Haiku: Process/thread management functions by trungnt2910 · Pull Request #121883 · dotnet/runtime

trungnt2910 · 2025-11-21T15:01:25Z

Add support for process/thread management functions in System.Diagnostics.Process for Haiku.

This is required to build managed runtime libraries for Haiku as well as running a simple "Hello, World!" application.

Part of #55803.

trungnt2910 · 2025-11-21T15:02:23Z

C/c @am11

I just added the relevant parts of the common files to both, then we can rebase stuff later.

Copilot

Pull request overview

This PR adds Haiku operating system support to the System.Diagnostics.Process library, enabling process and thread management functionality for Haiku. This is part of the broader effort to support Haiku as a platform (#55803).

Implements Haiku-specific process/thread management APIs using native Haiku system calls
Adds proper platform attribute annotations for API surface compatibility
Integrates Haiku interop layer for process, thread, and image information

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
`ProcessThread.cs`	Adds `[SupportedOSPlatform("haiku")]` attributes to `PriorityLevel` property getter and setter
`ProcessThread.Haiku.cs`	Implements Haiku-specific thread priority management and processor time tracking using native BeOS-style priority values
`ProcessManager.Haiku.cs`	Implements process enumeration, module collection, and process information retrieval for Haiku using team and thread APIs
`Process.cs`	Adds `[UnsupportedOSPlatform("haiku")]` attributes to working set limit properties
`Process.Haiku.cs`	Implements Haiku-specific process properties including boot time caching, start time, processor time tracking, and platform-specific helper methods
`System.Diagnostics.Process.csproj`	Adds Haiku target framework and includes Haiku-specific source files and interop definitions
`Interop.OS.cs`	Defines Haiku native interop for OS-level APIs including team/thread/area/system information structures and P/Invoke declarations
`Interop.Libraries.cs`	Defines the `libroot` library constant for Haiku native library imports
`Interop.Image.cs`	Defines Haiku native interop for image (module) information APIs

Copilot · 2025-11-21T15:11:31Z

@@ -100,6 +101,7 @@ public ThreadPriorityLevel PriorityLevel
                return _priorityLevel.Value;
            }
            [SupportedOSPlatform("windows")]


The setter is missing [SupportedOSPlatform("linux")] and [SupportedOSPlatform("freebsd")] attributes. While these platforms throw PlatformNotSupportedException in their implementations, the attributes on the public API should match the getter's attributes to maintain consistency and accuracy in the API surface declarations. The presence of the getter attribute for these platforms indicates the API should be callable, even if it throws at runtime.

Suggested change

[SupportedOSPlatform("windows")]

[SupportedOSPlatform("windows")]

[SupportedOSPlatform("linux")]

[SupportedOSPlatform("freebsd")]

Ignoring since it's not related to Haiku.

trungnt2910 · 2026-02-16T01:26:01Z

Still tracking, will take action soon.

jeffhandley · 2026-02-16T06:38:21Z

@trungnt2910 I pushed 0ee9ed3 to my fork; it merges main into your branch and resolves the conflict. Feel free to cherry-pick that commit if it's helpful.

Copilot

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 5 comments.

Copilot

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 7 comments.

Copilot · 2026-04-11T11:30:16Z

+        public static void GetProcessInfos(ref ArrayBuilder<ProcessInfo> builder, string? processNameFilter)
+        {
+            int cookie = 0;
+            Interop.OS.TeamInfo info;
+
+            while ((Interop.OS.GetNextTeamInfo(ref cookie, out info)) == 0)
+            {
+                ProcessInfo? pi = GetProcessInfoFromTeamInfo(ref info, processNameFilter);


Interop.OS.TeamInfo is declared as an unsafe struct (due to the fixed buffer). Declaring/using it here (and calling GetNextTeamInfo) requires an unsafe context; as written this method will fail to compile for the Haiku TFM. Mark the method as unsafe (or refactor the interop type to avoid requiring unsafe at call sites).

Haven't seen any build errors so far.

Copilot · 2026-04-11T11:30:16Z

+        internal static ProcessInfo? CreateProcessInfo(int pid, string? processNameFilter = null)
+        {
+            // Negative PIDs aren't valid
+            ArgumentOutOfRangeException.ThrowIfNegative(pid);
+
+            Interop.OS.TeamInfo info;
+            int status = Interop.OS.GetTeamInfo(pid, out info);
+
+            if (status != 0)


CreateProcessInfo uses Interop.OS.TeamInfo (an unsafe struct because of the fixed buffer). This method needs to be in an unsafe context (e.g., mark it unsafe) or the interop needs to be reshaped so callers don't need unsafe; otherwise the Haiku build will fail to compile.

