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-rw-r--r--ddb/db_command.c594
1 files changed, 594 insertions, 0 deletions
diff --git a/ddb/db_command.c b/ddb/db_command.c
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--- /dev/null
+++ b/ddb/db_command.c
@@ -0,0 +1,594 @@
+/*
+ * 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
+ */
+
+#if MACH_KDB
+
+/*
+ * Command dispatcher.
+ */
+
+#include <string.h>
+#include <mach/boolean.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 <ddb/db_macro.h>
+#include <ddb/db_expr.h>
+#include <ddb/db_examine.h>
+#include <ddb/db_print.h>
+#include <ddb/db_break.h>
+#include <ddb/db_watch.h>
+#include <ddb/db_variables.h>
+#include <ddb/db_write_cmd.h>
+#include <ddb/db_run.h>
+#include <ddb/db_cond.h>
+
+#include <machine/setjmp.h>
+#include <machine/db_interface.h>
+#include <kern/debug.h>
+#include <kern/thread.h>
+#include <kern/slab.h>
+#include <ipc/ipc_pset.h> /* 4proto */
+#include <ipc/ipc_port.h> /* 4proto */
+
+#include <vm/vm_print.h>
+#include <vm/vm_page.h>
+#include <ipc/ipc_print.h>
+#include <ipc/mach_port.h>
+#include <kern/lock.h>
+
+/*
+ * 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.
+ */
+static int
+db_cmd_search(
+ const char * name,
+ const struct db_command *table,
+ const struct db_command **cmdp /* out */)
+{
+ const struct db_command *cmd;
+ int result = CMD_NONE;
+
+ for (cmd = table; cmd->name != 0; cmd++) {
+ const char *lp;
+ char *rp;
+ 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);
+}
+
+static void
+db_cmd_list(const struct db_command *table)
+{
+ const struct db_command *cmd;
+
+ for (cmd = table; cmd->name != 0; cmd++) {
+ db_printf("%-12s", cmd->name);
+ db_end_line();
+ }
+}
+
+static void
+db_command(
+ const struct db_command **last_cmdp, /* IN_OUT */
+ struct db_command *cmd_table)
+{
+ const struct db_command *cmd = NULL;
+ 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) {
+ 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 != NULL) {
+ /*
+ * 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;
+ }
+ }
+}
+
+static void
+db_command_list(
+ const struct db_command **last_cmdp, /* IN_OUT */
+ struct db_command *cmd_table)
+{
+ do {
+ db_command(last_cmdp, cmd_table);
+ db_skip_to_eol();
+ } while (db_read_token() == tSEMI_COLON && db_cmd_loop_done == FALSE);
+}
+
+struct db_command db_show_all_cmds[] = {
+ { "tasks", db_show_all_tasks, 0, 0 },
+ { "threads", db_show_all_threads, 0, 0 },
+ { "slocks", (db_command_fun_t)db_show_all_slocks, 0, 0 },
+ { "runqs", (db_command_fun_t)db_show_all_runqs, 0, 0 },
+ { (char *)0 }
+};
+
+struct db_command db_show_cmds[] = {
+ { "all", 0, 0, db_show_all_cmds },
+ { "registers", (db_command_fun_t)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", (db_command_fun_t)vm_object_print, 0, 0 },
+ { "page", (db_command_fun_t)vm_page_print, 0, 0 },
+ { "copy", (db_command_fun_t)vm_map_copy_print, 0, 0 },
+ { "port", (db_command_fun_t)ipc_port_print, 0, 0 },
+ { "pset", (db_command_fun_t)ipc_pset_print, 0, 0 },
+ { "kmsg", (db_command_fun_t)ipc_kmsg_print, 0, 0 },
+ { "msg", (db_command_fun_t)ipc_msg_print, 0, 0 },
+ { "ipc_port", db_show_port_id, 0, 0 },
+ { "slabinfo", (db_command_fun_t)db_show_slab_info, 0, 0 },
+ { "vmstat", (db_command_fun_t)db_show_vmstat, 0, 0 },
+ { (char *)0, }
