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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 |
769cbf71 | 14 | static char sccsid[] = "@(#)kgmon.c 5.2 (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 | |
64 | ||
d841a9ba KM |
65 | struct pte *Sysmap; |
66 | ||
67 | char *system = "/vmunix"; | |
68 | char *kmemf = "/dev/kmem"; | |
69 | int kmem; | |
ecc6febd | 70 | int bflag, hflag, kflag, rflag, pflag; |
78e8943b | 71 | int debug = 0; |
d841a9ba KM |
72 | |
73 | main(argc, argv) | |
74 | int argc; | |
75 | char *argv[]; | |
76 | { | |
769cbf71 | 77 | int mode, disp, openmode = O_RDONLY; |
d841a9ba KM |
78 | |
79 | argc--, argv++; | |
4a1fd57e | 80 | while (argc > 0 && argv[0][0] == '-') { |
78e8943b KM |
81 | switch (argv[0][1]) { |
82 | case 'b': | |
83 | bflag++; | |
769cbf71 | 84 | openmode = O_RDWR; |
78e8943b KM |
85 | break; |
86 | case 'h': | |
87 | hflag++; | |
769cbf71 | 88 | openmode = O_RDWR; |
78e8943b KM |
89 | break; |
90 | case 'r': | |
91 | rflag++; | |
769cbf71 | 92 | openmode = O_RDWR; |
78e8943b | 93 | break; |
ecc6febd KM |
94 | case 'p': |
95 | pflag++; | |
769cbf71 | 96 | openmode = O_RDWR; |
78e8943b KM |
97 | break; |
98 | default: | |
ecc6febd | 99 | printf("Usage: kgmon [ -b -h -r -p system memory ]\n"); |
78e8943b KM |
100 | exit(1); |
101 | } | |
102 | argc--, argv++; | |
103 | } | |
d841a9ba KM |
104 | if (argc > 0) { |
105 | system = *argv; | |
106 | argv++, argc--; | |
107 | } | |
108 | nlist(system, nl); | |
109 | if (nl[0].n_type == 0) { | |
110 | fprintf(stderr, "%s: no namelist\n", system); | |
01538592 | 111 | exit(2); |
d841a9ba KM |
112 | } |
113 | if (argc > 0) { | |
114 | kmemf = *argv; | |
78e8943b | 115 | kflag++; |
d841a9ba | 116 | } |
ecc6febd | 117 | kmem = open(kmemf, openmode); |
d841a9ba | 118 | if (kmem < 0) { |
769cbf71 | 119 | openmode = O_RDONLY; |
ecc6febd | 120 | kmem = open(kmemf, openmode); |
d841a9ba KM |
121 | if (kmem < 0) { |
122 | fprintf(stderr, "cannot open "); | |
123 | perror(kmemf); | |
01538592 | 124 | exit(3); |
d841a9ba | 125 | } |
78e8943b | 126 | fprintf(stderr, "%s opened read-only\n", kmemf); |
78e8943b KM |
127 | if (rflag) |
128 | fprintf(stderr, "-r supressed\n"); | |
129 | if (bflag) | |
130 | fprintf(stderr, "-b supressed\n"); | |
131 | if (hflag) | |
132 | fprintf(stderr, "-h supressed\n"); | |
133 | rflag = 0; | |
134 | bflag = 0; | |
135 | hflag = 0; | |
d841a9ba | 136 | } |
78e8943b | 137 | if (kflag) { |
d841a9ba KM |
138 | off_t off; |
139 | ||
769cbf71 SL |
140 | off = clear(nl[N_SYSMAP].n_value); |
141 | lseek(kmem, off, L_SET); | |
d841a9ba KM |
142 | nl[N_SYSSIZE].n_value *= 4; |
143 | Sysmap = (struct pte *)malloc(nl[N_SYSSIZE].n_value); | |
144 | if (Sysmap == 0) { | |
145 | perror("Sysmap"); | |
01538592 | 146 | exit(4); |
d841a9ba KM |
147 | } |
148 | read(kmem, Sysmap, nl[N_SYSSIZE].n_value); | |
149 | } | |
79ec4952 | 150 | mode = kfetch(N_PROFILING); |
78e8943b KM |
151 | if (hflag) |
152 | disp = PROFILING_OFF; | |
