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freebsd-skq/sys/ddb/ddb.h
sam 05a7094fc1 Make ddb command registration dynamic so modules can extend 
the command set (only so long as the module is present):
o add db_command_register and db_command_unregister to add and remove
  commands, respectively
o replace linker sets with SYSINIT's (and SYSUINIT's) that register
  commands
o expose 3 list heads: db_cmd_table, db_show_table, and db_show_all_table
  for registering top-level commands, show operands, and show all operands,
  respectively

While here also:
o sort command lists
o add DB_ALIAS, DB_SHOW_ALIAS, and DB_SHOW_ALL_ALIAS to add aliases
  for existing commands
o add "show all trace" as an alias for "show alltrace"
o add "show all locks" as an alias for "show alllocks"

Submitted by:	Guillaume Ballet <gballet@gmail.com> (original version)
Reviewed by:	jhb
MFC after:	1 month
2008-09-15 22:45:14 +00:00

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/*-
* Copyright (c) 1993, Garrett A. Wollman.
* Copyright (c) 1993, University of Vermont and State Agricultural College.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Necessary declarations for the `ddb' kernel debugger.
*/
#ifndef _DDB_DDB_H_
#define _DDB_DDB_H_
#ifdef SYSCTL_DECL
SYSCTL_DECL(_debug_ddb);
#endif
#include <machine/db_machdep.h> /* type definitions */
#include <sys/queue.h> /* LIST_* */
#include <sys/kernel.h> /* SYSINIT */
#ifndef DB_MAXARGS
#define DB_MAXARGS 10
#endif
#ifndef DB_MAXLINE
#define DB_MAXLINE 120
#endif
#ifndef DB_MAXSCRIPTS
#define DB_MAXSCRIPTS 8
#endif
#ifndef DB_MAXSCRIPTNAME
#define DB_MAXSCRIPTNAME 32
#endif
#ifndef DB_MAXSCRIPTLEN
#define DB_MAXSCRIPTLEN 128
#endif
#ifndef DB_MAXSCRIPTRECURSION
#define DB_MAXSCRIPTRECURSION 3
#endif
#ifndef DB_CALL
#define DB_CALL db_fncall_generic
#else
int DB_CALL(db_expr_t, db_expr_t *, int, db_expr_t[]);
#endif
/*
* There are three "command tables":
* - One for simple commands; a list of these is displayed
* by typing 'help' at the debugger prompt.
* - One for sub-commands of 'show'; to see this type 'show'
* without any arguments.
* - The last one for sub-commands of 'show all'; type 'show all'
* without any argument to get a list.
*/
struct command;
LIST_HEAD(command_table, command);
extern struct command_table db_cmd_table;
extern struct command_table db_show_table;
extern struct command_table db_show_all_table;
/*
* Type signature for a function implementing a ddb command.
*/
typedef void db_cmdfcn_t(db_expr_t addr, boolean_t have_addr, db_expr_t count,
char *modif);
/*
* Command table entry.
*/
struct command {
char * name; /* command name */
db_cmdfcn_t *fcn; /* function to call */
int flag; /* extra info: */
#define CS_OWN 0x1 /* non-standard syntax */
#define CS_MORE 0x2 /* standard syntax, but may have other words
* at end */
#define CS_SET_DOT 0x100 /* set dot after command */
struct command_table *more; /* another level of command */
LIST_ENTRY(command) next; /* next entry in the command table */
};
/*
* Arrange for the specified ddb command to be defined and
* bound to the specified function. Commands can be defined
* in modules in which case they will be available only when
* the module is loaded.
*/
#define _DB_SET(_suffix, _name, _func, list, _flag, _more) \
static struct command __CONCAT(_name,_suffix) = { \
.name = __STRING(_name), \
.fcn = _func, \
.flag = _flag, \
.more = _more \
}; \
static void __CONCAT(__CONCAT(_name,_suffix),_add)(void *arg __unused) \
{ db_command_register(&list, &__CONCAT(_name,_suffix)); } \
SYSINIT(__CONCAT(_name,_suffix), SI_SUB_KLD, SI_ORDER_ANY, \
__CONCAT(__CONCAT(_name,_suffix),_add), NULL); \
static void __CONCAT(__CONCAT(_name,_suffix),_del)(void *arg __unused) \
{ db_command_unregister(&list, &__CONCAT(_name,_suffix)); } \
SYSUNINIT(__CONCAT(_name,_suffix), SI_SUB_KLD, SI_ORDER_ANY, \
__CONCAT(__CONCAT(_name,_suffix),_del), NULL);
/*
* Like _DB_SET but also create the function declaration which
* must be followed immediately by the body; e.g.
* _DB_FUNC(_cmd, panic, db_panic, db_cmd_table, 0, NULL)
* {
* ...panic implementation...
* }
*
* This macro is mostly used to define commands placed in one of
* the ddb command tables; see DB_COMMAND, etc. below.
*/
#define _DB_FUNC(_suffix, _name, _func, list, _flag, _more) \
static db_cmdfcn_t _func; \
_DB_SET(_suffix, _name, _func, list, _flag, _more); \
static void \
_func(db_expr_t addr, boolean_t have_addr, db_expr_t count, char *modif)
/* common idom provided for backwards compatibility */
#define DB_FUNC(_name, _func, list, _flag, _more) \
