https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293871
Bug ID: 293871
Summary: procctl: add PROC_REAP_STATUS_EX for extended reaper
subtree introspection
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 268877
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268877&action=edit
procctl: add extended reaper status query
This patch adds a new procctl(2) operation, PROC_REAP_STATUS_EX, to provide
extended introspection of existing reaper-managed process trees.
The current PROC_REAP_STATUS interface remains unchanged for compatibility.
The new PROC_REAP_STATUS_EX query returns additional information about the
target process, including:
- owning reaper PID
- subtree identifier
- real parent PID
- whether the process is a direct child of its reaper
- whether the process is itself a reaper
- for reaper processes, the number of direct children and tracked descendants
The patch also updates procctl(2) to document the new operation and its
associated structure and flags.
Motivation:
The existing reaper infrastructure already tracks subtree relationships, but
userland has only limited visibility into them. This change provides a small,
opt-in extension for userland tools that need more detailed process-tree
introspection.
Testing:
- Built and booted a kernel containing the change on FreeBSD-CURRENT.
- Verified that ordinary processes report the expected init-rooted reaper
state.
- Verified that a process after PROC_REAP_ACQUIRE reports itself as a reaper.
- Verified that direct children and grandchildren report the expected reaper
and
subtree values.
- Included a small userland C test program as an attachment for reviewer use.
This is intended as a focused introspection improvement; it does not modify the
behavior of existing reaper operations.
--
You are receiving this mail because:
You are the assignee for the bug.
