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528b0614 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
d841a9ba | 13 | #ifndef lint |
528b0614 DF |
14 | static char sccsid[] = "@(#)kgmon.c 5.1 (Berkeley) %G%"; |
15 | #endif not lint | |
d841a9ba KM |
16 | |
17 | #include <sys/param.h> | |
01538592 | 18 | #include <machine/pte.h> |
fa7eedc6 | 19 | #include <sys/vm.h> |
d841a9ba KM |
20 | #include <stdio.h> |
21 | #include <nlist.h> | |
22 | #include <ctype.h> | |
78e8943b | 23 | #include <sys/gprof.h> |
d841a9ba KM |
24 | |
25 | #define PROFILING_ON 0 | |
26 | #define PROFILING_OFF 3 | |
27 | ||
28 | /* | |
29 | * froms is actually a bunch of unsigned shorts indexing tos | |
30 | */ | |
31 | u_short *froms; | |
32 | struct tostruct *tos; | |
33 | char *s_lowpc; | |
34 | u_long s_textsize; | |
35 | int ssiz; | |
36 | off_t sbuf; | |
37 | ||
38 | struct nlist nl[] = { | |
39 | #define N_SYSMAP 0 | |
40 | { "_Sysmap" }, | |
41 | #define N_SYSSIZE 1 | |
42 | { "_Syssize" }, | |
43 | #define N_FROMS 2 | |
44 | { "_froms" }, | |
45 | #define N_PROFILING 3 | |
46 | { "_profiling" }, | |
47 | #define N_S_LOWPC 4 | |
48 | { "_s_lowpc" }, | |
49 | #define N_S_TEXTSIZE 5 | |
50 | { "_s_textsize" }, | |
51 | #define N_SBUF 6 | |
52 | { "_sbuf" }, | |
53 | #define N_SSIZ 7 | |
54 | { "_ssiz" }, | |
55 | #define N_TOS 8 | |
56 | { "_tos" }, | |
57 | 0, | |
58 | }; | |
59 | ||
60 | struct pte *Sysmap; | |
61 | ||
62 | char *system = "/vmunix"; | |
63 | char *kmemf = "/dev/kmem"; | |
64 | int kmem; | |
ecc6febd | 65 | int bflag, hflag, kflag, rflag, pflag; |
78e8943b | 66 | int debug = 0; |
d841a9ba KM |
67 | |
68 | main(argc, argv) | |
69 | int argc; | |
70 | char *argv[]; | |
71 | { | |
ecc6febd | 72 | int mode, disp, openmode = 0; |
d841a9ba KM |
73 | |
74 | argc--, argv++; | |
4a1fd57e | 75 | while (argc > 0 && argv[0][0] == '-') { |
78e8943b KM |
76 | switch (argv[0][1]) { |
77 | case 'b': | |
78 | bflag++; | |
ecc6febd | 79 | openmode = 2; |
78e8943b KM |
80 | break; |
81 | case 'h': | |
82 | hflag++; | |
ecc6febd | 83 | openmode = 2; |
78e8943b KM |
84 | break; |
85 | case 'r': | |
86 | rflag++; | |
ecc6febd | 87 | openmode = 2; |
78e8943b | 88 | break; |
ecc6febd KM |
89 | case 'p': |
90 | pflag++; | |
91 | openmode = 2; | |
78e8943b KM |
92 | break; |
93 | default: | |
ecc6febd | 94 | printf("Usage: kgmon [ -b -h -r -p system memory ]\n"); |
78e8943b KM |
95 | exit(1); |
96 | } | |
97 | argc--, argv++; | |
98 | } | |
d841a9ba KM |
99 | if (argc > 0) { |
100 | system = *argv; | |
101 | argv++, argc--; | |
102 | } | |
103 | nlist(system, nl); | |
104 | if (nl[0].n_type == 0) { | |
105 | fprintf(stderr, "%s: no namelist\n", system); | |
01538592 | 106 | exit(2); |
d841a9ba KM |
107 | } |
108 | if (argc > 0) { | |
109 | kmemf = *argv; | |
78e8943b | 110 | kflag++; |
d841a9ba | 111 | } |
ecc6febd | 112 | kmem = open(kmemf, openmode); |
d841a9ba | 113 | if (kmem < 0) { |
ecc6febd KM |
114 | openmode = 0; |
115 | kmem = open(kmemf, openmode); | |
d841a9ba KM |
116 | if (kmem < 0) { |
117 | fprintf(stderr, "cannot open "); | |
118 | perror(kmemf); | |
01538592 | 119 | exit(3); |
d841a9ba | 120 | } |
