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d841a9ba KM |
1 | /* Copyright (c) 1982 Regents of the University of California */ |
2 | ||
3 | #ifndef lint | |
fa7eedc6 | 4 | static char sccsid[] = "@(#)kgmon.c 4.7 83/03/10"; |
d841a9ba KM |
5 | #endif |
6 | ||
7 | #include <sys/param.h> | |
01538592 | 8 | #include <machine/pte.h> |
fa7eedc6 | 9 | #include <sys/vm.h> |
d841a9ba KM |
10 | #include <stdio.h> |
11 | #include <nlist.h> | |
12 | #include <ctype.h> | |
78e8943b | 13 | #include <sys/gprof.h> |
d841a9ba KM |
14 | |
15 | #define PROFILING_ON 0 | |
16 | #define PROFILING_OFF 3 | |
17 | ||
18 | /* | |
19 | * froms is actually a bunch of unsigned shorts indexing tos | |
20 | */ | |
21 | u_short *froms; | |
22 | struct tostruct *tos; | |
23 | char *s_lowpc; | |
24 | u_long s_textsize; | |
25 | int ssiz; | |
26 | off_t sbuf; | |
27 | ||
28 | struct nlist nl[] = { | |
29 | #define N_SYSMAP 0 | |
30 | { "_Sysmap" }, | |
31 | #define N_SYSSIZE 1 | |
32 | { "_Syssize" }, | |
33 | #define N_FROMS 2 | |
34 | { "_froms" }, | |
35 | #define N_PROFILING 3 | |
36 | { "_profiling" }, | |
37 | #define N_S_LOWPC 4 | |
38 | { "_s_lowpc" }, | |
39 | #define N_S_TEXTSIZE 5 | |
40 | { "_s_textsize" }, | |
41 | #define N_SBUF 6 | |
42 | { "_sbuf" }, | |
43 | #define N_SSIZ 7 | |
44 | { "_ssiz" }, | |
45 | #define N_TOS 8 | |
46 | { "_tos" }, | |
47 | 0, | |
48 | }; | |
49 | ||
50 | struct pte *Sysmap; | |
51 | ||
52 | char *system = "/vmunix"; | |
53 | char *kmemf = "/dev/kmem"; | |
54 | int kmem; | |
ecc6febd | 55 | int bflag, hflag, kflag, rflag, pflag; |
78e8943b | 56 | int debug = 0; |
d841a9ba KM |
57 | |
58 | main(argc, argv) | |
59 | int argc; | |
60 | char *argv[]; | |
61 | { | |
ecc6febd | 62 | int mode, disp, openmode = 0; |
d841a9ba KM |
63 | |
64 | argc--, argv++; | |
78e8943b KM |
65 | while (argv[0][0] == '-') { |
66 | switch (argv[0][1]) { | |
67 | case 'b': | |
68 | bflag++; | |
ecc6febd | 69 | openmode = 2; |
78e8943b KM |
70 | break; |
71 | case 'h': | |
72 | hflag++; | |
ecc6febd | 73 | openmode = 2; |
78e8943b KM |
74 | break; |
75 | case 'r': | |
76 | rflag++; | |
ecc6febd | 77 | openmode = 2; |
78e8943b | 78 | break; |
ecc6febd KM |
79 | case 'p': |
80 | pflag++; | |
81 | openmode = 2; | |
78e8943b KM |
82 | break; |
83 | default: | |
ecc6febd | 84 | printf("Usage: kgmon [ -b -h -r -p system memory ]\n"); |
78e8943b KM |
85 | exit(1); |
86 | } | |
87 | argc--, argv++; | |
88 | } | |
d841a9ba KM |
89 | if (argc > 0) { |
90 | system = *argv; | |
91 | argv++, argc--; | |
92 | } | |
93 | nlist(system, nl); | |
94 | if (nl[0].n_type == 0) { | |
95 | fprintf(stderr, "%s: no namelist\n", system); | |
01538592 | 96 | exit(2); |
d841a9ba KM |
97 | } |
98 | if (argc > 0) { | |
99 | kmemf = *argv; | |
78e8943b | 100 | kflag++; |
d841a9ba | 101 | } |
ecc6febd | 102 | kmem = open(kmemf, openmode); |
d841a9ba | 103 | if (kmem < 0) { |
ecc6febd KM |
104 | openmode = 0; |
105 | kmem = open(kmemf, openmode); | |
d841a9ba KM |
106 | if (kmem < 0) { |
107 | fprintf(stderr, "cannot open "); | |
108 | perror(kmemf); | |
01538592 | 109 | exit(3); |
d841a9ba | 110 | } |
78e8943b | 111 | fprintf(stderr, "%s opened read-only\n", kmemf); |
78e8943b KM |
112 | if (rflag) |
113 | fprintf(stderr, "-r supressed\n"); | |
114 | if (bflag) | |
