| 1 | static char *sccsid = "@(#)analyze.c 4.1 (Berkeley) 10/1/80"; |
| 2 | #include <stdio.h> |
| 3 | #include <sys/param.h> |
| 4 | #include <sys/dir.h> |
| 5 | #include <sys/pte.h> |
| 6 | #include <nlist.h> |
| 7 | #include <sys/map.h> |
| 8 | #include <sys/user.h> |
| 9 | #include <sys/proc.h> |
| 10 | #include <sys/text.h> |
| 11 | #include <sys/cmap.h> |
| 12 | #include <sys/vm.h> |
| 13 | |
| 14 | /* |
| 15 | * Analyze - analyze a core (and optional paging area) saved from |
| 16 | * a virtual Unix system crash. |
| 17 | */ |
| 18 | |
| 19 | int Dflg; |
| 20 | int dflg; |
| 21 | int vflg; |
| 22 | int mflg; |
| 23 | int fflg; |
| 24 | int sflg; |
| 25 | |
| 26 | /* use vprintf with care; it plays havoc with ``else's'' */ |
| 27 | #define vprintf if (vflg) printf |
| 28 | |
| 29 | #define clear(x) ((int)x & 0x7fffffff) |
| 30 | |
| 31 | struct proc proc[NPROC]; |
| 32 | struct text text[NTEXT]; |
| 33 | struct map swapmap[SMAPSIZ]; |
| 34 | struct cmap *cmap; |
| 35 | struct pte *usrpt; |
| 36 | struct pte *Usrptma; |
| 37 | int firstfree; |
| 38 | int maxfree; |
| 39 | int freemem; |
| 40 | struct pte p0br[ctopt(MAXTSIZ+MAXDSIZ+MAXSSIZ)][NPTEPG]; |
| 41 | int pid; |
| 42 | |
| 43 | struct paginfo { |
| 44 | char z_type; |
| 45 | char z_count; |
| 46 | short z_pid; |
| 47 | struct pte z_pte; |
| 48 | } *paginfo; |
| 49 | #define ZLOST 0 |
| 50 | #define ZDATA 1 |
| 51 | #define ZSTACK 2 |
| 52 | #define ZUDOT 3 |
| 53 | #define ZPAGET 4 |
| 54 | #define ZTEXT 5 |
| 55 | #define ZFREE 6 |
| 56 | #define ZINTRAN 7 |
| 57 | |
| 58 | #define NDBLKS (2*SMAPSIZ) |
| 59 | struct dblks { |
| 60 | short d_first; |
| 61 | short d_size; |
| 62 | char d_type; |
| 63 | char d_index; |
| 64 | } dblks[NDBLKS]; |
| 65 | int ndblks; |
| 66 | |
| 67 | #define DFREE 0 |
| 68 | #define DDATA 1 |
| 69 | #define DSTACK 2 |
| 70 | #define DTEXT 3 |
| 71 | #define DUDOT 4 |
| 72 | #define DPAGET 5 |
| 73 | |
| 74 | union { |
| 75 | char buf[UPAGES][512]; |
| 76 | struct user U; |
| 77 | } u_area; |
| 78 | #define u u_area.U |
| 79 | |
| 80 | int fcore = -1; |
| 81 | int fswap = -1; |
| 82 | |
| 83 | struct nlist nl[] = { |
| 84 | #define X_PROC 0 |
| 85 | { "_proc" }, |
| 86 | #define X_USRPT 1 |
| 87 | { "_usrpt" }, |
| 88 | #define X_PTMA 2 |
| 89 | { "_Usrptma" }, |
| 90 | #define X_FIRSTFREE 3 |
| 91 | { "_firstfr" }, |
| 92 | #define X_MAXFREE 4 |
| 93 | { "_maxfree" }, |
| 94 | #define X_TEXT 5 |
| 95 | { "_text" }, |
| 96 | #define X_FREEMEM 6 |
| 97 | { "_freemem" }, |
| 98 | #define X_CMAP 7 |
| 99 | { "_cmap" }, |
| 100 | #define X_ECMAP 8 |
| 101 | { "_ecmap" }, |
| 102 | #define X_SWAPMAP 9 |
| 103 | { "_swapmap" }, |
| 104 | { 0 } |
| 105 | }; |
| 106 | |
| 107 | main(argc, argv) |
| 108 | int argc; |
| 109 | char **argv; |
| 110 | { |
| 111 | register struct nlist *np; |
| 112 | register struct proc *p; |
