Summary: check fr.sender_sp() in java thread instead of os::is_first_C_frame(&fr).
Reviewed-by: twisti, coleenp

Reviewed-by: kvn, jrose

Summary: added missing check for loop padding case.
Reviewed-by: kvn, jrose

Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com

Reviewed-by: roland, sla, dholmes

8027257: [TESTBUG] compiler/ciReplay/TestVM.sh : Error: Could not find or load main class negative_test
Reviewed-by: roland, kvn

8027124: [TESTBUG] NonTieredLevelsTest: java.lang.RuntimeException: private TestCase$Helper(java.lang.Object) must be osr_compiled
Reviewed-by: kvn, roland

8025644: java/util/stream/test/org/openjdk/tests/java/util/stream/ToArrayOpTest.java fails with TestData$OfRef): failure java.lang.AssertionError: expected [true] but found [false]
Summary: In GraphKit::gen_checkcast() provide only exact superklass to GraphKit::maybe_cast_profiled_receiver()
Reviewed-by: kvn, roland

Summary: cleaned up warnings in solaris specific os code.
Reviewed-by: coleenp, fparain, dcubed
Contributed-by: gerald.thornbrugh@oracle.com

Reviewed-by: dcubed, mgronlun

Summary: Consolidated C2 x86 locking code in one place in macroAssembler_x86.cpp.
Reviewed-by: roland

Summary: Remove search in system dictionary and hacks, replace with verifying in CLD::_klasses list.
Reviewed-by: dcubed, acorn