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Is there a way to execute function in process core context in GDB?

The incentive is to run a function that will go through a large tree to find a specific node. I can walk the tree manually but I would like to build a function that will help me analyze the core.

Hence either a function or "GDB script" to run over the data tree.

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Is there a way to execute function in process core context in GDB?

No: you need a "live" inferior process for that.

I can walk the tree manually but I would like to build a function that will help me analyze the core.

You can do that using Python scripting built into recent GDB versions.

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gdb can call C functions. If you type p myfunction(...parameters...), gdb will evaluate the expression and print the returned value. Of course, the program you're debugging must be stopped.

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I understand that on a running program this will work (and thanks for the input). My problem is that the program has already crashed and I need to call a function from the core context no a running program.
Uhm... no, too late :( . The only hope is a gdb script, sorry
Of course, if you can catch the exception in gdb, the process is still alive and you can call your function.
No exception in my world C :)
Oh, sorry! I'd say "segmentation fault" :D

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