/* $NetBSD: db_command.c,v 1.160.4.1 2020/01/26 11:28:11 martin Exp $ */ /* * Copyright (c) 1996, 1997, 1998, 1999, 2002, 2009 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Adam Hamsik, and by Andrew Doran. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ /* * Command dispatcher. */ #include __KERNEL_RCSID(0, "$NetBSD: db_command.c,v 1.160.4.1 2020/01/26 11:28:11 martin Exp $"); #ifdef _KERNEL_OPT #include "opt_aio.h" #include "opt_ddb.h" #include "opt_kgdb.h" #include "opt_mqueue.h" #include "opt_inet.h" #include "opt_kernhist.h" #include "opt_ddbparam.h" #include "opt_multiprocessor.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Results of command search. */ #define CMD_EXACT 0 #define CMD_PREFIX 1 #define CMD_NONE 2 #define CMD_AMBIGUOUS 3 /* * Exported global variables */ bool db_cmd_loop_done; label_t *db_recover; db_addr_t db_dot; db_addr_t db_last_addr; db_addr_t db_prev; db_addr_t db_next; /* * New DDB api for adding and removing commands uses three lists, because * we use two types of commands * a) standard commands without subcommands -> reboot * b) show commands which are subcommands of show command -> show aio_jobs * c) if defined machine specific commands * * ddb_add_cmd, ddb_rem_cmd use type (DDB_SHOW_CMD||DDB_BASE_CMD)argument to * add them to representativ lists. */ static const struct db_command db_command_table[]; static const struct db_command db_show_cmds[]; #ifdef DB_MACHINE_COMMANDS /* arch///db_interface.c */ extern const struct db_command db_machine_command_table[]; #endif /* the global queue of all command tables */ TAILQ_HEAD(db_cmd_tbl_en_head, db_cmd_tbl_en); /* TAILQ entry used to register command tables */ struct db_cmd_tbl_en { const struct db_command *db_cmd; /* cmd table */ TAILQ_ENTRY(db_cmd_tbl_en) db_cmd_next; }; /* head of base commands list */ static struct db_cmd_tbl_en_head db_base_cmd_list = TAILQ_HEAD_INITIALIZER(db_base_cmd_list); static struct db_cmd_tbl_en db_base_cmd_builtins = { .db_cmd = db_command_table }; /* head of show commands list */ static struct db_cmd_tbl_en_head db_show_cmd_list = TAILQ_HEAD_INITIALIZER(db_show_cmd_list); static struct db_cmd_tbl_en db_show_cmd_builtins = { .db_cmd = db_show_cmds }; /* head of machine commands list */ static struct db_cmd_tbl_en_head db_mach_cmd_list = TAILQ_HEAD_INITIALIZER(db_mach_cmd_list); #ifdef DB_MACHINE_COMMANDS static struct db_cmd_tbl_en db_mach_cmd_builtins = { .db_cmd = db_machine_command_table }; #endif /* * if 'ed' style: 'dot' is set at start of last item printed, * and '+' points to next line. * Otherwise: 'dot' points to next item, '..' points to last. */ static bool db_ed_style = true; static void db_init_commands(void); static int db_register_tbl_entry(uint8_t type, struct db_cmd_tbl_en *list_ent); static void db_cmd_list(const struct db_cmd_tbl_en_head *); static int db_cmd_search(const char *, struct db_cmd_tbl_en_head *, const struct db_command **); static int db_cmd_search_table(const char *, const struct db_command *, const struct db_command **); static void db_cmd_search_failed(char *, int); static const struct db_command *db_read_command(void); static void db_command(const struct db_command **); static void db_buf_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_event_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_fncall(db_expr_t, bool, db_expr_t, const char *); static void db_help_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_lock_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_show_all_locks(db_expr_t, bool, db_expr_t, const char *); static void db_show_lockstats(db_expr_t, bool, db_expr_t, const char *); static void