2008-11-12 05:55:19 +01:00
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#include "sh.h"
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2008-11-13 00:34:02 +01:00
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__RCSID("$MirOS: src/bin/mksh/aalloc.c,v 1.25 2008/11/12 23:34:02 tg Exp $");
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2008-11-12 05:55:19 +01:00
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/* mksh integration of aalloc */
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#ifndef AALLOC_ABORT
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#define AALLOC_ABORT internal_errorf
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#endif
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#ifndef AALLOC_WARN
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#define AALLOC_WARN internal_warningf
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#endif
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2008-11-13 00:34:02 +01:00
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#define AALLOC_LEAK_SILENT /* the code does not yet clean up at exit */
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2008-11-12 05:55:19 +01:00
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#ifndef AALLOC_RANDOM
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#if HAVE_ARC4RANDOM
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#define AALLOC_RANDOM() arc4random()
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#else
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#define AALLOC_RANDOM() (rand() * RAND_MAX + rand())
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#endif
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#endif
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#ifdef DEBUG
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#define AALLOC_DEBUG
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#endif
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/* generic area-based allocator built for mmap malloc or omalloc */
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#define PVALIGN (sizeof (void *))
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#define PVMASK (sizeof (void *) - 1)
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#ifndef AALLOC_INITSZ
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2008-11-12 06:46:14 +01:00
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#define AALLOC_INITSZ (64 * PVALIGN) /* at least 4 pointers */
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2008-11-12 05:55:19 +01:00
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#endif
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typedef /* unsigned */ ptrdiff_t TCookie;
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typedef union {
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TCookie iv;
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2008-11-12 06:11:05 +01:00
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char *pv;
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2008-11-12 05:55:19 +01:00
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} TPtr;
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/*
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* The separation between TBlock and TArea does not seem to make
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* sense at first, especially in the !AALLOC_TRACK case, but is
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* necessary to keep PArea values constant even if the storage is
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* enlarged. While we could use an extensible array to keep track
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* of the TBlock instances, kind of like we use TBlock.storage to
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* track the allocations, it would require another TBlock member
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* and a fair amount of backtracking; since omalloc can optimise
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* pointer sized allocations like a !AALLOC_TRACK TArea, we don't
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* do that then.
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*/
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struct TBlock {
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TCookie cookie;
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2008-11-12 06:11:05 +01:00
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char *endp;
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char *last;
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2008-11-12 05:55:19 +01:00
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void *storage;
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};
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typedef struct TBlock *PBlock;
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struct TArea {
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TPtr bp;
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#ifdef AALLOC_TRACK
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TPtr prev;
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TCookie ocookie;
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#endif
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};
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2008-11-12 08:36:19 +01:00
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static TCookie global_cookie;
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2008-11-12 07:10:51 +01:00
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#ifdef AALLOC_NO_COOKIES
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2008-11-12 08:36:19 +01:00
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#define gcookie 0
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#else
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#define gcookie global_cookie
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2008-11-12 07:10:51 +01:00
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#endif
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2008-11-12 05:55:19 +01:00
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#ifdef AALLOC_TRACK
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static PArea track;
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static void track_check(void);
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#endif
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#ifdef AALLOC_MPROTECT
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#undef AALLOC_INITSZ
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#define AALLOC_INITSZ pagesz
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2008-11-12 06:55:43 +01:00
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static long pagesz;
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2008-11-12 06:32:34 +01:00
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#define AALLOC_ALLOW(bp) mprotect((bp), (bp)->endp - (char *)(bp), \
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PROT_READ | PROT_WRITE)
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#define AALLOC_DENY(bp) mprotect((bp), (bp)->endp - (char *)(bp), \
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PROT_NONE)
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#define AALLOC_PEEK(bp) mprotect((bp), sizeof (struct TArea), \
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PROT_READ | PROT_WRITE)
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2008-11-12 05:55:19 +01:00
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#else
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#define AALLOC_ALLOW(bp) /* nothing */
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#define AALLOC_DENY(bp) /* nothing */
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#define AALLOC_PEEK(bp) /* nothing */
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#endif
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/*
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* Some nice properties: allocations are always PVALIGNed, which
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* includes the pointers seen by our user, the forward and back
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* pointers, the AALLOC_TRACK prev pointer, etc.
