GCORE(1) General Commands Manual GCORE(1)NAME
gcore - get core image of running process
gcore [-s][-c core] pid
gcore creates a core image of each specified process, suitable for use with adb(1). By default the core image is written to the file
The options are:
-c Write the core file to the specified file instead of <pid>.core.
-s Stop the process while creating the core image and resume it when done. This makes sure that the core dump will be in a consistent
state. The process is resumed even if it was already stopped. Of course, you can obtain the same result by manually stopping the
process with kill(1).
The core image name was changed from core.<pid> to <pid>.core to prevent matching names like core.h and core.c when using programs such as
<process-id>.core The core image.
If gcore encounters an error while creating the core image and the -s option was used the process will remain stopped.
Swapped out processes and system processes (the swapper) may not be gcore'd.
4.2 Berkeley Distribution April 15, 1994 GCORE(1)
Check Out this Related Man Page
gcore(1) BSD General Commands Manual gcore(1)NAME
gcore -- get core images of running processes
gcore [-s] [-v] [-b size] [-o path | -c pathformat] pid
The gcore program creates a core file image of the process specified by pid. The resulting core file can be used with a debugger, e.g.
lldb(1), to examine the state of the process.
The following options are available:
-s Suspend the process while the core file is captured.
-v Report progress on the dump as it proceeds.
-b size Limit the size of the core file to size MiBytes.
The following options control the name of the core file:
Write the core file to path.
Write the core file to pathformat. The pathformat string is treated as a pathname that may contain various special characters which
cause the interpolation of strings representing specific attributes of the process into the name.
Each special character is introduced by the % character. The format characters and their meanings are:
N The name of the program being dumped, as reported by ps(1).
U The uid of the process being dumped, converted to a string.
P The pid of the process being dumped, converted to a string.
T The time when the core file was taken, converted to ISO 8601 format.
% Output a percent character.
The default file name used by gcore is %N-%P-%T. By default, the core file will be written to a directory whose name is determined from the
kern.corefile MIB. This can be printed or modified using sysctl(8).
The directory where the core file is to be written must be accessible to the owner of the target process.
gcore will not overwrite an existing file, nor will it create missing directories in the path.
The gcore utility exits 0 on success, and >0 if an error occurs.
/cores/%N-%P-%T default pathname for the corefile.
With the -b flag, gcore writes out as much data as it can up to the specified limit, even if that results in an incomplete core image. Such
a partial core dump may confuse subsequent programs that attempt to parse the contents of such files.
SEE ALSO lldb(1), core(5), Mach-O(5), sysctl(8), sudo(8).
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