Memory Leak N.
An Error In A Program's Dynamic-store
Allocation Logic That Causes It To Fail To Reclaim Discarded
Memory, Leading To Eventual Collapse Due To Memory Exhaustion.
An error in a program's dynamic-store
allocation logic that causes it to fail to reclaim discarded
memory, leading to eventual collapse due to memory exhaustion.
Also (esp. at CMU) called core leak. These problems were
severe on older machines with small, fixed-size address spaces, and
special "leak detection" tools were commonly written to root them
out. With the advent of virtual memory, it is unfortunately easier
to be sloppy about wasting a bit of memory (although when you run
out of memory on a VM machine, it means you've got a real
leak!). See aliasing bug, fandango on core,
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}....
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....
fandango on core: [UNIX/C hackers, from the Mexican dance] n.
In C, a wild pointer that runs out of bounds, causing a {core
dump}, or corrupts the `malloc(3)' {arena} in such a way as
to cause mysterious failures later on, is sometimes said to have
`done a fandango on core'....