db_command.c revision 177615
190075Sobrien/*- 290075Sobrien * Mach Operating System 390075Sobrien * Copyright (c) 1991,1990 Carnegie Mellon University 4169689Skan * All Rights Reserved. 590075Sobrien * 690075Sobrien * Permission to use, copy, modify and distribute this software and its 790075Sobrien * documentation is hereby granted, provided that both the copyright 890075Sobrien * notice and this permission notice appear in all copies of the 990075Sobrien * software, derivative works or modified versions, and any portions 1090075Sobrien * thereof, and that both notices appear in supporting documentation. 1190075Sobrien * 1290075Sobrien * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 1390075Sobrien * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 1490075Sobrien * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 1590075Sobrien * 1690075Sobrien * Carnegie Mellon requests users of this software to return to 1790075Sobrien * 1890075Sobrien * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 1990075Sobrien * School of Computer Science 20169689Skan * Carnegie Mellon University 21169689Skan * Pittsburgh PA 15213-3890 2290075Sobrien * 23169689Skan * any improvements or extensions that they make and grant Carnegie the 24169689Skan * rights to redistribute these changes. 25169689Skan */ 26169689Skan/* 27169689Skan * Author: David B. Golub, Carnegie Mellon University 28169689Skan * Date: 7/90 29169689Skan */ 30169689Skan/* 31169689Skan * Command dispatcher. 32169689Skan */ 33117395Skan 34117395Skan#include <sys/cdefs.h> 35117395Skan__FBSDID("$FreeBSD: head/sys/ddb/db_command.c 177615 2008-03-25 20:36:32Z sam $"); 3690075Sobrien 3790075Sobrien#include <sys/param.h> 3890075Sobrien#include <sys/linker_set.h> 39169689Skan#include <sys/lock.h> 40169689Skan#include <sys/kdb.h> 41169689Skan#include <sys/mutex.h> 42169689Skan#include <sys/proc.h> 43169689Skan#include <sys/reboot.h> 44169689Skan#include <sys/signalvar.h> 4590075Sobrien#include <sys/systm.h> 4690075Sobrien#include <sys/cons.h> 4790075Sobrien#include <sys/watchdog.h> 4890075Sobrien 4990075Sobrien#include <ddb/ddb.h> 5090075Sobrien#include <ddb/db_command.h> 5190075Sobrien#include <ddb/db_lex.h> 5290075Sobrien#include <ddb/db_output.h> 5390075Sobrien 5490075Sobrien#include <machine/cpu.h> 5590075Sobrien#include <machine/setjmp.h> 5690075Sobrien 5790075Sobrien/* 5890075Sobrien * Exported global variables 5990075Sobrien */ 6090075Sobrienboolean_t db_cmd_loop_done; 6190075Sobriendb_addr_t db_dot; 6290075Sobriendb_addr_t db_last_addr; 6390075Sobriendb_addr_t db_prev; 6490075Sobriendb_addr_t db_next; 6590075Sobrien 6690075SobrienSET_DECLARE(db_cmd_set, struct command); 6790075SobrienSET_DECLARE(db_show_cmd_set, struct command); 6890075SobrienSET_DECLARE(db_show_all_cmd_set, struct command); 6990075Sobrien 7090075Sobrienstatic db_cmdfcn_t db_fncall; 7190075Sobrienstatic db_cmdfcn_t db_gdb; 7290075Sobrienstatic db_cmdfcn_t db_halt; 7390075Sobrienstatic db_cmdfcn_t db_kill; 7490075Sobrienstatic db_cmdfcn_t db_reset; 7590075Sobrienstatic db_cmdfcn_t db_stack_trace; 7690075Sobrienstatic db_cmdfcn_t db_stack_trace_all; 