The Unix implementation of Process type is not thread safe
Nobody has claimed this yet.
Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 45/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- csharp
- Domain
- operating-systems
Research direction
Start in src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.Unix.cs at GetWaitState(), especially lines 955-962, then trace how Process.Kill uses the returned ProcessWaitState. Reproduce or reason about concurrent calls and verify that concurrent Process operations no longer observe separate mutable state or fail to terminate the process.
Written by the indexing model from the issue text.
Description
Description
Method GetWaitState() may be entered my multiple threads (it's not guarded by a lock) and each thread can return different instance of the ProcessWaitState, which is mutable.
When using Process.Kill in dotnet-watch we observed that the method sometimes failed to terminate process on Linux. It is plausible that this is due to the above race condition.
Reproduction Steps
n/a
Expected behavior
All methods of Process type should be thread safe.
Actual behavior
Race conditions
Regression?
No response
Known Workarounds
No response
Configuration
No response
Other information
No response
- Dominant language
- C#
- Stars
- 18.3k
- Forks
- 5.6k
- PR merge metrics
- PR metrics pending
Contributor guide
First steps
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