| 113 | register struct text *xp; |
| 114 | register struct pte *pte; |
| 115 | register int i; |
| 116 | int w, a; |
| 117 | |
| 118 | argc--, argv++; |
| 119 | while (argc > 0 && argv[0][0] == '-') { |
| 120 | register char *cp = *argv++; |
| 121 | argc--; |
| 122 | while (*++cp) switch (*cp) { |
| 123 | |
| 124 | case 'm': |
| 125 | mflg++; |
| 126 | break; |
| 127 | |
| 128 | case 'v': |
| 129 | vflg++; |
| 130 | break; |
| 131 | |
| 132 | case 's': |
| 133 | if (argc < 2) |
| 134 | goto usage; |
| 135 | if ((fswap = open(argv[0], 0)) < 0) { |
| 136 | perror(argv[0]); |
| 137 | exit(1); |
| 138 | } |
| 139 | argc--,argv++; |
| 140 | sflg++; |
| 141 | break; |
| 142 | |
| 143 | case 'f': |
| 144 | fflg++; |
| 145 | break; |
| 146 | |
| 147 | case 'D': |
| 148 | Dflg++; |
| 149 | break; |
| 150 | |
| 151 | case 'd': |
| 152 | dflg++; |
| 153 | break; |
| 154 | |
| 155 | default: |
| 156 | goto usage; |
| 157 | } |
| 158 | } |
| 159 | if (argc < 1) { |
| 160 | usage: |
| 161 | fprintf(stderr, "usage: analyze [ -vmfd ] [ -s swapfile ] corefile [ system ]\n"); |
| 162 | exit(1); |
| 163 | } |
| 164 | close(0); |
| 165 | if ((fcore = open(argv[0], 0)) < 0) { |
| 166 | perror(argv[0]); |
| 167 | exit(1); |
| 168 | } |
| 169 | nlist(argc > 1 ? argv[1] : "/vmunix", nl); |
| 170 | if (nl[0].n_value == 0) { |
| 171 | fprintf(stderr, "%s: bad namelist\n", |
| 172 | argc > 1 ? argv[1] : "/vmunix"); |
| 173 | exit(1); |
| 174 | } |
| 175 | for (np = nl; np->n_name[0]; np++) |
| 176 | vprintf("%8.8s %x\n", np->n_name ,np->n_value ); |
| 177 | usrpt = (struct pte *)clear(nl[X_USRPT].n_value); |
| 178 | Usrptma = (struct pte *)clear(nl[X_PTMA].n_value); |
| 179 | firstfree = get(nl[X_FIRSTFREE].n_value); |
| 180 | maxfree = get(nl[X_MAXFREE].n_value); |
| 181 | freemem = get(nl[X_FREEMEM].n_value); |
| 182 | paginfo = (struct paginfo *)calloc(maxfree, sizeof (struct paginfo)); |
| 183 | if (paginfo == NULL) { |
| 184 | fprintf(stderr, "maxfree %x?... out of mem!\n", maxfree); |
| 185 | exit(1); |
| 186 | } |
| 187 | vprintf("usrpt %x\nUsrptma %x\nfirstfree %x\nmaxfree %x\nfreemem %x\n", |
| 188 | usrpt, Usrptma, firstfree, maxfree, freemem); |
| 189 | lseek(fcore, (long)clear(nl[X_PROC].n_value), 0); |
| 190 | if (read(fcore, (char *)proc, sizeof proc) != sizeof proc) { |
| 191 | perror("proc read"); |
| 192 | exit(1); |
| 193 | } |
| 194 | lseek(fcore, (long)clear(nl[X_TEXT].n_value), 0); |
| 195 | if (read(fcore, (char *)text, sizeof text) != sizeof text) { |
| 196 | perror("text read"); |
| 197 | exit(1); |
| 198 | } |
| 199 | i = (get(nl[X_ECMAP].n_value) - get(nl[X_CMAP].n_value)); |
| 200 | cmap = (struct cmap *)calloc(i, 1); |
| 201 | if (cmap == NULL) { |
| 202 | fprintf(stderr, "not enough mem for %x bytes of cmap\n", i); |
| 203 | exit(1); |
| 204 | } |
| 205 | lseek(fcore, (long)clear(get(nl[X_CMAP].n_value)), 0); |