7790075Sobrienstatic db_cmdfcn_t db_watchdog; 7890075Sobrien 7990075Sobrien/* 8090075Sobrien * 'show' commands 8190075Sobrien */ 8290075Sobrien 8390075Sobrienstatic struct command db_show_all_cmds[] = { 8490075Sobrien { (char *)0 } 8590075Sobrien}; 8690075Sobrien 8790075Sobrienstatic struct command_table db_show_all_table = { 8890075Sobrien db_show_all_cmds, 8990075Sobrien SET_BEGIN(db_show_all_cmd_set), 9090075Sobrien SET_LIMIT(db_show_all_cmd_set) 9190075Sobrien}; 9290075Sobrien 9390075Sobrienstatic struct command db_show_cmds[] = { 9490075Sobrien { "all", 0, 0, &db_show_all_table }, 9590075Sobrien { "registers", db_show_regs, 0, 0 }, 9690075Sobrien { "breaks", db_listbreak_cmd, 0, 0 }, 9790075Sobrien { "threads", db_show_threads, 0, 0 }, 9890075Sobrien { (char *)0, } 9990075Sobrien}; 10090075Sobrien 101132718Skanstatic struct command_table db_show_table = { 10290075Sobrien db_show_cmds, 103169689Skan SET_BEGIN(db_show_cmd_set), 10490075Sobrien SET_LIMIT(db_show_cmd_set) 105102780Skan}; 106102780Skan 107102780Skanstatic struct command db_commands[] = { 108102780Skan { "print", db_print_cmd, 0, 0 }, 109102780Skan { "p", db_print_cmd, 0, 0 }, 110102780Skan { "examine", db_examine_cmd, CS_SET_DOT, 0 }, 11190075Sobrien { "x", db_examine_cmd, CS_SET_DOT, 0 }, 11290075Sobrien { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 }, 11390075Sobrien { "set", db_set_cmd, CS_OWN, 0 }, 11490075Sobrien { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 11590075Sobrien { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 11690075Sobrien { "delete", db_delete_cmd, 0, 0 }, 11790075Sobrien { "d", db_delete_cmd, 0, 0 }, 11890075Sobrien { "break", db_breakpoint_cmd, 0, 0 }, 11990075Sobrien { "b", db_breakpoint_cmd, 0, 0 }, 12090075Sobrien { "dwatch", db_deletewatch_cmd, 0, 0 }, 12190075Sobrien { "watch", db_watchpoint_cmd, CS_MORE,0 }, 12290075Sobrien { "dhwatch", db_deletehwatch_cmd, 0, 0 }, 12390075Sobrien { "hwatch", db_hwatchpoint_cmd, 0, 0 }, 12490075Sobrien { "step", db_single_step_cmd, 0, 0 }, 12590075Sobrien { "s", db_single_step_cmd, 0, 0 }, 12690075Sobrien { "continue", db_continue_cmd, 0, 0 }, 12790075Sobrien { "c", db_continue_cmd, 0, 0 }, 128117395Skan { "until", db_trace_until_call_cmd,0, 0 }, 12990075Sobrien { "next", db_trace_until_matching_cmd,0, 0 }, 13090075Sobrien { "match", db_trace_until_matching_cmd,0, 0 }, 131119256Skan { "trace", db_stack_trace, CS_OWN, 0 }, 132119256Skan { "t", db_stack_trace, CS_OWN, 0 }, 133119256Skan { "alltrace", db_stack_trace_all, 0, 0 }, 13490075Sobrien { "where", db_stack_trace, CS_OWN, 0 }, 13590075Sobrien { "bt", db_stack_trace, CS_OWN, 0 }, 13690075Sobrien { "call", db_fncall, CS_OWN, 0 }, 13790075Sobrien { "show", 0, 0, &db_show_table }, 13890075Sobrien { "ps", db_ps, 0, 0 }, 13990075Sobrien { "gdb", db_gdb, 0, 0 }, 14090075Sobrien { "halt", db_halt, 0, 0 }, 14190075Sobrien { "reboot", db_reset, 0, 0 }, 14290075Sobrien { "reset", db_reset, 0, 0 }, 14390075Sobrien { "kill", db_kill, CS_OWN, 0 }, 14490075Sobrien { "watchdog", db_watchdog, 0, 0 }, 145169689Skan { "thread", db_set_thread, CS_OWN, 0 }, 14690075Sobrien { "run", db_run_cmd, CS_OWN, 0 }, 14790075Sobrien { "script", db_script_cmd, CS_OWN, 0 }, 148132718Skan { "scripts", db_scripts_cmd, 0, 0 }, 14990075Sobrien { "unscript", db_unscript_cmd, CS_OWN, 0 }, 150132718Skan { "capture", db_capture_cmd, CS_OWN, 0 }, 151169689Skan { "textdump", db_textdump_cmd, CS_OWN, 0 }, 152169689Skan { (char *)0, } 153169689Skan}; 154169689Skan 155169689Skanstatic struct command_table db_command_table = { 156169689Skan db_commands, 15790075Sobrien SET_BEGIN(db_cmd_set), 15890075Sobrien SET_LIMIT(db_cmd_set) 15990075Sobrien}; 160132718Skan 16190075Sobrienstatic struct command *db_last_command = 0; 16290075Sobrien 16390075Sobrien/* 16490075Sobrien * if 'ed' style: 'dot' is set at start of last item printed, 165132718Skan * and '+' points to next line. 16690075Sobrien * Otherwise: 'dot' points to next item, '..' points to last. 16790075Sobrien */ 168132718Skanstatic boolean_t db_ed_style = TRUE; 16990075Sobrien 170132718Skan/* 171132718Skan * Utility routine - discard tokens through end-of-line. 172132718Skan */ 17390075Sobrienvoid 17490075Sobriendb_skip_to_eol() 17590075Sobrien{ 17690075Sobrien int t; 17790075Sobrien do { 17890075Sobrien t = db_read_token(); 17990075Sobrien } while (t != tEOL); 18090075Sobrien} 18190075Sobrien 18290075Sobrien/* 18390075Sobrien * Results of command search. 18490075Sobrien */ 18590075Sobrien#define CMD_UNIQUE 0 18690075Sobrien#define CMD_FOUND 1 18790075Sobrien#define CMD_NONE 2 188132718Skan#define CMD_AMBIGUOUS 3 189132718Skan#define CMD_HELP 4 190132718Skan 191169689Skanstatic void db_cmd_match(char *name, struct command *cmd, 192169689Skan struct command **cmdp, int *resultp); 193169689Skanstatic void db_cmd_list(struct command_table *table); 194169689Skanstatic int db_cmd_search(char *name, struct command_table *table, 195169689Skan struct command **cmdp); 196169689Skanstatic void db_command(struct command **last_cmdp, 197169689Skan struct command_table *cmd_table, int dopager); 198169689Skan 199169689Skan/* 200169689Skan * Helper function to match a single command. 201169689Skan */ 202169689Skanstatic void 203169689Skandb_cmd_match(name, cmd, cmdp, resultp) 204169689Skan char * name; 205169689Skan struct command *cmd; 206169689Skan struct command **cmdp; /* out */ 207169689Skan int * resultp; 208169689Skan{ 209169689Skan char *lp, *rp; 210169689Skan int c; 211169689Skan 212169689Skan lp = name; 213169689Skan rp = cmd->name; 214169689Skan while ((c = *lp) == *rp) { 215169689Skan if (c == 0) { 216169689Skan /* complete match */ 217169689Skan *cmdp = cmd; 218169689Skan *resultp = CMD_UNIQUE; 219169689Skan return; 220169689Skan } 221169689Skan lp++; 222169689Skan rp++; 223169689Skan } 224169689Skan if (c == 0) { 225169689Skan /* end of name, not end of command - 226169689Skan partial match */ 227169689Skan if (*resultp == CMD_FOUND) { 228169689Skan *resultp = CMD_AMBIGUOUS; 229169689Skan /* but keep looking for a full match - 230169689Skan this lets us match single letters */ 231169689Skan } else { 232169689Skan *cmdp = cmd; 233169689Skan *resultp = CMD_FOUND; 234169689Skan } 235169689Skan } 236169689Skan} 23790075Sobrien 23890075Sobrien/* 239169689Skan * Search for command prefix. 