ee574da534
case. It seems entries are in reverse order when read from the kernel memory but in the right order when read from a file (i.e. ALQ). Handle both cases. MFC after: 1 day
293 lines
6.8 KiB
C
293 lines
6.8 KiB
C
/*-
|
|
* Copyright (c) 2002 Jake Burkholder
|
|
* Copyright (c) 2004 Robert Watson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <kvm.h>
|
|
#include <limits.h>
|
|
#include <nlist.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#define SBUFLEN 128
|
|
#define USAGE \
|
|
"usage: ktrdump [-cfqrt] [-e execfile] [-i ktrfile] [-m corefile] [-o outfile]\n"
|
|
|
|
extern char *optarg;
|
|
extern int optind;
|
|
|
|
static void usage(void);
|
|
|
|
static struct nlist nl[] = {
|
|
{ "_ktr_version" },
|
|
{ "_ktr_entries" },
|
|
{ "_ktr_idx" },
|
|
{ "_ktr_buf" },
|
|
{ NULL }
|
|
};
|
|
|
|
static int cflag;
|
|
static int eflag;
|
|
static int fflag;
|
|
static int mflag;
|
|
static int qflag;
|
|
static int rflag;
|
|
static int tflag;
|
|
static int iflag;
|
|
|
|
static char corefile[PATH_MAX];
|
|
static char execfile[PATH_MAX];
|
|
|
|
static char desc[SBUFLEN];
|
|
static char errbuf[_POSIX2_LINE_MAX];
|
|
static char fbuf[PATH_MAX];
|
|
static char obuf[PATH_MAX];
|
|
static char sbuf[KTR_PARMS][SBUFLEN];
|
|
|
|
/*
|
|
* Reads the ktr trace buffer from kernel memory and prints the trace entries.
|
|
*/
|
|
int
|
|
main(int ac, char **av)
|
|
{
|
|
u_long parms[KTR_PARMS];
|
|
struct ktr_entry *buf;
|
|
uintmax_t tlast, tnow;
|
|
struct stat sb;
|
|
kvm_t *kd;
|
|
FILE *out;
|
|
char *p;
|
|
int version;
|
|
int entries;
|
|
int index;
|
|
int parm;
|
|
int in;
|
|
int c;
|
|
int i = 0;
|
|
|
|
/*
|
|
* Parse commandline arguments.
|
|
*/
|
|
out = stdout;
|
|
while ((c = getopt(ac, av, "cfqrte:i:m:o:")) != -1)
|
|
switch (c) {
|
|
case 'c':
|
|
cflag = 1;
|
|
break;
|
|
case 'e':
|
|
if (strlcpy(execfile, optarg, sizeof(execfile))
|
|
>= sizeof(execfile))
|
|
errx(1, "%s: File name too long", optarg);
|
|
eflag = 1;
|
|
break;
|
|
case 'f':
|
|
fflag = 1;
|
|
break;
|
|
case 'i':
|
|
iflag = 1;
|
|
if ((in = open(optarg, O_RDONLY)) == -1)
|
|
err(1, "%s", optarg);
|
|
break;
|
|
case 'm':
|
|
if (strlcpy(corefile, optarg, sizeof(corefile))
|
|
>= sizeof(corefile))
|
|
errx(1, "%s: File name too long", optarg);
|
|
mflag = 1;
|
|
break;
|
|
case 'o':
|
|
if ((out = fopen(optarg, "w")) == NULL)
|
|
err(1, "%s", optarg);
|
|
break;
|
|
case 'q':
|
|
qflag++;
|
|
break;
|
|
case 'r':
|
|
rflag = 1;
|
|
break;
|
|
case 't':
|
|
tflag = 1;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
ac -= optind;
|
|
av += optind;
|
|
if (ac != 0)
|
|
usage();
|
|
|
|
/*
|
|
* Open our execfile and corefile, resolve needed symbols and read in
|
|
* the trace buffer.