153 | else if (bflag) | |
154 | disp = PROFILING_ON; | |
155 | else | |
79ec4952 | 156 | disp = mode; |
ecc6febd | 157 | if (pflag) { |
769cbf71 | 158 | if (openmode == O_RDONLY && mode == PROFILING_ON) |
79ec4952 | 159 | fprintf(stderr, "data may be inconsistent\n"); |
78e8943b | 160 | dumpstate(); |
79ec4952 | 161 | } |
78e8943b KM |
162 | if (rflag) |
163 | resetstate(); | |
164 | turnonoff(disp); | |
79ec4952 | 165 | fprintf(stdout, "kernel profiling is %s.\n", disp ? "off" : "running"); |
78e8943b KM |
166 | } |
167 | ||
168 | dumpstate() | |
169 | { | |
170 | int i; | |
171 | int fd; | |
172 | off_t kfroms, ktos; | |
173 | int fromindex, endfrom, fromssize, tossize; | |
174 | u_long frompc; | |
175 | int toindex; | |
176 | struct rawarc rawarc; | |
177 | char buf[BUFSIZ]; | |
178 | ||
d841a9ba KM |
179 | turnonoff(PROFILING_OFF); |
180 | fd = creat("gmon.out", 0666); | |
181 | if (fd < 0) { | |
182 | perror("gmon.out"); | |
183 | return; | |
184 | } | |
185 | ssiz = kfetch(N_SSIZ); | |
186 | sbuf = kfetch(N_SBUF); | |
769cbf71 | 187 | klseek(kmem, (off_t)sbuf, L_SET); |
d841a9ba KM |
188 | for (i = ssiz; i > 0; i -= BUFSIZ) { |
189 | read(kmem, buf, i < BUFSIZ ? i : BUFSIZ); | |
190 | write(fd, buf, i < BUFSIZ ? i : BUFSIZ); | |
191 | } | |
192 | s_textsize = kfetch(N_S_TEXTSIZE); | |
78e8943b KM |
193 | fromssize = s_textsize / HASHFRACTION; |
194 | froms = (u_short *)malloc(fromssize); | |
d841a9ba | 195 | kfroms = kfetch(N_FROMS); |
769cbf71 | 196 | klseek(kmem, kfroms, L_SET); |
78e8943b KM |
197 | i = read(kmem, ((char *)(froms)), fromssize); |
198 | if (i != fromssize) { | |
199 | fprintf(stderr, "read froms: request %d, got %d", fromssize, i); | |
200 | perror(""); | |
201 | exit(5); | |
d841a9ba | 202 | } |
78e8943b KM |
203 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
204 | tos = (struct tostruct *)malloc(tossize); | |
d841a9ba | 205 | ktos = kfetch(N_TOS); |
769cbf71 | 206 | klseek(kmem, ktos, L_SET); |
78e8943b KM |
207 | i = read(kmem, ((char *)(tos)), tossize); |
208 | if (i != tossize) { | |
209 | fprintf(stderr, "read tos: request %d, got %d", tossize, i); | |
210 | perror(""); | |
211 | exit(6); | |
d841a9ba KM |
212 | } |
213 | s_lowpc = (char *)kfetch(N_S_LOWPC); | |
214 | if (debug) | |
215 | fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n", | |
216 | s_lowpc, s_textsize); | |
78e8943b KM |
217 | endfrom = fromssize / sizeof(*froms); |
218 | for (fromindex = 0; fromindex < endfrom; fromindex++) { | |
d841a9ba KM |
219 | if (froms[fromindex] == 0) |
220 | continue; | |
78e8943b KM |
221 | frompc = (u_long)s_lowpc + |
222 | (fromindex * HASHFRACTION * sizeof(*froms)); | |
d841a9ba KM |
223 | for (toindex = froms[fromindex]; toindex != 0; |
224 | toindex = tos[toindex].link) { | |
225 | if (debug) | |
226 | fprintf(stderr, | |
227 | "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" , | |
228 | frompc, tos[toindex].selfpc, tos[toindex].count); | |
229 | rawarc.raw_frompc = frompc; | |
