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gcore - Man Page

Generate a core file of a running program


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 gcore 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 gcore finishes 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 and enable dump-excluded-mappings.

-o prefix

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 gcore. If not specified, prefix defaults to gcore.

See Also

The full documentation for GDB is maintained as a Texinfo manual. If the info and gdb programs and GDB's Texinfo documentation are properly installed at your site, the command

        info gdb

should give you access to the complete manual.

Using GDB: A Guide to the GNU Source-Level Debugger, Richard M. Stallman and Roland H. Pesch, July 1991.


2024-06-27 gdb-14.2-13.fc41 GNU Development Tools