725 lines
16 KiB
C
725 lines
16 KiB
C
/* $NetBSD: db_command.c,v 1.68 2003/02/13 23:50:33 jmc Exp $ */
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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 "AS IS"
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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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* Command dispatcher.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: db_command.c,v 1.68 2003/02/13 23:50:33 jmc Exp $");
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#include "opt_ddb.h"
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#include "opt_inet.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/namei.h>
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#include <sys/pool.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <machine/db_machdep.h> /* type definitions */
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#if defined(_KERNEL_OPT)
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#include "opt_multiprocessor.h"
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#endif
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#ifdef MULTIPROCESSOR
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#include <machine/cpu.h>
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#endif
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#include <ddb/db_lex.h>
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#include <ddb/db_output.h>
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#include <ddb/db_command.h>
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#include <ddb/db_break.h>
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#include <ddb/db_watch.h>
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#include <ddb/db_run.h>
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#include <ddb/db_variables.h>
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#include <ddb/db_interface.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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#include <uvm/uvm_extern.h>
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#include <uvm/uvm_ddb.h>
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#include "arp.h"
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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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/*
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* Exported global variables
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*/
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boolean_t db_cmd_loop_done;
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label_t *db_recover;
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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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/*
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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 boolean_t db_ed_style = TRUE;
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static void db_buf_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_cmd_list(const struct db_command *);
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static int db_cmd_search(const char *, const struct db_command *,
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const struct db_command **);
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static void db_command(const struct db_command **,
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const struct db_command *);
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static void db_event_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_fncall(db_expr_t, int, db_expr_t, char *);
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static void db_malloc_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_map_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_namecache_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_object_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_page_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_pool_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_reboot_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_sifting_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_stack_trace_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_sync_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, char *);
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static void db_vnode_print_cmd(db_expr_t, int, db_expr_t, char *);
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/*
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* 'show' commands
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*/
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static const struct db_command db_show_all_cmds[] = {
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{ "callout", db_show_callout, 0, NULL },
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{ "procs", db_show_all_procs, 0, NULL },
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{ NULL, NULL, 0, NULL }
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};
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static const struct db_command db_show_cmds[] = {
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{ "all", NULL, 0, db_show_all_cmds },
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#if defined(INET) && (NARP > 0)
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{ "arptab", db_show_arptab, 0, NULL },
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#endif
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{ "breaks", db_listbreak_cmd, 0, NULL },
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{ "buf", db_buf_print_cmd, 0, NULL },
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{ "event", db_event_print_cmd, 0, NULL },
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{ "malloc", db_malloc_print_cmd, 0, NULL },
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{ "map", db_map_print_cmd, 0, NULL },
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{ "ncache", db_namecache_print_cmd, 0, NULL },
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{ "object", db_object_print_cmd, 0, NULL },
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{ "page", db_page_print_cmd, 0, NULL },
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{ "pool", db_pool_print_cmd, 0, NULL },
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{ "registers", db_show_regs, 0, NULL },
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{ "uvmexp", db_uvmexp_print_cmd, 0, NULL },
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{ "vnode", db_vnode_print_cmd, 0, NULL },
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{ "watches", db_listwatch_cmd, 0, NULL },
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{ NULL, NULL, 0, NULL }
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};
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static const struct db_command db_command_table[] = {
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{ "break", db_breakpoint_cmd, 0, NULL },
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{ "bt", db_stack_trace_cmd, 0, NULL },
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{ "c", db_continue_cmd, 0, NULL },
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{ "call", db_fncall, CS_OWN, NULL },
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{ "callout", db_show_callout, 0, NULL },
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{ "continue", db_continue_cmd, 0, NULL },
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{ "d", db_delete_cmd, 0, NULL },
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{ "delete", db_delete_cmd, 0, NULL },
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{ "dmesg", db_dmesg, 0, NULL },
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{ "dwatch", db_deletewatch_cmd, 0, NULL },
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{ "examine", db_examine_cmd, CS_SET_DOT, NULL },
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{ "kill", db_kill_proc, CS_OWN, NULL },
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#ifdef DB_MACHINE_COMMANDS
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{ "machine", NULL, 0, db_machine_command_table },
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#endif
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{ "match", db_trace_until_matching_cmd,0, NULL },
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{ "next", db_trace_until_matching_cmd,0, NULL },
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{ "p", db_print_cmd, 0, NULL },
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{ "print", db_print_cmd, 0, NULL },
