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528b0614 | 1 | /* |
c82fa61b KB |
2 | * Copyright (c) 1983 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
528b0614 DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
19 | char copyright[] = | |
c82fa61b | 20 | "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ |
528b0614 | 21 | All rights reserved.\n"; |
4d32c205 | 22 | #endif /* not lint */ |
528b0614 | 23 | |
d841a9ba | 24 | #ifndef lint |
c82fa61b | 25 | static char sccsid[] = "@(#)kgmon.c 5.5 (Berkeley) %G%"; |
4d32c205 | 26 | #endif /* not lint */ |
d841a9ba KM |
27 | |
28 | #include <sys/param.h> | |
01538592 | 29 | #include <machine/pte.h> |
769cbf71 | 30 | #include <sys/file.h> |
fa7eedc6 | 31 | #include <sys/vm.h> |
d841a9ba KM |
32 | #include <stdio.h> |
33 | #include <nlist.h> | |
34 | #include <ctype.h> | |
78e8943b | 35 | #include <sys/gprof.h> |
d841a9ba KM |
36 | |
37 | #define PROFILING_ON 0 | |
4d32c205 | 38 | #define PROFILING_OFF 3 |
d841a9ba | 39 | |
d841a9ba | 40 | u_long s_textsize; |
4d32c205 | 41 | off_t sbuf, klseek(), lseek(); |
d841a9ba | 42 | int ssiz; |
d841a9ba KM |
43 | |
44 | struct nlist nl[] = { | |
45 | #define N_SYSMAP 0 | |
46 | { "_Sysmap" }, | |
47 | #define N_SYSSIZE 1 | |
48 | { "_Syssize" }, | |
49 | #define N_FROMS 2 | |
50 | { "_froms" }, | |
51 | #define N_PROFILING 3 | |
52 | { "_profiling" }, | |
53 | #define N_S_LOWPC 4 | |
54 | { "_s_lowpc" }, | |
55 | #define N_S_TEXTSIZE 5 | |
56 | { "_s_textsize" }, | |
57 | #define N_SBUF 6 | |
58 | { "_sbuf" }, | |
59 | #define N_SSIZ 7 | |
60 | { "_ssiz" }, | |
61 | #define N_TOS 8 | |
62 | { "_tos" }, | |
63 | 0, | |
64 | }; | |
65 | ||
66 | struct pte *Sysmap; | |
67 | ||
d841a9ba | 68 | int kmem; |
ecc6febd | 69 | int bflag, hflag, kflag, rflag, pflag; |
78e8943b | 70 | int debug = 0; |
d841a9ba KM |
71 | |
72 | main(argc, argv) | |
73 | int argc; | |
74 | char *argv[]; | |
75 | { | |
4d32c205 KB |
76 | extern char *optarg; |
77 | extern int optind; | |
78 | int ch, mode, disp, openmode; | |
79 | char *system, *kmemf, *malloc(); | |
d841a9ba | 80 | |
4d32c205 KB |
81 | while ((ch = getopt(argc, argv, "bhpr")) != EOF) |
82 | switch((char)ch) { | |
78e8943b KM |
83 | case 'b': |
84 | bflag++; | |
85 | break; | |
86 | case 'h': | |
87 | hflag++; | |
78e8943b | 88 | break; |
ecc6febd KM |
89 | case 'p': |
90 | pflag++; | |
4d32c205 KB |
91 | break; |
92 | case 'r': | |
93 | rflag++; | |
78e8943b KM |
94 | break; |
95 | default: | |
4d32c205 | 96 | fputs("usage: kgmon [-bhrp] [system [core]]\n", stderr); |
78e8943b KM |
97 | exit(1); |
98 | } | |
4d32c205 KB |
99 | |
100 | openmode = (bflag || hflag || pflag || rflag) ? O_RDWR : O_RDONLY; | |
101 | ||
102 | kmemf = "/dev/kmem"; | |
d841a9ba KM |
103 | if (argc > 0) { |
104 | system = *argv; | |
105 | argv++, argc--; | |
4d32c205 KB |
106 | if (argc > 0) { |
107 | kmemf = *argv; | |
108 | kflag++; | |
109 | } | |
d841a9ba | 110 | } |
4d32c205 KB |
111 | else |
112 | system = "/vmunix"; | |
113 | ||
114 | if (nlist(system, nl) < 0 || nl[0].n_type == 0) { | |
d841a9ba | 115 | fprintf(stderr, "%s: no namelist\n", system); |
01538592 | 116 | exit(2); |
d841a9ba | 117 | } |
4d32c205 KB |
118 | if (!nl[N_PROFILING].n_value) { |
119 | fputs("profiling: not defined in kernel.\n", stderr); | |
120 | exit(10); | |
d841a9ba | 121 | } |
ecc6febd | 122 | kmem = open(kmemf, openmode); |
d841a9ba | 123 | if (kmem < 0) { |
769cbf71 | 124 | openmode = O_RDONLY; |
ecc6febd | 125 | kmem = open(kmemf, openmode); |
d841a9ba | 126 | if (kmem < 0) { |
d841a9ba | 127 | perror(kmemf); |
