![[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 $
1.1.1.2 ! root 29: * Revision 1.2 1993/03/21 18:08:04 cgd
! 30: * after 0.2.2 "stable" patches applied
! 31: *
! 32: * Revision 1.1.1.1 93/03/21 09:46:26 cgd
! 33: * initial import of 386bsd-0.1 sources
! 34: *
1.1 root 35: * Revision 1.1 1992/03/25 21:45:02 pace
36: * Initial revision
37: *
38: * Revision 2.6 91/02/05 17:06:10 mrt
39: * Changed to new Mach copyright
40: * [91/01/31 16:17:18 mrt]
41: *
42: * Revision 2.5 91/01/08 17:31:54 rpd
43: * Forward reference for db_fncall();
44: * [91/01/04 12:35:17 rvb]
45: *
46: * Add call as a synonym for ! and match for next
47: * [91/01/04 12:14:48 rvb]
48: *
49: * Revision 2.4 90/11/07 16:49:15 rpd
50: * Added search.
51: * [90/11/06 rpd]
52: *
53: * Revision 2.3 90/10/25 14:43:45 rwd
54: * Changed db_fncall to print the result unsigned.
55: * [90/10/19 rpd]
56: *
57: * Added CS_MORE to db_watchpoint_cmd.
58: * [90/10/17 rpd]
59: * Added watchpoint commands: watch, dwatch, show watches.
60: * [90/10/16 rpd]
61: *
62: * Revision 2.2 90/08/27 21:50:10 dbg
63: * Remove 'listbreaks' - use 'show breaks' instead. Change 'show
64: * threads' to 'show all threads' to avoid clash with 'show thread'.
65: * Set 'dot' here from db_prev or db_next, depending on 'db_ed_style'
66: * flag and syntax table.
67: * [90/08/22 dbg]
68: * Reduce lint.
69: * [90/08/07 dbg]
70: * Created.
71: * [90/07/25 dbg]
72: *
73: */
74: /*
75: * Author: David B. Golub, Carnegie Mellon University
76: * Date: 7/90
77: */
78: /*
79: * Command dispatcher.
80: */
81: #include "param.h"
82: #include "proc.h"
83: #include <machine/db_machdep.h> /* type definitions */
84:
85: #include <ddb/db_lex.h>
86: #include <ddb/db_output.h>
87:
88: #include <setjmp.h>
89:
90: /*
91: * Exported global variables
92: */
93: boolean_t db_cmd_loop_done;
94: jmp_buf db_jmpbuf;
95: db_addr_t db_dot;
96: db_addr_t db_last_addr;
97: db_addr_t db_prev;
98: db_addr_t db_next;
99:
100: /*
101: * if 'ed' style: 'dot' is set at start of last item printed,
102: * and '+' points to next line.
103: * Otherwise: 'dot' points to next item, '..' points to last.
104: */
105: boolean_t db_ed_style = TRUE;
106:
107:
108: /*
109: * Utility routine - discard tokens through end-of-line.
110: */
111: void
112: db_skip_to_eol()
113: {
114: int t;
115: do {
116: t = db_read_token();
117: } while (t != tEOL);
118: }
119:
120: /*
121: * Command table
122: */
123: struct command {
124: char * name; /* command name */
125: void (*fcn)(); /* function to call */
126: int flag; /* extra info: */
127: #define CS_OWN 0x1 /* non-standard syntax */
128: #define CS_MORE 0x2 /* standard syntax, but may have other
129: words at end */
130: #define CS_SET_DOT 0x100 /* set dot after command */
131: struct command *more; /* another level of command */
132: };
133:
134: /*
135: * Results of command search.
136: */
137: #define CMD_UNIQUE 0
138: #define CMD_FOUND 1
139: #define CMD_NONE 2
140: #define CMD_AMBIGUOUS 3
141: #define CMD_HELP 4
142:
143: /*
144: * Search for command prefix.
