/* $OpenBSD: db_command.c,v 1.20 2001/04/18 23:17:25 art Exp $ */ /* $NetBSD: db_command.c,v 1.20 1996/03/30 22:30:05 christos Exp $ */ /* * Mach Operating System * Copyright (c) 1993,1992,1991,1990 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 Mellon * the rights to redistribute these changes. */ /* * Command dispatcher. */ #include <sys/param.h> #include <sys/systm.h> #include <sys/proc.h> #include <sys/reboot.h> #include <sys/extent.h> #include <vm/vm.h> #include <machine/db_machdep.h> /* type definitions */ #include <ddb/db_lex.h> #include <ddb/db_output.h> #include <ddb/db_command.h> #include <ddb/db_break.h> #include <ddb/db_watch.h> #include <ddb/db_run.h> #include <ddb/db_variables.h> #include <ddb/db_interface.h> #include <ddb/db_sym.h> #include <ddb/db_extern.h> #include <vm/vm.h> #ifdef UVM #include <uvm/uvm_extern.h> #include <uvm/uvm_ddb.h> #endif /* * Exported global variables */ boolean_t db_cmd_loop_done; label_t *db_recover; /* * 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. */ boolean_t db_ed_style = TRUE; /* * Utility routine - discard tokens through end-of-line. */ void db_skip_to_eol() { int t; do { t = db_read_token(); } while (t != tEOL); } /* * Results of command search. */ #define CMD_UNIQUE 0 #define CMD_FOUND 1 #define CMD_NONE 2 #define CMD_AMBIGUOUS 3 /* * Search for command prefix. */ int db_cmd_search(name, table, cmdp) char *name; struct db_command *table; struct db_command **cmdp; /* out */ { struct db_command *cmd; int result = CMD_NONE; for (cmd = table; cmd->name != 0; cmd++) { register char *lp; register char *rp; register int c; lp = name; rp = cmd->name; while ((c = *lp) == *rp) { if (c == 0) { /* complete match */ *cmdp = cmd; return (CMD_UNIQUE); } lp++; rp++; } if (c == 0) { /* end of name, not end of command - partial match */ if (result == CMD_FOUND) { result = CMD_AMBIGUOUS; /* but keep looking for a full match - this lets us match single letters */ } else { *cmdp = cmd; result = CMD_FOUND; } } } return (result); } void db_cmd_list(table) struct db_command *table; { register struct db_command *cmd; for (cmd = table; cmd->name != 0; cmd++) { db_printf("%-12s", cmd->name); db_end_line(12); } } void db_command(last_cmdp, cmd_table) struct db_command **last_cmdp; /* IN_OUT */ struct db_command *cmd_table; { struct db_command *cmd; int t; char modif[TOK_STRING_SIZE]; db_expr_t addr, count; boolean_t have_addr = FALSE; int result; t = db_read_token(); if (t == tEOL) { /* empty line repeats last command, at 'next' */ cmd = *last_cmdp; addr = (db_expr_t)db_next; have_addr = FALSE; count = 1; modif[0] = '\0'; } else if (t == tEXCL) { db_fncall(0, 0, 0, NULL); return; } else if (t != tIDENT) { db_printf("?\n"); db_flush_lex(); return; } else { /* * Search for command */ while (cmd_table) { result = db_cmd_search(db_tok_string, cmd_table, &cmd); switch (result) { case CMD_NONE: db_printf("No such command\n"); db_flush_lex(); return; case CMD_AMBIGUOUS: db_printf("Ambiguous\n"); db_flush_lex(); return; default: break; } if ((cmd_table = cmd->more) != 0) { t = db_read_token(); if (t != tIDENT) { db_cmd_list(cmd_table); db_flush_lex(); return; } } } if ((cmd->flag & CS_OWN) == 0) { /* * Standard syntax: * command [/modifier] [addr] [,count] */ t = db_read_token(); if (t == tSLASH) { t = db_read_token(); if (t != tIDENT) { db_printf("Bad modifier\n"); db_flush_lex(); return; } db_strcpy(modif, db_tok_string); } else { db_unread_token(t); modif[0] = '\0'; } if (db_expression(&addr)) { db_dot = (db_addr_t) addr; db_last_addr = db_dot; 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 != 0) { /* * Execute the command. */ (*cmd->fcn)(addr, have_addr, count, modif); 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; } } } /*ARGSUSED*/ void db_map_print_cmd(addr, have_addr, count, modif) db_expr_t addr; int have_addr; db_expr_t count; char * modif; { boolean_t full = FALSE; if (modif[0] == 'f') full = TRUE; #if defined(UVM) uvm_map_printit((vm_map_t) addr, full, db_printf); #else _vm_map_print((vm_map_t) addr, full, db_printf); #endif } /*ARGSUSED*/ void db_malloc_print_cmd(addr, have_addr, count, modif) db_expr_t addr; int have_addr; db_expr_t count; char * modif; { #if defined(MALLOC_DEBUG) extern void debug_malloc_printit __P((int (*) __P((const char *, ...)), vaddr_t)); if (!have_addr) addr = 0; debug_malloc_printit(db_printf, (vaddr_t)addr); #else db_printf("Malloc debugging not enabled.