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A small
number of signals which cause abnormal termination of a process also cause
a record of the process’s in-core state to be written to disk for later examination
by one of the available debuggers. (See This memory image is written to
a file named in the working directory; provided the terminated process
had write permission in the directory, and provided the abnormality did
not cause a system crash. (In this event, the decision to save the core
file is arbitrary, see The maximum size of a file is limited by Files
which would be larger than the limit are not created. The file consists
of the area, whose size (in pages) is defined by the manifest in the
file. The area starts with a structure as given in The remainder
of the file consists of the data pages followed by the stack pages of
the process image. The amount of data space image in the file is given
(in pages) by the variable in the area. The amount of stack image in the
core file is given (in pages) by the variable in the area. The size
of a ‘‘page’’ is given by the constant (also from
A
file format appeared in
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