| 206 | if (read(fcore, (char *)cmap, i) != i) { |
| 207 | perror("cmap read"); |
| 208 | exit(1); |
| 209 | } |
| 210 | lseek(fcore, (long)clear(nl[X_SWAPMAP].n_value), 0); |
| 211 | if (read(fcore, (char *)swapmap, sizeof swapmap) != sizeof swapmap) { |
| 212 | perror("swapmap read"); |
| 213 | exit(1); |
| 214 | } |
| 215 | for (p = &proc[1]; p < &proc[NPROC]; p++) { |
| 216 | p->p_p0br = (struct pte *)clear(p->p_p0br); |
| 217 | p->p_addr = (struct pte *)clear(p->p_addr); |
| 218 | if (p->p_stat == 0) |
| 219 | continue; |
| 220 | printf("proc %d ", p->p_pid); |
| 221 | if (p->p_stat == SZOMB) { |
| 222 | printf("zombie\n"); |
| 223 | continue; |
| 224 | } |
| 225 | if (p->p_flag & SLOAD) { |
| 226 | printf("loaded, p0br %x, ", p->p_p0br); |
| 227 | printf("%d pages of page tables:", p->p_szpt); |
| 228 | a = btokmx(p->p_p0br); |
| 229 | for (i = 0; i < p->p_szpt; i++) { |
| 230 | w = get(&Usrptma[a + i]); |
| 231 | printf(" %x", w & PG_PFNUM); |
| 232 | } |
| 233 | printf("\n"); |
| 234 | for(i = 0; i < p->p_szpt; i++) { |
| 235 | w = get(&Usrptma[a + i]); |
| 236 | if (getpt(w, i)) |
| 237 | count(p, (struct pte *)&w, ZPAGET); |
| 238 | } |
| 239 | } else { |
| 240 | /* i = ctopt(btoc(u.u_exdata.ux_dsize)); */ |
| 241 | i = clrnd(ctopt(p->p_tsize + p->p_dsize + p->p_ssize)); |
| 242 | printf("swapped, swaddr %x\n", p->p_swaddr); |
| 243 | duse(p->p_swaddr, clrnd(ctod(UPAGES)), DUDOT, p - proc); |
| 244 | duse(p->p_swaddr + ctod(UPAGES), |
| 245 | clrnd(i - p->p_tsize / NPTEPG), DPAGET, p - proc); |
| 246 | /* i, DPAGET, p - proc); */ |
| 247 | } |
| 248 | p->p_p0br = (struct pte *)p0br; |
| 249 | p->p_addr = uaddr(p); |
| 250 | p->p_textp = &text[p->p_textp - (struct text *)nl[X_TEXT].n_value]; |
| 251 | if (p->p_pid == 2) |
| 252 | continue; |
| 253 | if (getu(p)) |
| 254 | continue; |
| 255 | u.u_procp = p; |
| 256 | pdmap(); |
| 257 | if ((p->p_flag & SLOAD) == 0) |
| 258 | continue; |
| 259 | pid = p->p_pid; |
| 260 | for (i = 0; i < p->p_tsize; i++) { |
| 261 | pte = tptopte(p, i); |
| 262 | if (pte->pg_fod || pte->pg_pfnum == 0) |
| 263 | continue; |
| 264 | if (pte->pg_pfnum >= firstfree && pte->pg_pfnum < maxfree && cmap[pgtocm(pte->pg_pfnum)].c_intrans) |
| 265 | count(p, pte, ZINTRAN); |
| 266 | else |
| 267 | count(p, pte, ZTEXT); |
| 268 | } |
| 269 | vprintf("\n"); |
| 270 | for (i = 0; i < p->p_dsize; i++) { |
| 271 | pte = dptopte(p, i); |
| 272 | if (pte->pg_fod || pte->pg_pfnum == 0) |
| 273 | continue; |
| 274 | if (pte->pg_pfnum >= firstfree && pte->pg_pfnum < maxfree && cmap[pgtocm(pte->pg_pfnum)].c_intrans) |
| 275 | count(p, pte, ZINTRAN); |
| 276 | else |
| 277 | count(p, pte, ZDATA); |
| 278 | } |
| 279 | vprintf("\n"); |
| 280 | for (i = 0; i < p->p_ssize; i++) { |
| 281 | pte = sptopte(p, i); |
| 282 | if (pte->pg_fod || pte->pg_pfnum == 0) |
| 283 | continue; |
