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Add a lock to GetNewThunksBlock #119267

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Merged
MichalStrehovsky merged 2 commits into from
Sep 3, 2025
Merged

Add a lock to GetNewThunksBlock #119267

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d38b490
Add a lock to GetNewThunksBlock
MichalStrehovsky Sep 2, 2025
516bc84
Update src/coreclr/nativeaot/System.Private.CoreLib/src/System/Runtim…
MichalStrehovsky Sep 3, 2025
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4 changes: 4 additions & 0 deletions src/coreclr/nativeaot/System.Private.CoreLib/src/System/Runtime/ThunkPool.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@

using System.Diagnostics;
using System.Numerics;
using System.Threading;

namespace System.Runtime
{
Expand Down Expand Up @@ -293,9 +294,12 @@ internal static class ThunkBlocks
{
private static IntPtr[] s_currentlyMappedThunkBlocks = new IntPtr[Constants.NumThunkBlocksPerMapping];
private static int s_currentlyMappedThunkBlocksIndex = Constants.NumThunkBlocksPerMapping;
private static Lock s_lock = new Lock(useTrivialWaits: true);

public static unsafe IntPtr GetNewThunksBlock()
{
using Lock.Scope scope = s_lock.EnterScope();

IntPtr nextThunksBlock;

// Check the most recently mapped thunks block. Each mapping consists of multiple
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