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{ "ps", db_show_all_procs, 0, NULL },
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{ "reboot", db_reboot_cmd, CS_OWN, NULL },
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{ "s", db_single_step_cmd, 0, 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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{ "show", NULL, 0, db_show_cmds },
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{ "sifting", db_sifting_cmd, CS_OWN, NULL },
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{ "step", db_single_step_cmd, 0, NULL },
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{ "sync", db_sync_cmd, CS_OWN, NULL },
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{ "trace", db_stack_trace_cmd, 0, NULL },
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{ "until", db_trace_until_call_cmd,0, NULL },
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{ "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL },
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{ "watch", db_watchpoint_cmd, CS_MORE, NULL },
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{ "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL },
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{ "x", db_examine_cmd, CS_SET_DOT, NULL },
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{ NULL, NULL, 0, NULL }
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};
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static const struct db_command *db_last_command = NULL;
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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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void
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db_error(s)
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char *s;
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{
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if (s)
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db_printf("%s", s);
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db_flush_lex();
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longjmp(db_recover);
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}
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void
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db_command_loop(void)
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{
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label_t db_jmpbuf;
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label_t *savejmp;
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/*
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* Initialize 'prev' and 'next' to dot.
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*/
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db_prev = db_dot;
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db_next = db_dot;
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db_cmd_loop_done = 0;
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savejmp = db_recover;
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db_recover = &db_jmpbuf;
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(void) setjmp(&db_jmpbuf);
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while (!db_cmd_loop_done) {
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if (db_print_position() != 0)
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db_printf("\n");
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db_output_line = 0;
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#ifdef MULTIPROCESSOR
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db_printf("db{%ld}> ", (long)cpu_number());
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#else
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db_printf("db> ");
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#endif
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(void) db_read_line();
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db_command(&db_last_command, db_command_table);
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}
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db_recover = savejmp;
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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(const char *name, const struct db_command *table,
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const struct db_command **cmdp)
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{
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const struct db_command *cmd;
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int result = CMD_NONE;
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for (cmd = table; cmd->name != 0; cmd++) {
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const char *lp;
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const char *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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return (CMD_UNIQUE);
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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 (result == CMD_FOUND) {
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result = 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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result = CMD_FOUND;
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}
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}
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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(const struct db_command *table)
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{
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int i, j, w, columns, lines, width=0, numcmds;
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const char *p;
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for (numcmds = 0; table[numcmds].name != NULL; numcmds++) {
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w = strlen(table[numcmds].name);
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if (w > width)
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width = w;
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}
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width = DB_NEXT_TAB(width);
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columns = db_max_width / width;
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if (columns == 0)
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columns = 1;
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lines = (numcmds + columns - 1) / columns;
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for (i = 0; i < lines; i++) {
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for (j = 0; j < columns; j++) {
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p = table[j * lines + i].name;
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if (p)
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db_printf("%s", p);
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if (j * lines + i + lines >= numcmds) {
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db_putchar('\n');
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break;
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}
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w = strlen(p);
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while (w < width) {
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w = DB_NEXT_TAB(w);
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db_putchar('\t');
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}
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}
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}
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}
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static void
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db_command(const struct db_command **last_cmdp,
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const struct db_command *cmd_table)
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{
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const struct db_command *cmd;
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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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boolean_t have_addr = FALSE;
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int result;
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static db_expr_t last_count = 0;
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t = db_read_token();
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if ((t == tEOL) || (t == tCOMMA)) {
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/*
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* An empty line repeats last command, at 'next'.