db_mount_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_mbuf_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_map_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_namecache_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_object_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_page_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_show_all_pages(db_expr_t, bool, db_expr_t, const char *); static void db_pool_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_reboot_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_sifting_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_socket_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_stack_trace_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_sync_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_whatis_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_uvmexp_print_cmd(db_expr_t, bool, db_expr_t, const char *); #ifdef KERNHIST static void db_kernhist_print_cmd(db_expr_t, bool, db_expr_t, const char *); #endif static void db_vnode_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_vnode_lock_print_cmd(db_expr_t, bool, db_expr_t, const char *); static void db_vmem_print_cmd(db_expr_t, bool, db_expr_t, const char *); static const struct db_command db_show_cmds[] = { /*added from all sub cmds*/ { DDB_ADD_CMD("callout", db_show_callout, 0 ,"List all used callout functions.",NULL,NULL) }, { DDB_ADD_CMD("pages", db_show_all_pages, 0 ,"List all used memory pages.",NULL,NULL) }, { DDB_ADD_CMD("proc", db_show_proc, 0 ,"Print process information.",NULL,NULL) }, { DDB_ADD_CMD("procs", db_show_all_procs, 0 ,"List all processes.",NULL,NULL) }, { DDB_ADD_CMD("pools", db_show_all_pools, 0 ,"Show all pools",NULL,NULL) }, { DDB_ADD_CMD("locks", db_show_all_locks, 0 ,"Show all held locks", "[/t]", NULL) }, #ifdef AIO /*added from all sub cmds*/ { DDB_ADD_CMD("aio_jobs", db_show_aio_jobs, 0, "Show aio jobs",NULL,NULL) }, #endif { DDB_ADD_CMD("all", NULL, CS_COMPAT, NULL,NULL,NULL) }, #if defined(INET) { DDB_ADD_CMD("routes", db_show_routes, 0,NULL,NULL,NULL) }, #endif #ifdef _KERNEL { DDB_ADD_CMD("breaks", db_listbreak_cmd, 0, "Display all breaks.",NULL,NULL) }, #endif { DDB_ADD_CMD("buf", db_buf_print_cmd, 0, "Print the struct buf at address.", "[/f] address",NULL) }, { DDB_ADD_CMD("devices", db_show_all_devices, 0,NULL,NULL,NULL) }, { DDB_ADD_CMD("event", db_event_print_cmd, 0, "Print all the non-zero evcnt(9) event counters.", "[/fitm]",NULL) }, { DDB_ADD_CMD("files", db_show_files_cmd, 0, "Print the files open by process at address", "[/f] address", NULL) }, { DDB_ADD_CMD("lock", db_lock_print_cmd, 0,NULL,NULL,NULL) }, { DDB_ADD_CMD("lockstats", db_show_lockstats, 0, "Print statistics of locks", NULL, NULL) }, { DDB_ADD_CMD("map", db_map_print_cmd, 0, "Print the vm_map at address.", "[/f] address",NULL) }, { DDB_ADD_CMD("socket", db_socket_print_cmd, 0,NULL,NULL,NULL) }, { DDB_ADD_CMD("module", db_show_module_cmd, 0, "Print kernel modules", NULL, NULL) }, { DDB_ADD_CMD("mount", db_mount_print_cmd, 0, "Print the mount structure at address.", "[/f] address",NULL) }, #ifdef MQUEUE { DDB_ADD_CMD("mqueue", db_show_mqueue_cmd, 0, "Print the message queues", NULL, NULL) }, #endif { DDB_ADD_CMD("mbuf", db_mbuf_print_cmd, 0,NULL,NULL, "-c prints all mbuf chains") }, { DDB_ADD_CMD("ncache", db_namecache_print_cmd, 0, "Dump the namecache list.", "address",NULL) }, { DDB_ADD_CMD("object", db_object_print_cmd, 0, "Print the vm_object at address.", "[/f] address",NULL) }, { DDB_ADD_CMD("page", db_page_print_cmd, 0, "Print the vm_page at address.", "[/f] address",NULL) }, { DDB_ADD_CMD("panic", db_show_panic, 0, "Print the current panic string",NULL,NULL) }, { DDB_ADD_CMD("pool", db_pool_print_cmd, 0, "Print the pool at