Not all debugger operations that enumerate threads require thread stacks to be resident in memory to be useful. Instead, push P_INMEM checks (if needed) into callers. Reviewed by: kib Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D27827
922 lines
21 KiB
C
922 lines
21 KiB
C
/*-
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* SPDX-License-Identifier: MIT-CMU
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*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* Author: David B. Golub, Carnegie Mellon University
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* Date: 7/90
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*/
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/*
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* Command dispatcher.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/eventhandler.h>
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#include <sys/linker_set.h>
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#include <sys/lock.h>
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#include <sys/kdb.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/reboot.h>
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#include <sys/signalvar.h>
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#include <sys/systm.h>
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#include <sys/cons.h>
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#include <sys/conf.h>
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#include <sys/watchdog.h>
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#include <sys/kernel.h>
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#include <ddb/ddb.h>
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#include <ddb/db_command.h>
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#include <ddb/db_lex.h>
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#include <ddb/db_output.h>
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#include <machine/cpu.h>
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#include <machine/setjmp.h>
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/*
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* Exported global variables
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*/
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int db_cmd_loop_done;
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db_addr_t db_dot;
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db_addr_t db_last_addr;
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db_addr_t db_prev;
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db_addr_t db_next;
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static db_cmdfcn_t db_dump;
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static db_cmdfcn_t db_fncall;
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static db_cmdfcn_t db_gdb;
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static db_cmdfcn_t db_halt;
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static db_cmdfcn_t db_kill;
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static db_cmdfcn_t db_reset;
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static db_cmdfcn_t db_stack_trace;
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static db_cmdfcn_t db_stack_trace_active;
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static db_cmdfcn_t db_stack_trace_all;
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static db_cmdfcn_t db_watchdog;
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/*
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* 'show' commands
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*/
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static struct command db_show_active_cmds[] = {
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{ "trace", db_stack_trace_active, 0, NULL },
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};
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struct command_table db_show_active_table =
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LIST_HEAD_INITIALIZER(db_show_active_table);
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static struct command db_show_all_cmds[] = {
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{ "trace", db_stack_trace_all, 0, NULL },
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};
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struct command_table db_show_all_table =
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LIST_HEAD_INITIALIZER(db_show_all_table);
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static struct command db_show_cmds[] = {
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{ "active", 0, 0, &db_show_active_table },
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{ "all", 0, 0, &db_show_all_table },
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{ "registers", db_show_regs, 0, NULL },
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{ "breaks", db_listbreak_cmd, 0, NULL },
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{ "threads", db_show_threads, 0, NULL },
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};
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struct command_table db_show_table = LIST_HEAD_INITIALIZER(db_show_table);
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static struct command db_cmds[] = {
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{ "print", db_print_cmd, 0, NULL },
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{ "p", db_print_cmd, 0, NULL },
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{ "examine", db_examine_cmd, CS_SET_DOT, NULL },
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{ "x", db_examine_cmd, CS_SET_DOT, NULL },
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{ "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL },
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{ "set", db_set_cmd, CS_OWN, NULL },
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{ "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL },
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{ "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL },
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{ "delete", db_delete_cmd, 0, NULL },
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{ "d", db_delete_cmd, 0, NULL },
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{ "dump", db_dump, 0, NULL },
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{ "break", db_breakpoint_cmd, 0, NULL },
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{ "b", db_breakpoint_cmd, 0, NULL },
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{ "dwatch", db_deletewatch_cmd, 0, NULL },
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{ "watch", db_watchpoint_cmd, CS_MORE,NULL },
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{ "dhwatch", db_deletehwatch_cmd, 0, NULL },
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{ "hwatch", db_hwatchpoint_cmd, 0, NULL },
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{ "step", db_single_step_cmd, 0, NULL },
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{ "s", db_single_step_cmd, 0, NULL },
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{ "continue", db_continue_cmd, 0, NULL },
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{ "c", db_continue_cmd, 0, NULL },
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{ "until", db_trace_until_call_cmd,0, NULL },
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{ "next", db_trace_until_matching_cmd,0, NULL },
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{ "match", db_trace_until_matching_cmd,0, NULL },
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{ "trace", db_stack_trace, CS_OWN, NULL },
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{ "t", db_stack_trace, CS_OWN, NULL },
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/* XXX alias for active trace */
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{ "acttrace", db_stack_trace_active, 0, NULL },
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/* XXX alias for all trace */
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{ "alltrace", db_stack_trace_all, 0, NULL },
