610 lines
14 KiB
C
610 lines
14 KiB
C
/*-
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)kdump.c 8.1 (Berkeley) 6/6/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define _KERNEL
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extern int errno;
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#include <sys/errno.h>
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#undef _KERNEL
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#include <sys/param.h>
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#include <sys/errno.h>
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#define _KERNEL
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#include <sys/time.h>
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#undef _KERNEL
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#include <sys/uio.h>
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#include <sys/ktrace.h>
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#include <sys/ioctl.h>
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#include <sys/ptrace.h>
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#include <err.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "ktrace.h"
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int fread_tail(void *, int, int);
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void dumpheader(struct ktr_header *);
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void ktrsyscall(struct ktr_syscall *);
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void ktrsysret(struct ktr_sysret *);
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void ktrnamei(char *, int);
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void hexdump(char *, int, int);
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void visdump(char *, int, int);
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void ktrgenio(struct ktr_genio *, int);
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void ktrpsig(struct ktr_psig *);
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void ktrcsw(struct ktr_csw *);
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void ktruser(int, unsigned char *);
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void usage(void);
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const char *ioctlname(u_long);
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int timestamp, decimal, fancy = 1, suppressdata, tail, threads, maxdata;
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const char *tracefile = DEF_TRACEFILE;
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struct ktr_header ktr_header;
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#define eqs(s1, s2) (strcmp((s1), (s2)) == 0)
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int
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main(int argc, char *argv[])
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{
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int ch, ktrlen, size;
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void *m;
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int trpoints = ALL_POINTS;
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int drop_logged;
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pid_t pid = 0;
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(void) setlocale(LC_CTYPE, "");
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while ((ch = getopt(argc,argv,"f:dElm:np:HRsTt:")) != -1)
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switch((char)ch) {
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case 'f':
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tracefile = optarg;
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break;
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case 'd':
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decimal = 1;
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break;
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case 'l':
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tail = 1;
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break;
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case 'm':
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maxdata = atoi(optarg);
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break;
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case 'n':
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fancy = 0;
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break;
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case 'p':
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pid = atoi(optarg);
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break;
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case 's':
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suppressdata = 1;
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break;
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case 'E':
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timestamp = 3; /* elapsed timestamp */
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break;
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case 'H':
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threads = 1;
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break;
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case 'R':
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timestamp = 2; /* relative timestamp */
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break;
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case 'T':
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timestamp = 1;
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break;
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case 't':
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trpoints = getpoints(optarg);
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if (trpoints < 0)
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errx(1, "unknown trace point in %s", optarg);
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break;
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default:
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usage();
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}
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if (argc > optind)
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usage();
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m = (void *)malloc(size = 1025);
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if (m == NULL)
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errx(1, "%s", strerror(ENOMEM));
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if (!freopen(tracefile, "r", stdin))
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err(1, "%s", tracefile);
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drop_logged = 0;
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while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) {
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if (ktr_header.ktr_type & KTR_DROP) {
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ktr_header.ktr_type &= ~KTR_DROP;
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if (!drop_logged && threads) {
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(void)printf("%6d %6d %-8.*s Events dropped.\n",
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ktr_header.ktr_pid, ktr_header.ktr_tid >
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0 ? ktr_header.ktr_tid : 0, MAXCOMLEN,
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ktr_header.ktr_comm);
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drop_logged = 1;
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} else if (!drop_logged) {
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(void)printf("%6d %-8.*s Events dropped.\n",
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ktr_header.ktr_pid, MAXCOMLEN,
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ktr_header.ktr_comm);
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drop_logged = 1;
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}
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}
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if (trpoints & (1<<ktr_header.ktr_type))
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if (pid == 0 || ktr_header.ktr_pid == pid)
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dumpheader(&ktr_header);
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if ((ktrlen = ktr_header.ktr_len) < 0)
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errx(1, "bogus length 0x%x", ktrlen);
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if (ktrlen > size) {
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m = (void *)realloc(m, ktrlen+1);
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if (m == NULL)
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errx(1, "%s", strerror(ENOMEM));
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size = ktrlen;
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}
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if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
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errx(1, "data too short");
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if (pid && ktr_header.ktr_pid != pid)
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continue;
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if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
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continue;
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drop_logged = 0;
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switch (ktr_header.ktr_type) {
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case KTR_SYSCALL:
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ktrsyscall((struct ktr_syscall *)m);
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break;
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case KTR_SYSRET:
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ktrsysret((struct ktr_sysret *)m);
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break;
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case KTR_NAMEI:
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ktrnamei(m, ktrlen);
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break;
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case KTR_GENIO:
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ktrgenio((struct ktr_genio *)m, ktrlen);
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break;
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case KTR_PSIG:
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ktrpsig((struct ktr_psig *)m);
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break;
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case KTR_CSW:
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ktrcsw((struct ktr_csw *)m);
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break;
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case KTR_USER:
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ktruser(ktrlen, m);
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break;
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default:
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printf("\n");
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break;
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}
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if (tail)
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(void)fflush(stdout);
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}
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return 0;
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}
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int
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fread_tail(void *buf, int size, int num)
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{
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int i;
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while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
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(void)sleep(1);
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clearerr(stdin);
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}
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return (i);
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}
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void
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dumpheader(struct ktr_header *kth)
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{
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static char unknown[64];
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static struct timeval prevtime, temp;
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const char *type;
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switch (kth->ktr_type) {
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case KTR_SYSCALL:
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type = "CALL";
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break;
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case KTR_SYSRET:
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type = "RET ";
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break;
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case KTR_NAMEI:
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type = "NAMI";
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break;
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case KTR_GENIO:
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type = "GIO ";
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break;
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case KTR_PSIG:
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type = "PSIG";
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break;
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case KTR_CSW:
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type = "CSW";
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break;
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case KTR_USER:
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type = "USER";
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break;
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default:
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(void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
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type = unknown;
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}
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/*
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* The ktr_tid field was previously the ktr_buffer field, which held
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* the kernel pointer value for the buffer associated with data
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* following the record header. It now holds a threadid, but only
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* for trace files after the change. Older trace files still contain
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* kernel pointers. Detect this and suppress the results by printing
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* negative tid's as 0.
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*/
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if (threads)
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(void)printf("%6d %6d %-8.*s ", kth->ktr_pid, kth->ktr_tid >
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0 ? kth->ktr_tid : 0, MAXCOMLEN, kth->ktr_comm);
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else
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(void)printf("%6d %-8.*s ", kth->ktr_pid, MAXCOMLEN,
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kth->ktr_comm);
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if (timestamp) {
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if (timestamp == 3) {
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if (prevtime.tv_sec == 0)
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prevtime = kth->ktr_time;
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timevalsub(&kth->ktr_time, &prevtime);
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}
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if (timestamp == 2) {
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temp = kth->ktr_time;
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timevalsub(&kth->ktr_time, &prevtime);
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prevtime = temp;
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}
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(void)printf("%ld.%06ld ",
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kth->ktr_time.tv_sec, kth->ktr_time.tv_usec);
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}
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(void)printf("%s ", type);
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}
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#include <sys/syscall.h>
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#define KTRACE
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#include <sys/kern/syscalls.c>
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#undef KTRACE
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int nsyscalls = sizeof (syscallnames) / sizeof (syscallnames[0]);
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static const char *ptrace_ops[] = {
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"PT_TRACE_ME", "PT_READ_I", "PT_READ_D", "PT_READ_U",
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"PT_WRITE_I", "PT_WRITE_D", "PT_WRITE_U", "PT_CONTINUE",
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"PT_KILL", "PT_STEP", "PT_ATTACH", "PT_DETACH",
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};
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void
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ktrsyscall(struct ktr_syscall *ktr)
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{
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int narg = ktr->ktr_narg;
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register_t *ip;
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if (ktr->ktr_code >= nsyscalls || ktr->ktr_code < 0)
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(void)printf("[%d]", ktr->ktr_code);
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else
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(void)printf("%s", syscallnames[ktr->ktr_code]);
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ip = &ktr->ktr_args[0];
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if (narg) {
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char c = '(';
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if (fancy) {
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if (ktr->ktr_code == SYS_ioctl) {
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const char *cp;
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if (decimal)
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(void)printf("(%ld", (long)*ip);
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else
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(void)printf("(%#lx", (long)*ip);
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ip++;
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narg--;
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if ((cp = ioctlname(*ip)) != NULL)
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(void)printf(",%s", cp);
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else {
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if (decimal)
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(void)printf(",%ld", (long)*ip);
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else
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(void)printf(",%#lx ", (long)*ip);
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}
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c = ',';
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ip++;
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narg--;
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} else if (ktr->ktr_code == SYS_ptrace) {