address.", "[/clp] address",NULL) }, { DDB_ADD_CMD("registers", db_show_regs, 0, "Display the register set.", "[/u]",NULL) }, { DDB_ADD_CMD("sched_qs", db_show_sched_qs, 0, "Print the state of the scheduler's run queues.", NULL,NULL) }, { DDB_ADD_CMD("uvmexp", db_uvmexp_print_cmd, 0, "Print a selection of UVM counters and statistics.", NULL,NULL) }, #ifdef KERNHIST { DDB_ADD_CMD("kernhist", db_kernhist_print_cmd, 0, "Print the UVM history logs.", NULL,NULL) }, #endif { DDB_ADD_CMD("vnode", db_vnode_print_cmd, 0, "Print the vnode at address.", "[/f] address",NULL) }, { DDB_ADD_CMD("vnode_lock", db_vnode_lock_print_cmd, 0, "Print the vnode having that address as v_lock.", "[/f] address",NULL) }, { DDB_ADD_CMD("vmem", db_vmem_print_cmd, 0, "Print the vmem usage.", "[/a] address", NULL) }, { DDB_ADD_CMD("vmems", db_show_all_vmems, 0, "Show all vmems.", NULL, NULL) }, #ifdef _KERNEL { DDB_ADD_CMD("watches", db_listwatch_cmd, 0, "Display all watchpoints.", NULL,NULL) }, #endif { DDB_ADD_CMD(NULL, NULL, 0,NULL,NULL,NULL) } }; static const struct db_command db_command_table[] = { { DDB_ADD_CMD("b", db_breakpoint_cmd, 0, "Set a breakpoint at address", "[/u] address[,count].",NULL) }, { DDB_ADD_CMD("break", db_breakpoint_cmd, 0, "Set a breakpoint at address", "[/u] address[,count].",NULL) }, { DDB_ADD_CMD("bt", db_stack_trace_cmd, 0, "Show backtrace.", "See help trace.",NULL) }, { DDB_ADD_CMD("c", db_continue_cmd, 0, "Continue execution.", "[/c]",NULL) }, { DDB_ADD_CMD("call", db_fncall, CS_OWN, "Call the function", "address[(expression[,...])]",NULL) }, { DDB_ADD_CMD("callout", db_show_callout, 0, NULL, NULL,NULL ) }, { DDB_ADD_CMD("continue", db_continue_cmd, 0, "Continue execution.", "[/c]",NULL) }, { DDB_ADD_CMD("d", db_delete_cmd, 0, "Delete a breakpoint.", "address | #number",NULL) }, { DDB_ADD_CMD("delete", db_delete_cmd, 0, "Delete a breakpoint.", "address | #number",NULL) }, { DDB_ADD_CMD("dmesg", db_dmesg, 0, "Show kernel message buffer.", "[count]",NULL) }, { DDB_ADD_CMD("dwatch", db_deletewatch_cmd, 0, "Delete the watchpoint.", "address",NULL) }, { DDB_ADD_CMD("examine", db_examine_cmd, CS_SET_DOT, "Display the address locations.", "[/modifier] address[,count]",NULL) }, { DDB_ADD_CMD("exit", db_continue_cmd, 0, "Continue execution.", "[/c]",NULL) }, { DDB_ADD_CMD("help", db_help_print_cmd, CS_OWN|CS_NOREPEAT, "Display help about commands", "Use other commands as arguments.",NULL) }, { DDB_ADD_CMD("kill", db_kill_proc, CS_OWN, "Send a signal to the process","pid[,signal_number]", " pid:\t\t\tthe process id (may need 0t prefix for decimal)\n" " signal_number:\tthe signal to send") }, #ifdef KGDB { DDB_ADD_CMD("kgdb", db_kgdb_cmd, 0, NULL,NULL,NULL) }, #endif { DDB_ADD_CMD("machine",NULL,CS_MACH, "Architecture specific functions.",NULL,NULL) }, { DDB_ADD_CMD("match", db_trace_until_matching_cmd,0, "Stop at the matching return instruction.","See help next",NULL) }, { DDB_ADD_CMD("next", db_trace_until_matching_cmd,0, "Stop at the matching return instruction.","[/p]",NULL) }, { DDB_ADD_CMD("p", db_print_cmd, 0, "Print address according to the format.", "[/axzodurc] address [address ...]",NULL) }, { DDB_ADD_CMD("print", db_print_cmd, 0, "Print address according to the format.", "[/axzodurc] address [address ...]",NULL) }, { DDB_ADD_CMD("ps", db_show_all_procs, 0, "Print all processes.","See show all procs",NULL) }, { DDB_ADD_CMD("quit", db_continue_cmd, 0, "Continue execution.", "[/c]",NULL) }, { DDB_ADD_CMD("reboot", db_reboot_cmd, CS_OWN, "Reboot","0x1 RB_ASKNAME, 0x2 RB_SINGLE, 0x4 RB_NOSYNC, 0x8 RB_HALT," "0x40 RB_KDB, 0x100 RB_DUMP, 0x808 RB_POWERDOWN",NULL) }, { DDB_ADD_CMD("s", db_single_step_cmd, 0, "Single-step count times.","[/p] [,count]",NULL) }, { DDB_ADD_CMD("search", db_search_cmd, CS_OWN|CS_SET_DOT, "Search