| 284 | if (pte->pg_pfnum >= firstfree && pte->pg_pfnum < maxfree && cmap[pgtocm(pte->pg_pfnum)].c_intrans) |
| 285 | count(p, pte, ZINTRAN); |
| 286 | else |
| 287 | count(p, pte, ZSTACK); |
| 288 | } |
| 289 | vprintf("\n"); |
| 290 | for (i = 0; i < UPAGES; i++) |
| 291 | count(p, &p->p_addr[i], ZUDOT); |
| 292 | vprintf("\n"); |
| 293 | vprintf("\n"); |
| 294 | } |
| 295 | for (xp = &text[0]; xp < &text[NTEXT]; xp++) |
| 296 | if (xp->x_iptr) { |
| 297 | for (i = 0; i < xp->x_size; i += DMTEXT) |
| 298 | duse(xp->x_daddr[i], |
| 299 | (xp->x_size - i) > DMTEXT |
| 300 | ? DMTEXT : xp->x_size - i, |
| 301 | DTEXT, xp - text); |
| 302 | if (xp->x_flag & XPAGI) |
| 303 | duse(xp->x_ptdaddr, clrnd(ctopt(xp->x_size)), |
| 304 | DTEXT, xp - text); |
| 305 | } |
| 306 | dmcheck(); |
| 307 | fixfree(); |
| 308 | summary(); |
| 309 | exit(0); |
| 310 | } |
| 311 | |
| 312 | pdmap() |
| 313 | { |
| 314 | register struct text *xp; |
| 315 | |
| 316 | if (fswap == -1 && (u.u_procp->p_flag & SLOAD) == 0) |
| 317 | return; |
| 318 | if (Dflg) |
| 319 | printf("disk for pid %d", u.u_procp->p_pid); |
| 320 | if ((xp = u.u_procp->p_textp) && Dflg) |
| 321 | ptdmap(xp->x_daddr, xp->x_size); |
| 322 | pdmseg("data", &u.u_dmap, DDATA); |
| 323 | pdmseg("stack", &u.u_smap, DSTACK); |
| 324 | if (Dflg) |
| 325 | printf("\n"); |
| 326 | } |
| 327 | |
| 328 | ptdmap(dp, size) |
| 329 | register daddr_t *dp; |
| 330 | int size; |
| 331 | { |
| 332 | register int i; |
| 333 | int rem; |
| 334 | |
| 335 | if (Dflg) |
| 336 | printf(" text:"); |
| 337 | for (i = 0, rem = size; rem > 0; i++) { |
| 338 | if (Dflg) |
| 339 | printf(" %x<%x>", dp[i], rem < DMTEXT ? rem : DMTEXT); |
| 340 | rem -= rem < DMTEXT ? rem : DMTEXT; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | pdmseg(cp, dmp, type) |
| 345 | char *cp; |
| 346 | struct dmap *dmp; |
| 347 | { |
| 348 | register int i; |
| 349 | int b, rem; |
| 350 | |
| 351 | if (Dflg) |
| 352 | printf(", %s:", cp); |
| 353 | b = DMMIN; |
| 354 | for (i = 0, rem = dmp->dm_size; rem > 0; i++) { |
| 355 | if (Dflg) |
| 356 | printf(" %x<%x>", dmp->dm_map[i], rem < b ? rem : b); |
| 357 | duse(dmp->dm_map[i], b, type, u.u_procp - proc); |
| 358 | rem -= b; |
| 359 | if (b < DMMAX) |
| 360 | b *= 2; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | duse(first, size, type, index) |
| 365 | { |
| 366 | register struct dblks *dp; |
| 367 | |
| 368 | if (fswap == -1) |
| 369 | return; |
| 370 | dp = &dblks[ndblks]; |
| 371 | if (++ndblks > NDBLKS) { |
| 372 | fprintf(stderr, "too many disk blocks, increase NDBLKS\n"); |
| 373 | exit(1); |
| 374 | } |
| 375 | dp->d_first = first; |
| 376 | dp->d_size = size; |
| 377 | dp->d_type = type; |
| 378 | dp->d_index = index; |
| 379 | } |
| 380 | |
| 381 | dsort(d, e) |
| 382 | register struct dblks *d, *e; |
| 383 | { |
| 384 | |
| 385 | return (e->d_first - d->d_first); |