01538592 | 128 | exit(3); |
d841a9ba | 129 | } |
78e8943b | 130 | fprintf(stderr, "%s opened read-only\n", kmemf); |
78e8943b KM |
131 | if (rflag) |
132 | fprintf(stderr, "-r supressed\n"); | |
133 | if (bflag) | |
134 | fprintf(stderr, "-b supressed\n"); | |
135 | if (hflag) | |
136 | fprintf(stderr, "-h supressed\n"); | |
4d32c205 | 137 | rflag = bflag = hflag = 0; |
d841a9ba | 138 | } |
78e8943b | 139 | if (kflag) { |
d841a9ba KM |
140 | off_t off; |
141 | ||
4d32c205 KB |
142 | Sysmap = (struct pte *) |
143 | malloc((u_int)(nl[N_SYSSIZE].n_value * sizeof(struct pte))); | |
144 | if (!Sysmap) { | |
145 | fputs("arp: can't get memory for Sysmap.\n", stderr); | |
146 | exit(1); | |
d841a9ba | 147 | } |
4d32c205 KB |
148 | off = nl[N_SYSMAP].n_value & ~KERNBASE; |
149 | (void)lseek(kmem, off, L_SET); | |
150 | (void)read(kmem, (char *)Sysmap, | |
151 | (int)(nl[N_SYSSIZE].n_value * sizeof(struct pte))); | |
d841a9ba | 152 | } |
79ec4952 | 153 | mode = kfetch(N_PROFILING); |
78e8943b KM |
154 | if (hflag) |
155 | disp = PROFILING_OFF; | |
156 | else if (bflag) | |
157 | disp = PROFILING_ON; | |
158 | else | |
79ec4952 | 159 | disp = mode; |
ecc6febd | 160 | if (pflag) { |
769cbf71 | 161 | if (openmode == O_RDONLY && mode == PROFILING_ON) |
79ec4952 | 162 | fprintf(stderr, "data may be inconsistent\n"); |
78e8943b | 163 | dumpstate(); |
79ec4952 | 164 | } |
78e8943b KM |
165 | if (rflag) |
166 | resetstate(); | |
167 | turnonoff(disp); | |
79ec4952 | 168 | fprintf(stdout, "kernel profiling is %s.\n", disp ? "off" : "running"); |
78e8943b KM |
169 | } |
170 | ||
171 | dumpstate() | |
172 | { | |
78e8943b | 173 | struct rawarc rawarc; |
4d32c205 KB |
174 | struct tostruct *tos; |
175 | u_long frompc; | |
176 | off_t kfroms, ktos; | |
177 | u_short *froms; /* froms is a bunch of u_shorts indexing tos */ | |
178 | int i, fd, fromindex, endfrom, fromssize, tossize, toindex; | |
179 | char buf[BUFSIZ], *s_lowpc, *malloc(); | |
78e8943b | 180 | |
d841a9ba KM |
181 | turnonoff(PROFILING_OFF); |
182 | fd = creat("gmon.out", 0666); | |
183 | if (fd < 0) { | |
184 | perror("gmon.out"); | |
185 | return; | |
186 | } | |
187 | ssiz = kfetch(N_SSIZ); | |
188 | sbuf = kfetch(N_SBUF); | |
4d32c205 | 189 | (void)klseek(kmem, (off_t)sbuf, L_SET); |
d841a9ba KM |
190 | for (i = ssiz; i > 0; i -= BUFSIZ) { |
191 | read(kmem, buf, i < BUFSIZ ? i : BUFSIZ); | |
192 | write(fd, buf, i < BUFSIZ ? i : BUFSIZ); | |
193 | } | |
194 | s_textsize = kfetch(N_S_TEXTSIZE); | |
78e8943b | 195 | fromssize = s_textsize / HASHFRACTION; |
4d32c205 | 196 | froms = (u_short *)malloc((u_int)fromssize); |
d841a9ba | 197 | kfroms = kfetch(N_FROMS); |
4d32c205 | 198 | (void)klseek(kmem, kfroms, L_SET); |
78e8943b KM |
199 | i = read(kmem, ((char *)(froms)), fromssize); |
200 | if (i != fromssize) { | |
201 | fprintf(stderr, "read froms: request %d, got %d", fromssize, i); | |
4d32c205 | 202 | perror((char *)NULL); |
78e8943b | 203 | exit(5); |
d841a9ba | 204 | } |
78e8943b | 205 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
4d32c205 | 206 | tos = (struct tostruct *)malloc((u_int)tossize); |
d841a9ba | 207 | ktos = kfetch(N_TOS); |
4d32c205 | 208 | (void)klseek(kmem, ktos, L_SET); |
78e8943b KM |
209 | i = read(kmem, ((char *)(tos)), tossize); |
210 | if (i != tossize) { | |
211 | fprintf(stderr, "read tos: request %d, got %d", tossize, i); | |
4d32c205 | 212 | perror((char *)NULL); |
78e8943b | 213 | exit(6); |
d841a9ba KM |
214 | } |
215 | s_lowpc = (char *)kfetch(N_S_LOWPC); | |
216 | if (debug) | |
217 | fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n", | |