memory from address for value.", "[/bhl] address value [mask] [,count]",NULL) }, { DDB_ADD_CMD("set", db_set_cmd, CS_OWN, "Set the named variable","$variable [=] expression",NULL) }, { DDB_ADD_CMD("show", NULL, CS_SHOW, "Show kernel stats.", NULL,NULL) }, { DDB_ADD_CMD("sifting", db_sifting_cmd, CS_OWN, "Search the symbol tables ","[/F] string",NULL) }, { DDB_ADD_CMD("step", db_single_step_cmd, 0, "Single-step count times.","[/p] [,count]",NULL) }, { DDB_ADD_CMD("sync", db_sync_cmd, CS_OWN, "Force a crash dump, and then reboot.",NULL,NULL) }, { DDB_ADD_CMD("trace", db_stack_trace_cmd, 0, "Stack trace from frame-address.", "[/u[l]] [frame-address][,count]",NULL) }, { DDB_ADD_CMD("until", db_trace_until_call_cmd,0, "Stop at the next call or return instruction.","[/p]",NULL) }, { DDB_ADD_CMD("w", db_write_cmd, CS_MORE|CS_SET_DOT, "Write the expressions at succeeding locations.", "[/bhl] address expression [expression ...]",NULL) }, { DDB_ADD_CMD("watch", db_watchpoint_cmd, CS_MORE, "Set a watchpoint for a region. ","address[,size]",NULL) }, { DDB_ADD_CMD("whatis", db_whatis_cmd, 0, "Describe what an address is", "address", NULL) }, { DDB_ADD_CMD("write", db_write_cmd, CS_MORE|CS_SET_DOT, "Write the expressions at succeeding locations.", "[/bhl] address expression [expression ...]",NULL) }, { DDB_ADD_CMD("x", db_examine_cmd, CS_SET_DOT, "Display the address locations.", "[/modifier] address[,count]",NULL) }, { DDB_ADD_CMD(NULL, NULL, 0, NULL, NULL, NULL) } }; static const struct db_command *db_last_command = NULL; #if defined(DDB_COMMANDONENTER) char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); #else /* defined(DDB_COMMANDONENTER) */ char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; #endif /* defined(DDB_COMMANDONENTER) */ #define DB_LINE_SEP ';' /* * Execute commandlist after ddb start * This function goes through the command list created from commands and ';' */ static void db_execute_commandlist(const char *cmdlist) { const char *cmd = cmdlist; const struct db_command *dummy = NULL; while (*cmd != '\0') { const char *ep = cmd; while (*ep != '\0' && *ep != DB_LINE_SEP) { ep++; } db_set_line(cmd, ep); db_command(&dummy); cmd = ep; if (*cmd == DB_LINE_SEP) { cmd++; } } } /* Initialize ddb command tables */ void db_init_commands(void) { static bool done = false; if (done) return; done = true; /* register command tables */ (void)db_register_tbl_entry(DDB_BASE_CMD, &db_base_cmd_builtins); #ifdef DB_MACHINE_COMMANDS (void)db_register_tbl_entry(DDB_MACH_CMD, &db_mach_cmd_builtins); #endif (void)db_register_tbl_entry(DDB_SHOW_CMD, &db_show_cmd_builtins); } /* * Add command table to the specified list * Arg: * int type specifies type of command table DDB_SHOW_CMD|DDB_BASE_CMD|DDB_MAC_CMD * *cmd_tbl poiter to static allocated db_command table * * Command table must be NULL terminated array of struct db_command */ int db_register_tbl(uint8_t type, const struct db_command *cmd_tbl) { struct db_cmd_tbl_en *list_ent; /* empty list - ignore */ if (cmd_tbl->name == 0) return 0; /* force builtin commands to be registered first */ db_init_commands(); /* now create a list entry for this table */ list_ent = db_zalloc(sizeof(*list_ent)); if (list_ent == NULL) return ENOMEM; list_ent->db_cmd=cmd_tbl; /* and register it */ return db_register_tbl_entry(type, list_ent); } static int db_register_tbl_entry(uint8_t type, struct db_cmd_tbl_en *list_ent) { struct db_cmd_tbl_en_head *list; switch(type) { case DDB_BASE_CMD: list = &db_base_cmd_list; break; case DDB_SHOW_CMD: list = &db_show_cmd_list; break; case DDB_MACH_CMD: list = &db_mach_cmd_list; break; default: return ENOENT; } TAILQ_INSERT_TAIL(list, list_ent, db_cmd_next); return 