115 | fprintf(stderr, "-b supressed\n"); | |
116 | if (hflag) | |
117 | fprintf(stderr, "-h supressed\n"); | |
118 | rflag = 0; | |
119 | bflag = 0; | |
120 | hflag = 0; | |
d841a9ba | 121 | } |
78e8943b | 122 | if (kflag) { |
d841a9ba KM |
123 | off_t off; |
124 | ||
125 | off = nl[N_SYSMAP].n_value & 0x7fffffff; | |
126 | lseek(kmem, off, 0); | |
127 | nl[N_SYSSIZE].n_value *= 4; | |
128 | Sysmap = (struct pte *)malloc(nl[N_SYSSIZE].n_value); | |
129 | if (Sysmap == 0) { | |
130 | perror("Sysmap"); | |
01538592 | 131 | exit(4); |
d841a9ba KM |
132 | } |
133 | read(kmem, Sysmap, nl[N_SYSSIZE].n_value); | |
134 | } | |
79ec4952 | 135 | mode = kfetch(N_PROFILING); |
78e8943b KM |
136 | if (hflag) |
137 | disp = PROFILING_OFF; | |
138 | else if (bflag) | |
139 | disp = PROFILING_ON; | |
140 | else | |
79ec4952 | 141 | disp = mode; |
ecc6febd KM |
142 | if (pflag) { |
143 | if (openmode == 0 && mode == PROFILING_ON) | |
79ec4952 | 144 | fprintf(stderr, "data may be inconsistent\n"); |
78e8943b | 145 | dumpstate(); |
79ec4952 | 146 | } |
78e8943b KM |
147 | if (rflag) |
148 | resetstate(); | |
149 | turnonoff(disp); | |
79ec4952 | 150 | fprintf(stdout, "kernel profiling is %s.\n", disp ? "off" : "running"); |
78e8943b KM |
151 | } |
152 | ||
153 | dumpstate() | |
154 | { | |
155 | int i; | |
156 | int fd; | |
157 | off_t kfroms, ktos; | |
158 | int fromindex, endfrom, fromssize, tossize; | |
159 | u_long frompc; | |
160 | int toindex; | |
161 | struct rawarc rawarc; | |
162 | char buf[BUFSIZ]; | |
163 | ||
d841a9ba KM |
164 | turnonoff(PROFILING_OFF); |
165 | fd = creat("gmon.out", 0666); | |
166 | if (fd < 0) { | |
167 | perror("gmon.out"); | |
168 | return; | |
169 | } | |
170 | ssiz = kfetch(N_SSIZ); | |
171 | sbuf = kfetch(N_SBUF); | |
172 | klseek(kmem, (off_t)sbuf, 0); | |
173 | for (i = ssiz; i > 0; i -= BUFSIZ) { | |
174 | read(kmem, buf, i < BUFSIZ ? i : BUFSIZ); | |
175 | write(fd, buf, i < BUFSIZ ? i : BUFSIZ); | |
176 | } | |
177 | s_textsize = kfetch(N_S_TEXTSIZE); | |
78e8943b KM |
178 | fromssize = s_textsize / HASHFRACTION; |
179 | froms = (u_short *)malloc(fromssize); | |
d841a9ba KM |
180 | kfroms = kfetch(N_FROMS); |
181 | klseek(kmem, kfroms, 0); | |
78e8943b KM |
182 | i = read(kmem, ((char *)(froms)), fromssize); |
183 | if (i != fromssize) { | |
184 | fprintf(stderr, "read froms: request %d, got %d", fromssize, i); | |
185 | perror(""); | |
186 | exit(5); | |
d841a9ba | 187 | } |
78e8943b KM |
188 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
189 | tos = (struct tostruct *)malloc(tossize); | |
d841a9ba KM |
190 | ktos = kfetch(N_TOS); |
191 | klseek(kmem, ktos, 0); | |
78e8943b KM |
192 | i = read(kmem, ((char *)(tos)), tossize); |
193 | if (i != tossize) { | |
194 | fprintf(stderr, "read tos: request %d, got %d", tossize, i); | |
195 | perror(""); | |
196 | exit(6); | |
d841a9ba KM |
197 | } |
198 | s_lowpc = (char *)kfetch(N_S_LOWPC); | |
199 | if (debug) | |
200 | fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n", | |
201 | s_lowpc, s_textsize); | |
78e8943b KM |
202 | endfrom = fromssize / sizeof(*froms); |
203 | for (fromindex = 0; fromindex < endfrom; fromindex++) { | |
d841a9ba KM |
204 | if (froms[fromindex] == 0) |
205 | continue; | |
78e8943b KM |
206 | frompc = (u_long)s_lowpc + |
