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d841a9ba KM |
1 | /* Copyright (c) 1982 Regents of the University of California */ |
2 | ||
3 | #ifndef lint | |
ecc6febd | 4 | static char sccsid[] = "@(#)kgmon.c 4.6 83/01/16"; |
d841a9ba KM |
5 | #endif |
6 | ||
7 | #include <sys/param.h> | |
01538592 | 8 | #include <machine/pte.h> |
d841a9ba KM |
9 | #include <stdio.h> |
10 | #include <nlist.h> | |
11 | #include <ctype.h> | |
78e8943b | 12 | #include <sys/gprof.h> |
d841a9ba KM |
13 | |
14 | #define PROFILING_ON 0 | |
15 | #define PROFILING_OFF 3 | |
16 | ||
17 | /* | |
18 | * froms is actually a bunch of unsigned shorts indexing tos | |
19 | */ | |
20 | u_short *froms; | |
21 | struct tostruct *tos; | |
22 | char *s_lowpc; | |
23 | u_long s_textsize; | |
24 | int ssiz; | |
25 | off_t sbuf; | |
26 | ||
27 | struct nlist nl[] = { | |
28 | #define N_SYSMAP 0 | |
29 | { "_Sysmap" }, | |
30 | #define N_SYSSIZE 1 | |
31 | { "_Syssize" }, | |
32 | #define N_FROMS 2 | |
33 | { "_froms" }, | |
34 | #define N_PROFILING 3 | |
35 | { "_profiling" }, | |
36 | #define N_S_LOWPC 4 | |
37 | { "_s_lowpc" }, | |
38 | #define N_S_TEXTSIZE 5 | |
39 | { "_s_textsize" }, | |
40 | #define N_SBUF 6 | |
41 | { "_sbuf" }, | |
42 | #define N_SSIZ 7 | |
43 | { "_ssiz" }, | |
44 | #define N_TOS 8 | |
45 | { "_tos" }, | |
46 | 0, | |
47 | }; | |
48 | ||
49 | struct pte *Sysmap; | |
50 | ||
51 | char *system = "/vmunix"; | |
52 | char *kmemf = "/dev/kmem"; | |
53 | int kmem; | |
ecc6febd | 54 | int bflag, hflag, kflag, rflag, pflag; |
78e8943b | 55 | int debug = 0; |
d841a9ba KM |
56 | |
57 | main(argc, argv) | |
58 | int argc; | |
59 | char *argv[]; | |
60 | { | |
ecc6febd | 61 | int mode, disp, openmode = 0; |
d841a9ba KM |
62 | |
63 | argc--, argv++; | |
78e8943b KM |
64 | while (argv[0][0] == '-') { |
65 | switch (argv[0][1]) { | |
66 | case 'b': | |
67 | bflag++; | |
ecc6febd | 68 | openmode = 2; |
78e8943b KM |
69 | break; |
70 | case 'h': | |
71 | hflag++; | |
ecc6febd | 72 | openmode = 2; |
78e8943b KM |
73 | break; |
74 | case 'r': | |
75 | rflag++; | |
ecc6febd | 76 | openmode = 2; |
78e8943b | 77 | break; |
ecc6febd KM |
78 | case 'p': |
79 | pflag++; | |
80 | openmode = 2; | |
78e8943b KM |
81 | break; |
82 | default: | |
ecc6febd | 83 | printf("Usage: kgmon [ -b -h -r -p system memory ]\n"); |
78e8943b KM |
84 | exit(1); |
85 | } | |
86 | argc--, argv++; | |
87 | } | |
d841a9ba KM |
88 | if (argc > 0) { |
89 | system = *argv; | |
90 | argv++, argc--; | |
91 | } | |
92 | nlist(system, nl); | |
93 | if (nl[0].n_type == 0) { | |
94 | fprintf(stderr, "%s: no namelist\n", system); | |
01538592 | 95 | exit(2); |
d841a9ba KM |
96 | } |
97 | if (argc > 0) { | |
98 | kmemf = *argv; | |
78e8943b | 99 | kflag++; |
d841a9ba | 100 | } |
ecc6febd | 101 | kmem = open(kmemf, openmode); |
d841a9ba | 102 | if (kmem < 0) { |
ecc6febd KM |
103 | openmode = 0; |
104 | kmem = open(kmemf, openmode); | |
d841a9ba KM |
105 | if (kmem < 0) { |
106 | fprintf(stderr, "cannot open "); | |
107 | perror(kmemf); | |
01538592 | 108 | exit(3); |
d841a9ba | 109 | } |
78e8943b | 110 | fprintf(stderr, "%s opened read-only\n", kmemf); |
78e8943b KM |
111 | if (rflag) |
112 | fprintf(stderr, "-r supressed\n"); | |
113 | if (bflag) | |
