Moxa IA3341-LX [55/72] On line debugging with gdb

IA3341 Linux User’s Manual Development Tool Chains

5-3

size Lists object file section sizes

strings Prints strings of printable characters from files (usually object files)

strip Removes symbols and sections from object files (usually debugging information)

On-Line Debugging with GDB

The tool chain also provides an on-line debugging mechanism to help you develop your program.

Before performing a debugging session, add the option -ggdb to compile the program. A

debugging session runs on a client-server architecture on which the server

gdbserver is installed

int the targe computer and the client ddd is installed in the host computer. We’ll asuumne that you

have uploaded a program named hello-debug to the target computer and strat to debug the

program.

1. Log on to the target computer and run the debugging server program.

#gdbserver 192.168.4.142:2000 hello-debug

Process hello-debug created; pid=38

The debugging server listens for connections at network port 2000 from the network interface

192.168.4.142. The name of the program to be debugged follows these parameters. For a

program requiring arguments, add the arguments behind the program name.

2. In the host computer, change the directory to where the program source resides.

cd /my_work_directory/myfilesystem/testprograms

3. Execute the client program.

#ddd --debugger arm-linux-gdb hello-debug &

4. Enter the following command at the GDB, DDD command prompt.

Target remote 192.168.4.99:2000

The command produces a line of output on the target console, similar to the following.

Remote debugging using 192.168.4.99:2000

192.168.4.99 is the machine’s IP address, and 2000 is the port number. You can now begin

debugging in the host environment using the interface provided by DDD.

5. Set a break point on main by double clicking, or by entering

b main on the command line.

6. Click the cont button.