gcore man

gcore

gcore [-a] [-o filename] pid

Generate a core dump of a running program with process ID pid. Produced file is equivalent to a kernel produced core file as if the process crashed (and if ulimit -c were used to set up an appropriate core dump limit). Unlike after a crash, after gcore the program remains running without any change.

-a

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 enable dump-excluded-mappings (see set dump-excluded-mappings).

-o filename

The optional argument filename specifies the file name where to put the core dump. If not specified, the file name defaults to core.pid , where pid is the running program process ID.