gdb script, assign functions' return value in user variable

Question

I would like to assign the "info sharedlibrary" value to a variable in user define function.

Such as,

define customFunction

    set $i = info sharedlibrary

end

But it seems impossible in gdb And also i cannot use python script too...

Is there any way to do this??

Thank you

ps. I trying to do this because i want to print only selected library's instructions.

Tom Tromey · Accepted Answer · 2016-07-23 04:52:38Z

1

You don't mention why you can't use a Python function. That's by far the simplest way to program gdb.

However, if you really must do it, and really must avoid Python, there is a way. It's gross! But it does work. It's like this:

Use the various set logging commands to redirect output to a temporary file.
Invoke the command you want.
Use set logging again to disable logging.
Use the shell command to run sed or perl or what-have-you on this temporary file to turn it into a sequence of gdb commands, say commands to set a variable, or commands to print exactly the output you want.
source the resulting file

answered Jul 23, 2016 at 4:52

Tom Tromey

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1 Comment

Wow, Thanks a lot. It's really helpful to me. And the reason that I cannot use Python is because i trying to use gdb in my Android devices.