使用源文件运行gdb

Question

I have a Linux executable file and I can run it on command line, but at first, I should use

source ./somefile

If I don't source it, the executable crashed. I also, can run the file under dbg. But I need to source somefile in gdb also. I mean, I already make source ./somefile then run the gdb and run the executable in it, the executable crashed like without using source ./somefile.

By the way, somefile that I should source contains some EXPORT=bla bla definitions.

Executable is an embedded qt software, running on imx6 board. Sourcing somefile makes some definition about qt libraries. The crash message when I run the executable without sourcing somefile and when sourcing it and then run in gdb is exactly the same. So I think that after source somefile, if I run the executable in gdb, it seems gdb doesn't know libraries' path. May be a way to source a file for gdb.

Answer 1

I guess you are asking how to set environment variables inside gdb.

You should use set environment , see builtin help:

(gdb) help set environment 
Set environment variable value to give the program.
Arguments are VAR VALUE where VAR is variable name and VALUE is value.
VALUES of environment variables are uninterpreted strings.
This does not affect the program until the next "run" command.
(gdb) 

You will have to take VAR and VALUE from ./somefile . You can't simply source it in gdb prompt because it is shell script, not gdb script.

Answer 2

You might run your source command, and later, in the same shell (eg same terminal window), run gdb to debug your program. The environment variables setup by your source builtin command are valid for not only the gdb process, but also the debugged process.

Read more about Debugging with GDB .