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*/
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2008-11-12 20:23:09 +01:00
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#define safe_malloc(dest, len) do { \
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(dest) = malloc((len)); \
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safe_xalloc_common((dest), (len)); \
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} while (/* CONSTCOND */ 0)
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2008-11-12 05:55:19 +01:00
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#define safe_realloc(dest, len) do { \
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2008-11-12 20:23:09 +01:00
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(dest) = realloc((dest), (len)); \
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safe_xalloc_common((dest), (len)); \
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} while (/* CONSTCOND */ 0)
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#define safe_xalloc_common(dest, len) do { \
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if ((dest) == NULL) \
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2008-11-12 06:55:43 +01:00
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AALLOC_ABORT("unable to allocate %lu bytes: %s", \
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(unsigned long)(len), strerror(errno)); \
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2008-11-12 05:59:42 +01:00
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if ((ptrdiff_t)(dest) & PVMASK) \
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2008-11-12 05:55:19 +01:00
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AALLOC_ABORT("unaligned malloc result: %p", (dest)); \
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} while (/* CONSTCOND */ 0)
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#define MUL_NO_OVERFLOW (1UL << (sizeof (size_t) * 8 / 2))
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#define safe_muladd(nmemb, size, extra) do { \
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if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) && \
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nmemb > 0 && SIZE_MAX / nmemb < size) \
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2008-11-12 06:55:43 +01:00
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AALLOC_ABORT("attempted integer overflow: %lu * %lu", \
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(unsigned long)nmemb, (unsigned long)size); \
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2008-11-12 05:55:19 +01:00
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size *= nmemb; \
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if (size >= SIZE_MAX - extra) \
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2008-11-12 06:55:43 +01:00
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AALLOC_ABORT("unable to allocate %lu bytes: %s", \
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(unsigned long)size, "value plus extra too big"); \
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2008-11-12 06:46:45 +01:00
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size += extra; \
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2008-11-12 05:55:19 +01:00
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} while (/* CONSTCOND */ 0)
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2008-11-12 07:38:08 +01:00
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static void adelete_leak(PArea, PBlock, bool, const char *);
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2008-11-12 05:55:19 +01:00
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static PBlock check_bp(PArea, const char *, TCookie);
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static TPtr *check_ptr(void *, PArea, PBlock *, const char *, const char *);
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PArea
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anew(void)
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{
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PArea ap;
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PBlock bp;
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2008-11-12 07:05:54 +01:00
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#ifdef AALLOC_MPROTECT
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if (!pagesz) {
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if ((pagesz = sysconf(_SC_PAGESIZE)) == -1 ||
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(size_t)pagesz < (size_t)PVALIGN)
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AALLOC_ABORT("sysconf(_SC_PAGESIZE) failed: %ld %s",
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pagesz, strerror(errno));
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}
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#endif
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2008-11-12 05:55:19 +01:00
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#ifdef AALLOC_DEBUG
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if (PVALIGN != 2 && PVALIGN != 4 && PVALIGN != 8 && PVALIGN != 16)
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2008-11-12 06:55:43 +01:00
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AALLOC_ABORT("PVALIGN not a power of two: %lu",
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(unsigned long)PVALIGN);
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2008-11-12 05:55:19 +01:00
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if (sizeof (TPtr) != sizeof (TCookie) || sizeof (TPtr) != PVALIGN)
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2008-11-12 06:55:43 +01:00
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AALLOC_ABORT("TPtr sizes do not match: %lu, %lu, %lu",
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(unsigned long)sizeof (TPtr),
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(unsigned long)sizeof (TCookie), (unsigned long)PVALIGN);
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2008-11-12 07:05:54 +01:00
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if ((size_t)AALLOC_INITSZ < sizeof (struct TBlock))
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2008-11-12 06:55:43 +01:00
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AALLOC_ABORT("AALLOC_INITSZ constant too small: %lu < %lu",
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(unsigned long)AALLOC_INITSZ,
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(unsigned long)sizeof (struct TBlock));
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2008-11-12 05:55:19 +01:00
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#endif
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2008-11-12 08:36:19 +01:00
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if (!global_cookie) {
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2008-11-12 05:55:19 +01:00
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size_t v;
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/* ensure unaligned cookie */
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do {
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2008-11-12 08:36:19 +01:00
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global_cookie = AALLOC_RANDOM();
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2008-11-12 05:55:19 +01:00
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v = AALLOC_RANDOM() & 7;
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2008-11-12 08:36:19 +01:00
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} while (!(global_cookie & PVMASK) || !v);
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2008-11-12 05:55:19 +01:00
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/* randomise seed afterwards */
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while (v--)
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AALLOC_RANDOM();