230 | rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; | |
231 | rawarc.raw_count = tos[toindex].count; | |
232 | write(fd, &rawarc, sizeof (rawarc)); | |
233 | } | |
234 | } | |
235 | close(fd); | |
78e8943b KM |
236 | } |
237 | ||
238 | resetstate() | |
239 | { | |
240 | int i; | |
241 | off_t kfroms, ktos; | |
242 | int fromssize, tossize; | |
243 | char buf[BUFSIZ]; | |
244 | ||
245 | turnonoff(PROFILING_OFF); | |
246 | bzero(buf, BUFSIZ); | |
247 | ssiz = kfetch(N_SSIZ); | |
248 | sbuf = kfetch(N_SBUF); | |
249 | ssiz -= sizeof(struct phdr); | |
250 | sbuf += sizeof(struct phdr); | |
769cbf71 | 251 | klseek(kmem, (off_t)sbuf, L_SET); |
78e8943b KM |
252 | for (i = ssiz; i > 0; i -= BUFSIZ) |
253 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
254 | perror("sbuf write"); | |
01538592 | 255 | exit(7); |
78e8943b KM |
256 | } |
257 | s_textsize = kfetch(N_S_TEXTSIZE); | |
258 | fromssize = s_textsize / HASHFRACTION; | |
259 | kfroms = kfetch(N_FROMS); | |
769cbf71 | 260 | klseek(kmem, kfroms, L_SET); |
78e8943b KM |
261 | for (i = fromssize; i > 0; i -= BUFSIZ) |
262 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
263 | perror("kforms write"); | |
01538592 | 264 | exit(8); |
78e8943b KM |
265 | } |
266 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); | |
267 | ktos = kfetch(N_TOS); | |
769cbf71 | 268 | klseek(kmem, ktos, L_SET); |
78e8943b KM |
269 | for (i = tossize; i > 0; i -= BUFSIZ) |
270 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
271 | perror("ktos write"); | |
01538592 | 272 | exit(9); |
78e8943b | 273 | } |
d841a9ba KM |
274 | } |
275 | ||
276 | turnonoff(onoff) | |
277 | int onoff; | |
278 | { | |
279 | off_t off; | |
280 | ||
281 | if ((off = nl[N_PROFILING].n_value) == 0) { | |
282 | printf("profiling: not defined in kernel\n"); | |
01538592 | 283 | exit(10); |
d841a9ba | 284 | } |
769cbf71 | 285 | klseek(kmem, off, L_SET); |
d841a9ba KM |
286 | write(kmem, (char *)&onoff, sizeof (onoff)); |
287 | } | |
288 | ||
289 | kfetch(index) | |
290 | int index; | |
291 | { | |
292 | off_t off; | |
293 | int value; | |
294 | ||
295 | if ((off = nl[index].n_value) == 0) { | |
296 | printf("%s: not defined in kernel\n", nl[index].n_name); | |
01538592 | 297 | exit(11); |
d841a9ba | 298 | } |
769cbf71 | 299 | if (klseek(kmem, off, L_SET) == -1) { |
d841a9ba | 300 | perror("lseek"); |
01538592 | 301 | exit(12); |
d841a9ba KM |
302 | } |
303 | if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) { | |
304 | perror("read"); | |
01538592 | 305 | exit(13); |
d841a9ba KM |
306 | } |
307 | return (value); | |
308 | } | |
309 | ||
310 | klseek(fd, base, off) | |
311 | int fd, base, off; | |
312 | { | |
313 | ||
78e8943b | 314 | if (kflag) { |
d841a9ba | 315 | /* get kernel pte */ |
769cbf71 | 316 | base = clear(base); |
fa7eedc6 | 317 | base = ((int)ptob(Sysmap[btop(base)].pg_pfnum))+(base&(NBPG-1)); |
d841a9ba KM |
318 | } |
319 | return (lseek(fd, base, off)); | |
320 | } |