| 386 | } |
| 387 | |
| 388 | dmcheck() |
| 389 | { |
| 390 | register struct map *smp; |
| 391 | register struct dblks *d, *e; |
| 392 | |
| 393 | for (smp = swapmap; smp->m_size; smp++) |
| 394 | duse(smp->m_addr, smp->m_size, DFREE, 0); |
| 395 | duse(CLSIZE, DMTEXT - CLSIZE, DFREE, 0); |
| 396 | qsort(dblks, ndblks, sizeof (struct dblks), dsort); |
| 397 | d = &dblks[ndblks - 1]; |
| 398 | if (d->d_first > 1) |
| 399 | printf("lost swap map: start %x size %x\n", 1, d->d_first); |
| 400 | for (; d > dblks; d--) { |
| 401 | if (dflg) |
| 402 | dprint(d); |
| 403 | e = d - 1; |
| 404 | if (d->d_first + d->d_size > e->d_first) { |
| 405 | printf("overlap in swap mappings:\n"); |
| 406 | dprint(d); |
| 407 | dprint(e); |
| 408 | } else if (d->d_first + d->d_size < e->d_first) { |
| 409 | printf("lost swap map: start %x size %x\n", |
| 410 | d->d_first + d->d_size, |
| 411 | e->d_first - (d->d_first + d->d_size)); |
| 412 | } |
| 413 | } |
| 414 | if (dflg) |
| 415 | dprint(dblks); |
| 416 | if (sflg) |
| 417 | printf("swap space ends at %x\n", d->d_first + d->d_size); |
| 418 | } |
| 419 | |
| 420 | char *dnames[] = { |
| 421 | "DFREE", |
| 422 | "DDATA", |
| 423 | "DSTACK", |
| 424 | "DTEXT", |
| 425 | "DUDOT", |
| 426 | "DPAGET", |
| 427 | }; |
| 428 | |
| 429 | dprint(d) |
| 430 | register struct dblks *d; |
| 431 | { |
| 432 | |
| 433 | printf("at %4x size %4x type %s", d->d_first, d->d_size, |
| 434 | dnames[d->d_type]); |
| 435 | switch (d->d_type) { |
| 436 | |
| 437 | case DSTACK: |
| 438 | case DDATA: |
| 439 | printf(" pid %d", proc[d->d_index].p_pid); |
| 440 | break; |
| 441 | } |
| 442 | printf("\n"); |
| 443 | } |
| 444 | |
| 445 | getpt(x, i) |
| 446 | int x, i; |
| 447 | { |
| 448 | |
| 449 | lseek(fcore, (long)ctob((x & PG_PFNUM)), 0); |
| 450 | if (read(fcore, (char *)(p0br[i]), NBPG) != NBPG) { |
| 451 | perror("read"); |
| 452 | fprintf(stderr, "getpt error reading frame %x\n", clear(x)); |
| 453 | return (0); |
| 454 | } |
| 455 | return (1); |
| 456 | } |
| 457 | |
| 458 | checkpg(p, pte, type) |
| 459 | register struct pte *pte; |
| 460 | register struct proc *p; |
| 461 | int type; |
| 462 | { |
| 463 | char corepg[NBPG], swapg[NBPG]; |
| 464 | register int i, count, dblock; |
| 465 | register int pfnum = pte->pg_pfnum; |
| 466 | |
| 467 | if (type == ZPAGET || type == ZUDOT) |
| 468 | return (0); |
| 469 | lseek(fcore, (long)(NBPG * pfnum), 0); |
| 470 | if (read(fcore, corepg, NBPG) != NBPG){ |
| 471 | perror("read"); |
| 472 | fprintf(stderr, "Error reading core page %x\n", pfnum); |
| 473 | return (0); |
| 474 | } |
| 475 | switch (type) { |
| 476 | |
| 477 | case ZDATA: |
| 478 | if (ptetodp(p, pte) >= u.u_dmap.dm_size) |
| 479 | return (0); |
| 480 | break; |
| 481 | |
| 482 | case ZTEXT: |
| 483 | break; |
| 484 | |
| 485 | case ZSTACK: |
| 486 | if (ptetosp(p, pte) >= u.u_smap.dm_size) |
