DWARF line number information, if generated, is stored in the
.debug_line section of an object file.
The information is encoded as instructions for a VM that is defined in
the DWARF specification.
By executing these instructions, we can extract the encoded line number
information.
When the user of the DebugSession uses this decision, the debugged
program will be continued until it is either stopped by a singal (e.g
as a reuslt of a breakpoint), or enters a syscall.
functrace traces the function calls a program makes.
It's like strace, but for userspace.
It works by using Debugging functionality to insert breakpoints
at call&ret instructions.
