04-03-2008
Quote:
Originally Posted by
pbsrinivas
zombie and defunct are one and the same???
Not exactly, the ps command checks to see if a process is in the zombie state. If so, it will display <defunct> as the name and as the command line of the process. But the author of ps could have picked "nonesuch" or "tilt" or "not at home" just as easily. The kernel knows what a zombie is, but it never heard of "<defunct>".
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LEARN ABOUT DEBIAN
tapset::kprocess
TAPSET::KPROCESS(3stap) TAPSET::KPROCESS(3stap)
NAME
tapset::kprocess - systemtap kernel process probe points
DESCRIPTION
This family of probe points is used to probe the kernel's process activities. It contains the following probe points:
kprocess.create
Fires whenever a new process is successfully created, either as a result of one of the fork syscall variants, or a new kernel
thread.
Arguments:
task
a handle to the newly created process
new_pid
pid of the newly created process
kprocess.start
Fires immediately before a new process begins execution.
Arguments:
N/A
kprocess.exec
Fires whenever a process attempts to exec to a new program
Arguments:
filename
the path to the new executable
kprocess.exec_complete
Fires at the completion of an exec call
Arguments:
errno
the error number resulting from the exec
success
a boolean indicating whether the exec was successful
kprocess.exit
Fires when a process terminates. This will always be followed by a kprocess.release, though the latter may be delayed if the process
waits in a zombie state.
Arguments:
code
the exit code of the process
kprocess.release
Fires when a process is released from the kernel. This always follows a kprocess.exit, though it may be delayed somewhat if the
process waits in a zombie state.
Arguments:
task
a task handle to the process being released
pid
pid of the process being released
SEE ALSO
stap(1), stapprobes(3stap)
Intel, IBM TAPSET::KPROCESS(3stap)