240169689Skan */ 241169689Skanstatic int 242169689Skandb_cmd_search(name, table, cmdp) 243169689Skan char * name; 244169689Skan struct command_table *table; 245169689Skan struct command **cmdp; /* out */ 246169689Skan{ 247169689Skan struct command *cmd; 248169689Skan struct command **aux_cmdp; 249169689Skan int result = CMD_NONE; 250169689Skan 251169689Skan for (cmd = table->table; cmd->name != 0; cmd++) { 252169689Skan db_cmd_match(name, cmd, cmdp, &result); 253169689Skan if (result == CMD_UNIQUE) 254169689Skan return (CMD_UNIQUE); 255169689Skan } 256169689Skan if (table->aux_tablep != NULL) 257169689Skan for (aux_cmdp = table->aux_tablep; 258169689Skan aux_cmdp < table->aux_tablep_end; 25990075Sobrien aux_cmdp++) { 26090075Sobrien db_cmd_match(name, *aux_cmdp, cmdp, &result); 26190075Sobrien if (result == CMD_UNIQUE) 26290075Sobrien return (CMD_UNIQUE); 26390075Sobrien } 26490075Sobrien if (result == CMD_NONE) { 26590075Sobrien /* check for 'help' */ 26690075Sobrien if (name[0] == 'h' && name[1] == 'e' 26790075Sobrien && name[2] == 'l' && name[3] == 'p') 26890075Sobrien result = CMD_HELP; 26990075Sobrien } 270169689Skan return (result); 271169689Skan} 272169689Skan 273169689Skanstatic void 27490075Sobriendb_cmd_list(table) 27590075Sobrien struct command_table *table; 27690075Sobrien{ 27790075Sobrien register struct command *cmd; 27890075Sobrien register struct command **aux_cmdp; 27990075Sobrien 28090075Sobrien for (cmd = table->table; cmd->name != 0; cmd++) { 28190075Sobrien db_printf("%-12s", cmd->name); 28290075Sobrien db_end_line(12); 28390075Sobrien } 28490075Sobrien if (table->aux_tablep == NULL) 285132718Skan return; 28690075Sobrien for (aux_cmdp = table->aux_tablep; aux_cmdp < table->aux_tablep_end; 28790075Sobrien aux_cmdp++) { 28890075Sobrien db_printf("%-12s", (*aux_cmdp)->name); 28990075Sobrien db_end_line(12); 29090075Sobrien } 29190075Sobrien} 29290075Sobrien 29390075Sobrienstatic void 29490075Sobriendb_command(last_cmdp, cmd_table, dopager) 29590075Sobrien struct command **last_cmdp; /* IN_OUT */ 296169689Skan struct command_table *cmd_table; 297169689Skan int dopager; 298169689Skan{ 299169689Skan struct command *cmd; 300169689Skan int t; 301169689Skan char modif[TOK_STRING_SIZE]; 302169689Skan db_expr_t addr, count; 30390075Sobrien boolean_t have_addr = FALSE; 30490075Sobrien int result; 30590075Sobrien 30690075Sobrien t = db_read_token(); 30790075Sobrien if (t == tEOL) { 30890075Sobrien /* empty line repeats last command, at 'next' */ 30990075Sobrien cmd = *last_cmdp; 31090075Sobrien addr = (db_expr_t)db_next; 31190075Sobrien have_addr = FALSE; 31290075Sobrien count = 1; 31390075Sobrien modif[0] = '\0'; 31490075Sobrien } 31590075Sobrien else if (t == tEXCL) { 31690075Sobrien db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0); 31790075Sobrien return; 31890075Sobrien } 319169689Skan else if (t != tIDENT) { 320169689Skan db_printf("?