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The term quad buffering is the use of double buffering for each of the left and right eye images in stereoscopic implementations, thus four buffers total (if triple buffering was used then there would be six buffers). The command to swap or copy the buffer typically applies to both pairs at once, so at no time does one eye see an older image ...
Without an IOMMU, the operating system would have to implement time-consuming bounce buffers (also known as double buffers [3]). Memory is protected from malicious devices that are attempting DMA attacks and faulty devices that are attempting errant memory transfers because a device cannot read or write to memory that has not been explicitly ...
Buffer over-read – out-of-bound reads can reveal sensitive data or help attackers bypass address space layout randomization. Temporal. Use after free – dereferencing a dangling pointer storing the address of an object that has been deleted. Double free – repeated calls to free may prematurely free
In computer science, a data buffer (or just buffer) is a region of memory used to store data temporarily while it is being moved from one place to another. Typically, the data is stored in a buffer as it is retrieved from an input device (such as a microphone) or just before it is sent to an output device (such as speakers); however, a buffer may be used when data is moved between processes ...
Visualization of a software buffer overflow. Data is written into A, but is too large to fit within A, so it overflows into B.. In programming and information security, a buffer overflow or buffer overrun is an anomaly whereby a program writes data to a buffer beyond the buffer's allocated memory, overwriting adjacent memory locations.
Canaries or canary words or stack cookies are known values that are placed between a buffer and control data on the stack to monitor buffer overflows. When the buffer overflows, the first data to be corrupted will usually be the canary, and a failed verification of the canary data will therefore alert of an overflow, which can then be handled, for example, by invalidating the corrupted data.
Many operating systems implement or have an available executable space protection policy. Here is a list of such systems in alphabetical order, each with technologies ordered from newest to oldest. For some technologies, there is a summary which gives the major features each technology supports. The summary is structured as below.
The video game Firetrack would also use double buffering if shadow RAM was present. On the BBC Master (and also the BBC Model B+ [5]), shadow RAM is activated by setting the most significant bit of the memory mode number. For example, to use mode 1 with shadow RAM enabled, mode 129 (128 combined with 1) is selected.