0; } /* * Remove command table specified with db_cmd address == cmd_tbl */ int db_unregister_tbl(uint8_t type,const struct db_command *cmd_tbl) { struct db_cmd_tbl_en *list_ent; struct db_cmd_tbl_en_head *list; /* find list on which the entry should live */ switch (type) { case DDB_BASE_CMD: list=&db_base_cmd_list; break; case DDB_SHOW_CMD: list=&db_show_cmd_list; break; case DDB_MACH_CMD: list=&db_mach_cmd_list; break; default: return EINVAL; } TAILQ_FOREACH (list_ent, list, db_cmd_next) { if (list_ent->db_cmd == cmd_tbl){ TAILQ_REMOVE(list, list_ent, db_cmd_next); db_free(list_ent, sizeof(*list_ent)); return 0; } } return ENOENT; } #ifndef _KERNEL #define cnpollc(c) __nothing #endif /* * This function is called via db_trap() or directly from * machine trap code. */ void db_command_loop(void) { label_t db_jmpbuf; label_t *savejmp; /* * Initialize 'prev' and 'next' to dot. */ db_prev = db_dot; db_next = db_dot; db_cmd_loop_done = false; /* Init default command tables add machine, base, show command tables to the list */ db_init_commands(); /* save context for return from ddb */ savejmp = db_recover; db_recover = &db_jmpbuf; (void) setjmp(&db_jmpbuf); /* * Execute default ddb start commands only if this is the * first entry into DDB, in case the start commands fault * and we recurse into here. */ if (!savejmp) db_execute_commandlist(db_cmd_on_enter); (void) setjmp(&db_jmpbuf); while (!db_cmd_loop_done) { if (db_print_position() != 0) db_printf("\n"); db_output_line = 0; cnpollc(1); (void) db_read_line(); cnpollc(0); db_command(&db_last_command); } db_recover = savejmp; } /* * Search command table for command prefix */ static int db_cmd_search_table(const char *name, const struct db_command *table, const struct db_command **cmdp) { const struct db_command *cmd; int result; result = CMD_NONE; *cmdp = NULL; for (cmd = table; cmd->name != 0; cmd++) { const char *lp; const char *rp; lp = name; rp = cmd->name; while (*lp != '\0' && *lp == *rp) { rp++; lp++; } if (*lp != '\0') /* mismatch or extra chars in name */ continue; if (*rp == '\0') { /* exact match */ *cmdp = cmd; return (CMD_EXACT); } /* prefix match: end of name, not end of command */ if (result == CMD_NONE) { result = CMD_PREFIX; *cmdp = cmd; } else if (result == CMD_PREFIX) { result = CMD_AMBIGUOUS; *cmdp = NULL; } } return (result); } /* * Search list of command tables for command */ static int db_cmd_search(const char *name, struct db_cmd_tbl_en_head *list_head, const struct db_command **cmdp) { struct db_cmd_tbl_en *list_ent; const struct db_command *found_command; bool accept_prefix_match; int result; result = CMD_NONE; found_command = NULL; accept_prefix_match = true; TAILQ_FOREACH(list_ent, list_head, db_cmd_next) { const struct db_command *cmd; int found; found = db_cmd_search_table(name, list_ent->db_cmd, &cmd); if (found == CMD_EXACT) { result = CMD_EXACT; found_command = cmd; break; } if (found == CMD_PREFIX) { if (accept_prefix_match) { /* * Continue search, but note current result * in case we won't find anything else. */ accept_prefix_match = false; result = CMD_PREFIX; found_command = cmd; } else { /* * Watch out for globally ambiguous * prefix match that is not locally * ambiguous - with one match in one * table and another match(es) in * another table. */ result = CMD_AMBIGUOUS; found_command = NULL; } } else if (found == CMD_AMBIGUOUS) { accept_prefix_match = false; result = CMD_AMBIGUOUS; found_command = NULL; } } *cmdp = found_command; return result; } static void db_cmd_search_failed(char *name, int search_result) { if (search_result == CMD_NONE) db_printf("No such command: %s\n", name); else db_printf("Ambiguous command: %s\n", name); } /* * List