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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 |
64e8af8f | 14 | static char sccsid[] = "@(#)kgmon.c 5.3 (Berkeley) %G%"; |
528b0614 | 15 | #endif not lint |
d841a9ba KM |
16 | |
17 | #include <sys/param.h> | |
01538592 | 18 | #include <machine/pte.h> |
769cbf71 | 19 | #include <sys/file.h> |
fa7eedc6 | 20 | #include <sys/vm.h> |
d841a9ba KM |
21 | #include <stdio.h> |
22 | #include <nlist.h> | |
23 | #include <ctype.h> | |
78e8943b | 24 | #include <sys/gprof.h> |
d841a9ba KM |
25 | |
26 | #define PROFILING_ON 0 | |
27 | #define PROFILING_OFF 3 | |
28 | ||
29 | /* | |
30 | * froms is actually a bunch of unsigned shorts indexing tos | |
31 | */ | |
32 | u_short *froms; | |
33 | struct tostruct *tos; | |
34 | char *s_lowpc; | |
35 | u_long s_textsize; | |
36 | int ssiz; | |
37 | off_t sbuf; | |
38 | ||
39 | struct nlist nl[] = { | |
40 | #define N_SYSMAP 0 | |
41 | { "_Sysmap" }, | |
42 | #define N_SYSSIZE 1 | |
43 | { "_Syssize" }, | |
44 | #define N_FROMS 2 | |
45 | { "_froms" }, | |
46 | #define N_PROFILING 3 | |
47 | { "_profiling" }, | |
48 | #define N_S_LOWPC 4 | |
49 | { "_s_lowpc" }, | |
50 | #define N_S_TEXTSIZE 5 | |
51 | { "_s_textsize" }, | |
52 | #define N_SBUF 6 | |
53 | { "_sbuf" }, | |
54 | #define N_SSIZ 7 | |
55 | { "_ssiz" }, | |
56 | #define N_TOS 8 | |
57 | { "_tos" }, | |
58 | 0, | |
59 | }; | |
60 | ||
769cbf71 SL |
61 | #if defined(vax) |
62 | #define clear(x) ((x) &~ 0x80000000) | |
63 | #endif | |
64e8af8f SL |
64 | #if defined(tahoe) |
65 | #define clear(x) ((x) &~ 0xc0000000) | |
66 | #endif | |
769cbf71 | 67 | |
d841a9ba KM |
68 | struct pte *Sysmap; |
69 | ||
70 | char *system = "/vmunix"; | |
71 | char *kmemf = "/dev/kmem"; | |
72 | int kmem; | |
ecc6febd | 73 | int bflag, hflag, kflag, rflag, pflag; |
78e8943b | 74 | int debug = 0; |
d841a9ba KM |
75 | |
76 | main(argc, argv) | |
77 | int argc; | |
78 | char *argv[]; | |
79 | { | |
769cbf71 | 80 | int mode, disp, openmode = O_RDONLY; |
d841a9ba KM |
81 | |
82 | argc--, argv++; | |
4a1fd57e | 83 | while (argc > 0 && argv[0][0] == '-') { |
78e8943b KM |
84 | switch (argv[0][1]) { |
85 | case 'b': | |
86 | bflag++; | |
769cbf71 | 87 | openmode = O_RDWR; |
78e8943b KM |
88 | break; |
89 | case 'h': | |
90 | hflag++; | |
769cbf71 | 91 | openmode = O_RDWR; |
78e8943b KM |
92 | break; |
93 | case 'r': | |
94 | rflag++; | |
769cbf71 | 95 | openmode = O_RDWR; |
78e8943b | 96 | break; |
ecc6febd KM |
97 | case 'p': |
98 | pflag++; | |
769cbf71 | 99 | openmode = O_RDWR; |
78e8943b KM |
100 | break; |
101 | default: | |
ecc6febd | 102 | printf("Usage: kgmon [ -b -h -r -p system memory ]\n"); |
78e8943b KM |
103 | exit(1); |
104 | } | |
105 | argc--, argv++; | |
106 | } | |
d841a9ba KM |
107 | if (argc > 0) { |
108 | system = *argv; | |
109 | argv++, argc--; | |
110 | } | |
111 | nlist(system, nl); | |
112 | if (nl[0].n_type == 0) { | |
113 | fprintf(stderr, "%s: no namelist\n", system); | |
01538592 | 114 | exit(2); |
d841a9ba KM |
115 | } |
116 | if (argc > 0) { | |
117 | kmemf = *argv; | |
78e8943b | 118 | kflag++; |
d841a9ba | 119 | } |
ecc6febd | 120 | kmem = open(kmemf, openmode); |
d841a9ba | 121 | if (kmem < 0) { |
769cbf71 | 122 | openmode = O_RDONLY; |