_DB_FUNC(_cmd, _name, _func, list, _flag, _more)
#define DB_COMMAND(cmd_name, func_name) \
_DB_FUNC(_cmd, cmd_name, func_name, db_cmd_table, 0, NULL)
#define DB_ALIAS(alias_name, func_name) \
_DB_SET(_cmd, alias_name, func_name, db_cmd_table, 0, NULL)
#define DB_SHOW_COMMAND(cmd_name, func_name) \
_DB_FUNC(_show, cmd_name, func_name, db_show_table, 0, NULL)
#define DB_SHOW_ALIAS(alias_name, func_name) \
_DB_SET(_show, alias_name, func_name, db_show_table, 0, NULL)
#define DB_SHOW_ALL_COMMAND(cmd_name, func_name) \
_DB_FUNC(_show_all, cmd_name, func_name, db_show_all_table, 0, NULL)
#define DB_SHOW_ALL_ALIAS(alias_name, func_name) \
_DB_SET(_show_all, alias_name, func_name, db_show_all_table, 0, NULL)
extern db_expr_t db_maxoff;
extern int db_indent;
extern int db_inst_count;
extern int db_load_count;
extern int db_store_count;
extern volatile int db_pager_quit;
extern db_expr_t db_radix;
extern db_expr_t db_max_width;
extern db_expr_t db_tab_stop_width;
extern db_expr_t db_lines_per_page;
struct thread;
struct vm_map;
void db_check_interrupt(void);
void db_clear_watchpoints(void);
db_addr_t db_disasm(db_addr_t loc, boolean_t altfmt);
/* instruction disassembler */
void db_error(const char *s);
int db_expression(db_expr_t *valuep);
int db_get_variable(db_expr_t *valuep);
void db_iprintf(const char *,...) __printflike(1, 2);
struct proc *db_lookup_proc(db_expr_t addr);
struct thread *db_lookup_thread(db_expr_t addr, boolean_t check_pid);
struct vm_map *db_map_addr(vm_offset_t);
boolean_t db_map_current(struct vm_map *);
boolean_t db_map_equal(struct vm_map *, struct vm_map *);
int db_md_set_watchpoint(db_expr_t addr, db_expr_t size);
int db_md_clr_watchpoint(db_expr_t addr, db_expr_t size);
void db_md_list_watchpoints(void);
void db_print_loc_and_inst(db_addr_t loc);
void db_print_thread(void);
void db_printf(const char *fmt, ...) __printflike(1, 2);
int db_read_bytes(vm_offset_t addr, size_t size, char *data);
/* machine-dependent */
int db_readline(char *lstart, int lsize);
void db_restart_at_pc(boolean_t watchpt);
int db_set_variable(db_expr_t value);
void db_set_watchpoints(void);
void db_skip_to_eol(void);
boolean_t db_stop_at_pc(boolean_t *is_breakpoint);
#define db_strcpy strcpy
void db_trace_self(void);
int db_trace_thread(struct thread *, int);
int db_value_of_name(const char *name, db_expr_t *valuep);
int db_write_bytes(vm_offset_t addr, size_t size, char *data);
void db_command_register(struct command_table *, struct command *);
void db_command_unregister(struct command_table *, struct command *);
db_cmdfcn_t db_breakpoint_cmd;
db_cmdfcn_t db_capture_cmd;
db_cmdfcn_t db_continue_cmd;
db_cmdfcn_t db_delete_cmd;
db_cmdfcn_t db_deletehwatch_cmd;
db_cmdfcn_t db_deletewatch_cmd;
db_cmdfcn_t db_examine_cmd;
db_cmdfcn_t db_hwatchpoint_cmd;
db_cmdfcn_t db_listbreak_cmd;
db_cmdfcn_t db_scripts_cmd;
db_cmdfcn_t db_print_cmd;
db_cmdfcn_t db_ps;
db_cmdfcn_t db_run_cmd;
db_cmdfcn_t db_script_cmd;
db_cmdfcn_t db_search_cmd;
db_cmdfcn_t db_set_cmd;
db_cmdfcn_t db_set_thread;
db_cmdfcn_t db_show_regs;
db_cmdfcn_t db_show_threads;
db_cmdfcn_t db_single_step_cmd;
db_cmdfcn_t db_textdump_cmd;
db_cmdfcn_t db_trace_until_call_cmd;
db_cmdfcn_t db_trace_until_matching_cmd;
db_cmdfcn_t db_unscript_cmd;
db_cmdfcn_t db_watchpoint_cmd;
db_cmdfcn_t db_write_cmd;
/*
* Interface between DDB and the DDB output capture facility.
*/
struct dumperinfo;
void db_capture_dump(struct dumperinfo *di);
void db_capture_enterpager(void);
void db_capture_exitpager(void);
void db_capture_write(char *buffer, u_int buflen);
void db_capture_writech(char ch);
/*
* Interface between DDB and the script facility.
*/
void db_script_kdbenter(const char *eventname); /* KDB enter event. */
/*
* Interface between DDB and the textdump facility.
*
* Text dump blocks are of a fixed size; textdump_block_buffer is a
* statically allocated buffer that code interacting with textdumps can use
* to prepare and hold a pending block in when calling writenextblock().
*/
#define TEXTDUMP_BLOCKSIZE 512
extern char textdump_block_buffer[TEXTDUMP_BLOCKSIZE];
void textdump_mkustar(char *block_buffer, const char *filename,
u_int size);
void textdump_restoreoff(off_t offset);
void textdump_saveoff(off_t *offsetp);
int textdump_writenextblock(struct dumperinfo *di, char *buffer);
/*
* Interface between the kernel and textdumps.
*/
extern int textdump_pending; /* Call textdump_dumpsys() instead. */
void textdump_dumpsys(struct dumperinfo *di);
#endif /* !_DDB_DDB_H_ */
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