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win32-jobobject-tree-kill

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更新日2026年5月8日 22:04

Kill a spawned Windows process tree from C# with a Win32 Job Object.

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rogerbarreto

rogerbarreto/copilot-booster

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Win32 JobObject tree kill

Use when

A service spawns a process that may spawn descendants.
User cancel or timeout must kill the full tree.
No external NuGet dependency is allowed.

C# pattern

Wrap P/Invoke in an internal static helper.
Create a job with CreateJobObject.
Set JOBOBJECT_EXTENDED_LIMIT_INFORMATION.BasicLimitInformation.LimitFlags = JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE.
Start the child process.
Assign process.Handle using AssignProcessToJobObject immediately after start.
On cancel or timeout, call TerminateJobObject(job, 1).
Close the job handle in finally.

P/Invoke surface

CreateJobObject
SetInformationJobObject
AssignProcessToJobObject
TerminateJobObject
CloseHandle
JOBOBJECT_EXTENDED_LIMIT_INFORMATION
JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE

Copilot Booster location

Helper: src/Services/Win32JobObject.cs
Production use: src/Services/ProcessRunner.cs
Contract: IProcessRunner.RunAsync(...) -> ProcessResult.WasKilled

Classification rule

WasKilled == true && ct.IsCancellationRequested means user cancel. Log outcome=cancelled, leave failure class null.
WasKilled == true && !ct.IsCancellationRequested means timeout.

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name	win32-jobobject-tree-kill
description	Kill a spawned Windows process tree from C# with a Win32 Job Object.

Win32 JobObject tree kill

Use when

A service spawns a process that may spawn descendants.
User cancel or timeout must kill the full tree.
No external NuGet dependency is allowed.

C# pattern

Wrap P/Invoke in an internal static helper.
Create a job with CreateJobObject.
Set JOBOBJECT_EXTENDED_LIMIT_INFORMATION.BasicLimitInformation.LimitFlags = JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE.
Start the child process.
Assign process.Handle using AssignProcessToJobObject immediately after start.
On cancel or timeout, call TerminateJobObject(job, 1).
Close the job handle in finally.

P/Invoke surface

CreateJobObject
SetInformationJobObject
AssignProcessToJobObject
TerminateJobObject
CloseHandle
JOBOBJECT_EXTENDED_LIMIT_INFORMATION
JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE

Copilot Booster location

Helper: src/Services/Win32JobObject.cs
Production use: src/Services/ProcessRunner.cs
Contract: IProcessRunner.RunAsync(...) -> ProcessResult.WasKilled

Classification rule

WasKilled == true && ct.IsCancellationRequested means user cancel. Log outcome=cancelled, leave failure class null.
WasKilled == true && !ct.IsCancellationRequested means timeout.