4965777: GC changes to support use of discovered field for pending references Summary: If and when the reference handler thread is able to use the discovered field to link reference objects in its pending list, so will GC. In that case, GC will scan through this field once a reference object has been placed on the pending list, but not scan that field before that stage, as the field is used by the concurrent GC thread to link discovered objects. When ReferenceHandleR thread does not use the discovered field for the purpose of linking the elements in the pending list, as would be the case in older JDKs, the JVM will fall back to the old behaviour of using the next field for that purpose. Reviewed-by: jcoomes, mchung, stefank

Merge

7085906: Replace the permgen allocated sentinelRef with a self-looped end Summary: Remove the sentinelRef and let the last Reference in a discovered chain point back to itself. Reviewed-by: ysr, jmasa

7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions Summary: It introduces ergonomic decision logging in G1 for the following heuristics: heap sizing, collection set construction, concurrent cycle initiation, and partially-young GC start/end. The code has a bit of refactoring in a few places to make the decision logging possible. It also replaces alternative ad-hoc logging that we have under different parameters and switches (G1_DEBUG, G1PolicyVerbose). Reviewed-by: johnc, ysr

7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB) Summary: Try using small pages when transparent huge pages allocation fails Reviewed-by: ysr

Merge

7085012: ARM: com/sun/jdi/PopSynchronousTest.java still fails Summary: InterpreterRuntime::popframe_move_outgoing_args() is required for the ARM interpreter. Reviewed-by: kvn, twisti

Merge

7086394: c2/arm: enable UseFPUForSpilling Summary: ARM has instructions to move data directly between the fpu and integer registers. Reviewed-by: kvn, never

7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244) Reviewed-by: kvn

7086560: 7085404 changes broke VM with -XX:-EnableInvokeDynamic Summary: Add check that ciEnv::_CallSite_klass is initialized. Reviewed-by: jrose

Merge

7071307: MethodHandle bimorphic inlining should consider the frequency Reviewed-by: twisti, roland, kvn, iveresov

7016881: JSR 292: JDI: sun.jvm.hotspot.utilities.AssertionFailure: index out of bounds Reviewed-by: kvn, twisti

7039731: arraycopy could use prefetch on SPARC Summary: Use BIS and prefetch in arraycopy stubs for Sparc (BIS for T4 only). Reviewed-by: never, iveresov

7071709: JSR 292: switchpoint invalidation should be pushed not pulled Reviewed-by: never

7085404: JSR 292: VolatileCallSites should have push notification too Reviewed-by: never, kvn

7079673: JSR 292: C1 should inline bytecoded method handle adapters Reviewed-by: never

7083786: dead various dead chunks of code Reviewed-by: iveresov, kvn

7085137: -XX:+VerifyOops is broken Summary: Replace set() with patchable_set() to generate 8 instructions always. Reviewed-by: iveresov, never, roland

7078382: JSR 292: don't count method handle adapters against inlining budgets Reviewed-by: kvn, never

7085279: C1 overflows code buffer with VerifyOops and CompressedOops Summary: Increase the limit of code emitted per LIR instruction, increase the max size of the nmethod generated by C1 Reviewed-by: never, kvn, johnc

7082263: Reflection::resolve_field/field_get/field_set are broken Reviewed-by: kvn, dholmes, stefank, coleenp

7083184: JSR 292: don't store context class argument with call site dependencies Reviewed-by: jrose, never

6591247: C2 cleans up the merge point too early during SplitIf Summary: Remove region self reference last Reviewed-by: kvn, never

7059037: Use BIS for zeroing on T4 Summary: Use BIS for zeroing new allocated big (2Kb and more) objects and arrays. Reviewed-by: never, twisti, ysr

7082949: JSR 292: missing ResourceMark in methodOopDesc::make_invoke_method Reviewed-by: kvn, twisti

Merge