Say I have a C program that, when run, calls scanf and then branches depending on whether the input meets some criteria. I can run the program in regular gdb and type it in manually, but I have to test a lot of strings and I'd rather do it with a script.
So I basically want to define a command that will:
- Load the executable and run it
- Input some text in the console for me
- If a breakpoint is hit, restart from the beginning. Otherwise, let the program continue.
This is what I have now.
# MyCommand.py
import gdb
class MyCommand(gdb.Command):
def __init__(self):
super(MyCommand, self).__init__("my-command", gdb.COMMAND_DATA)
def invoke(self, arg, from_tty):
gdb.execute("file prog")
gdb.execute("b wrong_input")
gdb.execute("run")
gdb.write("abcd") #stops working here
MyCommand()
I run it in gdb with:
(gdb) source MyCommand.py
(gdb) my-command
I don't know how to print something to the program's stream instead of gdb. When I run that command, it waits for me to type something and only prints abcd when it hits a breakpoint and the gdb shell comes back. Can I do this with python? And if not, is there any way to do it?
runcommand.