| 24 |
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| 25 |
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#include <errno.h> |
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| 27 |
+ |
extern int errno; |
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+ |
|
| 29 |
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#ifdef MSTATS |
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#include <stdio.h> |
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< |
static unsigned b_nsbrked = 0; |
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> |
static unsigned b_nsbrked = 0; |
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static unsigned b_nalloced = 0; |
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static unsigned b_nfreed = 0; |
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static unsigned b_nscrounged = 0; |
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|
| 68 |
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static ALIGN dummy_mem; |
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|
| 70 |
+ |
static char *memlim[2]; |
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|
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#define DUMMYLOC ((char *)&dummy_mem) |
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|
| 74 |
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#define BADPTR(p) ((p) < memlim[0] | (p) >= memlim[1]) |
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|
| 76 |
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#ifdef MCOMP /* memory compaction routines */ |
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static char seedtab[1024]; /* seed for compaction table */ |
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| 247 |
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#endif |
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bpos += nrem & (BYTES_WORD-1); /* align pointer */ |
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nrem &= ~(BYTES_WORD-1); |
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+ |
memlim[0] = bpos; |
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+ |
memlim[1] = bpos + nrem; |
| 252 |
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} |
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|
| 254 |
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n = (n+(BYTES_WORD-1))&~(BYTES_WORD-1); /* word align rqst. */ |
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nrem = thisamnt; |
| 277 |
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} else /* otherwise tack on */ |
| 278 |
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nrem += thisamnt; |
| 279 |
+ |
if (bpos < memlim[0]) |
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+ |
memlim[0] = bpos; |
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+ |
if (bpos + nrem > memlim[1]) |
| 282 |
+ |
memlim[1] = bpos + nrem; |
| 283 |
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} |
| 284 |
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p = bpos; |
| 285 |
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bpos += n; /* advance */ |
| 309 |
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p += bsiz; |
| 310 |
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n -= bsiz; |
| 311 |
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} |
| 312 |
+ |
if (p < memlim[0]) |
| 313 |
+ |
memlim[0] = p; |
| 314 |
+ |
if (p + n > memlim[1]) |
| 315 |
+ |
memlim[1] = p + n; |
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/* fill big buckets first */ |
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for (bucket = NBUCKETS-1, bsiz = 1<<(NBUCKETS-1); |
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bucket >= FIRSTBUCKET; bucket--, bsiz >>= 1) |
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malloc(n) /* allocate n bytes of memory */ |
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unsigned n; |
| 331 |
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{ |
| 316 |
– |
extern int errno; |
| 332 |
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register M_HEAD *mp; |
| 333 |
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register int bucket; |
| 334 |
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register unsigned bsiz; |
| 370 |
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char *p; |
| 371 |
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register unsigned on; |
| 372 |
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/* get old size */ |
| 373 |
< |
if (op != NULL && op != DUMMYLOC && ((M_HEAD *)op-1)->a.magic == MAGIC) |
| 373 |
> |
if (op != DUMMYLOC && !BADPTR(op) && |
| 374 |
> |
((M_HEAD *)op-1)->a.magic == MAGIC) |
| 375 |
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on = 1 << ((M_HEAD *)op-1)->a.bucket; |
| 376 |
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else |
| 377 |
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on = 0; |
| 397 |
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register M_HEAD *mp; |
| 398 |
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register int bucket; |
| 399 |
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|
| 400 |
< |
if (p == NULL | p == DUMMYLOC) |
| 400 |
> |
if (p == DUMMYLOC) |
| 401 |
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return(1); |
| 402 |
+ |
if (BADPTR(p)) |
| 403 |
+ |
goto invalid; |
| 404 |
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mp = (M_HEAD *)p - 1; |
| 405 |
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if (mp->a.magic != MAGIC) /* sanity check */ |
| 406 |
< |
return(0); |
| 406 |
> |
goto invalid; |
| 407 |
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bucket = mp->a.bucket; |
| 408 |
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if (bucket < FIRSTBUCKET | bucket >= NBUCKETS) |
| 409 |
< |
return(0); |
| 409 |
> |
goto invalid; |
| 410 |
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mp->next = free_list[bucket]; |
| 411 |
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free_list[bucket] = mp; |
| 412 |
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#ifdef MSTATS |
| 413 |
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m_nfreed += (1 << bucket) + sizeof(M_HEAD); |
| 414 |
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#endif |
| 415 |
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return(1); |
| 416 |
+ |
invalid: |
| 417 |
+ |
errno = EINVAL; |
| 418 |
+ |
return(0); |
| 419 |
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} |
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