114 | fprintf(stderr, "-b supressed\n"); | |
115 | if (hflag) | |
116 | fprintf(stderr, "-h supressed\n"); | |
117 | rflag = 0; | |
118 | bflag = 0; | |
119 | hflag = 0; | |
d841a9ba | 120 | } |
78e8943b | 121 | if (kflag) { |
d841a9ba KM |
122 | off_t off; |
123 | ||
124 | off = nl[N_SYSMAP].n_value & 0x7fffffff; | |
125 | lseek(kmem, off, 0); | |
126 | nl[N_SYSSIZE].n_value *= 4; | |
127 | Sysmap = (struct pte *)malloc(nl[N_SYSSIZE].n_value); | |
128 | if (Sysmap == 0) { | |
129 | perror("Sysmap"); | |
01538592 | 130 | exit(4); |
d841a9ba KM |
131 | } |
132 | read(kmem, Sysmap, nl[N_SYSSIZE].n_value); | |
133 | } | |
79ec4952 | 134 | mode = kfetch(N_PROFILING); |
78e8943b KM |
135 | if (hflag) |
136 | disp = PROFILING_OFF; | |
137 | else if (bflag) | |
138 | disp = PROFILING_ON; | |
139 | else | |
79ec4952 | 140 | disp = mode; |
ecc6febd KM |
141 | if (pflag) { |
142 | if (openmode == 0 && mode == PROFILING_ON) | |
79ec4952 | 143 | fprintf(stderr, "data may be inconsistent\n"); |
78e8943b | 144 | dumpstate(); |
79ec4952 | 145 | } |
78e8943b KM |
146 | if (rflag) |
147 | resetstate(); | |
148 | turnonoff(disp); | |
79ec4952 | 149 | fprintf(stdout, "kernel profiling is %s.\n", disp ? "off" : "running"); |
78e8943b KM |
150 | } |
151 | ||
152 | dumpstate() | |
153 | { | |
154 | int i; | |
155 | int fd; | |
156 | off_t kfroms, ktos; | |
157 | int fromindex, endfrom, fromssize, tossize; | |
158 | u_long frompc; | |
159 | int toindex; | |
160 | struct rawarc rawarc; | |
161 | char buf[BUFSIZ]; | |
162 | ||
d841a9ba KM |
163 | turnonoff(PROFILING_OFF); |
164 | fd = creat("gmon.out", 0666); | |
165 | if (fd < 0) { | |
166 | perror("gmon.out"); | |
167 | return; | |
168 | } | |
169 | ssiz = kfetch(N_SSIZ); | |
170 | sbuf = kfetch(N_SBUF); | |
171 | klseek(kmem, (off_t)sbuf, 0); | |
172 | for (i = ssiz; i > 0; i -= BUFSIZ) { | |
173 | read(kmem, buf, i < BUFSIZ ? i : BUFSIZ); | |
174 | write(fd, buf, i < BUFSIZ ? i : BUFSIZ); | |
175 | } | |
176 | s_textsize = kfetch(N_S_TEXTSIZE); | |
78e8943b KM |
177 | fromssize = s_textsize / HASHFRACTION; |
178 | froms = (u_short *)malloc(fromssize); | |
d841a9ba KM |
179 | kfroms = kfetch(N_FROMS); |
180 | klseek(kmem, kfroms, 0); | |
78e8943b KM |
181 | i = read(kmem, ((char *)(froms)), fromssize); |
182 | if (i != fromssize) { | |
183 | fprintf(stderr, "read froms: request %d, got %d", fromssize, i); | |
184 | perror(""); | |
185 | exit(5); | |
d841a9ba | 186 | } |
78e8943b KM |
187 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
188 | tos = (struct tostruct *)malloc(tossize); | |
d841a9ba KM |
189 | ktos = kfetch(N_TOS); |
190 | klseek(kmem, ktos, 0); | |
78e8943b KM |
191 | i = read(kmem, ((char *)(tos)), tossize); |
192 | if (i != tossize) { | |
193 | fprintf(stderr, "read tos: request %d, got %d", tossize, i); | |
194 | perror(""); | |
195 | exit(6); | |
d841a9ba KM |
196 | } |
197 | s_lowpc = (char *)kfetch(N_S_LOWPC); | |
198 | if (debug) | |
199 | fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n", | |
200 | s_lowpc, s_textsize); | |
78e8943b KM |
201 | endfrom = fromssize / sizeof(*froms); |
202 | for (fromindex = 0; fromindex < endfrom; fromindex++) { | |
d841a9ba KM |
203 | if (froms[fromindex] == 0) |
204 | continue; | |