ecc6febd | 123 | kmem = open(kmemf, openmode); |
d841a9ba KM |
124 | if (kmem < 0) { |
125 | fprintf(stderr, "cannot open "); | |
126 | perror(kmemf); | |
01538592 | 127 | exit(3); |
d841a9ba | 128 | } |
78e8943b | 129 | fprintf(stderr, "%s opened read-only\n", kmemf); |
78e8943b KM |
130 | if (rflag) |
131 | fprintf(stderr, "-r supressed\n"); | |
132 | if (bflag) | |
133 | fprintf(stderr, "-b supressed\n"); | |
134 | if (hflag) | |
135 | fprintf(stderr, "-h supressed\n"); | |
136 | rflag = 0; | |
137 | bflag = 0; | |
138 | hflag = 0; | |
d841a9ba | 139 | } |
78e8943b | 140 | if (kflag) { |
d841a9ba KM |
141 | off_t off; |
142 | ||
769cbf71 SL |
143 | off = clear(nl[N_SYSMAP].n_value); |
144 | lseek(kmem, off, L_SET); | |
d841a9ba KM |
145 | nl[N_SYSSIZE].n_value *= 4; |
146 | Sysmap = (struct pte *)malloc(nl[N_SYSSIZE].n_value); | |
147 | if (Sysmap == 0) { | |
148 | perror("Sysmap"); | |
01538592 | 149 | exit(4); |
d841a9ba KM |
150 | } |
151 | read(kmem, Sysmap, nl[N_SYSSIZE].n_value); | |
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 | { | |
173 | int i; | |
174 | int fd; | |
175 | off_t kfroms, ktos; | |
176 | int fromindex, endfrom, fromssize, tossize; | |
177 | u_long frompc; | |
178 | int toindex; | |
179 | struct rawarc rawarc; | |
180 | char buf[BUFSIZ]; | |
181 | ||
d841a9ba KM |
182 | turnonoff(PROFILING_OFF); |
183 | fd = creat("gmon.out", 0666); | |
184 | if (fd < 0) { | |
185 | perror("gmon.out"); | |
186 | return; | |
187 | } | |
188 | ssiz = kfetch(N_SSIZ); | |
189 | sbuf = kfetch(N_SBUF); | |
769cbf71 | 190 | klseek(kmem, (off_t)sbuf, L_SET); |
d841a9ba KM |
191 | for (i = ssiz; i > 0; i -= BUFSIZ) { |
192 | read(kmem, buf, i < BUFSIZ ? i : BUFSIZ); | |
193 | write(fd, buf, i < BUFSIZ ? i : BUFSIZ); | |
194 | } | |
195 | s_textsize = kfetch(N_S_TEXTSIZE); | |
78e8943b KM |
196 | fromssize = s_textsize / HASHFRACTION; |
197 | froms = (u_short *)malloc(fromssize); | |
d841a9ba | 198 | kfroms = kfetch(N_FROMS); |
769cbf71 | 199 | klseek(kmem, kfroms, L_SET); |
78e8943b KM |
200 | i = read(kmem, ((char *)(froms)), fromssize); |
201 | if (i != fromssize) { | |
202 | fprintf(stderr, "read froms: request %d, got %d", fromssize, i); | |
203 | perror(""); | |
204 | exit(5); | |
d841a9ba | 205 | } |
78e8943b KM |
206 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
207 | tos = (struct tostruct *)malloc(tossize); | |
d841a9ba | 208 | ktos = kfetch(N_TOS); |
769cbf71 | 209 | klseek(kmem, ktos, L_SET); |
78e8943b KM |
210 | i = read(kmem, ((char *)(tos)), tossize); |
211 | if (i != tossize) { | |
212 | fprintf(stderr, "read tos: request %d, got %d", tossize, i); | |
213 | perror(""); | |
214 | exit(6); | |
d841a9ba KM |
215 | } |
216 | s_lowpc = (char *)kfetch(N_S_LOWPC); | |
217 | if (debug) | |
218 | fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n", | |
219 | s_lowpc, s_textsize); | |
78e8943b KM |
220 | endfrom = fromssize / sizeof(*froms); |
221 | for (fromindex = 0; fromindex < endfrom; fromindex++) { | |
d841a9ba KM |
222 | if (froms[fromindex] == 0) |
223 | continue; | |
78e8943b KM |
224 | frompc = (u_long)s_lowpc + |
225 | (fromindex * HASHFRACTION * sizeof(*froms)); | |
d841a9ba KM |
226 | for (toindex = froms[fromindex]; toindex != 0; |
