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d841a9ba | 1 | #ifndef lint |
524aa063 | 2 | static char sccsid[] = "@(#)kgmon.c 4.9 (Berkeley) 83/08/11"; |
d841a9ba KM |
3 | #endif |
4 | ||
5 | #include <sys/param.h> | |
01538592 | 6 | #include <machine/pte.h> |
fa7eedc6 | 7 | #include <sys/vm.h> |
d841a9ba KM |
8 | #include <stdio.h> |
9 | #include <nlist.h> | |
10 | #include <ctype.h> | |
78e8943b | 11 | #include <sys/gprof.h> |
d841a9ba KM |
12 | |
13 | #define PROFILING_ON 0 | |
14 | #define PROFILING_OFF 3 | |
15 | ||
16 | /* | |
17 | * froms is actually a bunch of unsigned shorts indexing tos | |
18 | */ | |
19 | u_short *froms; | |
20 | struct tostruct *tos; | |
21 | char *s_lowpc; | |
22 | u_long s_textsize; | |
23 | int ssiz; | |
24 | off_t sbuf; | |
25 | ||
26 | struct nlist nl[] = { | |
27 | #define N_SYSMAP 0 | |
28 | { "_Sysmap" }, | |
29 | #define N_SYSSIZE 1 | |
30 | { "_Syssize" }, | |
31 | #define N_FROMS 2 | |
32 | { "_froms" }, | |
33 | #define N_PROFILING 3 | |
34 | { "_profiling" }, | |
35 | #define N_S_LOWPC 4 | |
36 | { "_s_lowpc" }, | |
37 | #define N_S_TEXTSIZE 5 | |
38 | { "_s_textsize" }, | |
39 | #define N_SBUF 6 | |
40 | { "_sbuf" }, | |
41 | #define N_SSIZ 7 | |
42 | { "_ssiz" }, | |
43 | #define N_TOS 8 | |
44 | { "_tos" }, | |
45 | 0, | |
46 | }; | |
47 | ||
48 | struct pte *Sysmap; | |
49 | ||
50 | char *system = "/vmunix"; | |
51 | char *kmemf = "/dev/kmem"; | |
52 | int kmem; | |
ecc6febd | 53 | int bflag, hflag, kflag, rflag, pflag; |
78e8943b | 54 | int debug = 0; |
d841a9ba KM |
55 | |
56 | main(argc, argv) | |
57 | int argc; | |
58 | char *argv[]; | |
59 | { | |
ecc6febd | 60 | int mode, disp, openmode = 0; |
d841a9ba KM |
61 | |
62 | argc--, argv++; | |
4a1fd57e | 63 | while (argc > 0 && argv[0][0] == '-') { |
78e8943b KM |
64 | switch (argv[0][1]) { |
65 | case 'b': | |
66 | bflag++; | |
ecc6febd | 67 | openmode = 2; |
78e8943b KM |
68 | break; |
69 | case 'h': | |
70 | hflag++; | |
ecc6febd | 71 | openmode = 2; |
78e8943b KM |
72 | break; |
73 | case 'r': | |
74 | rflag++; | |
ecc6febd | 75 | openmode = 2; |
78e8943b | 76 | break; |
ecc6febd KM |
77 | case 'p': |
78 | pflag++; | |
79 | openmode = 2; | |
78e8943b KM |
80 | break; |
81 | default: | |
ecc6febd | 82 | printf("Usage: kgmon [ -b -h -r -p system memory ]\n"); |
78e8943b KM |
83 | exit(1); |
84 | } | |
85 | argc--, argv++; | |
86 | } | |
d841a9ba KM |
87 | if (argc > 0) { |
88 | system = *argv; | |
89 | argv++, argc--; | |
90 | } | |
91 | nlist(system, nl); | |
92 | if (nl[0].n_type == 0) { | |
93 | fprintf(stderr, "%s: no namelist\n", system); | |
01538592 | 94 | exit(2); |
d841a9ba KM |
95 | } |
96 | if (argc > 0) { | |
97 | kmemf = *argv; | |
78e8943b | 98 | kflag++; |
d841a9ba | 99 | } |
ecc6febd | 100 | kmem = open(kmemf, openmode); |
d841a9ba | 101 | if (kmem < 0) { |
ecc6febd KM |
102 | openmode = 0; |
103 | kmem = open(kmemf, openmode); | |
d841a9ba KM |
104 | if (kmem < 0) { |
105 | fprintf(stderr, "cannot open "); | |
106 | perror(kmemf); | |
01538592 | 107 | exit(3); |
d841a9ba | 108 | } |
78e8943b | 109 | fprintf(stderr, "%s opened read-only\n", kmemf); |
78e8943b KM |
110 | if (rflag) |
111 | fprintf(stderr, "-r supressed\n"); | |
112 | if (bflag) | |
113 | fprintf(stderr, "-b supressed\n"); | |