commands to the console. */ static void db_cmd_list(const struct db_cmd_tbl_en_head *list) { struct db_cmd_tbl_en *list_ent; const struct db_command *table; size_t i, j, w, columns, lines, numcmds, width=0; const char *p; TAILQ_FOREACH(list_ent,list,db_cmd_next) { table = list_ent->db_cmd; for (i = 0; table[i].name != NULL; i++) { w = strlen(table[i].name); if (w > width) width = w; } } width = DB_NEXT_TAB(width); columns = db_max_width / width; if (columns == 0) columns = 1; TAILQ_FOREACH(list_ent,list,db_cmd_next) { table = list_ent->db_cmd; for (numcmds = 0; table[numcmds].name != NULL; numcmds++) ; lines = (numcmds + columns - 1) / columns; for (i = 0; i < lines; i++) { for (j = 0; j < columns; j++) { p = table[j * lines + i].name; if (p) db_printf("%s", p); if (j * lines + i + lines >= numcmds) { db_putchar('\n'); break; } if (p) { w = strlen(p); while (w < width) { w = DB_NEXT_TAB(w); db_putchar('\t'); } } } } } return; } /* * Read complete command with all subcommands, starting with current * db_tok_string. If subcommand is missing, print the list of all * subcommands. If command/subcommand is not found, print an error * message. Returns pointer to "leaf" command or NULL. */ static const struct db_command * db_read_command(void) { const struct db_command *command; struct db_cmd_tbl_en_head *list; int found; int t; list = &db_base_cmd_list; do { found = db_cmd_search(db_tok_string, list, &command); if (command == NULL) { db_cmd_search_failed(db_tok_string, found); db_flush_lex(); return NULL; } if (command->flag == CS_SHOW) list = &db_show_cmd_list; else if (command->flag == CS_MACH) list = &db_mach_cmd_list; else if (command->flag == CS_COMPAT) /* same list */; else break; /* expect no more subcommands */ t = db_read_token(); /* read subcommand */ if (t != tIDENT) { /* if none given - just print all of them */ db_cmd_list(list); db_flush_lex(); return NULL; } } while (list != NULL); return command; } /* * Parse command line and execute apropriate function. */ static void db_command(const struct db_command **last_cmdp) { static db_expr_t last_count = 0; int t; const struct db_command *command; db_expr_t addr, count; bool have_addr; char modif[TOK_STRING_SIZE]; command = NULL; have_addr = false; count = -1; t = db_read_token(); if ((t == tEOL) || (t == tCOMMA)) { /* * An empty line repeats last command, at 'next'. * Only a count repeats the last command with the new count. */ command = *last_cmdp; if (!command) return; addr = (db_expr_t)db_next; if (t == tCOMMA) { if (!db_expression(&count)) { db_printf("Count missing\n"); db_flush_lex(); return; } } else count = last_count; modif[0] = '\0'; db_skip_to_eol(); } else if (t == tEXCL) { db_fncall(0, 0, 0, NULL); return; } else if (t != tIDENT) { db_printf("?\n"); db_flush_lex(); return; } else { command = db_read_command(); if (command == NULL) return; if ((command->flag & CS_OWN) == 0) { /* * Standard syntax: * command [/modifier] [addr] [,count] */ t = db_read_token(); /* get modifier */ if (t == tSLASH) { t = db_read_token(); if (t != tIDENT) { db_printf("Bad modifier\n"); db_flush_lex(); return; } /* save modifier */ strlcpy(modif, db_tok_string, sizeof(modif)); } else { db_unread_token(t); modif[0] = '\0'; } if (db_expression(&addr)) { /*get address*/ db_dot = (db_addr_t) addr; db_last_addr = db_dot; have_addr = true; } else { addr = (db_expr_t) db_dot; } t = db_read_token(); if (t == tCOMMA) { /*Get count*/ if (!db_expression(&count)) { db_printf("Count missing\n"); db_flush_lex(); return; } } else { db_unread_token(t); } if ((command->flag & CS_MORE) == 0) { db_skip_to_eol(); } } } if (command != NULL && command->flag & CS_NOREPEAT) { *last_cmdp = NULL; last_count = 0; } else { *last_cmdp = command; last_count = count; } if (command != NULL) { /* * Execute the command. */ if (command->fcn != NULL) (*command->fcn)(addr, have_addr, count, modif); if (command->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; } } } /* * Print help for commands */ static void db_help_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { const struct db_command *command; int t; t = db_read_token(); /* is there another command after the "help"? */ if (t != tIDENT) { /* print base commands */ db_cmd_list(&db_base_cmd_list); return; } command = db_read_command(); if (command == NULL) return; #ifdef DDB_VERBOSE_HELP db_printf("Command: %s\n", command->name); if (command->cmd_descr != NULL) db_printf(" Description: %s\n", command->cmd_descr); if (command->cmd_arg != NULL) db_printf(" Arguments: %s\n", command->cmd_arg); if (command->cmd_arg_help != NULL) db_printf(" Arguments description:\n%s\n", command->cmd_arg_help); if ((command->cmd_arg == NULL) && (command->cmd_descr == NULL)) db_printf(" No help message.\n"); #endif db_skip_to_eol(); } /*ARGSUSED*/ static void db_map_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL bool full = false; if (modif[0] == 'f') full = true; if (have_addr == false) addr = (db_expr_t)(uintptr_t)db_read_ptr("kernel_map"); uvm_map_printit((struct vm_map *)(uintptr_t) addr, full, db_printf); #endif /* XXX CRASH(8) */ } /*ARGSUSED*/ static void db_object_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ bool full = false; if (modif[0] == 'f') full = true; uvm_object_printit((struct uvm_object *)(uintptr_t) addr, full, db_printf); #endif } /*ARGSUSED*/ static void db_page_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ bool full = false; if (modif[0] == 'f') full = true; uvm_page_printit((struct vm_page *)(uintptr_t) addr, full, db_printf); #endif } /*ARGSUSED*/ static void db_show_all_pages(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ uvm_page_printall(db_printf); #endif } /*ARGSUSED*/ static void db_buf_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ bool full = false; if (modif[0] == 'f') full = true; vfs_buf_print((struct buf *)(uintptr_t) addr, full, db_printf); #endif } /*ARGSUSED*/ static void db_event_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { bool showzero = false; bool showall = true; bool showintr = false; bool showtrap = false; bool showmisc = false; struct evcnt ev, *evp; char buf[80]; int i; i = 0; while (modif[i]) { switch (modif[i]) { case 'f': showzero = true; break; case 'i': showintr = true; showall = false; break; case 't': showtrap = true; showall = false; break; case 'm': showmisc = true; showall = false; break; } i++; } if (showall) showmisc = showintr = showtrap = true; evp = (struct evcnt *)db_read_ptr("allevents"); while (evp != NULL) { db_read_bytes((db_addr_t)evp, sizeof(ev), (char *)&ev); evp = ev.ev_list.tqe_next; if (ev.ev_count == 0 && !showzero) continue; if (ev.ev_type == EVCNT_TYPE_INTR && !showintr) continue; if (ev.ev_type == EVCNT_TYPE_TRAP && !showtrap) continue; if (ev.ev_type == EVCNT_TYPE_MISC && !showmisc) continue; db_read_bytes((db_addr_t)ev.ev_group, ev.ev_grouplen + 1, buf); db_printf("evcnt type %d: %s ", ev.ev_type, buf); db_read_bytes((db_addr_t)ev.ev_name, ev.ev_namelen + 1, buf); db_printf("%s = %lld\n", buf, (long long)ev.ev_count); } } /*ARGSUSED*/ static void db_vnode_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ bool full = false; if (modif[0] == 'f') full = true; vfs_vnode_print((struct vnode *)(uintptr_t) addr, full, db_printf); #endif } /*ARGSUSED*/ static void db_vnode_lock_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ bool full = false; if (modif[0] == 'f') full = true; vfs_vnode_lock_print((struct vnode *)(uintptr_t) addr, full, db_printf); #endif } /*ARGSUSED*/ static void db_vmem_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ vmem_print((uintptr_t) addr, modif, db_printf); #endif } static void db_mount_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ bool full = false; if (modif[0] == 'f') full = true; vfs_mount_print((struct mount *)(uintptr_t) addr, full, db_printf); #endif } /*ARGSUSED*/ static void db_mbuf_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ m_print((const struct mbuf *)(uintptr_t) addr, modif, db_printf); #endif } /*ARGSUSED*/ static void db_pool_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ pool_printit((struct pool *)(uintptr_t) addr, modif, db_printf); #endif } /*ARGSUSED*/ static void db_namecache_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ namecache_print((struct vnode *)(uintptr_t) addr, db_printf); #endif } /*ARGSUSED*/ static void db_uvmexp_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ uvmexp_print(db_printf); #endif } /*ARGSUSED */ static void db_socket_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ socket_print(modif, db_printf); #endif } #ifdef KERNHIST /*ARGSUSED*/ static void db_kernhist_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { kernhist_print((void *)(uintptr_t)addr, count, modif, db_printf); } #endif /*ARGSUSED*/ static void db_lock_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ lockdebug_lock_print(have_addr ? (void *)(uintptr_t)addr : NULL, db_printf); #endif } static void db_show_all_locks(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ lockdebug_show_all_locks(db_printf, modif); #endif } static void db_show_lockstats(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* XXX CRASH(8) */ lockdebug_show_lockstats(db_printf); #endif } /* * Call random function: * !expr(arg,arg,arg) */ /*ARGSUSED*/ static void db_fncall(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL 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, ...))(uintptr_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)); #else /* _KERNEL */ db_printf("This command can only be used in-kernel.\n"); #endif /* _KERNEL */ } static void db_reboot_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL 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; /* Avoid all mutex errors */ lockdebug_dismiss(); panicstr = "reboot forced via kernel debugger"; /* Make it possible to break into the debugger again */ spl0(); cpu_reboot((int)bootflags, NULL); #else /* _KERNEL */ db_printf("This command can only be used in-kernel.\n"); #endif /* _KERNEL */ } static void db_sifting_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const 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, bool have_addr, db_expr_t count, const char *modif) { register const char *cp = modif; register char c; void (*pr)(const char *, ...); pr = db_printf; while ((c = *cp++) != 0) if (c == 'l') pr = (void (*)(const char *, ...))printf; if (count == -1) count = 65535; db_stack_trace_print(addr, have_addr, count, modif, pr); } static void db_sync_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) { #ifdef _KERNEL /* * 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; panicstr = "dump forced via kernel debugger"; cpu_reboot(RB_DUMP, NULL); #else /* _KERNEL */ db_printf("This command can only be used in-kernel.\n"); #endif /* _KERNEL */ } /* * Describe what an address is */ void db_whatis_cmd(db_expr_t address, bool have_addr, db_expr_t count, const char *modif) { const uintptr_t addr = (uintptr_t)address; db_lwp_whatis(addr, db_printf); #ifdef _KERNEL /* XXX CRASH(8) */ pool_whatis(addr, db_printf); vmem_whatis(addr, db_printf); uvm_whatis(addr, db_printf); module_whatis(addr, db_printf); #endif }