Target child does not support this command error when running reverse-step

Question

I'm playing with gdb reverse debug. So I have a simple C program with main() and foo() which is called in main().

Inside gdb, I did the following

b main
record
run

And then I step into foo() with:

And then I tried to go back with

reverse-step

That's when I got the error message in the title.

My gdb version is: GNU gdb (GDB) 7.5.91.20130417-cvs-ubuntu

What have I done wrong?

Also note that GDB now gives an error if you run `record` before `run`: `Process record: the program is not being run.`. — Ciro Santilli OurBigBook.com, Jul 31 '15 at 16:02
BTW, just use Mozilla rr nowadays: https://stackoverflow.com/questions/1206872/how-to-go-to-the-previous-line-in-gdb/46996380#46996380 — Ciro Santilli OurBigBook.com, Dec 26 '18 at 11:36

score 8 · Accepted Answer · answered Jul 10 '13 at 03:26

8

You must start debugging the program (with the run command) before using record to start recording. Try

b main
run
record

answered Jul 10 '13 at 03:26

Yu Hao

1 Answers1