114 | if (hflag) | |
115 | fprintf(stderr, "-h supressed\n"); | |
116 | rflag = 0; | |
117 | bflag = 0; | |
118 | hflag = 0; | |
d841a9ba | 119 | } |
78e8943b | 120 | if (kflag) { |
d841a9ba KM |
121 | off_t off; |
122 | ||
123 | off = nl[N_SYSMAP].n_value & 0x7fffffff; | |
124 | lseek(kmem, off, 0); | |
125 | nl[N_SYSSIZE].n_value *= 4; | |
126 | Sysmap = (struct pte *)malloc(nl[N_SYSSIZE].n_value); | |
127 | if (Sysmap == 0) { | |
128 | perror("Sysmap"); | |
01538592 | 129 | exit(4); |
d841a9ba KM |
130 | } |
131 | read(kmem, Sysmap, nl[N_SYSSIZE].n_value); | |
132 | } | |
79ec4952 | 133 | mode = kfetch(N_PROFILING); |
78e8943b KM |
134 | if (hflag) |
135 | disp = PROFILING_OFF; | |
136 | else if (bflag) | |
137 | disp = PROFILING_ON; | |
138 | else | |
79ec4952 | 139 | disp = mode; |
ecc6febd KM |
140 | if (pflag) { |
141 | if (openmode == 0 && mode == PROFILING_ON) | |
79ec4952 | 142 | fprintf(stderr, "data may be inconsistent\n"); |
78e8943b | 143 | dumpstate(); |
79ec4952 | 144 | } |
78e8943b KM |
145 | if (rflag) |
146 | resetstate(); | |
147 | turnonoff(disp); | |
79ec4952 | 148 | fprintf(stdout, "kernel profiling is %s.\n", disp ? "off" : "running"); |
78e8943b KM |
149 | } |
150 | ||
151 | dumpstate() | |
152 | { | |
153 | int i; | |
154 | int fd; | |
155 | off_t kfroms, ktos; | |
156 | int fromindex, endfrom, fromssize, tossize; | |
157 | u_long frompc; | |
158 | int toindex; | |
159 | struct rawarc rawarc; | |
160 | char buf[BUFSIZ]; | |
161 | ||
d841a9ba KM |
162 | turnonoff(PROFILING_OFF); |
163 | fd = creat("gmon.out", 0666); | |
164 | if (fd < 0) { | |
165 | perror("gmon.out"); | |
166 | return; | |
167 | } | |
168 | ssiz = kfetch(N_SSIZ); | |
169 | sbuf = kfetch(N_SBUF); | |
170 | klseek(kmem, (off_t)sbuf, 0); | |
171 | for (i = ssiz; i > 0; i -= BUFSIZ) { | |
172 | read(kmem, buf, i < BUFSIZ ? i : BUFSIZ); | |
173 | write(fd, buf, i < BUFSIZ ? i : BUFSIZ); | |
174 | } | |
175 | s_textsize = kfetch(N_S_TEXTSIZE); | |
78e8943b KM |
176 | fromssize = s_textsize / HASHFRACTION; |
177 | froms = (u_short *)malloc(fromssize); | |
d841a9ba KM |
178 | kfroms = kfetch(N_FROMS); |
179 | klseek(kmem, kfroms, 0); | |
78e8943b KM |
180 | i = read(kmem, ((char *)(froms)), fromssize); |
181 | if (i != fromssize) { | |
182 | fprintf(stderr, "read froms: request %d, got %d", fromssize, i); | |
183 | perror(""); | |
184 | exit(5); | |
d841a9ba | 185 | } |
78e8943b KM |
186 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
187 | tos = (struct tostruct *)malloc(tossize); | |
d841a9ba KM |
188 | ktos = kfetch(N_TOS); |
189 | klseek(kmem, ktos, 0); | |
78e8943b KM |
190 | i = read(kmem, ((char *)(tos)), tossize); |
191 | if (i != tossize) { | |
192 | fprintf(stderr, "read tos: request %d, got %d", tossize, i); | |
193 | perror(""); | |
194 | exit(6); | |
d841a9ba KM |
195 | } |
196 | s_lowpc = (char *)kfetch(N_S_LOWPC); | |
197 | if (debug) | |
198 | fprintf(stderr, "s_lowpc 0x%x, s_textsize 0x%x\n", | |
199 | s_lowpc, s_textsize); | |
78e8943b KM |
200 | endfrom = fromssize / sizeof(*froms); |
201 | for (fromindex = 0; fromindex < endfrom; fromindex++) { | |
d841a9ba KM |
202 | if (froms[fromindex] == 0) |
203 | continue; | |
78e8943b KM |
204 | frompc = (u_long)s_lowpc + |
