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Is it possible to save/dump core file using gdb? Sometimes I want to save file to analyze it later.
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What is a core file? A core file is an image of a process that has crashed It contains all process information pertinent to debugging: contents of hardware registers, process status, and process data. Gdb will allow you use this file to determine where your program crashed.
By default, all core dumps are stored in /var/lib/systemd/coredump (due to Storage=external ) and they are compressed with zstd (due to Compress=yes ). Additionally, various size limits for the storage can be configured. Note: The default value for kernel. core_pattern is set in /usr/lib/sysctl.
A . core file is created in the current directory when various errors occur. Errors such as memory-address violations, illegal instructions, bus errors, and user-generated quit signals, commonly cause this core dump. The core file that is created contains a memory image of the terminated process.
Issue the 'generate-core-file' command in gdb.
(gdb) help generate-core-file Save a core file with the current state of the debugged process. Argument is optional filename. Default filename is 'core.<process_id>'. (gdb) break main Breakpoint 1 at 0x400e0b: file utils/udec.c, line 36. (gdb) r Starting program: /home/nos/build/utils/udec Breakpoint 1, main (argc=1, argv=0x7fffffffe9a8) at utils/udec.c:36 36 int fileargc = 1; (gdb) generate-core-file Saved corefile core.7336 You can also use gcore <pid> to produce cores.
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