db_command.c revision 139747
1189251Ssam/*- 2214734Srpaulo * Mach Operating System 3252726Srpaulo * Copyright (c) 1991,1990 Carnegie Mellon University 4189251Ssam * All Rights Reserved. 5252726Srpaulo * 6252726Srpaulo * Permission to use, copy, modify and distribute this software and its 7189251Ssam * documentation is hereby granted, provided that both the copyright 8189251Ssam * notice and this permission notice appear in all copies of the 9189251Ssam * software, derivative works or modified versions, and any portions 10189251Ssam * thereof, and that both notices appear in supporting documentation. 11189251Ssam * 12189251Ssam * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13252726Srpaulo * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14214734Srpaulo * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15214734Srpaulo * 16189251Ssam * Carnegie Mellon requests users of this software to return to 17189251Ssam * 18189251Ssam * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19189251Ssam * School of Computer Science 20189251Ssam * Carnegie Mellon University 21189251Ssam * Pittsburgh PA 15213-3890 22252726Srpaulo * 23252726Srpaulo * any improvements or extensions that they make and grant Carnegie the 24252726Srpaulo * rights to redistribute these changes. 25189251Ssam */ 26189251Ssam/* 27189251Ssam * Author: David B. Golub, Carnegie Mellon University 28189251Ssam * Date: 7/90 29189251Ssam */ 30189251Ssam/* 31189251Ssam * Command dispatcher. 32189251Ssam */ 33189251Ssam 34189251Ssam#include <sys/cdefs.h> 35189251Ssam__FBSDID("$FreeBSD: head/sys/ddb/db_command.c 139747 2005-01-06 01:34:41Z imp $"); 36252726Srpaulo 37189251Ssam#include <sys/param.h> 38189251Ssam#include <sys/linker_set.h> 39189251Ssam#include <sys/lock.h> 40189251Ssam#include <sys/kdb.h> 41189251Ssam#include <sys/mutex.h> 42189251Ssam#include <sys/proc.h> 43189251Ssam#include <sys/reboot.h> 44189251Ssam#include <sys/signalvar.h> 45189251Ssam#include <sys/systm.h> 46189251Ssam#include <sys/cons.h> 47189251Ssam#include <sys/watchdog.h> 48189251Ssam 49189251Ssam#include <ddb/ddb.h> 50189251Ssam#include <ddb/db_command.h> 51189251Ssam#include <ddb/db_lex.h> 52252726Srpaulo#include <ddb/db_output.h> 53252726Srpaulo 54252726Srpaulo#include <machine/cpu.h> 55252726Srpaulo#include <machine/setjmp.h> 56252726Srpaulo 57189251Ssam/* 58189251Ssam * Exported global variables 59189251Ssam */ 60189251Ssamboolean_t db_cmd_loop_done; 61189251Ssamdb_addr_t db_dot; 62189251Ssamdb_addr_t db_last_addr; 63189251Ssamdb_addr_t db_prev; 64189251Ssamdb_addr_t db_next; 65189251Ssam 66189251SsamSET_DECLARE(db_cmd_set, struct command); 67189251SsamSET_DECLARE(db_show_cmd_set, struct command); 68189251Ssam 69252726Srpaulostatic db_cmdfcn_t db_fncall; 70252726Srpaulostatic db_cmdfcn_t db_gdb; 71189251Ssamstatic db_cmdfcn_t db_kill; 72189251Ssamstatic db_cmdfcn_t db_reset; 73189251Ssamstatic db_cmdfcn_t db_stack_trace; 74189251Ssamstatic db_cmdfcn_t db_watchdog; 75189251Ssam 76189251Ssam/* XXX this is actually forward-static. */ 77189251Ssamextern struct command db_show_cmds[]; 78189251Ssam 79189251Ssam/* 80189251Ssam * if 'ed' style: 'dot' is set at start of last item printed, 81189251Ssam * and '+' points