78e8943b | 121 | fprintf(stderr, "%s opened read-only\n", kmemf); |
78e8943b KM |
122 | if (rflag) |
123 | fprintf(stderr, "-r supressed\n"); | |
124 | if (bflag) | |
125 | fprintf(stderr, "-b supressed\n"); | |
126 | if (hflag) | |
127 | fprintf(stderr, "-h supressed\n"); | |
128 | rflag = 0; | |
129 | bflag = 0; | |
130 | hflag = 0; | |
d841a9ba | 131 | } |
78e8943b | 132 | if (kflag) { |
d841a9ba KM |
133 | off_t off; |
134 | ||
135 | off = nl[N_SYSMAP].n_value & 0x7fffffff; | |
136 | lseek(kmem, off, 0); | |
137 | nl[N_SYSSIZE].n_value *= 4; | |
138 | Sysmap = (struct pte *)malloc(nl[N_SYSSIZE].n_value); | |
139 | if (Sysmap == 0) { | |
140 | perror("Sysmap"); | |
01538592 | 141 | exit(4); |
d841a9ba KM |
142 | } |
143 | read(kmem, Sysmap, nl[N_SYSSIZE].n_value); | |
144 | } | |
79ec4952 | 145 | mode = kfetch(N_PROFILING); |
78e8943b KM |
146 | if (hflag) |
147 | disp = PROFILING_OFF; | |
148 | else if (bflag) | |
149 | disp = PROFILING_ON; | |
150 | else | |
79ec4952 | 151 | disp = mode; |
ecc6febd KM |
152 | if (pflag) { |
153 | if (openmode == 0 && mode == PROFILING_ON) | |
79ec4952 | 154 | fprintf(stderr, "data may be inconsistent\n"); |
78e8943b | 155 | dumpstate(); |
79ec4952 | 156 | } |
78e8943b KM |
157 | if (rflag) |
158 | resetstate(); | |
159 | turnonoff(disp); | |
79ec4952 | 160 | fprintf(stdout, "kernel profiling is %s.\n", disp ? "off" : "running"); |
78e8943b KM |
161 | } |
162 | ||
163 | dumpstate() | |
164 | { | |
165 | int i; | |
166 | int fd; | |
167 | off_t kfroms, ktos; | |
168 | int fromindex, endfrom, fromssize, tossize; | |
169 | u_long frompc; | |
170 | int toindex; | |
171 | struct rawarc rawarc; | |
172 | char buf[BUFSIZ]; | |
173 | ||
d841a9ba KM |
174 | turnonoff(PROFILING_OFF); |
175 | fd = creat("gmon.out", 0666); | |
176 | if (fd < 0) { | |
177 | perror("gmon.out"); | |
178 | return; | |
179 | } | |
180 | ssiz = kfetch(N_SSIZ); | |
181 | sbuf = kfetch(N_SBUF); | |
182 | klseek(kmem, (off_t)sbuf, 0); | |
183 | for (i = ssiz; i > 0; i -= BUFSIZ) { | |
184 | read(kmem, buf, i < BUFSIZ ? i : BUFSIZ); | |
185 | write(fd, buf, i < BUFSIZ ? i : BUFSIZ); | |
186 | } | |
187 | s_textsize = kfetch(N_S_TEXTSIZE); | |
78e8943b KM |
188 | fromssize = s_textsize / HASHFRACTION; |
189 | froms = (u_short *)malloc(fromssize); | |
d841a9ba KM |
190 | kfroms = kfetch(N_FROMS); |
191 | klseek(kmem, kfroms, 0); | |
78e8943b KM |
192 | i = read(kmem, ((char *)(froms)), fromssize); |
193 | if (i != fromssize) { | |
194 | fprintf(stderr, "read froms: request %d, got %d", fromssize, i); | |
195 | perror(""); | |
196 | exit(5); | |
d841a9ba | 197 | } |
78e8943b KM |
198 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
199 | tos = (struct tostruct *)malloc(tossize); | |
d841a9ba KM |
200 | ktos = kfetch(N_TOS); |
201 | klseek(kmem, ktos, 0); | |
78e8943b KM |
202 | i = read(kmem, ((char *)(tos)), tossize); |
203 | if (i != tossize) { | |
204 | fprintf(stderr, "read tos: request %d, got %d", tossize, i); | |
205 | perror(""); | |
206 | exit(6); | |
d841a9ba KM |
207 | } |
208 | s_lowpc = (char *)kfetch(N_S_LOWPC); | |
209 | if (debug) | |
