:handle: n. 1. [from CB slang] An electronic pseudonym; a `nom
de guerre' intended to conceal the user's true identity. Network
and BBS handles function as the same sort of simultaneous
concealment and display one finds on Citizen's Band radio, from
which the term was adopted. Use of grandiose handles is
characteristic of {cracker}s, {weenie}s, {spod}s, and
other lower forms of network life; true hackers travel on their own
reputations rather than invented legendry. Compare
{nick}. 2. [Mac] A pointer to a pointer to dynamically-allocated
memory; the extra level of indirection allows on-the-fly memory
compaction (to cut down on fragmentation) or aging out of unused
resources, with minimal impact on the (possibly multiple) parts of
the larger program containing references to the allocated memory.
Compare {snap} (to snap a handle would defeat its purpose); see
also {aliasing bug}, {dangling pointer}.
-- The AI Hackers Dictionary
aliasing bug: n. A class of subtle programming errors that can
arise in code that does dynamic allocation, esp. via
`malloc(3)' or equivalent. If several pointers address
(`aliases for') a given hunk of storage, it may happen that the
storage is freed or reallocated (and thus moved) through one alias
and then referenced through another, which may lead to subtle (and
possibly intermittent) lossage depending on the state and the
allocation history of the malloc {arena}....
wizzle: v. To convert external names, array indice or references
within a data structure into address pointers when the data
structure is brought into main memory from external storage (also
called `pointer swizzling')...
aliasing bug n.
A class of subtle programming errors that
can arise in code that does dynamic allocation, esp. via
malloc(3) or equivalent. If several pointers address
(`aliases for') a given hunk of storage, it may happen that the
storage is freed or reallocated (and thus moved) through one alias
and then referenced through another, which may lead to subtle (and
possibly intermittent) lossage depending on the state and the
allocation history of the malloc arena....