|
|
*/
|
|
if ((kd = kvm_openfiles(eflag ? execfile : NULL,
|
|
mflag ? corefile : NULL, NULL, O_RDONLY, errbuf)) == NULL)
|
|
errx(1, "%s", errbuf);
|
|
if (kvm_nlist(kd, nl) != 0 ||
|
|
kvm_read(kd, nl[0].n_value, &version, sizeof(version)) == -1)
|
|
errx(1, "%s", kvm_geterr(kd));
|
|
if (version != KTR_VERSION)
|
|
errx(1, "ktr version mismatch");
|
|
if (iflag) {
|
|
if (fstat(in, &sb) == -1)
|
|
errx(1, "stat");
|
|
entries = sb.st_size / sizeof(*buf);
|
|
index = 0;
|
|
buf = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, in, 0);
|
|
if (buf == MAP_FAILED)
|
|
errx(1, "mmap");
|
|
} else {
|
|
if (kvm_read(kd, nl[1].n_value, &entries, sizeof(entries))
|
|
== -1)
|
|
errx(1, "%s", kvm_geterr(kd));
|
|
if ((buf = malloc(sizeof(*buf) * entries)) == NULL)
|
|
err(1, NULL);
|
|
if (kvm_read(kd, nl[2].n_value, &index, sizeof(index)) == -1 ||
|
|
kvm_read(kd, nl[3].n_value, buf, sizeof(*buf) * entries)
|
|
== -1)
|
|
errx(1, "%s", kvm_geterr(kd));
|
|
}
|
|
|
|
/*
|
|
* Print a nice header.
|
|
*/
|
|
if (!qflag) {
|
|
fprintf(out, "%-6s ", "index");
|
|
if (cflag)
|
|
fprintf(out, "%-3s ", "cpu");
|
|
if (tflag)
|
|
fprintf(out, "%-16s ", "timestamp");
|
|
if (fflag)
|
|
fprintf(out, "%-40s ", "file and line");
|
|
fprintf(out, "%s", "trace");
|
|
fprintf(out, "\n");
|
|
|
|
fprintf(out, "------ ");
|
|
if (cflag)
|
|
fprintf(out, "--- ");
|
|
if (tflag)
|
|
fprintf(out, "---------------- ");
|
|
if (fflag)
|
|
fprintf(out,
|
|
"---------------------------------------- ");
|
|
fprintf(out, "----- ");
|
|
fprintf(out, "\n");
|
|
}
|
|
|
|
/*
|
|
* Now tear through the trace buffer.
|
|
*/
|
|
if (!iflag)
|
|
i = (index - 1) & (entries - 1);
|
|
tlast = -1;
|
|
for (;;) {
|
|
if (buf[i].ktr_desc == NULL)
|
|
break;
|
|
if (kvm_read(kd, (u_long)buf[i].ktr_desc, desc,
|
|
sizeof(desc)) == -1)
|
|
errx(1, "%s", kvm_geterr(kd));
|
|
desc[sizeof(desc) - 1] = '\0';
|
|
parm = 0;
|
|
for (p = desc; (c = *p++) != '\0';) {
|
|
if (c != '%')
|
|
continue;
|
|
if ((c = *p++) == '\0')
|
|
break;
|
|
if (parm == KTR_PARMS)
|
|
errx(1, "too many parameters");
|
|
switch (c) {
|
|
case 's':
|
|
if (kvm_read(kd, (u_long)buf[i].ktr_parms[parm],
|
|
sbuf[parm], sizeof(sbuf[parm])) == -1)
|
|
strcpy(sbuf[parm], "(null)");
|
|
sbuf[parm][sizeof(sbuf[0]) - 1] = '\0';
|
|
parms[parm] = (u_long)sbuf[parm];
|
|
parm++;
|
|
break;
|
|
default:
|
|
parms[parm] = buf[i].ktr_parms[parm];
|
|
parm++;
|
|
break;
|
|
}
|
|
}
|
|
fprintf(out, "%6d ", i);
|
|
if (cflag)
|
|
fprintf(out, "%3d ", buf[i].ktr_cpu);
|
|
if (tflag) {
|
|
tnow = (uintmax_t)buf[i].ktr_timestamp;
|
|
if (rflag) {
|
|
if (tlast == -1)
|
|
tlast = tnow;
|
|
fprintf(out, "%16ju ", !iflag ? tlast - tnow :
|
|
tnow - tlast);
|
|
tlast = tnow;
|
|
} else
|
|
fprintf(out, "%16ju ", tnow);
|
|
}
|
|
if (fflag) {
|
|
if (kvm_read(kd, (u_long)buf[i].ktr_file, fbuf,
|
|
sizeof(fbuf)) == -1)
|
|
strcpy(fbuf, "(null)");
|
|
snprintf(obuf, sizeof(obuf), "%s:%d", fbuf,
|
|
buf[i].ktr_line);
|
|
fprintf(out, "%-40s ", obuf);
|
|
}
|
|
fprintf(out, desc, parms[0], parms[1], parms[2], parms[3],
|
|
parms[4], parms[5]);
|
|
fprintf(out, "\n");
|
|
if (!iflag) {
|
|
if (i == index)
|
|
break;
|
|
i = (i - 1) & (entries - 1);
|
|
} else {
|
|
if (++i == entries)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, USAGE);
|
|
exit(1);
|
|
}
|