From d1f6440a7682591c29ef2f7b85f5c1e79ac23c17 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Thu, 26 Mar 2026 10:55:11 +0100
Subject: [PATCH] Fix stack overflow on mac when cooking game with too small
 stack size

---
 Source/Editor/Cooker/GameCooker.cpp     | 3 ++-
 Source/Engine/Threading/ThreadSpawner.h | 5 +++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/Source/Editor/Cooker/GameCooker.cpp b/Source/Editor/Cooker/GameCooker.cpp
index c7acfa2d8..98cf609a7 100644
--- a/Source/Editor/Cooker/GameCooker.cpp
+++ b/Source/Editor/Cooker/GameCooker.cpp
@@ -535,7 +535,8 @@ bool GameCooker::Build(BuildPlatform platform, BuildConfiguration configuration,
     {
         Function<int32()> f;
         f.Bind(ThreadFunction);
-        const auto thread = ThreadSpawner::Start(f, GameCookerServiceInstance.Name, ThreadPriority::Highest);
+        uint32 stackSize = 4 * 1024 * 1024; // Larger stack
+        const auto thread = ThreadSpawner::Start(f, GameCookerServiceInstance.Name, ThreadPriority::Highest, stackSize);
         if (thread == nullptr)
         {
             GameCookerImpl::IsRunning = false;
diff --git a/Source/Engine/Threading/ThreadSpawner.h b/Source/Engine/Threading/ThreadSpawner.h
index f6300f1de..18c52f784 100644
--- a/Source/Engine/Threading/ThreadSpawner.h
+++ b/Source/Engine/Threading/ThreadSpawner.h
@@ -19,11 +19,12 @@ public:
     /// <param name="callback">The callback function.</param>
     /// <param name="threadName">Name of the thread.</param>
     /// <param name="priority">The thread priority.</param>
+    /// <param name="stackSize">The size of the stack to create. 0 means use the current thread's stack size</param>
     /// <returns>The created thread.</returns>
-    static Thread* Start(const Function<int32()>& callback, const String& threadName, ThreadPriority priority = ThreadPriority::Normal)
+    static Thread* Start(const Function<int32()>& callback, const String& threadName, ThreadPriority priority = ThreadPriority::Normal, uint32 stackSize = 0)
     {
         auto runnable = New<SimpleRunnable>(true);
         runnable->OnWork = callback;
-        return Thread::Create(runnable, threadName, priority);
+        return Thread::Create(runnable, threadName, priority, stackSize);
     }
 };