![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to db_command.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Net/2] / Net2 / ddb|
Return to db_command.c CVS log | Up to [Net/2] / Net2 / ddb |
1.1 root 1: /*
2: * Mach Operating System
3: * Copyright (c) 1991,1990 Carnegie Mellon University
4: * All Rights Reserved.
5: *
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.
11: *
12: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15: *
16: * Carnegie Mellon requests users of this software to return to
17: *
18: * Software Distribution Coordinator or [email protected]
19: * School of Computer Science
20: * Carnegie Mellon University
21: * Pittsburgh PA 15213-3890
22: *
23: * any improvements or extensions that they make and grant Carnegie the
24: * rights to redistribute these changes.
25: */
26: /*
27: * HISTORY
28: * $Log: db_command.c,v $
29: * Revision 1.1 1992/03/25 21:45:02 pace
30: * Initial revision
31: *
32: * Revision 2.6 91/02/05 17:06:10 mrt
33: * Changed to new Mach copyright
34: * [91/01/31 16:17:18 mrt]
35: *
36: * Revision 2.5 91/01/08 17:31:54 rpd
37: * Forward reference for db_fncall();
38: * [91/01/04 12:35:17 rvb]
39: *
40: * Add call as a synonym for ! and match for next
41: * [91/01/04 12:14:48 rvb]
42: *
43: * Revision 2.4 90/11/07 16:49:15 rpd
44: * Added search.
45: * [90/11/06 rpd]
46: *
47: * Revision 2.3 90/10/25 14:43:45 rwd
48: * Changed db_fncall to print the result unsigned.
49: * [90/10/19 rpd]
50: *
51: * Added CS_MORE to db_watchpoint_cmd.
52: * [90/10/17 rpd]
53: * Added watchpoint commands: watch, dwatch, show watches.
54: * [90/10/16 rpd]
55: *
56: * Revision 2.2 90/08/27 21:50:10 dbg
57: * Remove 'listbreaks' - use 'show breaks' instead. Change 'show
58: * threads' to 'show all threads' to avoid clash with 'show thread'.
59: * Set 'dot' here from db_prev or db_next, depending on 'db_ed_style'
60: * flag and syntax table.
61: * [90/08/22 dbg]
62: * Reduce lint.
63: * [90/08/07 dbg]
64: * Created.
65: * [90/07/25 dbg]
66: *
67: */
68: /*
69: * Author: David B. Golub, Carnegie Mellon University
70: * Date: 7/90
71: */
72: /*
73: * Command dispatcher.
74: */
75: #include "param.h"
76: #include "proc.h"
77: #include <machine/db_machdep.h> /* type definitions */
78:
79: #include <ddb/db_lex.h>
80: #include <ddb/db_output.h>
81:
82: #include <setjmp.h>
83:
84: /*
85: * Exported global variables
86: */
87: boolean_t db_cmd_loop_done;
88: jmp_buf db_jmpbuf;
89: db_addr_t db_dot;
90: db_addr_t db_last_addr;
91: db_addr_t db_prev;
92: db_addr_t db_next;
93:
94: /*
95: * if 'ed' style: 'dot' is set at start of last item printed,
96: * and '+' points to next line.
97: * Otherwise: 'dot' points to next item, '..' points to last.
98: */
99: boolean_t db_ed_style = TRUE;
100:
101:
102: /*
103: * Utility routine - discard tokens through end-of-line.
104: */
105: void
106: db_skip_to_eol()
107: {
108: int t;
109: do {
110: t = db_read_token();
111: } while (t != tEOL);
112: }
113:
114: /*
115: * Command table
116: */
117: struct command {
118: char * name; /* command name */
119: void (*fcn)(); /* function to call */
120: int flag; /* extra info: */
121: #define CS_OWN 0x1 /* non-standard syntax */
122: #define CS_MORE 0x2 /* standard syntax, but may have other
123: words at end */
124: #define CS_SET_DOT 0x100 /* set dot after command */
125: struct command *more; /* another level of command */
126: };
127:
128: /*
129: * Results of command search.
