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1.1.1.2 root 1: /*
1.1 root 2: * Mach Operating System
3: * Copyright (c) 1991 Carnegie Mellon University
4: * All Rights Reserved.
1.1.1.2 root 5: *
1.1 root 6: * Permission to use, copy, modify and distribute this software and its
7: * documentation is hereby granted, provided that both the copyright
8: * notice and this permission notice appear in all copies of the
9: * software, derivative works or modified versions, and any portions
10: * thereof, and that both notices appear in supporting documentation.
1.1.1.2 root 11: *
1.1 root 12: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
1.1.1.2 root 15: *
1.1 root 16: * Carnegie Mellon requests users of this software to return to
1.1.1.2 root 17: *
1.1 root 18: * Software Distribution Coordinator or [email protected]
19: * School of Computer Science
20: * Carnegie Mellon University
21: * Pittsburgh PA 15213-3890
1.1.1.2 root 22: *
1.1 root 23: * any improvements or extensions that they make and grant Carnegie Mellon
24: * the rights to redistribute these changes.
25: */
26: /*
27: * Author: David B. Golub, Carnegie Mellon University
28: * Date: 7/90
29: */
30:
31: #if MACH_KDB
32:
33: /*
34: * Command dispatcher.
35: */
36:
1.1.1.3 ! root 37: #include <string.h>
1.1 root 38: #include <mach/boolean.h>
39: #include <machine/db_machdep.h>
40:
41: #include <ddb/db_lex.h>
42: #include <ddb/db_output.h>
43: #include <ddb/db_command.h>
44: #include <ddb/db_task_thread.h>
1.1.1.3 ! root 45: #include <ddb/db_macro.h>
! 46: #include <ddb/db_expr.h>
! 47: #include <ddb/db_examine.h>
! 48: #include <ddb/db_print.h>
! 49: #include <ddb/db_break.h>
! 50: #include <ddb/db_watch.h>
! 51: #include <ddb/db_variables.h>
! 52: #include <ddb/db_write_cmd.h>
! 53: #include <ddb/db_run.h>
! 54: #include <ddb/db_cond.h>
1.1 root 55:
56: #include <machine/setjmp.h>
1.1.1.3 ! root 57: #include <kern/debug.h>
1.1 root 58: #include <kern/thread.h>
59: #include <ipc/ipc_pset.h> /* 4proto */
60: #include <ipc/ipc_port.h> /* 4proto */
61:
1.1.1.3 ! root 62: #include <vm/vm_print.h>
! 63: #include <ipc/ipc_print.h>
! 64: #include <kern/lock.h>
1.1 root 65:
66: /*
67: * Exported global variables
68: */
69: boolean_t db_cmd_loop_done;
70: jmp_buf_t *db_recover = 0;
71: db_addr_t db_dot;
72: db_addr_t db_last_addr;
73: db_addr_t db_prev;
74: db_addr_t db_next;
75:
76: /*
77: * if 'ed' style: 'dot' is set at start of last item printed,
78: * and '+' points to next line.
79: * Otherwise: 'dot' points to next item, '..' points to last.
80: */
81: boolean_t db_ed_style = TRUE;
82:
83: /*
84: * Results of command search.
85: */
86: #define CMD_UNIQUE 0
87: #define CMD_FOUND 1
88: #define CMD_NONE 2
89: #define CMD_AMBIGUOUS 3
90: #define CMD_HELP 4
91:
92: /*
93: * Search for command prefix.
