Summary: Refactor the allocation code during GC to use the G1AllocRegion abstraction. Use separate subclasses of G1AllocRegion for survivor and old regions. Avoid BOT updates and dirty survivor cards incrementally for the former.
Reviewed-by: brutisso, johnc, ysr

Summary: Handlize MemoryUsage klass oop in createGCInfo routine
Reviewed-by: tonyp, fparain, ysr, jcoomes

Summary: Align the reserved size of the heap and perm to the heap region size to get a preferred heap base that is aligned to the region size, and call the correct heap reservation constructor. Also add a check in the heap reservation code that the reserved space starts at the requested address (if any).
Reviewed-by: kvn, ysr

Summary: Avoid overcounting when CMS has concurrent mode failure.
Reviewed-by: ysr
Contributed-by: rednaxelafx@gmail.com

Summary: In root processing, move the scanning of the reference processor's discovered lists to before RSet updating and scanning. When scanning the reference processor's discovered lists, use a buffering closure so that the time spent copying any reference object is correctly attributed. Also removed a couple of unused and irrelevant timers.
Reviewed-by: ysr, jmasa

Summary: Update the OOME stacktrace to contain Throwable.UNASSIGNED_STACK when the backtrace is filled in
Reviewed-by: mchung, phh

Summary: Pass arguments to runtime via java array for arrays with > 5 dimensions
Reviewed-by: never, kvn, jrose, pbk

Summary: Use new VIS3 mov instructions on T4 for move data between general and float registers.
Reviewed-by: never, twisti

Reviewed-by: dholmes, never, jwilhelm, kvn

Summary: do explicit lookup emulating old LD_LIBRARY_PATH search
Reviewed-by: kvn, jrose

Reviewed-by: dholmes, never, jwilhelm, kvn

Reviewed-by: dholmes, never, jwilhelm, kvn

Reviewed-by: dholmes, never, jwilhelm, kvn

Reviewed-by: dholmes, never, jwilhelm, kvn

Reviewed-by: kvn

Reviewed-by: twisti, iveresov

Summary: Recompile the enclosing methods without inlining of the method that has OSRed to level 4 or recompile the enclosing method at level 4.
Reviewed-by: kvn, never

Summary: Take into account current state of profiling before believing that existing higher level versions are valid
Reviewed-by: kvn, never

Summary: Call collect_stack_roots() before collect_simple_roots() as an optimization.
Reviewed-by: ysr, dsamersoff, dcubed
Contributed-by: ashok.srinivasa.murthy@oracle.com

Summary: cast constant array ptrs to bottom
Reviewed-by: never

Summary: take into account memory dependencies when clonning nodes in clone_up_backedge_goo().
Reviewed-by: never

Summary: parseClassFile() incorrectly uses nonstatic_oop_map_size() method instead of nonstatic_oop_map_count().
Reviewed-by: never
Contributed-by: NKrystal Mok <rednaxelafx@gmail.com>

Summary: Also reviewed by mikael.gerdin@oracle.com; stdlib:qsort() does byte-by-byte swapping on Windows. This leads to pointer shearing. Fix is to implement a quicksort that does full pointer updates.
Reviewed-by: never, coleenp, ysr

Summary: Extend and make more consistent the output from the G1PrintHeapRegions flag.
Reviewed-by: johnc, jmasa

Summary: VM_HeapWalkOperation::doit() should only reset mark bits when necessary.
Reviewed-by: dsamersoff, ysr, dholmes, dcubed
Contributed-by: ashok.srinivasa.murthy@oracle.com

Reviewed-by: never

Summary: don't skip receiver when GC'ing compiled invokedynamic callsites
Reviewed-by: twisti, kvn, jrose

Summary: Remove two unnecessary iterations over the collection set which are supposed to prepare the RSet's of the CSet regions for parallel iterations (we'll make sure this is done incrementally). I'll piggyback on this CR the removal of the G1_REM_SET_LOGGING code.
Reviewed-by: brutisso, johnc

Summary: Only cosmetic changes to make the concurrentMark.* more consistent, code-style-wise, with the rest of the codebase.
Reviewed-by: johnc, ysr

Summary: Keep 'ne' test in Counted loop when we can't guarantee during compilation that init < limit.
Reviewed-by: never

6916968: CMS: freeList.cpp:304 assert(_allocation_stats.prevSweep() + ..., "Conservation Principle")
Summary: Fix assert and adjust demand volume computation by adding missing factor.
Reviewed-by: jmasa, tonyp

Reviewed-by: jrose, twisti, bdelsart

Summary: Remove two unused parameters from the mem_allocate() method and update its uses accordingly.
Reviewed-by: stefank, johnc

Summary: When ExplicitGCInvokesConcurrent is enabled, do not perform an evacuation pause if a marking cycle is already in progress and block the requesting thread until the marking cycle completes.
Reviewed-by: tonyp, ysr

Reviewed-by: twisti, kvn, jrose

Reviewed-by: iveresov, never

Summary: Perform a heap verification after the first phase of G1's full GC using objects' mark words to determine liveness. The third parameter of the heap verification routines, which was used in G1 to determine which marking bitmap to use in liveness calculations, has been changed from a boolean to an enum with values defined for using the mark word, and the 'prev' and 'next' bitmaps.
Reviewed-by: tonyp, ysr

Summary: Some optimizations to improve the concurrent marking phase: specialize the main oop closure, make sure a few methods in the fast path are properly inlined, a few more bits and pieces, and some cosmetic fixes.
Reviewed-by: stefank, johnc

Summary: Removed dead code
Reviewed-by: ysr, coleenp, dholmes

Summary: It turns out that there is no need to explicitly stop CMS since the JVM is taken down at a terminal safepoint during which CMS threads are (terminally) inactive. This  will need to be revised if and when we evolve in the future to a point where we allow JVM reincarnation in the same process, but those changes will be much more sweeping than just terminating CMS threads. The unused ::stop() methods will be removed in a separate CR. Also include in this CR is the fix for a small typo in the spelling of UseGCLogFileRotation in a message in arguments.cpp, brought to our attention by Rainer Jung and reviewed by minqi.
Reviewed-by: johnc, jwilhelm