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{ "where", db_stack_trace, CS_OWN, NULL },
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{ "bt", db_stack_trace, CS_OWN, NULL },
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{ "call", db_fncall, CS_OWN, NULL },
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{ "show", 0, 0, &db_show_table },
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{ "ps", db_ps, 0, NULL },
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{ "gdb", db_gdb, 0, NULL },
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{ "halt", db_halt, 0, NULL },
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{ "reboot", db_reset, 0, NULL },
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{ "reset", db_reset, 0, NULL },
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{ "kill", db_kill, CS_OWN, NULL },
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{ "watchdog", db_watchdog, CS_OWN, NULL },
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{ "thread", db_set_thread, 0, NULL },
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{ "run", db_run_cmd, CS_OWN, NULL },
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{ "script", db_script_cmd, CS_OWN, NULL },
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{ "scripts", db_scripts_cmd, 0, NULL },
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{ "unscript", db_unscript_cmd, CS_OWN, NULL },
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{ "capture", db_capture_cmd, CS_OWN, NULL },
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{ "textdump", db_textdump_cmd, CS_OWN, NULL },
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{ "findstack", db_findstack_cmd, 0, NULL },
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};
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struct command_table db_cmd_table = LIST_HEAD_INITIALIZER(db_cmd_table);
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static struct command *db_last_command = NULL;
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/*
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* if 'ed' style: 'dot' is set at start of last item printed,
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* and '+' points to next line.
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* Otherwise: 'dot' points to next item, '..' points to last.
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*/
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static bool db_ed_style = true;
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/*
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* Utility routine - discard tokens through end-of-line.
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*/
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void
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db_skip_to_eol(void)
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{
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int t;
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do {
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t = db_read_token();
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} while (t != tEOL);
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}
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/*
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* Results of command search.
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*/
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#define CMD_UNIQUE 0
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#define CMD_FOUND 1
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#define CMD_NONE 2
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#define CMD_AMBIGUOUS 3
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#define CMD_HELP 4
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static void db_cmd_match(char *name, struct command *cmd,
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struct command **cmdp, int *resultp);
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static void db_cmd_list(struct command_table *table);
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static int db_cmd_search(char *name, struct command_table *table,
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struct command **cmdp);
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static void db_command(struct command **last_cmdp,
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struct command_table *cmd_table, int dopager);
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/*
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* Initialize the command lists from the static tables.
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*/
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void
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db_command_init(void)
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{
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#define N(a) (sizeof(a) / sizeof(a[0]))
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int i;
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for (i = 0; i < N(db_cmds); i++)
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db_command_register(&db_cmd_table, &db_cmds[i]);
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for (i = 0; i < N(db_show_cmds); i++)
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db_command_register(&db_show_table, &db_show_cmds[i]);
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for (i = 0; i < N(db_show_active_cmds); i++)
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db_command_register(&db_show_active_table,
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&db_show_active_cmds[i]);
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for (i = 0; i < N(db_show_all_cmds); i++)
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db_command_register(&db_show_all_table, &db_show_all_cmds[i]);
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#undef N
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}
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/*
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* Register a command.
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*/
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void
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db_command_register(struct command_table *list, struct command *cmd)
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{
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struct command *c, *last;
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last = NULL;
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LIST_FOREACH(c, list, next) {
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int n = strcmp(cmd->name, c->name);
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/* Check that the command is not already present. */
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if (n == 0) {
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printf("%s: Warning, the command \"%s\" already exists;"
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" ignoring request\n", __func__, cmd->name);
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return;
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}
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if (n < 0) {
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/* NB: keep list sorted lexicographically */
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LIST_INSERT_BEFORE(c, cmd, next);
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return;
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}
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last = c;
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}
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if (last == NULL)
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LIST_INSERT_HEAD(list, cmd, next);
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else
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LIST_INSERT_AFTER(last, cmd, next);
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}
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/*
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* Remove a command previously registered with db_command_register.
