From 47a01617ea9bb51ecf40d155155299a0278f09f4 Mon Sep 17 00:00:00 2001
From: trav90 <travawine@palemoon.org>
Date: Sat, 20 Oct 2018 14:53:15 -0500
Subject: Use larger stack for media decoder threads

This increases the thread size for the platform decoder threads (to prevent stack overflows, particularly when decoding av1), while leaving the others at their default values.
---
 dom/media/VideoUtils.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'dom')

diff --git a/dom/media/VideoUtils.cpp b/dom/media/VideoUtils.cpp
index 2c8b67a9d..80d39a49f 100644
--- a/dom/media/VideoUtils.cpp
+++ b/dom/media/VideoUtils.cpp
@@ -207,8 +207,20 @@ already_AddRefed<SharedThreadPool> GetMediaThreadPool(MediaThreadType aType)
       name = "MediaPlayback";
       break;
   }
-  return SharedThreadPool::
+  RefPtr<SharedThreadPool> pool = SharedThreadPool::
     Get(nsDependentCString(name), MediaPrefs::MediaThreadPoolDefaultCount());
+
+  // Ensure a larger stack for platform decoder threads
+  if (aType == MediaThreadType::PLATFORM_DECODER) {
+    const uint32_t minStackSize = 512*1024;
+    uint32_t stackSize;
+    MOZ_ALWAYS_SUCCEEDS(pool->GetThreadStackSize(&stackSize));
+    if (stackSize < minStackSize) {
+      MOZ_ALWAYS_SUCCEEDS(pool->SetThreadStackSize(minStackSize));
+    }
+  }
+
+  return pool.forget();
 }
 
 bool
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