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#ifdef AALLOC_TRACK
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atexit(track_check);
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#endif
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}
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2008-11-12 20:23:09 +01:00
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safe_malloc(ap, sizeof (struct TArea));
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safe_malloc(bp, AALLOC_INITSZ);
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2008-11-12 05:55:19 +01:00
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/* ensure unaligned cookie */
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2008-11-12 07:10:51 +01:00
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#ifdef AALLOC_NO_COOKIES
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2008-11-12 06:40:23 +01:00
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bp->cookie = 0;
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2008-11-12 07:10:51 +01:00
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#else
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do {
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bp->cookie = AALLOC_RANDOM();
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} while (!(bp->cookie & PVMASK));
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#endif
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2008-11-12 05:55:19 +01:00
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/* first byte after block */
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2008-11-12 06:11:05 +01:00
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bp->endp = (char *)bp + AALLOC_INITSZ; /* bp + size of the block */
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2008-11-12 05:55:19 +01:00
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/* next entry (forward pointer) available for new allocation */
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2008-11-12 06:11:05 +01:00
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bp->last = (char *)&bp->storage; /* first entry */
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2008-11-12 05:55:19 +01:00
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2008-11-12 06:11:05 +01:00
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ap->bp.pv = (char *)bp;
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2008-11-12 05:55:19 +01:00
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ap->bp.iv ^= gcookie;
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#ifdef AALLOC_TRACK
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2008-11-12 06:32:34 +01:00
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ap->prev.pv = (char *)track;
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ap->prev.iv ^= gcookie;
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2008-11-12 05:55:19 +01:00
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ap->ocookie = bp->cookie ^ gcookie;
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track = ap;
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#endif
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AALLOC_DENY(bp);
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return (ap);
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}
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/*
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* Validate block in Area “ap”, return unlocked block pointer.
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* If “ocookie” is not 0, make sure block cookie is equal.
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*/
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static PBlock
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check_bp(PArea ap, const char *funcname, TCookie ocookie)
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{
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TPtr p;
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PBlock bp;
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if (ap->bp.pv == NULL) {
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AALLOC_WARN("%s: area %p already freed", funcname, ap);
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return (NULL);
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}
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p.iv = ap->bp.iv ^ gcookie;
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2008-11-12 06:11:05 +01:00
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if ((ptrdiff_t)(bp = (PBlock)p.pv) & PVMASK) {
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2008-11-12 06:55:43 +01:00
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AALLOC_WARN("%s: area %p block pointer destroyed: %p",
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funcname, ap, p.pv);
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2008-11-12 05:55:19 +01:00
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return (NULL);
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}
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AALLOC_PEEK(bp);
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if (ocookie && bp->cookie != ocookie) {
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2008-11-12 06:55:43 +01:00
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AALLOC_WARN("%s: block %p cookie destroyed: %p, %p",
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funcname, bp, (void *)ocookie, (void *)bp->cookie);
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2008-11-12 05:55:19 +01:00
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return (NULL);
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}
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2008-11-12 05:59:42 +01:00
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if (((ptrdiff_t)bp->endp & PVMASK) || ((ptrdiff_t)bp->last & PVMASK)) {
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2008-11-12 05:55:19 +01:00
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AALLOC_WARN("%s: block %p data structure destroyed: %p, %p",
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funcname, bp, bp->endp, bp->last);
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return (NULL);
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}
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2008-11-12 06:11:05 +01:00
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if (bp->endp < (char *)bp) {
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2008-11-12 05:55:19 +01:00
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AALLOC_WARN("%s: block %p end pointer out of bounds: %p",
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funcname, bp, bp->endp);
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return (NULL);
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}
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2008-11-12 06:27:01 +01:00
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if ((bp->last < (char *)&bp->storage) || (bp->last > bp->endp)) {
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2008-11-12 05:55:19 +01:00
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AALLOC_WARN("%s: block %p last pointer out of bounds: "
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"%p < %p < %p", funcname, bp, &bp->storage, bp->last,
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bp->endp);
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return (NULL);
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}
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AALLOC_ALLOW(bp);
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return (bp);
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}
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#ifdef AALLOC_TRACK
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/*
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* At exit, dump and free any leaked allocations, blocks and areas.