\n"); 321169689Skan db_flush_lex(); 322169689Skan return; 323169689Skan } 324169689Skan else { 325169689Skan /* 326169689Skan * Search for command 327169689Skan */ 328169689Skan while (cmd_table) { 329169689Skan result = db_cmd_search(db_tok_string, 330169689Skan cmd_table, 331169689Skan &cmd); 332169689Skan switch (result) { 333169689Skan case CMD_NONE: 334169689Skan db_printf("No such command\n"); 335169689Skan db_flush_lex(); 33690075Sobrien return; 33790075Sobrien case CMD_AMBIGUOUS: 33890075Sobrien db_printf("Ambiguous\n"); 339169689Skan db_flush_lex(); 340169689Skan return; 341169689Skan case CMD_HELP: 342169689Skan db_cmd_list(cmd_table); 34390075Sobrien db_flush_lex(); 34490075Sobrien return; 34590075Sobrien default: 34690075Sobrien break; 347169689Skan } 34890075Sobrien if ((cmd_table = cmd->more) != NULL) { 34990075Sobrien t = db_read_token(); 35090075Sobrien if (t != tIDENT) { 35190075Sobrien db_cmd_list(cmd_table); 35290075Sobrien db_flush_lex(); 35390075Sobrien return; 35490075Sobrien } 355169689Skan } 356169689Skan } 357169689Skan 358169689Skan if ((cmd->flag & CS_OWN) == 0) { 359169689Skan /* 360169689Skan * Standard syntax: 36190075Sobrien * command [/modifier] [addr] [,count] 362169689Skan */ 363169689Skan t = db_read_token(); 36490075Sobrien if (t == tSLASH) { 365169689Skan t = db_read_token(); 366169689Skan if (t != tIDENT) { 367169689Skan db_printf("Bad modifier\n"); 368169689Skan db_flush_lex(); 36990075Sobrien return; 370169689Skan } 371169689Skan db_strcpy(modif, db_tok_string); 372169689Skan } 373169689Skan else { 374169689Skan db_unread_token(t); 375169689Skan modif[0] = '\0'; 376169689Skan } 377169689Skan 378169689Skan if (db_expression(&addr)) { 379169689Skan db_dot = (db_addr_t) addr; 380169689Skan db_last_addr = db_dot; 381169689Skan have_addr = TRUE; 382169689Skan } 383169689Skan else { 384169689Skan addr = (db_expr_t) db_dot; 385169689Skan have_addr = FALSE; 386169689Skan } 387169689Skan t = db_read_token(); 388169689Skan if (t == tCOMMA) { 389169689Skan if (!db_expression(&count)) { 390169689Skan db_printf("Count missing\n"); 391169689Skan db_flush_lex(); 392169689Skan return; 393169689Skan } 394169689Skan } 395169689Skan else { 396169689Skan db_unread_token(t); 397169689Skan count = -1; 398169689Skan } 399169689Skan if ((cmd->flag & CS_MORE) == 0) { 400169689Skan db_skip_to_eol(); 401169689Skan } 402169689Skan } 403169689Skan } 404169689Skan *last_cmdp = cmd; 405169689Skan if (cmd != 0) { 406169689Skan /* 407169689Skan * Execute the command. 408169689Skan */ 409169689Skan if (dopager) 410169689Skan db_enable_pager(); 411169689Skan else 412169689Skan db_disable_pager(); 413169689Skan (*cmd->fcn)(addr, have_addr, count, modif); 414169689Skan if (dopager) 415169689Skan db_disable_pager(); 416169689Skan 417169689Skan if (cmd->flag & CS_SET_DOT) { 418169689Skan /* 419169689Skan * If command changes dot, set dot to 420169689Skan * previous address displayed (if 'ed' style). 