130: */
131: #define CMD_UNIQUE 0
132: #define CMD_FOUND 1
133: #define CMD_NONE 2
134: #define CMD_AMBIGUOUS 3
135: #define CMD_HELP 4
136:
137: /*
138: * Search for command prefix.
139: */
140: int
141: db_cmd_search(name, table, cmdp)
142: char * name;
143: struct command *table;
144: struct command **cmdp; /* out */
145: {
146: struct command *cmd;
147: int result = CMD_NONE;
148:
149: for (cmd = table; cmd->name != 0; cmd++) {
150: register char *lp;
151: register char *rp;
152: register int c;
153:
154: lp = name;
155: rp = cmd->name;
156: while ((c = *lp) == *rp) {
157: if (c == 0) {
158: /* complete match */
159: *cmdp = cmd;
160: return (CMD_UNIQUE);
161: }
162: lp++;
163: rp++;
164: }
165: if (c == 0) {
166: /* end of name, not end of command -
167: partial match */
168: if (result == CMD_FOUND) {
169: result = CMD_AMBIGUOUS;
170: /* but keep looking for a full match -
171: this lets us match single letters */
172: }
173: else {
174: *cmdp = cmd;
175: result = CMD_FOUND;
176: }
177: }
178: }
179: if (result == CMD_NONE) {
180: /* check for 'help' */
181: if (name[0] == 'h' && name[1] == 'e'
182: && name[2] == 'l' && name[3] == 'p')
183: result = CMD_HELP;
184: }
185: return (result);
186: }
187:
188: void
189: db_cmd_list(table)
190: struct command *table;
191: {
192: register struct command *cmd;
193:
194: for (cmd = table; cmd->name != 0; cmd++) {
195: db_printf("%-12s", cmd->name);
196: db_end_line();
197: }
198: }
199:
200: void
201: db_command(last_cmdp, cmd_table)
202: struct command **last_cmdp; /* IN_OUT */
203: struct command *cmd_table;
204: {
205: struct command *cmd;
206: int t;
207: char modif[TOK_STRING_SIZE];
208: db_expr_t addr, count;
209: boolean_t have_addr;
210: int result;
211:
212: t = db_read_token();
213: if (t == tEOL) {
214: /* empty line repeats last command, at 'next' */
215: cmd = *last_cmdp;
216: addr = (db_expr_t)db_next;
217: have_addr = FALSE;
218: count = 1;
219: modif[0] = '\0';
220: }
221: else if (t == tEXCL) {
222: void db_fncall();
223: db_fncall();
224: return;
225: }
226: else if (t != tIDENT) {
227: db_printf("?\n");
228: db_flush_lex();
229: return;
230: }
231: else {
232: /*
233: * Search for command
234: */
235: while (cmd_table) {
236: result = db_cmd_search(db_tok_string,
237: cmd_table,
238: &cmd);
239: switch (result) {
240: case CMD_NONE:
241: db_printf("No such command\n");
242: db_flush_lex();
243: return;
244: case CMD_AMBIGUOUS:
245: db_printf("Ambiguous\n");
246: db_flush_lex();
247: return;
248: case CMD_HELP:
249: db_cmd_list(cmd_table);
250: db_flush_lex();
251: return;
252: default:
253: break;
254: }
255: if ((cmd_table = cmd->more) != 0) {
256: t = db_read_token();
257: if (t != tIDENT) {
258: db_cmd_list(cmd_table);
259: db_flush_lex();
260: return;
261: }
262: }
263: }
264:
265: if ((cmd->flag & CS_OWN) == 0) {
266: /*
267: * Standard syntax:
268: * command [/modifier] [addr] [,count]
269: */
270: t = db_read_token();
271: if (t == tSLASH) {
272: t = db_read_token();
273: if (t != tIDENT) {
274: db_printf("Bad modifier\n");
275: db_flush_lex();
276: return;
277: }
278: db_strcpy(modif, db_tok_string);
279: }
280: else {
281: db_unread_token(t);
282: modif[0] = '\0';
283: }
284:
285: if (db_expression(&addr)) {
286: db_dot = (db_addr_t) addr;
287: db_last_addr = db_dot;
288: have_addr = TRUE;
289: }
290: else {
291: addr = (db_expr_t) db_dot;
292: have_addr = FALSE;
293: }
294: t = db_read_token();
295: if (t == tCOMMA) {
296: if (!db_expression(&count)) {
297: db_printf("Count missing\n");
298: db_flush_lex();
299: return;
300: }
301: }
302: else {
303: db_unread_token(t);
304: count = -1;
305: }
306: if ((cmd->flag & CS_MORE) == 0) {
307: db_skip_to_eol();
308: }
309: }
310: }
311: *last_cmdp = cmd;
312: if (cmd != 0) {
313: /*
314: * Execute the command.