to next line. 82189251Ssam * Otherwise: 'dot' points to next item, '..' points to last. 83189251Ssam */ 84189251Ssamstatic boolean_t db_ed_style = TRUE; 85189251Ssam 86189251Ssam/* 87189251Ssam * Utility routine - discard tokens through end-of-line. 88252726Srpaulo */ 89252726Srpaulovoid 90189251Ssamdb_skip_to_eol() 91189251Ssam{ 92189251Ssam int t; 93189251Ssam do { 94189251Ssam t = db_read_token(); 95252726Srpaulo } while (t != tEOL); 96252726Srpaulo} 97252726Srpaulo 98252726Srpaulo/* 99252726Srpaulo * Results of command search. 100252726Srpaulo */ 101252726Srpaulo#define CMD_UNIQUE 0 102252726Srpaulo#define CMD_FOUND 1 103252726Srpaulo#define CMD_NONE 2 104252726Srpaulo#define CMD_AMBIGUOUS 3 105252726Srpaulo#define CMD_HELP 4 106252726Srpaulo 107252726Srpaulostatic void db_cmd_list(struct command *table, struct command **aux_tablep, 108252726Srpaulo struct command **aux_tablep_end); 109252726Srpaulostatic int db_cmd_search(char *name, struct command *table, 110252726Srpaulo struct command **aux_tablep, 111252726Srpaulo struct command **aux_tablep_end, struct command **cmdp); 112252726Srpaulostatic void db_command(struct command **last_cmdp, 113252726Srpaulo struct command *cmd_table, struct command **aux_cmd_tablep, 114252726Srpaulo struct command **aux_cmd_tablep_end); 115252726Srpaulo 116189251Ssam/* 117189251Ssam * Search for command prefix. 118189251Ssam */ 119189251Ssamstatic int 120189251Ssamdb_cmd_search(name, table, aux_tablep, aux_tablep_end, cmdp) 121189251Ssam char * name; 122189251Ssam struct command *table; 123189251Ssam struct command **aux_tablep; 124189251Ssam struct command **aux_tablep_end; 125189251Ssam struct command **cmdp; /* out */ 126189251Ssam{ 127189251Ssam struct command *cmd; 128189251Ssam struct command **aux_cmdp; 129189251Ssam int result = CMD_NONE; 130189251Ssam 131189251Ssam for (cmd = table; cmd->name != 0; cmd++) { 132189251Ssam register char *lp; 133189251Ssam register char *rp; 134189251Ssam register int c; 135189251Ssam 136189251Ssam lp = name; 137189251Ssam rp = cmd->name; 138189251Ssam while ((c = *lp) == *rp) { 139252726Srpaulo if (c == 0) { 140252726Srpaulo /* complete match */ 141252726Srpaulo *cmdp = cmd; 142252726Srpaulo return (CMD_UNIQUE); 143252726Srpaulo } 144252726Srpaulo lp++; 145252726Srpaulo rp++; 146252726Srpaulo } 147189251Ssam if (c == 0) { 148189251Ssam /* end of name, not end of command - 149189251Ssam partial match */ 150189251Ssam if (result == CMD_FOUND) { 151189251Ssam result = CMD_AMBIGUOUS; 152189251Ssam /* but keep looking for a full match - 153189251Ssam this lets us match single letters */ 154189251Ssam } 155189251Ssam else { 156189251Ssam *cmdp = cmd; 157189251Ssam result = CMD_FOUND; 158189251Ssam } 159189251Ssam } 160189251Ssam } 161189251Ssam if (result == CMD_NONE && aux_tablep != 0) 162189251Ssam /* XXX repeat too much code. */ 163189251Ssam for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) { 164189251Ssam register char *lp; 165189251Ssam register char *rp; 166189251Ssam register int c; 167189251Ssam 168189251Ssam lp = name; 169189251Ssam rp = (*aux_cmdp)->name; 170189251Ssam while ((c = *lp) == *rp) { 171189251Ssam if (c == 0) { 172189251Ssam /* complete match */ 