421169689Skan */ 422169689Skan if (db_ed_style) { 423169689Skan db_dot = db_prev; 424169689Skan } 425169689Skan else { 426169689Skan db_dot = db_next; 427169689Skan } 428169689Skan } 429169689Skan else { 430169689Skan /* 431169689Skan * If command does not change dot, 432169689Skan * set 'next' location to be the same. 433169689Skan */ 434169689Skan db_next = db_dot; 435169689Skan } 436169689Skan } 437169689Skan} 438169689Skan 439169689Skan/* 440169689Skan * At least one non-optional command must be implemented using 441169689Skan * DB_COMMAND() so that db_cmd_set gets created. Here is one. 442169689Skan */ 443169689SkanDB_COMMAND(panic, db_panic) 444169689Skan{ 445169689Skan db_disable_pager(); 446169689Skan panic("from debugger"); 447169689Skan} 448169689Skan 449169689Skanvoid 450169689Skandb_command_loop() 451169689Skan{ 452169689Skan /* 453169689Skan * Initialize 'prev' and 'next' to dot. 454169689Skan */ 455169689Skan db_prev = db_dot; 456169689Skan db_next = db_dot; 457169689Skan 458169689Skan db_cmd_loop_done = 0; 459169689Skan while (!db_cmd_loop_done) { 460169689Skan if (db_print_position() != 0) 461169689Skan db_printf("\n"); 462169689Skan 463169689Skan db_printf("db> "); 464169689Skan (void) db_read_line(); 465169689Skan 466169689Skan db_command(&db_last_command, &db_command_table, /* dopager */ 1); 467169689Skan } 468169689Skan} 469169689Skan 470169689Skan/* 471169689Skan * Execute a command on behalf of a script. The caller is responsible for 472169689Skan * making sure that the command string is < DB_MAXLINE or it will be 473169689Skan * truncated. 474169689Skan * 475169689Skan * XXXRW: Runs by injecting faked input into DDB input stream; it would be 476169689Skan * nicer to use an alternative approach that didn't mess with the previous 477169689Skan * command buffer. 478169689Skan */ 479169689Skanvoid 480169689Skandb_command_script(const char *command) 481169689Skan{ 482169689Skan db_prev = db_next = db_dot; 483169689Skan db_inject_line(command); 484169689Skan db_command(&db_last_command, &db_command_table, /* dopager */ 0); 485169689Skan} 486169689Skan 487169689Skanvoid 488169689Skandb_error(s) 489169689Skan const char *s; 490169689Skan{ 491169689Skan if (s) 492169689Skan db_printf("%s", s); 493169689Skan db_flush_lex(); 494169689Skan kdb_reenter(); 495169689Skan} 496169689Skan 497169689Skan 498169689Skan/* 499169689Skan * Call random function: 500169689Skan * !expr(arg,arg,arg) 501169689Skan */ 502169689Skan 503169689Skan/* The generic implementation supports a maximum of 10 arguments. */ 504169689Skantypedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t, 505169689Skan db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t); 506169689Skan 507169689Skanstatic __inline int 508169689Skandb_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[]) 509169689Skan{ 510169689Skan __db_f *f = (__db_f *)addr; 511169689Skan 512169689Skan if (nargs > 10) { 513169689Skan db_printf("Too many arguments (max 10)\n"); 514169689Skan return (0); 515169689Skan } 516169689Skan *rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5], 517169689Skan args[6], args[7], args[8], args[9]); 518169689Skan return (1); 519169689Skan} 520169689Skan 521169689Skanstatic void 522169689Skandb_fncall(dummy1, dummy2, dummy3, dummy4) 523169689Skan db_expr_t dummy1; 524169689Skan boolean_t dummy2; 52590075Sobrien db_expr_t dummy3; 52690075Sobrien char * dummy4; 52790075Sobrien{ 528132718Skan db_expr_t