summaryrefslogtreecommitdiff
path: root/ddb/db_command.c
blob: c44e18ccbf8228f000437a7a4d052e089946b500 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
/*
 * 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 <ipc/ipc_pset.h> /* 4proto */
#include <ipc/ipc_port.h> /* 4proto */

#include <vm/vm_print.h>
#include <ipc/ipc_print.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.
 */
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++) {
	    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);
}

void
db_cmd_list(table)
	struct db_command *table;
{
	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);
}

struct db_command db_show_all_cmds[] = {
	{ "threads",	db_show_all_threads,	0,	0 },
	{ "slocks",	db_show_all_slocks,	0,	0 },
	{ (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 },
	{ (char *)0, }
};

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 /* DB_MACHINE_COMMANDS */


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(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;

	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	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);
}

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;
{
	char *p;

	for (p = modif; *p; p++)
	    if (*p == option)
		return(TRUE);
	return(FALSE);
}

#endif /* MACH_KDB */