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*/
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void
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db_command_unregister(struct command_table *list, struct command *cmd)
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{
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struct command *c;
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LIST_FOREACH(c, list, next) {
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if (cmd == c) {
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LIST_REMOVE(cmd, next);
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return;
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}
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}
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/* NB: intentionally quiet */
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}
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/*
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* Helper function to match a single command.
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*/
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static void
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db_cmd_match(char *name, struct command *cmd, struct command **cmdp,
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int *resultp)
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{
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char *lp, *rp;
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int c;
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lp = name;
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rp = cmd->name;
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while ((c = *lp) == *rp) {
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if (c == 0) {
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/* complete match */
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*cmdp = cmd;
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*resultp = CMD_UNIQUE;
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return;
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}
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lp++;
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rp++;
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}
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if (c == 0) {
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/* end of name, not end of command -
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partial match */
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if (*resultp == CMD_FOUND) {
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*resultp = CMD_AMBIGUOUS;
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/* but keep looking for a full match -
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this lets us match single letters */
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} else {
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*cmdp = cmd;
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*resultp = CMD_FOUND;
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}
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}
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}
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/*
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* Search for command prefix.
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*/
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static int
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db_cmd_search(char *name, struct command_table *table, struct command **cmdp)
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{
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struct command *cmd;
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int result = CMD_NONE;
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LIST_FOREACH(cmd, table, next) {
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db_cmd_match(name,cmd,cmdp,&result);
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if (result == CMD_UNIQUE)
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break;
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}
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if (result == CMD_NONE) {
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/* check for 'help' */
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if (name[0] == 'h' && name[1] == 'e'
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&& name[2] == 'l' && name[3] == 'p')
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result = CMD_HELP;
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}
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return (result);
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}
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static void
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db_cmd_list(struct command_table *table)
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{
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struct command *cmd;
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int have_subcommands;
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have_subcommands = 0;
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LIST_FOREACH(cmd, table, next) {
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if (cmd->more != NULL)
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have_subcommands++;
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db_printf("%-16s", cmd->name);
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db_end_line(16);
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}
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if (have_subcommands > 0) {
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db_printf("\nThe following have subcommands; append \"help\" "
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"to list (e.g. \"show help\"):\n");
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LIST_FOREACH(cmd, table, next) {
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if (cmd->more == NULL)
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continue;
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db_printf("%-16s", cmd->name);
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db_end_line(16);
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}
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}
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}
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static void
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db_command(struct command **last_cmdp, struct command_table *cmd_table,
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int dopager)
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{
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struct command *cmd = NULL;
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int t;
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char modif[TOK_STRING_SIZE];
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db_expr_t addr, count;
