While trying to debug for the first time I got this error:
ptrace: Operation not permitted.
Could not attach to the process. Make sure no other debugger traces this process.
Check the settings of
For more details, see /etc/sysctl.d/10-ptrace.conf
On Ubuntu versions after 10.10 you'll run into this in more related applications, such as QtCreator. It is a security feature of Ubuntu that prevent the debugger to attach to processes not owned by him.
This is filed as a bug #3509 against QtCreator. To work around this issue, do this:
temporary solution (won't survive a reboot):
echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
In a file
/etc/sysctl.d/10-ptrace.conf (should already exist), change the value of
0 and then reload the configuration:
sudo sysctl -p.
I'm explicitly posting the temporary solution, as you probably don't want to keep this feature disabled>
编译：Qt Ubuntu 12.10 error ptrace: Operation not permitted