\n"); #endif } /*ARGSUSED*/ void db_object_print_cmd(addr, have_addr, count, modif) db_expr_t addr; int have_addr; db_expr_t count; char * modif; { boolean_t full = FALSE; if (modif[0] == 'f') full = TRUE; #if defined(UVM) uvm_object_printit((struct uvm_object *) addr, full, db_printf); #else _vm_object_print((vm_object_t) addr, full, db_printf); #endif } /*ARGSUSED*/ void db_extent_print_cmd(addr, have_addr, count, modif) db_expr_t addr; int have_addr; db_expr_t count; char * modif; { extent_print_all(); } /* * 'show' commands */ struct db_command db_show_all_cmds[] = { { "procs", db_show_all_procs, 0, NULL }, { "callout", db_show_callout, 0, NULL }, { NULL, NULL, 0, NULL } }; struct db_command db_show_cmds[] = { { "all", NULL, 0, db_show_all_cmds }, { "registers", db_show_regs, 0, NULL }, { "breaks", db_listbreak_cmd, 0, NULL }, { "watches", db_listwatch_cmd, 0, NULL }, { "map", db_map_print_cmd, 0, NULL }, { "object", db_object_print_cmd, 0, NULL }, { "extents", db_extent_print_cmd, 0, NULL }, { "malloc", db_malloc_print_cmd, 0, NULL }, { NULL, NULL, 0, NULL, } }; struct db_command db_boot_cmds[] = { { "sync", db_boot_sync_cmd, 0, 0 }, { "crash", db_boot_crash_cmd, 0, 0 }, { "dump", db_boot_dump_cmd, 0, 0 }, { "halt", db_boot_halt_cmd, 0, 0 }, { NULL, } }; struct db_command db_command_table[] = { #ifdef DB_MACHINE_COMMANDS /* this must be the first entry, if it exists */ { "machine", NULL, 0, NULL}, #endif { "print", db_print_cmd, 0, NULL }, { "examine", db_examine_cmd, CS_SET_DOT, NULL }, { "x", db_examine_cmd, CS_SET_DOT, NULL }, { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, { "set", db_set_cmd, CS_OWN, NULL }, { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, { "delete", db_delete_cmd, 0, NULL }, { "d", db_delete_cmd, 0, NULL }, { "break", db_breakpoint_cmd, 0, NULL }, { "dwatch", db_deletewatch_cmd, 0, NULL }, { "watch", db_watchpoint_cmd, CS_MORE, NULL }, { "step", db_single_step_cmd, 0, NULL }, { "s", db_single_step_cmd, 0, NULL }, { "continue", db_continue_cmd, 0, NULL }, { "c", db_continue_cmd, 0, NULL }, { "until", db_trace_until_call_cmd,0, NULL }, { "next", db_trace_until_matching_cmd,0, NULL }, { "match", db_trace_until_matching_cmd,0, NULL }, { "trace", db_stack_trace_cmd, 0, NULL }, { "call", db_fncall, CS_OWN, NULL }, { "ps", db_show_all_procs, 0, NULL }, { "callout", db_show_callout, 0, NULL }, { "show", NULL, 0, db_show_cmds }, { "boot", NULL, 0, db_boot_cmds }, { "help", db_help_cmd, 0, NULL }, { "hangman", db_hangman, 0, NULL }, { NULL, NULL, 0, NULL } }; #ifdef DB_MACHINE_COMMANDS /* this function should be called to install the machine dependent commands. It should be called before the debugger is enabled */ void db_machine_commands_install(ptr) struct db_command *ptr; { db_command_table[0].more = ptr; return; } #endif struct db_command *db_last_command = 0; void db_help_cmd(addr, haddr, count, modif) db_expr_t addr; int haddr; db_expr_t count; char *modif; { db_cmd_list(db_command_table); } void db_command_loop() { label_t db_jmpbuf; label_t *savejmp; extern int db_output_line; /* * Initialize 'prev' and 'next' to dot. */ db_prev = db_dot; db_next = db_dot; db_cmd_loop_done = 0; savejmp = db_recover; db_recover = &db_jmpbuf; (void) setjmp(&db_jmpbuf); while (!db_cmd_loop_done) { if (db_print_position() != 0) db_printf("\n"); db_output_line = 0; db_printf("ddb> "); (void) db_read_line(); db_command(&db_last_command, db_command_table); } db_recover = savejmp; } void db_error(s) char *s; { if (s) db_printf(s); db_flush_lex(); longjmp(db_recover); } /* * Call random function: * !expr(arg,arg,arg) */ /*ARGSUSED*/ void db_fncall(addr, have_addr, count, modif) 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) __P((db_expr_t, ...)); int t; if (!db_expression(&fn_addr)) { db_printf("Bad function\n"); db_flush_lex(); return; } func = (db_expr_t (*) __P((db_expr_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("%#n\n", retval); } void db_boot_sync_cmd(addr, haddr, count, modif) db_expr_t addr; int haddr; db_expr_t count; char *modif; { boot(RB_AUTOBOOT | RB_TIMEBAD); } void db_boot_crash_cmd(addr, haddr, count, modif) db_expr_t addr; int haddr; db_expr_t count; char *modif; { boot(RB_NOSYNC | RB_DUMP | RB_TIMEBAD); } void db_boot_dump_cmd(addr, haddr, count, modif) db_expr_t addr; int haddr; db_expr_t count; char *modif; { boot(RB_DUMP | RB_TIMEBAD); } void db_boot_halt_cmd(addr, haddr, count, modif) db_expr_t addr; int haddr; db_expr_t count; char *modif; { boot(RB_NOSYNC | RB_HALT | RB_TIMEBAD); }