 case '\a': printf("'\\a'"); break;
219 case '\b': printf("'\\b'"); break;
220 case '\n': printf("'\\n'"); break;
221 case '\r': printf("'\\r'"); break;
222 case '\t': printf("'\\t'"); break;
223 case '\\': printf("'\\\\'"); break;
224 default: printf("'\\x%02lX'", val); break;
225 }
226 }
227 break;
228 }
229}
230
231
232static void print_sc_retval(sysarg_t retval, val_type_t val_type)
233{
234 printf(" -> ");
235 val_print(retval, val_type);
236 putchar('\n');
237}
238
239static void print_sc_args(sysarg_t *sc_args, int n)
240{
241 int i;
242
243 putchar('(');
244 if (n > 0) printf("%ld", sc_args[0]);
245 for (i = 1; i < n; i++) {
246 printf(", %ld", sc_args[i]);
247 }
248 putchar(')');
249}
250
251static void sc_ipc_call_async_fast(sysarg_t *sc_args, sysarg_t sc_rc)
252{
253 ipc_call_t call;
254 ipcarg_t phoneid;
255
256 if (sc_rc == IPC_CALLRET_FATAL || sc_rc == IPC_CALLRET_TEMPORARY)
257 return;
258
259 phoneid = sc_args[0];
260
261 IPC_SET_METHOD(call, sc_args[1]);
262 IPC_SET_ARG1(call, sc_args[2]);
263 IPC_SET_ARG2(call, sc_args[3]);
264 IPC_SET_ARG3(call, sc_args[4]);
265 IPC_SET_ARG4(call, sc_args[5]);
266 IPC_SET_ARG5(call, 0);
267
268 ipcp_call_out(phoneid, &call, sc_rc);
269}
270
271static void sc_ipc_call_async_slow(sysarg_t *sc_args, sysarg_t sc_rc)
272{
273 ipc_call_t call;
274 int rc;
275
276 if (sc_rc == IPC_CALLRET_FATAL || sc_rc == IPC_CALLRET_TEMPORARY)
277 return;
278
279 memset(&call, 0, sizeof(call));
280 rc = udebug_mem_read(phoneid, &call.args, sc_args[1], sizeof(call.args));
281
282 if (rc >= 0) {
283 ipcp_call_out(sc_args[0], &call, sc_rc);
284 }
285}
286
287static void sc_ipc_call_sync_fast(sysarg_t *sc_args)
288{
289 ipc_call_t question, reply;
290 int rc;
291 int phoneidx;
292
293// printf("sc_ipc_call_sync_fast()\n");
294 phoneidx = sc_args[0];
295
296 IPC_SET_METHOD(question, sc_args[1]);
297 IPC_SET_ARG1(question, sc_args[2]);
298 IPC_SET_ARG2(question, sc_args[3]);
299 IPC_SET_ARG3(question, sc_args[4]);
300 IPC_SET_ARG4(question, 0);
301 IPC_SET_ARG5(question, 0);
302
303// printf("memset\n");
304 memset(&reply, 0, sizeof(reply));
305// printf("udebug_mem_read(phone=%d, buffer_ptr=%u, src_addr=%d, n=%d\n",
306// phoneid, &reply.args, sc_args[5], sizeof(reply.args));
307 rc = udebug_mem_read(phoneid, &reply.args, sc_args[5], sizeof(reply.args));
308// printf("dmr->%d\n", rc);
309 if (rc < 0) return;
310
311// printf("call ipc_call_sync\n");
312 ipcp_call_sync(phoneidx, &question, &reply);
313}
314
315static void sc_ipc_call_sync_slow(sysarg_t *sc_args)
316{
317 ipc_call_t question, reply;
318 int rc;
319
320 memset(&question, 0, sizeof(question));
321 rc = udebug_mem_read(phoneid, &question.args, sc_args[1], sizeof(question.args));
322 printf("dmr->%d\n", rc);
323 if (rc < 0) return;
324
325 memset(&reply, 0, sizeof(reply));
326 rc = udebug_mem_read(phoneid, &reply.args, sc_args[2], sizeof(reply.args));
327 printf("dmr->%d\n", rc);
328 if (rc < 0) return;
329
330 ipcp_call_sync(sc_args[0], &question, &reply);
331}
332
333static void sc_ipc_wait(sysarg_t *sc_args, int sc_rc)
334{
335 ipc_call_t call;
336 int rc;
337
338 if (sc_rc == 0) return;
339
340 memset(&call, 0, sizeof(call));
341 rc = udebug_mem_read(phoneid, &call, sc_args[0], sizeof(call));
342// printf("udebug_mem_read(phone %d, dest %d, app-mem src %d, size %d -> %d\n",
343// phoneid, (int)&call, sc_args[0], sizeof(call), rc);
344
345 if (rc >= 0) {
346 ipcp_call_in(&call, sc_rc);