173189251Ssam *cmdp = *aux_cmdp; 174189251Ssam return (CMD_UNIQUE); 175189251Ssam } 176189251Ssam lp++; 177189251Ssam rp++; 178189251Ssam } 179189251Ssam if (c == 0) { 180189251Ssam /* end of name, not end of command - 181189251Ssam partial match */ 182189251Ssam if (result == CMD_FOUND) { 183252726Srpaulo result = CMD_AMBIGUOUS; 184252726Srpaulo /* but keep looking for a full match - 185252726Srpaulo this lets us match single letters */ 186252726Srpaulo } 187252726Srpaulo else { 188252726Srpaulo *cmdp = *aux_cmdp; 189252726Srpaulo result = CMD_FOUND; 190252726Srpaulo } 191252726Srpaulo } 192252726Srpaulo } 193252726Srpaulo if (result == CMD_NONE) { 194189251Ssam /* check for 'help' */ 195189251Ssam if (name[0] == 'h' && name[1] == 'e' 196189251Ssam && name[2] == 'l' && name[3] == 'p') 197189251Ssam result = CMD_HELP; 198189251Ssam } 199189251Ssam return (result); 200189251Ssam} 201189251Ssam 202189251Ssamstatic void 203189251Ssamdb_cmd_list(table, aux_tablep, aux_tablep_end) 204189251Ssam struct command *table; 205189251Ssam struct command **aux_tablep; 206189251Ssam struct command **aux_tablep_end; 207189251Ssam{ 208189251Ssam register struct command *cmd; 209189251Ssam register struct command **aux_cmdp; 210189251Ssam 211189251Ssam for (cmd = table; cmd->name != 0; cmd++) { 212189251Ssam db_printf("%-12s", cmd->name); 213189251Ssam db_end_line(); 214189251Ssam } 215189251Ssam if (aux_tablep == 0) 216189251Ssam return; 217189251Ssam for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) { 218189251Ssam db_printf("%-12s", (*aux_cmdp)->name); 219189251Ssam db_end_line(); 220189251Ssam } 221189251Ssam} 222189251Ssam 223189251Ssamstatic void 224189251Ssamdb_command(last_cmdp, cmd_table, aux_cmd_tablep, aux_cmd_tablep_end) 225189251Ssam struct command **last_cmdp; /* IN_OUT */ 226189251Ssam struct command *cmd_table; 227189251Ssam struct command **aux_cmd_tablep; 228189251Ssam struct command **aux_cmd_tablep_end; 229189251Ssam{ 230189251Ssam struct command *cmd; 231189251Ssam int t; 232189251Ssam char modif[TOK_STRING_SIZE]; 233189251Ssam db_expr_t addr, count; 234252726Srpaulo boolean_t have_addr = FALSE; 235252726Srpaulo int result; 236252726Srpaulo 237252726Srpaulo t = db_read_token(); 238252726Srpaulo if (t == tEOL) { 239252726Srpaulo /* empty line repeats last command, at 'next' */ 240252726Srpaulo cmd = *last_cmdp; 241252726Srpaulo addr = (db_expr_t)db_next; 242252726Srpaulo have_addr = FALSE; 243252726Srpaulo count = 1; 244252726Srpaulo modif[0] = '\0'; 245252726Srpaulo } 246252726Srpaulo else if (t == tEXCL) { 247252726Srpaulo db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0); 248252726Srpaulo return; 249252726Srpaulo } 250252726Srpaulo else if (t != tIDENT) { 251252726Srpaulo db_printf("?