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if ((size_t)*ip < sizeof(ptrace_ops) /
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sizeof(ptrace_ops[0]) && *ip >= 0)
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(void)printf("(%s", ptrace_ops[*ip]);
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#ifdef PT_GETREGS
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else if (*ip == PT_GETREGS)
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(void)printf("(%s", "PT_GETREGS");
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#endif
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#ifdef PT_SETREGS
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else if (*ip == PT_SETREGS)
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(void)printf("(%s", "PT_SETREGS");
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#endif
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#ifdef PT_GETFPREGS
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else if (*ip == PT_GETFPREGS)
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(void)printf("(%s", "PT_GETFPREGS");
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#endif
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#ifdef PT_SETFPREGS
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else if (*ip == PT_SETFPREGS)
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(void)printf("(%s", "PT_SETFPREGS");
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#endif
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#ifdef PT_GETDBREGS
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else if (*ip == PT_GETDBREGS)
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(void)printf("(%s", "PT_GETDBREGS");
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#endif
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#ifdef PT_SETDBREGS
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else if (*ip == PT_SETDBREGS)
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(void)printf("(%s", "PT_SETDBREGS");
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#endif
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else
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(void)printf("(%ld", (long)*ip);
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c = ',';
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ip++;
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narg--;
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}
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}
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while (narg) {
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if (decimal)
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(void)printf("%c%ld", c, (long)*ip);
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else
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(void)printf("%c%#lx", c, (long)*ip);
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c = ',';
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ip++;
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narg--;
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}
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(void)putchar(')');
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}
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(void)putchar('\n');
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}
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void
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ktrsysret(struct ktr_sysret *ktr)
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{
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register_t ret = ktr->ktr_retval;
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int error = ktr->ktr_error;
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int code = ktr->ktr_code;
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if (code >= nsyscalls || code < 0)
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(void)printf("[%d] ", code);
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else
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(void)printf("%s ", syscallnames[code]);
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if (error == 0) {
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if (fancy) {
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(void)printf("%d", ret);
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if (ret < 0 || ret > 9)
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(void)printf("/%#lx", (long)ret);
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} else {
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if (decimal)
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(void)printf("%ld", (long)ret);
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else
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(void)printf("%#lx", (long)ret);
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}
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} else if (error == ERESTART)
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(void)printf("RESTART");
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else if (error == EJUSTRETURN)
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(void)printf("JUSTRETURN");
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else {
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(void)printf("-1 errno %d", ktr->ktr_error);
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if (fancy)
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(void)printf(" %s", strerror(ktr->ktr_error));
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}
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(void)putchar('\n');
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}
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void
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ktrnamei(char *cp, int len)
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{
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(void)printf("\"%.*s\"\n", len, cp);
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}
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void
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hexdump(char *p, int len, int screenwidth)
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{
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int n, i;
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int width;
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width = 0;
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do {
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width += 2;
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i = 13; /* base offset */
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i += (width / 2) + 1; /* spaces every second byte */
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i += (width * 2); /* width of bytes */
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i += 3; /* " |" */
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i += width; /* each byte */
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i += 1; /* "|" */
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} while (i < screenwidth);
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width -= 2;
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for (n = 0; n < len; n += width) {
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for (i = n; i < n + width; i++) {
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if ((i % width) == 0) { /* beginning of line */
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printf(" 0x%04x", i);
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}
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if ((i % 2) == 0) {
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printf(" ");
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}
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if (i < len)
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printf("%02x", p[i] & 0xff);
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else
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printf(" ");
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}
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printf(" |");
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for (i = n; i < n + width; i++) {
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if (i >= len)
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break;
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if (p[i] >= ' ' && p[i] <= '~')
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printf("%c", p[i]);
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else
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printf(".");
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}
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printf("|\n");
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}
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if ((i % width) != 0)
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printf("\n");
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}
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void
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visdump(char *dp, int datalen, int screenwidth)
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{
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int col = 0;
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char *cp;
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int width;
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char visbuf[5];
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(void)printf(" \"");
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col = 8;
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for (;datalen > 0; datalen--, dp++) {
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(void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
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cp = visbuf;
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/*
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* Keep track of printables and
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* space chars (like fold(1)).