347 }
348}
349
350static void event_syscall_b(unsigned thread_id, uintptr_t thread_hash,
351 unsigned sc_id, sysarg_t sc_rc)
352{
353 sysarg_t sc_args[6];
354 int rc;
355
356 /* Read syscall arguments */
357 rc = udebug_args_read(phoneid, thread_hash, sc_args);
358
359 async_serialize_start();
360
361// printf("[%d] ", thread_id);
362
363 if (rc < 0) {
364 printf("error\n");
365 async_serialize_end();
366 return;
367 }
368
369 if ((display_mask & DM_SYSCALL) != 0) {
370 /* Print syscall name and arguments */
371 printf("%s", syscall_desc[sc_id].name);
372 print_sc_args(sc_args, syscall_desc[sc_id].n_args);
373 }
374
375 async_serialize_end();
376}
377
378static void event_syscall_e(unsigned thread_id, uintptr_t thread_hash,
379 unsigned sc_id, sysarg_t sc_rc)
380{
381 sysarg_t sc_args[6];
382 int rv_type;
383 int rc;
384
385 /* Read syscall arguments */
386 rc = udebug_args_read(phoneid, thread_hash, sc_args);
387
388 async_serialize_start();
389
390// printf("[%d] ", thread_id);
391
392 if (rc < 0) {
393 printf("error\n");
394 async_serialize_end();
395 return;
396 }
397
398 if ((display_mask & DM_SYSCALL) != 0) {
399 /* Print syscall return value */
400 rv_type = syscall_desc[sc_id].rv_type;
401 print_sc_retval(sc_rc, rv_type);
402 }
403
404 switch (sc_id) {
405 case SYS_IPC_CALL_ASYNC_FAST:
406 sc_ipc_call_async_fast(sc_args, sc_rc);
407 break;
408 case SYS_IPC_CALL_ASYNC_SLOW:
409 sc_ipc_call_async_slow(sc_args, sc_rc);
410 break;
411 case SYS_IPC_CALL_SYNC_FAST:
412 sc_ipc_call_sync_fast(sc_args);
413 break;
414 case SYS_IPC_CALL_SYNC_SLOW:
415 sc_ipc_call_sync_slow(sc_args);
416 break;
417 case SYS_IPC_WAIT:
418 sc_ipc_wait(sc_args, sc_rc);
419 break;
420 default:
421 break;
422 }
423
424 async_serialize_end();
425}
426
427static void event_thread_b(uintptr_t hash)
428{
429 async_serialize_start();
430 printf("New thread, hash 0x%lx\n", hash);
431 async_serialize_end();
432
433 thread_trace_start(hash);
434}
435
436static int trace_loop(void *thread_hash_arg)
437{
438 int rc;
439 unsigned ev_type;
440 uintptr_t thread_hash;
441 unsigned thread_id;
442 sysarg_t val0, val1;
443
444 thread_hash = (uintptr_t)thread_hash_arg;
445 thread_id = next_thread_id++;
446
447 printf("Start tracing thread [%d] (hash 0x%lx)\n", thread_id, thread_hash);
448
449 while (!abort_trace) {
450
451 /* Run thread until an event occurs */
452 rc = udebug_go(phoneid, thread_hash,
453 &ev_type, &val0, &val1);
454
455// printf("rc = %d, ev_type=%d\n", rc, ev_type);
456 if (ev_type == UDEBUG_EVENT_FINISHED) {
457 /* Done tracing this thread */
458 break;
459 }
460
461 if (rc >= 0) {
462 switch (ev_type) {
463 case UDEBUG_EVENT_SYSCALL_B:
464 event_syscall_b(thread_id, thread_hash, val0, (int)val1);
465 break;
466 case UDEBUG_EVENT_SYSCALL_E:
467 event_syscall_e(thread_id, thread_hash, val0, (int)val1);
468 break;
469 case UDEBUG_EVENT_STOP:
470 printf("Stop event\n");
471 printf("Waiting for resume\n");
472 while (paused) {
473 usleep(1000000);
474 fibril_yield();
475 printf(".");
476 }
477 printf("Resumed\n");
478 break;
479 case UDEBUG_EVENT_THREAD_B:
480 event_thread_b(val0);
481 break;
482 case UDEBUG_EVENT_THREAD_E:
483 printf("Thread 0x%lx exited\n", val0);
484 abort_trace = 1;
485 break;
486 default:
487 printf("Unknown event type %d\n", ev_type);
488 break;
489 }
490 }
491
492 }
493
494 printf("Finished tracing thread [%d]\n", thread_id);
495 return 0;
496}
497