| 487 | return (0); |
| 488 | break; |
| 489 | |
| 490 | default: |
| 491 | return(0); |
| 492 | break; |
| 493 | } |
| 494 | dblock = vtod(p, ptetov(p, pte), &u.u_dmap, &u.u_smap); |
| 495 | vprintf(" %x", dblock); |
| 496 | if (pte->pg_fod || pte->pg_pfnum == 0) |
| 497 | return (0); |
| 498 | if (cmap[pgtocm(pte->pg_pfnum)].c_intrans || pte->pg_m || pte->pg_swapm) |
| 499 | return (0); |
| 500 | lseek(fswap, (long)(NBPG * dblock), 0); |
| 501 | if (read(fswap, swapg, NBPG) != NBPG) { |
| 502 | fprintf(stderr,"swap page %x: ", dblock); |
| 503 | perror("read"); |
| 504 | } |
| 505 | count = 0; |
| 506 | for (i = 0; i < NBPG; i++) |
| 507 | if (corepg[i] != swapg[i]) |
| 508 | count++; |
| 509 | if (count == 0) |
| 510 | vprintf("\tsame"); |
| 511 | return (count); |
| 512 | } |
| 513 | |
| 514 | getu(p) |
| 515 | register struct proc *p; |
| 516 | { |
| 517 | int i, w, cc, errs = 0; |
| 518 | |
| 519 | for (i = 0; i < UPAGES; i++) { |
| 520 | if (p->p_flag & SLOAD) { |
| 521 | lseek(fcore, ctob(p->p_addr[i].pg_pfnum), 0); |
| 522 | if (read(fcore, u_area.buf[i], NBPG) != NBPG) |
| 523 | perror("core u. read"), errs++; |
| 524 | } else if (fswap >= 0) { |
| 525 | lseek(fswap, (long)(NBPG * (p->p_swaddr+i)), 0); |
| 526 | if (read(fswap, u_area.buf[i], NBPG) != NBPG) |
| 527 | perror("swap u. read"), errs++; |
| 528 | } |
| 529 | } |
| 530 | return (errs); |
| 531 | } |
| 532 | |
| 533 | char *typepg[] = { |
| 534 | "lost", |
| 535 | "data", |
| 536 | "stack", |
| 537 | "udot", |
| 538 | "paget", |
| 539 | "text", |
| 540 | "free", |
| 541 | "intransit", |
| 542 | }; |
| 543 | |
| 544 | count(p, pte, type) |
| 545 | struct proc *p; |
| 546 | register struct pte *pte; |
| 547 | int type; |
| 548 | { |
| 549 | register int pfnum = pte->pg_pfnum; |
| 550 | register struct paginfo *zp = &paginfo[pfnum]; |
| 551 | int ndif; |
| 552 | #define zprintf if (type==ZINTRAN || vflg) printf |
| 553 | |
| 554 | if (type == ZINTRAN && pfnum == 0) |
| 555 | return; |
| 556 | zprintf("page %x %s", pfnum, typepg[type]); |
| 557 | if (sflg == 0 || (ndif = checkpg(p, pte, type)) == 0) { |
| 558 | zprintf("\n"); |
| 559 | } else { |
| 560 | if (vflg == 0 && type != ZINTRAN) |
| 561 | printf("page %x %s,", pfnum, typepg[type]); |
| 562 | printf(" %d bytes differ\n",ndif); |
| 563 | } |
| 564 | if (pfnum < firstfree || pfnum > maxfree) { |
| 565 | printf("page number out of range:\n"); |
| 566 | printf("\tpage %x type %s pid %d\n", pfnum, typepg[type], pid); |
| 567 | return; |
| 568 | } |
| 569 | if (bad(zp, type)) { |
| 570 | printf("dup page pte %x", *(int *)pte); |
| 571 | dumpcm("", pte->pg_pfnum); |
| 572 | dump(zp); |
| 573 | printf("pte %x and as %s in pid %d\n", zp->z_pte, typepg[type], pid); |
| 574 | return; |
| 575 | } |
| 576 | zp->z_type = type; |
| 577 | zp->z_count++; |
| 578 | zp->z_pid = pid; |
| 579 | zp->z_pte = *pte; |