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*/
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static void
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track_check(void)
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{
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2008-11-12 08:36:19 +01:00
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PArea tp;
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TPtr lp;
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2008-11-12 05:55:19 +01:00
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PBlock bp;
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while (track) {
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2008-11-12 08:36:19 +01:00
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tp = track;
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tp->ocookie ^= gcookie;
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lp.iv = tp->prev.iv ^ gcookie;
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if ((lp.iv & PVMASK)
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#ifndef AALLOC_NO_COOKIES
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|| !(tp->ocookie & PVMASK)
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#endif
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) {
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2008-11-12 05:55:19 +01:00
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/* buffer overflow or something? */
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AALLOC_WARN("AALLOC_TRACK data structure %p destroyed:"
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2008-11-12 08:36:19 +01:00
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" %p, %p, %p; exiting", tp, lp.pv, tp->bp.pv,
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(void *)tp->ocookie);
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2008-11-12 05:55:19 +01:00
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return;
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}
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2008-11-12 08:36:19 +01:00
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if (!(bp = check_bp(tp, "atexit:track_check", tp->ocookie)))
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2008-11-12 05:55:19 +01:00
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goto track_next;
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2008-11-12 07:44:04 +01:00
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if (bp->last != (char *)&bp->storage)
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2008-11-13 00:34:02 +01:00
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#ifdef AALLOC_LEAK_SILENT
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2008-11-12 08:36:19 +01:00
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adelete_leak(tp, bp, false, "at exit");
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2008-11-12 07:42:22 +01:00
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#else
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2008-11-12 08:36:19 +01:00
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adelete_leak(tp, bp, true, "at exit");
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2008-11-12 07:44:04 +01:00
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else
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2008-11-12 08:36:19 +01:00
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AALLOC_WARN("leaking empty area %p (%p %lu)", tp,
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2008-11-12 07:44:04 +01:00
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bp, (unsigned long)(bp->endp - (char *)bp));
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2008-11-12 07:42:22 +01:00
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#endif
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2008-11-12 05:55:19 +01:00
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free(bp);
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track_next:
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2008-11-12 08:36:19 +01:00
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track = (PArea)lp.pv;
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free(tp);
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2008-11-12 05:55:19 +01:00
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}
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}
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#endif
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2008-11-12 06:05:17 +01:00
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static void
|
2008-11-12 07:38:08 +01:00
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adelete_leak(PArea ap, PBlock bp, bool always_warn, const char *when)
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2008-11-12 06:05:17 +01:00
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|
{
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TPtr *cp;
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2008-11-12 06:11:05 +01:00
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while (bp->last > (char *)&bp->storage) {
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2008-11-12 06:05:17 +01:00
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bp->last -= PVALIGN;
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cp = *((void **)bp->last);
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cp->iv ^= bp->cookie;
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2008-11-12 07:38:08 +01:00
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if (always_warn || cp->pv != bp->last)
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2008-11-12 07:14:26 +01:00
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AALLOC_WARN("leaking %s pointer %p in area %p (%p %lu) %s",
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2008-11-12 06:05:17 +01:00
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cp->pv == bp->last ? "valid" : "underflown",
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2008-11-12 06:55:43 +01:00
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(char *)cp + PVALIGN, ap, bp,
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2008-11-12 07:14:26 +01:00
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(unsigned long)(bp->endp - (char *)bp), when);
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2008-11-12 06:05:17 +01:00
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free(cp);
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}
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}
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2008-11-12 05:55:19 +01:00
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void
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adelete(PArea *pap)
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{
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#ifdef AALLOC_TRACK
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PArea tp;
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2008-11-12 08:36:19 +01:00
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TPtr lp;
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2008-11-12 05:55:19 +01:00
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#endif
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PBlock bp;
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2008-11-12 06:05:17 +01:00
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/* ignore invalid areas */
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2008-11-12 07:12:56 +01:00
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if ((bp = check_bp(*pap, "adelete", 0)) != NULL) {
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2008-11-12 06:11:05 +01:00
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if (bp->last != (char *)&bp->storage)
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2008-11-12 07:38:08 +01:00
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adelete_leak(*pap, bp, false, "in adelete");
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2008-11-12 06:05:17 +01:00
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free(bp);
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}
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2008-11-12 05:55:19 +01:00
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#ifdef AALLOC_TRACK
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if (track == *pap) {
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(*pap)->prev.iv ^= gcookie;
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2008-11-12 06:32:34 +01:00
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track = (PArea)((*pap)->prev.pv);
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2008-11-12 05:55:19 +01:00
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goto adelete_tracked;
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}
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/* find the TArea whose prev is *pap */
