This bug 7178741 will include the fixes for this problem Linux on x86 and x64.
They are similar to what went in to jdk6.
I will relate this to bug 6313816 which describes the same problem on Windows (x86 and x64 are affected),
so that bug can provide a separate fix on Windows, as the fix is not quite the same.
This failure happens when on some Linux platforms, ThreadContext is not populated correctly and esp is found out to be null in sender(). The correct solution for that would be to find out why the ThreadContext register values are not correct.
But to complete the fix for 6310967 and to fix this regression, I think it would be good to add a check for the alignment of rbp/ebp values in sender() methods.