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- Dangling_pointer abstract "Dangling pointers and wild pointers in computer programming are pointers that do not point to a valid object of the appropriate type. These are special cases of memory safety violations. More generally, dangling references and wild references are references that do not resolve to a valid destination, and include such phenomena as link rot on the internet.Dangling pointers arise during object destruction, when an object that has an incoming reference is deleted or deallocated, without modifying the value of the pointer, so that the pointer still points to the memory location of the deallocated memory. As the system may reallocate the previously freed memory to another process, if the original program then dereferences the (now) dangling pointer, unpredictable behavior may result, as the memory may now contain completely different data. This is especially the case if the program writes data to memory pointed by a dangling pointer, a silent corruption of unrelated data may result, leading to subtle bugs that can be extremely difficult to find, or cause segmentation faults (UNIX, Linux) or general protection faults (Windows). If the overwritten data is bookkeeping data used by the system's memory allocator, the corruption can cause system instabilities. In object-oriented languages with garbage collection, dangling references are prevented by only destroying objects that are unreachable, meaning do not have any incoming pointers; this is ensured either by tracing or reference counting. However, a finalizer may create new references to an object, requiring object resurrection to prevent a dangling reference.Wild pointers arise when a pointer is used prior to initialization to some known state, which is possible in some programming languages. They show the same erratic behaviour as dangling pointers, though they are less likely to stay undetected.".
- Dangling_pointer wikiPageExternalLink softbound.
- Dangling_pointer wikiPageExternalLink MemorySafety.
- Dangling_pointer wikiPageID "1119856".
- Dangling_pointer wikiPageRevisionID "606269263".
- Dangling_pointer hasPhotoCollection Dangling_pointer.
- Dangling_pointer subject Category:Computer_security_exploits.
- Dangling_pointer subject Category:Software_bugs.
- Dangling_pointer type Abstraction100002137.
- Dangling_pointer type Accomplishment100035189.
- Dangling_pointer type Act100030358.
- Dangling_pointer type Action100037396.
- Dangling_pointer type ComputerSecurityExploits.
- Dangling_pointer type Event100029378.
- Dangling_pointer type Feat100036762.
- Dangling_pointer type PsychologicalFeature100023100.
- Dangling_pointer type YagoPermanentlyLocatedEntity.
- Dangling_pointer comment "Dangling pointers and wild pointers in computer programming are pointers that do not point to a valid object of the appropriate type. These are special cases of memory safety violations.".
- Dangling_pointer label "Apontador pendente".
- Dangling_pointer label "Dangling pointer".
- Dangling_pointer label "Dangling pointer".
- Dangling_pointer label "Hängender Zeiger".
- Dangling_pointer label "Referencia colgante".
- Dangling_pointer label "迷途指针".
- Dangling_pointer sameAs Hängender_Zeiger.
- Dangling_pointer sameAs Referencia_colgante.
- Dangling_pointer sameAs Dangling_pointer.
- Dangling_pointer sameAs Apontador_pendente.
- Dangling_pointer sameAs m.047r1t.
- Dangling_pointer sameAs Q1642293.
- Dangling_pointer sameAs Q1642293.
- Dangling_pointer sameAs Dangling_pointer.
- Dangling_pointer wasDerivedFrom Dangling_pointer?oldid=606269263.
- Dangling_pointer isPrimaryTopicOf Dangling_pointer.