78e8943b KM |
205 | frompc = (u_long)s_lowpc + |
206 | (fromindex * HASHFRACTION * sizeof(*froms)); | |
d841a9ba KM |
207 | for (toindex = froms[fromindex]; toindex != 0; |
208 | toindex = tos[toindex].link) { | |
209 | if (debug) | |
210 | fprintf(stderr, | |
211 | "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" , | |
212 | frompc, tos[toindex].selfpc, tos[toindex].count); | |
213 | rawarc.raw_frompc = frompc; | |
214 | rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; | |
215 | rawarc.raw_count = tos[toindex].count; | |
216 | write(fd, &rawarc, sizeof (rawarc)); | |
217 | } | |
218 | } | |
219 | close(fd); | |
78e8943b KM |
220 | } |
221 | ||
222 | resetstate() | |
223 | { | |
224 | int i; | |
225 | off_t kfroms, ktos; | |
226 | int fromssize, tossize; | |
227 | char buf[BUFSIZ]; | |
228 | ||
229 | turnonoff(PROFILING_OFF); | |
230 | bzero(buf, BUFSIZ); | |
231 | ssiz = kfetch(N_SSIZ); | |
232 | sbuf = kfetch(N_SBUF); | |
233 | ssiz -= sizeof(struct phdr); | |
234 | sbuf += sizeof(struct phdr); | |
235 | klseek(kmem, (off_t)sbuf, 0); | |
236 | for (i = ssiz; i > 0; i -= BUFSIZ) | |
237 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
238 | perror("sbuf write"); | |
01538592 | 239 | exit(7); |
78e8943b KM |
240 | } |
241 | s_textsize = kfetch(N_S_TEXTSIZE); | |
242 | fromssize = s_textsize / HASHFRACTION; | |
243 | kfroms = kfetch(N_FROMS); | |
244 | klseek(kmem, kfroms, 0); | |
245 | for (i = fromssize; i > 0; i -= BUFSIZ) | |
246 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
247 | perror("kforms write"); | |
01538592 | 248 | exit(8); |
78e8943b KM |
249 | } |
250 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); | |
251 | ktos = kfetch(N_TOS); | |
252 | klseek(kmem, ktos, 0); | |
253 | for (i = tossize; i > 0; i -= BUFSIZ) | |
254 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
255 | perror("ktos write"); | |
01538592 | 256 | exit(9); |
78e8943b | 257 | } |
d841a9ba KM |
258 | } |
259 | ||
260 | turnonoff(onoff) | |
261 | int onoff; | |
262 | { | |
263 | off_t off; | |
264 | ||
265 | if ((off = nl[N_PROFILING].n_value) == 0) { | |
266 | printf("profiling: not defined in kernel\n"); | |
01538592 | 267 | exit(10); |
d841a9ba KM |
268 | } |
269 | klseek(kmem, off, 0); | |
270 | write(kmem, (char *)&onoff, sizeof (onoff)); | |
271 | } | |
272 | ||
273 | kfetch(index) | |
274 | int index; | |
275 | { | |
276 | off_t off; | |
277 | int value; | |
278 | ||
279 | if ((off = nl[index].n_value) == 0) { | |
280 | printf("%s: not defined in kernel\n", nl[index].n_name); | |
01538592 | 281 | exit(11); |
d841a9ba KM |
282 | } |
283 | if (klseek(kmem, off, 0) == -1) { | |
284 | perror("lseek"); | |
01538592 | 285 | exit(12); |
d841a9ba KM |
286 | } |
287 | if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) { | |
288 | perror("read"); | |
01538592 | 289 | exit(13); |
d841a9ba KM |
290 | } |
291 | return (value); | |
292 | } | |
293 | ||
294 | klseek(fd, base, off) | |
295 | int fd, base, off; | |
296 | { | |
297 | ||
78e8943b | 298 | if (kflag) { |
d841a9ba KM |
299 | /* get kernel pte */ |
300 | base &= 0x7fffffff; | |
301 | base = Sysmap[base >> 9].pg_pfnum * 512 + (base & 0x1ff); | |
302 | } | |
303 | return (lseek(fd, base, off)); | |
304 | } |