145: */
146: int
147: db_cmd_search(name, table, cmdp)
148: char * name;
149: struct command *table;
150: struct command **cmdp; /* out */
151: {
152: struct command *cmd;
153: int result = CMD_NONE;
154:
155: for (cmd = table; cmd->name != 0; cmd++) {
156: register char *lp;
157: register char *rp;
158: register int c;
159:
160: lp = name;
161: rp = cmd->name;
162: while ((c = *lp) == *rp) {
163: if (c == 0) {
164: /* complete match */
165: *cmdp = cmd;
166: return (CMD_UNIQUE);
167: }
168: lp++;
169: rp++;
170: }
171: if (c == 0) {
172: /* end of name, not end of command -
173: partial match */
174: if (result == CMD_FOUND) {
175: result = CMD_AMBIGUOUS;
176: /* but keep looking for a full match -
177: this lets us match single letters */
178: }
179: else {
180: *cmdp = cmd;
181: result = CMD_FOUND;
182: }
183: }
184: }
185: if (result == CMD_NONE) {
186: /* check for 'help' */
187: if (name[0] == 'h' && name[1] == 'e'
188: && name[2] == 'l' && name[3] == 'p')
189: result = CMD_HELP;
190: }
191: return (result);
192: }
193:
194: void
195: db_cmd_list(table)
196: struct command *table;
197: {
198: register struct command *cmd;
199:
200: for (cmd = table; cmd->name != 0; cmd++) {
201: db_printf("%-12s", cmd->name);
202: db_end_line();
203: }
204: }
205:
206: void
207: db_command(last_cmdp, cmd_table)
208: struct command **last_cmdp; /* IN_OUT */
209: struct command *cmd_table;
210: {
211: struct command *cmd;
212: int t;
213: char modif[TOK_STRING_SIZE];
214: db_expr_t addr, count;
215: boolean_t have_addr;
216: int result;
217:
218: t = db_read_token();
219: if (t == tEOL) {
220: /* empty line repeats last command, at 'next' */
221: cmd = *last_cmdp;
222: addr = (db_expr_t)db_next;
223: have_addr = FALSE;
224: count = 1;
225: modif[0] = '\0';
226: }
227: else if (t == tEXCL) {
228: void db_fncall();
229: db_fncall();
230: return;
231: }
232: else if (t != tIDENT) {
233: db_printf("?\n");
234: db_flush_lex();
235: return;
236: }
237: else {
238: /*
239: * Search for command
240: */
241: while (cmd_table) {
242: result = db_cmd_search(db_tok_string,
243: cmd_table,
244: &cmd);
245: switch (result) {
246: case CMD_NONE:
247: db_printf("No such command\n");
248: db_flush_lex();
249: return;
250: case CMD_AMBIGUOUS:
251: db_printf("Ambiguous\n");
252: db_flush_lex();
253: return;
254: case CMD_HELP:
255: db_cmd_list(cmd_table);
256: db_flush_lex();
257: return;
258: default:
259: break;
260: }
261: if ((cmd_table = cmd->more) != 0) {
262: t = db_read_token();
263: if (t != tIDENT) {
264: db_cmd_list(cmd_table);
265: db_flush_lex();
266: return;
267: }
268: }
269: }
270:
271: if ((cmd->flag & CS_OWN) == 0) {
272: /*
273: * Standard syntax:
274: * command [/modifier] [addr] [,count]
275: */
276: t = db_read_token();
277: if (t == tSLASH) {
278: t = db_read_token();
279: if (t != tIDENT) {
280: db_printf("Bad modifier\n");
281: db_flush_lex();
282: return;
283: }
284: db_strcpy(modif, db_tok_string);
285: }
286: else {
287: db_unread_token(t);
288: modif[0] = '\0';
289: }
290:
291: if (db_expression(&addr)) {
292: db_dot = (db_addr_t) addr;
293: db_last_addr = db_dot;
294: have_addr = TRUE;
295: }
296: else {
297: addr = (db_expr_t) db_dot;
298: have_addr = FALSE;
299: }
300: t = db_read_token();
301: if (t == tCOMMA) {
302: if (!db_expression(&count)) {
303: db_printf("Count missing\n");
304: db_flush_lex();
305: return;
306: }
307: }
308: else {
309: db_unread_token(t);
310: count = -1;
311: }
312: if ((cmd->flag & CS_MORE) == 0) {
313: db_skip_to_eol();
314: }
315: }
316: }
317: *last_cmdp = cmd;
318: if (cmd != 0) {
319: /*
320: * Execute the command.
321: */
322: (*cmd->fcn)(addr, have_addr, count, modif);
323:
324: if (cmd->flag & CS_SET_DOT) {
325: /*
326: * If command changes dot, set dot to
327: * previous address displayed (if 'ed' style).
328: */
329: if (db_ed_style) {
330: db_dot = db_prev;
331: }
332: else {
333: db_dot = db_next;
334: }
335: }
336: else {
337: /*
338: * If command does not change dot,
339: * set 'next' location to be the same.
