jdk-sandbox: Changelog

6996136: VM crash in src/share/vm/runtime/virtualspace.cpp:424 Summary: Turn CDS off if compressed oops is on Reviewed-by: ysr, kvn, jcoomes, phh

6995045: assert(!gch->incremental_collection_failed()) failed: Error, defNewGeneration.cpp:827 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

6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data 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

6992998: CMSWaitDuration=0 causes hangs with +ExplicitGCInvokesConcurrent 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

6991377: G1: race between concurrent refinement and humongous object allocation 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

6992189: G1: inconsistent base used in sparse rem set iterator 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

6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly Summary: When an entry is stolen, don't push it on the task queue but process it directly. Reviewed-by: iveresov, ysr, jcoomes

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

6988353: refactor contended sync subsystem Summary: reduce complexity by factoring synchronizer.cpp Reviewed-by: dholmes, never, coleenp

6991315: RedefineClasses fails with java.lang.VerifyError Summary: Repair stackmap table attribute when relocating bytecode Reviewed-by: acorn, never

6989669: Coops: -Xshare:dump causes crash Summary: Temporarily fix to disable compressed oops with CDS Reviewed-by: dholmes, twisti, kvn, never

6992477: fix for 6991512 broke sparc barriers Reviewed-by: kvn, iveresov

6392697: Additional flag needed to supress Hotspot warning messages Summary: Apply PrintJvmWarnings flag to all warnings Reviewed-by: coleenp, phh

6989297: Integrate additional portability improvements Reviewed-by: vladidan, dholmes

6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong Summary: min_stack_allowed is a compile time constant and Stack*Pages are settable Reviewed-by: dholmes, kvn

6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever Summary: Absolute time 0 needs to return immediately. Reviewed-by: phh, dcubed, dholmes

6988363: Rebrand vm vendor property settings (jdk7 only) Summary: Vendor properties should be initialized after JDK version is determined. Reviewed-by: kamg, ohair, dcubed, dholmes

6989448: G1: refactor and simplify G1ParScanThreadState Reviewed-by: iveresov, tonyp

6971296: G1: simplify G1RemSet class hierarchy Summary: Remove G1RemSet base class and StupidG1RemSet class; rename HRInto_G1RemSet to just G1RemSet. Reviewed-by: ysr, tonyp