Core dump

What is core dump?
A core dump is a file of documented memory on a computer when a program or computer has crashed. The file consists of the recorded status of the working memory at an explicit time, usually shortly before the system crashed or when the program was terminated atypically.

In addition to all of the system memory or just part of the program that was canceled, a core dump file can contain additional information such as:

- The status of the processor
- The contents of the processor register
- Storage management information
- The counter and the stack pointer of the program
- Operating system and processor information and flags

Core dump can also be referred to as a memory dump, memory dump, or memory dump.

Programmers often use a core dump to investigate the problem using a debugger. A core dump can contain all or part of the failed program. There are several reasons a computer or program can crash:

Corrupted data
A serious user mistake
Virus infected files
Problems accessing data files
An outdated operating system
A segmentation error or bus error
A poorly ventilated or dusty computer tower
A software or hardware error detected by the system
Computer overheating due to defective heat sink or fan

In general, a core dump file contains the contents of the random access memory (RAM) of a particular process or part of an address space of the process and values of processor registers. The core dump files can be used to analyze the cause of the dump, to be displayed as text or to be printed.

Since a modern OS process address space can share fractions and pages with other files and processes, a more complicated picture is used. In Unix-like systems, core dumps typically use the standard executable image format:

Mach-O on Mac OS X
a.out in older versions of Unix
Executable and linkable format (ELF) in modern Linux, Solaris, Unix System V and Berkeley software distribution (BSD) schemes

Originally, a core dump accurately transferred the contents of the memory to capture the state of the computer. The core dumps were actual printouts of about a hundred pages or more made up of octal or hexadecimal numbers. The pages were examined by programmers to investigate the cause of the crash or the abnormally aborted program. Finally, the introduction of debuggers eliminated the need for large batches of printouts.

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