kdump.c revision 18470 
1/*-
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1988, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)kdump.c	8.1 (Berkeley) 6/6/93";
42#endif /* not lint */
43
44#define KERNEL
45extern int errno;
46#include <sys/errno.h>
47#undef KERNEL
48#include <sys/param.h>
49#include <sys/errno.h>
50#include <sys/time.h>
51#include <sys/uio.h>
52#include <sys/ktrace.h>
53#include <sys/ioctl.h>
54#include <sys/ptrace.h>
55#include <vis.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <locale.h>
60#include "ktrace.h"
61
62int timestamp, decimal, fancy = 1, tail, maxdata;
63char *tracefile = DEF_TRACEFILE;
64struct ktr_header ktr_header;
65
66#define eqs(s1, s2)	(strcmp((s1), (s2)) == 0)
67
68main(argc, argv)
69	int argc;
70	char *argv[];
71{
72	extern int optind;
73	extern char *optarg;
74	int ch, ktrlen, size;
75	register void *m;
76	int trpoints = ALL_POINTS;
77
78	(void) setlocale(LC_CTYPE, "");
79
80	while ((ch = getopt(argc,argv,"f:dlm:nRTt:")) != EOF)
81		switch((char)ch) {
82		case 'f':
83			tracefile = optarg;
84			break;
85		case 'd':
86			decimal = 1;
87			break;
88		case 'l':
89			tail = 1;
90			break;
91		case 'm':
92			maxdata = atoi(optarg);
93			break;
94		case 'n':
95			fancy = 0;
96			break;
97		case 'R':
98			timestamp = 2;	/* relative timestamp */
99			break;
100		case 'T':
101			timestamp = 1;
102			break;
103		case 't':
104			trpoints = getpoints(optarg);
105			if (trpoints < 0) {
106				(void)fprintf(stderr,
107				    "kdump: unknown trace point in %s\n",
108				    optarg);
109				exit(1);
110			}
111			break;
112		default:
113			usage();
114		}
115	argv += optind;
116	argc -= optind;
117
118	if (argc > 1)
119		usage();
120
121	m = (void *)malloc(size = 1025);
122	if (m == NULL) {
123		(void)fprintf(stderr, "kdump: %s.\n", strerror(ENOMEM));
124		exit(1);
125	}
126	if (!freopen(tracefile, "r", stdin)) {
127		(void)fprintf(stderr,
128		    "kdump: %s: %s.\n", tracefile, strerror(errno));
129		exit(1);
130	}
131	while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) {
132		if (trpoints & (1<<ktr_header.ktr_type))
133			dumpheader(&ktr_header);
134		if ((ktrlen = ktr_header.ktr_len) < 0) {
135			(void)fprintf(stderr,
136			    "kdump: bogus length 0x%x\n", ktrlen);
137			exit(1);
138		}
139		if (ktrlen > size) {
140			m = (void *)realloc(m, ktrlen+1);
141			if (m == NULL) {
142				(void)fprintf(stderr,
143				    "kdump: %s.\n", strerror(ENOMEM));
144				exit(1);
145			}
146			size = ktrlen;
147		}
148		if (ktrlen && fread_tail(m, ktrlen, 1) == 0) {
149			(void)fprintf(stderr, "kdump: data too short.\n");
150			exit(1);
151		}
152		if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
153			continue;
154		switch (ktr_header.ktr_type) {
155		case KTR_SYSCALL:
156			ktrsyscall((struct ktr_syscall *)m);
157			break;
158		case KTR_SYSRET:
159			ktrsysret((struct ktr_sysret *)m);
160			break;
161		case KTR_NAMEI:
162			ktrnamei(m, ktrlen);
163			break;
164		case KTR_GENIO:
165			ktrgenio((struct ktr_genio *)m, ktrlen);
166			break;
167		case KTR_PSIG:
168			ktrpsig((struct ktr_psig *)m);
169			break;
170		case KTR_CSW:
171			ktrcsw((struct ktr_csw *)m);
172			break;
173		case KTR_USER:
174			ktruser(ktrlen, m);
175			break;
176		}
177		if (tail)
178			(void)fflush(stdout);
