Summary: Back-out 8052081 changes made in lcm.cpp.
Reviewed-by: iveresov, roland

Summary: Fixed Whitebox.deoptimizeMethod() to deoptimize all OSR versions of the method.
Reviewed-by: kvn, iignatyev

Summary: Fixed 'SimpleThresholdPolicy::event' to always perform OSR if an OSR nmethod is available.
Reviewed-by: kvn, iveresov

Reviewed-by: dholmes, brutisso

Reviewed-by: coleenp, sspitsyn, jfranck

Summary: Implemented the interface in sun.misc.URLClassPath and corresponding JVM_XXX APIs
Reviewed-by: mchung, acorn, jiangli, dholmes

Summary: fixed order of DeoptReason values declaration so now it matches the order used in jdk9 and the names order in Deoptimization::_trap_reason_name.
Reviewed-by: kvn

8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
Summary: Remove -XX:-G1DeferredRSUpdate functionality as it is racy. During evacuation failure handling, threads where evacuation failure handling occurred may try to add remembered sets to regions which remembered sets are currently being scanned. The iterator to handle the remembered set scan does not support addition of entries during scan and so may skip valid references.
Reviewed-by: iveresov, brutisso, mgerdin

Summary: Ergonomics updates flags for number of GC threads
Reviewed-by: tschatzl, jwilhelm
Contributed-by: sangheon.kim@oracle.com

8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
Summary: Make sure MH intrinsics can be created before compiler instances
Reviewed-by: kvn

Reviewed-by: coleenp, minqi

Summary: ClassLoader for array klass set to null and not the class loader of the component type.
Reviewed-by: dcubed, ctornqvi

8058818: Allocation of more then 1G of memory using Unsafe.allocateMemory is still causing a fatal error on 32bit platforms
Summary: The assert was firing for NMT_Off and minimal too even though the size isn't used.
Reviewed-by: gtriantafill, dholmes

Reviewed-by: brutisso, tschatzl

Summary: Enable yc to be forced for stat update.
Reviewed-by: mgerdin, jcoomes

Reviewed-by: tschatzl, stefank

Reviewed-by: brutisso, jwilhelm

Reviewed-by: brutisso, mgerdin, tschatzl

Reviewed-by: fparain, dcubed, mdoerr
Contributed-by: NBill Pittore <bill.pittore@oracle.com>

Summary: Replace G1CodeRootSet with a Hashtable based implementation, merge Code Root Migration phase into Code Root Scanning
Reviewed-by: jmasa, brutisso, tschatzl

Reviewed-by: gziemski, jmasa, brutisso, coleenp, tschatzl

Summary: Fix UnsafeRawOp optimizations
Reviewed-by: kvn, drchase, vlivanov

Summary: Ensure MethodCounters are created before method is enqueued for compilation
Reviewed-by: kvn, drchase, jiangli, roland

Summary: Splitting out a g1 allocator class to simply specialized allocators which can associate each allocation with a given context.
Reviewed-by: mgerdin, brutisso

Reviewed-by: mgerdin, tschatzl, jmasa

Summary: Remove check that causes the VerifyError
Reviewed-by: dholmes, coleenp, acorn

8055635: Missing include in g1RegionToSpaceMapper.hpp results in unresolved symbol of fastdebug build without precompiled headers
Reviewed-by: mgerdin, ehelin

Summary: Fixed memory leak in NMT by baselining memory in c heap instead of an arena.
Reviewed-by: coleenp, minqi

Summary: If large pages are enabled and configured in Linux, the VM always pre-commits the entire space. The VM fails verification of the commit of the initial heap because some internal data structure marked all memory pages of the heap as committed during initialization. This makes the code think that we attempted a double-commit during first allocation of the heap. Remove the initial marking of memory pages of the heap to committed.
Reviewed-by: mgerdin

Summary: Allow G1 to decommit memory of arbitrary regions within the heap and their associated auxiliary data structures card table, BOT, hot card cache, and mark bitmaps.
Reviewed-by: mgerdin, brutisso, jwilhelm

8055061: assert at share/vm/services/virtualMemoryTracker.cpp:332 Error: ShouldNotReachHere() when running NMT tests
Summary: Handled CDS mapping region and added test for the scenario
Reviewed-by: coleenp, ctornqvi

Summary: Refactored emptyStack to a static member of NativeCallStack, which is accessible in minimal build.
Reviewed-by: coleenp, dholmes

Summary: Let HeapRegionSeq manage the heap region and auxiliary data to decrease the amount of responsibilities of G1CollectedHeap, and encapsulate this work from other code.
Reviewed-by: jwilhelm, jmasa, mgerdin, brutisso

Reviewed-by: tschatzl, jmasa

Summary: Re-enabled warning as launcher change reached promotion build
Reviewed-by: hseigel, coleenp

Summary: negative verify_guards when testing for corruption
Reviewed-by: sla, fparain

Summary: Wrapped memory with standard bounds checking "GuardedMemory".
Reviewed-by: zgu, fparain, dcubed

Summary: Dynamic allocate _reserved_regions instead of static object to avoid racing during process exit
Reviewed-by: dholmes, coleenp

Summary: Parse catch clause paths to ensure they end in throws
Reviewed-by: dlong, acorn, kamg, ctornqvi, lfoltan

Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene