2 * Copyright (c) 1983, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1983, 1992, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)kgmon.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.sbin/kgmon/kgmon.c,v 1.9 1999/08/28 01:16:42 peter Exp $
36 * $DragonFly: src/usr.sbin/kgmon/kgmon.c,v 1.5 2004/04/21 21:29:55 cpressey Exp $
39 #include <sys/param.h>
42 #include <sys/sysctl.h>
69 int Bflag, bflag, hflag, kflag, rflag, pflag;
71 int getprof(struct kvmvars *);
72 int getprofhz(struct kvmvars *);
73 void kern_readonly(int);
74 int openfiles(char *, char *, struct kvmvars *);
75 void setprof(struct kvmvars *kvp, int state);
76 void dumpstate(struct kvmvars *kvp);
77 void reset(struct kvmvars *kvp);
78 static void usage(void);
81 main(int argc, char **argv)
83 int ch, mode, disp, accessmode;
84 struct kvmvars kvmvars;
90 while ((ch = getopt(argc, argv, "M:N:Bbhpr")) != -1) {
129 #define BACKWARD_COMPATIBILITY
130 #ifdef BACKWARD_COMPATIBILITY
140 system = (char *)getbootfile();
141 accessmode = openfiles(system, kmemf, &kvmvars);
142 mode = getprof(&kvmvars);
144 disp = GMON_PROF_OFF;
146 disp = GMON_PROF_HIRES;
155 if (accessmode == O_RDWR)
156 setprof(&kvmvars, disp);
157 fprintf(stdout, "kgmon: kernel profiling is %s.\n",
158 disp == GMON_PROF_OFF ? "off" :
159 disp == GMON_PROF_HIRES ? "running (high resolution)" :
160 disp == GMON_PROF_ON ? "running" :
161 disp == GMON_PROF_BUSY ? "busy" :
162 disp == GMON_PROF_ERROR ? "off (error)" :
163 "in an unknown state");
170 fprintf(stderr, "usage: kgmon [-Bbhrp] [-M core] [-N system]\n");
175 * Check that profiling is enabled and open any ncessary files.
178 openfiles(char *system, char *kmemf, struct kvmvars *kvp)
180 int mib[3], state, size, openmode;
181 char errbuf[_POSIX2_LINE_MAX];
186 mib[2] = GPROF_STATE;
188 if (sysctl(mib, 3, &state, &size, NULL, 0) < 0)
189 errx(20, "profiling not defined in kernel");
190 if (!(Bflag || bflag || hflag || rflag ||
192 (state == GMON_PROF_HIRES || state == GMON_PROF_ON))))
195 if (sysctl(mib, 3, NULL, NULL, &state, size) >= 0)
198 kern_readonly(state);
201 openmode = (Bflag || bflag || hflag || pflag || rflag)
203 kvp->kd = kvm_openfiles(system, kmemf, NULL, openmode, errbuf);
204 if (kvp->kd == NULL) {
205 if (openmode == O_RDWR) {
207 kvp->kd = kvm_openfiles(system, kmemf, NULL, O_RDONLY,
211 errx(2, "kvm_openfiles: %s", errbuf);
212 kern_readonly(GMON_PROF_ON);
214 if (kvm_nlist(kvp->kd, nl) < 0)
215 errx(3, "%s: no namelist", system);
216 if (!nl[N_GMONPARAM].n_value)
217 errx(20, "profiling not defined in kernel");
222 * Suppress options that require a writable kernel.
225 kern_readonly(int mode)
227 fprintf(stderr, "kgmon: kernel read-only: ");
228 if (pflag && (mode == GMON_PROF_HIRES || mode == GMON_PROF_ON))
229 fprintf(stderr, "data may be inconsistent\n");
231 fprintf(stderr, "-r supressed\n");
233 fprintf(stderr, "-B supressed\n");
235 fprintf(stderr, "-b supressed\n");
237 fprintf(stderr, "-h supressed\n");
238 rflag = Bflag = bflag = hflag = 0;
242 * Get the state of kernel profiling.
245 getprof(struct kvmvars *kvp)
250 size = kvm_read(kvp->kd, nl[N_GMONPARAM].n_value, &kvp->gpm,
255 mib[2] = GPROF_GMONPARAM;
256 size = sizeof kvp->gpm;
257 if (sysctl(mib, 3, &kvp->gpm, &size, NULL, 0) < 0)
260 if (size != sizeof kvp->gpm)
261 errx(4, "cannot get gmonparam: %s",
262 kflag ? kvm_geterr(kvp->kd) : strerror(errno));
263 return (kvp->gpm.state);
267 * Enable or disable kernel profiling according to the state variable.
270 setprof(struct kvmvars *kvp, int state)
272 struct gmonparam *p = (struct gmonparam *)nl[N_GMONPARAM].n_value;
273 int mib[3], sz, oldstate;
279 mib[2] = GPROF_STATE;
280 if (sysctl(mib, 3, &oldstate, &sz, NULL, 0) < 0)
282 if (oldstate == state)
285 if (sysctl(mib, 3, NULL, NULL, &state, sz) >= 0) {
290 } else if (kvm_write(kvp->kd, (u_long)&p->state, (void *)&state, sz)
294 warnx("warning: cannot turn profiling %s",
295 state == GMON_PROF_OFF ? "off" : "on");
299 * Build the gmon.out file.
302 dumpstate(struct kvmvars *kvp)
305 struct rawarc rawarc;
306 struct tostruct *tos;
308 u_short *froms, *tickbuf;
311 int fromindex, endfrom, toindex;
313 setprof(kvp, GMON_PROF_OFF);
314 fp = fopen("gmon.out", "w");
321 * Build the gmon header and write it to a file.
