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| author | kib <kib@FreeBSD.org> | 2014-08-07 05:47:53 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2014-08-07 05:47:53 +0000 |
| commit | 0b059d23c7081e1cea5512459c573223dc017be9 (patch) | |
| tree | 033a19954132b23984c24a614f928220b364cc2b /bin | |
| parent | ffe6b11ba6dedd5eff6feb31b9e53c526bf6c5dd (diff) | |
| download | FreeBSD-src-0b059d23c7081e1cea5512459c573223dc017be9.zip FreeBSD-src-0b059d23c7081e1cea5512459c573223dc017be9.tar.gz | |
Correct the problems with the ptrace(2) making the debuggee an orphan.
One problem is inferior(9) looping due to the process tree becoming a
graph instead of tree if the parent is traced by child. Another issue
is due to the use of p_oppid to restore the original parent/child
relationship, because real parent could already exited and its pid
reused (noted by mjg).
Add the function proc_realparent(9), which calculates the parent for
given process. It uses the flag P_TREE_FIRST_ORPHAN to detect the head
element of the p_orphan list and than stepping back to its container
to find the parent process. If the parent has already exited, the
init(8) is returned.
Move the P_ORPHAN and the new helper flag from the p_flag* to new
p_treeflag field of struct proc, which is protected by proctree lock
instead of proc lock, since the orphans relationship is managed under
the proctree_lock already.
The remaining uses of p_oppid in ptrace(PT_DETACH) and process
reapping are replaced by proc_realparent(9).
Phabric: D417
Reviewed by: jhb
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Diffstat (limited to 'bin')
| -rw-r--r-- | bin/ps/ps.1 | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/bin/ps/ps.1 b/bin/ps/ps.1 index 3d7edf7..d8e56fb 100644 --- a/bin/ps/ps.1 +++ b/bin/ps/ps.1 @@ -29,7 +29,7 @@ .\" @(#)ps.1 8.3 (Berkeley) 4/18/94 .\" $FreeBSD$ .\" -.Dd June 6, 2014 +.Dd August 7, 2014 .Dt PS 1 .Os .Sh NAME @@ -332,7 +332,6 @@ the include file .It Dv "P_SINGLE_BOUNDARY" Ta No "0x400000" Ta "Threads should suspend at user boundary" .It Dv "P_HWPMC" Ta No "0x800000" Ta "Process is using HWPMCs" .It Dv "P_JAILED" Ta No "0x1000000" Ta "Process is in jail" -.It Dv "P_ORPHAN" Ta No "0x2000000" Ta "Orphaned by original parent, reparented to debugger" .It Dv "P_INEXEC" Ta No "0x4000000" Ta "Process is in execve()" .It Dv "P_STATCHILD" Ta No "0x8000000" Ta "Child process stopped or exited" .It Dv "P_INMEM" Ta No "0x10000000" Ta "Loaded into memory" |
