/*- * Copyright (c) 2002 Jake Burkholder * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define SBUFLEN 128 #define USAGE \ "usage: ktrdump [-c] [-f] [-t] [-e execfile] [-i ktrfile ] [-m corefile] [-o outfile]" 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 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; struct stat sb; kvm_t *kd; FILE *out; char *p; int version; int entries; int index; int parm; int in; int c; int i; /* * Parse commandline arguments. */ out = stdout; while ((c = getopt(ac, av, "cfte: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 '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. */ 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); 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) fprintf(out, "%16ju ", (uintmax_t)buf[i].ktr_timestamp); 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) { errx(1, USAGE); }