340: */
341: db_next = db_dot;
342: }
343: }
344: }
345:
346: /*
347: * 'show' commands
348: */
349: extern void db_listbreak_cmd();
350: extern void db_listwatch_cmd();
351: extern void db_show_regs(), db_show_one_thread(), db_show_all_threads();
352: extern void vm_map_print(), vm_object_print(), vm_page_print();
353: extern void ipc_port_print();
354: void db_show_help();
355:
356: struct command db_show_all_cmds[] = {
357: #if 0
358: { "threads", db_show_all_threads,0, 0 },
359: #endif
360: { (char *)0 }
361: };
362:
363: struct command db_show_cmds[] = {
364: { "all", 0, 0, db_show_all_cmds },
365: { "registers", db_show_regs, 0, 0 },
366: { "breaks", db_listbreak_cmd, 0, 0 },
367: { "watches", db_listwatch_cmd, 0, 0 },
368: #if 0
369: { "thread", db_show_one_thread, 0, 0 },
370: #endif
371: { "map", vm_map_print, 0, 0 },
372: { "object", vm_object_print, 0, 0 },
373: #if 0
374: { "page", vm_page_print, 0, 0 },
375: #endif
376: #if 0
377: { "port", ipc_port_print, 0, 0 },
378: #endif
379: { (char *)0, }
380: };
381:
382: extern void db_print_cmd(), db_examine_cmd(), db_set_cmd();
383: extern void db_search_cmd();
384: extern void db_write_cmd();
385: extern void db_delete_cmd(), db_breakpoint_cmd();
386: extern void db_deletewatch_cmd(), db_watchpoint_cmd();
387: extern void db_single_step_cmd(), db_trace_until_call_cmd(),
388: db_trace_until_matching_cmd(), db_continue_cmd();
389: extern void db_stack_trace_cmd();
390: void db_help_cmd();
391: void db_fncall();
392:
393: struct command db_command_table[] = {
394: { "print", db_print_cmd, 0, 0 },
395: { "examine", db_examine_cmd, CS_SET_DOT, 0 },
396: { "x", db_examine_cmd, CS_SET_DOT, 0 },
397: { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
398: { "set", db_set_cmd, CS_OWN, 0 },
399: { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
400: { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
401: { "delete", db_delete_cmd, 0, 0 },
402: { "d", db_delete_cmd, 0, 0 },
403: { "break", db_breakpoint_cmd, 0, 0 },
404: { "dwatch", db_deletewatch_cmd, 0, 0 },
405: { "watch", db_watchpoint_cmd, CS_MORE,0 },
406: { "step", db_single_step_cmd, 0, 0 },
407: { "s", db_single_step_cmd, 0, 0 },
408: { "continue", db_continue_cmd, 0, 0 },
409: { "c", db_continue_cmd, 0, 0 },
410: { "until", db_trace_until_call_cmd,0, 0 },
411: { "next", db_trace_until_matching_cmd,0, 0 },
412: { "match", db_trace_until_matching_cmd,0, 0 },
413: { "trace", db_stack_trace_cmd, 0, 0 },
414: { "call", db_fncall, CS_OWN, 0 },
415: { "show", 0, 0, db_show_cmds },
416: { (char *)0, }
417: };
418:
419: struct command *db_last_command = 0;
420:
421: void
422: db_help_cmd()
423: {
424: struct command *cmd = db_command_table;
425:
426: while (cmd->name != 0) {
427: db_printf("%-12s", cmd->name);
428: db_end_line();
429: cmd++;
430: }
431: }
432:
433: void
434: db_command_loop()
435: {
436: /*
437: * Initialize 'prev' and 'next' to dot.
438: */
439: db_prev = db_dot;
440: db_next = db_dot;
441:
442: db_cmd_loop_done = 0;
443: while (!db_cmd_loop_done) {
444:
445: (void) setjmp(db_jmpbuf);
446: if (db_print_position() != 0)
447: db_printf("\n");
448:
449: db_printf("db> ");
450: (void) db_read_line();
451:
452: db_command(&db_last_command, db_command_table);
453: }
454: }
455:
456: void
457: db_error(s)
458: char *s;
459: {
460: if (s)
461: db_printf(s);
462: db_flush_lex();
463: longjmp(db_jmpbuf, 1);
464: }
465:
466:
467: /*
468: * Call random function:
469: * !expr(arg,arg,arg)
470: */
471: void
472: db_fncall()
473: {
474: db_expr_t fn_addr;
475: #define MAXARGS 11
476: db_expr_t args[MAXARGS];
477: int nargs = 0;
478: db_expr_t retval;
479: db_expr_t (*func)();
480: int t;
481:
482: if (!db_expression(&fn_addr)) {
483: db_printf("Bad function\n");
484: db_flush_lex();
485: return;
486: }
487: func = (db_expr_t (*) ()) fn_addr;
488:
489: t = db_read_token();
490: if (t == tLPAREN) {
491: if (db_expression(&args[0])) {
492: nargs++;
493: while ((t = db_read_token()) == tCOMMA) {
494: if (nargs == MAXARGS) {
495: db_printf("Too many arguments\n");
496: db_flush_lex();
497: return;
498: }
499: if (!db_expression(&args[nargs])) {
500: db_printf("Argument missing\n");
501: db_flush_lex();
502: return;
503: }
504: nargs++;
505: }
506: db_unread_token(t);
507: }
508: if (db_read_token() != tRPAREN) {
509: db_printf("?\n");
510: db_flush_lex();
511: return;
512: }
513: }
514: db_skip_to_eol();
515:
516: while (nargs < MAXARGS) {
517: args[nargs++] = 0;
518: }
519:
520: retval = (*func)(args[0], args[1], args[2], args[3], args[4],
521: args[5], args[6], args[7], args[8], args[9] );
522: db_printf("%#n\n", retval);
523: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.