Summary: An evacuation failure while copying the roots caused an object, A, to be forwarded to itself. During the subsequent RSet updating a reference to A was processed causing the reference to be added to the RSet of A's heap region. As a result of adding to the remembered set we ran into the issue described in 6930581 - the sparse table expanded and the RSet scanning code walked the cards in one instance of RHashTable (_cur) while the occupied() counts the cards in the expanded table (_next).
Reviewed-by: tonyp, iveresov

Summary: Weakened assert in onj_is_alive() to allow its use at initialization time when is_at_safepoint() normally reports false; added some related asserts to check order of is_init_completed() after Universe::is_fully_initialized().
Reviewed-by: jcoomes

Summary: Weaken assert by excluding scavenges resulting from -XX:+ScavengeALot stress-testing option.
Reviewed-by: jmasa, tonyp

Summary: fix index check
Reviewed-by: never

Summary: The plug that guards the use of compressed oops with invokedynamic needs to be removed
Reviewed-by: twisti, kvn

6996613: CompactibleFreeListSpace::print should call CompactibleFreeListSpace::print_on, not Space::print_on
Reviewed-by: tonyp

Summary: Do several iterations to build EA Connection Graph.
Reviewed-by: never, twisti, ysr

Summary: use unsigned DIV instruction
Reviewed-by: never

Summary: Fix the compiler error. Allow to build just c2 specifying FORCE_TIERED=0 on the command line.
Reviewed-by: never, kvn

Summary: Since we are at a stop-world pause, the existing CMS-phase checks are sufficient for safety, and the locking check can be safely elided. Elaborated documentation comment to the case where class unloading and verification are disabled, and the query happens when we aren't in the sweeping phase, where the answer "false" would be (almost everywhere) too pessimistic.
Reviewed-by: jmasa, johnc, tonyp

Summary: Add missing line to vmStructs.  Also fix bug with class dumper.
Reviewed-by: twisti, kvn

Summary: Change property value to 1.<major_version> for major_version >= 7
Reviewed-by: dholmes, acorn

Reviewed-by: kvn, jrose, never

Summary: Turn CDS off if compressed oops is on
Reviewed-by: ysr, kvn, jcoomes, phh

6996240: The BitSet.length method sometimes returns an index+1 value less than that of the highest bit set.
Reviewed-by: never, kvn

Summary: Use hardware DIV instruction for long division by constant when it is faster than code with multiply.
Reviewed-by: never

Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti

Summary: Small bug fix to make "raw" adapters work for JDK changes under 6981777
Reviewed-by: twisti

Summary: SPARC code missing from fix to 6939224
Reviewed-by: twisti

Summary: Distinguish pool indexes from cache indexes in recently changed code.
Reviewed-by: never

Summary: Sharpened an assert, introduced in 6896603, that intended to check that the incremental_collection_failed() predicate on the heap was being reset "soon enough".
Reviewed-by: jmasa

Summary: The logic of ClassFileParser::java_dyn_MethodHandle_fix_pre needs to take care of an already changed vmentry signature.
Reviewed-by: never, jrose

Summary: Update verifier to conform to spec re: reference vs. 'Object' types
Reviewed-by: dholmes, coleenp

6891959: HotSpot should not throw ClassFormatError if a class has a field with '>' and/or '<' in its name
Summary: Class file parser needs to look for and disallow '[' in names.
Reviewed-by: coleenp, never

Summary: Deprecated HandlePromotionFailure, removing the ability to turn off that feature, did away with one epoch look-ahead when deciding if a scavenge is likely to fail, relying on current data.
Reviewed-by: jmasa, johnc, poonam

Summary: reduce complexity by factoring synchronizer.cpp
Reviewed-by: dholmes, never, coleenp

Summary: 6953477 broke Zero.
Reviewed-by: twisti
Contributed-by: NGary Benson <gbenson@redhat.com>

Summary: Closed a timing hole during which concurrent full gc requests can be missed. The hole can increase the latency of the response to a full gc request by up to the value of CMSWaitDuration. If CMSWaitDuration=0 is, as currently, interpreted as an unbounded wait, suitable in certain tuning scenarios, the application can potentially hang. Made two obscure tunables, including CMSWaitDuration, manageable.
Reviewed-by: jcoomes, tonyp

Reviewed-by: kvn, jrose, dholmes, coleenp

Summary: Repair stackmap table attribute when relocating bytecode
Reviewed-by: acorn, never

Reviewed-by: kvn, twisti

Summary: Temporarily fix to disable compressed oops with CDS
Reviewed-by: dholmes, twisti, kvn, never

Reviewed-by: never

Reviewed-by: kvn, jrose, dsamersoff

Summary: There is a race between the concurrent refinement threads and the humongous object allocation that can cause the concurrent refinement threads to corrupt the part of the BOT that it is being initialized by the humongous object allocation operation. The solution is to do the humongous object allocation in careful steps to ensure that the concurrent refinement threads always have a consistent view over the BOT, region contents, and top. The fix includes some very minor tidying up in sparsePRT.
Reviewed-by: jcoomes, johnc, ysr

6988458: G1: assert(mr.end() <= _cm->finger()) failed: otherwise the region shouldn't be on the stack
Summary: The changes from 6941395 did not clear the CMTask::_aborted_region fields when concurrent marking aborted because of overflow. As a result, the next time around we could see a memory region whose start address was above the global finger and the assertion tripped. Moved the clearing of the aborted regions to ConcurrentMark::clear_marking_state, which is executed on all of the exit paths.
Reviewed-by: tonyp, ysr, jmasa

Summary: The remembered set iterator for sparse tables incorrectly assumes that index 0 corresponds to the bottom of the heap, not address 0 as it is the case.
Reviewed-by: ysr, jmasa

Reviewed-by: kvn, iveresov

Summary: Ifop optimization for c1
Reviewed-by: never, phh, iveresov

Summary: When an entry is stolen, don't push it on the task queue but process it directly.
Reviewed-by: iveresov, ysr, jcoomes