core file

Contains the memory snapshot of a process at error time

The following errors cause core dump

  • Memory address violations,

  • illegal instructions,

  • bus errors,

  • user generated quit signals

Core dump contents


Core header

Basic information about core dump, and contains offsets that locate the remaining core dump info.


Loader information


Kernel thread state information. The faulting thread mstsave structure is saved in the core header

Default user stack

A copy of the user stack at the time of the core dump

Default data area

(Optional) Contains the user data section

Memory mapped regions

(Optional) Contains the anonymously mapped regions


(Optional) Contains offset and size information for memory mapped regions

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