218 | s_lowpc, s_textsize); | |
78e8943b KM |
219 | endfrom = fromssize / sizeof(*froms); |
220 | for (fromindex = 0; fromindex < endfrom; fromindex++) { | |
d841a9ba KM |
221 | if (froms[fromindex] == 0) |
222 | continue; | |
78e8943b KM |
223 | frompc = (u_long)s_lowpc + |
224 | (fromindex * HASHFRACTION * sizeof(*froms)); | |
d841a9ba KM |
225 | for (toindex = froms[fromindex]; toindex != 0; |
226 | toindex = tos[toindex].link) { | |
227 | if (debug) | |
228 | fprintf(stderr, | |
229 | "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" , | |
230 | frompc, tos[toindex].selfpc, tos[toindex].count); | |
231 | rawarc.raw_frompc = frompc; | |
232 | rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; | |
233 | rawarc.raw_count = tos[toindex].count; | |
4d32c205 | 234 | write(fd, (char *)&rawarc, sizeof (rawarc)); |
d841a9ba KM |
235 | } |
236 | } | |
237 | close(fd); | |
78e8943b KM |
238 | } |
239 | ||
240 | resetstate() | |
241 | { | |
78e8943b | 242 | off_t kfroms, ktos; |
4d32c205 | 243 | int i, fromssize, tossize; |
78e8943b KM |
244 | char buf[BUFSIZ]; |
245 | ||
246 | turnonoff(PROFILING_OFF); | |
247 | bzero(buf, BUFSIZ); | |
248 | ssiz = kfetch(N_SSIZ); | |
249 | sbuf = kfetch(N_SBUF); | |
250 | ssiz -= sizeof(struct phdr); | |
251 | sbuf += sizeof(struct phdr); | |
4d32c205 | 252 | (void)klseek(kmem, (off_t)sbuf, L_SET); |
78e8943b KM |
253 | for (i = ssiz; i > 0; i -= BUFSIZ) |
254 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
255 | perror("sbuf write"); | |
01538592 | 256 | exit(7); |
78e8943b KM |
257 | } |
258 | s_textsize = kfetch(N_S_TEXTSIZE); | |
259 | fromssize = s_textsize / HASHFRACTION; | |
260 | kfroms = kfetch(N_FROMS); | |
4d32c205 | 261 | (void)klseek(kmem, kfroms, L_SET); |
78e8943b KM |
262 | for (i = fromssize; i > 0; i -= BUFSIZ) |
263 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
264 | perror("kforms write"); | |
01538592 | 265 | exit(8); |
78e8943b KM |
266 | } |
267 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); | |
268 | ktos = kfetch(N_TOS); | |
4d32c205 | 269 | (void)klseek(kmem, ktos, L_SET); |
78e8943b KM |
270 | for (i = tossize; i > 0; i -= BUFSIZ) |
271 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
272 | perror("ktos write"); | |
01538592 | 273 | exit(9); |
78e8943b | 274 | } |
d841a9ba KM |
275 | } |
276 | ||
277 | turnonoff(onoff) | |
278 | int onoff; | |
279 | { | |
4d32c205 KB |
280 | (void)klseek(kmem, (long)nl[N_PROFILING].n_value, L_SET); |
281 | (void)write(kmem, (char *)&onoff, sizeof (onoff)); | |
d841a9ba KM |
282 | } |
283 | ||
284 | kfetch(index) | |
285 | int index; | |
286 | { | |
287 | off_t off; | |
288 | int value; | |
289 | ||
290 | if ((off = nl[index].n_value) == 0) { | |
291 | printf("%s: not defined in kernel\n", nl[index].n_name); | |
01538592 | 292 | exit(11); |
d841a9ba | 293 | } |
769cbf71 | 294 | if (klseek(kmem, off, L_SET) == -1) { |
d841a9ba | 295 | perror("lseek"); |
01538592 | 296 | exit(12); |
d841a9ba KM |
297 | } |
298 | if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) { | |
299 | perror("read"); | |
01538592 | 300 | exit(13); |
d841a9ba KM |
301 | } |
302 | return (value); | |
303 | } | |
304 | ||
4d32c205 | 305 | off_t |
d841a9ba | 306 | klseek(fd, base, off) |
4d32c205 KB |
307 | int fd, off; |
308 | off_t base; | |
d841a9ba | 309 | { |
4d32c205 KB |
310 | if (kflag) { /* get kernel pte */ |
311 | base &= ~KERNBASE; | |
312 | base = ctob(Sysmap[btop(base)].pg_pfnum) + (base & PGOFSET); | |
d841a9ba KM |
313 | } |
314 | return (lseek(fd, base, off)); | |
315 | } |