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Differential D30513

ktrace: Fix some problems with process subtree traversal
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Authored by markj on May 27 2021, 7:29 PM.
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kib
Summary


- Avoid visiting processes that were reparented, since they represent
debuggees possibly belonging to a different subtree.
- Visit orphan processes, to ensure that reparented debuggees that do
belong to the subtree are treated consistently.

Reported by: kib

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rS FreeBSD src repository - subversion
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No Test Coverage
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Buildable 39520
Build 36409: arc lint + arc unit

Event Timeline

markj created this revision.May 27 2021, 7:29 PM
Herald added a subscriber: imp. · View Herald TranscriptMay 27 2021, 7:29 PM
markj requested review of this revision.May 27 2021, 7:29 PM
Harbormaster completed remote builds in B39520: Diff 90025.May 27 2021, 7:29 PM
markj added a reviewer: kib.May 27 2021, 7:29 PM
kib added inline comments.May 27 2021, 9:52 PM
sys/kern/kern_ktrace.c
1244

I understand why this assert should be true for 'p' equal to the function argument. But after we started iterating over siblings, I think this is no longer true, generally.

1268

For orphans, I believe the iteration should be also done in depth, same as for siblings. Children of an orphan are also descendants of the process.

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sys/
kern/
63 lines

Diff 90025

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sys/kern/kern_ktrace.c

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