2 * Copyright (c) 2002 Jake Burkholder
3 * Copyright (c) 2004 Robert Watson
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/types.h>
49 "usage: ktrdump [-cfqrtH] [-e execfile] [-i ktrfile] [-m corefile] [-o outfile]\n"
51 static void usage(void);
53 static struct nlist nl[] = {
71 static char corefile[PATH_MAX];
72 static char execfile[PATH_MAX];
74 static char desc[SBUFLEN];
75 static char errbuf[_POSIX2_LINE_MAX];
76 static char fbuf[PATH_MAX];
77 static char obuf[PATH_MAX];
78 static char sbuf[KTR_PARMS][SBUFLEN];
81 * Reads the ktr trace buffer from kernel memory and prints the trace entries.
84 main(int ac, char **av)
86 u_long parms[KTR_PARMS];
87 struct ktr_entry *buf;
88 uintmax_t tlast, tnow;
102 * Parse commandline arguments.
105 while ((c = getopt(ac, av, "cfqrtHe:i:m:o:")) != -1)
111 if (strlcpy(execfile, optarg, sizeof(execfile))
113 errx(1, "%s: File name too long", optarg);
121 if ((in = open(optarg, O_RDONLY)) == -1)
122 err(1, "%s", optarg);
125 if (strlcpy(corefile, optarg, sizeof(corefile))
127 errx(1, "%s: File name too long", optarg);
131 if ((out = fopen(optarg, "w")) == NULL)
132 err(1, "%s", optarg);
156 * Open our execfile and corefile, resolve needed symbols and read in
159 if ((kd = kvm_openfiles(eflag ? execfile : NULL,
160 mflag ? corefile : NULL, NULL, O_RDONLY, errbuf)) == NULL)
161 errx(1, "%s", errbuf);
162 if (kvm_nlist(kd, nl) != 0 ||
163 kvm_read(kd, nl[0].n_value, &version, sizeof(version)) == -1)
164 errx(1, "%s", kvm_geterr(kd));
165 if (version != KTR_VERSION)
166 errx(1, "ktr version mismatch");
168 if (fstat(in, &sb) == -1)
170 entries = sb.st_size / sizeof(*buf);
172 buf = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, in, 0);
173 if (buf == MAP_FAILED)
176 if (kvm_read(kd, nl[1].n_value, &entries, sizeof(entries))
178 errx(1, "%s", kvm_geterr(kd));
179 if ((buf = malloc(sizeof(*buf) * entries)) == NULL)
181 if (kvm_read(kd, nl[2].n_value, &index, sizeof(index)) == -1 ||
182 kvm_read(kd, nl[3].n_value, buf, sizeof(*buf) * entries)
184 errx(1, "%s", kvm_geterr(kd));
188 * Print a nice header.
191 fprintf(out, "%-6s ", "index");
193 fprintf(out, "%-3s ", "cpu");
195 fprintf(out, "%-16s ", "timestamp");
197 fprintf(out, "%-40s ", "file and line");
199 fprintf(out, "%-18s ", "tid");
200 fprintf(out, "%s", "trace");
203 fprintf(out, "------ ");
205 fprintf(out, "--- ");
207 fprintf(out, "---------------- ");
210 "---------------------------------------- ");
212 fprintf(out, "------------------ ");
213 fprintf(out, "----- ");
218 * Now tear through the trace buffer.
221 i = (index - 1) & (entries - 1);
224 if (buf[i].ktr_desc == NULL)
226 if (kvm_read(kd, (u_long)buf[i].ktr_desc, desc,
228 errx(1, "%s", kvm_geterr(kd));
229 desc[sizeof(desc) - 1] = '\0';
231 for (p = desc; (c = *p++) != '\0';) {
234 next: if ((c = *p++) == '\0')
236 if (parm == KTR_PARMS)
237 errx(1, "too many parameters");
239 case '0': case '1': case '2': case '3': case '4':
240 case '5': case '6': case '7': case '8': case '9':
241 case '#': case '-': case ' ': case '+': case '\'':
242 case 'h': case 'l': case 'j': case 't': case 'z':
243 case 'q': case 'L': case '.':
246 if (kvm_read(kd, (u_long)buf[i].ktr_parms[parm],
247 sbuf[parm], sizeof(sbuf[parm])) == -1)
248 strcpy(sbuf[parm], "(null)");
249 sbuf[parm][sizeof(sbuf[0]) - 1] = '\0';
250 parms[parm] = (u_long)sbuf[parm];
254 parms[parm] = buf[i].ktr_parms[parm];
259 fprintf(out, "%6d ", i);
261 fprintf(out, "%3d ", buf[i].ktr_cpu);
263 tnow = (uintmax_t)buf[i].ktr_timestamp;
267 fprintf(out, "%16ju ", !iflag ? tlast - tnow :
271 fprintf(out, "%16ju ", tnow);
274 if (kvm_read(kd, (u_long)buf[i].ktr_file, fbuf,
276 strcpy(fbuf, "(null)");
277 snprintf(obuf, sizeof(obuf), "%s:%d", fbuf,
279 fprintf(out, "%-40s ", obuf);
282 fprintf(out, "%p ", buf[i].ktr_thread);
283 fprintf(out, desc, parms[0], parms[1], parms[2], parms[3],
289 i = (i - 1) & (entries - 1);
303 fprintf(stderr, USAGE);