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-rw-r--r--mozglue/misc/StackWalk_windows.h21
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diff --git a/mozglue/misc/StackWalk_windows.h b/mozglue/misc/StackWalk_windows.h
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+#ifndef mozilla_StackWalk_windows_h
+#define mozilla_StackWalk_windows_h
+
+#include "mozilla/Types.h"
+
+/**
+ * Allow stack walkers to work around the egregious win64 dynamic lookup table
+ * list API by locking around SuspendThread to avoid deadlock.
+ *
+ * See comment in StackWalk.cpp
+ */
+MFBT_API void
+AcquireStackWalkWorkaroundLock();
+
+MFBT_API bool
+TryAcquireStackWalkWorkaroundLock();
+
+MFBT_API void
+ReleaseStackWalkWorkaroundLock();
+
+#endif // mozilla_StackWalk_windows_h