# 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

<table><thead><tr><th>Name</th><th width="249.33333333333331">Description</th></tr></thead><tbody><tr><td>Core header</td><td>Basic information about core dump, and contains offsets that locate the remaining core dump info.</td></tr><tr><td>ldinfo</td><td>Loader information</td></tr><tr><td>mstsave</td><td>Kernel thread state information. The faulting thread mstsave structure is saved in the core header</td></tr><tr><td>Default user stack</td><td>A copy of the user stack at the time of the core dump</td></tr><tr><td>Default data area</td><td>(Optional) Contains the user data section</td></tr><tr><td>Memory mapped regions</td><td>(Optional) Contains the anonymously mapped regions</td></tr><tr><td>vm_info</td><td>(Optional) Contains offset and size information for memory mapped regions</td></tr></tbody></table>