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bool have_addr = false;
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int result;
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t = db_read_token();
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if (t == tEOL) {
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/* empty line repeats last command, at 'next' */
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cmd = *last_cmdp;
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addr = (db_expr_t)db_next;
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have_addr = false;
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count = 1;
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modif[0] = '\0';
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}
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else if (t == tEXCL) {
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db_fncall((db_expr_t)0, (bool)false, (db_expr_t)0, (char *)0);
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return;
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}
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else if (t != tIDENT) {
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db_printf("Unrecognized input; use \"help\" "
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"to list available commands\n");
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db_flush_lex();
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return;
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}
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else {
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/*
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* Search for command
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*/
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while (cmd_table) {
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result = db_cmd_search(db_tok_string,
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cmd_table,
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&cmd);
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switch (result) {
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case CMD_NONE:
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db_printf("No such command; use \"help\" "
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"to list available commands\n");
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db_flush_lex();
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return;
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case CMD_AMBIGUOUS:
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db_printf("Ambiguous\n");
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db_flush_lex();
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return;
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case CMD_HELP:
|
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if (cmd_table == &db_cmd_table) {
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db_printf("This is ddb(4), the kernel debugger; "
|
|
"see https://man.FreeBSD.org/ddb/4 for help.\n");
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db_printf("Use \"bt\" for backtrace, \"dump\" for "
|
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"kernel core dump, \"reset\" to reboot.\n");
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db_printf("Available commands:\n");
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}
|
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db_cmd_list(cmd_table);
|
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db_flush_lex();
|
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return;
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|
default:
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break;
|
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}
|
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if ((cmd_table = cmd->more) != NULL) {
|
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t = db_read_token();
|
|
if (t != tIDENT) {
|
|
db_printf("Subcommand required; "
|
|
"available subcommands:\n");
|
|
db_cmd_list(cmd_table);
|
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db_flush_lex();
|
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return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((cmd->flag & CS_OWN) == 0) {
|
|
/*
|
|
* Standard syntax:
|
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* command [/modifier] [addr] [,count]
|
|
*/
|
|
t = db_read_token();
|
|
if (t == tSLASH) {
|
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t = db_read_token();
|
|
if (t != tIDENT) {
|
|
db_printf("Bad modifier\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
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db_strcpy(modif, db_tok_string);
|
|
}
|
|
else {
|
|
db_unread_token(t);
|
|
modif[0] = '\0';
|
|
}
|
|
|
|
if (db_expression(&addr)) {
|
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db_dot = (db_addr_t) addr;
|
|
db_last_addr = db_dot;
|
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have_addr = true;
|
|
}
|
|
else {
|
|
addr = (db_expr_t) db_dot;
|
|
have_addr = false;
|
|
}
|
|
t = db_read_token();
|
|
if (t == tCOMMA) {
|
|
if (!db_expression(&count)) {
|
|
db_printf("Count missing\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
}
|
|
else {
|
|
db_unread_token(t);
|
|
count = -1;
|
|
}
|
|
if ((cmd->flag & CS_MORE) == 0) {
|
|
db_skip_to_eol();
|
|
}
|
|
}
|
|
}
|
|
*last_cmdp = cmd;
|
|
if (cmd != NULL) {
|
|
/*
|
|
* Execute the command.
|
|
*/
|
|
if (dopager)
|
|
db_enable_pager();
|
|
else
|
|
db_disable_pager();
|
|
(*cmd->fcn)(addr, have_addr, count, modif);
|
|
if (dopager)
|
|
db_disable_pager();
|
|
|
|
if (cmd->flag & CS_SET_DOT) {
|
|
/*
|
|
* If command changes dot, set dot to
|
|
* previous address displayed (if 'ed' style).
|
|
*/
|
|
if (db_ed_style) {
|
|
db_dot = db_prev;
|
|
}
|
|
else {
|
|
db_dot = db_next;
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* If command does not change dot,
|
|
* set 'next' location to be the same.
|
|
*/
|
|
db_next = db_dot;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* At least one non-optional command must be implemented using
|
|
* DB_COMMAND() so that db_cmd_set gets created. Here is one.
|
|
*/
|
|
DB_COMMAND(panic, db_panic)
|
|
{
|
|
db_disable_pager();
|
|
panic("from debugger");
|
|
}
|
|
|
|
void
|
|
db_command_loop(void)
|
|
{
|
|
/*
|
|
* Initialize 'prev' and 'next' to dot.
|
|
*/
|
|
db_prev = db_dot;
|
|
db_next = db_dot;
|
|
|
|
db_cmd_loop_done = 0;
|
|
while (!db_cmd_loop_done) {
|
|
if (db_print_position() != 0)
|
|
db_printf("\n");
|
|
|
|
db_printf("db> ");
|
|
(void) db_read_line();
|
|
|
|
db_command(&db_last_command, &db_cmd_table, /* dopager */ 1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Execute a command on behalf of a script. The caller is responsible for
|
|
* making sure that the command string is < DB_MAXLINE or it will be
|
|
* truncated.
|
|
*
|
|
* XXXRW: Runs by injecting faked input into DDB input stream; it would be
|
|
* nicer to use an alternative approach that didn't mess with the previous
|
|
* command buffer.