498void thread_trace_start(uintptr_t thread_hash)
499{
500 fid_t fid;
501
502 thash = thread_hash;
503
504 fid = fibril_create(trace_loop, (void *)thread_hash);
505 if (fid == 0) {
506 printf("Warning: Failed creating fibril\n");
507 }
508 fibril_add_ready(fid);
509}
510
511static loader_t *preload_task(const char *path, char *const argv[],
512 task_id_t *task_id)
513{
514 loader_t *ldr;
515 int rc;
516
517 /* Spawn a program loader */
518 ldr = loader_spawn();
519 if (ldr == NULL)
520 return 0;
521
522 /* Get task ID. */
523 rc = loader_get_task_id(ldr, task_id);
524 if (rc != EOK)
525 goto error;
526
527 /* Send program pathname */
528 rc = loader_set_pathname(ldr, path);
529 if (rc != EOK)
530 goto error;
531
532 /* Send arguments */
533 rc = loader_set_args(ldr, argv);
534 if (rc != EOK)
535 goto error;
536
537 /* Load the program. */
538 rc = loader_load_program(ldr);
539 if (rc != EOK)
540 goto error;
541
542 /* Success */
543 return ldr;
544
545 /* Error exit */
546error:
547 loader_abort(ldr);
548 free(ldr);
549 return NULL;
550}
551
552static void trace_task(task_id_t task_id)
553{
554 int i;
555 int rc;
556 int c;
557
558 ipcp_init();
559
560 /*
561 * User apps now typically have console on phone 3.
562 * (Phones 1 and 2 are used by the loader).
563 */
564 ipcp_connection_set(3, 0, proto_console);
565
566 rc = get_thread_list();
567 if (rc < 0) {
568 printf("Failed to get thread list (error %d)\n", rc);
569 return;
570 }
571
572 abort_trace = 0;
573
574 for (i = 0; i < n_threads; i++) {
575 thread_trace_start(thread_hash_buf[i]);
576 }
577
578 while(1) {
579 c = getchar();
580 if (c == 'q') break;
581 if (c == 'p') {
582 paused = 1;
583 rc = udebug_stop(phoneid, thash);
584 printf("stop -> %d\n", rc);
585 }
586 if (c == 'r') {
587 paused = 0;
588 }
589 }
590
591 printf("\nTerminate debugging session...\n");
592 abort_trace = 1;
593 udebug_end(phoneid);
594 ipc_hangup(phoneid);
595
596 ipcp_cleanup();
597
598 printf("Done\n");
599 return;
600}
601
602static void main_init(void)
603{
604 proto_t *p;
605 oper_t *o;
606
607 val_type_t arg_def[OPER_MAX_ARGS] = {
608 V_INTEGER,
609 V_INTEGER,
610 V_INTEGER,
611 V_INTEGER,
612 V_INTEGER
613 };
614
615 val_type_t resp_def[OPER_MAX_ARGS] = {
616 V_INTEGER,
617 V_INTEGER,
618 V_INTEGER,
619 V_INTEGER,
620 V_INTEGER
621 };
622
623 next_thread_id = 1;
624 paused = 0;
625
626 proto_init();
627
628 p = proto_new("vfs");
629 o = oper_new("read", 1, arg_def, V_ERRNO, 1, resp_def);
630 proto_add_oper(p, VFS_READ, o);
631 o = oper_new("write", 1, arg_def, V_ERRNO, 1, resp_def);
632 proto_add_oper(p, VFS_WRITE, o);
633 o = oper_new("truncate", 5, arg_def, V_ERRNO, 0, resp_def);
634 proto_add_oper(p, VFS_TRUNCATE, o);
635 o = oper_new("mount", 2, arg_def, V_ERRNO, 0, resp_def);
636 proto_add_oper(p, VFS_MOUNT, o);
637/* o = oper_new("unmount", 0, arg_def);
638 proto_add_oper(p, VFS_UNMOUNT, o);*/
639
640 proto_register(SERVICE_VFS, p);
641
642 p = proto_new("console");
643 resp_def[0] = V_CHAR;
644 o = oper_new("getchar", 0, arg_def, V_INTEGER, 2, resp_def);
645 proto_add_oper(p, CONSOLE_GETCHAR, o);
646
647 arg_def[0] = V_CHAR;
648 o = oper_new("putchar", 1, arg_def, V_VOID, 0, resp_def);
649 proto_add_oper(p, CONSOLE_PUTCHAR, o);
650 o = oper_new("clear", 0, arg_def, V_VOID, 0, resp_def);
651 proto_add_oper(p, CONSOLE_CLEAR, o);
652
653 arg_def[0] = V_INTEGER; arg_def[1] = V_INTEGER;
654 o = oper_new("goto", 2, arg_def, V_VOID, 0, resp_def);
