[SOLVED] How to gather information/debug when we have only the core file

Issue

I have came across a situation where we have only the core file (no executable). How can i use the core file with gdb or any other tool to gather as much information as possible.

gdb core
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"/home/core": not in executable format: File format not recognized

Solution

I have came across a situation where we have only the core file (no executable).

Surely you have the executable somewhere? Get a copy of it if you can.

How can i use the core file with gdb or any other tool to gather as much information as possible.

Unless you configured the host to dump file-backed shared mappings (see coredump_filterdocumentation), you simply can't extract much meaningful info from the core.

gdb core

Don't do that. Do this instead: gdb -c core. Then where, and info registers and possibly print $_siginfo may provide something, but it will not be much.

Answered By - Employed Russian

Answer Checked By - Gilberto Lyons (WPSolving Admin)