jdk-sandbox: Changelog

6978249: spill between cpu and fpu registers when those moves are fast Reviewed-by: kvn

6977640: Zero and Shark fixes Summary: A number of fixes for Zero and Shark. Reviewed-by: twisti Contributed-by: Gary Benson <gbenson@redhat.com>

6976372: # assert(_owner == Thread::current()) failed: invariant Reviewed-by: kvn, twisti

6975006: assert(check.is_deoptimized_frame()) failed: missed deopt Reviewed-by: kvn, twisti

6974176: ShouldNotReachHere, instanceKlass.cpp:1426 Reviewed-by: kvn, twisti

6978726: Bump the HS19 build number to 07 Summary: Update the HS19 build number to 07 Reviewed-by: jcoomes

6977924: Changes for 6975078 produce build error with certain gcc versions Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error. Reviewed-by: jcoomes, ysr, phh

6977970: CMS: concurrentMarkSweepGeneration.cpp:7947 assert(addr <= _limit) failed: sweep invariant Summary: Allow for the possibility (when the heap is expanding) that the sweep might skip over and past, rather than necessarily step on, the sweep limit determined at the beginning of a concurrent marking cycle. Reviewed-by: jmasa, tonyp

6975964: G1: print out a more descriptive message for evacuation failure when +PrintGCDetails is set Summary: we're renaming "evacuation failure" to "to-space overflow". I'm also piggy-backing a small additional change which removes the "Mark closure took..." output. Reviewed-by: ysr, johnc

6974928: G1: sometimes humongous objects are allocated in young regions Summary: as the title says, sometimes we are allocating humongous objects in young regions and we shouldn't. Reviewed-by: ysr, johnc

6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check Summary: There are a few issues in the code that calculates whether to resize the heap and by how much: a) some calculations can overflow 32-bit size_t's, b) min_desired_capacity is not bounded by the max heap size, and c) the assrt that fires is in the wrong place. The fix also includes some tidying up of the related verbose code. Reviewed-by: ysr, jmasa

6948538: CMS: BOT walkers can fall into object allocation and initialization cracks Summary: GC workers now recognize an intermediate transient state of blocks which are allocated but have not yet completed initialization. blk_start() calls do not attempt to determine the size of a block in the transient state, rather waiting for the block to become initialized so that it is safe to query its size. Audited and ensured the order of initialization of object fields (klass, free bit and size) to respect block state transition protocol. Also included some new assertion checking code enabled in debug mode. Reviewed-by: chrisphi, johnc, poonam

6977952: Test: Sync missing tests from hs16.3 to hs17.x Reviewed-by: wrockett

6976378: ParNew: stats are printed unconditionally in debug builds Reviewed-by: tonyp

6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers. Reviewed-by: dholmes, dice, jcoomes, kvn

6970376: ParNew: shared TaskQueue statistics Reviewed-by: ysr

6966222: G1: simplify TaskQueue overflow handling Reviewed-by: tonyp, ysr

6930581: G1: assert(ParallelGCThreads > 1 || n_yielded() == _hrrs->occupied(),"Should have yielded all the .. Summary: During RSet updating, when ParallelGCThreads is zero, references that point into the collection set are added directly the referenced region's RSet. This can cause the sparse table in the RSet to expand. RSet scanning and the "occupied" routine will then operate on different instances of the sparse table causing the assert to trip. This may also cause some cards added post expansion to be missed during RSet scanning. When ParallelGCThreads is non-zero such references are recorded on the "references to be scanned" queue and the card containing the reference is recorded in a dirty card queue for use in the event of an evacuation failure. Employ the parallel code in the serial case to avoid expanding the RSets of regions in the collection set. Reviewed-by: iveresov, ysr, tonyp

6963209: G1: remove the concept of abandoned pauses Summary: As part of 6944166 we disabled the concept of abandoned pauses (i.e., if the collection set is empty, we would still try to do a pause even if it is to update the RSets and scan the roots). This changeset removes the code and structures associated with abandoned pauses. Reviewed-by: iveresov, johnc