207 | (fromindex * HASHFRACTION * sizeof(*froms)); | |
d841a9ba KM |
208 | for (toindex = froms[fromindex]; toindex != 0; |
209 | toindex = tos[toindex].link) { | |
210 | if (debug) | |
211 | fprintf(stderr, | |
212 | "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" , | |
213 | frompc, tos[toindex].selfpc, tos[toindex].count); | |
214 | rawarc.raw_frompc = frompc; | |
215 | rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; | |
216 | rawarc.raw_count = tos[toindex].count; | |
217 | write(fd, &rawarc, sizeof (rawarc)); | |
218 | } | |
219 | } | |
220 | close(fd); | |
78e8943b KM |
221 | } |
222 | ||
223 | resetstate() | |
224 | { | |
225 | int i; | |
226 | off_t kfroms, ktos; | |
227 | int fromssize, tossize; | |
228 | char buf[BUFSIZ]; | |
229 | ||
230 | turnonoff(PROFILING_OFF); | |
231 | bzero(buf, BUFSIZ); | |
232 | ssiz = kfetch(N_SSIZ); | |
233 | sbuf = kfetch(N_SBUF); | |
234 | ssiz -= sizeof(struct phdr); | |
235 | sbuf += sizeof(struct phdr); | |
236 | klseek(kmem, (off_t)sbuf, 0); | |
237 | for (i = ssiz; i > 0; i -= BUFSIZ) | |
238 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
239 | perror("sbuf write"); | |
01538592 | 240 | exit(7); |
78e8943b KM |
241 | } |
242 | s_textsize = kfetch(N_S_TEXTSIZE); | |
243 | fromssize = s_textsize / HASHFRACTION; | |
244 | kfroms = kfetch(N_FROMS); | |
245 | klseek(kmem, kfroms, 0); | |
246 | for (i = fromssize; i > 0; i -= BUFSIZ) | |
247 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
248 | perror("kforms write"); | |
01538592 | 249 | exit(8); |
78e8943b KM |
250 | } |
251 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); | |
252 | ktos = kfetch(N_TOS); | |
253 | klseek(kmem, ktos, 0); | |
254 | for (i = tossize; i > 0; i -= BUFSIZ) | |
255 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
256 | perror("ktos write"); | |
01538592 | 257 | exit(9); |
78e8943b | 258 | } |
d841a9ba KM |
259 | } |
260 | ||
261 | turnonoff(onoff) | |
262 | int onoff; | |
263 | { | |
264 | off_t off; | |
265 | ||
266 | if ((off = nl[N_PROFILING].n_value) == 0) { | |
267 | printf("profiling: not defined in kernel\n"); | |
01538592 | 268 | exit(10); |
d841a9ba KM |
269 | } |
270 | klseek(kmem, off, 0); | |
271 | write(kmem, (char *)&onoff, sizeof (onoff)); | |
272 | } | |
273 | ||
274 | kfetch(index) | |
275 | int index; | |
276 | { | |
277 | off_t off; | |
278 | int value; | |
279 | ||
280 | if ((off = nl[index].n_value) == 0) { | |
281 | printf("%s: not defined in kernel\n", nl[index].n_name); | |
01538592 | 282 | exit(11); |
d841a9ba KM |
283 | } |
284 | if (klseek(kmem, off, 0) == -1) { | |
285 | perror("lseek"); | |
01538592 | 286 | exit(12); |
d841a9ba KM |
287 | } |
288 | if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) { | |
289 | perror("read"); | |
01538592 | 290 | exit(13); |
d841a9ba KM |
291 | } |
292 | return (value); | |
293 | } | |
294 | ||
295 | klseek(fd, base, off) | |
296 | int fd, base, off; | |
297 | { | |
298 | ||
78e8943b | 299 | if (kflag) { |
d841a9ba | 300 | /* get kernel pte */ |
fa7eedc6 | 301 | #if vax |
d841a9ba | 302 | base &= 0x7fffffff; |
fa7eedc6 SL |
303 | #endif |
304 | base = ((int)ptob(Sysmap[btop(base)].pg_pfnum))+(base&(NBPG-1)); | |
d841a9ba KM |
305 | } |
306 | return (lseek(fd, base, off)); | |
307 | } |