94: */
95: int
96: db_cmd_search(name, table, cmdp)
97: char * name;
98: struct db_command *table;
99: struct db_command **cmdp; /* out */
100: {
101: struct db_command *cmd;
102: int result = CMD_NONE;
103:
104: for (cmd = table; cmd->name != 0; cmd++) {
105: register char *lp;
106: register char *rp;
107: register int c;
108:
109: lp = name;
110: rp = cmd->name;
111: while ((c = *lp) == *rp) {
112: if (c == 0) {
113: /* complete match */
114: *cmdp = cmd;
115: return (CMD_UNIQUE);
116: }
117: lp++;
118: rp++;
119: }
120: if (c == 0) {
121: /* end of name, not end of command -
122: partial match */
123: if (result == CMD_FOUND) {
124: result = CMD_AMBIGUOUS;
125: /* but keep looking for a full match -
126: this lets us match single letters */
127: }
128: else {
129: *cmdp = cmd;
130: result = CMD_FOUND;
131: }
132: }
133: }
134: if (result == CMD_NONE) {
135: /* check for 'help' */
136: if (!strncmp(name, "help", strlen(name)))
137: result = CMD_HELP;
138: }
139: return (result);
140: }
141:
142: void
143: db_cmd_list(table)
144: struct db_command *table;
145: {
146: register struct db_command *cmd;
147:
148: for (cmd = table; cmd->name != 0; cmd++) {
149: db_printf("%-12s", cmd->name);
150: db_end_line();
151: }
152: }
153:
154: void
155: db_command(last_cmdp, cmd_table)
156: struct db_command **last_cmdp; /* IN_OUT */
157: struct db_command *cmd_table;
158: {
159: struct db_command *cmd;
160: int t;
161: char modif[TOK_STRING_SIZE];
162: db_expr_t addr, count;
163: boolean_t have_addr = FALSE;
164: int result;
165:
166: t = db_read_token();
167: if (t == tEOL || t == tSEMI_COLON) {
168: /* empty line repeats last command, at 'next' */
169: cmd = *last_cmdp;
170: addr = (db_expr_t)db_next;
171: have_addr = FALSE;
172: count = 1;
173: modif[0] = '\0';
174: if (t == tSEMI_COLON)
175: db_unread_token(t);
176: }
177: else if (t == tEXCL) {
178: void db_fncall();
179: db_fncall();
180: return;
181: }
182: else if (t != tIDENT) {
183: db_printf("?\n");
184: db_flush_lex();
185: return;
186: }
187: else {
188: /*
189: * Search for command
190: */
191: while (cmd_table) {
192: result = db_cmd_search(db_tok_string,
193: cmd_table,
194: &cmd);
195: switch (result) {
196: case CMD_NONE:
197: if (db_exec_macro(db_tok_string) == 0)
198: return;
199: db_printf("No such command \"%s\"\n", db_tok_string);
200: db_flush_lex();
201: return;
202: case CMD_AMBIGUOUS:
203: db_printf("Ambiguous\n");
204: db_flush_lex();
205: return;
206: case CMD_HELP:
207: db_cmd_list(cmd_table);
208: db_flush_lex();
209: return;
210: default:
211: break;
212: }
213: if ((cmd_table = cmd->more) != 0) {
214: t = db_read_token();
215: if (t != tIDENT) {
216: db_cmd_list(cmd_table);
217: db_flush_lex();
218: return;
219: }
220: }
221: }
222:
223: if ((cmd->flag & CS_OWN) == 0) {
224: /*
225: * Standard syntax:
226: * command [/modifier] [addr] [,count]
227: */
228: t = db_read_token();
229: if (t == tSLASH) {
230: t = db_read_token();
231: if (t != tIDENT) {
232: db_printf("Bad modifier \"/%s\"\n", db_tok_string);
233: db_flush_lex();
234: return;
235: }
236: db_strcpy(modif, db_tok_string);
237: }
238: else {
239: db_unread_token(t);
240: modif[0] = '\0';
241: }
242:
243: if (db_expression(&addr)) {
244: db_dot = (db_addr_t) addr;
245: db_last_addr = db_dot;
246: have_addr = TRUE;
247: }
248: else {
249: addr = (db_expr_t) db_dot;
250: have_addr = FALSE;
251: }
252: t = db_read_token();
253: if (t == tCOMMA) {
254: if (!db_expression(&count)) {
255: db_printf("Count missing after ','\n");
256: db_flush_lex();
257: return;
258: }
259: }
260: else {
261: db_unread_token(t);
262: count = -1;
263: }
264: }
265: }
266: *last_cmdp = cmd;
267: if (cmd != 0) {
268: /*
269: * Execute the command.
270: */
271: (*cmd->fcn)(addr, have_addr, count, modif);
272:
273: if (cmd->flag & CS_SET_DOT) {
274: /*
275: * If command changes dot, set dot to
276: * previous address displayed (if 'ed' style).
277: */
278: if (db_ed_style) {
279: db_dot = db_prev;
280: }
281: else {
282: db_dot = db_next;
283: }
284: }
285: else {
286: /*
287: * If command does not change dot,
288: * set 'next' location to be the same.