315: */
316: (*cmd->fcn)(addr, have_addr, count, modif);
317:
318: if (cmd->flag & CS_SET_DOT) {
319: /*
320: * If command changes dot, set dot to
321: * previous address displayed (if 'ed' style).
322: */
323: if (db_ed_style) {
324: db_dot = db_prev;
325: }
326: else {
327: db_dot = db_next;
328: }
329: }
330: else {
331: /*
332: * If command does not change dot,
333: * set 'next' location to be the same.
334: */
335: db_next = db_dot;
336: }
337: }
338: }
339:
340: /*
341: * 'show' commands
342: */
343: extern void db_listbreak_cmd();
344: extern void db_listwatch_cmd();
345: extern void db_show_regs(), db_show_one_thread(), db_show_all_threads();
346: extern void vm_map_print(), vm_object_print(), vm_page_print();
347: extern void ipc_port_print();
348: void db_show_help();
349:
350: struct command db_show_all_cmds[] = {
351: #if 0
352: { "threads", db_show_all_threads,0, 0 },
353: #endif
354: { (char *)0 }
355: };
356:
357: struct command db_show_cmds[] = {
358: { "all", 0, 0, db_show_all_cmds },
359: { "registers", db_show_regs, 0, 0 },
360: { "breaks", db_listbreak_cmd, 0, 0 },
361: { "watches", db_listwatch_cmd, 0, 0 },
362: #if 0
363: { "thread", db_show_one_thread, 0, 0 },
364: #endif
365: { "map", vm_map_print, 0, 0 },
366: { "object", vm_object_print, 0, 0 },
367: #if 0
368: { "page", vm_page_print, 0, 0 },
369: #endif
370: #if 0
371: { "port", ipc_port_print, 0, 0 },
372: #endif
373: { (char *)0, }
374: };
375:
376: extern void db_print_cmd(), db_examine_cmd(), db_set_cmd();
377: extern void db_search_cmd();
378: extern void db_write_cmd();
379: extern void db_delete_cmd(), db_breakpoint_cmd();
380: extern void db_deletewatch_cmd(), db_watchpoint_cmd();
381: extern void db_single_step_cmd(), db_trace_until_call_cmd(),
382: db_trace_until_matching_cmd(), db_continue_cmd();
383: extern void db_stack_trace_cmd();
384: void db_help_cmd();
385: void db_fncall();
386:
387: struct command db_command_table[] = {
388: { "print", db_print_cmd, 0, 0 },
389: { "examine", db_examine_cmd, CS_SET_DOT, 0 },
390: { "x", db_examine_cmd, CS_SET_DOT, 0 },
391: { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
392: { "set", db_set_cmd, CS_OWN, 0 },
393: { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
394: { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
395: { "delete", db_delete_cmd, 0, 0 },
396: { "d", db_delete_cmd, 0, 0 },
397: { "break", db_breakpoint_cmd, 0, 0 },
398: { "dwatch", db_deletewatch_cmd, 0, 0 },
399: { "watch", db_watchpoint_cmd, CS_MORE,0 },
400: { "step", db_single_step_cmd, 0, 0 },
401: { "s", db_single_step_cmd, 0, 0 },
402: { "continue", db_continue_cmd, 0, 0 },