210 | fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n", | |
211 | s_lowpc, s_textsize); | |
78e8943b KM |
212 | endfrom = fromssize / sizeof(*froms); |
213 | for (fromindex = 0; fromindex < endfrom; fromindex++) { | |
d841a9ba KM |
214 | if (froms[fromindex] == 0) |
215 | continue; | |
78e8943b KM |
216 | frompc = (u_long)s_lowpc + |
217 | (fromindex * HASHFRACTION * sizeof(*froms)); | |
d841a9ba KM |
218 | for (toindex = froms[fromindex]; toindex != 0; |
219 | toindex = tos[toindex].link) { | |
220 | if (debug) | |
221 | fprintf(stderr, | |
222 | "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" , | |
223 | frompc, tos[toindex].selfpc, tos[toindex].count); | |
224 | rawarc.raw_frompc = frompc; | |
225 | rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; | |
226 | rawarc.raw_count = tos[toindex].count; | |
227 | write(fd, &rawarc, sizeof (rawarc)); | |
228 | } | |
229 | } | |
230 | close(fd); | |
78e8943b KM |
231 | } |
232 | ||
233 | resetstate() | |
234 | { | |
235 | int i; | |
236 | off_t kfroms, ktos; | |
237 | int fromssize, tossize; | |
238 | char buf[BUFSIZ]; | |
239 | ||
240 | turnonoff(PROFILING_OFF); | |
241 | bzero(buf, BUFSIZ); | |
242 | ssiz = kfetch(N_SSIZ); | |
243 | sbuf = kfetch(N_SBUF); | |
244 | ssiz -= sizeof(struct phdr); | |
245 | sbuf += sizeof(struct phdr); | |
246 | klseek(kmem, (off_t)sbuf, 0); | |
247 | for (i = ssiz; i > 0; i -= BUFSIZ) | |
248 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
249 | perror("sbuf write"); | |
01538592 | 250 | exit(7); |
78e8943b KM |
251 | } |
252 | s_textsize = kfetch(N_S_TEXTSIZE); | |
253 | fromssize = s_textsize / HASHFRACTION; | |
254 | kfroms = kfetch(N_FROMS); | |
255 | klseek(kmem, kfroms, 0); | |
256 | for (i = fromssize; i > 0; i -= BUFSIZ) | |
257 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
258 | perror("kforms write"); | |
01538592 | 259 | exit(8); |
78e8943b KM |
260 | } |
261 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); | |
262 | ktos = kfetch(N_TOS); | |
263 | klseek(kmem, ktos, 0); | |
264 | for (i = tossize; i > 0; i -= BUFSIZ) | |
265 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
266 | perror("ktos write"); | |
01538592 | 267 | exit(9); |
78e8943b | 268 | } |
d841a9ba KM |
269 | } |
270 | ||
271 | turnonoff(onoff) | |
272 | int onoff; | |
273 | { | |
274 | off_t off; | |
275 | ||
276 | if ((off = nl[N_PROFILING].n_value) == 0) { | |
277 | printf("profiling: not defined in kernel\n"); | |
01538592 | 278 | exit(10); |
d841a9ba KM |
279 | } |
280 | klseek(kmem, off, 0); | |
281 | write(kmem, (char *)&onoff, sizeof (onoff)); | |
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 KM |
293 | } |
294 | if (klseek(kmem, off, 0) == -1) { | |
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 | ||
305 | klseek(fd, base, off) | |
306 | int fd, base, off; | |
307 | { | |
308 | ||
78e8943b | 309 | if (kflag) { |
d841a9ba | 310 | /* get kernel pte */ |
fa7eedc6 | 311 | #if vax |
d841a9ba | 312 | base &= 0x7fffffff; |
fa7eedc6 SL |
313 | #endif |
314 | base = ((int)ptob(Sysmap[btop(base)].pg_pfnum))+(base&(NBPG-1)); | |
d841a9ba KM |
315 | } |
316 | return (lseek(fd, base, off)); | |
317 | } |