6962589: remove breadth first scanning code from parallel gc Summary: Remove the breadth-first copying order from ParallelScavenge and use depth-first by default. Reviewed-by: jcoomes, ysr, johnc

6814437: G1: remove the _new_refs array Summary: The per-worker _new_refs array is used to hold references that point into the collection set. It is populated during RSet updating and subsequently processed. In the event of an evacuation failure it processed again to recreate the RSets of regions in the collection set. Remove the per-worker _new_refs array by processing the references directly. Use a DirtyCardQueue to hold the cards containing the references so that the RSets of regions in the collection set can be recreated when handling an evacuation failure. Reviewed-by: iveresov, jmasa, tonyp

6581734: CMS Old Gen's collection usage is zero after GC which is incorrect Summary: Management code enabled for use by a concurrent collector. Reviewed-by: mchung, ysr

6982946: Change make/jprt.properties to defer to JPRT itself for jdk platform list Reviewed-by: kamg

Added tag jdk7-b108 for changeset eed672dd8675

Added tag jdk7-b108 for changeset 044d31b99ef5

Added tag jdk7-b107 for changeset c3c1f7961b1a

Added tag jdk7-b107 for changeset a8c1cf6a14b9

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Added tag jdk7-b107 for changeset 439de530aac5

Added tag jdk7-b106 for changeset 9af6b80c6f4b

Added tag jdk7-b106 for changeset c61d5f1854de

Added tag jdk7-b106 for changeset 443acf814b79

Added tag jdk7-b106 for changeset 07335a216c91

Added tag jdk7-b106 for changeset 546a8efadb54

Added tag hs19-b06 for changeset a5c5892863c7

Added tag hs19-b05 for changeset ffcd9ec2df9a

Added tag jdk7-b106 for changeset 60bd1c133a48

Added tag jdk7-b106 for changeset 3367eadd6595

Added tag jdk7-b106 for changeset 6bdae472f772

Added tag jdk7-b105 for changeset 60298a435212

Added tag jdk7-b105 for changeset fe0fb5c541c6

Added tag jdk7-b105 for changeset 989115191d21

Added tag jdk7-b105 for changeset 0e859833ce7c

6959252: convert the anonymous arrays to named arrays in Java List Resource files Reviewed-by: katakai, psun

Added tag jdk7-b105 for changeset 6a99ae51ed62

6977051: Bump the HS19 build number to 06 Summary: Update the HS19 build number to 06 Reviewed-by: jcoomes

6378314: Bad warning message when agent library not found. local directory is not searched. Summary: Print a more detailed error message for agent library load failure. Reviewed-by: jcoomes, never, ohair, coleenp Contributed-by: jeremymanson@google.com

6973329: C2 with Zero based COOP produces code with broken anti-dependency on x86 Summary: Recompile without subsuming loads if RA try to clone a node with anti_dependence. Reviewed-by: never

6976186: integrate Shark HotSpot changes Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure. Reviewed-by: kvn, twisti Contributed-by: Gary Benson <gbenson@redhat.com>

6975855: don't emit deopt MH handler in C1 if not required Summary: This CR implements the same for C1 as 6926782 for C2. Reviewed-by: never

6975027: use of movptr to set length of array Reviewed-by: kvn, iveresov

6975078: assert(allocated_on_res_area() || allocated_on_C_heap() || allocated_on_arena() Summary: Pass the check in ResourceObj() if _allocation value is already set and object is allocated on stack. Reviewed-by: dholmes, johnc

6975049: nsk/regression/b4287029 crashes with -Xss64 on solaris-i586 Summary: Tell C++ to not inline so much by using flag -xspace. Reviewed-by: ysr

6974682: CTW: assert(target != NULL) failed: must not be null Summary: Add address table size to constant section size. Reviewed-by: never

6973963: SEGV in ciBlock::start_bci() with EA Summary: Added more checks into ResourceObj and growableArray to verify correctness of allocation type. Reviewed-by: never, coleenp, dholmes

6973308: Missing zero length check before repne scas in check_klass_subtype_slow_path() Summary: set Z = 0 (not equal) before repne_scan() to indicate that class was not found when RCX == 0. Reviewed-by: never, phh