diff options
Diffstat (limited to 'ddb/db_command.c')
| -rw-r--r-- | ddb/db_command.c | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/ddb/db_command.c b/ddb/db_command.c new file mode 100644 index 00000000..50a02bd4 --- /dev/null +++ b/ddb/db_command.c @@ -0,0 +1,597 @@ +/* + * Mach Operating System + * Copyright (c) 1991 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. + */ +/* + * Author: David B. Golub, Carnegie Mellon University + * Date: 7/90 + */ + +#include "mach_kdb.h" +#if MACH_KDB + +/* + * Command dispatcher. + */ +#include <cpus.h> +#include <norma_ipc.h> +#include <norma_vm.h> + +#include <mach/boolean.h> +#include <kern/strings.h> +#include <machine/db_machdep.h> + +#include <ddb/db_lex.h> +#include <ddb/db_output.h> +#include <ddb/db_command.h> +#include <ddb/db_task_thread.h> + +#include <machine/setjmp.h> +#include <kern/thread.h> +#include <ipc/ipc_pset.h> /* 4proto */ +#include <ipc/ipc_port.h> /* 4proto */ + + + +/* + * Exported global variables + */ +boolean_t db_cmd_loop_done; +jmp_buf_t *db_recover = 0; +db_addr_t db_dot; +db_addr_t db_last_addr; +db_addr_t db_prev; +db_addr_t db_next; + +/* + * 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; + +/* + * Results of command search. + */ +#define CMD_UNIQUE 0 +#define CMD_FOUND 1 +#define CMD_NONE 2 +#define CMD_AMBIGUOUS 3 +#define CMD_HELP 4 + +/* + * 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; + } + } + } + if (result == CMD_NONE) { + /* check for 'help' */ + if (!strncmp(name, "help", strlen(name))) + result = CMD_HELP; + } + 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(); + } +} + +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 || t == tSEMI_COLON) { + /* empty line repeats last command, at 'next' */ + cmd = *last_cmdp; + addr = (db_expr_t)db_next; + have_addr = FALSE; + count = 1; + modif[0] = '\0'; + if (t == tSEMI_COLON) + db_unread_token(t); + } + else if (t == tEXCL) { + void db_fncall(); + db_fncall(); + 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: + if (db_exec_macro(db_tok_string) == 0) + return; + db_printf("No such command \"%s\"\n", db_tok_string); + db_flush_lex(); + return; + case CMD_AMBIGUOUS: + db_printf("Ambiguous\n"); + db_flush_lex(); + return; + case CMD_HELP: + db_cmd_list(cmd_table); + 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 \"/%s\"\n", db_tok_string); + 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 after ','\n"); + db_flush_lex(); + return; + } + } + else { + db_unread_token(t); + count = -1; + } + } + } + *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; + } + } +} + +void +db_command_list(last_cmdp, cmd_table) + struct db_command **last_cmdp; /* IN_OUT */ + struct db_command *cmd_table; +{ + void db_skip_to_eol(); + + do { + db_command(last_cmdp, cmd_table); + db_skip_to_eol(); + } while (db_read_token() == tSEMI_COLON && db_cmd_loop_done == 0); +} + +/* + * 'show' commands + */ +extern void db_listbreak_cmd(); +extern void db_listwatch_cmd(); +extern void db_show_regs(), db_show_one_thread(), db_show_one_task(); +extern void db_show_all_threads(); +extern void db_show_macro(); +extern void vm_map_print(), vm_object_print(), vm_page_print(); +extern void vm_map_copy_print(); +extern void ipc_port_print(), ipc_pset_print(), db_show_all_slocks(); +extern void ipc_kmsg_print(), ipc_msg_print(); +extern void db_show_port_id(); +void db_show_help(); +#if NORMA_IPC +extern void netipc_packet_print(), netipc_pcs_print(), db_show_all_uids(); +extern void db_show_all_proxies(), db_show_all_principals(); +extern void db_show_all_uids_verbose(); +#endif NORMA_IPC +#if NORMA_VM +extern void xmm_obj_print(), xmm_reply_print(); +#endif NORMA_VM + +struct db_command db_show_all_cmds[] = { + { "threads", db_show_all_threads, 0, 0 }, + { "slocks", db_show_all_slocks, 0, 0 }, +#if NORMA_IPC + { "uids", db_show_all_uids, 0, 0 }, + { "proxies", db_show_all_proxies, 0, 0 }, + { "principals", db_show_all_principals, 0, 0 }, + { "vuids", db_show_all_uids_verbose, 0, 0 }, +#endif NORMA_IPC + { (char *)0 } +}; + +struct db_command db_show_cmds[] = { + { "all", 0, 0, db_show_all_cmds }, + { "registers", db_show_regs, 0, 0 }, + { "breaks", db_listbreak_cmd, 0, 0 }, + { "watches", db_listwatch_cmd, 0, 0 }, + { "thread", db_show_one_thread, 0, 0 }, + { "task", db_show_one_task, 0, 0 }, + { "macro", db_show_macro, CS_OWN, 0 }, + { "map", vm_map_print, 0, 0 }, + { "object", vm_object_print, 0, 0 }, + { "page", vm_page_print, 0, 0 }, + { "copy", vm_map_copy_print, 0, 0 }, + { "port", ipc_port_print, 0, 0 }, + { "pset", ipc_pset_print, 0, 0 }, + { "kmsg", ipc_kmsg_print, 0, 0 }, + { "msg", ipc_msg_print, 0, 0 }, + { "ipc_port", db_show_port_id, 0, 0 }, +#if NORMA_IPC + { "packet", netipc_packet_print, 0, 0 }, + { "pcs", netipc_pcs_print, 0, 0 }, +#endif NORMA_IPC +#if NORMA_VM + { "xmm_obj", xmm_obj_print, 0, 0 }, + { "xmm_reply", xmm_reply_print, 0, 0 }, +#endif NORMA_VM + { (char *)0, } +}; + +extern void db_print_cmd(), db_examine_cmd(), db_set_cmd(); +extern void db_examine_forward(), db_examine_backward(); +extern void db_search_cmd(); +extern void db_write_cmd(); +extern void db_delete_cmd(), db_breakpoint_cmd(); +extern void db_deletewatch_cmd(), db_watchpoint_cmd(); +extern void db_single_step_cmd(), db_trace_until_call_cmd(), + db_trace_until_matching_cmd(), db_continue_cmd(); +extern void db_stack_trace_cmd(), db_cond_cmd(); +void db_help_cmd(); +void db_def_macro_cmd(), db_del_macro_cmd(); +void db_fncall(); +extern void db_reset_cpu(); + +struct db_command db_command_table[] = { +#ifdef DB_MACHINE_COMMANDS + /* this must be the first entry, if it exists */ + { "machine", 0, 0, 0}, +#endif + { "print", db_print_cmd, CS_OWN, 0 }, + { "examine", db_examine_cmd, CS_MORE|CS_SET_DOT, 0 }, + { "x", db_examine_cmd, CS_MORE|CS_SET_DOT, 0 }, + { "xf", db_examine_forward, CS_SET_DOT, 0 }, + { "xb", db_examine_backward, CS_SET_DOT, 0 }, + { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 }, + { "set", db_set_cmd, CS_OWN, 0 }, + { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, + { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, + { "delete", db_delete_cmd, CS_OWN, 0 }, + { "d", db_delete_cmd, CS_OWN, 0 }, + { "break", db_breakpoint_cmd, CS_MORE, 0 }, + { "dwatch", db_deletewatch_cmd, CS_MORE, 0 }, + { "watch", db_watchpoint_cmd, CS_MORE, 0 }, + { "step", db_single_step_cmd, 0, 0 }, + { "s", db_single_step_cmd, 0, 0 }, + { "continue", db_continue_cmd, 0, 0 }, + { "c", db_continue_cmd, 0, 0 }, + { "until", db_trace_until_call_cmd,0, 0 }, + { "next", db_trace_until_matching_cmd,0, 0 }, + { "match", db_trace_until_matching_cmd,0, 0 }, + { "trace", db_stack_trace_cmd, 0, 0 }, + { "cond", db_cond_cmd, CS_OWN, 0 }, + { "call", db_fncall, CS_OWN, 0 }, + { "macro", db_def_macro_cmd, CS_OWN, 0 }, + { "dmacro", db_del_macro_cmd, CS_OWN, 0 }, + { "show", 0, 0, db_show_cmds }, + { "reset", db_reset_cpu, 0, 0 }, + { "reboot", db_reset_cpu, 0, 0 }, + { (char *)0, } +}; + +#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() +{ + struct db_command *cmd = db_command_table; + + while (cmd->name != 0) { + db_printf("%-12s", cmd->name); + db_end_line(); + cmd++; + } +} + +int (*ddb_display)(); + +void +db_command_loop() +{ + jmp_buf_t db_jmpbuf; + jmp_buf_t *prev = db_recover; + extern int db_output_line; + extern int db_macro_level; +#if NORMA_IPC + extern int _node_self; /* node_self() may not be callable yet */ +#endif NORMA_IPC + + /* + * Initialize 'prev' and 'next' to dot. + */ + db_prev = db_dot; + db_next = db_dot; + + if (ddb_display) + (*ddb_display)(); + + db_cmd_loop_done = 0; + while (!db_cmd_loop_done) { + (void) _setjmp(db_recover = &db_jmpbuf); + db_macro_level = 0; + if (db_print_position() != 0) + db_printf("\n"); + db_output_line = 0; + db_printf("db%s", (db_default_thread)? "t": ""); +#if NORMA_IPC + db_printf("%d", _node_self); +#endif +#if NCPUS > 1 + db_printf("{%d}", cpu_number()); +#endif + db_printf("> "); + + (void) db_read_line("!!"); + db_command_list(&db_last_command, db_command_table); + } + + db_recover = prev; +} + +boolean_t +db_exec_cmd_nest(cmd, size) + char *cmd; + int size; +{ + struct db_lex_context lex_context; + + db_cmd_loop_done = 0; + if (cmd) { + db_save_lex_context(&lex_context); + db_switch_input(cmd, size /**OLD, &lex_context OLD**/); + } + db_command_list(&db_last_command, db_command_table); + if (cmd) + db_restore_lex_context(&lex_context); + return(db_cmd_loop_done == 0); +} + +#ifdef __GNUC__ +extern __volatile__ void _longjmp(); +#endif + +void db_error(s) + char *s; +{ + extern int db_macro_level; + + db_macro_level = 0; + if (db_recover) { + if (s) + db_printf(s); + db_flush_lex(); + _longjmp(db_recover, 1); + } + else + { + if (s) + db_printf(s); + panic("db_error"); + } +} + +/* + * Call random function: + * !expr(arg,arg,arg) + */ +void +db_fncall() +{ + db_expr_t fn_addr; +#define MAXARGS 11 + db_expr_t args[MAXARGS]; + int nargs = 0; + db_expr_t retval; + db_expr_t (*func)(); + int t; + + if (!db_expression(&fn_addr)) { + db_printf("Bad function \"%s\"\n", db_tok_string); + db_flush_lex(); + return; + } + func = (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; + } + } + 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); +} + +boolean_t +db_option(modif, option) + char *modif; + int option; +{ + register char *p; + + for (p = modif; *p; p++) + if (*p == option) + return(TRUE); + return(FALSE); +} + +#endif MACH_KDB |