KDevelop - Attach debugger to a running process

[John Hayes]

Aleix, Sven,

Could you clarify the use of the Attach the Debugger to a running
Process? I am working on that section in the KDevelop5 manual and I can
attach to a running project with Heaptrack, but not with gdb or lldb.
When I try with either debugger I get:

	ptrace: Operation not permitted.

Am I doing something wrong, or is this due to linux kernel changes?