205 | (fromindex * HASHFRACTION * sizeof(*froms)); | |
d841a9ba KM |
206 | for (toindex = froms[fromindex]; toindex != 0; |
207 | toindex = tos[toindex].link) { | |
208 | if (debug) | |
209 | fprintf(stderr, | |
210 | "[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" , | |
211 | frompc, tos[toindex].selfpc, tos[toindex].count); | |
212 | rawarc.raw_frompc = frompc; | |
213 | rawarc.raw_selfpc = (u_long)tos[toindex].selfpc; | |
214 | rawarc.raw_count = tos[toindex].count; | |
215 | write(fd, &rawarc, sizeof (rawarc)); | |
216 | } | |
217 | } | |
218 | close(fd); | |
78e8943b KM |
219 | } |
220 | ||
221 | resetstate() | |
222 | { | |
223 | int i; | |
224 | off_t kfroms, ktos; | |
225 | int fromssize, tossize; | |
226 | char buf[BUFSIZ]; | |
227 | ||
228 | turnonoff(PROFILING_OFF); | |
229 | bzero(buf, BUFSIZ); | |
230 | ssiz = kfetch(N_SSIZ); | |
231 | sbuf = kfetch(N_SBUF); | |
232 | ssiz -= sizeof(struct phdr); | |
233 | sbuf += sizeof(struct phdr); | |
234 | klseek(kmem, (off_t)sbuf, 0); | |
235 | for (i = ssiz; i > 0; i -= BUFSIZ) | |
236 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
237 | perror("sbuf write"); | |
01538592 | 238 | exit(7); |
78e8943b KM |
239 | } |
240 | s_textsize = kfetch(N_S_TEXTSIZE); | |
241 | fromssize = s_textsize / HASHFRACTION; | |
242 | kfroms = kfetch(N_FROMS); | |
243 | klseek(kmem, kfroms, 0); | |
244 | for (i = fromssize; i > 0; i -= BUFSIZ) | |
245 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
246 | perror("kforms write"); | |
01538592 | 247 | exit(8); |
78e8943b KM |
248 | } |
249 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); | |
250 | ktos = kfetch(N_TOS); | |
251 | klseek(kmem, ktos, 0); | |
252 | for (i = tossize; i > 0; i -= BUFSIZ) | |
253 | if (write(kmem, buf, i < BUFSIZ ? i : BUFSIZ) < 0) { | |
254 | perror("ktos write"); | |
01538592 | 255 | exit(9); |
78e8943b | 256 | } |
d841a9ba KM |
257 | } |
258 | ||
259 | turnonoff(onoff) | |
260 | int onoff; | |
261 | { | |
262 | off_t off; | |
263 | ||
264 | if ((off = nl[N_PROFILING].n_value) == 0) { | |
265 | printf("profiling: not defined in kernel\n"); | |
01538592 | 266 | exit(10); |
d841a9ba KM |
267 | } |
268 | klseek(kmem, off, 0); | |
269 | write(kmem, (char *)&onoff, sizeof (onoff)); | |
270 | } | |
271 | ||
272 | kfetch(index) | |
273 | int index; | |
274 | { | |
275 | off_t off; | |
276 | int value; | |
277 | ||
278 | if ((off = nl[index].n_value) == 0) { | |
279 | printf("%s: not defined in kernel\n", nl[index].n_name); | |
01538592 | 280 | exit(11); |
d841a9ba KM |
281 | } |
282 | if (klseek(kmem, off, 0) == -1) { | |
283 | perror("lseek"); | |
01538592 | 284 | exit(12); |
d841a9ba KM |
285 | } |
286 | if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) { | |
287 | perror("read"); | |
01538592 | 288 | exit(13); |
d841a9ba KM |
289 | } |
290 | return (value); | |
291 | } | |
292 | ||
293 | klseek(fd, base, off) | |
294 | int fd, base, off; | |
295 | { | |
296 | ||
78e8943b | 297 | if (kflag) { |
d841a9ba | 298 | /* get kernel pte */ |
fa7eedc6 | 299 | #if vax |
d841a9ba | 300 | base &= 0x7fffffff; |
fa7eedc6 SL |
301 | #endif |
302 | base = ((int)ptob(Sysmap[btop(base)].pg_pfnum))+(base&(NBPG-1)); | |
d841a9ba KM |
303 | } |
304 | return (lseek(fd, base, off)); | |
305 | } |