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* Only a count repeats the last command with the new count.
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*/
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cmd = *last_cmdp;
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addr = (db_expr_t)db_next;
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if (t == tCOMMA) {
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if (!db_expression(&count)) {
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db_printf("Count missing\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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count = last_count;
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have_addr = FALSE;
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modif[0] = '\0';
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db_skip_to_eol();
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} else if (t == tEXCL) {
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db_fncall(0, 0, 0, NULL);
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return;
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} else if (t != tIDENT) {
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db_printf("?\n");
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db_flush_lex();
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return;
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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, cmd_table, &cmd);
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switch (result) {
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case CMD_NONE:
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db_printf("No such command\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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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) != 0) {
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t = db_read_token();
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if (t != tIDENT) {
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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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}
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}
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}
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if ((cmd->flag & CS_OWN) == 0) {
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/*
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* Standard syntax:
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* command [/modifier] [addr] [,count]
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*/
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t = db_read_token();
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if (t == tSLASH) {
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t = db_read_token();
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if (t != tIDENT) {
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db_printf("Bad modifier\n");
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db_flush_lex();
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return;
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}
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db_strcpy(modif, db_tok_string);
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} else {
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db_unread_token(t);
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modif[0] = '\0';
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}
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if (db_expression(&addr)) {
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db_dot = (db_addr_t) addr;
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db_last_addr = db_dot;
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have_addr = TRUE;
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} else {
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addr = (db_expr_t) db_dot;
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have_addr = FALSE;
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}
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t = db_read_token();
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if (t == tCOMMA) {
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if (!db_expression(&count)) {
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db_printf("Count missing\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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db_unread_token(t);
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count = -1;
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}
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if ((cmd->flag & CS_MORE) == 0) {
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db_skip_to_eol();
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}
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}
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}
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*last_cmdp = cmd;
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last_count = count;
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if (cmd != 0) {
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/*
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* Execute the command.
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*/
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(*cmd->fcn)(addr, have_addr, count, modif);
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if (cmd->flag & CS_SET_DOT) {
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/*
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* If command changes dot, set dot to
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* previous address displayed (if 'ed' style).
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*/
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if (db_ed_style)
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db_dot = db_prev;
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else
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db_dot = db_next;
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} else {
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/*
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* If command does not change dot,
