Add initial TODO list for the ptrace(2) (and procfs) interface.

Sponsored by <The NetBSD Foundation>

doc/TODO.ptrace

@@ -0,0 +1,20 @@
+$NetBSD: TODO.ptrace,v 1.1 2016/12/13 09:44:35 kamil Exp $
+
+Items we (currently) plan to finish in the ptrace(2) field:
+
+ - merge hardware watchpoint (breakpoint) support with HEAD
+ - verify ppid of core dump generated with PT_DUMPCORE
+   it must point to the real parent, not tracer
+ - adapt OpenBSD regress test (regress/sys/ptrace/ptrace.c) for the ATF context
+ - add new ptrace(2) calls to lock (suspend) and unlock LWP within a process
+ - add PT_DUMPCORE tests in the ATF framework
+ - add ATF tests for PT_WRITE_I and PIOD_WRITE_I - test mprotect restrictions
+ - add ATF tests for PIOD_READ_AUXV
+ - document more all MD specific ptrace(2) interfaces
+   (PT_GETXMMREGS, PT_SETXMMREGS, ...)
+ - add tests for the procfs interface covering all functions available on the
+   same level as ptrace(2)
+
+and of course: fix as many bugs as possible.
+
+Features in ELF, DWARF, CTF, DTrace are out of scope of the above list.