| 580 | } |
| 581 | |
| 582 | bad(zp, type) |
| 583 | struct paginfo *zp; |
| 584 | { |
| 585 | if (type == ZTEXT) { |
| 586 | if (zp->z_type != 0 && zp->z_type != ZTEXT) |
| 587 | return (1); |
| 588 | return (0); |
| 589 | } |
| 590 | return (zp->z_count); |
| 591 | } |
| 592 | |
| 593 | dump(zp) |
| 594 | struct paginfo *zp; |
| 595 | { |
| 596 | |
| 597 | printf("page %x type %s pid %d ", zp - paginfo, typepg[zp->z_type], zp->z_pid); |
| 598 | } |
| 599 | |
| 600 | summary() |
| 601 | { |
| 602 | register int i; |
| 603 | register struct paginfo *zp; |
| 604 | register int pfnum; |
| 605 | |
| 606 | for (i = firstfree + UPAGES; i < maxfree; i++) { |
| 607 | zp = &paginfo[i]; |
| 608 | if (zp->z_type == ZLOST) |
| 609 | dumpcm("lost", i); |
| 610 | pfnum = pgtocm(i); |
| 611 | if (cmap[pfnum].c_lock && cmap[pfnum].c_type != CSYS) |
| 612 | dumpcm("locked", i); |
| 613 | if (mflg) |
| 614 | dumpcm("mem", i); |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | char *tynames[] = { |
| 619 | "sys", |
| 620 | "text", |
| 621 | "data", |
| 622 | "stack" |
| 623 | }; |
| 624 | dumpcm(cp, pg) |
| 625 | char *cp; |
| 626 | int pg; |
| 627 | { |
| 628 | int pslot; |
| 629 | int cm; |
| 630 | register struct cmap *c; |
| 631 | |
| 632 | printf("%s page %x ", cp, pg); |
| 633 | cm = pgtocm(pg); |
| 634 | c = &cmap[cm]; |
| 635 | printf("\t[%x, %x", c->c_page, c->c_ndx); |
| 636 | if (c->c_type != CTEXT) |
| 637 | printf(" (=pid %d)", proc[c->c_ndx].p_pid); |
| 638 | else { |
| 639 | pslot=(text[c->c_ndx].x_caddr - (struct proc *)nl[X_PROC].n_value); |
| 640 | printf(" (=pid"); |
| 641 | for(;;) { |
| 642 | printf(" %d", proc[pslot].p_pid); |
| 643 | if (proc[pslot].p_xlink == 0) |
| 644 | break; |
| 645 | pslot=(proc[pslot].p_xlink - (struct proc *)nl[X_PROC].n_value); |
| 646 | } |
| 647 | printf(")"); |
| 648 | } |
| 649 | printf("] "); |
| 650 | printf(tynames[c->c_type]); |
| 651 | if (c->c_free) |
| 652 | printf(" free"); |
| 653 | if (c->c_gone) |
| 654 | printf(" gone"); |
| 655 | if (c->c_lock) |
| 656 | printf(" lock"); |
| 657 | if (c->c_want) |
| 658 | printf(" want"); |
| 659 | if (c->c_intrans) |
| 660 | printf(" intrans"); |
| 661 | if (c->c_blkno) |
| 662 | printf(" blkno %x mdev %d", c->c_blkno, c->c_mdev); |
| 663 | printf("\n"); |
| 664 | } |
| 665 | |
| 666 | fixfree() |
| 667 | { |
| 668 | register int i, next, prev; |
| 669 | |
| 670 | next = CMHEAD; |
| 671 | for (i=freemem/CLSIZE; --i >=0; ) { |
| 672 | prev = next; |
| 673 | next = cmap[next].c_next; |
| 674 | if (cmap[next].c_free == 0) { |
| 675 | printf("link to non free block: in %x to %x\n", cmtopg(prev), cmtopg(next)); |
| 676 | dumpcm("bad free link in", cmtopg(prev)); |
| 677 | dumpcm("to non free block", cmtopg(next)); |
| 678 | } |
| 679 | if (cmtopg(next) > maxfree) { |
| 680 | printf("free list link out of range: in %x to %x\n", cmtopg(prev), cmtopg(next)); |
