GCORE(1) BSD General Commands Manual GCORE(1)NAMEgcore — get core images of running process
SYNOPSISgcore [-f] [-s] [-c core] [executable] pid
The gcore utility creates a core image of the specified process, suitable
for use with gdb(1). By default, the core is written to the file
“core.<pid>”. The process identifier, pid, must be given on the command
The following options are available:
-c Write the core file to the specified file instead of
-f Dumps all available segments, excluding only malformed and
undumpable segments. Unlike the default invocation, this flag
dumps mappings of devices which may invalidate the state of
device transactions or trigger other unexpected behavior. As a
result, this flag should only be used when the behavior of the
application and any devices it has mapped is fully understood and
any side effects can be controlled or tolerated.
-s Stop the process while gathering the core image, and resume it
when done. This guarantees that the resulting core dump will be
in a consistent state. The process is resumed even if it was
already stopped. The same effect can be achieved manually with
core.<pid> the core image
A gcore utility appeared in 4.2BSD.
Because of the ptrace(2) usage gcore may not work with processes which
are actively being investigated with truss(1) or gdb(1). Additionally,
interruptable sleeps may exit with EINTR.
The gcore utility is not compatible with the original 4.2BSD version.
BSD July 14, 2010 BSD