289: */
290: db_next = db_dot;
291: }
292: }
293: }
294:
295: void
296: db_command_list(last_cmdp, cmd_table)
297: struct db_command **last_cmdp; /* IN_OUT */
298: struct db_command *cmd_table;
299: {
300: void db_skip_to_eol();
301:
302: do {
303: db_command(last_cmdp, cmd_table);
304: db_skip_to_eol();
305: } while (db_read_token() == tSEMI_COLON && db_cmd_loop_done == 0);
306: }
307:
308: struct db_command db_show_all_cmds[] = {
309: { "threads", db_show_all_threads, 0, 0 },
310: { "slocks", db_show_all_slocks, 0, 0 },
311: { (char *)0 }
312: };
313:
314: struct db_command db_show_cmds[] = {
315: { "all", 0, 0, db_show_all_cmds },
316: { "registers", db_show_regs, 0, 0 },
317: { "breaks", db_listbreak_cmd, 0, 0 },
318: { "watches", db_listwatch_cmd, 0, 0 },
319: { "thread", db_show_one_thread, 0, 0 },
320: { "task", db_show_one_task, 0, 0 },
321: { "macro", db_show_macro, CS_OWN, 0 },
322: { "map", vm_map_print, 0, 0 },
323: { "object", vm_object_print, 0, 0 },
324: { "page", vm_page_print, 0, 0 },
325: { "copy", vm_map_copy_print, 0, 0 },
326: { "port", ipc_port_print, 0, 0 },
327: { "pset", ipc_pset_print, 0, 0 },
328: { "kmsg", ipc_kmsg_print, 0, 0 },
329: { "msg", ipc_msg_print, 0, 0 },
330: { "ipc_port", db_show_port_id, 0, 0 },
331: { (char *)0, }
332: };
333:
334: void db_help_cmd();
1.1.1.3 ! root 335: extern void db_stack_trace_cmd();
1.1 root 336: extern void db_reset_cpu();
337:
338: struct db_command db_command_table[] = {
339: #ifdef DB_MACHINE_COMMANDS
340: /* this must be the first entry, if it exists */
341: { "machine", 0, 0, 0},
342: #endif
343: { "print", db_print_cmd, CS_OWN, 0 },
344: { "examine", db_examine_cmd, CS_MORE|CS_SET_DOT, 0 },
345: { "x", db_examine_cmd, CS_MORE|CS_SET_DOT, 0 },
346: { "xf", db_examine_forward, CS_SET_DOT, 0 },
347: { "xb", db_examine_backward, CS_SET_DOT, 0 },
348: { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
349: { "set", db_set_cmd, CS_OWN, 0 },
350: { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
351: { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
352: { "delete", db_delete_cmd, CS_OWN, 0 },
353: { "d", db_delete_cmd, CS_OWN, 0 },
354: { "break", db_breakpoint_cmd, CS_MORE, 0 },
355: { "dwatch", db_deletewatch_cmd, CS_MORE, 0 },
356: { "watch", db_watchpoint_cmd, CS_MORE, 0 },
357: { "step", db_single_step_cmd, 0, 0 },
358: { "s", db_single_step_cmd, 0, 0 },
359: { "continue", db_continue_cmd, 0, 0 },
360: { "c", db_continue_cmd, 0, 0 },
361: { "until", db_trace_until_call_cmd,0, 0 },
362: { "next", db_trace_until_matching_cmd,0, 0 },
363: { "match", db_trace_until_matching_cmd,0, 0 },
364: { "trace", db_stack_trace_cmd, 0, 0 },
365: { "cond", db_cond_cmd, CS_OWN, 0 },
366: { "call", db_fncall, CS_OWN, 0 },
367: { "macro", db_def_macro_cmd, CS_OWN, 0 },
368: { "dmacro", db_del_macro_cmd, CS_OWN, 0 },
369: { "show", 0, 0, db_show_cmds },
370: { "reset", db_reset_cpu, 0, 0 },
371: { "reboot", db_reset_cpu, 0, 0 },
372: { (char *)0, }
373: };
374:
375: #ifdef DB_MACHINE_COMMANDS
376:
377: /* this function should be called to install the machine dependent
378: commands. It should be called before the debugger is enabled */
379: void db_machine_commands_install(ptr)
380: struct db_command *ptr;
381: {
382: db_command_table[0].more = ptr;
383: return;
384: }
385:
386: #endif
387:
388:
389: struct db_command *db_last_command = 0;
390:
391: void
392: db_help_cmd()
393: {
394: struct db_command *cmd = db_command_table;
395:
396: while (cmd->name != 0) {
397: db_printf("%-12s", cmd->name);
398: db_end_line();
399: cmd++;
400: }
401: }
402:
403: int (*ddb_display)();
404:
405: void
1.1.1.3 ! root 406: db_command_loop(void)
1.1 root 407: {
408: jmp_buf_t db_jmpbuf;
409: jmp_buf_t *prev = db_recover;
410: extern int db_output_line;
411: extern int db_macro_level;
412:
413: /*
414: * Initialize 'prev' and 'next' to dot.
