10.18 How to Produce a Core File from Your Program
A core file or core dump is a file that records the memory image of a running process and its process status (register values etc.). Its primary use is post-mortem debugging of a program that crashed while it ran outside a debugger. A program that crashes automatically produces a core file, unless this feature is disabled by the user. See Files, for information on invoking gdb in the post-mortem debugging mode.
- Produce a core dump of the inferior process. The optional argument
file specifies the file name where to put the core dump. If not
specified, the file name defaults to core.pid, where
pid is the inferior process ID.
Note that this command is implemented only for some systems (as of this writing, gnu/Linux, FreeBSD, Solaris, Unixware, and S390).