\n"); 252252726Srpaulo db_flush_lex(); 253252726Srpaulo return; 254252726Srpaulo } 255252726Srpaulo else { 256252726Srpaulo /* 257252726Srpaulo * Search for command 258252726Srpaulo */ 259189251Ssam while (cmd_table) { 260189251Ssam result = db_cmd_search(db_tok_string, 261189251Ssam cmd_table, 262189251Ssam aux_cmd_tablep, 263189251Ssam aux_cmd_tablep_end, 264189251Ssam &cmd); 265189251Ssam switch (result) { 266189251Ssam case CMD_NONE: 267189251Ssam db_printf("No such command\n"); 268189251Ssam db_flush_lex(); 269189251Ssam return; 270189251Ssam case CMD_AMBIGUOUS: 271189251Ssam db_printf("Ambiguous\n"); 272189251Ssam db_flush_lex(); 273189251Ssam return; 274189251Ssam case CMD_HELP: 275189251Ssam db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end); 276 db_flush_lex(); 277 return; 278 default: 279 break; 280 } 281 if ((cmd_table = cmd->more) != 0) { 282 /* XXX usually no more aux's. */ 283 aux_cmd_tablep = 0; 284 if (cmd_table == db_show_cmds) { 285 aux_cmd_tablep = SET_BEGIN(db_show_cmd_set); 286 aux_cmd_tablep_end = SET_LIMIT(db_show_cmd_set); 287 } 288 289 t = db_read_token(); 290 if (t != tIDENT) { 291 db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end); 292 db_flush_lex(); 293 return; 294 } 295 } 296 } 297 298 if ((cmd->flag & CS_OWN) == 0) { 299 /* 300 * Standard syntax: 301 * command [/modifier] [addr] [,count] 302 */ 303 t = db_read_token(); 304 if (t == tSLASH) { 305 t = db_read_token(); 306 if (t != tIDENT) { 307 db_printf("Bad modifier\n"); 308 db_flush_lex(); 309 return; 310 } 311 db_strcpy(modif, db_tok_string); 312 } 313 else { 314 db_unread_token(t); 315 modif[0] = '\0'; 316 } 317 318 if (db_expression(&addr)) { 319 db_dot = (db_addr_t) addr; 320 db_last_addr = db_dot; 321 have_addr = TRUE; 322 } 323 else { 324 addr = (db_expr_t) db_dot; 325 have_addr = FALSE; 326 } 327 t = db_read_token(); 328 if (t == tCOMMA) { 329 if (!db_expression(&count)) { 330 db_printf("Count missing\n"); 331 db_flush_lex(); 332 return; 333 } 334 } 335 else { 336 db_unread_token(t); 337 count = -1; 338 } 339 if ((cmd->flag & CS_MORE) == 0) { 340 db_skip_to_eol(); 341 } 342 } 343 } 344 *last_cmdp = cmd; 345 if (cmd != 0) { 346 /* 347 * Execute the command. 348 */ 349 (*cmd->fcn)(addr, have_addr, count, modif); 350 db_setup_paging(NULL, NULL, -1); 351 352 if (cmd->flag & CS_SET_DOT) { 353 /* 354 * If command changes dot, set dot to 355 * previous address displayed (if 'ed' style). 356 */ 357 if (db_ed_style) { 358 db_dot = db_prev; 359 } 360 else { 361 db_dot = db_next; 362 } 363 } 364 else { 365 /* 366 * If command does not change dot, 367 * set 'next' location to be the same. 368 */ 369 db_next = db_dot; 370 } 371 } 372} 373 374/* 375 * 'show' commands 376 */ 377 378static struct command db_show_all_cmds[] = { 379 { "procs", db_ps, 0, 0 }, 380 { (char *)0 } 381}; 382 383static struct command db_show_cmds[] = { 384 { "all", 0, 0, db_show_all_cmds }, 385 { "registers", db_show_regs, 0, 0 }, 386 { "breaks", db_listbreak_cmd, 0, 0 }, 387 { "threads", db_show_threads, 0, 0 }, 388 { (char *)0, } 389}; 390 391static struct command db_command_table[] = { 392 { "print", db_print_cmd, 0, 0 }, 393 { "p", db_print_cmd, 0, 0 }, 394 { "examine", db_examine_cmd, CS_SET_DOT, 0 }, 395 { "x", db_examine_cmd, CS_SET_DOT, 0 }, 396 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 }, 397 { "set", db_set_cmd, CS_OWN, 0 }, 398 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 399 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 400 { "delete", db_delete_cmd, 0, 0 }, 401 { "d", db_delete_cmd, 0, 0 }, 402 { "break", db_breakpoint_cmd, 0, 0 }, 403 { "dwatch", db_deletewatch_cmd, 0, 0 }, 404 { "watch", db_watchpoint_cmd, CS_MORE,0 }, 405 { "dhwatch", db_deletehwatch_cmd, 0, 0 }, 406 { "hwatch", db_hwatchpoint_cmd, 0, 0 }, 407 { "step", db_single_step_cmd, 0, 0 }, 408 { "s", db_single_step_cmd, 0, 0 }, 409 { "continue", db_continue_cmd, 0, 0 }, 410 { "c", db_continue_cmd, 0, 0 }, 411 { "until", db_trace_until_call_cmd,0, 0 }, 412 { "next", db_trace_until_matching_cmd,0, 0 }, 413 { "match", db_trace_until_matching_cmd,0, 0 }, 414 { "trace", db_stack_trace, CS_OWN, 0 }, 415 { "where", db_stack_trace, CS_OWN, 0 }, 416 { "call", db_fncall, CS_OWN, 0 }, 417 { "show", 0, 0, db_show_cmds }, 418 { "ps", db_ps, 0, 0 }, 419 { "gdb", db_gdb, 0, 0 }, 420 { "reset", db_reset, 0, 0 }, 421 { "kill", db_kill, CS_OWN, 0 }, 422 { "watchdog", db_watchdog, 0, 0 }, 423 { "thread", db_set_thread, CS_OWN, 0 }, 424 { (char *)0, } 425}; 426 427static struct command *db_last_command = 0; 428 429/* 430 * At least one non-optional command must be implemented using 431 * DB_COMMAND() so that db_cmd_set gets created. Here is one. 432 */ 433DB_COMMAND(panic, db_panic) 434{ 435 panic("from debugger"); 436} 437 438void 439db_command_loop() 440{ 441 /* 442 * Initialize 'prev' and 'next' to dot. 443 */ 444 db_prev = db_dot; 445 db_next = db_dot; 446 447 db_cmd_loop_done = 0; 448 while (!db_cmd_loop_done) { 449 if (db_print_position() != 0) 450 db_printf("\n"); 451 452 db_printf("db> "); 453 (void) db_read_line(); 454 455 db_command(&db_last_command, db_command_table, 456 SET_BEGIN(db_cmd_set), SET_LIMIT(db_cmd_set)); 457 } 458} 459 460void 461db_error(s) 462 const char *s; 463{ 464 if (s) 465 db_printf("%s", s); 466 db_flush_lex(); 467 kdb_reenter(); 468} 469 470 471/* 472 * Call random function: 473 * !expr(arg,arg,arg) 474 */ 475static void 476db_fncall(dummy1, dummy2, dummy3, dummy4) 477 db_expr_t dummy1; 478 boolean_t dummy2; 479 db_expr_t dummy3; 480 char * dummy4; 481{ 482 db_expr_t fn_addr; 483#define MAXARGS 11 /* XXX only 10 are passed */ 484 db_expr_t args[MAXARGS]; 485 int nargs = 0; 486 db_expr_t retval; 487 typedef db_expr_t fcn_10args_t(db_expr_t, db_expr_t, db_expr_t, 488 db_expr_t, db_expr_t, db_expr_t, db_expr_t, 489 db_expr_t, db_expr_t, db_expr_t); 490 fcn_10args_t *func; 491 int t; 492 493 if (!db_expression(&fn_addr)) { 494 db_printf("Bad function\n"); 495 db_flush_lex(); 496 return; 497 } 498 func = (fcn_10args_t *)fn_addr; /* XXX */ 499 500 t = db_read_token(); 501 if (t == tLPAREN) { 502 if (db_expression(&args[0])) { 503 nargs++; 504 while ((t = db_read_token()) == tCOMMA) { 505 if (nargs == MAXARGS) { 506 db_printf("Too many arguments\n"); 507 db_flush_lex(); 508 return; 509 } 510 if (!db_expression(&args[nargs])) { 511 db_printf("Argument missing\n"); 512 db_flush_lex(); 513 return; 514 } 515 nargs++; 516 } 517 db_unread_token(t); 518 } 519 if (db_read_token() != tRPAREN) { 520 db_printf("?\n"); 521 db_flush_lex(); 522 return; 523 } 524 } 525 db_skip_to_eol(); 526 527 while (nargs < MAXARGS) { 528 args[nargs++] = 0; 529 } 530 531 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 532 args[5], args[6], args[7], args[8], args[9] ); 533 db_printf("%#lr\n", (long)retval); 534} 535 536static void 537db_kill(dummy1, dummy2, dummy3, dummy4) 538 db_expr_t dummy1; 539 boolean_t dummy2; 540 db_expr_t dummy3; 541 char * dummy4; 542{ 543 db_expr_t old_radix, pid, sig; 544 struct proc *p; 545 546#define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0) 547 548 /* 549 * PIDs and signal numbers are typically represented in base 550 * 10, so make that the default here. It can, of course, be 551 * overridden by specifying a prefix. 