Re: CVS commit: src/doc

[David Holland <dholland-sourcechanges%netbsd.org@localhost>]

On Sat, Dec 31, 2016 at 08:57:16PM +0000, Kamil Rytarowski wrote:
 > Update TODO.ptrace
 > 
 > Mark exect(3) for removal, there is no use-case for it. exec() is already
 > monitored and emits SIGTRAP when traced.

Historically exect() is used by debuggers to start debuggees. While
it's equivalent to using PT_TRACE_ME followed by execve(), I think the
result is that the new process first stops immediately after the exec
finishes so that the debugger doesn't have to worry about stepping
through the exec call in its own code.

This doesn't mean it shouldn't go away (or as much away as it can,
that is, to COMPAT_70) but I'm not convinced there's no case for it.

-- 
David A. Holland
dholland%netbsd.org@localhost