| 681 | dumpcm("bad link in", cmtopg(prev)); |
| 682 | } |
| 683 | paginfo[cmtopg(next)].z_type = ZFREE; |
| 684 | if (fflg) |
| 685 | dumpcm("free", cmtopg(next)); |
| 686 | paginfo[cmtopg(next)+1].z_type = ZFREE; |
| 687 | if (fflg) |
| 688 | dumpcm("free", cmtopg(next)+1); |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | get(loc) |
| 693 | unsigned loc; |
| 694 | { |
| 695 | int x; |
| 696 | |
| 697 | lseek(fcore, (long)clear(loc), 0); |
| 698 | if (read(fcore, (char *)&x, sizeof (int)) != sizeof (int)) { |
| 699 | perror("read"); |
| 700 | fprintf(stderr, "get failed on %x\n", clear(loc)); |
| 701 | return (0); |
| 702 | } |
| 703 | return (x); |
| 704 | } |
| 705 | /* |
| 706 | * Convert a virtual page number |
| 707 | * to its corresponding disk block number. |
| 708 | * Used in pagein/pageout to initiate single page transfers. |
| 709 | */ |
| 710 | vtod(p, v, dmap, smap) |
| 711 | register struct proc *p; |
| 712 | register struct dmap *dmap, *smap; |
| 713 | { |
| 714 | struct dblock db; |
| 715 | |
| 716 | if (v < p->p_tsize) |
| 717 | return(p->p_textp->x_daddr[v / DMTEXT] + v % DMTEXT); |
| 718 | if (isassv(p, v)) |
| 719 | vstodb(vtosp(p, v), 1, smap, &db, 1); |
| 720 | else |
| 721 | vstodb(vtodp(p, v), 1, dmap, &db, 0); |
| 722 | return (db.db_base); |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * Convert a pte pointer to |
| 727 | * a virtual page number. |
| 728 | */ |
| 729 | ptetov(p, pte) |
| 730 | register struct proc *p; |
| 731 | register struct pte *pte; |
| 732 | { |
| 733 | |
| 734 | if (isatpte(p, pte)) |
| 735 | return (tptov(p, ptetotp(p, pte))); |
| 736 | else if (isadpte(p, pte)) |
| 737 | return (dptov(p, ptetodp(p, pte))); |
| 738 | else |
| 739 | return (sptov(p, ptetosp(p, pte))); |
| 740 | } |
| 741 | |
| 742 | /* |
| 743 | * Given a base/size pair in virtual swap area, |
| 744 | * return a physical base/size pair which is the |
| 745 | * (largest) initial, physically contiguous block. |
| 746 | */ |
| 747 | vstodb(vsbase, vssize, dmp, dbp, rev) |
| 748 | register int vsbase; |
| 749 | int vssize; |
| 750 | register struct dmap *dmp; |
| 751 | register struct dblock *dbp; |
| 752 | { |
| 753 | register int blk = DMMIN; |
| 754 | register swblk_t *ip = dmp->dm_map; |
| 755 | |
| 756 | if (vsbase < 0 || vsbase + vssize > dmp->dm_size) |
| 757 | panic("vstodb"); |
| 758 | while (vsbase >= blk) { |
| 759 | vsbase -= blk; |
| 760 | if (blk < DMMAX) |
| 761 | blk *= 2; |
| 762 | ip++; |
| 763 | } |
| 764 | dbp->db_size = min(vssize, blk - vsbase); |
| 765 | dbp->db_base = *ip + (rev ? blk - (vsbase + vssize) : vsbase); |
| 766 | } |
| 767 | |
| 768 | panic(cp) |
| 769 | char *cp; |
| 770 | { |
| 771 | printf("panic!: %s\n", cp); |
| 772 | } |
| 773 | |
| 774 | min(a, b) |
| 775 | { |
| 776 | return (a < b ? a : b); |
| 777 | } |