fandango on core - definition. What is fandango on core
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OUT-OF-BOUNDS POINTER EFFECTS

fandango on core         
<jargon, programming> (Unix/C, from the Mexican dance) In C, a wild pointer that runs out of bounds, causing a core dump, or corrupts the malloc arena in such a way as to cause mysterious failures later on, is sometimes said to have "done a fandango on core". On low-end personal machines without an MMU, this can corrupt the operating system itself, causing massive lossage. Other frenetic dances such as the rhumba, cha-cha, or watusi, may be substituted. See aliasing bug, precedence lossage, smash the stack, memory leak, memory smash, overrun screw, core. [Jargon File] (1994-12-16)
Fandango on core         
Fandango on core is a computer programming term for the effects of a pointer running out of bounds, often leading to a core dump, or failures in other seemingly unrelated processes. In extreme situations, fandango on core may lead to the overwriting of operating system code, possibly causing data loss or system crashes.
main store         
  • Diagram of a 4×4 plane of magnetic core memory in an X/Y line coincident-current setup. X and Y are drive lines, S is sense, Z is inhibit. Arrows indicate the direction of current for writing.
  • A 10.8×10.8 cm plane of magnetic core memory with 64 x 64 bits (4 Kb), as used in a [[CDC 6600]]. Inset shows ''word line'' architecture with two wires per bit
  • Close-up of a core plane. The distance between the rings is roughly 1 mm (0.04 in). The green horizontal wires are X; the Y wires are dull brown and vertical, toward the back. The sense wires are diagonal, colored orange, and the inhibit wires are vertical twisted pairs.
  • One of three inter-connected modules that make up an Omnibus-based PDP-8 core memory plane.  This is the middle of the three and contains the array of actual ferrite cores.
  • One of three inter-connected modules that make up an Omnibus-based (PDP 8/e/f/m) PDP-8 core memory plane.
  • One of three inter-connected modules that make up an Omnibus-based PDP-8 core memory plane.
  • [[Project Whirlwind]] core memory
  • Diagram of the [[hysteresis]] curve for a magnetic memory core during a read operation. Sense line current pulse is high ("1") or low ("0") depending on original magnetization state of the core.
PREDOMINANT FORM OF RANDOM-ACCESS COMPUTER MEMORY FOR 20 YEARS BETWEEN ABOUT 1955 AND 1975
Ferrite core memory; Ferrite-core memory; Core store; Magnetic-Core Storage; Ferrite ram; Magnetic core storage; Core Memory; Main store; Magnetic core memory; Core memory; Core memories

ويكيبيديا

Fandango on core

Fandango on core is a computer programming term for the effects of a pointer running out of bounds, often leading to a core dump, or failures in other seemingly unrelated processes. In extreme situations, fandango on core may lead to the overwriting of operating system code, possibly causing data loss or system crashes. The advent of protected memory means that while a program cannot overwrite the memory of other programs, a loose pointer can still cause strange behaviour within the application.

The term presumably comes from the programmer imagining the program following the wild pointer and dancing a fandango on the core (an older term for memory) of a program.