403: { "c", db_continue_cmd, 0, 0 },
404: { "until", db_trace_until_call_cmd,0, 0 },
405: { "next", db_trace_until_matching_cmd,0, 0 },
406: { "match", db_trace_until_matching_cmd,0, 0 },
407: { "trace", db_stack_trace_cmd, 0, 0 },
408: { "call", db_fncall, CS_OWN, 0 },
409: { "show", 0, 0, db_show_cmds },
410: { (char *)0, }
411: };
412:
413: struct command *db_last_command = 0;
414:
415: void
416: db_help_cmd()
417: {
418: struct command *cmd = db_command_table;
419:
420: while (cmd->name != 0) {
421: db_printf("%-12s", cmd->name);
422: db_end_line();
423: cmd++;
424: }
425: }
426:
427: void
428: db_command_loop()
429: {
430: /*
431: * Initialize 'prev' and 'next' to dot.
432: */
433: db_prev = db_dot;
434: db_next = db_dot;
435:
436: db_cmd_loop_done = 0;
437: while (!db_cmd_loop_done) {
438:
439: (void) setjmp(db_jmpbuf);
440: if (db_print_position() != 0)
441: db_printf("\n");
442:
443: db_printf("db> ");
444: (void) db_read_line();
445:
446: db_command(&db_last_command, db_command_table);
447: }
448: }
449:
450: void
451: db_error(s)
452: char *s;
453: {
454: if (s)
455: db_printf(s);
456: db_flush_lex();
457: longjmp(db_jmpbuf, 1);
458: }
459:
460:
461: /*
462: * Call random function:
463: * !expr(arg,arg,arg)
464: */
465: void
466: db_fncall()
467: {
468: db_expr_t fn_addr;
469: #define MAXARGS 11
470: db_expr_t args[MAXARGS];
471: int nargs = 0;
472: db_expr_t retval;
473: db_expr_t (*func)();
474: int t;
475:
476: if (!db_expression(&fn_addr)) {
477: db_printf("Bad function\n");
478: db_flush_lex();
479: return;
480: }
481: func = (db_expr_t (*) ()) fn_addr;
482:
483: t = db_read_token();
484: if (t == tLPAREN) {
485: if (db_expression(&args[0])) {
486: nargs++;
487: while ((t = db_read_token()) == tCOMMA) {
488: if (nargs == MAXARGS) {
489: db_printf("Too many arguments\n");
490: db_flush_lex();
491: return;
492: }
493: if (!db_expression(&args[nargs])) {
494: db_printf("Argument missing\n");
495: db_flush_lex();
496: return;
497: }
498: nargs++;
499: }
500: db_unread_token(t);
501: }
502: if (db_read_token() != tRPAREN) {
503: db_printf("?\n");
504: db_flush_lex();
505: return;
506: }
507: }
508: db_skip_to_eol();
509:
510: while (nargs < MAXARGS) {
511: args[nargs++] = 0;
512: }
513:
514: retval = (*func)(args[0], args[1], args[2], args[3], args[4],
515: args[5], args[6], args[7], args[8], args[9] );
516: db_printf("%#n\n", retval);
517: }
518:
519: int
520: strcmp(s1, s2)
521: register const char *s1, *s2;
522: {
523: while (*s1 == *s2++)
524: if (*s1++ == 0)
525: return (0);
526: return (*(unsigned char *)s1 - *(unsigned char *)--s2);
527: }
528:
529:
530:
531:
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.