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kdump.c revision 1.1.1.1 
      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
     35 static 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
     41 static char sccsid[] = "@(#)kdump.c	8.1 (Berkeley) 6/6/93";
     42 #endif /* not lint */
     43 
     44 #include <sys/param.h>
     45 #include <sys/errno.h>
     46 #include <sys/time.h>
     47 #include <sys/uio.h>
     48 #include <sys/ktrace.h>
     49 #include <sys/ioctl.h>
     50 #include <sys/ptrace.h>
     51 #define KERNEL
     52 #include <sys/errno.h>
     53 #undef KERNEL
     54 #include <vis.h>
     55 #include <stdio.h>
     56 #include <stdlib.h>
     57 #include <string.h>
     58 #include "ktrace.h"
     59 
     60 int timestamp, decimal, fancy = 1, tail, maxdata;
     61 char *tracefile = DEF_TRACEFILE;
     62 struct ktr_header ktr_header;
     63 
     64 #define eqs(s1, s2)	(strcmp((s1), (s2)) == 0)
     65 
     66 main(argc, argv)
     67 	int argc;
     68 	char *argv[];
     69 {
     70 	extern int optind;
     71 	extern char *optarg;
     72 	int ch, ktrlen, size;
     73 	register void *m;
     74 	int trpoints = ALL_POINTS;
     75 
     76 	while ((ch = getopt(argc,argv,"f:dlm:nRTt:")) != EOF)
     77 		switch((char)ch) {
     78 		case 'f':
     79 			tracefile = optarg;
     80 			break;
     81 		case 'd':
     82 			decimal = 1;
     83 			break;
     84 		case 'l':
     85 			tail = 1;
     86 			break;
     87 		case 'm':
     88 			maxdata = atoi(optarg);
     89 			break;
     90 		case 'n':
     91 			fancy = 0;
     92 			break;
     93 		case 'R':
     94 			timestamp = 2;	/* relative timestamp */
     95 			break;
     96 		case 'T':
     97 			timestamp = 1;
     98 			break;
     99 		case 't':
    100 			trpoints = getpoints(optarg);
    101 			if (trpoints < 0) {
    102 				(void)fprintf(stderr,
    103 				    "kdump: unknown trace point in %s\n",
    104 				    optarg);
    105 				exit(1);
    106 			}
    107 			break;
    108 		default:
    109 			usage();
    110 		}
    111 	argv += optind;
    112 	argc -= optind;
    113 
    114 	if (argc > 1)
    115 		usage();
    116 
    117 	m = (void *)malloc(size = 1025);
    118 	if (m == NULL) {
    119 		(void)fprintf(stderr, "kdump: %s.\n", strerror(ENOMEM));
    120 		exit(1);
    121 	}
    122 	if (!freopen(tracefile, "r", stdin)) {
    123 		(void)fprintf(stderr,
    124 		    "kdump: %s: %s.\n", tracefile, strerror(errno));
    125 		exit(1);
    126 	}
    127 	while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) {
    128 		if (trpoints & (1<<ktr_header.ktr_type))
    129 			dumpheader(&ktr_header);
    130 		if ((ktrlen = ktr_header.ktr_len) < 0) {
    131 			(void)fprintf(stderr,
    132 			    "kdump: bogus length 0x%x\n", ktrlen);
    133 			exit(1);
    134 		}
    135 		if (ktrlen > size) {
    136 			m = (void *)realloc(m, ktrlen+1);
    137 			if (m == NULL) {
    138 				(void)fprintf(stderr,
    139 				    "kdump: %s.\n", strerror(ENOMEM));
    140 				exit(1);
    141 			}
    142 			size = ktrlen;
    143 		}
    144 		if (ktrlen && fread_tail(m, ktrlen, 1) == 0) {
    145 			(void)fprintf(stderr, "kdump: data too short.\n");
    146 			exit(1);
    147 		}
    148 		if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
    149 			continue;
    150 		switch (ktr_header.ktr_type) {
    151 		case KTR_SYSCALL:
    152 			ktrsyscall((struct ktr_syscall *)m);
    153 			break;
    154 		case KTR_SYSRET:
    155 			ktrsysret((struct ktr_sysret *)m);
    156 			break;
    157 		case KTR_NAMEI:
    158 			ktrnamei(m, ktrlen);
    159 			break;
    160 		case KTR_GENIO:
    161 			ktrgenio((struct ktr_genio *)m, ktrlen);
    162 			break;
    163 		case KTR_PSIG:
    164 			ktrpsig((struct ktr_psig *)m);
    165 			break;
    166 		case KTR_CSW:
    167 			ktrcsw((struct ktr_csw *)m);
    168 			break;
    169 		}
    170 		if (tail)
    171 			(void)fflush(stdout);
    172 	}
    173 }
    174 
    175 fread_tail(buf, size, num)
    176 	char *buf;
    177 	int num, size;
    178 {
    179 	int i;
    180 
    181 	while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
    182 		(void)sleep(1);
    183 		clearerr(stdin);
    184 	}
    185 	return (i);
    186 }
    187 
    188 dumpheader(kth)
    189 	struct ktr_header *kth;
    190 {
    191 	static char unknown[64];
    192 	static struct timeval prevtime, temp;
    193 	char *type;
    194 
    195 	switch (kth->ktr_type) {
    196 	case KTR_SYSCALL:
    197 		type = "CALL";
    198 		break;
    199 	case KTR_SYSRET:
    200 		type = "RET ";
    201 		break;
    202 	case KTR_NAMEI:
    203 		type = "NAMI";
    204 		break;
    205 	case KTR_GENIO:
    206 		type = "GIO ";
    207 		break;
    208 	case KTR_PSIG:
    209 		type = "PSIG";
    210 		break;
    211 	case KTR_CSW:
    212 		type = "CSW";
    213 		break;
    214 	default:
    215 		(void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
    216 		type = unknown;
    217 	}
    218 
    219 	(void)printf("%6d %-8s ", kth->ktr_pid, kth->ktr_comm);
    220 	if (timestamp) {
    221 		if (timestamp == 2) {
    222 			temp = kth->ktr_time;
    223 			timevalsub(&kth->ktr_time, &prevtime);
    224 			prevtime = temp;
    225 		}
    226 		(void)printf("%ld.%06ld ",
    227 		    kth->ktr_time.tv_sec, kth->ktr_time.tv_usec);
    228 	}
    229 	(void)printf("%s  ", type);
    230 }
    231 
    232 #include <sys/syscall.h>
    233 #define KTRACE
    234 #include "/sys/kern/syscalls.c"
    235 #undef KTRACE
    236 int nsyscalls = sizeof (syscallnames) / sizeof (syscallnames[0]);
    237 
    238 static char *ptrace_ops[] = {
    239 	"PT_TRACE_ME",	"PT_READ_I",	"PT_READ_D",	"PT_READ_U",
    240 	"PT_WRITE_I",	"PT_WRITE_D",	"PT_WRITE_U",	"PT_CONTINUE",
    241 	"PT_KILL",	"PT_STEP",
    242 };
    243 
    244 ktrsyscall(ktr)
    245 	register struct ktr_syscall *ktr;
    246 {
    247 	register narg = ktr->ktr_narg;
    248 	register int *ip;
    249 	char *ioctlname();
    250 
    251 	if (ktr->ktr_code >= nsyscalls || ktr->ktr_code < 0)
    252 		(void)printf("[%d]", ktr->ktr_code);
    253 	else
    254 		(void)printf("%s", syscallnames[ktr->ktr_code]);
    255 	ip = (int *)((char *)ktr + sizeof(struct ktr_syscall));
    256 	if (narg) {
    257 		char c = '(';
    258 		if (fancy) {
    259 			if (ktr->ktr_code == SYS_ioctl) {
    260 				char *cp;
    261 				if (decimal)
    262 					(void)printf("(%d", *ip);
    263 				else
    264 					(void)printf("(%#x", *ip);
    265 				ip++;
    266 				narg--;
    267 				if ((cp = ioctlname(*ip)) != NULL)
    268 					(void)printf(",%s", cp);
    269 				else {
    270 					if (decimal)
    271 						(void)printf(",%d", *ip);
    272 					else
    273 						(void)printf(",%#x ", *ip);
    274 				}
    275 				c = ',';
    276 				ip++;
    277 				narg--;
    278 			} else if (ktr->ktr_code == SYS_ptrace) {
    279 				if (*ip <= PT_STEP && *ip >= 0)
    280 					(void)printf("(%s", ptrace_ops[*ip]);
    281 				else
    282 					(void)printf("(%d", *ip);
    283 				c = ',';
    284 				ip++;
    285 				narg--;
    286 			}
    287 		}
    288 		while (narg) {
    289 			if (decimal)
    290 				(void)printf("%c%d", c, *ip);
    291 			else
    292 				(void)printf("%c%#x", c, *ip);
    293 			c = ',';
    294 			ip++;
    295 			narg--;
    296 		}
    297 		(void)putchar(')');
    298 	}
    299 	(void)putchar('\n');
    300 }
    301 
    302 ktrsysret(ktr)
    303 	struct ktr_sysret *ktr;
    304 {
    305 	register int ret = ktr->ktr_retval;
    306 	register int error = ktr->ktr_error;
    307 	register int code = ktr->ktr_code;
    308 
    309 	if (code >= nsyscalls || code < 0)