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tp = track;
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while (tp) {
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lp.iv = tp->prev.iv ^ gcookie;
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2008-11-12 08:36:19 +01:00
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if ((lp.iv & PVMASK)
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#ifndef AALLOC_NO_COOKIES
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|| !((tp->ocookie ^ gcookie) & PVMASK)
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#endif
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) {
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/* buffer overflow or something? */
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2008-11-12 05:55:19 +01:00
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AALLOC_WARN("AALLOC_TRACK data structure %p destroyed:"
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2008-11-12 08:36:19 +01:00
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" %p, %p, %p; exiting", tp, lp.pv, tp->bp.pv,
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(void *)(tp->ocookie ^ gcookie));
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2008-11-12 05:55:19 +01:00
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tp = NULL;
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break;
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}
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2008-11-12 06:32:34 +01:00
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if (lp.pv == (char *)*pap)
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2008-11-12 05:55:19 +01:00
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break;
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2008-11-12 06:32:34 +01:00
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tp = (PArea)lp.pv;
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2008-11-12 05:55:19 +01:00
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}
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if (tp)
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tp->prev.iv = (*pap)->prev.iv; /* decouple *pap */
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else
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AALLOC_WARN("area %p not in found AALLOC_TRACK data structure",
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*pap);
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adelete_tracked:
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#endif
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free(*pap);
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*pap = NULL;
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}
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void *
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alloc(size_t nmemb, size_t size, PArea ap)
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{
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PBlock bp;
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TPtr *ptr;
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/* obtain the memory region requested, retaining guards */
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safe_muladd(nmemb, size, sizeof (TPtr));
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2008-11-12 20:23:09 +01:00
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safe_malloc(ptr, size);
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2008-11-12 05:55:19 +01:00
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/* chain into area */
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if ((bp = check_bp(ap, "alloc", 0)) == NULL)
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AALLOC_ABORT("cannot continue");
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if (bp->last == bp->endp) {
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2008-11-12 07:58:49 +01:00
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TPtr **tp;
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2008-11-12 05:55:19 +01:00
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size_t bsz;
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/* make room for more forward ptrs in the block allocation */
|
2008-11-12 06:11:05 +01:00
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bsz = bp->endp - (char *)bp;
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2008-11-12 06:55:43 +01:00
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safe_muladd(2, bsz, 0);
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2008-11-12 05:55:19 +01:00
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safe_realloc(bp, bsz);
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2008-11-12 06:27:01 +01:00
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bp->last = (char *)bp + (bsz / 2);
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bp->endp = (char *)bp + bsz;
|
2008-11-12 05:55:19 +01:00
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2008-11-12 06:45:28 +01:00
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/* all backpointers have to be adjusted */
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2008-11-12 07:58:49 +01:00
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for (tp = (TPtr **)&bp->storage; tp < (TPtr **)bp->last; ++tp) {
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(*tp)->pv = (char *)tp;
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(*tp)->iv ^= bp->cookie;
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2008-11-12 06:45:28 +01:00
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}
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2008-11-12 05:55:19 +01:00
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/* “bp” has possibly changed, enter its new value into ap */
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2008-11-12 06:11:05 +01:00
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ap->bp.pv = (char *)bp;
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2008-11-12 05:55:19 +01:00
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ap->bp.iv ^= gcookie;
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}
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*((void **)bp->last) = ptr; /* next available forward ptr */
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ptr->pv = bp->last; /* backpointer to fwdptr storage */
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ptr->iv ^= bp->cookie; /* apply block cookie */
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bp->last += PVALIGN; /* advance next-avail pointer */
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AALLOC_DENY(bp);
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/* return aligned storage just after the cookied backpointer */
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return ((char *)ptr + PVALIGN);
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}
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|
void *
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|
|
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aresize(void *vp, size_t nmemb, size_t size, PArea ap)
|
|
|
|
{
|
|
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PBlock bp;
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TPtr *ptr;
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if (vp == NULL)
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return (alloc(nmemb, size, ap));
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|
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/* validate allocation and backpointer against forward pointer */
|
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|
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if ((ptr = check_ptr(vp, ap, &bp, "aresize", "")) == NULL)
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AALLOC_ABORT("cannot continue");
|
|
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/* move allocation to size and possibly new location */
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safe_muladd(nmemb, size, sizeof (TPtr));
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|
safe_realloc(ptr, size);
|
|
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/* write new address of allocation into the block forward pointer */
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memcpy(ptr->pv, &ptr, PVALIGN);
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/* apply the cookie on the backpointer again */
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|
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ptr->iv ^= bp->cookie;
|
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|
AALLOC_DENY(bp);
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|
return ((char *)ptr + PVALIGN);
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|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Try to find “vp” inside Area “ap”, use “what” and “extra” for error msgs.
