Code::Blocks Forums

User forums => Using Code::Blocks => Topic started by: hqt on September 09, 2011, 10:08:35 am

Title: Debug: go back to line before
Post by: hqt on September 09, 2011, 10:08:35 am

I'm using Code::Block nightly built version, and I have a small problem when I debug a program.
for example, I debug at line 10: a function call, and I hit F7, it will goto line 11 (of course, I don't want :( because I want to go through this function to view how it work by Shift+F7) So, I must start again from beginning function, and go through some loop to go here again :(-->and It's too slow.
So, I don't know how can back again 1 line. It mean,it will come back to line 10 again(and of course, no variable change :) )

so who know this problem, please help me please.

Title: Re: Debug: go back to line before
Post by: ollydbg on September 09, 2011, 10:17:18 am

Show us the sample code. Also, Could you use more formal items like "step into" "step" instead of the short-cut key name.
I have different short-cut key mapping, so I event don't know what "F7" means.

Title: Re: Debug: go back to line before
Post by: hqt on September 09, 2011, 10:44:17 am

Oh, I'm sorry so much, because I often use default shortcut, so I rarely think there some people different from me.
So, this is my problem:

Code

int main(){
            For(i=1;i<=n;i++){
                 ...... some line of code;
                 Function();
               printf();
                ....... some line of code;
            }
}

I debug at line Function(), and I want to go through this function-> press "step into". But I have pressed "next line" (But I don't want to), so I will go to line "printf" ---> so I cannot see what  "function" do (and most of case, It have wrong answer, so I need to view it carefully).
So, the unique solution that I know is: I will restart debug, and debug again from int main(). It seem easy, but if my program run right from (i=1-->10), and wrong when i=11, so I must go through tenth times :-O

that's my problem, hope that clearer for you.
so, thanks for all :)

Title: Re: Debug: go back to line before
Post by: ollydbg on September 09, 2011, 11:09:56 am

Code

Menu->debug->Set Next Statement.

This will help you. Mostly you don't need this command, you can set a bp in the Function body to see whether something is wrong.

BTW: This command may not work correctly or will crash your app, because you directly set the PC pointer. Take care!!!

Title: Re: Debug: go back to line before
Post by: oBFusCATed on September 09, 2011, 09:59:21 pm

Quote from: hqt on September 09, 2011, 10:08:35 am

So, I don't know how can back again 1 line. It mean,it will come back to line 10 again(and of course, no variable change :) )

"no variable change" <- this is almost impossible.

Probably you can try command line gdb + reversed debugging (I think it works only on linux and it is quite slow)

For other sane usages "set next statements" is quite good, but you need debugger's branch nightly.