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- /*
- * Copyright (c) 1983 The Regents of the University of California.
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1983 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)kgmon.c 5.12 (Berkeley) 7/1/91";
- #endif /* not lint */
-
- #include <sys/param.h>
- #if BSD >= 199103
- #define NEWVM
- #endif
- #include <sys/file.h>
- #ifndef NEWVM
- #include <machine/pte.h>
- #include <sys/vm.h>
- #endif
- #include <sys/gprof.h>
- #include <stdio.h>
- #include <nlist.h>
- #include <ctype.h>
- #include <paths.h>
-
- #define PROFILING_ON 0
- #define PROFILING_OFF 3
-
- u_long s_textsize;
- off_t sbuf, klseek(), lseek();
- int ssiz;
-
- struct nlist nl[] = {
- #define N_SYSMAP 0
- { "_Sysmap" },
- #define N_SYSSIZE 1
- { "_Syssize" },
- #define N_FROMS 2
- { "_froms" },
- #define N_PROFILING 3
- { "_profiling" },
- #define N_S_LOWPC 4
- { "_s_lowpc" },
- #define N_S_TEXTSIZE 5
- { "_s_textsize" },
- #define N_SBUF 6
- { "_sbuf" },
- #define N_SSIZ 7
- { "_ssiz" },
- #define N_TOS 8
- { "_tos" },
- 0,
- };
-
- struct pte *Sysmap;
-
- int kmem;
- int bflag, hflag, kflag, rflag, pflag;
- int debug = 0;
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- extern char *optarg;
- extern int optind;
- int ch, mode, disp, openmode;
- char *system, *kmemf, *malloc();
-
- kmemf = _PATH_KMEM;
- system = _PATH_UNIX;
- while ((ch = getopt(argc, argv, "M:N:bhpr")) != EOF)
- switch((char)ch) {
- case 'M':
- kmemf = optarg;
- kflag = 1;
- break;
- case 'N':
- system = optarg;
- break;
- case 'b':
- bflag = 1;
- break;
- case 'h':
- hflag = 1;
- break;
- case 'p':
- pflag = 1;
- break;
- case 'r':
- rflag = 1;
- break;
- default:
- (void)fprintf(stderr,
- "usage: kgmon [-bhrp] [-M core] [-N system]\n");
- exit(1);
- }
- argc -= optind;
- argv += optind;
-
- #define BACKWARD_COMPATIBILITY
- #ifdef BACKWARD_COMPATIBILITY
- if (*argv) {
- system = *argv;
- if (*++argv) {
- kmemf = *argv;
- ++kflag;
- }
- }
- #endif
-
- if (nlist(system, nl) < 0 || nl[0].n_type == 0) {
- (void)fprintf(stderr, "kgmon: %s: no namelist\n", system);
- exit(2);
- }
- if (!nl[N_PROFILING].n_value) {
- (void)fprintf(stderr,
- "kgmon: profiling: not defined in kernel.\n");
- exit(10);
- }
-
- openmode = (bflag || hflag || pflag || rflag) ? O_RDWR : O_RDONLY;
- kmem = open(kmemf, openmode);
- if (kmem < 0) {
- openmode = O_RDONLY;
- kmem = open(kmemf, openmode);
- if (kmem < 0) {
- perror(kmemf);
- exit(3);
- }
- (void)fprintf(stderr, "%s opened read-only\n", kmemf);
- if (rflag)
- (void)fprintf(stderr, "-r supressed\n");
- if (bflag)
- (void)fprintf(stderr, "-b supressed\n");
- if (hflag)
- (void)fprintf(stderr, "-h supressed\n");
- rflag = bflag = hflag = 0;
- }
- if (kflag) {
- #ifdef NEWVM
- (void)fprintf(stderr,
- "kgmon: can't do core files yet\n");
- exit(1);
- #else
- off_t off;
-
- Sysmap = (struct pte *)
- malloc((u_int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
- if (!Sysmap) {
- (void)fprintf(stderr,
- "kgmon: can't get memory for Sysmap.\n");
- exit(1);
- }
- off = nl[N_SYSMAP].n_value & ~KERNBASE;
- (void)lseek(kmem, off, L_SET);
- (void)read(kmem, (char *)Sysmap,
- (int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
- #endif
- }
- mode = kfetch(N_PROFILING);
- if (hflag)
- disp = PROFILING_OFF;
- else if (bflag)
- disp = PROFILING_ON;
- else
- disp = mode;
- if (pflag) {
- if (openmode == O_RDONLY && mode == PROFILING_ON)
- (void)fprintf(stderr, "data may be inconsistent\n");
- dumpstate();
- }
- if (rflag)
- resetstate();
- turnonoff(disp);
- (void)fprintf(stdout,
- "kernel profiling is %s.\n", disp ? "off" : "running");
- exit(0);
- }
-
- dumpstate()
- {
- extern int errno;
- struct rawarc rawarc;
- struct tostruct *tos;
- u_long frompc;
- off_t kfroms, ktos;
