Fix target_set tapset.

Revise acquiring of pid and ppid in fork.return probe -- use returnval()
and pid() instead of pid() and ppid() respectively. Add pid removal on
exit syscall. Use dwarfless syscall probe aliases. Correct formatting.

Signed-off-by: Josh Stone <jistone@redhat.com>

1 files changed, 18 insertions, 10 deletions

diff --git a/tapset/target_set.stp b/tapset/target_set.stp
index c7878c52..9a4beced 100644
--- a/tapset/target_set.stp
+++ b/tapset/target_set.stp
@@ -3,25 +3,33 @@ global _target_set # map: target-set-pid -> ancestor-pid
 
 function target_set_pid (pid)
 {
-  return ([pid] in _target_set)	 
+	return ([pid] in _target_set)
 }
 
 probe begin
 {
-  if (target()) _target_set [target()] = stp_pid()
+	if (target())
+		_target_set[target()] = stp_pid()
 }
 
-probe syscall.fork.return
+probe nd_syscall.fork.return
 {
-  pid=pid()
-  if (pid in _target_set) next
-  ppid=ppid()
-  if (ppid in _target_set) _target_set[pid]=ppid
+	pid = returnval()
+	if (pid in _target_set)
+		next
+	ppid = pid()
+	if (ppid in _target_set)
+		_target_set[pid] = ppid
+}
+
+probe nd_syscall.exit
+{
+	delete _target_set[pid()]
 }
 
 function target_set_report ()
 {
-  printf("target set:\n")
-  foreach (pid in _target_set+)
-    printf("%d begat %d\n", _target_set[pid], pid)
+	printf("target set:\n")
+	foreach (pid in _target_set+)
+		printf("%d begat %d\n", _target_set[pid], pid)
 }