move fence to the right place (dotnet#82661)

mikem8361 · Feb 26, 2023 · 85e85e7 · 85e85e7
1 parent 4b2a6e7
commit 85e85e7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
@@ -16832,7 +16832,8 @@ BOOL gc_heap::a_fit_segment_end_p (int gen_number,
     // (see also: object.cpp/Object::ValidateInner)
     // Make sure it will see cleaned up state to prevent triggering occasional verification failures.
     // And make sure the write happens before updating "allocated"
-    VolatileStore(((void**)allocated - 1), (void*)0);     //clear the sync block
+    ((void**)allocated)[-1] = 0;    // clear the sync block
+    VOLATILE_MEMORY_BARRIER();
 #endif //VERIFY_HEAP && _DEBUG
 
     uint8_t* old_alloc;