Page 26 - slides.dvi

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Operating
e.g.
e.g.
Parent
task
Process
child
Process
Process
Systems
makes
parent
(many
Unix
output
—
process’
is
has
attempts
may
an
has
terminates)
to
data
Process
assigned
NT/2K/XP
executes
performs
exiting
to
operating
from
an
has
resources
Life-cycle
attempt
last
exceeded
terminate
wait(),
execute
TerminateProcess()
to
Termination
are
child
a
child
for
is
illegal
systems
to
no
access
exit()
allocated
do
(“cascading
statement
execution
killing
privileged
of
not
and
parent
deallocated
and
longer
ExitProcess()
operation,
memory
by
child
others.
resources
allow
for
asks
to
e.g.
(wait)
a
the
kill()
self
the
required
termination”)
instruction
OS.
child
which
processes
it
to
is
operating
termination
not
(abort,
continue
and
if
system
kill),
its
to
e.g.
authorised,
delete
parent
it
because
(exit):
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