655 proto_add_oper(p, CONSOLE_GOTO, o);
656
657 resp_def[0] = V_INTEGER; resp_def[1] = V_INTEGER;
658 o = oper_new("getsize", 0, arg_def, V_INTEGER, 2, resp_def);
659 proto_add_oper(p, CONSOLE_GETSIZE, o);
660 o = oper_new("flush", 0, arg_def, V_VOID, 0, resp_def);
661 proto_add_oper(p, CONSOLE_FLUSH, o);
662
663 arg_def[0] = V_INTEGER; arg_def[1] = V_INTEGER;
664 o = oper_new("set_style", 2, arg_def, V_INTEGER, 0, resp_def);
665 proto_add_oper(p, CONSOLE_SET_STYLE, o);
666 o = oper_new("cursor_visibility", 1, arg_def, V_VOID, 0, resp_def);
667 proto_add_oper(p, CONSOLE_CURSOR_VISIBILITY, o);
668
669 proto_console = p;
670 proto_register(SERVICE_CONSOLE, p);
671}
672
673static void print_syntax()
674{
675 printf("Syntax:\n");
676 printf("\ttrace [+<events>] <executable> [<arg1> [...]]\n");
677 printf("or\ttrace [+<events>] -t <task_id>\n");
678 printf("Events: (default is +tp)\n");
679 printf("\n");
680 printf("\tt ... Thread creation and termination\n");
681 printf("\ts ... System calls\n");
682 printf("\ti ... Low-level IPC\n");
683 printf("\tp ... Protocol level\n");
684 printf("\n");
685 printf("Examples:\n");
686 printf("\ttrace +s /app/tetris\n");
687 printf("\ttrace +tsip -t 12\n");
688}
689
690static display_mask_t parse_display_mask(char *text)
691{
692 display_mask_t dm;
693 char *c;
694
695 c = text;
696
697 while (*c) {
698 switch (*c) {
699 case 't': dm = dm | DM_THREAD; break;
700 case 's': dm = dm | DM_SYSCALL; break;
701 case 'i': dm = dm | DM_IPC; break;
702 case 'p': dm = dm | DM_SYSTEM | DM_USER; break;
703 default:
704 printf("Unexpected event type '%c'\n", *c);
705 exit(1);
706 }
707
708 ++c;
709 }
710
711 return dm;
712}
713
714static int parse_args(int argc, char *argv[])
715{
716 char *arg;
717 char *err_p;
718
719 task_id = 0;
720
721 --argc; ++argv;
722
723 while (argc > 0) {
724 arg = *argv;
725 if (arg[0] == '+') {
726 display_mask = parse_display_mask(&arg[1]);
727 } else if (arg[0] == '-') {
728 if (arg[1] == 't') {
729 /* Trace an already running task */
730 --argc; ++argv;
731 task_id = strtol(*argv, &err_p, 10);
732 task_ldr = NULL;
733 if (*err_p) {
734 printf("Task ID syntax error\n");
735 print_syntax();
736 return -1;
737 }
738 } else {
739 printf("Uknown option '%s'\n", arg[0]);
740 print_syntax();
741 return -1;
742 }
743 } else {
744 break;
745 }
746
747 --argc; ++argv;
748 }
749
750 if (task_id != 0) {
751 if (argc == 0) return 0;
752 printf("Extra arguments\n");
753 print_syntax();
754 return -1;
755 }
756
757 if (argc < 1) {
758 printf("Missing argument\n");
759 print_syntax();
760 return -1;
761 }
762
763 /* Preload the specified program file. */
764 printf("Spawning '%s' with arguments:\n", *argv);
765 {
766 char **cp = argv;
767 while (*cp) printf("'%s'\n", *cp++);
768 }
769 task_ldr = preload_task(*argv, argv, &task_id);
770
771 return 0;
772}
773
774int main(int argc, char *argv[])
775{
776 int rc;
777
778 printf("System Call / IPC Tracer\n");
779
780 display_mask = DM_THREAD | DM_SYSTEM | DM_USER;
781
782 if (parse_args(argc, argv) < 0)
783 return 1;
784
785 main_init();
786
787 rc = connect_task(task_id);
788 if (rc < 0) {
789 printf("Failed connecting to task %lld\n", task_id);
790 return 1;
791 }
792
793 printf("Connected to task %lld\n", task_id);
794
795 if (task_ldr != NULL) {
796 program_run();
797 }
798
799 trace_task(task_id);
800
801 return 0;
802}
803
804/** @}
805 */
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