179	}
180}
181
182fread_tail(buf, size, num)
183	char *buf;
184	int num, size;
185{
186	int i;
187
188	while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
189		(void)sleep(1);
190		clearerr(stdin);
191	}
192	return (i);
193}
194
195dumpheader(kth)
196	struct ktr_header *kth;
197{
198	static char unknown[64];
199	static struct timeval prevtime, temp;
200	char *type;
201
202	switch (kth->ktr_type) {
203	case KTR_SYSCALL:
204		type = "CALL";
205		break;
206	case KTR_SYSRET:
207		type = "RET ";
208		break;
209	case KTR_NAMEI:
210		type = "NAMI";
211		break;
212	case KTR_GENIO:
213		type = "GIO ";
214		break;
215	case KTR_PSIG:
216		type = "PSIG";
217		break;
218	case KTR_CSW:
219		type = "CSW";
220		break;
221	case KTR_USER:
222		type = "USER";
223		break;
224	default:
225		(void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
226		type = unknown;
227	}
228
229	(void)printf("%6d %-8s ", kth->ktr_pid, kth->ktr_comm);
230	if (timestamp) {
231		if (timestamp == 2) {
232			temp = kth->ktr_time;
233			timevalsub(&kth->ktr_time, &prevtime);
234			prevtime = temp;
235		}
236		(void)printf("%ld.%06ld ",
237		    kth->ktr_time.tv_sec, kth->ktr_time.tv_usec);
238	}
239	(void)printf("%s  ", type);
240}
241
242#include <sys/syscall.h>
243#define KTRACE
244#include <sys/kern/syscalls.c>
245#undef KTRACE
246int nsyscalls = sizeof (syscallnames) / sizeof (syscallnames[0]);
247
248static char *ptrace_ops[] = {
249	"PT_TRACE_ME",	"PT_READ_I",	"PT_READ_D",	"PT_READ_U",
250	"PT_WRITE_I",	"PT_WRITE_D",	"PT_WRITE_U",	"PT_CONTINUE",
251	"PT_KILL",	"PT_STEP",
252};
253
254ktrsyscall(ktr)
255	register struct ktr_syscall *ktr;
256{
257	register narg = ktr->ktr_narg;
258	register int *ip;
259	char *ioctlname();
260
261	if (ktr->ktr_code >= nsyscalls || ktr->ktr_code < 0)
262		(void)printf("[%d]", ktr->ktr_code);
263	else
264		(void)printf("%s", syscallnames[ktr->ktr_code]);
265	ip = (int *)((char *)ktr + sizeof(struct ktr_syscall));
266	if (narg) {
267		char c = '(';
268		if (fancy) {
269			if (ktr->ktr_code == SYS_ioctl) {
270				char *cp;
271				if (decimal)
272					(void)printf("(%d", *ip);
273				else
274					(void)printf("(%#x", *ip);
275				ip++;
276				narg--;
277				if ((cp = ioctlname(*ip)) != NULL)
278					(void)printf(",%s", cp);
279				else {
280					if (decimal)
281						(void)printf(",%d", *ip);
282					else
283						(void)printf(",%#x ", *ip);
284				}
285				c = ',';
286				ip++;
287				narg--;
288			} else if (ktr->ktr_code == SYS_ptrace) {
289				if (*ip <= PT_STEP && *ip >= 0)
290					(void)printf("(%s", ptrace_ops[*ip]);
291				else
292					(void)printf("(%d", *ip);
293				c = ',';
294				ip++;
295				narg--;
296			}
297		}
298		while (narg) {
299			if (decimal)
300				(void)printf("%c%d", c, *ip);
301			else
302				(void)printf("%c%#x", c, *ip);
303			c = ',';
304			ip++;
305			narg--;
306		}
307		(void)putchar(')');
308	}
309	(void)putchar('\n');
310}
311
312ktrsysret(ktr)
313	struct ktr_sysret *ktr;
314{
315	register int ret = ktr->ktr_retval;
316	register int error = ktr->ktr_error;
317	register int code = ktr->ktr_code;
318
319	if (code >= nsyscalls || code < 0)
320		(void)printf("[%d] ", code);
321	else
322		(void)printf("%s ", syscallnames[code]);
323
324	if (error == 0) {
325		if (fancy) {