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*/
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if (col == 0) {
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(void)putchar('\t');
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col = 8;
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}
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switch(*cp) {
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case '\n':
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col = 0;
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(void)putchar('\n');
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continue;
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case '\t':
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width = 8 - (col&07);
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break;
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default:
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width = strlen(cp);
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}
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if (col + width > (screenwidth-2)) {
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(void)printf("\\\n\t");
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col = 8;
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}
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col += width;
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do {
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(void)putchar(*cp++);
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} while (*cp);
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}
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if (col == 0)
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(void)printf(" ");
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(void)printf("\"\n");
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}
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void
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ktrgenio(struct ktr_genio *ktr, int len)
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{
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int datalen = len - sizeof (struct ktr_genio);
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char *dp = (char *)ktr + sizeof (struct ktr_genio);
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static int screenwidth = 0;
|
|
int i, binary;
|
|
|
|
if (screenwidth == 0) {
|
|
struct winsize ws;
|
|
|
|
if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
|
|
ws.ws_col > 8)
|
|
screenwidth = ws.ws_col;
|
|
else
|
|
screenwidth = 80;
|
|
}
|
|
printf("fd %d %s %d byte%s\n", ktr->ktr_fd,
|
|
ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen,
|
|
datalen == 1 ? "" : "s");
|
|
if (suppressdata)
|
|
return;
|
|
if (maxdata && datalen > maxdata)
|
|
datalen = maxdata;
|
|
|
|
for (i = 0, binary = 0; i < datalen && binary == 0; i++) {
|
|
if (dp[i] >= 32 && dp[i] < 127)
|
|
continue;
|
|
if (dp[i] == 10 || dp[i] == 13 || dp[i] == 0 || dp[i] == 9)
|
|
continue;
|
|
binary = 1;
|
|
}
|
|
if (binary)
|
|
hexdump(dp, datalen, screenwidth);
|
|
else
|
|
visdump(dp, datalen, screenwidth);
|
|
}
|
|
|
|
const char *signames[] = {
|
|
"NULL", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT", /* 1 - 6 */
|
|
"EMT", "FPE", "KILL", "BUS", "SEGV", "SYS", /* 7 - 12 */
|
|
"PIPE", "ALRM", "TERM", "URG", "STOP", "TSTP", /* 13 - 18 */
|
|
"CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU", /* 19 - 24 */
|
|
"XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1", /* 25 - 30 */
|
|
"USR2", NULL, /* 31 - 32 */
|
|
};
|
|
|
|
void
|
|
ktrpsig(struct ktr_psig *psig)
|
|
{
|
|
(void)printf("SIG%s ", signames[psig->signo]);
|
|
if (psig->action == SIG_DFL)
|
|
(void)printf("SIG_DFL\n");
|
|
else {
|
|
(void)printf("caught handler=0x%lx mask=0x%x code=0x%x\n",
|
|
(u_long)psig->action, psig->mask.__bits[0], psig->code);
|
|
}
|
|
}
|
|
|
|
void
|
|
ktrcsw(struct ktr_csw *cs)
|
|
{
|
|
(void)printf("%s %s\n", cs->out ? "stop" : "resume",
|
|
cs->user ? "user" : "kernel");
|
|
}
|
|
|
|
void
|
|
ktruser(int len, unsigned char *p)
|
|
{
|
|
(void)printf("%d ", len);
|
|
while (len--)
|
|
if (decimal)
|
|
(void)printf(" %d", *p++);
|
|
else
|
|
(void)printf(" %02x", *p++);
|
|
(void)printf("\n");
|
|
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: kdump [-dEnlHRsT] [-f trfile] [-m maxdata] [-p pid] [-t [cnisuw]]\n");
|
|
exit(1);
|
|
}
|