fn_addr; 529132718Skan db_expr_t args[DB_MAXARGS]; 530132718Skan int nargs = 0; 531132718Skan db_expr_t retval; 532132718Skan int t; 533132718Skan 534132718Skan if (!db_expression(&fn_addr)) { 535132718Skan db_printf("Bad function\n"); 536132718Skan db_flush_lex(); 537132718Skan return; 538132718Skan } 539132718Skan 540132718Skan t = db_read_token(); 541132718Skan if (t == tLPAREN) { 542132718Skan if (db_expression(&args[0])) { 543132718Skan nargs++; 544132718Skan while ((t = db_read_token()) == tCOMMA) { 545132718Skan if (nargs == DB_MAXARGS) { 546132718Skan db_printf("Too many arguments (max %d)\n", DB_MAXARGS); 547132718Skan db_flush_lex(); 548132718Skan return; 549132718Skan } 550132718Skan if (!db_expression(&args[nargs])) { 551132718Skan db_printf("Argument missing\n"); 552132718Skan db_flush_lex(); 553132718Skan return; 554132718Skan } 555132718Skan nargs++; 556132718Skan } 557132718Skan db_unread_token(t); 558132718Skan } 559132718Skan if (db_read_token() != tRPAREN) { 560132718Skan db_printf("?\n"); 561132718Skan db_flush_lex(); 562132718Skan return; 563132718Skan } 564132718Skan } 565132718Skan db_skip_to_eol(); 566132718Skan db_disable_pager(); 567132718Skan 568132718Skan if (DB_CALL(fn_addr, &retval, nargs, args)) 569132718Skan db_printf("= %#lr\n", (long)retval); 570132718Skan} 571132718Skan 572132718Skanstatic void 573132718Skandb_halt(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 574132718Skan{ 575132718Skan 576132718Skan cpu_halt(); 577132718Skan} 578132718Skan 579132718Skanstatic void 580132718Skandb_kill(dummy1, dummy2, dummy3, dummy4) 581132718Skan db_expr_t dummy1; 582132718Skan boolean_t dummy2; 583132718Skan db_expr_t dummy3; 584132718Skan char * dummy4; 585132718Skan{ 586132718Skan db_expr_t old_radix, pid, sig; 587132718Skan struct proc *p; 588132718Skan 589132718Skan#define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0) 590132718Skan 591132718Skan /* 592132718Skan * PIDs and signal numbers are typically represented in base 593132718Skan * 10, so make that the default here. It can, of course, be 594132718Skan * overridden by specifying a prefix. 595132718Skan */ 596132718Skan old_radix = db_radix; 597132718Skan db_radix = 10; 59890075Sobrien /* Retrieve arguments. */ 59990075Sobrien if (!db_expression(&sig)) 60090075Sobrien DB_ERROR(("Missing signal number\n")); 60190075Sobrien if (!db_expression(&pid)) 60290075Sobrien DB_ERROR(("Missing process ID\n")); 60390075Sobrien db_skip_to_eol(); 60490075Sobrien if (sig < 1 || sig > _SIG_MAXSIG) 60590075Sobrien DB_ERROR(("Signal number out of range\n")); 60690075Sobrien 607169689Skan /* 60890075Sobrien * Find the process in question. allproc_lock is not needed 60990075Sobrien * since we're in DDB. 610169689Skan */ 611169689Skan /* sx_slock(&allproc_lock); */ 612132718Skan FOREACH_PROC_IN_SYSTEM(p) 613132718Skan if (p->p_pid == pid) 614132718Skan break; 615132718Skan /* sx_sunlock(&allproc_lock); */ 616132718Skan if (p == NULL) 617169689Skan DB_ERROR(("Can't find process with pid %ld\n", (long) pid)); 618132718Skan 619132718Skan /* If it's already locked, bail; otherwise, do the deed. */ 