323 bzero(&h, sizeof(h));
324 h.lpc = kvp->gpm.lowpc;
325 h.hpc = kvp->gpm.highpc;
326 h.ncnt = kvp->gpm.kcountsize + sizeof(h);
327 h.version = GMONVERSION;
328 h.profrate = kvp->gpm.profrate;
330 h.profrate = getprofhz(kvp); /* ancient kernel */
331 fwrite((char *)&h, sizeof(h), 1, fp);
334 * Write out the tick buffer.
338 if ((tickbuf = (u_short *)malloc(kvp->gpm.kcountsize)) == NULL)
339 errx(5, "cannot allocate kcount space");
341 i = kvm_read(kvp->kd, (u_long)kvp->gpm.kcount, (void *)tickbuf,
342 kvp->gpm.kcountsize);
344 mib[2] = GPROF_COUNT;
345 i = kvp->gpm.kcountsize;
346 if (sysctl(mib, 3, tickbuf, &i, NULL, 0) < 0)
349 if (i != kvp->gpm.kcountsize)
350 errx(6, "read ticks: read %u, got %d: %s",
351 kvp->gpm.kcountsize, i,
352 kflag ? kvm_geterr(kvp->kd) : strerror(errno));
353 if ((fwrite(tickbuf, kvp->gpm.kcountsize, 1, fp)) != 1)
354 err(7, "writing tocks to gmon.out");
358 * Write out the arc info.
360 if ((froms = (u_short *)malloc(kvp->gpm.fromssize)) == NULL)
361 errx(8, "cannot allocate froms space");
363 i = kvm_read(kvp->kd, (u_long)kvp->gpm.froms, (void *)froms,
366 mib[2] = GPROF_FROMS;
367 i = kvp->gpm.fromssize;
368 if (sysctl(mib, 3, froms, &i, NULL, 0) < 0)
371 if (i != kvp->gpm.fromssize)
372 errx(9, "read froms: read %u, got %d: %s",
373 kvp->gpm.fromssize, i,
374 kflag ? kvm_geterr(kvp->kd) : strerror(errno));
375 if ((tos = (struct tostruct *)malloc(kvp->gpm.tossize)) == NULL)
376 errx(10, "cannot allocate tos space");
378 i = kvm_read(kvp->kd, (u_long)kvp->gpm.tos, (void *)tos,
382 i = kvp->gpm.tossize;
383 if (sysctl(mib, 3, tos, &i, NULL, 0) < 0)
386 if (i != kvp->gpm.tossize)
387 errx(11, "read tos: read %u, got %d: %s",
389 kflag ? kvm_geterr(kvp->kd) : strerror(errno));
391 warnx("lowpc 0x%x, textsize 0x%x",
392 kvp->gpm.lowpc, kvp->gpm.textsize);
393 endfrom = kvp->gpm.fromssize / sizeof(*froms);
394 for (fromindex = 0; fromindex < endfrom; ++fromindex) {
395 if (froms[fromindex] == 0)
397 frompc = (u_long)kvp->gpm.lowpc +
398 (fromindex * kvp->gpm.hashfraction * sizeof(*froms));
399 for (toindex = froms[fromindex]; toindex != 0;
400 toindex = tos[toindex].link) {
402 warnx("[mcleanup] frompc 0x%x selfpc 0x%x count %d",
403 frompc, tos[toindex].selfpc,
405 rawarc.raw_frompc = frompc;
406 rawarc.raw_selfpc = (u_long)tos[toindex].selfpc;
407 rawarc.raw_count = tos[toindex].count;
408 fwrite((char *)&rawarc, sizeof(rawarc), 1, fp);
415 * Get the profiling rate.
418 getprofhz(struct kvmvars *kvp)
420 int mib[2], size, profrate;
421 struct clockinfo clockrate;
425 if (kvm_read(kvp->kd, nl[N_PROFHZ].n_value, &profrate,
426 sizeof profrate) != sizeof profrate)
427 warnx("get clockrate: %s", kvm_geterr(kvp->kd));
431 mib[1] = KERN_CLOCKRATE;
432 clockrate.profhz = 1;
433 size = sizeof clockrate;
434 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) < 0)
435 warn("get clockrate");
436 return (clockrate.profhz);
440 * Reset the kernel profiling date structures.
443 reset(struct kvmvars *kvp)
449 setprof(kvp, GMON_PROF_OFF);
451 biggest = kvp->gpm.kcountsize;
452 if (kvp->gpm.fromssize > biggest)
453 biggest = kvp->gpm.fromssize;
454 if (kvp->gpm.tossize > biggest)
455 biggest = kvp->gpm.tossize;
456 if ((zbuf = (char *)malloc(biggest)) == NULL)
457 errx(12, "cannot allocate zbuf space");
458 bzero(zbuf, biggest);
460 if (kvm_write(kvp->kd, (u_long)kvp->gpm.kcount, zbuf,
461 kvp->gpm.kcountsize) != kvp->gpm.kcountsize)
462 errx(13, "tickbuf zero: %s", kvm_geterr(kvp->kd));
463 if (kvm_write(kvp->kd, (u_long)kvp->gpm.froms, zbuf,
464 kvp->gpm.fromssize) != kvp->gpm.fromssize)
465 errx(14, "froms zero: %s", kvm_geterr(kvp->kd));
466 if (kvm_write(kvp->kd, (u_long)kvp->gpm.tos, zbuf,
467 kvp->gpm.tossize) != kvp->gpm.tossize)
468 errx(15, "tos zero: %s", kvm_geterr(kvp->kd));
474 mib[2] = GPROF_COUNT;
475 if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.kcountsize) < 0)
476 err(13, "tickbuf zero");
477 mib[2] = GPROF_FROMS;
478 if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.fromssize) < 0)
479 err(14, "froms zero");
481 if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.tossize) < 0)