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| <h3 class="section">10.18 How to Produce a Core File from Your Program</h3> |
| |
| <p><a name="index-dump-core-from-inferior-637"></a> |
| A <dfn>core file</dfn> or <dfn>core dump</dfn> 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 <a href="Files.html#Files">Files</a>, for information on invoking <span class="sc">gdb</span> in |
| the post-mortem debugging mode. |
| |
| <p>Occasionally, you may wish to produce a core file of the program you |
| are debugging in order to preserve a snapshot of its state. |
| <span class="sc">gdb</span> has a special command for that. |
| |
| |
| <a name="index-gcore-638"></a> |
| <a name="index-generate_002dcore_002dfile-639"></a> |
| <dl><dt><code>generate-core-file [</code><var>file</var><code>]</code><dt><code>gcore [</code><var>file</var><code>]</code><dd>Produce a core dump of the inferior process. The optional argument |
| <var>file</var> specifies the file name where to put the core dump. If not |
| specified, the file name defaults to <samp><span class="file">core.</span><var>pid</var></samp>, where |
| <var>pid</var> is the inferior process ID. |
| |
| <p>Note that this command is implemented only for some systems (as of |
| this writing, <span class="sc">gnu</span>/Linux, FreeBSD, Solaris, Unixware, and S390). |
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