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[PATCH 1/2] Fix target_set tapset.
- From: Przemyslaw Pawelczyk <przemyslaw at pawelczyk dot it>
- To: systemtap at sourceware dot org
- Date: Fri, 19 Jun 2009 00:27:45 +0200
- Subject: [PATCH 1/2] Fix target_set tapset.
- Mail-from: 8ae2084d4e4cbae89d74a9bbf5abc88b904ed490 Mon Sep 17 00:00:00 2001
- References: <1244936781.212635.16785@debian>
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.
---
tapset/target_set.stp | 28 ++++++++++++++++++----------
1 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/tapset/target_set.stp b/tapset/target_set.stp
index c7878c5..9a4bece 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)
}
--
1.5.6.5