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* set 'next' location to be the same.
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*/
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db_next = db_dot;
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}
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}
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}
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/*ARGSUSED*/
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static void
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db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
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{
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boolean_t full = FALSE;
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if (modif[0] == 'f')
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full = TRUE;
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if (have_addr == FALSE)
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addr = (db_expr_t)(intptr_t) kernel_map;
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uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf);
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}
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/*ARGSUSED*/
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static void
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db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
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{
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#ifdef MALLOC_DEBUG
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if (!have_addr)
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addr = 0;
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debug_malloc_printit(db_printf, (vaddr_t) addr);
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#else
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db_printf("The kernel is not built with the MALLOC_DEBUG option.\n");
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#endif /* MALLOC_DEBUG */
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}
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/*ARGSUSED*/
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static void
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db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
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{
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boolean_t full = FALSE;
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if (modif[0] == 'f')
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full = TRUE;
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uvm_object_printit((struct uvm_object *)(intptr_t) addr, full,
|
|
db_printf);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
boolean_t full = FALSE;
|
|
|
|
if (modif[0] == 'f')
|
|
full = TRUE;
|
|
|
|
uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
boolean_t full = FALSE;
|
|
|
|
if (modif[0] == 'f')
|
|
full = TRUE;
|
|
|
|
vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
boolean_t full = FALSE;
|
|
|
|
if (modif[0] == 'f')
|
|
full = TRUE;
|
|
|
|
event_print(full, db_printf);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
boolean_t full = FALSE;
|
|
|
|
if (modif[0] == 'f')
|
|
full = TRUE;
|
|
|
|
vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
|
|
pool_printit((struct pool *)(intptr_t) addr, modif, db_printf);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count,
|
|
char *modif)
|
|
{
|
|
|
|
namecache_print((struct vnode *)(intptr_t) addr, db_printf);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
|
|
uvmexp_print(db_printf);
|
|
}
|
|
|
|
/*
|
|
* Call random function:
|
|
* !expr(arg,arg,arg)
|
|
*/
|
|
/*ARGSUSED*/
|
|
static void
|
|
db_fncall(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
db_expr_t fn_addr;
|
|
#define MAXARGS 11
|
|
db_expr_t args[MAXARGS];
|
|
int nargs = 0;
|
|
db_expr_t retval;
|
|
db_expr_t (*func)(db_expr_t, ...);
|
|
int t;
|
|
|
|
if (!db_expression(&fn_addr)) {
|
|
db_printf("Bad function\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr;
|
|
|
|
t = db_read_token();
|
|
if (t == tLPAREN) {
|
|
if (db_expression(&args[0])) {
|
|
nargs++;
|
|
while ((t = db_read_token()) == tCOMMA) {
|
|
if (nargs == MAXARGS) {
|
|
db_printf("Too many arguments\n");
|
|
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("?\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
}
|
|
db_skip_to_eol();
|
|
|
|
while (nargs < MAXARGS) {
|
|
args[nargs++] = 0;
|
|
}
|
|
|
|
retval = (*func)(args[0], args[1], args[2], args[3], args[4],
|
|
args[5], args[6], args[7], args[8], args[9]);
|
|
db_printf("%s\n", db_num_to_str(retval));
|
|
}
|
|
|
|
static void
|
|
db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
db_expr_t bootflags;
|
|
|
|
/* Flags, default to RB_AUTOBOOT */
|
|
if (!db_expression(&bootflags))
|
|
bootflags = (db_expr_t)RB_AUTOBOOT;
|
|
if (db_read_token() != tEOL) {
|
|
db_error("?\n");
|
|
/*NOTREACHED*/
|
|
}
|
|
/*
|
|
* We are leaving DDB, never to return upward.
|
|
* Clear db_recover so that we can debug faults in functions
|
|
* called from cpu_reboot.
|
|
*/
|
|
db_recover = 0;
|
|
cpu_reboot((int)bootflags, NULL);
|
|
}
|
|
|
|
static void
|
|
db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
int mode, t;
|
|
|
|
t = db_read_token();
|
|
if (t == tSLASH) {
|
|
t = db_read_token();
|
|
if (t != tIDENT) {
|
|
bad_modifier:
|
|
db_printf("Bad modifier\n");
|
|
db_flush_lex();
|
|
return;
|
|
}
|
|
if (!strcmp(db_tok_string, "F"))
|
|
mode = 'F';
|
|
else
|
|
goto bad_modifier;
|
|
t = db_read_token();
|
|
} else
|
|
mode = 0;
|
|
|
|
if (t == tIDENT)
|
|
db_sifting(db_tok_string, mode);
|
|
else {
|
|
db_printf("Bad argument (non-string)\n");
|
|
db_flush_lex();
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
|
|
if (count == -1)
|
|
count = 65535;
|
|
|
|
db_stack_trace_print(addr, have_addr, count, modif, db_printf);
|
|
}
|
|
|
|
static void
|
|
db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
|
|
{
|
|
|
|
/*
|
|
* We are leaving DDB, never to return upward.
|
|
* Clear db_recover so that we can debug faults in functions
|
|
* called from cpu_reboot.
|
|
*/
|
|
db_recover = 0;
|
|
cpu_reboot(RB_DUMP, NULL);
|
|
}
|