gcore [-a] [-o prefix] pid1 [pid2...pidN]
Generate core dumps of one or more running programs with process IDs
pid1, pid2, etc. A core file produced by
is equivalent to one produced by the kernel when the process crashes
(and when ulimit -c was used to set up an appropriate core dump
limit). However, unlike after a crash, after
its job the program remains running without any change.
Dump all memory mappings. The actual effect of this option depends on
the Operating System. On GNU/Linux, it will disable
use-coredump-filter (see set use-coredump-filter) and
dump-excluded-mappings (see set dump-excluded-mappings).
The optional argument prefix specifies the prefix to be used
when composing the file names of the core dumps. The file name is
composed as prefix.pid, where pid is the
process ID of the running program being analyzed by
If not specified, prefix defaults to gcore.