How do I restart a GDB program?
if you change and recompile your program in another window, you don’t need to restart gdb. Just type “run” again, and gdb will notice the changes and load the new copy of your program. pressing enter executes the last command again. This makes it easily to step through your program line by line.
Can you go back in GDB?
If the target environment supports it, GDB can allow you to “rewind” the program by running it backward. A target environment that supports reverse execution should be able to “undo” the changes in machine state that have taken place as the program was executing normally.
How do I stop GDB?
Quitting GDB To exit GDB, use the quit command (abbreviated q ), or type an end-of-file character (usually C-d ). If you do not supply expression , GDB will terminate normally; otherwise it will terminate using the result of expression as the error code.
How do I run GDB on target?
Download your program to your target machine (or get it there by whatever means the manufacturer provides), and start it. To start remote debugging, run GDB on the host machine, and specify as an executable file the program that is running in the remote machine.
How do I delete a breakpoint in GDB?
With the clear command you can delete breakpoints according to where they are in your program. With the delete command you can delete individual breakpoints, watchpoints, or catchpoints by specifying their breakpoint numbers. It is not necessary to delete a breakpoint to proceed past it.
What is the difference between Step and Next in gdb?
The difference between “next” and “step” is that “step” stops inside a called function, while “next” executes called functions at (nearly) full speed, stopping only at the next line in the current function.
What does Ctrl C do in GDB?
Normally when you run a program through GDB you can press Ctrl+C to interrupt it, e.g. if it gets stuck in an infinite loop and you want to get a backtrace.
How do you continue the program after stopping at a breakpoint GDB?
You can use breakpoint commands to start your program up again. Simply use the continue command, or step , or any other command that resumes execution. Any other commands in the command list, after a command that resumes execution, are ignored.
How do I use BT in GDB?
To print a backtrace of the entire stack, use the backtrace command, or its alias bt . This command will print one line per frame for frames in the stack. By default, all stack frames are printed. You can stop the backtrace at any time by typing the system interrupt character, normally Ctrl-c .
What is a watchpoint in GDB?
If GDB creates a software watchpoint, it can only watch the value of an expression in a single thread. If you are confident that the expression can only change due to the current thread’s activity (and if you are also confident that no other thread can become current), then you can use software watchpoints as usual.