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 #define KERNEL 45 extern int errno; 46 #include <sys/errno.h> 47 #undef KERNEL 48 #include <sys/param.h> 49 #include <sys/errno.h> 50 #include <sys/time.h> 51 #include <sys/uio.h> 52 #include <sys/ktrace.h> 53 #include <sys/ioctl.h> 54 #include <sys/ptrace.h> 55 #include <vis.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include "ktrace.h" 60 61 int timestamp, decimal, fancy = 1, tail, maxdata; 62 char *tracefile = DEF_TRACEFILE; 63 struct ktr_header ktr_header; 64 65 #define eqs(s1, s2) (strcmp((s1), (s2)) == 0) 66 67 main(argc, argv) 68 int argc; 69 char *argv[]; 70 { 71 extern int optind; 72 extern char *optarg; 73 int ch, ktrlen, size; 74 register void *m; 75 int trpoints = ALL_POINTS; 76 77 while ((ch = getopt(argc,argv,"f:dlm:nRTt:")) != EOF) 78 switch((char)ch) { 79 case 'f': 80 tracefile = optarg; 81 break; 82 case 'd': 83 decimal = 1; 84 break; 85 case 'l': 86 tail = 1; 87 break; 88 case 'm': 89 maxdata = atoi(optarg); 90 break; 91 case 'n': 92 fancy = 0; 93 break; 94 case 'R': 95 timestamp = 2; /* relative timestamp */ 96 break; 97 case 'T': 98 timestamp = 1; 99 break; 100 case 't': 101 trpoints = getpoints(optarg); 102 if (trpoints < 0) { 103 (void)fprintf(stderr, 104 "kdump: unknown trace point in %s\n", 105 optarg); 106 exit(1); 107 } 108 break; 109 default: 110 usage(); 111 } 112 argv += optind; 113 argc -= optind; 114 115 if (argc > 1) 116 usage(); 117 118 m = (void *)malloc(size = 1025); 119 if (m == NULL) { 120 (void)fprintf(stderr, "kdump: %s.\n", strerror(ENOMEM)); 121 exit(1); 122 } 123 if (!freopen(tracefile, "r", stdin)) { 124 (void)fprintf(stderr, 125 "kdump: %s: %s.\n", tracefile, strerror(errno)); 126 exit(1); 127 } 128 while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) { 129 if (trpoints & (1<<ktr_header.ktr_type)) 130 dumpheader(&ktr_header); 131 if ((ktrlen = ktr_header.ktr_len) < 0) { 132 (void)fprintf(stderr, 133 "kdump: bogus length 0x%x\n", ktrlen); 134 exit(1); 135 } 136 if (ktrlen > size) { 137 m = (void *)realloc(m, ktrlen+1); 138 if (m == NULL) { 139 (void)fprintf(stderr, 140 "kdump: %s.\n", strerror(ENOMEM)); 141 exit(1); 142 } 143 size = ktrlen; 144 } 145 if (ktrlen && fread_tail(m, ktrlen, 1) == 0) { 146 (void)fprintf(stderr, "kdump: data too short.\n"); 147 exit(1); 148 } 149 if ((trpoints & (1<<ktr_header.ktr_type)) == 0) 150 continue; 151 switch (ktr_header.ktr_type) { 152 case KTR_SYSCALL: 153 ktrsyscall((struct ktr_syscall *)m); 154 break; 155 case KTR_SYSRET: 156 ktrsysret((struct ktr_sysret *)m); 157 break; 158 case KTR_NAMEI: 159 ktrnamei(m, ktrlen); 160 break; 161 case KTR_GENIO: 162 ktrgenio((struct ktr_genio *)m, ktrlen); 163 break; 164 case KTR_PSIG: 165 ktrpsig((struct ktr_psig *)m); 166 break; 167 case KTR_CSW: 168 ktrcsw((struct ktr_csw *)m); 169 break; 170 } 171 if (tail) 172 (void)fflush(stdout); 173 } 174 } 175 176 fread_tail(buf, size, num) 177 char *buf; 178 int num, size; 179 { 180 int i; 181 182 while ((i = fread(buf, size, num, stdin)) == 0 && tail) { 183 (void)sleep(1); 184 clearerr(stdin); 185 } 186 return (i); 187 } 188 189 dumpheader(kth) 190 struct ktr_header *kth; 191 { 192 static char unknown[64]; 193 static struct timeval prevtime, temp; 194 char *type; 195 196 switch (kth->ktr_type) { 197 case KTR_SYSCALL: 198 type = "CALL"; 199 break; 200 case KTR_SYSRET: 201 type = "RET "; 202 break; 203 case KTR_NAMEI: 204 type = "NAMI"; 205 break; 206 case KTR_GENIO: 207 type = "GIO "; 208 break; 209 case KTR_PSIG: 210 type = "PSIG"; 211 break; 212 case KTR_CSW: 213 type = "CSW"; 214 break; 215 default: 216 (void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type); 217 type = unknown; 218 } 219 220 (void)printf("%6d %-8s ", kth->ktr_pid, kth->ktr_comm); 221 if (timestamp) { 222 if (timestamp == 2) { 223 temp = kth->ktr_time; 224 timevalsub(&kth->ktr_time, &prevtime); 225 prevtime = temp; 226 } 227 (void)printf("%ld.%06ld ", 228 kth->ktr_time.tv_sec, kth->ktr_time.tv_usec); 229 } 230 (void)printf("%s ", type); 231 } 232 233 #include <sys/syscall.h> 234 #define KTRACE 235 #include <sys/kern/syscalls.c> 236 #undef KTRACE 237 int nsyscalls = sizeof (syscallnames) / sizeof (syscallnames[0]); 238 239 static char *ptrace_ops[] = { 240 "PT_TRACE_ME", "PT_READ_I", "PT_READ_D", "PT_READ_U", 241 "PT_WRITE_I", "PT_WRITE_D", "PT_WRITE_U", "PT_CONTINUE", 242 "PT_KILL", "PT_STEP", 243 }; 244 245 ktrsyscall(ktr) 246 register struct ktr_syscall *ktr; 247 { 248 register narg = ktr->ktr_narg; 249 register int *ip; 250 char *ioctlname(); 251 252 if (ktr->ktr_code >= nsyscalls || ktr->ktr_code < 0) 253 (void)printf("[%d]", ktr->ktr_code); 254 else 255 (void)printf("%s", syscallnames[ktr->ktr_code]); 256 ip = (int *)((char *)ktr + sizeof(struct ktr_syscall)); 257 if (narg) { 258 char c = '('; 259 if (fancy) { 260 if (ktr->ktr_code == SYS_ioctl) { 261 char *cp; 262 if (decimal) 263 (void)printf("(%d", *ip); 264 else 265 (void)printf("(%#x", *ip); 266 ip++; 267 narg--; 268 if ((cp = ioctlname(*ip)) != NULL) 269 (void)printf(",%s", cp); 270 else { 271 if (decimal) 272 (void)printf(",%d", *ip); 273 else 274 (void)printf(",%#x ", *ip); 275 } 276 c = ','; 277 ip++; 278 narg--; 279 } else if (ktr->ktr_code == SYS_ptrace) { 280 if (*ip <= PT_STEP && *ip >= 0) 281 (void)printf("(%s", ptrace_ops[*ip]); 282 else 283 (void)printf("(%d", *ip); 284 c = ','; 285 ip++; 286 narg--; 287 } 288 } 289 while (narg) { 290 if (decimal) 291 (void)printf("%c%d", c, *ip); 292 else 293 (void)printf("%c%#x", c, *ip); 294 c = ','; 295 ip++; 296 narg--; 297 } 298 (void)putchar(')'); 299 } 300 (void)putchar('\n'); 301 } 302 303 ktrsysret(ktr) 304 struct ktr_sysret *ktr; 305 { 306 register int ret = ktr->ktr_retval; 307 register int error = ktr->ktr_error; 308 register int code = ktr->ktr_code; 309 310 if (code >= nsyscalls || code < 0) 311 (void)printf("[%d] ", code); 312 else 313 (void)printf("%s ", syscallnames[code]); 314 315 if (error == 0) { 316 if (fancy) { 317 (void)printf("%d", ret); 