Haven't seen any build errors so far.

Copilot · 2026-04-11T11:30:17Z

+        internal DateTime StartTimeCore
+        {
+            get
+            {
+                EnsureState(State.HaveNonExitedId);
+
+                Interop.OS.TeamInfo info;
+                int status = Interop.OS.GetTeamInfo(_processId, out info);
+


StartTimeCore uses Interop.OS.TeamInfo (an unsafe struct because of the fixed buffer). This getter must be in an unsafe context (e.g., mark the property/getter as unsafe) or the interop needs to be reshaped; otherwise the Haiku TFM will not compile.

Haven't seen any build errors so far.

Copilot

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated no new comments.

trungnt2910 · 2026-04-11T13:54:51Z

Local builds are succeeding in both Release and Debug mode (with all my other open PRs on native components applied).

Copilot

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated no new comments.

Copilot

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated no new comments.

am11 · 2026-04-26T06:45:01Z

LGTM!
cc @adamsitnik, PTAL.

Add support for process/thread management functions in `System.Diagnostics.Process` for Haiku. This is required to build managed runtime libraries for Haiku as well as running a simple "Hello, World!" application. Co-authored-by: Jessica Hamilton <jessica.l.hamilton@gmail.com>

Declare Haiku as a supported platform to MSBuild for all `System.Diagnostics.Process` builds. This prevents `CA1418` when using the `SupportedOSPlatform` attribute with `haiku`.

Otherwise `clang`-based builds will complain. `clang` treats the `enum`s as unsigned `int`, triggering a sign conversion warning.

Copilot

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated no new comments.

Copilot AI review requested due to automatic review settings November 21, 2025 15:01

github-actions Bot added the area-System.Diagnostics.Process label Nov 21, 2025

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trungnt2910 force-pushed the dev/trungnt2910/haiku-lib-diagnostics branch from 3db3a8c to 822ecd1 Compare November 21, 2025 15:28

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Comment thread src/libraries/Common/src/Interop/Haiku/Interop.Image.cs Outdated

Comment thread src/libraries/Common/src/Interop/Haiku/Interop.Image.cs Outdated

trungnt2910 force-pushed the dev/trungnt2910/haiku-lib-diagnostics branch from 822ecd1 to 7863bab Compare November 21, 2025 15:51

build-analysis Bot mentioned this pull request Nov 21, 2025

[android] Android.Device_Emulator.JIT.Test failing on emulators with CoreCLR #112633

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trungnt2910 mentioned this pull request Nov 22, 2025

Haiku: Initial managed libraries support #121880

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trungnt2910 force-pushed the dev/trungnt2910/haiku-lib-diagnostics branch 2 times, most recently from b7ee79c to f458cbd Compare November 22, 2025 02:53

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trungnt2910 force-pushed the dev/trungnt2910/haiku-lib-diagnostics branch from f458cbd to 5ed9cf0 Compare April 11, 2026 10:08

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Comment thread src/libraries/System.Diagnostics.Process/src/System/Diagnostics/ProcessManager.Haiku.cs Outdated

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Copilot AI mentioned this pull request Apr 11, 2026

Fix NullReferenceException in DestroyStructure for blittable types #126795

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trungnt2910 mentioned this pull request Apr 12, 2026

Haiku: add platform support #55803

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Comment thread src/libraries/System.Diagnostics.Process/src/System/Diagnostics/ProcessManager.Haiku.cs Outdated

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build-analysis Bot mentioned this pull request Apr 26, 2026

Android arm32 device not found (armeabi-v7a architecture unavailable) #125440

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trungnt2910 mentioned this pull request Apr 26, 2026

Haiku: Initial NativeAOT and Crossgen2 support #127431

Open

trungnt2910 and others added 3 commits April 26, 2026 22:46

Haiku: Declare as supported platform

8f9bb5b

Declare Haiku as a supported platform to MSBuild for all `System.Diagnostics.Process` builds. This prevents `CA1418` when using the `SupportedOSPlatform` attribute with `haiku`.

Haiku: Align attributes with reference API defs

d460910

trungnt2910 force-pushed the dev/trungnt2910/haiku-lib-diagnostics branch from 50691e9 to d460910 Compare April 26, 2026 12:47

Haiku: Add missing enum-to-int casts

0b80a9e

Otherwise `clang`-based builds will complain. `clang` treats the `enum`s as unsigned `int`, triggering a sign conversion warning.

Copilot AI review requested due to automatic review settings April 26, 2026 13:18

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trungnt2910 commented Apr 11, 2026 •

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