| 1 | /* Copyright (c) 1982 Regents of the University of California */ |
| 2 | |
| 3 | #ifndef lint |
| 4 | static char sccsid[] = "@(#)kgmon.c 4.7 83/03/10"; |
| 5 | #endif |
| 6 | |
| 7 | #include <sys/param.h> |
| 8 | #include <machine/pte.h> |
| 9 | #include <sys/vm.h> |
| 10 | #include <stdio.h> |
| 11 | #include <nlist.h> |
| 12 | #include <ctype.h> |
| 13 | #include <sys/gprof.h> |
| 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; |
| 55 | int bflag, hflag, kflag, rflag, pflag; |
| 56 | int debug = 0; |
| 57 | |
| 58 | main(argc, argv) |
| 59 | int argc; |
| 60 | char *argv[]; |
| 61 | { |
| 62 | int mode, disp, openmode = 0; |
| 63 | |
| 64 | argc--, argv++; |
| 65 | while (argv[0][0] == '-') { |
| 66 | switch (argv[0][1]) { |
| 67 | case 'b': |
| 68 | bflag++; |
| 69 | openmode = 2; |
| 70 | break; |
| 71 | case 'h': |
| 72 | hflag++; |
| 73 | openmode = 2; |
| 74 | break; |
| 75 | case 'r': |
| 76 | rflag++; |
| 77 | openmode = 2; |
| 78 | break; |
| 79 | case 'p': |
| 80 | pflag++; |
| 81 | openmode = 2; |
| 82 | break; |
| 83 | default: |
| 84 | printf("Usage: kgmon [ -b -h -r -p system memory ]\n"); |
| 85 | exit(1); |
| 86 | } |
| 87 | argc--, argv++; |
| 88 | } |
| 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); |
| 96 | exit(2); |
| 97 | } |
| 98 | if (argc > 0) { |
| 99 | kmemf = *argv; |
| 100 | kflag++; |
| 101 | } |
| 102 | kmem = open(kmemf, openmode); |
| 103 | if (kmem < 0) { |
| 104 | openmode = 0; |
| 105 | kmem = open(kmemf, openmode); |
| 106 | if (kmem < 0) { |
| 107 | fprintf(stderr, "cannot open "); |
| 108 | perror(kmemf); |
| 109 | exit(3); |
| 110 | } |
| 111 | fprintf(stderr, "%s opened read-only\n", kmemf); |
| 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; |
| 121 | } |
| 122 | if (kflag) { |
| 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"); |
| 131 | exit(4); |
| 132 | } |
| 133 | read(kmem, Sysmap, nl[N_SYSSIZE].n_value); |
| 134 | } |
| 135 | mode = kfetch(N_PROFILING); |
| 136 | if (hflag) |
| 137 | disp = PROFILING_OFF; |
| 138 | else if (bflag) |
| 139 | disp = PROFILING_ON; |
| 140 | else |
| 141 | disp = mode; |
| 142 | if (pflag) { |
| 143 | if (openmode == 0 && mode == PROFILING_ON) |
| 144 | fprintf(stderr, "data may be inconsistent\n"); |
| 145 | dumpstate(); |
| 146 | } |
| 147 | if (rflag) |
| 148 | resetstate(); |
| 149 | turnonoff(disp); |
| 150 | fprintf(stdout, "kernel profiling is %s.\n", disp ? "off" : "running"); |
| 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 | |
| 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); |
| 178 | fromssize = s_textsize / HASHFRACTION; |
| 179 | froms = (u_short *)malloc(fromssize); |
| 180 | kfroms = kfetch(N_FROMS); |
| 181 | klseek(kmem, kfroms, 0); |
| 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); |
| 187 | } |
| 188 | tossize = (s_textsize * ARCDENSITY / 100) * sizeof(struct tostruct); |
| 189 | tos = (struct tostruct *)malloc(tossize); |
| 190 | ktos = kfetch(N_TOS); |
| 191 | klseek(kmem, ktos, 0); |
| 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); |
| 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); |
| 202 | endfrom = fromssize / sizeof(*froms); |
| 203 | for (fromindex = 0; fromindex < endfrom; fromindex++) { |
| 204 | if (froms[fromindex] == 0) |
| 205 | continue; |
| 206 | frompc = (u_long)s_lowpc + |
| 207 | (fromindex * HASHFRACTION * sizeof(*froms)); |
| 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); |
| 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"); |
| 240 | exit(7); |
| 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"); |
| 249 | exit(8); |
| 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"); |
| 257 | exit(9); |
| 258 | } |
| 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"); |
| 268 | exit(10); |
| 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); |
| 282 | exit(11); |
| 283 | } |
| 284 | if (klseek(kmem, off, 0) == -1) { |
| 285 | perror("lseek"); |
| 286 | exit(12); |
| 287 | } |
| 288 | if (read(kmem, (char *)&value, sizeof (value)) != sizeof (value)) { |
| 289 | perror("read"); |
| 290 | exit(13); |
| 291 | } |
| 292 | return (value); |
| 293 | } |
| 294 | |
| 295 | klseek(fd, base, off) |
| 296 | int fd, base, off; |
| 297 | { |
| 298 | |
| 299 | if (kflag) { |
| 300 | /* get kernel pte */ |
| 301 | #if vax |
| 302 | base &= 0x7fffffff; |
| 303 | #endif |
| 304 | base = ((int)ptob(Sysmap[btop(base)].pg_pfnum))+(base&(NBPG-1)); |
| 305 | } |
| 306 | return (lseek(fd, base, off)); |
| 307 | } |