|
|
*/
|
|
void
|
|
db_command_script(const char *command)
|
|
{
|
|
db_prev = db_next = db_dot;
|
|
db_inject_line(command);
|
|
db_command(&db_last_command, &db_cmd_table, /* dopager */ 0);
|
|
}
|
|
|
|
void
|
|
db_error(const char *s)
|
|
{
|
|
if (s)
|
|
db_printf("%s", s);
|
|
db_flush_lex();
|
|
kdb_reenter_silent();
|
|
}
|
|
|
|
static void
|
|
db_dump(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4)
|
|
{
|
|
int error;
|
|
|
|
if (textdump_pending) {
|
|
db_printf("textdump_pending set.\n"
|
|
"run \"textdump unset\" first or \"textdump dump\" for a textdump.\n");
|
|
return;
|
|
}
|
|
error = doadump(false);
|
|
if (error) {
|
|
db_printf("Cannot dump: ");
|
|
switch (error) {
|
|
case EBUSY:
|
|
db_printf("debugger got invoked while dumping.\n");
|
|
break;
|
|
case ENXIO:
|
|
db_printf("no dump device specified.\n");
|
|
break;
|
|
default:
|
|
db_printf("unknown error (error=%d).\n", error);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Call random function:
|
|
* !expr(arg,arg,arg)
|
|
*/
|
|
|
|
/* The generic implementation supports a maximum of 10 arguments. */
|
|
typedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t,
|
|
db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t);
|
|
|
|
static __inline int
|
|
db_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[])
|
|
{
|
|
__db_f *f = (__db_f *)addr;
|
|
|
|
if (nargs > 10) {
|
|
db_printf("Too many arguments (max 10)\n");
|
|
return (0);
|
|
}
|
|
*rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5],
|
|
args[6], args[7], args[8], args[9]);
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
db_fncall(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
|
|
{
|
|
db_expr_t fn_addr;
|
|
db_expr_t args[DB_MAXARGS];
|
|
int nargs = 0;
|
|
db_expr_t retval;
|
|
int t;
|
|
|
|
if (!db_expression(&fn_addr)) {
|
|
db_printf("Bad function\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
|
|
t = db_read_token();
|
|
if (t == tLPAREN) {
|
|
if (db_expression(&args[0])) {
|
|
nargs++;
|
|
while ((t = db_read_token()) == tCOMMA) {
|
|
if (nargs == DB_MAXARGS) {
|
|
db_printf("Too many arguments (max %d)\n", DB_MAXARGS);
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
if (!db_expression(&args[nargs])) {
|
|
db_printf("Argument missing\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
nargs++;
|
|
}
|
|
db_unread_token(t);
|
|
}
|
|
if (db_read_token() != tRPAREN) {
|
|
db_printf("Mismatched parens\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
}
|
|
db_skip_to_eol();
|
|
db_disable_pager();
|
|
|
|
if (DB_CALL(fn_addr, &retval, nargs, args))
|
|
db_printf("= %#lr\n", (long)retval);
|
|
}
|
|
|
|
static void
|
|
db_halt(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4)
|
|
{
|
|
|
|
cpu_halt();
|
|
}
|
|
|
|
static void
|
|
db_kill(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
|
|
{
|
|
db_expr_t old_radix, pid, sig;
|
|
struct proc *p;
|
|
|
|
#define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0)
|
|
|
|
/*
|
|
* PIDs and signal numbers are typically represented in base
|
|
* 10, so make that the default here. It can, of course, be
|
|
* overridden by specifying a prefix.
|
|
*/
|
|
old_radix = db_radix;
|
|
db_radix = 10;
|
|
/* Retrieve arguments. */
|
|
if (!db_expression(&sig))
|
|
DB_ERROR(("Missing signal number\n"));
|
|
if (!db_expression(&pid))
|
|
DB_ERROR(("Missing process ID\n"));
|
|
db_skip_to_eol();
|
|
if (!_SIG_VALID(sig))
|
|
DB_ERROR(("Signal number out of range\n"));
|
|
|
|
/*
|
|
* Find the process in question. allproc_lock is not needed
|
|
* since we're in DDB.
