Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com

8024492: [TESTBUG] Test library class Platform.java needs to include methods for missing OS's and architectures
Summary: Added methods for 32bit, arm, ppc, x64 and x86
Reviewed-by: zgu, hseigel, mseledtsov

Summary: Moved the tests to /testlibrary_tests and updated TEST.groups
Reviewed-by: dholmes, sla

8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
Summary: Execute some code at a high virtual address value, and keep mapped
Reviewed-by: coleenp, zgu

8025088: Missing cases for JVM_CONSTANT_MethodHandleInError cause crash if debugger steps into error-tagged method handle
Summary: Need to refetch each method from InstanceKlass after all safepoints.  Removed leaky PreviousVersionInfo code.
Reviewed-by: coleenp, sspitsyn

Summary: replace PT_LOAD segment with library segment when necessary
Reviewed-by: dholmes, sla

Reviewed-by: sla, dsamersoff
Contributed-by: NYasumasa Suenaga <yasu@ysfactory.dip.jp>

Summary: reference_map[] array had uninitialized junk that was causing a bogus bootstrap method to be found.
Reviewed-by: hseigel, dcubed, sspitsyn

Summary: Need to refetch each method from InstanceKlass after all safepoints.  Removed leaky PreviousVersionInfo code.
Reviewed-by: dcubed, sspitsyn