From 8925d0fa89d17db45c83e201bdffbc09ad87080f Mon Sep 17 00:00:00 2001
From: Marko Lahma <marko.lahma@gmail.com>
Date: Tue, 28 Jan 2025 20:17:43 +0200
Subject: [PATCH] Add configurable limit for Atomics.pause iterations (#2047)

---
 Jint/Native/Atomics/AtomicsInstance.cs | 1 +
 Jint/Options.cs                        | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/Jint/Native/Atomics/AtomicsInstance.cs b/Jint/Native/Atomics/AtomicsInstance.cs
index 96b3d993f..291dba411 100644
--- a/Jint/Native/Atomics/AtomicsInstance.cs
+++ b/Jint/Native/Atomics/AtomicsInstance.cs
@@ -53,6 +53,7 @@ private JsValue Pause(JsValue thisObject, JsValue[] arguments)
                 ExceptionHelper.ThrowRangeError(_realm, "Invalid iteration count");
             }
 
+            n = System.Math.Min(n, _engine.Options.Constraints.MaxAtomicsPauseIterations);
             Thread.SpinWait((int) n);
         }
         else
diff --git a/Jint/Options.cs b/Jint/Options.cs
index f765ac83d..e1fb551cd 100644
--- a/Jint/Options.cs
+++ b/Jint/Options.cs
@@ -433,6 +433,11 @@ public class ConstraintOptions
         /// The maximum size for JavaScript array, defaults to <see cref="uint.MaxValue"/>.
         /// </summary>
         public uint MaxArraySize { get; set; } = uint.MaxValue;
+
+        /// <summary>
+        /// How many iterations is Atomics.pause allowed to instruct to wait using <see cref="System.Threading.Thread.SpinWait"/>, defaults to 10 000.
+        /// </summary>
+        public int MaxAtomicsPauseIterations { get; set; } = 10_000;
     }
 
     /// <summary>