620132718Skan if (PROC_TRYLOCK(p) == 0) 621132718Skan DB_ERROR(("Can't lock process with pid %ld\n", (long) pid)); 622169689Skan else { 623169689Skan psignal(p, sig); 624169689Skan PROC_UNLOCK(p); 625169689Skan } 626169689Skan 627169689Skanout: 628169689Skan db_radix = old_radix; 629169689Skan#undef DB_ERROR 630169689Skan} 63190075Sobrien 63290075Sobrienstatic void 633132718Skandb_reset(dummy1, dummy2, dummy3, dummy4) 634169689Skan db_expr_t dummy1; 635132718Skan boolean_t dummy2; 63690075Sobrien db_expr_t dummy3; 637132718Skan char * dummy4; 638132718Skan{ 639132718Skan 640132718Skan cpu_reset(); 641132718Skan} 64290075Sobrien 643169689Skanstatic void 644132718Skandb_watchdog(dummy1, dummy2, dummy3, dummy4) 64590075Sobrien db_expr_t dummy1; 646169689Skan boolean_t dummy2; 647169689Skan db_expr_t dummy3; 648132718Skan char * dummy4; 64990075Sobrien{ 650169689Skan int i; 651169689Skan 652169689Skan /* 653169689Skan * XXX: It might make sense to be able to set the watchdog to a 654169689Skan * XXX: timeout here so that failure or hang as a result of subsequent 655169689Skan * XXX: ddb commands could be recovered by a reset. 65690075Sobrien */ 657169689Skan 658169689Skan EVENTHANDLER_INVOKE(watchdog_list, 0, &i); 659169689Skan} 660169689Skan 661169689Skanstatic void 662db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 663{ 664 665 if (kdb_dbbe_select("gdb") != 0) 666 db_printf("The remote GDB backend could not be selected.\n"); 667 else 668 db_printf("Step to enter the remote GDB backend.\n"); 669} 670 671static void 672db_stack_trace(db_expr_t tid, boolean_t hastid, db_expr_t count, char *modif) 673{ 674 struct thread *td; 675 db_expr_t radix; 676 pid_t pid; 677 int t; 678 679 /* 680 * We parse our own arguments. We don't like the default radix. 681 */ 682 radix = db_radix; 683 db_radix = 10; 684 hastid = db_expression(&tid); 685 t = db_read_token(); 686 if (t == tCOMMA) { 687 if (!db_expression(&count)) { 688 db_printf("Count missing\n"); 689 db_flush_lex(); 690 return; 691 } 692 } else { 693 db_unread_token(t); 694 count = -1; 695 } 696 db_skip_to_eol(); 697 db_radix = radix; 698 699 if (hastid) { 700 td = kdb_thr_lookup((lwpid_t)tid); 701 if (td == NULL) 702 td = kdb_thr_from_pid((pid_t)tid); 703 if (td == NULL) { 704 db_printf("Thread %d not found\n", (int)tid); 705 return; 706 } 707 } else 708 td = kdb_thread; 709 if (td->td_proc != NULL) 710 pid = td->td_proc->p_pid; 711 else 712 pid = -1; 713 db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 714 db_trace_thread(td, count); 715} 716 717static void 718db_stack_trace_all(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, 719 char *dummy4) 720{ 721 struct proc *p; 722 struct thread *td; 723 jmp_buf jb; 724 void *prev_jb; 725 726 FOREACH_PROC_IN_SYSTEM(p) { 727 prev_jb = kdb_jmpbuf(jb); 728 if (setjmp(jb) == 0) { 729 FOREACH_THREAD_IN_PROC(p, td) { 730 db_printf("\nTracing command %s pid %d tid %ld td %p\n", 731 p->p_comm, p->p_pid, (long)td->td_tid, td); 732 db_trace_thread(td, -1); 733 if (db_pager_quit) { 734 kdb_jmpbuf(prev_jb); 735 return; 736 } 737 } 738 } 739 kdb_jmpbuf(prev_jb); 740 } 741} 742