552 */ 553 old_radix = db_radix; 554 db_radix = 10; 555 /* Retrieve arguments. */ 556 if (!db_expression(&sig)) 557 DB_ERROR(("Missing signal number\n")); 558 if (!db_expression(&pid)) 559 DB_ERROR(("Missing process ID\n")); 560 db_skip_to_eol(); 561 if (sig < 0 || sig > _SIG_MAXSIG) 562 DB_ERROR(("Signal number out of range\n")); 563 564 /* 565 * Find the process in question. allproc_lock is not needed 566 * since we're in DDB. 567 */ 568 /* sx_slock(&allproc_lock); */ 569 LIST_FOREACH(p, &allproc, p_list) 570 if (p->p_pid == pid) 571 break; 572 /* sx_sunlock(&allproc_lock); */ 573 if (p == NULL) 574 DB_ERROR(("Can't find process with pid %ld\n", (long) pid)); 575 576 /* If it's already locked, bail; otherwise, do the deed. */ 577 if (PROC_TRYLOCK(p) == 0) 578 DB_ERROR(("Can't lock process with pid %ld\n", (long) pid)); 579 else { 580 psignal(p, sig); 581 PROC_UNLOCK(p); 582 } 583 584out: 585 db_radix = old_radix; 586#undef DB_ERROR 587} 588 589static void 590db_reset(dummy1, dummy2, dummy3, dummy4) 591 db_expr_t dummy1; 592 boolean_t dummy2; 593 db_expr_t dummy3; 594 char * dummy4; 595{ 596 597 cpu_reset(); 598} 599 600static void 601db_watchdog(dummy1, dummy2, dummy3, dummy4) 602 db_expr_t dummy1; 603 boolean_t dummy2; 604 db_expr_t dummy3; 605 char * dummy4; 606{ 607 int i; 608 609 /* 610 * XXX: It might make sense to be able to set the watchdog to a 611 * XXX: timeout here so that failure or hang as a result of subsequent 612 * XXX: ddb commands could be recovered by a reset. 613 */ 614 615 EVENTHANDLER_INVOKE(watchdog_list, 0, &i); 616} 617 618static void 619db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 620{ 621 622 if (kdb_dbbe_select("gdb") != 0) 623 db_printf("The remote GDB backend could not be selected.\n"); 624 else 625 db_printf("Step to enter the remote GDB backend.\n"); 626} 627 628static void 629db_stack_trace(db_expr_t tid, boolean_t hastid, db_expr_t count, char *modif) 630{ 631 struct thread *td; 632 db_expr_t radix; 633 pid_t pid; 634 int t; 635 636 /* 637 * We parse our own arguments. We don't like the default radix. 638 */ 639 radix = db_radix; 640 db_radix = 10; 641 hastid = db_expression(&tid); 642 t = db_read_token(); 643 if (t == tCOMMA) { 644 if (!db_expression(&count)) { 645 db_printf("Count missing\n"); 646 db_flush_lex(); 647 return; 648 } 649 } else { 650 db_unread_token(t); 651 count = -1; 652 } 653 db_skip_to_eol(); 654 db_radix = radix; 655 656 if (hastid) { 657 td = kdb_thr_lookup((lwpid_t)tid); 658 if (td == NULL) 659 td = kdb_thr_from_pid((pid_t)tid); 660 if (td == NULL) { 661 db_printf("Thread %d not found\n", (int)tid); 662 return; 663 } 664 } else 665 td = kdb_thread; 666 if (td->td_proc != NULL) 667 pid = td->td_proc->p_pid; 668 else 669 pid = -1; 670 db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 671 db_trace_thread(td, count); 672} 673