    310 		(void)printf("[%d] ", code);
    311 	else
    312 		(void)printf("%s ", syscallnames[code]);
    313 
    314 	if (error == 0) {
    315 		if (fancy) {
    316 			(void)printf("%d", ret);
    317 			if (ret < 0 || ret > 9)
    318 				(void)printf("/%#x", ret);
    319 		} else {
    320 			if (decimal)
    321 				(void)printf("%d", ret);
    322 			else
    323 				(void)printf("%#x", ret);
    324 		}
    325 	} else if (error == ERESTART)
    326 		(void)printf("RESTART");
    327 	else if (error == EJUSTRETURN)
    328 		(void)printf("JUSTRETURN");
    329 	else {
    330 		(void)printf("-1 errno %d", ktr->ktr_error);
    331 		if (fancy)
    332 			(void)printf(" %s", strerror(ktr->ktr_error));
    333 	}
    334 	(void)putchar('\n');
    335 }
    336 
    337 ktrnamei(cp, len)
    338 	char *cp;
    339 {
    340 	(void)printf("\"%.*s\"\n", len, cp);
    341 }
    342 
    343 ktrgenio(ktr, len)
    344 	struct ktr_genio *ktr;
    345 {
    346 	register int datalen = len - sizeof (struct ktr_genio);
    347 	register char *dp = (char *)ktr + sizeof (struct ktr_genio);
    348 	register char *cp;
    349 	register int col = 0;
    350 	register width;
    351 	char visbuf[5];
    352 	static screenwidth = 0;
    353 
    354 	if (screenwidth == 0) {
    355 		struct winsize ws;
    356 
    357 		if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
    358 		    ws.ws_col > 8)
    359 			screenwidth = ws.ws_col;
    360 		else
    361 			screenwidth = 80;
    362 	}
    363 	printf("fd %d %s %d bytes\n", ktr->ktr_fd,
    364 		ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen);
    365 	if (maxdata && datalen > maxdata)
    366 		datalen = maxdata;
    367 	(void)printf("       \"");
    368 	col = 8;
    369 	for (;datalen > 0; datalen--, dp++) {
    370 		(void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
    371 		cp = visbuf;
    372 		/*
    373 		 * Keep track of printables and
    374 		 * space chars (like fold(1)).
    375 		 */
    376 		if (col == 0) {
    377 			(void)putchar('\t');
    378 			col = 8;
    379 		}
    380 		switch(*cp) {
    381 		case '\n':
    382 			col = 0;
    383 			(void)putchar('\n');
    384 			continue;
    385 		case '\t':
    386 			width = 8 - (col&07);
    387 			break;
    388 		default:
    389 			width = strlen(cp);
    390 		}
    391 		if (col + width > (screenwidth-2)) {
    392 			(void)printf("\\\n\t");
    393 			col = 8;
    394 		}
    395 		col += width;
    396 		do {
    397 			(void)putchar(*cp++);
    398 		} while (*cp);
    399 	}
    400 	if (col == 0)
    401 		(void)printf("       ");
    402 	(void)printf("\"\n");
    403 }
    404 
    405 char *signames[] = {
    406 	"NULL", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",	/*  1 - 6  */
    407 	"EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",		/*  7 - 12 */
    408 	"PIPE", "ALRM",  "TERM", "URG", "STOP", "TSTP",		/* 13 - 18 */
    409 	"CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",		/* 19 - 24 */
    410 	"XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1",	/* 25 - 30 */
    411 	"USR2", NULL,						/* 31 - 32 */
    412 };
    413 
    414 ktrpsig(psig)
    415 	struct ktr_psig *psig;
    416 {
    417 	(void)printf("SIG%s ", signames[psig->signo]);
    418 	if (psig->action == SIG_DFL)
    419 		(void)printf("SIG_DFL\n");
    420 	else
    421 		(void)printf("caught handler=0x%x mask=0x%x code=0x%x\n",
    422 		    (u_int)psig->action, psig->mask, psig->code);
    423 }
    424 
    425 ktrcsw(cs)
    426 	struct ktr_csw *cs;
    427 {
    428 	(void)printf("%s %s\n", cs->out ? "stop" : "resume",
    429 		cs->user ? "user" : "kernel");
    430 }
    431 
    432 usage()
    433 {
    434 	(void)fprintf(stderr,
    435 	    "usage: kdump [-dnlRT] [-f trfile] [-m maxdata] [-t [cnis]]\n");
    436 	exit(1);
    437 }
    438