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In computing, a segmentation fault (often shortened to segfault) or access violation is a fault, or failure condition, raised by hardware with memory protection, notifying an operating system (OS) the software has attempted to access a restricted area of memory (a memory access violation).
Segfault (1998–2001) was a popular humor website that posted fake news reports on hacker-related topics on a near-daily basis. The range of topics was approximately the same as that covered and regularly discussed on the Slashdot — including free software , Internet phenomena, computer programming , and technology in general.
On x86 there exists an older memory management mechanism known as segmentation.If the application loads a segment register with the selector of a non-present segment (which under POSIX-compliant OSes can only be done with assembly language), the exception is generated.
Three segments in real mode memory (click on image to enlarge). There is an overlap between segment 2 and segment 3; the bytes in the turquoise area can be used from both segment selectors.
In computing, a page fault is an exception that the memory management unit (MMU) raises when a process accesses a memory page without proper preparations. Accessing the page requires a mapping to be added to the process's virtual address space.
Race condition in a logic circuit. Here, ∆t 1 and ∆t 2 represent the propagation delays of the logic elements. When the input value A changes from low to high, the circuit outputs a short spike of duration (∆t 1 + ∆t 2) − ∆t 2 = ∆t 1.
Single-event upsets were first described during above-ground nuclear testing, from 1954 to 1957, when many anomalies were observed in electronic monitoring equipment.. Further problems were observed in space electronics during the 1960s, although it was difficult to separate soft failures from other forms of interfe
Intel Quark SoC X1000 contains a bug (#71538) [17] that "under specific circumstances" results in a type of crash known as a segfault.The workaround implemented by Intel is to omit LOCK prefixes (not required on single-threaded processors) in the compiled code. [18]