|
|
*/
|
|
/* sx_slock(&allproc_lock); */
|
|
FOREACH_PROC_IN_SYSTEM(p)
|
|
if (p->p_pid == pid)
|
|
break;
|
|
/* sx_sunlock(&allproc_lock); */
|
|
if (p == NULL)
|
|
DB_ERROR(("Can't find process with pid %ld\n", (long) pid));
|
|
|
|
/* If it's already locked, bail; otherwise, do the deed. */
|
|
if (PROC_TRYLOCK(p) == 0)
|
|
DB_ERROR(("Can't lock process with pid %ld\n", (long) pid));
|
|
else {
|
|
pksignal(p, sig, NULL);
|
|
PROC_UNLOCK(p);
|
|
}
|
|
|
|
out:
|
|
db_radix = old_radix;
|
|
#undef DB_ERROR
|
|
}
|
|
|
|
/*
|
|
* Reboot. In case there is an additional argument, take it as delay in
|
|
* seconds. Default to 15s if we cannot parse it and make sure we will
|
|
* never wait longer than 1 week. Some code is similar to
|
|
* kern_shutdown.c:shutdown_panic().
|
|
*/
|
|
#ifndef DB_RESET_MAXDELAY
|
|
#define DB_RESET_MAXDELAY (3600 * 24 * 7)
|
|
#endif
|
|
|
|
static void
|
|
db_reset(db_expr_t addr, bool have_addr, db_expr_t count __unused,
|
|
char *modif __unused)
|
|
{
|
|
int delay, loop;
|
|
|
|
if (have_addr) {
|
|
delay = (int)db_hex2dec(addr);
|
|
|
|
/* If we parse to fail, use 15s. */
|
|
if (delay == -1)
|
|
delay = 15;
|
|
|
|
/* Cap at one week. */
|
|
if ((uintmax_t)delay > (uintmax_t)DB_RESET_MAXDELAY)
|
|
delay = DB_RESET_MAXDELAY;
|
|
|
|
db_printf("Automatic reboot in %d seconds - "
|
|
"press a key on the console to abort\n", delay);
|
|
for (loop = delay * 10; loop > 0; --loop) {
|
|
DELAY(1000 * 100); /* 1/10th second */
|
|
/* Did user type a key? */
|
|
if (cncheckc() != -1)
|
|
return;
|
|
}
|
|
}
|
|
|
|
cpu_reset();
|
|
}
|
|
|
|
static void
|
|
db_watchdog(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
|
|
{
|
|
db_expr_t old_radix, tout;
|
|
int err, i;
|
|
|
|
old_radix = db_radix;
|
|
db_radix = 10;
|
|
err = db_expression(&tout);
|
|
db_skip_to_eol();
|
|
db_radix = old_radix;
|
|
|
|
/* If no argument is provided the watchdog will just be disabled. */
|
|
if (err == 0) {
|
|
db_printf("No argument provided, disabling watchdog\n");
|
|
tout = 0;
|
|
} else if ((tout & WD_INTERVAL) == WD_TO_NEVER) {
|
|
db_error("Out of range watchdog interval\n");
|
|
return;
|
|
}
|
|
EVENTHANDLER_INVOKE(watchdog_list, tout, &i);
|
|
}
|
|
|
|
static void
|
|
db_gdb(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
|
|
{
|
|
|
|
if (kdb_dbbe_select("gdb") != 0) {
|
|
db_printf("The remote GDB backend could not be selected.\n");
|
|
return;
|
|
}
|
|
/*
|
|
* Mark that we are done in the debugger. kdb_trap()
|
|
* should re-enter with the new backend.
|
|
*/
|
|
db_cmd_loop_done = 1;
|
|
db_printf("(ctrl-c will return control to ddb)\n");
|
|
}
|
|
|
|
static void
|
|
db_stack_trace(db_expr_t tid, bool hastid, db_expr_t count, char *modif)
|
|
{
|
|
struct thread *td;
|
|
db_expr_t radix;
|
|
pid_t pid;
|
|
int t;
|
|
|
|
/*
|
|
* We parse our own arguments. We don't like the default radix.