326			(void)printf("%d", ret);
327			if (ret < 0 || ret > 9)
328				(void)printf("/%#x", ret);
329		} else {
330			if (decimal)
331				(void)printf("%d", ret);
332			else
333				(void)printf("%#x", ret);
334		}
335	} else if (error == ERESTART)
336		(void)printf("RESTART");
337	else if (error == EJUSTRETURN)
338		(void)printf("JUSTRETURN");
339	else {
340		(void)printf("-1 errno %d", ktr->ktr_error);
341		if (fancy)
342			(void)printf(" %s", strerror(ktr->ktr_error));
343	}
344	(void)putchar('\n');
345}
346
347ktrnamei(cp, len)
348	char *cp;
349{
350	(void)printf("\"%.*s\"\n", len, cp);
351}
352
353ktrgenio(ktr, len)
354	struct ktr_genio *ktr;
355{
356	register int datalen = len - sizeof (struct ktr_genio);
357	register char *dp = (char *)ktr + sizeof (struct ktr_genio);
358	register char *cp;
359	register int col = 0;
360	register width;
361	char visbuf[5];
362	static screenwidth = 0;
363
364	if (screenwidth == 0) {
365		struct winsize ws;
366
367		if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
368		    ws.ws_col > 8)
369			screenwidth = ws.ws_col;
370		else
371			screenwidth = 80;
372	}
373	printf("fd %d %s %d bytes\n", ktr->ktr_fd,
374		ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen);
375	if (maxdata && datalen > maxdata)
376		datalen = maxdata;
377	(void)printf("       \"");
378	col = 8;
379	for (;datalen > 0; datalen--, dp++) {
380		(void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
381		cp = visbuf;
382		/*
383		 * Keep track of printables and
384		 * space chars (like fold(1)).
385		 */
386		if (col == 0) {
387			(void)putchar('\t');
388			col = 8;
389		}
390		switch(*cp) {
391		case '\n':
392			col = 0;
393			(void)putchar('\n');
394			continue;
395		case '\t':
396			width = 8 - (col&07);
397			break;
398		default:
399			width = strlen(cp);
400		}
401		if (col + width > (screenwidth-2)) {
402			(void)printf("\\\n\t");
403			col = 8;
404		}
405		col += width;
406		do {
407			(void)putchar(*cp++);
408		} while (*cp);
409	}
410	if (col == 0)
411		(void)printf("       ");
412	(void)printf("\"\n");
413}
414
415char *signames[] = {
416	"NULL", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",	/*  1 - 6  */
417	"EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",		/*  7 - 12 */
418	"PIPE", "ALRM",  "TERM", "URG", "STOP", "TSTP",		/* 13 - 18 */
419	"CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",		/* 19 - 24 */
420	"XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1",	/* 25 - 30 */
421	"USR2", NULL,						/* 31 - 32 */
422};
423
424ktrpsig(psig)
425	struct ktr_psig *psig;
426{
427	(void)printf("SIG%s ", signames[psig->signo]);
428	if (psig->action == SIG_DFL)
429		(void)printf("SIG_DFL\n");
430	else
431		(void)printf("caught handler=0x%x mask=0x%x code=0x%x\n",
432		    (u_int)psig->action, psig->mask, psig->code);
433}
434
435ktrcsw(cs)
436	struct ktr_csw *cs;
437{
438	(void)printf("%s %s\n", cs->out ? "stop" : "resume",
439		cs->user ? "user" : "kernel");
440}
441
442ktruser(len, p)
443	int len;
444	unsigned char *p;
445{
446	(void)printf("%d ", len);
447	while (len--)
448		(void)printf(" %02x", *p++);
449	(void)printf("\n");
450
451}
452
453usage()
454{
455	(void)fprintf(stderr,
456	    "usage: kdump [-dnlRT] [-f trfile] [-m maxdata] [-t [cnisuw]]\n");
457	exit(1);
458}
459