This is how you can install some essential tools on a jailbroken iOS device. Remember that you do this at your own risk.
If you still haven’t jailbroken your iOS device, this might help.
- Gnu debugger GDB
The above tools can be obtained through ‘Cydia’ software package distribution. Select ‘Sources’ and ‘Cydia/Telesphoreo’. Go through the list of packages and install whatever you need.