+};
+
+void
+db_debug_all_traps_cmd(db_expr_t addr,
+ int have_addr,
+ db_expr_t count,
+ const char *modif);
+void
+db_debug_port_references_cmd(db_expr_t addr,
+ int have_addr,
+ db_expr_t count,
+ const char *modif);
+
+struct db_command db_debug_cmds[] = {
+ { "traps", db_debug_all_traps_cmd, 0, 0 },
+ { "references", db_debug_port_references_cmd, 0, 0 },
+ { (char *)0, }
+};
+
+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_command_fun_t)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 },
+ { "whatis", db_whatis_cmd, CS_MORE, 0 },
+ { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
+ { "set", (db_command_fun_t)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_command_fun_t)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 },
+ { "debug", 0, 0, db_debug_cmds },
+ { "reset", (db_command_fun_t)db_reset_cpu, 0, 0 },
+ { "reboot", (db_command_fun_t)db_reset_cpu, 0, 0 },
+ { "halt", (db_command_fun_t)db_halt_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(struct db_command *ptr)
+{
+ db_command_table[0].more = ptr;
+ return;
+}
+
+#endif /* DB_MACHINE_COMMANDS */
+
+
+const struct db_command *db_last_command = 0;
+
+void
+db_help_cmd(void)
+{
+ struct db_command *cmd = db_command_table;
+
+ while (cmd->name != 0) {
+ db_printf("%-12s", cmd->name);
+ db_end_line();
+ cmd++;
+ }
+}
+
+void
+db_command_loop(void)
+{
+ jmp_buf_t db_jmpbuf;
+ jmp_buf_t *prev = db_recover;
+ extern int db_output_line;
+ extern int db_macro_level;
+
+ /*
+ * Initialize 'prev' and 'next' to dot.
+ */
+ db_prev = db_dot;
+ db_next = db_dot;
+
+ db_cmd_loop_done = FALSE;
+ 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 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(
+ char *cmd,
+ int size)
+{
+ struct db_lex_context lex_context;
+
+ db_cmd_loop_done = FALSE;
+ 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 == FALSE);
+}
+
+void db_error(const 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(void)
+{
+ db_expr_t fn_addr;
+#define MAXARGS 11
+ db_expr_t args[MAXARGS];
+ int nargs = 0;
+ db_expr_t retval;
+ typedef db_expr_t(*function_t)(db_expr_t, db_expr_t, db_expr_t,
+ db_expr_t, db_expr_t, db_expr_t,
+ db_expr_t, db_expr_t, db_expr_t,
+ db_expr_t);
+ function_t func;
+ int t;
+
+ if (!db_expression(&fn_addr)) {
+ db_printf("Bad function \"%s\"\n", db_tok_string);
+ db_flush_lex();
+ return;
+ }
+ func = (function_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 __attribute__ ((pure))
+db_option(
+ const char *modif,
+ int option)
+{
+ const char *p;
+
+ for (p = modif; *p; p++)
+ if (*p == option)
+ return(TRUE);
+ return(FALSE);
+}
+
+void
+db_debug_all_traps_cmd(db_expr_t addr,
+ int have_addr,
+ db_expr_t count,
+ const char *modif)
+{
+ if (strcmp (modif, "on") == 0)
+ db_debug_all_traps (TRUE);
+ else if (strcmp (modif, "off") == 0)
+ db_debug_all_traps (FALSE);
+ else
+ db_error ("debug traps /on|/off\n");
+}
+
+void
+db_debug_port_references_cmd(db_expr_t addr,
+ int have_addr,
+ db_expr_t count,
+ const char *modif)
+{
+ if (strcmp (modif, "on") == 0)
+ db_debug_port_references (TRUE);
+ else if (strcmp (modif, "off") == 0)
+ db_debug_port_references (FALSE);
+ else
+ db_error ("debug references /on|/off\n");
+}
+
+#endif /* MACH_KDB */
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