415: */
416: db_prev = db_dot;
417: db_next = db_dot;
418:
419: if (ddb_display)
420: (*ddb_display)();
421:
422: db_cmd_loop_done = 0;
423: while (!db_cmd_loop_done) {
424: (void) _setjmp(db_recover = &db_jmpbuf);
425: db_macro_level = 0;
426: if (db_print_position() != 0)
427: db_printf("\n");
428: db_output_line = 0;
429: db_printf("db%s", (db_default_thread)? "t": "");
430: #if NCPUS > 1
431: db_printf("{%d}", cpu_number());
432: #endif
433: db_printf("> ");
434:
435: (void) db_read_line("!!");
436: db_command_list(&db_last_command, db_command_table);
437: }
438:
439: db_recover = prev;
440: }
441:
442: boolean_t
443: db_exec_cmd_nest(cmd, size)
444: char *cmd;
445: int size;
446: {
447: struct db_lex_context lex_context;
448:
449: db_cmd_loop_done = 0;
450: if (cmd) {
451: db_save_lex_context(&lex_context);
452: db_switch_input(cmd, size /**OLD, &lex_context OLD**/);
453: }
454: db_command_list(&db_last_command, db_command_table);
455: if (cmd)
456: db_restore_lex_context(&lex_context);
457: return(db_cmd_loop_done == 0);
458: }
459:
460: void db_error(s)
461: char *s;
462: {
463: extern int db_macro_level;
464:
465: db_macro_level = 0;
466: if (db_recover) {
467: if (s)
468: db_printf(s);
469: db_flush_lex();
470: _longjmp(db_recover, 1);
471: }
472: else
473: {
474: if (s)
475: db_printf(s);
476: panic("db_error");
477: }
478: }
479:
480: /*
481: * Call random function:
482: * !expr(arg,arg,arg)
483: */
484: void
485: db_fncall()
486: {
487: db_expr_t fn_addr;
488: #define MAXARGS 11
489: db_expr_t args[MAXARGS];
490: int nargs = 0;
491: db_expr_t retval;
492: db_expr_t (*func)();
493: int t;
494:
495: if (!db_expression(&fn_addr)) {
496: db_printf("Bad function \"%s\"\n", db_tok_string);
497: db_flush_lex();
498: return;
499: }
500: func = (db_expr_t (*) ()) fn_addr;
501:
502: t = db_read_token();
503: if (t == tLPAREN) {
504: if (db_expression(&args[0])) {
505: nargs++;
506: while ((t = db_read_token()) == tCOMMA) {
507: if (nargs == MAXARGS) {
508: db_printf("Too many arguments\n");
509: db_flush_lex();
510: return;
511: }
512: if (!db_expression(&args[nargs])) {
513: db_printf("Argument missing\n");
514: db_flush_lex();
515: return;
516: }
517: nargs++;
518: }
519: db_unread_token(t);
520: }
521: if (db_read_token() != tRPAREN) {
522: db_printf("?\n");
523: db_flush_lex();
524: return;
525: }
526: }
527: while (nargs < MAXARGS) {
528: args[nargs++] = 0;
529: }
530:
531: retval = (*func)(args[0], args[1], args[2], args[3], args[4],
532: args[5], args[6], args[7], args[8], args[9] );
533: db_printf(" %#N\n", retval);
534: }
535:
536: boolean_t
537: db_option(modif, option)
538: char *modif;
539: int option;
540: {
541: register char *p;
542:
543: for (p = modif; *p; p++)
544: if (*p == option)
545: return(TRUE);
546: return(FALSE);
547: }
548:
1.1.1.2 root 549: #endif /* MACH_KDB */
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