8210237: [TESTBUG]gc/stress/TestStressIHOPMultiThread.java fails with 'Unexpected exit from test [exit code: 1]' in CDS mode
Summary: Fix TestStressIHOPMultiThread to handle possible OutOfMemoryError.
Reviewed-by: ccheung, gziemski
8203466: intermittent crash at jdk.internal.misc.Unsafe::getObjectVolatile (native)
Summary: Store rsi, rdi on thread local memory, store r15 in r9, for the stubs that have gc barriers
Reviewed-by: dlong, eosterlund