kgmon.c revision 1.4
1 /* 2 * Copyright (c) 1983, 1992, 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) 1983, 1992, 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[] = "@(#)kgmon.c 8.1 (Berkeley) 6/6/93"; */ 42 static char rcsid[] = "$Id"; 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/file.h> 47 #include <sys/sysctl.h> 48 #include <sys/gmon.h> 49 #include <errno.h> 50 #include <kvm.h> 51 #include <limits.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <nlist.h> 56 #include <ctype.h> 57 #include <paths.h> 58 59 struct nlist nl[] = { 60 #define N_GMONPARAM 0 61 { "__gmonparam" }, 62 #define N_PROFHZ 1 63 { "_profhz" }, 64 0, 65 }; 66 67 struct kvmvars { 68 kvm_t *kd; 69 struct gmonparam gpm; 70 }; 71 72 int bflag, hflag, kflag, rflag, pflag; 73 int debug = 0; 74 void setprof __P((struct kvmvars *kvp, int state)); 75 void dumpstate __P((struct kvmvars *kvp)); 76 void reset __P((struct kvmvars *kvp)); 77 78 int 79 main(int argc, char **argv) 80 { 81 extern char *optarg; 82 extern int optind; 83 int ch, mode, disp, accessmode; 84 struct kvmvars kvmvars; 85 char *system, *kmemf; 86 87 seteuid(getuid()); 88 kmemf = NULL; 89 system = NULL; 90 while ((ch = getopt(argc, argv, "M:N:bhpr")) != EOF) { 91 switch((char)ch) { 92 93 case 'M': 94 kmemf = optarg; 95 kflag = 1; 96 break; 97 98 case 'N': 99 system = optarg; 100 break; 101 102 case 'b': 103 bflag = 1; 104 break; 105 106 case 'h': 107 hflag = 1; 108 break; 109 110 case 'p': 111 pflag = 1; 112 break; 113 114 case 'r': 115 rflag = 1; 116 break; 117 118 default: 119 (void)fprintf(stderr, 120 "usage: kgmon [-bhrp] [-M core] [-N system]\n"); 121 exit(1); 122 } 123 } 124 argc -= optind; 125 argv += optind; 126 127 #define BACKWARD_COMPATIBILITY 128 #ifdef BACKWARD_COMPATIBILITY 129 if (*argv) { 130 system = *argv; 131 if (*++argv) { 132 kmemf = *argv; 133 ++kflag; 134 } 135 } 136 #endif 137 if (system == NULL) 138 system = _PATH_UNIX; 139 accessmode = openfiles(system, kmemf, &kvmvars); 140 mode = getprof(&kvmvars); 141 if (hflag) 142 disp = GMON_PROF_OFF; 143 else if (bflag) 144 disp = GMON_PROF_ON; 145 else 146 disp = mode; 147 if (pflag) 148 dumpstate(&kvmvars); 149 if (rflag) 150 reset(&kvmvars); 151 if (accessmode == O_RDWR) 152 setprof(&kvmvars, disp); 153 (void)fprintf(stdout, "kgmon: kernel profiling is %s.\n", 154 disp == GMON_PROF_OFF ? "off" : "running"); 155 return (0); 156 } 157 158 /* 159 * Check that profiling is enabled and open any ncessary files. 160 */ 161 openfiles(system, kmemf, kvp) 162 char *system; 163 char *kmemf; 164 struct kvmvars *kvp; 165 { 166 int mib[3], state, size, openmode; 167 char errbuf[_POSIX2_LINE_MAX]; 168 169 if (!kflag) { 170 mib[0] = CTL_KERN; 171 mib[1] = KERN_PROF; 172 mib[2] = GPROF_STATE; 173 size = sizeof state; 174 if (sysctl(mib, 3, &state, &size, NULL, 0) < 0) { 175 (void)fprintf(stderr, 176 "kgmon: profiling not defined in kernel.\n"); 177 exit(20); 178 } 179 if (!