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Name native threads before start (macOS/Native AOT) #114249

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Merged
merged 8 commits into from
Apr 10, 2025
Merged

Name native threads before start (macOS/Native AOT) #114249

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7608914
Name native threads before start on macOS
eduardo-vp Apr 4, 2025
abefa1b
Make sure ThreadStart is always initialized with the thread on OS x
eduardo-vp Apr 4, 2025
d0178e1
Use Thread.CurrentThread
eduardo-vp Apr 4, 2025
eaef706
Check if CI passes commenting the line that changes the thread name
eduardo-vp Apr 4, 2025
18c9010
Add test
eduardo-vp Apr 9, 2025
37ea2b2
Make the test specific to Windows
eduardo-vp Apr 9, 2025
caa8e83
Remove test
eduardo-vp Apr 9, 2025
cf44e16
Remove link to the github issue
eduardo-vp Apr 10, 2025
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12 changes: 12 additions & 0 deletions src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,18 @@ private void RunWorker()

try
{
#if TARGET_OSX || NATIVEAOT
// On other platforms, when the underlying native thread is created,
// the thread name is set to the name of the managed thread by another thread.
// However, on OS X and NativeAOT (across all OSes), only the thread itself can set its name.
// Therefore, by this point the native thread is still unnamed as it has not started yet.
Thread thread = Thread.CurrentThread;
if (!string.IsNullOrEmpty(thread.Name))
{
// Name the underlying native thread to match the managed thread name.
thread.ThreadNameChanged(thread.Name);
}
#endif
if (start is ThreadStart threadStart)
{
threadStart();
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