227 | toindex = tos[toindex].link) { | |
228 | if (debug) | |
229 | fprintf(stderr, | |
230 | "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" , | |
231 | frompc, tos[toindex].selfpc, tos[toindex].count); | |
232 | rawarc.raw_frompc = frompc; | |
233 | rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; | |
234 | rawarc.raw_count = tos[toindex].count; | |
235 | write(fd, &rawarc, sizeof (rawarc)); | |
236 | } | |
237 | } | |
238 | close(fd); | |
78e8943b KM |
239 | } |
240 | ||
241 | resetstate() | |
242 | { | |
243 | int i; | |
244 | off_t kfroms, ktos; | |
245 | int fromssize, tossize; | |
246 | char buf[BUFSIZ]; | |
247 | ||
248 | turnonoff(PROFILING_OFF); | |
249 | bzero(buf, BUFSIZ); | |
250 | ssiz = kfetch(N_SSIZ); | |
251 | sbuf = kfetch(N_SBUF); | |
252 | ssiz -= sizeof(struct phdr); | |
253 | sbuf += sizeof(struct phdr); | |
769cbf71 | 254 | klseek(kmem, (off_t)sbuf, L_SET); |
78e8943b KM |
255 | for (i = ssiz; i > 0; i -= BUFSIZ) |
256 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
257 | perror("sbuf write"); | |
01538592 | 258 | exit(7); |
78e8943b KM |
259 | } |
260 | s_textsize = kfetch(N_S_TEXTSIZE); | |
261 | fromssize = s_textsize / HASHFRACTION; | |
262 | kfroms = kfetch(N_FROMS); | |
769cbf71 | 263 | klseek(kmem, kfroms, L_SET); |
78e8943b KM |
264 | for (i = fromssize; i > 0; i -= BUFSIZ) |
265 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
266 | perror("kforms write"); | |
01538592 | 267 | exit(8); |
78e8943b KM |
268 | } |
269 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); | |
270 | ktos = kfetch(N_TOS); | |
769cbf71 | 271 | klseek(kmem, ktos, L_SET); |
78e8943b KM |
272 | for (i = tossize; i > 0; i -= BUFSIZ) |
273 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
274 | perror("ktos write"); | |
01538592 | 275 | exit(9); |
78e8943b | 276 | } |
d841a9ba KM |
277 | } |
278 | ||
279 | turnonoff(onoff) | |
280 | int onoff; | |
281 | { | |
282 | off_t off; | |
283 | ||
284 | if ((off = nl[N_PROFILING].n_value) == 0) { | |
285 | printf("profiling: not defined in kernel\n"); | |
01538592 | 286 | exit(10); |
d841a9ba | 287 | } |
769cbf71 | 288 | klseek(kmem, off, L_SET); |
d841a9ba KM |
289 | write(kmem, (char *)&onoff, sizeof (onoff)); |
290 | } | |
291 | ||
292 | kfetch(index) | |
293 | int index; | |
294 | { | |
295 | off_t off; | |
296 | int value; | |
297 | ||
298 | if ((off = nl[index].n_value) == 0) { | |
299 | printf("%s: not defined in kernel\n", nl[index].n_name); | |
01538592 | 300 | exit(11); |
d841a9ba | 301 | } |
769cbf71 | 302 | if (klseek(kmem, off, L_SET) == -1) { |
d841a9ba | 303 | perror("lseek"); |
01538592 | 304 | exit(12); |
d841a9ba KM |
305 | } |
306 | if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) { | |
307 | perror("read"); | |
01538592 | 308 | exit(13); |
d841a9ba KM |
309 | } |
310 | return (value); | |
311 | } | |
312 | ||
313 | klseek(fd, base, off) | |
314 | int fd, base, off; | |
315 | { | |
316 | ||
78e8943b | 317 | if (kflag) { |
d841a9ba | 318 | /* get kernel pte */ |
769cbf71 | 319 | base = clear(base); |
fa7eedc6 | 320 | base = ((int)ptob(Sysmap[btop(base)].pg_pfnum))+(base&(NBPG-1)); |
d841a9ba KM |
321 | } |
322 | return (lseek(fd, base, off)); | |
323 | } |