- u_short *froms; /* froms is a bunch of u_shorts indexing tos */
- int i, fd, fromindex, endfrom, fromssize, tossize, toindex;
- char buf[BUFSIZ], *s_lowpc, *malloc(), *strerror();
-
- turnonoff(PROFILING_OFF);
- fd = creat("gmon.out", 0666);
- if (fd < 0) {
- perror("gmon.out");
- return;
- }
- ssiz = kfetch(N_SSIZ);
- sbuf = kfetch(N_SBUF);
- (void)klseek(kmem, (off_t)sbuf, L_SET);
- for (i = ssiz; i > 0; i -= BUFSIZ) {
- read(kmem, buf, i < BUFSIZ ? i : BUFSIZ);
- write(fd, buf, i < BUFSIZ ? i : BUFSIZ);
- }
- s_textsize = kfetch(N_S_TEXTSIZE);
- fromssize = s_textsize / HASHFRACTION;
- froms = (u_short *)malloc((u_int)fromssize);
- kfroms = kfetch(N_FROMS);
- (void)klseek(kmem, kfroms, L_SET);
- i = read(kmem, ((char *)(froms)), fromssize);
- if (i != fromssize) {
- (void)fprintf(stderr, "read kmem: request %d, got %d: %s",
- fromssize, i, strerror(errno));
- exit(5);
- }
- tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct);
- tos = (struct tostruct *)malloc((u_int)tossize);
- ktos = kfetch(N_TOS);
- (void)klseek(kmem, ktos, L_SET);
- i = read(kmem, ((char *)(tos)), tossize);
- if (i != tossize) {
- (void)fprintf(stderr, "read kmem: request %d, got %d: %s",
- tossize, i, strerror(errno));
- exit(6);
- }
- s_lowpc = (char *)kfetch(N_S_LOWPC);
- if (debug)
- (void)fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n",
- s_lowpc, s_textsize);
- endfrom = fromssize / sizeof(*froms);
- for (fromindex = 0; fromindex < endfrom; fromindex++) {
- if (froms[fromindex] == 0)
- continue;
- frompc = (u_long)s_lowpc +
- (fromindex * HASHFRACTION * sizeof(*froms));
- for (toindex = froms[fromindex]; toindex != 0;
- toindex = tos[toindex].link) {
- if (debug)
- (void)fprintf(stderr,
- "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" ,
- frompc, tos[toindex].selfpc, tos[toindex].count);
- rawarc.raw_frompc = frompc;
- rawarc.raw_selfpc = (u_long)tos[toindex].selfpc;
- rawarc.raw_count = tos[toindex].count;
- write(fd, (char *)&rawarc, sizeof (rawarc));
- }
- }
- close(fd);
- }
-
- resetstate()
- {
- off_t kfroms, ktos;
- int i, fromssize, tossize;
- char buf[BUFSIZ];
-
- turnonoff(PROFILING_OFF);
- bzero(buf, BUFSIZ);
- ssiz = kfetch(N_SSIZ);
- sbuf = kfetch(N_SBUF);
- ssiz -= sizeof(struct phdr);
- sbuf += sizeof(struct phdr);
- (void)klseek(kmem, (off_t)sbuf, L_SET);
- for (i = ssiz; i > 0; i -= BUFSIZ)
- if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) {
- perror("sbuf write");
- exit(7);
- }
- s_textsize = kfetch(N_S_TEXTSIZE);
- fromssize = s_textsize / HASHFRACTION;
- kfroms = kfetch(N_FROMS);
- (void)klseek(kmem, kfroms, L_SET);
- for (i = fromssize; i > 0; i -= BUFSIZ)
- if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) {
- perror("kforms write");
- exit(8);
- }
- tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct);
- ktos = kfetch(N_TOS);
- (void)klseek(kmem, ktos, L_SET);
- for (i = tossize; i > 0; i -= BUFSIZ)
- if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) {
- perror("ktos write");
- exit(9);
- }
- }
-
- turnonoff(onoff)
- int onoff;
- {
- (void)klseek(kmem, (long)nl[N_PROFILING].n_value, L_SET);
- (void)write(kmem, (char *)&onoff, sizeof (onoff));
- }
-
- kfetch(index)
- int index;
- {
- off_t off;
- int value;
-
- if ((off = nl[index].n_value) == 0) {
- printf("%s: not defined in kernel\n", nl[index].n_name);
- exit(11);
- }
- if (klseek(kmem, off, L_SET) == -1) {
- perror("lseek");
- exit(12);
- }
- if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) {
- perror("read");
- exit(13);
- }
- return (value);
- }
-
- off_t
- klseek(fd, base, off)
- int fd, off;
- off_t base;
- {
-
- #ifndef NEWVM
- if (kflag) { /* get kernel pte */
- base &= ~KERNBASE;
- base = ctob(Sysmap[btop(base)].pg_pfnum) + (base & PGOFSET);
- }
- #endif
- return (lseek(fd, base, off));
- }
-