(bflag || hflag || rflag || 180 (pflag && state == GMON_PROF_ON))) 181 return (O_RDONLY); 182 (void)seteuid(0); 183 if (sysctl(mib, 3, NULL, NULL, &state, size) >= 0) 184 return (O_RDWR); 185 (void)seteuid(getuid()); 186 kern_readonly(state); 187 return (O_RDONLY); 188 } 189 openmode = (bflag || hflag || pflag || rflag) ? O_RDWR : O_RDONLY; 190 kvp->kd = kvm_openfiles(system, kmemf, NULL, openmode, errbuf); 191 if (kvp->kd == NULL) { 192 if (openmode == O_RDWR) { 193 openmode = O_RDONLY; 194 kvp->kd = kvm_openfiles(system, kmemf, NULL, O_RDONLY, 195 errbuf); 196 } 197 if (kvp->kd == NULL) { 198 (void)fprintf(stderr, "kgmon: kvm_openfiles: %s\n", 199 errbuf); 200 exit(2); 201 } 202 kern_readonly(GMON_PROF_ON); 203 } 204 if (kvm_nlist(kvp->kd, nl) < 0) { 205 (void)fprintf(stderr, "kgmon: %s: no namelist\n", system); 206 exit(3); 207 } 208 if (!nl[N_GMONPARAM].n_value) { 209 (void)fprintf(stderr, 210 "kgmon: profiling not defined in kernel.\n"); 211 exit(20); 212 } 213 return (openmode); 214 } 215 216 /* 217 * Suppress options that require a writable kernel. 218 */ 219 kern_readonly(mode) 220 int mode; 221 { 222 223 (void)fprintf(stderr, "kgmon: kernel read-only: "); 224 if (pflag && mode == GMON_PROF_ON) 225 (void)fprintf(stderr, "data may be inconsistent\n"); 226 if (rflag) 227 (void)fprintf(stderr, "-r supressed\n"); 228 if (bflag) 229 (void)fprintf(stderr, "-b supressed\n"); 230 if (hflag) 231 (void)fprintf(stderr, "-h supressed\n"); 232 rflag = bflag = hflag = 0; 233 } 234 235 /* 236 * Get the state of kernel profiling. 237 */ 238 getprof(kvp) 239 struct kvmvars *kvp; 240 { 241 int mib[3], size; 242 243 if (kflag) { 244 size = kvm_read(kvp->kd, nl[N_GMONPARAM].n_value, &kvp->gpm, 245 sizeof kvp->gpm); 246 } else { 247 mib[0] = CTL_KERN; 248 mib[1] = KERN_PROF; 249 mib[2] = GPROF_GMONPARAM; 250 size = sizeof kvp->gpm; 251 if (sysctl(mib, 3, &kvp->gpm, &size, NULL, 0) < 0) 252 size = 0; 253 } 254 if (size != sizeof kvp->gpm) { 255 (void)fprintf(stderr, "kgmon: cannot get gmonparam: %s\n", 256 kflag ? kvm_geterr(kvp->kd) : strerror(errno)); 257 exit (4); 258 } 259 return (kvp->gpm.state); 260 } 261 262 /* 263 * Enable or disable kernel profiling according to the state variable. 264 */ 265 void 266 setprof(kvp, state) 267 struct kvmvars *kvp; 268 int state; 269 { 270 struct gmonparam *p = (struct gmonparam *)nl[N_GMONPARAM].n_value; 271 int mib[3], sz, oldstate; 272 273 sz = sizeof(state); 274 if (!kflag) { 275 mib[0] = CTL_KERN; 276 mib[1] = KERN_PROF; 277 mib[2] = GPROF_STATE; 278 if (sysctl(mib, 3, &oldstate, &sz, NULL, 0) < 0) 279 goto bad; 280 if (oldstate == state) 281 return; 282 (void)seteuid(0); 283 if (sysctl(mib, 3, NULL, NULL, &state, sz) >= 0) { 284 (void)seteuid(getuid()); 285 return; 286 } 287 (void)seteuid(getuid()); 288 } else if (kvm_write(kvp->kd, (u_long)&p->state, (void *)&state, sz) 289 == sz) 290 return; 291 bad: 292 (void)fprintf(stderr, "kgmon: warning: cannot turn profiling %s\n", 293 state == GMON_PROF_OFF ? "off" : "on"); 294 } 295 296 /* 297 * Build the gmon.out file. 298 */ 299 void 300 dumpstate(kvp) 301 struct kvmvars *kvp; 302 { 303 register FILE *fp; 304 struct rawarc rawarc; 305 struct tostruct *tos; 306 