318 if (ret < 0 || ret > 9) 319 (void)printf("/%#x", ret); 320 } else { 321 if (decimal) 322 (void)printf("%d", ret); 323 else 324 (void)printf("%#x", ret); 325 } 326 } else if (error == ERESTART) 327 (void)printf("RESTART"); 328 else if (error == EJUSTRETURN) 329 (void)printf("JUSTRETURN"); 330 else { 331 (void)printf("-1 errno %d", ktr->ktr_error); 332 if (fancy) 333 (void)printf(" %s", strerror(ktr->ktr_error)); 334 } 335 (void)putchar('\n'); 336 } 337 338 ktrnamei(cp, len) 339 char *cp; 340 { 341 (void)printf("\"%.*s\"\n", len, cp); 342 } 343 344 ktrgenio(ktr, len) 345 struct ktr_genio *ktr; 346 { 347 register int datalen = len - sizeof (struct ktr_genio); 348 register char *dp = (char *)ktr + sizeof (struct ktr_genio); 349 register char *cp; 350 register int col = 0; 351 register width; 352 char visbuf[5]; 353 static screenwidth = 0; 354 355 if (screenwidth == 0) { 356 struct winsize ws; 357 358 if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 && 359 ws.ws_col > 8) 360 screenwidth = ws.ws_col; 361 else 362 screenwidth = 80; 363 } 364 printf("fd %d %s %d bytes\n", ktr->ktr_fd, 365 ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen); 366 if (maxdata && datalen > maxdata) 367 datalen = maxdata; 368 (void)printf(" \""); 369 col = 8; 370 for (;datalen > 0; datalen--, dp++) { 371 (void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1)); 372 cp = visbuf; 373 /* 374 * Keep track of printables and 375 * space chars (like fold(1)). 376 */ 377 if (col == 0) { 378 (void)putchar('\t'); 379 col = 8; 380 } 381 switch(*cp) { 382 case '\n': 383 col = 0; 384 (void)putchar('\n'); 385 continue; 386 case '\t': 387 width = 8 - (col&07); 388 break; 389 default: 390 width = strlen(cp); 391 } 392 if (col + width > (screenwidth-2)) { 393 (void)printf("\\\n\t"); 394 col = 8; 395 } 396 col += width; 397 do { 398 (void)putchar(*cp++); 399 } while (*cp); 400 } 401 if (col == 0) 402 (void)printf(" "); 403 (void)printf("\"\n"); 404 } 405 406 char *signames[] = { 407 "NULL", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT", /* 1 - 6 */ 408 "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS", /* 7 - 12 */ 409 "PIPE", "ALRM", "TERM", "URG", "STOP", "TSTP", /* 13 - 18 */ 410 "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU", /* 19 - 24 */ 411 "XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1", /* 25 - 30 */ 412 "USR2", NULL, /* 31 - 32 */ 413 }; 414 415 ktrpsig(psig) 416 struct ktr_psig *psig; 417 { 418 (void)printf("SIG%s ", signames[psig->signo]); 419 if (psig->action == SIG_DFL) 420 (void)printf("SIG_DFL\n"); 421 else 422 (void)printf("caught handler=0x%x mask=0x%x code=0x%x\n", 423 (u_int)psig->action, psig->mask, psig->code); 424 } 425 426 ktrcsw(cs) 427 struct ktr_csw *cs; 428 { 429 (void)printf("%s %s\n", cs->out ? "stop" : "resume", 430 cs->user ? "user" : "kernel"); 431 } 432 433 usage() 434 { 435 (void)fprintf(stderr, 436 "usage: kdump [-dnlRT] [-f trfile] [-m maxdata] [-t [cnis]]\n"); 437 exit(1); 438 } 439