|
|
*/
|
|
radix = db_radix;
|
|
db_radix = 10;
|
|
hastid = db_expression(&tid);
|
|
t = db_read_token();
|
|
if (t == tCOMMA) {
|
|
if (!db_expression(&count)) {
|
|
db_printf("Count missing\n");
|
|
db_flush_lex();
|
|
db_radix = radix;
|
|
return;
|
|
}
|
|
} else {
|
|
db_unread_token(t);
|
|
count = -1;
|
|
}
|
|
db_skip_to_eol();
|
|
db_radix = radix;
|
|
|
|
if (hastid) {
|
|
td = kdb_thr_lookup((lwpid_t)tid);
|
|
if (td == NULL)
|
|
td = kdb_thr_from_pid((pid_t)tid);
|
|
if (td == NULL) {
|
|
db_printf("Thread %d not found\n", (int)tid);
|
|
return;
|
|
}
|
|
} else
|
|
td = kdb_thread;
|
|
if (td->td_proc != NULL)
|
|
pid = td->td_proc->p_pid;
|
|
else
|
|
pid = -1;
|
|
db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td);
|
|
if (td->td_proc != NULL && (td->td_proc->p_flag & P_INMEM) == 0)
|
|
db_printf("--- swapped out\n");
|
|
else
|
|
db_trace_thread(td, count);
|
|
}
|
|
|
|
static void
|
|
_db_stack_trace_all(bool active_only)
|
|
{
|
|
struct proc *p;
|
|
struct thread *td;
|
|
jmp_buf jb;
|
|
void *prev_jb;
|
|
|
|
FOREACH_PROC_IN_SYSTEM(p) {
|
|
prev_jb = kdb_jmpbuf(jb);
|
|
if (setjmp(jb) == 0) {
|
|
FOREACH_THREAD_IN_PROC(p, td) {
|
|
if (td->td_state == TDS_RUNNING)
|
|
db_printf("\nTracing command %s pid %d"
|
|
" tid %ld td %p (CPU %d)\n",
|
|
p->p_comm, p->p_pid,
|
|
(long)td->td_tid, td,
|
|
td->td_oncpu);
|
|
else if (active_only)
|
|
continue;
|
|
else
|
|
db_printf("\nTracing command %s pid %d"
|
|
" tid %ld td %p\n", p->p_comm,
|
|
p->p_pid, (long)td->td_tid, td);
|
|
db_trace_thread(td, -1);
|
|
if (db_pager_quit) {
|
|
kdb_jmpbuf(prev_jb);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
kdb_jmpbuf(prev_jb);
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_stack_trace_active(db_expr_t dummy, bool dummy2, db_expr_t dummy3,
|
|
char *dummy4)
|
|
{
|
|
|
|
_db_stack_trace_all(true);
|
|
}
|
|
|
|
static void
|
|
db_stack_trace_all(db_expr_t dummy, bool dummy2, db_expr_t dummy3,
|
|
char *dummy4)
|
|
{
|
|
|
|
_db_stack_trace_all(false);
|
|
}
|
|
|
|
/*
|
|
* Take the parsed expression value from the command line that was parsed
|
|
* as a hexadecimal value and convert it as if the expression was parsed
|
|
* as a decimal value. Returns -1 if the expression was not a valid
|
|
* decimal value.
|
|
*/
|
|
db_expr_t
|
|
db_hex2dec(db_expr_t expr)
|
|
{
|
|
uintptr_t x, y;
|
|
db_expr_t val;
|
|
|
|
y = 1;
|
|
val = 0;
|
|
x = expr;
|
|
while (x != 0) {
|
|
if (x % 16 > 9)
|
|
return (-1);
|
|
val += (x % 16) * (y);
|
|
x >>= 4;
|
|
y *= 10;
|
|
}
|
|
return (val);
|
|
}
|