u_long frompc, addr; 307 u_short *froms, *tickbuf; 308 int mib[3], i; 309 struct gmonhdr h; 310 int fromindex, endfrom, toindex; 311 312 setprof(kvp, GMON_PROF_OFF); 313 fp = fopen("gmon.out", "w"); 314 if (fp == 0) { 315 perror("gmon.out"); 316 return; 317 } 318 319 /* 320 * Build the gmon header and write it to a file. 321 */ 322 bzero(&h, sizeof(h)); 323 h.lpc = kvp->gpm.lowpc; 324 h.hpc = kvp->gpm.highpc; 325 h.ncnt = kvp->gpm.kcountsize + sizeof(h); 326 h.version = GMONVERSION; 327 h.profrate = getprofhz(kvp); 328 fwrite((char *)&h, sizeof(h), 1, fp); 329 330 /* 331 * Write out the tick buffer. 332 */ 333 mib[0] = CTL_KERN; 334 mib[1] = KERN_PROF; 335 if ((tickbuf = (u_short *)malloc(kvp->gpm.kcountsize)) == NULL) { 336 fprintf(stderr, "kgmon: cannot allocate kcount space\n"); 337 exit (5); 338 } 339 if (kflag) { 340 i = kvm_read(kvp->kd, (u_long)kvp->gpm.kcount, (void *)tickbuf, 341 kvp->gpm.kcountsize); 342 } else { 343 mib[2] = GPROF_COUNT; 344 i = kvp->gpm.kcountsize; 345 if (sysctl(mib, 3, tickbuf, &i, NULL, 0) < 0) 346 i = 0; 347 } 348 if (i != kvp->gpm.kcountsize) { 349 (void)fprintf(stderr, "kgmon: read ticks: read %u, got %d: %s", 350 kvp->gpm.kcountsize, i, 351 kflag ? kvm_geterr(kvp->kd) : strerror(errno)); 352 exit(6); 353 } 354 if ((fwrite(tickbuf, kvp->gpm.kcountsize, 1, fp)) != 1) { 355 perror("kgmon: writing tocks to gmon.out"); 356 exit(7); 357 } 358 free(tickbuf); 359 360 /* 361 * Write out the arc info. 362 */ 363 if ((froms = (u_short *)malloc(kvp->gpm.fromssize)) == NULL) { 364 fprintf(stderr, "kgmon: cannot allocate froms space\n"); 365 exit (8); 366 } 367 if (kflag) { 368 i = kvm_read(kvp->kd, (u_long)kvp->gpm.froms, (void *)froms, 369 kvp->gpm.fromssize); 370 } else { 371 mib[2] = GPROF_FROMS; 372 i = kvp->gpm.fromssize; 373 if (sysctl(mib, 3, froms, &i, NULL, 0) < 0) 374 i = 0; 375 } 376 if (i != kvp->gpm.fromssize) { 377 (void)fprintf(stderr, "kgmon: read froms: read %u, got %d: %s", 378 kvp->gpm.fromssize, i, 379 kflag ? kvm_geterr(kvp->kd) : strerror(errno)); 380 exit(9); 381 } 382 if ((tos = (struct tostruct *)malloc(kvp->gpm.tossize)) == NULL) { 383 fprintf(stderr, "kgmon: cannot allocate tos space\n"); 384 exit(10); 385 } 386 if (kflag) { 387 i = kvm_read(kvp->kd, (u_long)kvp->gpm.tos, (void *)tos, 388 kvp->gpm.tossize); 389 } else { 390 mib[2] = GPROF_TOS; 391 i = kvp->gpm.tossize; 392 if (sysctl(mib, 3, tos, &i, NULL, 0) < 0) 393 i = 0; 394 } 395 if (i != kvp->gpm.tossize) { 396 (void)fprintf(stderr, "kgmon: read tos: read %u, got %d: %s", 397 kvp->gpm.tossize, i, 398 kflag ? kvm_geterr(kvp->kd) : strerror(errno)); 399 exit(11); 400 } 401 if (debug) 402 (void)fprintf(stderr, "kgmon: lowpc 0x%x, textsize 0x%x\n", 403 kvp->gpm.lowpc, kvp->gpm.textsize); 404 endfrom = kvp->gpm.fromssize / sizeof(*froms); 405 for (fromindex = 0; fromindex < endfrom; ++fromindex) { 406 if (froms[fromindex] == 0) 407 continue; 408 frompc = (u_long)kvp->gpm.lowpc + 409 (fromindex * kvp->gpm.hashfraction * sizeof(*froms)); 410 for (toindex = froms[fromindex]; toindex != 0; 411 toindex = tos[toindex].link) { 412 if (debug) 413 (void)fprintf(stderr, 414 "%s: [mcleanup] frompc 0x%x selfpc 0x%x count %d\n", 415 "kgmon", frompc, tos[toindex].selfpc, 416 tos[toindex].count); 417 rawarc.raw_frompc = frompc; 418 rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; 419 rawarc.raw_count = tos[toindex].count; 420 fwrite((char *)&rawarc, sizeof(rawarc), 1, fp); 421 } 422 } 423 fclose(fp); 424 } 425 426 /* 427 * Get the profiling rate. 428 */ 429 int 430 getprofhz(kvp) 431 struct kvmvars *kvp; 432 { 433 int mib[2], size, profrate; 434 struct clockinfo clockrate; 435 436 if (kflag) { 437 profrate = 1; 438 if (kvm_read(kvp->kd, nl[N_PROFHZ].n_value, &profrate, 439 sizeof profrate) != sizeof profrate) 440 (void)fprintf(stderr, "kgmon: get clockrate: %s\n", 441 kvm_geterr(kvp->kd)); 442 return (profrate); 443 } 444 mib[0] = CTL_KERN; 445 mib[1] = KERN_CLOCKRATE; 446 clockrate.profhz = 1; 447 size = sizeof clockrate; 448 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) < 0) 449 (void)fprintf(stderr, "kgmon: get clockrate: %s\n", 450 strerror(errno)); 451 return (clockrate.profhz); 452 } 453 454 /* 455 * Reset the kernel profiling date structures. 456 */ 457 void 458 reset(kvp) 459 struct kvmvars *kvp; 460 { 461 char *zbuf; 462 u_long biggest; 463 int mib[3]; 464 465 setprof(kvp, GMON_PROF_OFF); 466 467 biggest = kvp->gpm.kcountsize; 468 if (kvp->gpm.fromssize > biggest) 469 biggest = kvp->gpm.fromssize; 470 if (kvp->gpm.tossize > biggest) 471 biggest = kvp->gpm.tossize; 472 if ((zbuf = (char *)malloc(biggest)) == NULL) { 473 fprintf(stderr, "kgmon: cannot allocate zbuf space\n"); 474 exit(12); 475 } 476 bzero(zbuf, biggest); 477 if (kflag) { 478 if (kvm_write(kvp->kd, (u_long)kvp->gpm.kcount, zbuf, 479 kvp->gpm.kcountsize) != kvp->gpm.kcountsize) { 480 (void)fprintf(stderr, "kgmon: tickbuf zero: %s\n", 481 kvm_geterr(kvp->kd)); 482 exit(13); 483 } 484 if (kvm_write(kvp->kd, (u_long)kvp->gpm.froms, zbuf, 485 kvp->gpm.fromssize) != kvp->gpm.fromssize) { 486 (void)fprintf(stderr, "kgmon: froms zero: %s\n", 487 kvm_geterr(kvp->kd)); 488 exit(14); 489 } 490 if (kvm_write(kvp->kd, (u_long)kvp->gpm.tos, zbuf, 491 kvp->gpm.tossize) != kvp->gpm.tossize) { 492 (void)fprintf(stderr, "kgmon: tos zero: %s\n", 493 kvm_geterr(kvp->kd)); 494 exit(15); 495 } 496 return; 497 } 498 (void)seteuid(0); 499 mib[0] = CTL_KERN; 500 mib[1] = KERN_PROF; 501 mib[2] = GPROF_COUNT; 502 if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.kcountsize) < 0) { 503 (void)fprintf(stderr, "kgmon: tickbuf zero: %s\n", 504 strerror(errno)); 505 exit(13); 506 } 507 mib[2] = GPROF_FROMS; 508 if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.fromssize) < 0) { 509 (void)fprintf(stderr, "kgmon: froms zero: %s\n", 510 strerror(errno)); 511 exit(14); 512 } 513 mib[2] = GPROF_TOS; 514 if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.tossize) < 0) { 515 (void)fprintf(stderr, "kgmon: tos zero: %s\n", 516 strerror(errno)); 517 exit(15); 518 } 519 (void)seteuid(getuid()); 520 free(zbuf); 521 } 522
Indexes created Thu Sep 25 16:09:42 GMT 2025