1 files changed, 18 insertions, 2 deletions
diff --git a/WebCore/platform/TreeShared.h b/WebCore/platform/TreeShared.h
index 02728ff..a60ad0d 100644
--- a/WebCore/platform/TreeShared.h
+++ b/WebCore/platform/TreeShared.h
@@ -23,6 +23,9 @@
 
 #include <wtf/Assertions.h>
 #include <wtf/Noncopyable.h>
+#ifndef NDEBUG
+#include <wtf/Threading.h>
+#endif
 
 namespace WebCore {
 
@@ -32,6 +35,7 @@ public:
         : m_refCount(initialRefCount)
         , m_parent(0)
     {
+        ASSERT(isMainThread());
 #ifndef NDEBUG
         m_deletionHasBegun = false;
         m_inRemovedLastRefFunction = false;
@@ -39,11 +43,13 @@ public:
     }
     virtual ~TreeShared()
     {
+        ASSERT(isMainThread());
         ASSERT(m_deletionHasBegun);
     }
 
     void ref()
     {
+        ASSERT(isMainThread());
         ASSERT(!m_deletionHasBegun);
         ASSERT(!m_inRemovedLastRefFunction);
         ++m_refCount;
@@ -51,6 +57,7 @@ public:
 
     void deref()
     {
+        ASSERT(isMainThread());
         ASSERT(!m_deletionHasBegun);
         ASSERT(!m_inRemovedLastRefFunction);
         if (--m_refCount <= 0 && !m_parent) {
@@ -73,8 +80,17 @@ public:
         return m_refCount;
     }
 
-    void setParent(T* parent) { m_parent = parent; }
-    T* parent() const { return m_parent; }
+    void setParent(T* parent)
+    { 
+        ASSERT(isMainThread());
+        m_parent = parent; 
+    }
+
+    T* parent() const
+    {
+        ASSERT(isMainThread());
+        return m_parent;
+    }
 
 #ifndef NDEBUG
     bool m_deletionHasBegun;