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|
|
*
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|
* If an error occurs, returns NULL with no side effects.
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|
* Otherwise, returns address of the allocation, with the cookie on the
|
|
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|
* backpointer unapplied; *bpp contains the unlocked block pointer.
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|
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|
*/
|
|
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|
static TPtr *
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|
|
|
check_ptr(void *vp, PArea ap, PBlock *bpp, const char *what, const char *extra)
|
|
|
|
{
|
|
|
|
PBlock bp;
|
|
|
|
TPtr *ptr;
|
|
|
|
|
2008-11-12 05:59:42 +01:00
|
|
|
if ((ptrdiff_t)vp & PVMASK) {
|
2008-11-12 05:55:19 +01:00
|
|
|
AALLOC_WARN("trying to %s rogue unaligned pointer %p from "
|
|
|
|
"area %p%s", what + 1, vp, ap, extra);
|
|
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|
return (NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
ptr = (TPtr *)((char *)vp - PVALIGN);
|
|
|
|
if (!ptr->iv) {
|
|
|
|
AALLOC_WARN("trying to %s already freed pointer %p from "
|
|
|
|
"area %p%s", what + 1, vp, ap, extra);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((bp = check_bp(ap, what, 0)) == NULL)
|
|
|
|
AALLOC_ABORT("cannot continue");
|
|
|
|
ptr->iv ^= bp->cookie;
|
2008-11-12 06:11:05 +01:00
|
|
|
if (ptr->pv < (char *)&bp->storage || ptr->pv >= bp->last) {
|
2008-11-12 05:55:19 +01:00
|
|
|
AALLOC_WARN("trying to %s rogue pointer %p from area %p "
|
|
|
|
"(block %p..%p), backpointer %p out of bounds%s",
|
|
|
|
what + 1, vp, ap, bp, bp->last, ptr->pv, extra);
|
|
|
|
AALLOC_DENY(bp);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
if (*((void **)ptr->pv) != ptr) {
|
|
|
|
AALLOC_WARN("trying to %s rogue pointer %p from area %p "
|
|
|
|
"(block %p..%p), backpointer %p, forward pointer to "
|
|
|
|
"%p instead%s", what + 1, vp, ap, bp, bp->last,
|
|
|
|
ptr->pv, *((void **)ptr->pv), extra);
|
|
|
|
AALLOC_DENY(bp);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
*bpp = bp;
|
|
|
|
return (ptr);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
afree(void *vp, PArea ap)
|
|
|
|
{
|
|
|
|
PBlock bp;
|
|
|
|
TPtr *ptr;
|
|
|
|
|
|
|
|
if (vp == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* validate allocation and backpointer, ignore rogues */
|
|
|
|
if ((ptr = check_ptr(vp, ap, &bp, "afree", ", ignoring")) == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* note: the block allocation does not ever shrink */
|
|
|
|
bp->last -= PVALIGN; /* mark the last forward pointer as free */
|
|
|
|
/* if our forward pointer was not the last one, relocate the latter */
|
|
|
|
if (ptr->pv < bp->last) {
|
2008-11-12 07:35:27 +01:00
|
|
|
TPtr *tmp = *((TPtr **)bp->last);
|
2008-11-12 05:55:19 +01:00
|
|
|
|
2008-11-12 07:35:27 +01:00
|
|
|
/* tmp is the former last forward pointer */
|
2008-11-12 05:55:19 +01:00
|
|
|
tmp->pv = ptr->pv; /* its backpointer to former our … */
|
|
|
|
tmp->iv ^= bp->cookie; /* … forward pointer, and cookie it */
|
|
|
|
|
|
|
|
memcpy(ptr->pv, bp->last, PVALIGN); /* relocate fwd ptr */
|
|
|
|
}
|
|
|
|
ptr->iv = 0; /* our backpointer, just in case, for double frees */
|
|
|
|
free(ptr);
|
|
|
|
|
|
|
|
AALLOC_DENY(bp);
|
|
|
|
return;
|
|
|
|
}
|